A KEDER ROOF SYSTEM
A keder roof system comprising a first elongated rail structure (30) with a first keder groove (31) and a first tarpaulin (15) having a rectangular form with first and second opposite side edges, wherein the first tarpaulin (15) has a first keder chord (38) located along the first side edge and second keder chord (39) located along the second side edge, and wherein the first keder chord (38) is configured for being inserted into, and slidingly moveable within, the first keder groove (31) of the first elongated rail structure (30). The keder roof system further comprises a first shuttle arrangement (40) fastened to the first tarpaulin (15), wherein the first shuttle arrangement (40) has a rope attachment structure (83). The keder roof system further comprises a pull rope (14) configured for being attached to the rope attachment structure (83) of the first shuttle arrangement (40). The first elongated rail structure (30) comprises a rope guiding structure (52) configured for holding and guiding the pull rope (14) along the first elongated rail structure (30) at a location outside of the first keder groove (31). Moreover, the pull rope (14) and a portion of the first shuttle arrangement (40) are configured to pass through the rope guiding structure (52) of the first elongated rail structure (30) when the first tarpaulin (15) is being mounted on the first elongated rail structure (30).
The present disclosure relates to keder roof system, as well as a method for assembling a keder roof system. The keder rood system is for example suitable for temporary installations, but may alternatively be used for buildings that are more permanent. The keder roof system is for example suitable as weather protection.
Moreover, even if the keder roof system according to the disclosure will be described primarily in relation to a roof, the keder roof system is not restricted to this use, but may equally be used for other purposes, such as side wall, privacy protection, or the like.
BACKGROUNDKeder is attached to fabric to create a continuous sealed connection between fabric and frame. Keder is used in a variety of applications including both permanent & semi-permanent tents & structures.
Keder roof systems are known in the prior art. These known keder roof systems typically has specially designed roof support beams with integrated keder groove for enabling installation of a tarpaulin stretching between two neighbouring support beams.
A keder roof system comprises a sheet fabric or tarpaulin having a keder chord attached thereto a side edge of a fabric, and a keder groove may be provided in a support beam. Upon inserting the keder chord into the keder groove, a continuous sealed connection between fabric and support beam is accomplished. Keder is used in a variety of applications including both permanent & semi-permanent tents & structures.
In the known keder roof systems, the tarpaulin typically includes a pocket into which a laterally extending elongated pole or similar type of elongated rigid member may be inserted prior to mounting of the tarpaulin. A pull rope is then fastened to the pole, which acts a force transmitting member between the pull rope and the tarpaulin during mounting of the tarpaulin on the roof support beams. After finished assembly, the keder roof assembly staff generally climbs up on the keder roof for dismounting the pole from the keder roof for ensuring that the pole does not accidentally fall down during subsequent use of the keder roof.
These prior art keder roof design generally works well, but there is nevertheless a continuous demand for further improved performance, in particular in terms of cost-efficiency and safety.
SUMMARYOne particular problem with the prior art keder roof systems is the need for a dedicated roof support beam having the required keder groove. Hence, even if a user already has access to a conventional roof support beam without keder groove, such as a lattice girder, the user must nevertheless obtain another roof support beam having said keder groove.
Furthermore, the climbing-up on the mounted keder roof for disassembling the pole may involve a risk for accidents, for example in terms of falling persons or falling objects.
There is thus a demand for further improved performance, in particular in terms of cost-efficiency and safety.
An object of the present disclosure is to provide a keder roof system where the previously mentioned problems are avoided. This object is at least partly achieved by the features of the independent claims. The dependent claims contain further developments of the keder roof system.
According to a first aspect of the present disclosure, there is provided a keder roof system comprising: a first elongated rail structure with a first keder groove; a first tarpaulin having a rectangular form with first and second opposite side edges, wherein the first tarpaulin has a first keder chord located along the first side edge and second keder chord located along the second side edge, and wherein the first keder chord is configured for being inserted into, and slidingly moveable within, the first keder groove of the first elongated rail structure; a first shuttle arrangement fastened to the first tarpaulin, wherein the first shuttle arrangement has a rope attachment structure; a pull rope configured for being attached to the rope attachment structure of the first shuttle arrangement; wherein the first elongated rail structure comprises a rope guiding structure configured for holding and guiding the pull rope along the first elongated rail structure at a location outside of the first keder groove; and wherein the pull rope and a portion of the first shuttle arrangement are configured to pass through the rope guiding structure of the first elongated rail structure when the first tarpaulin is being mounted on the first elongated rail structure.
According to a second aspect of the present disclosure, there is provided a method for assembling a keder roof system, the method comprising: providing a first elongated rail structure having a first keder groove and a rope guiding structure; a first tarpaulin having a rectangular form with first and second opposite side edges, wherein the first tarpaulin has a first keder chord located along the first side edge and second keder chord located along the second side edge; and a first shuttle arrangement fastened to the first tarpaulin. The method further comprises installing a pull rope in the pull rope guiding structure of the first elongated rail structure and attaching the pull rope to a pull rope attachment structure of the first shuttle arrangement; and assembling the first tarpaulin on the first elongated rail structure by pulling the pull rope for slidingly installing the first keder chord in the first keder groove, while holding and guiding the pull rope along the first elongated rail structure at a location outside of the first keder groove by means of the rope guiding structure, and while a portion of the first shuttle arrangement passes through the rope guiding structure of the first elongated rail structure.
In this way, thanks to the fact that the first shuttle arrangement is fastened to the first tarpaulin, the risk that the first shuttle arrangement may accidentally fall down during use of the keder roof is eliminated, thereby also eliminating the need to climb up on the keder roof for dismounting the first shuttle arrangement. There is consequently also no need to climb up on the keder roof for re-installing the first shuttle arrangement when the keder roof is disassembled.
Furthermore, the pull rope guiding structure of the first elongated rail structure ensures that the pull rope is securely held in correct position during assembly of the roof support beam, as well as during subsequent installation of the tarpaulin on the support beam. Without such pull rope guiding structure of the first elongated rail structure, the pull rope may easily become displaced from its appropriate position, thereby rendering the subsequent mounting of the tarpaulin on the support beam more difficult or even impossible.
For example, the direction of pulling force exerted by the pull rope on the tarpaulin should preferably be more or less in parallel with a direction of elongated of the keder groove at the position of the first shuttle arrangement, for ensuring a smooth and low-resistance sliding of the first keder chord in the first keder groove, and the pull rope guiding structure of the first elongated rail structure may be positioned for improving said level of parallelism.
This is particularly relevant in circumstances when the tarpaulin is mounted on an underside of the roof support beam, because such an installation prevents the use of a laterally extending roof ridge beam for guidance of the pull rope. Consequently, in such situations, the direction of pulling force exerted by the pull rope on the tarpaulin may diverge significantly from a direction of elongated of the keder groove at the position of the first shuttle arrangement, thereby rendering the installation of the tarpaulin difficult and time-consuming, and also possibly even incurring damages to the tarpaulin, pull rope, and/or first elongated rail structure.
Further advantages are achieved by implementing one or several of the features of the dependent claims. For example, the keder roof system may further comprise a second elongated rail structure with a first keder groove, wherein the second elongated rail structure is configured for being located next to the first elongated rail structure for defining a roof bay area, and wherein the second keder chord is configured for being inserted into, and slidingly moveable within, the first keder groove of the second elongated rail structure; a second shuttle arrangement fastened to the first tarpaulin, wherein the second shuttle arrangement has a rope attachment structure; a pull rope configured for being attached to the rope attachment structure of the second shuttle arrangement; wherein the second elongated rail structure comprises a rope guiding structure configured for holding and guiding the pull rope along the second elongated rail structure at a location outside of the first keder groove; wherein the pull rope and a portion of the second shuttle arrangement are configured to pass through the rope guiding structure of the second elongated rail structure when the first tarpaulin is being mounted on the first and second elongated rail structures; and wherein the keder roof system is configured for simultaneous pulling the pull ropes of the first and second shuttle arrangements for slidingly installing the first tarpaulin on the first and second elongated rail structures.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated rail structure is composed of a plurality of elongated rail sections connected end to end to jointly form the first elongated rail structure. This enables a modular and flexible design of the elongated rail structure.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second elongated rail structure is composed of a plurality of elongated rail sections connected end to end to jointly form the second elongated rail structure.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, at least one elongated rail section of the first elongated rail structure comprises a rail holder, in particular two, three or four rail holders, for detachable fastening of the elongated rail section to a first roof support beam, in particular on a vertical upper or lower side of the first roof support beam. Thereby, the need for a costly dedicated roof support beam having the required keder groove is eliminated, and a user may rely on a conventional roof support beam, such as a lattice girder, without keder groove, when building keder roof system.
Similarly, when the keder roof system further comprises a second elongated rail structure, at least one elongated rail section of the second elongated rail structure comprises a rail holder, in particular two, three or four rail holders, for detachable fastening of the elongated rail section to a second roof support beam, in particular on a vertical upper or lower side of the second roof support beam.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rail holder has a foot for detachable fastening of the elongated rail section on the first and/or second roof support beam, and wherein a contact surface of the foot is located spaced apart from the first keder groove with a distance of at least 10 cm, specifically at least 25 cm, and more specifically within a range of 10-150 cm. Thereby, the risk that the tarpaulin comes in contact with the laterally extending brazing elements of the roof support structure is reduced, and the damages and wear associated with such contact is eliminated.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the foot of the rail holder comprises: a clamping mechanism for clamping attachment of the foot to the first and/or second roof support beam; or at least two spring-loaded pins for detachable engagement with corresponding holes in the first and/or second roof support beam. A clamping mechanism provides a general solution that is compatible with a large number of different roof support beams, and a clamping mechanism with spring-loaded pins have the advantage of provide a very accurate and reliable angular positioning of the elongated rail, such that the tarpaulin is more easily mounted and dismounted.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated rail structure is integrally formed in a first roof support beam. This provides a more compact design.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second elongated rail structure is integrally formed in the second roof support beam.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rope guiding structure of the first and/or second elongated rail structure comprises at least one individual rope guiding member located on an elongated rail section, in particular two, three, four or five individual rope guiding members located longitudinally spaced apart on an elongated rail section. Thereby, the material, weight and cost can be reduced, because individual rope guiding members may be positioned only where needed.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first and/or second elongated rail structure is composed of at least one curved elongated rail section and at least one straight elongated rail section, wherein the least one individual rope guiding member is located on the at least one curved elongated rail section, and wherein at least one, specifically all, straight elongated rail section is free from said rope guiding structure. Thereby, the material, weight and cost can be reduced, because individual rope guiding members may be positioned only where needed.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated rail structure, at each point along its length, has an extension in a direction of elongation, a lateral direction located in a plane of the intended roof and perpendicular to the direction of elongation, and a height direction that is perpendicular to both the direction of elongation and lateral direction, wherein the first elongated rail structure has first and second keder grooves located on a first lateral side of the first elongated rail structure and being mutually offset in the height direction, and wherein the first elongated rail structure further has third and fourth keder grooves located on a second lateral side of the first elongated rail structure, opposite to the first lateral side, and being mutually offset in the height direction, such that two individual tarpaulins may be mounted on each lateral side of the first elongated rail structure in an overlapping arrangement. As a result, the keder roof system may be designed based on various different combinations of tarpaulins, thereby providing increased flexibility in terms of size of the keder roof, as well as in terms of the size of the tarpaulins used.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second elongated rail structure has first and second keder grooves located on a first lateral side of the first elongated rail structure and being mutually offset in the height direction, and wherein the second elongated rail structure further has third and fourth keder grooves located on a second lateral side of the second elongated rail structure, opposite to the first lateral side, and being mutually offset in the height direction, such that two individual tarpaulins may be mounted on each lateral side of the second elongated rail structure in an overlapping arrangement.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rope guiding structure of the first elongated rail structure comprises: a first rope guiding portion located adjacent the first keder groove and configured for guiding a pull rope connected to a first tarpaulin mounted in the first keder groove; a second rope guiding portion located adjacent the second keder groove and configured for guiding a pull rope connected to a second tarpaulin mounted in the second keder groove; a third rope guiding portion located adjacent the third keder groove and configured for guiding a pull rope connected to a third tarpaulin mounted in the third keder groove; and a fourth rope guiding portion located adjacent the fourth keder groove and configured for guiding a pull rope connected to a fourth tarpaulin mounted in the fourth keder groove. Having separate rope guiding portion for each keder groove provides reduces risk for interference between different pull ropes.
Similarly, when the keder roof system further comprises a second elongated rail structure, the rope guiding structure of the second elongated rail structure comprises: a first rope guiding portion located adjacent the first keder groove and configured for guiding a pull rope connected to the first tarpaulin mounted in the first keder groove; a second rope guiding portion located adjacent the second keder groove and configured for guiding a pull rope connected to a second tarpaulin mounted in the second keder groove; a third rope guiding portion located adjacent the third keder groove and configured for guiding a pull rope connected to a fifth tarpaulin mounted in the third keder groove; and a fourth rope guiding portion located adjacent the fourth keder groove and configured for guiding a pull rope connected to a sixth tarpaulin mounted in the fourth keder groove.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated rail structure comprises: a plurality of individual rope guiding members located spaced apart on an outer side of the first elongated rail structure; and a plurality of individual rope guiding members located spaced apart on an inner side of the first elongated rail structure. Having rope guiding members located on both the inner and outer side of the roof support beam provide improved flexibility in terms of design and implementation of the keder roof system. For example, having tarpaulins mounted on both inner and outer side of roof support beam enables improved thermal insulation.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second elongated rail structure comprises: a plurality of individual rope guiding members located spaced apart on an outer side of the second elongated rail structure; and a plurality of individual rope guiding members located spaced apart on an inner side of the second elongated rail structure.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rope guiding structure of the first and/or second elongated rail structure comprises a separate rope guiding passage for each keder groove of said first and/or second elongated rail structure. Thereby, the risk for interference between different pull ropes is reduced.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rope guiding structure of the first and/or second elongated rail structure comprises a separate rope guiding passage for each keder groove of said first and/or second elongated rail structure, and at least one rope guiding passage is dimensioned for being able to hold and guide two pull ropes simultaneously. As a result, two tarpaulins may be mounted in the same keder groove, thereby further increasing the flexibility and design options of the keder roof system.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first and/or second shuttle arrangement comprises a first part and a second part, wherein the first part is fastened to the first tarpaulin and the second part, which includes the rope attachment structure, is detachably fastenable to the first part. This provides improved flexibility for servicing and repair of for example the second part, and avoids the need to replace the complete tarpaulin.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first part of the first and/or second shuttle arrangement comprises two plates that are mutually fastened, and the two plates jointly clamps the first tarpaulin between said two plates. This provides a strong and reliable permanent connection between the plate and the tarpaulin, thereby eliminating the need to dismount the shuttle arrangement after installation, because the shuttle arrangement cannot fall down.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, at least one, specifically both, of the plates have a textured inner contact surface, specifically a wavy inner contact surface, facing the first tarpaulin. A textured, in particular wavy inner contact surface provides improved clamping effect of the plates.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the two plates of the first part of the first and/or second shuttle arrangement are mutually fastened via rivets or threaded members extending through the first tarpaulin. Thereby a reliable permanent connection of the plates to the tarpaulin is provided.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rope attachment structure of the first shuttle arrangement comprises a projection that is configured to be engaged in a hole of an end piece of a pull rope. This provides a simply and strong connection of the pull rope to the shuttle arrangement.
Similarly, when the keder roof system further comprises a second elongated rail structure, the rope attachment structure of the second shuttle arrangement comprises a projection that is configured to be engaged in a hole of an end piece of a pull rope.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the second part of the first and/or second shuttle arrangement is made of a planar material, specifically sheet metal such as sheet aluminium or sheet steel. This enables use of a small access opening to the rope guiding passage of the rope guiding structure, such that the risk that the pull rope becomes stuck or jammed in the access opening is reduced.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the second part of the first shuttle arrangement is attached to the first part of the first shuttle arrangement by means of threaded members.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second part of the second shuttle arrangement is attached to the first part of the second shuttle arrangement by means of threaded members.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the second part of the first shuttle arrangement may be selectively attached to any one of the two plates of the first part of the first shuttle arrangement. Thereby, the roof builder does not have to reposition the tarpaulin in the ground before installation, because the roof builder may simply attach the shuttle arrangement where needed.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second part of the second shuttle arrangement may be selectively attached to any one of the two plates of the first part of the second shuttle arrangement.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the at least one rope guiding member of the first elongated rail structure has a shape of a closed retainer defining a rope guiding passage through the at least one rope guiding member, wherein the closed retainer has an access opening along its circumference for enabling a portion of the first shuttle arrangement, specifically a portion of the second part of the shuttle arrangement, to extend into the rope guiding passage and to pass through the rope guiding structure. Thereby, the risk that the pull rope becomes stuck or jammed in the rope guiding structure is reduced.
Similarly, when the keder roof system further comprises a second elongated rail structure, the at least one rope guiding member of the second elongated rail structure has a shape of a closed retainer defining a rope guiding passage through the at least one rope guiding member, wherein the closed retainer has an access opening along its circumference for enabling a portion of the second shuttle arrangement, specifically a portion of the second part of the second shuttle arrangement, to extend into the rope guiding passage and to pass through the rope guiding structure.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the access opening of the closed retainer is dimensioned small enough for preventing escape of the pull rope from the rope guiding passage via the access opening. Thereby, the risk that the pull rope becomes stuck or jammed in the access opening is reduced.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first shuttle arrangement is fastened in a corner region of the first tarpaulin. This enables transfer of pull force from the pull rope to the keder chord.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second shuttle arrangement is fastened in a corner region of the first tarpaulin. Specifically, each of the first and second shuttle arrangements is fastened in a separate corner region of the first tarpaulin.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the method may further comprise: providing a second elongated rail structure having a first keder groove and a rope guiding structure, and providing the first tarpaulin with a second shuttle arrangement fastened to the first tarpaulin; arranging the first and second elongated rail structures spaced apart side by side and interconnecting the first and second elongated rail structures using brazing elements and/or ledgers for defining a rigid roof bay; installing a pull rope in the pull rope guiding structure of the second elongated rail structure and attaching the pull rope to a pull rope attachment structure of the second shuttle arrangement; wherein the step of assembling the first tarpaulin involves assembling the first tarpaulin on the first and second elongated rail structures by simultaneously pulling the pull ropes of the first and second shuttle arrangements for slidingly installing the first keder chord in the first keder groove of the first elongated rail structure and slidingly installing the second keder chord in the first keder groove of the second elongated rail structure, while holding and guiding the pull rope of the first shuttle arrangement along the first elongated rail structure at a location outside of the first keder groove by means of the rope guiding structure and holding and guiding the pull rope of the second shuttle arrangement along the second elongated rail structure at a location outside of the first keder groove by means of the rope guiding structure, and while a portion of the first shuttle arrangement passes through the rope guiding structure of the first elongated rail structure, and a portion of the second shuttle arrangement passes through the rope guiding structure of the second elongated rail structure.
In other words, the method for assembling a keder roof system comprises: providing first and second elongated rail structures, each having a first keder groove and a rope guiding structure; a first tarpaulin having a rectangular form with first and second opposite side edges, wherein the first tarpaulin has a first keder chord located along the first side edge and second keder chord located along the second side edge; a first shuttle arrangement fastened to the first tarpaulin; and a second shuttle arrangement fastened to the first tarpaulin; arranging the first and second elongated rail structures spaced apart side by side and interconnecting the first and second elongated rail structures using brazing elements and/or ledgers for defining a rigid roof bay; installing a pull rope in the pull rope guiding structure of the first elongated rail structure and attaching the pull rope to a pull rope attachment structure of the first shuttle arrangement, and installing a pull rope in the pull rope guiding structure of the second elongated rail structure and attaching the pull rope to a pull rope attachment structure of the second shuttle arrangement; and assembling the first tarpaulin on the first and second elongated rail structures by simultaneously pulling the pull ropes of the first and second shuttle arrangements for slidingly installing the first keder chord in the first keder groove of the first elongated rail structure and slidingly installing the second keder chord in the first keder groove of the second elongated rail structure, while holding and guiding the pull rope of the first shuttle arrangement along the first elongated rail structure at a location outside of the first keder groove by means of the rope guiding structure and holding and guiding the pull rope of the second shuttle arrangement along the second elongated rail structure at a location outside of the first keder groove by means of the rope guiding structure, and while a portion of the first shuttle arrangement passes through the rope guiding structure of the first elongated rail structure, and a portion of the second shuttle arrangement passes through the rope guiding structure of the second elongated rail structure.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated rail structure is composed of a plurality of elongated rail sections, and wherein the method further comprising: detachable fastening a plurality of elongated rail sections to a first roof support beam, in particular on a vertical upper or lower side of the first roof support beam, by means of a rail holder of the elongated rail section, and connecting the plurality of elongated rail sections end to end to jointly form the first elongated rail structure.
Similarly, when the keder roof system further comprises a second elongated rail structure, the second elongated rail structure is composed of a plurality of elongated rail sections, and wherein the method further comprising: detachable fastening a plurality of elongated rail sections to a second roof support beam, in particular on a vertical upper or lower side of the second roof support beam, by means of a rail holder of the elongated rail section, and connecting the plurality of elongated rail sections end to end to jointly form the second elongated rail structure.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the method further comprises: lifting and installing the assembled first roof support beam and first elongated rail structure onto an elevated support element of a substructure, wherein the step of lifting and installing is performed before the step of assembling the first tarpaulin on the first elongated rail structure, and in particular also after the step of installing a pull rope in the pull rope guiding structure of the first elongated rail structure.
Similarly, when the keder roof system further comprises a second elongated rail structure, the method further comprises: lifting and installing the assembled second roof support beam and second elongated rail structure onto an elevated support element of a substructure, wherein the step of lifting and installing is performed before the step of assembling the first tarpaulin on the second elongated rail structure, and in particular also after the step of installing a pull rope in the pull rope guiding structure of the second elongated rail structure.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the step of assembling the first tarpaulin on the first and/or second elongated rail structure is performed manually by a roof builder pulling the first and/or second pull rope while being located on the ground surface or on an elevated support surface of a substructure that carries the keder roof.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first shuttle arrangement, after the step of assembling the first tarpaulin on the first elongated rail structure, remains attached to the first tarpaulin at least as long as the keder roof system remains in an assembled and operational state.
In some example embodiments, that may be combined with any one or more of the above-described embodiments, a pull rope of the first or second shuttle arrangements, after the first tarpaulin has been assembled at a desired position on the first and/or second elongated rail structure, is secured to a substructure that carries the keder roof, or to an eave region of the keder roof system.
Further features and advantages of the invention will become apparent when studying the appended claims and the following description. The skilled person in the art realizes that different features of the present disclosure may be combined to create embodiments other than those explicitly described hereinabove and below, without departing from the scope of the present disclosure.
The keder roof system and corresponding method according to the disclosure will be described in detail in the following, with reference to the attached drawings, in which
Various aspects of the disclosure will hereinafter be described in conjunction with the appended drawings to illustrate and not to limit the disclosure, wherein like designations denote like elements, and variations of the described aspects are not restricted to the specifically shown embodiments, but are applicable on other variations of the disclosure.
In the example embodiment of
One of the primary purposes of the roof support structure 1 is to carry and hold the tarpaulins at a desired position, and being capable of withstanding loads transferred to the roof support structure 1 from the tarpaulins and caused by for example winds, snow loads, etc.
The finished keder roof system of
Neighbouring roof support beams 2-5, such as for example the first and second roof support beams 2, 3 jointly define a roof bay 10. Hence, the roof structure of
In the example embodiment of
In the example embodiment of
The roof has a modular structure, because the roof support structure 1 is made of a plurality of parts that are temporarily connected. For example, each of the roof support beams 2-5 may be made of a set of straight beam segments and a set of curved beam segments that are interconnected using for example clamping connection or positive locking. Similarly, the brazing elements and/or ledgers 6 are also separate parts that are temporarily connected to the roof support beams.
Consequently, depending on the construction of the modular framework, the roof free span width 7 and roof height 8 of the final roof may vary a lot. For example, the roof free span width 7 may be in the range of 5-50 metres, or more, and roof height, as measured from the vertical support surface at the first or second eave to the roof ridge, may be in the range of 0-30 metres, or more.
The roof support beams 2-5 may have various structure, composition and design. One particularly attractive design of the roof support beam 2-5 is in form of a lattice beam, lattice girder or truss beam, due to their high structural strength combined with low weigh. Such lattice girder or truss beams may be manufactured using steel, aluminium, or other types of metal. A lattice girder or truss beam, sometimes also referred to as an open web girder, typically comprises a top chord 59, a bottom chord 60 and a plurality of relatively straight structural elements 61 interconnecting the top and bottom chord and forming an essentially triangulated system.
In particular, by providing the roof support beam 2 in form of a lattice beam having top and bottom chords 59, 60 made from steel tubes with 48.3 mm outer diameter, according the European Standard EN 12810-1 for scaffolds products, the lattice beam is compatible for use as a scaffold part, i.e. for building façade scaffolds or the like. The centre to centre distance of the top and bottom chords 59, 60 of the lattice beam may for example be 500 mm for further improved compatibility with other parts of a scaffold system.
However, the roof support beam is not limited to these kind of support beams, and may alternatively have a more solid design and being made of fibre-reinforced polymeric material and/or or a concrete material, or the like.
With reference to
In addition, if for example the first keder groove of the first elongated rail structure 30 becomes damaged, it is not necessary to replace the entire roof support beam, but replacement of the first elongated rail structure 30 is sufficient.
Since the detachable first elongated rail structure 30 is carried by the rigid and load supporting first roof support beam 2, the first elongated rail structure 30 may be designed without any substantial requirement in terms of load capacity. In other words, the first elongated rail structure 30 may be designed with relatively low rigidity for saving weight and cost.
The first keder groove 31 may be integrally formed in the first elongated rail structure 30, for example by manufacturing the first elongated rail structure 30 as a cost-efficient aluminium profile in an aluminium extrusion process, or as a cost-efficient polymeric material profile in a polymeric material extrusion process.
The first elongated rail structure 30 may be made in one piece or composed of a plurality of parts and/or materials.
The first keder groove 31 clearly extends in parallel with the direction of elongation of the first rail structure 30.
According to some example embodiments, the first elongated rail structure 30 comprises a plurality of rail holders 35 for detachable fastening the first elongated rail structure 30 to the first roof support beam 2. The rail holder 35 may for example be fastened to, or integrally formed within, the first elongated rail structure 30, and configured for enabling quick and secure temporary attachment of the first elongated rail structure 30 to the first roof support beam 2 by a roof builder 23, 24. The quick and secure temporary attachment may for example be accomplished be means of a rail holder foot 9 that includes a clamping member or a positive locking device using for example pin and hole attachment.
However, the keder roof system according to the disclosure is not limited to a separate or detachable first elongated rail structure 30. In other words, in some example embodiments (not showed), first elongated rail structure 30 may be integrated in, or permanently attached to, the first roof support beam 2. For example, the first roof support beam 2 may include an integrally formed first keder groove 31, or the first elongated rail structure 30 having the first keder groove 31 may be permanently attached, for example by welding or the like, to the first roof support beam 2.
With reference to
Consequently, the first side edge 28 and the third side edge 36 meet at a first corner region 48 of the first tarpaulin 15, the second side edge 29 and the third side edge 36 meet at a second corner region 49 of the first tarpaulin 15, the first side edge 28 and the fourth side edge 37 meet at a third corner region 50 of the first tarpaulin 15, and the second side edge 29 and the fourth side edge 37 meet at a fourth corner region 51 of the first tarpaulin 15.
In other words, the rectangular circumference of the first tarpaulin 15 is thus defined by the first side edge 28, the third side edge 36, the second side edge 29, and the fourth side edge 37, in this order.
The pull ropes 14 may be made of various materials, such as for example jure rope or polypropylene rope or other type of plastic rope. The pull ropes 14 may have a diameter of about 10-30 mm for enabling good grip by a roof builder. Alternatively, a metal wire rope may be used, for example together with some type metal wire rope winding machine for enabling motorized pulling of the pull rope 14.
With reference to
The mounting of the first tarpaulin 15 on the first elongated rail structure 30 is for example performed by a roof builder inserting an end of the first keder chord 38 of the first tarpaulin 15 into an end of the first keder groove 31 of the first elongated rail structure 30. This may for example be performed manually. Thereafter, a pulling force is exerted on the first tarpaulin 15 for sliding the first keder chord 38 into the first keder groove 31 until a desired position is attained. The pulling force is for example exerted on the first tarpaulin 15 via the pull rope 14 of the first shuttle arrangement 40.
Specifically, a first keder chord 38 of the first tarpaulin 15 is mounted in a first keder groove 31 of the first elongated rail structure 30, and a first keder chord 38 of the second tarpaulin 16 is mounted in a second keder groove 32 of the first elongated rail structure 30. Furthermore, a first shuttle arrangement 40 is attached to the first tarpaulin 15 and a pull rope 14 attached to the first tarpaulin 15 via the first shuttle arrangement 40 is guided along the first elongated rail structure 30 by means of an interior part 21 of the rope guiding structure 52. Moreover, a first shuttle arrangement 40 is attached to the second tarpaulin 16 and a pull rope 14 attached to the second tarpaulin 16 via the first shuttle arrangement 40 is guided along the first elongated rail structure 30 by means of an exterior part 22 of the rope guiding structure 52.
In the example embodiments of the keder roof system that has a first elongated rail structure 30 with four keder grooves, the keder roof system according to the disclosure provides increased flexibility in terms of roof size, because one, two or three separate tarpaulins may be combined for covering a single roof bay region. For example,
More in detail,
The basic steps for mounting single-tarpaulin installation are schematically illustrated in
All required pull ropes are installed in the rope guiding structure 52 in connection with building the roof segments on the ground and before lifting, because pre-installed pull ropes 14 enables avoiding unnecessary climbing on the assembled roof support structure 1.
Mounting, lifting and installing the roof support structure 1 with its roof support beams 2-5 and brazing elements 6 is simplified when the tarpaulins are not yet installed because the wind-sensitivity is reduced, and climbing on the roof support structure for connecting neighbouring roof support beams is simpler before mounting the tarpaulins 15, 16.
With reference to
Thereafter, with reference to
More in detail,
Consequently, the first elongated rail structure 30 has, at each point along its length, an extension in a direction of elongation 76, a lateral direction 77 located in a plane of the intended roof and perpendicular to the direction of elongation, and a height direction 78 that is perpendicular to both the direction of elongation 76 and lateral direction 77, wherein the first elongated rail structure 30 has first and second keder grooves 31, 32 located on a first lateral side of the first elongated rail structure 30 and being mutually offset in the height direction 78, and wherein the first elongated rail structure 30 further has third and fourth keder grooves 33, 34 located on a second lateral side of the first elongated rail structure 30, opposite to the first lateral side, and being mutually offset in the height direction 78, such that two individual tarpaulins 15, 16 may be mounted on each lateral side of the first elongated rail structure 30 in an overlapping arrangement with each other.
Furthermore, a pull rope 14 of the first tarpaulin 15 is guided by a first rope guiding portion 53 located adjacent the first keder groove 31, a pull rope 14 of the second tarpaulin 16 is guided by a second rope guiding portion 54 located adjacent the second keder groove 32, a pull rope 14 of the third tarpaulin 17 is guided by a third rope guiding portion 55 located adjacent the third keder groove 33, and a pull rope 14 of the fourth tarpaulin 57 is guided by a fourth rope guiding portion 56 located adjacent the fourth keder groove 34.
The basic steps for mounting a dual-tarpaulin installation are schematically illustrated in
Thereafter, with reference to
Thereafter, with reference to
More in detail,
A pull rope 14 of the first tarpaulin 15 is guided by a first rope guiding portion 53 located adjacent the first keder groove 31, a pull rope 14 of the second tarpaulin 16 is guided by a second rope guiding portion 54 located adjacent the second keder groove 32, a pull rope 14 of the third tarpaulin 17 is guided by a third rope guiding portion 55 located adjacent the third keder groove 33, and a pull rope 14 of the fourth tarpaulin 57 is guided by a fourth rope guiding portion 56 located adjacent the fourth keder groove 34.
Said further tarpaulin 58 is not shown in the sectional view of
The basic steps for mounting a triple-tarpaulin installation are schematically illustrated in
Thereafter, the ends of the first and second keder chords 38, 39 of the first tarpaulin 15 are inserted in appropriate keder grooves 31-34 of the first and second elongated rail structures 30, 62, and roof builders 23, 24 located at the second eave region 19 may manually pull the pull ropes 14 connected with the first and second shuttle arrangements 40, 41 for mounting the first tarpaulin 15 until it covers a portion of the first roof bay region 10. In
Thereafter, with reference to
Thereafter, with reference to
The length of the first, second and further tarpaulins 15, 16, 58 may be selected according to the circumstances and may for example be equal, or different, thereby providing the roof builders with large flexibility in terms of roof construction.
With reference to for example
Others said, the rope guiding structure 52 is arranged for preventing the pull rope 14, 59 from escaping from the rope guiding structure 52, and thus preventing the pull rope 14, 59 from becoming displaced from the first elongated rail structure 30, because this will potentially hinder a smooth and low-friction sliding motion of the keder chord in the associated keder groove.
Aligning the pull rope 14, 59 with the first elongated rail structure 30 generally results in smooth and low-friction sliding motion of the keder chord in the associated keder groove, because this set-up does not incur any lateral force in the keder chord, and thus no additional friction force between the keder chord in the associated keder groove.
Others said, without the rope guiding structure 52 arranged on the first elongated rail structure 30, there is a significant risk that a pull angle of the pull rope 14, 59 deviates significantly from the direction of elongation of the first elongated rail structure 30 at the location of the first shuttle arrangement 40. This problem may also worsen in embodiments where the first elongated rail is vertically displaced from frame, because frame support become positioned further away from rail
Furthermore, without the rope guiding structure 52 arranged on the first elongated rail structure 30, the pull rope may more easily get stuck in the roof support beam or roof support structure 1, and the pull rope may more easily become displaced to an inconvenient position during lifting and mounting of roof support beam, and the pull ropes may become mixed up with each other more easily due to lack of any specific position.
Furthermore, when relying on an underlying roof support structure, such as a brazing element, for guidance of the pull rope, it is generally necessary to mount/dismount the tarpaulins in a certain order, namely outer tarpaulin first during mounting and inner tarpaulin first when dismounting, because if the firstly mounted tarpaulin is mounted in the inner keder groove, this tarpaulin may be forming a barrier between the outer keder groove and the pull rope 14.
In addition, when an elongated rail structure is mounted on an underside of the roof support beam, as schematically showed in
All these problems are solved by providing a rope guiding structure 52 arranged on the first elongated rail structure 30, because thereby to the location of the pull ropes are reliably controlled for avoiding any problems with the pull ropes during mounting/dismounting and ensuring a smooth and low-friction sliding motion of the keder chord in the associated keder groove.
Since for example the first shuttle arrangement is fastened to a pull rope, not only said pull rope will pass through the rope guiding structure 52 of the first elongated rail structure, but also a part of the first shuttle arrangement. Consequently, the rope guiding structure 52 cannot have a completely closed circumference, but a relatively small passage may be available for enabling a part of the first shuttle arrangement to pass through a nearly closed circumference of the rope guiding structure 52.
Consequently, with reference to for example
Moreover, with reference to for example
The first and second elongated rail structures 30, 62 may have similar or identical design, i.e. similar or identical type and number of keder grooves 31-34, similar or identical type of rope guiding structure 52, such that the same type of tarpaulins may be selectively installed in the first or second elongated rail structures 30, 62.
This type of double installation of tarpaulins both above and below the first roof support beam 2 may be useful for improved heat insulation, or the like. Furthermore, the keder roof system may be built with only the second elongated rail structure 62, i.e. only the lower rail structure 62, if desired.
In other words, the first roof support beam 2 may be composed of a plurality of support beam elements 63 that may have various forms, such as straight element and curved elements, and the desired first roof support beam 2 may thus be built by assembling and mutually fastening an appropriate set of support beam elements 63.
Similarly, the first elongated rail structure 30 is composed of a plurality of elongated rail sections 64 that are connected end to end, in continuation with each other, to jointly form the first elongated rail structure 30. Likewise, the second elongated rail structure 62 is also composed of a plurality of elongated rail sections 64 that are connected end to end, [in continuation with each other, to jointly form the second elongated rail structure 62.
In the example embodiment of
The straight elongated rail sections 64 of the first and second elongated rail structures 30, 62 may be identical, such that the straight elongated rail sections 64 can be fastened to both on the upper and lower side of the first roof support beam 2.
The curved elongated rail sections 64 of the first and second elongated rail structures 30, 62 are different because the rail holders 35 for attaching the curved elongated rail sections 64 to the first roof support beam 2 are located on opposite sides.
At least one elongated rail section 64 of the first and/or second elongated rail structures 30, 62 comprises a rail holder 35, in particular two, three or four rail holders 35, for detachable fastening the elongated rail section 64 to a first roof support beam 2, in particular on a vertical upper or lower side of the first roof support beam 2.
With reference to
In the example embodiment of
The locking pins 68 may for example have a slightly conical shape, at least over a certain length of the locking pin, such that the conical part of the locking pins may interact with the locking hole or recess 67 for ensuring improved stability and eliminated play.
The reliable and accurate angular positioning of the foot 9 on the first roof support beam 2 provided by the locking pins 68 when engaging within the locking holes 67 is advantageous, because this ensures that neighbouring rail holders 35 are mounted in parallel with each other. As a result, a distance between keder groves of neighbouring first and second elongated rail structures 30, 62 is constant and within relatively tight tolerances over the length of the first and second elongated rail structures 30, 62, such that the tarpaulins are more easily mounted and dismounted within said keder grooves. Others said, when neighbouring rail holders 35 are not mounted in parallel with each other, i.e. slightly inclines with respect to each other, a distance between keder groves of neighbouring first and second elongated rail structures 30, 62 is either too small or too large, thereby rendering mounting/dismounting of the tarpaulins more difficult.
A further example embodiment of the foot 9 is described below with reference to schematically illustrated
Upon pushing the foot towards the roof support beam 2, as depicted by foot motion arrow 73, the locking pins 68 are temporarily automatically retracted to the retracted position. Specifically, the pushing causes the locking pins 68 to automatically become temporarily retracted due to contact with the external rounded surface of the roof support beam 2, as shown in
Upon further motion of the foot 9 towards the roof support beam 2, the contact surface 66 of the foot 9 comes into contact with the roof support beam 2 and the locking pins 68 may pushed into the locking hole 67 by the mechanical spring devices 70, such that the foot 9 and rail holder 35 becomes firmly and reliably connected to the roof support beam 2, as showed in
The front end 71 of the locking pins 68 may have a slightly conical shape for ensuring improved stability and eliminated play.
In other words, the foot 9 of the rail holder 35 may in some example embodiments comprise at least two spring-loaded pins 68 for detachable engagement with corresponding holes 67 located in the first roof support beam 2, for safely and reliably connecting the rail holder 35 and associated first elongated rail structure 30 to the first roof support beam 2.
The snap-fit foot 9 of
According to an alternative example embodiment (not showed), the foot 9 of the rail holder 35 may comprise at least a clamping mechanism for clamping attachment of the foot 9 to the first roof support beam 2. The clamping mechanism may for example be accomplished using a threaded member or the like.
The rail holder 35 may comprise an elongated beam having first and second ends, wherein the first end of the beam is provided with a rail attachment interface configured for enabling permanent or detachable rigid connection with the first elongated rail structure 30, and wherein the second end 46 of the beam is provided with the foot 9 for enabling detachable connection with the first roof support beam 2.
With reference to
With reference to
With reference to
With reference to
With reference to
With reference to
More in detail, the first part 81 may be permanently fastened to the first tarpaulin 15 and the second part 82, for example by means of one or more rivets that extend through the first tarpaulin 15, or by gluing.
With reference to
With reference to
With reference to
With reference to
The hole 87 of the end piece 88 may have an oblong shape oriented in a first direction, and the projection 86 of the second part 82 may be T-shaped with an oblong top plate 46 oriented in a direction perpendicular to the first direction, when being arranged in the hole 87 during mounting of a tarpaulin 15. Disconnection of the end piece 88 is accomplished by turning the end piece 90 degrees, such that the oblong shape of the hole 87 of the end piece 88 is aligned with the oblong top plate 46 of the projection 86, because thereby the parts may be disconnected. Before turning of the end piece 88, disconnection is impossible due to interference between the oblong shape of the hole 87 of the end piece 88 is non-aligned with the oblong top plate 46 of the projection 86. This arrangement enables a quick and user-friendly connection/disconnection of the pull rope 14 to the first shuttle arrangement 40, while also providing a relatively reliable connection during normal use of the shuttle arrangement 40 and pull rope 14.
With reference to
With reference to
With reference to
With reference to
For example, with reference to
With reference to for example
According to some example embodiments of the present disclosure, the access opening 80 of the closed retainer is dimensioned small enough for preventing escape of the pull rope 14 from the rope guiding passage 79 via the access opening 80.
By providing the rail holders 35, in particular the foot 9 of the rails holders 35, with attachment interface 93 for connection with available quick-coupling brazing elements and/or ledgers 6, the roof support structure 1 is provided with increased options for quickly add further structural strength to the roof support structure, if needed, by simply installing some additional quick-coupling brazing elements and/or ledgers 6 between neighbouring first and second roof support beams 2, 3.
In the example of
The attachment interface 93 of each foot 9 may be provided in form a bracket 95 provided on each side of the foot 9 for enabling attachment of a lattice guard rail 6 to neighbouring roof support beams on both sides. Furthermore, the attachment interface 93 of each foot 9 may be provided with a flat support surface 94 on each side of the foot 9 for engagement with the four hook-shaped attachments 92, thereby providing further improved stability of the finished roof support structure 1. The bracket 95 and flat support surface 94 of the foot 9 is also shows in
The rail holder 35 may in some example embodiments be made of a separate foot 9 that is detachably connected to a separate elongated beam to form the rail holder 35.
This design enabling use of the foot alone as a coupling member for connecting brazing elements or scaffold parts to the roof support beam, by means of the attachment interface 93 of the foot 9.
With reference to
The method further comprises a second step S2 of installing a pull rope in the pull rope guiding structure of the first elongated rail structure and attaching the pull rope to a pull rope attachment structure of the first shuttle arrangement.
The method further comprises a third step S3 of assembling the first tarpaulin on the first elongated rail structure by pulling the pull rope for slidingly installing the first keder chord in the first keder groove, while holding and guiding the pull rope along the first elongated rail structure at a location outside of the first keder groove by means of the rope guiding structure, and while a portion of the first shuttle arrangement passes through the rope guiding structure of the first elongated rail structure.
With reference to
The method further comprises a second step S20 of installing a pull rope 14 in the pull rope guiding structure 52 of the first elongated rail structure 30 and attaching the pull rope 14 to a pull rope attachment structure 83 of the first shuttle arrangement 40, and installing a pull rope 14 in the pull rope guiding structure 52 of the second elongated rail structure 62 and attaching the pull rope 14 to a pull rope attachment structure 83 of the second shuttle arrangement.
The method further comprises a third step S30 of assembling the first tarpaulin 15 on the first and second elongated rail structures 30, 62 by simultaneously pulling the pull ropes 14 of the first and second shuttle arrangements 40, 41 for slidingly installing the first keder chord 38 in the first keder groove 31 of the first elongated rail structure 30 and slidingly installing the second keder chord 39 in the first keder groove 31 of the second elongated rail structure 62, while holding and guiding the pull rope 14 of the first shuttle arrangement 40 along the first elongated rail structure 30 at a location outside of the first keder groove 31 by means of the rope guiding structure 52 of the first elongated rail structure 30, and holding and guiding the pull rope 14 of the second shuttle arrangement 41 along the second elongated rail structure 62 at a location outside of the first keder groove 31 by means of the rope guiding structure 52 of the second elongated rail structure 62, while a portion of the first shuttle arrangement 40 passes through the rope guiding structure 52 of the first elongated rail structure 30, and a portion of the second shuttle arrangement 41 passes through the rope guiding structure 52 of the second elongated rail structure 62.
It will be appreciated that the above description is merely exemplary in nature and is not intended to limit the present disclosure, its application or uses. While specific examples have been described in the specification and illustrated in the drawings, it will be understood by those of ordinary skill in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure as defined in the claims. Furthermore, modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof.
Therefore, it is intended that the present disclosure not be limited to the particular examples illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out the teachings of the present disclosure, but that the scope of the present disclosure will include any embodiments falling within the foregoing description and the appended claims. Reference signs mentioned in the claims should not be seen as limiting the extent of the matter protected by the claims, and their sole function is to make claims easier to understand.
The term “tarpaulin” used herein refers to a sheet fabric, such as for example a heavy-duty waterproof or non-waterproof cloth or tarp or similar type of piece of sheet material suitable for being used for protecting or covering of exposed objects or areas. The tarpaulin may be made of plastic material, such as fibre-reinforced polymeric material, such as PVC, polyethylene, polyester, etc. Alternatively, the tarpaulin may be made of natural material, such as canvas, cotton, or the like.
The example embodiments of the first and second elongated rail structures 30, 62 shown in the figures have four keder grooves 31-34, but the first and second elongated rail structures 30,62 are not limited to this design, but may alternatively have for example two keder grooves or six keder grooves, or the like. Furthermore, the order of the steps of the method claims should not be interpreted as strictly limiting, but merely one option for performing the method, and the method steps may thus be arranged in another order.
Claims
1. A keder roof system comprising:
- a first elongated rail structure (30) with a first keder groove (31),
- a first tarpaulin (15) having a rectangular form with first and second opposite side edges, wherein the first tarpaulin (15) has a first keder chord (38) located along the first side edge and second keder chord (39) located along the second side edge, and wherein the first keder chord (38) is configured for being inserted into, and slidingly moveable within, the first keder groove (31) of the first elongated rail structure (30),
- a first shuttle arrangement (40) fastened to the first tarpaulin (15), wherein the first shuttle arrangement (40) has a rope attachment structure (83),
- a pull rope (14) configured for being attached to the rope attachment structure (83) of the first shuttle arrangement (40),
- wherein the first elongated rail structure (30) comprises a rope guiding structure (52) configured for holding and guiding the pull rope (14) along the first elongated rail structure (30) at a location outside of the first keder groove (31), and
- wherein the pull rope (14) and a portion of the first shuttle arrangement (40) are configured to pass through the rope guiding structure (52) of the first elongated rail structure (30) when the first tarpaulin (15) is being mounted on the first elongated rail structure (30).
2. The keder roof system according to claim 1, further comprising:
- a second elongated rail structure (62) with a first keder groove (31), wherein the second elongated rail structure (62) is configured for being located next to the first elongated rail structure (30) for defining a roof bay area, and wherein the second keder chord (39) is configured for being inserted into, and slidingly moveable within, the first keder groove (31) of the second elongated rail structure (62),
- a second shuttle arrangement (41) fastened to the first tarpaulin (15), wherein the second shuttle arrangement (41) has a rope attachment structure (83),
- a pull rope (14) configured for being attached to the rope attachment structure (83) of the second shuttle arrangement (41),
- wherein the second elongated rail structure (62) comprises a rope guiding structure (52) configured for holding and guiding the pull rope (14) along the second elongated rail structure (62) at a location outside of the first keder groove (31),
- wherein the pull rope (14) and a portion of the second shuttle arrangement (41) are configured to pass through the rope guiding structure (52) of the second elongated rail structure (62) when the first tarpaulin (15) is being mounted on the first and second elongated rail structures (30, 62), and
- wherein the keder roof system is configured for simultaneous pulling of the pull ropes (14) of the first and second shuttle arrangements (40, 41) for slidingly installing the first tarpaulin (15) on the first and second elongated rail structures (30, 62).
3. The keder roof system according to any of the preceding claims, wherein the first elongated rail structure (30) is composed of a plurality of elongated rail sections (64) connected end to end to jointly form the first elongated rail structure (30).
4. The keder roof system according to claim 3, wherein at least one elongated rail section (64) of the first elongated rail structure (30) comprises a rail holder (35), in particular two, three or four rail holders (35), for detachable fastening of the elongated rail section (64) to a first roof support beam, in particular on a vertical upper or lower side of the first roof support beam (2).
5. The keder roof system according to claim 4, wherein the rail holder (35) has a foot (9) for detachable fastening of the elongated rail section (64) on the first roof support beam (2), and wherein a contact surface of the foot is located spaced apart from the first keder groove (31) with a distance of at least 10 cm, specifically at least 25 cm, and more specifically within a range of 10-150 cm.
6. The keder roof system according to any of the preceding claims 4 to 5, wherein the rail holder (35) has a foot (9) for detachable fastening of the elongated rail section (64) on the first roof support beam (2), wherein the foot (9) of the rail holder (35) comprises:
- a clamping mechanism for clamping attachment of the foot (9) to the first roof support beam (2), or
- at least two spring-loaded pins (68) for detachable engagement with corresponding holes (67) in the first roof support beam (2).
7. The keder roof system according to any of the preceding claims, wherein the first elongated rail structure (30) is integrally formed in a first roof support beam (2).
8. The keder roof system according to any of the preceding claims, wherein the rope guiding structure (52) of the first elongated rail structure (30) comprises at least one individual rope guiding member (74, 75) located on an elongated rail section (64), in particular two, three, four or five individual rope guiding members (74, 75) located longitudinally spaced apart along the elongated rail structure (30).
9. The keder roof system according to claim 8, wherein the first elongated rail structure (30) is composed of at least one curved elongated rail section (64) and at least one straight elongated rail section (64), wherein the least one individual rope guiding member (74, 75) is located on the at least one curved elongated rail section (64), and wherein at least one, specifically all, straight elongated rail section (64) is free from said rope guiding structure (52).
10. The keder roof system according to any of the preceding claims, wherein the first elongated rail structure (30), at each point along its length, has an extension in a direction of elongation, a lateral direction located in a plane of the intended roof and perpendicular to the direction of elongation, and a height direction that is perpendicular to both the direction of elongation and lateral direction, wherein the first elongated rail structure (30) has first and second keder grooves (31, 32) located on a first lateral side of the first elongated rail structure (30) and being mutually offset in the height direction, and wherein the first elongated rail structure (30) further has third and fourth keder grooves (33, 34) located on a second lateral side of the first elongated rail structure (30), opposite to the first lateral side, and being mutually offset in the height direction, such that two individual tarpaulins (15, 16) may be mounted on each lateral side of the first elongated rail structure (30) in an overlapping arrangement.
11. The keder roof system according to claim 10, wherein the rope guiding structure (52) of the first elongated rail structure (30) comprises:
- a first rope guiding portion located adjacent the first keder groove (31) and configured for guiding a pull rope (14) connected to a first tarpaulin (15) mounted in the first keder groove (31),
- a second rope guiding portion located adjacent the second keder groove (32) and configured for guiding a pull rope (14) connected to a second tarpaulin (16) mounted in the second keder groove (32),
- a third rope guiding portion located adjacent the third keder groove (33) and configured for guiding a pull rope (14) connected to a third tarpaulin (17) mounted in the third keder groove (33), and
- a fourth rope guiding portion located adjacent the fourth keder groove (34) and configured for guiding a pull rope (14) connected to a fourth tarpaulin (57) mounted in the fourth keder groove (34).
12. The keder roof system according to any of the preceding claims, wherein the first elongated rail structure (30) comprises:
- a plurality of individual rope guiding members (74, 75) located spaced apart on an outer side of the first elongated rail structure (30); and
- a plurality of individual rope guiding members (74, 75) located spaced apart on an inner side of the first elongated rail structure (30).
13. The keder roof system according to any of the preceding claims, wherein the rope guiding structure (52) of the first elongated rail structure (30) comprises a separate rope guiding passage (79) for each keder groove (31-34) of said first elongated rail structure (30).
14. The keder roof system according to any of the preceding claims, wherein the rope guiding structure (52) of the first elongated rail structure (30) comprises a separate rope guiding passage (79) for each keder groove (31-34) of said first elongated rail structure (30), and wherein at least one rope guiding passage (79) is dimensioned for being able to hold and guide two pull ropes (14) simultaneously.
15. The keder roof system according to any of the preceding claims, the first shuttle arrangement (40) comprises a first part (81) and a second part (82), wherein the first part (81) is fastened to the first tarpaulin (15), and wherein the second part (82), which includes the rope attachment structure (83), is detachably fastenable to the first part (81).
16. The keder roof system according to claim 15, wherein the first part (81) of the first shuttle arrangement (40) comprises two plates (84, 85) that are mutually fastened, and the two plates (84, 85) jointly clamps the first tarpaulin (15) between said two plates (84, 85).
17. The keder roof system according to claim 16, wherein at least one, specifically both, of the plates (84, 85) have a textured inner contact surface, specifically a wavy inner contact surface, facing the first tarpaulin (15).
18. The keder roof system according to claim 16 or 17, wherein the two plates (84, 85) of the first part of the first shuttle arrangement (40) are mutually fastened via rivets or threaded members extending through the first tarpaulin (15).
19. The keder roof system according to any of the preceding claims, wherein the rope attachment structure (83) of the first shuttle arrangement (40) comprises:
- a projection (86) that is configured to be engaged in a hole (87) of an end piece (88) of the pull rope (14), or
- a hole that is configured to be engaged by a projection of an end piece (88) of the pull rope (14).
20. The keder roof system according to any of the preceding claims 15 to 19, wherein the second part (82) of the first shuttle arrangement (40) is made of a planar material, specifically sheet metal such as sheet aluminium or sheet steel.
21. The keder roof system according to any of the preceding claims 15 to 20, wherein the second part (82) of the first shuttle arrangement (40) is attached to the first part (81) of the first shuttle arrangement (40) by means of threaded members (89).
22. The keder roof system according to any of the preceding claims 16 to 21, wherein the second part (82) of the first shuttle arrangement (40) may be selectively attached to any one of the two plates (84, 85) of the first part of the first shuttle arrangement (40).
23. The keder roof system according to any of the preceding claims 8 to 22, wherein the at least one rope guiding member (74, 75) of the first elongated rail structure (30) has a shape of a closed retainer defining a rope guiding passage (79) through the at least one rope guiding member, wherein the closed retainer has an access opening along (80) its circumference for enabling a portion of the first shuttle arrangement (40), specifically a portion of the second part (82) of the shuttle arrangement, to extend into the rope guiding passage (79) and to pass through the rope guiding structure (52).
24. The keder roof system according to claim 23, wherein the access opening (80) of the closed retainer is dimensioned small enough for preventing escape of the pull rope (14) from the rope guiding passage via the access opening.
25. The keder roof system according to any of the preceding claims, wherein the first shuttle arrangement (40) is fastened in a corner region (48-51) of the first tarpaulin (15).
26. A method for assembling a keder roof system, the method comprising:
- providing a first elongated rail structure (30) having a first keder groove (31) and a rope guiding structure (52); a first tarpaulin (15) having a rectangular form with first and second opposite side edges, wherein the first tarpaulin (15) has a first keder chord (38) located along the first side edge and second keder chord (39) located along the second side edge; and a first shuttle arrangement (40) fastened to the first tarpaulin (15);
- installing a pull rope (14) in the pull rope guiding structure (52) of the first elongated rail structure (30) and attaching the pull rope (14) to a pull rope attachment structure (83) of the first shuttle arrangement (40);
- assembling the first tarpaulin (15) on the first elongated rail structure (30) by pulling the pull rope (14) for slidingly installing the first keder chord (38) in the first keder groove (31), while holding and guiding the pull rope (14) along the first elongated rail structure (30) at a location outside of the first keder groove (31) by means of the rope guiding structure (52), and while a portion of the first shuttle arrangement (40) passes through the rope guiding structure (52) of the first elongated rail structure (30).
27. The method according to claim 26, further comprising:
- providing a second elongated rail structure (62) having a first keder groove (31) and a rope guiding structure (52), and providing a second shuttle arrangement (41) fastened to the first tarpaulin (15);
- arranging the first and second elongated rail structures (30, 62) spaced apart side by side and interconnecting the first and second elongated rail structures (30, 62) using brazing elements and/or ledgers (6) for defining a rigid roof bay,
- installing a pull rope (14) in the pull rope guiding structure (52) of the second elongated rail structure (62) and attaching the pull rope (14) to a pull rope attachment structure (83) of the second shuttle arrangement;
- wherein the step of assembling the first tarpaulin (15) involves assembling the first tarpaulin (15) on the first and second elongated rail structures (30, 62) by simultaneously pulling the pull ropes (14) of the first and second shuttle arrangements (40, 41) for slidingly installing the first keder chord (38) in the first keder groove (31) of the first elongated rail structure (30) and slidingly installing the second keder chord (39) in the first keder groove (31) of the second elongated rail structure (62), while holding and guiding the pull rope (14) of the first shuttle arrangement (40) along the first elongated rail structure (30) at a location outside of the first keder groove (31) by means of the rope guiding structure (52) and holding and guiding the pull rope (14) of the second shuttle arrangement (41) along the second elongated rail structure (62) at a location outside of the first keder groove (31) by means of the rope guiding structure (52), and while a portion of the first shuttle arrangement (40) passes through the rope guiding structure (52) of the first elongated rail structure (30), and a portion of the second shuttle arrangement (41) passes through the rope guiding structure (52) of the second elongated rail structure (62).
28. The method according to any of the preceding claim 26 or 27, wherein the first elongated rail structure (30) is composed of a plurality of elongated rail sections (64), and wherein the method further comprising:
- detachable fastening a plurality of elongated rail sections (64) to a first roof support beam (2), in particular on a vertical upper or lower side of the first roof support beam, by means of a rail holder (35) of the elongated rail section, and
- connecting the plurality of elongated rail sections (64) end to end to jointly form the first elongated rail structure (30).
29. The method according to any of the preceding claims 26 to 28, wherein the method further comprises:
- lifting and installing the assembled first roof support beam (2) and first elongated rail structure (30) onto an elevated support element of a substructure, wherein the step of lifting and installing is performed before the step of assembling the first tarpaulin (15) on the first elongated rail structure (30), and in particular also after the step of installing a pull rope (14) in the pull rope guiding structure (52) of the first elongated rail structure (30).
30. The method according to any of the preceding claims 26 to 29, wherein the step of assembling the first tarpaulin (15) on the first elongated rail structure (30) is performed manually by a roof builder (23, 24) pulling the pull rope (14) while being located on the ground surface (47) or on an elevated support surface (47) of a substructure that carries the keder roof.
31. The method according to any of the preceding claims 26 to 30, wherein the first shuttle arrangement (40), after the step of assembling the first tarpaulin (15) on the first elongated rail structure (30), remains attached to the first tarpaulin (15) at least as long as the keder roof system remains in an assembled and operational state.
32. The method according to any of the preceding claims 26 to 31, wherein the pull rope (14), after the first tarpaulin (15) has been assembled at a desired position on the first elongated rail structure (30), is secured to a substructure that carries the keder roof, or to an eave region of the keder roof system.
Type: Application
Filed: May 24, 2023
Publication Date: Jul 16, 2026
Inventor: Harry Wallther (Hindås)
Application Number: 18/866,975
