Belt device, fixing device, and image forming apparatus

摘要

A belt device includes a support and a support roller that support a belt. A driven gear is mounted on one of a plurality of shafts of the support roller. A driving gear meshing with the driven gear at a mesh position transmits a driving force to the support roller through the driven gear to rotate the support roller. An elastic bearing rotatably bearing each of the plurality of shafts of the support roller has an inner diameter smaller than an outer diameter of the shaft of the support roller. The bearing includes a slit defining a part of the bearing in a circumferential direction thereof. The slit is disposed upstream from the mesh position in the direction of rotation of the support roller such that the mesh position and the slit define a circumferential angle not smaller than about 20 degrees.

主权项

1. A belt device comprising:
a belt; a support supporting the belt; a support roller rotatable in a predetermined direction of rotation and supporting the belt, the support roller including a plurality of shafts disposed at both lateral ends of the support roller in an axial direction thereof, respectively; a driven gear mounted on one of the plurality of shafts of the support roller; a driving gear meshing with the driven gear at a mesh position to transmit a driving force to the support roller through the driven gear to rotate the support roller; and an elastic bearing rotatably bearing each of the plurality of shafts of the support roller and having an inner diameter smaller than an outer diameter of the shaft of the support roller, the bearing including a slit defining a part of the bearing in a circumferential direction thereof, the slit being disposed upstream from the mesh position in the direction of rotation of the support roller such that the mesh position and the slit define a circumferential angle not smaller than about 20 degrees.