Belt conveyance apparatus and image forming apparatus using such a belt conveyance apparatus

Abstract

In an intermediate transfer part (100), a bead 107 is formed on an inner side of an intermediate transfer belt (102), which is rotated by an intermediate transfer belt drive roller (101). Driven roller bearings (104a, 104b) support an intermediate transfer belt driven roller (103). The intermediate transfer belt driven roller (103) is movable in a thrust direction. Ends of the intermediate transfer belt driven roller (101) and the intermediate transfer belt driven roller (103) interfere with a bead (107) so as to restrict a deflection of the intermediate transfer belt in the thrust direction. The intermediate transfer belt driven roller (103) is movable in the thrust direction against a deflection of the intermediate transfer belt (102).

Description

technical field

[0001] The present invention relates generally to an image forming apparatus, and more particularly to an image forming apparatus utilizing a belt conveying apparatus with a driving roller, a driven roller, and a The driven rollers are engaged with the endless belt. Background technique

[0002] A conventional belt conveying apparatus has an endless guide member, a part of which extends from the end surface of a conveying roller positioned on a conveying belt so that the endless guiding member is connected to a drive roller and a driven roller ( It may also be called a follower roller or an idle roller) and the spacer on the end side engages (for example, refer to Patent Document 1). According to the aforementioned structure, if the conveyor belt moves in a zigzag direction, a pressure is exerted on the conveyor belt and a stretching phenomenon occurs, no stress is generated in the endless guide member, and the flatness of the conveyor belt is maintained. ...

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