Cable Release System for Hold Open Rod Mechanisms
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Solution Overview
Problem
The elevated position of unlocking mechanisms in hold open rods and latch mechanisms poses a safety hazard and slows the operation of closing components, as personnel need to use ladders to access and operate these mechanisms.
Innovation Solution
A cable release system with an actuator and handle connected to a cable that extends to the unlocking mechanism, allowing personnel to remotely operate the mechanism without direct access, featuring a Bowden cable for mechanical force transmission and adjustable tension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the unlocking mechanism is positioned at an elevated location to support large components, then the hold open rod can support considerable weight and hold open large components, but personnel cannot easily reach and operate the unlocking mechanism without mounting a ladder
Solution Approach 1:
A cable system acts as an intermediary between the operator's hand and the elevated unlocking mechanism. The cable transmits mechanical force from the operator's hand over a distance to actuate the unlocking mechanism without requiring direct physical contact with the elevated component.
Solution Approach 2:
The solution transitions from direct vertical access to the elevated mechanism to remote horizontal access through the cable system. The operator can remain at ground level while the cable extends vertically to reach the unlocking mechanism, effectively changing the dimensional approach to operation.
2Ease of operation
If personnel use a ladder to reach the elevated unlocking mechanism, then they can operate the mechanism, but this creates a safety hazard and slows down the operation process
Solution Approach 1:
The cable serves as a safe intermediary that eliminates the need for personnel to physically ascend to elevated positions. Force transmission occurs through the cable medium rather than direct manual operation, removing the safety hazard of ladder use.
Solution Approach 2:
The direct mechanical interaction between personnel and the elevated mechanism is replaced by a cable-mediated mechanical system. This substitution allows force transmission without direct contact, improving safety while maintaining operational capability.
3Ease of operation
If the unlocking mechanism is placed at ground level for easy access, then personnel can easily operate it, but the hold open rod cannot support large components at elevated positions
Solution Approach 1:
The cable system enables the unlocking mechanism to remain at the elevated position required for supporting large components, while simultaneously providing ground-level accessibility for operation. The cable mediates between these two conflicting requirements.
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
Enables safe and efficient operation of hold open rods and latch mechanisms by allowing personnel to unlock them from a lower position, reducing the need for ladders and enhancing operational speed.
Implementation Method 1
A cable release system with an actuator and handle connected to a cable that extends to the unlocking mechanism, allowing personnel to remotely operate the mechanism without direct access
Data Source
AI summary
A cable release system configured to unlock a hold open rod mechanism or latch mechanism includes an actuator having a handle and a cable attachment. The cable release system also includes a cable connected at one end to the actuator and at another end to an unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the actuator being configured to move the cable and operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the actuator and the handle being configured to be moved by personnel to move the cable and operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The cable release system also includes the cable attachment including a lower slide and a release slide.