Sheet processing apparatus

A conveying apparatus, comprising:

• a regulating portion configured to regulate an opening of a folded sheet bundle conveyed in a conveying direction;
• a conveying belt configured to convey the folded sheet bundle placed thereon in the conveying direction toward the regulating portion in the state that a folded portion of the folded sheet bundle is located at a downstream end in the conveying direction;
• a conveying portion configured to convey the folded sheet bundle by pushing a rear end of the folded sheet bundle from an upstream side in the conveying direction;
• and
• a pinch conveying portion which pinches and conveys the folded sheet bundle and is disposed downstream of the regulating portion in the conveying direction,
• wherein the regulating portion is provided above the conveying belt, and
• wherein the conveying portion pushes the rear end of the folded sheet bundle on the driven conveying belt at a conveying speed that is higher than a conveying speed of the driven conveying belt or the rear end of the folded sheet bundle on the stopped conveying belt, in the state that the opening of the folded sheet bundle is regulated by the regulating portion, so that the pinch conveying portion pinches the downstream end of the folded sheet bundled.