WO2013131530A1

WO2013131530A1 - Turnbuckle for connecting structural elements

Info

Publication number: WO2013131530A1
Application number: PCT/EP2012/001037
Authority: WO
Inventors: Klaus Jaeschke
Original assignee: B.T. Innovation Gmbh
Priority date: 2012-03-08
Filing date: 2012-03-08
Publication date: 2013-09-12
Also published as: JP2015510062A; EP2823110A1; MX2014010725A; IN2014DN07779A; AU2012372530A1; NI201400103A; EA201491502A1; CN104271852A

Abstract

The invention relates to a turnbuckle (1) for connecting structural elements, particularly precast concrete parts (10), which is formed substantially in a shell shape, and a receiving chamber (2) accessible at least from the outside by means of an access opening (9) and also has passage sections (3, 4), preferably facing each other, opening into the receiving chamber, said passage sections being preferably designed as passage openings for the insertion of fastening means (13). The present invention also relates to a construction kit for connecting structural elements, a method for connecting structural elements, an arrangement for connecting structural elements and a method for preparing structural elements.

Description

Turnbuckle for connecting components

The present invention relates to a turnbuckle for connecting components, a kit for connecting components with a turnbuckle according to the invention, a method for connecting components with a turnbuckle invention, an arrangement for connecting components and a method for preparing components, in the turnbuckle invention is used.

In the construction of new buildings often precast concrete parts are used, which are connected to each other on the site. There are high demands on the connection. The connection should be fast and inexpensive to build and can withstand high loads.

So far, boxes with reinforcing elements have been arranged in Vergussnuten the components. These reinforcing elements may e.g. consist of reinforcing steel. When composing the components overlap the reinforcing elements. These overlapping reinforcement elements are grouted in the grout with grout.

However, this method is time-consuming, since it takes some time until the grout has hardened and the bond is loadable.

In order to build new buildings quickly, it is necessary that the components can be connected quickly and safely on the construction site.

When constructing temporary structures, economic demolition is also important. Preferably in the context of flood protection, it does not make sense for cost reasons, the protective measures throughout the year to build, creating a cost-effective alternative is needed.

Additional boundary conditions result from the safety requirements for the building to be constructed. In areas near the coast, resistance to salt water is a criterion. As a result, the structures can be chemically attacked over the period of their existence and thus weakened.

For use in tectonically active areas, structures must be designed for earthquakes. Here, vibrations of the earth's surface must be safely endured or compensated. In the construction of permanent buildings maintenance and repair are of great importance. If necessary, the connections must be checked at regular intervals. Here, the critical connection points should always have easy access to ensure cost-effective verifiability.

The object of the invention is to simplify the connection of components. Another object is to enable the use in buildings in tectonically active areas, whereby a vibration resistance is required. An additional task is to allow a simple and time-saving disassembly. At the same time, the cost of resources should be reduced. Another object of the invention is to allow a simple check of the quality and safety of the connection of the precast concrete parts.

The object is achieved by a turnbuckle for connecting components, in particular precast concrete parts, which is substantially cup-shaped and accessible at least from the outside via an access opening receiving space and additionally preferably opposite each other, opening into the receiving passage sections, preferably as passages in the flat side walls are designed, having for passing insertion of fastening means, and that the clamping lock has preferably a tensile strength of 400 N / mm ² to 800N / mm ^2, preferably 450 N / mm ² to 780 N / mm ^2, particularly preferably from 500 N / mm ² to 750 N / mm ² .

This solution has the advantage that components, especially precast concrete parts, can be quickly, efficiently and safely connected to each other. The connection can be loaded immediately after tension of the turnbuckle. A curing time is not necessary. Thus, the turnbuckle invention greatly simplifies the assembly of concrete elements and leads to a significant time savings on the site. In addition, the turnbuckle invention can be manufactured efficiently and in series in high precision.

By using a material that has high strength and toughness, the compound can absorb and transmit high forces. Especially when used for structures in seismic areas and the associated vibration requirements, it is necessary to cushion these occurring vibrations and compensate. By using a high-strength material, preferably a special steel, the safety of the structure is ensured, so that the steel endures a high deformation before a component failure occurs. By using preferably stainless steel or preferably acid-resistant steel, the corrosion resistance of the turnbuckle can be increased, so that use in a saltwater environment is possible. The use of composite materials can also provide increased corrosion resistance, so the turnbuckle for flood protection structures or offshore buildings can be used. It is therefore advantageous in this context that a backfilling of the mounting opening for corrosion protection of the turnbuckle is not necessary, which reduces costs and assembly costs.

It may be advantageous if the turnbuckle has at least two tapered, preferably tapered side walls. This has the advantage that the necessary space for the rotational movement of a clamping tool is given in the creation of screw and a higher mechanical strength is achieved by the special geometric shape of the turnbuckle.

If at least two side walls are substantially planar and face each other, preferably in parallel, there is a straight-line load transfer in the pulling direction.

Furthermore, it may be advantageous if the passage sections are formed in the planar side walls, since in this way the assembly can be further simplified.

In addition, it may be advantageous if the tapered side walls are connected to each other, so that the cross section is V- or U-shaped. In this way, the onset of a clamping tool in the creation of screw with the components can be further simplified.

In an advantageous further development of the invention, the passage sections may preferably be offset by 90 °, and be formed as a slot and / or slot, and preferably one of the passage sections may be formed as a slot and another of the passage sections as a slot. This design allows an even easier and faster installation of the turnbuckle and compensates in the assembly process in the manufacture of components resulting tolerances of the attachment points.

If the slot is open at least on one side and preferably opens into the access opening, the assembly can be further simplified.

It may also prove advantageous if the turnbuckle at least partially consists of a malleable cast iron or a nodular cast iron. In the case of malleable cast iron, the strength and the hardness of the turnbuckle can advantageously be optimized. adapted to the installation situation. Malleable cast iron allows a good adjustability of toughness and hardness in the production process, especially for thin-walled components. As a result, the material can be preferably adjusted to the vibration requirements. The inventive design with nodular cast iron, a high strength of the turnbuckle can be achieved without using an additional annealing process. By the use of nodular cast iron a cost-effective implementation is possible.

In a further preferred embodiment, the turnbuckle may consist, at least in sections, of composite materials with carbon fiber and / or glass fiber and / or aramid fiber. By using composite materials, the turnbuckle can be designed specifically for the corrosion requirements. It is advantageously possible to allow a higher strength, which is particularly advantageous for coastal or offshore use. Resistance to salt water and salt spray ensures safety.

In a further preferred embodiment, the turnbuckle may at least partially consist of steel, preferably of stainless steel, and have an elongation at break of preferably 35 percent, preferably 40 percent, particularly preferably 45 percent. As a result, a high toughness is ensured and the steel can pass through a high elongation before the turnbuckle fails and the connection of the components is no longer ensured. As a result, it is particularly advantageous for erection in earthquake regions that a sufficient expansion of the turnbuckle can take place before the failure. As a result, vibrations of the construction substrate can be effectively absorbed and damped, so that the building is not destroyed, or at least for a safety period remains intact.

It can be advantageous if the turnbuckle is deep-drawn, wherein the strength and toughness can be further increased by the work hardening during deep drawing of the material. By deep-drawing, the ability to absorb forces and stresses in the turnbuckle and pass it on is positively improved.

In a further advantageous embodiment, the turnbuckle may be welded. The turnbuckle is welded from the individual parts. It may be advantageous if the side walls, which are subjected to bending and torsion, have a higher wall thickness than the conically extending side walls, which are charged to a large extent to tensile stress. This allows an optimization of the turnbuckle be made to the attacking forces. It may be advantageous if the width and the height of the turnbuckle have the same length, or if the width is preferably at least 15 percent smaller than the width. Due to the compact design, the tensile forces in the turnbuckle can be directly dissipated and a high dimensional stability is achieved.

It may be advantageous if the depth of the turnbuckle is preferably at least 10 percent, preferably at least 25 percent smaller than the width B. By these circumstances, the turnbuckle is adapted to the shear stresses occurring and the safety of the turnbuckle against failure can be improved ,

The object is also achieved by a kit for connecting components, in particular precast concrete parts, with at least one turnbuckle according to the invention and at least one anchoring, preferably a wave anchor.

This solution has the advantage that a significant time savings can be achieved on the site, since no curing time is necessary and the connection of the components after installation of the turnbuckle is immediately loaded.

It may be favorable if the kit further comprises at least one recess body, which is preferably intended to be fastened to a formwork element for producing a component and which is further provided to hold at least one anchoring, preferably a wave anchor, which is provided to be inserted into the device. This has the advantage that the components can already be prepared at the factory for receiving the turnbuckle invention.

It may be advantageous if the recess body at least partially made of metal and / or plastic and is preferably at least partially magnetic. The recess body can be mounted in this way even easier on a formwork element and also removed again. In addition, an even safer placement of the recess body is possible.

In an advantageous further development of the invention, the kit may further comprise a sealing means, preferably a sealing tape, which is intended to be inserted between the components before joining them and have a sealing device sealing the turnbuckle in the mounted state to the outside from environmental influences and can be removed repeatedly. By using such a sealant even higher water and gas impermeability of the joints between the components is achieved. The sealing device is designed for example in the form of a folding or lancing cover. As a result, the recess after the mon- Due to the accessibility, the turnbuckle can always be checked for maintenance and repair purposes without having to remove filling mortar.

The above object is also achieved by a method for joining components, in particular precast concrete parts, comprising the following steps:

Assembling of each with at least one recess and an anchor, preferably a wave anchor, provided components, so that the recesses facing the components to be joined, inserting the turnbuckle invention in the recesses of the components, inserting the fasteners through the access opening in the receiving space and each a passage portion of the turnbuckle in each case an anchor, preferably a wave anchor, fixing the fastening means, attaching the sealing device.

This solution has the advantage that the assembly of the components is greatly simplified and high precision in production is achieved. In addition, a significant time savings on the construction site is possible. The components can thus be connected efficiently and quickly. The clamping of the components is possible without additional materials and special aids. Disassembly of the components can be performed in reverse order. This has the advantage that temporary structures can be dismantled again with a low expenditure of time and money.

In addition, it may prove advantageous if the thickness of the components is greater than the depth of the recess. This allows an even better sealing of the components. In addition, it may be advantageous if the recess is at least 40 percent or preferably at least 50 percent of the thickness of the components. As a result, the connection position of the components can be further displaced in the direction of the symmetry axis of the components, so that a symmetrical introduction of force from the turnbuckle into the components is ensured. Thus, a linear arrangement of the components is possible and the generation of transverse forces by an asymmetric mounting of the components can be prevented.

If a sealant, preferably a sealing tape, is inserted between the sides of the components to be joined prior to bonding, the water and gas impermeability of a joint between the connected components can be increased. In addition, it may prove advantageous if, in the connected state of the components, the sealing means runs behind the turnbuckle, since thus the seal can be further increased. The course of the sealant ensures a free design of the sealing joint. This also designed as open space components can be sealingly connected by the turnbuckle.

Advantageously, the recesses can be arranged on the front and back of the device. As a result, the components can preferably be connected to two turnbuckles in such a way that a turnbuckle is arranged on the front side and a turnbuckle on the rear side. Due to the arrangement, a good distribution of the transverse forces is possible and the components are loaded symmetrically.

Furthermore, the above object is achieved by an arrangement for connecting components, in particular precast concrete parts, with at least one turnbuckle according to the invention, at least two components, each having at least one recess into which the turnbuckle can be inserted and an anchor, preferably a wave anchor, over the recess is accessible and fasteners, wherein the recess is finally closed with a reversibly removable sealing device.

This solution has the advantage that a rational and fast connection of components, which is also safe, is possible. In this way costs and time can be saved. The sealing device additionally serves for easy accessibility of the component connection for subsequent maintenance work or for the purpose of rapid disassembly of the components. This eliminates the need to remove filler mortar which is otherwise commonly used to seal joints.

It may be advantageous if the arrangement additionally has a sealing element, preferably a sealing strip, which is provided to be inserted between the sides of the components to be connected prior to joining them. In this way, the water and gas impermeability of a joint between the connected components can be increased.

In addition, the above object is achieved by a method for preparing components, preferably precast concrete parts, in which the turnbuckle according to the invention is to be used, which comprises the following steps:

Attaching a preferably at least partially magnetic recess body, the at least one anchoring, preferably a wave anchor stops on a formwork element, filling the formwork element with a filler, preferably with Concrete, allowing the filler to cure, removing the formwork element and the recess body.

This solution has the advantage that the components can be prefabricated with high precision and can be quickly and safely connected to the construction site by the turnbuckle invention without additional materials.

The invention is explained below with reference to an embodiment and associated drawings.

These drawings show:

Fig. 1 is a schematic representation of the turnbuckle invention with

Access openings

2 is a plan view of the turnbuckle invention,

3 is a sectional view of FIG. 2 along the line E-E,

4 is a sectional view of FIG. 2 along the line D-D,

5 is a sectional view of FIG. 2 taken along the line C-C,

6 is a schematic representation of two components with a sealing band and inserted turnbuckle,

7 is a sectional view of Fig. 6 along the line A-A,

8 shows a formwork element with recess body and wave anchor,

Fig. 9 schematic representation of the turnbuckle invention without

Access openings

10 is a sectional view according to Figure 7 of another embodiment,

11 is a sectional view according to Figure 7 of another embodiment,

12 is a view of the turnbuckle of a welded design,

Fig. 13 is a schematic representation of the turnbuckle invention to illustrate the dimensions. Fig. 1 shows a schematic representation of the turnbuckle 1 according to the invention for connecting components 10, in particular precast concrete elements 10 (see Fig. 6). As can be seen from FIG. 1, the turnbuckle 1 is substantially cup-shaped and has a receiving space 2 accessible from outside via an access opening 9. In addition, the turnbuckle 1 has two mutually opposite (offset by 90 °), opening into the receiving space 2 passage openings 3, 4 for passing through fastening means, such as screws 13 (see Fig .. 6). In the present embodiment, a passage opening 3 is formed as a slot 3, which is open on one side and opens into the access opening 9. The other passage opening 4 is formed in the present embodiment as a slot 4. The slot 3 and the slot 4 are formed in the flat and opposite side walls 7, 8.

The number, design and arrangement of the Durchtrittsöff- openings 3, 4 shown in the embodiment is only to be regarded as an example. For more effective assembly and better compensation possibility of the production-related tolerances provided with connection points so the flat side walls 7, 8 of the turnbuckle 1, for. each be provided with a slot 3 or slot and / or a slot or two offset by 90 ° slots.

The side walls 5, 6 are tapered, d. H. tapered and curved formed.

The conical side walls 5, 6 are integrally formed in the present embodiment and have a U-shaped cross-section. The one-piece design of the conical side walls 5, 6 is only exemplary. Alternatively, the conical side walls 5, 6 may also be formed as individual side walls, which are interconnected. A V-shaped cross section is conceivable.

To save weight, access openings 20, which are designed here as recesses 20, are made in the conical side walls 5, 6 and in the bottom 21 of the turnbuckle 1 (see FIG. The arrangement and number of access openings 20 depends on the particular circumstances. In order to obtain a particularly high stability of the turnbuckle 1, it is also conceivable to provide no access openings 20 (compare Fig. 9). If necessary, access openings can be arranged only or additionally in the flat side walls 7, 8.

Due to the conical design of the side walls 5, 6, the required clearance for the rotational movement of a clamping tool, not shown in creating a screw is given. The turnbuckle 1 consists at least in sections of plastic and / or metal and / or preferably of a cast steel and / or steel. Preferably, the steel has a tensile strength of at least 400N / mm ² to 800N / mm ² , preferably 450N / mm ² to 780N / mm ² , more preferably 500N / mm ² to 750N / mm ^2, and is preferably made of stainless steel. A highly resilient cast steel guarantees the removal of the tensile and shear forces occurring and also ensures a rational and cost-effective production of the turnbuckle 1. Due to its geometric shape and arrangement of the passage openings 3, 4, which can also be considered as recesses 3, 4, for the screw connections takes the turnbuckle 1 according to the invention, the tensile and shear forces occurring for the connection to be created with the corresponding components 10 (see Fig .. 6). Instead of screw connections, other suitable connections are possible.

From Fig. 2 is a plan view of the turnbuckle 1 can be seen. In Fig. 2, the access openings 20 can be seen particularly well. Also, Fig. 3 shows particularly clearly an access opening 20. FIG. 4 shows the planar side wall 8 with the slot 4 and FIG.

5 shows the planar side wall 7 with the slot 3. In addition, in FIG. 5, the opening angle of the side wall 7 is indicated at 38.8 °. This angle is to be regarded as exemplary only and can be adapted to the circumstances.

Fig. 6 shows two components 10, each having a recess 11, in which the turnbuckle 1 according to the invention is used. The turnbuckle 1 is fastened to a component 10 with a respective screw 13 and a washer 12. Between the sides to be joined 18, 19 of the components 10 is a sealing tape 14. As shown in FIG.

6, the sealing strip 14 extends behind the turnbuckle 1.

In conjunction with an elastic, preferably swellable sealing tape 14 made of natural or synthetic rubber and / or bitumen-based, as known for example under the trade name RubberElast ^® , the turnbuckle 1 according to the invention can also be used for a variety of structural solutions with precast concrete parts in the WU area , As can be seen from FIG. 6, the sealing tape 14 is attached in the joint area of the components 10 to be joined and compressed by the tensioning mechanism 1 introduced by the tensioning mechanism. Assembly and sealing are reduced to one operation. Ideally, the sealing tape 14 is self-adhesive and permanently bonded by the contact pressure elastic with the concrete element 10. Immediately after assembly, the gap 22 between the concrete elements 10 is watertight. Other embodiments of the sealing tape 14, which are not self-adhesive, are conceivable. Thanks to the extremely high water and gas impermeability of the material as well as its mechanical and chemical resistance, a sealing tape 14, such as Rubber-Elast ^{®, is} an ideal solution for joint sealing in WU prefabricated parts. Troughs, shafts, canals but also WU cellar in the residential building are not only securely sealed but also mounted very quickly and cost-saving.

In addition to RubberElast ^® , other sealing tapes or sealants are conceivable. The sealing tape 14 used ideally has, in addition to an extremely high water and gas impermeability, a very good adhesion by adhesion, rapid processing, with no tools required and is waterproof immediately after installation. Depending on the application, the sealing strip 14 should be flexible, acid, running, salt and liquid manure resistant even at low temperatures. In addition, the sealing tape 14 should be weatherproof and generally inspected by building inspectorate. Depending on the application, the sealing tape 14 does not have all the listed properties.

6 is connected to a shaft anchor 16 (see FIG.

Fig. 7 shows a sectional view of Fig. 6 along the line A-A. In this figure, it can be seen particularly clearly that a thickness D of the component 10 is greater than a depth T of the recess 11. In addition, it is shown that the sealing band 14 has passed behind the turnbuckle 1. Furthermore, the slot 4, the washer 12 and the screw 13 are shown.

FIG. 8 shows a formwork element 17 with a recess body 15 and the wave anchor 16.

Usually there is a casing of two formwork elements 17, between which the filler, eg concrete, is filled. In Fig. 8, only one formwork element 17 is shown. The wave anchor 16 has proved to be particularly advantageous and has a building inspection approval for the continuous load case. However, other suitable anchorages are conceivable. The recess body 15 has conical side walls to be more easily removed from the precast concrete part. The concrete design of the recess body can be adapted to the circumstances. The recess body 15 is advantageously magnetically attached to the formwork element 17. This makes it easy to attach the recess body 15 to the formwork element 17. It is also conceivable to clamp the recess body 15 between two formwork elements 17 or fasten with screws or nails. Other suitable attachment methods are conceivable. As can be seen in FIG. 8, the shaft anchor 16 is partially in the recess body 15 is inserted. Thus, the wave anchor 16 is fixed during the Einöllens of concrete on the formwork element 17.

The kit according to the invention for connecting components 10, which may also be referred to as a clamping system, comprises the turnbuckle 1 according to the invention and at least one anchoring 16. Furthermore, the kit may comprise at least one recess body 15 as described above and at least one anchoring 16 such as e.g. have the above-described wave armature 16, which is intended to be inserted into the device 10. In addition, if a particularly tight connection between the components 10 is required, the kit may include a sealant 14 such as e.g. have the sealing tape described above.

This sealing tape 14 is inserted before connecting the components 10 between the sides 18, 19 of the components 10 to be joined.

According to the method according to the invention for connecting components 10 such as e.g. Prefabricated concrete parts 10 are first the components 10, each having at least one recess 11, assembled so that the recesses 11 are of the components to be connected 10 opposite. Ideally, an anchorage 16 is already e.g. the above-described wave anchor 16 in the device such. the precast concrete 10 is embedded.

Thereafter, the turnbuckle invention is inserted into the recesses 11 of the components 10. Thereafter, the screws 13 are inserted through the access opening 9 into the receiving space 2 and through a respective passage section 3, 4, as e.g. the slot 3 or the slot 4 of the turnbuckle 1, inserted into the anchorage. Due to the design of the slot 3 and the slot 4 is an effective assembly and better compensation possibility of manufacturing tolerances provided with connection points possible.

The turnbuckle 1 is then fixed with the screws 13 and the washers 12. Thereafter, the screws 13 are replaced e.g. tightened with a ring ratchet or with a torque wrench.

This order is only an example and can be changed. It is conceivable, for example, that the anchors are not already installed at the factory in the components, but are used on the site. If a water- and / or gas-impermeable connection is desired, it is necessary to insert a sealant 14 between the sides 18, 19 of the components 10 to be joined. The use of a sealing tape 14 such as RubberElast ^® is particularly advantageous.

If this sealing strip 14 extends in the connected state of the components 10 behind the turnbuckle 1, a particularly good seal is possible.

The inventive arrangement for connecting components 10 has at least one inventive turnbuckle 1, two components 10, each having at least one recess 1 1, in which the turnbuckle 1 is inserted, and an anchor 16 preferably in a wave armature 16, which via the recess 1 1 is accessible and fastener 13. In addition, the arrangement, if a tight connection is desired, have the sealing tape 14 described above.

In the method according to the invention for preparing components 10 such as e.g. Precast concrete parts 10, in which the turnbuckle 1 according to the invention is to be used, at least one recess body 15 is first attached to the formwork element 17. An easy assembly and disassembly of the recess body 15 is possible if it is magnetically attached to the formwork element 17. However, there are also other attachment options such. Screws or clamps conceivable. This recess body 15 holds at least one anchoring 16, e.g. a shaft anchor 16. After attaching the recess body 15 to the anchor 16, the formwork element 17 is filled with a filler, e.g. Concrete filled. In Figure 8, only one formwork element 17 is shown. For filling, however, two formwork elements 17 are required. After curing of the filler, the formwork elements 17 and the recess body 15 are removed. The anchor 16, which was removably secured in the recess body 15, remains in the component 10.

The present invention relates to a turnbuckle 1, which may also be referred to as a clamping device, for mounting a permanent connection of precast concrete parts 10 or similar structural elements of other suitable materials. This turnbuckle 1 allows by its trained specific shape and the arranged fasteners such as screwing, especially screws, a bracing and the rapid rational assembly and permanent structural connection of precast concrete elements 10, such as precast concrete elements 10 or components 10 of other suitable materials. The special geometric shape of the turnbuckle 1 allows screw anchors and embedded in the concrete elements 10 wave anchors 16 and anchor sleeves assembly and permanent connection of the concrete elements 10 and loading. tonfertigteile 10. The turnbuckle 1 according to the invention thus simplifies the installation of precast concrete 10 strong, promises high precision in manufacturing and a significant time savings on site.

Possible areas of application include the fixed and permanent connection of floor and ceiling slabs, sandwich panels, double walls and angle brackets.

In addition to the use as a constructive connection element, the turnbuckle 1 is provided for the scheduled and permanent transmission of tensile and shear forces at predominantly static loads.

The tensioning system consists of a turnbuckle 1 according to the invention and anchors 16, e.g. Shaft anchors 16, which are intended to be embedded in the precast concrete elements 10. Conceivable are two versions, which can be loaded with tensile forces of up to 50 kN or 100 kN. This information is to be regarded as exemplary only. Depending on the circumstances and versions with lower or higher tensile forces are conceivable.

As already described in detail above, there are shaft anchors 16 or anchor sleeves and magnetically anchored on the formwork element 17 or a pallet recess body 15, for example, for the factory preparation of the clamping point. at least partially made of plastic. These recess body 15 can be positioned with a few simple steps. At the construction site, the concrete elements 10 are brought together, the turnbuckle 1 used, clamped with the associated screws 13 and thus constructively connected.

In particular, prefabrication can be made precisely in the precast concrete plant. The exact positioning of the shaft anchors or anchor sleeves and the formation of the recess by means of the magnetic recess body in only one step.

A sealing tape 14 such as RubberElast ^® is simply pressed onto the concrete during assembly in the area of the butt joint. Ideally, this sealing tape 14 is self-adhesive. A protective strip of the sealing tape 14 is removed and the next concrete element 10 is pressed against the sealing strip 14.

The turnbuckle is inserted and fixed with the screws and washers or washers. Finally, the screws are tightened with a ring ratchet or torque wrench.

The clamping system offers many universal applications, for example in the installation of angle brackets, which are used in road and civil engineering, gardening and landscaping and coastal protection area, as well as in the connection of floor slabs, shaft sections, ceiling and wall elements and many other constructive precast concrete.

The advantages of the turnbuckle according to the invention lie in the efficient and rapid connection of components 10, the clamping of the components 10 without additional materials and special aids. In addition, the turnbuckle can be combined with all approved anchor systems and has a low dead weight. Complex individual solutions are eliminated with the turnbuckle invention. Due to the magnetic technology (recess body 15 magnetically attachable to formwork element 17) an accurate positioning in the manufacturing process is possible. Furthermore, the use of the turnbuckle offers the possibility to access the component connections accessible for maintenance with little effort. As a result, a functioning connection of the connected components can be ensured even over long periods of time.

The use of a sealing tape 14 such as RubberElast ^® ensures an extremely high water and gas impermeability, a very good adhesion by adhesion, a fast processing, where no tools are required. The connection is waterproof immediately after installation. In addition, the sealing tape is flexible even at low temperatures, resistant to acids, alkalis, salts and weathering.

FIG. 10 shows a further exemplary embodiment. The recess 11 has a greater depth T. As a result, the turnbuckle together with the shaft anchor can be positioned closer to the central axis of the component 10. As a result of this construction, the introduction of force is closer to the neutral fiber of the component 10 and the edges of the components 10 to be screwed are uniformly loaded. The course of the sealing means 14 is adapted to the position of the recess 11 and differs in the region of the recess 11 from the straight course. Shown is an angled course of the sealant 14, but it is also a curve-like course conceivable in which the direction can be changed continuously.

FIG. 11 shows a further exemplary embodiment. The turnbuckles 1 can not only be installed on one side of the component 1. Thus, it is possible to attach the turnbuckles 1 at different heights on opposite sides of the component 1. Through this structure, a favorable force curve can be achieved because the clamping forces are evenly distributed by the screwing together of the components 1. The course of the sealant 14 is adapted to the position of the recesses 11 and is shown in this example with an angled S-shaped curve, but also continuous changes in direction can be made.

FIG. 12 shows the turnbuckle 1 in one exemplary embodiment for a welded design. Due to the adjacent component forces acting on the turnbuckle and the resulting stresses, the design is adapted by changing the wall thicknesses of the individual components. The two conical side walls (5, 6) are connected to a trough shape. As a result, in the manufacturing process by inserting the side walls (7, 8) and welding the turnbuckle can be easily made. The side walls (7, 8) have a greater wall thickness than the conical side walls (5, 6). By connecting to the components (10), the side walls (7, 8) are subjected to bending, so that inside the side walls (7, 8) shear stresses arise. By thickening this area can be specifically strengthened. Furthermore, the thickening helps to prevent deformations caused by the generation of component stresses by welding.

In summary, results from the turnbuckle invention, the ability to cost and time-saving to connect prefabricated components together. In this case, the turnbuckle may be manufactured in different designs, wherein advantageously a welded construction, a design by deep drawing or a design as a composite material, possibly with adhesive technology can be used. In this case, the materials in question may also be cast steel materials, but also malleable cast iron, nodular cast iron or steel, in which case especially stainless steels, preferably stainless steels, may be used. By these embodiments, a higher mechanical strength of the turnbuckle can be achieved, as well as a better corrosion resistance. By the embodiments, a use of the turnbuckle according to the invention is also possible in earthquake-loaded areas. By the method for producing the components, the use of different, variably modifiable Aussparungskörpern is possible.

Claims

claims

First turnbuckle (1) for connecting precast concrete parts (10) which is substantially cup-shaped with at least two side walls (7, 8) which are substantially planar and parallel to each other, and at least two tapered, preferably tapered, side walls (5, 6), and the one receiving at least from the outside via an access opening (9) receiving space (2) and in addition, preferably opposing, in the receiving space (2) opening through passage sections (3, 4), as passage openings (3, 4), for passing through fastening means (13), wherein the passage sections (3, 4) in the planar side walls (7, 8) are formed, and that the turnbuckle (1) preferably has a tensile strength of 400 N / mm ² to 800 N / mm ² , preferably 450 N / mm ² to 780 N / mm ² , particularly preferably 500 N / mm ² to 750 N / mm ² .

2. Turnbuckle (1) according to claim 1, characterized in that the tapered side walls (5, 6) are interconnected, so that the cross section is V- or U-shaped, and that the passage portions (3, 4), preferably to 90 ° are offset, and as a slot (3) and / or slot (4) are formed and preferably one of the passage sections as a slot (3) and another of the passage sections as a slot (4) is formed and / or the slot (3) is open at least on one side and preferably in the access opening (9) opens.

3. Turnbuckle (1) according to at least one of the preceding claims, characterized in that the turnbuckle (1) at least partially consists of a malleable cast iron or of a nodular cast iron.

4. turnbuckle (1) after at least one. of the preceding claims, characterized in that the turnbuckle (1) consists at least in sections of composite material with carbon fiber and / or glass fiber and / or aramid fiber.

5. Turnbuckle (1) according to at least one of the preceding claims, characterized in that the turnbuckle (1) consists at least partially of steel, preferably of stainless steel, and that the elongation at break of the steel is preferably 35 percent, preferably 40 percent, especially preferably 45 percent.

6. Turnbuckle (1) according to at least one of the preceding claims, characterized in that the turnbuckle (1) is deep-drawn.

7. Turnbuckle (1) according to at least one of the preceding claims, characterized in that the turnbuckle (1) is welded, wherein preferably the side walls (7, 8) have a greater wall thickness than the conical side walls (5, 6).

8. turnbuckle (1) according to at least one of the preceding claims, characterized in that wherein the width (B) and the height (A) of the turnbuckle (1) have the same length, or that the width (B) is preferably at least 15 percent smaller than the height (A).

9. turnbuckle (1) according to at least one of the preceding claims, characterized in that the depth (C) of the turnbuckle (1) is preferably at least 10 percent, preferably 25 percent smaller than the width (B).

10. Kit for connecting precast concrete parts (10), with at least one turnbuckle (1) according to claim 1 to 10 and at least one anchor (16), preferably a wave anchor (16).

11. Kit according to at least one of the preceding claims, characterized in that the kit further comprises a sealing means (14), preferably a sealing strip (14), which is provided before the joining of the components (10) to be inserted between them, and a sealing device which seals the turnbuckle (1) in the assembled state and can be removed repeatedly.

12. Method for joining precast concrete parts (10), comprising the following steps:

Assembling components (10) provided with in each case at least one recess (11) and an anchoring (16), preferably a shaft anchor (16), so that the recesses (11) lie opposite the components (10) to be connected,

Inserting the turnbuckle (1) according to claim 1 to 4 in the recesses (11) of the components (10) that the thickness (D) of the components (10) is greater than the depth (T) of the recess (11), wherein the depth (T) of the recess preferably at least 40 percent, more preferably at least 50 percent of the thickness (D) of the components is.

Inserting the fastening means (13) through the access opening (9) into the receiving space (2) and through in each case one passage section (3, 4) of the turnbuckle (1) in each case an anchoring (16), preferably a wave anchor (16),

Attach the fasteners (13).

13. The method according to claim 11, characterized in that between the sides to be joined (18, 19) of the components (10) prior to bonding a sealing means (14), preferably sealing tape (14) is inserted, and preferably in the connected state of the components (10) the sealing means (14) behind the turnbuckle (1) extends, and that preferably the recesses (11) on the front and back of the device (10) are formed.

14. Arrangement for connecting precast concrete parts (10), with at least one turnbuckle (1) according to claim 1 to 4, at least two components (10), each having at least one recess (11) into which the turnbuckle (1) can be inserted and a Anchoring, preferably a wave anchor (16) which is accessible via the recess (11), and fastening means (13), wherein finally the recess (11) is closed with a reversibly removable covering device.