Patent ID: 8676073

Claim:
An image forming apparatus comprising: a toner case that includes a main body that contains toner, and an agitating unit rotatably provided in the main body that agitates the toner; a drive section that includes a driving unit that drives the agitating unit, and a detection unit that detects a driving state of the driving unit; and a control unit that is able to transmit a drive instruction signal to the driving unit and is able to receive a detection signal regarding the driving state of the driving unit from the detection unit, wherein the control unit determines whether or not the toner case is in an overload state in accordance with a reception state of the detection signal from the detection unit, and performs a retry control when the control unit determines that the toner case is in the overload state, the retry control causing the driving unit to repeatedly rotate the agitating unit forward and backward, the agitating unit is rotatably supported by the main body and includes an agitating film provided in an axial direction of the agitating unit, the agitating film is brought into contact with and moved away from an inner wall surface of the main body as the agitating unit rotates, and a rotational phase of the agitating unit is adjusted such that, at the start of use of the toner containing case, the agitating film contacts the inner wall surface of the main body.