Escalator Subframe for Truss Distortion Compensation
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Solution Overview
Problem
The existing escalator designs face challenges with truss distortions and non-straightness due to manufacturing and installation errors, leading to costly and time-consuming repairs.
Innovation Solution
A subframe with a lattice structure is attached to the truss to provide a high-quality support for outer cladding, ensuring straight and flawless installation, and allowing for easy replacement of cladding panels without screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If outer cladding is directly attached to the truss, then the structure is simpler, but manufacturing and installation errors cause distortions and non-straightness leading to costly repairs
Solution Approach 1:
A subframe is introduced as an intermediary component between the truss and the outer cladding. The subframe absorbs and compensates for truss distortions and non-straightness, allowing the outer cladding to be installed straight and true even when the underlying truss has manufacturing or installation errors. This mediator structure prevents costly repairs while adding only moderate complexity.
2Strength
If cladding panels are screwed to the truss, then the attachment is more secure, but replacement of worn-out or damaged panels is difficult and time-consuming
Solution Approach 1:
The attachment system is segmented into removable connections between the subframe and cladding panels, allowing individual panels to be easily replaced. The subframe provides the secure structural attachment to the truss, while the panel-to-subframe connections are designed for easy disassembly and reassembly, enabling rapid replacement of worn or damaged panels without affecting the overall structure.
3Reliability
If repairs are performed on distorted trusses, then the original structure is restored, but the process is expensive and time-consuming
Solution Approach 1:
The subframe acts as a mediator that compensates for truss distortions rather than requiring the truss itself to be repaired. By providing a separate, adjustable support structure between the truss and cladding, the system maintains structural reliability and visual appearance without needing to address the underlying truss distortions, thereby avoiding expensive and time-consuming repair work.
Data Source
AI summary
An escalator includes a truss formed of a support structure that bridges a lower landing and an upper landing of the escalator. The truss includes two rising side sections extending upwards from a bottom plane of the truss, the side sections extending along a length of the truss and being joined together with cross braces. The escalator includes a subframe attached to an outer side of at least one side section of the truss, the subframe being arranged to receive an outer cladding of the escalator.