| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent increase in size and complication of a perforation processing device even when the number of perforation blades is increased.SOLUTION: A plurality of perforation blade heads 14 are mounted on a single feed screw 15 via a nut with a brake 17, and they can slide and move along a single slide guide 13. As a feed screw rotates in the normal/reverse directions while each nut with a brake being switched between a braking position and non-braking position, each perforation blade head reciprocates independently from each other, and is also kept in a stationary state. Prior to operation start of the device, a current position of each perforation blade head is detected by sensors 25-27, and based on the current position information and set position information, each perforation blade head can move automatically to the set position without colliding with each other.</p> |
