| 摘要 |
PROBLEM TO BE SOLVED: To reduce the possibility of wear and deformation of members in a bolt body rotation control means, in a shroud head joint mechanism, and to improve the rotational angle control function of a bolt body and the loosening prevention function. SOLUTION: A bolt body rotation control means 20 is used for controlling the rotation of the bolt body by a cylindrical member 101 projecting downward, from the lower edge of the sleeve of a shroud head bolt; and a pin 102 that is provided at the lower edge of the bolt body 9 and can move in a window-hole-like opening 103 formed inside the cylindrical member. In this case, the thickness of the cylindrical member is made larger, at a region that abuts against at least the pin, as compared to those of other parts. COPYRIGHT: (C)2007,JPO&INPIT
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