Transfer device of image forming machine

摘要

A transfer device of an image forming machine has a belt unit (30) comprising a pair of supporting plates (35, 36) disposed with a predetermined spacing, a driving roller (43) journaled rotatably at one end portion of the pair of supporting plates, a driven roller (49) journaled rotatably at the other end portion of the pair of supporting plates (35, 36) with a predetermined spacing from the driving roller (43). A transfer roller (50) is disposed between the driving roller (43) and the driven roller (49), journaled rotatably on the pair of supporting plates (35, 36) and given a predetermined voltage. A transfer belt (57) is looped around the driving roller (43), the driven roller (49) and the transfer roller (50), and disposed opposite an image bearing member (3). The transfer belt (57) of the belt unit is formed so as to have a width larger than the spacing between the pair of supporting plates (35, 36) and is disposed such that its side end portions surround at least part of the pair of supporting plates. <IMAGE>