JPH06174114A - Single lever mixing valve - Google Patents

Abstract

PURPOSE:To apply resistance to the closing operation of a movable valve, and prevent the occurrence of a water hammer phenomenon at the time of closing the valve or stopping water by providing a piston type resistance mechanism between an operation block integrated with the valve and a guide ring for guiding the block. CONSTITUTION:A lever 4 is pushed down to shift a movable valve plate 3 from a wafer stop position to various positions, and also turned to set a ratio of water and hot water quantities. At the time of service, water and hot water respectively flow from the water port 2a and hot water port 2b of a stationary valve plate 2 to a housing 1, and are delivered from a mixing water outlet 2c via the communication port 3a of the movable valve plate 3. When the lever 4 is pulled up to perform a valve closing operation, an operation block 7 moves right, and the movable valve plate 3 is thereby caused to return to the water stop position. In this case, the bore 7b of the block 7 moves in a direction for housing a piston 8 and, therefore, water in the bore 7 is discharged through a small hole 7c, thereby applying resistance to the block 7. As a result, the movable valve plate 3 gradually closes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-lever type hot and cold water mixing tap capable of adjusting the mixing ratio and flow rate of hot water and water by operating a lever, and prevents a water hammer which tends to occur when water is stopped. The present invention relates to a device configuration that prevents a sudden discharge at the start of water flow.

[0002]

2. Description of the Related Art A single-lever type hot and cold water mixing tap has two disc-shaped valve plates superposed in a flow path inside the main body.
One of the valve plates is of a fixed type and the other valve plate is of a movable type, which is connected to an operating lever. Then, the position of the movable side valve plate with respect to the fixed side valve plate is changed by a lever, and it is possible to set the mixing ratio of hot water and water and adjust the flow rate according to the degree of alignment of the holes formed in these valve plates. .

In the case of the valve body moving operation using such a lever, when the water is stopped after use, the valve hole is cut off by the movement of the valve body, so that a water hammer is likely to occur. . This phenomenon is generally seen in a single lever type hot and cold water mixing tap.

On the other hand, in order to prevent the occurrence of a water hammer, as described in, for example, Japanese Utility Model Laid-Open No. 3-33272 and Japanese Patent Laid-Open No. 62-110082, a movable valve plate is used when water is stopped. There is a configuration in which resistance is given to the movement to gently block the flow path.

This is because a movable valve plate is provided with a cylinder chamber, which is communicated with an internal flow path through a small hole, and a piston incorporated in the cylinder chamber is projected in the same direction as the movement of the valve element when water is stopped. It is provided so that the end surface of this piston abuts the inner wall of the main body.

With this structure, when water is supplied, water is supplied to the cylinder chamber to push out the piston, and when water is stopped, the piston hits the inner wall of the main body when the valve body moves, so that the water in the cylinder chamber is pushed out. Received resistance,
The valve body can be slowly moved to gently close the valve.

[0007]

In the structure disclosed in the above publication, the piston projects from the cylinder chamber to the outside of the valve plate, and the end face of the piston faces the internal space of the main body. Therefore, when the water flows into the cylinder chamber from the internal flow path, the pressure of the water is larger than the air pressure inside the main body, so that the piston can be moved in the protruding direction. Therefore, when the valve plate moves in the valve opening direction, the piston can be operated by utilizing the water pressure, and a member such as a spring is not needed.

However, in order to reduce the outer diameter around the main body of the valve mechanism portion, in the type in which the space around the valve plate communicates with the primary side flow passage, a pressure difference is applied to the piston. I can't. That is, both the fluid flowing into the cylinder chamber and the fluid filling the space outside of it have the pressure of the fluid on the primary side, so the pressure applied to both ends of the piston remains balanced even if the valve body moves. is there. For this reason, even if the valve element on the movable side moves in the valve opening direction, the piston remains stationary and does not project to the outside.

As described above, depending on the type of the valve structure, it may not be possible to move the piston by utilizing water pressure even if the piston is provided on the valve plate.

A resistance mechanism for gently moving the valve element is incorporated in preparation for the occurrence of a water hammer when the water is stopped. For this reason, since there is no function of giving resistance to the movement of the valve element at the beginning of use, the flow path opens at once and hot water or water is rapidly discharged from the discharge end. Therefore, for example, if the lever in the posture set to the high temperature side is operated in the opening direction when the water is stopped, the hot water may be suddenly bathed or splashed.

The problem to be solved in the present invention is to provide a valve structure in which the valve plate is surrounded by the primary side flow path.
This is to prevent the occurrence of a water hammer when the water is stopped and to prevent sudden discharge of hot water or water even at the start of water passage.

[0012]

According to the present invention, two valve plates are superposed in a flow passage, one of the valve plates is a stationary fixed valve plate, and the other valve plate is for operation. A movable valve plate that is movable in connection with the lever, and the amount ratio and flow rate of hot water and water can be set by the degree of alignment of the holes formed in these valve plates. A single lever type hot and cold water mixing valve that communicates with the flow path to, wherein an operating block is interposed between the movable valve plate and the lever,
A guide ring for guiding the operating block in the opening / closing direction of the movable valve plate is provided around the operating block, and the operating block includes a bore having an open end surface that faces the direction in which the movable valve plate closes, A piston that can be retracted from the bore is provided, and further, the bore has a small hole that communicates an internal space defined by the piston with the outside, and the projecting end of the piston is restrained by the guide ring. And

Further, a piston which is movable substantially coaxially with the valve closing direction of the movable valve plate is arranged between the actuation block and the guide ring, and the piston is retractably housed in either one of the actuation block and the guide ring. There is provided a bore, which has a small hole that communicates the interior space defined by the piston with the outside, and may further include a spring for biasing the piston in the direction of protruding from the bore.

Further, the operation block is provided with two bores having an axis line in a direction substantially the same as the opening / closing operation direction of the movable valve plate, and the bores are made to communicate with each other by a small hole, and the pistons are respectively connected to the two bores. May be incorporated, and a fluid that can enter and leave the bores on both sides is enclosed by a small hole, and the stroke of the piston may have a length such that it can abut against the inner wall of the guide ring.

Further, the movable valve plate and the operation block may be integrally molded and incorporated.

[0016]

[Operation] The operation block integrated with the movable valve body moves in the direction in which the movable valve body opens and closes by being guided by the guide ring, and the piston is restrained by the guide ring when the valve is opened, so that the piston may come out of the bore. Then, the operation block moves together with the movable valve body. At this time, the mixed water flows into the bore through the small holes. When the movable valve body moves in the valve closing direction, the bore moves so as to include the piston, and the mixed water in the bore is discharged from the small hole by the piston.
Therefore, the operation block receives the resistance due to the discharge of the mixed water, and when the valve closing operation is performed, the movable valve body can be gently returned to the valve closing position.

Further, even when a bore is provided in either the actuation block or the guide ring, the piston is biased outward by the spring, so that the piston moves in the protruding direction when the valve is opened and the previous one when the valve is closed. Similar to the example, the resistance of discharging the mixed water from the small hole and the resistance of the biasing force of the spring itself can be given to the operating block.

Further, the working ring is provided with two bores, the pistons are incorporated therein, and the bores and the pistons function like a double-acting cylinder due to the small holes for communicating between the bores and the enclosed fluid. If the piston strikes the inner wall of the flow path by aligning the stroke direction of the piston with the moving direction of the movable valve plate, not only the resistance is given when the movable valve body is closed, but also when the valve is opened. Resistance works. Therefore, even at the start of water flow, the flow path is gently opened, and sudden water discharge is prevented.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side vertical cross-sectional view of a valve cartridge incorporated in a single lever hot and cold water mixing valve according to the present invention, and FIG. It is a side view.

In the illustrated example, similar to, for example, the one proposed by the present applicant and published as Japanese Utility Model Publication No. 3-20610, a cartridge type can be incorporated into a main body (not shown) of a hot and cold water mixing valve. It is a thing.

In the figure, a water supply pipe 51 is provided at the lower end of a hollow cylindrical housing 1 incorporated in a body 50 of a hot and cold water mixing valve.
And a connection seat 1a for connecting the flow paths from the hot water supply pipe 52, respectively. The main body 50 of the hot and cold water mixing stopper is made of synthetic resin, a casing 50a made of metal is integrated around the main body 50, the flow path in the housing 1 is communicated with this casing 50a, and a water discharge pipe protruding forward from the casing 50a (Fig. It is assumed that a flow path to (not shown) is formed.

A fixed valve plate 2 is installed in a fixed position and fixed on the connection seat 1a, and a movable valve plate 3 is fixed on the fixed valve plate 2.
Are arranged so that the movable valve plate 3 can slide with respect to the fixed valve plate 2.

An upper outflow hole 1b is formed in the peripheral wall of the housing 1, and a lower outflow hole 1c is formed in the connection seat 1a. The upper outlet hole 1b is the casing 50a of the main body 50 of the hot and cold water mixing tap.
Is used as a flow path to the water discharge pipe provided in the housing 1
Drain the mixed water into the space between the and the body. On the other hand, in the case of the specification that the water discharge pipe is located below the housing 1, the pipe is connected to the lower outlet hole 1c of the connection seat 1a as the mixed water outlet.

As described above, the mixed water can flow down from the housing 1 in two directions, and one of the outlet holes can be used depending on the specifications of the main body 50 of the hot and cold water mixing tap. The housing 1 can also be used. For example, when the upper outflow hole 1b is used, a plug may be fitted into the lower outflow hole 1c for sealing, and if the lower outflow hole 1c is used, the upper outflow hole 1b may be closed. Further, in the embodiment, description will be made assuming that the lower outflow hole 1c of the connection seat 1a is used.

3 (a) and 3 (b) are plan views of the fixed valve plate 2 and the movable valve plate 3, respectively. These valve plates 2 and 3 are made of ceramics as in the conventional example. It is a thing.

As shown in FIG. 2, the fixed valve plate 2 has a water hole 2a and a hot water hole 2b which communicate with the water supply pipe 51 and the hot water supply pipe 52, respectively, which are connected to the connection seat 1a.
In preparation for the specification of supplying the mixed water from c to the water discharge end side, a mixed water outflow hole 2c capable of connecting a flow path is opened to the lower outflow hole 1c. On the other hand, the movable valve plate 3 has a planar shape such that all the water holes 2a and the hot water holes 2b can be closed or partially opened by vertical movement and swiveling motion in the figure, and the lower outflow is in the central part. In order to use the hole 1c, a communication hole 3a that can be aligned with the mixed water outflow hole 1c is opened.

FIG. 4 is a plan view of the movable valve plate 3 superposed on the fixed valve plate 2.

In the state shown in FIG. 1 (a), the movable valve plate 3 covers both the water hole 2a and the hot water hole 2b of the fixed valve plate 2 and shuts off the water supply side and the flow paths from the hot water supply side. It's watering. Then, when the movable valve plate 3 moves upward in the figure in this position, the water hole 2a and the hot water hole 2c open as shown in FIG. Open at the same valve opening. This makes it possible to set the flow rate of the mixed water by increasing the amount of the mixed water flowing from the communication hole 3a to the lower outflow hole 1c with the amount ratio of hot water to water being 1: 1 according to the valve opening degree.

Further, FIG. 4 (c) shows a state in which the movable valve plate 3 at the valve open position in FIG. 4 (b) is rotated counterclockwise around its core. At this time, only the water hole 2a is opened, while the hot water hole 2b is fully closed, and only water is supplied to the water discharge pipe side. Further, when the movable valve plate 3 is rotated in the clockwise direction in the opposite direction, the movable valve body 3 in FIG.
Only the hot water hole 2b is opened.

Further, when the movable valve plate 3 is pulled straight down obliquely to the lower right from the state shown in FIG. 3C, both the water hole 2a and the hot water hole 2b are closed by the movable valve plate 3 and the water stop state is maintained. Return to.

Such movement of the movable valve plate 3 is operated by the lever 4 protruding from the upper end of the body 50 of the hot and cold water mixing valve. Then, as shown in FIG. 1, a shifter 5, a guide ring 6 and an operating block 7 are incorporated between the lever 4 and the movable valve plate 3, respectively, and the movement of the lever 4 is controlled by the shifter 5 and the operating block. 7 and the movable valve plate 3 can be transmitted.

It should be noted that FIG.
FIG. 5 shows a state in which the movable valve plate 3 is moved and the water side and the hot water side are fully opened as shown in (b) of FIG.

In FIGS. 1 and 5, the shifter 5 is arranged so as to pass through a cover 1d fixed to the upper end of the housing 1, and a spherical surface is formed along the axial direction of the shifter 5 to form a spherical joint on the cover 1d. They are connected. The operation block 7 is housed in a guide ring 6 incorporated in the housing 1, and the movable valve plate 3 is integrally connected to the lower end of the guide ring 6. The lower end of the shifter 5 is connected to the actuation block 7 by a spherical joint structure, and the actuation block 7 is caused to perform a forward-backward movement and a turning action by a vertical swinging operation and a lateral swinging operation of the lever 4. .

FIG. 6 is an exploded perspective view of the guide ring 6, the operating block 7 and the piston 8 incorporated in the operating block 7,
7A and 7B are diagrams showing details of the guide ring 6, where FIG. 7A is a front view thereof, and FIG. 7B is A- of FIG.
A vertical cross-sectional view taken along line A, and (c) and (d) of the same figure are cross-sectional views taken along line BB and line CC of FIG.

In FIG. 7, the guide ring 6 has a receiving seat 6a at the upper end thereof for receiving a spherical portion in the middle of the shifter 5, and a lower end and a back opening for accommodating the operation block 7 coaxially with the receiving seat 6a. The chamber 6b is formed. The chamber 6b has a rectangular opening cross-sectional shape, and its front side is partitioned by a partition wall 6c which is recessed toward the center.
The partition wall 6c has a slit 6d cut right above the lower end. Further, as shown in FIGS. 7C and 6, a pair of stoppers 6e for restricting a rotation angle are formed in a step shape on the peripheral surface on the upper end side of the guide ring 6, and these stoppers 6e are formed. Is engaged with the cover 1d to prevent rotation during operation.

As shown in FIG. 6, the operation block 7 has a quadrangular cross-sectional shape, and when it is housed in the chamber 6b, it is large enough to freely move left and right in FIGS. Then, the shifter 5 is provided on the upper end of the operation block 7.
The connecting seat 7a into which the lower end of the
The operation allows the operation block 7 to move to the left and right in FIGS. 1 and 5, and enables the turning motion.

Here, when returning from the valve open state of FIG. 5 to the valve closed state of FIG. 1, a resistance mechanism for giving resistance so that the movable valve plate 3 moves gently is provided with a guide ring 6 and an operating block 7.
Be prepared between This resistance mechanism is composed of a bore 7b opened in the operation block 7 and a piston 8 capable of projecting and retracting from the bore 7b. And the bore 7b is
The movable valve plate 3 has the same opening axis as the moving direction when the movable valve plate 3 is returned to its closed position, and a small hole 7c is opened at one end in the axial direction.

The piston 8 is provided with a packing 8a which is in close contact with the inner peripheral surface of the bore 7b, and the other end of the piston 8 is inserted into the slit 6d of the guide ring 6 and the end surface of which is T-shaped so as to sandwich the inner surface side and the front surface side of the partition wall 6c. The restraint portion 8b having the cross-sectional shape is formed. When the lever 4 is lowered from the valve closed state shown in FIG. 1 to the valve opened state shown in FIG. 5, the operation block 7 moves to the left in conjunction with the tilting operation of the shifter 5, but the piston 8 Since the restraint portion 8b is hooked on the partition wall 6c side, the piston 8 is held without changing its relative position with respect to the guide ring 6.

In the above structure, the movable valve plate 3 can be moved from the water stop position shown in FIG. 4A to various positions by pushing down the lever 4 as shown in FIG. Then, if the turning operation of the lever 4 is combined, the amount ratio of hot water to water is set.

During this passage of water, the water supply pipe 51 and the hot water supply pipe 5
2 and the hot water from the fixed valve plate 2 flow into the housing 1 through the water hole 2a and the hot water hole 2b of the fixed valve plate 2, respectively.
The water is discharged from the water discharge pipe from the mixed water outflow hole 2c through the communication hole 3a through the flow path in the casing 50a around the main body 50.

Here, when the valve closed state of FIG. 1 is changed to the valve opened state of FIG. 5, the housing 1 is filled with water and hot water from the water hole 2a and the hot water hole 2b, and the inside of the guide pipe 6 is filled. The entire working block 7 is also immersed in the mixed water. Therefore, when the valve is opened as shown in FIG. 5, the mixed water flows into the bore 7b through the small hole 7c. On the other hand, since the restraint portion 8b of the piston 8 is engaged with the guide ring 6 side, the piston 8 is pushed out of the bore 7b and the valve open state is maintained.

When the lever 4 is pulled up from the valve open state shown in FIG. 5 and the valve is closed, the operation block 7 moves to the right side in the figure to move the movable valve plate 3 back to its water stop position. On the other hand, since the bore 7b moves in the direction in which the piston 8 is accommodated with respect to the piston 8 which is constrained by the guide ring 6, the water in the bore 7b is discharged from the small hole 7c.

Thus, during the valve closing operation, the bore 7
The water in b is discharged from the small hole 7c, and the resistance at this time can be given to the operation block 7. Therefore, even if the lever 4 is operated, the operation block 7 can gently close the movable valve plate 3 without returning the movable valve plate 3 to its closed position.

As described above, when the water stop operation is performed, the gradual closing of the movable valve plate 3 is maintained, so that the occurrence of a water hammer in the upstream flow passage can be prevented.

The operating block 7 and the movable valve plate 3 may be integrally formed of synthetic resin and incorporated therein. In this case, a relatively hard synthetic resin is used as a material to suppress the degree of wear between the fixed valve plate 2 made of ceramics. The fixed valve plate 2 may also be made of the same synthetic resin material. As described above, by integrally forming the operation block 7 and the movable valve plate 3, the number of parts can be reduced and the assembly can be simplified and downsized.

FIGS. 8 and 9 are longitudinal sectional views of the essential part of an example provided with a resistance mechanism using a spring, showing the time of valve closing and the time of valve opening, respectively. The same members as those in the previous example are designated by common reference numerals, and detailed description thereof will be omitted.

The guide ring 6 housed in the housing 1 is
As in the previous example, a chamber 6b for holding the actuation block 7 movably in the left-right direction in the drawing is provided, and an arrangement is made such that the retractable piston 9 can be abutted from the bore 7b of the actuation block 7 on the inner wall of this chamber 6b. To do.

Unlike the previous example, the piston 9 has a simple cylindrical shape, and is biased outward (to the right in the figure) by a spring 10 incorporated on the side of the small hole 7d. By providing this spring 10, even if there is no pressure difference with respect to the piston 9 located between the inflow of the mixed water into the bore 7b and the mixed water in the chamber 6b,
This piston 9 can be pushed out by the urging force.

Further, the fixed valve plate 2 and the movable valve plate 3 are almost the same as those in the above-mentioned example, and the operation of the lever 4 will cause a change in FIG.
It is possible to stop water, mix and open the valve on the water side as shown in.

Here, when the valve is closed in FIG. 8, the operation block 7 is located on the rightmost side of the chamber 6b, and the piston 9 hits the inner wall of the chamber 6b and is recessed in the bore 7b. Then, when the lever 4 is pushed downward, the operation block 7 moves to the left side in the figure via the shifter 5. Therefore, due to the elastic reaction force of the contracted spring 10, the piston 9 is pushed out in the direction of coming out of the bore 7b, and the mixed water flows into the bore 7b through the small hole 7c.

When the lever 4 is pulled up, the operation block 7
Since the piston 9 of the abuts against the inner wall of the guide ring 6, the movement of the operating block 7 is resisted. This resistance is generated by the urging force of the spring 10 and the water pressure received by the piston 9 when the mixed water accumulated in the bore 7b is discharged from the small hole 7c. Therefore, even if the lever 4 is operated, the operation block 7 can gently close the movable valve plate 3 without returning the movable valve plate 3 to its closed position.

FIGS. 10 and 11 are longitudinal sectional views of a main portion provided with another resistance mechanism. FIG.
1 indicates the time when the valve is open. In this example also,
The same members as those described above are designated by common reference numerals.

The housing 1 has a larger diameter than that of the previous example, and a bore 11 is provided in the guide ring 6 at a position corresponding to the front surface when the operation block 7 is directed in the valve closing direction. In this bore 11, the piston 1 that strikes the operating block 7
2 is provided and a small hole 11a is opened at one end in the axial direction,
Further, a spring 1 for urging the piston 12 toward the outside.
1b is provided.

Also in this example, when the valve is in the open position shown in FIG. 11, the piston 12 abuts the operating block 7 by the urging force of the spring 11b and the water pressure of the mixed water in the bore 11. When the valve closing operation is performed, the operation block 7 moves to the right side in the drawing together with the movable valve plate 3, but it receives resistance due to the urging force of the spring 11b and the pressure when the mixed water in the bore 11 is discharged from the small hole 11a. Therefore, even when the lever 4 is operated in the valve closing direction, the movable valve plate 3 gently moves to close the flow path, and the occurrence of water hammer can be prevented.

Further, FIG. 12 shows an example of a structure in which the flow passage is gently opened not only when the valve is closed but also when the valve is opened to prevent abrupt discharge at the initial stage of water passage.

The operation block 7 has two bores 1 coaxially.
3a and 13b are provided, and their opening axes are oriented in the valve opening / closing operation direction of the movable valve plate 3. The small hole 1 is formed in the partition wall 13c between the bores 13a and 13b.
3d is opened, and pistons 14a and 14b are incorporated in the bores 13a and 13b, respectively. Further, an appropriate fluid is enclosed in the bores 13a and 13b whose both ends are closed by the pistons 14a and 14b,
This fluid is passed through the small hole 13d and the bores 13a, 13
Allow access to b.

In the state shown in the drawing, the movable valve plate 3 is at the valve closing position, and at this time, the piston 14a of the right bore 13a abuts on the inner wall of the guide ring 6 and is entirely fitted in the bore 13a. Then, the other piston 14b moves to the left side by the pressure of the enclosed fluid, and its tip abuts against the inner wall of the guide ring 6.

When the lever 4 is operated to open the valve from this closed state, the operating block 7 tries to move to the left side in the figure, but since the piston 14b is in contact with the guide ring 6, this piston 14b is located in the bore 13b. It will be pushed inside. Therefore, the fluid in the bore 13b is discharged from the small hole 13d to the bore 13a, thereby giving resistance to the operation block 7 and slowly moving in the valve opening direction.

Thus, even if the lever 4 is operated at the start of water flow, the movable valve body 3 can be gently moved to its valve opening position. Therefore, the flow path does not open all at once until it is fully opened, and hot water or water is not discharged from the discharge end with a strong force. Therefore, even when it is used for a shower or the like, it does not suffer from hot water and can be used safely.

Further, the movable valve element 3 is moved from the valve opening position to the valve closing position.
When returning the piston, the piston 14a
It will be in a state of protruding from a. Therefore, similarly to the case of the valve opening operation, the resistance when the operation block 7 returns to the valve closing position can be obtained by the pistons 14a and 14b,
A gentle valve closing operation is possible.

As described above, since the operation block 7 is provided with the two bores 13a and 13b and the pistons 14a and 14b, the movable valve plate 3 can be opened and closed.
The movement of the can be slowed down, and it is possible to prevent both the occurrence of a water hammer and sudden water discharge.

[0062]

According to the present invention, a piston type resistance mechanism is provided between the operation block integrated with the movable valve body and the guide ring for guiding the movable block, so as to provide resistance to the movement of the movable valve body when the valve is closed. Therefore, it is possible to prevent the occurrence of a water hammer when the valve is closed. Even if the piston is of a type that is included in the primary side flow path and the pressure difference between the inside and outside of the bore cannot be maintained, the piston can be mechanically ejected, and the water can be used regardless of the model of the hot and cold water mixing tap. Hammer is prevented.

Since it is not necessary to open a bore or the like in the movable valve body, a highly watertight valve structure using a ceramic valve plate can be obtained, and it is not necessary to increase the thickness of the valve plate. It can be made compact.

Further, when pistons are provided in each of the two bores and these are used as a resistance mechanism, not only the valve closing speed but also the valve opening speed at the start of water passage can be slowed down, so that it can be suddenly increased from the discharge end. It will not be spouted and can be used safely without being exposed to hot water or splashing water or water.

[Brief description of drawings]

FIG. 1 is a diagram showing a vertical cross-sectional view of a main part of a cartridge-type valve structure used in a single-lever hot and cold water mixing valve of the present invention when the valve is opened.

FIG. 2 is a front vertical cross-sectional view of a main part showing the connection of the water supply pipe and the passage between the hot water supply pipe and the valve element.

3A and 3B are schematic views of a valve plate, in which FIG. 3A is a plan view of a fixed valve plate, and FIG. 3B is a plan view of a movable valve plate.

FIG. 4 is a plan view of a movable valve plate superposed on a fixed valve plate,
(A) of the same figure when the valve is closed, (b) of the same figure when the opening degree on the water side and the hot water side are the same, and (c) of the same figure when the water side only is fully opened. (D) of the figure shows the case where the flow path is fully closed from the figure (c).

5 is a vertical cross-sectional view of a main part when the valve element of FIG. 1 is opened.

FIG. 6 is a perspective view showing a guide ring, an operation block and a piston in an exploded manner.

FIG. 7 is a detail of the guide ring, (a) of which is a front view thereof, (b) of which is a vertical sectional view taken along the line AA of (a) of FIG. (C) And (d) is a cross-sectional view taken along line B-B and line C-C of FIG.

FIG. 8 is a vertical cross-sectional view showing an example of a mechanism of pushing a piston outward by a spring and showing a main part when the valve is closed.

9 is a longitudinal sectional view showing a main part when the valve element of FIG. 8 is opened.

FIG. 10 is a vertical cross-sectional view showing an example in which a bore and a piston are provided on the guide ring side and the valve is opened.

11 is a vertical cross-sectional view showing the example of FIG. 10 when the valve is closed.

FIG. 12 is a vertical cross-sectional view of an example in which two bores and a piston are incorporated in an operating ring to apply resistance to a movable valve plate during both valve opening and valve closing processes.

[Explanation of symbols]

1 Housing 10 Spring 2 Fixed Valve Plate 11 Bore 2a Water Hole 11a Small Hole 2b Hot Water Hole 11b Spring 2c Mixed Water Outflow Hole 12 Piston 3 Movable Valve Plate 13a Bore 3a Communication Hole 13b Bore 4 Lever 13c Partition 5 Shifter 13d Small Hole 6 Guide Ring 14a Piston 7 Working Block 14b Piston 7b Bore 50 Main Body 7c Small Hole 51 Water Supply Pipe 8 Piston 52 Hot Water Supply Pipe 8b Restraint 9 Piston

Claims (4)

[Claims] 1. Two valve plates are superposed in the flow path, one of these valve plates is a stationary fixed valve plate, and the other valve plate is movable by connecting to an operating lever. It is a movable valve plate, the amount ratio and flow rate of hot water can be set by the degree of alignment of the holes formed in these valve plates, and the space around the valve plate is communicated with the flow path to the discharge end side. A single-lever-type hot and cold water mixing valve having an operating block interposed between the movable valve plate and the lever, and a guide for guiding the operating block around the operating block in the opening / closing direction of the movable valve plate. The operation block includes a ring, and the operation block includes a bore whose end face is directed toward the direction in which the movable valve plate is closed, and a piston which is retractable from the bore, and the bore is defined by the piston. Equipped with a small hole that connects the internal space to the outside, A single lever hot and cold water mixing stopper in which the protruding end of the piston is restrained by the guide ring. 2. Two valve plates are superposed in the flow path, one of these valve plates is a stationary fixed valve plate, and the other valve plate is movable by connecting to an operating lever. It is a movable valve plate, the amount ratio and flow rate of hot water can be set by the degree of alignment of the holes formed in these valve plates, and the space around the valve plate is communicated with the flow path to the discharge end side. A single-lever-type hot and cold water mixing valve having an operating block interposed between the movable valve plate and the lever, and a guide for guiding the operating block around the operating block in the opening / closing direction of the movable valve plate. A piston is provided between the operating block and the guide ring, the piston being movable substantially coaxially with the valve closing direction of the movable valve plate, and the piston is projected and retracted in either one of the operating block and the guide ring. A bore that can be stored freely is provided, and the bore is attached to the piston. Therefore, a single lever hot and cold water mixing tap having a small hole for communicating the defined internal space to the outside and further having a spring for urging the piston in a direction protruding from the bore in the bore. 3. Two valve plates are superposed in the flow path, one of these valve plates is a stationary fixed valve plate, and the other valve plate is connected to an operating lever and movable. A single-lever-type hot and cold water mixing valve, which is a movable valve plate and in which the amount ratio and flow rate of the hot water and water can be set according to the degree of alignment of the holes formed in these valve plates. An operating block is interposed between the operating block and a guide ring for guiding the operating block in the opening / closing direction of the movable valve plate, and the operating block has substantially the same direction as the opening / closing direction of the movable valve plate. Two bores having an axis of 1 and a small hole communicating between the bores, a piston is incorporated in each of the two bores, and a fluid that can enter and leave the bores on both sides is enclosed by the small holes. , And the piston stroke A single lever hot and cold water mixing tap having a length such that the rake can be abutted against the inner wall of the guide ring. 4. The single lever hot and cold water mixing tap according to claim 1, wherein the movable valve plate and the operation block are integrally formed.