Patent ID: 7661666
Filing Date: 2010-02-16
Classification: G03G

Abstract:
1. A sheet processing apparatus having a sheet post-processing unit for performing a post process such as aligning or binding sheets comprising: a tray to support a sheet bundle; an auxiliary conveying unit including a first arm to hook an end of the sheet bundle on the tray to move the first arm, thereby conveying the sheet bundle to a predetermined position on the tray, and return the first arm from the predetermined position to a home position; a main conveying unit having a second arm to take over the sheet bundle from the first arm at the predetermined position on the tray and hook an end of the sheet bundle to move the second arm, convey the sheet bundle taken over, and discharge the sheet bundle from the tray; a single drive source connected to the auxiliary conveying unit and main conveying unit to drive the auxiliary conveying unit and main conveying unit; a clutch body installed between the drive source and the auxiliary conveying unit to transfer drive force of the drive source to the auxiliary conveying unit before the first arm reaches the predetermined position as a taking-over position from the main conveying unit and interrupt the drive force for the auxiliary conveying unit when the first arm reaches the predetermined position; and an elastic body joined to the auxiliary conveying unit and deformed elastically during transfer of the drive force to the auxiliary conveying unit by the clutch body to act elastic recovery force when the drive force is interrupted, thereby returning the first arm to the home position.