Connecting sections of a lattice pole in the jib system of a movable crane

摘要

A three-piece link piece (3) is welded to the end of the chord tube (1a) of a section of a lattice pole; it has two outer cheeks (3a) and a centre cheek (3b). The interstitial cheeks (4a) of a two-piece link element (4) welded to the end of the chord tube (1b) protrude between these cheeks (3a) and (3b). There is a gap (5) between the link elements, which are interconnected by a connecting bolt (6). The connecting bolt (6) has a collar (6a) on one end and a pronounced chamfer (6b) and a hole for a locking pin (7) on the other. <IMAGE>