Securing Cable with Chain Core and Composite Braids
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Solution Overview
Problem
Conventional safety ropes for securing two-wheeled vehicles lack sufficient protection against theft, as they can be easily cut or damaged using tools like saws, bolt cutters, or diamond tools, and often compromise on flexibility and manufacturing costs.
Innovation Solution
A safety rope with three or more layers of braids or fabrics made of fibers or yarns, arranged one on top of the other, with a chain core, providing enhanced mechanical impact resistance, cut resistance, and protection against heat and cold, using non-crimp fabrics, braids, and woven fabrics with multifilaments or yarns for increased durability and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the strength (thickness) of the core cable is increased to improve protection against theft, then the tensile strength and cut resistance improve, but the flexibility is lost and the cable becomes almost rigid
Solution Approach 1:
The patent applies composite materials by combining multiple fiber types (aramid, polyester, polyethylene) with different properties in a single cable structure. Each fiber contributes specific characteristics: aramid provides tensile strength, polyester provides flexibility and weather resistance, and polyethylene provides cut resistance. This composite approach allows the cable to achieve high strength while maintaining flexibility without becoming rigid.
2Ease of operation
If high-quality material is used for all cable cores or cable strands to maintain flexibility without increasing cross-section, then the flexibility is maintained, but the manufacturing costs increase significantly
Solution Approach 1:
The patent applies local quality by assigning different material properties to different parts of the cable structure. Instead of using high-quality expensive materials throughout, the patent uses aramid fibers specifically in the core where tensile strength is most needed, while using more cost-effective polyester and polyethylene in outer layers where flexibility and cut resistance are prioritized. This localized material assignment maintains overall cable performance while significantly reducing manufacturing costs.
3Ease of manufacture
If a simple plastic sheath is used to protect the core cable, then the manufacturing costs are low, but the protection against theft is insufficient as the cable is easily accessible for attack with hacksaw or bolt cutter
Solution Approach 1:
The patent replaces the simple plastic sheath with a composite fiber structure consisting of multiple layers including aramid, polyester, and polyethylene fibers. This composite construction provides inherent resistance to cutting tools like hacksaws and bolt cutters without requiring additional protective coatings or complex manufacturing processes, thereby maintaining cost-effectiveness while significantly improving theft protection.
4Ease of manufacture
If conventional security strands are used, then the production costs are low, but the protection against saws, bolt cutters, tearing or diamond tools is insufficient
Solution Approach 1:
The patent employs a multi-layer composite structure with specific fiber types targeted at resisting different cutting mechanisms. Aramid fibers resist blade cutting, polyethylene fibers resist abrasion from diamond tools, and the overall braided structure resists tearing and bolt cutter attacks. This composite approach provides comprehensive tool resistance while maintaining production cost-effectiveness through the use of commercially available fibers and standard braiding processes.
Data Source
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AI summary
The invention relates to a securing cable comprising three, four or more braids, woven fabrics or laid scrims consisting of fibres or yarns and being disposed one on top of the other, wherein the securing cable has a chain as core. The structure of the securing cable according to the invention ensures not only improved protection against mechanical action, such as sawing, cutting with a bolt cutter or tearing, by the presence of the three, four or more braids or woven fabrics made up of fibres or yarns, but also improved cutting resistance with respect to sharp-edged objects, such as knives, for example, by the presence of the chain. The selection of the materials which are used for producing the laid scrims, braids or woven fabrics additionally allows effective protection against the action of heat, fire and cold.