| 摘要 |
<p>A simplified tightening device capable of reducing a bolt inserting force and also providing a high tightening force, comprising a base (1) in which a conical hole with slanted surface is formed, a thread block (2) through which a female screw (2b) to be threaded with a bolt (4) is passed and which is guided by the conical hole and expanded or contracted according to the axial movement of the bolt (4) inserted into the base (1), a spring (3) pressing the thread block (2) against the conical hole, and a cap (9) which is provided with a bolt inserting hole (9a), installed on the base (1), and presses the spring (3), wherein the inclination angle of the lower side slanted surfaces (21) of the threads (20) of the female thread (2b) on the thread block (2) is made larger than the inclination angle of the upper side slanted surface (22). <IMAGE></p> |
