Drive system for escalators or moving walkways
AssigneeKone Corporation
InventorAlexander Pietz
Life of this patent
Estimating the term…
Abstract
A drive system for escalators having steps or moving walkways having pallets includes at least one drive motor. A drive chain is driven by the drive motor and is comprised of a plate link chain. The drive chain has such a pitch that a maximum of two links are used for each step or pallet. A mechanism for minimizing a polygon effect which occurs during entry and reversing of the chain at a reversing element includes at least one device for actuating one of the drive motor, the reversing elements or the drive chain with a non-constant rotational speed or velocity.
Claims17
A drive system for escalators having steps or moving walkways having pallets, comprising:
- at least one drive motor;
- at least one drive chain driven by the drive motor and comprised of a plate link chain, the drive chain having such a pitch that a maximum of two links are used for each step or pallet;
- a reversing element for the drive chain;
- means for minimizing a polygon effect which occurs during entry and reversing of the chain at the reversing element, the means for minimizing including at least one device for actuating one of the drive motor, the reversing element or the drive chain with a non-constant rotational speed or velocity, wherein the device comprises a power supply unit that drives the drive motor with a non-constant rotational speed;
- a control unit that cooperates with the power supply unit;
- and
- at least one sensor that detects a phase position of the reversing element and transmits measured phase values to the control unit for controlling the power supply unit.
A drive system for escalators having steps or moving walkways having pallets, comprising:
- at least one drive motor;
- at least one drive chain driven by the drive motor and comprised of a plate link chain, the drive chain having such a pitch that a maximum of two links are used for each step or pallet;
- a reversing element for the drive chain;
- means for minimizing a polygon effect which occurs during entry and reversing of the chain at the reversing element, the means for minimizing including at least one device for actuating one of the drive motor, the reversing element or the drive chain with a non-constant rotational speed or velocity, wherein the device comprises at least one gear pair in operative relationship with the drive motor and having a variable reference or pitch circle diameter whereby the reversing element can be driven with a non-constant rotational speed.
Dependencies are inferred from the claim text.