| 摘要 |
A nosepiece assembly for blind pull-through riveting tool has long nosepiece jaws (11a, 11a) for access in to deep, narrow cavities. The inside of the nosepiece assembly is provided with means for locking the jaws together at least when a rivet is being installed. The locking means comprises frusto-conical locking face (35) on the front end of a tube (34) fixed to the tool barrel (18), co-operating with two half frusto-conical faces on the inside of the jaws. The locking faces are normally urged out of engagement by the spring (20) and are urged in to locking engagement by the rearwards axial force exerted on the jaw anvil (25) by the head (33) of the rivet being installed. In a modification, the spring (20) normally urges the locking faces (35, 36) into engagement, and they are urged out of engagement by the next rivet being fed forwardly through the anvil parts (13, 13). <IMAGE> |
