Sheet discharge device and image forming apparatus

A sheet discharge device which sorts discharged sheets for each copy, the sheet discharge device comprising:

• a conveyance member conveying a sheet in a predetermined conveyance direction;
• a discharge member shiftable in a width direction crossing to the conveyance direction and discharging the sheet conveyed from the conveyance member to a discharge tray;
• a shift part configured to shift the discharge member in the width direction;
• and
• a control part configured to carry out a sort processing where the sheet conveyed from the conveyance member is alternately discharged to a first offset position and a second offset position for each copy, the first offset position being separated from a reference discharge position by a first distance in a first direction and the second offset position being separated from the reference discharge position by the first distance in a second direction opposite to the first direction in the width direction, wherein
• in a case where the sheet is discharged to the first offset position,
• the control part shifts the discharge member to a first reception position separated from a home position in the second direction by a second distance shorter than the first distance, shifts the discharge member to a first discharge position separated from the first reception position in the first direction by the first distance after the sheet is received by the discharge member, and then discharges the sheet to the first offset position, and
• in a case where the sheet is discharged to the second offset position,
• the control part shifts the discharge member to a second reception position separated from the home position in the first direction by the second distance, shifts the discharge member to a second discharge position separated from the second reception position in the second direction by the first distance after the sheet is received by the discharge member, and then discharges the sheet to the second offset position.