Scaffold Railing Locking Element with Inverted Pivot Axis
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Solution Overview
Problem
Existing fastening devices for railing systems on three-dimensional frameworks, such as scaffolding, often fail to securely lock railings against upward lifting, leading to safety risks and increased operational effort, with many solutions either requiring high clamping forces, being prone to faulty functioning due to contamination, or complicating the assembly and disassembly process.
Innovation Solution
A fastening device for a three-dimensional framework that includes a mount with a rest element and a locking element, where the locking element is pivotable to securely lock the railing against vertical removal without clamping force, allowing for easy assembly and disassembly, and enabling installation and removal from the same or a lower scaffolding tier without requiring adjacent railing demounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking element is pivotable about a pivot axis positioned above the rest surface, then the railing device can be installed from below without requiring demounting of adjacent railings, but the device complexity increases
Solution Approach 1:
The pivot axis of the locking element is positioned above the rest surface instead of below it, inverting the conventional arrangement. This allows the railing device to be installed from below by pivoting the locking element upward, enabling installation without demounting adjacent railings while maintaining operational simplicity
Solution Approach 2:
The locking mechanism utilizes vertical pivoting motion about a horizontal pivot axis positioned above the rest surface, adding a dimensional aspect to the installation process that allows approach from below rather than requiring horizontal access at the same elevation
2Reliability
If a locking element is used to secure railing against vertical removal, then safety is improved, but the device complexity increases compared to simple insertion methods
Solution Approach 1:
The locking element utilizes its own weight and the gravitational force acting on it to automatically engage with the locking surface when positioned in the locked state, eliminating the need for additional springs, actuators, or complex engagement mechanisms while maintaining secure locking
Solution Approach 2:
The locking element and locking surface are designed with homogeneous material properties and simple geometric forms that facilitate reliable engagement through direct contact, avoiding the need for specialized materials or complex interaction mechanisms
3Ease of operation
If a pivotable locking element is implemented, then ease of operation is improved, but the reliability decreases due to potential faulty functioning from contamination
Solution Approach 1:
The pivot axis and locking element are positioned and designed to minimize contact with the external environment, effectively extracting the critical locking components from contamination-prone areas. The simplified geometry reduces crevices and surfaces where contaminants could accumulate and cause malfunction
Solution Approach 2:
The design modifies the geometric parameters of the locking element and pivot axis to create larger clearance gaps and smoother surfaces that are less susceptible to contamination, changing the physical parameters to improve reliability in dirty environments
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 a secure, easy-to-use, and efficient locking mechanism that ensures railing stability and safety while simplifying installation and removal processes, reducing the risk of accidents and operational complexity.
Implementation Method 1
the locking element is pivotable, preferably manually, about a pivot axis from an unlocking setting into a locking setting and conversely
Data Source
AI summary
The invention relates to a prop (32.1, 32.3) for a three-dimensional framework, particularly a scaffold (20), comprising a fastening mechanism (38) for attaching a railing device (28) to the prop (32.1, 32.3). The invention also relates to a connecting assembly for a railing device (28), comprising at least one prop (32.1, 32.3) for a three-dimensional framework, especially a scaffold (20), and a railing device (28) which can be attached to the prop (32.1, 32.3) with the help of a fastening mechanism (38). Also disclosed is a method for attaching a railing device (28) to a prop (32.1, 32.3) for a three-dimensional framework, especially a scaffold (20), with the help of a fastening mechanism (38). The fastening mechanism (38) encompasses a locking element which can be swiveled about a swivel pin. In the locked position, the locking surface of the locking element lies across from a bearing surface (43) of a support element that is mounted on the prop (32.1, 32.3). Furthermore, in the locked position and in the operational position of the prop (32.1, 32.3), the locking surface of the locking element is disposed at a vertical distance above the bearing surface of the support element, and/or in the operational position of the prop (32.1, 32.3), the swivel pin is placed at a vertical distance above the locking surface that is in the locking position, preferably also at a vertical distance above the bearing surface of the support element.