POSTPROCESSING APPARATUS, AND IMAGE FORMING APPARATUS AND IMAGE FORMING SYSTEM INCLUDING THE POSTPROCESSING APPARATUS

摘要

A postprocessing apparatus includes a stacking unit that stacks a sheet, an abutting unit that corrects a conveying direction of the sheet, a return roller that abuts the sheet against the abutting unit, a shift conveying unit that shifts the sheet in a width direction, and a width direction detector that detects a width direction position of the sheet. When the sheet is shifted by the shift conveying unit by a predetermined amount, passed to the return roller, and abutted against the abutting unit, distances A and B are nearly the same, where the distance A is a distance from a conveying direction position of a side of the sheet to a rear end of the sheet and the distance B is a distance from the return roller to the abutting unit.

主权项

1. A postprocessing apparatus, comprising:
a stacking unit configured to stack and process a sheet; an abutting unit that is provided on the stacking unit and configured to abut a rear end of the sheet to correct a conveying direction of the sheet; a conveying unit comprising a rotating body that conveys the sheet to abut the sheet against the abutting unit on the stacking unit; a shift conveying unit that is provided at an upstream side of the stacking unit and configured to shift the sheet in a width direction and conveys the sheet; and a width direction detector configured to detect a width direction position of the sheet, wherein when the sheet is shifted by the shift conveying unit by a predetermined amount until a side of the sheet is detected by the width direction detector, conveyed onto the stacking unit, passed to the conveying unit, and abutted against the abutting unit, distances A and B are nearly the same, where the distance A is a distance from a conveying direction position of the side of the sheet detected by the width direction detector to the rear end of the sheet and the distance B is a distance from the conveying unit on the stacking unit to the abutting unit.