JPS6272656U

JPS6272656U -

Info

Publication number: JPS6272656U
Application number: JP16424685U
Authority: JP
Priority date: 1985-10-28
Filing date: 1985-10-28
Publication date: 1987-05-09

Description

[Brief explanation of the drawing]

図は本考案の実施例を示すもので、第１図は防
火ダンパーが開いたところを示す側断面図、第２
図は防火ダンパーが閉じたところを示す側断面図
である。１はウエザーカバー、２はストツパー、３は防
火ダンパー、４はスプリングのアームが閉じた状
態の形状記憶合金、５は下部開口部、６は換気孔
、７はスプリングのアームが記憶させた開いた形
状の形状記憶合金。 The figures show an embodiment of the present invention, in which Figure 1 is a side sectional view showing the fire damper opened;
The figure is a side sectional view showing the fire damper closed. 1 is a weather cover, 2 is a stopper, 3 is a fire damper, 4 is a shape memory alloy with a spring arm in a closed state, 5 is a lower opening, 6 is a ventilation hole, and 7 is an open state where the spring arm is memorized. Shape memory alloy.

Claims

[Scope of utility model registration request]

Inside the weather cover 1, a spring made of a shape memory alloy is normally placed in a closed arm shape 4,
By fixing one of the spring arms to the weather cover 1 and the other to the fire damper 3, the fire damper 3 is opened, and the spring arm stored at high temperatures is opened due to the temperature rise when a fire occurs. Due to the characteristic of returning to the shape 7, the fire damper 3 is fixed to one side of the arm of the spring and movably fixed at one end, and the stopper 2
A fire prevention damper made of a shape memory alloy for weather covers, which moves until it stops at a position to close a lower opening 5 of a weather cover 1.