Sheet conveyance apparatus and image forming apparatus

A sheet conveyance apparatus comprising:

• a rotary member pair configured to nip and convey a sheet in a sheet conveyance direction;
• a first actuator configured to move the rotary member pair, nipping the sheet, in a width direction orthogonal to the sheet conveyance direction, the width direction including a first direction from one side in the width direction toward the other side, and a second direction which is opposite to the first direction;
• an abutment member arranged downstream of the rotary member pair in the sheet conveyance direction, the abutment member including an abutment surface that extends along the sheet conveyance direction and that is configured to be in contact with a downstream edge of the sheet in the first direction;
• a second actuator configured to move the abutment member in the width direction;
• an obliquely conveying portion that is arranged downstream of the rotary member pair in the sheet conveyance direction and that conveys the sheet in the first direction while conveying the sheet in the sheet conveyance direction such that the downstream edge approaches the abutment surface;
• a detector that is arranged upstream of the obliquely conveying portion in the sheet conveyance direction and that detects a position of the downstream edge;
• and
• a control unit configured to control the first actuator and the second actuator,
• wherein the control unit is configured to execute
• (1) a third mode of controlling the first actuator such that the rotary member pair is moved in the width direction based on a detection result of the detector in a state where the sheet is nipped by the rotary member pair and before the sheet arrives at the obliquely conveying portion, and
• (2) a fourth mode of controlling the second actuator such that the abutment member is moved in the first direction regardless of the detection result of the detector before the sheet reaches the obliquely conveying portion.

A sheet conveyance apparatus comprising:

• a rotary member pair configured to nip and convey a sheet in a sheet conveyance direction;
• a first actuator configured to move the rotary member pair, nipping the sheet, in a width direction orthogonal to the sheet conveyance direction, the width direction including a first direction from one side in the width direction toward the other side, and a second direction which is opposite to the first direction;
• an abutment member arranged downstream of the rotary member pair in the sheet conveyance direction, the abutment member including an abutment surface that extends along the sheet conveyance direction and that is configured to be in contact with a downstream edge of the sheet in the first direction;
• a second actuator configured to move the abutment member in the width direction;
• an obliquely conveying portion that is arranged downstream of the rotary member pair in the sheet conveyance direction and that conveys the sheet in the first direction while conveying the sheet in the sheet conveyance direction such that the downstream edge approaches the abutment surface;
• a detector that is arranged upstream of the obliquely conveying portion in the sheet conveyance direction and that detects a position of the downstream edge;
• and
• a control unit configured to execute, before the sheet arrives at the obliquely conveying portion,
• (1) a first processing of controlling the first actuator such that the rotary member pair, nipping the sheet, is moved in the width direction based on a detection result of the detector,
• (2) a second processing of controlling the second actuator such that the abutment member is moved in the width direction based on the detection result of the detector,
• (3) a third processing of controlling the first actuator such that the rotary member pair, nipping the sheet, is moved in the second direction regardless of the detection result of the detector, and
• (4) a fourth processing of controlling the second actuator such that the abutment member is moved in the first direction regardless of the detection result of the detector,
• wherein the control unit is configured to execute a fifth mode in which at least either one of the first processing and the second processing is executed, and execute a sixth mode in which at least either one of the third processing and the fourth processing is executed.