Sheet feeding apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorMasatoshi Takiguchi
Life of this patent
Estimating the term…
Abstract
A link member is rotatably supported by a lifting plate. When the lifting plate moves upward and downward, the movement of the link member is guided by a guide portion provided on a link guide hole. Before sheet feeding starts, the movement of the link member is regulated by a holding portion provided on a lower end of the guide portion so as to hold the lifting plate in a standby position against a biasing force of a feed spring. When the sheet is fed, a feed cam rotating integrally with a feed roller presses the link member to release the link member from being locked by the holding portion of the link guide hole to thereby make the link member movable along the guide portion.
Claims24
A sheet feeding apparatus comprising:
- a sheet supporting member capable of being lifted and lowered while supporting a sheet;
- a feed roller located above the sheet supporting member and feeding the sheet stacked on the sheet supporting member;
- and
- a lifting portion lifting and lowering the sheet supporting member, the lifting portion including a biasing portion which biases the sheet supporting member toward the feed roller;
- a link member which is rotatably supported by the sheet supporting member;
- and a regulation release member which rotates integrally with the feed roller and enables movement of the link member being restricted from movement when the sheet is fed.
An image forming apparatus comprising:
- a sheet supporting member capable of being lifted and lowered while supporting a sheet;
- a feed roller located above the sheet supporting member and feeding the sheet stacked on the sheet supporting member;
- and
- an image forming portion which forms an image on the sheet fed by the sheet feeding roller;
- a lifting portion lifting and lowering the sheet supporting member, the lifting portion including a biasing portion which biases the sheet supporting member toward the feed roller;
- a link member which is rotatably supported by the sheet supporting member;
- and a regulation release member which rotates integrally with the feed roller and enables movement of the link member being restricted from movement when the sheet is fed.
Dependencies are inferred from the claim text.