| 摘要 |
PROBLEM TO BE SOLVED: To improve the maintenance operability of a revolving developing device by providing a forcibly driving switch for forcibly driving a driving device in the state of an inspection door opened. SOLUTION: A toggle switch 151 as a forcibly driving switch is provided near a fixing device. The toggle switch 151 transmits a drive command input signal to a control part in the ON state by the hand of a worker. The control part transmits a prescribed number of driving pulses, when the drive command input signal is received from the toggle switch 151, to a stepping motor regardless of the operation of interlock guard function. The stepping motor is driven by the driving pulses to rotate a revolver developing unit. By this rotation, the worker can rotate the revolver developing unit in the state of a front frame opened, and move a toner cartridge 30 M, for example, to a replaceable position. |
