| 摘要 |
<p>A landing door device of an elevator capable of securely and easily preventing the locking device of a landing door from being unlocked by the persons other than those who are allowed to unlock it. The landing door device comprises the locking device locking the landing door of the elevator, an unlocking device unlocking the locking device, an authentication device authenticating the persons who are allowed to unlock the locking device, and an unlocking limiting device allowing the unlocking operation of the unlocking device based on the results of authentication by the authentication device. When a person who is to be authenticated is authenticated, by the authentication device, to be a pre-registered person who is allowed to unlock the locking device, the unlocking operation limitation of the unlocking device by the unlocking limiting device is released, and when the person who is to be authenticated is not authenticated, by the authentication device, to be the person who is allowed to unlock the locking device, the unlocking operation limitation of the unlocking device by the unlocking limiting device is maintained.</p> |
