Patent ID: 9057990
Filing Date: 2015-06-16
Classification: G03G

Abstract:
1. An image forming apparatus, comprising: an image forming unit attached to a body of the image forming apparatus and configured to form an image on a sheet; a belt unit detachably attached to the body of the image forming apparatus, the belt unit comprising: a frame positioning member arranged in the belt unit and configured to define a position of the frame in the axial direction with respect to the body of the image forming apparatus; a first roller positioning member arranged in the belt unit and configured to define a position of the first roller in the axial direction with respect to the frame; a guiding member arranged in a position corresponding to an axial-end side of the first roller along the axial direction in the endless belt and configured to protrude from a belt strip of the endless belt; and an engageable member arranged on the axial end side of the first roller in the belt unit and configured to restrict the endless belt from being moved in the axial direction by engaging with the guiding member, wherein the frame positioning member, the first roller positioning member, and the engageable member are arranged on the same axial-end side along the axial direction, and wherein the first roller positioning member includes a concave groove formed on the axial-end side of the first roller.