Patent ID: 9195178
Filing Date: 2015-11-24
Classification: G03G

Abstract:
1. A belt unit comprising: a rotary endless belt; a tension roller extending the endless belt and applying a tension force to the endless belt; at least one extension roller extending the endless belt with the tension roller; a first bearing portion supporting a first end of the tension roller such that the first end is movable in a tension direction and is detachably mounted to be able to release the tension force by the first end coming off from the first bearing portion; a second bearing portion supporting a second end of the tension roller to be movable in the tension direction; a first urging portion urging the first end of the tension roller and generating the tension force; a second urging portion urging the second end of the tension roller and generating the tension force; a first frame portion integrally supporting the first bearing portion, the first urging portion, and the extension roller; and a second frame portion integrally supporting the second bearing portion, the second urging portion, and the tension roller and detachably mounted on the first frame portion.