JP3453596B2 - Plug-in fittings for fluid pipes - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called pipe joint, and is particularly suitable for connecting a fluid pipe such as a water pipe to be buried in soil, and the connection work can be performed by inserting the fluid pipe. The present invention relates to a plug-in type pipe joint.

[0002]

2. Description of the Related Art A water pipe, which is a fluid pipe, is buried in a wall or in soil unless there are special circumstances.
Since it must be piped everywhere, it must be connected by pipe fittings. In addition, such a fluid pipe such as a water pipe, once buried in the soil,
It is very difficult to check whether the connection state is perfect, that is, whether there is a fluid leak. From the above, it is required that the fluid pipes be connected so that the connecting work is simple and that the liquid-tight and air-tight state can be completely maintained after the connection. Of.

As for this type of fluid pipe, in place of the so-called "lead pipe" used in the past, a pipe made of synthetic resin or a molybdenum pipe has been used.
The reason for this is that molybdenum pipes of this type and fluid pipes made of synthetic resin do not rust even if they are buried in the soil, and they have a certain degree of flexibility, so construction work Because it will be easier. Since this type of synthetic resin fluid pipe has greater flexibility than "lead pipes", it can sufficiently follow changes in the soil due to ground subsidence or earthquakes to some extent. Yes, this is a "lead tube"
Is a major reason why it was used in large quantities instead of.

As a plug-in type pipe joint for connecting a synthetic resin fluid pipe therein, which maintains the liquid-tight and air-tight state while improving the connection workability described above, a typical example is shown in FIG. There are three types shown in FIGS.

First, in the plug-in type pipe joint shown in FIG. 7, the fluid pipe 70 in which the pipe supporting cylinder which is an independent component is inserted at the tip is inserted (inserted) into the insertion base portion of the joint pipe body. By inserting a wedge-shaped ring into the gap between the fluid pipe 70 and the insertion base of the joint pipe body, and finally fastening the fastening member to the outer periphery of the insertion base of the joint pipe body, The connection of 70 to the joint pipe main body can be easily performed on the basis of insertion work.

However, in the case of the plug-in type pipe joint of FIG. 7, since the fluid pipe is made of synthetic resin, the portion pressed by the wedge-shaped ring becomes smaller due to the secular change, which is possible. The fluid in the fluid pipe (when tap water is always under pressure) leaks into the soil through the gap. Also, if there is no pressure in the fluid in this fluid pipe (if it is tap water, it will be cut off), this time the water in the soil will flow back into the joint pipe body together with the earth and sand. In some cases, small sand particles may enter around the wedge ring or between the tube support cylinder and the fluid pipe, resulting in a state where liquid tightness and air tightness cannot be maintained.

Further, when the joint pipe main body of FIG. 7 and the fluid pipe connected thereto are reconstructed,
Since the tube support tube is tightly fitted to the tip of the fluid tube, it cannot be easily removed. For this reason, the tip of the fluid pipe must be cut off and another pipe support cylinder must be reinserted into a new cut, and in order to perform repairs, a pipe support cylinder suitable for the joint pipe body shown in FIG. 7 must be installed. It means that you must always have it ready.

For this reason, there has been proposed a plug-in type pipe joint in which the pipe supporting cylinder is integrated with the joint pipe body as shown in FIG. 8, but in the plug-in type pipe joint of FIG. , The problem of the pipe support cylinder separate from the joint pipe main body was solved, but in order to maintain the liquid tightness and airtightness between the fluid pipe and the pipe support cylinder, a circle is formed at the tip of the pipe support cylinder. The ridges of the ring must be integrally formed. Therefore, it is not possible to easily attach the fluid pipe to the tip of the pipe support cylinder by inserting it. Further, since the plug-in type pipe joint shown in FIG. 8 is intended for the fluid pipe made of a synthetic resin which easily deteriorates with time, it is completely different from the conventional plug-in type pipe joint shown in FIG. The same problem of sediment inflow will occur.

On the other hand, the plug-in type pipe joint shown in FIG. 9 was developed for the purpose of facilitating the reworking (reconstruction) of the pipe, for example. The O-ring for ensuring the performance is housed in the moving chamber provided in the tip portion of the joint pipe body. That, O-ring of the joint tube body, Ri is usually with each other to seal in the state shown in FIG. 9, the O-ring to adjust the length of the fluid tube is fitted on the outer periphery, Again
Once it's must removed from the joint pipe body fluid tube when or connect. In that case, it is necessary to insert a pushing jig (not shown) into the insertion base from the outside of the fluid pipe so that the O-ring can be pushed to the left of the movement guide in the drawing. A "gap" for inserting the tip of the pushing jig must be formed to some extent between the insertion base of the tube body and the insertion base.

This gap is not formed in consideration of the secular change of the O-ring, that is, the loss of the sealing performance between the fluid pipe and the insertion base, and therefore, the above-mentioned FIG.
Or, the same as in the conventional plug-in type pipe joint shown in FIG. 8, it causes the obstruction of the sealing property due to the inflow of sand grains. In other words, even in the plug-in type pipe joint of FIG. 9, it is considered that the workability is not so important that the sealing performance will not be sufficient in the long term.

In this type of plug-in type pipe joint, the insufficient sealing property causes a problem of so-called water leakage when the fluid pipe is a water pipe, for example. According to a survey by a city water department, the amount of wasted tap water is as high as 20%.
Not only is it an economic loss, but it is a large waste of resources. This indicates that this type of plug-in type pipe joint is not used to connect fluid pipes with sufficient liquid-tightness and air-tightness. The same applies when the pipe is a gas pipe.

By the way, the pipe support cylinder employed in the above-mentioned joint pipe main body of FIG. 7 functions to prevent the synthetic resin fluid pipe fixed in the joint pipe main body from collapsing. This is an important functional component. Therefore, if this pipe support cylinder is adopted, if it can be easily integrated into the joint pipe body side, the pipe support cylinder will be tightly attached to the tip of the fluid pipe when the fluid pipe is reconstructed. It is possible to easily remove the fluid pipe from the joint pipe because it will not be fitted.

As is the case with any of the pipe joints described above, the "molybdenum pipe" has been adopted as a water pipe in recent years as described above. It is easy and requires attention during construction. In particular, when the molybdenum pipe is inserted into the pipe joint shown in FIGS. 7 and 8, the outer surface of the molybdenum pipe is often scratched by about 0.1 mm due to the wedge ring in the pipe joint. If this damage is in the axial direction of the pipe support cylinder or the fluid pipe, the sealability at that portion may not be secured. This is because the pressure of tap water is several kilometers, and even if the scratch is 0.1 mm, water will leak from this gap.

Therefore, the inventor of the present invention makes full use of the advantages of this type of plug-in type pipe joint in which the connection of the fluid pipe can be made on the basis of the insertion work, while preventing fluid leakage even when used for a long period of time. The present invention has been completed as a result of various studies on how to achieve the above.

[0015]

The present invention has been made in view of the above circumstances, and the problems to be solved are as follows.
Regarding a plug-in type pipe joint for connecting a fluid pipe, it is to prevent fluid leakage even when used for a long period of time while improving the connection workability.

That is, the object of the invention according to claim 1 is to connect the fluid pipes by a simple operation by using the means of inserting the fluid pipes onto the pipe support. At the same time, it is possible to prevent the fluid from leaking due to the pressure in the fluid pipe, and it is also possible to prevent the backflow of the fluid into the fluid pipe by the pressure outside the fluid pipe, thereby preventing the fluid from leaking for a long time. It is an object of the present invention to provide a plug-in type pipe joint 100 that can be prevented and can improve the workability of reconnecting a fluid pipe with a simple configuration.

The object of the invention according to claim 2 is to achieve the same object as that of the invention according to claim 1, and to easily confirm whether the fluid pipe is completely inserted. Another object of the present invention is to provide a plug-in type pipe joint 100 that can be improved and can further improve the workability of connecting fluid pipes.

[0018]

In order to solve the above problems, first, the means adopted by the invention according to claim 1 will be described with reference to the reference numerals used in the following embodiments. Joint pipe main body 10 having a conduit in its core, and this joint pipe main body 1
0 has a pipe support cylinder 20 and a stopper piece 41 that engages with the outer surface of a fluid pipe 70 inserted outside the pipe support cylinder 20, and is stored in the joint pipe body 10 with a stopper ring 40. And a holding nut 60 that is screwed to the tip of the joint pipe body 10 and presses the stopper ring 40, and the pipe support cylinder 20 has an annular shape orthogonal to the axial direction thereof.
The pipe stop projection 21b is integrally formed and
A rubber cover 21 is formed on at least the surface of the support cylinder 20.
The liquid-tight engagement between the pipe support cylinder 20 and the fluid pipe 70.
Arm mounting 21 by a bayonet-type fitting 100 'for fluid pipes, characterized in that so as to ensure.

That is, the insertion joint 1 according to the first aspect of the present invention.
3, 00 accommodates the first packing 31, the second packing 32, and the stopper ring 40 in the joint pipe body 10 to which the pipe support cylinder 20 is attached, and the third packing 33 and the fourth packing 34. Presser nut 5
0 is screwed and integrated with the nut mounting portion 13 on the joint pipe body 10 side. Then, the fourth packing 34 and the stopper ring 4 in the integrated plug-in joint 100
0, the second packing 32, the first packing 31, and the outer circumference of the tube support cylinder 20, the tip portion 71 of the fluid pipe 70 is inserted as it is into the space, as shown in FIG. The connection of the fluid pipe 70 to the insertion joint 100 is completed.

In other words, the plug-in joint 10 as one body
0 is connected to the pipes for various devices as shown in FIG. 1 by the pipe connection portion 14, and then the tip end portion 71 of the fluid pipe 70 is inserted from the side of the holding nut 50, and the joint pipe of the holding nut 50 is inserted. The insertion joint 100 according to the present invention can connect the fluid pipe 70 and various pipes by fastening the main body 10 to the main body 10.

What happens when the tip portion 71 of the fluid pipe 70 is inserted into the insertion joint 100 is as follows.
First, the tip portion 71 of the fluid pipe 70 is fitted and inserted into the outer periphery of the pipe support cylinder 20 projecting from the end portion of the joint pipe body 10. While being supported by the pipe support cylinder 20, the opening of the press nut 50 is maintained. The fourth packing 34 near the portion is expanded and pushed inward without buckling. Next, the tip portion 71 of the fluid pipe 70 passes through the stopper piece 41 of the stopper ring 40 while pushing and expanding the second packing 32, and contacts the flange portion 21a of the pipe supporting cylinder 20 while spreading the first packing 31. Will be stopped.

On the other hand, looking inside the fluid pipe 70, on the surface of the pipe supporting cylinder 20 into which the fluid pipe 70 is inserted, as shown in FIGS. Was formed. These pipe stop ridges 21b
Is of the same quality as the rubber outer cover 21 made of an elastic material such as rubber forming the surface of the pipe support cylinder 20,
When the fluid pipe 70 is inserted into the pipe support cylinder 20, the inner surface of the fluid pipe 70 is not elastically deformed so as not to damage the inner surface of the fluid pipe 70. At the completion of the insertion, the elastic force restores the original shape of the fluid pipe 70. It is pressed against the inner surface of the tube 70.

Not only that, but also these pipe stop projections 21
Since b is an annular shape that is orthogonal to the axial direction of the pipe support cylinder 20, it is orthogonal to the axial scratches that tend to be attached to the inner surface of the inserted fluid pipe 70, and these scratches are surely secured. By filling it in, the sealability is secured.

When the fluid pipe 70 is fitted and inserted into a predetermined position of the insertion joint 100, each stopper piece 41 formed on the stopper ring 40 bites into the surface of the fluid pipe 70, and at the same time, the pipe support cylinder 20. The pipe stop ridge 21b ensures a seal on the inner surface of the fluid pipe 70. Therefore,
When the connection of the fluid pipe 70 to the pipe by the insertion joint 100 is completed, the stopper ring 40 on the insertion joint 100 side firmly bites into the fluid pipe 70, and the pipe stopper ridge 21b of the packing accommodating groove 16 is connected to the fluid pipe. Since the fluid pipe 70 comes into contact with the inner surface of the pipe 70 with a large frictional force, even if the fluid pipe 70 is to be pulled out from the insertion joint 100, the fluid pipe 70 is connected so that it cannot be pulled out.

Since the tip ends of the stopper pieces 41 constituting the stopper ring 40 are inclined toward the tip portion 71 of the fluid pipe 70, the stopper pieces 41 bite into the surface of the fluid pipe 70. Therefore, the fixation of the fluid pipe 70 to the plug-in pipe joint 100 is ensured.

The manner in which the fluid inside and outside the fluid pipe 70 connected to the insertion joint 100 is sealed as described above is as follows. First, when the pressure in the fluid pipe 70 is higher than the outside, the fluid in the fluid pipe 70 is
The tube stopper ridge 21b of the tube support tube 20 returns to its original shape by elastic deformation and is pressed against the inner surface of the fluid tube 70, and on the outer surface thereof, the rubber cover forming the surface of the tube support tube 20. Since it is sealed by 21 and the first packing 31, it does not leak outside. Even if the fluid in the fluid pipe 70 tries to go out beyond the first packing 31, the second packing 32, the joint pipe body 1
The fluid leakage will be prevented by the screwing surfaces of the nut mounting portion 13 of 0 and the press nut 50, the third packing 33 interposed between these, and the fourth packing 34 at the final stage. is there.

At this time, the water on the joint pipe body 10 side also tries to leak out between the joint pipe body 10 and the pipe support cylinder 20, but at least the surface of the pipe support cylinder 20 is made of elastic material such as rubber. Since it is made of a material, the flange portion 21a thereof is in liquid-tight contact with the surface of the mounting groove 11 on the joint pipe body 10 side, and water does not leak outside the tip portion 71 of the fluid pipe 70. Absent. Even if there is a leak,
It goes without saying that the sealing effect is then exerted by the first packing 31 and the like.

On the other hand, when the pressure outside the fluid pipe 70 becomes higher than that inside the fluid pipe 70, such as when water is cut off, sealing is performed in the opposite direction to the case where the pressure inside the fluid pipe 70 is high. It will happen. It is natural that sand or the like will not flow into the fluid pipe 70 if the outer high pressure is sufficiently sealed.

If the length of the fluid pipe 70 connected as described above is inappropriate, or if the connection must be re-established for some reason, the following may be performed. The workability is very easy. That is, in order to remove the fluid pipe 70, first, the press nut 50 screwed to the joint pipe body 10 is loosened and removed. Then, the stopper ring 40 becomes free, and the fluid pipe 70 is held only by the frictional force between its inner surface and the outer surface of the tube support tube 20. Of course, the outer periphery of the flange portion 21a of the pipe support cylinder 20 remains engaged in the mounting groove 11 on the joint pipe body 10 side.

Therefore, when the fastening nut 50 is unfastened and the fluid pipe 70 is pulled out, the pipe support cylinder 20 is left in the joint pipe body 10 and the fluid pipe 70 with the stopper ring 40 still attached to the surface thereof. Is drawn out. After that, another stopper ring 40 is inserted into the joint pipe main body 10 to assemble the entire insertion joint 100 again as an integral body, and the preceding stopper ring 40 on the pulled out fluid pipe 70 is intended to be cut off, and the fluid pipe concerned is cut off. After the length of 70 is adjusted, the end portion 71 of the fluid pipe 70 is inserted again into the joint pipe body 10 to complete the reconnection of the fluid pipe 70. As described above, according to the plug-in type pipe joint 100, unlike the conventional one, the work of taking out the pipe support cylinder 20 fitted to the tip of the tip portion 71 of the fluid pipe 70 is completely unnecessary. , Its reconstructability is extremely high.

Therefore, according to the plug-in joint 100 of the first aspect, the fluid pipe 70 can be connected to the pipe by a simple operation of simply inserting the tip portion 71 of the fluid pipe 70 into the opening portion of the holding nut 50. It is possible to do so, and the sealing property in that case is also extremely high by the seal of five stages or more.

In order to solve the above-mentioned problems, the means adopted by the invention according to claim 2 is the plug-in type pipe joint 1 according to claim 1.
00, "The joint pipe main body 10 corresponding to the tip end portion of the fluid pipe 70 is provided with an inlet / outlet hole 1 orthogonal to the axis thereof.
5 is formed, and the tip is made into a conical shape in the inlet / outlet hole 15 .
It is the provision of the probability認部member 60 freely and out. "

That is, in the plug-in type pipe joint 100 according to the present invention, the confirmation member 60 as shown in FIG. 6 is provided in the joint pipe body 10 corresponding to the tip portion of the fluid pipe 70. When the fluid pipe 70 is inserted into the plug-in type pipe joint 100, the confirmation member 60 is shown in FIG.
As shown in FIG. 5, the outer locking portion 63 is designed to largely project from the surface of the joint pipe body 10.

As shown in FIGS. 2 and 6, the tip of the inner locking portion 61, which is the inner portion of the confirmation member 60, has a conical shape and the shaft supported on the joint pipe body 10 side. Since the portion 62 can be inserted into and removed from the fitting hole 15 on the joint pipe body 10 side, when the tip portion 71 of the fluid pipe 70 is fully inserted, as shown in FIG. Is easily extruded by.

Therefore, the plug-in type pipe joint 100 according to the second aspect of the invention is, of course, the first packing 31 having the same function as the first aspect of the first aspect, and of course the confirmation member 60 when the fluid pipe 70 is inserted. Due to the protrusion from the surface of the joint pipe body 10, it can be easily confirmed from the outside that the fluid pipe 70 is completely inserted to the inside, and the connection work can be ensured.

[0036]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the invention according to each claim will be described with reference to a plug-in type pipe coupling 100 according to the embodiment shown in the drawings.
Since the invention according to each claim is substantially included, the following description will be focused on the plug-in pipe joint 100.

Further, as shown in FIG. 1, the plug-in type pipe joint 100 is used for connecting various equipment in a general household to a water pipe, but it is also suitable for one house. A large number will be used, and the total amount of each connection work will be large.

Now, as shown in FIGS. 2 and 3, this plug-in type pipe joint 100 has a pipe support cylinder 20 in which a flange portion 21a is engaged with a mounting groove 11 inside the joint pipe body 10.
And has the joint pipe body 1 as follows.
It is integrated with 0.

That is, the tube support cylinder 20 is composed of an inner tube 22 made of, for example, a metal material, and a rubber outer cover 21 integrally molded of a synthetic resin material such as rubber, which is baked and adhered to the surface thereof. Also, as shown in FIG. 3, a flange portion 21a slightly laterally projected so as to be engageable with a mounting groove 11 in a joint pipe body 10 described later.
Is integrally formed at one end of the rubber outer cover 21.
Further, in the pipe support cylinder 20, the side of the fluid pipe 70 is slightly thinned as shown in FIG. 2, and thus the fluid pipe 70 can be easily inserted into the pipe support cylinder 20. Moreover, the sealability can be sufficiently secured.

Further, the rubber surface mount 21 in this embodiment is used.
The rubber material that composes is made of a material that swells when it contains water.
~ 30% increase. Therefore, even if water leakage occurs, the rubber outer cover 21 absorbs water to ensure the sealing property.

The fitting of the pipe support cylinder 20 to the joint pipe body 10 as described above may be performed by forcibly fitting the flange portion 21a into the joint pipe body 10. That is, since the flange portion 21a of the tube support cylinder 20 is formed of an elastic material such as rubber, it is elastically deformed,
The flange portion 21a itself easily enters the mounting groove 11 of the joint pipe body 10. Then, the elastic material forming at least the surface of the pipe support cylinder 20 returns to the original state, so that the flange portion 21a of the pipe support cylinder 20 is returned.
Will be locked in the mounting groove 11 on the joint pipe body 10 side.

2 to 3, there is shown an insertion joint 100 according to the present invention, which is shown in FIG.
As shown in FIG. 4, the joint pipe main body 10 having the pipe support cylinder 20 attached as described above, and the packing formed on the right side of the pipe support cylinder 20 side flange portion 21a in the joint pipe main body 10 in the drawing. The first packing 31 accommodated in the accommodating groove 16a, the second packing 32 accommodated in the packing accommodating groove 16b of the next stage, the stopper ring 40 inserted in the accommodating portion 12, and the next stage of the stopper ring 40 Arranged, the third packing 33 and the fourth packing 34
And a holding nut 50 assembled with.

In addition, in the plug-in type pipe joint 100 of this embodiment, as shown in FIGS. 2 and 3, the joint pipe body 1
The access hole 15 is located in the portion of the mounting groove 11 of No.
A check member 60 integrally formed of an elastic material such as rubber is attached in the inlet / outlet hole 15.

As shown in the enlarged view of FIG. 7, the joint pipe main body 10 has a pipe connecting portion 14 to be screwed to a pipe (not shown) at the lower end in the drawing. The mounting groove 11, the housing portion 12, and the nut mounting portion 13 described above are larger than the diameter of the fluid passage formed in the axial center of the shaft 14.
The inner diameter of is increased in this order. Of course,
The inner diameter of the fluid passage of the pipe connecting portion 14 and the inner diameter of the pipe support cylinder 20 are made substantially the same as shown in FIG.

Further, as shown in FIG. 2, the accommodating portion 12 formed in the joint pipe main body 10 has the insertion joint 1
A storage space for the stopper ring 40 is formed in the housing 00, and the storage space can be easily pulled out.

The plug-in type pipe joint 100 is a first pipe installed in the packing accommodating groove 16a of the joint pipe body 10.
The packing 31, the second packing 32 installed in the packing storage groove 16b of the next stage, the third packing 33 arranged between the nut mounting portion 13 of the joint pipe body 10 and the press nut 50, and the press nut 50. And a fourth packing 34 attached to the inner surface near the inlet.

The stopper ring 40 accommodated in the large diameter portion of the accommodating portion 12 of the joint pipe main body 10 has a plurality of stopper pieces 4 integrally formed on the inner periphery thereof as shown in FIG.
1 has a stopper ring 40.
2 is to be stored in the storage portion 12 of the joint pipe body 10 so that each stopper piece 41 faces the left side in FIG. As shown in FIG. 2, the stopper ring 40 has a "wedge shape" so that the stopper ring 40 can be inserted into an inclined surface formed on the inner surface of the holding nut 50.

As shown in FIG. 2, the holding nut 50 of this embodiment has a nut mounting portion 13 on the joint pipe body 10 side.
Although it is formed of metal as having a mounting portion 51 to be screwed to, it is not necessary for the diameter itself to change. Therefore, for example, synthetic resin or the like is used as the material. However, the stopper ring 40 is preferably made of metal.

A first packing storage groove 52a is formed on the outer periphery of the mounting portion 51 of the holding nut 50.
The third packing 33 that seals with the nut mounting portion 13 of the joint pipe body 10 is housed in the packing first housing groove 52a. Further, a second packing storage groove 52b is formed in the holding nut 50, and the fluid pipe 7 to be inserted is inserted in the second packing storage groove 52b.
A fourth packing 34 that seals to zero is stored.

As a result of the above, each member is assembled and the insertion joint 1
When set to 00, as shown in FIGS. 2 and 3, between the outer circumference of the pipe support cylinder 20, the first packing 31, the stopper ring 40 assembled in the joint pipe body 10, and the second packing 32. A storage space for inserting the tip portion 71 of the fluid pipe 70 shown in FIG. 3 is formed therein.

Further, in this plug-in type pipe joint 100, as shown in FIG. 2, the joint pipe main body 10 corresponding to the tip portion of the fluid pipe 70 has an inlet / outlet hole 15 orthogonal to its axial center. And the confirmation member 60 is formed in the access hole 15.
Is provided so that it can enter and leave freely.

That is, in this plug-in type pipe joint 100, a confirmation member 60 as shown in FIG. 6 is provided in the joint pipe body 10 corresponding to the tip portion of the fluid pipe 70. As shown in FIG. 6 (b), the member 60 is integrally molded on the substantially conical inner locking portion 61, the cylindrical shaft portion 62 on the lower side thereof, and the outer periphery of the lower end portion of the shaft portion 62. And a plurality of outer locking portions 63. The confirmation member 60 is integrally formed of a synthetic resin material such as rubber so that the inner locking portion 61 and the outer locking portion 63 can be elastically deformed. . Further, the shaft portion 62 of the confirmation member 60 has a diameter slightly smaller than the inner diameter of the inlet / outlet hole 15 formed on the joint pipe body 10 side, and the shaft portion 62 allows the inlet / outlet hole 15 to be formed.
You can freely move in and out of.

To attach the confirmation member 60 to the joint pipe body 10, the tip of the inner locking portion 61, which is the inner portion thereof, is forcibly fitted from the outside of the inlet / outlet hole 15 on the joint pipe body 10 side. However, since the outer locking portions 63 are formed to be relatively small, the outer locking portions 63 are forcibly fitted from the inside of the joint pipe body 10 so as to come out. There is. By attaching the confirmation member 60 to the inlet / outlet hole 15 of the joint pipe body 10, when the tip portion 71 of the fluid pipe 70 is sufficiently inserted into the joint pipe body 10, as shown in FIG. The member 60 is the fluid pipe 7
It is easily pushed out by 0.

[0054]

As described above, according to the first aspect of the present invention, as described in the above embodiment, "the joint pipe main body 10 having the pipe passage in the shaft center, and the inside of the joint pipe main body 10" are provided. And a stopper piece 4 that engages with the outer surface of the fluid pipe 70 inserted outside the pipe support cylinder 20.
Has a 1, a stopper ring 40 which is accommodated in the joint pipe body 10 is screwed to the distal end of the joint tube body 10 and a retaining nut 60 for pressing the stopper ring 40, the tube support tube 20 , An annular pipe stopper orthogonal to its axial direction
The ridge 21b is integrally formed, and the pipe support cylinder
Form a rubber cover 21a on at least the surface of 20,
Liquid-tight engagement between the pipe support cylinder 20 and the fluid pipe 70
Has its structural feature the insertion type pipe joint 100 'for fluid pipes, characterized in that so as to ensure by 21a, thereby, "insertion" onto the tube support fluid pipe 70 Fluid pipe 70
The connection between them can be performed by a simple operation, and it is possible to prevent the fluid from leaking due to the pressure in the fluid pipe 70. The plug-in type pipe joint 100 capable of preventing the reverse flow of the fluid, preventing the fluid from leaking for a long period of time, and improving the reconnection workability of the fluid pipe 70 with a simple structure. You can do it. Particularly, according to the invention of claim 1,
Then, (a) the number of pipe support cylinders 20 of the plug-in type pipe joint 100 of the present invention is small.
Since the rubber cover 21 is formed on the surface of this rubber,
The cover 21 is a fluid pipe 70 and a pipe support into which the fluid pipe 70 is inserted.
It is interposed between the cylinder 20 and the fluid pipe 70 and the pipe support.
Sufficient liquid tightness is ensured with the holding cylinder 20. (B) The pipe support cylinder 20 has an annular ring orthogonal to the axial direction thereof.
Since the tube-shaped ridge 21b in the shape of a pipe was integrally formed,
As described in paragraph 0023 above, the "inserted fluid pipe
The inner surface of 70 is perpendicular to the scratches in the axial direction,
Ensures sealability by reliably filling these scratches
Will be fulfilled. It also has the effect of
is there.

According to the invention of claim 2, the plug-in type pipe joint 100 according to the invention of claim 1,
The joint pipe body 10 would correspond to the tip portion of the "fluid tube 70, to form entry and exit holes 15 perpendicular to the axis, in this and out holes 15, the probability認部member 60 in which the tip and conical Since it is provided so that it can be freely moved in and out, it is possible to achieve the same effect as that of the invention of claim 1 above, and it is easy to check whether the fluid pipe 70 is completely inserted. Therefore, it is possible to provide the plug-in type pipe joint 100 capable of further improving the connection workability of the fluid pipe 70. Especially this contract
According to the invention of claim 2, (c) since the tip of the confirmation member 60 has a conical shape,
When the 70 is plugged in,
Confirmed that riding was done comfortably due to its conical tip
The protrusion of the member 60 to the outside is surely performed.
The effect is also exhibited.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a house illustrating a portion to which a plug-in type pipe joint according to the present invention is applied.

FIG. 2 is a partially enlarged cross-sectional view showing a state in which a fluid pipe is connected to the plug-in type pipe joint.

FIG. 3 is a partially cutaway perspective view showing a state in which a fluid pipe is about to be connected to the plug-in type pipe joint.

FIG. 4 is an exploded perspective view showing each component of the plug-in type pipe joint.

FIG. 5 shows a stopper ring used in the plug-in type pipe joint, (a) is a plan view with the lower half as a bottom surface,
(B) is a partially cutaway front view.

FIG. 6 shows a confirmation member used in the plug-in type pipe joint, (a) is a perspective view, (b) is a front view, and (c) is a side view.

FIG. 7 is a sectional view showing a conventional plug-in type pipe joint.

FIG. 8 is a cross-sectional view showing another conventional plug-in type pipe joint.

FIG. 9 is a cross-sectional view showing another conventional plug-in type pipe joint.

[Explanation of symbols]

100 plug-in type fittings 10 Fitting tube body 11 mounting groove 12 Storage 13 Nut mounting part 14 Piping connection 15 Access holes 16a ・ 16b Packing storage groove 20 tube support tube 21 rubber outerwear 21a Flange part 21b Pipe stop ridge 22 Inner pipe 31 First packing 32 Second packing 33 Third Packing 34 Fourth Packing 40 Stopper ring 41 Stopper piece 42 non-slip 50 Presser nut 51 Mounting part 52a Packing first storage groove 52b Packing second storage groove 60 Confirmation member 61 Internal locking part 62 Shaft 63 External locking part 70 fluid pipe 71 Tip

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16L 21/08 F16L 57/00

Claims (2)

(57) [Claims] 1. A joint pipe main body having a pipe passage in its axis, a pipe support cylinder mounted in the joint pipe main body, and a stopper piece engaging with an outer surface of a fluid pipe inserted outside the pipe support cylinder. has, provided with a stopper ring which is accommodated in the joint pipe body, a pressing nut is screwed to the distal end of the joint tube body performs pressing of the stopper ring, the tube support cylinder, the axis An annular pipe stop orthogonal to the direction of the center
The ridges are integrally formed and the pipe support tube
At least without forming a rubber cover on the surface,
Bayonet type pipe joint for a fluid pipe, characterized in that so as to ensure a fluid-tight engagement between the serial fluid pipe by said rubber mounting. To wherein portions of said joint tube body would correspond to the front end portion of the fluid tube, to form entry and exit holes perpendicular to the axis, in this and out the hole, check that the tip conical The plug-in type pipe joint for a fluid pipe according to claim 1, wherein the member is provided so as to be able to move in and out.