Diagonal Guard Rail with Hook Lock for Scaffolding
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Solution Overview
Problem
Existing scaffolding systems face challenges in safely and efficiently installing guard rails between levels, as known solutions require delicate and precise maneuvering, limiting the ease and speed of setup, especially when working at heights without initial fall protection.
Innovation Solution
A guard rail system with a diagonally extending rail element and a hook mechanism that allows for easy diagonal positioning and locking around upright elements, enabling single-person operation to secure the rail between levels, providing continuous fall protection during scaffolding erection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guard rails are installed from an underlying scaffolding to a level lying above, then fall protection is provided for the upper level, but the installation requires delicate and precise maneuvering by a single person
Solution Approach 1:
The guard rail element is designed to be movable between a first diagonal position (for insertion) and a second diagonal position (for locking). The locking means include a hook that can be placed laterally round the upright in the first position and engages in locking manner round the upright in the second position, allowing single-person operation without delicate maneuvering
Solution Approach 2:
The locking means automatically engage when the guard rail element is moved to the second diagonal position. The hook engages in locking manner round the second upright element, providing self-locking functionality that eliminates the need for precise manual positioning and securing
2Reliability
If guard rails are installed using hook-and-loop engagements at the extreme ends, then the guard rail can be secured to the scaffolding, but the operation becomes delicate and precise
Solution Approach 1:
The complex hook-and-loop engagement mechanism is replaced by a simplified hook-based locking means. The hook is provided at the distal outer end of the guard rail element, eliminating the need for delicate hook-and-loop engagements at extreme ends while maintaining reliable securing
Solution Approach 2:
The locking mechanism changes from a soft hook-and-loop system to a rigid hook engagement system. The hook engages in locking manner round the upright, providing both reliability and ease of operation through simple geometric engagement rather than friction-based securing
3Productivity
If the guard rail element extends diagonally between successive upright elements, then rapid installation is enabled, but the structural stability must be maintained
Solution Approach 1:
The guard rail element is positioned diagonally between successive upright elements to enable rapid installation. The locking means ensure stability by engaging the hook round the upright in the second diagonal position, maintaining structural integrity while allowing fast setup
Solution Approach 2:
The guard rail element is designed with predetermined diagonal positioning that aligns with the upright elements. The coupling means at the proximal outer end and locking means at the distal outer end are pre-configured to engage with the uprights, enabling rapid installation without complex alignment procedures while maintaining stability
Data Source
Figure 1~2
Figure 3A~3C
Figure 3D~3F
AI summary
A scaffolding comprises upright elements (100) which are placed at regular distances from each other and which extend in height direction for receiving successive scaffold sections one above another therebetween. The scaffolding is provided with a guard rail having at least one guard rail element (1). Said guard rail element extends diagonally between said successive upright elements. The guard rail comprises locking means at one end and coupling means (21) at the other end for a releasable connection to an upright element. Said locking means comprise a hook (23) which, in a first diagonal position of the guard rail element can be placed laterally round one of the upright elements and, in a second diagonal position engages in locking manner round said upright element, wherein the guard rail is locked in the second diagonal position of the guard rail element.