Abstract: A pipe joint and a joint connection device have simpler configurations while preventing fluid leakage and absorbing misalignment of shaft centers. A pipe joint includes a male joint and a female joint into which the male joint is inserted. The male joint has a male joint main body and a cap that is fixed at a base end of the male joint main body, with a male joint O-ring interposed between the cap and the male joint main body. The cross-section diameter of the male joint O-ring is 3 to 10 mm, and a clearance-between the male joint main body and the cap is 3 to 13% of the cross-section diameter of the male joint O-ring.

Abstract: A pipe joint including a female joint capable of further reliably preventing leakage of a fluid is provided. The pipe joint includes: a female joint; and a male joint configured to be inserted into the female joint. The female joint includes: a female joint body; a distribution pipe provided in the female joint body, the distribution pipe having a first orifice; a sleeve configured to move in an axial direction between the female joint body and the distribution pipe for opening and closing of the first orifice; and an elastic portion configured to press the sleeve toward a distal end side of the female joint body, the sleeve includes a first seal portion configured to seal a gap between the sleeve and the distribution pipe when the sleeve closes the first orifice, and the distribution pipe includes: a first seal surface sealed by the first seal portion; and a tapered surface slanted from a base end side of the distribution pipe toward the first seal surface with respect to the axial direction.

Abstract: Provided are a pipe joint and a joint connection device that have simpler configurations and yet can prevent fluid leakage and absorb misalignment of shaft centers. A pipe joint includes a male joint and a female joint into which the male joint is inserted. The male joint has a male joint main body and a cap that is fixed at a base end of the male joint main body, with a male joint O-ring interposed between the cap and the male joint main body. The cross-section diameter of the male joint O-ring is 3 to 10 mm, and a clearance between the male joint main body and the cap is 3 to 13% of the cross-section diameter of the male joint O-ring.

Abstract: The connector includes a male member with an engaging portion on its outer face, a female member with an inner space for receiving the male member and a pair of manipulating members provided in the female member from opposite sides. The engaging portion of the male member is received through and behind the pair of manipulating members in the inner space. Each manipulating member has a part which enters the track region of the engaging portion and an elastic piece. The coupling of the male and female members is reliably obtained by two opposite side engagements between the engaging portion of the male member and the pair of manipulating members and maintained by the thrusting force by the elastic piece.