Sheet conveyance apparatus and image forming apparatus

A sheet conveyance apparatus comprising:

• a first conveyance portion configured to convey a sheet in a sheet conveyance direction;
• a first abutment member comprising a first abutment surface against which a leading edge, in the sheet conveyance direction, of the sheet conveyed by the first conveyance portion abuts, the first abutment member being configured to move from a standby position by being pressed by the leading edge of the sheet;
• a second conveyance portion configured to nip and convey the sheet conveyed by the first conveyance portion;
• a first urging member configured to urge the first abutment member toward the first standby position;
• a first rotary member supported rotatably on the first abutment member,
• a second abutment member comprising a second abutment surface against which the leading edge of the sheet conveyed by the first conveyance portion abuts, the second abutment member being disposed in a position which is different from the first abutment member in a width direction orthogonal to the sheet conveyance direction, and being configured to move from a second standby position by being pressed by the leading edge of the sheet;
• a second urging member configured to urge the second abutment member toward the second standby position;
• and
• a second rotary member supported rotatably on the second abutment member, the second rotary member being disposed in a position which is different from the first rotary member in the width direction,
• wherein the first abutment surface and the second abutment surface contact with the leading edge of the sheet conveyed by the first conveyance portion before the sheet is nipped by the second conveyance portion,
• wherein the second conveyance portion nips the sheet while the first abutment member and the second abutment member are moving from the first standby position and the second standby position respectively together with the first rotary member and the second rotary member by being pressed by the leading edge of the sheet,
• wherein the first rotary member and the second rotary member are in contact with the sheet being conveyed by the second conveyance portion after the leading edge of the sheet passes through the first abutment surface, the first rotary member, and the second abutment surface, and the second rotary member, and
• wherein the first abutment member and the second abutment member move toward the first standby position and the second standby position by the first urging member and the second urging member respectively after a trailing edge, in the sheet conveyance direction, of the sheet passing through the first rotary member and the second rotary member.