| 摘要 |
PROBLEM TO BE SOLVED: To provide a safety door-locking state detector which detects a preliminary behavior for opening a door. SOLUTION: This detector is provided with: a first locking part which locks a door fitted to a casing in an openable and closable manner and closing the casing by closing itself to the casing and which has a first light transmission part formed at a prescribed position; a second locking part for locking the first locking part and having a second light transmission part formed at a prescribed position; a light emitting part arranged at the casing or the door for emitting the light; and a light receiving part arranged at the housing or the door, where the light emitting part is not arranged, for receiving the light emitted from the light emitting part through the first light transmission part and the second light transmission part. Thus, the locking state is detected based on that whether or not the light receiving part receives the light from the light emitting part. COPYRIGHT: (C)2005,JPO&NCIPI
|
