Elevator Car Door Leaf Mounting for Emergency Rotational Opening
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Solution Overview
Problem
Elevator cars may become stuck in the shaft due to blocked sliding paths, preventing door leaves from opening sufficiently for evacuation, especially in emergencies.
Innovation Solution
A door system with movable door leaves that can slide and rotate on a sliding axis and a rotation axis, allowing the door to be partially or fully opened for evacuation even when the sliding path is blocked, using a mounting device with folding and sliding parts and a locking mechanism to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door leaf is mounted only for sliding movement, then the door system is simple and reliable for normal operation, but the door cannot be opened sufficiently when the sliding path is blocked during evacuation
Solution Approach 1:
The mounting device transitions from a static sliding-only configuration to a dynamic system that can adapt its movement mode. The door leaf is equipped with both sliding capability along the sliding axis and rotational capability about the rotation axis, allowing it to switch between normal sliding operation and emergency rotational opening based on operational conditions
Solution Approach 2:
The mounting device is designed to perform multiple functions: it enables normal sliding operation for regular door opening and closing, and simultaneously provides rotational movement capability for emergency evacuation when sliding is blocked. This multi-functionality ensures the door system can handle both routine operations and emergency situations with a single integrated mechanism
2Reliability
If a separate emergency opening is provided, then evacuation is possible, but the door system becomes more complex and requires additional components
Solution Approach 1:
The car opening serves dual purposes: it functions as the primary door opening for normal passenger access and exit, and simultaneously serves as an emergency evacuation opening when the door leaf is rotated into the emergency open position. This eliminates the need for a separate emergency opening while maintaining evacuation capability
Solution Approach 2:
The normal door opening and emergency evacuation opening are merged into a single car opening. The door leaf can be positioned in multiple states (closed, partially open, fully open, and emergency open) to serve both normal operation and emergency evacuation functions through the same physical opening
3Ease of operation
If the door leaf can be rotated into emergency open position, then evacuation is enabled without destructive force, but the mounting device becomes more complex
Solution Approach 1:
The mounting device incorporates dynamic movement capabilities that allow the door leaf to transition from sliding motion to rotational motion. This enables the door to be opened in an emergency by rotating it about the rotation axis, providing an easy evacuation method that does not require destructive force or excessive effort
Data Source
AI summary
A door system for an elevator car includes: at least one door leaf for closing a partial region of a car opening of the elevator car; and a mounting device that mounts the door leaf on the car slidably in a direction of a sliding axis between an open position, in which the door leaf releases the partial region, and a closed position, in which the door leaf closes the partial region, and additionally mounts rotatably about a rotation axis so that the door leaf, when slid into the closed position and/or into an intermediate position between the open position and the closed position, can be rotated into an emergency open position in which the car opening is released to an extent that the can be evacuated via the car opening.