US 11,987,466 B2
Sheet processing apparatus and image forming system
Takao Izaki, Shizuoka (JP); Jun Agata, Shizuoka (JP); and Yasuhiro Nakahara, Kanagawa (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 20, 2022, as Appl. No. 17/724,926.
Claims priority of application No. 2021-076349 (JP), filed on Apr. 28, 2021.
Prior Publication US 2022/0348432 A1, Nov. 3, 2022
Int. Cl. B26F 1/06 (2006.01); B65H 35/00 (2006.01); B65H 43/00 (2006.01)
CPC B65H 35/0073 (2013.01) [B26F 1/06 (2013.01); B65H 43/00 (2013.01); B65H 2403/42 (2013.01); B65H 2403/72 (2013.01); B65H 2513/10 (2013.01); B65H 2801/06 (2013.01)] 22 Claims
OG exemplary drawing
 
5. The sheet processing apparatus comprising:
a first conveyance rotary member disposed in a first conveyance path and configured to convey a sheet in a sheet conveyance direction;
a second conveyance rotary member disposed in the first conveyance path and downstream of the first conveyance rotary member in the sheet conveyance direction and configured to convey the sheet;
a punch member disposed in the first conveyance path, between the first conveyance rotary member and the second conveyance rotary member in the sheet conveyance direction, and configured to perform punching on the sheet conveyed by the first conveyance rotary member while rotating;
a sensor disposed between the first conveyance rotary member and the punch member in the sheet conveyance direction and configured to change an output value based on presence or absence of the sheet at a detection position;
a punch motor configured to be driven based on a detection result of the sensor and drive the punch member;
a conveyance motor configured to drive the first conveyance rotary member and the second conveyance rotary member;
a first drive transmission portion including a first number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the first conveyance rotary member;
a second drive transmission portion including a second number of drive transmission members configured to sequentially transmit driving force of the conveyance motor to the second conveyance rotary member, the second number being larger than the first number;
a reversing portion configured to reverse the sheet received from the first conveyance path;
a stacking portion on which the sheet reversed by the reversing portion is stacked;
a second conveyance path extending below the first conveyance path and configured to receive the sheet reversed by the reversing portion and guide the sheet to the stacking portion;
a discharge portion configured to discharge the sheet to outside of the apparatus;
a third conveyance path extending from the stacking portion toward the discharge portion and configured to guide the sheet to the discharge portion; and
a rotary member pair disposed in the second conveyance path and configured to discharge the sheet to the stacking portion.