Asymmetric Pipe-End Crimping for Compact Scaffold Stacking
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Solution Overview
Problem
Existing scaffold ladder frames face issues with flattened ends that flare in both directions, causing walkboards to lift and weakening weld joints, necessitating improved methods for stacking and weld strength.
Innovation Solution
The implementation of asymmetrically flattened sections on horizontal supports and rungs, along with a crimping tool to form pipes with elongated cross-sections, allowing for compact stacking and maintaining weld integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the ends of horizontal members are flattened to facilitate stacking, then stacking compactness is improved, but the flattened ends flare in both directions causing walkboards to lift
Solution Approach 1:
The patent applies asymmetry by flattening the end of the horizontal member in only one direction (downward) rather than both directions. This creates an asymmetric profile where one side of the end is flattened while the other side remains elevated, preventing the flaring that causes walkboards to lift while still enabling compact stacking.
Solution Approach 2:
The patent applies local quality by selectively flattening only the downward-facing portion of the horizontal member end while leaving the upward-facing portion unchanged. This localized modification allows the end to provide stacking surface area without creating the bidirectional flaring that destabilizes walkboards.
2Volume of moving object
If the ends of ladder rungs are flattened to the same extent as main horizontal members, then stacking is facilitated, but weld joint strength is reduced
Solution Approach 1:
The patent applies local quality by differentiating the flattening extent between main horizontal members and ladder rungs. Main horizontal members receive full flattening for optimal stacking, while ladder rungs receive reduced or no flattening to preserve weld joint strength. This selective approach allows each component to be optimized for its specific function.
Solution Approach 2:
The patent applies partial action by applying less flattening to ladder rungs than to main horizontal members. Since ladder rungs are less critical for stacking and more critical for structural integrity, the patent uses partial flattening (or no flattening) on rungs while using full flattening on main horizontal members, achieving adequate stacking performance without compromising rung weld strength.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables efficient stacking with reduced vertical space consumption and enhanced weld strength, ensuring walkboards lie flat and joints remain robust.
Implementation Method 1
compressing the end portion to form an asymmetrically flattened end with an elongated cross-section
Implementation Method 2
compressing the end portion to form an asymmetrically flattened end with an elongated cross-section
Data Source
AI summary
A scaffold includes first and second ladder frames. Each ladder frame includes first and second vertical supports, and first and second horizontal supports mounted to the vertical supports. The first horizontal support is formed of tubular material, and has a base or central section and an asymmetric flattened end section. The end section is mounted to the first vertical support. The central section has a top centerline and a bottom centerline. The end section has a vertically elongated cross section compared to the central section. A top of the end section aligns with the top centerline of the central section; and a bottom of the end section is disposed below the bottom centerline of the central section. Related methods and tools are also disclosed.