Title:
PIPE JOINT STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2013/137241
Kind Code:
A1
Abstract:
The present invention addresses the problem of eliminating the influence of the tolerance of the receiving end or the inserted end and facilitating the connecting of a pipe joint using a lock ring. In this pipe joint structure, a lock ring groove (12) is formed in the inner surface of a receiving end (2), a lock ring (10) is housed within that lock ring groove (12), and a retaining protrusion (11) that protrudes toward the outer-diameter side is provided at the tip of the inserted end (1). When an attempt is made to pull the inserted end (1) out from the receiving end (2) after the inserted end (1) has been inserted into the receiving end (2), the retaining protrusion (11) makes contact with the lock ring (10) and is retained. In addition, the configuration is such that the lock ring (10) is equipped with a single-split ring part (10a) that opens at one location in the circumferential direction, and with protrusions (10b) that rise in the outer-diameter direction from the ring part (10a), and the receiving end (2) and the ring part (10a) are centered when the protrusions (10b) directly contact the bottom face of the lock ring groove (12). The lock ring groove (12) is equipped with a tapered inner surface part (12e), the diameter of which increases gradually from the opening in the pipe axial direction of the receiving end (2) to the interior in the pipe axial direction, and the protrusions (10b) are housed opposing that tapered inner surface part (12e).
Inventors:
YAMAMOTO MASAYUKI (JP)
YOSHIDA YOSHINORI (JP)
SHITABO TETSUJI (JP)
YOSHIDA YOSHINORI (JP)
SHITABO TETSUJI (JP)
Application Number:
PCT/JP2013/056782
Publication Date:
September 19, 2013
Filing Date:
March 12, 2013
Export Citation:
Assignee:
KURIMOTO LTD (JP)
International Classes:
F16L21/08
Foreign References:
| JPH04133093U | 1992-12-10 | |||
| JP2000028060A | 2000-01-25 | |||
| JP2009144896A | 2009-07-02 | |||
| JP2006336712A | 2006-12-14 | |||
| JP2003214576A | 2003-07-30 | |||
| JP2000130659A | 2000-05-12 | |||
| JPH11118081A | 1999-04-30 |
Attorney, Agent or Firm:
KAMADA Bunji et al. (JP)
Bunji Kamata (JP)
Bunji Kamata (JP)
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