| 摘要 |
PROBLEM TO BE SOLVED: To provide a flue gas window capable of preventing leakage of gas and oil of a gas spring in a fire.SOLUTION: A flue gas window comprises a rectangular frame-shaped window frame 3, a rectangular plate-like sash 5 openably-closably provided in the window frame 3 and a gas spring 7 for holding one end part by the window frame 3 and holding the other end part by the sash 5. The gas spring 7 comprises a gas spring body 55 having a rod 53 projecting from a tip part of a cylindrical tube 51 so as to be capable of advancing-retreating and a cover 61 provided in an outer peripheral part of the gas spring body 55. A cylindrical rod guide 63 is provided in a tip part of the tube 51, and the rod 53 is provided in the tube 51 via the rod guide 63 so as to be capable of advancing-retreating. The cover 61 is formed of a heat insulation material, and is provided in a cylindrical shape by being wound on an outer peripheral part of the tube 51. The cover 61 is extendedly provided to the tip side from the tip part of the tube 51, and the rod guide 63 is covered with the cover 61.SELECTED DRAWING: Figure 3 |
