| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to adjust the effective length of a connection bolt, which connects a transformer body and the lid of a tank, outside the tank without decreasing fixing strength for the transformer body within the tank.SOLUTION: A connection bolt 31 connecting a transformer body 20 and the lid 12 of a tank 10 are spirally engaged with a seat-plate-having nut 35, with its seat plate part 35b facing down. The nut body 35a of the seat-plate-having nut is loosely passed through a through-hole 12a provided in the lid, and guided out upward from the lid. The nut body 35a is operated from outside the tank 10, and the position of the nut 35 in the direction of height is adjusted, thereby adjusting the effective length of the connection bolt. A bag nut 37 is spirally engaged with the projection of the connection bolt 31, projecting upward from the upper end of the seat-plate-having nut, and the seat-plate-having nut 35 is accommodated in the bag nut. The bag nut 37 is tightened against the lid 12 of the tank 10 via a packing 38, thereby sealing the bag nut 37 from inside and outside. |
