Sheet-stapling apparatus and image-forming apparatus using the same

摘要

A sheet-stapling apparatus (500) mounts a center-fold booklet (100) and staples the booklet at a fold (10a) of the booklet (10) by a staple (55). The sheet-stapling apparatus has a supporting member (502) that mounts the center-fold booklet (10), a pushing member (503) that pushes the booklet to the supporting member, a stapler (504) that penetrates the staple through the booklet and a clincher (505) that clinches legs of the staple to bind the booklet. The pushing member (503) has a groove (531) that pushes the fold of the booklet and maintains the fold of the booklet at a pushing angle. The supporting member (502) forms the space between the clincher (505) and the booklet (10).