Patent ID: 7866650

Claim:
A sheet processing apparatus that includes a conveying unit that conveys a sheet and a tray where a carried sheet is stacked, the sheet processing apparatus comprising: an aligning unit that aligns a front end of a sheet bundle stacked in the tray in a discharging direction; and a sheet bundle conveying unit that holds a rear end of the sheet bundle and conveys the sheet bundle in the discharging direction, wherein: the aligning unit is arranged to be retracted from a conveying path of the sheet bundle after aligning the front end of the sheet bundle and arranged to come out of the conveying path of the sheet bundle behind the sheet bundle conveying unit after a movement of the sheet bundle conveying unit, the aligning unit is mounted on a first endless conveying belt stretched in the conveying path of the sheet bundle, the sheet bundle conveying unit is mounted on a second endless conveying belt stretched in the conveying path of the sheet bundle, the aligning unit is mounted in a freely swiveling manner in the conveying direction of the sheet bundle, and includes a pressing unit that presses the front end of the sheet bundle in a direction opposite to the conveying direction of the sheet bundle, the aligning unit includes a support for supporting the front end of the sheet bundle, the support further includes a front end tapper and disposed to freely swivel around a supporting point, and the pressing unit is disposed between the support and the front end tapper.