| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and a device for fastening and loosening a rail for mechanical construction, having a proper shape adapting to mechanical construction.SOLUTION: In the method for fastening and loosening a rail for mechanical construction, a bottom 2 of a fastening bolt 1 is provided with a projection part 3 projecting to a rail 10 side, the projection part 3 is brought into contact with a bottom side face 10A of the rail 10, and a shift amount of the fastening bolt 1 in preset is set, in order for fastening and loosening the rail for mechanical construction. |
