| 摘要 |
<p>A pipe fitting equipped with a circular cylindrical shaped male body, a circular cylindrical shaped female body into which the male body is inserted, and a resilient ring shaped stopping member that locks and joins the male body and the female body, wherein:
the male body has, from a base end thereof toward a distal end thereof, a first circular cylindrical portion, a second circular cylindrical portion having an outer diameter that is the same as that of the first circular cylindrical portion or an outer diameter that is smaller than that of the first circular cylindrical portion, and an outer tapered portion that slopes inward from the second circular cylindrical portion;
the male body is also equipped with an annular groove between the first circular cylindrical portion and the second circular cylindrical portion;
the female body has, from an opening into which the male body is inserted toward the inside, when the male body has been inserted, a first inner wall face that makes contact with the first circular cylindrical portion, a second inner wall face that makes contact with the second circular cylindrical portion, and an inner tapered portion that slopes inward from the second inner wall face;
the female body is also equipped with a two-step groove between the first inner wall face and the second inner wall face, the two-step groove being formed from a locking groove at the opening side thereof and an adjacent containing groove at the inside thereof, and the resilient ring shaped stopping member is disposed in the two-step groove;
the inner radius of the female body at a portion where the containing groove is formed being longer than the length of the sum of the radius of the second circular cylindrical portion and the diameter of a cross sectional face of the resilient ring shaped stopping member, and the depth of the annular groove in a radial direction of the male body from the first circular cylindrical portion and the depth of the locking groove in a radial direction of the female body from the first inner wall face are formed greater than the diameter of the cross sectional face of the resilient ring shaped stopping member; and
the resilient ring shaped stopping member has a gap formed as a cut-away portion from a ring shape, with the inner peripheral diameter of the resilient ring shaped stopping member being smaller than the outer diameter of the second circular cylindrical portion.</p> |
