JP2667619B2 - Single lever hot water mixer tap - Google Patents

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 / water mixer tap capable of adjusting a mixing ratio and a flow rate of hot water and water by operating a lever, and to prevent a water hammer which is easily generated when water is stopped. The present invention relates to an apparatus configuration that prevents a sudden discharge at the start of water flow.

[0002]

2. Description of the Related Art A single lever type hot / water mixer tap is constructed by superposing two disc-shaped valve plates in a flow path inside a main body.
One of the valve plates is of a fixed type, and the other valve plate is of a movable type connected to an operating lever. The position of the movable-side valve plate with respect to the fixed-side valve plate is changed by a lever, so that the mixing ratio of hot water and water can be set and the flow rate can be adjusted in accordance with the degree of matching of the holes formed in these valve plates. .

[0003] In the operation of moving the valve body by such a lever, when water is stopped after use, the movement of the valve body blocks the flow passage hole formed in the valve body, so that a water hammer is easily generated. . This phenomenon is generally seen in a single lever type hot / water mixer tap.

On the other hand, in order to prevent the occurrence of water hammer, for example, as described in Japanese Utility Model Laid-Open Publication No. 3-33272 and Japanese Patent Laid-Open Publication No. Sho 62-110082, a movable There is a configuration in which a flow path is gently blocked by giving resistance to movement.

In this method, a cylinder chamber is provided in a movable valve plate, and this is communicated with an internal flow passage through a small hole, and a piston incorporated in the cylinder chamber is protruded in the same direction as the movement of the valve body when water is stopped. The piston is provided so that the end face of the 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 water in the cylinder chamber is pushed out. Receiving resistance
The valve can be slowly moved to close the valve slowly.

[0007]

The structure disclosed in the above publication has a structure in which a piston protrudes from a cylinder chamber to the outside of a valve plate, and an end face of the piston faces an 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 of the valve mechanism around the main body, in a type in which the space around the valve plate communicates with the primary side flow path, a pressure difference is applied to the piston. Can not. That is, both the one flowing into the cylinder chamber and the one filling the space outside the cylinder chamber have the pressure of the fluid on the primary side, so even if the valve element moves, the pressure applied to both ends of the piston remains balanced. is there. Therefore, even if the movable valve element moves in the valve opening direction, the piston remains stationary and does not protrude outward.

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.

Further, a resistance mechanism for gently moving the valve body is incorporated in preparation for the occurrence of a water hammer at the time of stopping water. 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, when the lever in the posture set to the high temperature side is operated in the opening direction at the time of stopping the water, the hot water is suddenly bathed or splashed.

The problem to be solved in the present invention is that even if the valve structure is such that the periphery of the valve plate is surrounded by the primary flow path,
An object of the present invention is to prevent the occurrence of water hammer at the time of stopping water and to prevent sudden discharge of hot water or water even at the start of water flow.

[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 which can be connected to the lever and can be moved, the ratio of hot water and water can be set and the flow rate can be set according to the degree of alignment of the holes formed in these valve plates, and the space around the valve plate is set at the water discharge end side. A single-lever type hot and cold water mixing tap connected to a flow path to the movable valve plate and an operating block interposed between the movable valve plate and the lever,
A guide ring is provided around the operation block to guide the operation block in the opening and closing direction of the movable valve plate, and the operation block includes a bore having an open end face facing the direction in which the movable valve plate closes, A piston is provided which can be inserted into and retracted from the bore, and the bore further comprises a small hole for communicating an internal space defined by the piston to the outside, and a projecting end of the piston is restrained by the guide ring. And

A piston is provided between the operating block and the guide ring, the piston being movable substantially coaxially with the closing direction of the movable valve plate, and the piston is housed in one of the operating block and the guide ring so as to be freely retractable. The bore may include a small hole that communicates the interior space defined by the piston to the outside, and may further include a spring in the bore that biases the piston in a direction protruding from the bore.

Further, the operating block is provided with two bores having axes substantially in the same direction as the opening / closing operation direction of the movable valve plate, and these bores are communicated with each other by small holes. Each of the two bores has a piston. And a fluid that can enter and exit the bores on both sides is sealed by a small hole, and the stroke of the piston may be set to a length capable of abutting against the inner wall of the guide ring.

Further, the movable valve plate and the operation block may be molded and incorporated as an integral body.

[0016]

The operation block integrated with the movable valve body is guided by the guide ring and moves in the direction in which the movable valve body opens and closes. When the valve is opened, the piston is restrained by the guide ring, so that the piston comes 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 from the small hole. 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.

Even when a bore is provided in either the operating block or the guide ring, the piston is urged outward by a spring, so that when the valve is opened, the piston moves in a protruding direction, and when the valve is closed, the piston moves forward. The resistance at the time of discharging the mixed water from the small holes and the resistance of the biasing force of the spring itself can be given to the operation block as in the example.

Further, the working ring is provided with two bores, and a piston is incorporated in these bores. The bore and the piston function like a double-acting cylinder by means of a small hole communicating between the bores and the sealed fluid. And if the stroke direction of the piston is adjusted to the moving direction of the movable valve plate so that the piston abuts against the inner wall of the flow path, not only resistance is applied when closing the movable valve body, but also when opening the valve, Resistance works. Therefore, even at the start of water flow, the flow path is opened gently, and rapid water discharge is prevented.

[0019]

1 is a side longitudinal sectional view of a valve cartridge incorporated in a single-lever hot-water mixer tap according to the present invention. FIG. 2 is a front vertical sectional view of a main part showing a connecting structure of a flow path when the valve cartridge is incorporated in a main body of the hot-water mixer tap. FIG.

In the example shown in the drawing, a cartridge type can be incorporated into a main body (not shown) of a hot and cold water mixing tap similarly to the one proposed by the present applicant and published as Japanese Utility Model Publication No. Hei 3-20610. Things.

In the figure, a water supply pipe 51 is provided at a lower end of a hollow cylindrical housing 1 incorporated in a main body 50 of a hot and cold water mixing tap.
And a connection seat 1a for connecting the flow path from the hot water supply pipe 52, respectively. The main body 50 of the hot and cold water mixing tap is made of synthetic resin, and a metal casing 50a is integrated therewith, a flow path in the housing 1 is communicated with the casing 50a, and a water discharge pipe projecting forward from the casing 50a (see FIG. (Not shown).

On the connection seat 1a, a fixed valve plate 2 is fixed at a fixed position by assembling the movable valve plate 3 on the fixed valve plate 2.
Are placed one on top of the other, and the movable valve plate 3 is slidable with respect to the fixed valve plate 2.

An upper outflow hole 1b is opened in the peripheral wall of the housing 1, and a lower outflow hole 1c is opened in the connection seat 1a. The upper outlet hole 1b is provided in the casing 50a of the main body 50 of the hot-water mixer tap.
Used as a flow path to the water discharge pipe provided in the housing 1
The mixed water is discharged into the space between the body and the main body. On the other hand, in the case of a specification in which the water discharge pipe is located below the housing 1, the lower outlet hole 1c of the connection seat 1a is used as an outlet for mixed water, and a pipe is connected thereto.

As described above, the flow direction of the mixed water from the housing 1 can be divided into two systems, and one of the outlet holes is used according to the specification of the main body 50 of the hot and cold water mixing tap, so that one system can be used. The housing 1 can also be used. For example, when using the upper outflow hole 1b, a plug may be fitted and sealed in the lower outflow hole 1c, and in the case of using the lower outflow hole 1c, the upper outflow hole 1b may be closed. In the embodiment, the 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. Things.

As shown in FIG. 2, the fixed valve plate 2 has a water hole 2a and a water hole 2b communicating with a water supply pipe 51 and a hot water supply pipe 52 connected to the connection seat 1a, respectively.
In preparation for the specification of supplying mixed water from c to the water discharge end side, a mixed water outflow hole 2c capable of connecting a flow path to this lower outflow hole 1c is opened. On the other hand, the movable valve plate 3 has a planar shape such that all of the water holes 2a and the hot water holes 2b can be closed or partially opened by moving and turning in the vertical direction in FIG. In the case where the hole 1c is used, a communication hole 3a that can be aligned with the mixed water outflow hole 1c is opened.

FIG. 4 is a plan view when the movable valve plate 3 is overlaid on the fixed valve plate 2.

In the state shown in FIG. 2A, 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 flow paths from the water supply side and the hot water supply side to stop. I'm watering. Then, when the movable valve plate 3 moves upward in the figure in this posture, the water hole 2a and the hot water hole 2c are opened as shown in FIG. Open with the same valve opening. Thus, the flow rate of the mixed water can be set by increasing the amount of the mixed water flowing from the communication hole 3a to the lower outflow hole 1c in accordance with the valve opening, with the ratio of the hot water to the water being 1: 1.

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. When the movable valve plate 3 is rotated clockwise 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 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 is stopped. Return to

The movement of the movable valve plate 3 is operated by the lever 4 protruding from the upper end of the main body 50 of the mixer tap. As shown in FIG. 1, a shifter 5, a guide ring 6, and an operation block 7 are respectively incorporated between the lever 4 and the movable valve plate 3, and the movement of the lever 4 is controlled by the shifter 5 and the operation block. 7 enables transmission to the movable valve plate 3.

FIG. 1 shows a state in which water is stopped, and FIG.
FIG. 5 shows a state in which the movable valve plate 3 is moved to fully open the water side and the hot water side as shown in FIG.

In FIG. 1 and FIG. 5, the shifter 5 is disposed so as to penetrate a cover 1d fixed to the upper end of the housing 1, and has a spherical surface halfway in the axial direction thereof, so that the cover 1d has a spherical joint shape. It is connected. The operating 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 thereof. The lower end of the shifter 5 is connected to the operation block 7 by a spherical joint structure, and causes the operation block 7 to perform a forward-backward movement and a turning operation by a vertical swing operation and a left-right turning operation of the lever 4. .

FIG. 6 is an exploded perspective view of a guide ring 6, an operation block 7, and a piston 8 incorporated in the operation block 7.
7A and 7B are views showing details of the guide ring 6, wherein FIG. 7A is a front view thereof, and 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, a guide ring 6 has a receiving seat 6a for receiving a spherical portion in the middle of the shifter 5 at its upper end, and is coaxial with the receiving seat 6a. A chamber 6b is formed. The chamber 6b has a rectangular opening cross-sectional shape, and its front side is defined by a partition wall 6c provided to be depressed toward the center,
The partition 6c has a slit 6d cut right above the lower end. As shown in FIGS. 7C and 6, a pair of stoppers 6 e for regulating the rotation angle are formed on the peripheral surface on the upper end side of the guide ring 6, and these stoppers 6 e are formed. Is engaged with the cover 1d to prevent rotation during operation.

The operating block 7 has a rectangular cross-sectional shape as shown in FIG. 6 and is large enough to freely move left and right in FIGS. 1 and 5 when it is stored in the chamber 6b. A shifter 5 is provided at the upper end of the operation block 7.
The connecting seat 7a into which the lower end of the
The operation block 7 moves the operation block 7 left and right in FIGS. 1 and 5 and enables the turning operation.

Here, when returning from the open state of FIG. 5 to the closed state of FIG. 1, a resistance mechanism for giving resistance so that the movable valve plate 3 moves slowly is provided by the guide ring 6 and the operating block 7.
Prepare between. This resistance mechanism is constituted by a bore 7b opened in the operation block 7 and a piston 8 which can come out of the bore 7b. And the bore 7b
It has the same opening axis as the moving direction when returning the movable valve plate 3 to its closed position, and has a small hole 7c 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. The piston 8 has a T-shape at the other end thereof, which is inserted into the slit 6d of the guide ring 6 and whose end surface sandwiches the inner surface and the front surface of the partition 6c. In which a restraining portion 8b having a transverse 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 setting of the amount ratio of hot water and water is performed.

At the time of passing 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.
From the mixed water outflow hole 2c via the communication hole 3a through the flow path in the casing 50a around the main body 50.

Here, when shifting from the valve closing state of FIG. 1 to the valve opening state of FIG. 5, the water and hot water from the water holes 2a and the hot water holes 2b fill the housing 1 and the guide pipe 6 The entire operation block 7 is also immersed in the mixed water. Therefore, when shifting to the valve-opening state in FIG. 5, the mixed water flows into the bore 7b from the small hole 7c. On the other hand, since the restricting portion 8b of the piston 8 is engaged with the guide ring 6, the piston 8 is pushed out of the bore 7b, and the valve is kept open.

Here, when the lever 4 is pulled up from the valve open state in FIG. 5 and the valve closing operation is performed, the operation block 7 moves to the right in the figure and moves so as to return the movable valve plate 3 to its water stopping position. On the other hand, since the bore 7b moves in the direction to accommodate the piston 8 with respect to the piston 8 restrained by the guide ring 6, water in the bore 7b is discharged from the small hole 7c.

As described above, 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 is stopped, the movable valve plate 3 is kept gently closed, so that the occurrence of a water hammer in the upstream flow path can be prevented.

The operating block 7 and the movable valve plate 3 may be integrally formed of a 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. Also, the fixed valve plate 2 may be made of the same synthetic resin material. As described above, by integrating the operation block 7 and the movable valve plate 3, the number of parts can be reduced, assembling can be simplified, and downsizing can be achieved.

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 the same reference numerals, and detailed description thereof will be omitted.

The guide ring 6 housed in the housing 1
As in the previous example, there is provided a chamber 6b for holding the operation block 7 so as to be movable in the left-right direction in the figure, and an arrangement in which a piston 9 which can come and go from the bore 7b of the operation block 7 against the inner wall of the chamber 6b. I do.

Unlike the previous example, the piston 9 has a simple cylindrical shape and is urged outward (to the right in the drawing) by a spring 10 incorporated in 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,
The piston 9 can be protruded by the urging force.

Further, the fixed valve plate 2 and the movable valve plate 3 are almost the same as those in the previous example.
It is possible to stop water, mix and open the valve only on the water side.

When the valve is closed as shown in FIG. 8, the operating block 7 is located on the rightmost side of the chamber 6b, and the piston 9 is in contact with the inner wall of the chamber 6b and is submerged 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, the piston 9 is pushed out of the bore 7b by the elastic reaction force of the contracted spring 10, and the mixed water flows into the bore 7b from the small hole 7c.

When the lever 4 is pulled up, the operation block 7
The piston 9 abuts against the inner wall of the guide ring 6, thereby giving resistance to the movement of the operation block 7. 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 part provided with still another resistance mechanism. FIG.
Numeral 1 indicates a valve opening time. In this example,
The same members as those described above are designated by the same 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. This bore 11 has a piston 1
2 and a small hole 11a is opened at one end in the axial direction,
Further, a spring 1 for urging the piston 12 outward.
1b is provided.

Also in this example, when the valve is in the valve-open position shown in FIG. 11, the piston 12 abuts on the operation block 7 by the urging force of the spring 11b and the water pressure of the mixed water in the bore 11. Then, when the valve is closed, the operating block 7 moves to the right along with the movable valve plate 3 in the figure, but receives resistance due to the urging force of the spring 11b and the pressure at which 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 operating 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. A small hole 1 is formed in a partition 13c between the bores 13a and 13b.
3d is opened, and pistons 14a and 14b are incorporated into bores 13a and 13b, respectively. Further, an appropriate fluid is sealed in the bores 13a, 13b whose both ends are closed by the pistons 14a, 14b.
This fluid is passed through the small holes 13d and the bores 13a, 13 on both sides.
b.

In the state shown in the figure, the movable valve plate 3 is at the valve closing position, and at this time, the piston 14a of the right bore 13a abuts against the inner wall of the guide ring 6 and is entirely fitted in the bore 13a. The other piston 14b moves to the left by the pressure of the sealed 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 operation block 7 moves to the left in the figure. However, since the piston 14b is in contact with the guide ring 6, this piston 14b is You 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 at a stretch until it is fully opened, and hot water or water is not discharged from the discharge end with a strong force. Therefore, even when used as a shower or the like, it does not suffer from hot water and can be used safely.

Further, the movable valve body 3 is moved from the valve opening position to the valve closing position.
Is returned, the piston 14a
a. For this reason, similarly to the case of the valve opening operation, the resistance at the time 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.
Can be slowed down, thereby preventing both the occurrence of 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 water hammer from occurring when the valve is closed. And, even when the surroundings of the piston are included in the primary side flow path and the difference in water pressure between the inside and outside of the bore cannot be taken, the piston can be mechanically protruded, and the water can be irrespective of the type of hot water mixer tap. Hammer is prevented.

Further, it is not necessary to open a bore or the like in the movable valve body, a highly water-tight valve structure using a ceramic valve plate is obtained, and it is not necessary to increase the thickness of the valve plate. Compactness is possible.

Further, in the case where pistons are provided in each of the two bores and these are used as resistance mechanisms, not only the valve closing time but also the valve opening speed at the start of water flow can be slowed, so that the valve is suddenly moved from the discharge end. Water is not discharged, and it can be used safely without covering with hot water or splashing water or hot water.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a main part of a cartridge type valve structure used for a single-lever hot-water mixing tap according to the present invention, showing a valve opening state.

FIG. 2 is a front vertical sectional view of a main part showing connection of a water supply pipe and a flow path between a hot water supply pipe and a 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 in which a movable valve plate is overlaid on a fixed valve plate,
(A) of the same figure when the valve is closed, (b) of the same figure when the opening degree of 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 (c) of the figure.

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

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

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) are cross-sectional views taken along line BB and line CC in FIG. (B), respectively.

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

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

FIG. 10 is a longitudinal sectional view showing an example in which a bore and a piston are provided on a guide ring side and when a valve is opened.

FIG. 11 is a longitudinal sectional view of 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]

Reference Signs List 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

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-110082 (JP, A) JP-A-3-33272 (JP, U)

Claims (4)

(57) [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. Movable valve plates, the amount ratio and flow rate of hot water and water can be set according to the degree of alignment of the holes formed in these valve plates, and the space around the valve plate is communicated with a flow path to the water discharge end side. A single-lever hot and cold water mixing tap, wherein an operation block is interposed between the movable valve plate and the lever, and a guide that guides the operation block around the operation block in the opening and closing direction of the movable valve plate. A ring, wherein the actuating block includes a bore having an open end face facing the direction in which the movable valve plate closes, and a piston that is retractable from the bore, and the bore is defined by the piston. Equipped with small holes that communicate the internal space to the outside, A single-lever hot-water mixer tap having a projecting end of the piston 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. Movable valve plates, the amount ratio and flow rate of hot water and water can be set according to the degree of alignment of the holes formed in these valve plates, and the space around the valve plate is communicated with a flow path to the water discharge end side. A single-lever hot and cold water mixing tap, wherein an operation block is interposed between the movable valve plate and the lever, and a guide that guides the operation block around the operation block in the opening and closing direction of the movable valve plate. A ring is provided, and a piston movable substantially coaxially with a valve closing direction of the movable valve plate is disposed between the operation block and the guide ring, and the piston is protruded and retracted in one of the operation block and the guide ring. A bore for freely storing is provided, and the bore is provided in the piston. A single-lever hot-water mixer tap comprising: a small hole for communicating an inner space defined by the space to the outside; and a spring in the bore for urging the piston in a direction protruding from 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 hot / water mixer tap which is a movable valve plate, and in which the amount ratio and flow rate of hot water and water can be set according to the degree of alignment of holes formed in these valve plates, wherein the movable valve plate and the lever An operation block is interposed therebetween, and a guide ring is provided around the operation block to guide the operation block in the opening and closing direction of the movable valve plate, and the operation block has substantially the same direction as the opening and closing operation direction of the movable valve plate. And two bores having the axes of are provided and communicated between the bores by small holes. A piston is incorporated in each of the two bores, and the small holes are filled with fluid capable of entering and leaving both side bores. , And the piston stroke A single-lever hot-water mixer tap having a length that allows the workpiece to abut the inner wall of the guide ring. 4. The single-lever hot-water mixer tap according to claim 1, wherein the movable valve plate and the operation block are formed integrally.