| 摘要 |
PROBLEM TO BE SOLVED: To attach plural ceramic boards 8 and 10 with dovetail tenons to dovetail grooves formed in metal boards speedily and efficiently and to attach the ceramic boards to a blower easily to reduce the total working hours and the cost. SOLUTION: Metal boards 1 and 2 are processed so as to have the necessary dimension and shape, and dovetail grooves 3 are formed in the metal boards. A necessary number of bolt holes are formed on the bottom of each dovetail groove, and the leg part of a flat head bolt 5 is inserted into each bolt hole. Then the head of the bolt is attached to the bottom of the dovetail groove by the welding. Dovetail tenon parts 9 of the plural ceramic boards 8 and 10 with dovetail tenons are inserted into the dovetail grooves of the metal boards 1 and 2, and stopper metals 7 are attached to both ends of each dovetail groove by the welding, then the ceramic boards with dovetail tenons are fixed. After that, the leg parts of the flat heat bolts attached to the metal board 1 whose surface is covered by the ceramic board with dovetail tenons are inserted into bolt holes formed at prescribed positions of the blower, and tightened by nuts 6 from the rear side of an attached member.
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