Hose joint

Abstract

Provided is a hose joint by which an insertion position of a front end of a hose is stabilized to thereby enhance the sealing efficiency and a disconnecting strength between the outer surface of a nipple and the hose. When the hose (H) is inserted, the inner diameter of an inlet portion (3a) of an expandable and contractible sleeve (3) opposed to a decreasing diameter portion (1a2) is set to be larger than the outer diameter of the hose (H) which is inserted along the decreasing diameter portion (1a2) of a bulged portion (1a), whereby the front end of the hose (H) is smoothly introduced between the expandable and contractible sleeve (3) and the decreasing diameter portion (1a2) without causing the front end of the hose to butt against the inlet portion (3a) of the expandable and contractible sleeve (3) and can be inserted to a predetermined position. Thereafter, when pressed by a pressing surface portion (2b) in accordance with the axial movement of a fastening tool (2), the inner diameter of the inlet portion (3a) of the expandable and contractible sleeve (3) is set to be smaller than the outer diameter of the hose (H) inserted along the decreasing diameter portion (1a2) of the bulged portion (1a), whereby the hose (H) is held between the inlet portion (3a) of the expandable and contractible sleeve (3) and the decreasing diameter portion (1a2) of the nipple (1).

Description

technical field [0001] The present invention relates to a hose connector used for connecting flexible and easily deformable hoses such as silicone rubber. [0002] Specifically, it relates to a hose connector in which a hose is inserted along the outer peripheral surface of a nipple, and the inner peripheral surface of the hose is compressed against the The outer peripheral surface of the threaded pipe. Background technique [0003] In the past, such a hose connector has the following connector, which includes a nut connected to the second joint configured as a nipple, and is arranged on the internal peripheral surface behind the female thread of the nut and interposed between the front end of the hose. The front ring between the outer peripheral surfaces, the rear ring interposed between the inner peripheral surface of the rear end of the nut and the outer peripheral surface of the hose at a predetermined distance away from the front ring, and the second joint are inserted...

AI Technical Summary

Problems solved by technology

[0009] However, at this time, since the inner diameter of the front ring is formed to be approximately the same diameter as the outer diameter of the hose, it is difficult to insert the end of the hose into the front ring only by pushing the hose in, and there is a problem that the hose is not secure. There is a risk of threading the nut while the ground is pressed into a fixed position

If the nut is screwed in this way while the end of the hose is not fitted into the front ring, a reliable connection cannot be made, and as a result, there is a problem that the sealing performance between the outer peripheral surface of the fitting sleeve and the hose and the fall-off strength decrease.

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