| 摘要 |
PURPOSE:To enable a U-bolt to be prevented from generating its looseness, by increasing a limit of elasticity in a curved part, which causes the looseness of the U-bolt, and substantially eliminating plastic deformation. CONSTITUTION:A U-bolt, providing screw threaded parts 25 in point end sides of leg parts 21 while screwing nuts 5 to the screw threaded parts 25, forms a curved part 22 in an external diameter larger than the external diameter of the leg parts 21. In this way, the U-bolt, forming the curved part 22 in a thicker size so as to enhance bending rigidity, increases a spring constant of the curved part 22. That is, a distortion decreases even if a load P is applied by tightening. Accordingly, the U-bolt 20, generating no plastic deformation for the predetermined load P, comes to be effectively prevented from generation of the looseness. |
