Apparatus for processing sheets and apparatus for forming images provided with the apparatus

A sheet processing apparatus comprising:

• a placement tray adapted to place sheets to undergo binding processing;
• a bind unit adapted to be able to shift along an end edge of sheets on the placement tray and bind a plurality of the sheets as a single bunch;
• and
• an alignment member adapted to align a position of the sheets on the placement tray to be bound by the bind unit in a shift direction of the bind unit
• wherein in the bind unit, a needle bind unit for performing binding processing on the bunch of sheets with a needle and a needleless bind unit for performing binding processing without a needle are provided together in the shift direction of the bind unit, and a length of the needleless bind unit is shorter than a length of the needle bind unit in the shift direction of the bind unit.

A sheet processing apparatus comprising:

• a placement tray adapted to place sheets to undergo binding processing;
• and
• a bind unit adapted to be able to shift along an end edge of sheets on the placement tray and bind a plurality of the sheets as a single bunch,
• wherein in the bind unit, a needle bind unit for performing binding processing on the bunch of sheets with a needle and a needleless bind unit for performing binding processing without a needle are provided together in a shift direction of the bind unit,
• a length of the needleless bind unit is shorter than a length of the needle bind unit in the shift direction of the bind unit, and
• the bind unit is provided with a common drive motor to selectively perform binding processing with the needle bind unit and binding processing with the needleless bind unit.

A sheet processing apparatus comprising:

• a placement tray adapted to place sheets to undergo binding processing;
• and
• a bind unit adapted to shift along an end edge of sheets on the placement tray,
• wherein in the bind unit, a needle bind unit for performing binding processing on a bunch of the sheets with a needle and a needleless bind unit for performing binding processing without a needle are provided together in a shift direction of the bind unit,
• the bind unit includes a common drive motor to selectively perform the binding processing with the needle bind unit and the binding processing with the needleless bind unit corresponding to a shift position of the bind unit, and the drive motor is disposed in the needle bind unit.