| 摘要 |
A passenger conveyor system ( 20 ) includes a drive module ( 40 ) that engages a step chain ( 30 ) to move steps ( 22 ) as desired. A non-metallic drive belt ( 50 ) includes a unique configuration of teeth ( 60 ) that engage teeth ( 70, 80 ) of the step chain ( 30 ). In one example, the drive belt teeth ( 60 ) include a projection ( 64 ) that provides the initial engagement point with the step chain teeth ( 70, 80 ). In another example, the teeth ( 60 ) include a generally concave step chain link teeth engaging surface ( 62 ). The inventive arrangement provides smoother, quieter system operation and minimizes the separating forces that otherwise tend to occur between the belt and the step chain links.
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