| 摘要 |
PURPOSE:To improve reliability at the time of earthquake without losing vibration isolating property by a method wherein bases are supported so that the regulation in the vertical direction may be received to an earthquake-proof bolt. CONSTITUTION:Bases 12 are provided at the most lower section of a transformer 11 and square rubber vibration isolator 13 are positioned between the bases 12 and floor. An earthquake-proof bolt 15 is buried in the floor at the lower part at the tip sections of the bases 12. The earthquake-proof bolt 15 is fastened to supporting metal fittings 16 provided on the floor. The supporting metal fittings 16 are formed in ? shape opened the upper part and bolts 18 are provided at the center of the ? shape. Cylindrical rubber vibration isolator 19 are positioned around the bolts 18, namely, between hole parts 14 and the bolts 18. Therefore, this method prevents the transformer from declination with high displacement even if high overturning moment acts to the transformer. Therefore, reliability at the time of earthquake can be improved without losing vibration isolating property. |
