| 摘要 |
PROBLEM TO BE SOLVED: To prevent the shake of a backup member and to form an excellent image without causing the positional deviation of a belt type image carrier by molding a resin easing by integrating a belt body state support on which the backup member is provided and an opposed rib member having symmetric shape with the backup member. SOLUTION: The resin casing 140 is constituted by providing the belt body state support 40 and a supporting shaft functioning as a bearing member rotatably pivotally supporting a roller member on a rear side plate 40B integrally with the plate 40B. The easing 140 is formed of a resin member. Plural sets of plate-like backup members 41 and 42 and an auxiliary backup member are integrally provided along a belt body on the support 40 of the easing 140. The members 41 and 42 are provided on the support 40 provided in the casing 140, and the plate-like opposed rib members 141 and 142 having the symmetric shape with the members 41 and 42 are provided integrally on the support 110 of the casing 140 symmetrically with respect to the support 40. |
