Sheet post-processing apparatus and image forming apparatus

Abstract

A sheet post-processing apparatus includes: an accumulating unit accumulating a sheet having been conveyed; a center-folding unit folding a central portion, in a conveying direction in which the sheet is conveyed, of the sheet, which has been accumulated by the accumulating unit, and a pressing force moving unit that applies a pressing force to the sheet, which has been folded by the center-folding unit, and moves a portion, at which the pressing force is applied, on the sheet in the conveying direction.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Japanese Patent Application No. 2010-201850 filed in Japan on September 9, 2010 and Japanese Patent Application No. 2011-145945 filed in Japan on June 30, 2011, and the entire contents thereof are hereby incorporated by reference. technical field [0003] The present invention relates to a sheet post-processing apparatus that performs post-processing such as sorting and stapling, and an image forming apparatus including the sheet post-processing apparatus. Background technique [0004] As a method of reducing the height of the folded portion of saddle stitching and center folding in a sheet post-processing apparatus that performs post-processing such as sorting and binding, known (as disclosed in Japanese Patent Application Laid-Open No. 2003-182928) A mechanism for setting sheets discharged from an image forming apparatus in an accumulating unit and center-folding a saddle-stitch...

AI Technical Summary

Problems solved by technology

Therefore, the structure disadvantageously becomes complicated, increases in size and increases in cost

[0007] The mechanism in Japanese Patent Application Laid-Open No. 2010-006602 is a mechanism for applying pressure to a bundle of sheets, which is pressed from above and below after the sheets are folded into two, and therefore, this mechanism also disadvantageously increases in size and high cost

Also, in increasing the folding strength, pressing pressure is applied everywhere on the bundle of sheets folded in two, so that the pressure is dispersed to require a long pressing time and increase the number of times of pressing, which disadvantageously reduces productivity.

Images