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US 8,577,261 B2Granted
Belt device and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsMakoto Nakura, Junji Shirakawa, Hiroshi Suzuki
Life of this patent
Estimating the term…
Abstract
A belt member is supported by a plurality of rollers and moves in a predetermined moving direction. A detecting unit detects a displacement of the belt member in its width direction. A correcting unit moves a second end of a first roller from among the rollers in either one of a forward direction and a backward direction while fixing its first end based on a result of detecting the displacement of the belt member such that a tilt of a rotating shaft of the first roller is changed to correct a meandering of the belt member. An adjusting unit adjusts a fixing position of the first end.
Claims25
A belt device comprising:
- a belt member that is supported by a plurality of rollers and moves in a predetermined moving direction;
- a detecting unit that detects a displacement of the belt member in its width direction;
- a correcting unit that moves during operation of the belt device, a second end of a first roller among the rollers from a default position of the second end in either one of a forward direction and a backward direction while keeping a first end fixed at a default position of the first end, based on a result of detecting the displacement of the belt member, so that a tilt of a rotating shaft of the first roller is changed to correct a meandering of the belt member;
- and
- a position adjusting unit that adjusts the default position of the first end of the first roller by moving the first end.
2 more elements
A belt device comprising:
- a belt member that is supported by a plurality of rollers and moves in a predetermined moving direction;
- a detecting unit that detects a displacement of the belt member in its width direction;
- a first support member that supports a first end of a first roller among the rollers;
- a second support member that supports a second end of the first roller;
- a frame that supports the second support member;
- a correcting unit that corrects, during operation of the belt device, a relative position of the first end with respect to the second end in either one of a forward direction and a backward direction by moving the first support member while fixing a position of the second support member with respect to the frame, based on a result of detecting the displacement of the belt member, so that a tilt of a rotating shaft of the first roller is changed to correct a meandering of the belt member;
- and
- a position adjusting unit that adjusts a position of the second end by moving the second support member with respect to the frame.
5 more elements
A belt device comprising:
- a belt member that is supported by a plurality of rollers and moves in a predetermined moving direction;
- a detecting unit that detects a displacement of the belt member in its width direction;
- a first support member that supports a first end of a first roller among the rollers;
- a second support member that supports a second end of the first roller and is provided with a long hole;
- a frame that supports the second support member and is provided with a female screw portion;
- a screw that is screwed in the female screw portion of the frame through the long hole;
- a correcting unit that corrects, during operation of the belt device, a position of the first end with respect to the second end in either one of a forward direction and a backward direction by moving the first support member while tightening the screw, based on a result of detecting the displacement of the belt member, so that a tilt of a rotating shaft of the first roller is changed to correct a meandering of the belt member;
- and
- a position adjusting unit that adjusts a position of the second end by moving the second support member with respect to the frame while loosening the screw.
6 more elements
A belt device comprising:
- a belt member that is supported by a plurality of rollers and moves in a predetermined moving direction;
- a detecting unit that detects a displacement of the belt member in its width direction;
- a first support member that supports a first end of a first roller among the rollers;
- a position adjusting unit that supports a second end of the first roller and is provided with a long hole and screw;
- a frame that supports the position adjusting unit and is provided with a female screw portion in which the screw of the frame is screwed through the long hole;
- and
- a correcting unit that corrects, during operation of the belt device, a relative position of the first end with respect to the second end in either one of a forward direction and a backward direction by moving the first support member while tightening the screw, based on a result of detecting the displacement of the belt member, so that a tilt of a rotating shaft of the first roller is changed to correct a meandering of the belt member, wherein
- the position adjusting unit adjusts a position of the second end with respect to the frame while loosening the screw.
5 more elements
A belt device comprising:
- a belt member that is supported by a plurality of rollers and moves in a predetermined moving direction;
- a detecting unit that detects a displacement of the belt member in its width direction;
- a correcting unit that corrects a meandering of the belt member by moving, during operation of the belt device, a first roller among the rollers around an oscillating center (W), which is located outside the belt member in the width direction of the belt member, and by changing a tilt of a rotating shaft of the first roller, based on a result of detecting the displacement of the belt member, while keeping the oscillating center (W) fixed at a fixing position;
- and
- an adjusting unit that adjusts the fixing position of the oscillating center (W).
2 more elements
A belt device, comprising:
- a belt that is supported by a first roller and at least one more roller, the belt being movable in a predetermined moving direction;
- a sensor that detects a displacement of the belt in its width direction;
- a cam which moves a first end of the first roller in a first direction, while a second end of the first roller which is opposite to the first end of the roller is fixed, based on a result of detecting the displacement of the belt, so that a tilt of the roller is changed to correct a movement of the belt;
- and
- a screw, which when loose, allows adjustment of a position of the second end of the first roller, and when tight restricts adjustment of the second end of the first roller.
2 more elements
Dependencies are inferred from the claim text.