Sheet conveyance apparatus and image forming apparatus

A sheet conveyance apparatus comprising:

• a first roller pair configured to convey a sheet;
• a second roller pair disposed downstream of the first roller pair in a sheet conveyance direction and configured to convey the sheet;
• an abutment portion against which an edge portion of the sheet in a sheet width direction orthogonal to the sheet conveyance direction is abutted;
• an oblique feeder disposed downstream of the second roller pair in the sheet conveyance direction and configured to move the sheet toward the abutment portion in the sheet width direction while moving the sheet downstream in the sheet conveyance direction and convey the sheet while causing the edge portion of the sheet to abut against the abutment portion;
• a detector configured to detect a position of the sheet in the sheet width direction;
• a first driver configured to move the first roller pair in the sheet width direction;
• a second driver configured to switch a state of the second roller pair between a contact state and a separation state, the contact state being a state where rollers of the second roller pair are in contact with each other, the separation state being a state where the rollers are separated from each other;
• and
• a control portion configured to control the first driver and the second driver,
• wherein the control portion is configured such that
• in a case where a first sheet whose length in the sheet conveyance direction is a first length is conveyed, the control portion causes the first driver to move the first roller pair in the sheet width direction based on a detection result by the detector in a state in which the second roller pair is in the separation state, and then causes the first sheet conveyed by the first roller pair to reach the oblique feeder in a state in which the second roller pair is in the separation state, and
• in a case where a second sheet whose length in the sheet conveyance direction is a second length shorter than the first length is conveyed, the control portion causes the first driver to move the first roller pair in the sheet width direction based on a detection result by the detector in a state in which the second roller pair is in the contact state, and then causes the second sheet conveyed by the second roller pair to reach the oblique feeder.