| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lock device for panic door of a safety fence of a platform of a station capable of being installed in a thin door frame, securing a large stroke of a lock rod, and unreleasable by mischief and the wrong operation. SOLUTION: A link mechanism is formed of a camshaft 8 rotatably supported by a main body case 2, a rocking link 9 having a guide projection 9a inserted into a vertical long slot 2a of the main body case at an intermediate part thereof, a slide link 11 having a guide pivotal shaft 11a inserted into the vertical long slot 2a at a base end thereof, and a relay link 10 for connecting the rocking link 9 and the slide link 11 to each other. This link mechanism is driven for extension and shrinkage by the vertical movement of a slider 7 formed with a lateral long slot 7c, in which an eccentric projection 8a of the camshaft 8 is fitted, so as to move the lock rod 12 forward and backward to the lock position.</p> |
