| 摘要 |
<p>The fire door actuator for twin leaf fire doors has a rail (7) fixed to the frame and a closer for each leaf, each with a carriage sliding in the rail. Each carriage has a pivoted rod (15,16) of adjustable length, parallel to the rail and cooperating with a selector (11) with a movable cradle (20) movable between locking and release positions. The cradle has bronze bearing bushes and is guided by two shafts (23,24)</p> |
