초록 ▼

An escalator drive machine includes a motor output sheave connected to a drive motor through a belt reduction assembly including a main output sheave. A drive belt extends from the belt reduction assembly and is guided along a plurality of guide sheaves to engage the step chain and propel the escala

An escalator drive machine includes a motor output sheave connected to a drive motor through a belt reduction assembly including a main output sheave. A drive belt extends from the belt reduction assembly and is guided along a plurality of guide sheaves to engage the step chain and propel the escalator tread plates. In addition, by locating a pinch roller adjacent the handrail, the drive belt and handrail can be pinched together to provide a motive force to the handrail. The drive belt thereby synchronously drives the handrail. In another embodiment the drive machine includes a counter-rotating motor to drive a drive belt on each side of the escalator system.

대표청구항 ▼

1. A passenger conveyer system comprising: a plurality of tread plates connected by a step chain; a drive belt driveable by an output sheave that is driven by a drive machine; and a plurality of engagement sheaves, located in parallel with and spaced along a length of said step chain, said enga

1. A passenger conveyer system comprising: a plurality of tread plates connected by a step chain; a drive belt driveable by an output sheave that is driven by a drive machine; and a plurality of engagement sheaves, located in parallel with and spaced along a length of said step chain, said engagement sheaves engaging said drive belt to maintain said drive belt engaged with said length of said step chain in a substantially parallel relationship to propel said plurality of tread plates. 2. A passenger conveyer system as recited in claim 1, wherein said drive belt includes a plurality of belt teeth and said step chain includes a plurality of links, each of said links having a plurality of link teeth, said belt teeth engageable with said plurality of link teeth. 3. A passenger conveyer system as recited in claim 1, including a movable handrail, said movable handrail engageable with said drive belt to synchronously propel said movable handrail with said plurality of tread plates. 4. A passenger conveyer system as recited in claim 3, including a plurality of pinch sheaves to engage said drive belt with said movable hand rail. 5. A passenger conveyer system as recited in claim 1, wherein said plurality of tread plates pass through a turn around area in which said plurality of tread plates change heading along a path forming a substantially non-continuous radius. 6. A passenger conveyer system as recited in claim 5, wherein said plurality of tread plates change heading along a substantially parabolic path. 7. A passenger conveyer system as recited in claim 1, wherein said drive machine includes a counter-rotating motor. 8. A passenger conveyer system as recited in claim 1, further comprising a belt reduction assembly attached to said drive machine, said belt reduction assembly driving said drive belt. 9. A passenger conveyer system as recited in any of claims 1-8, wherein at least three of said engagement sheaves engage said drive belt with said length of said step chain.