Scaffold Bracket Hook Prevents Rotation
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Solution Overview
Problem
Existing scaffolding mounting brackets lack sufficient protection against rotation and accidental lifting, making them unsafe for workers during assembly and use, as they can be easily hung or twisted incorrectly.
Innovation Solution
A mounting bracket with a cantilever arm and a holding device featuring an engagement hook that encompasses the vertical frame by over 180°, a stop element for stabilization, and a support element for secure positioning, requiring a combined translational and rotational movement for correct attachment, preventing accidental loosening or lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple hook is used to attach the mounting bracket to the vertical frame, then the device complexity is reduced and ease of manufacture is improved, but the reliability and safety against accidental lifting and rotation deteriorate
Solution Approach 1:
The holding device is divided into multiple functional elements: an engagement hook for attaching to the vertical frame, a stop element to prevent over-rotation, and a guiding contour to control the attachment movement. This segmentation allows each element to perform its specific safety function while maintaining overall simplicity in manufacturing.
Solution Approach 2:
The guiding contour is designed to force a specific tilted and twisted position during installation before the mounting bracket can be properly attached. This preliminary action ensures that the bracket is correctly positioned and prevents accidental lifting or improper installation before the worker even completes the attachment process.
2Reliability
If additional safety elements like stop elements and guiding contours are added to prevent rotation and lifting, then the reliability and safety are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The stop element, engagement hook, and guiding contour are merged into a single integrated holding device that is attached to the mounting bracket. This consolidation provides multiple safety functions (preventing rotation, controlling attachment path, and securing to the frame) without requiring separate components, thereby limiting device complexity while improving reliability.
Solution Approach 2:
The holding device serves multiple functions simultaneously: the engagement hook attaches the bracket to the vertical frame, the stop element prevents over-rotation, and the guiding contour ensures correct positioning during installation. This multi-functionality provides comprehensive safety without adding separate dedicated components for each function.
3Reliability
If the engagement hook encompasses the tube by more than 180°, then the protection against lifting and rotation is improved, but the ease of operation and installation speed may deteriorate
Solution Approach 1:
The guiding contour is designed to force a specific tilted and twisted position during installation, creating a preliminary action that guides the worker through the correct attachment sequence. This ensures that even though the hook encompasses more than 180°, the installation remains straightforward because the contour dictates the movement path, preventing incorrect installation attempts.
Solution Approach 2:
The combination of the engagement hook's geometric configuration and the guiding contour creates a self-guiding attachment mechanism. The contour automatically directs the mounting bracket into the correct position as it is being attached, and the hook's shape itself provides the mechanical constraint that prevents lifting and rotation without requiring additional active control mechanisms.
Data Source
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AI summary
The invention relates to a mounting bracket (100) for scaffold boards for detachable connection to a tube of a vertical frame. The mounting bracket has a projection arm (1) for receiving a scaffold board and a holding device (2) for attaching the mounting bracket to the tube of the vertical frame. The holding device (2) comprises an end element (21) and an engagement hook (22). The engagement hook (22) is arranged at the top of the holding device in an end position of the mounting bracket (100). The engagement hook (22) encompasses the tube in the direction of the longitudinal axis by 180° on each side and has an engagement end (221) at its end. The engagement end (221) of the engagement hook (22) has an end distance A1 to the end element (21) in the direction of the longitudinal axis, which is less than a hook distance H2 of the engagement hook (22) to the end element (21) along the longitudinal axis L.The end element (21) has a guide contour F which is designed such that a guide distance A3 between the guide contour F and the engagement end (221) is at least equal to or greater than the hook distance H2 of the engagement hook 22 to the end element (21) along the longitudinal axis L, so that the fastening bracket (100) can only be hooked onto the vertical frame in a position tilted and rotated towards the end position.