EP2233664B1 - Device for connecting prefabricated concrete sections - Google Patents

Abstract

The device has cable sections forming a cable loop (20) that includes a cable core to hold the cable sections in bent position. The cable core is plastically deformed and lies within the cable sections of the cable loop. An insert body (10) includes an opening for the cable loop and inserted into a recess (1a) of pre-cast concrete sections (1, 2). The insert body is located at a front side on the pre-cast concrete sections such that the pre-cast concrete sections are surface-precisely locked with the front edge.

Description

The present invention relates to a device for bonding prefabricated concrete parts, comprising a cable loop, wherein the cable sections forming the cable loop have means to hold the cable sections in an angled position. The subject matter of the invention is also a ready-mixed concrete part with a device of the aforementioned type.

Such devices with cable loop for the composite of precast concrete parts, in particular of prefabricated wall elements Concrete are well known in the art. Such devices usually comprise a holding part in the form of a U-shaped rail, which is embedded in the front part of the precast concrete part. For transport and also during the assembly of such a precast concrete part, it is necessary that the cable loop substantially does not project beyond the end face. In this respect, it must be achieved that the cable loop is received by the holding part, that does not substantially over the holding part.

In this connection, various devices are known from the prior art, which meet this premise in principle. For example, from the EP 1 637 670 A1 a receiving box is known, which has a removable lid, wherein the cable loop, which protrudes through an opening in the back of the receiving box is held by a spreading spring against the removable cover during transport or even during assembly tensioned. Then, when the lid is removed, the rope loop speeds not only due to the bias of the spreading spring, but also due to the elastic properties of the rope loop to the front and goes z. B. in a vertical wall element in an approximately horizontal position over. That is, the cable loop extends in the direction of the front side of the opposite precast concrete part.

The effort that is operated in the prior art to keep the cable loop during transport and assembly in an approximately 90 ° angled state and thus parallel to the top of the precast concrete part is high, which is why such devices are also very expensive.

Furthermore, from the EP 0 914 531 B1 a device is known, which also has a U-shaped holding part, which has a passage opening for the cable loop on the back, wherein the holding part is approximately U-shaped, wherein the legs are angled end-to-end. The cable loop now projects with its loop-shaped end through the arranged on the back opening in the holding part, and is located from the inside to the bends of the legs of the holding part. After assembly, the cable loop is pulled out with the loop-shaped end of the holding part, the cable loop snaps.

A similar education shows the utility model DE 20 2007 011 243 U1 inasmuch as there is provided for fixation of the cable loop a molded part which has the angled cable eye forming portion of the rope from at least three sides form-fitting, and which is removable after the casting of concrete precast concrete part of the precast concrete element and the cable eye.

Here, the effort to keep the cable loop in the angled state, relatively high, especially since a specially trained rail must be made as a holding part, in addition, the cable loop is held in the transition to the precast concrete part by an insert body in the opening of the holding part. This device is therefore relatively expensive.

Finally, out of the EP 0 534 475 B1 a device is known in which an insertion shell part is provided and a lid, wherein the insertion tray part receives the lid by means of a snap connection. By the insertion tray part in conjunction with the lid, the loop-shaped end is held parallel to the end face of the precast concrete part. Again, that the production of such a device is complicated and expensive.

From the DE 33 22 646 A1 a rope transport anchor is known, which has a loop at the end. The merging and bending of middle cable areas is carried out by a guide and angling, which is formed by a sleeve.

• Die Seilschlaufe ragt, wie bereits ausgeführt, mit ihrem schlaufenförmigen Ende nach der Montage auf die Stirnseite des gegenüberliegenden Fertigbetonteils zu. Mit ihrem anderen Ende befindet sich die Seilschlaufe in dem Fertigbetonteil. Ist die Seilschlaufe einmal gelöst, d. h. aus ihrer abgewinkelten Lage befreit worden, ist es nicht notwendig, dass die Seilschlaufe in diese Ausgangsstellung zurück überführt wird, es muss lediglich sichergestellt sein, dass während des Transports und während der Montage die Seilschlaufe in der abgewinkelten Position verbleibt.

The object underlying the invention is therefore to produce a device of the type mentioned, which is particularly inexpensive to manufacture, but still reliably fulfills the same purpose as the prior art. Please note the following:

• The rope loop protrudes, as already stated, with its loop-shaped end after mounting on the front side of the opposite precast concrete part. With its other end, the rope loop is in the precast concrete part. Once the cable loop has been loosened, ie freed from its angled position, it is not necessary for the cable loop to be returned to this starting position, it merely has to be ensured that the cable loop remains in the angled position during transport and during assembly ,

Taking this into account, the device according to the invention is characterized in that the cable sections forming the loop have means for holding the cable sections in an angled position, wherein the means for holding the cable loop in an angled position are plastically deformable cuffs forming the cable section grasp the cable loop, in the area of which the bending of the cable loop is provided. The material of the cuffs is in this case such that the cuffs break when re-deformed. In that sense, for the cuff in particular be provided a plastic material which surrounds the cable portion sleeve-shaped, and then to bend by means of a suitable device, the cuff together with the cable section guided therein by the desired angle of about 90 °. If the cable loop is then bent back, breaks the cuff, which means that the rope loop is due to their elastic properties. From this it is clear that the rope sections forming the loop are held in their angled position by means which are directly in connection with the cable loop or are part of the cable loop. This is in contrast to the prior art, where in each case a separate device is required to hold the cable loop only for transport and assembly in the angled position. Since this separate device is eliminated, such a rope loop is much cheaper to produce. In particular, insofar now also exists the possibility to engage or einzubetonieren the cable loop directly into the face of a precast concrete part, since - as already stated - separate devices to hold the cable loop in an angled position during transport and during assembly, are no longer required ,

According to a further feature of the invention, it is provided that the cable loop has an insert body, wherein the insert body has at least one opening for the cable loop. The insert body is in particular U-shaped in cross-section, the web connecting the two legs of the U-shaped insert body having the opening for the cable loop. Through this opening, the cable loop protrudes with its closed end, said end is also poured into the precast concrete part. With its angled loop-shaped end, the cable loop is in the cross-sectionally U-shaped rail a.

The invention also relates to a precast concrete part, in particular a wall element made of ready-mixed concrete, which is characterized by at least one device of the aforementioned type. Specifically, it is provided in this context that the insert body occupies the front side in the precast concrete part such that it terminates flush with the front edge. It is clear from this that, when the insert body is set back in relation to the end face, a toothing with the grouting mortar occurs when the grout is filled. As a result, the compound is able to absorb shear forces. By contrast, the cable loops, which overlap in pairs such that an eyelet results, one or more reinforcing steels are pushed, which can be absorbed by the rope loops in the longitudinal direction of the cable loops forces.

Figur 1

zeigt schematisch zwei Fertigbetonteile, die beabstandet zueinander einen Stoß bilden;

Figur 2

zeigt eine Seitenansicht gemäß Figur 1;

Figur 3

zeigt die erfindungsgemäße Seilschlaufe mit einer Manschette in abgewinkelter Position;

Figur 4

zeigt eine Darstellung gemäß Figur 3 mit Einsatzkörper;

Figur 5

zeigt eine Darstellung gemäß der Linie V - V aus Figur 4.

With reference to the drawings, the invention will be explained in more detail below by way of example.

FIG. 1

schematically shows two precast concrete parts which form a joint spaced from one another;

FIG. 2

shows a side view according to FIG. 1 ;

FIG. 3

shows the cable loop according to the invention with a collar in an angled position;

FIG. 4

shows a representation according to FIG. 3 with insert body;

FIG. 5

shows a representation according to the line V - V from FIG. 4 ,

The two precast concrete parts 1 and 2 according to FIG. 1 are spaced apart to form a joint 3. At the front side, the precast concrete parts 1 and 2 each have a trapezoidal recess 1a or 2a, wherein in the bottom of the trapezoidal recess 1a, an insert body 10 is provided, which is recognizable in cross-section U-shaped profile. The insert body 10 is flush in the face of the poured respective wall element 1 and 2 respectively. The web 9 of the U-shaped insert body has a passage opening 10b for the total designated 20 rope loop. The ends of the cable loop 20 are connected by a compact 23, this part of the cable loop is poured into the concrete of the precast concrete part, just like the insert body 10. The cable loop 20 overlaps with the adjacent cable loop, wherein the eyelet 30 formed in this case a Reinforcing steel 50 absorbs. Then the shock 3 is filled with grout 40.

A side view of two interconnected prefabricated concrete parts results from the FIG. 2 ,

According to FIG. 3 the cable loop 20 is shown in the bent state of the loop-shaped end. Here, the two cable sections 21 and 22 can be seen, each receive a sleeve 26 in the region of the bend (arrow 25). The cuff is made of plastic, for example, and is configured to break in the direction of arrow 28 when the cable loop 20 is bent.

In the presentation according to FIG. 4 the insert body 10 is shown with a cable loop 20 in an angled condition. The insert body 10, which is U-shaped profile, has on its rear side ( FIG. 5 ) has an opening 10b.

Claims (4)

1. Device for joining pre-cast concrete parts (1, 2), comprising a cable loop (20), wherein the cable sections (21, 22) forming the cable loop (20) have means (26, 29) for keeping the cable sections in a bent-over position, characterised in that the means (26) are plastically deformable sleeves (26) surrounding the cable sections (21, 22), wherein the material of the sleeves (26) is such that the sleeves (26) break under return deformation.
2. Device according to claim 1, characterised in that an insert body (10) insertable into a recess (1 a, 2a) of the pre-cast concrete part is provided for the cable loop (20), wherein the insert body (10) has at least one opening (10b) for the cable loop.
3. Pre-cast concrete part, particularly wall element, with a device for joining pre-cast concrete parts, comprising a cable loop which after mounting projects by its loop-shaped end towards the end face of the opposite pre-cast concrete part and is disposed by its other end in the pre-cast concrete part, characterised by construction of the device according to claim 2.
4. Pre-cast concrete part according to claim 3, characterised in that the insert body (10) is inserted in such a manner into the pre-cast concrete part at the end face that, by the front edge, it is flush at the surface.

Images