| 摘要 |
PURPOSE: A method for locking an entrance automatic door is provided, which does not use an additional solenoid by rotating a motor toward a direction along which the door to be closed and closing the door compulsorily. CONSTITUTION: According to the method, a locking solenoid is removed and a motor performs a function of a locking unit by an instruction of a control part, and the control part checks whether there is a lock instruction(S0). When there is a lock instruction, it is checked whether there is an encoder output indicating an illegal intrusion(S1). When there is an encoder output, the door locking is maintained by rotating the motor reversely for a constant time toward a direction along which the door is closed(S2).
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