| 摘要 |
PROBLEM TO BE SOLVED: To improve loading of Z-folding paper in a stacker tray by properly crushing the Z-folding paper which is loaded in the stacker tray and has risen upward.SOLUTION: There are provided a stacker tray 72 on which a folded paper is loaded for vertical movement, a top tray 74 which is provided above the stacker tray 72, to perform further rotational action upward, being arranged under own weight, and a swelling detection sensor 76 which recognizes a predetermined height of a Z-folding paper that is loaded in the stacker tray 72. By recognizing the height of the Z-folding paper with the swelling detection sensor 76, the stacker tray 72 is moved upward, so that the Z-folding paper loaded in the stacker tray 72 is pressurized toward the top tray 74, to crush a folding part of the Z-folding paper. |
