| 摘要 |
PROBLEM TO BE SOLVED: To attain high angle of an operating angle in a uniform swivel joint. SOLUTION: A region 1b1 of undercut free is provided in a guide groove 1b of an outer side joint member 1. The region 1b1 of undercut free is provided in an interior part side of a joint from a center line O1 of the guide groove 1b, to be in parallel to an axial line of the outer side joint member 1. A region 2b1 of undercut free is provided in a guide groove 2b of an inner side joint member 2. The region 2b1 of undercut free is provided in an opening side of the joint from a center line O2 of the guide groove 2b, to be in parallel to an axial line of the inner side joint member 2.
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