US 12,134,533 B2
Sheet storage device and image forming apparatus
Yasuaki Matsumoto, Shizuoka (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 6, 2022, as Appl. No. 17/833,218.
Claims priority of application No. 2021-096223 (JP), filed on Jun. 8, 2021.
Prior Publication US 2022/0388792 A1, Dec. 8, 2022
Int. Cl. B65H 1/04 (2006.01); B65H 1/02 (2006.01)
CPC B65H 1/04 (2013.01) [B65H 1/022 (2013.01); B65H 1/027 (2013.01); B65H 2405/1122 (2013.01); B65H 2405/1124 (2013.01); B65H 2511/11 (2013.01); B65H 2801/06 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A sheet storage device comprising:
a sheet storage unit configured to store sheets;
a regulating unit disposed in the sheet storage unit, and configured to regulate a position of a rear edge portion of the sheets in a conveyance direction for the sheets, wherein the regulating unit includes a pressing portion having a pressing surface configured to press the rear edge portion, a supporting portion configured to support the pressing portion, and an urging member configured to urge the pressing portion to cause the pressing surface to press the sheets; and
a lifting unit configured to lift a front edge portion of the sheets in the conveyance direction,
wherein, in the pressing surface, a position to be in contact with lower sheets is a pressing surface lower portion, and a position to be in contact with upper sheets located higher than the lower sheets is a pressing surface upper portion,
wherein, depending on a quantity of the sheets stored in the sheet storage unit, the pressing surface is capable of taking a first state and a second state in a state where the lifting unit lifts the front edge portion of the sheets so that the pressing surface is (i) in the first state when the quantity of the sheets stored in the sheet storage unit is a first quantity and (ii) in the second state when the quantity of the sheets stored in the sheet storage unit is a second quantity, and
wherein, in a case where a direction parallel to a horizontal direction and toward a downstream side in the conveyance direction is a pressing direction, the pressing surface upper portion is located downstream from the pressing surface lower portion in the pressing direction when the pressing surface is in the first state, and the pressing surface lower portion is located downstream from the pressing surface upper portion in the pressing direction when the pressing surface is in the second state.