SHEET POST-PROCESSING DEVICE AND IMAGE FORMING APPARATUS THEREWITH

摘要

PROBLEM TO BE SOLVED: To form a sheet post-processing being as small in size as possible in a sheet conveying direction and to carry out accurate post-processing by stabilizing the attitude of a bundle of sheets when post-processing the bundle of sheets placed across an intermediate tray and a stacking tray. SOLUTION: The sheet post-processing device is provided with an ejecting means 6 for ejecting sheets; a single sheet corner support means 10 for supporting one corner of each sheet ejected by the ejecting means 6; a sheet storage means 9 provided below the support means 10 and having a larger area than the support means; and a post-processing means 23 for post-processing the sheets placed across the support means 10 and the storage means 9.