Sheet stacking device including turnable anti-slip stopper and post-processing device

A sheet stacking device comprising:

• a conveyance part including a tray on which sheet stacks discharged from a discharge part at predetermined time intervals are stacked, and a conveyance member which conveys the sheet stack on the tray along a predetermined conveyance direction;
• and
• a stopper provided on a downstream side of the tray in the conveyance direction and preventing the sheet stack from falling from the tray, wherein
• the stopper has:
• a main plate inclined upward toward the downstream side with respect to the tray, the main plate having a contact face coming into contact with the sheet stack and a bent face bent downward from a tip end on the downstream side of the contact face so as to retract from the contact face;
• and
• at least one anti-slip member provided from a downstream side end portion of the contact face to the bent face and having a frictional coefficient with the sheet stack larger than the contact face, wherein
• the at least one anti-slip member includes two anti-slip members, and
• the two anti-slip members are disposed at both end portions of the stopper in a width direction perpendicular to the conveyance direction, and
• the main plate has a plurality of ribs protruding upward from the contact face and extending along the conveyance direction at intervals in the width direction, and
• an upper face of the anti-slip member is lower than an upper face of the plurality of ribs.