Step Adapter for Rung Ladders with Platform and Lock
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Solution Overview
Problem
Rung ladders provide limited support area, leading to fatigue and stress on the feet and legs, especially when used at an angle, due to their narrow design and the need for stability, which existing extension devices often complicate in structure and manufacturing.
Innovation Solution
The step adapter, comprising a brace, platform, and lock elements, provides an increased support surface by attaching to a rung ladder, with optional safety and tray overlay features, made from lightweight yet strong materials like aluminum or injection-molded plastic, ensuring secure attachment and reduced stress on users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the rung width is increased to provide larger support area, then user comfort and reduced leg stress is improved, but the ladder stability and risk of sideways falling increases
Solution Approach 1:
The invention divides the support function into two separate components: the original narrow rung maintains ladder stability, while the added platform element provides extended support area. This segmentation allows each component to fulfill its specific function without compromising the other.
Solution Approach 2:
The step adapter acts as an intermediary device between the user's feet and the rung. It transfers the user's weight from the narrow rung to a wider platform, reducing stress on the legs while maintaining secure attachment to the stable rung structure.
2Area of moving object
If various devices are added to extend the size of rungs, then support area is increased, but device complexity and manufacturing difficulty increases
Solution Approach 1:
The step adapter merges multiple functions into a single integrated device: the platform element provides extended support surface, the brace element provides structural support, and the lock element provides attachment functionality. This consolidation simplifies the overall structure compared to separate components.
Solution Approach 2:
The step adapter is designed to be universally applicable to different rung types (round, semi-round, flat) and ladder configurations. The adjustable lock mechanism and adaptable brace design allow a single device to serve multiple purposes across various ladder types.
3Reliability
If standing on a narrow rung for extended period is required to maintain stability, then ladder stability is maintained, but user fatigue and stress on feet and legs increases
Solution Approach 1:
The invention extends the support from a one-dimensional narrow rung surface to a two-dimensional platform surface. This dimensional expansion provides ample foot placement area while maintaining the same attachment point on the rung, eliminating the need to compromise between stability and comfort.
Data Source
AI summary
Step adapters for a rung ladder to provide an increased support surface or area is described. In one embodiment, the step adapter includes a brace, a platform, a lock and a safety bar. The lock, safety bar and platform are provided to structurally engage or embrace a rung of a ladder, and the brace supports the adapter against the rails of a ladder so that in total the step adapter provides an extended step structure to ease standing on the ladder, especially for an extended period of time. In another embodiment, the step adapter includes brace, platform and lock sections, where the platform section side edges are configured to lock the step adapter in place on a rung of a ladder. A tray overlay is also described which when used in combination with the step adapter (which serves as a support) provides a service area for holding work-related items.