| 摘要 |
<p>PURPOSE: To open and close easily a door even when a dead lock mechanism is broken by changing over a door lock and unlock mechanism to the unlocking direction and giving the information when detecting an operational failure in the dead lock mechanism or a state which is highly possible to reach a trouble with a trouble diagnosing means installed. CONSTITUTION: Voltage detection resistors 30a and 30b are adapted to monitor the application of voltage to a motor 9. Since a signal processing circuit 5' is not arranged to indicate the supply of an electric current to the motor 9 from a dead lock/unlock drive circuit 8, it is determined that an operational failure has occurred in a mechanical mechanism, if it is determined that the valued transmitted from the voltage detection resistors 30a and 30b exceeds a definite value or if it fails to exceed the values from the voltage detection resistors 30a and 30b although the supply of a lock current is indicated. In addition to that, the signal processing circuit 5' is adapted to supply an unlock current to the motor 7 from a door lock/unlock drive circuit 6. After the door is set in an unlocked state, an alarming device 31 is operated, thereby informing an operation failure of a dead lock actuator.</p> |
