Sheet folding device, image forming apparatus, and sheet folding method

摘要

A sheet folding device for performing single-sheet folding and multi-sheet folding with a single feed path, the device including: a conveying unit that conveys a sheet; a restraining unit that stops a leading edge of the sheet; a pair of folding rollers that fold the sheet; and a guiding member that guides a bend of the sheet to a nip between the pair of folding rollers, wherein the guiding member is positioned at different sheet-guiding positions for single-sheet folding and multi-sheet folding.

主权项

1. A sheet folding device for performing single-sheet folding and multi-sheet folding with a single feed path, the device comprising:
a conveying unit that conveys a sheet; a restraining unit that stops a leading edge of the sheet; a pair of folding rollers that fold the sheet; a guiding member that guides a bend of the sheet to a nip between the pair of folding rollers, wherein the guiding member is positioned at different sheet-guiding positions for single-sheet folding and multi-sheet folding; a driving unit that makes the guiding member advance and retreat with respect to the pair of folding rollers; and a control unit that controls the driving unit, wherein the control unit is configured to,
acquire information indicating whether the single-sheet folding or the multi-sheet folding is performed,control the position of the guiding member so that a gap between the pair of folding rollers and the guiding member during the multi-sheet folding becomes larger than the gap during the single-sheet folding, prior to the sheet passing through the gap, andpass the sheet through the gap, after controlling the position of the guiding member.