FLUID PIPE JOINT DEVICE AND JOINT

Japanese Patent JP2023166759

A

To provide a fluid pipe joint device capable of confirming a required amount of fastening of a connection nut, and capable of preventing loosening of the connection nut by maintaining the required amount of the fastening.SOLUTION: A fluid pipe joint device 3 includes a fluid pipe joint 3a and a locking tool 20. The fluid pipe joint 3a includes a first joint member 5 and a second joint member 10. The first joint member 5 includes a first connecting portion 7, and the first connecting portion 7 has a first shaft 8 and a connection nut 9. The second joint member 10 has a second shaft 13 (second connecting portion 12). A male screw 13a is formed on an outer periphery of the second shaft 13, and the first connecting portion 7 and the second connecting portion 12 are connected with each other by screwing of the connection nut 9 and the male screw 13a. The locking tool 20 includes a nut abutment portion 20a abutting on a backward side end face 9a of the connection nut 9, and regulates movement of the connection nut 9 to the male screw 13a in a retreat direction 22 in a state of being attached to the fluid pipe joint 3a.SELECTED DRAWING: Figure 3

JP6250292	A screw contact for connecting the tube end where flange attachment of the two pipes was carried out
WO/2015/039832	PIPE CONNECTION ARRANGEMENT, HIGH-PRESSURE FLUID LINE SYSTEM OF A DOUBLE INTERNAL COMBUSTION ENGINE, DOUBLE INTERNAL COMBUSTION ENGINE AND USE OF A TENSION NUT

KANO KAZUHIRO

JP2022077522A

November 22, 2023

May 10, 2022

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MIRAI IND

F16L19/025

Koji Hirose

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