Patent ID: 7920808
Filing Date: 2011-04-05
Classification: G03G

Abstract:
1. A belt device for use in an image forming apparatus such that the belt device can be pulled out to the front with respect to a body of the image forming apparatus, the belt device comprising: an endless belt member supported at a plurality of roller members so as to travel in a predetermined direction; two side frames disposed along sides of the belt member in the direction of travel of the belt member, the side frames being respectively slidably supported at two slide rails disposed at the body; a rear frame constructed to the rear across the two side frames, rotatably supporting shafts of the roller members at the rear side, and having a box-type structure; a front frame rotatably supporting shafts of the roller members on the front side, and having a projecting surface smaller than an inner periphery of the belt member when viewed from the front; a support frame cantilever-supporting the front frame with respect to the rear frame; and triangular reinforcing members constructed across both the side frames and the rear frame near joints of the side frames and the rear frame.