Foldable Railing Connecting Element for Continuous Fall Protection
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Solution Overview
Problem
Existing foldable railings on walkways and working platforms lack secure handhold access in the transition area between the climbing aid and the platform, leading to a conditional gap in fall protection, which is often not utilized by operating personnel due to convenience and time concerns.
Innovation Solution
A mechanically coupled connecting element with two rotatably coupled partial elements, one pivoted to the railing handrail and the other to the climbing aid handrail, bridges the gap between the handrails in all angular positions, and can be designed with protruding segments for easier gripping and actuation, blocking the passage in the folded-down position to reduce fall risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a foldable railing is used to meet clearance dimensions when folded, then the vehicle can be moved in traffic, but there is a gap in fall protection in the transition area between the climbing aid and the walkway
Solution Approach 1:
The connecting element acts as an intermediary component that mechanically couples the railing handrail to the climbing aid handrail. This intermediary structure continuously bridges the gap between the two handrails in all angular positions of the foldable railing, providing uninterrupted fall protection without compromising the clearance dimensions when folded.
Solution Approach 2:
The connecting element is designed with rotatable joints that allow it to dynamically adapt to all angular positions of the foldable railing. The element maintains continuous handhold access whether the railing is in the folded position for traffic or in the erected position for work, providing reliable fall protection throughout the entire range of motion.
2Reliability
If the railing is erected in the working position, then fall protection is provided, but the passage opening becomes narrow and difficult to access
Solution Approach 1:
The connecting element incorporates a protruding tube segment with specific local geometric features (rectangular, semi-curved, or parabolic cross-section) that enhance gripability. This local quality modification makes the element easily accessible and grippable by operating personnel even when the passage opening is narrow in the erected working position.
3Reliability
If the connecting element bridges the gap between handrails, then continuous fall protection is achieved, but the structure becomes more complex
Solution Approach 1:
The connecting element is segmented into two partial elements that are rotatably coupled together. This segmentation allows each partial element to be simpler in structure while collectively achieving the complex function of bridging the gap and providing continuous fall protection in all angular positions of the foldable railing.
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 provides continuous, accessible fall protection in the working position and reduces the risk of accidental falls by ensuring the connecting element is always accessible and securely positioned, even in the narrowed passage when the railing is folded down.
Implementation Method 1
two partial elements (6, 7) which are rotatably coupled to one another in a joint
Implementation Method 2
the first partial element and, at a first end arranged distal to the joint, being a pivoted coupling to the handrail of the railing
Implementation Method 3
at least one of the two sub-elements is equipped on its long side facing away from the coupling of the connecting element to the handrail of the railing with a rectangular, semi-curved or parabolic tube segment protruding from the sub-element
Data Source
AI summary
The invention relates to a walking or working platform with a folding railing and access aid. The invention is intended to enable a positively guided, i.e., without additional operating action by personnel, safety of the transition area between the access aid and the railing. For this purpose, it is provided that a first handrail (2) associated with the folding railing (1) is mechanically coupled to a second handrail (3) associated with the access aid by means of a connecting element (4) which consists of two pivotally coupled (5) sub-elements (6, 7) and has a pivotally coupled connection (8) to the handrail (2) of the railing at a first end and a pivotally coupled connection (9) to the handrail (3) of the access aid at a second end, wherein the axes of rotation of the pivots (5, 8, 9) are aligned parallel to each other.