| 摘要 |
The present invention relates to a spanner used to fasten and release a bolt and a nut, and more specifically, relates to a spanner allowing a clamp to be operated upward and downward through the rotation of a lever in order to hold, release, and fasten the bolt and the nut together with a supporter, thereby achieving a superior force to hold the bolt and the nut and also preventing damage and deformation, and allowing the clamp and the supporter to hold the bolt and the nut through an operation of a stopper, thereby conveniently performing work and securing superior workability. According to an embodiment of the present invention, the spanner comprises: a body having a grip formed on one side thereof and the supporter formed on a head part opposite to the grip; the clamp is installed on a guide groove of the body in such a manner that the clamp can move upward and downward and engaged corresponding to the supporter; the lever is rotatably installed on the body and has an inner gear and a sector-gear formed on a gear wheel; a planet gear is rotatably installed on the body and engaged with a rack gear of the clamp and the inner gear of the lever to drive the clamp upward and downward; the stopper is rotatably installed on the body and controlling an operation of the lever; and a cover is coupled to one surface of the body and covers the clamp, the lever, the planet gear, and the stopper. |
