| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing an inexpensive joint fitting for a segment, which has high tensile performance while facilitating assembly by a simple configuration, and the joint fitting for the segment.SOLUTION: A joint fitting for a segment includes a female fitting that is made of a cylindrical body, and a male fitting that comprises a shank having a diameter-enlarged head formed at a tip. The female fitting of the joint fitting for the segment is gradually diameter-reduced by working for providing a taper toward a tip part from an intermediate part, and the tip part is formed with an inside diameter smaller than the size of the head of the male fitting. Subsequently, after the application of heat treatment processing, a plurality of slits directed toward the intermediate part from the tip part are formed.SELECTED DRAWING: Figure 2 |
