Disassemblable Operator Cage for MEWPs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional operator cages for mobile elevating work platforms (MEWPs) are heavy, prone to damage, and have poorly designed access gates, leading to stability issues, corrosion, and safety hazards, such as collision risks when reversing with overhead obstructions.
Innovation Solution
A disassemblable operator cage with a lightweight plastic or composite base unit and fence assembly, featuring a hinged gate with self-closing mechanism and a raised rail portion for improved access and protection, along with crush sensors to prevent collisions and ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a welded steel cage structure is used, then strength and stability are improved, but weight increases and ease of repair deteriorates
Solution Approach 1:
The patent applies composite materials by combining a plastic base unit with metal fence assembly components. The base unit is made from corrosion-resistant plastic or composite material, while the fence assembly uses metal posts and rails. This composite approach reduces overall weight compared to fully welded steel construction while maintaining necessary strength and stability through the hybrid material structure.
Solution Approach 2:
The cage is divided into separable components: a base unit and a fence assembly that can be readily disassembled. The fence assembly includes separate posts, rails, and gate components that can be individually removed and replaced. This segmentation allows for easier repair and replacement of damaged parts without needing to replace the entire cage structure.
2Strength
If a welded steel cage structure is used, then strength is improved, but ease of repair deteriorates
Solution Approach 1:
The cage is divided into separable components: a base unit and a fence assembly that can be readily disassembled. The fence assembly includes separate posts, rails, and gate components that can be individually removed and replaced. This segmentation allows for easier repair and replacement of damaged parts without needing to replace the entire cage structure.
Solution Approach 2:
The design enables selective replacement of damaged components. If a fence post or rail is damaged, only that specific component needs to be replaced rather than the entire cage. The separable nature of the components allows for cost-effective repair by replacing only the damaged parts while recovering and retaining the undamaged portions of the cage structure.
3Ease of operation
If a sliding bar gateway is used, then access is provided, but safety deteriorates due to operator error
Solution Approach 1:
The gate incorporates a self-closing mechanism that automatically returns to the closed position after being opened. This self-service feature ensures that the gate closes without requiring operator intervention, thereby maintaining safety barriers even when operators may make errors. The self-closing action provides passive safety that operates independently of operator behavior.
Solution Approach 2:
The gate design includes preliminary safety features such as the self-closing mechanism and positioning of the gate to obstruct access to the control console when open. These features are built into the structure beforehand to prevent unsafe conditions, counteracting potential operator errors before they can occur. The gate's physical design makes it difficult to leave open, thereby preventing the safety hazard of unsecured access.
4Stability of the object's composition
If the cage is made heavier for stability, then structural stability is improved, but ease of transportation deteriorates
Solution Approach 1:
The cage is divided into separable components: a base unit and a fence assembly that can be readily disassembled. This segmentation allows the cage to be broken down into manageable parts for transportation, reducing the burden on the operator while maintaining structural integrity when assembled. The separate components can be handled more easily during transport and storage.
Solution Approach 2:
The base unit is made from plastic or composite material rather than traditional steel, reducing its weight while maintaining sufficient strength. This composite material approach decreases the overall weight of the cage structure, making it easier to transport and handle, while still providing the necessary stability and structural support when the cage is assembled and in use.
Data Source
AI summary
An operator cage for a machine such as a mobile elevating work platform comprises a base unit (22) and a fence assembly (25) releasably attached to the base unit, wherein the cage (6) is constructed and arranged to be readily disassembled for convenient transportation.