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US 9,798,282 B2Granted
Belt conveyor unit and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorsTomoyuki Iwakoshi, Atsushi Ogata, Daisuke Kaneko
Life of this patent
Estimating the term…
Abstract
An inclined flange roller is located outward of an end portion of a tension roller in the belt width direction. The inclined flange roller includes a flange surface capable of being in contact with the edge portion of a belt in a region in which the belt is wound around the tension roller and a roller surface capable of being in contact with an inner peripheral surface of the belt between the flange surface and an end portion of the tension roller in the belt width direction.
Claims21
A belt conveyor unit comprising:
- a movable endless belt;
- a stretching roller configured to stretch the belt;
- a bearing configured to support a stretching roller shaft of the stretching roller;
- and
- a regulation member configured to regulate lateral shift of the belt in a case the belt is shifted to one side in a belt width direction that is perpendicular to a belt moving direction,
- wherein the regulation member is fixed in a non-rotatable state in relation to the stretching roller shaft, and is disposed outward of an end portion of the stretching roller in the belt width direction,
- wherein the regulation member includes a first regulation portion opposing an edge portion of the belt with respect to a width direction of the belt and a second regulation portion capable of being in contact with an inner peripheral surface of the belt between the first regulation portion and the end portion of the stretching roller in the belt width direction,
- wherein the first regulation portion includes
- a first surface contactable to the edge portion of the belt corresponding to a first region of the belt wound around the stretching roller;
- and
- a second surface that is provided at a position retracted from the edge portion of the belt in comparison with the first surface in the belt width direction and is not in contact with the edge portion of the belt corresponding to a second region of the belt not wound around the stretching roller.
8 more elements
An image forming apparatus comprising:
- a plurality of image bearing members configured to bear toner images of different colors;
- a movable endless belt configured to transfer the toner images from the image bearing members to a transfer material;
- a stretching roller configured to stretch the belt;
- a bearing configured to support a stretching roller shaft of the stretching roller;
- and
- a regulation member configured to regulate lateral shift of the belt if the belt is shifted to one side in a belt width direction that is perpendicular to a belt moving direction,
- wherein the regulation member is fixed in a non-rotatable state in relation to the stretching roller shaft, and is disposed outward of an end portion of the stretching roller in the belt width direction,
- wherein the regulation member includes a first regulation portion opposing an edge portion of the belt with respect to a width direction of the belt and a second regulation portion capable of being in contact with an inner peripheral surface of the belt between the first regulation portion and the end portion of the stretching roller in the belt width direction,
- wherein the first regulation portion includes
- a first surface contactable to the edge portion of the belt corresponding to a first region of the belt wound around the stretching roller;
- and
- a second surface that is provided at a position retracted from the edge portion of the belt in comparison with the first surface in the belt width direction and is not in contact with the edge portion of the belt corresponding to a second region of the belt not wound around the stretching roller.
9 more elements
A belt conveyor unit comprising:
- a movable endless belt;
- a stretching roller configured to stretch the belt;
- a bearing configured to support a stretching roller shaft of the stretching roller;
- and
- a regulation member configured to regulate lateral shift of the belt in a case the belt is shifted to one side in a belt width direction that is perpendicular to a belt moving direction,
- wherein the regulation member is fixed in a non-rotatable state in relation to the stretching roller shaft, and is disposed outward of an end portion of the stretching roller in the belt width direction,
- wherein the regulation member includes a first regulation portion opposing an edge portion of the belt with respect to a width direction of the belt and a second regulation portion capable of being in contact with an inner peripheral surface of the belt between the first regulation portion and the end portion of the stretching roller in the belt width direction, and
- wherein the first regulation portion includes
- a first surface contactable to the edge portion of the belt corresponding to a first region of the belt wound around the stretching roller;
- and
- a second surface not in contact with the edge portion of the belt corresponding to the first region.
8 more elements
An image forming apparatus comprising:
- a plurality of image bearing members configured to bear toner images of different colors;
- a movable endless belt configured to transfer the toner images from the image bearing members to a transfer material;
- a stretching roller configured to stretch the belt;
- a bearing configured to support a stretching roller shaft of the stretching roller;
- and
- a regulation member configured to regulate lateral shift of the belt if the belt is shifted to one side in a belt width direction that is perpendicular to a belt moving direction,
- wherein the regulation member is fixed in a non-rotatable state in relation to the stretching roller shaft, and is disposed outward of an end portion of the stretching roller in the belt width direction,
- wherein the regulation member includes a first regulation portion opposing an edge portion of the belt with respect to a width direction of the belt and a second regulation portion capable of being in contact with an inner peripheral surface of the belt between the first regulation portion and the end portion of the stretching roller in the belt width direction,
- wherein the first regulation portion includes
- a first surface contactable to the edge portion of the belt corresponding to a first region of the belt wound around the stretching roller;
- and
- a second surface not in contact with the edge portion of the belt corresponding to the first region.
9 more elements
Dependencies are inferred from the claim text.