JP2009120331A5 - - Google Patents

Claims (5)

A sheet discharging means for discharging the sheet, a sheet stacking section for stacking the discharged sheets, and a position in the width direction of the sheet discharged to the sheet stacking section provided to be movable in the width direction orthogonal to the sheet discharging direction. A first alignment member and a second alignment member for aligning the first and second alignment members, and when stacking the next sheet bundle on the aligned sheet bundle in the width direction, the first alignment position is at the first reference position. after aligning the bundle of sheets by moving the second aligning member towards the first matching member, toward the second alignment member has been moved to the second reference position by moving the first alignment member the next sheet In the sheet stacking device that stacks the stacks of
When the first alignment member is located at the first reference position and is movable along the surface of the first alignment member in contact with the sheet, the second alignment member moves with the first alignment member. A first auxiliary alignment member that moves to a contact position that abuts against the moving sheet;
When the second alignment member is provided so as to be movable in the vertical direction along the surface of the second alignment member that contacts the sheet, and the second alignment member is at the second reference position, the first alignment member is moved. A sheet stacking apparatus comprising: a second auxiliary alignment member that moves to a contact position that abuts against a moving sheet.   When the first alignment member moves, the first auxiliary alignment member moves to a retracted position where it does not come into contact with the moving sheet as the first alignment member moves, and the second auxiliary alignment member 2. The sheet stacking apparatus according to claim 1, wherein when the second alignment member moves, the second alignment member moves to a retreat position where the second alignment member does not contact the moving sheet.   When aligning the sheet by moving both the first alignment member and the second alignment member, both the first auxiliary alignment member and the second auxiliary alignment member are moved to the retracted position. The sheet stacking apparatus according to claim 2. It said first reference position and the second reference position, the over preparative loading device according to any one of claims 1, wherein the moving 3 in accordance with the length in the width direction of the sheet.   An image forming unit that forms an image on a sheet, and a sheet stacking device according to any one of claims 1 to 4, further comprising a sheet stacking unit that stacks sheets discharged after image formation. An image forming apparatus.