| 摘要 |
A device for interconnecting the arms (1,2) of a jib of a machine such as an excavator, a crane or the like, said arms being relatively displaceable and fixable in a plurality of positions, whereby one of the arms is provided with coupling pieces (16,17) extending transversely of the direction of length of the arms and the other arm is provided with at least one clamping piece (23) having a part (30) gripping around a coupling piece, whilst one of the arms is furthermore provided with a slidable lock (24) with the aid of which a coupling piece and a clamping piece can be pressed one to the other. |
