| 摘要 |
The invention relates to a mechanised device for automatically opening and closing a two-leafed gate while retaining the possibility of manually and independently opening one of the two leaves. It consists of a screw jack 3 actuated by an electric motor 8, the threaded rod 6 of which moves in a two-and-fro motion in order to open, by means of one of its ends, the leaf to which it is attached, the other end pulls the cable 9 which slides in the buried duct 10 in order to open the other leaf; the latter is closed under the action of a spring 14 or of a return system with retarder. <IMAGE> |
