Fall Protection Locking Mechanism With Redundant Inertial Braking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fall protection devices rely solely on a braking lever for deceleration during falls, which can lead to catastrophic failures if the lever malfunctions, and may cause accidental disengagement due to user error, resulting in inadequate safety and potential damage to the guide member.
Innovation Solution
A locking system with a secondary braking feature that operates independently of the braking lever, featuring a shock absorber and an inertial structure with a curved braking surface and grooves to increase friction, which engages with the guide member during falls, providing additional stopping force and reducing the risk of guide member damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single braking lever is used for fall protection, then the device complexity is reduced, but the reliability of fall protection decreases
Solution Approach 1:
The braking system is segmented into two independent components: a primary braking lever and a secondary inertial braking feature. Each component can independently engage the guide member, providing redundant fall protection. The segmentation allows the system to maintain high reliability while keeping each individual braking component relatively simple in design.
2Reliability
If the braking lever is made robust to prevent malfunction, then the reliability improves, but the ease of operation deteriorates due to increased risk of accidental engagement
Solution Approach 1:
The braking function is divided between two independent features with different engagement mechanisms. The primary braking lever requires deliberate user action, while the secondary inertial feature automatically engages only during falls. This segmentation allows each feature to be optimized for its specific function without compromising the other.
Solution Approach 2:
The secondary braking feature operates on inverted logic: instead of requiring user activation like the primary lever, it automatically engages when not normally active (during falls) and remains disengaged during normal operation. This inversion eliminates accidental engagement while maintaining reliability.
3Device complexity
If the braking lever alone is used for stopping, then the device complexity is minimized, but the object-generated harmful factors increase due to guide member damage
Solution Approach 1:
The braking force is segmented and distributed between two independent braking features. Both the primary braking lever and secondary inertial feature engage the guide member separately, distributing the stopping force and reducing concentrated stress that could damage the guide member.
Solution Approach 2:
The shock absorber is positioned to deform beforehand during fall arrest, cushioning the impact force before it reaches the guide member. This prior cushioning reduces the harmful effects on the guide member while maintaining effective fall protection.
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 secondary braking feature enhances the safety of fall protection systems by providing a redundant stopping mechanism, reducing the likelihood of guide member wear or breakage and ensuring continued operation even if the primary braking lever fails, while also preventing incorrect installation orientations.
Implementation Method 1
The braking lever includes a shock absorber configured to deform during a fall instance
Implementation Method 2
The secondary braking feature is an inertial structure configured to rotate into engagement with the guide member during the fall instance
Implementation Method 3
The braking surface of the secondary braking feature defines a curvature, such that the braking surface is able to grip the guide member
Data Source
AI summary
A locking system for fall protection and a method of manufacturing the same are provided. An example locking system includes a housing. The housing defines a guide path through which the housing is slideably attached to a guide member. The locking system also includes a braking lever having a braking end that is configured to engage the guide member. The braking lever includes a shock absorber configured to deform during a fall instance. The locking system further includes a secondary braking feature configured independent from the braking lever. The secondary braking feature is an inertial structure configured to rotate into engagement with the guide member during the fall instance. A corresponding method of manufacturing is also provided.