Shuttle Clamping and Blocking Mechanism for Cable Safety
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Solution Overview
Problem
Existing climbing protection system shuttles are not suitable for use with cables secured to structures via intermediate supports, as they cannot be easily moved over these supports and may be inadvertently loaded in an inverted fashion by untrained users.
Innovation Solution
A shuttle design featuring a clamping member that moves between free and clamping positions to grip the cable, a blocking member that pivots between closed and open positions to facilitate cable removal, and an anti-inversion member that prevents inverted loading, ensuring secure attachment and easy removal from the cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shuttle is designed with a simple guiding mechanism, then the ease of operation is improved, but the shuttle cannot be moved over intermediate supports
Solution Approach 1:
The guiding mechanism incorporates a movable blocking member that can dynamically change position between blocking and non-blocking states, allowing the shuttle to adapt to different operational requirements (moving over supports vs. preventing removal) without adding permanent structural complexity
2Ease of operation
If the shuttle allows easy cable removal, then the ease of operation is improved, but the cable may be inadvertently removed during use
Solution Approach 1:
The blocking member is spring-biased to automatically engage and block cable removal, requiring deliberate user action (pressing the release button) to disengage it. This self-blocking mechanism ensures the cable cannot be accidentally removed while maintaining easy intentional removal capability
3Ease of operation
If the shuttle accepts cable from any direction, then the ease of operation is improved, but the shuttle may be loaded in an inverted fashion
Solution Approach 1:
The guiding mechanism features an asymmetric blocking member with a specific geometry that only allows cable insertion in the correct orientation. The blocking member's shape and positioning create a one-way access that physically prevents inverted loading while maintaining simple cable insertion from the correct direction
4Reliability
If multiple mechanisms are added to prevent inadvertent removal, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The blocking member integrates multiple functions into a single component: it blocks cable removal, provides a release mechanism interface, and works with the clamping member to control shuttle operation. This merging approach achieves reliable inadvertent removal prevention without proportionally increasing device complexity
Data Source
Figure 1
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AI summary
A shuttle (20) for a climbing protection system (10) is provided and includes a clamping member (26) mounted on a frame (22) for movement between a free position wherein the shuttle (20) can move freely along an elongate support member (12) and a clamping position wherein the clamping member (26) resists movement of the shuttle (20) relative to the elongate support member (12), and a blocking member (28) mounted on the frame (22) for movement between a closed position blocking removal of the elongate support member (12) and an open position where the blocking member (28) does not block removal of the elongate support member (12). The clamping member (26) is movable to an opening position wherein the clamping member (26) operably engages the blocking member (28) to move the blocking member (28) from the closed position to the open position.