Seamless Multilayer Webbing Loop for Climbing Quickdraws
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Solution Overview
Problem
Rock climbing quickdraws with pre-sewn webbing loops face issues of seam weakness under stress and lack of internal wear indication, posing safety risks due to potential seam breakage and unnoticed wear.
Innovation Solution
A seamless webbing loop with multiple tubular layers and an indication layer, either solid or hollow with a warning sign, is woven using a textile machine to enhance strength and provide timely wear reminders, eliminating seams and ensuring safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a pre-sewn webbing loop is used to connect carabiners, then the quickdraw is easy to produce and low cost, but the seam becomes weak under stress and may break due to stress concentration
Solution Approach 1:
The invention extracts and eliminates the seam from the webbing loop by using a seamless tubular fabric structure. The tubular fabric is cut axially to form the loop, removing the weak sewn joint entirely while maintaining ease of production through continuous fabric manipulation.
Solution Approach 2:
The webbing loop is segmented into multiple tubular layers stacked together, with each layer contributing to the overall strength. This segmentation allows the load to be distributed across multiple layers rather than concentrated at a single seam location.
2Strength
If a multi-layered webbing loop structure is used to enhance strength, then the webbing loop becomes stronger, but internal wear cannot be detected and users are not timely reminded of replacement
Solution Approach 1:
The invention uses color changes as a visual indicator system. The innermost layer or a specific layer is dyed in a contrasting color or contains a warning pattern that becomes visible when the webbing wears through to that layer, providing immediate visual feedback on wear status.
Solution Approach 2:
The indication layer acts as an intermediary between the structural webbing layers and the user. It mediates the transmission of wear information from the internal multi-layer structure to the user's visual perception, enabling timely detection without requiring disassembly.
3Strength
If a seamless tubular fabric structure is used to eliminate seams, then the webbing loop strength is improved, but the manufacturing process becomes more complex
Solution Approach 1:
Instead of creating a seamless loop from flat webbing through complex forming processes, the invention inverts the approach by cutting the tubular fabric axially along its length. This simple axial cutting method naturally produces a seamless loop while maintaining manufacturing simplicity.
Data Source
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AI summary
The present invention discloses a seamless webbing loop of a rock climbing quickdraw, a textile machine and a textile method. The seamless webbing loop of a rock climbing quickdraw contains a plurality of tubular webbing layers, one surrounded by another, among which there is at least one indication layer. The indication layer is adjacent to the outermost one among the plurality of tubular webbing layers or is the innermost one among the plurality of tubular webbing layers. Such a multilayered structure of the webbing loop enhances the strength of the webbing loop for the quickdraw, but does not cause a seam to the webbing loop. Further, the indication layer contained in the webbing loop functions to remind a user of timely replacement of the webbing loop when the webbing loop is worn, and thus the webbing loop is safe in use. With the movable spindle assembly arranged on the textile machine, it is convenient to remove the webbing loop from the textile machine. In addition, the webbing loop disclosed in the present invention has a simple structure without any seam, and is strong, safe and durable.