Elevator Car Evacuation Ladder with Movable Flap and Telescopic Design
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Solution Overview
Problem
Traditional measures for evacuating an elevator car, such as ladders, are difficult to handle and not easily accessible for passengers, especially in emergency situations where the elevator car cannot be moved to a floor or its doors opened.
Innovation Solution
An elevator car design featuring a movable flap at a side wall, allowing a telescopic or extendable ladder to be stored and easily accessed behind the flap, which can be extended for evacuation, with a locking mechanism to prevent unauthorized use and a separate tool for opening, and an exit hatch in the ceiling for additional evacuation options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ladder is stored in the elevator car for evacuation purposes, then evacuation capability is provided, but the ladder is difficult to handle and not easily accessible for passengers
Solution Approach 1:
The ladder is divided into multiple telescopic sections that can be independently moved relative to each other. This segmentation allows the ladder to be compactly stored in the storage compartment and easily extended to the required length during evacuation, reducing handling complexity while maintaining accessibility
Solution Approach 2:
The ladder transitions from a static stored position to a dynamic extended position through telescopic movement. The ladder can be dynamically adjusted in length by moving the rungs relative to the side walls, allowing it to adapt to different evacuation scenarios while remaining compact during storage
2Length of moving object
If a telescopic ladder is provided for evacuation, then the ladder can be extended to reach higher points, but the ladder becomes more complex to store and retrieve
Solution Approach 1:
The telescopic ladder sections are nested within each other in a compact configuration during storage. The rungs are arranged in overlapping positions that allow them to fit within a small volume in the storage compartment, while enabling full extension when needed for evacuation
Solution Approach 2:
The ladder storage solution utilizes the vertical dimension by positioning the storage compartment in the ceiling area. The ladder extends vertically from the ceiling storage location, utilizing the elevator car's height dimension for both storage and deployment, thereby saving horizontal space
3Volume of stationary object
If the ladder is stored in a compact space to save room, then storage efficiency is improved, but access to the ladder becomes more difficult
Solution Approach 1:
The ladder is extracted from the ceiling storage compartment through an opening mechanism that allows the ladder to be pulled out and extended downward. This extraction process provides easy access to the ladder while maintaining compact storage, as the ladder can be quickly removed from the ceiling compartment when needed
Solution Approach 2:
The ladder is pre-positioned in the ceiling storage compartment in a ready-to-deploy configuration. The storage compartment is designed with quick-access features that allow the ladder to be rapidly retrieved and extended, eliminating the need for complex assembly or search operations during emergency evacuation
Data Source
AI summary
An elevator car with special measures for evacuation has several side walls, a floor and a ceiling, which together enclose an interior of the elevator car. The elevator car has a flap arranged on one of the side walls and a ladder for evacuating persons from the interior of the elevator car. The flap is movable between a closed state, in which the flap blocks access from the interior of the elevator car to an area behind the flap, and an open state, in which access is possible from the interior of the elevator car to the area behind the flap. The flap has a height less than the height of the side walls. In the closed state of the flap, the ladder is arranged in the area behind the flap. The ladder is removable from behind the flap and can be increased in length for the evacuation.