| 摘要 |
A coupling for coupling together a plurality of elongate members, particularly members of a planar framework structure, which coupling includes a separate coupling element welded to each one of the members to be coupled together and a locking ring which is received within a groove in each of the coupling elements. A frusto-pyramidal expansion member is received within a space between the coupling elements within the locking ring and when urged further into said space forces the coupling elements radially outwardly thus frictionally securing the locking ring against the inner walls of the grooves. Further members of the framework structure may also be coupled to the coupling by clamping an end of such members between the locking ring and the inner wall of the grooves. |
