Temperature-Activated Spring Hinge for Fire Door Closure
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Solution Overview
Problem
Existing self-closing mechanisms for fire doors lack reliable activation methods for environmental changes such as heat and fire, which can lead to delayed or incomplete closure in emergency situations.
Innovation Solution
A temperature-activated spring hinge system featuring a fusible pin and biasing element, where a fuse positioned within the hinge reacts to elevated temperatures, breaking to unlock a locking pin and allow the hinge to move from an open to a closed position, ensuring the door closes automatically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a self-closing mechanism is added to fire doors, then door closure reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the self-closing mechanism directly into the hinge assembly, merging the hinge function with the automatic closing function. The spring element and locking pin are integrated within the hinge structure, eliminating the need for separate actuators or complex control systems while ensuring reliable door closure during fires.
Solution Approach 2:
The hinge system automatically activates through temperature-activated release of the locking pin, which allows the spring to automatically close the door without external control. The system serves itself by using the fire condition (heat) to trigger the closing action, eliminating the need for external power sources or control systems.
2Reliability
If a temperature-activated fuse mechanism is implemented, then automatic activation in fire conditions is improved, but manufacturing complexity increases
Solution Approach 1:
The locking pin is designed as a disposable, temperature-sensitive component that melts or deforms at a specific temperature threshold. This simple, low-cost element provides reliable automatic activation without requiring complex sensors or actuators, making the hinge easy to manufacture while ensuring dependable fire response.
Solution Approach 2:
The system utilizes changes in physical parameters (temperature-induced melting or deformation of the locking pin) to trigger the closing action. By selecting materials with specific melting points, the activation temperature can be precisely controlled without complex electronics, simplifying manufacturing while ensuring reliable automatic activation in fire conditions.
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 system ensures reliable and automatic closure of fire doors in response to elevated temperatures, enhancing safety by guaranteeing the door is secured in emergency conditions, such as a fire.
Implementation Method 1
a fuse which is configured to react in response to an elevated temperature
Implementation Method 2
a biasing element configured to bias the hinge in a closed position. In at least one embodiment the biasing element is a spring
Data Source
AI summary
There is a temperature activated spring hinge comprising hinge section comprising at least one door leaf and at least one hinge leaf. There is also a fuse which is configured to react in response to an elevated temperature. The fuse can be positioned inside one of the knuckles of the door leaf. There is also a biasing element configured to bias the hinge in a closed position. In at least one embodiment the biasing element is a spring. There is also at least one guide configured to guide a movement of the hinge when the hinge moves from an open position to a closed position.