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US 11,524,854 B2Granted
Belt conveyance device and image forming apparatus
AssigneeCanon Kabushiki Kaisha
InventorChikara Imaizumi
Life of this patent
Estimating the term…
Abstract
A bearing which supports one end side of a driving roller includes a first restriction portion which is restricted from rotating and moving with respect to a first frame, and a bearing which supports the other end side of the driving roller includes a second restriction portion which is restricted from rotating and moving with respect to a second frame. As viewed from a direction perpendicular to a width direction of an intermediate transfer belt, a phase of shape of the first restriction portion in a state of being held by the first frame and a phase of shape of the second restriction portion in a state of being held by the second frame are equal to each other.
Claims10
A belt conveyance device comprising:
- a belt of an endless shape configured to rotationally move;
- a first stretching roller and a second stretching roller configured to suspend the belt;
- a first bearing member configured to support one shaft end portion of the first stretching roller in a width direction perpendicular to a movement direction of the belt;
- a second bearing member configured to support the other shaft end portion of the first stretching roller in the width direction, the first bearing member and the second bearing member being members formed by injection molding with a mold;
- a first frame portion including a first holding portion for holding the first bearing member;
- a second frame portion including a second holding portion for holding the second bearing member,
- wherein the first bearing member includes a first projection portion and another first projection portion which project from an outer circumferential surface of the first bearing member, the first projection portion configured to restrict a rotation of the first bearing member relative to the first frame portion, and the another first projection portion, being disposed on an upstream side of the first projection portion in a first orientation which is a direction from the second frame side to the first frame side in the width direction, and configured to restrict a movement of the first bearing member in the first orientation,
- wherein the second bearing member includes a second projection portion and another second projection portion which project from an outer circumferential surface of the second bearing member, the second projection portion configured to restrict a rotation of the second bearing member relative to the second frame portion, and the another second projection portion, being disposed on an upstream side of the second projection portion in the first orientation, and configured to restrict a movement of the second bearing member in the first orientation.
5 more elements
An image forming apparatus comprising:
- a plurality of image bearing members configured to respectively bear toner images of different colors;
- a belt of an endless shape configured to rotationally move;
- a first stretching roller and a second stretching roller configured to suspend the belt;
- a first bearing member configured to support one shaft end portion of the stretching roller in a width direction perpendicular to a movement direction of the belt;
- a second bearing member configured to support the other shaft end portion of the stretching roller in the width direction, the first bearing member and the second bearing member being members formed by injection molding with a mold;
- a first frame portion including a first holding portion for holding the first bearing member;
- and
- a second frame portion including a second holding portion for holding the second bearing member,
- wherein the first bearing member includes a first projection portion and another first projection portion which project from an outer circumferential surface of the first bearing member, the first projection portion configured to restrict a rotation of the first bearing member relative to the first frame portion, and the another first projection portion, being disposed on an upstream side of the first projection portion in a first orientation which is a direction from the second frame side to the first frame side in the width direction, and configured to restrict a movement of the first bearing member in the first orientation,
- wherein the second bearing member includes a second projection portion and another second projection portion which project from an outer circumferential surface of the second bearing member, the second projection portion configured to restrict a rotation of the second bearing member relative to the second frame portion, and the another second projection portion, being disposed on an upstream side of the second projection portion in the first orientation, and configured to restrict a movement of the second bearing member in the first orientation.
7 more elements
Dependencies are inferred from the claim text.