WO2023070138A1

WO2023070138A1 - Connecting element

Info

Publication number: WO2023070138A1
Application number: PCT/AT2022/060368
Authority: WO
Inventors: Anton KRALER; Andreas POMAROLI; Philipp ZINGERLE; Bernhard Maurer; Christian STÖFFLER; Martin LENGAUER-STOCKNER
Original assignee: Universität Innsbruck; Holzbau Lengauer-Stockner Gmbh; Fs1 Fiedler Stöffler Ziviltechniker Gmbh
Priority date: 2021-10-25
Filing date: 2022-10-24
Publication date: 2023-05-04
Also published as: AT525590A1; CA3234234A1

Abstract

The invention relates to a connecting element (1), comprising a front retaining section (2) with a first thickness (d2), a rear retaining section (3) with a second thickness (d3), wherein the front retaining section (2) has an even front boundary surface (4), wherein the rear retaining section (3) has an even rear boundary surface (5), wherein the front boundary surface (4) and the rear boundary surface (5) are arranged substantially parallel, wherein the front boundary surface (4) has an edge with a U-shape, polygon shape or V-shape, wherein the rear boundary surface (5) has an edge with a U-shape, polygon shape or V-shape, wherein the U-shape, polygon shape or V-shape of the edge of the front boundary surface (4) and the U-shape, polygon shape or V-shape of the edge of the rear boundary surface (5) are rotated relative to one another by an angle (a) of 90° to 180°, wherein the width (b2) of the front retaining section (2) reduces from the region of the edge with the U-shape, polygon shape or V-shape, along the first thickness (d2), to the rear retaining section (3), wherein the width (b3) of the rear retaining section (3) reduces from the region of the edge with the U-shape, polygon shape or V-shape, along the second thickness (d3), to the front retaining section (2).

Description

CONNECTING ELEMENT

The present invention relates to a connecting element for connecting wooden components.

BACKGROUND OF THE INVENTION

In timber construction, various wooden components have to be connected using fasteners, with great demands being placed on the fasteners. The lanyards have to absorb heavy loads and they should be easy to use on construction sites. In many cases, metallic fasteners that meet these requirements are used. In addition to simple screw connections, more complex metal fasteners are also used.

For example, EP 1 239 092 A1 discloses a metallic, multi-part connecting element for connecting two beams with two connecting flanges, which are each screwed to the beam to be connected. A connecting flange has a slot-shaped recess into which an adapted projection of the other connecting flange is inserted.

However, there is an increasing desire in timber construction for metal-free fasteners or fasteners made of wood. In the past, these were replaced by metallic fasteners due to increasing demands on the load-bearing capacity and changed cost structures. In order for wooden fasteners to be able to compete with metal ones in terms of load-bearing capacity and cost-effectiveness, more complex wood materials and production methods are required, which are available today.

EP 3 359 754 B1 describes connecting elements in order to connect two components to one another along surfaces facing one another. In this case, two components with a recess are connected to one another by a connecting element. This is designed as a kind of double dovetail (also known as a Hoffmann dovetail), with the two dovetails being arranged in such a way that the narrow end of one dovetail is connected to the narrow end of the other dovetail and the wide ends of the dovetail are spaced apart. The corresponding recesses in the components are positively connected to form a dovetail, with the recesses being narrower in the region of their opening at the edge of the component and wider in the interior of the component. Such connecting elements are well suited for connecting two components to one another at the ends. DE 10 2011 008 752 A1 describes a type of dovetail connection for connecting two beam-shaped wooden components. The dovetail connection consists of a pin provided on the first component with lateral outer surfaces converging in a wedge shape in the insertion direction and a groove provided on the second component, which contains inner side surfaces corresponding to the outer surfaces of the pin.

For the connection of wall elements with ceiling elements made of wood, it is also already known from the prior art to mill a recess in the wall element and a projection in the ceiling element in order to produce a form-fitting connection. In this case, however, the introduction of the projections, in particular if a plurality of projections have to be introduced into a ceiling element, is associated with a high loss of material and time.

BRIEF DESCRIPTION OF THE INVENTION

The object of the present invention is therefore to provide a connecting element which enables the connection of a ceiling element made of wood to a wall element made of wood without using a great deal of material and enabling very high stability in the longitudinal and transverse directions.

This task is solved comprehensively by the connecting element

• a front support section with a first thickness,

• a rear holding section with a second thickness, the front holding section having a flat front boundary surface, the rear holding section having a flat rear boundary surface, the front boundary surface and the rear boundary surface being arranged essentially parallel, the front boundary surface having an edge with U-shape, polygonal shape or V-shape, the rear boundary surface having a U-shape, polygonal shape or V-shape edge, the U-shape, polygonal shape or V-shape of the edge of the front boundary surface to the U-shape, Polygon shape or V-shape of the edge of the rear boundary surface are rotated at an angle of 90° to 180° to each other, the width of the front holding section from the area of the edge with U-shape, polygon shape or V-shape along the first thickness to the rear holding section the width of the rear retaining portion decreases from the region of the U-shape, polygonal shape or V-shape edge along the second thickness toward the front retaining portion. With such a connecting element, structural elements made of wood, which have form-fitting recesses for the holding sections, can not only be easily connected; the connection is also very stable and also very tight due to the form fit. The connecting element forms a coupling element that is independent of the structural elements, which can be optimized separately and sunk into the structural element, such as ceiling or wall elements, without overhanging dimensions. The loss of material for the production of a peg or projection in the component is eliminated. Likewise, the plate elements on both sides remain unaffected by the connecting element, except for the accurately fitting recess of the respective pivot hole, without requiring excessively large recesses for assembly purposes, etc. The alignment of the panels is not exceeded on both sides of the connection by the system connection, so that this system is also very well suited for multi-storey walls with subsequently suspended ceilings.

The holding sections of the connecting element can be connected to one another seamlessly and with a force fit and thus be independent of the panel elements to be connected. These are simply sunk into precisely fitting mortises arranged on both sides of the panel elements without changing the outer panel dimensions such as alignment. Thus, the holding sections do not have to be screwed onto the plate elements. Therefore, the connection system does not require any metal tools such as screws or bolts.

It is preferably provided that both the front boundary surface has an edge with a U shape or V shape and that the rear boundary surface has an edge with a U shape or V shape. In both cases, the U-shape is particularly preferred.

In a preferred embodiment variant, the connecting element is designed in one piece. It can be made, for example, by milling.

An alternative embodiment provides that the front holding section is connected to the rear holding section via pin-shaped connecting means.

However, both design variants result equally in an independent, multidimensionally statically effective coupling element that can be optimized independently of the plate elements.

Particularly preferably, the connecting element is made of wood; if necessary, binders or adhesives are also provided in order to connect the wooden elements of the holding sections. The connecting element can have at least one holding section made of laminated veneer lumber. Therefore, binders are also provided for this reason. Preferably, the main grain direction of the laminated veneer lumber is parallel to the longitudinal axis of the U-shape, polygon shape or V-shape. However, there is no gluing or assembly on the panel elements, the connecting means is completely independent of the panel elements and can therefore also be optimized or conditioned.

In one embodiment variant it is provided that the U-shape, polygonal shape or V-shape of the edge of the front boundary surface is rotated by approximately 180° relative to the U-shape, polygonal shape or V-shape of the edge of the rear boundary surface. This makes it particularly easy to install ceiling elements and wall elements that are aligned at 90° to one another in the longitudinal plane. Other angles allow, for example, wall and ceiling elements to be installed at an angle (e.g. at an obtuse angle). With all angles, the connecting element and the two plate elements with milled, precisely fitting peg holes do not oversize the alignments, so that the connecting element is also very well suited for retrofitted renovations or extensions for renovations.

Preferably, the width of the front holding portion linearly decreases from the region of the U-shape, polygonal shape or V-shape edge along the first thickness to the rear holding portion. Therefore, the outer contour along the thickness of the front holding portion is also U-shaped, polygonal or V-shaped, but the size of the U-shape, polygonal shape or V-shape decreases.

Also preferably, the width of the rear holding portion linearly decreases from the region of the U-shape, polygonal shape or V-shape edge along the second thickness toward the rear holding portion. Therefore, the outer contour along the thickness of the rear holding portion is also U-shaped, polygonal or V-shaped, but the U-shape, polygonal or V-shape decreases in size.

The width of the front holding section preferably decreases from the area of the edge with a U shape, polygon shape or V shape along the first thickness to the rear holding section up to a parting plane between the front holding section and the rear holding section. Furthermore, it can be provided that the width of the rear holding section decreases from the region of the edge with a U shape, polygon shape or V shape along the second thickness to the parting plane. Both holding sections remain seamlessly and non-positively connected to one another.

Besides linearly decreasing the width of the front support portion from the region of the U-shape, polygonal shape or V-shape edge, the width may gradually decrease along the first thickness to the rear support portion. This also applies analogously to the rear holding section, so that the width of the rear holding section is gradual from the area of the edge with a U shape, polygon shape or V shape along the second thickness to the front holding section can decrease. Such steps can increase the stability of the connection. Gradually decreasing width means that the width of the respective holding section initially decreases linearly in some areas from the U-shaped, polygonal or V-shaped edge along the respective thickness to the other holding section, with a step then being provided in which the width towards the other holding section increases abruptly and forms a new edge with a U-shape, polygonal shape or V-shape, the width linearly decreasing again from the new edge along the respective thickness to the other holding section.

A sealing element can be applied along the first thickness and/or along the second thickness for acoustic decoupling and an airtight connection of the connected components.

The sealing element can be a soundproofing element, an airtight element, a fire protection sealing element or a combination thereof.

The invention also relates to a set comprising

• a connecting element of the aforementioned type

• a first component with a recess which is formed in a form-fitting manner with respect to the front holding section and

• a second component with a recess which is formed in a form-fitting manner with respect to the rear holding section.

A sealing element can be inserted along a component for acoustic decoupling and an airtight connection of the connected components. In this case, the sealing element is folded into the component. This sealing element can also be placed in the recess on the back of a holding section.

If sealing elements are present, both retaining sections can also be installed at an angle, relative to the axes of the components to be connected.

DETAILED DESCRIPTION OF THE INVENTION

Further advantages and details of the invention are explained with reference to the figures and the following description of the figures.

It shows:

Fig. La to Id show a first embodiment of a connecting element according to the invention in oblique view (Fig. La), front view (Fig. 1b), side view (Fig. 1c) and rear view (Fig. Id). Fig. 2a to 2d show a second embodiment of a connecting element according to the invention in oblique view (Fig. 2a), front view (Fig. 2b), side view (Fig. 2c) and rear view (Fig. 2d).

Fig. 3a to 3d show the embodiment variant of the connecting element of Fig. La to Id with a sealing element.

4a to 4d show a third embodiment variant of a connecting element according to the invention in oblique view (Fig. 4a), front view (Fig. 4b), side view (Fig. 4c) and rear view (Fig. 4d).

5a to 5d shows the connecting element according to FIG.

6a to 6d shows the connecting element according to FIGS ) or oblique view in two views (Fig. 6c and Fig. 6d).

In the figures and descriptions of figures, the same components are used with the same reference numbers, so that in the description of the individual embodiment variants, in the event of overlaps, all the components already described are not explained again.

Fig. La to Id show a connecting element 1 according to the invention. The connecting element 1 comprises a front holding section 2 with a first thickness d2 and a rear holding section 3 with a second thickness d3. The two holding elements 2, 3 engage in complementary recesses on the components (see FIG. 5). The front holding section 2 has a flat front boundary surface 4 towards the front of the connecting element 1 . The front boundary surface 4 is designed in such a way that the edge shows a U-shape. The rear holding section 3 has a flat rear boundary surface 5, the rear boundary surface 5 also having a U-shaped edge. Front boundary surface 4 and rear boundary surface 5 are arranged parallel to one another. In addition, the respective "U" of the U-shape of the edge of the front boundary surface 4 is rotated relative to the U-shape of the edge of the rear boundary surface 5 by an angle of a 180°.

It can be clearly seen that the width b2 of the front holding section 2 extends from the area of the U-shaped edge along the first thickness d2 towards the rear holding section 3 decreases. Analogously, the width b3 of the rear holding section 3 decreases from the area of the U-shaped edge along the second thickness d3 in the direction towards the front holding section 2 .

In the embodiment of FIGS. The connecting element 1 consists accordingly only of wood and binder, the binder being necessary to build up the laminated veneer lumber.

Both holding sections 2, 3 consequently consist of laminated veneer lumber, the main grain direction of the laminated veneer lumber being parallel to the longitudinal axis of the U-shape.

As can be seen from the images in FIGS. Also, the width b3 of the rear holding portion 3 linearly decreases from the area of the U-shaped edge along the second thickness d3 toward the front holding portion 2 . Specifically, the width b3 of the rear holding section 3 decreases from the region of the U-shaped edge along the second thickness d3 to the parting plane E. In addition, the width b2 of the front holding section 2 decreases from the region of the U-shaped edge along the first thickness d2 to the rear holding section 3 up to a parting plane E between the front holding section 2 and the rear holding section 3 . (For reasons of clarity, the parting plane E is only shown in FIG. 2a, which otherwise also shows a connecting element 1 analogous to FIG. 1a to 1d.)

In contrast to the exemplary embodiment in FIGS. 1 a to 1 d , the connecting element in FIGS . In the exemplary embodiment shown, eight connecting means 9 are shown, which are arranged approximately in a circle on the respective holding section 2, 3 in order to optimize the load distribution. The holding sections 2, 3 have bores into which the connecting means 9 are inserted. The connecting means 9 can be force-fitted into the bores and/or glued into the bores.

Otherwise, the exemplary embodiments of FIGS. 1a to 1d and 2a to 2d are analogous.

The exemplary embodiment in FIGS. 3a to 3d corresponds to the exemplary embodiment in FIGS. 1a to 1d, a sealing element 11 being applied along a thickness d3. In this case, the sealing element 11 is a combination of soundproofing element, airtightness element and fire protection sealing element. In the embodiment of Figs. 4a to 4d a modification of the embodiment of Figs. La to Id is shown. In this case, it is provided that the width b3 of the rear holding section 3 decreases in stages from the U-shaped edge along the second thickness d3 to the front holding section 2 in some areas. This means that the width b3 of the rear holding section 3 decreases in regions from the U-shaped edge along the second thickness d3 to the front holding section 2, then increases again at a stage and finally decreases again.

5a to 5d shows a connecting element 1 as described in FIGS. 1a to 1d, as well as a first component 31 in the form of a wall element and a second component 32 in the form of a ceiling element. The first component 31 has a recess which is formed in a form-fitting manner with respect to the front holding section 2 . The second component 32 has a recess which is formed in a form-fitting manner with respect to the rear holding section 3 . When assembled, the component can thus connect a wall element to a ceiling element. The shape of the connecting element 1, the recesses in the components and the form-fitting connection enable an ideal transmission of force from the ceiling element 32 to the wall element 31. The pressures (Poecke and Pwand) acting on the connecting element 1 are shown in FIG. 5a. 5c and 5d show views with several connecting elements in order to connect a ceiling element 32 to a wall element 31. FIG.

6a to 6d shows a connecting element 1 as described in FIGS. 1a to 1d, as well as a first component 31 in the form of a wall element and a second component 32 in the form of a ceiling element. The first component 31 has an oversized recess—shown obliquely here—for receiving a sealing element 11 inserted at the rear, which is designed in a form-fitting manner with respect to the front holding section 2 together with the sealing element 11 . The second component 32 has a recess--shown obliquely here--which is formed in a form-fitting manner with respect to the rear holding section 3. A fold with a built-in sealing element 11 is also shown along the wall element. 6a and 6b show the complete system, consisting of a sealing element 11 inserted between the first component 31 and the front holding section 2, as well as front and rear holding sections 2, 3, which are positioned at an angle relative to the axes of the components to be connected, both in the assembled state ( Fig. 6a) and in an exploded view (Fig. 6b).

The sealing element 11 can be inserted into a fold 12 along the first component 31 . 6c and 6d show a first and a second component 31, 32, which are connected to one another using a plurality of connecting elements 1 and, in addition, between the first component 31 and the front holding sections 2 of the connecting elements 1 Gasket 11 have. The seal 11 can also be arranged in each case between the second component 32 and the rear holding section 3 in the embodiment variants in FIGS. 6a to 6d.

The shape of the connecting element 1, the recesses in the components and the form-fitting connection enables an ideal transmission of force from the second component 32, the ceiling element, to the first component 31, the wall element. The pressures (Poecke and Pwand) acting on the connecting element 1 are shown in FIG. 6a.

Claims

EXPECTATIONS

1. Connecting element (1), comprising

• a front holding section (2) with a first thickness (d2),

• a rear holding section (3) with a second thickness (d3), the front holding section (2) having a flat front boundary surface (4), the rear holding section (3) having a flat rear boundary surface (5), the front Boundary surface (4) and the rear boundary surface (5) are arranged essentially parallel, with the front boundary surface (4) having an edge with a U-shape, polygonal shape or V-shape, with the rear boundary surface (5) having an edge with a U- shape, polygonal shape or V-shape, the U-shape, polygonal shape or V-shape of the edge of the front boundary surface (4) being at an angle ( a) are rotated from 90° to 180° to each other, the width (b2) of the front holding section (2) from the area of the edge having a U-shape, polygonal shape or V-shape along the first thickness (d2), to the rear holding section ( 3) decreasing, the width (b3) of the rear holding section (3) decreasing from the area of the U-shaped, polygonal-shaped or V-shaped edge along the second thickness (d3) towards the front holding section (2).

2. Connecting element according to claim 1, characterized in that it is designed in one piece.

3. Connecting element according to claim 1, characterized in that the front holding section (2) is connected to the rear holding section (3) via pin-shaped connecting means (9).

4. Connecting element according to claims 1 to 3, characterized in that it consists of wood and optionally binder.

5. Connecting element according to one of Claims 1 to 4, characterized in that the U-shape, polygonal shape or V-shape of the edge of the front boundary surface is at an angle (a ) are rotated from 90 to 180° to each other.

6. Connecting element according to one of claims 1 to 5, characterized in that the width (b2) of the front holding section (2) from the area of the edge with a U-shape, polygonal shape or V-shape along the first thickness (d2) to the rear holding section (3) linearly decreases, wherein the width (b3) of the rear holding portion (3) linearly decreases from the region of the U-shape, polygonal shape or V-shape edge along the second thickness (d3) toward the front holding portion (2).

7. Connecting element according to one of claims 1 to 6, characterized in that the width (b2) of the front holding section (2) from the area of the edge with a U-shape, polygonal shape or V-shape along the first thickness (d2) to the rear holding section (3) decreases towards a parting plane (E) between the front holding section (2) and the rear holding section (3).

8. Connecting element according to claim 7, characterized in that the width (b3) of the rear holding section (3) from the area of the edge with a U-shape, polygonal shape or V-shape along the second thickness (d3) to the parting plane (E). decreases.

9. Connecting element according to one of Claims 1 to 8, characterized in that at least one holding section (2, 3) consists of laminated veneer lumber, the main fiber direction (if one or more fiber directions are present) of the laminated veneer lumber being parallel to the longitudinal axis of the U-shape, polygon shape or V shape is.

10. Connecting element according to one of claims 1 to 9, characterized in that the width (b2) of the front holding section (2) in areas from the edge with a U-shape, polygonal shape or V-shape along the first thickness (d2) to the rear holding section (3) gradually decreases.

11. Connecting element according to one of claims 1 to 10, characterized in that the width (b3) of the rear holding section (3) in areas from the edge with a U shape, polygonal shape or V shape along the second thickness (d3) to the front holding section (2) gradually decreases.

12. Connecting element according to one of claims 1 to 11, characterized in that a sealing element (11) is applied along the first thickness (d2) and/or along the second thickness (d3).

13. Connecting element according to claim 12, characterized in that the sealing element (11) is a soundproofing element, an airtight element, a fire protection sealing element or a combination thereof.

14th set, comprehensive

• a connecting element according to any one of claims 1 to 13,

• a first component (31) with a recess which is formed in a form-fitting manner with respect to the front holding section (2) and

• a second component (32) with a recess which is formed in a form-fitting manner with respect to the rear holding section (3).

15. Set according to claim 14, characterized in that the first component (31) is a wall element and the second component (32) is a ceiling element.

16. Set according to claim 14, characterized in that the first component (31) is a wall element and the second component (32) is a wall element.

17. Set according to claim 14, characterized in that the first component (31) is a ceiling element and the second component (32) is a ceiling element.

18. Set according to one of claims 14 to 17, wherein a sealing element (11) is arranged between the first component (31) and the front holding section (2).