HOT PLATE

PROBLEM TO BE SOLVED: To facilitate assembly work, and to improve production efficiency. SOLUTION: The hot plate is composed such that when a hexagonal ring spring 18 is expanded, fit on an outer circumference of an opening cylindrical part 20 of a boil over ring 16, and pushed in to a position of a slit hole 21, the ring spring 18 contracts inward and fits in the slit hole 21 since a radius of an inscribed circle of the ring spring 18 is smaller than a radius of the opening cylindrical part 20. A radius of a circumscribed circle of the ring spring 18 is provided larger than a radius of a burner opening 8 so that each corner part of the ring spring 18 abuts on a rear face side of a top plate 6 to serve as loosening prevention from the burner opening 8 of the boil over ring 16. By this, the boil over ring 16, a seal packing 17, and the top plate 6 can be integrally fixed just by fitting the ring spring 18 on the outer circumference of the opening cylindrical part 20, and the assembly work can be facilitated. COPYRIGHT: (C)2005,JPO&NCIPI