Pipe Fittings

The pipe joint incorporates a movable fixing member to prevent unintended rotation of the rotary coupling member, addressing issues of disengagement and seal deterioration in existing designs, while reducing the need for large recesses and minimizing operational forces.

JP7651003B2Active Publication Date: 2025-03-25NITTO KOHKI CO LTD
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Patent Information

Application Number
JP2023556266
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Priority Date
2021-10-28
Filing Date
2022-10-07
Publication Date
2025-03-25
Estimated Expiration
2042-10-07

AI Technical Summary

Technical Problem

Existing pipe joints with rotary coupling members face issues with unintended rotation when a large force is applied, leading to potential disengagement and increased load on seal members, which can accelerate seal deterioration.

Method used

A pipe joint design featuring a movable fixing member that can be displaced between a release position and a fixed position, preventing unintended rotation of the rotary coupling member by engaging with the engaging protrusion when the rotary coupling member attempts to rotate in the opposite direction.

Benefits of technology

This design effectively prevents unexpected rotation of the rotary coupling member, reducing the need for large recesses and minimizing the force required for coupling, thereby extending the lifespan of seal members and improving operational reliability.

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Abstract

[Problem] To provide a pipe joint capable of preventing accidental rotation of a rotary connecting member in a connected state. [Solution] The pipe joint 1 is composed of a male pipe joint member 10 and a female pipe joint member 12 that are detachably connected. The female pipe joint member 12 comprises a rotary connecting member 24 capable of rotating on the outer peripheral surface 22a of a female-side body 22 and a movable fixed member 26 capable of pivoting in relation to the rotary connecting member 24. The rotary connecting member 24 has an engagement surface 38 facing toward a rear end part 36 of the rotary connecting member 24. When a male-side body 16 is inserted into the rotary connecting member 24 and the rotary connecting member 24 is caused to rotate to a connecting position, an engaging projection 18 engages with the engagement surface 38 to create a connected state in which the male-side body 16 and the female-side body 22 are in a sealed engagement. When the movable fixed member 26 is pivoted to a fixed position in this connected state, the movable fixed member 26 comes to a position of interfering with the engaging projection 18, and the rotary connecting member 24 is prevented from rotating from the connected position to a disconnected position where the engagement surface 38 does not engage with the engaging projection 18.
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