Wedge Opening Cord Tensioner with Sliding Support
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Solution Overview
Problem
Existing rope tensioning devices are often complex, expensive, or require knots, making it difficult to achieve sufficient tension in ropes used for securing loads or items.
Innovation Solution
A tensioning device with opposing wedge openings and a cord block that allows for the securement and sliding support of cord portions, enabling easy tensioning without knots or complex parts, providing a mechanical advantage for easier cord tightening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing rope tensioning devices are used, then sufficient tension can be achieved in the rope, but the devices have complicated parts and are expensive
Solution Approach 1:
The tensioning device is divided into two separate wedge openings (first and second wedge openings) that can independently secure different portions of the cord. This segmentation allows each wedge to perform a specific function (one for securing, one for tensioning) while keeping the overall structure simple and avoiding the need for complex multi-component systems.
Solution Approach 2:
Instead of using a traditional complex mechanical tensioning system, the invention inverts the approach by using simple wedge openings that rely on friction and geometry rather than complex mechanical components. The cord block with support surface also inverts the traditional approach by allowing the cord to slide freely rather than being constrained by complex mechanisms.
2Force
If existing rope tensioning devices are used, then sufficient tension can be achieved in the rope, but the devices are too expensive
Solution Approach 1:
The device is segmented into simple geometric features (wedge openings and support surface) that can be easily manufactured using basic machining or molding processes. This segmentation into simple functional elements reduces manufacturing complexity and cost compared to integrated complex tensioning mechanisms.
Solution Approach 2:
The tensioning device uses simple, inexpensive materials and structures that can be easily replaced if needed. The wedge openings and cord block are designed as simple components that do not require expensive materials or complex manufacturing, making the device cost-effective and suitable for applications where replacement is easier than repair.
3Force
If existing rope tensioning devices are used, then sufficient tension can be achieved in the rope, but they require knots to be tied
Solution Approach 1:
The invention extracts the knot-tying requirement from the tensioning process by using wedge openings that mechanically secure the cord through friction and geometry. The first wedge opening secures the cord without requiring knots, and the second wedge opening provides tensioning capability, eliminating the need for knot-tying operations entirely.
Solution Approach 2:
The wedge openings are designed to automatically secure and tension the cord through their geometric shape and friction characteristics. The cord itself serves to tension the device by being inserted into the wedge openings, eliminating the need for external knot-tying actions or additional securing mechanisms.
4Device complexity
If a simple cord securing method is used, then the device structure is simple, but sufficient tension cannot be achieved in the cord
Solution Approach 1:
The device segments the tensioning function into two separate wedge openings, where the first wedge opening provides securement and the second wedge opening provides tensioning capability. This segmentation allows each component to be simple in structure while collectively achieving sufficient tension through their coordinated geometry and friction characteristics.
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 device allows for efficient and straightforward tensioning of cords with a mechanical advantage, reducing the required strength to achieve desired tension, and can be easily adjusted or integrated into various securing setups.
Implementation Method 1
The first wedge opening is shaped to releasably secure a first portion of the cord. A second wedge opening is spaced apart from the first wedge opening. The second wedge opening is shaped to releasably secure a second portion of the cord.
Implementation Method 2
A cord block defines a support surface spaced from the first and second wedge openings. The support surface is positioned to slidably support the cord between the first and second wedge openings.
Implementation Method 3
The support surface is positioned to slidably support the cord between the first and second wedge openings.
Data Source
AI summary
A tensioning device includes a pair of opposing first surfaces defining a first wedge opening. The first surfaces are fixed relative to each other. The first wedge opening is shaped to releasably secure a first portion of a cord. A pair of opposing second surfaces defines a second wedge opening. The second surfaces are fixed relative to each other. The second wedge opening is spaced apart from the first wedge opening. The second wedge opening is shaped to releasably secure a second portion of the cord. A cord block defines a support surface spaced from the first and second wedge openings. The support surface is positioned to slidably support the cord between the first and second wedge openings.