| 摘要 |
PROBLEM TO BE SOLVED: To provide a post-processing device and an image formation system capable of minutely displacing position of an end part of a recording sheet that is sequentially fed from an image formation device for each record sheet.SOLUTION: A post-processing device 3 is a device that performs post-processing by accumulating a paper P discharged from an image formation device 2. The post-processing device 3 includes stack means 23, a stopper 50, a motor 52, and a folding knife 36. The stack means 23 accumulates and houses a plurality of sheets of paper P. The stopper 50 is movable, and stops the paper P that has advanced to the stack means 23. The motor 52 drives the stopper 50. An angle &bgr; of the contact angle formed between a surface A1 of the stopper 50 to which a tip end of the paper P contacts and normal direction d2 of the record sheet is variable by rotating the stopper 50 by the motor 52. |
