Framework of releasably-connectable bars

In a frame assembly of the type comprising separate, interconnected bars, of which at least some have undercut longitudinal slots which lockingly receive the coupling ends of coupling members that project from ends of other bars, said other bars each having a bearing member carrying a transversely oriented eccentric member which is rotatably operable from one external face of said other bar, and a holding member which can be displaced longitudinally and laterally in response to rotation of the eccentric member, the holding member having a hook-shaped coupling end which, in the coupled position, engages in one of said undercut longitudinal slots, the improvement wherein said bearing member has a longitudinal central wall, said holding member including a tongs-shaped leaf-spring comprising a pair of arms joined at one end by a web, the free ends of the arms forming holding means, an inner end portion of said central wall of said bearing member including a recess for housing said eccentric member, an outer end of said bearing member having a wedge portion which extends as far as said longitudinal slot when the bars are coupled, an inside surface of said leaf-spring web defining an engagement surface for said eccentric member to displace said holding member, said two arms of said leaf-spring having oppositely directed hooked ends and convergent sloping portions disposed adjacent said wedge portion which are spread apart by said wedge portion when the holding member is displaced inwardly by said eccentric member.