Belt device and image forming apparatus

Abstract

A belt device includes a belt, a relay, multiple rollers including a drive roller, a tension roller, and a backup roller, a housing, a slide plate, and an adjuster. The drive roller rotates to cause the belt to travel. The tension roller applies tension to the belt, the belt stretched between the drive roller and the tension roller. The backup roller is rotatably supported by the relay and contacts an inner circumferential surface of the belt at a contact position. The housing supports both ends of each of the multiple rollers in an axial direction. The slide plate is held by the housing, holds and fixes the relay at a fix position in a slide direction orthogonal to the axial direction, and is slidable, in the slide direction, to shift the contact position in the slide direction. The adjuster adjusts the fix position of the relay in the slide direction.

Dependencies are inferred from the claim text.