Piping joint device and manufacturing method thereof

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 to extend 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 to be made 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 to be engaged with the engagement portions of the piping joint member, wherein:
• the male joint of the first piping member is inserted into the female joint of the second piping member in one touch by using deformation of the engagement portions;
• the piping joint member and the first piping member are provided with a detent portion at a fixing portion of the piping joint portion fixed to the first piping member;
• and
• the detent portion is provided to prevent a rotation of the first piping member and the second piping member which are connected to each other.

A method for manufacturing a piping joint device, comprising:

• forming a first piping member having a male joint;
• forming a second piping member having a female joint;
• mounting a piping joint member having a plurality of diametrically deformable engagement portions to an outer periphery of the second piping member such that the engagement portions are inserted into window portions provided in an extending cylinder portion at an end of the second piping member;
• and
• inserting the male joint of the first piping member into the female joint of the second piping member,
• wherein the step of forming the first piping member includes:
• arranging an engaged member having an approximately cylindrical shape on an outer surface of the first piping member;
• and expanding the first piping member while fastening the engaged member inwardly so as to fixing the engaged member onto the first piping member;
• and
• wherein the piping joint member and the first piping member form a detent portion at an engagement position where the engagement portions engage with the engaged member on the first piping member after the inserting.