Patent ID: 7611171

Claim:
A piping joint device comprising: a first piping member having a male joint; a second piping member having a female joint; a piping joint member including: a body portion with an approximately cylindrical shape having a plurality of slot portions which are positioned at equal intervals from an axis and extend axially from an end surface of the body portion; and a plurality of diametrically deformable engagement portions provided on a circumference of the body portion extending toward the axis, at positions where the slot portions are not provided; an extension cylinder portion formed on an end of the second piping member integral with the female joint, and extending toward the first piping member; and a plurality of window portions provided in the extension cylinder portion along a circumferential direction of the extension cylinder portion engaged with the engagement portions, wherein: the engagement portions deform when the male joint of the first piping member is inserted into the female joint of the second piping member; the piping joint member and the first piping member are each provided with a detent portion at an engagement position where the engagement portions engage with the first piping member; an engaged portion provided on an outer periphery of a root portion of the male joint of the first piping member engages with the engagement portions, wherein: the detent portions are constructed with a first step portion provided on the engagement portions, and a second step portion provided on the engaged portion and opposite to the first step portion engages with the first step portion; the first step portion is fitted with the second step portion to prevent a rotation of the first piping member and the second piping member; and the first piping member and the second piping member are connected to each other.