Escalator Step Composite Design for Weight and Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing escalator steps pose a risk of user entrapment during transitions between horizontal and inclined movements and are heavy, leading to increased energy consumption and noise due to their material composition.
Innovation Solution
The escalator step features two surfaces with distinct mechanical properties: a high-friction steppable surface for stability and a low-friction riser surface to reduce entrapment risk, manufactured using composite materials, resin transfer molding, or aluminum casting with coatings, which also facilitates easier disassembly and reduced weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal components are used for escalator steps, then strength and rigidity are improved, but weight increases leading to higher energy consumption
Solution Approach 1:
The patent employs composite materials consisting of a plastic matrix reinforced with fibrous materials (such as glass, carbon, or aramid fibers) to manufacture escalator steps. This composite construction provides strength comparable to metal while significantly reducing the weight of the steps, thereby lowering the moving mass and associated energy consumption without compromising structural integrity.
2Duration of action of stationary object
If grooved surfaces are made from metal or hard materials, then wear resistance is improved, but coefficient of friction increases causing entrapment risk
Solution Approach 1:
The patent applies different surface characteristics to different areas of the step. The grooved surfaces are designed with controlled friction coefficients that balance wear resistance with safety. Specifically, the grooves provide mechanical interlocking for durability while the overall surface friction is optimized to prevent shoe entrapment during transitions between horizontal and inclined sections.
Solution Approach 2:
The patent modifies the friction coefficient parameter of the step surfaces through material selection and surface treatment. By controlling the coefficient of friction within specific ranges, the design achieves both adequate wear resistance and reduced entrapment hazard, representing a parameter optimization that resolves the contradiction between durability and safety.
3Strength
If heavy metal materials are used, then structural strength is improved, but operating noise increases
Solution Approach 1:
The patent replaces heavy, noise-generating metal components with lighter plastic composite materials that inherently reduce operational noise. The composite structure provides sufficient strength while eliminating the noise associated with metal-on-metal contact and movement, thereby reducing harmful operating factors without sacrificing structural requirements.
Data Source
Figure 1~2
Figure 2A~3
Figure 3A~3B
AI summary
The present invention relates to an escalator step having: a first surface (1) in a steppable area having a material with a coefficient of friction between 0.3 and 0.8 for increasing passenger stability; a bearing structure (2) of the first surface (1) for: supporting the first surface (1); housing first connection devices (3) to drive systems (30). The step makes it easier to disassemble the components, reduce operating noise, improve the strength of the step and provide a skirting board that is more rigid against side loads.