US 11,905,138 B2
Sheet conveyance device and image forming apparatus equipped with sheet conveyance device
Yuta Suzuki, Ibaraki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 4, 2021, as Appl. No. 17/519,144.
Claims priority of application No. 2020-194811 (JP), filed on Nov. 25, 2020.
Prior Publication US 2022/0162025 A1, May 26, 2022
Int. Cl. B65H 5/06 (2006.01); B65H 29/58 (2006.01); B65H 9/16 (2006.01); B65H 9/00 (2006.01)
CPC B65H 5/062 (2013.01) [B65H 9/006 (2013.01); B65H 9/166 (2013.01); B65H 29/58 (2013.01); B65H 2301/331 (2013.01); B65H 2404/1441 (2013.01); B65H 2513/10 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A sheet conveyance device comprising:
a pair of first conveyance rollers that nip and convey a sheet;
a pair of second conveyance rollers that are arranged downstream of the first conveyance rollers in a sheet conveyance direction and that nip and convey the sheet;
a pair of registration rollers that are arranged downstream of the second conveyance rollers in the sheet conveyance direction and that nip and convey the sheet after correcting skew of the sheet by abutting a leading end of the sheet to the registration rollers;
a switching portion that switches a state of the second conveyance rollers between a contact state where the second conveyance rollers are in contact and a separated state where the second conveyance rollers are separated; and
a control unit configured to control the first conveyance rollers, the second conveyance rollers, the registration rollers, and the switching portion,
wherein the control unit switches a conveyance operation between a first conveyance operation and a second conveyance operation and executes the first conveyance operation or the second conveyance operation,
wherein in the first conveyance operation, the registration rollers start rotating to convey the sheet of which the skew has been corrected by the first conveyance rollers and the registration rollers, the second conveyance rollers are in the separated state, and a sheet conveyance speed by the registration rollers is higher than a sheet conveyance speed by the first conveyance rollers, and
wherein in the second conveyance operation, the registration rollers start rotating to convey the sheet of which the skew has been corrected by the first conveyance rollers and the registration rollers, the second conveyance rollers are in the separated state, and the sheet conveyance speed by the registration rollers is lower than the sheet conveyance speed by the first conveyance rollers.