| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a steel pipe curvature quantity measuring apparatus capable of easily and highly accurately measuring a curvature quantity of a steel pipe. <P>SOLUTION: A steel pipe curvature quantity measuring apparatus 2 includes a fixed side holding body 21 holding a laser beam irradiation device 20 and fixedly arranged on the surface of a steel pipe 10 and a mobile side holding body 23 which while holding a scale member 22 with a scale M, is moved on the surface of the steel pipe 10 in an axial direction and arranged on a predetermined measurement position. The fixed side holding body 21 and the mobile side holding body 23 are configured such shapes that when abutting on the outer peripheral surface of the steel pipe 10, directions of the abutting positions of the steep pile 10 in the axial direction are turned to one specific direction. In abutted states of the fixed side holding body 21 and the mobile side holding body 23 on the outer peripheral surface of the steel pipe 10, the fixed side holding part 21 and the mobile side holding part 23 respectively hold the laser light irradiation device 20 and the scale member 22 so that the direction of an optical axis A of the laser light irradiation device 20 and a direction faced by the scale M of the scale member 22 are respectively parallel with the axial directions of the abutted positions of the steel pipe 10. <P>COPYRIGHT: (C)2013,JPO&INPIT |
