JP2000213680A - Branch saddle with snap tap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch saddle with a snap tap structured not to cause water leakage and relative rotation only by mechanically connecting a heat fused saddle and a valve to each other. SOLUTION: This is a branch saddle with a snap tap having a heat fused saddle 11 which can be heat-fused on a distributing water pipe and a valve 12 with a branching port installed on a heat fused saddle branch pipe, one of the heat fused saddle branch pipe and a valve connecting pipe is inserted in the inside of the other, the heat fused saddle branch pipe is fixed on the valve connecting pipe 13 by expanding it or contracting its diameter, an irregularity 115 is provided in the circumferential direction at a part facing against an inner surface near an end part of the other pipe on a pipe outer peripheral surface on the inserted side of the heat fused saddle branch pipe and the valve connecting pipe 13, and an irregularity 135 to fit in the aforementioned irregularity 115 is provided on an end part inner surface of the other pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch saddle with a water tap which is used to divide water from a water distribution pipe such as a water supply pipe and to provide a water supply pipe at a place where water is used such as at home. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-sink type branch saddle with a water faucet attached to a water distribution pipe made of a thermoplastic resin pipe by electric fusion or heat fusion.

[0002]

2. Description of the Related Art In the field of city gas, polyethylene pipes have been widely used as underground pipes. A buried pipe is branched into a place where gas is used, such as a home, by using an electrofusion saddle to branch the drawing pipe and perform drawing.

In the field of water supply, a pipe made of a thermoplastic resin such as polyethylene resin is being used as a water distribution pipe, and an electric fusion type is used to draw a water supply pipe from this water distribution pipe to a place where water is used. For example, branching has been performed with a branch saddle with a water-sealing faucet. As shown in FIGS. 9 and 10, the branch heat fusion saddle with a water faucet is used. Here, FIG. 9 is a front view, and FIG. 10 is a cross-sectional view. Reference numeral 31 denotes a heat-fused saddle into which a branch port valve (water stopcock) 32 is screwed. The heat welding saddle 31 is made of the same material as the water pipe to be connected, and its saddle portion 311 has the same curvature as the outer circumference of the water pipe, and can be attached to the outer circumference thereof. In the case of the electric fusion type, a heating wire is embedded near the inner surface of the saddle portion 311 connected to the water distribution pipe, so that the electric heating wire is electrically fused to the outer peripheral surface of the water distribution pipe. The valve 32 with a branch port is made of a copper alloy such as BC6C, and has a water pipe outlet 321 for attaching a water pipe. The drilling hole is closed by a cap 34 or the like.

[0004] The valve 32 with a branch port has a connection port 322.
Is screwed into a connection tube 33 made of a copper alloy. Since the heat-fusing saddle 31 is made of a thermoplastic resin, it is usual that the connection pipe 33 is put inside and cast-in during injection molding. Several annular grooves are provided on the outer surface of the connection pipe 33 to increase the contact area of the heat-fused saddle 31 with the inner surface of the branch pipe 312 to prevent water leakage from the space and prevent the heat fusion saddle 31 from coming off. I have. Since an annular groove alone is not enough to prevent water leakage, an O-ring 331 is inserted into one of the annular grooves.

[0005]

When the O-ring 331 is fitted in the connecting pipe 33 and the heat-fused saddle 31 is injection-molded, the O-ring 331 is exposed to the melting temperature of the resin at the time of molding and has a high pressure. Is added, the O-ring may be deformed, and in some cases, may be deteriorated. For this reason, the O-ring may be displaced from a predetermined place, and water leakage may occur.

A valve 32 with a branch port is connected to a connecting pipe 33.
When connecting the feed pipe to the feed pipe outlet 321, the connection pipe 33 may be rotated with respect to the branch pipe 312 due to a moment acting to rotate the connection pipe 33. . In view of this, it has also been performed to provide a detent protrusion or an opening that prevents the resin from entering during the molding in the annular groove on the outer periphery of the connection pipe. However, the detents and openings tend to lead to water leakage, which is not a good connection for preventing water leakage. Since the connection between the branch pipe 312 of the heat fusion saddle 31 and the connection pipe 33 is inadequate as described above, a drawing ring is further attached to the outer circumference of the branch pipe 312 and tightened.

However, each of these connections requires an O-ring, a drawing ring, and the like, which increases the number of parts, and requires not only cast-in but also diameter reduction.

Accordingly, an object of the present invention is to provide a branch saddle with a water faucet having a structure that does not cause water leakage or relative rotation by merely mechanically connecting the heat-fusing saddle to the valve.

Another object of the present invention is to provide a branch saddle with a water faucet having a structure free from assembly errors.

[0010]

SUMMARY OF THE INVENTION A branch saddle with a water tap according to the present invention comprises a heat sealing saddle attached to a water distribution pipe by heat fusion, and a valve with a branch port attached to the heat fusion saddle branch pipe. In the one having the heat-fused saddle branch pipe and the valve connection pipe, one of them is inserted inside the other, and the heat-fused saddle branch pipe is expanded or reduced in diameter and fixed to the valve connection pipe. Along with the heat-fused saddle branch pipe and the valve connecting pipe, a part of the outer peripheral surface of the inserted pipe facing the inner surface near the end of the other pipe is provided with irregularities in the circumferential direction, The other end of the other tube is provided with an unevenness which fits into the unevenness on the inner surface.

This branch saddle with a water faucet has at least one annular groove provided on the inner peripheral surface of the valve connecting pipe, and a heat-fused saddle branch pipe is inserted into the valve connecting pipe to form a heat-fused saddle branch. The pipe is expanded and fixed at least at a position corresponding to the annular groove, and irregularities are provided in the circumferential direction on the outer peripheral surface of the heat-fused saddle branch pipe facing the inner surface near the end of the valve connection pipe. The valve connection pipe may be provided with an unevenness on the inner surface of an end portion thereof so as to fit into the unevenness.

In the branch saddle with a water faucet, at least one annular groove is provided on the outer peripheral surface of the valve connecting pipe, and the valve connecting pipe is inserted into the heat-fused saddle branch pipe. A draw ring is extrapolated to the outer periphery of the saddle branch pipe, and the heat-fused saddle branch pipe is reduced in diameter and fixed at least at a position corresponding to the annular groove, and near the end of the heat-fused saddle branch pipe. Unevenness is provided in the circumferential direction on the outer peripheral surface of the valve connection tube facing the inner surface of the heat-sealing saddle branch tube, and unevenness that fits the unevenness can be provided on the inner surface of the end of the heat-fused saddle branch tube.

In the branch saddle with a water tap according to the present invention, it is preferable that the irregularities provided in the circumferential direction are non-uniform in the circumferential direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. 1 to 4 relate to a first embodiment of the present invention. FIG. 1 is a front view showing a branch saddle with a water faucet of the first embodiment, FIG. 2 is a sectional view thereof, and FIG. 4
FIG. 3 is a sectional view taken along line AA of FIG. 2. 5 to 8 relate to a second embodiment of the present invention. FIG. 5 is a front view showing a branch saddle with a water tap of the second embodiment, FIG. 6 is a sectional view thereof, and FIG. FIG. 8 is a sectional view taken along line BB of FIG.

The branch saddle with a water faucet according to the first embodiment of the present invention comprises a heat sealing saddle 11, a valve 12 with a branch port, and a connecting pipe 13 connecting these. The heat-fused saddle 11 includes a saddle portion 111 and a branch pipe 112 integrated thereon. The saddle portion 111 is a saddle portion 311 of the branch saddle with a water tap described above.
Has the same structure as The valve with branch port 12 has a connection port 122 which is screw-connected to the connection pipe 13, a water supply pipe outlet 121 for connecting a water supply pipe, a cap 14 which closes a drilling machine mounting port, and a valve for opening and closing the valve. This structure is the same as that of the valve 32 with the branch port which is provided in the conventional branch saddle with a water tap.

The upper portion of the branch pipe 112 of the heat-fused saddle 11 has a smaller outer diameter, and is inserted into a portion of the connecting pipe 13 having a larger inner diameter. In the portion where the inner diameter of the connection pipe 13 is large, several annular grooves 134 are provided on the inner peripheral surface thereof. At the upper part of the branch pipe 112 corresponding to these annular grooves 134, the portion having a smaller outer diameter is expanded by the rubber bulge 4 as shown in FIG.
3 is fixed to a portion where the inside diameter is large. Further, the outer circumference of the branch pipe 112 of the heat fusion saddle 11 is
The portion facing the inner surface near the end of the tube is provided with irregularities 115 in the circumferential direction.
An unevenness 135 that fits into the unevenness 115 is provided. FIG. 4 is a cross-sectional view taken along the line AA of FIG. 2 showing how the irregularities 115 and the irregularities 135 are fitted.

The heat sealing saddle 11 is made of a thermoplastic resin of the same material as the water pipe to be connected, and the connecting pipe 13 and the valve 12 with the branch port are made of a copper alloy. Branch pipe 1
12 with a rubber bulge 4 or the like from the inner diameter of
When the pipe is expanded, the portion of the branch pipe having a smaller diameter is expanded along the inner peripheral surface of the connecting pipe 13 and enters the annular groove 134 provided on the inner peripheral surface. For this reason, the connecting pipe 13 is firmly connected to the branch pipe 112, so that there is no possibility that the connecting pipe 13 will fall out or leak.

Further, since the unevenness 115 of the outer circumference of the branch pipe and the unevenness 135 of the connection pipe are fitted, even if a rotational moment acts on the connection pipe 13, it does not rotate with respect to the branch pipe 112. It is desirable to make the unevenness 115 non-uniform in the circumferential direction. In this case, since the connecting pipe 13 can be assembled only in a predetermined direction of the heat-fused saddle 11, no assembly error occurs. I have.

The branch saddle with a water tap according to the second embodiment of the present invention comprises a heat sealing saddle 21, a valve 22 with a branch port, and a connecting pipe 23 connecting these. The heat-fused saddle 21 includes a saddle portion 211 and a branch pipe 212 provided thereon. The saddle portion 211 is the saddle portion 31 which has been described in the conventional branch saddle with a water tap.
It has the same structure as 1. The branch valve 22 has a connection port 222 which is screw-connected to the connection pipe 23, a water supply pipe outlet 221 for connecting a water supply pipe, a cap 24 closing the drilling machine mounting port, and a valve for opening and closing the valve. This structure is the same as that of the valve 32 with a branch port which is provided in a conventional branch saddle with a water faucet.

The upper part of the branch pipe 212 of the heat-fusing saddle 21 has an enlarged inner diameter, and the connecting pipe 23 is inserted therein. In the portion where the connection pipe 23 is inserted, several annular grooves 234 are provided on the outer peripheral surface thereof. As shown in FIG. 6, an aperture ring 25 is fitted around the outer circumference of the branch pipe 212 corresponding to these annular grooves 234, and is reduced in diameter and fixed to the connection pipe 23. A lock nut 26 is attached to a screw attached to the connection pipe 23 so that the drawing ring 25 does not come off.
Is tightened. Further, the outer periphery of the connection pipe 23 is provided with irregularities 235 in a circumferential direction at a portion facing the inner peripheral surface near the pipe end of the branch pipe 212, and these are formed on the inner surface of the end of the branch pipe. 21 that fit into the irregularities 235 of
5 are provided. These irregularities 235 and irregularities 215
8 is a sectional view taken along the line BB in FIG.
Is shown in

Also in this case, the heat-fusing saddle 21 is made of a thermoplastic resin, and has a connecting pipe 23 and a valve 22 with a branch port.
Is made of copper alloy. When the diameter of the branch pipe 212 is reduced by extrapolating the drawing ring 25 on the outer circumference of the branch pipe 212, the diameter of the branch pipe is reduced along the outer peripheral surface of the connecting pipe 23 so that the branch pipe enters the annular groove 234 provided on the outer peripheral surface. become. Also in this case, the connection pipe 23 is firmly connected to the branch pipe 212, so that the connection pipe 23 does not come off or leak.

Further, since the unevenness 235 on the outer circumference of the connecting pipe and the unevenness 215 of the branch pipe are fitted, even if a rotational moment acts on the connecting pipe 23, it does not rotate with respect to the branch pipe 212. It is desirable to make the unevenness 235 non-uniform in the circumferential direction. In this case, since the connecting pipe 23 can be assembled only in the predetermined direction of the heat-fused saddle 21, no assembly error occurs.

[0023]

As described above in detail, the branch saddle with a water faucet of the present invention not only prevents disconnection and water leakage but also causes relative rotation by merely mechanically connecting the heat sealing saddle and the valve. It was possible to have a structure without any problems. In addition, since the valve can be assembled only in a predetermined direction with respect to the saddle at the time of assembling, the structure has no erroneous assembly.

[Brief description of the drawings]

FIG. 1 is a front view showing a branch saddle with a water tap according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a branch saddle with a water tap according to the first embodiment of the present invention.

FIG. 3 is an exploded sectional view of a branch saddle with a water tap according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

FIG. 5 is a front view showing a branch saddle with a water tap according to a second embodiment of the present invention.

FIG. 6 is a sectional view of a branch saddle with a water tap according to a second embodiment of the present invention.

FIG. 7 is an exploded sectional view of a branch saddle with a water tap according to a second embodiment of the present invention.

FIG. 8 is a sectional view taken along line BB of FIG. 6;

FIG. 9 is a front view showing a conventional branch saddle with a water tap.

FIG. 10 is a sectional view of a conventional branch saddle with a water tap.

[Explanation of symbols]

11, 21, 31 Heat-fused saddle 111, 211, 311 Saddle part 112, 212, 312 Branch pipe 115, 235 Irregularity 12, 22, 32 Valve with branch port 121, 221, 321 Water supply pipe outlet 122, 222, 322 Connection port 123, 223 Stem 13, 23, 33 Connection pipe 134, 234 Annular groove 135, 215 Roughness 14, 24, 34 Cap 25 Squeeze ring 26 Lock nut 331 O-ring 4 Rubber bulge

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Ken Kato 2 Daifuku, Kuwana-shi, Mie Hitachi Metals Co., Ltd. Kuwana Plant (72) Inventor Nobuo Katsube 2 Daifuku, Kuwana-shi, Mie Hitachi Metals, Ltd. Kuwana F-term in the factory (reference) 3H019 AA04 BA04 BB02 FA14 GA02

Claims (4)

[Claims] 1. A branch liner with a water tap having a valve with a branch port attached to a branch line of a heat fusion saddle attached to a water distribution tube by heat fusion, and a branch line of a heat fusion saddle tube. And one of the valve connecting pipes is inserted inside the other, and the heat-fused saddle branch pipe is fixed to the valve connecting pipe by expanding or reducing the diameter thereof. Irregularities are provided in the circumferential direction at a portion of the outer peripheral surface of the valve connecting tube facing the inner surface near the end of the other tube of the inserted valve connecting tube, and the inner surface at the end of the other tube is A branch saddle with a water faucet, characterized by being provided with irregularities that fit into the irregularities. 2. An at least one annular groove is provided on an inner peripheral surface of the valve connecting pipe, and a heat-fused saddle branch pipe is inserted into the valve connecting pipe, and the heat-fused saddle branch pipe is inserted into at least the annular groove. While being expanded and fixed at the corresponding position, the outer peripheral surface of the heat-fused saddle branch pipe facing the inner surface near the end of the valve connection pipe is provided with irregularities in the circumferential direction,
The branch saddle with a water faucet according to claim 1, wherein a projection and a depression that fits into the projections and depressions are provided on an inner surface of an end of the valve connection pipe. 3. An at least one annular groove is provided on the outer peripheral surface of the valve connecting pipe, and the valve connecting pipe is inserted into the heat-fused saddle branch pipe. The heat-fused saddle branch pipe is reduced in diameter and fixed at least at a position corresponding to the annular groove, and is opposed to the inner surface near the end of the heat-fused saddle branch pipe. Irregularities are provided in the circumferential direction on the outer peripheral surface of the connection pipe,
The branch saddle with a water faucet according to claim 1, characterized in that the heat-fused saddle branch pipe is provided with a projection and a depression that fits into the irregularities on the inner surface at the end. 4. The unevenness provided in the circumferential direction is non-uniform in the circumferential direction.
The branch saddle with a water tap according to any one of the above.