Connection element for a wood-concrete composite

Abstract

A connection element (1) for a wood-concrete composite has a support element (2), which forms a support plane (3), and a screw channel tube (4), a proximal end (5) of which connects to the support element (3) and a distal end (6) of which projects away from said support element. The screw channel tube (4) forms a continuous screw channel (7) leading to the support plane (3). At the distal end (6) of the screw channel tube (4), a releasable stopper (8) is arranged which has a first portion (9), received in the screw channel (7), and a second portion (11). The second portion (11) has an outer diameter (AS2) which is greater than an inner diameter (IRD) of the screw channel tube (4) at the distal end (6).

Description

[0001]CONNECTING ELEMENT FOR A WOOD-CONCRETE COMPOSITE The invention relates to a connecting element for a wood-concrete composite with a support element forming a support plane, as well as a screw channel pipe, which is connected to the support element with a proximal end and projects away from it with a distal end, wherein a continuous screw channel leading to the support plane is formed by the screw channel pipe. The invention further relates to a composite comprising at least one wood component and one concrete component and a method for producing such a composite. Wood-concrete composite structures are used in building construction, but also in bridge construction. In particular, ceilings made of wood-concrete composite represent an efficient and resource-saving alternative to conventional ceiling systems constructed entirely from wood or concrete. Components made of a wood-concrete composite consist of one or more wood components that are connected to a concrete component.With wood-concrete composite ceilings, ceiling beams that are already integrated into a building, for example, are connected to a concrete ceiling supported on top. For this purpose, a sub-formwork made of wooden boards can be placed on the beams and fastened to them with fasteners (e.g. screwed) so that the fasteners (e.g. screws) still protrude slightly upwards from the sub-formwork. Concrete is then poured onto the sub-formwork so that, after the concrete has hardened, the upwardly projecting sections of the fasteners are embedded in the concrete ceiling, creating a strong bond between the wood beams and the concrete ceiling. The disadvantage is that this type of wood-concrete composite ceiling has to be manufactured on site. In many cases, it is advantageous if a concrete ceiling or floor covering is already provided at the factory.A wood-concrete composite floor can be produced, which only needs to be placed on-site on the existing ceiling beams and connected to them. This connection can be made, for example, using mechanical fasteners, such as screws, which are guided through screw channels in the concrete component (the concrete ceiling or the wood-concrete composite floor) and screwed so deeply into the wooden component(s) located below the concrete component (e.g. the wooden beams) that the concrete component is pressed against the wooden component(s) by the screw heads. However, the subsequent design of screw channels in the concrete component (the concrete ceiling or wood-concrete composite floor) is difficult for both types of concrete components. It is known to place connecting elements in the formwork before the concrete of the concrete component has hardened (in the case of a concrete ceiling as a concrete component) orto be mounted on the sub-formwork made of wooden boards, which acts as permanent formwork (as a concrete component in a wood-concrete composite ceiling), which form a screw channel in the hardened concrete. A generic connecting element is known, for example, from EP 2216 455 A2. The disadvantage is that conventional connecting elements usually have a rather complicated structure and are therefore complex and cost-intensive to manufacture. The invention is based on the object of providing a connecting element, a composite, and a method for producing such a composite that avoids the problems mentioned as far as possible. In particular, a connecting element is to be provided with which factory-produced concrete components equipped with screw channels can be produced for installation in a wood-concrete composite in a simple and cost-effective manner.This object is achieved according to the invention with a connecting element having the features of claim 1, a composite having the features of claim 12, and a method having the features of claim 15. Preferred and advantageous embodiments of the invention are the subject of the dependent claims. According to the invention, a detachable stopper is arranged at the distal end of the screw channel pipe, said stopper having a first section received in the screw channel and a second section, wherein the second section has an outer diameter that is larger than an inner diameter of the screw channel pipe at the distal end. The connecting element according to the invention can be inserted into a formwork with the support element or screwed to the sub-formwork of a formwork so that the screw channel pipe protrudes upwards.The formwork (in which reinforcement has also been inserted, in particular) can then be filled with concrete. After the concrete component has hardened, the plug protrudes from the top of the concrete component with its end pointing away from the screw channel pipe or is essentially flush with the top of the concrete component (with, for example, small elastic signal flags indicating the position of the plugs in the event that a thin concrete layer has formed over the plugs). After the plug is removed (pulled out or unscrewed), a concrete channel is formed in the concrete component, running from the distal end of the screw channel pipe to the top of the concrete component. A fastening element, in particular a screw, can be guided through the concrete channel and the screw channel pipe in order to connect, in particular screw, the concrete component to an underlying wooden component.The advantage of this is that the screw channel pipe does not need to be shorter than with conventional connecting elements for a wood-concrete composite, where the screw channel pipes must reach at least to the top of the concrete body with their distal end. Thus, the construction of the connecting element according to the invention is simpler than that of other known connecting elements, which advantageously saves material costs (especially if the plugs are reused). Furthermore, when using the connecting element according to the invention, the head of the fastening element does not protrude beyond the concrete component, but is accommodated in the concrete channel. Since the second section of the plug is at least partially enclosed by the concrete body during construction of the concrete body, a step is formed in the concrete channel that remains in the hardened concrete body of the concrete component after the plug is removed.A fastening element guided through the screw channel can bear against the step in order to press the concrete component against the underlying wooden component. The step forms, in particular, a flat support surface against which the head of the fastening element can bear directly or indirectly. Preferably, a longitudinal axis running through the screw channel tube is orthogonal to the support plane of the step. According to a first embodiment, the second section bears directly against the distal end. In such an embodiment, the head of the fastening element, which is guided through the concrete channel remaining after removal of the stopper and the screw channel, bears (directly or indirectly, e.g., via a washer) from above against the screw channel tube and optionally also against the step formed in the concrete channel of the concrete component in the region of the distal end.According to a particularly preferred further embodiment, however, the first section is spaced from the second section and from the distal end by a connecting section arranged therebetween. In particular, the connecting section directly adjoins the first and second sections. The connecting section has an outer diameter that is smaller than the outer diameter of the second section and larger than the inner diameter of the screw channel pipe at the distal end, substantially over the entire length of the connecting section. Furthermore, the connecting section bears (in particular directly) against the distal end of the screw channel pipe. Due to the connecting section, the step is spaced from the distal end of the screw channel pipe. In such embodiments, the fastening element with its head does not bear directly against the distal end of the connecting element, but only against the concrete body (i.e.at the step in the concrete channel), whereby the contact forces do not act on the connecting element, which may be able to withstand lower loads, but only on the concrete body (in particular, more widely distributed via a washer). In particular, the connecting element according to the invention can be used together with a screw serving as a fastening element. When connecting the concrete component to the wooden component, the screw is guided through the concrete channel and the screw channel and screwed into the wooden component arranged underneath until its screw head rests (in particular via a washer) on the distal end and / or the step formed in the concrete component. The concrete component and the underlying wooden component are thus firmly connected (screwed) to one another. However, the connecting element according to the invention can also be used together with another fastening element, for example a nail.The outer diameter of the connecting section does not have to be constant over its entire length, but can vary. However, the outer diameter can only increase, not decrease, from the first section to the second section. The outer diameter of the second section also does not have to be constant over its entire length (although this is preferred), but can vary. In this case, the outer diameter of the second section only increases away from the connecting section. Even with a conically shaped second section, the outer diameter of the connecting section is considered to be substantially smaller than the outer diameter of the second section over its entire length (since the plug only has the same outer diameter in the negligibly short transition area between the sections). Further sections can also adjoin the second section.In particular, within the scope of the invention, it is provided that the plug of the connecting element is arranged with its first section in the screw channel and rests directly against the distal end with a further section directly adjoining the first section (which, depending on the embodiment, is the second section or the connecting section), whose outer diameter is larger than the outer diameter of the first section. It is particularly preferred within the scope of the invention if the outer diameter of the second section is larger than an outer diameter of the screw channel pipe at the distal end. This ensures (particularly in the case of thin-walled screw channel pipes) that the step formed in the fully cured concrete part provided with the connecting element is sufficiently wide. The outer diameter of the connecting section is (substantially) larger over its entire length than the inner diameter of the screw channel pipe at the distal end.The connecting section thus forms a stop up to which the plug can be inserted into the screw channel pipe. Even a conical connecting section has a larger outer diameter essentially over its entire length, even if the outer diameter directly at the distal end is – within a negligibly small range – the same size as the inner diameter of the screw channel pipe. In particular, the outer diameter of the connecting section can be at least the same size as the outer diameter of the screw channel pipe at the distal end, thus ensuring that the plug is inserted into the screw channel only with the first section, but not with the connecting section due to manufacturing inaccuracies or incorrect assembly. It is preferred if the support element is plate-shaped. Such a support element can be arranged flat and therefore very stably on a substructure (e.g., made of wooden panels).The support element preferably has at least one through-hole radially spaced from the screw channel pipe for the passage of a fixing element, such as a screw or nail, so that the support element can be fixed to the subformwork. Within the scope of the invention, the support element can have connecting means for preferably form-fitting, lateral connection to other support elements. The connecting means can be designed, for example, as in a dovetail joint. This allows several interconnected connecting elements to be positioned particularly precisely in a small area. The plug can be inserted into the screw channel with the first section or screwed into the screw channel pipe. An inserted plug enables simpler construction and can be easily removed from the finished concrete component.A screwed-in plug can be unscrewed from the finished concrete component and will not fall out when the connecting element is not installed. In a further alternative embodiment of the connecting element according to the invention, in which the plug has no connecting section, the plug is screwed into the screw channel pipe only so deeply that the second section is spaced from the distal end. The step remaining in the concrete channel after the plug has been unscrewed from the screw channel and the concrete component is also spaced from the distal end in such an embodiment, so that the head of a fastening element guided through the concrete channel and the screw channel does not rest on the distal end, but only on the concrete component. The plug can be reused after removal (particularly in all described embodiments), especially with new connecting elements.Within the scope of the invention, the screw channel pipe and thus also the screw channel can be aligned essentially perpendicular to the support plane. However, it is also conceivable that the screw channel pipe and thus also the screw channel are aligned obliquely to the support plane and form an acute angle with it. Such an acute angle is less than 90° and preferably greater than 10°, 15°, or even 20°. The acute angle can be, in particular, between 20° and 40°, for example, approximately 30°. With an obliquely running screw channel pipe, the connecting element in the finished wood composite is also aligned obliquely so that it can better withstand shear movements between the concrete component and the underlying wood component. Within the scope of the invention, it is conceivable that the screw channel pipe has a larger inner diameter, and preferably a larger outer diameter, at its proximal end than at its distal end.A mounting magnet, for example, can be inserted into the recess formed in this way. A connecting element equipped with such a magnet adheres to a sub-formwork made of magnetizable metal, so that it does not fall over, shift, or float when the liquid concrete is poured into the formwork. After the concrete body has hardened and is separated from the formwork, the magnet can be removed again. The connecting element can have at least one reinforcing element that extends from the support element toward the distal end and radially away from the screw channel pipe, connecting the support element and the screw channel pipe. Such reinforcing elements prevent the screw channel pipe from bending or kinking when the liquid concrete is poured (or poured into the formwork) and when the concrete hardens.The invention also relates to a composite comprising at least one support component (preferably several support components) connected to a concrete component on the underside thereof. The support component is preferably a wooden component (in particular a wooden beam), which is why the composite according to the invention is always described below and in the claims as a composite of a concrete component and at least one wooden component. Within the scope of the invention, however, the support component can also be another support component, e.g., a metal component (e.g., a steel or aluminum beam) or a composite material component (e.g., a wood-aluminum composite beam). At least one connector with a support element forming a support plane and a screw channel pipe, which adjoins the support element with a proximal end and projects away from it with a distal end, is arranged in the concrete component.A continuous screw channel is formed through the screw channel pipe, leading to the support plane, with the support plane flush with the underside. A fastening element (in particular a screw) is guided through the screw channel. The fastening element is anchored (in particular screwed) into the wooden component positioned underneath by an anchoring section (in particular a threaded section) and rests with a head (in particular a screw head) on the distal end and / or the step in the concrete channel of the concrete component. This presses the concrete component against the wooden component. The distal end of the screw channel pipe is arranged between the top side of the concrete component and its underside and spaced from the top side. A concrete channel is formed between the top side and the distal end. The head of the fastening element is received in the concrete channel and rests against the distal end and / or a step formed in the concrete channel.The concrete channel has an inner diameter, at least between the step and the top side of the concrete part, that is larger than an inner diameter of the screw channel pipe at its distal end. Preferably, the step is spaced (preferably at least 1 mm, in particular 2 mm or more) from the distal end, so that the head of the fastening element rests only on the step of the concrete component, but not on the distal end. The connector used in the composite is, in particular, a connecting element according to the invention according to one of the embodiments described above, but without its stopper (i.e., freed from its stopper). The invention also relates to a method for producing a composite from a concrete component having a bottom side and a top side, and at least one wooden component. During production, the concrete component is manufactured in a formwork in which at least one connecting element according to the invention is inserted.Preferably, however, a plurality of connecting elements according to the invention are inserted into the formwork. If connecting elements according to the invention with a recess for a mounting magnet are used, the connecting elements can be attached to a sub-formwork made of magnetizable metal so that they do not slip or fall over when the uncured concrete is poured into the formwork. In a positioning step, the concrete component is positioned with its underside on the at least one wooden component (in particular on the plurality of wooden components that are permanently installed in a building, for example). In an intermediate step taking place after the manufacturing step and before or after the positioning step, the connecting element is freed from its plug, i.e., the plug is removed (e.g., pulled out or unscrewed). This exposes a concrete channel in the concrete component that connects the top side to the distal end of the screw channel pipe.The concrete channel has an inner diameter that is larger than the inner diameter of the screw channel pipe at its distal end. In a (final) connection step, a fastening element is guided through the concrete channel and the screw channel. The fastening element is anchored with its anchoring section in the underlying wooden component and rests with its head on the distal end and / or on the concrete component (i.e., on the step of the concrete component formed in the concrete channel). As a result, the concrete component is pressed against the wooden component or firmly clamped and connected to it. Preferably, the concrete component naturally has a plurality of concrete channels and screw channels, since a plurality of connecting elements according to the invention were inserted into the concrete component during the manufacturing step.As a rule, therefore, in the connection step, a plurality of fastening elements are guided through the plurality of concrete channels with adjoining screw channels and anchored in the underlying wooden component(s). In particular, the fastening element or each fastening element rests (directly or indirectly, e.g., via a washer) on the step formed in the concrete channel, and thus directly on the concrete component. The connecting element according to the invention is particularly suitable or intended to be used (freed from the stopper) in the composite according to the invention and in the method according to the invention, or to carry out the method according to the invention. It is understood that features described only for the connecting element can also be adequately implemented in the composite and in the method, and vice versa.Further details, features, and advantages of the invention will become apparent from the following description of a connecting element and a composite according to the invention, with reference to the accompanying drawings, which show preferred embodiments. Fig. 1 shows an isometric view of the connecting element according to the invention. Fig. 2 shows a section through the connecting element shown in Fig. 1. Fig. 3 shows the connecting element according to the invention from Fig. 1 cast into a concrete component. Fig. 4 shows the cast-in connecting element from Fig. 3 with the stopper removed. Fig. 5 shows the connecting element from the preceding figures with the stopper removed in its intended use in a composite according to the invention, namely a wood-concrete composite. Fig. 6 shows a section through the connecting element shown in Fig. 5 or the composite shown in Fig. 5.1 shows an isometric view of the connecting element 1 according to the invention, and FIG. 2 shows a section through the connecting element 1 shown in FIG. 1, the section plane running along a longitudinal axis L of the connecting element 1. In FIG. 3, the connecting element according to the invention from FIG. 1 is shown embedded (i.e., cast in) in a concrete component B. The connecting element 1 has a support element 2, which forms a support plane 3 and, in the embodiment shown, is plate-shaped and has a triangular shape with rounded corners. Directly connected to the support element 2 is a screw channel pipe 4, which extends along the longitudinal axis L and, in the embodiment shown, projects perpendicularly away from the support element 2 or is aligned perpendicular to the support plane 3.The screw channel tube 4 can also be aligned obliquely to the support surface 3, in particular obliquely to the plate-shaped support element 2, and form an acute angle with the support plane 3. The screw channel tube 4 connects to the support element 2 with a proximal end 5 and projects away from the support element 2 with a distal end 6. A continuous screw channel 7 leads through the screw channel tube 4 and the support element 2. At the distal end 6 of the screw channel tube 4, a stopper 8 is arranged, which is received in the screw channel 7 with a first section 9 or, as in the illustrated embodiment, is releasably inserted into the screw channel 7. In an alternative embodiment not shown, the stopper 8 can also be releasably screwed into the screw channel tube 4 via a thread and a corresponding counter-thread on the screw channel tube 4. An outer diameter A. S1of the first section 9 is the same size or smaller, in particular insignificantly smaller, than an inner diameter IRD of the screw channel tube 4 at the distal end 6. The stopper 8 has, in addition to the first section 9, a second section 11. An outer diameter AS2 of the second section 11 is larger than the outer diameter AS1 of the first section 9. In the illustrated embodiment, the first section 9 is connected to the second section 11 via a connecting section 12, so that the first section 9 and the second section 11 are spaced apart from one another by the connecting section 12 (i.e., over the length of the connecting section 12). In particular, as shown in the illustrated embodiment, the distal end 6 of the screw channel tube 4 and the second section 11 are also spaced apart from one another by the connecting section 12 (i.e., over the length of the connecting section 12).The outer diameter AS2 of the second section 11 is larger than an outer diameter A. SV of the connecting section 12. Even if the outer diameter A SV of the connecting section 12 varies over the length of the connecting section 12 (whereby it increases in the direction from the first section 9 to the second section 11), it is everywhere smaller than the outer diameter A S2 of the second section 11. The outer diameter ASV of the connecting section 12 is, in the illustrated embodiment, moreover, over its entire length greater than the inner diameter IRD of the screw channel pipe 4 at the distal end 6. In the illustrated embodiment, the outer diameter A S1 of the first section 9 is essentially the same size as the inner diameter IRD of the screw channel tube 4 at the distal end 6, and the outer diameter ASV of the connecting section 12 is constant over its entire length. The outer diameter A S2of the second section 11 is in the illustrated embodiment larger than the outer diameter ARD of the screw channel tube 4 at the distal end 6 and the outer diameter A SVof the connecting section 12 is essentially the same size as the outer diameter ARD of the screw channel tube 4 at the distal end 6. The stopper 8 rests with the connecting section 12 directly against the distal end 6. The screw channel tube 4 has a proximal section 13 with a larger diameter adjoining the proximal end 5 and a distal section 14 with a smaller diameter adjoining the distal end 6. The inner diameter IRP of the screw channel tube 4 at the proximal end 5 is larger than the inner diameter IRD of the screw channel tube 4 at the distal end 6 (the same also applies to the outer diameters of the sections 13, 14). This forms a type of recess at the proximal end 5, e.g., for receiving a mounting magnet.In the illustrated embodiment, the connecting element 1 has three rib-shaped reinforcing elements 15 that extend from the support element 2 toward the distal end 6 and radially away from the screw channel pipe 4, connecting the support element 2 and the screw channel pipe 4. The support element 2 has three through-openings 16 through which fixing elements (not shown), such as screws or nails, can be guided to fix the connecting element 1 to a substrate, in particular a sub-formwork, if the connecting element 1 is not fixed to the sub-formwork using a mounting magnet (as described above). In Fig. 3, the connecting element is shown already cast in a concrete component B, whereby in Fig. 3 only one connecting element 1 is shown in a small section of the concrete component B. Typically, however, the concrete component B is considerably larger, and several connecting elements 1 according to the invention are cast in it.The support plane 3 of the connecting element 1 is flush with a bottom side 22 of the concrete component B, and the stopper 8 protrudes with its second section 11 at least a small distance beyond a top side 23 of the hardened concrete component B or is essentially flush with the top side 23 of the concrete component B. It is particularly advantageous if the connecting element 1, with the support plane 3, is mounted (e.g., screwed) on a sub-formwork (not shown) resting on the sub-formwork. This sub-formwork, e.g., made of wooden panels, can serve as permanent formwork and can be penetrated (e.g., screwed through) by the fastening element 18 when fastening (e.g., screwing) the concrete component B to the underlying wooden components H. Instead of wooden components H, support components made of a different material, e.g., metal, can also be used. Fig. 4 shows the cast-in connecting element from Fig. 3 with the stopper 8 removed.The connecting element 1 freed of the stopper 8 is referred to in the invention as a connector 10. To remove the stopper 8, it is pulled (or unscrewed) out of the screw channel pipe 4 and the concrete component B, which encloses the connecting section 12 and partially also the second section 11. This leaves a concrete channel 24 in the concrete component B, leading from the top side 23 of the concrete component B to the screw channel pipe 7. Furthermore, a step 17 is formed in the concrete channel 24, spaced apart from the distal end 6 of the screw channel pipe 4 in the direction of the longitudinal axis L. Fig. 5 shows the connecting element 1 from Figures 1 to 4 with the stopper 8 removed and in its intended use in a composite according to the invention, namely a wood-concrete composite, i.e., in a composite comprising a concrete component B and at least one wood component H arranged below (or next to or above) it.A fastening element 18, which has a head 20, is guided through the screw channel 7. In the illustrated embodiment, this fastening element 18 is a screw with a screw head. The fastening element 18, designed as a screw, is anchored (screwed) into the wooden component H by means of an anchoring section 19 designed as a threaded section, and rests with its head 20 (the screw head) against the step 17 via a washer 21. By firmly anchoring (in particular screwing in) the fastening element 18 in the wooden component H, the wooden component H and the concrete component B are firmly clamped together. Fig. 6 shows a section through the assembly shown in Fig. 5, or rather, the connector 10 accommodated therein (= the connecting element 1 freed from the stopper 8) and the fastening element 18 designed as a screw. The section plane runs along the longitudinal axis L of the screw channel 7.List of reference symbols1 Connecting element2 Support element3 Support plane4 Screw channel tube5 Proximal end (screw channel tube)6 Distal end (screw channel tube)7 Screw channel. 8 Stoppel 9 first section (stud)10 connector11 second section (stud)12 connecting section (stud)13 proximal section14 distal section15 reinforcing element16 through opening 17 Stufe 18 Fastening element 19 Anchoring section 20 Kopf 21 Washer 22 Bottom (concrete component) 23 Top (concrete component) 24 Concrete channel L Longitudinal axis B Concrete component H Wooden component IRD Inner diameter of screw channel pipe distal end I RP Inner diameter of screw channel tube proximal end A RD Outer diameter of screw channel tube distal end A S1 Outer diameter of stubble first section A S2 Outer diameter of stubble second section A SV Outer diameter stopper connecting section

Claims

Claims:

1. Connecting element (1) for a wood-concrete composite, with a support element (2) forming a support plane (3), and a screw channel tube (4) which adjoins the support element (3) with a proximal end (5) and projects away from it with a distal end (6), wherein a continuous screw channel (7) leading to the support plane (3) is formed through the screw channel tube (4), characterized in that a detachable stopper (8) is arranged at the distal end (6) of the screw channel tube (4), which has a first section (9) received in the screw channel (7) and a second section (11), wherein the second section (11) has an outer diameter (AS2) that is larger than an inner diameter (IRD) of the screw channel tube (4) at the distal end (6).

2. Connecting element according to claim 1, characterized in that the outer diameter (A S2 ) of the second section (11) is larger than an outer diameter (A RD) of the screw channel tube (4) at the distal end (6).

3. Connecting element according to claim 1 or 2, characterized in that the first section (9) is spaced from the second section (11), as well as from the distal end (6), via a connecting section (12) arranged therebetween, that an outer diameter (ASV) of the connecting section (12) is substantially smaller over its entire length than the outer diameter (AS2) of the second section (11) and larger than the inner diameter (IRD) of the screw channel tube (4) at the distal end (6), in particular at least the same size as the outer diameter (A RD) of the screw channel tube (4) at the distal end (6), and that the connecting section (12) rests against the distal end (6).

4. Connecting element according to claim 1 or 2, characterized in that the second section (11) rests against the distal end (6).

5. Connecting element according to one of claims 1 to 4, characterized in that the support element (2) is plate-shaped and preferably has at least one through-opening (17) radially spaced from the screw channel tube (4) for passing through a fixing element, such as a screw or a nail.

6. Connecting element according to one of claims 1 to 5, characterized in that the support element (2) has connecting means for preferably form-fitting, lateral connection to further support elements (2).

7. Connecting element according to one of claims 1 to 6, characterized in that the first section (9) is inserted into the screw channel (7) or screwed into the screw channel tube (4).8.Connecting element according to one of claims 1 to 7, characterized in that the screw channel tube (4) and thus also the screw channel (7) are aligned substantially perpendicular to the support plane (3) or obliquely to the support plane (3) and enclose an acute angle therewith.

9. Connecting element according to claim 8, characterized in that the acute angle is between 15° and 90°, in particular between 20° and 40°.

10. Connecting element according to one of claims 1 to 9, characterized in that an inner diameter (IRP), and preferably an outer diameter, of the screw channel tube (4) at its proximal end (5) is larger than the inner diameter (IRD) at the distal end (6) of the screw channel tube (4), so that a recess, in particular for receiving a mounting magnet, is formed.

11. Connecting element according to one of claims 1 to 10, characterized in that the connecting element (1) has at least one reinforcing element (15) which extends from the support element (2) towards the distal end (6) and radially away from the screw channel tube (4), and which connects the support element (2) and the screw channel tube (4).

12. Composite comprising at least one wooden component (H) which is connected to a concrete component (B) on an underside (22) thereof, wherein in the concrete component (B) at least one connector (10) with a support element (2) forming a support plane (3),and a screw channel pipe (4) which is connected to the support element (3) with a proximal end (5) and projects away from it with a distal end (6), wherein a continuous screw channel (7) leading to the support plane (3) is formed by the screw channel pipe (4), wherein the support plane (3) terminates flatly with the underside (22), and wherein a fastening element (18) is guided through the screw channel (7), which is anchored by an anchoring section (19) in the wooden component (H) positioned underneath and presses the concrete component (B) against the wooden component (H) with a head (20) resting on the distal end (6) and / or on the step (17) formed in the concrete channel (24) on the concrete component (B), characterized in that the distal end (6) is arranged between an upper side (23) of the concrete component (B) and its underside (22) and from the upper side (23), is spaced apart, that between the upper side (23) and the distal end (6) a concrete channel (24) is formed, which has an inner diameter (IB) which is larger than an inner diameter (I RD) of the screw channel pipe (4) at its distal end (6), and that the head (20) of the fastening element (18) is received in the concrete channel (24) and rests against a step (17) formed in the concrete channel (24).

13. Composite according to claim 12, characterized in that the step (17) is spaced from the distal end (6).

14. Composite according to claim 12 or 13, characterized in that the connector (10) is a connecting element (1) according to one of claims 1 to 11, freed from its stopper (8).15.Method for producing a composite from at least one wooden component (H) and a concrete component (B) with a bottom side (22) and a top side (23), characterized in that ^in a manufacturing step the concrete component (B) is manufactured in a formwork in which at least one connecting element (1) according to one of claims 1 to 11 is positioned,^ in a positioning step the concrete component (B) is positioned with its bottom side (22) on the wooden component (H), ^in an intermediate step taking place after the manufacturing step and before or after the positioning step the connecting element (1) is freed from its stopper (8) and the stopper (8) is removed, whereby a concrete channel (24) connecting the top side (23) to the distal end (6) of the screw channel pipe (4) is exposed in the concrete component (B). a step (17) is formed which is spaced from the surface (23) and preferably from the distal end (6), and^ in a connecting step a fastening element (18) is guided through the concrete channel (24) and the screw channel (7), which is anchored with an anchoring section (19) in the underlying wooden component (H) and rests with a head (20) on the distal end (6) and / or on the step (17) formed in the concrete channel (24) on the concrete component (B) and presses the concrete component (B) against the wooden component (H).

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