Adjustable anchoring device for facade elements

Abstract

Anchoring device for fastening facade elements (16) to a building wall, in particular during the renovation of existing buildings, comprising: a) an anchor plate (3) for mounting on the building wall; b) a supporting structure (5, 8, 9) projecting from the anchor plate (3) for supporting an upper facade element (16); c) wherein the support structure has a first adjustment mechanism (9) for adjusting the vertical height of the upper facade element (16); d) wherein the support structure further comprises a second adjustment mechanism for adjusting the horizontal depth of the upper facade element (16) relative to the building wall, wherein this second adjustment mechanism comprises at least one sheet (8) with an elongated hole, which is movably connected to another part (5) of the support structure via a fastening means (7) guided through the elongated hole in order to be fixed after adjustment has been carried out; characterized in that e) the device further comprises a mounting rail (1) arranged on the anchor plate (3) below the supporting structure, which mounting rail is designed to engage with a corresponding connecting tab (2) of a second, lower-arranged façade element in order to fix it horizontally and at the same time to allow a vertical movement to absorb thermal expansion.

Description

Subject of the invention

[0001] The present invention relates to an anchoring device for fastening facade elements to a building wall, in particular for attaching heavy, prefabricated facade elements in the context of the serial renovation of existing buildings. Technological background

[0002] In the field of construction technology, especially in the renovation of building facades, there is a growing need for efficient and easy-to-install systems. This is especially true for the serial renovation of prefabricated buildings, such as the WBS 70 type, which was widely used in the former GDR. The exterior walls of these buildings typically consist of three-layer precast concrete elements, comprising an inner load-bearing layer, an insulation layer, and an outer weather protection layer. During renovation work, the outer weather shell is often cut back to attach new facade elements directly to the load-bearing concrete layer. A major challenge here is the significant construction tolerances and unevenness of the concrete surfaces that arose during the manufacture of the wall elements and during installation.

[0003] Conventional renovation methods such as external thermal insulation composite systems (ETICS) or classic ventilated facades (VHF) are often associated with longer construction times than required for the rapid assembly of heavy, large-format and prefabricated facade elements, for example made of wood.

[0004] Adjustable brackets are known from the prior art. European patent EP 2 397 622 A1 discloses a bracket arrangement that allows height and depth adjustment to compensate for construction tolerances. The set position is fixed purely mechanically by tightening screws, creating a force-locking clamp connection between the wall bracket and the bracket plate. Such purely mechanical connections can have disadvantages, as they are only suitable for transferring vertical loads and cannot divert horizontal loads caused by wind. Furthermore, the solution described in EP 2 397 622 A1 is primarily designed for new construction, where anchor points, e.g., cast-in threaded sleeves, are already provided during the construction of the shell.It is less suitable for the high loads and the specific requirements of the renovation of old concrete walls, where the fixing points have to be installed subsequently.

[0005] The use of a hardening compound for the final, play-free fixation of the adjustable components of the bracket, even after adjustment, is unknown in the prior art. Furthermore, the prior art does not disclose an integrated solution specifically designed for the challenges of serial renovation with heavy, stacked facade elements. In particular, a device is missing that simultaneously supports an upper element and fixes the upper end of an underlying element while absorbing its thermal expansion without constraints.

[0006] The object of the present invention is to overcome the disadvantages of the prior art and to provide an improved anchoring device for facade elements, particularly suitable for the serial renovation of existing buildings with heavy, prefabricated elements. The device should enable simple, precise three-dimensional adjustment and, after alignment, ensure a permanent, absolutely play-free and settlement-proof connection that safely transfers high loads into the building structure. Description of the invention

[0007] The object of the invention is achieved by the subject matter of the independent claims. Preferred developments are the subject matter of the dependent claims.

[0008] The present invention discloses an anchoring device that combines precise, multi-axis adjustability with a permanent, settlement-proof final fixation. The device has a modular design and essentially consists of a bracket to be attached to the wall, adjustment mechanisms, and an integrated bracket for underlying facade elements.

[0009] In a preferred embodiment, the anchoring device comprises an anchor plate 3, which has a thickness preferably between 12 mm and 18 mm, more preferably between 14 mm and 16 mm, and in particular 15 mm, and dimensions in the range of 400-440 mm x 270-310 mm, preferably 410-430 mm x 280-300 mm, and in particular 420 mm x 290 mm. This is fastened to the load-bearing layer 15 of the building wall 17 by means of anchor rods 6. The anchor plate 3 serves to distribute the external load evenly over a large area into the anchor rods 6 and thus into the anchoring base. An optional adjusting anchor 13 can facilitate installation by providing a third fastening point for the precise alignment of the anchor plate 3 to the existing wall.Welded to the anchor plate 3 is a connecting plate 5, which preferably has a thickness between 11 mm and 17 mm, more preferably between 13 mm and 15 mm, and in particular 14 mm, and has dimensions in the range of 275-315 mm x 170-210 mm, preferably 285-305 mm x 180-200 mm, and in particular 295 mm x 190 mm. This protrudes as a cantilevered component to bridge the gap between the supporting layer 15 and the facade elements 16. To increase the rigidity and to ensure a high load-bearing capacity, this connecting plate 5 is supported against the anchor plate 3 by a diagonal 4 which is also welded on and which has a thickness preferably between 8 mm and 12 mm, more preferably between 9 mm and 11 mm and in particular 10 mm and has dimensions in the range of 135-155 mm x 102-122 mm, preferably 140-150 mm x 107-117 mm and in particular 145 mm x 112 mm.This construction forms an extremely stable, triangular support structure that efficiently absorbs the vertical loads of the facade element 16 and transfers them to the anchor plate 3. The use of steel, particularly the common and economical grade S235, for these load-bearing components 3, 4, 5, and 8 ensures sufficient load-bearing capacity with good weldability and cost-effectiveness, which is particularly advantageous in serial renovation projects.

[0010] The device further comprises adjustment mechanisms for three-dimensional alignment. A first adjustment mechanism 9 serves to adjust the vertical height of the facade element 16. This preferably consists of a threaded bolt-nut-adjusting washer arrangement arranged on the mounting plate 8, preferably of size M10 to M16, in particular M12, which supports a support plate 10. The support plate 10, which is connected to the underside of the facade element 16, serves to protect the lower flange of the facade element 16. It has a thickness preferably between 1.5 mm and 3 mm, more preferably between 1.8 mm and 2.2 mm, and in particular 2 mm, and has dimensions in the range of 90-110 mm x 90-110 mm, preferably 95-105 mm x 95-105 mm, and in particular 100 mm x 100 mm.The technical advantage of this arrangement is that it enables sensitive and precise leveling of the heavy facade element 16, even under load, which is essential for an exact and flush facade appearance. A slotted hole in the support plate 10 can also allow for horizontal tolerance compensation parallel to the facade.

[0011] A second adjustment mechanism is used for horizontal depth adjustment perpendicular to the facade. This is formed by a mounting plate 8, which has a thickness preferably between 8 mm and 12 mm, more preferably between 9 mm and 11 mm, and in particular 10 mm, and dimensions in the range of 160-180 mm x 117-137 mm, preferably 165-175 mm x 122-132 mm, and in particular 170 mm x 127 mm. This is connected to the connecting plate 5 via welded threaded bolts 7, preferably of size M10 to M16, in particular M12, which ensure force transmission. The threaded bolts 7 penetrate oversized elongated holes in the mounting plate 8 with a diameter in the range of 15 mm to 22 mm, preferably 17 mm to 19 mm, and in particular 18 mm.The technical advantage of this slotted guide is that it enables continuous tolerance compensation of construction tolerances and unevenness of the existing wall of up to 6 cm, preferably up to 5 cm and especially up to 4 cm.

[0012] Once adjusted, this connection is permanently fixed. Two alternative designs are provided for this purpose.

[0013] In the primarily preferred embodiment, the cavity within the elongated hole is designed to be filled with a hardenable compound 14 after the final depth adjustment has been made. An injection resin is preferably used for this purpose. The decisive technical advantage of this solution is the creation of a permanent, absolutely rigid, force- and form-fitting connection. Curing creates a monolithic block that eliminates any play and distributes loads evenly over a large area, thus avoiding stress peaks. This is superior to a purely mechanical clamp connection because it eliminates the risk of loosening due to vibration or settlement (creep). Furthermore, there is no need for complex torque control of the screws on site, which simplifies assembly and increases process reliability.The use of injection resin is advantageous because it is a proven material with defined and fast curing times.

[0014] In an alternative embodiment of the invention, the permanent fixation of the adjusted position is achieved by a mechanical clamp screw connection instead of the hardening compound. In this variant, the second adjustment mechanism is designed so that after the final positioning of the facade element, a force-locking connection is created by tightening screws. The technical advantage of this alternative lies in the fact that it represents a purely mechanical solution that does not require special materials such as injection resin and associated equipment. It can be implemented using standard tools and, thanks to the high friction force between the mounting plate 8 and the connecting plate 5, also ensures permanent and secure fixation of the adjusted position.

[0015] A central feature of the invention is the integrated holder for the underlying facade element. For this purpose, the device has a mounting rail 1 fastened to the anchor plate 3, for example a stainless steel rail of the WM 40 / 22 type with a length in the range of 80 mm to 120 mm, preferably 90 mm to 110 mm and in particular 100 mm. This is designed to accommodate a corresponding connecting tab 2, which is made of a sheet metal with a thickness preferably between 3 mm and 5 mm, more preferably between 3.5 mm and 4.5 mm and in particular 4 mm. The technical advantage of this integrated component is its dual function: It securely fixes the lower facade element 16 against horizontal loads (wind pressure and suction) and at the same time allows it to move vertically within the mounting rail 1.In this way, thermally induced length changes of the facade element 16 are absorbed without constraint, preventing stresses in the structure. To ensure the longevity of this movable connection, the mounting rail 1 and the connecting bracket 2 are preferably made of stainless steel. The advantage of this material selection is the prevention of frictional or contact corrosion, which could occur on a galvanized surface due to constant movement and impair its function.

[0016] The various embodiments and features of the invention mentioned in this application can be advantageously combined with one another, unless otherwise stated in the individual case. Description of the characters

[0017] The invention is explained below in exemplary embodiments with reference to the accompanying drawings. They show: Fig. 1 a perspective view of the assembled anchoring device; Fig. 2 a perspective view of the assembled anchoring device as an exploded graphic; Fig. 3 a detailed front view of the adjustment mechanisms; Fig. 4a / 4b enlarged partial sectional views of the depth adjustment mechanism before (4a) and after (4b) filling with injection resin; and Fig. 5 a schematic side view of the application on a building wall.

[0018] Fig. Figure 1 shows a perspective view of the assembled anchoring device. Visible is the anchor plate 3 with the holes for the anchor rods 6 and the adjusting anchor 13. Attached to this is the cantilevered console structure, consisting of the connecting plate 5, which is stiffened by the diagonal brace 4. The mounting plate 8 is connected to the connecting plate 5 via the threaded bolts 7. On top is the adjusting device 9 with the support plate 10, which serves to support a facade element. In the lower area of ​​the anchor plate 3, the two mounting rails 1 for receiving the connecting lugs 2 of the underlying facade element can be seen. The connecting lugs 2 are shown here with wood screws 11 for fastening to the facade element.

[0019] Fig. Figure 2 shows an exploded view of the device, showing the individual components separately and illustrating their assembly. The separation of the components along the assembly axes shows the arrangement of the anchor plate 3 with the holes for the anchor rods 6 and the adjusting anchor 13. Separate from this, the connecting plate 5 with the welded-on diagonal brace 4 and the welded-on threaded bolts 7 is shown. Also shown is the mounting plate 8 with the elongated holes for the threaded bolts 7 and the welded-on adjusting device 9. Above this is the support plate 10. The lower bracket, consisting of the mounting rails 1, the connecting lugs 2, and the wood screws 11, is also shown as a separate assembly.

[0020] Fig. Figure 3 shows a front view of the device. The mounting plate 8 is shown, positioned above the connecting plate 5 and connected to it by means of threaded bolts 7. The adjusting device 9 is arranged centrally on the mounting plate 8 and projects into an upper facade element 16 located above it. The facade element 16 rests on the support plate 10, which in turn is attached to the facade element 16 by means of wood screws 11. The vertically arranged mounting rails 1 can be seen from the side, which are attached to the anchor plate 3 located behind it. Positioned in the mounting rails 1 are the connecting lugs 2, which have holes for the wood screws 11, which serve to connect to a lower facade element (not shown). The adjusting anchor 13 is also visible centrally.

[0021] Fig. 4a and Fig. 4b show enlarged partial sectional views of the depth adjustment mechanism. In Fig. Figure 4a shows the state before fixing. The threaded bolt 7, which extends from the connecting plate 5, is loosely located in the slotted hole of the mounting plate 8. The gap between the two plates allows horizontal movement for adjustment. Fig. Figure 4b shows the state after fixation. The entire cavity in the slot and the gap between sheets 5 and 8 are completely filled with injection resin 14. After curing, the resin 14 forms a solid, form-fitting block that makes the connection rigid and free of play and evenly transfers the loads.

[0022] Fig.Figure 5 shows a schematic side view of the application. Two anchoring devices arranged one above the other are fastened to a load-bearing layer 15 of the building wall, consisting of several layers 17, by means of anchor rods 6. The upper device supports an upper facade element 16 on its support plate 10. The mounting rail 1 of the upper device engages with the connecting lug 2 of the underlying facade element 16 and fixes it horizontally against wind loads. The connection of the connecting lug 2 to the lower facade element 16 is achieved via an intermediate board 12, with wood screws 11 connecting the connecting lug 2 to the board 12 and further wood screws 11 connecting the board 12 to the facade element 16. The play of the connecting lug 2 in the mounting rail 1 allows the thermal expansion of the lower element to be accommodated vertically without constraints. List of reference symbols 1 mounting rail 2 connection tabs 3 anchor plate 4 diagonal 5 connecting plate 6 anchor rod 7 threaded bolts (for depth adjustment) 8 Mounting plate 9 Adjustment device (for height adjustment) 10 support plate 11 wood screws 12 boards 13 Adjusting anchors 14 Injection resin 15 Load-bearing layer of the building wall 16 facade elements 17 layers of the building wall QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 2 397 622 A1

[0004]

Claims

[1] Anchoring device for fastening facade elements (16) to a building wall, in particular during the renovation of existing buildings, comprising: a) an anchor plate (3) for mounting on the building wall; b) a supporting structure (5, 8, 9) projecting from the anchor plate (3) for supporting an upper facade element (16); c) wherein the support structure has a first adjustment mechanism (9) for adjusting the vertical height of the upper facade element (16); d) wherein the support structure further comprises a second adjustment mechanism for adjusting the horizontal depth of the upper facade element (16) relative to the building wall, wherein this second adjustment mechanism comprises at least one sheet (8) with an elongated hole, which is movably connected to another part (5) of the support structure via a fastening means (7) guided through the elongated hole in order to be fixed after adjustment has been carried out; characterized in that e) the device further comprises a mounting rail (1) arranged on the anchor plate (3) below the supporting structure, which mounting rail is designed to engage with a corresponding connecting tab (2) of a second, lower-arranged façade element in order to fix it horizontally and at the same time to allow a vertical movement to absorb thermal expansion. [2] Anchoring device according to claim 1, characterized by that a cavity within the elongated hole is designed to be filled with a hardenable mass (14) in order to produce a permanent, force- and form-fitting connection. [3] Anchoring device according to claim 2, characterized by that the curable mass (14) is an injection resin. [4] Anchoring device according to claim 1, characterized bythat the second adjustment mechanism has a clamping screw connection which is designed to produce a permanent, force-locking connection. [5] Anchoring device according to one of the preceding claims, characterized by that the supporting structure comprises a projecting connecting plate (5) welded to the anchor plate (3) and that the plate (8) is designed as a mounting plate which has the elongated hole and is adjustably fastened to the connecting plate (5). [6] Anchoring device according to claim 5, characterized by that the connecting plate (5) is supported against the anchor plate (3) by a welded diagonal (4). [7] Anchoring device according to one of the preceding claims, characterized by that the first adjustment mechanism (9) for vertical height adjustment is a threaded bolt-nut-adjusting washer arrangement arranged on the mounting plate (8). [8] Anchoring device according to one of the preceding claims, characterized by that the anchor plate (3), the connecting plate (5) and the mounting plate (8) are made of steel, in particular grade S235. [9] Anchoring device according to claim 1, characterized by that the mounting rail (1) and the corresponding connecting bracket (2) are made of stainless steel. [10] Anchoring device for fastening facade elements (16) to a building wall, comprising: a) an anchor plate (3) for mounting on the building wall; b) a supporting structure (5, 8, 9) projecting from the anchor plate (3) for supporting a facade element (16); c) wherein the support structure has a first adjustment mechanism (9) for adjusting the vertical height of the facade element (16); d) wherein the supporting structure further comprises a second adjustment mechanism for adjusting the horizontal depth of the facade element (16) relative to the building wall, wherein this second adjustment mechanism comprises at least one sheet (8) with an elongated hole, which is movably connected to another part (5) of the supporting structure via a fastening means (7) guided through the elongated hole; characterized in that e) the cavity within the elongated hole is designed, after the final depth adjustment, to be filled with a hardenable mass (14) in order to produce a permanent, force- and form-fitting connection between the sheet metal (8) and the other part (5) of the supporting structure. [11] Anchoring device according to claim 10, characterized by that the curable mass (14) is an injection resin. [12] Anchoring device according to claim 10 or 11, characterized bythat the supporting structure comprises a projecting connecting plate (5) welded to the anchor plate (3) and that the plate (8) is designed as a mounting plate which has the elongated hole and is adjustably fastened to the connecting plate (5). [13] Anchoring device according to one of claims 10 to 12, characterized by that the first adjustment mechanism (9) for vertical height adjustment is a threaded bolt-nut-adjusting washer arrangement arranged on the mounting plate (8). [14] Anchoring device according to one of claims 10 to 13, characterized by in that it further comprises a mounting rail (1) fastened to the anchor plate (3), which is designed to engage with a corresponding connecting tab (2) of a second, lower-lying facade element in order to fix it horizontally and at the same time to enable a vertical movement to absorb thermal expansion. [15] Anchoring device according to one of claims 10 to 14, characterized by that the connecting plate (5) is supported against the anchor plate (3) by a welded diagonal (4). [16] Anchoring device according to one of claims 10 to 15, characterized by that the anchor plate (3), the connecting plate (5) and the mounting plate (8) are made of steel, in particular grade S235. [17] Anchoring device according to claim 14, characterized by that the mounting rail (1) and the connecting bracket (2) are made of stainless steel.

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