IMAGE FORMING APPARATUS

摘要

An image forming apparatus includes an image carrier, a cleaning member, a rotation controlling part, a first obtaining part and a mode changing part. The image carrier has a surface to carry a toner image transferred onto a sheet. The cleaning member contacts the surface of the image carrier at a downstream side in a rotating direction of the image carrier from a transferring position transferring the toner image to collect a toner from the image carrier and to hold the toner. The rotation controlling part has a first speed control mode rotating the cleaning member at a first rotational speed and a second speed control mode rotating the cleaning member at a second rotational speed faster than the first rotational speed and switches from the first speed control mode to the second speed control mode at predetermined switch timing.

主权项

1. An image forming apparatus comprising:
an image carrier being arranged rotatably and having a surface to carry a toner image transferred onto a sheet; a cleaning member rotating with coming into contact with the surface of the image carrier at a downstream side in a rotating direction of the image carrier from a transferring position transferring the toner image to collect a toner from the image carrier and to hold the toner; a rotation controlling part having a first speed control mode rotating the cleaning member at a first rotational speed according to a thickness of the sheet when the toner image is transferred onto the sheet and a second speed control mode rotating the cleaning member at a second rotational speed faster than the first rotational speed and switching from the first speed control mode to the second speed control mode at predetermined switch timing; a first obtaining part obtaining a first transferring number indicating the number of sheets having a thickness equal to or more than a first threshold determined in advance among sheets to be subjected to transferring of the toner image; and a mode changing part changing the switching timing in accordance with the first transfer number.