Scaffold Ladder Hook with Contoured Inner Edge for Universal Profile Attachment
Solution Overview
Problem
Existing multi-storey ladder devices are not universally adaptable to various scaffolding systems, particularly failing to securely attach to rectangular tubes, U-profiles, and round tubes of different sizes, and face challenges in assembly and reliability across different geometric conditions.
Innovation Solution
The ladder device features a suspension hook device with a specific inner edge contour geometry, including inclined first and second inner edge contour areas, a concave transition between third and fourth inner edge contour areas, and a convex outer edge contour, allowing for secure attachment to diverse scaffolding profiles. The hook device is designed for easy assembly and production, with a steel or plastic-coated steel construction for durability and economy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a steel ladder device with a simple hook unit is used, then the assembly is simple and production is economical, but the ladder device cannot be securely attached to various scaffolding profiles (rectangular tubes, U-profiles, round tubes of different sizes)
Solution Approach 1:
The hook device is designed with a specific inner edge contour geometry that enables it to securely attach to multiple types of scaffolding profiles including rectangular tubes, U-profiles, and round tubes of different sizes. This universal design allows a single hook device to perform the attachment function across diverse scaffolding systems without requiring different specialized hooks for each profile type.
2Ease of manufacture
If the inner edge contour geometry is simplified for easy manufacture, then production is economical, but the ladder device cannot accommodate scaffolding components with small radii or complex geometric conditions
Solution Approach 1:
The hook device features a specifically designed inner edge contour geometry with particular curvature characteristics in critical areas. This local geometric optimization allows the hook to accommodate scaffolding components with small radii while maintaining overall manufacturing simplicity. The contour is engineered to match the geometric conditions of various scaffolding profiles at the contact points.
3Reliability
If a conventional hook design is used, then the assembly process is simple, but the attachment reliability varies across different scaffolding systems and geometric conditions
Solution Approach 1:
The hook device incorporates a pre-engineered inner edge contour geometry that is specifically shaped to match the geometric conditions of various scaffolding profiles. This preliminary geometric design ensures that when the hook engages with the scaffolding component, the contact surfaces are already optimally aligned, providing reliable attachment without requiring complex assembly procedures or adjustments.
Data Source
Figure 1
Figure 2a~2c
Figure 3~5
AI summary
A platform ladder device for scaffolding, in particular for providing access to and from the platform in the passageway between scaffold levels, comprising two parallel, spaced-apart ladder stiles (12), ladder rungs connected parallel and spaced apart in the longitudinal direction between the ladder stiles (12), each with a hook attachment device (20) arranged at the upper end of the ladder stiles (12) with a hook unit (40) with which a scaffolding profile unit (60) can be partially gripped, wherein four inner edge contour areas (42, 43, 44, 45) are provided, characterized in that the third inner edge contour area (44) is arranged offset outwards relative to the second inner edge contour area (43), so that the contour areas (44, 45) are arranged in two offset planes, and the fourth inner edge contour area (45) is arranged substantially in the longitudinal direction of the hook attachment device (20).a fifth inner edge contour area (46) is present and is arranged essentially in the transverse direction (Q) of the suspension hook device (20).