Single Rope Safety Device with Cammed Groove and Segmented Clamping
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Solution Overview
Problem
The single-rope technique for ascending and descending in climbing activities lacks control, particularly experiencing sudden drops and jerks due to the rope wrap method, which can be unsettling and unsafe.
Innovation Solution
A safety device with a clamping mechanism and reduction mechanism that includes a flexible spine and cammed groove to maintain control by misaligning and realigning rope channels, providing frictional engagement to prevent sudden drops and allow smooth descent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rope wrap method is used to control descent in single-rope technique, then frictional engagement is increased to slow descent, but sudden drops and jerks occur when the release mechanism is actuated
Solution Approach 1:
The clamping mechanism is divided into multiple clamping segments (first clamping segment, second clamping segment) that can independently engage and disengage the rope. This segmentation allows one segment to maintain control while another is being adjusted, eliminating sudden drops by ensuring continuous frictional engagement throughout the descent process.
Solution Approach 2:
The release mechanism is designed to preliminarily align the rope channels of adjacent clamping segments before actuation. This preliminary alignment ensures that when the release mechanism is activated, the rope transitions smoothly from one clamping segment to another without sudden movements or jerks, maintaining continuous control during descent.
2Ease of operation
If the single-rope technique is used without mechanical advantage, then ease of operation is improved by eliminating the need for complex rope systems, but control during descent deteriorates due to lack of frictional engagement
Solution Approach 1:
The clamping mechanism introduces localized frictional engagement at specific points along the rope through the clamping segments. This local quality enhancement provides the necessary control during descent while maintaining the overall simplicity of the single-rope system. The friction is applied only where needed (at the clamping segments) rather than requiring a complex mechanical advantage system throughout.
Solution Approach 2:
The clamping segments act as intermediary elements between the user's weight and the rope. These intermediaries provide the necessary frictional engagement to control descent speed without requiring a complex mechanical advantage system. The clamping segments mediate the force transmission, allowing controlled descent while maintaining the simplicity of the single-rope technique.
3Adaptability or versatility
If the clamp is released to allow descent, then mobility is improved by enabling movement to new positions, but safety deteriorates due to uncontrolled rapid descent
Solution Approach 1:
The dual clamping segments are designed to maintain continuous frictional engagement with the rope throughout the descent process. As one segment releases to allow movement, the other segment maintains control, ensuring continuous useful action in terms of frictional engagement. This continuity prevents uncontrolled rapid descent while enabling smooth transitions to new positions.
Solution Approach 2:
The release mechanism dynamically transitions the system from a fully clamped state to a controlled descent state. The cam mechanism provides dynamic control by gradually reducing frictional engagement rather than abrupt release. This dynamic transition allows the user to safely change positions while maintaining control over descent speed through the coordinated action of the two clamping segments.
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 eliminates sudden drops and jerks, ensuring controlled movement and reducing user anxiety by maintaining consistent frictional engagement during ascent and descent, allowing for a range of descent speeds and improved user control.
Implementation Method 1
The cammed groove is rotatably aligned with the rope slot. The reduction mechanism is configured to frictionally engage the single rope in the released position.
Data Source
AI summary
A device for ascending or descending using the single rope technique. The device includes a clamping mechanism that has a plurality of clamping segments interconnected by a flexible spine arrangement. A release mechanism is coupled to the clamping mechanism. A reduction mechanism is coupled to the release mechanism. The reduction mechanism includes a body portion having a rope slot configured to accommodate the single rope and a housing portion disposed over the body portion. The housing portion includes a cammed groove configured to accommodate the single rope. The cammed groove is rotatably aligned with the rope slot. The reduction mechanism is movable with at least two degrees of freedom between the clamping position and the released position. The reduction mechanism is configured to frictionally engage the single rope in the released position.