SHEET FOLDING APPARATUS, SHEET FOLDING UNIT AND IMAGE FORMING APPARATUS

摘要

A sheet folding apparatus, including: a stacker configured to stack a plurality of sheets; a first folding roller configured to rotate around a first axis; a second folding roller configured to rotate around a second axis which is parallel with the first axis and biased to the first folding roller separably to make a nip together with the first folding roller therebetween; a blade unit configured to push a surface of the plurality of sheets, stacked by the stacker, into the nip; a stationary support configured to support the blade unit linearly movable to avoid deviating from a common tangential direction of the first folding roller and the second folding roller at the nip to a first folding roller side; and a movable support relatively movable against the blade unit, configured to bias the blade unit to the first folding roller side deviatably from the common tangential direction to a second folding roller side.