| 摘要 |
<p>A sheet stacking apparatus (500) is provided which comprises a first discharge unit (510) configured to discharge a sheet; a first stacking unit (515) on which the sheet discharged by the first discharge unit is stacked; a second discharge unit (514) disposed below the first discharge unit and configured to discharge a sheet; a second stacking unit (516) on which the sheet discharged by the second discharge unit is stacked; a first elevating unit (M4) configured to elevate the first stacking unit; an alignment unit (518) configured to align a position of the sheet being stacked on the second stacking unit in a width direction perpendicular to a sheet discharging direction; a moving unit (M3) configured to move the alignment unit to one of an alignment position where a sheet is to be aligned, a retracting position retracted above the alignment position and an intermediate retracting position between the alignment position and the retracting position; a determining unit (S8, S6) configured to determine a position of the first stacking unit in a vertical direction; and a control unit (630) configured to control the moving unit based on a determination of the determining unit.</p> |
