| 摘要 |
<p>A motor-driven device for controlling an overhead door (15), comprises, in combination: a self-propelling motor (10), a guide (11) adapted to be fixed to a wall of the location (14), along which guide (11) the said self-propelling motor (10) translated, and means (30) for connecting the said self-propelling motor (10) to the said overhead door (15), wherein the said guide (11) consists of at least two pieces of section iron which can be rigidly interconnected by joining means (22).</p> |
