Patent ID: 7992864

Claim:
A sheet processing device that applies specific processing on a pile of sheets, comprising: a processing tray that is provided with a first surface to receive sheets successively fed therein and forms the pile of sheets in a stacked state; an endless belt that circulates by way of a first surface side and a second surface side on a side opposite to the first surface of the processing tray; plural rollers over which the endless belt is stretched; and a first abutting member and a second abutting member that are attached to the endless belt and allowed to abut on an end edge portion of the pile of sheets, wherein: a circulation path of the endless belt is set longer on the second surface side than on the first surface side; the plural rollers include a first roller that reverses a circulation path of the endless belt from the first surface side to the second surface side, a second roller that is disposed below the first roller with a specific interval from the first roller and reverses the circulation path from the second surface side to the first surface side and a third roller that is disposed below the second surface side; and the first abutting member and the second abutting member are attached to the endless belt so as to form a state where the first abutting member is positioned in the vicinity of the first roller and on the second surface side and the second abutting member is disposed between the second and third rollers and spaced from the second and third rollers.