Inner ring press-insertion jig for a pipe joint made of resin

摘要

In the inner ring press-insertion jig for a pipe joint made of resin according to the invention, a diameter-increasing ring member 31 in which the outer diameter can be changed to the maximum outer diameter and to the minimum outer diameter by axial movement is fitted onto a front small-diameter portion 30a of a holder 30 which insertingly holds a sleeve-like inner ring 8. A fixing structure 32 which, under a state where the outer diameter of the diameter-increasing ring member 31 is changed to the maximum outer diameter, positionally fixes the diameter-increasing ring member 31 is formed between the diameter-increasing ring member 31 and the holder 30 in a manner that the fixation can be cancelled. Although pressing inserting and connecting works can be performed at a very high efficiency without requiring preheating or the like on an end portion of a pipe member made of resin, an inner ring can be easily pressingly inserted and fixed into the pipe member without damaging the tip end of the inner ring and the pipe member made of resin even when there is a production error of a small degree, and in an increased diameter state which is always uniform and appropriate.