| 摘要 |
PURPOSE: An insert bolt with a rotation preventing function is provided to disperse power focused on an inclined surface by forming one-sided sawteeth in the bolt rod and to apply torque in a direction of fastening the bolt rod using power focused on a vertical surface, thereby preventing the bolt rod from being rotated when placing concrete. CONSTITUTION: An insert bolt with a rotation preventing function comprises a bolt rod(100), a spring(200), a sliding member(300), a support rib member(400), and a connection rod. The bolt rod is composed of a disc-shaped head unit and a cylindrical center rod(120). One-side sawteeth are formed in the disc-shaped head unit. A screw thread is formed in the lower part of the center rod. The one-sided sawteeth is composed of an inclined surface(111a) and a vertical surface(111b). The bolt rod has torque in the direction of being fastened to the connection rod by increased pressure of concrete through a vertical plane(111b) when external pressure is applied. |
