AT527292A4 - Fitting for connecting a wooden component with another part - Google Patents

Abstract

The invention relates to a fitting for connecting a wooden component (1) to another part, wherein the fitting has a first assembly which, when the fitting is mounted, is directly rigidly attached to the wooden component (1), and a second assembly which is directly rigidly attached to the other part, and a third assembly which connects the first and second assemblies, wherein the first assembly has a first insert part (3) with an approximately circular-cylindrical outer contour which is inserted into a circular-cylindrical blind hole (5) in the wooden component (1) and anchored there by several wood screws (4) which are aligned at acute angles to one another and to the axis of the first insert part (3). The first insert part (3) and a second insert part (10, 16) of the second assembly each have a recess (6), and a clamping jaw (11) projects into both recesses (6) and is pressed against an undercut wall area (7) there.

Description

Description

The invention relates to a fitting for connecting a

wooden component with another part.

In a typical and advantageous application, the fitting is used to connect the lower front side of a prefabricated wooden wall of a building with a floor slab

of the building.

A prefabricated wooden wall is often attached to a floor surface using so-called fastening brackets. One leg of a fastening bracket is attached to the prefabricated wall and the other leg to the floor slab, and the legs are connected to the prefabricated wall or floor slab using screws. The simple construction has the disadvantages that it cannot be used for visible wall or floor surfaces for optical reasons, and that joint cover strips

or strips are interrupted by the mounting brackets.

DE 2948063 A1 shows a fitting for connecting two furniture panels lying next to each other in the same plane. Each furniture panel has a groove on one end, the longitudinal direction of which extends from one side of the panel to the other and the cross-sectional area of which is a semicircle. A half ring is inserted into each of these grooves and fixed by screws which run radially in a star shape through the half ring into the panel material. When the connection is made, the two half rings are connected by two clamping disks which are arranged coaxially to the half rings, are pulled together by a screw, and the half rings are held between them.

clamp.

EP 2273017 Al and AT 503129 Bl show a connecting fitting for wooden components, which has an insert part with approximately

has a circular cylindrical outer contour and is intended for use in

1

a circular cylindrical blind hole of the same diameter is inserted into a wooden component and anchored there by screws or nails which are aligned in such a way that they run along the surface lines of an imaginary cone which is arranged coaxially with the axis of the insert part and widens into the wooden component to be connected. The insert part is equipped with an axially running nut thread into which a screw engages, which runs through a part to be attached to the wooden component. The connecting fitting can be used to create connections which are visually inconspicuous and very strong against static loads in the normal and transverse direction (shear). The fitting cannot be used to attach a prefabricated wall to a floor slab, as the latter screw is not tightened.

can be.

EP 3111804 Bl and CN 110657143 A show connecting fittings for connecting two furniture panels, with one end face of one furniture panel resting on a main surface of the second furniture panel. According to EP 3111804 Bl, a screw is inserted into a hollow body, which in turn is inserted into a blind hole in one of the furniture panels. The screw can be driven to rotate via a cross hole and a gear so that its thread tip can be screwed into a nut hole in the second furniture panel. The achievable strength is too low for use on prefabricated walls. According to CN 110657143 A, a hook-like extension is screwed to the base of a recess on one furniture panel using a single screw, and another hook-like extension is screwed to the surface on the second furniture panel using a single screw. To connect the furniture panels together, the two hook-like extensions are hooked together, which requires a precisely defined sliding relative movement of the

Furniture panels together is required. For use on

2

The achievable strength of prefabricated walls is too low, at least in individual loading directions, and the required

relative motion is too difficult.

The object underlying the invention is to provide a fitting for connecting a wooden component to another part, whereby the fitting should be easy and quick to install, should be at least largely concealed when installed, and should be statically resilient to both normal forces and shear forces to such a high degree that it is well suited for anchoring prefabricated walls

of buildings.

To solve the problem, a construction method is used in which the fitting consists of three components, whereby in the case of use, one component is directly rigidly attached to the wooden component, the second component is directly rigidly attached to the part to be connected to the wooden component, and the third component serves to connect the first two components, and whereby the first component has a first insert part with an approximately circular cylindrical outer contour, which is to be inserted into a circular cylindrical blind hole of the same diameter in the wooden component and anchored there by several screws, which are at acute angles to each other and to the axis of the insert.

part are aligned.

As an improvement according to the invention, it is proposed to form the first insert part of the first assembly and a second insert part of the second assembly each with a recess with an undercut surface, wherein when the connection is made, the opening surfaces of the two recesses face each other, and wherein a clamping jaw - which is part of the third assembly - projects into both recesses and in both recesses against the undercut wall area there

pressed into the depression there.

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The invention is explained on the basis of two schematic diagrams of two advantageous exemplary embodiments of the invention.

illustrated and further explained:

Fig. 1: shows a partial sectional view with a cutting plane parallel to the axis of the insert part, the connection of a wooden component to a concrete body according to the invention. Wood screws are symbolically indicated by dotted lines.

ized.

Fig. 2: Shows in the same way as Fig. 1 the inventive

Connection of two wooden components.

In the example according to Fig. 1, a wooden component 1, which can typically be a prefabricated wall of a building, is connected with its lower front side to a concrete body 2, which is typically

which can be a floor area of a building.

The parts of the assembly directly connected to the wooden component 1 are an insert part 3 and wood screws 4. The insert part 3 has a circular cylindrical outer contour and is inserted into a blind hole 5 in the wooden component 1 up to its base, which leads vertically from the outer surface of the wooden component 1 facing the concrete body 2 into the latter and has a circular cross-section whose outer diameter

substantially identical to that of the insert part 3.

On its front side facing the concrete body 2, the insert part 3 has a recess 6. From the bottom of this recess 6, screw through holes run through the insert part 3 to the base of the blind hole 5. The wood screws 4 run through these screw through holes into the material of the wooden component 1, so that they fix the insert part to the wooden component 1. Typically, the screw through holes and thus also the wood screws 4 run

along the surface of an imaginary straight cone, the coa-

4

xial to the blind hole 5 and whose width is

increases with increasing depth.

The surface of the recess 6 has undercut wall areas 7, which are wall areas where the width of the

depression 6 increases with increasing depth of the depression 6.

Parts of the assembly (more or less) directly connected to the concrete body 2 are a screwing plate 8, a threaded bolt 9 rigidly connected to it, screws (not shown) which run through screw through holes (not shown) in the screwing plate 8 into the concrete body and thus fix the screwing plate to the concrete body 2, as well as a second insert part 10 which has a nut thread with the aid of

which it is screwed onto the threaded bolt 9.

When the connection is established, the threaded bolt 9 is aligned coaxially to the axis of the blind hole 5 on the wooden component 1. The second insert part 10 is inserted into the blind hole 5. Its front face, which is on the inside with respect to the blind hole 5, rests against the front face of the first insert part 3, which is on the outside with respect to the blind hole. Ideally, the second insert part 10 has a circular cross-sectional area lying normal to the axis of its nut hole, the outside diameter of which - as shown - is equal to the

Diameter of the blind hole is 5.

On its front side facing the wooden body 1 and thus the insert part 3, the second insert part 10, like the first insert part 3, has a recess 6, the outer surface of which

has undercut wall areas 7.

The third assembly mentioned above, which serves to connect the first two assemblies, comprises in the example shown two clamping jaws 11 and a locking screw 12

marked screw.

5

Each of the clamping jaws 11 extends into the recesses 6 of both insert parts 3, 10. The clamping jaws 11 each have two surface areas 13, which together can be regarded as flank surfaces of a groove enclosed between them with a depth that narrows towards the bottom of the groove. To fix the connection between the two insert parts 3, 10, one of the surface areas 13 of a clamping jaw 11 rests under pressure on the undercut wall area 7 of the first insert part 3 and the second surface area 13 rests under pressure on the undercut

a wall area 7 of the second insert part 10.

In the exemplary embodiment shown, two clamping jaws 11 are used, which are arranged in a mirror image to each other, with the mirror plane being arranged parallel to the axis of the blind hole 5, and the clamping jaws 11 are held in the clamping position shown and described by the locking screw 12 running normal to the axis of the blind hole through the gap between the two clamping jaws 11 and with its outer surface on both clamping jaws 11 under pressure.

is present.

The locking screw 12 is typically a screw with a self-tapping thread in wood. In order to be able to bring it into the functionally necessary position shown, the wooden component 1 is provided with a hole at the height at which the locking screw 12 is to be attached, before assembly, into which the locking screw 12 is to be screwed to complete the assembly. This hole is normal to the axis of the blind hole 5 and crosses it. Using the example of the connection of a prefabricated wall with a floor slab of a building, after the connection according to the invention has been made, the only thing that is required of the connecting fitting is

only the front face of the head of the locking screw 12 is visible.

Previously not mentioned but now clear advantages of the

inventive design is that the connection is non-destructive

6 7117

can be dismantled freely and that the connection in case of fire is very

lasts a long time because the fittings are well protected.

Instead of a locking screw 12, for example, a slim wedge could be used, which is driven between the two clamping jaws 11. It would also be possible to use a rotary wedge instead of the locking screw 12, i.e. a component whose diameter measured normal to a rotation axis changes with the angular position of the measuring direction in the circumferential direction.

changed.

Fig. 2 shows an example of a fitting according to the invention, where two wooden components 1, 15 are connected to each other. The wooden component 1 can in turn be a wall of a prefabricated building. The wooden component 15 can be a suitable wooden

standing floor or ceiling slab of a prefabricated building.

The first insert part 3 is designed exactly the same as in the example shown in Fig. 1 and is inserted into a blind hole in the first wooden

component 1 assembled.

The second insert part 16 belongs to the assembly directly connected to the second wooden component 15. It is not attached to the second wooden component 15 in a blind hole, but lies directly on its surface facing the first wooden component 1. In the fully assembled state, it is also inserted into the blind hole 5 in the first wooden component 1. At its

ten insert part 1 facing

On its front side facing the first insert part 3, the second insert part 16 also has a recess 6 from the bottom of which screw through-holes run through the insert part 16. The wood screws 4 run through these screw through-holes into the material of the second wooden component 15, so that they fix the second insert part 16 to the

Fix the wooden component 15. Typically, the

7

Screw through holes and thus also the wood screws 4 along the surface of an imaginary straight cone which is aligned coaxially to the blind hole 5 and whose width is

increasing depth into the second wooden component 15.

The connection between the two insert parts 3, 16 is made in the same way as described in Fig. 1, again by means of a locking screw 12, which is inserted into a hole in the first wooden component 1

is to be screwed in.

It should be noted that the intended contact surface between one of the insert parts 3, 16 and one of the clamping jaws 11 can also be made on several partial surfaces, i.e. that an insert part 3, 16 can have several undercut wall areas 7 lying one behind the other in the axial direction, and/or that a clamping jaw 11 can have several surface areas 13 which are located in the same recess 6 of an insert part 3, 16 and lie one behind the other in the axial direction of the respective insert part 3, 16. In cross-sectional view, when the connection is made, this looks similar to the cross-sectional view.

view of a threaded connection.

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Claims (6)

patent claims 1. Fitting for connecting a wooden component (1) to another part, wherein the fitting has a first assembly which, when the fitting is mounted, is directly rigidly attached to the wooden component (1), and a second assembly which is directly rigidly attached to the other part, and a third assembly which connects the first and second assemblies, wherein the first assembly has a first insert part (3) with an approximately circular-cylindrical outer contour which is inserted into a circular-cylindrical blind hole (5) in the wooden component (1) and anchored there by a plurality of wood screws (4) which are at acute angles to one another and to the axis of the first insert part (3) are aligned, characterized in that the first insert part (3) and a second insert part (10, 16) of the second assembly each have a recess (6) whose lateral surface has an undercut wall region (7), wherein the opening surfaces of the two recesses (6) face each other, wherein a clamping jaw (11) projects into both recesses (6) and is clamped in both recesses (6) at the respective undercut there. cut wall area (7). 2. Fitting according to claim 1, characterized in that it has two clamping jaws (11) which are arranged mirror-symmetrically to each other and are separated from each other by a part running between them, against which they rest. are pressed. 3. Fitting according to claim 1 or 2, characterized in that one of the insert parts (3, 16) and one of the clamping jaws 9 (11) abut against one another on several surfaces (7, 13) which are located in the axial direction of the respective insert part (3, 16) each other. 4, fitting according to claim 2 or 3, characterized in that the part running between the clamping jaws (11) is a locking screw (12) which can also be fixed by material of the wood component (1). 5. Fitting according to one of claims 1 to 4, characterized in that the assembly which is directly rigidly attached to the further part has a threaded bolt which projects into the blind hole (5) and onto which the second insert part (10) is screwed on. 6. Fitting according to one of claims 1 to 4, characterized in that the insert part (16) of the assembly which is directly rigidly attached to the further part is attached to the further part by a plurality of wood screws (4), wherein the wood screws (4) are aligned at acute angles to each other and to the axis of the first insert part (3) and are guided through material of the second insert part (16) towards run through. 10