Rotating Cam Fall Arrester for Panic-Triggered Rope Locking
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Solution Overview
Problem
Existing fall arresters do not effectively lock onto the rope when the user grabs them, especially during panic situations, which can lead to unsafe consequences during falls at heights.
Innovation Solution
A fall arrester design featuring a rope guiding element with a cam and housing, where the rope guiding element is rotationally connected to the housing, allowing the cam to move along a pin guiding slot, enabling the user to manually or automatically lock the rope by rotating the housing, utilizing a spring for pretension and gravitational force to engage the cam with the rope, ensuring secure locking during falls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the fall arrester uses a simple locking mechanism, then the device complexity is reduced, but the reliability of locking during panic situations deteriorates
Solution Approach 1:
The fall arrester employs a dynamic cam mechanism that automatically transitions from a free-state (allowing rope movement) to a locked-state (preventing rope movement) based on the forces applied. The cam's rotational movement is guided by the pin in the pin guiding slot, creating a dynamic response to user actions or fall forces without requiring complex control systems.
Solution Approach 2:
The fall arrester is designed to automatically lock during falls or panic situations without requiring external intervention or complex sensing systems. The mechanical interaction between the cam, pin guiding slot, and rope creates a self-activating locking mechanism that responds inherently to the forces applied during a fall or when the user grabs the device.
2Ease of operation
If the fall arrester allows manual locking by user, then the ease of operation is improved, but the device complexity increases due to additional rotational connections
Solution Approach 1:
The fall arrester merges the manual operation function and the automatic locking function into a single integrated mechanism. The same cam and pin guiding slot structure that enables automatic locking during falls also facilitates manual locking when the user rotates the housing, eliminating the need for separate mechanisms for these two functions.
Solution Approach 2:
The cam mechanism serves multiple functions: it enables automatic locking during falls, allows manual locking when the user rotates the housing, and maintains the rope guiding function. This multi-functionality is achieved through the universal pin guiding slot that guides the cam during both automatic and manual operation modes.
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 design enhances safety by allowing the fall arrester to automatically follow the user's movements without manual intervention and securely locks onto the rope during falls or panic situations, preventing accidents.
Implementation Method 1
The fall arrester comprises a spring for pretension of the rotational movement of the cam with respect to the housing such that the cam moves towards the rope guiding element
Implementation Method 2
utilizing a spring for pretension and gravitational force to engage the cam with the rope
Data Source
AI summary
The present invention relates to a fall arrester including a rope guiding element for sliding a rope through the fall arrester, a cam for engaging with the rope being slid through the rope guiding element, and a housing, wherein the rope guiding element comprises at least one pin guiding slot for guiding a pin attached to the cam, and wherein the rope guiding element is rotationally connected to the housing, and the housing is rotationally connected to the cam, such that a rotation of the housing with respect to the rope guiding element moves the pin of the cam along the pin guiding slot of the rope guiding element.