Abstract: A construction set for the erection of support structures comprises supporting rods and at least one connecting joint containing a plurality of mutually parallel chambers. Cylindrical beads are formed on the ends of supporting rods. Those beads are inserted into the cylindrical chambers of the connecting joint. The chambers are dimensioned to form a clearance relative to the beads in order to facilitate the insertion of the beads into the chambers. The beads are formed by a rolling-in of the free ends of the supporting rods.

Abstract: A construction set for the erection of support structures comprises supporting rods and at least one connecting joint containing a plurality of mutually parallel chambers. Cylindrical beads are formed on the ends of supporting rods. Those beads are inserted into the cylindrical chambers of the connecting joint. The chambers are dimensioned to form a clearance relative to the beads in order to facilitate the insertion of the beads into the chambers. The beads are formed by a rolling-in of the free ends of the supporting rods.

Abstract: In a framework made of separably connected profile bars, some of the bars have longitudinal slots and others have hollow sections for engagement of a coupling member in their face ends. The coupling member consists of a bearing housing with an upwardly oriented wedge surface and a holding member with a matching inclined surface which is forced against the wedge surface by a spring force. The holding member can be moved in a longitudinal direction by an eccentric pin arranged transversely to the profile bar and located with its actuating end in a cross hole of the profile bar so that a coupling hook at the end of the holding member is movable both longitudinally relative to stationary projections of the bearing housing as well as laterally due to the rising movement of the matching inclined surface along the wedge surface.

Abstract: A framework comprises bars coupled together by a coupling carried by some of the bars (carrier bars). The other bars have undercut longitudinal slots which receive coupling ends of the coupling. The coupling includes a bearing member on which is mounted an eccentric member which is rotatably accessible from one face of the bar, and a holding member which can be displaced longitudinally and laterally in response to rotation of the eccentric member. The holding member has a hook-shaped coupling end which, in the coupled position, engages in the undercut longitudinal slot in the other bar. The holding member comprises a tongs-shaped leaf-spring comprising a pair of arms joined at one end by a web. The leaf-spring surrounds the bearing member. The holding member includes a recess for housing the eccentric member. The outer end of the bearing member has a wedge portion which extends as far as the longitudinal slot in the other bar when the bars are connected.