| 摘要 |
An elevator door operator for positioning elevator doors along an arcuate pathway includes a linearly displaceable actuator and a pair of linkage arms, each pivotally connected to the other and connected to one end of the linearally displaceable actuator. The linkage arms are also each pivotally connected at their opposite ends to each of two support arms, each of which support arms are pivotally connected at one of their ends to each other and secured at their opposite ends, respectively to each of the door panels. The door operator may be provided as part of a door assembly which additionally includes an upper guide track comprising an elongate bar including at least two generally planar support surfaces, which guide track is mounted above the door opening to define an arcuate door travel pathway, two door panels, suspended from the upper guide track via a carriage assembly which includes a carriage frame and at least two wheels each supported by, and in rolling contact with, at least two of the support surfaces on the guide track, and a hinge pin extending from the carriage frame to pivotally connect the carriage assembly to the door panel. One embodiment operates a single door for positioning along an arcuate pathway. |
