Reinforcement and connecting element therefor

Abstract

The application relates to a connecting element (3) for permanently connecting one end (4) of a first reinforcing bar (2) of a concrete reinforcement (1) to one end (4) of a second reinforcing bar (2) of the concrete reinforcement (1). The connecting element (3) has a continuous opening (5) with a first opening section (6) and a second opening section (6) adjacent to the first opening section (6). The end (4) of the first reinforcing bar (2) can be positioned in the first opening section (6) and the end (4) of the second reinforcing bar (2) in the second opening section (6). In the connecting element (3) a first and a second fastening means (7) are arranged, wherein the end (4) of the first reinforcing bar (2) can be fastened to the first fastening means (7) in the first opening section (6) and the end (4) of the second reinforcing bar (2) can be fastened to the second fastening means (7) in the second opening section (6).A slip-reducing means (13) is provided, which reduces the slippage of the first reinforcing bar (2) and / or the second reinforcing bar (2) within the opening (5).

Description

FIELD OF THE INVENTION

[0001] The invention relates to a connecting element according to the preamble of claim 1. The connecting element serves to firmly connect one end of a first reinforcing bar of a concrete reinforcement to one end of a second reinforcing bar of the concrete reinforcement. The connecting element has a through-opening with a first opening section and a second opening section adjacent to the first opening section. One end of the first reinforcing bar is pushed into the opening from one side, and one end of the second reinforcing bar is pushed into the opening from the other side. Where the opening sections adjoin one another, the ends of the reinforcing bars can touch within the opening of the connecting element, or they can be arranged adjacent to one another with preferably a small gap in the opening.The end of the first reinforcing bar can therefore be arranged in the first opening section and the end of the second reinforcing bar in the second opening section.

[0002] A first and a second fastening element are also arranged in the connecting element. The end of the first reinforcing bar can be fastened in the first opening section with the first fastening element, and the end of the second reinforcing bar can be fastened in the second opening section with the second fastening element. Connecting elements of this type are used in construction where reinforcement is to be assembled from several reinforcing bars, for example, in concrete wall or concrete ceiling structures.

[0003] The invention also relates to a reinforcing bar according to the preamble of claim 10. The reinforcing bar can, for example, be formed as a round reinforcing bar, i.e., it can have a round (or oval) cross-section. The (round) reinforcing bar is intended for concrete reinforcement, wherein the (round) reinforcing bar can be connected to another (round) reinforcing bar.

[0004] The invention also relates to a concrete reinforcement according to the preamble of claim 11. Accordingly, the concrete reinforcement comprises a rod-like, in particular round-like, reinforcement element which is formed from a first and a second reinforcing (round) bar, in particular described and claimed herein.

[0005] According to claim 12, the invention further relates to a use of a conical head screw as a slip-reducing means in a connecting element, particularly described and claimed herein, for connecting two ends of two reinforcing bars.

[0006] Finally, according to the preamble of claim 13 and claim 14, the invention relates to a method for reducing slippage in interconnected reinforcing bars or in a concrete reinforcement with reinforcing bars. TECHNOLOGICAL BACKGROUND

[0007] In large-scale concrete structures, multi-part reinforcement arrangements are regularly used, with the reinforcement components being connected to one another using connecting elements. Connection couplers, for example, are used as connecting elements. The requirements for these connecting elements can be technically demanding in that the interconnected components within the connecting element must exhibit no or minimal slippage. Measuring this slippage is therefore part of the approval tests for coupler systems and similar connection systems. PRESENTATION OF THE INVENTION

[0008] Against this background, the problem to be solved is to improve the connection of reinforcing bars with a view to minimizing slippage of the reinforcing bars within the connecting element. This problem is solved by a connecting element according to claim 1. Preferred embodiments are the subject of the dependent and secondary claims. Accordingly, the connecting element according to claim 1 provides a slip-reducing means, with which slippage of the first reinforcing bar and / or the second reinforcing bar within the opening of the connecting element can be reduced. The slip-reducing means can expediently be actuated outside the opening of the connecting element, with the slip-reducing effect occurring within the opening.

[0009] It may be expedient for the slip-reducing means to comprise at least one slip-reducing screw or to be formed as a slip-reducing screw or slip-reducing screws. The slip-reducing screw can be rotatably arranged in a thread in the connecting element. The axis of symmetry of the thread for the slip-reducing screw can run perpendicular to the axis of symmetry of the opening.

[0010] According to a preferred embodiment, the slip-reducing screw comprises a conical head or a round, in particular semicircular, head, which can be pressed against at least one end face and / or against at least one edge of at least one end of a reinforcing bar, or against both end faces or both edges of the ends of both reinforcing bars, by turning the slip-reducing screw. The slip-reducing screw can be designed as a hexagon screw with a conical head or a round head. By pressing the slip-reducing screw against the reinforcing bar(s), a force is exerted on the bars, thereby improving the fit of the bars in the opening of the connecting element in that the bars are less movable due to the force applied and thus have little or no slippage when static or dynamic forces are introduced into the reinforcement from the outside.The screw can, for example, be formed as a grub screw or have the shape / form of a grub screw.

[0011] By preferably arranging the slip-reducing means between the first and second fastening means, particularly where the first and second opening sections adjoin one another, the force generated by the slip-reducing means—for example, by tightening the slip-reducing screw—is transmitted evenly to both reinforcing bars in the opening of the connecting element. The transmission occurs in such a way that a force is introduced into the connecting element perpendicular to the axis of symmetry of the opening, which is translated—for example, via a curve or a conical surface—into at least one force whose direction runs parallel to the axis of symmetry of the opening and the bars.

[0012] The first and / or second fastening means may comprise at least one fastening screw, wherein the / each fastening screw may be rotatably arranged in a thread in the connecting element. Preferably, the first and second fastening means each comprise a plurality of fastening screws, wherein all fastening screws in the connecting element may be arranged in a line parallel to the axis of symmetry of the opening.

[0013] At least one fastening screw can have a conical head or a round, particularly semicircular, head. The head can be pressed onto the outer surface of the reinforcing bar end by turning the fastening screw. The fastening screws can be designed as grub screws. Screws with a flat head can also be used. Hexagon screws with a conical head are preferred. These are tightened until the hexagonal section breaks off. This creates a tight connection between the reinforcing bar and the connecting element.The combination of several hexagon fastening screws with a conical head (or with a round head) in the area of ​​the first and second opening section and a slip-reducing (hexagon) screw with a conical head or round head between the first and second opening section ensures that the reinforcing bars are seated in the opening of the connecting element in a stable and low-slip or slip-free manner.

[0014] In practice, the connection between the two reinforcing bars is realized as follows: First, the fastening screws are loosened so that the reinforcing bars can be arranged in the opening. The slip-reducing screw is screwed into the thread far enough that the edges of both reinforcing bar ends abut the conical head (or the round head). The fastening screws are then tightened firmly, possibly so tightly that the hexagonal section of the screw breaks off. This ensures that the bars fit firmly in the opening sections of the connecting element. Finally, the slip-reducing screw is also tightened firmly. This ensures that the bars are not only firm and stable, but also sit in the opening sections of the connecting element with little or no play or slippage.

[0015] The connecting element and its components are preferably formed from at least one metal or at least one metal alloy. For example, a construction beam whose properties are a particularly good match for those of concrete can be used for this purpose. It can be expedient if the connecting element is designed as a connecting coupling or sleeve, in particular one with a hollow cylinder shape. The opening with the two opening sections is located in the center of the sleeve, and the fastening screws and the slip-reducing screws are arranged in threaded bores that extend from the jacket of the sleeve to the opening in the sleeve and are arranged essentially perpendicular to the axis of symmetry of the hollow cylinder-like connecting sleeve.

[0016] An improvement in the connection of reinforcing bars is also achieved with a reinforcing bar according to claim 10. The reinforcing bar can be formed, for example, as a round reinforcing bar. The reinforcing bar is intended for concrete reinforcement, wherein the reinforcing bar can be connected to another reinforcing bar. A connecting element described and claimed herein is arranged at at least one end of the reinforcing bar.

[0017] An improvement in the connection of reinforcing bars is also achieved with a concrete reinforcement according to claim 11. The first and the second reinforcing bar of the concrete reinforcement are accordingly firmly connected to one another with a connecting element described and claimed herein, in particular arranged linearly to one another or in alignment.

[0018] An improvement in the connection of reinforcing bars is also achieved by using a conical head screw according to claim 12. The conical head screw is accordingly used as a slip-reducing means in a connecting element for connecting two ends of two reinforcing bars, in particular of a connecting element described and claimed herein.

[0019] According to claim 13, an improvement in the connection of reinforcing bars is also achieved with a method for reducing slippage of a first reinforcing bar connected to a second reinforcing bar, in particular with a reinforcing bar described and claimed herein. When connecting the first reinforcing bar to the second reinforcing bar, a slippage-reducing means of a connecting element for connecting the reinforcing bars, in particular described and claimed herein, is activated.

[0020] According to claim 14, a method for reducing slippage in concrete reinforcement also improves the connection of reinforcing bars. The concrete reinforcement comprises a rod-like, in particular round-like, reinforcement element formed from a first and a second reinforcing bar, in particular a reinforcing bar as described and claimed herein. When connecting the first reinforcing bar to the second reinforcing bar, a slip-reducing means of a connecting element for connecting the reinforcing bars, as described and claimed herein, is activated.

[0021] The aforementioned components to be used according to the invention, as well as those claimed and described in the exemplary embodiments, are not subject to any special exceptional conditions in terms of their size, shape, material selection and technical conception, so that the selection criteria known in the field of application can be applied without restriction.

[0022] Further details, features, and advantages of the subject matter of the invention emerge from the dependent claims, as well as from the following description and the accompanying drawing, which illustrates, by way of example, an embodiment of a connection between two reinforcing bars. Individual features of the claims or embodiments can also be combined with other features of other claims and embodiments. BRIEF DESCRIPTION OF THE CHARACTERS

[0023] In the drawing show Fig. 1a concrete reinforcement in perspective view, Fig. 2a concrete reinforcement according to Fig. 1 in lateral sectional view, Fig. 3 a concrete movement according to the Figuren 1 and 2 in cross-sectional view and Fig. 4 a slip-reducing agent in detailed view. DETAILED DESCRIPTION OF EMBODIMENTS

[0024] A concrete reinforcement 1 with two interconnected reinforcing bars 2 is in Fig. 1 shown. The reinforcing bars 2 are arranged in a line and connected to one another with a connecting element 3. The reinforcing bars 2 are formed as round bars with a round cross-section. The connecting element 3 is formed as a hollow cylindrical coupling or sleeve. One end 4 of the first reinforcing bar 2 is inserted into the right side of the opening 5 of the sleeve 3 and one end 4 of the second reinforcing bar 2 is inserted into the left opening 5 of the sleeve 3. The opening 5 is continuous: the end 4 of the first bar 2 is arranged in the first opening section 6 of the opening 5 and the end 4 of the second bar 2 is arranged in the second opening section 6. The two opening sections 6 border one another directly at approximately the middle of the sleeve 3 or merge into one another there.

[0025] Each end 4 of the two reinforcement bars 2 is fixed in the socket 3 with several fastening screws 7, so that the bar 2 is firmly arranged in the socket 3. The number of fastening screws 7 may depend on the diameter of the socket 3. According to Fig. 1 For example, six fastening screws 7 are provided per opening section 6. The screws 7 are formed as hexagon screws with a conical head 8. A side view of the sleeve 3 with the fastening screws 7 arranged in the threaded holes 9 (a total of 12) shows the Fig. 2 . When fastening the rods 2, the screws 7 are tightened so tightly that the hexagon section 10 breaks off. The position of the rods 2 within the opening 5 after tightening the fastening screws 7 is shown in the cross-sectional view according to Fig. 3 By tightening the fastening screws 7, forces are transferred from the fastening screws 7 to the bar ends 4, which are directed perpendicular to the axis of symmetry of the bars 2 (orthogonal forces, according to the Figuren 2 and 3 vertically downwards, with the axis of symmetry of the bars 2 according to Fig. 2 horizontally oriented). In Fig. 3 It can be seen that a gap 12 or some play remains between the rods 2 and the inner wall 11 of the opening 5, which can lead to the rods 2 not being able to move even after tightening the screws arranged perpendicular to the plane of the drawing. Fig. 3 fastening screws 7 arranged in a flush alignment and when the bars 2 are subjected to external loading, for example during or after concreting, there may be some slippage in the socket 3.

[0026] To prevent or reduce this potential slippage, a slip-reducing means 13 of the connecting element 3 is arranged in the region of the opening 5, where the first and second opening sections 6 adjoin one another. The slip-reducing means 13 is formed as a hexagon screw with a conical head 8. Fig. 4shows a detailed view of the slip-reducing screw 13: The edges 14 of the ends 4 of the reinforcing bars 2, which are arranged in the opening 5 of the connecting element 3, are in contact with the conical head 8 of the slip-reducing screw 13 after the bars 2 have been fastened with the fastening screws 7. By tightening the screw 13 with a tool (wrench, torque wrench, or similar), the slip-reducing screw 13 penetrates into the opening 5 and, with the conical surface 15 of the conical head 8, transfers an orthogonal force formed when the screw 13 is turned to the reinforcing bars 2 in such a way that they feel an additional force which is directed, among other things, parallel to the axis of symmetry of the bars 2. Due to the effects of the orthogonal forces of the fastening screws 7 and the additional forces from the slip-reducing screw 13, the rods 2 have no or very little slip in the opening 5 of the connecting sleeve 3. LIST OF REFERENCE SYMBOLS

[0027] 1Concrete reinforcement 2Reinforcing bar 3Connecting element / socket 4End 5Opening 6Opening section 7Fastening screw 8Conical head 9Threaded hole 10Hexagonal section 11Inner wall 12Gap 13Slip-reducing agent 14Edge 15Conical surface

Claims

1. A connecting element (3) for firmly connecting one end (4) of a first reinforcing bar (2) of a concrete reinforcement (1) to one end (4) of a second reinforcing bar (2) of the concrete reinforcement (1), wherein the connecting element (3) has a through-opening (5) with a first opening section (6) and a second opening section (6) adjacent to the first opening section (6), wherein the end (4) of the first reinforcing bar (2) can be arranged in the first opening section (6) and the end (4) of the second reinforcing bar (2) in the second opening section (6), wherein a first and a second fastening means (7) are arranged in the connecting element (3), wherein the end (4) of the first reinforcing bar (2) can be fastened to the first fastening means (7) in the first opening section (6) and the end (4) of the second reinforcing bar (2) can be fastened to the second fastening means (7) in the second opening section (6) can be fastened, characterized in thata slip-reducing means (13) is provided, with which slip of the first reinforcing bar (2) and / or the second reinforcing bar (2) within the opening (5) can be reduced.

2. Connecting element (3) according to claim 1, characterized in that the slip-reducing means (13) comprises at least one slip-reducing screw or is formed as a slip-reducing screw (13) or slip-reducing screws, wherein the slip-reducing screw (13) is rotatably arranged in a thread (9) in the connecting element (3).

3. Connecting element (3) according to claim 2, characterized in thatthe slip-reducing screw (13) comprises a conical head (8) or a round, in particular semi-circular, head, which can be pressed against at least one end face and / or against at least one edge (14) of at least one end (4) of a reinforcing bar (2) or against both end faces or both edges (14) of the ends (4) of both reinforcing bars (2) by turning the slip-reducing screw (13).

4. Connecting element (3) according to one of claims 1 to 3, characterized in that the slip-reducing means (13) is arranged between the first and the second fastening means (7), in particular where the first and second opening sections (6) adjoin one another.

5. Connecting element (3) according to one of claims 1 to 4, characterized in that the first and / or the second fastening means (7) comprises at least one fastening screw (7), wherein the / each fastening screw (7) is rotatably arranged in a thread in the connecting element (3).

6. Connecting element (3) according to claim 5, characterized in that the first and the second fastening means (7) each comprise a plurality of fastening screws (7), and that all fastening screws (7) in the connecting element (3) are arranged in an alignment running parallel to the axis of symmetry of the opening (5).

7. Connecting element (3) according to claim 5 or 6, characterized in that at least one fastening screw (7) comprises a conical head (8) or a round, in particular semi-circular, head, wherein the head can be pressed onto the lateral surface of the reinforcing bar end (4) by turning the fastening screw (7).

8. Connecting element (3) according to one of claims 1 to 7, characterized in that the connecting element (3) and its components are formed from at least one metal or at least one metal alloy.

9. Connecting element (3) according to one of claims 1 to 8, characterized in thatthe connecting element (3) is formed as a connecting coupling, in particular in the shape of a hollow cylinder.

10. Reinforcing bar (2), in particular round reinforcing bar, for a concrete reinforcement (1), wherein the reinforcing bar (2) can be connected to another reinforcing bar, characterized in that a connecting element (3) according to one of claims 1 to 9 is arranged at at least one end (4) of the reinforcing bar (2).

11. Concrete reinforcement (1) comprising a rod-like, in particular round-rod-like, reinforcement element which is formed from a first and a second reinforcement bar (2), in particular with a reinforcement bar (2) according to claim 10, characterized in that the first and the second reinforcing bar (2) are firmly connected to one another, in particular linearly connected to one another, by a connecting element (3) according to one of claims 1 to 9.

12. Use of a conical head screw as a slip-reducing means (13) in a connecting element (3) for connecting two ends (4) of two reinforcing bars (2), in particular a connecting element (3) according to one of claims 1 to 9.

13. A method for reducing slippage of a first reinforcing bar connected to a second reinforcing bar, in particular with a reinforcing bar according to claim 10, characterized in that when connecting the first reinforcing bar to the second reinforcing bar, a slip-reducing means of a connecting element for connecting the reinforcing bars is actuated, in particular a slip-reducing means of a connecting element according to one of claims 1 to 9.

14. A method for reducing slippage of a concrete reinforcement comprising a rod-like, in particular round-like, reinforcement element formed from a first and a second reinforcement bar, in particular with a reinforcement bar according to claim 10, characterized in that when connecting the first reinforcing bar to the second reinforcing bar, a slip-reducing means of a connecting element for connecting the reinforcing bars is actuated, in particular a slip-reducing means of a connecting element according to one of claims 1 to 9.

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