Non-loosening fastening structure

Abstract

To provide a fastening structure for fastening a left-right screw intersection forming bolt (1), which has a simple structure and does not loosen. A right screw nut (2) having a recess (2a), an elastic member (3) having a rotation-preventing protrusion (3a) and a tongue portion (3b), and a left screw nut (4) having a tapered surface (4a) and a recess (4b) are included. After the bolt (1) is tightened with the right screw nut (2) and the elastic member (3) is mounted, the tongue portion (3b) of the elastic member is tightened while being pressed with the left screw nut (4), so that the tongue portion (3a) jumps up to the recess (4b) of the left screw nut, and the left screw nut is locked and fastened. As illustrated in FIG. 9, the fastening structure can also be configured by changing the right screw nut (2) to a left screw nut (2h), the elastic member (3) to an elastic member (3h), and the left screw nut (4) to a right screw nut (4h).

Dependencies are inferred from the claim text.