Metal working – Means to assemble or disassemble – Coupling to conduit
Patent
1989-08-15
1990-09-18
Watson, Robert C.
Metal working
Means to assemble or disassemble
Coupling to conduit
F16L 3500
Patent
active
049569040
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a device for joining piping materials comprising a pair of processing dies which are movable in a direction parallel to the axis of the piping materials, by which the two piping materials, such as a piping material and a pipe coupling, are joined together by inserting one end of a piping material into a pipe coupling having a tapered and expanded diameter portion, and by causing the joint of these piping materials where they are overlapped with each other to be plastically deformed with the above processing dies.
BACKGROUND ART
In the prior art, joining of piping materials is usually achieved by means of press rolls rotatively driven to caulk the joint of the piping materials where they are overlapped with each other. However, the joining of piping materials by use of such rotatively driven press rolls unfavorably requires a complicated structure, leading to an expensive and large-sized device to make the handling of the piping materials in the site of piping operation quite troublesome.
Thus, the present applicant previously proposed a device for joining piping materials without using press rolls in the Japanese Provisional Patent Publication (KOKAI) No. 109536/1982, which involves YOSEZUME (a plural number of dies movable in the radial direction) as the caulking means which can approach the piping materials in the orthogonal direction to the axis of the piping materials, but this device also suffers a problem of complicated cam mechanism for interlocking the YOSEZUME.
Furthermore, the present applicant proposed a device for joining piping materials in the Japanese Provisional Patent Publication (KOKAI) No. 142729/1982, in which a pair of dies are allowed to approach relative to each other in a direction parallel to the axis of the piping materials by use of cams which are movable in the orthogonal direction to the axis of the piping materials to achieve joining of the piping materials. Nevertheless, there remains a problem that the dies fail to keep their parallel face-to-face relationship because of the structure in which the dies are only pushed at their back portions by the cams to receive greater resistance from the piping materials at their portions facing to the piping materials to break the parallel relationship therebetween, whereby said portions are slightly opened or lifted up from the surface of the piping material as compared with the back portions thereof, so that the joining of a piping material and a pipe coupling cannot be achieved properly.
DISCLOSURE OF THE INVENTION
This invention has been accomplished for the purpose of overcoming such problems inherent in the prior art and providing a device for joining piping materials which can achieve joining of piping materials, such as a piping material and a pipe coupling, properly, wherein dies disposed in the device can keep their parallel posture using a simple structure.
The device for joining piping materials according to this invention comprises a first processing die 24 in which a pair of half-die members 28 each having inclined cam faces 28a formed thereon are combined through connecting means, the above half-die members being mutually approachable in the direction parallel to the axis of the piping materials to be joined by use of a means for moving them closer or farther relative to each other; a second processing die 26 having a similar constitution to that of the first processing die 24, composed of a pair of half-die members 28, to be disposed symmetrically relative to the axis of the first processing die 24 and the piping materials; a first and a second box-shaped cam housing 2 and 12 for receiving the above two processing dies 24 and 26, respectively, and is disposed to oppose each other so as to move said pair of die members closer to each other, wherein the above first and second box-shaped cam housings 2 and 12 having cam faces 10a and 12a, respectively, which push the inclined cam faces 28a formed on the above pair of half-die members 28, so as to move the above pair of half-di
REFERENCES:
patent: 4257135 (1981-03-01), Moebius
patent: 4328608 (1982-05-01), Gibson
patent: 4418458 (1983-12-01), Hunter
patent: 4483056 (1984-11-01), Schwalm et al.
patent: 4696085 (1987-09-01), Sauder
Gotoh Taiji
Katoh Yoshinori
Yamamoto Hidetoshi
Mie Horo Co., Ltd.
Watson Robert C.
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