Sheet post-processing apparatus that carries out stapling process on sheet bundle and control method therefor

摘要

A sheet post-processing apparatus which is capable of preventing a stapling position and a folding position from being out of alignment when a stapling process is carried out. A sheet bundle, which is stacked in a housing guide, is stapled by a stapler using a staple at the stapling position. The sheet bundle is folded at a position of the staple after the stapling. After the stapling, the sheet bundle is moved from the stapling position to the folding position. During the movement, the staple is detected using a staple sensor disposed at a predetermined location between the stapling position and the folding position. Based on a moving distance of the sheet bundle before the staple is detected after the stapling process, a position of the sheet bundle with respect to the stapler for stapling on a subsequent sheet bundle is corrected.

主权项

1. A sheet post-processing apparatus that carries out a stapling process on a plurality of sheets, comprising:
a sheet stacking unit configured to have the plurality of sheets stacked thereon as a sheet bundle; a sheet stapling unit configured to stapling the sheet bundle, stacked on said sheet stacking unit, using a binding needle at a stapling process position at which the stapling process is carried out; a folding process unit configured to, after the stapling process, carry out a folding process in which the sheet bundle is folded at a position of the binding needle; a binding needle detection unit configured to be disposed at a predetermined location between the stapling process position and a folding process position at which the folding process is carried out, and detect the binding needle; a sheet bundle moving unit configured to move the sheet bundle from the stapling process position to the folding process position; and a correction unit configured to, based on a moving distance of the sheet bundle before the binding needle is detected by said binding needle detection unit after the stapling process by said sheet stapling unit, corrects a position of a subsequent sheet bundle with respect to said sheet stapling unit in the stapling process for the subsequent sheet bundle.