| 摘要 |
PROBLEM TO BE SOLVED: To accurately position-control a positional relationship between a cam and a punch member while making a failure of a drive part hardly occur in a drive mechanism which moves a plurality of the punch members to a punching direction.SOLUTION: When a cam plate moving up and down the plurality of punch members is reciprocally moved by a predetermined stroke, a cylindrical cam having a spiral cam groove is rotated by a driving motor, and a follower pin provided to a slide cam is engaged with the cam groove. When the cam plate is located at a left limit or right limit, an annular groove which rotates circumferentially is coupled to the spiral cam groove, and a stopper member which limits the circumferential movement of the follower pin is provided at a part of the annular groove. |
