Patent ID: 9170764
Filing Date: 2015-10-27
Classification: G06F,H04N

Abstract:
1. An image forming apparatus comprising: a motor unit configured to give a rotational drive force to each of rotary members for use in conveying a recording medium; an interlock switch circuit provided in a power supply line capable of connecting a power source and the motor unit to supply electric power, the interlock switch circuit connecting the motor unit to the power source upon closure of a body cover provided on an apparatus body of the image forming apparatus and disconnecting the motor unit from the power source upon opening of the body cover; a power-off detecting section configured to, when a voltage of the power supply line falls below a predetermined voltage value [V], detect that power supply from the power source has been shut off; a rate-of-voltage-change calculating section configured to calculate a rate of change of voltage [V/time ] of the power supply line; and a control section, wherein when the recording medium is pulled out of the rotary member so that the rotary member reversely rotates, the motor unit acts as a generator to generate an electromotive force and the generated electromotive force changes the voltage of the power supply line, and the control section is configured to: when the power-off detecting section detects shutoff of power supply from the power source, deactivate each of mechanisms included in the image forming apparatus; and when thereafter the voltage of the power supply line has reached the predetermined voltage value, acquire the rate of change of voltage calculated by the rate-of-voltage-change calculating section and reactivate each of the mechanisms on condition that the rate of change of voltage has reached a predetermined threshold value.