Dowels for fastening to load-bearing structures made of aerated concrete and load-bearing structures with cavities

Abstract

The invention relates to a dowel for fastening various parts to a supporting structure made of aerated concrete or a supporting structure with a cavity. The dowel consists of the dowel 1 with the webs 6.1, which are deformed by the clamping element 2 into wings 6, which then form an abutment for absorbing tensile forces. The dowel can hold fastening elements 9 directly or via screws 12.

Description

[0001] The present invention relates to a dowel having the features of the preamble according to claim 1.

[0002] Dowels have long been used in large quantities to fasten a wide variety of parts.

[0003] A myriad of geometric designs and almost every type of material are used.

[0004] A particular challenge is the fastening to aerated concrete and to fixings with cavities.

[0005] Due to the pores present in aerated concrete, its strength is very low. The concrete yields very easily under compressive stress.

[0006] The low compressive strength in aerated concrete prevents the use of dowels whose seating is created by expansion and / or friction.

[0007] Most commercially available dowels for aerated concrete have the disadvantage of being cumbersome to handle and / or only allowing one type of fastening.

[0008] The object of the invention is to create a dowel that allows for easy installation and cost-effective manufacturing. Furthermore, it should provide at least two types of fastening for fixtures.

[0009] The new dowel is designed to be suitable for fastening various parts to aerated concrete and to supporting structures with cavities.

[0010] The cavities in load-bearing structures with cavities do not provide lateral support for anchors placed within the cavity. Anchors that rely on lateral pressure and / or friction for support cannot be used in these situations.

[0011] The problem, according to

[0009] , is solved with a dowel for fastening to a support structure having the features of claim 1.

[0012] An exemplary embodiment is described in more detail below with reference to the drawings.

[0013] They show: Figure 1: A section of a dowel 1 according to the invention, shown in its relaxed state, with a clamping tool 4 inserted. Also shown is section AB of the dowel according to the invention, revealing the windows 5 in the upper part of the dowel. The webs 6.1 are formed by the windows. Figure 2: A dowel 1 according to the invention in section and in a tensioned state, wherein the webs 6.1 formed by the windows 5 are compressed and bent outwards, forming the wings 6. Also shown is a top view of the dowel according to the invention with the outwards bent wings 6. Figure 3: a dowel 1 according to the invention inserted into aerated concrete 7, holding a plate 9 to be fastened. Figure 4: a dowel 1 according to the invention is inserted into a supporting structure with a cavity 10 and holds a plate 9 to be fastened.

[0014] Figure 1 shows the dowel 1 according to the invention with the clamping element 2 and a clamping tool 4. The dowel 1 consists of a hollow body which is partially provided with a (selectable) number of windows 5, thereby creating webs 6.1 which, in the clamped state, become projecting wings 6 (Figure 2 / 6).

[0015] The clamping element 2 is a round body with a threaded bore 3 and a shoulder at its upper end that rests on the dowel 1. The clamping tool 4 is inserted into the thread 3, also via a thread. The clamping tool 4 rests against the lower end of the dowel.

[0016] The clamping tool 4 can be screwed into the thread 3 of the clamping element 2 using a hand drill. This exerts pressure on the webs 6.1 on the windows 5 of the dowel 1. The webs are pushed outwards as wings (Fig. 2 / 6) and thus form a support in the aerated concrete.

[0017] The setting tool can be removed by turning the hand drill counterclockwise.

[0018] Figure 2 shows a dowel according to the invention, in the tensioned state, with the webs 6 spread out to form wings.

[0019] Figure 3 shows a dowel 1 according to the invention inserted into a fastening structure made of aerated concrete 7 and holding a fastening element 9. By setting the dowel 1 and pushing out the wings 6, a cavity 8 is created in the yielding aerated concrete 7. This allows the wings 6 to rest on the aerated concrete and provide a counter-bearing for the load generated by the fastening element 9.

[0020] Figure 4 shows a dowel 1 according to the invention, inserted into a fastening structure 10 with cavity 11, a fastening part 9 and a fastening screw 12.

[0021] Since the cavity 11 offers no lateral fastening options for a dowel, the dowel according to the invention can also be used here. The wings 6 again rest on the cavity as abutments. An additional fastening option, a fastening screw 12, is shown here. The fastening screw 12 can optionally also be used to tighten the dowel 1.

Claims

[1] Anchor for fastening to aerated concrete or a fastening structure with a cavity. characterized by , that the dowel consists of a hollow body 1 with windows 5, to which a clamping element 2 with thread 3 belongs, which is inserted into the hollow body 1. [2] Dowel according to claim 1 characterized by , that a tension is exerted on the clamping element 2 by a clamping tool 4 or a screw 12, by which the webs 6.1 are pushed outwards and form the wings 6, the wings 6 forming a support for absorbing tensile forces. [3] Dowel according to any of the preceding claims characterized by , that a fastening part 9 is held directly by the dowel 1 (Figure 3], by a screw 12 (Figure 4) or by means of a stud screw (not shown). [4] Dowel according to any of the preceding claims characterized by that all parts can be made from different materials.

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