Patent ID: 7581922

Claim:
A turbine casing structure having an outer casing, and an inner casing disposed in the outer casing, comprising: a bush disposed in a concave portion formed in the inner casing and in such a shape as to contact an upper part and a lower part of the concave portion, but not to contact side parts of the concave portion; an eccentric shaft inserted into a communication hole formed in the outer casing, and having a front end disposed in contact with the bush; and a fixing member disposed in engagement with the eccentric shaft, and fixed to the outer casing, wherein a left-right movement of a front end of the shaft is cancelled by the bush, and up-down movement of the front end of the shaft acts on the inner casing via the bush so that the position of the shaft in the up-down direction of the inner casing with respect to the outer casing is adjustable from outside the turbine casing structure.