Elevator Hall Door Fire Containment via Melted Film Receiving Member
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Solution Overview
Problem
Existing elevator hall door designs with laminated glass fail to prevent fire spread when the melted adhesion sheet drips into the hoistway, potentially igniting and spreading fire to other floors.
Innovation Solution
The design incorporates a combustible member between hall-side and hoistway-side panels with a receiving member to catch and contain the melted intermediate film, preventing it from igniting and spreading fire through the hoistway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a laminated glass with adhesion sheet is used for fire resistance, then fire-resistant performance is improved, but fire safety deteriorates when the adhesion sheet melts and drips into the hoistway causing ignition
Solution Approach 1:
The patent extracts the harmful melted adhesion sheet from the potential fire spread path by introducing a receiving member that catches and contains the melted material below the window hole, preventing it from dripping into the hoistway and igniting combustible materials
Solution Approach 2:
The receiving member acts as an intermediary between the melted adhesion sheet and the hoistway environment, intercepting the melted material and preventing direct contact with combustible materials in the hoistway space
2Strength
If the adhesion sheet is positioned between glass panels, then structural integrity is improved, but fire safety deteriorates due to potential melting and dripping into the hoistway
Solution Approach 1:
The patent extracts the harmful effect of melted adhesion sheet dripping by introducing a receiving member that captures the melted material below the window hole, preventing it from reaching the hoistway while maintaining the adhesion sheet's structural position between glass panels
Solution Approach 2:
The receiving member extends in the width direction (orthogonal to thickness direction) and forms a U-shaped or N-shaped barrier in the vertical cross-section, creating a three-dimensional containment structure that intercepts melted material falling from the adhesion sheet
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
Effectively prevents fire from spreading to other floors by receiving and containing the melted intermediate film, thereby reducing the risk of ignition and ensuring fire containment within the elevator hall.
Implementation Method 1
the melted adhesion sheet may drip to the hoistway together with the hardened glass and may ignite
Data Source
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AI summary
It is an object to provide an elevator hall door which can prevent that the fire spreads to other floors through a hoistway when fire occurs at a hall side. The elevator hall door (a left door 101) includes a hall-side panel 131 which constitutes a surface of the hall side of the elevator, a hoistway-side panel A 136 which constitutes a surface of the hoistway side of the elevator at a position being separated from the hall-side panel 131, and a window glass 110 which is held between the hall-side panel 131 and the hoistway-side panel A 136. The window glass 110 includes a hall-side glass 111, an intermediate film 112 and hoistway-side glass 113. Then, the elevator hall door (the left door 101) is provided with a receiving metal fitting A 121 below the window glass 110 for receiving a falling object of the melted intermediate film 112.