Mullion-Transom Structure

Abstract

A mullion-transom structure, especially for facades or glass roofs, includes a supporting profile to which at least one infill element is fastened. An insulating strip is arranged on an end face of the infill element. The insulating strip is held on the supporting profile and has at least one hollow chamber. The insulating strip has at least one mobile cover by which the hollow chamber of the insulating strip can be closed.

Description

BACKGROUND AND SUMMARY OF THE INVENTION

The present invention relates to a mullion-transom structure, especially for facades or glass roofs, comprising a supporting profile to which at least one infill element is fastened, wherein an insulating strip is arranged at an end face of the infill element, which insulating strip is held on the supporting profile and comprises at least one hollow chamber.

EP 1 352 134 discloses a mullion-transom structure, in which a screw groove is formed on the mullion profile between two glass panes. An insulating profile, which comprises a hollow chamber, is inserted into the screw groove. Several screws can be mounted in the insulating profile and the screw groove for fixing the glass panes via a pressure strip. The arrangement of such an insulating profile on the screw groove has proven its worth. However, heat insulation is limited because the insulating profile mostly consists of a harder plastic material which comes with comparatively high heat conduction. Furthermore, heat insulation cannot be adjusted due to the closed configuration of the hollow chamber of the insulating profile.

It is therefore the object of the present invention to provide a mullion-transom structure which has improved heat insulation and allows flexible adjustment of the insulation properties.

This object is achieved by a mullion-transom structure in accordance with embodiments of the invention.

In accordance with the invention, the insulating strip comprises a hollow chamber at a face end of an infill element, which hollow chamber can be closed via at least one mobile cover, so that access to the hollow chamber is enabled via the cover. Heat-insulating strips or other elements can be inserted into the hollow chamber as required, which allows a flexible adjustment of the insulating strip. The term “cover” shall comprise any element which can enable access to the hollow chamber, irrespective of whether the cover is pivotable or closable, or creates access in any other manner.

The cover is preferably detachably fixed to the insulating strip. Multiple opening and closing actions can thus be performed. The cover can be latched onto the insulating strip.

The insulating strip preferably comprises at least one film hinge, on which a cover is pivotably mounted. It is possible that the insulating strip is formed from two parts, wherein in this case one part forms the cover and is pivotably held via the film hinge. It is also possible to pivotably hold the cover via two or more adjacently arranged film hinges, so that especially wide opening angles can be realized.

According to a preferred embodiment, a material which has higher heat insulation than a shaped body of the insulating strip is inserted at least partly into the hollow chamber. The materials can especially be formed from insulating foam or any other insulating material which is formed for example from polyethylene, polypropylene, polyurethane, polyisocyanurate, polystyrene, phenolic resin and/or mineral wool. All materials can be used as insulating materials which have an effect with respect to thermal insulation, noise insulation, fire protection or a combination of these functions.

It is additionally possible that the insulating strip comprises a shaped body in which an insulating strip of higher heat insulation than the shaped body is fixed to its exterior side at least in sections. The aforementioned insulating materials, especially such from an insulating foam, can also be used for the heat-insulating strips arranged on the exterior side on the insulating strips.

The insulating strip can comprise a shaped body for especially high heat insulation, which shaped body comprises a plurality of breakthroughs in the longitudinal direction. The shaped body of the insulation strip mostly consists of a dimensionally stable plastic body which has a comparatively high thermal conductivity. The heat flow is reduced by reducing the cross-sectional surface of the shaped body by the breakthroughs, wherein the breakthroughs can be arranged for this purpose in at least one strip in the longitudinal direction. The area of the breakthroughs can be more than 50%, especially more than 70%, on this strip.

The shaped body of the insulating strip which is made of plastic can preferably be formed with thin walls in order to ensure good thermal insulation. The wall thickness of the shaped body can lie in a range of between 0.3 mm to 1.6 mm, especially 0.5 mm to 1.3 mm.

The hollow chamber of the insulating strip can be subdivided by at least one separating wall for a further increase in the insulation. The stability of the shaped body can also be increased by the separating wall.

An insulating element in form of a shaped body is preferably inserted into the hollow chamber. The insulating element can be inserted as a loose strip. It is also possible to foam an insulating strip into the hollow chamber, e.g. by co-extrusion.

In a preferred embodiment, a base of a groove of the insulating strip comprises a film hinge, by means of which the insulating strip is pivotable in two halves. As a result, the insulating strip is formed in a closed way in the mounted state on the exterior side, so that the insulating strip is not inadvertently opened when a screw is twisted into the groove and a screw groove arranged behind said groove. Latching means for fixing the shaped body in the closed position to an insert part are therefore preferably formed, which insert part is inserted into a screw groove.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be explained below in closer detail by reference to several embodiments shown in the enclosed drawings, wherein:

FIG. 1 shows a sectional view through a mullion-transom structure in accordance with the invention with an insulating strip;

FIGS. 2A and 2B show two views of an insulating strip for a mullion-transom structure in accordance with the invention;

FIGS. 3A to 3C show several views of a second insulating strip;

FIGS. 4A and 4B show two views of a third insulating strip;

FIGS. 5A to 5C show several embodiments of a latching mechanism for an insulating strip;

FIGS. 6A and 6B show two views of a further insulating strip;

FIGS. 7 A and 7B show two views of a further insulating strip;

FIGS. 8A and 8B show two views of a further insulating strip;

FIGS. 9A to 9D show several views of a further insulating strip with a foam-embedded insulating element during production;

FIGS. 10A and 10B show two further embodiments of an insulating strip;

FIG. 11 shows a perspective view of a further embodiment of an insulating strip;

FIGS. 12A and 12B show two views of the insulating strip of FIG. 11 with different breakthroughs;

FIGS. 13A to 13D show different views of breakthroughs with different geometries, and

FIG. 14A and 14B show two views of a further embodiment of an insulating strip.

DETAILED DESCRIPTION OF THE DRAWINGS

A mullion-transom structure comprises a supporting profile 1, which can be formed as a mullion or transom, wherein a screw groove 2 is provided on an exterior side. Retainers 3 for sealing strips 4 are formed on both sides of the screw groove 2, which sealing strips rest at the edge on an infill element 5, especially an insulating glass pane. A pressure strip 7 is provided to fix the infill element 5, which pressure strip is arranged with seals 8 on an exterior side of the infill elements 5. The infill elements 5 are respectively clamped at the edge between the seals 8 and the sealing strips 4. The pressure strip 7 is fixed via several screws 11, which are arranged in an intermediate space 6 between the face ends of the infill elements 5 and engage in the screw groove 2.

An insulating strip 10 is further provided at the face end of an infill element 5, which insulating strip 10 is penetrated by the screw 11 and comprises a shaped body 12, on the exterior side of which a heat-insulating strip 13 made of a material with high heat insulation such as a foam-embedded heat-insulating strip is arranged. The heat-insulating strip 13 comprises several sealing lips 14 which rest on a face end of the infill elements 5.

Different embodiments of such an insulating strip 10 will be described below, wherein the same components are provided with the same reference numerals.

FIGS. 2A and 2B show an insulating profile 20 which comprises a shaped body 21 which is made of a hard plastic material such as PVC and surrounds a hollow chamber 22. A groove 23 is formed on one side of the insulating profile 20, which groove is surrounded by lateral webs 24 and is used for example for fixing a seal or any other component. The base of the groove 23 is formed as a V-shaped film hinge 25, so that the two halves of the shaped body 21 can be pivoted around the film hinge 25 in order to provide access to the hollow chamber 22.

Heat-insulating strips 28 are provided on two opposite side surfaces of the shaped body 21, which heat-insulating strips comprise several outwardly protruding sealing projections 29 or sealing lips. The material of the heat-insulating strips 28 consists of a material of higher heat insulation than the shaped body 21, such as insulating foam.

An insert element 26 is formed on the shaped body 21 on the side opposite of the groove 23, on which a latching device 27 is provided. As is shown in FIG. 2B, the two halves of the shaped body 21 can be pivoted about the film hinge 25, so that the hollow chamber 22 can be opened on the insert element 26. A shaped part 15 of high thermal insulation, e.g. one that is made of a foamed material, especially an insulating material made of polyethylene, polypropylene, polyurethane, polyisocyanurate, polystyrene, phenolic resin or mineral wool, can be inserted in this position into the hollow chamber 22. Said shaped part 15 made of an insulating material can assume functions concerning heat insulation, noise insulation and fire protection. The shaped part 15 comprises two grooves 16 in the middle region, into which the webs 32 on the shaped part 21 engage so that the shaped part is fixed within the hollow chamber 22.

It can be decided during mounting whether a shaped part 15 is inserted into the hollow chamber 22 for higher heat insulation and which material is selected for the shaped part 15. This leads to a high degree of flexibility concerning the purpose of the insulating strip 20. After inserting the shaped part 15 into the hollow chamber 22, the shaped body 21 of the insulating strip 20 can be pivoted about the film hinge 25 until the latching device 27 latches and the insulating strip 20 can now be mounted on the mullion-transom structure, as shown in FIG. 1 for example.

FIGS. 3A to 3C show a modified embodiment of an insulating strip, in which not only one single shaped part 15 can be inserted into the hollow chamber 22 of the shaped body 21 but two shaped parts 17 and 18. The shaped parts 17 and 18 can be made of the same or a different material. Each shaped part 17 or 18 can be inserted loosely into the hollow chamber 22 or be glued therein. Webs 32 can be utilised as spacers between the shaped parts 17 and 18. Apart from that, the insulating strip is formed as in the preceding embodiment of FIG. 2.

A modified insulating strip is shown in FIGS. 4A and 4B, in which a shaped body 21 comprises a film hinge 30 which is no longer provided on the base of the groove 23, but on the opposite side on the insert element 26. The shaped body 21 of the insulating strip can thus be pivoted about the film hinge 30, as shown in FIG. 4B. The groove 23 respectively comprises webs 24 on the sides and a base which is formed by two webs 31 which are arranged in a V-shaped manner and touch each other in the middle region. The webs 31 are formed in an inclined manner in relation to the insert element 26 and can be easily pivoted when a screw 11 is twisted into the insulating profile.

In FIGS. 5A to 5C, the insulating strip of FIG. 2 is shown with modified latching mechanisms. In FIG. 5A, a pushbutton 34 is formed on the insert element 26, which latches together when the pushbutton parts are pressed together.

A latching device with latching receivers 35 and latching webs 36 is provided in FIG. 5B on the insert element 26, which receivers and webs are respectively arranged on the inner side of the insert element 26 and latch onto each other when the insert element is pressed together. Three latching receivers 35 and three latching webs 36 are provided, so that in case of damage to one latching connection the other latching connections hold the shaped body 21 in the latched position.

A latching device with a latching receiver 37 and a latching web 38 is formed in FIG. 5C.

Integrally formed latching devices can be provided for latching the shaped body 21, which latching devices can be formed as pushbuttons, undercut contours, latching webs, snap-on connections or other kinds of snap-on connections.

A further embodiment of an insulating strip is shown in FIGS. 6A and 6B, which comprises a shaped body 45 on which a plate-shaped cover 40 is pivotably mounted. For this purpose, the plate-shaped cover 40 is connected via a film hinge 41 to the shaped body 45, wherein the film hinge is formed on the shaped body 45 on a side wall 24 of the groove 23. An insert element 26 is provided on the side opposite the groove 23, which is formed of two mutually connected webs as in the preceding embodiment, which webs surround a hollow chamber so that the insert element 26 is elastically formed.

The cover 40 is shown in an open position in FIG. 6B, in which the hollow chamber 22 is accessible. The hollow chamber is divided by a separating wall 33 into two individual chambers, wherein a respective shaped part 17 made of a material with high thermal insulation is arranged in both chambers. An angular spring bar 42 is provided on the cover 40, which spring bar can be inserted into a latching recess 43 adjacent to the insert element 26 in order to latch the cover 40 on the shaped body 45, as shown in FIG. 6A. In this position, the separating wall 33 rests with one face edge on the cover 40.

A further embodiment of an insulating strip is shown in FIGS. 7A and 7B, in which a shaped body with a bottom part 50 and an upper part 52 is provided. The bottom part 50 comprises a U-shaped hollow chamber 22, at the end of which an insert element 26 is formed. A shaped part 15 made of a material with high thermal insulation is inserted into the hollow chamber 22, wherein latching projections 51 are formed on the bottom part 50 on a side facing the hollow chamber 22. The latching projections 51 interact with latching webs 53 which are formed integrally with the upper part 52. The upper part 52 comprises a groove 23 which is surrounded by a lateral webs or side walls 24. The upper part 52 can be removed as a cover from the bottom part 50 in order to fill the hollow chamber 22 and insert the shaped part 15 and subsequently place the upper part 52 on the bottom part 50, as shown in FIG. 7B.

FIGS. 8A and 8B show an embodiment which is modified over that of FIG. 7, in which an integral shaped body with the bottom part 50 and the upper part 52 is provided instead of a bottom part and an upper part, which bottom part 50 and upper part 52 are connected to each other via a film hinge 54. Apart from that, the insulating strip is formed as in FIG. 7.

FIGS. 9A to 9D shows a further embodiment of an insulating strip, which according to FIG. 9A is shown at first in an open position. The insulating strip corresponds to the embodiment of FIG. 2B. However, no loose shaped part made of an insulating material is inserted into the hollow chamber 22, but a foaming material 61 is injected into the hollow chamber 22 via a nozzle 60. The insulating strip is closed after inserting the foaming material 61, as shown in FIG. 9B, wherein the latching device 27 on the insert element 26 ensures fixing of the insulating element in the closed position. In this position, the foamed material 62 can fully or partly fill the hollow chamber 22 as required, wherein only a slight expansion of the foaming material 62 is present in FIG. 9B. The material can expand even further and assume a greater volume, as shown in FIG. 9C, in which the material 62′ already extends over more than 2/3 of the volume of the hollow chamber 22. It is further possible to add the foaming material with a volume which fully fills the hollow chamber 22, as shown in FIG. 9D.

FIGS. 10A and 10B show a further embodiment of an insulating strip, wherein a shaped body 70 made of a hard plastic material is provided which surrounds two hollow chambers. A shaped part 75 made of a material with high thermal insulation is inserted into each hollow chamber. The shaped body 70 comprises a cover 71 in form of a side wall which is connected via a film hinge 72 to the shaped body 70. The film hinge 72 is formed in the region of the side wall and allows pivoting of the cover 71 in order to fill the hollow chambers. The formed body 70 further comprises integrally formed latching devices, wherein two mutually spaced latching webs 73 are provided for this purpose which engage in an undercut latching receiver 74 on the cover 71. Stable fixing of the insulating strip in the closed position is thus obtained.

Two shaped parts 75 which are substantially rectangular in their cross-section are provided in FIG. 10A, which shaped parts are each inserted into one hollow chamber. Instead of these rectangular shaped parts 75, it is also possible to insert shaped parts 76 into the hollow chambers which are formed in different ways and are made of a material with high thermal insulation. The shaped parts 76 comprise an obliquely extending side which is inserted with a tip into a V-shaped receiver of the hollow chamber, so that the formed parts 76 are substantially fixed in an interlocking manner in the region of the V-shaped tip. The upper shaped part 76 further has a V-shaped contour on the bottom side which is inserted into a V-shaped receiver of the latching web 73.

FIG. 11 shows a further embodiment of an insulating strip, which corresponds to the insulating strip shown in FIG. 2 with respect to its configuration. However, two strips with circular breakthroughs 80 are additionally provided in the side walls of the insulating strip. The breakthroughs 80 can also be provided with a different geometry than the circular one, e.g. square, rectangular, triangular or any other contour. The breakthroughs 80 are arranged in strips in the longitudinal direction of the insulating strip, wherein the area of the breakthroughs 80 assumes at least 50%, preferably approximately 70%, especially more than 80%, of the area of the strip, wherein the respective geometric strip has a width which corresponds to the width of the breakthroughs 80. Two strips with breakthroughs 80 are provided in FIG. 11, which are arranged on opposite sides of the insulating strip. It is also possible to provide only one strip with breakthroughs 80 or more than two strips with breakthroughs 80.

The material of the shaped body 21 is reduced by the breakthroughs 80, so that thermal conduction is reduced since thermal conduction is reduced from the outside to the inside by the reduction of the cross-section of the shaped body 21 from the insert element 26 to the groove 23 in the mullion-transom structure of FIG. 1.

FIG. 12A shows a sectional view through the insulating strip of FIG. 11, wherein the illustration shows that the shaped part 15 inserted into the hollow chamber 22 is not formed with a breakthrough configuration. Instead, the hollow chamber 22 is filled. The breakthroughs 80 merely extend through the outer heat-insulating strip 28 and the shaped body 21.

It is also alternatively possible according to FIG. 12B to provide the breakthroughs 80 in such a way that the complete insulating strip is broken through, i.e. both in the region of the heat-insulating strip 28, in the region of the shaped body 21 and in the region of the shaped part 15 made of heat-insulating material. This facilitates the production of the insulating strip, even if the insulation is slightly reduced.

The breakthroughs 80 are schematically shown in FIG. 13A in the shaped body 21 according to FIG. 11. The breakthroughs 80 are arranged in regular intervals in the longitudinal direction of the insulating strip and extend in strips parallel to the longitudinal direction. The width of a strip S₁ corresponds to the width of the breakthroughs 80. The breakthroughs 80 assume an area of at least 50%, preferably at least 70%, relating to the width of the strip S₁.

The breakthroughs 82 are shown in rectangular form in FIG. 13B, which have a lower width S₂ than the circular breakthroughs 80. Three parallel strips with breakthroughs 82 are provided instead of two strips.

Triangular breakthroughs 83 are provided in FIG. 13C, so that a framework-like structure is provided in the profile body 21. The triangles are oriented in an alternating manner with one upwards tip or one downwards tip, so that obliquely extending webs are formed in between. The breakthroughs 83 in triangular form are oriented in strips parallel to the longitudinal direction, wherein the area of the breakthroughs assumes at least 80% of the area of the strips relating to the width of the strip S₃.

The breakthroughs 84 are formed in a trapezoidal manner in the embodiment shown in FIG. 13D and comprise a longer base edge extending parallel to the longitudinal direction of the insulating strip and a shorter face edge. The trapezoidal breakthroughs 84 are each arranged twisted by 180° in an alternating manner, so that a longer base edge is present in an alternating manner in relation to a shorter face edge as seen in the longitudinal direction. The breakthroughs assume at least 85% of the area relating to the width S₄ of the strip with the breakthroughs 84.

The breakthroughs 80, 82, 83 and 84 can also have other geometric shapes and the number of the strips with the breakthroughs can be selected freely depending on the size of the profile body 21 and the breakthroughs.

FIG. 14A shows a further embodiment of a shaped body made of plastic for an insulating strip. The shaped body comprises a hollow chamber 22 which is formed in a substantially rectangular manner in its cross-section for the optional insertion of an insulating material. A groove 23 is formed on a face end of the shaped body, which groove is surrounded by lateral webs 24, which comprise inwardly facing projections and can be used for fixing a seal or any other component. The base of the groove 23 is formed as a V-shaped film hinge 25, so that the two halves of the shaped body 21 can be pivoted about the film hinge 25 in order to provide access to the hollow chamber 22.

An insert element 26 is formed on the side opposite the groove 23, which insert element is formed from two spaced wall sections which surround the hollow chambers 94 and 95. The wall sections of the insert element 26 can be fixed via latching webs 90, 91 and 92, 93, which are formed in the shape of hooks and fix the closed position of the shaped body.

In order to provide access to the hollow chamber 22, the two halves of the shaped body 21 can be pivoted about the film hinge 25. It is additionally or alternatively possible to open the hollow chamber 22 in that one side of the shaped body 21 is pivoted about a further film hinge 96 which is formed on a side wall of the hollow chamber 22 adjacent to the groove 23. Especially large opening angles can be obtained when using the two film hinges 25 and 96. The film hinge 96 can also be provided on opposite sides of the hollow chamber 22 instead of only one side.

FIG. 14B shows the insulating strip with the shaped body of FIG. 14A, in which a strip-like shaped part 15 with high thermal insulation is loosely inserted into the hollow chamber 22. Heat-insulating strips 97 are fixed to the exterior side of the side walls of the hollow chamber 22, especially by gluing.

The described embodiments can be combined with each other at will, e.g. it is also possible to provide several hollow chambers on the insulating strip instead of only one single hollow chamber. Moreover, one or several hollow chambers can be filled with shaped bodies made of heat-insulating material, wherein the material of the shaped parts can be used depending on the desired function. In particular, it may be necessary for reasons of fire protection to use only specific insulating materials, whereas other materials can be preferred for optimal heat insulation. The shaped parts 15 can be fixed in the hollow chamber mechanically and also glued or foam-embedded in said chamber.

The insulating strip 20 can further comprise an attachment element instead of an insert element 26 which is inserted into the screw groove 2, which attachment element is attached with two legs on the outside to the screw groove 2.

LIST OF REFERENCE NUMERALS

• 1 Supporting profile
• 2 Screw groove
• 3 Retainer
• 4 Sealing strip
• 5 Infill element
• 6 Intermediate space
• 7 Pressing strip
• 8 Seal
• 10 Insulating strip
• 11 Screw
• 12 Shaped body
• 13 Heat-insulating strip
• 14 Sealing lip
• 15 Shaped part
• 16 Groove
• 17 Shaped part
• 18 Shaped part
• 20 Insulating strip
• 21 Shaped body
• 22 Hollow chamber
• 23 Groove
• 24 Web
• 25 Film hinge
• 26 Insert element
• 27 Latching device
• 28 Heat-insulating strip
• 29 Sealing projection
• 30 Film hinge
• 31 Web
• 32 Web
• 33 Separating wall
• 34 Pushbutton
• 35 Latching receiver
• 36 Latching web
• 37 Latching receiver
• 38 Latching web
• 40 Cover
• 41 Film hinge
• 42 Spring bar
• 43 Latching recess
• 45 Shaped body
• 50 Bottom part
• 51 Latching projection
• 52 Upper part
• 53 Latching web
• 54 Film hinge
• 60 Nozzle
• 61 Material
• 62, 62′ Material
• 70 Shaped body
• 71 Cover
• 72 Film hinge
• 73 Latching web
• 74 Latching receiver
• 75 Shaped part
• 76 Shaped part
• 80 Breakthrough
• 82 Breakthrough
• 83 Breakthrough
• 84 Breakthrough
• 90 Latching web
• 91 Latching web
• 92 Latching web
• 93 Latching web
• 94 Hollow chamber
• 95 Hollow chamber
• 96 Film hinge
• 97 Heat-insulating strip

Claims

1-13. (canceled)

14. A mullion-transom structure, comprising:

a supporting profile;

at least one infill element fastened to the supporting profile;

an insulating strip arranged at an end face of the at least one infill element, said insulating strip being held on the supporting profile,

wherein the insulating strip comprises at least one hollow chamber and includes at least one mobile cover by which the hollow chamber of the insulating strip is closable.

15. The mullion-transom structure according to claim 14, wherein the cover is detachably fixed to the insulating strip.

16. The mullion-transom structure according to claim 15, wherein a material is inserted at least partly into the hollow chamber, which material has a higher thermal insulation than a shaped body of the insulating strip.

17. The mullion-transom structure according to claim 14, wherein a material is inserted at least partly into the hollow chamber, which material has a higher thermal insulation than a shaped body of the insulating strip.

18. The mullion-transom structure according to claim 14, wherein the cover is latchable onto the insulating strip.

19. The mullion-transom structure according to claim 14, wherein the insulating strip comprises a film hinge and the cover is pivotably formed by the film hinge.

20. The mullion-transom structure according to claim 14, wherein the insulating strip comprises a shaped body, on an exterior side of which a heat-insulating strip with higher thermal insulation than the shaped body is attached.

21. The mullion-transom structure according to claim 14, wherein the insulating strip comprises a shaped body which comprises a plurality of breakthroughs in a longitudinal direction of the insulating strip.

22. The mullion-transom structure according to claim 21, wherein the breakthroughs are arranged in a strip-like manner in the longitudinal direction of the insulating strip and an area of the breakthroughs assumes at least 50% in relation to the area of the strip, wherein the width of the strip has the same width as the breakthroughs.

23. The mullion-transom structure according to claim 22, wherein the area of the breakthroughs assumes at least 70% in relation to the area of the strip.

24. The mullion-transom structure according to claim 14, wherein the hollow chamber of the insulating strip is subdivided by at least one separating wall.

25. The mullion-transom structure according to claim 14, wherein a heat-insulating strip is foam-expanded into the hollow chamber of the insulating strip.

26. The mullion-transom structure according to claim 14, wherein a base of a groove of the insulating strip comprises a film hinge by which the insulating strip is pivotable in two halves.

27. The mullion-transom structure according to claim 14, wherein a latch is formed for fixing, in a closed position, a shaped body of the insulating strip on an insert part, which insert part is retained in a screw groove.

28. The mullion-transom structure according to claim 14, wherein the insulating strip comprises a shaped body made of plastic, wherein a wall thickness of the shaped body lies in a range of between 0.3 mm to 1.6 mm,

29. The mullion-transom structure according to claim 28, wherein the wall thickness of the shaped body lies in a range of between 0.5 mm to 1.3 mm.

30. The mullion-transom structure according to claim 14, wherein the structure is configured for a facade or a glass roof.