Elevator Working Platform Lateral Stabilization
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Solution Overview
Problem
Elevator working platforms deployed from above the ceiling lack lateral stability due to their smaller cross-sectional size, which makes them prone to sway or tilt when suspended within the elevator car, posing safety risks for maintenance personnel.
Innovation Solution
The integration of stabilizing members with engagement portions that interact with pre-existing side wall engagement portions, such as handrails, to provide lateral stability, ensuring the working platform is securely positioned and resistant to horizontal movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the working platform is made smaller to fit within the elevator car, then the platform can be easily deployed without damaging side walls, but the platform loses lateral stability and becomes prone to sway or tilt
Solution Approach 1:
The patent introduces stabilizing members as intermediary elements that connect the working platform to the elevator car's side walls. These stabilizing members act as mediators that transfer lateral forces from the platform to the side walls, providing stabilization without requiring the platform itself to be larger. The stabilizing members include engagement portions that interface with corresponding portions on the side walls, creating a stable connection while maintaining the platform's compact size.
2Ease of operation
If the working platform is suspended within the interior space, then the platform is accessible for maintenance work, but the platform is not touching any surface and is subject to sway or tilt
Solution Approach 1:
The stabilizing members serve as intermediary elements that connect the suspended working platform to the stationary side walls. These intermediaries provide the necessary lateral support while allowing the platform to remain suspended and accessible for maintenance work. The engagement portions on the stabilizing members interface with corresponding portions on the side walls, creating stable connection points that prevent sway and tilt.
Solution Approach 2:
The patent addresses the stability problem by adding support in the lateral dimension rather than relying solely on vertical suspension. The stabilizing members extend laterally from the platform to engage with the side walls, providing stabilization in the horizontal plane. This dimensional approach allows the platform to remain suspended for accessibility while gaining lateral stability through side wall engagement.
3Stability of the object's composition
If engagement portions are added to the side walls for stabilization, then lateral stability is improved, but the device complexity increases
Solution Approach 1:
The engagement portions are designed to be multi-functional, serving both as structural attachment points for the stabilizing members and as integral parts of the side wall construction. By making the engagement portions part of the existing side wall structure rather than separate add-on components, the design achieves lateral stability without significantly increasing overall device complexity. The engagement portions can be formed during standard side wall manufacturing processes.
Solution Approach 2:
The stabilization system is segmented into modular components: stabilizing members with engagement portions that interface with corresponding portions on the side walls. This segmentation allows the stabilization function to be added independently of the main platform structure, enabling easier installation and maintenance while keeping the overall system complexity manageable. The engagement portions are distributed at strategic locations to provide stability without requiring a complete structural redesign.
Data Source
Figure 1a~1c
Figure 2a~2c
Figure 3a~3b
AI summary
An elevator car comprises one or more side walls (4a) defining an interior space for accommodating passengers and/or cargo, and a support frame positioned above the interior space. A working platform (12) is suspendably connected to the support frame and moveable between a stowed position, above the interior space, and an operational position, suspended within the interior space. The working platform (12) comprises at least one stabilizing member (14) and the at least one stabilizing member (14) comprises a first engagement portion (22). At least one side wall (4a) comprises a second engagement portion (6) such as a handrail. When the working platform (12) is in the operational position, the first engagement portion (22) is configured to engage with the second engagement portion (6) so as to stabilize the working platform (12) in the operational position.