G03G2215/00143

Belt conveyance device with a meandering correction part shifting one end of a tension roller and an adjustment part shifting the other end
11567433 · 2023-01-31 · ·

The belt conveyance device includes a plurality of rollers, a belt, a meandering correction part, and an adjustment part. The rollers are disposed at intervals each other and rotate around axes. The belt is disposed around the plurality of rollers and travels. The meandering correction part shifts one end portion in an axial direction of a tension roller included in the plurality of rollers in a radial direction within a predetermined range to correct a meandering of the belt. The adjustment part shifts the other end portion in the axial direction of the tension roller in the radial direction such that a position of the one end portion of the tension roller is variable under a state where the meandering of the belt is corrected.

Imaging system

An imaging system includes: a steering roller located between a first belt roller and a second belt roller, that is inclinable around a fulcrum; and a sensor to detect an amount of displacement of the steering roller due to an inclination of the steering roller. A controller may output a command signal when the amount of displacement of the steering roller exceeds a reference value.

Transfer device having meandering prevention members for an image forming apparatus

A transfer device for an image forming apparatus includes a frame, a driving roller, a backup roller, and a transfer belt to travel between the driving roller and the backup roller. The transfer device further include meandering prevention members to rotate independently of the backup roller, the meandering prevention members including a first meandering prevention member located between a first end portion of the backup roller and the frame, and a second meandering prevention member located between a second end portion of the backup roller and the frame. When the transfer belt meanders and contacts one of the first and second meandering prevention members, the one of the first and second meandering prevention members is to be rotatably driven to increase a tension of the transfer belt.

IMAGE FORMING APPARATUS

An image forming apparatus includes an image forming target to be transported along one direction, three or more image formers arranged away from each other along the one direction and configured to form images on the image forming target, and an image forming target winding motion correcting roller rotatably in contact with an inner peripheral surface of the image forming target and positioned on a downstream side of the image former at an upstream end in a transport direction of the image forming target so that plural image formers are positioned on a downstream side of the image forming target winding motion correcting roller. A distance between the plural image formers positioned on the downstream side of the image forming target winding motion correcting roller is an integral multiple of an outer peripheral length of the image forming target winding motion correcting roller.

IMAGE FORMING APPARATUS AND MOVEMENT AMOUNT DETECTION DEVICE

An image forming apparatus includes: a belt to be transported; an image forming body that forms an image on the belt or a recording medium that is transported by the belt; a moving mechanism that moves the belt in a movement direction extending in a thickness direction of the belt; a rotational member including a rotation shaft extending in the movement direction and a contact portion that is rotatable around the rotation shaft and that is in contact with a side surface of the belt regardless of a position of the belt in the movement direction; an acquirer that acquires a physical amount that changes due to rotation of the contact portion around the rotation shaft when the belt moves in a width direction; and a detector that detects a movement amount of the belt in the width direction based on the physical amount acquired by the acquirer.

Image forming apparatus and movement amount detection device

An image forming apparatus includes: a belt to be transported; an image forming body that forms an image on the belt or a recording medium that is transported by the belt; a moving mechanism that moves the belt in a movement direction extending in a thickness direction of the belt; a rotational member including a rotation shaft extending in the movement direction and a contact portion that is rotatable around the rotation shaft and that is in contact with a side surface of the belt regardless of a position of the belt in the movement direction; an acquirer that acquires a physical amount that changes due to rotation of the contact portion around the rotation shaft when the belt moves in a width direction; and a detector that detects a movement amount of the belt in the width direction based on the physical amount acquired by the acquirer.

FIXING DEVICE FOR REDUCING BELT DAMAGE

A fixing device includes a belt having a tubular shape and extending in a longitudinal direction, and having a longitudinal end, a drive roller to rotate the belt to convey a print medium between the drive roller and the belt, a bushing located at the longitudinal end of the belt, and a guide wall adjacent to the bushing. The belt is displaceable in the longitudinal direction relative to the bushing. The bushing includes a shoulder adjacent to the longitudinal end of the belt and a stem extending from the shoulder to an inside of the belt to support the belt. The guide guides the bushing to move in a direction opposite to a conveyance direction of the print medium when the belt moves toward the bushing. The stem of the bushing includes a convex portion that is in contact with an inner surface of the belt when the belt is displaced in the longitudinal direction.

BELT DEVICE, BELT CONTROL DEVICE, AND IMAGE FORMING APPARATUS INCLUDING SAME
20170242387 · 2017-08-24 ·

A belt control device includes a holder to movably support a rotation shaft of at least one of the plurality of rotators around which a belt is looped, a contact part to contact an end of the belt as the belt moves in a belt width direction, a stationary frame part disposed facing the holder, a shaft moving device to move the rotation shaft as the belt moves, and at least one projection disposed on one of the stationary frame part and the holder. The projection is to contact the other of the stationary frame part and the holder. The projection includes a long projection having a contact portion extending in a shaft moving direction in which the rotation shaft moves, and the contact portion is contactable with the other of the stationary frame part and the holder.

IMAGING SYSTEM
20210389698 · 2021-12-16 ·

An imaging system includes an endless belt, a tensioning system that applies tension to the endless belt, a contact member that engages with the endless belt, and a detector that detects slack at a part of the endless belt. A controller causes the contact member to be separated from the endless belt so that the tensioning system reduces the slack of the endless belt in response to the detector detecting the slack.

Imaging system

An imaging system includes an endless belt, a tensioning system that applies tension to the endless belt, a contact member that engages with the endless belt, and a detector that detects slack at a part of the endless belt. A controller causes the contact member to be separated from the endless belt so that the tensioning system reduces the slack of the endless belt in response to the detector detecting the slack.