Sheet processing device and image forming apparatus

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;
• a first 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;
• a second endless belt that circulates by way of the first surface side and the second surface side on the side opposite to the first surface of the processing tray;
• plural rollers over which the first endless belt and the second endless belt are stretched;
• a supporting member that is attached to the first endless belt and supports thereon the pile of sheets on the processing tray;
• and
• a first pressing member and a second pressing member that are attached to the second endless belt and align the sheets by pressing a rear end portion thereof in a feeding direction onto the first surface,
• wherein:
• the plural rollers include a first roller that reverses a circulation path of the second endless belt from the first surface side to the second surface side, and a second roller that is disposed at a specific interval from the first roller and reverses the circulation path from the second surface side to the first surface side;
• and
• the first pressing member and the second pressing member are attached to the second endless belt so as to form a state where the first pressing member is positioned in the vicinity of the first roller and on the second surface side and the second pressing member is positioned in the vicinity of the second roller and on the second surface side.

An image forming apparatus, comprising:

• an apparatus main body that applies image forming processing on a sheet;
• and
• a post-processing device that receives a sheet after completion of the image forming processing from the apparatus main body and applies specific post-processing on a pile of sheets made up of sheets that have been received and stacked,
• wherein the post-processing device includes:
• 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, and
• wherein:
• 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, and a second roller that is disposed at a specific interval from the first roller and reverses the circulation path from the second surface side to the first 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 positioned in the vicinity of the second roller and on the second surface side.