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

摘要

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 ( 104 a , 104 b) 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 ).