| 摘要 |
A punch assembly (10) comprising a cylindrical clamp holder (11), a ram (12) reciprocatingly movable therein and having an axial bore (12'), a punch (13) carried on said ram (12), a pair of clamps (14), (14) pivotally mounted on the clamp holder (11) and releasably holding a fastening element, a pair of washers (19), (19) received in a lateral slot (18) in the clamp holder (12) and resiliently urged against the ram (12) by means of springs (20), (20), and a bolt-and-nut unit (21) extending transversely through the axial bore (12') of the ram (12) and fastening the springs (20), (20) and the washers (19), (19) together. |
