Façade substructure console

Abstract

The invention relates to a facade substructure bracket comprising two support parts (10, 20), a cantilever bracket (30), an inner thermal break layer pair (40), and a coupling bolt arrangement (50), wherein the support parts (10, 20) are designed as a lower support part (10) and an upper support part (20), wherein the lower support part (10) has an upturned longitudinally extended lower part flange (14) and the upper support part (20) has an upturned longitudinally extended upper part flange (24), wherein the cantilever bracket (30) has a support-side bracket coupling section (31) and a facade-side mounting section (32), wherein the bracket coupling section (31) is arranged plane-parallel between the lower part flange (14) and the upper part flange (24), and the facade-side mounting section (32) is for coupling the facade construction components are formed wherein the inner thermal break layer pair (40) is a first and a second thermal break layer (41,42) and the first thermal separation layer (41) is arranged between the lower part flange (14) and the sword coupling section (31) and the second thermal separation layer (42) is arranged between the sword coupling section (31) and the upper part flange (24), wherein the coupling bolt arrangement (50) has at least one coupling bolt (51) which positively defines the positional relationship between the support parts (10, 20), the cantilever sword (30) and the thermal separation layer pair (40).

Description

[0001] The invention relates to a facade substructure console with special thermal separation.

[0002] According to current technology, curtain walls are known as high-quality facade constructions. These have a facade substructure that is attached to a building wall, for example, and provides a space for the installation of a thermal insulation layer.

[0003] To reduce the heating energy demand of buildings, there is a constant effort to improve thermal insulation. This can be achieved, firstly, by using thicker insulation layers or insulation materials with lower thermal conductivity. Secondly, efforts are being made to reduce heat transfer from the building wall through the structural elements of the facade, and in particular by providing brackets with lower heat transfer properties.

[0004] The use of heat-insulating materials in the structural elements is limited insofar as their mechanical properties must not be impaired.

[0005] For example, German patent DE 20 2012 001 462 U1 proposes, to reduce heat transfer at a wall bracket for a curtain wall, the installation of a thermal sleeve on the wall bracket. A particular disadvantage is the increased effort required to integrate the thermal sleeve into the existing thermal insulation, as well as the heat conduction that remains within the wall bracket.

[0006] Furthermore, DE 297 03 013 U1 discloses a facade substructure bracket comprising a support part, a cantilever bracket, an internal thermal break layer, and a coupling bolt arrangement, wherein the support lower part has a lower part middle section, wherein the lower part middle section forms a lower part base plane which has a lower part base plane underside, wherein the lower part middle section has an upturned longitudinally extended lower part flange which is arranged transversely to the lower part base plane and has at least one lower part flange bore, wherein the cantilever bracket has a support-side bracket coupling section and a facade-side mounting section, and has at least one bracket bore aligned with the flange bores.wherein the facade-side mounting section is designed for coupling facade construction components and wherein the cantilever bracket and the fastening holes are arranged in a common load-bearing plane, wherein the first thermal break layer is designed between the lower flange and the bracket coupling section and for thermal separation between the lower beam and the cantilever plate, and wherein the coupling bolt arrangement comprises at least one coupling bolt. Further brackets are known from EP 3 222 794 A1 or EP 2 915 933 A1.

[0007] The object of the invention is to provide a facade substructure console with improved thermal separation that is mechanically highly resilient, adaptable to different thermal insulation requirements, cost-effective to manufacture and easy to assemble, and also exhibits high weather resistance and service life.

[0008] The problem is solved by a facade substructure bracket with the features listed in claim 1. Preferred embodiments are described in the dependent claims.

[0009] The facade substructure console according to the invention is particularly suitable for direct mounting on a building exterior wall and for absorbing high vertical loads through a curtain wall.

[0010] The facade substructure console - hereinafter also referred to as console for short - according to the invention comprises as basic components a lower support part and an upper support part - hereinafter collectively referred to as the support parts - , a cantilever blade, an inner thermal break layer pair and a coupling bolt arrangement.

[0011] The lower and upper support parts preferably have essentially the same structure with a symmetrical arrangement, wherein the upper support part rests section by section on the lower support part.

[0012] The structure is described in particular with reference to the lower support part. According to the invention, the lower support part has a first and second subdividing end section as well as a subdividing middle section.

[0013] The sub-sections form a common sub-base plane. The sub-base plane has an underside that is designed for parallel alignment with a substructure, in particular an exterior building wall.

[0014] The end sections of the lower section are arranged longitudinally on both sides of the central section and each has a bore. These bores are referred to as the lower mounting bores.

[0015] The lower section's central portion further comprises a longitudinally extended, upturned lower section flange. The plane of the lower section flange is arranged transversely, and preferably orthogonally, to the lower section's base plane. The lower section flange thus has the form of a one-sided upturn of the lower section's central portion, such that the unupturned area forms part of the lower section's base plane.

[0016] The lower flange has at least one lower flange bore, but preferably at least two lower flange bores. The axis of the lower flange bores lies essentially parallel to the base plane of the lower part and transverse to the longitudinal axis of the support lower part.

[0017] Since the upper support part preferably has the same structure as the lower support part, the descriptions of the lower support part also apply to the upper support part accordingly.

[0018] The upper support section comprises a first and second upper end section as well as an upper middle section, the upper sections forming a common upper base plane that is parallel to the lower base plane. The upper end sections are also arranged on both sides of the upper middle section when viewed longitudinally and each has a bore, referred to as the upper mounting bores.

[0019] According to the invention, the first upper end section rests flat on the first lower end section, and the second upper end section rests flat on the second lower end section. The mounting holes of the lower and upper end sections are aligned and designed to receive a mounting bolt for attachment to the substructure. The mounting bolt itself is not part of the bracket according to the invention. In particular, it can be a pull-out-resistant screw or a dowel anchor. The mounting bolt extends from above through the upper mounting hole and then through the lower mounting hole into the substructure, with the bearing surface of the mounting bolt resting on the upper side of the respective upper end section.Furthermore, according to the invention, the upper end section rests on the lower end section, so that the force transmission of the upper part of the support to the fastening bolt is direct and that of the lower part of the support to the fastening bolt is indirect via the upper part of the support.

[0020] In addition, the upper part middle section has a raised longitudinally extended upper part flange, which is arranged transversely to the lower part base plane and parallel to the lower part flange and has at least one upper flange bore aligned with the respective lower part flange bore.

[0021] Preferably, each of the two support sections is designed as a longitudinally extended base plate with two lateral cutouts that separate the end sections from the central section. The cutouts extend slightly beyond the central axis. In the central section, the base plate is bent at a right angle transversely to its longitudinal extent, approximately at the line of the ends of the two cutouts and parallel to the central axis, thus creating the vertically rising flange. The height of the flange then corresponds approximately to the width of the portion of the central section that remains in the plane of the base plate together with the end sections.

[0022] The cantilever sword, as a further basic component according to the invention, has a beam-side sword coupling section and a facade-side mounting section.

[0023] The sword coupling section is arranged parallel to the plane between the lower flange and the upper flange. It has at least one sword bore aligned with the flange bores. Preferably, however, there are at least two sword bores spaced at the same distance as the preferably at least two flange bores, so that there are aligned flange and sword bores that can then accommodate the coupling bolts.

[0024] The facade-side mounting section of the cantilever bracket is designed for connecting facade construction components. For this purpose, the mounting section preferably has a suitable arrangement of universal mounting holes. Alternatively, the mounting section could have a jaw-like recess or other shaped sections. Preferably, the cantilever bracket can be designed as a flat steel bar or a plate and may optionally have reinforcing ribs.

[0025] According to the invention, the cantilever beam and the fastening holes are arranged in a common load-bearing plane. This arrangement is in a plane that is vertical and simultaneously transverse to the substructure.

[0026] This significantly increases the mechanical load-bearing capacity of the console.

[0027] The inner thermal break pair, as a further basic component according to the invention, comprises a first and a second thermal break layer. The two break layers rest on both sides of the cantilever beam on its beam coupling section, with the first thermal break layer specifically located between the lower flange and the beam coupling section, and the second thermal break layer between the beam coupling section and the upper flange. The break layers are designed for thermal separation between the support components and the cantilever plate. For this purpose, they are made of a material with lower thermal conductivity compared to the other components but sufficient compressive strength, for example, plastic. Preferably, the thermal conductivity is less than 1 W / mK, and particularly preferably less than 0.2 W / mK. The surface pressure values ​​can be optimized by appropriately dimensioning the flanges and the break layers.

[0028] The coupling bolt arrangement of the console according to the invention comprises at least one coupling bolt. The number of coupling bolts is determined by the number of paired flange bores. The coupling bolts each pass through the flange bores and the respective corresponding sword bore. The separating layers can also have corresponding bores or mouth-like openings to receive the passing coupling bolts.

[0029] The coupling bolts can be designed as rivets or as a screw-nut assembly. The coupling bolts create a positive-locking connection between the two support components, the cantilever beam and the thermal break layer pair. Furthermore, the surface pressure between the thermal break layers and the surfaces of the adjacent flanges or beam coupling section creates a frictional connection, thus enabling force transmission.

[0030] The coupling thus created advantageously enables a reliable force transmission between the cantilever beam and the support components while simultaneously minimizing heat transfer between the support components on the one hand and the cantilever beam on the other.

[0031] The facade substructure console according to the invention has in particular the advantages described below.

[0032] Advantageously, an internal thermal decoupling is provided, so that heat transferred from the substructure to the supporting elements - which only protrude slightly into the thermal insulation layer of the facade and are therefore largely located in the warm zone - is only transferred to the cantilever beam and thus further through the thermal insulation layer to the outside of the facade to a small extent.

[0033] A further advantage is the high mechanical load-bearing capacity. This is due in part to the very stable coupling between the support components and the cantilever beam, as well as the arrangement of the force applications in a common load-bearing plane.

[0034] The solution according to the invention means that the material of the thermal separation layers is only subjected to mechanical pressure, so that cost-effective material with low thermal conductivity can be selected.

[0035] Furthermore, the high level of safety is advantageous because, due to the coupling bolts passing between the two flanges and the sword coupling section, a positive-locking coupling remains even in the event of a mechanical or other failure of the thermal separation layer arrangement, including in the event of fire.

[0036] Furthermore, the thickness of the inner thermal break layers can be advantageously and structurally easily selected differently depending on the application by adjusting the length of the coupling bolts. For special cases, an asymmetrical thickness of the thermal break layers is also possible.

[0037] Further advantages include its structural simplicity and robustness. Both the support components and the cantilever beam can be manufactured from simple flat steel or sheet material. For larger quantities, the support components can also be produced as bent-stamped parts. Standard commercial components such as rivets or bolts with nuts can be used for the coupling bolts.

[0038] In an advantageous further development, the facade substructure console is characterized in that an external thermal separation layer is arranged on the underside of the base plate and is designed for thermal separation between the substructure and the support parts.

[0039] This advantageously provides a solution with double thermal separation. Beyond the internal thermal break, heat transfer between the substructure, particularly an exterior building wall, and the supporting components is further reduced. Furthermore, the outer thermal break layer is advantageously subjected solely to compressive stress and will not lead to mechanical failure of the facade structure, even in the event of a fire.

[0040] Furthermore, according to a supplementary advantageous development, it is possible to provide an additional simple, flat thermal break layer at the facade-side mounting section of the cantilever beam when connecting the further facade construction, thus enabling triple thermal separation with minimal effort. In one variant, the cantilever beam can be prefabricated with a double-sided, full-surface separation layer coating, so that the inner thermal break layer arrangement at the beam coupling section and, at the same time, an additional thermal break layer at the mounting section are provided, further simplifying the installation.

[0041] According to a further advantageous embodiment, the facade substructure bracket is characterized by the fact that the support components and the cantilever bracket are made of stainless steel, for example V2A. This provides both exceptional corrosion resistance and reduced thermal conductivity compared to aluminum or steel.

[0042] According to a further advantageous embodiment, the facade substructure bracket is characterized in that the cantilever bracket has at least one heat-conduction-reducing cross-sectional recess. This cross-sectional recess reduces the cross-section available for heat conduction, thereby advantageously further reducing heat loss from the building wall.

[0043] Preferably, the cross-sectional recess is located in the half on the side of the beam, and particularly preferably near the beam-side sword coupling section. This advantageously reduces heat conduction close to the warm substructure and further stabilizes the cantilever sword in the slightly weakened cross-sectional area through the beam sections connected there.

[0044] Preferably, the reduction in cross-section due to the cross-sectional recess is at least 40%, and particularly preferably at least 50%, of the total cross-section that would exist without the cross-sectional recesses in this section of the cantilever beam. The cross-sectional recess can be formed from several partial recesses or as a single piece. Advantageously, it can be a simple punched-out section.

[0045] According to a further advantageous development, the facade substructure console is characterized by the fact that the lower support part and the upper support part are identical in construction.

[0046] According to this training, the manufacturing process can be carried out particularly cost-effectively, as no different carrier parts need to be manufactured.

[0047] Since the upper beam section rests on the end sections of the lower beam section, the flange bore of the upper section is offset from the flange bore of the lower section by the material thickness of the beam sections at their end sections. Therefore, in this further development, the flange bores are preferably made as elongated holes or, for simplicity, with a larger diameter. Alternatively, with otherwise identical beam sections, only the distance of the flange bores from the respective base plane can be chosen differently. In the lower beam section, the distance between the base plane of the lower beam section and the flange bore of the lower beam section is then greater by the material thickness of the upper beam section than the corresponding distance in the upper beam section.

[0048] According to a further advantageous embodiment, the facade substructure bracket is characterized by the fact that the fastening holes are designed as elongated slots to accommodate different thicknesses of the inner thermal break layers. This embodiment is based on the fact that the distance between the flanges of the two support members varies depending on the material thickness of the inner thermal break layers and the material thickness of the cantilever beam. Even without having to specifically adapt the geometry of the central section of the support members, this embodiment advantageously ensures that the fastening holes are aligned even with different material thicknesses, thanks to the superimposed elongated slots.

[0049] The invention is described as an embodiment by reference to Fig. 1 Overall view Fig. 2 Exploded view of the entire scene Fig. 3 Support components in individual view Fig. 4 Supporting component as a front-end component Fig. 5 Overall view with cross-sectional recess explained in more detail.

[0050] In this context, identical reference symbols in different figures refer to the same features or components. These reference symbols are used in the description even if they are not shown in the figure in question.

[0051] The Fig. 1 and the Fig. 2 The same embodiment is shown in different representations and is explained together below.

[0052] The lower support section 10 and the upper support section 20 together form the basic component, which is intended to be attached to the substructure, in particular to an exterior building wall. To reduce heat transfer, an external thermal break layer 80 is arranged on the lower support section 10, which is intended to rest flat against the substructure. The two support sections 10 and 20 are firmly connected to each other by means of the coupling bolt arrangement 50, which in this embodiment consists of three coupling bolts 51. In this embodiment, the coupling bolts 51 are designed as rivets.The coupling bolts 51 pass through the respective upper flange bore 62, then through a hole in the second thermal break layer 42 of the inner thermal break layer pair 40, then through the respective sword bore 63 of the sword coupling section 31, further through a hole in the first thermal break layer 41 of the inner thermal break layer pair 40, and finally through the respective lower flange bore 61. The second thermal break layer 42 is fixed across its surface between the upper flange 24 and the sword coupling section 31, and the first thermal break layer 41 is fixed across its surface between the sword coupling section 31 and the lower flange 14.The inner thermal break pair 40 further reduces heat conduction between the support elements 10, 20, which are already thermally separated from the substructure, to the cantilever beam 30, so that only minimal heat loss is possible through surface conduction or via facade elements mounted on the facade-side mounting section 32. Both the support elements 10, 20 and the cantilever beam are made of stainless steel sheet and are therefore corrosion-resistant and have comparatively low thermal conductivity. In this embodiment, the outer thermal break layer 80 and the inner thermal break layers 41, 42 are made of foamed PVC.

[0053] Fig. 3 und Fig. 4 show further details of the support parts 10, 20.

[0054] In this embodiment, both support parts are designed identically. The lower support part 10 has the lower section middle section 13, followed by the first lower section end section 11 and the second lower section end section 12. Similarly, the upper support part 20 has the upper section middle section 23, followed by the first upper section end section 21 and the second upper section end section 22. In the finished assembly state, the first upper section end section 21 overlaps the first lower section end section 11, and the second upper section end section 22 overlaps the second lower section end section 12, so that the upper and lower mounting holes 71, 72, which in this embodiment are designed as elongated holes, are aligned and can each accommodate a mounting screw for insertion into the substructure.In the lower support part 10, the lower part flange 14 projects orthogonally from the common lower part base plane 15, and in the upper support part 20, the upper part flange 24 projects orthogonally from the common upper part base plane 25. The outer thermal break layer 80 is arranged on the underside 16 of the lower part base plane in the finished assembly state.

[0055] How in particular Fig. 4 As shown, both support parts 10, 20 are manufactured as metal plates, in which, after the introduction of two lateral incisions in the middle part, an upstand is created to produce the respective flange 14, 24. Fig. 4 shows the metal plates in a top view before they are bent up.

[0056] Furthermore, it shows Fig. 5A modified embodiment in which the cantilever wing 30 has a heat-conduction-reducing cross-sectional recess 33 formed by two round cutouts. The round shape advantageously avoids notch stresses, and the load-bearing capacity is only marginally reduced in relation to the significant reduction in heat conduction. In the embodiment shown here, the cross-sectional recess 33 reduces the overall cross-section in this section – indicated by the dashed line – by more than 50%. Furthermore, the cross-sectional recess 33 is arranged in the immediate vicinity of the wing coupling section 31; thus, the cantilever wing is additionally supported in the section of the cross-sectional recess by the coupled support elements, counteracting buckling. Reference symbols used

[0057] 10 Support base 11 First subdivision end section 12 Second subdivision end section 13 Subdivision middle section 14 Subdivision flange 15 Subdivision base level 16 Subdivision base level underside 20 Top section 21 First top section end section 22 Second top section end section 23 Top section middle section 24 Top section flange 25 Top section base level 30 Cantilever blade 31 Blade coupling section 32 Facade-side mounting section 33 Cross-sectional recess 40 Inner thermal separation layer pair 41 First thermal separation layer 42 Second thermal separation layer 50 Coupling bolt arrangement 51 Coupling bolt 61 Lower flange bore 62 Upper flange bore 63 Sword bore 71 lower mounting holes 72 upper mounting holes 80 outer thermal separation layer

Claims

1. A facade substructure bracket, comprising two supporting elements (10, 20), a cantilever blade (30), an inner thermal separation layer pair (40), and a coupling bolt arrangement (50), wherein the lower supporting element (10) comprises a first and a second lower-element end segment (11, 12) and a lower-element centre segment (13), wherein the lower-element segments (11, 12, 13) form a common lower-element base plane (15) that comprises a lower-element base plane underside (16) designed for plane-parallel contact with a substructure, wherein the lower-element end segments (11, 12) are arranged in a longitudinal extension on both sides of the lower-element centre segment (13) and each is provided with a lower fastening bore hole (71), wherein the lower-element centre segment (13) comprises an up-edged, longitudinally running lower-element flange (14) that is arranged transversely to the lower-element base plane (15) and has at least one lower-element flange bore hole (61), wherein the upper supporting element (20) comprises a first and second upper-element end segment (21, 22) and an upper-element centre segment (23), wherein the upper-element segments (21, 22, 23) form a common upper-element base plane (25) parallel to the common lower-element base plane (15), wherein the upper-element end segments (21, 22) are arranged in a longitudinal extension on both sides of the upper-element centre segment (23) and each is provided with an upper fastening bore hole (72), wherein the first upper-element end segment (21) rests flat on the first lower-element end segment (11) and the second upper-element end segment (22) rests flat on the second lower-element end segment (12), and wherein the fastening bore holes (71, 72) are aligned such that they have a common centre axis and are designed to accommodate a fastening bolt to be fastened to the substructure, wherein the upper-element centre segment (23) has an up-turned, longitudinally-running upper-element flange (24) which is arranged transversely to the upper-element base plane (25) and plane-parallel to the lower-element flange (14) and has at least one upper-element flange bore hole (62) aligned with the lower-element flange bore hole (61), wherein the cantilever blade (30) comprises a blade coupling section on the supporting side (31) and a blade mounting section on the facade side (32), wherein the blade coupling section on the supporting side (31) is arranged in a plane-parallel manner between the lower-element flange (14) and the upper-element flange (24) and has at least one blade bore hole (63) aligned with the flange bore holes (61, 62), wherein the mounting section on the facade side (32) is designed for coupling facade construction parts, and wherein the cantilever blade (30) and the fastening bore holes (71, 72) are arranged in a common load-transfer plane, wherein the inner thermal separation layer pair (40) comprises a first and a second thermal separation layer (41, 42), and the first thermal separation layer (41) is arranged between the lower-element flange (14) and the blade coupling section (31) and the second thermal separation layer (42) is arranged between the blade coupling section (31) and the upper-element flange (24), and the separation layers (41, 42) are designed for thermal separation between the supporting elements (10, 20) and the cantilever blade (30), wherein the coupling bolt arrangement (50) comprises at least one coupling bolt (51) which passes through the bore holes (61, 63, 62) and defines the positional relationship between the supporting elements (10, 20), the cantilever blade (30), and the inner thermal separation layer pair (40) in a form-fit manner.

2. The facade substructure bracket according to claim 1, characterized in that an outer thermal separation layer (80) is arranged on the lower-element base plane underside (16) and is designed to provide thermal separation between the substructure and the supporting elements (10, 20).

3. The facade substructure bracket according to one of the previous claims, characterized in that the supporting elements (10, 20) and the cantilever blade (30) are made of stainless steel.

4. The facade substructure bracket according to one of the previous claims,, characterized in that the cantilever blade (30) has at least one heat conduction-reducing cross-sectional recess (33).

5. The facade substructure bracket according to one of the previous claims, characterized in that the supporting elements (10, 20) are identical in construction.

6. The facade substructure bracket according to one of the precious claims, characterized in that the fastening bore holes (71, 72) are designed as elongated holes for adaptation to different thicknesses of the inner thermal separation layers (41, 42).

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