Conveyors: power-driven – Conveyor or accessory therefor specialized to convey people – With means to control the operation of the section
Patent
1997-02-21
1998-10-13
Valenza, Joseph E.
Conveyors: power-driven
Conveyor or accessory therefor specialized to convey people
With means to control the operation of the section
B66B 502
Patent
active
058199020
ABSTRACT:
An arrangement is provided for monitoring at least one of raising and lowering of individual steps of a band of steps of an escalator The escalator includes guide rails for the steps, a driving gear, and endless driving chains provided in a region of balustrade bases and being driven by the driving gear. The guide rails have a transition curve from a horizontal run to a vertical run. Each step includes rollers supported on the guide rails and is held between the endless driving chains. A safety device is disposed essentially in the transition curve for switching off the driving gear. The safety device comprises a spring-activated first component positioned below the band of steps at a predeterminable distance to the continuously running steps and extending in a direction of the steps; a switch-off device coupled to the driving gear for switching off the driving gear, the first component being operatively coupled to the switch-off device; and a second component disposed in a region of the steps and being responsive to a raising or lowering of one of the steps in the transition curve for causing deflection of the first component, which deflection activates the switch-off device for switching off the drive gear.
REFERENCES:
patent: 4638901 (1987-01-01), Lunardi
patent: 4863006 (1989-09-01), Kotkata et al.
JP-A-53-16290, Abstracts of Japan.
Schoneweiss Klaus
Welnic Jerzy
O&K Rolltreppen GmbH & Co. KG
Tran Khoi H.
Valenza Joseph E.
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