| 摘要 |
<p>In order to carrry out a two-stage fire extinguishing operation including a cooling fire extinguishing operation and an oxygen deficiency fire extinguishing operation using a fire extinguishing gas, a cylinder filled with a liquefied gas of carbon dioxide is used, and a firing pin unit for breaking a seal member of the chlinder, a retainer for maintaining the firing pin unit in a non-opereted state and a retainer operating device for automatically operating the retainer on the basis of stored temperature data are provided. The retainer is fixed at a head portion thereof by bolt screwed to the upper surface region of a fixing member, and leg portions of the retainer are fitted in an upper recess in a shaft to a lower end portion of which a pin is fixed. The retainer operating device consists of a retainer turning member provided with projections on one end portion thereof. These projections are positioned on the inner side of the two leg portions of the retainer, and the retainer operating device is turned when a spring of a shape memory metal contracts at a predetermined temperature, to cause the projections to open the leg portions of the retainer, and the pin to be driven. <IMAGE></p> |
