| 摘要 |
<p>PROBLEM TO BE SOLVED: To exactly detect a half-open state of a door and to automatically open the door at the half-open state by simple structure.SOLUTION: A door closing system 1 comprises: a door opening/closing detection section 5 which detects opening or closing of a door to a door frame 3; a half-open door detection section 6 which detects whether or not a door 2 is half-open; a door closing electromagnet 7 buried on a side end face on a door end of the door 2; a door closing magnetic member 11 provided to the door frame 3 so as to face the door closing electromagnet 7 at a door closing state; and a control section 23 which performs control so as to excite the door closing electromagnet 7 when the door opening/closing detection section 5 detects door opening and the half-open door detection section 6 detects a half-open door.</p> |
