JP2556566Y2 - Piping fittings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint for connecting a pipe to a tank or the like for a fuel pipe, an oil pipe, a water pipe, or the like.

[0002]

2. Description of the Related Art Conventionally, this type of joint is formed in a cylindrical shape as shown in FIG.
a having a larger diameter than the through hole 11a in the center
It comprises a joint body 11 having a joint 1b and a pipe 12 having a distal end penetrating into a lateral hole 11c provided on a side surface of the joint body 11 and communicating with the cavity 11b. And
When using this joint, a bolt 13 having a communication hole 13a in the shaft is passed through the through hole 11a of the joint body 11, and the joint body 11 is inserted into the tank 16 by the bolt 13 through gaskets 14, 15. The pipe 12 is connected to the tank 16 so as to be fixed.

[0003]

However, in the above-mentioned conventional pipe joint, the joint body 11 is integrally formed and the cavity 1 having a larger diameter than the through hole 11a is formed in the body 11.
Due to the presence of 1b, there is no other method than cutting and forming a columnar material, and this cutting work was very troublesome. The present invention has been made to address the above problems, and an object of the present invention is to provide a piping joint that can be easily formed.

[0004]

In order to achieve the above object, the constitution of the present invention is characterized in that it is formed in a cup shape and has a hole in the bottom surface and a semicircular notch in the side surface. A second shell formed in a cup shape having a diameter smaller than that of the first shell, having a hole in the bottom surface, and having a semicircular notch in a side surface; The second shell is press-fitted into the first shell with the opening surfaces facing each other and the positions of the notches of the first and second shells are aligned, and the inner peripheral surface of the first shell and the second shell are arranged. And the end of the pipe is made to penetrate into the circular hole formed by both the notches of the first and second shells, and the inner peripheral surface of the circular hole and the outer peripheral surface of the pipe are Has been brazed.

[0005]

In the present invention constructed as described above, since both the first and second shells are formed in a cup shape, the first and second shells can be easily formed by press working. Then, since the pipe joint is formed by press-fitting and brazing using the first and second shells thus formed, according to the present invention, it takes time and effort such as cutting work as in the prior art. The pipe joint to be connected to the tank or the like can be easily manufactured without going through the process.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG.
2 is shown in FIG. 2, and FIG.
Only the joint as viewed along line -2 is shown.

This piping joint includes first and second shells 22 and 23 formed in a cup shape.
Is set substantially equal to the inner diameter of the first shell 22, and the second shell 23 is fitted into the first shell 22 with the opening surfaces facing each other. These first and second
Circular holes 22a, 23 are provided at the centers of the bottom surfaces of the shells 22, 23, respectively.
a and the first and second shells 22,
On the side of 23, cutouts 22b and 23b are formed in a semicircular shape. These semicircular notches constitute a circular hole in a state where the first and second shells 22 and 23 are united, and the end of the tube 24 enters and is fixed in the circular hole.

The method of manufacturing such a pipe joint will be described. The first and second shells 22 and 23 are formed by press working, respectively. In this processing, concentric cutting marks are left on the press dies that are pressed onto the surfaces of the bottom surfaces of the first and second shells 22 and 23.
If the cutting trace in this case is expressed by a ten-point average roughness R _Z (the difference between the median height of the peak and the median height of the valley in the cross-sectional curve of the machine surface expressed in micron units), point mean roughness R _Z is desirably about 20Z～40Z.
As a result, concentric irregularities as shown in FIG. 3 are formed on the surfaces of the bottom surfaces of the first and second shells 22 and 23 (portion A in FIG. 2).

Next, in a state where the end of the pipe 24 is fitted into the notch 22b of the first shell 22, the opening surface of the second shell 23 is opposed to the opening surface of the first shell 22 and the second shell The notch 23b of the first shell 22 is replaced with the notch 2b of the first shell 22.
2b and the first shell 2
Press in on the inner circumference of 2. By this press-fitting, the second shell 23 and the tube 24 are temporarily fixed to the first shell 22. Thereafter, the inner peripheral surface of the first shell 22 and the outer peripheral surface of the second shell 23 are brazed, and the first and second shells 23 and 24 are brazed. 2 shell 22, 2
The circular hole formed by the two notches 22b and 23b and the outer peripheral surface of the tube 24 are brazed. Thus, the sealing of the fitting portion between the first shell 22 and the second shell 23 is ensured, and the sealing between the notches 22b, 23b and the pipe 24 is also ensured.

[0010] The pipe joint thus configured is connected to the tank 2.
In the case of assembling to 1, the gaskets 25 and 26 and the bolt 27 are used. The gaskets 25 and 26 are formed in an annular shape from copper (which may be synthetic leather, iron, or synthetic rubber).
7, and the gasket 26 is interposed between the bottom surface of the second shell 23 and the tank 21. The shaft portion 27b of the bolt 27 passes through the holes 22a, 23a of the first and second shells 22, 23 and is screwed to the tank 21. The shaft portion 27b has the same hole as the hole 27b1 in the axial direction. A lateral hole 27b2 communicating with 27b1 is provided.

When the bolt 27 is tightened in this manner, the gaskets 25 and 26 are connected to the first and second shells 2.
Since it penetrates into the concentric irregularities provided on the surfaces of the bottom surfaces of the bases 2 and 23, the sealing of this part is kept high. When the pipe joint is assembled to the tank 21 as described above, the pipe 24 communicates with the inside of the tank 21 via the first shell 22, the second shell 23 and the bolt 27.

As described above, according to the pipe joint according to the above embodiment, the joint can be easily manufactured by press working and brazing, and the airtightness is kept high.

In the above embodiment, an example in which the pipe joint according to the present invention is applied to a straight pipe has been described.
The case where the pipe joint according to the present invention is applied to a curved pipe will also be described. When the curved pipe 28 as shown in FIG. 4 is used, the curved pipe 28 must be press-fitted into the joint body 11 from the side if the conventional pipe joint described above (see FIG. 6) is used. At this time, the curved tube 28 is easily deformed. However, in the case of the pipe joint as in the above embodiment, the curved pipe 28 is deformed because the curved pipe 28 is fitted to the first and second shells 22 and 23 by applying a force in the direction of the arrow in FIG. Disappears.

Next, a modification of the pipe joint according to the above embodiment will be described. FIG. 5 shows a piping joint according to this modification. The piping joint includes a stopper piece 22 c extending from the end surface of the first shell 22. And
When using such a pipe joint, the tank 21
When the stopper piece 22c is engaged with the concave portion 21a provided in the above, the rotation of the pipe joint at the time of tightening the bolt 27 can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which a pipe joint according to an embodiment of the present invention is assembled to a tank.

FIG. 2 is a cross-sectional view showing only a pipe joint taken along line 2-2 in FIG.

FIG. 3 is an enlarged sectional view of a portion A in FIG. 2;

4 is an external view showing an example in which the pipe joint of FIG. 1 is applied to a curved pipe.

FIG. 5 is an external view showing a modified example of the piping joint of FIG. 1;

FIG. 6 is a cross-sectional view showing a state where a conventional pipe joint is assembled to a tank.

[Explanation of symbols]

21: tank, 22: first shell, 22a: circular hole, 2
2b notch, 22c stopper piece, 23 second shell, 23a circular hole, 23b notch, 24 pipe, 2
5, 26 ... gasket, 27 ... bolt, 28 ... curved pipe.

Claims (1)

(57) [Scope of request for utility model registration] 1. A first shell formed in a cup shape and having a hole in a bottom surface and a semicircular notch in a side surface, and a first shell formed in a cup shape having a smaller diameter than the first shell. A second shell having a hole and a semicircular notch on the side surface, wherein the opening surfaces of the first and second shells are opposed to each other, and the positions of both notches of the first and second shells are determined. At the same time, the second shell is press-fitted into the first shell, the inner peripheral surface of the first shell and the outer peripheral surface of the second shell are brazed, and both the notches of the first and second shells are cut out. A pipe joint characterized in that an end of a pipe is made to penetrate into a circular hole formed by (1), and an inner peripheral surface of the circular hole and an outer peripheral surface of the pipe are brazed.