Cleaning unit and image formation apparatus using it

摘要

A cleaning unit having a brush roll with a myriad of slidingly scrubbing bristles upright relative to a rotation shaft for slidingly scrubbing the surface of a rotation body with the brush roll for removing toner deposited on the rotation body. When the brush roll is out of contact with the rotation body, the tips of the slidingly scrubbing bristles are inclined in the circumferential direction and when the brush roll is placed in contact with the rotation body, the brush roll does not rotate by itself and is rotated with rotation of the rotation body. The linear speed of the brush roll at the contact position is made different from that of the rotation body.