Aerial Basket Safety Link Winding for Anti-Jamming Shutdown
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Solution Overview
Problem
Existing basket designs, particularly aerial baskets, pose a risk of operator injury due to jamming between a flexible safety link and obstacles during platform movement, and existing safety solutions can lead to jamming issues.
Innovation Solution
A basket design featuring a flexible safety link with rotary winding members and elastic return members, coupled with a detection system that switches from an inactive to an active state upon deformation, preventing platform movement to avoid jamming, while maintaining compactness and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible safety link is used to prevent operator injury, then operator safety is improved, but the risk of jamming between the link and obstacles increases
Solution Approach 1:
The patent replaces the traditional mechanical safety bar with a flexible safety link that can deform under load. This substitution allows the safety mechanism to adapt to obstacles by deforming rather than jamming, while still triggering the emergency stop function when the detection member is activated by the deformation.
Solution Approach 2:
The safety link is designed to be flexible and deformable rather than rigid. When an obstacle pushes the operator toward the control console, the link deforms dynamically to accommodate the obstacle's presence, preventing jamming while maintaining the safety function through the detection member that senses the deformation.
2Measurement precision
If the safety link travel is increased to improve detection response, then detection accuracy is improved, but the bulk of the retaining system increases proportionally
Solution Approach 1:
The patent uses a rotary winding member that converts linear travel of the safety link into angular rotation. This dimensional transformation allows the detection member to sense deformations through angular position changes rather than requiring proportional linear travel, enabling increased detection accuracy without increasing the overall bulk of the retaining system.
Solution Approach 2:
The safety link is partially wound around the rotary winding member, creating a nested configuration. This nesting allows the link to be stored compactly on the rotary member while still providing sufficient travel distance for deformation detection, effectively reducing the overall space required for the retaining system.
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 effectively prevents operator injury by stopping platform movement at the onset of deformation without increasing system bulk, ensuring rapid response and reducing the risk of jamming.
Implementation Method 1
at least one elastic return member of said rotary member configured to exert, on said rotary member, a force driving angular movement of the rotary member in the direction of winding of the link around said rotary member
Data Source
AI summary
Basket (1) comprising: a platform (7), a drive system (2) for moving the platform (7), a control desk (3) equipped with controls (4) of the system (2), a flexible safety link (5), two retaining systems (6) for keeping the link (5) in a position in which the link (5) extends across the platform (7), a detection device for detecting deformation of the link (5), having a detection member configured so that, under the effect of deformation of the link (5), it passes from a state referred to as inactive, in which operation of the controls (4) of the drive system (2) for moving the platform (7) is not disabled to a state referred to as active, in which said operation is disabled, one of the retaining systems (6) comprising a rotary member for winding the link (5) equipped with a return member for returning said rotary member in the direction of winding of the link (5) around said rotary member.