JP2004092679A - Pipe joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint wherein a main body is less prone to be slipped off in comparison with a conventional one. <P>SOLUTION: An adaptor 3 is fitted to the main body 2 holding a pipe 1, the adaptor 3 is fastened and fixed to an apparatus and the like by a fastening member 5 from its outer part, a clearance displaceable in the outer peripheral direction is formed between an outer part in the circumferential direction of an engagement area of the main body 2 and the adaptor 3, and the fastening member 5, and a clearance between an inner periphery of the fastening member 5 and an outer periphery of the body member 2 is determined to be small in an area B on a disengagement direction side of the main body 2 with respect to the engagement area A of the main body 2 and the adaptor 3. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a pipe joint for connecting pipes.
[0002]
[Prior art]
Conventionally, a pipe joint has been used to connect a pipe for transferring a fluid.
[0003]
As shown in FIG. 6, the pipe joint has an adapter 22 forcibly fitted in a body 21, and is integrally fastened from the outside with a nut 23 to be fixed to a device or the like (not shown). By the way, when the adapter 22 is fitted into the body main body 21, the body main body 21 temporarily expands in diameter. Therefore, a slight clearance is provided between the outer circumference of the body main body 21 and the inner circumference of the nut 23. Fluid tightness is ensured by a seal packing 24 interposed between the adapter 22 and devices and the like.
[0004]
This pipe joint has the advantage that the elbow-shaped body main body 21 can be rotated to change its direction as required even after it is attached to equipment or the like.
[0005]
However, if an unexpectedly strong force acts in an oblique direction by hooking a foot on the pipe during use, there is a problem that the body body 21 fastened to a device or the like by the nut 23 and the adapter 22 may come off. .
[0006]
[Problems to be solved by the invention]
Therefore, the present invention aims to provide a pipe joint in which the body body is harder to come out than in the past.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following technical means.
{Circle around (1)} The pipe joint of the present invention is of a type in which an adapter is fitted in a body main body holding a pipe, and the adapter is tightened from outside to a device or the like by a fastening member, and the body is fixed. A gap that can be displaced in the outer peripheral direction is provided between the tightening member and a circumferentially outward portion of a fitting area between the main body and the adapter, and a body body is provided with respect to the fitting area between the body body and the adapter. Is characterized in that a gap between the inner periphery of the fastening member and the outer periphery of the body main body is set to be small in the region in the detaching direction.
[0008]
In this pipe joint, the body body and the adapter are fitted together because there is a gap between the fastening member and the outer periphery in the circumferential direction outside the fitting area between the body body and the adapter. In addition, the gap between the inner periphery of the tightening member and the outer periphery of the body main body is set to be small in a region of the body main body in the detachment direction with respect to the fitting area of the body main body and the adapter. There is little room for relative displacement between the body and the tightening member, and the engagement force between the body body and the tightening member is improved.
{Circle around (2)} The fitting area between the body main body and the adapter may be such that an annular concave portion formed on one of the body and an annular convex portion formed on the other are fitted.
[0009]
With such a configuration, there is an advantage that the relative rotation between the body main body and the adapter is possible, and even if the body main body and the adapter are formed of a relatively soft resin, they can be sufficiently used. .
[0010]
As an aspect of the fitting area between the body main body and the adapter, an annular concave portion formed on the body main body and an annular convex portion formed on the adapter may be fitted, or conversely, the body main body may be fitted on the body main body. You may make it fit the formed annular convex part and the annular concave part formed in the adapter.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
As shown in FIGS. 1 to 5, the pipe joint according to this embodiment includes a synthetic resin body body 2 in an elbow-shaped synthetic resin body having a built-in structure for holding a pipe 1 (plastic tube). The adapter 3 is inserted from the connection end side 4 to a device or the like (not shown) and fitted (forcibly fitted), and the adapter 3 is tightened from outside to the device or the like by a fastening member 5 and fixed. It is a form to do.
[0013]
As the fastening member 5, a metal (or resin) nut having a thread groove is used. Fluid tightness is ensured by a seal packing 6 interposed between the adapter 3 and devices and the like.
[0014]
Here, the annular concave portion 7 formed on the body main body 2 and the annular convex portion 8 formed on the adapter 3 are fitted. An O-ring 9 for sealing is interposed between the body 2 and the adapter 3 at the back.
[0015]
At the time of assembling the pipe joint, the tightening member 5 is set outside the body main body 2 (see FIG. 3), the adapter 3 is fitted into the body main body 2, and the annular recess 7 in the body main body 2 and the outer periphery of the adapter 3 When the annular convex portion 8 is fitted, the body main body 2 temporarily expands in diameter (see FIG. 4), but the outer circumferential direction of the fitting area A between the body main body 2 and the adapter 3 is outward. And a gap capable of being displaced to the fastening member 5. The clearance between the inner periphery of the tightening member 5 and the outer periphery of the body main body 2 is set to be smaller in a region B of the body main body in the detaching direction with respect to the fitting region A of the body main body and the adapter. Finally, the seal packing 6 is attached (see FIG. 5).
[0016]
The gap 11 between the fastening member 5 and the circumferentially outward portion of the fitting area A between the body body 2 and the adapter 3 is specifically set to about 0.2 mm, and the fitting between the body body and the adapter is performed. The gap 12 between the inner circumference of the fastening member 5 and the outer circumference of the body main body 2 is set to about 0.5 mm in the area B of the body body in the detaching direction with respect to the joining area A.
[0017]
Next, a use state of the pipe joint of this embodiment will be described.
[0018]
In this pipe joint, a gap that can be displaced in the outer peripheral direction is provided outside the fitting area A between the body body 2 and the adapter 3 in the circumferential direction between the body 5 and the adapter 3. 3 with respect to the fitting area A between the body main body 2 and the adapter 3, the inner circumference of the tightening member 5 and the body Is small, there is little room for relative displacement between the body body 2 and the tightening member 5, and the engagement force between the body body 2 and the tightening member 5 is improved. There is an advantage that it is harder to escape than before.
[0019]
The fitting area A between the body 2 and the adapter 3 is such that the annular concave portion 7 formed on the body 2 and the annular convex portion 8 formed on the adapter 3 are fitted. There is an advantage that even if the adapter 3 is formed of a relatively soft resin, it can be sufficiently used.
[0020]
Furthermore, even after attachment to a device or the like, the direction can be changed by rotating the body main body 2 (elbow shape) as necessary. That is, there is an advantage that the body main body 2 can be very hard to come off from the pipe joint while enabling rotation as required in use.
[0021]
【The invention's effect】
The present invention is configured as described above and has the following effects.
[0022]
Since there is little room for relative displacement between the body main body and the tightening member and the engagement force between the body main body and the tightening member is improved, it is possible to provide a pipe joint in which the body main body is less likely to come off than before.
[Brief description of the drawings]
FIG. 1 is a half sectional view illustrating an embodiment of a pipe joint according to the present invention.
FIG. 2 is a half sectional view illustrating an exploded state of the pipe joint of FIG. 1;
3 is a half sectional view illustrating a state in which a fastening member is set outside a body main body in the pipe joint of FIG. 1;
FIG. 4 is a half sectional view illustrating a state where an adapter is fitted into a body main body with the pipe joint of FIG. 1;
FIG. 5 is a half-sectional view illustrating a state before the seal packing 6 is mounted on the pipe joint of FIG. 1;
FIG. 6 is a half sectional view illustrating a conventional pipe joint.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Piping 2 Body main body 3 Adapter 5 Tightening member 7 Annular concave part 8 Annular convex part A The fitting area B of a body main body and an adapter The area of the body main body in the detaching direction with respect to the fitting area of a body main body and an adapter.

Claims (2)

An adapter is fitted into the body body that holds the piping, and the adapter is tightened from the outside toward the device or the like by a fastening member, and is fixed, and the circle of the fitting area between the body body and the adapter is fixed. A gap that can be displaced in the outer circumferential direction is provided between the tightening member and the outer circumferential direction. Characterized in that a gap between an inner circumference of the body and an outer circumference of the body is set to be small. The pipe joint according to claim 1, wherein the fitting area between the body main body and the adapter is such that an annular concave portion formed on one of the fitting portions and an annular convex portion formed on the other are fitted.

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