Rope Crossing Ring With Friction-Optimized Receiving Areas
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Solution Overview
Problem
Conventional rope crossing systems in rope play devices face challenges in maintaining secure and stable connections between rope strands, particularly during play or climbing operations, often requiring additional securing elements and increased material usage to prevent unintentional displacement.
Innovation Solution
A rope crossing system featuring a ring with radially extending receiving areas that accommodate rope strands, where the clear width of these areas is between 0.8 to 0.98 times the diameter of the rope strand, generating sufficient static friction for secure fixation without the need for additional securing elements, and allowing for smaller ring diameters and reduced material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional cloverleaf rings are used with wide diameter or additional securing elements to prevent displacement, then the security against unintentional displacement of the crossing point is improved, but the material usage and device complexity increase
Solution Approach 1:
The patent changes the critical parameter from ring diameter to receiving area clear width ratio. By optimizing the ratio of clear width to rope diameter (LW/D = 0.8 to 0.98), the invention achieves secure fixation with reduced material usage. This parameter optimization allows the ring to maintain reliability while minimizing material consumption.
Solution Approach 2:
The invention applies local quality by creating specifically shaped receiving areas with optimized clear widths only where the rope strands need to be held. Rather than making the entire ring wide, only the receiving areas have the necessary dimensions, allowing localized friction optimization without increasing overall ring size or material usage.
2Reliability
If conventional cloverleaf rings are used with wide diameter to create safe crossing points, then the wrap angle and security are improved, but the ring size and material consumption increase
Solution Approach 1:
The patent fundamentally changes the design parameter from ring outer diameter to receiving area clear width. By optimizing the clear width to rope diameter ratio (LW/D = 0.8 to 0.98), the invention achieves the necessary wrap angle and security without increasing the overall ring area, thus resolving the contradiction between reliability and ring size.
Solution Approach 2:
The ring is segmented into multiple receiving areas, each optimized for its specific function of holding a rope strand. This segmentation allows each receiving area to be precisely sized for optimal friction and security, while the overall ring remains compact, reducing total material usage while maintaining wrap angle security.
3Reliability
If additional securing elements are used to block displacement movement of the ring, then the security against unintentional displacement is improved, but the device complexity and production costs increase
Solution Approach 1:
The invention extracts and eliminates the need for additional securing elements by incorporating the displacement prevention function directly into the ring's receiving areas. The optimized clear width dimensions (LW/D = 0.8 to 0.98) create sufficient friction to prevent displacement without requiring separate blocking elements, thus reducing device complexity while maintaining security.
Solution Approach 2:
The ring serves itself by using its own optimized receiving areas to prevent displacement. The friction generated by the precisely dimensioned receiving areas (clear width to rope diameter ratio of 0.8 to 0.98) automatically blocks unintentional displacement movement, eliminating the need for external securing elements and reducing device complexity.
4Reliability
If the clear width of receiving areas is reduced to increase friction, then the fixation security is improved, but the ease of inserting rope strands decreases
Solution Approach 1:
The patent optimizes the clear width parameter to a specific range (LW/D = 0.8 to 0.98) that balances friction generation with insertability. This parameter optimization ensures the receiving areas are narrow enough to create sufficient friction for secure fixation but wide enough to allow practical insertion of rope strands, resolving the contradiction between reliability and ease of operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides a secure and cost-effective fixation of rope strands, maintaining the shape and safety of rope networks even at small wrap angles, reducing the risk of unintentional displacement and enhancing safety during climbing.
Implementation Method 1
This ensures that there is such a large amount of static friction between the ring and in particular the receiving area on the one hand and the cable strand on the other hand that the ring is firmly fixed on the two cable strands crossing each other in the ring.
Data Source
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AI summary
The present invention relates to a rope crossing for fixing rope strands to one another and to a rope play device comprising at least one rope crossing according to the invention. Furthermore, the invention relates to a method for manufacturing a rope crossing according to the invention and to a device with which the method for manufacturing the rope crossing according to the invention can be carried out.The rope crossing according to the invention serves to fix rope strands to one another and comprises at least two intersecting rope strands (20, 30) and a ring (10), wherein the ring (10) has an inner opening (12) which, in relation to the number of rope strands to be fixed, includes twice the number of substantially radially extending receiving areas (13) and in each pair of opposing receiving areas (13) a strand section of a rope strand (20, 30) forming a bay (21, 31) is received, so that the bays (21, 31) of intersecting rope strands are arranged on opposite sides of the ring (10). The ratio of the clear width LW of a receiving area to the diameter D of the rope strand that forms the bay (21, 31) in this receiving area is LW/D = 0.8 to 0.98.