Sheet feeding apparatus and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorFumihiko Hayayumi
Life of this patent
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Abstract
A sheet feeding apparatus and an image forming apparatus capable of ensuring reliability of meshing of gears at low cost are provided. When a sheet feeding cassette is mounted to a printer body, a lifter gear provided to a lifter shaft of a lifter plate which lifts a sheet supporting plate is engaged with a first lifter idler gear, and the lifter gear is rotated by rotations of the first lifter idler gear by a drive of a lifter motor, and thereby the sheet supporting plate is lifted. And, displacement of the lifter gear is restricted by a load applied to the lifter gear by a restriction portion provided with an auxiliary support shaft which is provided to an opening portion formed in the lifter gear and the sheet feeding cassette to enter the opening portion when lifting the sheet supporting plate.
Claims13
A sheet feeding apparatus comprising:
- a sheet storage portion which is drawably mounted to an apparatus body and has a sheet stacking portion capable of lifting and lowering, and on which a sheet is stacked;
- a driving portion which is provided to the apparatus body and has a driving gear connected to a drive source;
- a lifting and lowering portion which is provided to the sheet storage portion and has a rotating member capable of rotating in a direction such that the sheet storage portion is lifted, and a lifting and lowering gear provided to a rotation shaft of the rotating member and meshed with the driving gear when the sheet storage portion is mounted to the apparatus body;
- and
- a restriction portion which restricts a displacement of the lifting and lowering gear due to a load applied to the lifting and lowering gear when a driving force from the drive source is transmitted to the lifting and lowering gear from the driving gear.
A sheet feeding apparatus comprising:
- a sheet storage portion which is drawably mounted to an apparatus body and has a sheet stacking portion capable of lifting and lowering, and on which a sheet is stacked;
- a driving portion which is provided to the apparatus body and has a driving gear and a drive source connected to the driving gear;
- a rotating member which is provided to the sheet storage portion and capable of rotating in a direction that the sheet stacking portion is lifted;
- a lifting and lowering gear which is provided to a rotation shaft of the rotating member and meshed with the driving gear when the sheet storage portion is mounted to the apparatus body;
- an opening portion which is formed in the lifting and lowering gear by arc-shaped;
- and
- a support shaft which is provided to the apparatus body or the sheet storage portion and engaged with the opening portion of the lifting and lowering gear when the sheet storage portion is mounted to the apparatus body.
Dependencies are inferred from the claim text.