Two-point distance gauge, two-point distance gauge system, and distortion measuring method using two-point distance gauge system

摘要

A rod-shaped main body 11 configured to be freely extendable and retractable to an arbitrary length by fitting a plurality of cylindrical rods 111, 112, 113 having different diameters; a body 11 that is freely bendable at a desired angle with respect to the main body 11, A distal end spherical shaft 12 which is provided at one end 113a of the main body 11 and has a spherical tip 12a whose diameter is larger than the diameter of the shaft 12a and which can be bent at a desired angle with respect to the main body 11 And a conical tip-shaped pointed shaft 13 which is provided at the other end 113 a of the main body 11 so as to be able to hold the angle and whose tip 13 a has a conical shape.