Connecting structure for tubes used in furniture and rack constructions has threaded holes in connecting elements and with countersink to accommodate flange of threaded bolt in initial stage of connection

摘要

The connecting structure for tubes consists of several tubes (2) and connecting elements (3) which have threaded holes (31) corresponding to holes (22) in the tube close to the connecting end. The threaded holes have a countersink (32), and threaded bolts (4) at a suitable point have a flange (41) and before connection in the threaded holes are rotated, whereby the flange of each bolt is first located in the countersink and then the connecting element is fitted in the tube and the bolt turned in the opposite direction so that the flange of the bolt is pressed against the inner wall of the tube.