Pipe fittings

Abstract

To easily disassemble a pipe joint that has a locking mechanism.SOLUTION: A pipe joint 1 includes: a cylindrical female component 2 connected to a first hose 91 and having a female thread 25; a cylindrical male component 3 connected to a second hose 92 and having a male thread 33 to be fastened to the female thread 25; and a locking mechanism 6 having a recess 61 and a projection 62, which engage each other axially to restrict loosening of the male thread 33 when the male thread 33 is tightened against the female thread 25 to a tightening completion position. The recess 61 is provided in the female component 2, and the projection 62 is provided in the male component 3. The female component 2 includes: a bending part 71 provided with a recess 81 and bendable and deformable so as to move to one side in an axial direction where the recess 61 is disengaged from the projection 62; and a pressing part 72 extending from the bending part 71 to one side in the axial direction, and having a pressing surface 72a that is pressed toward a radial inward direction of the female component 2.SELECTED DRAWING: Figure 3

Claims

1. A cylindrical female component having a female thread is connected to a pipe, A cylindrical male component having a male thread that connects to other piping and is tightened into the female thread, A pipe fitting comprising: a loosening prevention mechanism having a first engaging portion and a second engaging portion that engage with each other axially to restrict the loosening of the male thread when the male thread is tightened to the completed tightening position in relation to the female thread, The first engaging portion is provided on one of the female and male parts, The second engaging portion is provided on the other of the female and male parts, The aforementioned one component is A first flexible portion is provided, and the first flexible portion is deformable to flex so that the first flexible portion moves in one axial direction to release the engagement with the second flexible portion, A first pressing portion having a pressing surface that extends from the first bending portion to one side in the axial direction and is pressed radially inward against the one part, A pipe joint comprising: a first contact portion, which is positioned radially inward from the first pressing portion, and which contacts the first pressing portion when the first bending portion undergoes bending deformation.

2. The first pressing portion has a pressing body extending in one direction in the axial direction, and a projection projecting radially outward from the pressing body toward the one component, The pipe fitting according to claim 1, wherein the radially outer end face of the projection is the pressing surface.

3. The pipe fitting according to claim 2, wherein the pressing surface is treated with an anti-slip finish.

4. A first projection is provided on a part of the circumferential direction of one of the aforementioned parts, projecting radially outward; The other part further comprises a second projection that protrudes radially outward from a part of its circumferential direction, and whose circumferential position coincides with the first projection when the male screw is tightened to the completed tightening position, The pipe joint according to any one of claims 1 to 3, wherein the first bending portion and the first pressing portion are each composed of a part of the first protruding portion.

5. A cylindrical female component having a female thread and connected to a pipe, A cylindrical male component having a male thread that connects to other piping and is tightened into the female thread, A pipe fitting comprising: a loosening prevention mechanism having a first engaging portion and a second engaging portion that engage with each other axially to restrict the loosening of the male thread when the male thread is tightened to the completed tightening position in relation to the female thread, The first engaging portion is provided on one of the female and male parts, The second engaging portion is provided on the other of the female and male parts, The aforementioned one component is A first flexible portion is provided, and the first flexible portion is deformable to flex so that the first flexible portion moves in one axial direction to release the engagement with the second flexible portion, The first pressing portion extends from the first bending portion toward one side in the axial direction and has a pressing surface that is pressed toward the radially inward direction of the one part, A first projection is provided on a part of the circumferential direction of one of the aforementioned parts, projecting radially outward; The other part further comprises a second projection that protrudes radially outward from a part of its circumferential direction, and whose circumferential position coincides with the first projection when the male screw is tightened to the completed tightening position, The first bending portion and the first pressing portion are each composed of a part of the first protruding portion, The first projection is formed with an axial slit extending from one axial side to the other axial side, and a radial slit extending radially inward from the other axial end of the axial slit. The portion of the first protrusion on the other axial side of the radial slit is designated as the first flexible portion. A pipe joint in which the portion of the first protrusion radially outward from the axial slit is defined as the first pressing portion.

6. The aforementioned one component is further provided with a first contact portion which is positioned radially inward from the first pressing portion and which the first bending portion contacts when the first bending portion undergoes bending deformation. The pipe joint according to claim 5, wherein the portion of the first protrusion that is radially inward from the axial slit and on one side of the radial slit in the axial direction is the first contact portion.

7. A cylindrical female component having a female thread and connected to a pipe, A cylindrical male component having a male thread that connects to other piping and is tightened into the female thread, A pipe fitting comprising: a loosening prevention mechanism having a first engaging portion and a second engaging portion that engage with each other axially to restrict the loosening of the male thread when the male thread is tightened to the completed tightening position in relation to the female thread, The first engaging portion is provided on one of the female and male parts, The second engaging portion is provided on the other of the female and male parts, The aforementioned one component is A first flexible portion is provided, and the first flexible portion is deformable to flex so that the first flexible portion moves in one axial direction to release the engagement with the second flexible portion, The first pressing portion extends from the first bending portion toward one side in the axial direction and has a pressing surface that is pressed toward the radially inward direction of the one part, The other part is, The second engagement portion is provided, and the second flexible portion is deformable to flex so that the second engagement portion moves in the other axial direction where the engagement with the first engagement portion is released, A pipe joint comprising: a second pressing portion extending from the second bending portion toward the other axial direction and having a pressing surface that is pressed toward the radially inward direction of the other component.

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