STRUCTURAL GLAZING CONSTRUCTION

Description

[0001] The present invention relates to a structural glazing construction with a supporting frame and a surface element which is fixed to the supporting frame by means of a circumferential frame-shaped bonding with at least two adhesives.

[0002] German patent DE 10 2017 121 353 A1 discloses a redundant mounting system for bonded facade panels, comprising two bonded joints: an inner and an outer bond, to support the weight of the bonded panels. Should one of the bonded joints fail, the other can absorb the weight. This results in secure mounting of the panels; however, the two circumferential bonded joints require a comparatively large surface area. Furthermore, these bonded joints can only be considered to a limited extent in the static design of the mounting system, and the supporting frame must therefore have a correspondingly large cross-section.

[0003] DE 38 08 978 A1 discloses a frameless glazing unit that is bonded to facade profiles, wherein the glazing is connected to the facade elements via areas made of a highly heat-resistant elastic sealant. Additionally, a continuous load-bearing seal is provided on the outer pane. In the event of a fire, this prevents the glazing unit from falling off as a whole if the load-bearing seal fails, and the glazing is held in place for a period of time by the highly heat-resistant elastic sealant.

[0004] It is therefore an object of the present invention to create a structural glazing construction that enables improved bonding of a surface element to a supporting frame and can withstand high static loads.

[0005] This problem is solved using a structural glazing construction with the features of claim 1.

[0006] The structural glazing construction according to the invention comprises a support frame and a surface element, which is fixed to the support frame by means of a circumferential frame-shaped bond using at least two adhesives. The bond has a first adhesive in the four corners of the support frame, which has a higher stiffness than a second adhesive located between two corners. The first adhesive with higher stiffness ensures a strong bond between the support frame and the surface element, so that loads can also be distributed and transferred via the surface element, thus allowing the support frame to be designed more compactly. The first adhesive creates a stable connection between the support frame and the surface element that is only minimally movable.The second adhesive provides a seal between the support frame and the surface element and is preferably arranged in a strip shape between the areas where the first adhesive is applied.

[0007] Structural glazing constructions within the meaning of the invention include not only facade constructions in the interior and exterior but also door or window elements.

[0008] The elastic modulus of the second adhesive is preferably higher than that of the first adhesive. This makes the second adhesive more flexible. The first adhesive, in particular, has a shear modulus G at room temperature of at least 6.5 MPa, while the second adhesive preferably has a shear modulus G at room temperature of 0.1 to 4 MPa. The shear modulus is measured according to the guideline for European Technical Approval for bonded glass structures ETAG 002, taking into account the third amendment from May 2012.

[0009] Preferably, the coefficient of thermal expansion of the first adhesive differs by less than 20%, and in particular by less than 10%, from the coefficient of thermal expansion of the second adhesive. This prevents gaps from forming between the adhesives in the event of temperature fluctuations.

[0010] The second adhesive consists primarily of silicone and therefore exhibits high elasticity and good sealing properties. The first adhesive, with higher stiffness, preferably comprises polyurethane, an acrylic resin, or an epoxy resin. Alternatively or additionally, the first adhesive may include an adhesive tape to ensure stable fixation of the surface element.

[0011] The first and second adhesives preferably form an elongated adhesive strip with a width of 2 mm to 12 mm, particularly 3 mm to 9 mm. This width extends parallel to the plane of a surface element on the support frame. The thickness of the adhesive strip can be, for example, 2 mm to 6 mm, particularly 3 mm to 5 mm. The elongated adhesive strip has a substantially rectangular cross-section. Optionally, the first and second adhesives can have the same thickness. Preferably, the first adhesive, which has higher stiffness, is thinner than the second adhesive, which has lower stiffness.

[0012] The first adhesive element is preferably provided in each corner with two angled legs, one leg of which is bonded to a profile of the support frame. The length of the legs of the first adhesive element can be between 5% and 25% of the distance to the next corner, i.e., the distance between two adjacent corners.

[0013] In a further embodiment, the first adhesive is embedded within the second adhesive. The first adhesive can be located in an inner area of ​​the bond, while the second adhesive surrounds the first adhesive on its outer surface relative to the support frame. The first adhesive can cover an area of, for example, between 1 cm² and 150 cm² at each corner to ensure stable fixation of the surface element.

[0014] In a direction perpendicular to the plane of the surface element, the first adhesive layer can be thinner than the second, resulting in slight elasticity in the area of ​​the first adhesive layer. A spacer can be mounted or incorporated on the surface element and / or the support frame for this purpose.

[0015] The surface element preferably comprises a glass pane, in particular a glass pane that is part of an insulating glass unit, which is bonded to the support frame. The support frame can be made of metal profiles, in particular aluminum, or of plastic or a composite material. For a compact design, the width of the support frame profiles is preferably between 6 mm and 18 mm, in particular between 6 mm and 12 mm.

[0016] Optionally, the bonding can also include more than two adhesives, i.e., three, four or more adhesives that differ in their properties.

[0017] The invention is explained in more detail below with reference to several exemplary embodiments and the accompanying drawings. These show: Figure 1 shows a view of an adhesive bond for a structural glazing construction; Figures 2A to 2D show several detailed views of an adhesive bond in a corner area in different variations; Figure 3 shows a sectional view through an adhesive bond of a structural glazing construction, and Figure 4 shows a sectional view through a structural glazing construction in a corner area.

[0018] A structural glazing construction 1 includes an adhesive bond to fix a surface element, for example, a glass pane of an insulating glass unit, to a supporting frame. The supporting frame comprises four corner areas for rectangular surface elements, whereby the shape of the surface elements and the supporting frame can also be designed differently.

[0019] In Figure 1The bonding arrangement shown includes a first adhesive 2 positioned at the four corners, and a strip-shaped second adhesive 3 located between two corners containing the first adhesive 2. The first adhesive 2 is angled and comprises two legs, the longitudinal leg being longer than the transverse leg. The support frame has a longitudinal length H and a width W perpendicular to it. The longitudinal length of the legs of the first adhesive 2 preferably corresponds to a range between 5% and 25% of the length H and 5% and 25% of the width W.

[0020] In Figure 2A is a corner area of ​​the bonding of the Figure 1The first adhesive 2 comprises a longitudinal leg 4 and a leg 5 perpendicular to it, wherein the legs 4 and 5 have the same width as the strip-shaped second adhesive 3. The second adhesive 3 preferably comprises a silicone, in particular a structural silicone, for bonding glass and aluminum. The tensile strength of the second adhesive 3 is preferably greater than 0.14 MPa, the shear strength is greater than 0.105 MPa, and the modulus of elasticity is greater than or equal to 1.4 MPa, calculated according to ETAG 002.

[0021] The first adhesive has a higher stiffness than the second and comprises a polyurethane, acrylic resin, and / or epoxy resin, and is suitable for bonding glass and aluminum. Its shear modulus G is greater than 6.5 MPa at room temperature. Alternatively, a double-sided adhesive tape can be used as the first adhesive, which also has a shear modulus G greater than 6.5 MPa.

[0022] In the Figures 2B to 2E Various methods for applying the first adhesive are shown. Figure 2B The second leg 5 was omitted, so that the first adhesive is only provided as leg 4 in the form of a strip in the corner area of ​​the bond.

[0023] In Figure 2CThe bond with the first adhesive is angled, with two legs 6 and 7 that are narrower than the second adhesive 3. Legs 6 and 7 are embedded in the second adhesive, and strips 8 and 9 surround the first adhesive on the outside, relative to the support frame. This allows for improved sealing to the outside.

[0024] In 2D Figure is opposite Figure 2C Leg 7 has been omitted, and the first adhesive is similar Figure 2B It was only applied in strips.

[0025] In Figure 2EA modified embodiment is shown in which the first adhesive is applied at an angle with two legs 6' and 7', which, however, do not have the same width along their length, but taper outwards in a wedge shape. Modified strips 8' and 9' of the second adhesive are provided on the outside of the legs 6' and 7' of the first adhesive, so that here too the first adhesive is embedded in the second adhesive on the outside.

[0026] In Figure 3 Figure 1 shows a sectional view through a structural glazing construction 1, which displays a support frame 10 made of metal or plastic, in particular aluminum, composed of several profiles. A surface element in the form of an insulating glass unit 20 is fixed to the support frame 10 via an adhesive bond. Figure 3Figure 1 shows a section in the area of ​​the second adhesive 3, i.e., in a central area between the corners. The adhesive 3 holds the insulating glass unit 20 to the support frame 10, whereby a sealing profile 15 is provided on an inner side of the support frame 10, which, for example, has a thickness d between 6 and 12 mm.

[0027] In Figure 4 A section through the structural glazing construction 1 in a corner area is shown, similar to the Figures 2C and 2D In the outer area, the second adhesive 3 is provided in the form of a strip, while a first adhesive 2 is provided on the inner side. The first adhesive 2 is thinner than the second adhesive 3, for which purpose a strip 11 is fixed to the support frame 10 by means of fastening means 12, so that a stepped structure is provided on the support frame 10.

[0028] Strip 11 can optionally also be a double-sided adhesive or tape, which then forms a third adhesive. This third adhesive can have technical properties that differ from those of the first and second adhesives. For example, its stiffness can be between that of the first adhesive 2 and the second adhesive 3.

[0029] The first adhesive 2 bonds the strip 11 to the inner glass pane of the insulating glass unit 20. The first adhesive 2 thus has a thickness b of only 2 mm to 5 mm and is therefore thinner than the second adhesive. Optionally, the first adhesive 2 and the second adhesive 3 can also have the same thickness if the stepped structure on the support frame 10 is omitted. Reference symbol list

[0030] 1 Structural glazing construction 2 Adhesive 3 Adhesive 4 Leg 5 Leg 6, 6' Leg 7, 7' Leg 8, 8' Strip 9, 9' Strip 10 Support frame 11 Strip 12 Fastener 15 Sealing profile 20 Insulating glass pane b Thickness d Thickness HL Length W Width

Claims

1. Structural glazing construction (1) with a support frame (10) and a panel element, which is fixed to the support frame (10) via a circumferential frame-shaped bonding with at least two adhesives, characterized in that the bonding in the four corners of the support frame (10) has a first adhesive (2), which has a higher rigidity than a second adhesive (3), which is arranged between two corners.

2. Structural glazing construction according to claim 1, characterized in that the modulus of elasticity of the second adhesive (3) is higher than the modulus of elasticity of the first adhesive (2).

3. Structural glazing construction according to claim 1 or 2, characterized in that the first adhesive (2) has a shear modulus G at room temperature of at least 6.5 MPa.

4. Structural glazing construction according to one of the preceding claims, characterized in that the second adhesive (3) has a shear modulus G at room temperature of between 0.1 and 4 MPa.

5. Structural glazing construction according to one of the preceding claims, characterized in that the coefficient of expansion of the first adhesive (2) is less than 20% different from the coefficient of expansion of the second adhesive (3).

6. Structural glazing construction according to one of the preceding claims, characterized in that the second adhesive (3) comprises silicone.

7. Structural glazing construction according to one of the preceding claims, characterized in that the first adhesive (2) comprises a polyurethane, acrylic resin or epoxy resin and / or an adhesive tape.

8. Structural glazing construction according to one of the preceding claims, characterized in that the profiles of the support frame (10) have a width between 6 mm and 18 mm, preferably 6 mm and 12 mm..

9. Structural glazing construction according to one of the preceding claims, characterized in that the first adhesive (2) comprises two angularly arranged legs (4, 5) at each corner.

10. Structural glazing construction according to claim 9, characterized in that the legs (4, 5) have a length of between 5 % and 25 % of the distance to a nearest corner.

11. Structural glazing construction according to one of the preceding claims, characterized in that the first adhesive (2) and the second adhesive (3) form an oblong adhesive strip having a width between 2 mm and 12 mm, in particular 3 mm to 9 mm.

12. Structural glazing construction according to one of the preceding claims, characterized in that the first adhesive (2) is provided only in an inner region of the bonding and the second adhesive (3) surrounds the first adhesive (2) on an outer side.

13. Structural glazing construction according to one of the preceding claims, characterized in that the first adhesive (2) covers an area of between 1 cm2 and 150 cm2 at each corner.

14. Structural glazing construction according to one of the preceding claims, characterized in that in a direction perpendicular to a plane of the panel element (20), the first adhesive (2) is thinner than the second adhesive (3).

15. Structural glazing construction according to one of the preceding claims, characterized in that the panel element comprises an insulating glass pane (20) which is bonded to the support frame (10).