JP3083365U - Water supply pipe joints - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the number of parts, simplify the configuration, reduce the labor and cost of assembling, and there is a risk of loosening or disengagement even if subjected to impact or torsion. To provide a highly reliable water supply pipe joint. A sleeve attached to an end of the first water pipe at a joint portion of a water pipe for water supply connecting a first water pipe and a second water pipe via a seal member. 3, an adapter 4 attached to the end of the second water pipe, and interposed between the sleeve and the adapter to connect the sleeve and the adapter, prevent the detachment, and rotate the sleeve and the adapter. And a ring body 5 that allows

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an improvement of a joint part of a water distribution pipe which is rotatable to absorb the twist of each water distribution pipe while connecting the first water distribution pipe and the second water distribution pipe via a sealing member. .

[0002]

[Prior art]

 Source water from the water source to the water treatment plant is filtered and then led to the distribution mains. This distribution main pipe is provided with a large number of saddle taps, and a water distribution pipe (also called a water supply pipe) is connected. That is, the water distribution pipe is branched from the water distribution main pipe, and tap water is supplied to a faucet (faucet) provided in each house.

[0003] Normally, a water distribution main is buried underground, and a water distribution pipe connected to the water distribution main is also buried underground. There is a height difference between the burial depth of the water distribution main pipe and the location where the water distribution pipe is drawn into the house, or there is some obstacle on the way.

[0004] Therefore, the water distribution pipe from the water distribution main pipe to the faucet of each house is not necessarily straight, but is bent as appropriate. For this purpose, a plurality of water distribution pipes are connected via joints.

[0005] Further, instruments such as a stopcock and a water meter (water meter) are provided in the middle of the water distribution pipe. At both ends of the equipment, the equipment and the water pipe are connected via joints.

[0006] Since earth pressure is applied to the water distribution pipe and the joint, rigidity that can withstand the earth pressure for a long period of time is required. At the same time, it must be able to withstand the impact force of heavy and heavy vehicles during traffic and earthquakes.

[0007] In order to provide sufficient rigidity and reliably withstand impact force, it is sufficient that these water pipes and joints are made of a metal material. No, it is necessary to absorb large swings and displacements.

In order to satisfy such demands, recently, a part of or the whole of a water distribution pipe has been formed into a corrugated pipe, and the shaking or displacement is absorbed by the corrugated portion, thereby causing breakage or breakage. To ensure safety.

[0009] Countermeasures have also been taken at the joints. FIG. 4 is a partial cross-sectional view of a joint part of a conventional water distribution pipe, and FIG. 5 is an enlarged view of a part thereof. A sleeve a is integrally attached to an end of the first water distribution pipe 1 by caulking or the like. The outer diameter of the distal end portion of the sleeve a is formed smaller than the outer diameter of the proximal end, and a ring member b for preventing detachment and a concave portion g into which the sealing member c is fitted are provided along the outer peripheral surface of the small diameter portion. .

An adapter e is integrally attached to an end of the second water pipe 2 via a nut d. An outer diameter portion of the adapter e at the tip is threaded, and a cap nut f is screwed into the threaded portion.

As described above, the first water distribution pipe 1 and the sleeve a are integrated, the second water distribution pipe 2 is integrated with the adapter e and the cap nut f, and then the sleeve a and the adapter e are rotatable. Linked to

Even if the first water distribution pipe 1 and the second water distribution pipe 2 are twisted by an external factor, or if the water distribution pipes 1 and 2 are twisted by themselves, the sleeve constituting the joint portion is formed. The a and the adapter e rotate in accordance with the torsion, and absorb the torsion and do not apply stress to the first and second water distribution pipes 1 and 2.

[0013]

[Problem to be Solved by the Invention] As described above, as a joint part of a conventional water distribution pipe, it has a configuration that does not cause any problem in terms of function, and is a practically satisfactory product. However, there are issues to be solved as described below.

That is, in addition to the sleeve a, the adapter e, and the ring body b, the cap nut f is required, the number of parts is large, the management of each is required, the configuration is complicated, and the assembling time is required. , Which is negatively impacting costs.

Since the adapter e and the cap nut f are fixed via the screw portion, there is a possibility that the screw may be loosened due to aging. In other words, the reliability of the joint is insufficient.

The ring member b for preventing detachment is made of a synthetic resin material having a thickness of about 3 mm. So that it fits in.

Therefore, it takes time and effort to attach the ring body b to the sleeve recessed part g, and the workability is poor. When impact or torsion is applied to each of the water distribution pipes 1 and 2, the impact is received by the ring body b at the joint portion. However, the material and shape of the ring body b may cause breakage or cracking.

The present invention has been made in view of the above circumstances, and its purpose is to reduce the number of parts, simplify the configuration, and reduce the assembling labor and cost. It is intended to provide a highly reliable water supply pipe joint without the risk of loosening or disengagement even when subjected to an impact or torsion.

[0019]

[Means for Solving the Problems]

 In order to satisfy the above object, a joint part of the water distribution pipe according to the invention of claim 1 is a joint of the water distribution pipe connecting the first water distribution pipe and the second water distribution pipe via a sealing member. A sleeve attached to an end of the first water pipe, an adapter attached to an end of the second water pipe, and a sleeve interposed between the sleeve and the adapter for connecting the sleeve and the adapter. And a ring body for preventing detachment and allowing rotation of the sleeve and the adapter.

According to a second aspect, a fitting concave portion is provided along an outer peripheral surface of the sleeve at a joint portion of the water supply pipe according to the first aspect, and a fitting recess is provided along an inner peripheral surface of the adapter. A positioning recess is provided opposite to the fitting recess, and the ring body has a circular or elliptical cross section, and is rotatably fitted over the positioning recess and the fitting recess. I do.

According to a third aspect of the present invention, in the joint portion of the water supply pipe according to the second aspect, a slope portion is provided at a tip end of the adapter so as to project obliquely from an inner diameter side toward an outer diameter side. Is fitted into the fitting recess of the sleeve, is formed to have an outer diameter protruding from the outer diameter surface of the sleeve, and is inserted into the fitting recess by the slope portion by inserting the tip of the adapter into the end of the sleeve. It is characterized by having an elastic force that can be suppressed.

According to a fourth aspect of the present invention, in the joint portion of the water supply pipe according to the third aspect, the ring body is provided at a position where the fitting concave portion of the adapter faces the positioning concave portion of the sleeve. It has a restoring force that expands the diameter over the concave portion.

[0023] By using the joint portion adopting the means for solving such a problem, the number of parts is reduced as compared with the conventional joint portion, so that the configuration can be simplified, and the labor and cost for assembling can be reduced. As a result, there is no risk of loosening or detachment even when subjected to impact or twist, and high reliability can be maintained.

[0024]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a water distribution pipe S, joints R provided at both ends of the water distribution pipe S, and another water distribution pipes S, S connected through the joint R, respectively. The cross section is shown.

Here, the water supply pipe S for water supply is formed by corrugating a stainless steel pipe to have flexibility. For example, SUS-316 is used as a material of the stainless steel pipe, and is particularly resistant to rust, and the corrugated portion exhibits strength higher than that of the stainless steel pipe.

[0026] Even if it is buried deep in the soil, the burial depth is not limited. In addition, since the corrugated portion can be bent freely in the range of 0 to 90 °, piping is not required, which helps to prevent leakage and contributes to cost reduction by shortening the construction period.

In the relationship where the right end of the water distribution pipe S shown at the center of the figure and the water distribution pipe S shown at the top are connected via the joint R, the water distribution pipe at the center is shown. S is referred to as a first water pipe 1, and the upper water pipe S is referred to as a second water pipe 2.

In addition, in a relationship in which the left end of the water distribution pipe S shown at the center and the water distribution pipe S shown at the bottom are connected via the joint R, the water distribution pipe at the center is connected. S is referred to as a second water pipe 2, and the lower water pipe S for water supply is referred to as a first water pipe 1. In other words, the name of each water supply pipe S is appropriately changed based on the joint R connecting these water supply pipes S. Hereinafter, the joint R will be described in detail.

FIG. 2 shows a part of the joint R in an enlarged and sectional view. The joint R of the water supply pipe S is composed of a sleeve 3, an adapter 4, a ring body 5, and a seal member 6. The sleeve 3 is made of a metal material and is directly attached to the end of the first water distribution pipe 1 by, for example, caulking, and is integrally connected.

The adapter 4 is made of a metal material, and has a threaded portion 7 formed at an outer diameter of an end portion thereof, and is screwed to a nut 8 attached to an end portion of the second water distribution pipe 2. . From this, it can be said that the adapter 4 is attached to the end of the second water pipe 2.

As a material of the ring body 5, for example, a stainless steel material or a copper material is used, which is larger in strength than a conventional synthetic resin material. Here, the cross section has a circular shape, but may have an elliptical shape, as long as at least the cross section is not rectangular.

The ring body 5 is interposed between the sleeve 3 and the adapter 4 as described later, prevents the sleeve 3 and the adapter 4 from being detached, and allows the sleeve 3 and the adapter 4 to rotate.

The seal member 6 is a so-called O-ring, and seals the sleeve 3 and the adapter 4 in an assembled state. That is, the joint portion R has a sealing function.

The outer diameter of the distal end of the sleeve 3 is formed in two steps. The top end is the first outer diameter portion 10 having the smallest diameter, and a seal member recess 11 into which the seal member 6 is fitted is provided.

The second outer diameter portion 12 having a larger diameter is provided with a fitting recess 13 into which the ring body 5 is fitted. Each of the fitting recess 13 and the sealing member recess 11 has a rectangular cross section. Between the second outer diameter portion 12 and the base end portion into which the first water distribution pipe 1 is fitted, there is a slope portion 14 formed at a predetermined inclination angle.

The outer diameter of the distal end of the adapter 4 is the same as the outer diameter of the proximal end of the sleeve 3. A slope 15 is provided at the tip of the adapter 4, and is formed at the same angle as the slope 14 formed on the sleeve 3.

The inner diameter of the distal end of the adapter 4 is formed in two steps. This leading-edge diameter is the first inner diameter portion 16 formed slightly larger than the diameter of the second outer diameter portion 12 of the sleeve 3, and the second inner diameter portion 16 having a smaller inner diameter at the base end side. The inner diameter portion 17 is formed slightly larger than the diameter of the first outer diameter portion 10 in the sleeve 3.

The first inner diameter portion 16 is provided with a positioning recess 18 along a peripheral surface of a portion facing the fitting recess 13. The ring body 5 is fitted over the positioning concave portion 18 and the fitting concave portion 13.

A slope 19 is also formed between the first inner diameter portion 16 and the second inner diameter portion 17, and the slanted portion 19 is connected to the end of the second outer diameter portion 12 of the sleeve 3 in an assembled state. Avoid contact. Escape. In the assembled state, the second inner diameter portion 17 elastically deforms the seal member 6 fitted in the seal member recess 11 into a crushed state.

As described above, in the joint R of the water distribution pipe, the seal member 6 is interposed between the first water distribution pipe 1 and the second water distribution pipe 2, and the sealing property is ensured. It is assumed that

The joint R is provided between the sleeve 3 connected to the first water pipe 1, the adapter 4 connected to the second water pipe 2, and the sleeve 3 and the adapter 4. And a ring body 6 which connects with the sleeve and the adapter, prevents the detachment, and allows rotation of the sleeve and the adapter.

That is, the joint portion R of the present invention connects the first water distribution pipe 1 and the second water distribution pipe 2 in a rotating manner, and causes an external twist on each of the water distribution pipes 1 and 2, or the joint itself. Absorb the torsion.

Further, the number of components constituting the joint R is smaller than that of the conventional joint, and the configuration can be simplified. Assembly is simple, workability can be improved, and costs can be reduced.

The connection operation of the sleeve 3 and the adapter 4 for forming the joint R can be described with reference to FIGS. 3 (A) to 3 (C). First, as shown in FIG. 3A, the seal member 6 is fitted into the seal member recess 11 of the sleeve 3 and the ring body 6 is fitted into the fitting recess 15.

That is, since the seal member 6 has a circular cross section and is made of synthetic rubber, the diameter of the seal member 6 is temporarily expanded by utilizing its elasticity, and the seal member 6 is fitted into the recess 11. In this state, the outer diameter of the seal member 6 is designed to protrude from the recess 11.

The ring body 6 is made of a metal material, and is partially cut in advance. The ring body 6 is once expanded and then fitted into the fitting recess 15. At this time, the outer diameter portion of the ring body 6 is designed to protrude from the recess 15.

Next, the inner diameter of the distal end of the adapter 4 is inserted into the outer diameter of the end of the sleeve 3. That is, the first inner diameter portion 16 of the adapter 4 passes through the first outer diameter portion 10 of the sleeve 3 and does not come into contact with the seal member 6 fitted therein.

As shown in FIG. 3B, the distal end of the first inner diameter portion 16 of the adapter 4 is inserted into the second outer diameter portion 12 of the sleeve 3, and the slope 15 at the distal end of the adapter is inserted into the ring body 5. Abut When the insertion of the adapter 4 is continued as it is, the inclined surface 15 slides smoothly because the cross section of the ring body 5 has a circular shape.

That is, although the ring body 5 is made of metal, the insertion of the adapter can be continued with only a relatively small resistance feeling by forming the slope 15 at the tip of the adapter 4. The ring body 5 has an elastic force that is reduced in diameter in accordance with the insertion of the slope 15, and is suppressed in the fitting recess 13.

As shown in FIG. 3C, after the slanted surface 15 of the adapter 4 has passed through the ring 5, the first inner diameter 16 contacts the ring 5. In this state, the ring body 5 is completely pushed into the fitting recess 13.

Before this, the slope portion 19 formed between the first inner diameter portion 16 and the second inner diameter portion 17 of the adapter 4 comes into contact with the seal member 6 and is gradually crushed and deformed. Then, as shown in the drawing, the second inner diameter portion 17 of the adapter 4 comes into contact with the seal member 6 and crushes and deforms the seal member 6 in the concave portion 11 for the seal member.

Finally, the configuration is as shown in FIG. That is, the restoring force acts on the ring body 5 that has been inserted to the position where the positioning recess 18 of the adapter 4 is opposed to the fitting recess 13 of the sleeve 3, and has been pressed and deformed so far. The diameter is expanded over the concave portion 18 for fitting and the concave portion 13 for fitting.

In this manner, the joint R is formed by a simple operation of inserting the adapter 4 after the seal member 6 and the ring body 5 are fitted in the sleeve 3 in advance. This eliminates the need for screw-in work using a cap nut as in the past, and saves labor and greatly improves workability. Moreover, there is no loosening of the screw, and a highly reliable joint can be obtained.

The joint R of the water distribution pipe is buried in the soil once used and is used semi-permanently. However, for some reason, the first water distribution pipe 1 and the second water distribution pipe are not used. You may want to leave 2 and.

That is, in order to provide the joint portion R that can be disassembled while satisfying the above conditions, a plurality of joints R are required in advance from the outer peripheral surface portion facing the positioning concave portion 18 of the adapter 4 to the positioning concave portion. A hole is provided.

In the joint R in the assembled state, for example, a pin is inserted into the hole, and the ring 5 is forcibly pushed into the fitting recess 13 side of the sleeve 3, and the sleeve 3 and the adapter 4 are detached as they are. , The connection between the sleeve 3 and the adapter 4 is removed. That is, the first water pipe 1 and the second water pipe 2 can be separated.

In addition, the joint 4, in particular, the adapter 4 has a structure in which the screw portion 7 is machined, and the nut 8 is screwed and attached to the second water pipe 2. It is not limited to.

That is, there are a wide variety of water distribution pipes, such as vinyl chloride pipes, polyethylene pipes, stainless steel pipes, and lining steel pipes, and the structure of the adapter is all different for each of them. .

It goes without saying that the adapter used for the joint part of the water distribution pipe of the present invention is adapted to be applicable to any type of water distribution pipe.

[0060]

[Effect of the invention]

 As described above, according to the present invention, the number of parts can be reduced as compared with the conventional joint part, the structure can be simplified, the assembling time and cost can be reduced, and the impact and torsion can be reduced. There is no danger of loosening or detachment even if it is subjected to such effects, and effects such as high reliability can be obtained.

[Brief description of the drawings]

FIG. 1 is an assembled view of a water pipe for water supply with a partial cross section and a joint part attached to the water pipe according to the embodiment of the present invention.

FIG. 2 is a cross-sectional view of the joint according to the embodiment.

FIG. 3 is a view sequentially showing an assembling work of the joint portion according to the embodiment;

FIG. 4 is an exploded view of a part of a joint part of a conventional water distribution pipe.

FIG. 5 is a cross-sectional view of a conventional joint part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st water pipe, 2 ... 2nd water pipe, 6 ... sealing member, 3 ... sleeve, 4 ... adapter, 5 ... ring body, 13 ... fitting recessed part, 18 ... positioning recessed part, 15 ... slope part .

Claims (4)

[Utility model registration claims] 1. A joint part of a water supply pipe connecting a first water pipe and a second water pipe via a sealing member, a sleeve attached to an end of the first water pipe, An adapter attached to an end of the second water pipe, a ring interposed between the sleeve and the adapter, for connecting the sleeve and the adapter, preventing the detachment, and allowing rotation of the sleeve and the adapter; A joint part of a water distribution pipe characterized by having a body. 2. A fitting recess is provided along an outer peripheral surface of the sleeve, and a positioning recess is provided along an inner peripheral surface of the adapter and opposed to the fitting recess of the sleeve. 2. The joint part of a water supply pipe for water supply according to claim 1, wherein the joint has a circular or elliptical cross section and is rotatably fitted over the positioning concave portion and the fitting concave portion. 3. An end surface of the adapter is provided with a slanted portion which projects obliquely from an inner diameter side to an outer diameter side, wherein the ring body is fitted into a fitting recess of the sleeve, and the outer diameter of the sleeve is adjusted. 3. An elastic force which is formed to have an outer diameter protruding from the surface and has an elastic force which can be suppressed in the fitting concave portion by the slope portion by inserting the tip of the adapter into the end portion of the sleeve.
The joint part of the water distribution pipe described. 4. The ring body has a restoring force at a position where the fitting concave portion of the adapter faces the positioning concave portion of the sleeve, and the restoring force expands over the fitting concave portion and the positioning concave portion. The joint of the water distribution pipe according to claim 3.