| abstract |
A sheet finisher includes: a sheet stacking section on which sheets are stacked; a pair of folding rollers for pressing and conveying the sheets; a roller driving device for driving the pair of folding rollers; a protruding member which is protruded toward a nipping position of the pair of folding rollers to fold the sheets stacked on the sheet stacking section in two; and a protruding member driving device for driving the protruding member to protrude toward the nipping position. When the protruding member driving device drives the protruding member toward the nipping position, the roller driving device is suspended to drive the pair of folding rollers to be conveyed. |