| 摘要 |
PURPOSE:To enable the originally stretched tension to be maintained after heat cycle, by choosing a small-gage wire whose coefficient of thermal expansion is larger than that of a standard frame body, absorbing the elongated amount caused by the thermal expansion in case of temperature rise, and giving said wire the function maintaining the condition wherein the tension is being applied to said wire. CONSTITUTION:A standard frame body 1 made of ceramics or the like and a supporting frame 7 are fixed on a base plate 6, and in this case fixing metal fittings 2 for the small-gage wire are previously set on the small-gage wire-fixing parts of the standard frame body 1. Next, the ends of small-gage wires 3 whose coefficient of thermal expansion is larger than that of said frame body 1, for instance, such as SUS304 or the like are spot-welded and fixed to the small-gage wire-fixing metal fittings 2. In addition, the other ends of the small-gage wires 3 are fixed to the end parts of springs 4, and the tension of each smallgage wire is adjusted so as to be, for instance, about 250gr by means of an adjustable nut 8. After that, sealing crystalline glass frit or the like which is cementing material is applied on the small-gage wire 3 in order to fix the small-gage wire 3 to the frame body 1. Further, the glass frit is solidified in the burning furnace, and the small-gage wire 3 is fixed to the standard frame body 1. |
