Spacer and Associated Apparatus and Method
The spacer 1 defines a body (2) having two opposed sides (3) and (4). The body (2) defines a separation distance between the opposed sides (3) and (4) for use as a spacer intermediate at least two concrete containment panels (5) and (6). Various preferred embodiments have separation distances suitable for forming walls having concrete thicknesses of 50 mm, 120 mm or 150 mm, for example. Each of the opposed sides (3) and (4) include fastening means (7) and (8) adapted for fastening of a cladding panel (16) disposed external to the concrete containment panels (5) and (6), as shown for example in FIGS. (32) and (33). To counter bulging of the concrete containment panels (5) due to the weight of the concrete a brace (49) adapted for fastening engagement with the spacers (1) may be used, as shown in FIGS. (50) to (55). The brace 49 includes an abutment member (50) for abutment with the concrete containment panels (5). A plurality of fastening means (51) are disposed on the abutment member (50) for fastening engagement with spacers (1). The fastening means (51) each define a leading portion (52) and a trailing portion (53). As shown for example in FIG. (50), the leading portion (52) has a width greater than a width of the trailing portion (53). A pair of opposed lips (54) and (55) are disposed on the leading portion (52). To fasten the abutment member (50) of the brace (49) to the spacers (1), the leading portion (52) of the fastening means (51) is inserted between a pair of projections {9 and 10} on the spacer. Once the lips (54) and (55) clear the projections (9) and (10), the projections resiliently snap toward their resting position and engage the trailing portion (53) so as to fasten the abutment member (50) to the spacer (1). This is repeated with other spacers (1) as required until the abutment member (50) provides the desired level of support to counter bulging of the concrete containment panels (5).
The present invention relates to a spacer and associated concrete containment panels, cladding panels, braces and methods of use thereof. Preferred embodiments of the invention are typically used in the construction field, for example in relation to concrete formwork construction methods.
BACKGROUNDThe discussion of the prior art within this specification is not, and should not be taken as, an admission of the extent of common general knowledge in the field of the invention. Rather, the discussion of the prior art is provided merely to assist the addressee to understand the invention and is included without prejudice.
Existing techniques for in-situ construction of concrete structures typically require erection of formwork from generic materials such as plywood. This can be labour intensive and therefore costly. Additionally, input from skilled tradespeople is typically required, both to erect the formwork and to apply finishes such as rendering, gyprock, tiles or other cladding materials to the resultant concrete structures. Improvements to the efficiency of any of these processes are likely to be highly advantageous within the notoriously competitive construction industry.
SUMMARY OF THE INVENTIONIt is an object of the invention to overcome, or substantially ameliorate, at least one of the disadvantages of the prior art, or to provide a useful alternative.
According to a first aspect of the invention there is provided a spacer defining a body having two opposed sides, said body defining a separation distance between said opposed sides for use as a spacer intermediate at least two concrete containment panels, at least one of said sides including fastening means adapted for fastening of at least one cladding panel disposed external to at least one of said concrete containment panels.
In one preferred embodiment of the spacer, the fastening means is a snap lockable connector including at least a first projection disposed on one of the spacer or the cladding panel, the projection being resiliently biased for interlocking engagement with a corresponding formation provided upon the other of the spacer or the cladding panel. This embodiment includes a second projection opposed to the first projection, the second projection being resiliently biased for interlocking engagement with a corresponding formation provided upon the other of the spacer or the cladding panel. The corresponding formation of this preferred embodiment has a cross sectional profile defining a leading portion having a width greater than a width between respective ends of the first and second projections, the cross sectional profile further defining a trailing portion having a width less than the width of the leading portion.
In another preferred embodiment of the spacer the snap lockable connector includes a first pair of opposed projections disposed adjacent a second pair of opposed projections on one of the spacer or the cladding panel, each of the projections being resiliently biased for interlocking engagement with one or more corresponding formations provided upon the other of the spacer or the cladding panel. Preferably the first and second pair of opposed projections are disposed on one or both of the opposed sides, the first and second pairs of projections being respectively fastenable with a first corresponding formation disposed on a first cladding panel and a second corresponding formation disposed on a second cladding panel.
In another preferred embodiment of the spacer the fastener is an interference fit fastener.
In yet another preferred embodiment of the spacer the fastener includes:
-
- a slot disposed in one of the spacer or the cladding panel, the slot defining at least one detent; and
- an elongate member disposed in the other of the spacer or the cladding panel, the elongate member including a formation adapted for engagement with the detent.
Preferably the fastening means is adapted for press fit fastening of the cladding panel to the spacer.
Also preferably the fastening means is adapted for fastening of the spacer to the cladding panel through an opening provided within at least one of said concrete containment panels.
In a preferred embodiment of the spacer the fastening means includes at least one tongue disposed on one of the spacer or cladding panel and at least one groove disposed on the other of the spacer or cladding panel. Preferably a T shaped member defines a pair of opposed tongues, each of the tongues being separately engageable with corresponding grooves provided upon two adjacent cladding panels.
In another preferred embodiment of the spacer the fastening means includes a lug removably attachable to the at least one opposed side, the lug including cladding panel retaining formations. Preferably the lug is T shaped and includes a handle for removal of the lug upon adhesion of the cladding panel to the at least one opposed side and/or to the concrete containment panel.
In yet another preferred embodiment of the spacer the fastener includes a connection component fastenable to the at least one side, the connection component being slidably matable with the cladding panel.
Preferably the cladding panel is fastenable to the at least one opposed side at any one of a plurality of selectable connection points lying on the cladding panel. In such an embodiment a groove is defined by the cladding panel and the connection point is selected from a locus of points defined by said groove.
A further preferred embodiment of the spacer includes a planar surface disposed at the at least one side, the concrete containment panel being adapted for engagement with the planar surface. Preferably the concrete containment panel includes a slot adapted to receive the planar surface.
In a preferred embodiment of the spacer the body includes at least one webbing member extending intermediate said opposed sides. In this preferred embodiment the body also includes at least one positioning formation adapted for positioning of an elongate member extending transverse to the spacer body, for example a plumbing pipe or conduit, a utility cable or the like.
Preferably the body includes at least one transverse projection disposed such that, in use, an end of the projection abuts, or is adjacent to, the concrete containment panel.
A preferred embodiment of the spacer consists of at least two interengagable components. Preferably this embodiment of the spacer consists of two click-lockingly interengagable components, each component respectively defining one of the opposed sides.
According to a second aspect of the invention there is provided a concrete containment panel adapted for disposition intermediate a spacer according to the first aspect and a cladding panel, the concrete containment panel having at least one opening sized for fastening engagement of the spacer with the cladding panel through the at least one opening.
A preferred embodiment of the concrete containment panel includes a first slot disposed adjacent the opening for receipt of at least part of an opposed end of the spacer and a second slot disposed adjacent the opening for receipt of at least part of the body of the spacer.
Preferably the concrete containment panel defines a plurality of sides adapted for engagement with like sides of like concrete containment panels, some of the sides defining tongues and others of the sides defining corresponding grooves.
In some preferred embodiments the concrete containment panel defines an external surface adapted for adhesion of a cladding panel. In one such embodiment external surface includes a plurality of slots.
A preferred embodiment of the concrete containment panel suitable for use as an end cap has a U shaped cross section.
According to a third aspect of the invention there is provided a cladding panel adapted for fastening engagement with a spacer according to the first aspect.
In some preferred embodiments the cladding panel includes first and second panels disposed at a preselected angular relationship relative to each other. In one such embodiment suitable for use at a corner the preselected angular relationship is 90°. In this preferred embodiment fastening formations are disposed on an interior side of the first panel and the interior side of the second panel is substantially planar.
According to a fourth aspect of the invention there is provided a brace adapted for fastening engagement with a spacer according to the first aspect.
A preferred embodiment of the brace includes an abutment member for abutment with a concrete containment panel, at least two fastening means being disposed on the abutment member for fastening engagement with a respective pair of spacers.
In one preferred embodiment of the brace the fastening means each define a leading portion and a trailing portion, the leading portion having a width greater than a width of the trailing portion. Preferable each of said fastening means includes a pair of opposed lips disposed at the leading portion. Also preferably, the fastening means are slidably disposed on the abutment member.
A preferred embodiment of the brace further includes a strut defining a proximal end disposed on the abutment member and a distal end for fastening to a support surface, for example a floor. Preferably the strut is centrally disposed on the abutment member. Also preferably the strut is rotatably disposed on the abutment member.
According to a fifth aspect of the invention there is provided a formwork construction kit including:
-
- a plurality of spacers in accordance with the first aspect;
- a plurality of concrete containment panels in accordance with the second aspect; and
- a plurality of cladding panels in accordance with the third aspect.
A preferred embodiment of the formwork construction kit further includes at least one brace in accordance with the fourth aspect.
According to a sixth aspect of the invention there is provided a method of formwork construction including the steps of:
-
- providing formwork constructions kit in accordance with the fifth aspect;
- disposing at least two spacers intermediate at least two concrete containment panels so as to form a concrete receptacle;
- pouring concrete into said concrete receptacle; and
- fastening at least one cladding panel onto said at least two spacers, such that said cladding panel is external to at least one of said concrete containment panels.
Preferably the step of “pouring concrete into said concrete receptacle” includes the further steps of:
-
- fastening a brace according to the fourth aspect onto the at least two spacers;
- pouring concrete into the concrete receptacle;
- allowing the concrete to harden; and
- detaching the brace from the at least two spacers.
According to a seventh aspect of the invention there is provided a wall constructed in accordance with a method according to the sixth aspect.
According to another aspect of the invention there is provided a structure including walls according to the seventh aspect.
Preferred embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
Referring to the drawings, the spacer 1 defines a body 2 having two opposed sides 3 and 4. The body 2 defines a separation distance between the opposed sides 3 and 4 for use as a spacer intermediate at least two concrete containment panels 5 and 6. Various preferred embodiments have separation distances suitable for forming walls having concrete thicknesses of 50 mm, 120 mm or 150 mm, for example. Each of the opposed sides 3 and 4 include fastening means 7 and 8 adapted for fastening of a cladding panel 16 disposed external to the concrete containment panels 5 and 6, as shown for example in
The fastening means depicted for example in
The first pair of projections {9 and 10} are fastenable with a first corresponding formation 13 disposed on a first cladding panel 16. Similarly, the second pair of projections {11 and 12} are fastenable with a second corresponding formation 17 disposed on a second cladding panel 18. This allows each spacer 1 to fasten the edges of two adjacent cladding panels 16 and 18.
Whilst four projections per side are utilized in the embodiment illustrated in
In other embodiments (not illustrated) the projections are disposed upon the cladding panels and the corresponding formations are disposed on the spacers. That is, the disposition of the male and female connectors is reversed from that shown in
In other embodiments (not illustrated) the fastener is an interference fit fastener.
As shown for example in
In the embodiment illustrated in
In another embodiment, the lug 25 dispenses with the elongate member 21 and instead uses the conesponding formations 13 described above to connect to the spacer 1, as shown in
With reference to the embodiment shown in
In yet another embodiment, as shown on the right hand side of
The concrete containment panel 5 includes openings 27 to allow the fastening means 7 to fasten the spacer 1 to the cladding panel 16 with the concrete containment panel 5 intermediate the spacer 1 and the cladding panel 16. In some embodiments, such as that shown in
The concrete containment panels 5 of some of the preferred embodiment are sized so as to correspond with, or be a multiple of, standard sizing for windows, doors and other typical construction apparatus. In some preferred embodiments, each of the concrete containment panels 5 have a height of 300 mm. Advantageously, the polystyrene from which the concrete containment panels 5 are constructed provides good insulation properties for the finalized structure.
The spacer 1 includes a planar surface 35 disposed at each of the opposed sides 3 and 4 for engagement with concrete containment panel 5. More particularly, the concrete containment panel 5 includes a first slot 36 adapted to receive the planar surface 35. The body 2 of the spacer 1 also includes two webbing members 37 and 38 extending intermediate the opposed sides 3 and 4. The concrete containment panel 5 includes a second slot 39 which receives the edge of the webbing members 37 and 38 when the planar surface 35 slides into the first slot 36.
The body 2 also includes a plurality of positioning formations 40 adapted for positioning of an elongate member extending transverse to the spacer body, for example to position a plumbing pipe, conduit, electrical cable or concrete reinforcing bar. The positioning formations 40 are in the form of semicircular ridges upon which the elongate member may securely rest. This assists in the routing of utilities and reinforcing prior to pouring of the concrete 67.
The body 2 also includes two transverse projections 41 disposed such that, in use, an end of the projection 41 abuts, or is adjacent to, the concrete containment panel 5; thereby further contributing to the secure engagement of the spacer 1 with the concrete containment panel 5.
With reference to
As shown for example in
Straight sections of formwork are erected using the straight concrete containment panels 5 illustrated in
An example of a straight cladding panel 16 is shown in
Various external finishes are provided upon different embodiments of the cladding panels 16. For example, some cladding panels 16 have an external surface finish that mimics or is made from sandstone, tiles, weatherboard. Yet other embodiments of the cladding panels 16 are made from gyprock or other suitable cladding materials.
Finishes that are typically suitable for use on either an internal or an external side of a structure are provided upon various embodiments of the cladding panels 16.
To counter bulging of the concrete containment panels 5 due to the weight of the concrete a brace 49 adapted for fastening engagement with the spacers 1 may be used, as shown in
As best shown in
The brace 49 includes a strut 57 defining a proximal end 58 disposed on the abutment member 50 and a distal end 59 for fastening to a support surface, for example a floor. The strut 57 provides further resistance against bulging of the concrete containment panels 5 due to the weight of the concrete. The strut 57 is centrally and rotatably disposed on the abutment member 50. In the illustrated embodiment the strut 57 is telescopically extensible so as to provide a range of usable lengths. Once the length of the strut has been set, the telescopic joint is lockable so as to fix the strut 57 at the desired length.
A platform support bracket 60 is attachable to the brace 49 so as to mount an access platform 61 across a plurality of like braces 49, as shown in
An alternative preferred embodiment of the spacer 69 is depicted in
The embodiment of the spacer 69 illustrated in
To assemble formwork using the embodiments of the spacers 69 shown in
Embodiments of the invention are packaged as construction kits which include a plurality of spacers 1, a plurality of concrete containment panels 5, a plurality of cladding panels 16 and, optionally, at least one brace 49. Using such a kit, the method of formwork construction of a wall includes the following steps.
-
- If the wall is being erected on a concrete slab, the slab should be clean, with no extraneous materials to obstruct the construction process.
- Erection of the formwork commences with a pair of corner concrete containment panels 5, as shown in
FIGS. 39 to 42 . Once spacers 1 have been slotted into the spaces 27 and slots 36 and 39, the external corner concrete containment panel 5 is typically placed flush with the corner of the slab. - Erection of the formwork for the wall is then continued using the straight concrete containment panels 5 as shown in
FIGS. 35 to 38 and 57, or using the corner or end cap panels 5 as required. Spacers 1 are slotted into these concrete containment panels 5, which are then stacked onto other concrete containment panels 5 ensuring that the tongues 42 securely engage with the grooves 43 (or ensuring that the teeth 62 securely interengage if the concrete panels ofFIG. 56 are being used). The end cap concrete containment panels 5 are utilized in positions in which windows, doors or the like are to be installed. - If non-standard sized concrete containment panels 5 are required, a hotwire tool is used to cut tongues and grooves into the polystyrene panels 5, as required.
- The concrete containment panel 5 stacking process continues so as to form a concrete receptacle, part of which is shown in
FIG. 34 by way of example. - Any pipes, conduits or utilities that may be embedded within the concrete are placed on the positioning formations 40.
- Any reinforcing that may be required, such as metal rods, starter bars, etc, is disposed within the concrete receptacle.
- If unacceptable bulging of the concrete containment panels 5 is anticipated, the abutment members 50 of the braces 49 are fastened onto some of the spacers 1 so as to abut and thereby support the concrete containment panels 5.
- Concrete 67 is poured into the concrete receptacle and allowed to cure.
- The braces 49 are detached from the relevant spacers 1.
- Starting at the top corner of the wall, the corresponding formations 13 on a corner cladding panel 16, as shown in
FIG. 48 , is aligned with the fastening means 7 of the appropriate spacers 1 and press fit fastened into place. - Working downwards, and alternating sides on which the first and second panels 47 and 48 are fastened, the corner cladding panels 16 are progressively press fit fastened onto the fastening means 7 of the spacers 1, such that they are external to the concrete containment panels 5. This process is continued with the straight cladding panels 16 as shown in
FIG. 47 until the wall is fully clad. Some embodiments make use of adhesives, such as cornice cement and the like, to supplement the fastening of the cladding panels 16. However, other embodiments rely solely on the fastening provided by engagement of the corresponding formations 13 into the fastening means 7. - Optionally, grout may be applied to any gaps between adjacent cladding panels 16.
It will be appreciated that the step of fastening the cladding panels 16 to the spacers 1 is relatively straight forward and may therefore be carried out by unskilled workers. This compares favorably with the majority of prior art cladding methods, which typically require specific expertise. Further, the uniform sizing of the concrete containment panels 5 results in uniformly distributed spacers 1, which is turn results in regularly distributed fastening means 7 for fastening of the cladding panels 16. This helps to ensure that the cladding panels are in correct alignment once fastened.
Whilst the invention has been described with reference to specific examples, those skilled in the art will appreciate that it may be embodied in many other forms.
Claims
1. A spacer defining a body having two opposed sides, said body defining a separation distance between said opposed sides for use as a spacer intermediate at least two concrete containment panels, at least one of said sides including fastening means adapted for fastening of at least one cladding panel disposed external to at least one of said concrete containment panels, wherein said fastening means is a snap lockable connector.
2. A spacer according to claim 1 wherein said snap lockable connector includes at least one projection disposed on one of the spacer or the cladding panel. Said projection being resiliently biased for interlocking engagement with a corresponding formation provided upon the other of the spacer or the cladding panel.
3. (canceled)
4. (canceled)
5. (canceled)
6. (canceled)
7. (canceled)
8. A spacer defining a body having two opposed sides, said body defining a separation distance between said opposed sides for use as a spacer intermediate at least one concrete containment panels, at least one of said sides including fastening means adapted for fastening of at least one cladding panel to disposed external to at least one of said concrete containment panels, wherein said fastener includes a slot disposed in one of the spacer or the cladding panel, said slot defining at least one detent; and an elongate member disposed on the other of the spacer or the cladding panel, said elongate member including a formation adapted for engagement with said detent.
9. (canceled)
10. A spacer according to claim 1 wherein said fastening means is adapted for press fit fastening of the cladding panel to the spacer.
11. A spacer according to claim 1 wherein said fastening means is adapted for fastening of the spacer to the cladding panel through an opening provided within at least one of said concrete containment panels.
12. A spacer according to claim 1 wherein said fastening means includes at least one tongue disposed on one of said spacer or cladding panel and at least one groove disposed on the other of said spacer or cladding panel.
13. A spacer according to claim 12 wherein a T shaped member defines a pair of opposed tongues, each of said tongues being separately engageable with corresponding grooves provided upon two adjacent cladding panels.
14. A spacer according to claim 1 wherein said fastening means includes a lug removably attachable to said at least one opposed side, said lug including cladding panel retaining formations.
15. A spacer according to claim 14 wherein said lug is T shaped.
16. A spacer according to claim 14 wherein said lug includes a handle for removal of the lug upon adhesion of the cladding panel to the at least one opposed side and/or to the concrete containment panel.
17. A spacer according to claim 1 wherein said fastener includes a connection component fastenable to said at least one side, said connection component being slidably matable with said cladding panel.
18. A spacer according to claim 1 wherein said cladding panel is fastenable to said at least one opposed side at any one of a plurality of selectable connection points lying on said cladding panel.
19. (canceled)
20. (canceled)
21. (canceled)
22. (canceled)
23. (canceled)
24. (canceled)
25. (canceled)
26. (canceled)
27. (canceled)
28. A concrete containment panel adapted for disposition intermediate a spacer according to any one of claim 1 at least one concrete containment panel having at least one opening sized for fastening engagement of the spacer with the cladding panel through the at least one opening.
29. A concrete containment panel according to claim 28 including a first slot disposed adjacent said opening for receipt of at least part of an opposed end of the spacer and a second slot disposed adjacent said opening for receipt of at least part of the body of the spacer.
30. A concrete containment panel according to claim 28 wherein said concrete containment panel defines a plurality of sides adapted for engagement with like sides of like concrete containment panels, some of said sides defining tongues and others of said sides defining corresponding grooves.
31. (canceled)
32. (canceled)
33. (canceled)
34. (canceled)
35. A cladding panel according to claim 1 wherein said cladding panel includes first and second panels disposed at a preselected angular relationship relative to each other.
36. A cladding panel according to claim 35 wherein said preselected angular relationship is 90° and wherein said cladding panel is for use at a corner.
37. (canceled)
38. (canceled)
39. A brace adapted for fastening engagement with a spacer according to claim 1 including an abutment member for abutment with a concrete containment panel, at least two fastening means being disposed on said abutment member for fastening engagement with a respective pair of spacers.
40. A brace according to claim 39 wherein said at least two fastening means each define a leading portion and a trailing portion, said leading portion having a width greater than a width of said trailing portion.
41. (canceled)
42. (canceled)
43. A brace according to any one of claim 39 further including a strut defining a proximal end disposed on the abutment member and a distal end for fastening to a support surface.
44. A brace according to claim 43 wherein said strut is centrally disposed on the abutment member.
45. A brace according to claim 43 wherein said strut is rotatably disposed on the abutment member.
46. A formwork construction kit including:
- a plurality of spacers;
- a plurality of concrete containment panels; and
- a plurality of cladding panels wherein at least one of said cladding panels are attached to at least one of said spacers by at least one snap lockable connectors.
47. A formwork construction kit according to claim 46 further including at least one brace adapted for fastening engagement with at least one spacer.
48. A method of formwork construction including the steps of:
- providing formwork constructions kit wherein at least two spacers are intermediate at least two concrete containment panels so as to form a concrete receptacle;
- pouring concrete into said concrete receptacle; and
- fastening at least one cladding panel onto said at least two spacers using a snap lockable connector, such that said cladding panel is external to at least one of said concrete containment panels.
49. A method according to claim 48 wherein the step of “pouring concrete into said concrete receptacle” includes the further steps of:
- fastening a brace onto said at least two spacers;
- pouring concrete into said concrete receptacle;
- allowing the concrete to harden; and
- detaching said brace from said at least two spacers.
50. A wall comprising a plurality of spacers each spacer having a body comprising two opposed sides, said body defining a separation distance between said opposed sides for use as a spacer; and a plurality of panels attached to said spacers using a snap lockable connector.
51. The wall of claim 50 wherein said panels are concrete containment panels.
52. The wall of claim 50 wherein said panels are cladding panels.
53. A structure comprising a spacer defining a body having two opposed sides, said body defining a separation distance between said opposed sides for use as a spacer between two cladding panels, wherein said cladding panels are supported by said spacer using a fastening means comprising at least one snap lockable connector.
54. The structure of claim 53 further comprising at least one concrete containing panel disposed between said two opposed sides.
Type: Application
Filed: Dec 8, 2006
Publication Date: Oct 7, 2010
Inventors: Falekava Mahe (New South Wales), Michael Hoesli (New South Wales)
Application Number: 12/087,750
International Classification: E04B 2/84 (20060101); E04B 2/08 (20060101); E04G 17/06 (20060101);