Sheet conveying apparatus and image forming system including the same

An image forming system, comprising:

• an image forming unit configured to form an image on a sheet;
• and
• a sheet conveying apparatus configured to convey a plurality of sheets conveyed from the image forming unit,
• the sheet conveying apparatus comprising:
• a pair of rollers configured to nip and convey the plurality of sheets in a predetermined direction, the plurality of sheets being overlaid on top of each other, the plurality of sheets including a first sheet and a second sheet, the first sheet being located undermost among the plurality of sheets, the second sheet being different from the first sheet, and an upstream edge of the first sheet being located downstream of an upstream edge of the second sheet in the predetermined direction when the pair of rollers is conveying the plurality of sheets;
• a placement portion on which the plurality of sheets conveyed by the pair of rollers is placed;
• a support portion configured to support the second sheet when the first sheet is located at a position at which the first sheet is placeable on the placement portion;
• a support member configured to be movable to a first position and to a second position, a downstream end, with respect to the predetermined direction, of the support member being located, in a case where the support member is located at the first position, downstream, with respect to the predetermined direction, of a downstream end, with respect to the predetermined direction, of a support area at which the support portion supports the second sheet, the downstream end of the support member being located, in a case where the support member is located at the second position, upstream, with respect to the predetermined direction, of the downstream end of the support member which is located at the first position, a first state being a state that the support member is located at the first position to support a lower surface of the second sheet without supporting a lower surface of the first sheet, a second state being a state that the support member is located at the second position not to support the lower surface of the first sheet which has passed through a nip in which the pair of rollers nip sheets;
• and
• a control portion configured to, in a state in which the upstream edge, with respect to the predetermined direction, of the first sheet has passed through the nip and the second sheet is being nipped by the pair of rollers, bring the support member into the second state in which the support member is located at the second position, and after bringing the support member into the second state, bring the support member into the first state in which the support member is located at the first position.