| 摘要 |
A structure for preventing slipping-off of a tube in a pipe joint made of resin in which a union nut (2) is fastened to a joint body (1) to cause a pressing edge portion (19a) of the union nut (2) to abut against a diameter-increased root portion (17) of a tube (3), thereby pressing one end of the tube (3) toward the joint body (1), a recess (20) is previously shaped in the diameter-increased root portion (17) of the tub (3), the recess being smaller in radius of curvature or angle than the diameter-increased root portion, and the pressing edge portion (19a) of the union nut (2) is then caused to abut against the recess (20).
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