Sheet discharge apparatus and image forming apparatus

An image forming apparatus comprising:

• an image forming section configured to form an image on a sheet;
• a discharge unit configured to nip the sheet on which the image is formed by the image forming section at a nipping portion and discharge the sheet in a sheet discharge direction;
• a sheet support unit configured to support the sheet discharged from the discharge unit;
• a rotation member having a first abutting portion positioned above the sheet support unit, wherein the rotation member is configured to rotate about an axial line when the first abutting portion is pressed by the sheet;
• a detection unit configured to detect a position of the rotation member;
• a pressing member having a second abutting portion configured to abut against the sheet at a position downstream from a position at which the discharge unit nips the sheet and upstream from the first abutting portion in the sheet discharge direction;
• and
• a curving member configured to curve the sheet discharged by the discharge unit as viewed from a downstream side in the sheet discharge direction,
• wherein the curving member curves the sheet by pressing a part of the sheet being nipped by the nipping portion of the discharge unit downward such that the part of the sheet pressed by the curving member is positioned below the nipping portion,
• wherein the pressing member is provided rotatably independent of the rotation member and is configured to press the sheet discharged from the discharge unit downward, regardless of the position of the rotation member,
• wherein a length of the pressing member is shorter than a length of the rotation member in a direction perpendicular to the axial line, and
• wherein both of the second abutting portion and the curving member are provided at a center of the discharge unit in a sheet widthwise direction that is perpendicular to the sheet discharge direction.