| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a perforation device improving accuracy of the shape and position of cut-outs in a simple configuration, a post-processing apparatus equipped with the perforation device, and an image forming system connected with the post-processing apparatus. <P>SOLUTION: The perforation device includes a plurality of punches to perforate holes on a sheet by a reciprocation motion; a holding board to hold the punches in a line in the width direction of the sheet; a plurality of dies arranged opposing to the plurality of punches; two cranks arranged on and rotating together with a drive shaft, and arranged with respective angular phases being displaced with each other in the shaft rotating direction; and two connecting rods connecting with the two cranks and the holding board, in which differential perforation is carried out in such a manner that the rotation of the two cranks reciprocates the punches, and during perforating the cut-outs on the sheet, the holding board reciprocates with phases at both ends being displaced with each other, and the plurality of punches perforate the cut-outs with time difference from the punch at either end of the both ends to the punch at the other end successively. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
