| 摘要 |
PROBLEM TO BE SOLVED: To successively perform trough folding and successively perform crest folding in addition to zigzag folding in a prior art.SOLUTION: In a sheet folding apparatus, a sheet folded part folded by a first or second folding roller pair 6 or 7 is guided to the oppositely arranged first or second folding roller pair, the sheet folded part is detected by a first or second sensor 8 or 9, a sheet conveying direction and a sheet conveying distance are controlled based on the detected result, the timing of conveying of the sheet by the first or second folding roller pair and the timing of an operation of a first or second sheet guiding member 4 or 5 are aligned, and the sheet P is folded while being held and conveyed by the first or second folding roller pair therebetween. |
