| 摘要 |
<p>A quick-extraction punch-holder adaptor 1 for converting punching machines from a single-punch to a multiple-punch configuration comprises a cylindrical body which is crossed by a plurality of receptacles 4 for slidingly accommodating each punch 2 with axes which are parallel to the axis of said cylindrical body, at the end of which a selection means is rotatably mounted, the selection means being provided, on its lower face, with a tooth 6 for contact with the head of each selected punch and being engageable with a motor means for angularly controlled rotation, which is associated with the conventional turret of a punching machine, elastic means being circumferentially interposed between the selection means and the cylindrical body, the elastic means being loadable by compression and being meant to contrast the active stroke and produce the return of the punches.</p> |
