Patent ID: 8422099

Claim:
An image forming apparatus comprising: an apparatus body; an image carrier unit that includes: a support member; and an image carrier that is rotatably supported by the support member and directly or indirectly carries images; a positioning part that is provided at the apparatus body and positions the image carrier unit by being abutted against the support member; a plurality of rotating bodies which are provided in the apparatus body, are rotationally driven independently of each other, and apply forces to the image carrier unit, the forces being based on rotations of the rotating bodies; and a controller that controls driving states of the plurality of rotating bodies, wherein the controller controls the rotating bodies so that a resultant force of forces applied to the image carrier unit from the plurality of rotating bodies is always applied in a normal direction where the support member is abutted against the positioning part, in a period where the plurality of rotating bodies moves to a normal rotation state from a stopped state, and wherein the plurality of rotating bodies includes a normal rotating body, which applies a force to the image carrier unit in the normal direction where the support member is abutted against the positioning part, and a reverse rotating body, which applies a force to the image carrier unit in a direction opposite to the normal direction.