| 摘要 |
<p>The door drive is intended for use with a relatively great number of different elevator cars, different types of sliding doors, and different widths of sliding door panels. The door drive is readily adaptable to different installations merely by appropriate adjusting and conversion work without dismounting the door drive. The door drive is fitted with its supporting structure above the door opening on the roof of the elevator car. A toothed belt serves as a drive for one panel of a sliding door and is trained around a stationary and a positionally changeable deflection roll. The positionally changeable deflection roll can be adapted to each required displacement path of a given door panel by positionally changing a shaft of such deflection roll to a preselected one of a number of fixing holes provided in the supporting structure. The maximum displacement path of the driven panel thus corresponds to the horizontal distance of the axes of the two deflection rolls increased by the radii of the two deflection rolls. Guidance of a connecting joint, arranged at the toothed belt and at a coupling bracket of the door panel, around the deflection rolls results in a gradual starting accelertion and a gradual run-out deceleration when opening or closing the sliding door.</p> |
