JP2001336648A - Valve device and single lever type combination faucet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device and single lever type combination faucet in which no water leakage occurs even if a variation is generated in the water pressure nor drop of the handle lever operating easiness occurs while the specified gap is secured. SOLUTION: The valve device includes a stationary valve element fixed through a packing to a packing guide installed at the bottom of a housing and equipped with a valve hole leading to a flow passage provided in the packing guide and a movable valve element overlapped on the stationary valve element slidably and equipped with a communication chamber leading to the valve hole and performs water stop or regulation of the rate of flow by means of mutual displacement of the stationary and movable valve elements, wherein a packing groove to store packing is formed in either of the packing guide and stationary valve element, while the other is furnished with a plate-form projection making elastic deformation in pursuit after deformation of the packing stored in the packing groove and capable of being inserted between the inner wall surface of the packing groove and the packing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a valve device and a single lever type mixing faucet using the valve device.

[0002]

2. Description of the Related Art A single lever type mixing faucet, which is closed and opened by rotating a single lever up and down and left and right, has recently been frequently used in kitchens, wash basins and the like due to its convenience. A single-lever mixing faucet used for domestic water supply will be described with reference to FIG. FIG. 6 shows a sectional view of a valve device for a three-hole single lever type mixing faucet. In the valve device 1, a fixed valve body 6 and a movable valve body 5 are provided in a housing 4, and the movable valve body 5 is freely slid by a handle lever 9 to be engaged. The handle lever 9 is fixed by the lever shaft 2 and transmits its movement to the movable valve body 5. 3 is a lever holder. The bottom surface of the fixed valve element 6 is fixed to a packing guide 8 via a packing 7. Hot water inflow holes 6a, water inflow holes 6b, and discharge holes 6c are formed in the fixed valve body 6, and the flow paths 8a, 8b formed in the packing guide 8 are formed.
And 8c. Channels 8a, 8b
The hot water and water that have flowed in from the hot water inlet 6a and the water inlet 6
b, the mixture is mixed in the communication chamber 5a of the movable valve body 5, and is discharged from the faucet (not shown) through the discharge hole 6c and the flow path 8c.

[0003] The structure of the packing part is such that the connection port of the faucet body and the connection port of the flow path of the fixed disk plate are fitted in a concave and convex manner, and the outer peripheral surface of the convex connection port and the concave surface are connected. A structure in which a packing is provided between the inner peripheral surface of the connection port and the inner peripheral surface of the connection port (Utility Model Registration No. 2534621). The seal surface of the seal ring storage portion is formed by the annular seal wall surface of the disk valve body and the annular seal wall surface of the disk holding portion. There is a seal structure in which a seal ring is in contact with both wall surfaces, and a seal ring housing portion is tapered from a side receiving water pressure to a side not receiving water pressure (Japanese Patent Application Laid-Open No. Hei 8-21543). However, in the former, the packing is arranged between the peripheral surfaces of the concave and convex fitting portions, so if a valve hole of a sufficient size is to be formed in the fixed disk plate, the fixed disk plate itself has to be enlarged. ,
On the other hand, in order to reduce the size of the fixed disk plate, the valve hole must be reduced. Also, in the latter, since the seal ring accommodating portion is provided in the disk valve body in an annular shape, miniaturization is difficult as in the former.

[0004] For this reason, the valve device shown in FIG. 7 is used as the structure of the packing portion (circular portion M in FIG. 6) that can be further miniaturized. FIG. 7 is a partially enlarged sectional view of the packing structure in FIG. The packing 7 is accommodated in a packing groove 10 provided in a packing guide 8, and the fixed valve body 6 is crimped. A clearance A is formed between the fixed valve body 6 and the packing guide 8 by the protrusion of the packing 7. The clearance A is necessary for maintaining smooth operation by the handle lever 9. If the clearance A disappears, internal components in the housing 4 cause mutual interference, and the operation of the handle lever 9 becomes impossible. There are cases.

[0005]

However, the packing structure shown in FIG. 7 can be downsized with a simple structure, but the following problems occur due to fluctuations in water pressure. FIG. 8 shows a state when the water pressure P is applied from the right side in FIG. 7. FIG. 8 is a view showing a deformed state of the packing 7. When the water pressure P is applied, a phenomenon occurs in which the packing 7 protrudes from the packing groove 10.
(A)). If the clearance A becomes larger due to variations in the dimensions of individual parts of the valve device 1, the amount of protrusion of the packing 7 increases (FIG. 8B), causing damage to the packing 7 or causing the packing 7 to be damaged by a long-term load. May be deformed, and the water stopping performance may be lost. Further, if the fixed valve body 6 protrudes unevenly and deforms, the fixed valve body 6 cannot be held at a normal position, and the operability of the handle lever 9 is reduced. In order to deal with such a problem, as shown in FIG. 9, there is a method of providing a packing groove 10 on the fixed valve body 6 side together with the packing guide 8 and fixing the packing 7 in a sandwich state (FIG. 9A). . In this case as well, since it is essential to provide the clearance A, when the water pressure P is applied, the protrusion phenomenon occurs (FIGS. 9B and 9B).
(C)). As a result, similarly to the above, the deformation of the packing 7 and the operability of the handle lever 9 are reduced.

SUMMARY OF THE INVENTION The present invention has been made to address such a problem, and while maintaining a predetermined clearance, water does not leak even if the water pressure fluctuates, and the operability of the handle lever is reduced. It is an object of the present invention to provide a valve device that does not use the same and a single lever type mixing faucet using the valve device.

[0007]

According to a first aspect of the present invention, there is provided a valve device fixed to a packing guide provided at a bottom portion of a housing via a packing and provided with a valve hole communicating with a flow path of the packing guide. And a movable valve body slidably superimposed on the fixed valve body and having a communication chamber communicating with the valve hole. A packing groove for accommodating packing is provided on one of the valve bodies, and the other can elastically deform following the deformation of the packing accommodated in the packing groove, and between the inner wall surface of the packing groove and the packing. It is characterized in that a plate-shaped convex portion that can be inserted is provided. Further, a single lever type mixing faucet of the present invention is characterized by using the above valve device.

A packing groove is provided in one of the packing guide and the fixed valve body, and the other can elastically deform following the deformation of the packing housed in the packing groove. By providing a plate-like convex portion that can be inserted into the packing, the packing does not protrude from the packing groove at all. Further, the plate-shaped projection provided on the other side of the packing groove is elastically deformed following the deformation of the packing, so that the sealing performance is further improved. As a result, it is possible to increase the critical pressure resistance, which indicates the characteristic that can withstand the water pressure of the water pipe, and no water leakage occurs. In addition,
The valve device according to claim 1 can be applied not only to a single lever type mixing faucet but also to a valve device for a single faucet or a switching valve.

According to a second aspect of the present invention, the valve device is fixed via a packing to a packing guide provided at the bottom of the housing.
The mutual displacement between a fixed valve body having a valve hole communicating with the flow path of the packing guide and a movable valve body slidably superimposed on the fixed valve body and having a communication chamber communicating with the valve hole. In the valve device for stopping water or adjusting the flow rate, the packing guide is provided with a packing groove having a plate-shaped convex portion extending at least one side wall toward the fixed valve body,
The fixed valve body has a concave portion into which the plate-shaped convex portion can be inserted, and at least a surface of the packing housed in the packing groove against which the packing is pressed is polished. Further, a single lever type mixing faucet of the present invention is characterized by using the above valve device.

The packing guide is provided with a packing groove having a plate-shaped protrusion extending at least one side wall toward the fixed valve body, and the fixed valve body has a recess into which the plate-shaped protrusion can be inserted. At the same time, since at least the surface of the packing against which the packing is pressed is polished, the packing is pressed against the polished surface having small surface roughness and high surface accuracy.
As a result, the sealing performance is improved, the critical pressure resistance can be increased, and no water leakage occurs. In addition, by providing a plate-shaped convex portion extending to the fixed valve body only on one side wall, the flow passage area of the valve hole of the fixed valve body and the packing guide can be increased, so that the flow rate can be increased. Claim 2
Can be applied not only to a single lever type mixing faucet, but also to a single faucet and a valve device of a switching valve.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a valve device will be described with reference to FIG. FIG. 1 is a sectional view of a valve device used for a single lever type mixing faucet. In the valve device 1, a fixed valve body 6 and a movable valve body 5 are provided in a housing 4, and the movable valve body 5 is freely slid by a handle lever 9 to be engaged. The handle lever 9 is fixed by the lever shaft 2 and transmits its movement to the movable valve body 5. 3 is a lever holder. The fixed valve element 6 is fixed via a packing 7 to a packing guide 8 provided at the bottom of the housing 4. The movable valve element 5 is slidably superimposed on the fixed valve element 6. The movable valve element 5 is provided with a communication chamber 5a, and the fixed valve element 6 has
A hot water inflow hole 6a, a water inflow hole 6b, and a discharge hole 6c constituting a valve hole are drilled, and these are drilled in a packing guide 8 for a hot water flow path 8a, a water flow path 8b, and a mixed water flow. Each is connected to the road 8c. Hot water and water flowing from the flow paths 8a and 8b are mixed in the communication chamber 5a of the movable valve body 5, and discharged from the mixed water flow path 8c through a faucet (not shown). Water stoppage or flow control is performed by the fixed valve 6
By displacing the movable valve element 5 with each other, the relative positions of the communication chamber 5a and each valve hole are changed.

FIG. 2 shows an example of the packing guide 8 provided with a plate-shaped convex portion. FIG. 2A is a plan view of the packing guide, and FIG. 2B is a cross-sectional view of AOB. The packing guide 8 includes a hot water flow path 8a, a water flow path 8b, and a mixed water flow path 8c. The packing guide 8 has a packing holding portion 11 for holding and fixing the packing. It is provided on the overlapping surface, and a plate-like convex portion 8 d is formed upright around the packing holding portion 11.
The plate-shaped projection 8d has a cross-sectional shape that can be inserted between the inner wall surface of the packing groove provided on the fixed valve body side and the packing. Further, this cross-sectional shape has a cross-sectional thickness and a height that can elastically deform following the deformation of the packing housed in the packing groove.

FIG. 3 shows an example of a packing structure (circular portion M in FIG. 1) between the packing guide 8 and the fixed valve body 6. FIG. 3 is a partially enlarged sectional view of the packing structure. Fixed valve element 6
The packing 7 is housed in a packing groove 10 provided on the side of the packing, and the packing holding portion 1 provided in the packing guide 8 is provided.
1, the plate-like convex portion 8d is inserted between the inner wall surface 10a of the packing groove 10 and the packing 7 while being pressed toward the packing groove bottom. The height L of the plate-shaped projection 8d is
Even if there is a gap A between the packing guide 8 and the fixed valve body 6, the tip of the plate-shaped convex portion 8 d is formed in the packing groove 1 of the fixed valve body 6.
Any height can be used as long as it can engage with zero. With this setting, the sealing performance is further improved, and the operability of the handle lever 9 is not reduced, and the fixed valve body 6
The gap A between the gasket and the packing guide 8 can be maintained.
The packing groove may be formed on the packing guide 8 side, and the packing holding portion 11 and the plate-shaped convex portion 8d may be formed on the fixed valve body 6 side.

FIG. 4 shows a state when the water pressure P is applied in the packing structure. FIG. 4A shows a case with a small gap A, and FIG. 4B shows a case with a gap B larger than the gap A. The packing 7 is pressed against the left inner wall surface 10a of the fixed valve body 6 from the right side in the drawing by the water pressure P. At this time, the plate-shaped convex portion 8d of the packing guide 8 on the left side of the drawing is pressed against the left inner wall surface 10a together with the deformation of the packing 7. Since the plate-shaped projection 8d is formed of a member that can be elastically deformed, for example, a molded body of polyoxymethylene or the like, it is fixed to the inner wall surface 10a in close contact. As a result, even if the high water pressure P is applied, the packing 7 does not protrude from the packing groove 10, does not damage the packing, prevents water leakage, and can maintain the sealing property.

As shown in FIG. 4B, when the fixed valve body 6 and the packing guide 8 have a large clearance B,
Due to the water pressure P, the packing 7 is pressed more strongly on the left inner wall surface 10a of the fixed valve body 6 than on the right side in the drawing. But,
If the plate-shaped convex portion 8d is fixed in close contact with the inner wall surface 10a, the packing 7 may protrude from the packing groove 10 even when a high water pressure P is applied, as in the case of FIG. Without damaging the packing, preventing water leakage and maintaining the sealing performance.

FIG. 10 shows another example of a valve device used for a single lever type mixing faucet. FIG. 10 is a sectional view thereof. The valve device shown in FIG. 10 is the same as the valve device shown in FIG. 1 except for the packing structure of the packing guide 8 and the fixed valve body 6 (circular portion M in FIG. 10). FIG. 11 shows the packing structure of this valve device. FIG. 11 is a partially enlarged sectional view of the packing structure. The packing 7 is accommodated in a packing groove 10 provided in the packing guide 8. Also,
The packing guide 8 is provided with a plate-like projection 8e that extends one side wall of the packing groove 10 toward the fixed valve body. The fixed valve element 6 is provided with a concave portion 6d and a plate-shaped convex portion 8e.
Is inserted. The surface 6e of the fixed valve body 6 against which the packing is pressed is polished. Since the packing 7 is pressed in close contact with the polishing process, the sealing property is improved. In addition, since the fixed valve element 6 is provided only with the concave portion 6d and has no convex portion on the surface, the polishing process can be easily performed.

The height of the plate-like convex portion 8e is
Even if a gap A or B occurs between the fixed valve body 6 and the fixed valve body 6, it is sufficient that the tip of the plate-shaped convex portion 8 e can be engaged with the concave portion 6 d of the fixed valve body 6. With this setting, the sealing performance is further improved, and the gap A between the fixed valve element 6 and the packing guide 8 can be maintained without lowering the operability of the handle lever 9.

When a water pressure P is applied to the packing structure, the packing 7 is pressed against the left inner wall surface of the packing guide 8 from the right side in the case of a small clearance interval A (FIG. 11B). The packing 7 tries to enter the recess 6d, but is difficult to enter because the direction in which the water pressure P is applied does not match the direction in which the packing 7 attempts to enter the recess 6d. Also,
Large gap B due to variations in individual component dimensions
Even in the case of (FIG. 11C), as long as the plate-like convex portion 8e is tightly fixed to the inner wall surface of the concave portion 6d, the packing 7 is high as in the case of FIG. 11B. Even if the water pressure P is applied, it does not protrude from the packing groove 10. As a result, the packing is not damaged, water leakage is prevented, and the sealing performance can be maintained.

The concave portion 6d provided in the fixed valve body 6 may have a trapezoidal cross section as shown in FIG. 11 as long as it has a shape into which the plate-like convex portion 8e provided in the packing guide 8 can be inserted.
The cross section may be triangular or rectangular in cross section. Further, the concave portions 6d may be provided on both sides of the packing guide 10.

The single-lever mixing faucet of the present invention is obtained by incorporating the above valve device. Since the valve device is used, even if the water pressure fluctuates, water leakage does not occur, and the operability of the handle lever is improved.

[0021]

EXAMPLE 1 A single-lever type valve having the same structure as that of the valve device of the present invention shown in FIG. 1 as Example 1 and FIG. 10 as Example 2 and the conventional valve device shown in FIG. The mixing faucet was assembled, and a limit pressure test of feed water pressure was performed. The clearance between the fixed valve element 6, the packing guide 8 and the gap was set to 0.1 mm. The limit pressure test is a test for determining whether or not the water pressure from a water pipe can be tolerated and, if so, to what extent. In the test method, a water pressure was applied to the water valve hole 8b of the single lever type mixing faucet by using a pump, and the pressure until water leakage occurred was measured. The measurement was performed at n = 10.

As a result of the limit pressure test, the single lever type mixing faucet of Example 1 and Example 2 showed a limit pressure value higher than the comparative example by 5 MPa on average, and the standard deviation was half that of the comparative example. , And the variation was small.

Next, using the single-lever mixing faucet of each of the examples and comparative examples, the limiting withstand pressure when the clearance was varied from 0.1 mm to 0.5 mm was measured in the same manner as described above. The results are shown in FIG. FIG. 5 shows a case where the limit pressure resistance when the clearance between the fixed valve body 6 and the packing guide 8 of the first embodiment shown in FIG. 1 is set to 0.1 mm is set to 100%. FIG. 7 is a plot diagram of numerical values obtained by relative comparison of critical withstand pressures of FIG. As shown in FIG. 5, the limit pressure resistance of the single-lever type mixing faucet of each embodiment showed a substantially constant value even when the clearance was increased from 0.1 mm to 0.5 mm. on the other hand,
In the comparative example, as the gap became larger, the limit withstand voltage was greatly reduced. As described above, the single-lever type mixing faucet of each of the examples has improved sealing performance and can prevent poor water stoppage.

When the flow rate when the single lever type mixing faucet was fully opened was measured, the single lever type mixing faucet of Example 2 shown in FIG. 10 was replaced with the single lever type mixing faucet of Example 1 shown in FIG. Approximately 10% higher flow rate than the stopper.
This is because the recess 6d provided in the fixed valve body 6 was provided only on one side, so that the flow passage area of the packing guide and the valve hole area of the fixed valve body could be formed widely.

[0025]

According to the valve device of the present invention, one of the packing guide and the fixed valve body has a packing groove for accommodating the packing, and the other has an elasticity following the deformation of the packing accommodated in the packing groove. Because it can be deformed and has a plate-shaped convex portion that can be inserted between the inner wall surface of the packing groove and the packing, it is easy to maintain the clearance between the packing guide and the fixed valve body, and even if the water pressure fluctuates, Water leakage does not occur due to high limit pressure resistance.

In another valve device according to the present invention, the packing guide has a plate-like convex portion extending at least one side wall toward the fixed valve body, and a packing groove for receiving the packing is provided. The valve body has a concave portion into which the plate-shaped convex portion can be inserted, and at least the surface against which the packing is pressed is polished, so that the flow passage area of the packing guide and the valve hole area of the fixed valve body are widely formed. can do. As a result, the flow rate can be improved. Further, it is easy to maintain the clearance between the packing guide and the fixed valve body, and even if the water pressure fluctuates, there is no water leakage due to a high limit pressure resistance.

[0027] The single-lever mixing faucet of the present invention uses the above-mentioned valve device, and thus is excellent in sealability and operability of the handle lever.

[Brief description of the drawings]

FIG. 1 is a sectional view of a valve device.

FIG. 2 is a view showing a packing guide provided with a plate-shaped convex portion.

FIG. 3 is a partially enlarged sectional view of a packing structure.

FIG. 4 is a diagram showing a state when a water pressure is applied.

FIG. 5 is a diagram in which a limit withstand voltage with respect to a gap is plotted.

FIG. 6 is a cross-sectional view of a valve device for a three-hole mixing faucet.

FIG. 7 is a partially enlarged sectional view of a packing structure in FIG.

FIG. 8 is a diagram showing a state when a water pressure is applied in FIG. 6;

FIG. 9 is a view showing an example in which a packing groove is provided in a packing guide and a fixed valve body.

FIG. 10 is a sectional view of another valve device.

FIG. 11 is a partially enlarged sectional view of a packing structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve apparatus 2 Lever shaft 3 Lever holder 4 Housing 5 Movable valve body 6 Fixed valve body 7 Packing 8 Packing guide 9 Handle lever 10 Packing groove 11 Packing holding part

Claims (3)

[Claims] A fixed valve body having a valve hole fixed to a packing guide provided at a bottom portion of the housing via a packing and communicating with a flow path of the packing guide, and slidably superimposed on the fixed valve body. A valve device that performs water stoppage or flow rate adjustment by mutual displacement with a movable valve body having a communication chamber communicating with the valve hole, wherein the packing is accommodated in one of the packing guide and the fixed valve body. A packing groove is provided, and a plate-shaped convex portion that can be elastically deformed following the deformation of the packing housed in the packing groove and that can be inserted between the inner wall surface of the packing groove and the packing is provided on the other side. A valve device comprising: 2. A fixed valve body, which is fixed via a packing to a packing guide provided on a bottom portion of a housing and has a valve hole communicating with a flow path of the packing guide, and slidably overlaps the fixed valve body. In the valve device for performing water stoppage or flow control by mutual displacement with a movable valve body having a communication chamber communicating with the valve hole, the packing guide has at least one side wall extending toward the fixed valve body. A packing groove having a plate-shaped convex portion is provided.The fixed valve body has a concave portion into which the plate-shaped convex portion can be inserted, and at least a surface against which the packing housed in the packing groove is pressed is polished. A valve device comprising: 3. The valve according to claim 1, wherein the valve device is a single-lever type mixing faucet in which water is stopped or flow rate is adjusted by operating a handle lever engaged with a movable valve body of the valve device. A single-lever mixing faucet characterized by being a device.