Double-Braided Arborist Rope Splicing via Core Extraction
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Solution Overview
Problem
Arborist climbing ropes face a dilemma in requiring both firmness and uniformity to function well with mechanical devices while also being easily spliceable, as existing ropes either compromise on firmness for splicing ease or are too tight to splice effectively.
Innovation Solution
A double-braided rope structure with a concentric core, where a portion of the core is selectively removed to allow splicing tucks, maintaining the rope's firmness and uniformity, and substituting the removed core with splicing tucks to facilitate easy splicing without compromising performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a firm and uniformly shaped rope is used to ensure quality performance with mechanical devices, then the rope firmness and dimensional uniformity are improved, but the rope becomes too tight to enable splicing
Solution Approach 1:
The rope construction is segmented into multiple functional layers: an inner core providing firmness, a first braided tubular sheath, and a second braided tubular sheath. This segmentation allows the core to maintain rope firmness while the sheath structure accommodates splicing operations without compromising overall performance
Solution Approach 2:
A portion of the core is selectively removed at the splicing location to create space for splicing tucks. This extraction enables the splicing process to proceed without compromising the firmness of the remaining rope structure, as the removed core portion is replaced by the splicing tucks that fill the created space
2Ease of manufacture
If the rope is made easily spliceable by removing core material, then splicing ease is improved, but the rope firmness and dimensional uniformity are compromised due to bulges
Solution Approach 1:
The rope structure is designed with local quality variations: the core volume is specifically controlled at 10-20% of total rope volume to provide optimal firmness, and the braided sheaths are configured with specific braid patterns and tensions to maintain dimensional uniformity. At splicing locations, selective core removal creates local modifications that enable splicing while the surrounding structure maintains overall firmness
Solution Approach 2:
The core volume parameter is precisely controlled within 10-20% of total rope volume to achieve the optimal balance between firmness and splicability. The braid density, strand configuration, and material composition are adjusted to maintain dimensional uniformity while accommodating the selective core removal necessary for splicing
3Ease of manufacture
If a double-braided rope structure is used to enable splicing, then splicing ease is improved, but bulges in the rope are commonly exhibited compromising firmness
Solution Approach 1:
The rope employs a nested structure with the inner core contained within the first braided tubular sheath, which is in turn contained within the second braided tubular sheath. This nested configuration allows the core to be selectively removed for splicing while the outer sheaths maintain the rope's external shape and dimensional uniformity, preventing bulges during splicing operations
Data Source
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AI summary
The present invention relates to an arborist's climbing rope comprising: a core (10); a first braided tubular sheath (20) disposed about the core (10); and a second braided tubular sheath (30) disposed about the first braided tubular sheath (20); the core is in the range of 10 to 20% of the total volume of the arborist's climbing rope.