Breakaway Fall Indicator for Rope Grab Inspection
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Solution Overview
Problem
Existing fall protection systems lack a reliable and visual indicator to determine if a fall arresting force has been applied, which complicates the inspection and maintenance of safety harnesses.
Innovation Solution
A fall arrester with a break-away fall indicator that decouples from the brake lever upon experiencing a predetermined fall arresting force, providing a visual indication that the fall protection system has been subjected to a fall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no fall indicator is provided in the fall protection system, then the device complexity is reduced, but the ability to detect and measure fall events deteriorates
Solution Approach 1:
The fall indicator uses visual color changes or position changes to indicate fall events. The indicator is positioned to be visible in different orientations, allowing inspectors to quickly identify fall events through visual inspection without complex electronic sensors or indicators.
2Difficulty of detecting and measuring
If a fall indicator is added to the fall protection system, then the ability to detect fall events is improved, but the device complexity increases
Solution Approach 1:
The fall indicator uses visual color changes or position changes to indicate fall events. The indicator is positioned to be visible in different orientations, allowing inspectors to quickly identify fall events through visual inspection without complex electronic sensors or indicators.
3Stability of the object's composition
If the fall indicator remains attached to the brake lever after a fall event, then the structural integrity is maintained, but the ability to provide visual indication deteriorates
Solution Approach 1:
The fall indicator is designed as a separable component that can detach from the brake lever assembly. This segmentation allows the indicator to remain attached during normal operation for structural integrity, but to separate after a fall event to provide clear visual indication that the system has been subjected to fall forces.
Solution Approach 2:
The fall indicator utilizes the harmful fall forces to trigger its own detachment and activation. When excessive forces are applied during a fall event, these same forces cause the indicator to separate from the brake lever, converting the harmful fall forces into a beneficial visual warning signal that alerts inspectors to the fall event.
4Reliability
If inspection procedures are made more thorough to ensure safety, then the reliability is improved, but the loss of time increases
Solution Approach 1:
The fall indicator provides preliminary visual information about fall events before inspection begins. This allows inspectors to quickly identify which harnesses have experienced falls and need detailed inspection, versus those that can be quickly cleared, thereby reducing overall inspection time while maintaining thoroughness for affected equipment.
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 fall indicator effectively alerts users and inspectors that the fall protection system may have compromised safety integrity, facilitating timely inspection and replacement of affected components.
Implementation Method 1
When the fall arrester is subjected to a predetermined fall arresting force, the fall indicator may decouple from the brake lever, for example, by shearing.
Data Source
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AI summary
Apparatus and associated methods relate to fall arrester having a break-away fall indicator with an aperture aligned with an aperture of the fall arrester that supports a safety lanyard during a fall event. In an illustrative embodiment, the fall indicator may couple to a brake lever with a rivet, which may be a standard rivet, for example. The brake lever may be a component of a rope grab device. A lanyard may be secured through the aperture of the fall indicator and fall arrester with a carabiner, for example. When the fall arrester is subjected to a predetermined fall arresting force, the fall indicator may decouple from the brake lever, for example, by shearing. Upon being shed from its location, the fall indicator may advantageously indicate and alert persons (visually) that the fall protection safety harness has been subjected to a fall arresting force.