| 摘要 |
The present invention distinguishes door closing actions between the one effected when an object leaves a prescribed area (i.e. the door closing action resulting from "signal discontinuation due to the exit of an object") and the one effected when an object remains stationary within the area for a certain period of time (i.e. the door closing action resulting from "forced signal discontinuation in the presence of a stationary object"). Regarding the latter case, the present invention protects a person who stops in the area, by setting the door to close at a low speed and/or issuing a vocal warning. This door closing action can reduce the risk of hitting the person with the door.
|
