Edge regulating member, belt rotation device, and image forming device
AssigneeSharp Kabushiki Kaisha
InventorShohtaroh Okamoto
Life of this patent
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Abstract
An edge regulating member provided in a belt rotation device that tensions a belt via a belt tensioning roller and rotates the belt in a rotation direction includes a body that comes into contact with an inner surface of the belt and a regulating portion that extends, at a position adjacent to the body, further outward in a radial direction of the belt tensioning roller than the body, and comes into contact with an edge of the belt. Tension of the belt acting on the body while the inner surface of the belt is in contact with the body causes the regulating portion to tilt, turned outward in the rotation axis direction from a fold-back portion of the belt toward an upstream side in the rotation direction.
Claims17
An edge regulating member included in a belt rotation device that tensions a belt via a belt tensioning roller and rotates the belt in a rotation direction, the edge regulating member being provided in a rotatable manner on a rotary shaft of the belt tensioning roller to regulate misaligned movements of the belt in a rotation axis direction of the belt tensioning roller, the edge regulating member comprising:
- a body that comes into contact with an inner surface of the belt;
- and
- a regulating portion that extends, at a position adjacent to the body, further outward in a radial direction of the belt tensioning roller than the body and comes into contact with an edge of the belt,
- wherein tension of the belt acting on the body, while the inner surface of the belt is in contact with the body, causes the regulating portion to tilt and turn outward in the rotation axis direction from a fold-back portion of the belt toward an upstream side in the rotation direction, and
- at an inner peripheral surface opposite the rotary shaft, a first inner diameter of an inner end of the edge regulating member in the rotation axis direction is greater than a second inner diameter of an outer end of the edge regulating member in the rotation axis direction.
A belt rotation device, comprising:
- a belt;
- a belt tensioning roller that tensions the belt and rotates the belt in a rotation direction;
- and
- an edge regulating member provided in a rotatable manner on a rotary shaft of the belt tensioning roller to regulate misaligned movements of the belt in a rotation axis direction of the belt tensioning roller,
- wherein the edge regulating member includes:
- a body that comes into contact with an inner surface of the belt, and
- a regulating portion that extends further outward in a radial direction of the belt tensioning roller than the body and comes into contact with an edge of the belt,
- tension of the belt acting on the body, while the inner surface of the belt is in contact with the body, causes the regulating portion to tilt and turn outward in the rotation axis direction from a fold-back portion of the belt toward an upstream side in the rotation direction,
- a gap is provided between the edge regulating member and the rotary shaft, and
- at the gap, a first gap at an inner end in the rotation axis direction is greater than a second gap at an outer end in the rotation axis direction.
A belt rotation device comprising:
- a belt;
- a belt tensioning roller that tensions the belt and rotates the belt in a rotation direction;
- an edge regulating member provided in a rotatable manner on a rotary shaft of the belt tensioning roller to regulate misaligned movements of the belt in a rotation axis direction of the belt tensioning roller;
- and
- a belt misalignment correction device that corrects the misaligned movements of the belt,
- wherein the edge regulating member includes:
- a body that comes into contact with an inner surface of the belt, and
- a regulating portion that extends further outward in a radial direction of the belt tensioning roller than the body and comes into contact with an edge of the belt,
- tension of the belt acting on the body, while the inner surface of the belt is in contact with the body, causes the regulating portion to tilt and turn outward in the rotation axis direction from a fold-back portion of the belt toward an upstream side in the rotation direction,
- the edge regulating member is provided on either side of the rotary shaft of the belt tensioning roller in the rotation axis direction, and
- the belt misalignment correction device includes, at the either side of the belt tensioning roller:
- a moving member that is provided in a movable manner in the rotation axis direction, the moving member being provided further outward than the edge regulating member of the rotary shaft in the rotation axis direction, and
- a swinging portion that, when the moving member is moved by the edge regulating member caused to move by the belt misaligned outward in the rotation axis direction, causes the belt tensioning roller to swing in a direction tilting the belt tensioning roller such that the belt moves inward in the rotation axis direction.
Dependencies are inferred from the claim text.