DE2223556A1 - TENSION-RESISTANT AND COMPRESSION-FREE GAP-FREE JOINT CONNECTION FOR RIBBED CONCRETE STEELS - Google Patents

Description

PATENT DESCRIBE TENSION AND PRESSURE-RESISTANT GAP-FREE JOINT CONNECTION FOR CONCRETE RIB CONCRETE In steel construction, the reinforcing bars often have to be Very tight spaces can be coupled in such a way that a tension, pressure or alternating load can be passed on. Such a butt connection must be as follows Features: 1. Short overall length 2. Can be installed in confined spaces without special tools 3. Since the bars are often bent, the connection must be can be produced without the rods having to be rotated.

4. In order to avoid errors, the connection must be made as little as possible Parts exist and must therefore be able to interleave with lock nuts.

A number of butt joints are known which are made by welding, Screws or presses are made. All known butt joint types have in common that they do not fully meet the requirements set out above.

On the other hand, a butt joint according to the invention is distinguished by this from the fact that it fulfills all requirements and that it follows: 1. Up the rods (1 + 2) to be connected are pressed or welded on end sleeves (3 + 4). This work can be done outside the building in advance. The end sleeves have internal threads, whereby one side must be left-handed and the other right-handed. At the installation site, the belden ends are now connected to the threaded coupling bolt (5). The coupling bolt is in the center is provided with a hexagon or a similar shape that makes it possible a ring (6) can be moved transversely but positively pushed on for torques. With this intermediate ring, the screw connection is now tightened. Since it is If it is fine-grained, it is possible to connect with a small one Tighten the torque without any slip. Check the required torque is possible with a commercially available torque wrench of the usual size. It is it is also conceivable to replace the intermediate washer with one or more disc springs, which are laid out in their characteristic curve in such a way that they only work when the slot: -load is reached the connection plan. Thus, a control of the properly manufactured The joint is possible without external aids and thus processing with ordinary Losing wrenches.

Claims (5)

Claims: 1. Pleifrele screw connection, characterized in that that a left- and right-handed threaded bolt is designed in the middle, that it has a polygon, serration or other profiling that it allows an intermediate ring to be worn laterally but to transmit torque to build in, PATENT DESCRIPTION TENSION- AND PRESSURE-RESISTANT PLAY-FREE JOINT CONNECTION FOR CONCRETE RIB STEELS 2. A compound according to claim 1, characterized in that the intermediate ring by changing its shape or position, eliminating the Frictional losses in the thread and in the flat surfaces the presence of the prescribed Indicates pretensioning force by z. B. trains as a disc spring or with a Equipped predetermined pinch point. 3. Compound according to claim 1 and 2, characterized in that one builds up the intermediate ring from several rings 4. Compound according to claim 1 - 3 thereby characterized in that the holes in the internal thread are countersunk as far as that of the bolts can compensate for the inaccuracies when screwing in for the first time. 5. Game-free screw connection, characterized in that threaded ends with external thread on the left or right at the rod ends cut open or butt-welded and screwed together with a pipe sleeve with an internal thread be that the two end faces of the bolts are screwed against each other.