Belt cleaning device having cleaning blade for image forming apparatus

摘要

A pressure release cam and a boomerang cam are provided. The pressure release cam is interlocked with a belt cleaner when the latter is turned, whereas the boomerang cam is interlocked with the belt cleaner when the latter is mounted in position. As the belt cleaner is turned to move the cleaning blade away from an intermediate transfer belt, the pressure release cam is moved to a release position to release the cleaning member from the pressure applied to it by a pushing unit. The pressure applied by the pushing unit to the cleaning member is restored when the boomerang cam is turned as a motion interlocked with the operation of mounting the belt cleaner in position and the pressure release cam is taken out from the release position. The cleaner frame is provided with first and second guide rails for allowing the belt cleaner to slide and a toner anti-fall dish.