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Step chain for passenger conveyor and its roller assembly

A passenger transport, stepped technology, applied in the direction of chain elements, rotating bearings, belts/chains/gears, etc., can solve the problems of limiting the lift height and passenger carrying capacity of the passenger transporter, and achieve the effect of prolonging the service life.

Inactive Publication Date: 2002-06-26
OTIS ELEVATOR CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the use of thermoplastic parts limits the loads on the stepped chain, thus limiting the rise height and passenger carrying capacity of the passenger conveyor

Method used

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  • Step chain for passenger conveyor and its roller assembly
  • Step chain for passenger conveyor and its roller assembly
  • Step chain for passenger conveyor and its roller assembly

Examples

Experimental program
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Embodiment Construction

[0022] As shown in FIG. 1, the escalator includes a frame 10, a drive unit 12, a plurality of treads 14 connected to stepped chains 16, and a pair of retaining walls 18 for guiding a pair of handrails 20. While an escalator may be used for the illustrated purpose, it should be noted that the invention is equally applicable to other passenger conveyors, such as moving walkways, that use stepped chains to drive multiple treads.

[0023] Generally, the frame 10 is constructed of structural steel weldments extending obliquely from a first level 30 to a second level 32 . As is conventional, frame 10 includes pairs of mating roller tracks (not shown) secured thereto. Half of each pair of roller tracks is fixed on the left side of the frame 10, and the other half is fixed on the right side of the frame 10. The frame 10 also forms the structural basis for the landings at each level. Thus, the frame 10 begins at the lower landing 28 at a first level 30 and then extends upwardly throu...

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PUM

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Abstract

A roller assembly for a passenger conveyor step chain includes a rolling contact bearing disposed between a bushing and an axle of the roller assembly. The rolling contact bearing improves wear resistance and load carrying capabilities of the roller assembly and step chain. In a particular embodiment, the roller assembly includes a pair of seals and a lubrication chamber. The seals define a sealed region encompassing the rolling contact bearing and lubrication chamber. The seals prevent lubrication from leaking and debris from penetrating into the sealed region.

Description

technical field [0001] This invention relates to stepped chains for passenger conveyors, and more particularly to roller assemblies for such stepped chains. technical background [0002] An escalator is a known device for transporting passengers from a first level to a second level. Typically, an escalator includes a frame, a drive, a stepped chain and a pair of retaining wall assemblies. The drive generally drives a stepped sprocket assembly including a pair of stepped sprockets, a pair of handrail sprockets and an arbor extending from one end of the frame to the other. Two stepped sprockets drive the stepped chain. [0003] The stepped chain forms an endless running loop from the first height to the second height. A stepped chain includes a pair of chains with multiple roller assemblies and a plurality of stepped arbors connecting the two chains. Each chain consists of multiple links. Each link has a pair of side plates, a roller assembly, and either a stepped arbor o...

Claims

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Application Information

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IPC IPC(8): B66B23/14F16C13/00F16G13/00
CPCB66B23/026B66B23/145F16C13/006F16G13/00F16C19/55
Inventor H·W·阿尔斯A·明塔B·格罗高
Owner OTIS ELEVATOR CO