Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – By support means having a zone of varying speed
Patent
1981-11-16
1984-07-31
Valenza, Joseph E.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
By support means having a zone of varying speed
198335, B65G 1700
Patent
active
044625146
ABSTRACT:
A handrail, suitable for use with an accelerating and decelerating moving walkway, comprising a plurality of overlapping handrail elements (51) movable about the periphery of a vertical, oval track, is disclosed. Handrail acceleration and deceleration is produced by changing the amount of element overlap. Element overlap is changed by an overlap control mechanism that comprises a plurality of suitably positioned cam rails (85a and b; 87a, b, c and d; 89a, b, c and d; 90a and b; and, 91) and a plurality of cam followers. The cam followers include rollers (69, 75 and 81) and arms (61, 71) that link the handrail elements (57) together. The rollers ride on the cam rails. The coaction between the rollers and the cam rails causes the arms to fold and unfold, which folding and unfolding action changes the amount of handrail element overlap. The handrail elements are moved by a cable drive mechanism that includes a main drive cable (99) that is gripped by the overlap control mechanism along substantially the entire length of constant speed zones located between the zones wherein the handrail accelerates and decelerates. In addition, preferably, the handrail elements are moved in change-of-direction regions located at the ends of the oval track by large sprockets (93) that engage selected segments of the overlap control mechanism.
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Alexander Daniel
The Boeing Company
Valenza Joseph E.
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