Sheet bending apparatus and stapling apparatus

A stapling apparatus which staples stacked sheets in a standing state, the apparatus comprising:

• an information obtaining section that obtains a sheet information indicating the type of the sheets;
• a sheet moving member that includes an abutting section capable of abutting the bottom edges of the sheets stacked in a standing state and of freely moving vertically and vertically moves the stacked sheets by causing the abutting section to move vertically;
• a stapler that is disposed within a range of movement of the stacked sheets moved by the sheet moving member and has a staple feeding opening for feeding a staple by holding the stacked sheets and staples the stacked sheets by causing the staple feeding opening to hold a predetermined position of the sheets moved by the sheet moving member, the predetermined position of the sheets being in the vertical direction of the sheets;
• and
• a controlling section that controls an amount of movement of the abutting section according to the type of the sheets indicated by the sheet information obtained in the sheet information obtaining section so as to allow the staple feeding opening to hold the predetermined position of the stacked sheets.