| 摘要 |
PURPOSE:To facilitate disassembly and assembly work in a center valve used for a manufacturing device of a tube for a fluorescent lamp or the like, by mounting a fixed center valve to a supporting base through a hinge further arranging to detachably butt the fixed center valve to a rotary side center valve. CONSTITUTION:A fixed center valve 5a of an exhaust center valve 5 is mounted to a supporting base 12 through a hinge 13. This hinge 13 is constituted by connecting the root end of a hinge arm 14 to the base 12 through a hinge shaft 15, and said valve 5a is mounted to the point end of said arm 14. Accordingly, this valve 5a can be turned about the shaft 15 of the hinge 13 as the center and detachably butted to a rotary side center valve 5b. Further a roller 17 is mounted to said valve 5a through a roller arm 16, and this roller 17 is rolled on a horizontal guide path 18. |
