JPH0642158Y2 - Pipe fitting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint used at a branch point of a fluid such as liquid or gas.

[0002]

2. Description of the Related Art A pipe joint used at a branching / collecting point of a pipeline is open in at least three directions, but in piping work, the pipe can be easily inserted through the opening and completely inserted to an appropriate position. It is necessary to. That is, if the pipe is inserted too shallow, it will come out immediately even if it is impacted or shaken a little, and if it is inserted too deeply, it may project into the flow path communicating with other openings and hinder smooth fluid movement. is there. Therefore, it is desirable for the operator to know that the pipe has been inserted to an appropriate depth immediately without measuring the insertion of the pipe one by one. As shown in FIG. 4, as a pipe joint that is open in both directions or more, a ridge 11 that projects at right angles to the three openings
Designed so that if a, 11b, ... Are provided and inserted until the pipe end hits the ridge, the position is automatically determined.

[0003]

The pipe joint shown in FIG. 4 is generally manufactured by casting. Ridge 11 in FIG.
The a and 11b are formed by cutting and inverting the recessed grooves in the core. However, as is well known, defects such as shrinkage cavities and gas holes are likely to be concentrated in the root of the ridge having a T-shaped cross section, and the tissue is rough due to the partial thick wall, which may cause breakage when an external force is applied.

In order to make a pipe joint that opens in three directions as shown in FIG. 4 using a metal plate as a material, even if a T-shaped pipe is formed by welding, the ridges 11a, 1 are formed by the subsequent press forming process.
It is almost impossible to project 1b. In recent years, however, there is a strong demand for weight reduction and price cuts in plumbing work, but in the case of integrally molded metal products that are much lighter than cast products and can be cut down in unit price by mass production, the above stopper It was extremely difficult to provide a prominent ridge at each opening. (This also applies to mass production and injection molding of synthetic resin that is easy to reduce in weight, and it seems that complicated dies and complicated work do not fit economically at all.) The present invention solves the problems described above. In order to achieve this, an object of the present invention is to provide a pipe joint that automatically stops each pipe inserted from each opening portion at an appropriate insertion position, even though a metal material is integrally molded.

[0005]

The pipe joint according to the present invention comprises:
It is composed of a pipe joint main body integrally formed with a metal material and a stopper piece fitted into the pipe joint main body, and the stopper piece is a short cylinder loosely fitted to the inner circumference of one opening and at least half of the other opening. The above-described problem is solved by integrally joining a partially cut-out flexible cylinder that is loosely fitted to the circumference or more with each opening direction.

[0006]

[Function] Since the flexible cylinder loosely fitted in the openings in both directions on both sides has a notch, when the cylinder is pressed from the outside, the notch shrinks, and in some cases both end faces overlap and intersect to form an ellipse. Elastically deforms in a circular shape, and due to this deformation, the top surface of the cylinder that is loosely fitted to the remaining one opening that is joined to the opposite side of the notch is pulled and relatively reduces the overall height of the stopper piece. Occurs. Notches of the stopper piece The worker presses the outer circumference of the flexible cylinder from both sides, fits the stopper piece into the pipe joint body from the opening, and releases the hand at the center point where the three openings branch off. The overall height of the cylinder returns to its original state, and the end faces of the cylinder that loosely fits into one opening and the notch flexible cylinder that loosely fits into another opening each form a step in the opening. Substitute a function.

[0007]

EXAMPLE A pipe joint is formed by a combination of a pipe joint body 1 and a stopper piece 3, and the former uses a metal pipe body having good formability such as various steel pipes, stainless steel pipes, and copper pipes as a base material according to use conditions, and a sheet metal press. A desired outer shape is formed by a known processing method such as bulge processing. Stopper piece 3
Is made of synthetic resin or metal (such as spring steel) that is easily elastically deformed. FIG. 1 shows an embodiment of the present invention, a pipe joint body 1 made of a metal material, pipes 2A, 2B, 2C inserted into the openings in these three directions, and end faces 21A, 2 of these pipes.
.. shows the stopper piece 3 with which 1B ,.
As shown in FIG. 2, a perspective view of the stopper piece 3 alone is composed of a short cylinder 31 and a flexible cylinder 32 to be joined therebelow,
The flexible cylinder 32 has a notch 33 in the opposite position to the short cylinder 31.
Is divided by. Figure 3 (a), (b), (c)
Is a vertical cross-sectional side view showing the action of fitting the stopper piece 3 to the pipe joint main body 1, and the stopper piece 3 whose total height is H in FIG. If the notch 33 is pressed and overlapped so that the total height H is smaller than the inner diameter D of the opening of the pipe joint body, and the pressure is released at a predetermined branch center point, the stopper piece 3 will have the original total height H.
Then, as shown in FIG. 3C, a step is formed on the opening surface in the three directions.

[0008]

[Effects of the Invention] As described above, the present invention is a pipe joint manufactured by the integral molding method of a metal material, which is most suitable for mass production and can easily cut down the unit price. It is inexpensive and there is little concern that internal defects will be included. Therefore, as long as the function of automatically determining the proper insertion depth of the pipe to be inserted from each opening is the same, the above-mentioned superiority is directly brought into effect at the time of implementation. It is also an advantage that you can freely choose the most suitable material from among a wide variety of materials according to the usage conditions.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a stopper piece according to an embodiment of the present invention.

FIG. 3 is a vertical cross-sectional side view showing the procedure of the embodiment by (a), (b) and (c).

FIG. 4 is a vertical sectional front view showing a conventional technique.

[Explanation of symbols]

 1 Pipe joint body 2 Pipe 3 Stopper piece 31 Short cylinder 32 Flexible cylinder 33 Notch H Total height of stopper piece (before deformation) D Inner diameter of opening

Claims (1)

[Scope of utility model registration request] 1. A pipe joint opening in three directions, comprising: a pipe joint main body integrally formed with a metal material; and a stopper piece fitted into the pipe joint main body, wherein the stopper piece is one opening inner circumference. A short cylinder that is loosely fitted into the tube and a partially cut-out flexible cylinder that is loosely fitted to at least a semicircle of the other opening are integrally joined according to the respective opening directions. Fittings.