JP2000291083A - Faucet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost of a faucet and also to make compact the connecting part of a connecting pipe with a piping terminal fitting. SOLUTION: In regard to a faucet 10 equipped with a connecting pipe 20 which is provided in extension from a faucet main body 12 and also connected to a piping terminal fitting 30 such as a stop valve, a holding part 24 formed integrally out of a member constituting the connecting pipe 20 is provided in the end of the connecting pipe 20, and a check valve 40 installed in a housing is held in the holding part 24. The check valve 40 is regulated as to the movement in the slip-off direction by a regulating part on the piping terminal fitting side. The connecting part 20 has a main body part 22 of small bore and the holding part 24 of large bore which is formed to be swollen in the end of the main body part 22. Besides, a flange part 28 is provided on the outer periphery of the connecting pipe 20 and this flange part 20 is fastened by a nut 36 screwed on an external thread part 38 cut in the side of the piping terminal fitting 30, so as to connect the connecting pipe 20 with the piping terminal fitting 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water tap provided with a connecting pipe extending from a water tap main body and connected to a pipe terminal such as a water stopcock.

[0002]

2. Description of the Related Art Some water taps have a check valve inside to prevent backflow of a fluid such as hot water or water. Conventionally,
Of these hydrants, those which allow sufficient space in the hydrant body have a built-in check valve in the body. On the other hand, in the case of a faucet which cannot take such space sufficiently in the faucet main body, a piping terminal such as a water stopcock provided at a terminal of a water pipe such as a water pipe or a hot water pipe, and a faucet. A joint having a built-in check valve is interposed at a connection portion with a connection pipe extending from the main body.

FIG. 3 illustrates this in detail. A hydrant 100 is inserted into a mounting hole 104 provided in a top plate 102 of a vanity stand, and is fixed by a nut 105. ) Connection pipe 1 connected to 110
12 are provided. Piping terminal 110 of connection pipe 112
The side end is inserted into the joint 114 and the nut 106
, And the joint 114 is fixed to the pipe terminal 110 by a nut 107. Although not shown, a check valve is built in the joint 114. Note that the connection pipe 112 is formed of a material that can be bent by hand, such as a copper pipe, and is connected in a state where the connection pipe 112 is freely bent in accordance with the mounting interval of the piping terminal 110 and is spread at an appropriate interval.

[0004]

In the above-mentioned conventional water faucet, the manufacturing cost is increased due to the necessity of a joint having a complicated structure incorporating a check valve. In addition, the joint not only has a connection portion with the pipe terminal and the connection pipe at both ends, but also has a built-in check valve, so it is difficult to keep the length short. It has to be long. When a joint having a long length is used, a connection portion between the connection pipe and the pipe terminal is increased in size, and a large space is required for a work of connecting both the pipe terminal and the connection pipe.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has an object to reduce the manufacturing cost of a water faucet and to compactly store a connecting portion between a connecting pipe and a pipe terminal. .

[0006]

Means for Solving the Problems In order to solve the above problems, the means adopted by each of the present invention will be described below for each invention.

The water tap according to claim 1 of the present invention is a water tap provided with a connecting pipe extending from a water tap main body and connected to a piping terminal such as a water stopcock. A water tap which is characterized in that a housing portion integrally formed from a member constituting the connection tube is provided at a distal end of the connection tube, and a check valve is housed in the housing portion.

In the present invention, since the check valve is housed in the connection pipe itself, there is no need for a separate joint having a built-in check valve between the connection pipe and the pipe terminal, thereby reducing manufacturing costs. it can. In addition, since a long joint having a built-in check valve is not interposed, the connection portion between the connection pipe and the pipe terminal can be stored compactly.

Here, the check valve is generally composed of a member constituting a valve port, a valve element for opening and closing the valve port, and an urging element for urging the valve element in the direction of the primary side of the valve port to prevent backflow. It has various components such as means. In the present invention, these constituent members may be individually assembled to the housing portion, or a check valve integrated with the constituent members in a desired housing and made into one unit may be assembled to the housing portion.

[0010] The "pipe terminal device" is provided at an end of various pipes from a water supply pipe, a hot water supply pipe, a water purifier, or the like, and widely includes members connected to a water faucet. This includes not only members such as elbows exposed on the mounting surface of the water tap such as a wall surface, but also joints attached thereto.

Further, as the "connection pipe", not only a flexible pipe such as a copper pipe and a flexible hose, but also a rigid socket for supporting a water tap body, such as a rigid socket for connecting a water tap body and a pipe terminal. Is widely included.

A water tap according to a second aspect of the present invention is characterized in that the connecting pipe comprises a small-diameter main body and a large-diameter housing part bulged at the tip of the main body. The hydrant according to claim 1, which is a feature of the present invention.

In the case of a faucet main body such as the faucet shown in FIG.
The connecting pipe must be narrowed, and it is difficult to secure a sufficient space for accommodating the check valve with such a thin connecting pipe.

Therefore, in the present invention, by providing a large-diameter housing portion at the tip of the small-diameter main body, the connection pipe can be attached to the faucet main body without any trouble by the small-diameter main body. For the accommodation of the check valve, a sufficient space can be ensured by the large-diameter accommodation portion. The large-diameter housing portion can be formed integrally with the distal end of the small-diameter main portion by bulging the distal end of a copper pipe or the like, which is a raw material of the connection pipe, by bulging or the like.

According to a third aspect of the present invention, there is provided a water faucet, wherein the connection pipe has a flange portion on an outer peripheral surface, and the flange portion is screwed to a male screw portion engraved on a pipe terminal. The water tap according to claim 1 or 2, wherein the connection pipe and the pipe terminal are connected by being locked by the nut.

In the present invention, the connection pipe can be simply and securely connected and fixed to the pipe terminal by a nut for locking the flange of the connection pipe, a so-called cap nut. The flange is preferably provided at the distal end of the connection pipe, since a seal member such as a packing can be interposed between the end surface of the pipe terminal and the end surface of the flange to easily perform a seal connection. However, the present invention is not limited to this. In this case, the seal between the connecting pipe and the pipe terminal is provided by providing a sealing member between the outer peripheral surface of the connecting pipe and the inner peripheral surface of the pipe terminal, or by connecting a nut to the connecting pipe by sealing and connecting the pipe. Appropriate means such as sealing connection of a nut to the terminal device may be adopted.

According to a fourth aspect of the present invention, there is provided a water tap according to any one of the first to third aspects, wherein the check valve comprises a housing and a valve mechanism incorporated in the housing. Water tap according to any of the above.

If the various members constituting the check valve are individually assembled to the housing portion, not only the assembling work is complicated, but also a low rigidity such as a copper tube which can be bent manually by hand as a connecting tube. When the member is employed, the function of the check valve may be impaired due to deformation of the connection pipe itself. Therefore, in the present invention, the check valve is a so-called check valve unit having a built-in valve mechanism in the housing, so that the strength of the check valve unit is secured by the housing, and the check valve functions reliably as a check valve. It was.

According to a fifth aspect of the present invention, there is provided a water faucet, wherein the check valve is inserted from the distal end side of the housing portion, and the movement in the pull-out direction is regulated by the regulating portion on the pipe terminal device side. The hydrant according to claim 4, which is characterized in that:

As described above, the check valve is a check valve unit having a housing. When such a check valve is inserted from the distal end of the housing, the check valve is prevented from falling out of the housing. Must be prevented. Here, if it is attempted to provide a retaining ring or the like with a retaining ring or the like on the inner peripheral surface of the housing portion, it is necessary to provide a mounting groove or the like for the retaining ring in the housing portion itself, and the shape of the housing portion becomes complicated. It becomes difficult to integrally form the part from the connecting pipe. Therefore, in the present invention, the piping terminal equipment side different from the member constituting the connection pipe, such as a piping terminal equipment which is a member separate from the connection pipe or an interposition such as packing between the connection pipe and the piping terminal equipment. Further, a restricting portion is provided for restricting the movement in the pull-out direction by contacting the check valve, and the restricting portion prevents the check valve from falling out of the storage portion.

[0021]

FIG. 1 shows a single lever type water tap 10 to which each of the first to fifth aspects of the present invention is applied. The water faucet 10 discharges hot water from a water outlet 16 by adjusting a mixing amount and a water discharging amount of the hot water by a lever 14 attached to an upper part of the water faucet body 12. Water tap 10
Is installed on a top plate 1 of a counter of a vanity stand (not shown), a mounting portion 18 at a lower end of the hydrant body 12 is inserted into a mounting hole 2 formed in the top plate 1, and a nut 105 is The top plate 1 is screwed from the lower side of the plate 1 to the mounting portion 18, and is fixed by holding the top plate 1.

From the lower end surface of the mounting portion 18, two hot water side and water side
The connecting pipes 20, 20 are extended. A copper pipe is used for the connection pipe 20, and a water supply pipe and a hot water supply pipe (not shown) are used.
At the time of construction, it is configured such that a worker can bend it by hand and adjust it to an appropriate interval in accordance with the piping terminal tools 30, 30 provided at the end portion of the container and arranged at various intervals.

A housing portion 24 is provided at the end of the connection pipe 20, and a check valve 40 is housed in the housing portion 24. Here, the check valve 40 is configured as a so-called check valve unit having a housing and a valve mechanism built in the housing. The check valve 40 is a known one having a valve port, a valve element for opening and closing the valve port, and an urging means for urging the valve element in the direction of the primary side of the valve port in a housing, The details are omitted.

The connecting pipe 20 is formed with a small-diameter main body 22 having an inner diameter smaller than that of the housing of the check valve 40, and bulges out at the tip of the main body 22. It is configured to have a large-diameter storage section 24, and the inner diameter of the storage section 24 is naturally larger than the housing of the check valve 40.

Next, the accommodation section 24 will be described with reference to FIG. The accommodating portion 24 is formed integrally with the main portion 22 by bulging the tip of a copper tube, which is a raw material of the connection tube 20, and is formed by using a bulge process, a flange process, or the like. A check valve 40 in which a seal member 42 such as an O-ring is attached to the outer periphery of the housing in the accommodation portion 24.
Is housed. The housing portion 24 has a stepped portion 2 between itself and the main body portion 22 formed with an inner diameter smaller than the outer diameter of the check valve 40.
When the check valve 40 is housed, the check valve 40 comes into contact with the stepped portion 26, so that the check valve 40 is prevented from further moving in the main body portion 24 direction. I have.

Further, according to the third aspect of the present invention, the storage portion 24
A flange 28 is provided around the tip of the. A nut 30 locked to the flange 28 is screwed to a male screw 38 engraved on the pipe terminal 30 with a sealing member 32 such as a packing closely contacting the end surface of the flange 28 interposed therebetween. As a result, the connection pipe 20 and the pipe terminal 30 are connected and fixed. Here, the male screw portion 3 of the pipe terminal device 30
The inner diameter of the tip 8 is smaller than the outer diameter of the check valve 40, and the tip constitutes a restricting portion 34 according to the present invention. After the connection pipe 20 and the pipe terminal 30 are connected and fixed, the restricting portion 34 abuts against the lower end of the housing of the check valve 40, thereby preventing the check valve 40 from coming out of the housing portion 24. . The invention of claim 5 is not limited to this, and the inner diameter of the seal member 32 which is an intervening member between the connection pipe 20 and the pipe terminal 30 is made smaller than the outer diameter of the housing of the check valve 40. Thus, it is also possible to use a member other than the piping terminal 30 to prevent the detachment.

The present invention is not limited to the above embodiments, but can be modified without departing from the spirit of the invention. For example, the present invention is not limited to the single lever type water tap 10 described above, but is also applicable to a two handle type water tap. Further, in the present embodiment, the check valve 40 is prevented from coming off by using the restricting portion 34 of the piping terminal 30. However, the present invention is not limited to this, and is not limited thereto. After the housing 40 is housed in the housing 24, the check valve is fixed by caulking the tip of the housing 24, the check valve 40 is bonded to the housing 24, or another member is attached to the housing 24. The check valve 40 may be fixed to prevent the check valve 40 from coming off.

Further, a straight copper pipe is connected to the connecting pipe 20.
However, the present invention is not limited to this. For example, a spiral pipe having a spiral groove formed in a recess may be used as the connection pipe. Furthermore, although a water stopcock is illustrated as the pipe terminal device 30, the pipe terminal device 30 is not limited to the water stopcock, and may be various members to which the connection pipe 20 can be connected. For example, when the connection pipe 20 and the water stopcock cannot be directly connected, such as when the diameter of the male screw portion of the water stopcock and the diameter of the female screw of the nut 30 are different, a joint is interposed. The joint may be a piping terminal.
Although a joint is required in this example, the check valve 4
No. 0 is accommodated in the accommodating portion 24 of the connection pipe 20, and a check valve is not built in a joint as a piping terminal tool. Therefore, the joint may have a simple cylindrical structure having screw portions at both ends, and such a joint does not significantly increase the manufacturing cost. Further, since the length of the joint itself can be suppressed to be short, the connection portion does not become large.

[0029]

Since each of the present inventions is configured as described above, it is possible to reduce the manufacturing cost of the water faucet and to fit the connecting portion between the connecting pipe and the pipe terminal in a compact manner.

[0030] In particular, according to the invention of claim 2, it is possible to secure a sufficient space for accommodating the check valve without hindering the attachment of the connection pipe to the faucet body. According to the third aspect of the present invention, the connection pipe and the pipe terminal can be easily and securely connected and fixed. According to the fourth aspect of the present invention, the check valve can be easily assembled, and the check valve can be used. According to the invention of claim 5, the strength and function can be ensured, and the check valve housed in the connection pipe can be easily and reliably prevented from coming off.

[Brief description of the drawings]

FIG. 1 is a view showing a water tap according to the present invention.

FIG. 2 is a sectional view showing a main part of the water tap of FIG. 1;

FIG. 3 is a view showing a conventional water tap.

[Explanation of symbols]

1; top plate, 2; mounting hole, 10; hydrant, 12; hydrant body, 14; lever, 16; water outlet, 18;
0; connecting pipe, 22; main body, 24; housing, 26; step, 28; flange, 30; piping terminal, 32; sealing member, 34; regulating part, 36; nut, 38; , 4
0; check valve, 42; seal member, 100;
2; top plate, 104; mounting holes, 105, 106, 107;
Nut, 108; hydrant body, 110; plumbing terminal (water stopcock), 112; connecting pipe, 114; joint.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noriwa Kama 308 Kurono, Gifu City F-term in Caveike Co., Ltd. (Reference) 2D060 AA01 AC03

Claims (5)

[Claims] 1. A water tap provided with a connection pipe extending from a water tap main body and connected to a piping terminal such as a water stopcock, wherein a connection pipe is formed at a tip of the connection pipe. A water tap according to claim 1, wherein a housing portion integrally formed from a member is provided, and a check valve is housed in said housing portion. 2. The water tap according to claim 1, wherein the connecting pipe includes a small-diameter main body and a large-diameter accommodating section bulged at the end of the main body. 3. The connecting pipe has a flange on an outer peripheral surface, and the flange is
The connection between the connection pipe and the pipe terminal is made by being locked by a nut screwed into a male screw section engraved on the pipe terminal. The hydrant described in 1. 4. The water tap according to claim 1, wherein the check valve comprises a housing and a valve mechanism built in the housing. 5. The water tap according to claim 4, wherein the check valve is inserted from the front end side of the housing portion, and the movement in the pull-out direction is regulated by the regulating portion on the piping terminal device side. .