Sheet conveyance device

A sheet conveyance device comprising:

• a stacker on which sheets fed one by one are sequentially stacked;
• a feeder that moves a sheet in a length direction and feeds the sheet to the stacker;
• a discharger that is located on a downstream side of the feeder in a sheet feeding direction and discharges the sheets stacked on the stacker;
• a lower conveyer that constitutes at least a part of a bottom of the stacker and applies a force to a lower side of the sheets stacked on the stacker to move the sheets in the length direction;
• a lifter that lifts and lowers at least an end of the lower conveyer on a side close to the feeder in at least three stages of a lower stage suitable for a case where a length of a handled sheet is a first length that is shorter than a distance from the feeder to the discharger, a middle stage suitable for a case where a length of a handled sheet is a second length that is longer than the first length, and an upper stage suitable for sheet discharging;
• an upper conveyer that faces the lower conveyer and applies a force to an upper side of the sheets pinched between the upper conveyer and the lower conveyer that is moved to the upper stage by the lifter, to move the sheets in the length direction;
• and
• a stopper that protrudes above the lower conveyer placed at the lower stage by the lifter and on which a downstream end in the sheet feeding direction of a sheet having the first length abuts, wherein
• the discharger includes a discharge port that discharges the sheets and a shutter member that moves to cause the discharge port to be in an open state and a closed state,
• the shutter member causes the discharge port to be in the open state when the lower conveyer is at the upper stage and causes the discharge port to be in the closed state when the lower conveyer is at the lower stage and the middle stage, and
• the shutter member positions a downstream end in the sheet feeding direction of a sheet having the second length when the lower conveyer is at the middle stage.