JPH09144916A - Branch fitting for water faucet provided with switching function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily inform a user of the fact that the setting flow rate on a water faucet side is too much when a device is used by discharge of fluid, by providing a pressure alarm valve for communicating a passage with the outside in response to the rise in passage internal pressure at the time that the flow rate exceeds the upper limit of the required flow rate to a supplying part. SOLUTION: When the setting flow rate of mixed water on combination taps side becomes larger than the flow rate to be consumed by a device, a rubber ring of a constant flow valve 11 is contracted to throttle a passage, and pressure of an internal passage between a main body of combination taps and the constant flow valve 11 is raised. A coil spring 12f of a pressure alarm valve 12 is contracted and deformed by receiving pressure of the internal passage. Therefore, a valve shaft 12d is lowered, and a packing 12g is separated from a valve seat 2c around a through hole 2b. As a result, mixed water in the internal passage of a main body 2 is allowed to flow into a chamber 2a and discharged from a small hole 12c to the outside. Therefore, the rise in pressure in the internal passage can be informed by discharge of mixed water from the pressure alarm valve 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is, for example, attached to the tip of a water discharge pipe of a hot and cold water mixing tap to discharge the mixed water to a water supply point equipped with the hot and cold water mixing tap and to supply the mixed water to another device. The present invention relates to a tap metal fitting having a switching function to be used.

[0002]

2. Description of the Related Art For example, a hot and cold water mixing tap provided in a sink is
Conventionally, a single water discharge pipe facing a sink is generally used.

On the other hand, recently, branching metal fittings and the like are incorporated in the body of a hot and cold water mixing tap so that mixed water having a temperature suitable for the application can be supplied to auxiliary equipment such as water purifiers and automatic dishwashers. As a result, the functions have been expanded. Also, instead of incorporating the branch metal fitting into the body of the hot and cold water mixing tap, by providing a branch metal fitting with a switching function at the tip of the water discharge pipe, it is possible to install with the simplest structure and in addition to the existing hot and cold water mixing tap. Can also be easily installed.

When such a branch fitting is provided, the supply flow rate of the accessory equipment may be restricted depending on the operation and purpose of use of the accessory equipment. Therefore, the equipment itself is provided with a throttle valve or the like for keeping the flow rate below the upper limit value. Alternatively, a constant flow valve is provided downstream of the switching valve in the flow path toward the equipment.

For example, when the sauna equipment is used as an auxiliary device, since the mixed water is sprayed in a mist state in the sauna, the temperature of the mixed water is set high, whereas the flow rate of the mixed water supplied is Not many. Therefore, in case the flow rate set by the handle of the main body of the hot and cold water mixing valve is too large, the flow rate is regulated by incorporating a constant flow valve so that the excess amount of mixed water is not supplied to the sauna equipment. . Further, instead of such a constant flow valve, the purpose itself is the same when a valve for suppressing the flow rate of the mixed water to the upper limit value is provided in the sauna equipment itself.

[0006]

However, when the flow rate is set by the hot and cold water mixing valve, it is difficult for a general user to judge whether or not the flow rate is higher than the flow rate required for the supply destination. That is, although it is possible to set a proper flow rate by experience when using it on a daily basis, there is a high possibility that an unfamiliar user will mistakenly set a high flow rate.

On the other hand, as the constant flow valve arranged downstream of the flow path branch portion of the branch fitting, the throttle valve incorporated in the device itself, or the like, a simple one is used in which the upper limit is regulated so that the flow rate does not exceed the required value. . For this reason, if the valve is operated on the side of the hot and cold water mixing valve so that the flow rate becomes higher than the flow rate required at the supply destination, the supply destination will only be sent the mixed water at the upper limit flow rate, but no trouble will occur. The internal pressure of the flow path increases on the upstream side of the constant flow valve and the throttle valve on the device side. Therefore, the seal of the flow path having the water outlet end on the side of the branch fitting and the sink from the hot and cold water mixing plug cannot be maintained, resulting in water leakage or damage to the member.

In order to eliminate such an accident, there is a possibility of water leakage during use, and therefore, it is one means to call the user's attention to the operation of the hot and cold water mixing tap side. However, in the case of household equipment, it cannot be expected that a general user will pay close attention to the setting of the flow rate, and it is also a big problem that it is left to the decision whether the flow rate setting is appropriate. is there.

As described above, in the case of branching to the supply destination of each mixed water by the branch fitting, especially when the flow rate of the mixed water used at the supply destination is regulated, the flow rate adjustment on the hot and cold water mixing tap side is appropriate. Unless it is set, it is inevitable that the internal pressure of the flow path rises.

The problem to be solved by the present invention is to make it possible to easily confirm an increase in the internal pressure of a flow passage, which is likely to occur in a branch fitting having a flow passage switching function, especially when the required flow rate at the switching destination is regulated to be small. This is to prevent water leakage and damage to members.

[0011]

The present invention is connected to the discharge end of a water faucet, branches the flow path from the discharge end into at least two, and switches the flow path to each of these branched flow paths. A branch metal fitting for a faucet equipped with a possible switching valve, which is a pressure warning valve for communicating the flow passage to the outside in response to a rise in the pressure in the flow passage when the upper limit of the required flow rate to the supply destination is exceeded. It is characterized by comprising.

Further, at least one of the branched flow paths is provided with a constant flow valve for controlling the upper limit flow rate to the supply destination, and a pressure warning valve is provided in the branch flow path between the switching valve and the constant flow valve, The pressure warning valve may be configured as a mechanism for communicating the branch flow passage with the outside in response to an increase in the pressure in the flow passage when the upper limit flow rate regulated by the constant flow valve is exceeded.

In such a structure, the pressure warning valve is
A through hole opened in the flow path wall of the branch flow path, a valve body that closes this through hole from the outside and is operable in the valve opening direction by receiving the internal pressure of the branch flow path, and closing this valve body. It may be constituted by elastic means for urging in the valve direction. Also,
The pressure warning valve may be equipped with an atomizing mechanism that atomizes and discharges the fluid from the branch flow path to the outside.

A constant flow valve may be provided inside the main body of the branch fitting.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION There is an upper limit value peculiar to each of the devices connected to a branch flow path branched from a branch fitting, and the flow rate set on the faucet side is the upper limit value. When the value is larger than the value, the pressure in the internal flow path from the branch fitting to the device increases. Therefore, if the pressure warning valve is configured to open in response to an increase in internal pressure when the maximum required flow path consumed by the equipment is exceeded,
A fluid corresponding to an excess flow rate that exceeds the flow rate that can be supplied to the device side is discharged from the pressure warning valve to the outside, and the user can confirm that the flow rate setting on the faucet side is not appropriate by this discharge.

Further, when the upper limit flow rate used in the device connected to the branch flow path branched from the branch fitting is regulated, the constant flow valve provided in this branch flow path is configured to regulate the upper limit flow rate. In that case, even if the flow rate set on the faucet side is large, the required amount of water or mixed water with hot water is supplied to the equipment. On the other hand, on the upstream side of the constant flow valve, there is an upper limit to the flow rate per unit time passing through the constant flow valve, so the pressure in the internal flow path rises. Therefore, if the pressure warning valve is configured to open in response to an increase in internal pressure when the flow rate exceeds the regulation flow rate by the constant flow rate valve, it corresponds to an extra flow rate that exceeds the flow rate that can be supplied to the equipment side. The fluid is discharged from the pressure warning valve to the outside, and the user can confirm by this discharge that the flow rate setting on the faucet side is not appropriate.

As the pressure warning valve, when the valve body for closing the through hole opened in the branch flow passage from the outside is biased by the elastic means, the internal pressure of the branch flow passage received by the valve body and the biasing force of the elastic means. By appropriately setting the above relationship, the valve body can be opened to discharge the fluid from the branch flow path to the outside when the regulated flow rate by the constant flow rate valve is exceeded.

Further, in the case where the pressure warning valve is provided with the atomization mechanism, the discharged fluid becomes a mist, so that even if hot water is supplied from a faucet, for example, the discharged fluid Since the temperature of will immediately drop, there will be no danger in use.

Further, if a constant flow valve having a structure for restricting the maximum flow rate to the supply destination is incorporated in the main body of the branch fitting, for example, when connecting the main body and the equipment with a hose or the like, this hose is used. The pressure load on the is also reduced.

[0020]

1 is a schematic view showing an example in which a branch fitting having a switching function of the present invention is connected to a water discharge pipe of a hot and cold water mixing tap.

In the figure, the main body 51 of the single lever type hot and cold water mixing tap connects the water leg pipe 51a and the hot water leg pipe 51b, respectively, as in the conventional structure, and is connected to the built-in valve mechanism to connect the water. A lever handle 52 capable of setting a mixing ratio and a flow rate of hot water and hot water is provided. And the body 5
At the tip of the discharge pipe 53 protruding from 1, the discharge pipe 5
3 is attached with a branch metal fitting 1 for switching the discharge passage of 3 to an extended passage as it is and a passage of a system different from this passage.

In the illustrated example, a hose 54 is attached to the end of the switching passage of the branch fitting 1, and the hose 54 is connected to the terminal device 55. As this equipment 55,
For example, it can be a water purifier, an automatic dishwasher, or the like, or a facility such as a home sauna that supplies high-temperature hot water at a small flow rate.

FIG. 2 is a vertical sectional view of the branch fitting 1 cut along a plane including the center of connection with the discharge pipe 53.

The branch fitting 1 has a connector 3 for connecting the discharge pipe 53 in a watertight manner to the upper end of its main body 2, and a discharge port 4 is provided on the lower end side downstream of this connector 3 and at the left end. Is equipped with a socket 5 connected to the hose 54. Then, in the flow path from the connector 3 toward the discharge port 4 and the socket 5, the discharge port 4 side and the socket 5
A valve seat 6 for switching the flow path is disposed on the side, and a valve body 7 that is seated on the valve seat 6 and slides and rotates is provided.

The connector 3 has a female screw 3a formed on the upper end side for being screwed into a connecting cylinder having a male screw formed on the outer periphery of a heat insulating cap which is often used for a hot and cold water mixing faucet. The main body 2 is incorporated so as to be rotatable about its axis. For this reason, cutout openings 2e are formed in the lateral direction on the outer peripheral surface of the connection cylinder 2d provided at the upper end of the main body 2 at two locations facing each other.
A substantially horseshoe-shaped ring 3b protruding from e to the inside of the connecting tube 2d is externally fitted around the connecting tube 2d. By fitting the ring 3b into the engaging groove 3c provided on the outer periphery of the connector 3, the connector 3 is restrained in the axial direction of the connection tube 2d to prevent the connector 3 from coming off, and at the same time, the connector 3d is removed. 3 can be rotatably attached to the main body 2. A cover 3d is integrally attached to the connector 3.

With such a connector 3 mounting structure, the main body 2 (or the cover 20 described later) is held in one hand, and the cover 3d is held in the other hand, and the connector 3 is attached to the male screw of the connection pipe of the water discharge pipe. The connector 3 can be easily attached to the water discharge pipe only by rotating the connector 3 so as to screw the female screw 3a.

FIG. 3 is a front view of the valve seat 6 taken along the line AA of FIG. 2, in which a first valve hole 6a communicating with the discharge port 4 side is opened in the lower half as a substantially fan-shaped opening cross section. A second valve hole 6b communicating with the socket 5 side is provided in the upper half with an opening cross section smaller than that of the first valve hole 6a.

The valve body 7 is fixed to the tip of a spindle 8 protruding to the right end of the main body 2, and a handle 9 connected to the spindle 8 is used to rotate the valve body 7 to open either one of the first and second valve holes 6a and 6b. The details are shown in FIG.

The valve body 7 is a disc-shaped member having an opening-shaped valve hole 7a aligned with the first valve hole 6a of the valve seat 6, and is coaxially connected to the spindle 8 by a screw 7b. . On the other hand, at the tip of the spindle 8, a flange 8a having an outer diameter smaller than that of the valve body 7 is provided, and the flange 8a
On the surface where a faces the valve body 7, a spacer 8b is provided which forms a flow path between the valve seat 7 and the seating surface and functions as a partition when switching the flow paths. The spacer 8b is formed on a line segment passing through the center of the flange 8a, and is assembled in a positional relationship with the valve body 7 so as to equally divide the valve hole 7a into two as shown in FIG. 4 (a).

By providing such a spacer 8b, a space is formed between the flange 8a and the valve body 7, and this space is used as a flow path from the valve hole 7a of the valve body 7 to the valve seat 6
The first and second valve holes 6a and 6b can be communicated with each other. Moreover, when the valve body 7 is rotated 90 degrees clockwise or counterclockwise from the posture of FIG. 4A by the handle 9, the valve hole 7a aligned with the second valve hole 6b of the valve body 6 moves to the first position. The valve hole 7a is aligned with the first valve hole 6a side, and the valve hole 7a is aligned with the first valve hole 6a side through a process in which the flow paths on the first and second valve hole 6a, 6b sides are simultaneously communicated. .

The spindle 8 is inserted through a bush 10 fixed to the main body 2 so as to be rotatable and movable in the axial direction, and a compression coil spring 8c is incorporated between the flange 8a and the bush 10. I'm out.
Then, the bush 10 and the handle 9 are cam-joined to each other by the structure shown in FIGS. 5 and 6.

FIG. 5A is a bottom view of the handle 9 in the posture shown in FIG. 2. The handle 9 is provided at one end and the spindle 8 is provided at the other end as shown in FIG. It has a sleeve 9c which is inserted and fixed by a screw 9b. The bush 1 is the end surface of the sleeve 9c.
On the surface facing 0, the cam surface 9d having the shape shown in FIG.
Is formed. The cam surface 9d has recesses 9e formed at two locations facing each other in the radial direction.

On the other hand, the bush 10 has a cam surface 10b formed around a through hole 10a into which the spindle 8 is inserted. The cam surface 10b has a shape that can be coaxially joined to the cam surface 9d of the handle 9, and two convex portions 10c that fit into the concave portion 9e of the cam surface 9d of the handle 9 are provided at two locations facing each other in the radial direction. Is forming. The posture in which the bush 10 is incorporated into the main body 2 is as shown in FIG. 6A, and the convex portions 10c formed at two locations are arranged in the vertical direction.

Here, in the state of FIG. 2, the valve hole 7 of the valve body 7 is
a is aligned with the second valve hole 6b of the valve seat 6, and the handle 9
The posture shown in (a) of FIG. 5 appears as a bottom view. Therefore, the concave portion 9e of the handle 9 and the convex portion 10c of the bush 10 are in a positional relationship of being aligned with each other, and the coil spring 8c causes the cam surface 9d,
10d are pressed against each other. Then, when the handle 9 is rotated, the cam surface 10b of the fixed bush 10 is rotated.
While the cam surface 9d of the handle 9 follows the concave portion 9e and the convex portion 10c, the convex portion 10c pushes the cam surface 9d outward to move the spindle 8 integrated with the handle 9 to the right in FIG. . Therefore, the handle 9
When the valve body 7 is once separated from the valve seat 6 at the same time as the rotation operation of, and the handle 9 is rotated 180 degrees, the combination of the concave portion 9e and the convex portion 10c is exchanged, and the valve hole 7a is aligned with the first valve hole 6a. , The flow path communicating with the socket 5 side is the discharge port 4
Switch to the side. Then, in this way the handle 9
By performing a 0-degree rotation operation, the flow passages can be sequentially switched to the discharge port 4 side and the socket 5 side.

In FIG. 2, a constant flow valve 11 for adjusting the flow rate of the mixed water toward the device 55 is provided on the upstream side of the socket 5. The constant flow valve 11 has a conventionally well-known structure that includes an annular fixed seat 11a that is coaxially fixed to the internal flow path of the main body 2 and a valve ring 11b that is integrally connected to the fixed seat 11a and faces the upstream side. Is. Then, a plurality of inflow ports 11c are opened in the valve ring 11b, and a large number of protrusions 11d are formed in a portion protruding into the fixed seat 11a, and a rubber ring 11e is arranged around these protrusions 11d. By deforming the rubber ring 11e according to the water pressure on the upstream side, the maximum flow rate on the downstream side can be regulated.

FIG. 7 shows a state where no load is applied to the rubber ring 11e, which corresponds to the case where the pressure on the upstream side in the main body 2 is low. In such an unloaded or low-pressure atmosphere, the rubber ring 11e does not shrink and deform, and
The annular flow path around d is widened greatly. On the other hand, when the pressure on the upstream side increases, as shown in FIG. 8, the rubber ring 11e
Contracts and deforms in the radial direction, and narrows the flow path from the inflow port 11c to the outlet of the fixed seat 11a. And
Since the size of the contraction deformation of the rubber ring 11e is almost proportional to the pressure on the upstream side, the flow passage area is reduced as the pressure rises, and the maximum flow rate can be supplied to the downstream side. Becomes

If such a constant flow valve 11 is provided, when the flow path is switched to the socket 5 side and the amount of the mixed water supplied from the main body 51 of the hot and cold water mixing valve is too large, the constant flow valve 11 is provided. Since the maximum flow rate toward the device 55 is regulated by the above, the internal pressure of the flow path to the socket 5 increases. On the other hand, in order to warn the user of a pressure increase and prompt the user to change the setting of the flow rate by the lever handle 52 of the hot and cold water mixing valve, the pressure warning valve 12 is incorporated upstream of the constant flow rate valve 11.

9A and 9B show the details of the pressure warning valve 12, wherein FIG. 9A is a vertical sectional view thereof, and FIG. 9B is a bottom view thereof.

The pressure warning valve 12 is incorporated by utilizing a chamber 2a provided in the bottom surface of the main body 2 and communicating with an internal flow path through a through hole 2b, and each block 12a is fixed to the lower end of the chamber 2a. The member is held. The block 12a has a hollow cylindrical guide 12 inside.
The guide 12b is provided with a plurality of small holes 12c for communicating the inside of the chamber 2a with the outside. Then, the valve shaft 12d is movably inserted into the guide 12b, and a compression coil spring 12f is interposed between the flange 12e provided on the upper end side of the valve shaft 12d and the block 12a.
A packing 12g provided on the upper surface of 2e is closely attached to the valve seat 2c around the through hole 2b.

The spring constant of the coil spring 12f is such that the upper end of the valve shaft 12d facing the passage from the through hole 2b when the pressure in the internal passage increases due to the restriction of the passage by the constant flow valve 11. And the packing 12g is set so as to be contracted by a pressure load. That is, if the rubber packing 11e of the constant flow valve 11 is set to throttle the flow path when the amount of the mixed water supplied from the hot and cold water mixing tap becomes too large as compared with the flow rate consumed by the device 55, From this point, the pressure in the internal flow path begins to rise. Therefore, the spring constant and the rubber ring 11e of the constant flow valve 11 are set so that the coil spring 12f contracts in response to this pressure increase.
By having a relationship with the elastic deformation amount of, the valve shaft 12d can be moved downward in FIG.

In the above structure, when the handle 9 is operated to align the valve hole 7a of the valve body 7 with the first valve hole 6a of the valve seat 6, the mixed water from the main body 51 of the hot and cold water mixing tap is discharged from the discharge port 4. It can be discharged from a discharge port, and can be discharged toward a sink or the like equipped with this hot and cold water mixing valve.

When the handle 9 is rotated 180 degrees so that the valve hole 7a of the valve body 7 is aligned with the second valve hole 6b, the flow path to the discharge port 4 side is blocked and at the same time the flow to the socket 5 side flows. The path is switched, and the mixed water is supplied to the device 55. At this time, if the flow rate of the mixed water set by the lever handle 52 of the body 51 of the hot and cold water mixing valve is appropriate, the constant flow valve 1
1 maintains the state of FIG. 7 and the mixed water is continuously supplied to the device 55 side without increasing the pressure of the internal flow path of the main body 2.

On the other hand, when the flow rate of the mixed water on the hot and cold water mixing tap side becomes larger than the flow rate consumed by the equipment 55, the rubber ring 11e of the constant flow valve 11 contracts as shown in FIG. The flow passage around the protrusion 11d is narrowed, and as a result, the pressure in the internal flow passage from the main body 51 of the hot and cold water mixing valve to the constant flow valve 11 increases.

On the other hand, the coil spring 12f of the pressure warning valve 12 receives the pressure in the internal flow passage and contracts and deforms,
As a result, the valve shaft 12d descends in FIG. 9A and the packing 12g separates from the valve seat 2c around the through hole 2b. Therefore, the mixed water in the internal flow path of the main body 2 is
And is discharged to the outside through the small holes 12c.

As shown by the alternate long and short dash line in FIG. 2, even when the main body 2 is covered with the cover 20,
If the discharge port 21 is opened immediately below the pressure warning valve 12, the discharged mixed water can be confirmed.

By discharging such mixed water, the user operating the hot and cold water mixing tap can know that the set flow rate is too high. Therefore, the lever handle 52
If you operate to reduce the flow rate by
Due to this, the throttling also becomes smaller and the pressure in the internal flow path also stops. Along with this, the restoring force of the coil spring 12f raises the valve shaft 12d and the packing 12g closes the through hole 2b.

In this way, when the pressure in the internal flow passage of the main body 2 rises, this pressure rise can be known by the discharge of the mixed water from the pressure warning valve 12, and the flow rate setting on the hot and cold water mixing tap side must be reset. The pressure can be reduced with.
Therefore, it is possible to prevent damage or leakage of the members between the main body 51 of the hot and cold water mixing stopper and the branch fitting 1.

FIG. 10 is a vertical cross-sectional view of the main part showing another example of the pressure warning valve.

This example is equipped with an atomizing mechanism for making the mixed water discharged when the pressure in the internal flow passage of the main body 2 rises into a mist,
Even if the mixed water is set on the high temperature side, the person using the hot and cold water mixing tap does not take hot water.

In the figure, the pressure warning valve 13 is provided with a block 13a which is connected to the lower end of the chamber 2a and has a small hole 13b in the center of the lower part thereof, and a male screw piece 13c fixed to the block 13a. A valve shaft 13d, which is connected to the screw piece 13c and has a packing 13e at the upper end, is biased by a coil spring 13f toward the valve seat 2c around the through hole 2b.

The male screw piece 13c is fixed with its lower end separated from the bottom of the block 13a, and has a small spiral groove formed between the screw valley 13c-1 formed on the outer peripheral surface and the inner peripheral wall of the block 13a. It is formed as a flow path to the hole 13b.

When the pressure in the internal flow path of the main body 2 rises, the valve shaft 13d descends, the packing 13e opens the through hole 2b, and high-pressure mixed water flows into the chamber 2c, as in the previous example.
It goes toward the small hole 13b side along the valley 13c-1 of the screw of the male screw piece 13c. At this time, the mixed water is the male screw piece 1
The spiral flow path of 3c causes the centrifugal force to increase along with the centrifugal force, and the small hole 13b formed in the center of the block 13a has a small inner diameter, so that the flow path is narrowed. Mixed water is released.

As described above, if the mixed water is discharged in the form of mist, it is easy for the user to confirm because the spraying range is wide. Also, even when hot mixed water is being supplied from the hot and cold water mixing tap side, the temperature of the discharged mixed water is reduced at once without causing burns or the like when the user bathes it. .

In the above embodiment, the constant flow valve 11 is provided in the branch fitting 1, but as an equipment having the constant flow valve 55a in the equipment 55 as schematically shown in FIG. Good. Even in this case, the maximum flow rate is regulated by the constant flow valve 55a, and when the flow rate is excessive, the internal pressure of the flow path from the constant flow valve 55a to the branch fitting 1 rises.
As in the previous example, it is released to the outside by the pressure warning valve 11.

[0055]

According to the present invention, in equipment in which the maximum flow rate consumed by a device that branches a flow path from a branch fitting and is connected is regulated, the flow rate is set on the faucet side when the device is used. If there is too much, the user can be easily notified by discharging the fluid from the pressure warning valve, and the setting of the flow path on the faucet side can be redone. Therefore, it is possible to suppress the pressure increase in the flow path from the faucet to the main body of the branch fitting, and prevent damage to the members and water leakage.

Further, in the case where the pressure warning valve is constituted by the valve body for closing the through hole opened in the branch passage from the outside and the elastic means for urging the valve body in the valve closing direction, the internal pressure of the branch passage is increased. Since the valve element is opened by the elastic means, it can be compactly incorporated as an extremely simple member.

With a pressure warning valve equipped with an atomizing mechanism, even when hot water is supplied from the faucet side, the hot water discharged becomes a mist and the temperature drops, so it can be used safely. it can.

Further, in the case where the constant flow valve is provided in the main body of the branch fitting, the pressure rise in the pipe connecting the main body and the equipment is eliminated, and, for example, a commonly used inexpensive hose is applied to the pipe. It can be done and the cost is improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example in which a branch fitting of the present invention is connected to a discharge pipe of a hot and cold water mixing stopper.

FIG. 2 is a vertical cross-sectional view of a branch fitting.

FIG. 3 is a front view showing the details of the valve seat at a position taken along the line AA of FIG.

FIG. 4 is a detailed view of the valve body, where (a) of the figure is a front view of the valve body part, (b) of the figure is a longitudinal cross-sectional view of the main part thereof, and (c) of the figure is the main part. FIG. 3 is a schematic exploded perspective view of FIG.

5A and 5B are details of the handle, in which FIG. 5A is a bottom view thereof, and FIG. 5B is a perspective view showing details of a cam surface.

FIG. 6 is a detailed view of the bush, in which (a) of the drawing is a front view as seen from the surface facing the handle, and (b) of the same drawing is a cross-sectional view taken along the line BB of (a) of the drawing. It is a figure.

7A and 7B are details of the constant flow valve, in which FIG. 7A is a vertical cross-sectional view thereof, and FIG. 7B is a cross-sectional view taken along line CC of FIG. 7A.

8A and 8B are diagrams showing a restriction of a constant flow valve due to a pressure increase in an internal flow path, in which FIG. 8A is a longitudinal sectional view thereof, and FIG. 8B is a D- of FIG. 8A. It is sectional drawing by the D line arrow.

9A and 9B are details of the pressure warning valve, where FIG. 9A is a vertical sectional view thereof, and FIG. 9B is a bottom view thereof.

FIG. 10 is a vertical cross-sectional view of a main part showing another embodiment of the pressure warning valve.

[Explanation of symbols]

 1: Branch metal fitting 2: Main body 2a: Chamber 2b: Through hole 2c: Valve seat 3: Connector 4: Discharge port 5: Socket 6: Valve seat 6a: First valve hole 6b: Second valve hole 7: Valve body 7a: Valve hole 8: Spindle 9: Handle 10: Bush 11: Constant flow valve 12: Pressure warning valve 12a: Block 12b: Guide 12c: Small hole 12d: Valve shaft 12f: Coil spring 12g: Packing 13: Pressure warning valve 13a: Block 13b: Small hole 13c: Male screw piece 13d: Valve shaft 13e: Packing 13f: Coil spring 51: Main body 52: Lever handle 53: Discharge pipe 54: Hose 55: Equipment

Claims (5)

[Claims] 1. Water comprising a switching valve which is connected to a discharge end of a water faucet, branches a flow path from the discharge end into at least two, and can switch the flow path to each of the branched flow paths. A branch metal fitting for a plug, which has a switching function including a pressure warning valve for communicating the flow passage to the outside in response to an increase in the pressure in the flow passage when the upper limit of the flow rate to the supply destination is exceeded. Branch metal fittings for faucets. 2. A constant flow valve for regulating an upper limit flow rate to a supply destination is provided in at least one of the branched flow paths, and the pressure warning valve is a branch flow path between the switching valve and the constant flow valve. 2. The pressure warning valve according to claim 1, wherein the pressure warning valve serves as a mechanism for communicating the branch passage with the outside in response to an increase in the pressure in the passage when the upper limit flow rate regulated by the constant flow valve is exceeded. Branch fitting for faucet with switching function. 3. The pressure warning valve comprises: a through hole formed in a flow path wall of the branch flow path; and a through hole that closes the through hole from the outside and receives an internal pressure of the branch flow path in a valve opening direction. The tap fitting having a switching function according to claim 1 or 2, comprising an operable valve element and an elastic means for urging the valve element in the valve closing direction. 4. The water tap branch metal fitting having a switching function according to claim 1, wherein the pressure warning valve includes an atomization mechanism for atomizing and discharging the fluid from the branch flow path to the outside. . 5. The branch fitting for a faucet according to claim 2, wherein the constant flow valve is provided inside the main body of the branch fitting.