Assembly comprising a supporting device for a vertical building part

Abstract

The invention relates to an assembly comprising a supporting device (3) for a vertical building part (1) which is a prefabricated wall or a column, and a solid supporting part (2), wherein the supporting device is provided for supporting the vertical building part (1) above the solid supporting part at a defined height and wherein the supporting device (3) comprises a threaded nut (5) and a threaded pin (6) in threaded engagement therewith. The vertical building part (1) rests from above on a bearing plate (7) belonging to the supporting device (3), which bearing plate is arranged at the upper end of the threaded pin (6) and is connected thereto, wherein the threaded pin (6) projects upwards out of the threaded nut (5), and wherein the threaded nut (6) is anchored directly in a bore (4) which extends from the upper side of the solid supporting part (2) downwards into the latter.

Description

[0001] SE

[0002] Assembly comprising a support structure for a vertical building component

[0003] The invention relates to an assembly comprising a solid load-bearing part of a building, a vertical building part and a support device, wherein the support device is provided to position the vertical building part, which is a prefabricated wall or a column, above the solid load-bearing part at a defined height.

[0004] In this document, the phrase "massive load-bearing part of a building" refers to a part of the building constructed from building materials, which is typically already part of the structural shell, for example, a building ceiling, a foundation slab, a wall, or a column. The phrase "vertical building part" refers to a prefabricated partition wall or a column of a building.

[0005] In general, prefabricated walls of a building do not stand directly on the solid load-bearing part of the building located on their underside, but on a thin intermediate layer, which normally consists at least predominantly of mortar, and serves to compensate for inaccuracies in the height and angle alignment and the flatness of the upper side of the solid load-bearing part, to form a precisely defined horizontal bearing surface for the prefabricated walls, and to fill gaps between the solid load-bearing part and the prefabricated walls.

[0006] According to a widely used procedure, on the surface of a solid load-bearing part of a building, onto which a vertical building element is later to be erected, one or more stacks of wedges or thin plates are formed. The uppermost surface of these wedges or plates is as horizontal as possible and lies precisely in the plane in which the lower end face of the vertical building element is to rest. These wedges or plates are sometimes glued together. Mortar in a slurry-like consistency is applied to the exposed portion of the upper surface of the solid load-bearing part that will be covered by the vertical building element. The vertical building element is then placed onto the stacks in the appropriate position. The weight of the vertical building element presses the mortar to the correct thickness.After some time, the mortar hardens and forms the desired, suitable load-bearing intermediate layer between the solid load-bearing element and the vertical building component. In practice, however, this method presents significant problems because, under the harsh conditions on the construction site, it is very difficult and time-consuming to ensure that the stacks are still in the correct position and at the correct height when the vertical building component is actually placed upon them.

[0007] As a remedy, threaded rods are used in an increasingly common procedure. These rods are anchored in the massive load-bearing structure at the points where a vertical building element is to be attached, and extend vertically from it. A nut is screwed onto each threaded rod, and a large washer, through which the threaded rod passes, is placed on top of the nut. The nuts are then screwed up or down so that the top of the washer is exactly at the height at which the underside of the vertical building element will later be. The vertical building element is provided with holes at those points on its lower end face where it would otherwise collide with the threaded rods. These holes accommodate the upper projection of the threaded rods.After applying a thick mortar between the threaded rods, the vertical building section is placed onto the discs from above, with its lower end face leading, and the threaded rods protruding into the aforementioned holes. This method results in greater accuracy and more comfortable operation than the previously described method. However, it has the disadvantage that the vertical building section is attached to the SE.

[0008] The areas where the threaded rods are located must be drilled. This leads to more complex coordination and measuring work.

[0009] The documents AT 403601 B, US 5516069 A, US 3713259 A, US 2004163334 Al, US 2005056760 Al, US 2570282 A, FR 2872190 Al, and JP 2015137452 A all depict support feet, typically for bracing a floor against a base plate. The height of the support feet is adjustable by screwing a threaded rod protruding upwards from a nut-shaped section. The nut-shaped section is attached to another part, which is fixed to the base plate either by separate screws or by a very high weight. These designs are unsuitable for leveling precast walls or columns on a solid load-bearing element because they force an excessively large minimum distance between the precast walls and the solid load-bearing element.

[0010] German patents DE 2757574 Al and DE 29723645 Ul, published in 1979 and 1999 respectively, describe leveling devices for aligning the upper surface of a flat, horizontal layer of concrete or screed. A leveling device comprises a threaded nut, which is rigidly inserted into a bore in the solid substrate with its vertical thread axis, and a threaded stud which is screwed to the threaded nut, projects upwards from it, and is equipped with a widened end face. The leveling devices are intended to be encased in concrete or screed. The uppermost surface of a leveling device serves as a support for a horizontally aligned screed, which is used to level the surface of the concrete or screed layer to ensure it is flat and at the intended height. It can also be used as a support for heavier objects such as...These leveling devices have not been considered for prefabricated walls or columns to date. SE.

[0011] Starting from this state of the art, the inventor set himself the task of designing a support device that interacts with a massive load-bearing part of a building in such a way that more comfortable and less complex work is made possible for positioning a vertical building part, which is a prefabricated wall or a column, while still allowing very small distances between the massive load-bearing part and the vertical building part.

[0012] To solve the problem, it is assumed that the vertical part of the building is supported by a support device which includes a threaded nut and a threaded stud connected to it, with the thread axis being vertically oriented.

[0013] As an improvement according to the invention, it is proposed to transfer the functional principle known for decades from DE 2757574 Al and DE 29723645 Ul for leveling devices with negligible weight loads to the present task as a heavily weight-loaded assembly. Accordingly, a threaded stud is screwed into a threaded nut, which is inserted with a vertical thread axis into a bore in the solid substrate. The stud projects upwards from the threaded nut and is equipped on its upper end face with a widening referred to as a bearing plate. Surprisingly, it is easily possible to design the support device functioning according to this principle to be statically sufficiently load-bearing to reliably withstand the loads from a vertical building component to be supported, which is a prefabricated wall or a column.

[0014] Specifically, it is proposed to temporarily support the vertical part of the building downwards exclusively by a support device, which is designed as a threaded nut and thus a threaded stud and support plate in thread engagement, where the threaded stud protrudes upwards from the threaded nut, and the support plate is connected to the threaded stud at its upper end, and the threaded nut is anchored directly in a bore in the solid load-bearing part of the building, the bore extending downwards into the solid load-bearing part from the top of the solid load-bearing part.

[0015] With this solution, the following advantages are easily achievable:

[0016] - By screwing the threaded stud in or out, the height of the upper surface of the support plate can be conveniently and continuously adjusted. If necessary, a very low height can also be set, as the threaded nut can be positioned so that it does not protrude upwards beyond the solid supporting part, or only very slightly.

[0017] - There is no upward projection of the threaded stud, therefore no drilling is required in the lower surface of the vertical part of the building.

[0018] - The construction is so robust that set levels remain stable even under harsh construction site conditions and regardless of the weight load.

[0019] - The construction method is cost-effective.

[0020] - The construction method requires very little manual skill.

[0021] - The design allows for the adjustment of a height level above the massive load-bearing part in an extremely comfortable and ergonomic way before the vertical building part is attached, using a measuring rod of a leveling system, which is designed at its lower end end by means of an engagement part for rotationally fixed connection to the support plate.

[0022] The invention is illustrated with reference to drawings. Fig. 1 shows a partial sectional view with a section plane parallel to the thread axis of a part of an exemplary assembly according to the invention.

[0023] Fig. 2 shows, in the same view as Fig. 1, a support part from the assembly of Fig. 1 including a measuring rod for a leveling system.

[0024] The part of an assembly according to the invention shown in Fig. 1 comprises a vertical building section 1, a solid load-bearing section 2, and a support device 3 anchored to the latter. (If the vertical building section 1 is a prefabricated wall, at least two support devices 3 are used, each of which is anchored in the solid load-bearing section 2 as shown and helps to support the vertical building section 1. If the vertical building section 1 is a column, generally one support device 3 is sufficient.)

[0025] The massive load-bearing part 2 is typically made of concrete. For fastening the support device 3, it is provided with a bore 4, which is drilled vertically downwards from its upper surface. The support device 3 consists of a threaded nut 5, a threaded stud 6 engaged with the nut, and a support plate 7, which forms the uppermost part of the support device 3 and is connected to the threaded stud 6 at its upper end. Ideally, the upper surface of the support plate 7 is horizontally oriented. A engagement geometry for a screwdriver tool can be formed on the upper surface of the support plate 7 or, if applicable, on the upper end face of the threaded stud 6 accessible through a bore in the support plate 7.

[0026] The support plate 7 can be rigidly connected to the threaded stud 6, for example by welding. The threaded nut 5 projects into the bore 4 and is anchored therein, typically by an interference fit between a portion of its outer surface and the surface of the bore 4. Preferably, but not necessarily, the threaded nut 5 has an annular widening 8, the lower surface of which rests on the upper surface of the solid supporting part 2 from above, thus positively supporting the threaded nut 5 against downward movement (alone or additionally).

[0027] The threaded pin 6 is screwed into the threaded nut 5. The bore 4 is dimensioned to a sufficient depth so that the threaded pin 6 can be screwed into the threaded nut 5 to such an extent that the support plate 7 can come to rest against the threaded nut from above.

[0028] The outer diameter of the portion of the threaded nut 5 to be driven into the bore 4 can be slightly larger than the diameter of the bore 4 as long as the threaded nut is not yet driven in. For example, the outer diameter of the threaded nut 5 can be 12.5 mm, while the diameter of the bore 4 in the solid supporting part 2 is 12 mm before the threaded nut 5 is inserted. The threaded nut 5 is then driven into the bore 4 by forceful tapping. The threaded nut 5 and the solid supporting part 2 then bear against each other in an interference fit and are therefore held immovably by friction. The outer surface of the portion of the threaded nut 5 to be inserted into the bore 4 can also have ribs or projections, etc., which improve the frictional engagement in the bore 4.

[0029] The dimensioning of the support structure 3 to withstand the load expected from the vertical building section 1 is within the scope of standard practice for structural engineers, and therefore does not require further discussion here. SE

[0030] As with the construction methods discussed as state of the art, it is also advisable, before positioning the prefabricated partition wall 1 on the solid load-bearing part 2, between those support structures 3 which are to support the vertical building part 1 at least initially, to apply a slurry mortar to the solid load-bearing part 2, which is pressed by the vertical building part 1 into a band with a horizontal surface on top, and then hardens, so that the layer thus formed can bear the weight of the vertical building part 1 in the future, and fills any gap that would otherwise exist between the solid load-bearing part 2 and the vertical building part 1.

[0031] Without claiming to be exhaustive, some possible variations of the depicted construction method for massive load-bearing parts with support devices, which also lie within the scope of the invention, are briefly mentioned below:

[0032] The outer surface of the threaded nut can be equipped with a bolt thread that can be screwed into the bore in the solid load-bearing part. The upper surface of the threaded nut can also be provided with a grip geometry for a screwdriver tool.

[0033] The downward support of the threaded nut can also be achieved by having the - longer - threaded nut rest against the bottom of bore 3 in the solid supporting part.

[0034] The support plate can also be mounted so that it can rotate around the axis of the threaded stud. Accordingly, the upper end face of the threaded stud can be freely accessible and provided with a gripping geometry for a screwdriver tool – for example, a recess for a Torx or Phillips screwdriver. Alternatively, the cylindrical surface of the threaded stud in the longitudinal area adjoining the support plate at the bottom can also be provided with a gripping geometry for a screwdriver tool.

[0035] The support plate can be provided with screw through holes or with upward-projecting extensions in order to form a rotationally fixed connection with the parts that are intended to rest against the support plate from above.

[0036] According to an advantageous optional further development of the invention, the support device 3 has a screw locking element 9. The screw locking element 9 is a metal plate whose thickness is at most equal to the pitch of the thread of the threaded stud 6, and which is perforated by a bore through which the threaded stud 6 passes, wherein the thread of the threaded stud 6 is in thread engagement with the cylindrical surface of the bore in the metal plate, and wherein the metal plate extends radially further away from the thread axis than the support plate 7.

[0037] The locking element 9 allows the screw movement of the threaded stud 6 relative to the threaded nut 5 to be selectively blocked by rotating the locking element 9 downwards around the threaded axis of the threaded stud 6 until it rests firmly against the top of the threaded nut 5 or against the top of the solid supporting part 2, thus acting like a lock nut. Compared to a conventional lock nut, the locking element 9 is advantageous because it requires less height and can be operated without tools.

[0038] Fig. 2 illustrates, using an example, how the height of the support plate 7 can be adjusted on the support structure 3 even in the absence of a vertical building element, using a measuring rod 10 of a leveling system. In this exemplary case, the support plate 7 is rotationally fixed to the threaded stud 6, and its base is, for example, square. The measuring rod 10 is provided at its lower end with an engagement element 11, which can be rotationally fixed to the support plate 7. In the illustrated example, the engagement element 11 has four downward-projecting extensions, located radially from the axis of the measuring rod 10 by half the side length of the aforementioned square, so that they can collectively encompass the support plate 7 and are then rotationally fixed to the support plate 7 with respect to the axis of the measuring rod 10, which is coaxial with the axis of the threaded stud 6.To adjust the height of the support device 3, the measuring rod 10 with the engagement part 11 only needs to be brought into engagement with the support plate 7, and then rotated about its axis. As is known from measuring rods for leveling devices, the measuring rod 10 can be provided with a length scale, which typically interacts with a laser level that illuminates a horizontal plane in space.

Claims

Patent claims 1. Assembly comprising a support device (3) for a vertical building part (1), which is a prefabricated wall or a column, and a solid load-bearing part (2), wherein the support device (3) is designed to support the vertical building part (1) above the solid load-bearing part (1) at a defined height, wherein the support device (3) comprises a threaded nut (5) and a threaded stud (6) engaged therein, characterized in that the vertical building part (1) rests from above on a support plate (7) belonging to the support device (3), which is arranged at and connected to the upper end of the threaded stud (6), wherein the threaded stud (6) projects upwards from the threaded nut (5), and wherein the threaded nut (6) is anchored directly in a bore (4) which extends downwards from the top of the solid load-bearing part (2) into it.

2. Assembly according to claim 1, characterized in that the threaded nut (5) bears against the outer surface of the bore (4) with a part of its outer surface.

3. Assembly according to claim 2, characterized in that the threaded nut (5) and the cylindrical surface of the bore (4) are in a press fit against each other.

4. Assembly according to claim 2, characterized in that the outer surface of the threaded nut (5) has an external thread which engages with a part of the surface of the bore (4).

5. Assembly according to one of claims 1 to 4, characterized in that the threaded nut (5) has an annular widening (8) whose lower surface rests on the upper surface of the solid supporting part (2) from above.

6. Assembly according to one of claims 1 to 5, characterized in that it comprises a screw locking element (9) which is a metal plate whose thickness is at most equal to the pitch of the thread of the threaded stud (6) , and which is perforated by a bore through which the threaded stud (6) passes, wherein the thread of the threaded stud (6) is in thread engagement with the cylindrical surface of the bore in the metal plate, and wherein the metal plate extends radially further away from the thread axis than the support plate (7) .

7. Assembly according to one of claims 1 to 6, characterized in that the threaded pin (6) and / or the support plate (7) rigidly connected to the threaded pin (6) has an engagement geometry for a screwdriver tool for rotation about the axis of the threaded pin (6).

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