| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily attach and detach a punch guide to/from a retainer while hiding engagement projections in the inside of the punch guide. <P>SOLUTION: Engagement projections 1b are projectingly formed on a cylindrical inner peripheral surface 1a in the retainer 4 side of the punch guide 1, so that the engagement projections 1b are arranged on the cylindrical inner peripheral surface 1a in an unexposed state. Communication passages 4d are formed on a cylindrical outer peripheral surface 4c of the retainer 4 and a circumferential groove 4e which communicates in the axial direction of the punch guide 1 is formed in the communication passages 4d so that the communication passages 4d and the circumferential groove 4e are arranged on the cylindrical outer peripheral surface 4c in an exposed state. <P>COPYRIGHT: (C)2012,JPO&INPIT |
