Platform Screen Door Built-in Raiser Sill
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Solution Overview
Problem
Current station platform edge screen door modules require extensive and costly preparation of the platform ground level, including excavation, to secure the screen door modules and match the vehicle floor level, which complicates access for passengers, especially those with reduced mobility.
Innovation Solution
A screen door module with a built-in sill that includes a raiser to fill the height difference between the platform and vehicle floor, and an access ramp for easy boarding, allowing the module to be installed on unmodified ground without special preparation, and featuring a technical compartment and optional features like emergency doors and insulating materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the screen door module is installed using conventional methods requiring excavation and ground-level preparation, then the screen door can be securely mounted, but the installation process becomes extensive, expensive, and time-consuming
Solution Approach 1:
The sill incorporates a built-in raiser that pre-establishes the required height differential between the platform ground level and the vehicle floor. This preliminary structural feature eliminates the need for post-installation ground preparation or excavation, allowing the screen door module to be directly mounted on the existing platform surface while maintaining secure mounting and proper height alignment
Solution Approach 2:
The raiser and the sill are merged into a single integrated structural element. The raiser is built-in to the sill, creating a unified component that simultaneously provides both the mounting base and the height adjustment function, thereby simplifying the installation process while ensuring reliable mounting
2Ease of operation
If the ground level is raised to match the vehicle floor level, then access for passengers is improved, but extensive preparation work and excavation are required
Solution Approach 1:
Instead of modifying the horizontal ground level across the entire platform, the solution introduces vertical dimensionality through the built-in raiser. The raiser creates a localized height elevation only where needed at the screen door module, achieving the required alignment with the vehicle floor without the need for extensive platform-wide ground raising or excavation work
Solution Approach 2:
The height adjustment is applied locally at the screen door module location through the built-in raiser, rather than modifying the entire platform ground level. This localized approach improves passenger access at the critical boarding point while avoiding the extensive preparation work that would be required for global ground-level modification
3Ease of manufacture
If a raised sill is incorporated to fill the height difference, then the need for ground-level preparation is eliminated, but the sill structure becomes more complex
Solution Approach 1:
The raiser and sill are merged into a single integrated component. This combination eliminates the need for separate ground preparation works while the modular design of the integrated structure keeps the complexity manageable. The unified component can be manufactured as a single unit or pre-assembled module, offsetting the structural complexity with manufacturing efficiency
Data Source
AI summary
A screen door module for a platform edge of a vehicle station. The module includes a leaf that moves between open and closed positions, a fixed element to which the leaf is mechanically connected and along which it slides and a sill extending under the leaf and under the fixed element. The module also includes a raiser with a predetermined height extending under the leaf and the fixed element and being arranged in such a way as to be laid on a finished ground level of the platform and so the predetermined height corresponds to a difference between the finished ground level and the floor of the vehicle when the latter comes to a standstill alongside the module. An access ramp on the platform side runs along the entire length of the module and allows access to passengers of limited mobility.