| 摘要 |
PURPOSE: A lock device for an opening/closing door is provided to improve the security of an opening/closing door against an external intrusion by locking the door at three points. CONSTITUTION: Two roller latches(32) are installed around a strike(30) for insertion of a latch bolt(61) and a strike box(31) on the door side of a door post. A lock device body(60) is inserted in the post side of an opening/closing door. Upper and lower slide plates(51,52) capable of moving up and down are installed between a support plate(40) and the lock device body. When the latch bolt is moved back by the strike, the upper and lower slide plates pulled with a sliding blade(62) of the latch bolt, rollers(53) are pulled to the top and the bottom. Then, the latch bolt is inserted in the strike box so that the rollers attached to the upper and lower slide plates are inserted in the roller latches, thereby locking three points of the opening/closing door by the roller latches in the door post and the strike. |
