HEXAGONAL WRENCH STRUCTURE

PROBLEM TO BE SOLVED: To provide a hexagonal wrench which effectively prevents scratch circularization in the inside hexagonal hole of a bolt.SOLUTION: A hexagonal wrench structure shows that a tool rod body is provided with at least one work end to keep each cross section of the work end hexagonal with the first cross section located close to the end part of the work end, and the second cross section located close to the base part of the work end. Since the diameter of an inscription circle of the first cross section is smaller than the diameter of an inscription circle of the second cross section, the work end is conical with the first cross section and the second cross section displaced by the first angle θ1, so that six fitting curves extending while enlarging towards the base part under twisting are formed by connecting the tips of six corners in the first cross section with the tips of six corners in the second cross section.SELECTED DRAWING: Figure 7 【課題】ボルトの内側六角穴における擦過円状化が効果的に防止される六角レンチ【解決手段】工具ロッド本体に少なくとも１の作業端が設けられ、当該作業端の各横断面が六角形状をなしており、第１横断面が作業端の端部付近に位置し、第２横断面が作業端の基部付近に位置する六角レンチの構造であって、当該第１横断面の内接円の直径は当該第２横断面の内接円の直径よりも小さいことから、当該作業端は錐状体をなしており、当該第１横断面と当該第２横断面は第１角度θ１のずれをなしていることから、当該第１横断面における６つの角の先端と当該第２横断面における６つの角の先端を接続することで、捻じれつつ基部に向かって拡大しながら延伸する６本の嵌止曲線が形成されている。【選択図】図７