| 摘要 |
PROBLEM TO BE SOLVED: To prevent stacked sheets from being discharged with skew, and to discharge the sheets stably without reducing productivity even in mass printing.SOLUTION: A sheet S discharged by a conveyance roller R2 falls. A stacking part 34 arranged below the conveyance roller R2 receives the sheet S with a stopper 351 to stack it. A pair of aligning members 361, 362 are disposed so at both sides of the sheet S entering the stacking part 34, so as to reciprocate in a width direction orthogonal to the advancing direction of the sheet S, and come into contact with both lateral side end surfaces of the sheet S for alignment. The aligning members 361, 362 move from an initial position P0 for receiving the sheet S being conveyed by the conveyance roller R2 to a first alignment position P1 closer to both side edges SD of the sheet S than the initial position P0 and separated by a predetermined distance from both side edges SD, via a CD motor 366, when the sheet S discharged from the conveyance roller R2 drops. |
