| 摘要 |
A door actuator is described which comprises elongate guide rail means (23) adapted to be mounted in a direction substantially parallel to the direction of opening and closing movement of a door. The guide rail means (23) is formed with first and second guide channels (59 and 60) and has one end secured to a base. A first part of a flexible elongate tape (24) is disposed in the first guide channel (59) and a second part in the second guide channel (60). Means are provided for establishing a positive driving engagement between the tape and the periphery of a drive wheel drivable by means of a motor. Means are also provided for interconnecting a carriage (25) which is longitudinally guidable on the guide rail means and the tape. A link (26) connected to the carriage is provided for connection to the door such that movement of tape causes the door to open or close. |
