JP2001289383A - City water pipe joint with water shut-off device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a city water pipe joint offering small and compact construction in a general-purpose single product for connecting a washing machine hose. SOLUTION: A through-hole 14 is made in a pipe joint body 1 having a threaded portion 9 at the upstream side, a spigot portion 15 at the downstream side and a locking ball groove 17 at the center. The city water pipe joint IA having a poppet valve 3 seated on or separated from a valve seat 12A provided on the way of the through-hole 14 in fitting a compression coil spring 4 through a valve stem 7 of the poppet valve 3 for carrying the poppet valve 3 to be seated. The spring constant of the compression coil spring 4 is decreased to be smaller and the valve stem 7 is formed in a hollow cut-out shape with its free end at the downstream side for assuring a flow rate and small and compact construction in a single product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pipe joint having a water cutoff device, and more particularly to a pipe joint for connecting a hose for a washing machine to a valve connected to a water pipe.

[0002]

2. Description of the Related Art A number of proposals have been made on pipe joints provided with a fluid shutoff device (for example, Showa 62).
Year, issued by the Japan Institute of Invention, see "Pipes and Pipe Joints from a Patent Perspective" and Japanese Patent No. 2623443).

For example, a pipe joint 50A having a typical fluid shut-off device disclosed in Japanese Utility Model Publication No. 55-34391 will be described. When the downstream pipe body 51 is separated from the upstream joint body 50 in FIG. A poppet valve (in which the valve rod is formed in a plate shape) 52 provided in the middle of the coil spring (compression coil spring, that is, a coil spring in which a load acts to compress the spring) 53 By closing the valve, the fluid (gas) from the upstream joint body 50 is shut off. That is, the pipe joint 50A is provided with a fluid shutoff device.

[0004] More specifically, a threaded portion of a pipe joint body 54 is screwed on the downstream side (secondary side) of the upstream joint body 50, and the pipe joint body 54 and the upstream joint body 50 are screwed. Is provided between them, and a bulge portion of the poppet valve 52 is seated on the valve seat 55.

[0005] Therefore, a coil spring 53 having the upstream side surface of the bulge portion of the poppet valve 52 as one of spring supports.
Are stretched and elastically pressed to support the seating of the poppet valve 52.

A plurality of lock balls 56 are provided around the pipe joint body 54, and a sleeve 57 for operating these lock balls 56 is externally fitted.

Therefore, according to the pipe joint 50A provided with such a fluid shut-off device, first, the sleeve 57 is gripped and slid to the upstream side against the elasticity of the sleeve spring 58. Hold.

Next, the downstream pipe 51 is attached to the pipe joint body 54.
Of the poppet valve 52 is pushed by hand while releasing the lock ball 56 to the periphery.
Is moved to the upstream side, the bulk of the poppet valve 52 seated on the valve seat 55 is separated from the valve seat 55, and the valve is opened.

Then, when the grasped sleeve 57 is released, the sleeve 57 is returned by the sleeve spring 58, and the downstream tube 51 is locked by the lock ball 56. As a result, the upstream joint 50 and the downstream pipe 51 communicate with each other.

Next, a pipe joint 30A using the basic concept of the pipe joint 51A provided with such a fluid shutoff device is applied between the washing machine hose 31 and the water supply valve (47). An apparatus for preventing water discharge due to unexpected detachment of the washing machine hose 31 will be described.

In FIG. 3, when the downstream tube (housing for washing machine) 31 is inadvertently removed from the upstream joint (elbow for faucet body) 30, a synthetic resin (intermediate between them) is provided. AB
The poppet valve 32 (made by S) is immediately closed by the elasticity of the coil spring 33 to shut off the tap water from the upstream joint body 30. That is, this pipe joint 30
A is equipped with a water cutoff device.

More specifically, a threaded portion of a pipe joint body 34 is screwed on the downstream side of the upstream joint body 30, and a valve seat (not shown) is provided substantially at the center upstream of the pipe joint body 34. ), And an O-ring (seal ring) 35 fitted to this valve seat at a position slightly downstream of the bulky portion of the poppet valve 32.
Is seated and closed.

Therefore, the poppet valve 32 is seated by the extension and resilience of the coil spring 33 having the upstream surface of the bulky portion of the poppet valve 32 as a spring receiver.

On the other hand, at the tip of the washing machine hose 31,
A synthetic resin joint collar (receiving port) 36 having a synthetic resin (made of ABS) sleeve 37 externally fitted thereto is fixed, and a plurality of lock balls (not shown,
4 (see FIG. 4).

When the sleeve 37 is slid to the downstream side against the elasticity of a sleeve spring (not shown, see FIG. 4), these lock balls are moved to the side of the sleeve 37. Relieved from radial pressure.

Therefore, while holding the sleeve 37 and sliding it to the downstream side, the joint collar 36
To the downstream spigot 38 integrally formed with the pipe joint body 54.
When these lock balls are fitted on the outer periphery of the lock ball groove 40 provided in the spigot portion 38,
When the sleeve 37 is released from the hand, a sleeve spring (not shown)
Then, these lock balls are pressed from the outer periphery and pushed into the lock ball grooves 40.

Accordingly, the washing machine hose 31 and the pipe joint main body 34 can be connected to each other, and will not come off unless the sleeve 37 is slid to the downstream side.

Therefore, in the pipe joint 30A used for the washing machine hose 31, the lock ball is provided on the joint collar 36 of the washing machine hose 31, but as in FIG. It can be detachably connected.

More specifically, in the pipe joint 30A, first, the sleeve 37 is gripped and slid to the downstream side against the elasticity of a sleeve spring (not shown). 36 is fitted to the spigot 38 and pushed in until it comes into contact with a flange 41 provided around the center of the pipe joint body 34.

At this time, the tip end of the valve rod 39 of the poppet valve 32 is pressed by the pushing force of the reduced diameter step (not shown, see FIG. 4) of the joint collar 36 to move the poppet valve 32 to the upstream side. . As a result, the O-ring 35 of the poppet valve 32 sitting on the valve seat (not shown) opens away from the valve seat. As a result, the hose 31 for the washing machine and the pipe joint body 34 communicate with each other.

Here, in order to move the valve stem 39 of the poppet valve 32 of the pipe joint 30A to the upstream side against the elasticity of extension of the coil spring 33 by the reduced diameter step (not shown) of the joint collar 36. In addition, the following poppet valve guide 42 made of synthetic resin (made of ABS), which makes the diameter-reduced step portion sufficiently contactable and moves the poppet valve 32, is interposed in particular.

That is, the poppet valve guide 42 is
A through hole 44 is provided at the center, and the diameter reducing shaft 43 of the valve rod 39 of the poppet valve 32 is inserted into the through hole 44. Further, a cross blade 45 (guide protrusion) is formed integrally with the poppet valve guide 42 radially, and a water passage is formed by the space between the cross blades 45, so that the hose 31 for the washing machine is formed.
To secure the flow rate.

In FIG. 3, reference numeral 46 denotes a cap nut provided on the elbow (upstream joint 30), and the cap nut 46 is used to attach an elbow (3) to a wall-facing faucet (angle-type water stop valve) 47.
0) is detachably screwed. Numeral 48 designates a hook integrally formed with the synthetic resin sleeve 37. The hook 48 is detachably engaged with the flange 41 of the pipe joint body 34 by resin elasticity, so that the hose 31 for the washing machine can be fixed. Prevents unintended detachment.

[0024]

However, in the pipe joint 30A provided with such a water cutoff device, the poppet valve 3 is provided.
2 and the poppet valve guide 42 are formed separately, so that there is a problem that a C ring is also required and the number of parts is increased.

Therefore, attention has been paid to the fact that both the poppet valve 32 and the poppet valve guide 42 are made of a synthetic resin, and a pipe joint in which the poppet valve 32 and the poppet valve guide 42 are integrally formed has been proposed. Since the upstream side of the poppet valve is used as one spring receiver and the outer periphery of the open end of the water passage of the upstream joint body is used as the other spring receiver, tap water flows in the coil spring.

Therefore, when the coils of the coil spring are pressed against each other at the time of opening the valve, there is a problem that the flow rate to the hose for the washing machine is obstructed. In particular, there is a problem that the flow rate is hindered by clogging due to aging water scale and the like.

Therefore, the present invention is based on the fact that tap water pressure acts on the closing of a poppet valve in addition to the extension and resilience of a coil spring (compression coil spring made of SUS). The above problem is solved by using small spring constants each having a small diameter (smaller than the conventional example in FIG. 3), and by using it for assisting valve closing.

[0028]

Means for Solving the Problems The present invention for that purpose,
1) A valve seat is provided in a through hole that forms a water passage in a pipe joint body having a spout on the downstream side, and the through hole is slid.
And, a poppet valve type water stop stopper having a projection for guiding a through hole and passing water is provided in a valve stem portion extending downstream,
The seal ring of the water stop stopper is seated on the valve seat to close and release the valve, and the seating is performed by tap water pressure and the elasticity of the coil spring, and the separation is fitted to the spout. In a water pipe fitting provided with a water shutoff device performed by a pushing force of a connecting pipe side to be fitted, the coil spring is fitted around an outer periphery of a valve stem portion of the poppet valve type water stop stopper, and the valve stem is fitted. The outer periphery and each step of the through-hole of the pipe joint body are spring receivers, and the valve stem is formed into a hollow notch so that the downstream end is a free end so that water can flow therethrough. A water pipe fitting equipped with a water cutoff device characterized in that the water stopper is shortened in the axial direction to make the whole compact, while easily obstructing the flow rate by being easily set in the closed position. And 2) the above 2. A tapping device according to claim 1, wherein the fitting is connected to an existing tap valve, and the pipe fitted into the spigot is used as a washing machine hose. The gist of the present invention is a water pipe fitting provided with a water cutoff device.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to embodiments shown in the accompanying drawings. FIG. 1 is an overall sectional view of an embodiment of the present invention, in which (A) is a valve open state diagram, (B) is a valve closed state diagram, FIG. 2 is an enlarged view of a main part of FIG. (B) is a view taken in the direction of the arrow A, and (B) is a partially cut-away side view, in which the same or common parts as those of the conventional example, particularly the conventional example shown in FIG. is there.

The water pipe fitting 1A provided with the water cutoff device according to the present embodiment includes a faucet of an existing single faucet, a universal spout of a hot and cold water mixing faucet, an elbow of an angle valve, and the like, and a hose for a washing machine. This is convenient for a pipe joint that detachably connects (inserts and removes) a water pipe and the like. In particular, this water pipe joint 1A can be any type of existing upstream-side joint body (member) 2, Even if the types of screws to be screwed are different (for example, a parallel thread for pipes and a meter screw), it is convenient for a versatile single piece pipe joint that can be used if an adapter is interposed.

1 and 2, a pipe joint 1A includes a pipe joint body 1, a water stop stopper 3 (also referred to as a poppet valve type water stop stopper) serving as a poppet valve (mushroom type valve),
The poppet valve 32 and the poppet valve guide 42 shown in FIG. 3 are formed integrally with each other, and the water stop stopper -3 has a slightly larger valve stem instead of the coil spring 4. Therefore, the number of parts can be reduced and the cost can be reduced. In addition, the axial direction can be shortened to make it compact, and as a result, it is convenient as a single product.

The guide portion 7 of the water stop stopper 3
Since the downstream spring receiver 6 is formed as one of the coil springs 4 of the coil spring 4, the coil spring 4 is set at a position deviated from the water passage 10 and does not hinder the flow rate.

A guide portion (also referred to as a valve stem) 7 serving as a valve stem extending downstream of the water stop stopper 2 is provided with a hollow notch (formed only with a blade) around a central portion on the downstream side. The downstream end is formed solely by a cross-shaped blade (guide projection) 8 having a free end, and the downstream end always projects from the pipe joint body 1. A joint color of a washing machine hose (not shown) is provided on the protrusion (see FIG. 3).
Are made to come into contact with each other.

Therefore, the pipe joint 1A is screwed to an appropriate upstream member (2) such as a water supply valve (for example, an adapter provided at a faucet of a single faucet), and a small-diameter washing pipe is attached to the pipe joint 1A. When the machine hose is inserted and connected in the direction of the white arrow, the water stop stopper 3 opens the valve against the elasticity of the coil spring 4, and communicates with the washing machine. At that time, coil spring 4
Even if these coils are pressed against each other due to shrinkage, a predetermined flow rate can be secured because they are set at positions irrelevant to the water passage.

In particular, since the spring receiver 6 of the coil spring 4 is formed in the valve stem, the coil diameter is reduced, unlike the boss portion, and the spring constant is reduced accordingly, making it easier to press-contact.
The flow rate is not disturbed because it is unrelated to the water channel.

When the hose for the washing machine is inadvertently removed from the pipe joint 1A, the water stop stopper 3 is returned by the elasticity of the coil spring 4 and the tap water pressure, and the water stop stopper 3 is sealed.
The ring (12) sits on the valve seat 12A provided substantially at the center of the through hole that forms the water passage 10 of the pipe joint body 1 and closes the valve, so that water can be shut off.

Therefore, in this water pipe fitting 1A,
It is composed of only five parts (only several parts) of the pipe joint body 1, the water stop stopper-3, the coil spring 4, the O-ring 12, and the packing 11, making it extremely simplistic and rugged to have versatility, and It is what makes it cheap.

Accordingly, this water pipe fitting 1A has a pipe having at least a threaded portion on the water side with a valve at the upstream side, and a lock ball and a water stop stopper contact portion at the tip of the pipe body. It is convenient for connection with the body, and a highly reliable pipe joint 1A can be provided.

Next, the details of the pipe joint 1A will be described. The upstream joint body 2 is formed in a spout shape having a screw 9 engraved on the outer periphery thereof, and a water passage 10 flowing in the center as shown by a black arrow.
Is formed.

The upstream joint 2 may be any member as described above, but it is sufficient if at least a valve is provided on the upstream side at the time of attachment or for long-term non-use. Numeral 11 denotes a packing for sealing the screw 9.

Next, the water stop stopper 3 is made of synthetic resin (A
BS), which is an injection-molded product having a total length of about 30 mm, a diameter of the boss 5 of about 12 mm, a length of the guide 7 of about 28 mm,
Diameter 9 mmφ of the insertion part of coil spring 4 of guide part 7
In particular, since the coil spring 4 is fitted into a part of the outer periphery of the guide portion 7, the coil spring 4
In addition to making the coil diameter small, the pipe joint 1A can be configured to be extremely compact by shortening the axial direction.

The water stop stopper 3 is connected to the poppet valve 32 and the poppet valve guide 4 in the pipe joint 30A shown in FIG.
The water stop stopper 3 is formed integrally with the edge of the upstream end face of the cap portion 5 of the poppet valve of the water stop stopper 3 only by forming a slight tapered tape, but not forming a spring receiver.

Therefore, only the O-ring (seal ring) 12 is fitted to the skirt portion 5 slightly downstream thereof.
It is extremely simplified and the flow is smooth as shown by the black arrow.

The guide portion 7 serving as a valve rod of the water stop stopper 3 is formed with a step by reducing the diameter of the upstream side from about half the axial direction, and forming this step with one of the coil springs 4. The downstream side spring receiver 6 is used. The other upstream spring support 13
The diameter of the through hole 14 through which the water stop stopper 3 of the pipe joint body 1 is slidably inserted is increased to the downstream side to form a stepped portion, which is used as a spring receiver.

The guide portion 7 serving as the valve stem of the water stop stopper 3 is integrally formed with a cross-shaped (may be minus or star-shaped) blade (like an airplane wing) 8 over its entire length. The through hole 14 is guided, a flow rate is secured between the blades 8, and a good contact is made when joining the washing machine hose.

Therefore, a reduced diameter (thinned) solid cruciform blade 8A for forming the spring receiver 6 is formed on the upstream side of the guide portion 7 about half the axial direction to secure the flow rate.
On the downstream side, a cross-shaped blade 8B having an enlarged (thickened) hollow notch is formed to improve the abutment at the time of joining with the washing machine hose, and these are used to secure a flow rate. are doing.

The hollow notched cross-shaped blade 8B has only blades and has a free end at the downstream end around the center, so that the entire blade 8B can be slightly reduced in diameter by utilizing resin elasticity. Accordingly, the coil spring 4 can be easily inserted into the small-diameter through-hole 14 of the pipe joint body 1.
Can be easily set while being fitted to the outside.

Next, the pipe joint body 1 is made of brass (made of metal), that is, a threaded portion on the upstream side and a spigot portion 15 on the downstream side.
And a lock ball groove 17 at substantially the center.
A receiving portion is formed on the upstream side, and a screw 9 is formed on the inner surface, and a spigot portion 15 is formed on the downstream side. A joint collar (see FIG. 3) of a hose for a washing machine is formed. It fits outside.

An outward flange 16 is provided at the center thereof.
The flange 16 serves as an insertion stopper for the joint collar (36), and the hook (48) (see FIG. 3) is locked so that the hose (31) for the washing machine is engaged. ) Does not come off further.

The spout 1 immediately downstream of the flange 16
5 is provided with a lock ball groove 17 for joint color.
A plurality of lock balls (56) (see FIG. 3) are pushed in to prevent the washing machine hose from coming off.

A spigot may be formed on the upstream side of the pipe joint body 1 and a screw may be formed on the outer surface thereof.

[0052]

According to the present invention, when the downstream pipe is fitted and connected to the pipe joint, even if the coils of the coil springs for pressing the water stop stopper come into pressure contact with each other,
In particular, even with a coil spring having a small spring constant by being inserted into the valve stem of the water stop stopper, there is no hindrance to the force because it is an auxiliary return force for tap water pressure. Because it is set off, not only does it not impede the flow rate, it can also shorten the pipe joint in the axial direction and make it compact, and it can also be set as a single unit by always setting it without breaking the coil spring. .

In addition, since the valve rod portion of the poppet valve type stopper is hollow notch and the downstream end is a free end, not only the pipe joint can be made compact, the flow rate can be ensured, but also the coil spring can be stopped. It is possible to satisfactorily set and insert into the stopper.

Further, since this pipe joint is composed of only a few parts, it can be made robust, inexpensive and versatile.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an exploded perspective view of a conventional example.

FIG. 4 is a cross section of another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pipe fitting main body, 3 ... Water stop stopper, 4 ... Coil spring, 6, 13 ... Spring receiver, 7 ... Valve stem part, 9 ... Screw, 1
0: water passage, 12: O-ring, 12A: valve seat, 14: through hole, 15: spout

Claims (2)

[Claims] 1. A valve seat is provided in a through-hole forming a water passage in a pipe joint body having a spout on a downstream side, and the through-hole is slid and penetrated through a valve stem extending to a downstream side. A poppet valve type water stopping stopper having a projection for guiding a hole and allowing water to flow is provided, and a seal ring of the water stopping stopper is seated on the valve seat to close and release the valve. A water supply pipe joint provided with a water cutoff device that performs the separation with the tap water pressure and the elasticity of the coil spring and performs the separation by a pushing force of the connection pipe side fitted to the spout, wherein the coil spring is The poppet valve type water stop stopper is inserted into the outer periphery of the valve stem, and the outer periphery of the valve stem and each stepped portion of the through hole of the pipe joint body are used as spring supports, and the valve stem is formed into a hollow cutout. The downstream end is a free end so that water can flow through the coil spring. The water shutoff device is characterized in that it is easily set at a position deviated from the water passage, thereby obstructing the flow rate and shortening the water stop stopper in the axial direction to make the whole compact. Water pipe fittings. 2. The pipe fitting is connected to an existing tap valve, and a pipe fitting into the spout is used as a washing machine hose, and tap water is discharged by accidental disconnection of the hose. A water pipe joint provided with the water cutoff device according to claim 1 which has been prevented.