JP3515481B2 - Water pipe fitting with water cut-off device - Google Patents

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, many proposals have been made for a pipe joint provided with a fluid cutoff device (for example, Showa 62).
, "Invention Society's" Pipes and Pipe Joints Seen from Patents "and Japanese Patent No. 2623443).

For example, a pipe joint 50A equipped with 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 (a valve rod in the form of a plate) 52 provided in the middle of the coil immediately extends due to the extension elasticity of a coil spring (compression coil spring, that is, a coil spring of a type in which a load acts so as to compress the spring) 53. The valve is closed to shut off the fluid (gas) from the upstream joint body 50. That is, the pipe joint 50A is provided with a fluid cutoff device.

More specifically, the threaded portion of the 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 together. An elastic pressure valve seat 55 is provided between the valve seat and the valve seat 55, and the bulkhead portion of the poppet valve 52 is seated on the valve seat 55.

Therefore, the coil spring 53 having the upstream side surface of the umbrella portion of the poppet valve 52 as one spring receiver.
Elastically expands and holds the seat of the poppet valve 52.

Further, a plurality of lock balls 56, 56 ... Are provided around the pipe joint main body 54, and a sleeve 57 for actuating these lock balls 56 is externally fitted.

Therefore, according to the pipe joint 50A equipped with such a fluid cut-off device, first, the sleeve 57 is gripped to resist the resilience of the sleeve spring 58, and is slid to the upstream side. Hold.

Then, the pipe body 54 is connected to the downstream pipe 51.
While pushing the lock ball 56 to the surroundings, the pushing portion is pushed by hand, and the pushing force is used to push the plate valve rod 59 of the poppet valve 52.
Is moved to the upstream side, the umbrella portion of the poppet valve 52 seated on the valve seat 55 is separated from the valve seat 55, and the valve is opened.

When the sleeve 57 being gripped is released, the sleeve 57 returns by the sleeve spring 58, and the downstream side tube 51 is locked by the lock ball 56. As a result, the upstream joint body 50 and the downstream pipe body 51 communicate with each other.

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

In FIG. 3, when the downstream pipe body (washing machine hose) 31 is carelessly removed from the upstream side joint body (water faucet body elbow) 30, a synthetic resin (in between) is provided ( AB
The (S) poppet valve 32 is immediately closed by the expansion elasticity of the coil spring 33 to shut off tap water from the upstream joint body 30. That is, this pipe joint 30
A is equipped with a water shutoff device.

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

Therefore, the seating of the poppet valve 32 is carried by the elastic elasticity of the coil spring 33 whose spring surface is the upstream surface of the poppet valve 32.

On the other hand, at the tip of the washing machine hose 31,
A synthetic resin joint collar (receptacle portion) 36 fitted with a synthetic resin (ABS) sleeve 37 is fixed, and a plurality of lock balls (not shown,
(See FIG. 4).

When the sleeve 37 is slid to the downstream side against the resilience of the sleeve spring (not shown, see FIG. 4), these lock balls are locked in the sleeve 37. Freed from radial pressure.

Therefore, the joint color 36 is held while the sleeve 37 is held and slid to the downstream side.
Is formed integrally with the pipe joint body 54.
When they are externally fitted to the lock ball, these lock balls are located on the outer periphery of the lock ball groove 40 provided in the spout portion 38, so
The sleeve spring (not shown) is released when the knob 37 is released from the hand.
Then, these lock balls are pressed from the outer periphery and pushed into the lock ball groove 40.

Therefore, the washing machine hose 31 and the pipe joint main body 34 can be connected to each other, and cannot be removed 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 toward the joint color 36 of the washing machine hose 31, but it can be operated with one touch as in the case of FIG. It can be detachably connected.

Further, in the pipe joint 30A, first, the sleeve 37 is first gripped, slid to the downstream side against the resilience of the sleeve spring (not shown), and then held as it is. 36 is fitted onto the spigot 38 and pushed in until it abuts on the flange 41 provided around the center of the pipe joint body 34.

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

Here, in order to move the valve rod 39 of the poppet valve 32 of the pipe joint 30A to the upstream side against the extension elastic force of the coil spring 33 by the reduced diameter step portion (not shown) of the joint color 36. In particular, the following poppet valve guide 42 made of synthetic resin (made of ABS) that allows the reduced-diameter step portion to sufficiently contact and moves the poppet valve 32 is particularly interposed.

That is, the poppet valve guide 42 is
A through hole 44 is provided at the center, and the reduced diameter shaft 43 of the valve rod 39 of the poppet valve 32 is inserted into the through hole 44. Also, radial cross-shaped blades (guide projections) 45 are integrally formed on the poppet valve guide 42, and a space between the cross-shaped blades 45 forms a water passage to form a washing machine hose 31.
To secure a flow rate to.

In FIG. 3, reference numeral 46 denotes a cap nut provided on the elbow (upstream side joint body 30). The cap nut 46 causes a wall-extending type faucet (angle type stop valve) 47 to be attached to the elbow (3
0) is detachably screwed. Numeral 48 is a hook integrally formed with the synthetic resin sleeve 37. The hook 48 is detachably engaged with the flange 41 of the pipe joint main body 34 by resin elasticity so that the washing machine hose 31 cannot be detached. Prevent further disassembly.

[0024]

However, in the pipe joint 30A equipped with such a water shut-off device, the poppet valve 3
Since the 2 and the poppet valve guide 42 are separately configured, there is a problem that a C ring is also required and the number of parts is increased.

Therefore, it is noted that both the poppet valve 32 and the poppet valve guide 42 are made of synthetic resin, and a pipe joint formed integrally with them is also proposed. However, even in the pipe joint of the proposal, the coil spring is not The upstream side of the poppet valve is used as one spring receiver, and the outer circumference of the open end of the water passage of the upstream joint body is used as the other spring receiver. Therefore, tap water flows in the coil spring.

Therefore, when the coils of the coil spring are pressed against each other when the valve is opened, there is a problem that the flow rate to the washing machine hose is hindered. In particular, there has been a problem that the flow rate is obstructed by clogging due to scale and the like over the years.

Therefore, according to the present invention, since the water pressure acts on the closing of the poppet valve in addition to the expansion elastic force of the coil spring (SUS compression coil spring), the coil average diameter of this coil spring and the diameter of the coil rod. The above problem is solved by using a small spring constant having a small diameter (smaller than that of the conventional example of FIG. 3), and as a result, assisting the valve closing.

[0028]

According to the present invention, there is provided:
1) In a pipe joint body having a threaded portion on the upstream side, a spigot portion on the downstream side, and a lock ball groove in the central portion, a valve seat is provided in a through hole forming a water passage of the pipe joint body. A poppet valve type water stop stopper formed integrally with synthetic resin, which is provided with a blade that slides through the through hole, guides the through hole to the valve rod portion that extends downstream, and has water passage, The seal ring of the water stop stopper is seated on the valve seat to close / separate the valve, and the seating is performed by tap water pressure and the elasticity of a coil spring which is easy to press with a small spring constant, and separates. A pipe joint for a water supply equipped with a water shut-off device that is fitted into the outlet portion and has a lock ball that is pushed into the lock ball groove by a pushing force of a joint color, and the coil spring is A stepped portion formed by reducing the diameter of the valve rod portion and a through hole The stepped portion formed by expanding the diameter is used as a spring receiver, and is fitted and inserted into the outer periphery of the valve rod portion, and a cross-shaped blade is formed over the entire length of the valve rod portion, and the upstream side thereof is the reduced diameter solid. It is easy to insert into the through hole by reducing the diameter of the downstream end by resin elasticity using the hollow notch-shaped expanding blade with the central part on the downstream side and making the downstream end a free end. In addition, while ensuring the flow rate, projecting from the pipe joint main body so that the joint collar abuts well, and easily setting the coil spring at a position out of the water passage, the flow rate is hindered. In the water pipe joint equipped with a water shut-off device, characterized in that the water stop stopper is shortened in the axial direction, and the number of parts is reduced to make the whole compact. 2) Install the pipe joint Connected to water supply valve, e washing machine a tubular body joined to the difference mouth -
The pipe fitting for a water supply equipped with the water shut-off device according to claim 1, wherein tap water is prevented from being discharged by an unexpected disengagement of the hose, and the cross-shaped blade is a minus-shaped or star-shaped blade. Is the gist.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail with reference to the mode of embodiment shown in the accompanying drawings. FIG. 1 is an overall cross-sectional view of an embodiment of the present invention, (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. 1, and (A) is (B) is a view from the direction of arrow A, (B) is a partially cut side view, and the same parts or common parts as those of the conventional example, in particular, the conventional example shown in FIG. 3 are omitted, it is necessary to supplement them. is there.

A water pipe fitting 1A equipped with a water shut-off device according to the present embodiment includes a faucet of an existing single faucet, a free spout of a hot and cold water mixing faucet or an elbow of an angle valve, and a washing machine HO. It is convenient for a pipe joint that is detachably connected (inserted / removed) to / from a pipe or the like, and in particular, this water pipe joint 1A may be any type of existing upstream joint body (member) 2, Even if the types of screws to be screwed are different (for example, pipe parallel thread and meter thread), it is convenient for a versatile single-piece pipe joint that can be used by interposing an adapter.

1 and 2, a pipe joint 1A includes a pipe joint body 1, a water stop stopper (also referred to as a poppet valve type water stop stopper) 3 which is a poppet valve (mushroom valve).
Generally, it is composed of only the coil spring 4, and in particular, the poppet valve 32 and the poppet valve guide 42 shown in FIG. 3 are integrally molded, and instead, a water stopper 3 having a slightly larger valve rod portion is formed. Therefore, the number of parts is reduced and the cost is reduced, and further, the axial direction is shortened to be compact, which is convenient as a single item.

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

A guide portion (also referred to as a valve rod portion) 7, which is a valve rod extending downstream of the water stop stopper-2, has a hollow cutout portion (consisting only of blades) around the central portion on the downstream side. The downstream end is always formed by the cross-shaped blade (guide protrusion) 8 having a free end, and the downstream end always protrudes from the pipe joint body 1. A joint color of a hose for a washing machine (not shown) is provided on the protruding portion (see FIG. 3).
The reduced-diameter stepped portion of is contacted.

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

Particularly, since the spring receiver 6 of the coil spring 4 is formed on the valve rod portion, unlike the bulkhead portion, the coil diameter is made small, and the spring constant is accordingly small, which facilitates pressure contact.
It does not interfere with the flow because it has nothing to do with the water passage.

If the washing machine hose 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 water pressure, and the seal of the water stop stopper-3 is returned.
Since the ruling (12) is seated on the valve seat 12A provided at the substantially center of the through hole forming the water passage 10 of the pipe joint body 1 to close the valve, the water can be shut off.

Therefore, in this water pipe fitting 1A,
The pipe joint body 1, the water stop stopper-3, the coil spring 4, the O-ring 12, and the packing 11 are composed of only 5 parts (only a few parts), and are extremely simple and robust to have versatility, and It is cheap.

Therefore, the water pipe fitting 1A is a pipe having at least a screw portion on the water supply side having a valve on the upstream side, and a lock ball and a water stop stopper contact portion at the tip of the pipe body. It is possible to provide a highly reliable pipe joint 1A that is convenient for connection with the body.

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

The upstream side joint body 2 may be any member as described above, but at least the upstream side joint body 2 may be provided with a valve for mounting or for long-term nonuse. In addition, 11 shows a packing for water sealing with respect to the screw 9.

Next, the water stop stopper-3 is made of synthetic resin (A
(BS) injection-molded product having a total length of about 30 mm, a diameter of the bulky portion 5 of about 12 mmφ, a length of the guide portion 7 of about 28 mm,
Diameter of fitting portion of the coil spring 4 of the guide portion 7 is 9 mmφ
In particular, since the coil spring 4 is fitted in a part of the outer periphery of the guide portion 7, the coil spring 4
The diameter of the coil can be made small and the pipe joint 1A can be shortened in the axial direction to be extremely compact.

The water stop stopper-3 is the poppet valve 32 and the poppet valve guide 4 in the pipe joint 30A shown in FIG.
2 and 1 are integrally formed, and only a slight taper is formed on the edge of the upstream end surface of the umbrella portion 5 of the poppet valve of the water stop stopper-3, and no spring receiver is formed.

Therefore, the O-ring (seal ring) 12 is fitted to the bulky portion 5 on the slightly downstream side thereof.
It is extremely simple and smoothes the flow in the direction of the black arrow.

In the guide portion 7 which is the valve rod of the water stop stopper-3, a step portion is formed by reducing the diameter of the upstream side from about half the axial direction, and this step portion is formed on one side of the coil spring 4. The downstream side spring support 6 is used. The other upstream spring support 13
Has a through hole 14 into which the water stop stopper-3 of the pipe joint body 1 is slidably inserted and which has a stepped portion formed by expanding the diameter toward the downstream side to form a spring receiver.

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

Therefore, a reduced diameter (thinned) solid cross-shaped blade 8A for forming the spring receiver 6 is formed on the upstream side in the axial direction of the guide portion 7 to secure a flow rate,
On the downstream side thereof, a cross-shaped blade 8B having a hollow notch with an enlarged diameter (thickened) is formed to improve the contact with the hose for the washing machine, and the flow rate is secured by these. is doing.

The hollow notched cross-shaped blade 8B is a blade only and has a free end at the downstream end with respect to the central portion. Therefore, the entire blade 8B can be slightly reduced in diameter by utilizing resin elasticity. As a result, it can be easily inserted into the small-diameter through hole 14 of the pipe joint body 1.
Can be set easily.

Next, the pipe joint body 1 is made of brass (made of metal). In short, the threaded portion is on the upstream side and the spigot portion 15 is on the downstream side.
And a lock ball groove 17 approximately in the center, that is,
A socket is formed on the upstream side and a screw 9 is engraved on the inner surface of the socket, and a spigot 15 is formed on the downstream side of the socket to attach a joint color (see FIG. 3) of the washing machine hose. I am trying to fit it outside.

Further, an outward flange 16 is provided at the center thereof.
Is formed integrally or by screwing, and the flange 16 serves as an insertion stopper for the joint color (36), and the hook (48) (see FIG. 3) is locked so that the washing machine hose (31) ) Does not come off further.

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

It is also possible to form a spigot on the upstream side of the pipe joint body 1 and engrave a screw on the outer surface thereof.

[0052]

According to the present invention, when the pipes on the downstream side are fitted and connected to the pipe joint, even if the coils of the coil springs for elastically pressing the water stop stopper come into pressure contact with each other,
In particular, even with a coil spring that has a small spring constant by being inserted into the valve stem portion of the water stop stopper, there is no problem with the lack of force because it is the auxiliary return force of the water pressure. Since it is set separately, not only does it impede the flow rate, but the pipe joint can be shortened in the axial direction to make it compact, and moreover, the coil spring can be set at all times without being separated and can be made into a single item. .

Moreover, since the valve rod portion of the poppet valve type stopper is hollow notched and the downstream end is a free end, not only can the pipe joint be made compact but a sufficient flow rate can be secured, but the coil spring can also be stopped. It is possible to favorably insert and set the stopper.

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

[Brief description of 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 joint main body, 3 ... Water stop stopper-4, Coil spring, 6,13 ... Spring receiver, 7 ... Valve rod part, 9 ... Screw, 1
0 ... Water passage, 12 ... O-ring, 12A ... Valve seat, 14 ... Through hole, 15 ... Spout

Claims (2)

(57) [Claims] 1. A pipe joint body having a threaded portion on the upstream side, a spigot portion on the downstream side, and a lock ball groove in the central portion, and a through hole forming a water passage of the pipe joint body, When Ru provided with a valve seat
Both are provided with a poppet valve type water stop stopper integrally molded with a synthetic resin, which slides through the through hole, and has a vane for guiding the through hole and allowing water to pass through a valve rod portion extending downstream. The seal ring of the water stop stopper is seated on the valve seat to close / separate the valve, and the seating is performed by the water pressure and the elasticity of the coil spring which is easy to press with a small spring constant, and the separation is performed. A pipe joint for a water supply equipped with a water shut-off device which is fitted into the spout part and has a lock ball that is pushed into the lock ball groove by a pushing force of a joint color, wherein the coil spring is Formed by reducing the diameter of the valve stem
The stepped part and the stepped part formed by expanding the through hole are used as spring supports.
Then , fit it on the outer circumference of the valve stem ,
A cruciform blade is formed, and its upstream side is reduced in diameter.
A hollow notch-shaped expansion with the center part on the downstream side.
Diameter blades only, and with the downstream end as the free end,
The through hole by reducing the diameter of the downstream end using resin elasticity
To facilitate insertion, and to secure a flow rate, and to make the joint color satisfactorily abut by projecting from the pipe joint body, and by easily setting the coil spring at a position out of the water passage, In addition to eliminating the obstruction of the flow rate, shorten the water stop stopper in the axial direction and reduce the number of parts.
A water pipe fitting equipped with a water shut-off device characterized by making the whole compact as a saving . 2. The pipe joint is connected to an existing water supply valve, and the pipe body joined to the spout is used as a washing machine hose, and tap water is prevented from being discharged due to unexpected detachment of the hose. You
In addition, the cross-shaped blade is a minus-shaped or star-shaped blade
The pipe joint for water supply provided with the water shutoff device according to claim 1.