Fall Arrest Line Receptacle With Gravity-Blocking Orientation Control
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Solution Overview
Problem
Existing fall arrest devices require precise orientation to prevent incorrect insertion of the line, which can lead to malfunction during a fall.
Innovation Solution
A fall arrest device with a movable obstruction member that blocks the line receptacle if the device is incorrectly oriented, preventing incorrect line insertion and ensuring proper function during a fall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed blocking element is used to prevent incorrect insertion, then insertion safety is improved, but the device cannot be used in multiple orientations
Solution Approach 1:
The blocking element is made movable rather than fixed, allowing it to dynamically change position based on gravitational force. When the device is oriented correctly, gravity keeps the blocking element retracted; when oriented incorrectly, gravity causes it to extend and block the receptacle, preventing incorrect insertion while allowing correct use
2Reliability
If the obstruction member has a large volume to effectively block the receptacle, then blocking effectiveness is improved, but the device size increases
Solution Approach 1:
The blocking element utilizes the gravitational field dimension to achieve blocking effectiveness. Instead of relying solely on volume, the element's position is controlled by gravity-induced movement, allowing a compact element to effectively block the receptacle when needed without increasing overall device volume
3Reliability
If the recess geometry is made more pronounced to securely engage the line, then engagement reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The recess is provided only on the obstruction surface of the blocking element, not throughout the entire component. This localized feature provides secure line engagement precisely where needed (when the element blocks the receptacle) while minimizing manufacturing complexity elsewhere in the component
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 device enhances safety by preventing incorrect orientation and ensuring the line is correctly received, thereby maintaining the device's functionality during a fall.
Implementation Method 1
an obstruction member (30) configured for moving relative to the line receptacle (10) based on the influence of gravity between an obstruction position obstructing the line receptacle (10) and an open position
Data Source
AI summary
A fall arrest device for attachment to a line includes a body with a line receptacle defining a first direction by its extension and for receiving the line with the first direction oriented in parallel to the line; an obstruction member configured for moving relative to the line receptacle based on the influence of gravity between an obstruction position obstructing the line receptacle and an open position as a function of the first direction oriented against the gravity or following the gravity; and an arrest mechanism with a coupling member for coupling to a user and with an arrest member for arresting the line in the line receptacle in case of a fall of the user along the line; wherein the obstruction member has a recess configured for engaging with the line in the obstruction position.