Folding Scaffold Guardrail Joint for Uneven Ladder Deployment
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Solution Overview
Problem
Existing scaffolding systems face challenges in providing a better user experience without compromising safety, particularly during deployment when temporary height differences between ladder planes induce stress on the guardrail, requiring complex mechanisms or multiple-person operation.
Innovation Solution
A scaffolding system with a guardrail post that can rotate and translate relative to the ladder post, allowing it to absorb height differences, combined with a folding base that enables single-person deployment and automatic locking mechanisms for ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid guardrail is used, then structural strength is improved, but stress absorption during deployment deteriorates
Solution Approach 1:
The guardrail assembly is segmented into multiple components: guardrail uprights, ladder uprights, and joining elements. This segmentation allows the rigid guardrail structure to be combined with flexible connection mechanisms, enabling both strength and stress absorption during deployment.
Solution Approach 2:
The joining elements provide variable constraints that change during deployment. The partial constraints allow movement in certain directions while maintaining rigidity in others, enabling the guardrail to transition from a fully rigid state to a state that absorbs deployment stresses through controlled movement.
2Reliability
If complex mechanisms are used to absorb stress, then safety is improved, but device complexity increases
Solution Approach 1:
The joining elements automatically absorb deployment stresses through their partial constraint design without requiring active control mechanisms or complex devices. The system self-adjusts during deployment, allowing single-person operation while maintaining safety.
3Reliability
If multiple persons are required for deployment, then safety is improved, but ease of operation deteriorates
Solution Approach 1:
The partial constraint joining elements enable the guardrail assembly to self-adjust and absorb stresses during deployment, eliminating the need for multiple operators. A single person can safely deploy the scaffolding system while the joining elements automatically manage the mechanical stresses.
Data Source
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AI summary
A scaffolding system (1) comprising - two sets of ladders (10, 11) facing each other, the sets of ladders being capable of moving from a retracted state to an extended state in order to raise a platform set (30) and a guardrail set (20) and each comprising locking means arranged to prevent a return of said set of ladders to the retracted state from a plurality of locking positions defining a locking pitch, and - the guardrail set, said set comprising at least one guardrail upright assembled to a corresponding ladder upright by a partial connection such that, when only one of the sets of ladders is being extended, the guardrail upright is set in motion relative to the ladder upright, said motion continuing at least until the difference in heights between the sets of ladders reaches the locking pitch, in order to compensate for this difference in height.