Separation prevention device for pipe joint

A separation prevention method for a pipe joint, that connects a first pipe having a receiving opening and a second pipe having a inserting opening, comprising:

• inserting the inserting opening of the second pipe into the receiving opening of the first pipe, said first pipe comprising a plurality of disengagement prevention members disposed at a plurality of locations in a circumferential direction, such that claws formed on the disengagement prevention member face an outer peripheral surface of the inserting opening, and a claw of at least one the disengagement prevention members and a claw of an adjacent disengagement prevention member, which is adjacent in the circumferential direction of the pipe, are arranged so as to overlap each other when viewed in an axial direction of the pipe in a state where the claws are engaged with the outer peripheral surface of the inserting opening;
• and
• pressing the disengagement prevention members radially inward of the pipe joint.

A plurality of disengagement prevention members which are disposed at a plurality of locations in a circumferential direction of a pipe, each disengagement prevention member comprising a claw capable of biting into an outer peripheral surface of the pipe, wherein the claw of at least one of the disengagement prevention members and a claw of an adjacent disengagement prevention member, which is adjacent in the circumferential direction of the pipe, are arranged so as to overlap each other to form an overlapped portion when viewed in an axial direction of the pipe in a state where the claws are engaged with the outer peripheral surface of the pipe.