Sheet conveyance apparatus, image forming apparatus and image forming system

A sheet conveyance apparatus comprising:

• a first moving unit including an abutment portion arranged on one side in a width direction with respect to a sheet being conveyed, and an obliquely conveying rotary member pair configured to obliquely convey the sheet toward the abutment portion;
• a second moving unit including a roller configured to convey the sheet, the second moving unit being configured to move a position of the sheet in a width direction orthogonal to a conveyance direction;
• a width position detection unit including a plurality of sensor chips aligned in the width direction, the width position detection unit being configured to detect a position of an edge portion of the sheet in the width direction;
• and
• a control unit configured to control the second moving unit according to a detection result of the width position detection unit,
• wherein each sensor chip constituting the plurality of sensor chips includes a plurality of light receiving elements aligned in the width direction,
• wherein, among the plurality of light receiving elements on the sensor chip, a first element is arranged closest to one side in the width direction,
• wherein, among the plurality of light receiving elements on the sensor chip, a second element is arranged closest to the other side in the width direction,
• wherein, with respect to all regular size sheets conveyable in the sheet conveyance apparatus, the control unit is configured to execute
• a process of abutting an edge portion of a regular size sheet against the abutment portion by the first moving unit so that the edge portion of the regular size sheet is positioned between the first element and the second element of one of the plurality of sensor chips, and
• a process of moving a position of the regular size sheet according to a position of the edge portion of the regular size sheet in the width direction detected by the width position detection unit in a state in which the edge portion of the regular size sheet abuts against the abutment portion.