| 摘要 |
Disclosed is a method of joining piping materials which comprises, forming at an end portion of one piping material to be joined a socket composed of a tapered portion which is diametrally enlarged gradually toward the pipe end and a maximum diameter portion extending from the tapered portion with the maximum diameter thereof, then fitting an intermediary inserting member along the internal peripheral surface of the tapered portion in the socket to be in intimate contact therewith and thereafter inserting an end portion of the other piping material thereto, further pressurizing the external peripheral of the socket with two clamping members having a lateral cross-sectional shape with the center position as the deepest portion and tapered planes of clamping action on both sides thereof in the radial direction, thereby effecting plastic deformation of the maximum diameter portion in the diameter shrinking direction. Also disclosed is a joining tool, provided with: two clamping members each having a lateral cross-sectional shape with its center position as the deepest portion, and each having tapered planes of clamping action on both sides thereof at the tip end side and an actuating lever at the base end; a connecting plate supporting the both clamping members with the tapered planes of clamping action opposed to each other freely expandably and shrinkably with rotational axes; and a pushing rod to be pressurized into between the actuating levers of the both clamping members. |
