EP3339528A1 - Wood concrete connector and fastening assembly - Google Patents

Wood concrete connector and fastening assembly Download PDF

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Publication number
EP3339528A1
EP3339528A1 EP17204554.4A EP17204554A EP3339528A1 EP 3339528 A1 EP3339528 A1 EP 3339528A1 EP 17204554 A EP17204554 A EP 17204554A EP 3339528 A1 EP3339528 A1 EP 3339528A1
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EP
European Patent Office
Prior art keywords
wood
concrete
screw
contact surface
concrete connector
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Granted
Application number
EP17204554.4A
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German (de)
French (fr)
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EP3339528B1 (en
Inventor
Antonio Tresoldi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fischerwerke GmbH and Co KG
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Fischerwerke GmbH and Co KG
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Publication of EP3339528A1 publication Critical patent/EP3339528A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/168—Spacers connecting parts for reinforcements and spacing the reinforcements from the form
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/20—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups of material other than metal or with only additional metal parts, e.g. concrete or plastics spacers with metal binding wires
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B2005/232—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with special provisions for connecting wooden stiffening ribs or other wooden beam-like formations to the concrete slab
    • E04B2005/237—Separate connecting elements

Definitions

  • the invention relates to a wood-concrete connector with the features of the preamble of claim 1 and a mounting arrangement with such a wood-concrete connector.
  • a concrete layer is often applied to an existing wooden ceiling.
  • the concrete layer can serve to improve the sound insulation, but it reinforces in particular the existing ceiling static.
  • power transmission can occur in parallel with the layers, that is, transmission of thrust forces.
  • WO 2015/097663 A1 a wood-concrete connector is known, which serves to produce a shear connection between a substrate made of wood and a concrete layer attached thereto.
  • the wood-concrete connector consists of a sheet metal strip bent so as to have a triangular cross-section.
  • a short side of the triangle is placed on the wood and screwed a screw in 45-degree winding through a long side of the triangle and the opposite right angle in the substrate made of wood.
  • the wood-concrete connectors are oriented on one half of the ceiling in one direction and on the other half in the opposite direction, so that the longitudinal axes of the screws point obliquely to the center of the ceiling.
  • a metal grid is placed at a distance from the substrate made of wood.
  • at least individual rods are attached to the wood-concrete connector, for example by welding.
  • concrete is poured so that both the wood-concrete connectors, and the metal mesh are completely enclosed by concrete. After curing, there is an effective bond between the concrete and the substrate made of wood.
  • the wood-concrete connectors transmit shear forces and the metal grid acts as a reinforcement within the concrete layer.
  • the object of the invention is to facilitate the production of such a wood-concrete composite.
  • the wood-concrete connector according to the invention has a body which has a contact surface for placing on a substrate made of wood.
  • the body has a screw receptacle for a screw, with which the body is festschraubbar to the ground.
  • a screw receptacle is meant a geometry suitable for receiving a screw in a predetermined orientation.
  • the geometry may be, for example, a cylindrical recess or two holes, wherein the geometry need not be closed over the circumference.
  • the screw receptacle is designed such that a screw is received with its longitudinal axis of the screw at an angle of 20 to 80 degrees, in particular from 30 to 60 degrees, and preferably from 40 to 50 degrees, to the contact surface of the body. This ensures that the screw with which the body is properly attached to the ground of wood, is screwed in a defined angle through the body into the wood.
  • the body also has a receiving device in such a way that a rod of a metal grid can be received parallel to the contact surface of the receiving device.
  • “Absorbable” here does not necessarily mean that the rod is held by the receiving device, which is not excluded.
  • the receiving device may comprise, for example, a snap device and / or a closing device by which the rod is held in a form-fitting manner.
  • the receiving device mainly serves the placement of the metal grid, that is, a rod of the metal grid is so far in the receiving device, that it is held centering and is secured substantially against displacement.
  • the receiving device is groove-shaped.
  • a groove allows the rod of the metal grid can be easily absorbed.
  • the metal grid can first be roughly positioned so that the metal bar rests anywhere on the body to then merely move the metal grid until the metal bar slides into the groove-shaped receiving device.
  • the groove-shaped receiving device can be so narrow that the rod rests only as in a notch with a small part of its cross section, or be so wide that the cross section of the rod is completely absorbed.
  • the body is configured and mounted such that the thrust direction to which the screws are aligned corresponds to the direction of the rod received by the receiver.
  • the invention therefore proposes that the screw defines an imaginary thrust plane in which the longitudinal axis of the screw lies, wherein the thrust plane is perpendicular to the abutment surface.
  • the receiving device is formed by a recess with a longitudinal direction. This longitudinal direction is substantially parallel to the contact surface and substantially parallel to the thrust plane.
  • the longitudinal extension direction can lie in particular in the thrust plane. If the wood-concrete connector has two screw receptacles, which is preferred, then the receptacle lies in particular centrally between the two screw receptacles.
  • the body also has a pointed protrusion that protrudes away from the abutment surface.
  • This projection serves to pre-fix the body nail-like in the base of wood before the body is fastened with the screw.
  • the contact surface is thus actually only on the ground of wood, when the projection is driven into the wood.
  • several wood-concrete connectors can first be aligned along a line and pre-fixed with a hammer by means of the projections in such a way that they can no longer slip.
  • the pointed projection can contribute as much as possible to the transmission of shear forces on the substrate made of wood, it has in particular a substantially triangular cross section, one side of which is substantially perpendicular to the contact surface and the other side is substantially parallel to the screw longitudinal axis.
  • the body has an impact surface substantially parallel to the abutment surface for receiving impacts of a hammer.
  • a face clarifies to the user that a hammer can be used. But it also clarifies where to beat.
  • the body can be designed so that the forces generated by the blows are well distributed in the body. Essential for the design of the geometry are also the forces in the finished composite between the concrete and the substrate made of wood over the body and the screw will be transferred.
  • the body is preferably designed so that little material is necessary for the production and on the other hand there is an effective resistance to the said forces.
  • the body For transmitting forces between the concrete and the body, the body preferably has an undercut on an outer side, viewed from a side facing away from the contact surface. This ensures that the concrete is secured by positive engagement on the body against lifting perpendicular to the contact surface, as may occur in complex stress conditions in a ceiling of a wood-concrete composite.
  • the fastening arrangement according to the invention comprises a wood-concrete connector, as described above, and at least one screw, with which the wood-concrete connector is screwed to a wooden base.
  • a metal grid is located in the receiving device and the wood-concrete connector is arranged in a layer of concrete.
  • the wood-concrete connector 1 shown in the figures has a body 2 made of plastic. Like from the Figures 1 and 2 becomes clear, the body 2 on a bottom 3 a rectangular contact surface 4. A top 5 forms a striking surface 6, which is slightly narrower, but longer than the contact surface 4, said striking surface 6 is not formed continuously.
  • the striking surface 6 is interrupted centrally transversely to its longitudinal extent by a groove-shaped recess 7, which forms a receiving device 8 for a rod 9 of a metal grid 10, whereupon in the course of Description to FIG. 3 will be discussed further.
  • two pockets 11 are arranged on the right and left of the recess 7, which serve only to save material.
  • the screw 15 From the front side 12 extends from each recess right and left of the recess 7 a screw 15 in the form of a cylindrical hole 16 with a conical mouth 17 to the contact surface 4.
  • the screw receptacle 15 is with its longitudinal extent perpendicular to the front side 12 and thus in the 45-degree Angle to the contact surface 4 is arranged.
  • the helical longitudinal axis S of a screw 18 introduced into the screw receptacle 15, as it is for a better overview only in FIG. 3 is shown is thus accommodated at an angle of 45 degrees to the contact surface 4.
  • the projections 19 each have a triangular cross-section in two mutually perpendicular planes.
  • a rear side 20 of the projection 18 extends perpendicular to the contact surface 4 and a front side 21 parallel to the screw longitudinal axis S.
  • FIG. 3 the use of the wood-concrete connector 1 is shown in a fastening arrangement 22 according to the invention.
  • a substrate 23 made of wood several wood-concrete connectors 1 are arranged in a row.
  • the wood-concrete connector 1 are first placed and aligned along a line (not shown) that a longitudinal direction A of the receiving devices 8 of the body 2 are parallel to this line.
  • This helps an arrow contour 29, which is mounted centrally, down on the front side 12.
  • the longitudinal extension direction A is arranged parallel to a thrust plane ES, which is arranged perpendicular to the contact surface 4 and is defined by the longitudinal axis S of the screw.
  • the top level ES is consistent with the cutting plane of the FIG. 2 match.
  • a metal grid 10 is placed roughly positioned on the bodies 2, wherein the metal grid 10 does not have to rest on all the bodies 2.
  • the metal grid 10 consists of a plurality of rods 9, which are arranged parallel and perpendicular to each other.
  • the metal grid 10 is then slightly displaced until at least one rod 9 slips into the receiving device 8 of the body 2 and is thus received by the body 2. As in FIG. 3 can be seen, the rod 9 is not completely in the receiving device 8, but protrudes similar to a notch only partially into it. Finally, a layer of concrete 25 is applied by casting, so that finally both the wood-concrete connector 1 and the metal grid 10 are completely enclosed. In particular, on the rear sides 13 of the body 2 can be transmitted parallel to the contact surface 4 acting forces of the layer of concrete 25 on the wood-concrete connector 1. About the screws 18, they are derived in the substrate 23 made of wood. The first undercut 14 also prevents lifting of the layer of concrete 25 from the substrate 23. Further undercuts 26, which are respectively arranged opposite to end faces 27 of the body 2 (see also FIG. 1 ) also contribute to this. The end faces 27 and the rear side 13 form outer sides 28 with undercuts 14, 26th

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

Die Erfindung betrifft einen Holz-Beton-Verbinder (1) und eine Befestigungsanordnung (22) mit diesem Holz-Beton-Verbinder (1), der Schubkräfte von einer Schicht aus Beton (25) in einen Untergrund (23) aus Holz überträgt. Der Holz-Beton-Verbinder (1) weist einen Körper (2) auf, der eine Anlagefläche (4) zum Aufsetzen auf den Untergrund (23) aus Holz und eine Schraubenaufnahme (15) derart aufweist, dass eine Schraube (18) in einem Winkel von 45 Grad vom Körper (2) aufgenommen ist. Damit ein Metallgitter (10) zur Bewehrung der Schicht aus Beton 25 leichter zu positionieren ist, schlägt die Erfindung vor, dass der Körper (2) eine Aufnahmeeinrichtung (8) derart aufweist, dass ein Stab (9) des Metallgitters (10) parallel zur Anlagefläche (4) von der Aufnahmeeinrichtung (8) aufnehmbar ist.

Figure imgaf001
The invention relates to a wood-concrete connector (1) and a fastening arrangement (22) with this wood-concrete connector (1), which transfers shear forces from a layer of concrete (25) in a substrate (23) made of wood. The wood-concrete connector (1) has a body (2) having a bearing surface (4) for placing on the substrate (23) made of wood and a screw receptacle (15) such that a screw (18) in one Angle of 45 degrees from the body (2) is recorded. In order to make it easier to position a metal grid (10) for reinforcing the layer of concrete 25, the invention proposes that the body (2) has a receiving device (8) such that a bar (9) of the metal grid (10) is parallel to Contact surface (4) of the receiving device (8) is receivable.
Figure imgaf001

Description

Die Erfindung betrifft einen Holz-Beton-Verbinder mit den Merkmalen des Oberbegriffs des Anspruchs 1 sowie eine Befestigungsanordnung mit einem derartigen Holz-Beton-Verbinder.The invention relates to a wood-concrete connector with the features of the preamble of claim 1 and a mounting arrangement with such a wood-concrete connector.

Insbesondere bei der Sanierung von Altbauten wird häufig auf eine bestehende Holzdecke eine Betonschicht aufgebracht. Die Betonschicht kann der Verbesserung der Schallisolierung dienen, sie verstärkt aber insbesondere die bestehende Decke statisch. Damit eine statische Verstärkung erreicht werden kann, ist es jedoch erforderlich, dass eine Kraftübertragung parallel zu den Schichten erfolgen kann, also eine Übertragung von Schubkräften. Aus der Druckschrift WO 2015/097663 A1 ist ein Holz-Beton-Verbinder bekannt, der dazu dient, eine Schubverbindung zwischen einem Untergrund aus Holz und einer hierauf angebrachten Betonschicht herzustellen. Der Holz-Beton-Verbinder besteht aus einem Blechstreifen, der derart gebogen ist, dass er einen dreieckigen Querschnitt aufweist. Eine kurze Seite des Dreiecks wird auf das Holz aufgesetzt und eine Schraube im 45-Grad-Wickel durch eine Langseite des Dreiecks und den gegenüberliegenden rechten Winkel in den Untergrund aus Holz geschraubt. Die Holz-Beton-Verbinder werden dabei auf einer Hälfte der Decke in die eine und auf der anderen Hälfte in die entgegengesetzte Richtung orientiert, so dass die Schraubenlängsachsen jeweils schräg zur Mitte der Decke weisen. In einem weiteren Schritt wird ein Metallgitter mit Abstand zum Untergrund aus Holz platziert. Hierzu werden zumindest einzelne Stäbe an dem Holz-Beton-Verbinder befestigt, beispielsweise durch Schweißen. Anschließend wird Beton derart vergossen, dass sowohl die Holz-Beton-Verbinder, als auch das Metallgitter vollständig von Beton umschlossen sind. Nach dem Aushärten besteht ein wirksamer Verbund zwischen Beton und Untergrund aus Holz. Die Holz-Beton-Verbinder übertragen dabei Schubkräfte und das Metallgitter wirkt als Bewehrung innerhalb der Betonschicht.In particular, in the renovation of old buildings, a concrete layer is often applied to an existing wooden ceiling. The concrete layer can serve to improve the sound insulation, but it reinforces in particular the existing ceiling static. However, for static gain to be achieved, it is necessary that power transmission can occur in parallel with the layers, that is, transmission of thrust forces. From the publication WO 2015/097663 A1 a wood-concrete connector is known, which serves to produce a shear connection between a substrate made of wood and a concrete layer attached thereto. The wood-concrete connector consists of a sheet metal strip bent so as to have a triangular cross-section. A short side of the triangle is placed on the wood and screwed a screw in 45-degree winding through a long side of the triangle and the opposite right angle in the substrate made of wood. The wood-concrete connectors are oriented on one half of the ceiling in one direction and on the other half in the opposite direction, so that the longitudinal axes of the screws point obliquely to the center of the ceiling. In a further step, a metal grid is placed at a distance from the substrate made of wood. For this purpose, at least individual rods are attached to the wood-concrete connector, for example by welding. Subsequently, concrete is poured so that both the wood-concrete connectors, and the metal mesh are completely enclosed by concrete. After curing, there is an effective bond between the concrete and the substrate made of wood. The wood-concrete connectors transmit shear forces and the metal grid acts as a reinforcement within the concrete layer.

Aufgabe der Erfindung ist, die Herstellung eines derartigen Holz-Beton-Verbunds zu erleichtern.The object of the invention is to facilitate the production of such a wood-concrete composite.

Diese Aufgabe wird erfindungsgemäß durch den Holz-Beton-Verbinder mit den Merkmalen des Anspruchs 1 sowie durch eine Befestigungsanordnung mit einem derartigen Holz-Beton-Verbinder nach Anspruch 7 gelöst. Der erfindungsgemäße Holz-Beton-Verbinder weist einen Körper auf, der eine Anlagefläche zum Aufsetzen auf einen Untergrund aus Holz aufweist. Darüber hinaus weist der Körper eine Schraubenaufnahme für eine Schraube auf, mit der der Körper am Untergrund festschraubbar ist. Mit einer Schraubenaufnahme ist eine Geometrie gemeint, die dazu geeignet ist, eine Schraube in einer vorbestimmten Ausrichtung aufzunehmen. Die Geometrie kann beispielsweise eine zylindrische Ausnehmung oder zwei Löcher sein, wobei die Geometrie nicht über den Umfang geschlossen sein muss. Die Schraubenaufnahme ist derart ausgebildet, dass eine Schraube mit ihrer Schraubenlängsachse in einem Winkel von 20 bis 80 Grad, insbesondere von 30 bis 60 Grad und vorzugsweise von 40 bis 50 Grad, zur Anlagefläche vom Körper aufgenommen ist. Hierdurch wird erreicht, dass die Schraube, mit der der Körper bestimmungsgemäß am Untergrund aus Holz befestigt wird, in einem definierten Winkel durch den Körper hindurch in das Holz eingeschraubt wird. Erfindungsgemäß weist der Körper außerdem eine Aufnahmeeinrichtung derart auf, dass ein Stab eines Metallgitters parallel zur Anlagefläche von der Aufnahmeeinrichtung aufnehmbar ist. "Aufnehmbar" meint hier nicht unbedingt, dass der Stab mittels der Aufnahmeeinrichtung festgehalten wird, wobei dies nicht ausgeschlossen ist. So kann die Aufnahmeeinrichtung beispielsweise eine Schnappeinrichtung und/oder eine Schließeinrichtung umfassen, durch die der Stab formschlüssig gehalten wird. Vorzugsweise dient die Aufnahmeeinrichtung jedoch vorwiegend der Platzierung des Metallgitters, das heißt ein Stab des Metallgitters liegt so weit in der Aufnahmeeinrichtung ein, dass er zentrierend gehalten wird und im Wesentlichen gegen Verschieben gesichert ist.This object is achieved by the wood-concrete connector with the features of claim 1 and by a mounting arrangement with such a wood-concrete connector according to claim 7. The wood-concrete connector according to the invention has a body which has a contact surface for placing on a substrate made of wood. In addition, the body has a screw receptacle for a screw, with which the body is festschraubbar to the ground. By a screw receptacle is meant a geometry suitable for receiving a screw in a predetermined orientation. The geometry may be, for example, a cylindrical recess or two holes, wherein the geometry need not be closed over the circumference. The screw receptacle is designed such that a screw is received with its longitudinal axis of the screw at an angle of 20 to 80 degrees, in particular from 30 to 60 degrees, and preferably from 40 to 50 degrees, to the contact surface of the body. This ensures that the screw with which the body is properly attached to the ground of wood, is screwed in a defined angle through the body into the wood. According to the invention, the body also has a receiving device in such a way that a rod of a metal grid can be received parallel to the contact surface of the receiving device. "Absorbable" here does not necessarily mean that the rod is held by the receiving device, which is not excluded. Thus, the receiving device may comprise, for example, a snap device and / or a closing device by which the rod is held in a form-fitting manner. Preferably, however, the receiving device mainly serves the placement of the metal grid, that is, a rod of the metal grid is so far in the receiving device, that it is held centering and is secured substantially against displacement.

In einer bevorzugten Ausführungsform ist die Aufnahmeeinrichtung nutförmig. Im Vergleich zu beispielsweise abstehenden Stegen als Aufnahmeeinrichtung, ermöglicht eine Nut, dass der Stab des Metallgitters sehr leicht aufgenommen werden kann. So kann das Metallgitter zunächst grob so platziert werden, dass der Metallstab irgendwo auf dem Körper aufliegt, um das Metallgitter dann lediglich zu verschieben, bis der Metallstab in die nutförmige Aufnahmeeinrichtung hinein rutscht. Insbesondere bei einer Vielzahl von Holz-Beton-Verbindern erleichtert dies erheblich die Ausrichtung des Metallgitters. Die nutförmige Aufnahmeeinrichtung kann dabei so eng sein, dass der Stab nur wie in einer Kerbe mit einem geringen Teil seines Querschnitts einliegt, oder so breit sein, dass der Querschnitt des Stabes vollständig aufgenommen wird.In a preferred embodiment, the receiving device is groove-shaped. In comparison to, for example, projecting webs as a receiving device, a groove allows the rod of the metal grid can be easily absorbed. Thus, the metal grid can first be roughly positioned so that the metal bar rests anywhere on the body to then merely move the metal grid until the metal bar slides into the groove-shaped receiving device. In particular, in a variety of wood-concrete connectors, this significantly facilitates the alignment of the Metal grid. The groove-shaped receiving device can be so narrow that the rod rests only as in a notch with a small part of its cross section, or be so wide that the cross section of the rod is completely absorbed.

Vorzugsweise ist der Körper so gestaltet und montiert, dass die Schubrichtung, auf die die Schrauben ausgerichtet sind, der Richtung des von der Aufnahmeeinrichtung aufgenommenen Stabes entspricht. Die Erfindung schlägt daher vor, dass die Schraube eine gedachte Schubebene definiert, in der die Schraubenlängsachse liegt, wobei die Schubebene senkrecht zur Anlagefläche steht. Die Aufnahmeeinrichtung ist durch eine Ausnehmung mit einer Längserstreckungsrichtung gebildet. Diese Längserstreckungsrichtung ist im Wesentlichen parallel zur Anlagefläche und im Wesentlichen parallel zur Schubebene. Die Längserstreckungsrichtung kann insbesondere in der Schubebene liegen. Weist der Holz-Beton-Verbinder zwei Schraubenaufnahmen auf, was bevorzugt ist, dann liegt die Aufnahme insbesondere mittig zwischen den beiden Schraubenaufnahmen.Preferably, the body is configured and mounted such that the thrust direction to which the screws are aligned corresponds to the direction of the rod received by the receiver. The invention therefore proposes that the screw defines an imaginary thrust plane in which the longitudinal axis of the screw lies, wherein the thrust plane is perpendicular to the abutment surface. The receiving device is formed by a recess with a longitudinal direction. This longitudinal direction is substantially parallel to the contact surface and substantially parallel to the thrust plane. The longitudinal extension direction can lie in particular in the thrust plane. If the wood-concrete connector has two screw receptacles, which is preferred, then the receptacle lies in particular centrally between the two screw receptacles.

Vorzugsweise weist der Körper außerdem einen spitzen Vorsprung auf, der von der Anlagefläche weg ragt. Dieser Vorsprung dient dazu, den Körper nagelartig in dem Untergrund aus Holz vorzufixieren, bevor der Körper mit der Schraube befestigt wird. Die Anlagefläche liegt also erst dann tatsächlich am Untergrund aus Holz an, wenn der Vorsprung in das Holz getrieben ist. Mehrere Holz-Beton-Verbinder können so zunächst beispielsweise entlang einer Linie ausgerichtet werden und mit einem Hammer mittels der Vorsprünge derart vorfixiert werden, dass sie nicht mehr verrutschen können. Damit der spitze Vorsprung möglichst viel zur Übertragung von Schubkräften auf den Untergrund aus Holz beitragen kann, weist er insbesondere einen im Wesentlichen dreieckigen Querschnitt auf, dessen eine Seite im Wesentlichen senkrecht zur Anlagefläche und dessen andere Seite im Wesentlichen parallel zur Schraubenlängsachse verläuft.Preferably, the body also has a pointed protrusion that protrudes away from the abutment surface. This projection serves to pre-fix the body nail-like in the base of wood before the body is fastened with the screw. The contact surface is thus actually only on the ground of wood, when the projection is driven into the wood. For example, several wood-concrete connectors can first be aligned along a line and pre-fixed with a hammer by means of the projections in such a way that they can no longer slip. So that the pointed projection can contribute as much as possible to the transmission of shear forces on the substrate made of wood, it has in particular a substantially triangular cross section, one side of which is substantially perpendicular to the contact surface and the other side is substantially parallel to the screw longitudinal axis.

Um diese Vorfixierung zu erleichtern, weist der der Körper eine zur Anlagefläche im Wesentlichen parallele Schlagfläche zur Aufnahme von Schlägen eines Hammers auf. Eine Schlagfläche verdeutlicht einerseits dem Verwender, dass ein Hammer verwendet werden kann. Sie verdeutlicht aber auch, wo geschlagen werden soll. Der Körper kann so gestaltet werden, dass die durch die Schläge erzeugten Kräfte gut im Körper verteilt werden. Wesentlich für die Auslegung der Geometrie sind außerdem die Kräfte, die im fertig erstellten Verbund zwischen Beton und Untergrund aus Holz über den Körper und die Schraube übertragen werden. Der Körper ist vorzugweise so gestaltet, dass zur Herstellung wenig Material notwendig ist und andererseits ein wirkungsvoller Widerstand gegen die genannten Kräfte besteht.In order to facilitate this prefixing, the body has an impact surface substantially parallel to the abutment surface for receiving impacts of a hammer. On the one hand, a face clarifies to the user that a hammer can be used. But it also clarifies where to beat. The body can be designed so that the forces generated by the blows are well distributed in the body. Essential for the design of the geometry are also the forces in the finished composite between the concrete and the substrate made of wood over the body and the screw will be transferred. The body is preferably designed so that little material is necessary for the production and on the other hand there is an effective resistance to the said forces.

Zur Übertragung von Kräften zwischen Beton und Körper weist der Körper vorzugsweise von einer der Anlagefläche abgewandten Seite aus gesehen an einer Außenseite eine Hinterschneidung auf. Hierdurch wird sichergestellt, dass der Beton durch Formschluss am Körper gegen ein Abheben senkrecht zur Anlagefläche gesichert ist, wie es bei komplexen Spannungszuständen in einer Decke aus einem Holz-Beton-Verbund auftreten kann.For transmitting forces between the concrete and the body, the body preferably has an undercut on an outer side, viewed from a side facing away from the contact surface. This ensures that the concrete is secured by positive engagement on the body against lifting perpendicular to the contact surface, as may occur in complex stress conditions in a ceiling of a wood-concrete composite.

Die erfindungsgemäße Befestigungsanordnung weist einen Holz-Beton-Verbinder auf, wie er oben beschrieben ist, sowie mindestens eine Schraube, mit dem der Holz-Beton-Verbinder an einen Untergrund aus Holz geschraubt ist. Ein Metallgitter liegt in der Aufnahmeeinrichtung ein und der Holz-Beton-Verbinder ist in einer Schicht aus Beton angeordnet.The fastening arrangement according to the invention comprises a wood-concrete connector, as described above, and at least one screw, with which the wood-concrete connector is screwed to a wooden base. A metal grid is located in the receiving device and the wood-concrete connector is arranged in a layer of concrete.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels erläutert.The invention will be explained below with reference to an embodiment.

Es zeigen:

Figur 1
den Körper des erfindungsgemäßen Holz-Beton-Verbinders in einer perspektivischen Darstellung;
Figur 2
eine Schnittdarstellung desselben Körpers; und
Figur 3
eine erfindungsgemäße Befestigungsanordnung mit demselben Körper in einer perspektivischen Schnittdarstellung.
Show it:
FIG. 1
the body of the wood-concrete connector according to the invention in a perspective view;
FIG. 2
a sectional view of the same body; and
FIG. 3
a fastening arrangement according to the invention with the same body in a perspective sectional view.

Der in den Figuren dargestellte Holz-Beton-Verbinder 1 weist einen Körper 2 aus Kunststoff auf. Wie aus den Figuren 1 und 2 deutlich wird, weist der Köper 2 auf einer Unterseite 3 eine rechteckige Anlagefläche 4 auf. Eine Oberseite 5 bildet eine Schlagfläche 6, die etwas schmaler, dafür aber länger als die Anlagefläche 4 ist, wobei diese Schlagfläche 6 nicht durchgängig ausgebildet ist. Die Schlagfläche 6 ist mittig quer zur ihrer Längserstreckung von einer nutförmigen Ausnehmung 7 unterbrochen, die eine Aufnahmeeinrichtung 8 für einen Stab 9 eines Metallgitters 10 bildet, worauf im Zuge der Beschreibung zu Figur 3 noch weiter eingegangen wird. Außerdem sind rechts und links der Ausnehmung 7 je zwei Taschen 11 angeordnet, die aber lediglich der Materialeinsparung dienen. Von der Schlagfäche 6 fällt einer Vorderseite 12 schräg zur Anlagefläche 4 hin ab, so dass die Vorderseite 12 in einem 45-Grad-Winkel zur Anlagefläche 4 steht. Gegenüberliegend der Vorderseite 12 fällt eine Hinterseite 13 von der Schlagfläche 6 zunächst senkrecht zur Schlagfläche 6 und dann ab etwa halber Höhe leicht schräg zur Vorderseite 12 hin geneigt ab. Senkrecht von einer der Anlagefläche 4 abgewandten Seite aus in Richtung der Schlagfläche 6 und der Anlagefläche 4 gesehen, ist dieser geneigte Teil der Hinterseite 13 nicht zu sehen und bildet eine erste Hinterschneidung 14.The wood-concrete connector 1 shown in the figures has a body 2 made of plastic. Like from the Figures 1 and 2 becomes clear, the body 2 on a bottom 3 a rectangular contact surface 4. A top 5 forms a striking surface 6, which is slightly narrower, but longer than the contact surface 4, said striking surface 6 is not formed continuously. The striking surface 6 is interrupted centrally transversely to its longitudinal extent by a groove-shaped recess 7, which forms a receiving device 8 for a rod 9 of a metal grid 10, whereupon in the course of Description to FIG. 3 will be discussed further. In addition, two pockets 11 are arranged on the right and left of the recess 7, which serve only to save material. From the impact surface 6 of a front side 12 falls obliquely from the contact surface 4 out, so that the front side 12 is at a 45-degree angle to the contact surface 4. Opposite the front 12 falls a rear side 13 of the striking surface 6 initially perpendicular to the face 6 and then from about half height slightly obliquely inclined to the front side 12 from inclined. Seen perpendicularly from a side facing away from the contact surface 4 in the direction of the impact surface 6 and the contact surface 4, this inclined part of the rear side 13 is not visible and forms a first undercut 14th

Von der Vorderseite 12 aus erstreckt sich jeweils rechts und links der Ausnehmung 7 eine Schraubenaufnahme 15 in Form eines zylindrischen Lochs 16 mit einer konischer Mündung 17 zur Anlagefläche 4. Die Schraubenaufnahme 15 ist mit ihrer Längserstreckung senkrecht zur Vorderseite 12 und somit im 45-Grad-Winkel zur Anlagefläche 4 angeordnet. Die Schraubenlängssachse S einer in die Schraubenaufnahme 15 eingebrachten Schraube 18, wie es zur besseren Übersicht nur in Figur 3 dargestellt ist, ist somit in einem Winkel von 45 Grad zur Anlagefläche 4 aufgenommen.From the front side 12 extends from each recess right and left of the recess 7 a screw 15 in the form of a cylindrical hole 16 with a conical mouth 17 to the contact surface 4. The screw receptacle 15 is with its longitudinal extent perpendicular to the front side 12 and thus in the 45-degree Angle to the contact surface 4 is arranged. The helical longitudinal axis S of a screw 18 introduced into the screw receptacle 15, as it is for a better overview only in FIG. 3 is shown is thus accommodated at an angle of 45 degrees to the contact surface 4.

Von der Anlagefläche 4 ragen drei spitze Vorsprünge 19 weg ab, von denen in Figur 1 allerdings einer verdeckt ist. Die Vorsprünge 19 weisen in zwei zueinander senkrechten Ebenen jeweils einen dreieckigen Querschnitt auf. Dabei verläuft eine hintere Seite 20 des Vorsprungs 18 senkrecht zur Anlagefläche 4 und eine vordere Seite 21 parallel zur Schraubenlängsachse S.From the contact surface 4 protrude three pointed projections 19 away, of which in FIG. 1 However, one is hidden. The projections 19 each have a triangular cross-section in two mutually perpendicular planes. In this case, a rear side 20 of the projection 18 extends perpendicular to the contact surface 4 and a front side 21 parallel to the screw longitudinal axis S.

In Figur 3 ist die Verwendung des Holz-Beton-Verbinders 1 in einer erfindungsgemäßen Befestigungsanordnung 22 dargestellt. Auf einen Untergrund 23 aus Holz sind mehrere Holz-Beton-Verbinder 1 in einer Reihe angeordnet. Dazu werden die Holz-Beton-Verbinder 1 zunächst aufgesetzt und derart entlang einer Linie (nicht dargestellt) ausgerichtet, dass eine Längserstreckungsrichtung A der Aufnahmeeinrichtungen 8 der Körper 2 parallel zu dieser Linie stehen. Dabei hilft eine Pfeilkontur 29, die mittig, unten auf der Vorderseite 12 angebracht ist. Die Längserstreckungsrichtung A ist parallel zu einer Schubebene ES angeordnet, die senkrecht zur Anlagefläche 4 angeordnet ist und durch die Schraubenlängsachse S definiert ist. Die Schubebene ES stimmt mit der Schnittebene der Figur 2 überein. Mit einem Hammer (nicht dargestellt) werden die Körper 2 mit den Vorsprüngen 19 voran in den Untergrund 23 getrieben, bis die Anlagefläche 4 aufliegt. Im nächsten Schritt werden Schrauben 18 durch die Schraubenaufnahmen 15 hindurch in den Untergrund 23 geschraubt, bis Köpfe 24 der Schrauben 18 in der Mündung 17 zur Anlage kommen. Beim Schrauben können die Körper 2 nicht verrutschen, da die Vorsprünge 19 sie gegen Verrutschen sichern. Wenn derart alle Körper 2 am Untergrund 23 befestigt sind, wird ein Metallgitter 10 grob positioniert auf die Körper 2 aufgelegt, wobei das Metallgitter 10 nicht auf allen Körpern 2 aufliegen muss. Das Metallgitter 10 besteht aus einer Vielzahl von Stäben 9, die parallel und senkrecht zueinander angeordnet sind. Das Metallgitter 10 wird dann noch leicht verschoben, bis zumindest ein Stab 9 in die Aufnahmevorrichtung 8 des Körpers 2 rutscht und somit vom Körper 2 aufgenommen wird. Wie in Figur 3 zu erkennen ist, liegt der Stab 9 nicht vollständig in der Aufnahmevorrichtung 8 ein, sondern ragt ähnlich wie bei einer Kerbe nur teilweise hinein. Abschließend wird eine Schicht aus Beton 25 durch Gießen aufgebracht, derart, dass schließlich sowohl die Holz-Beton-Verbinder 1 als auch das Metallgitter 10 vollständig umschlossen sind. Insbesondere über die Hinterseiten 13 der Körper 2 können parallel zur Anlagefläche 4 wirkende Kräfte von der Schicht aus Beton 25 auf den Holz-Beton-Verbinder 1 übertragen werden. Über die Schrauben 18 werden sie in den Untergrund 23 aus Holz abgeleitet. Die erste Hinterschneidung 14 verhindert außerdem ein Abheben der Schicht aus Beton 25 vom Untergrund 23. Weitere Hinterschneidungen 26, die jeweils gegenüberliegend an Stirnseiten 27 des Körpers 2 angeordnet sind (siehe auch Figur 1) tragen ebenfalls hierzu bei. Die Stirnseiten 27 und die Hinterseite 13 bilden Außenseiten 28 mit Hinterschneidungen 14, 26.In FIG. 3 the use of the wood-concrete connector 1 is shown in a fastening arrangement 22 according to the invention. On a substrate 23 made of wood several wood-concrete connectors 1 are arranged in a row. For this purpose, the wood-concrete connector 1 are first placed and aligned along a line (not shown) that a longitudinal direction A of the receiving devices 8 of the body 2 are parallel to this line. This helps an arrow contour 29, which is mounted centrally, down on the front side 12. The longitudinal extension direction A is arranged parallel to a thrust plane ES, which is arranged perpendicular to the contact surface 4 and is defined by the longitudinal axis S of the screw. The top level ES is consistent with the cutting plane of the FIG. 2 match. With a hammer (not shown) are the Body 2 driven with the projections 19 first in the ground 23 until the contact surface 4 rests. In the next step, screws 18 are screwed through the screw receptacles 15 into the substrate 23 until heads 24 of the screws 18 come to rest in the mouth 17. When screwing the body 2 can not slip, as the projections 19 secure against slipping. If in this way all the bodies 2 are fastened to the base 23, a metal grid 10 is placed roughly positioned on the bodies 2, wherein the metal grid 10 does not have to rest on all the bodies 2. The metal grid 10 consists of a plurality of rods 9, which are arranged parallel and perpendicular to each other. The metal grid 10 is then slightly displaced until at least one rod 9 slips into the receiving device 8 of the body 2 and is thus received by the body 2. As in FIG. 3 can be seen, the rod 9 is not completely in the receiving device 8, but protrudes similar to a notch only partially into it. Finally, a layer of concrete 25 is applied by casting, so that finally both the wood-concrete connector 1 and the metal grid 10 are completely enclosed. In particular, on the rear sides 13 of the body 2 can be transmitted parallel to the contact surface 4 acting forces of the layer of concrete 25 on the wood-concrete connector 1. About the screws 18, they are derived in the substrate 23 made of wood. The first undercut 14 also prevents lifting of the layer of concrete 25 from the substrate 23. Further undercuts 26, which are respectively arranged opposite to end faces 27 of the body 2 (see also FIG. 1 ) also contribute to this. The end faces 27 and the rear side 13 form outer sides 28 with undercuts 14, 26th

BezugszeichenlisteLIST OF REFERENCE NUMBERS Holz-Beton-Verbinder und BefestigungsanordnungWood-concrete connector and mounting arrangement

11
Holz-Beton-VerbinderWood concrete connector
22
Körperbody
33
Unterseitebottom
44
Anlageflächecontact surface
55
Oberseitetop
66
SchlagflächePlaying surface
77
Ausnehmungrecess
88th
Aufnahmeeinrichtungrecording device
99
StabRod
1010
Metallgittermetal grid
1111
Taschebag
1212
Vorderseitefront
1313
Hinterseiteback
1414
erste Hinterschneidungfirst undercut
1515
Schraubenaufnahmescrew receptacle
1616
Lochhole
1717
Mündungmuzzle
1818
Schraubescrew
1919
Vorsprunghead Start
2020
hintere Seite des Vorsprungs 18rear side of the projection 18
2121
vordere Seite des Vorsprungs 18front side of the projection 18
2222
Befestigungsanordnungmounting assembly
2323
Untergrund aus HolzBackground made of wood
2424
Kopf der Schraube 18Head of the screw 18
2525
Schicht aus BetonLayer of concrete
2626
weitere Hinterschneidungfurther undercut
2727
Stirnseitefront
2828
Außenseiteoutside
2929
Pfeilkonturarrow shape
AA
Längserstreckungsrichtung der Aufnahmeeinrichtung 8Longitudinal direction of the receiving device. 8
ESIT
Schubebenethrust level
SS
Schraubenlängsachsescrew longitudinal axis

Claims (7)

Holz-Beton-Verbinder (1) mit einem Körper (2), der eine Anlagefläche (4) zum Aufsetzen auf einen Untergrund (23) aus Holz und eine Schraubenaufnahme (15) derart aufweist, dass eine Schraube (18), mit der der Körper (2) am Untergrund (23) festschraubbar ist, mit ihrer Schraubenlängsachse (S) in einem Winkel von 20 bis 80 Grad, insbesondere von 30 bis 60 Grad und vorzugsweise von 40 bis 50 Grad, zur Anlagefläche (4) vom Körper (2) aufgenommen ist, dadurch gekennzeichnet, dass der Körper (2) eine Aufnahmeeinrichtung (8) derart aufweist, dass ein Stab (9) eines Metallgitters (10) parallel zur Anlagefläche (4) von der Aufnahmeeinrichtung (8) aufnehmbar ist.Wood-concrete connector (1) with a body (2) having a contact surface (4) for placing on a substrate (23) made of wood and a screw receptacle (15) such that a screw (18), with the Body (2) on the substrate (23) is festschraubbar, with its screw longitudinal axis (S) at an angle of 20 to 80 degrees, in particular from 30 to 60 degrees and preferably from 40 to 50 degrees, to the contact surface (4) from the body (2 ), characterized in that the body (2) has a receiving device (8) such that a rod (9) of a metal grid (10) parallel to the contact surface (4) of the receiving device (8) is receivable. Holz-Beton-Verbinder nach Anspruch 1, dadurch gekennzeichnet, dass die Aufnahmeeinrichtung (8) nutförmig ist.Wood-concrete connector according to claim 1, characterized in that the receiving device (8) is groove-shaped. Holz-Beton-Verbinder nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schraube (18) eine gedachte Schubebene (ES) definiert, in der die Schraubenlängsachse (S) liegt, wobei die Schubebene (ES) senkrecht zur Anlagefläche (4) steht, und dass die Aufnahmeeinrichtung (8) durch eine Ausnehmung (7) gebildet ist, deren Längserstreckungsrichtung (A) im Wesentlichen parallel zur Anlagefläche (4) und im Wesentlichen parallel zur Schubebene (ES) ist.Wood-concrete connector according to claim 1 or 2, characterized in that the screw (18) defines an imaginary thrust plane (ES), in which the screw longitudinal axis (S) is, wherein the thrust plane (ES) is perpendicular to the contact surface (4) in that the receiving device (8) is formed by a recess (7) whose longitudinal direction (A) is substantially parallel to the abutment surface (4) and substantially parallel to the abutment plane (ES). Holz-Beton-Verbinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein spitzer Vorsprung (19) von der Anlagefläche (4) weg ragt.Wood-concrete connector according to one of the preceding claims, characterized in that a pointed projection (19) protrudes away from the contact surface (4). Holz-Beton-Verbinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Körper (2) eine zur Anlagefläche (4) im Wesentlichen parallele Schlagfläche (6) zur Aufnahme von Schlägen eines Hammers aufweistWood-concrete connector according to one of the preceding claims, characterized in that the body (2) has a striking surface (6) substantially parallel to the abutment surface (4) for receiving impacts of a hammer Holz-Beton-Verbinder nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Körper (2) von einer der Anlagefläche (4) abgewandten Seite aus gesehen an einer Außenseite (28) eine Hinterschneidung (14, 26) aufweist.Wood-concrete connector according to one of the preceding claims, characterized in that the body (2) of one of the contact surface (4) facing away from an outer side (28) has an undercut (14, 26). Befestigungsanordnung (22) mit einem Holz-Beton-Verbinder (1) nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass der Holz-Beton-Verbinder (1) mit einer Schraube (18) an einen Untergrund (23) aus Holz geschraubt ist, ein Metallgitter (10) in der Aufnahmeeinrichtung (8) einliegt und der Holz-Beton-Verbinder (1) in einer Schicht aus Beton (25) angeordnet ist.Mounting arrangement (22) with a wood-concrete connector (1) according to one of the preceding claims, characterized in that the wood-concrete connector (1) is screwed with a screw (18) to a base (23) made of wood, a metal grid (10) rests in the receiving device (8) and the wood-concrete connector (1) in a layer of concrete (25) is arranged.
EP17204554.4A 2016-12-20 2017-11-30 Wood concrete connector and fastening assembly Active EP3339528B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016125008.2A DE102016125008A1 (en) 2016-12-20 2016-12-20 Wood-concrete connector and mounting arrangement

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DE (1) DE102016125008A1 (en)

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Publication number Priority date Publication date Assignee Title
EP4339388A1 (en) * 2022-09-16 2024-03-20 Hans-Ulrich Terkl Screw holder and method for detachably fastening a concrete element to a support structure

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DE102016125008A1 (en) 2018-06-21

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