Connection device

Abstract

The invention relates to a connection device (1) for the preferably transversely force-locking connection of concrete components, in particular concrete precast elements, comprising an elongate storage box (10) for access to the component end side, which storage box has a base (12) and at least two side walls (14, 16) extending in the longitudinal direction of the base, at least one flexible reinforcement ring element (2) which can be accommodated in the storage box (10) and can be deflected out of the storage box, the base (12) defining at least one through-opening (20) with an edge (22), through which the reinforcement ring element (2) extends, characterized in that the reinforcement ring element (2) engages at least two engagement points (22a, 22b) of the edge, at least one first engagement point (22a) having a greater distance from the extension plane of the base (12) than at least one second engagement point (22b).

Description

TECHNICAL FIELD

[0001] The present invention relates to a connection device. BACKGROUND

[0002] In order to establish a load-bearing structure of a building constructed from concrete prefabricated elements, the concrete prefabricated elements must be connected to one another in a force-locked manner. Plate-like wall elements are connected to one another on vertical joints or with vertical pillars. On the end sides of the elements, corresponding pouring channels are provided, on the bottom of which a connection element with a storage box is provided, which contains a turnable-out reinforcing element. The reinforcing element can be made, for example, from reinforcing steel. Such so-called back-bent connection pieces are disclosed, for example, in DE 39 37 275 A1, but have the disadvantage that the back-bending of the reinforcing steel is cumbersome and laborious and requires the provision of large-sized, robust storage boxes.

[0003] In another design variant, the reinforcing element can also be configured as a flexible rope element. Such storage boxes are disclosed, for example, in WO 03 / 008737, EP 0 914 531 A1 or EP 0 534 475 A1. By turning out such a flexible rope element, a loop-shaped element is provided perpendicular to the end side, which overlaps in the joint when the prefabricated elements are assembled. The loops overlapping in the joint are mostly poured in the pouring joint with jointing mortar over the entire height of the prefabricated element. After the jointing mortar has hardened, the pouring joint is able to transmit forces in different directions due to the overlapping connection element, that is to say, on the one hand, tensile forces perpendicular to the joint, that is to say, perpendicular to the end side of the prefabricated element, and, on the other hand, transverse forces perpendicular to the plane of the plate, and, in particular, transverse forces longitudinal to the joint in the direction of the joint. The latter transverse forces are load situations which occur very frequently in building practice.

[0004] In order to more precisely direct the occurring forces into the concrete, it is important that the end of the anchoring side of the flexible reinforcing loop element is arranged at an appropriate angle, for example, 90°, with respect to the bottom of the storage box. For this purpose, a plastic insert is usually provided on the bottom of the storage box, which holds the end of the anchoring side of the flexible reinforcing loop element in the desired orientation. But thereby the structure of the connection device is complicated. Furthermore, there is the risk that the plastic insert is lost, which can lead to an inappropriate orientation of the end of the anchoring side of the flexible reinforcing loop element and, thereby, to a reduced load-bearing capacity. SUMMARY

[0005] It is therefore the object of the present invention to provide a connection device of the type mentioned in the opening paragraph with at least one flexible reinforcing loop element, which has a reliable load-bearing capacity while being simple in structure.

[0006] The object is achieved according to the application by a connection device for transversely force-locked connection of concrete components, comprising an elongate storage box for introduction of a component end side, the storage box having a base and at least two side walls extending in the longitudinal direction of the base, at least one flexible reinforcing ring element, which can be accommodated in the storage box and can be deflected out of the storage box, wherein the base defines at least two through-openings for each reinforcing ring element, each through-opening having an edge, the reinforcing ring element extending through the at least two through-openings, the reinforcing ring element having at least two abutment points which abut the edge, at least one first abutment point having a greater distance from the extension plane of the base than at least one second abutment point, the at least two through-openings each having an extension axis which defines an angle of at most 85° with respect to the extension plane of the base, such that the end of the anchoring side of the reinforcing ring element is arranged perpendicular to the base of the storage box, and the base has at least one protrusion having a section inclined with respect to the base, in which section the at least two through-openings are defined.

[0007] The application is based on the idea of directly configuring the base of the storage box such that the end of the anchoring side of the flexible reinforcing ring element is achieved with the desired orientation. To this end, according to the application the reinforcing ring element abuts at least two abutment points of the edge arranged in the storage box, at least one first abutment point having a greater distance from the extension plane of the base than at least one second abutment point.

[0008] By the design of the base of the storage box according to the application, the orientation of the reinforcing ring element with respect to the base of the storage box can be precisely determined without additional components, holding devices or the like being required for this purpose. This makes it possible to minimize the structure and the number of components of the connection device according to the application while ensuring reliable load-bearing properties.

[0009] According to an improved embodiment of the application, the at least one through-opening has a first extension axis which defines an angle of at most 85°, preferably at most 75°, with respect to the extension plane of the base. In this way it is ensured that in particular the end of the anchoring side protruding from the base of the storage box is essentially at right angles to the base. This arrangement of the end of the anchoring side has proven to be optimal for most load situations and load types.

[0010] Furthermore, according to an embodiment of the application, the bottom has at least one protrusion, which has a section inclined with respect to the bottom, in which section at least one through-hole is defined. This design makes the manufacturing method of the connection device according to the application particularly simple and smooth, in which, for example, the protrusion is first shaped in the bottom with its inclined section and the through-hole is subsequently produced. As a result, no material has to be inclined through the bottom. Instead, the material can be passed vertically in the region of the inclined section, which can generally be achieved significantly more simply than with an inclined through-hole.

[0011] Although the number of through-holes is not limited in the scope of the application, according to an embodiment of the application, for each reinforcing ring element, the bottom defines at least two through-holes, which are preferably arranged in sections inclined with respect to the bottom. As a result, a particularly precise orientation of the reinforcing ring elements is achieved. At the same time, the risk of the reinforcing ring elements slipping is minimized.

[0012] For the simple manufacturability of the connection device according to the application described above, according to an embodiment of the application, it is furthermore provided that the section inclined with respect to the bottom is at least partially formed flat.

[0013] In this case, according to a further embodiment of the application, it is furthermore provided that the edge defining the at least one through-hole and / or the section inclined with respect to the bottom is formed by shaping, in particular by deep drawing. As a result, a very small variety of raw materials can be worked with, and no splicing or joining steps are required in order to form the edge of the through-hole according to the application. In this way, a smooth and simple manufacturing process is achieved.

[0014] Advantageously, the region of the at least one through-hole is also configured as a funnel-shaped opening together with the point of contact of the box bottom. This makes the penetration process of the reinforcing ring easier.

[0015] Furthermore, according to an embodiment of the application, the bottom has a plurality of further protrusions. By means of these protrusions, the embedding of the storage box in the surrounding concrete can be further improved, so that the load capacity of the connection device according to the application can be increased, in particular with regard to lateral force loads.

[0016] It is particularly preferred here that the bottom has a plurality of recesses, which are preferably arranged alternately with the protrusions. By arranging the bottom protrusions and the bottom recesses alternately, a particularly strong overall interlock between the bottom of the storage box and the concrete is achieved, which can be realized with a low manufacturing outlay, in particular with a low degree of deformation, when forming the bottom protrusions and the bottom recesses. The high overall interlock makes it possible for the bottom of the storage box to introduce lateral force loads into the concrete component with low slippage, so that the force transmission by the connecting device can be activated before a significant crack formation occurs in the concrete. Furthermore, the lateral forces are introduced into the concrete component by the storage box at a location at which the concrete component is not weakened by the joint. In this way, the risk of a typically severe breakage of the component side in the joint region is minimized.

[0017] This design of the bottom of the storage box also advantageously influences the force transmission within the joint itself, that is to say between the cast mortar, the flexible reinforcement ring element and the storage box. In this region, the load behavior is imagined to be reflected by a model of a lever mechanism with tensile and compressive levers (although the invention is not limited to this model arrangement). When acted upon by a lateral force parallel to the joint and transmitted by the cast joint, a compressive lever is formed which is inclined out of the bottom of the storage box and the side wall and which is supported on the respectively opposite storage boxes. This support of the inclined compressive lever, which is important for the load behavior, is significantly improved by the design of the bottom of the storage box with alternating protrusions and recesses. At the same time, the flexible reinforcement ring element also ensures that the pushing forces generated by the inclined compressive lever, which tend to expand the joint, are borne and transmitted.

[0018] Furthermore, according to an improvement of the invention, it is provided that a restraint means for restraining the reinforcement ring element inside the storage box is arranged on the inner surfaces of the side walls facing one another, which restraint means is preferably point-like or rib-like. Thereby, a particularly simple manufacturability of the storage box is also achieved, since, for example, the inward turning of the free edges of the storage box as restraint means for the loop of the reinforcement ring element is no longer necessary. Rather, the point-like or rib-like restraint means can be introduced by simply shaping the side walls. The material requirement is also reduced, while a sufficiently reliable restraint of the reinforcement ring element inside the storage box is also achieved.

[0019] Furthermore, according to an improvement of the invention, it is provided that the connecting device has exactly one reinforcement ring element or has a plurality of reinforcement ring elements. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A perspective view of a connecting device according to the invention is schematically shown, which connecting device here exemplarily has exactly two reinforcement rings; one or more reinforcement rings can also be provided.

[0021] Figure 2 schematically shows a detail of a connection device according to the application in the region of a through-hole; Figure 1 schematically shows a lateral sectional view of the connection device shown in

[0022] Figure 3 schematically shows a detail of a connection device according to the application in the region of a through-hole;

[0023] Figure 4 schematically shows a detail of a connection device according to the application in the region of a through-hole;

[0024] Figure 5 schematically shows a detail of a connection device according to the application in the region of a through-hole; DETAILED DESCRIPTION

[0025] The preferred embodiments of the application are explained in detail below with reference to the drawings.

[0026] Figure 1 A perspective view of a connection device 1 is shown schematically as a first embodiment of the application. The connection device 1 serves for transversely force-locked connection of concrete components, in particular concrete precast elements.

[0027] The connection device 1 comprises an elongate storage box 10, which is for example made of sheet metal and is intended for casting into the end side of a concrete component. The storage box 10 has a bottom 12 and two side walls 14, 16 which extend in the longitudinal direction of the bottom. The bottom has through-holes 20 through which flexible reinforcement ring elements 2 extend respectively, so that the ring sections 6 lie in the region of the side walls 14, 16, while the end portions 4 of the anchoring sides on the opposite sides are each provided with a press sleeve which connects the free ends of the reinforcement ring elements 2 to one another and facilitates better anchoring in the concrete.

[0028] The flexible reinforcement ring elements 2 can for example be a cord formed of wire or twisted wire, which due to its flexibility can be accommodated between the side walls 14, 16 in the storage box 10 and can be deflected out of this. Here, Figure 1 A folded state of the flexible reinforcement ring elements 2 is shown.

[0029] Figure 1 The storage box 10 is shown on the left-hand side with a flange 25 which is bent by the storage box to the outside of the storage box, mostly interrupted. In Figure 1 The right-hand side flange 25 is shown completely continuously bent inwards in

[0030] Only one or a further flange variant is preferably pressed out on the storage box. A variant with alternating flange bending structures inwards and outwards is preferably used.

[0031] In the region of the flange 25, a semicircular recess 26 is provided for the fastening, into which the reinforcing ring element 2 is clipped in the turned-out state and is fastened in its position perpendicular to the storage box 10.

[0032] In the region of the flange 25, an inwardly curved region 27 is provided, which serves as a further curved fitting element for the bending of the elastic reinforcing ring element 2.

[0033] Alternatively, the element 27 can be dispensed with, and instead of this element, the elements 8 are pressed into or out of the side of the storage box in order to restrain the reinforcing ring here. However, these elements can also be used in combination in order to optimally design the ring-shaped restraint.

[0034] A third fitting point is in the laterally inwardly pressed-in plate structure. This fitting point can also be produced by means of an object, such as a pin, which passes through a hole in the side of the storage box, or with a tab which is inserted through a slit. This fitting point can also be integrated into the lateral flange as the element 27 or the fitting point can be a component of the total flange 25, as is shown in the embodiment in Figure 2 .

[0035] The outer shape of the through-hole 20 can be best seen in Figure 2 , which shows a lateral sectional view of the embodiment shown in Figure 1 . It is shown in Figure 2 that the through-hole 20 is defined by a surrounding edge 22, here the reinforcing ring element 2 in the present embodiment fits two different fitting points 22a and 22b of the edge 22. Here, the first fitting point 22a has a greater distance from the extension plane of the bottom 12 than the second fitting point 22b. By this design, the reinforcing ring element 2 is purposefully diverted so that it assumes a predetermined orientation with respect to the bottom. In this way, the angle of the anchoring side of the reinforcing ring element 2 with respect to the bottom 12 is for example 90° or for example in the range of 80° to 100°.

[0036] In order to bend the reinforcing ring element 2, the fitting points 22a and 22b are thus present at a defined distance or lever arm therebetween. The third fitting point is spaced apart therefrom so that the three elements can hold the elastic reinforcing element bent.

[0037] Advantageously, the region of the through-hole is also configured funnel-shaped 20 together with the fitting points 22a and 22b in the bottom 12 of the box. This makes the threading-in process of the reinforcing ring element 2 composed of a wire rope easier.

[0038] Furthermore, the edge 22 in the region of the through-hole 20 is configured in the form of a tube segment and thereby has an extension axis 24 which defines an angle a of at most 85°, preferably at most 75°, with respect to the extension plane of the bottom. The orientation of the end 4 of the anchoring side of the reinforcing ring element is thereby set particularly reliably approximately perpendicular to the bottom 12 of the bin.

[0039] Furthermore, in Figure 2 It can be seen that a restraining mechanism 8 for restraining the reinforcing ring element 2 is provided in the interior of the storage bin 10 by the illustrated side wall 14, which in the present case is configured punctiformly. However, alternatively or additionally, other forms of the restraining mechanism 8 can also be provided, for example, rib-like.

[0040] In Figure 3 Another embodiment of the connection device according to the application is illustrated schematically in detail in The basic idea of this embodiment is that the protrusion 18 is first shaped (auszuformen) together with its inclined section 18a with respect to the bottom by a suitable manufacturing method, such as molding, in order to subsequently shape the through-hole 20, which here can be formed, for example, perpendicular to the inclined section 18a with respect to the bottom. It is thereby not necessary to realize the through-hole inclined with respect to the surrounding material, so that the manufacturing method can be simplified. It is particularly advantageous here that the inclined section 18a with respect to the bottom is designed at least partially flat, so that the through-hole 20 does not have to be introduced into a curved material. In the region of the through-hole 20, mainly an arrangement system is illustrated which results in a funnel-shaped entry of the through-hole on one side. This makes it easy for an elastic reinforcing ring element in the form of a truncated metal wire rope, for example, to be threaded in.

[0041] However, it is also possible within the scope of the application to insert an inclined, tube segment-like section into the bottom 12 of the storage bin 10 in order to shape the through-hole 20 with the corresponding edge 22. A corresponding embodiment is illustrated schematically in detail in Figure 4 .

[0042] Figure 4 It is also shown that the bottom can have a further protrusion 30, or as illustrated in Figure 5 , a plurality of further protrusions 30. Alternatively or additionally, the bottom 12 can also have a plurality of recesses 32, which are likewise illustrated in Figure 5 . It is advantageous here for the protrusions 30 and the recesses 32 to be arranged alternately in general, in order to optimize the load-bearing capacity of the connection device according to the application, in particular with respect to transverse force loads.

[0043] In Figure 4 and Figure 5Here, for example, in one possible embodiment in which the recesses 28 or protrusions are circular, the storage box is also shown laterally, these recesses or protrusions ensuring better containment in the concrete on the side walls of the storage box. These recesses or protrusions prevent possible detachment from the surrounding concrete when the reinforcing ring element 2 is turned out of the storage box.

[0044] Finally, it is pointed out that the number of reinforcing ring elements 2 is not limited in the scope of the present application and that, according to the application occasion, it is also possible to use a connection device with a single reinforcing ring element 2.

Claims

1. A connection device (1) for transversely force-lockingly connecting concrete components, comprising: an elongate storage box (10) for introducing a component end side, having a base (12) and at least two side walls (14, 16) extending in the longitudinal direction of the base, at least one flexible reinforcement ring element (2) which can be accommodated in the storage box (10) and can be deflected out of the storage box, wherein the base (12) defines at least two through-openings (20) for each reinforcement ring element (2), each having an edge (22), through which the reinforcement ring element (2) extends, characterized in that the reinforcement ring element (2) has at least two abutment points (22a, 22b) to the edge, at least one first abutment point (22a) having a greater distance from the extension plane of the base (12) than at least one second abutment point (22b), the at least two through-openings (20) each have an extension axis (24) which defines an angle (a) of at most 85° with respect to the extension plane of the base (12), such that the end (4) of the anchoring side of the reinforcement ring element (2) is arranged perpendicular to the base (12) of the storage box (10), and the base (12) has at least one protrusion (18) having a section (18a) inclined with respect to the base, in which the at least two through-openings (20) are defined. The extension axis defines an angle (a) of at most 75° with respect to the extension plane of the base (12). The section (18a) inclined with respect to the base is at least partially flat-shaped. The edges (22) defining the at least two through-openings (20) and / or the section (18a) inclined with respect to the base are formed by profiling. The area of the at least two through-openings (20) is formed by deep-drawing for a funnel-shaped passage and passage opening (20) of a reinforcement ring element (2) composed of a wire rope. The base (12) has a plurality of further protrusions (30) and / or recesses (32). The recesses (32) are arranged alternately with the further protrusions (30). On the inner surfaces of the side walls (14, 16) facing each other, a restraint means (8) is respectively provided for restraining the reinforcement ring element (2) inside the storage box (10), which is formed point-like or rib-like or as a complete or partial flange area on the edge of the storage box (10) or by an additional inserted holding element in the storage box.

2. The connection device according to claim 1, characterized in that The connection device has exactly one reinforcement ring element (2) or a plurality of reinforcement ring elements (2).

3. The connection device according to claim 1 or 2, characterized in that The storage box has protrusions or recesses on the side walls (14, 16) as restraining structures in the surrounding concrete when the reinforcement ring element (2) is flipped out.

4. The connection device according to claim 1 or 2, characterized in that The concrete component is a concrete precast element.

5. The connection device according to claim 1 or 2, characterized in that ​ 6. The connection device according to claim 1 or 2, characterized in that ​ 7. The connection device according to claim 6, characterized in that ​ 8. The connection device according to claim 1 or 2, characterized in that ​ 9. The connection device according to claim 1 or 2, characterized in that ​ 10. The connection device according to claim 1 or 2, characterized in that ​ 11. The connection device of claim 1, wherein ​ 12. The connection device according to claim 1 or 2, characterized in that The edges (22) delimiting the at least two through holes (20) and / or the sections (18a) inclined with respect to the base are constituted by deep drawing.

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