| 摘要 |
PURPOSE: To obtain the subject bearing sphere free from the breakage and the abortion of connection between the bearing sphere and the cylindrical pipe based on the bending of a device bolt by disposing a specific forming part in the intermediate length section of the cylindrical tube projecting to both tips from the bearing sphere. CONSTITUTION: The upper bearing sphere 10 of an upper tool bolt and the lower bearing sphere of a lower tool bolt are engaged with a chip part and fixed with bolts. The cylindrical pipe 14 is projected out to both tips from the bearing sphere 12, the forming part 15 is disposed in the pipe 14 and the outer surface of the forming part is abutted to the inner surface of the forming part with play. The pipe 14 supports the bearing sphere through the part 15 and supporting sections 20a and 20b supported by bolts are formed by the forming part. |
