| 摘要 |
PROBLEM TO BE SOLVED: To provide a flapper installation structure capable of improving strength of a flapper. SOLUTION: In the flapper installation structure for installing the flapper 3 to a segment 4, a first shaft part 321 and a second shaft part 331 are formed by bending branched two support parts of the flapper 3 into cylindrical shapes, the first shaft part 321 is supported by a first support part 411 and a second support part 412 formed in both side edge parts of a first opening 41 in the segment 4, and the second shaft part 331 is supported by a third support part 421 formed in the side edge part of a second opening 42 formed in parallel to the first opening part 41. COPYRIGHT: (C)2006,JPO&NCIPI
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