Elevator Car Skirt Pivot Mechanism for Shaft Gap Safety
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Solution Overview
Problem
Elevator installations with shallow pit depths face challenges in achieving high stability for car skirts to prevent people from falling during evacuations, as existing designs require significant effort and resources to meet stringent stability requirements.
Innovation Solution
A movable car skirt that can be supported on shaft doors when in a vertical blocking position, providing stability and preventing undesired yielding, thus eliminating the need for elaborate structural measures or additional locking means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid car skirts are used to meet stability requirements, then stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The car skirt is designed as a movable element that can pivot between a horizontal rest position and a vertical blocking position. This dynamic design allows the skirt to adapt to different operational states: remaining horizontal during normal operation to avoid interference, and automatically rotating vertical during emergencies to provide protection, thereby achieving high stability without complex rigid structural measures
Solution Approach 2:
The car skirt utilizes its own weight and gravity to automatically rotate from the horizontal rest position to the vertical blocking position during emergencies. The design eliminates the need for additional locking means or complex structural supports by allowing the skirt to self-activate and maintain its protective position through gravitational force alone
2Stability of the object's composition
If elaborate structural measures are provided to ensure stability, then stability is improved, but manufacturing cost increases
Solution Approach 1:
The movable pivotable design replaces expensive rigid structural measures with a simple rotational mechanism that uses the skirt's own weight for stabilization, significantly reducing manufacturing costs while maintaining high stability during emergency blocking operations
Solution Approach 2:
The car skirt's self-activating mechanism using gravity eliminates the need for costly additional locking means and complex support structures, achieving both stability and cost-effectiveness by allowing the skirt to automatically assume and maintain its protective position
3Reliability
If additional locking means are provided to secure blocking position, then reliability is improved, but device complexity increases
Solution Approach 1:
The car skirt automatically maintains its vertical blocking position through its own weight and gravitational force, eliminating the need for additional locking means. The skirt's design allows it to self-secure in the blocking position, achieving high reliability without increasing device complexity
Solution Approach 2:
The car skirt's own weight acts as a counterweight that automatically secures the vertical blocking position. The gravitational force on the vertical skirt prevents it from returning to the horizontal position, providing inherent security without requiring additional locking mechanisms
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
Ensures safe evacuation by maintaining high stability and meeting strict standard requirements without the need for costly structural modifications, allowing the car skirt to automatically transition into a blocking position under gravity, preventing falls into the elevator shaft.
Implementation Method 1
allowing the car skirt to automatically transition into a blocking position under gravity
Data Source
AI summary
An elevator installation includes an elevator shaft provided with shaft doors and a car moveable up and down in the shaft. The car has a car skirt moveable between a horizontal rest position and a vertical blocking position. The car skirt is pivotally and displaceably mounted on the car by a guideway. When the car skirt is in the blocking position, it can be supported on an adjacent one of the shaft doors.