Patent ID: 8733751

Claim:
A sheet folding device, comprising a sheet transporting path of moving a sheet sent from a carry-in port to a carrying-out port, a folding path branched from the sheet transporting path, performing a folding processing of the sheet from the carry-in port, a folding part disposed in the folding path, folding to match the sheet, a sheet stacking part of stacking the folded sheets from the folding part, a sheet discharging path of discharging the folded sheet sent from the folding part to the sheet stacking part, and a guiding wall of guiding the folded sheet sent from the sheet discharging path to the sheet stacking part, and wherein the guiding wall is structured in a manner of guiding the folded sheet discharged in a first sheet discharging direction almost crossing with the direction of folding the sheet from the sheet discharging path, the sheet stacking part has a stacking face inclining in a manner that the downstream side in the second sheet discharging direction is lower than the upstream side in the second sheet discharging direction, the inclined stacking face is composed of a first supporting face of supporting the stacked sheet at its front part, and a second supporting face of supporting the stacked sheet at its rear part, the first supporting face has a registration part of regulating the sheet at its front end, and the length from one end to the other end is shorter than ½ of the sheet minimum size length, and the first supporting face is rotatably provided toward upward around a rotating shaft provided to the registration part.