JP2604062Y2 - Faucet valve device - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention is used for tap water faucet, hot / cold water mixing faucet, flow switching tap of hot water washer for toilet bowl, etc., and water stoppage or flow rate adjustment by displacement of valve body which slides. The present invention relates to a valve device for performing the following.

[0002]

2. Description of the Related Art Generally, among valve devices used for domestic water supply, those shown in FIGS. 1 to 5 are well known as valve devices for mixing hot water and cold water.

This device has an outflow passage 2 on a side surface of a housing 1 that covers a valve body, and an inflow passage 3 and an inflow passage 4 are provided in a base 12.
And one of the two inflow paths is connected to a water pipe, and the other is connected to a water heater.

A fixed valve element 6, a movable valve element 7, and a ring-shaped guide plate 8 are accommodated in a valve accommodating recess 5 provided inside the housing 1 in a state where the fixed valve element 6 and the ring-shaped guide plate 8 are sequentially overlapped from the bottom. A lever 10 for operating a valve is mounted on a lever holder 9 which is rotatably mounted on the inside of the unit.

Here, the fixed valve element 6 is fixed to the base 12 by fitting with the inner diameter surface of the housing 1 and a projection 11 provided on the base 12, and a pair of inflow paths 13, 1.
4 are formed in a C-shape and communicate with the outflow passages 3 and 4 of the housing 1 at predetermined positions of the movable valve body 7. Further, the disk-shaped movable valve element 7 having a smaller diameter than the inner diameter of the valve storage recess 5 is sandwiched between the guide plate 8 and the fixed valve element 6,
Sliding with respect to the fixed valve body 6 and the guide plate 8 is free, and the outflow path 2
There is provided a flow passage 15 communicating with the air passage.

Further, a rubber packing 16 is incorporated between the fixed valve 6 and the base 12, and the elasticity of the packing 16 allows the base 12 and the fixed valve 6, and the fixed valve 6 and the movable valve 6 to move. 7. The space between the movable valve element 7 and the guide plate 8 is sealed. The movable valve body 7 and the lever 10 are interlocked via a link rod 17, and the link rod 17 is supported by a pin 18 on a lever holder 9. By driving the body 7 and displacing the flow passage 15, hot water / cold water and mixed water can be taken out and plugged.

FIGS. 1 and 2 show that the movable valve element 7 is most displaced to the right in FIG.
FIG. 3 shows the position of the movable valve body 7 in which the flow passage 15 communicates with one of the flow passages 13,
FIG. 4 shows a state where hot or cold water is taken out alone.
Indicates the position of the movable valve body 7 in which the flow passage 15 communicates with the two flow passages 13 and 14, and indicates a state in which the mixed water is taken out.

The valve device as described above adjusts the flow rate or changes the flow path in accordance with the state of sliding between the sliding surfaces of the fixed valve body 6 and the movable valve body 7. The present invention can be used not only for mixing faucets but also for switching the flow path of a hot water washer installed in a toilet or the like.

A polyetherketone resin 3 is used as a component of the fixed valve 6 or the movable valve 7 of the valve device.
Carbon fiber 1 having an average fiber diameter of 5 μm to 90% by weight and 8 μm or less
A resin composition comprising 0 to 65% by weight and further containing an inorganic powder filler such as natural mica is disclosed in Japanese Patent Application No. Hei.
No. 87. Alternatively, a resin composition comprising 25 to 80% by weight of a polyphenylene sulfide resin and 20 to 75% by weight of carbon fibers having an average fiber diameter of 8 μm or less has been proposed (Japanese Patent Application No. 1-10686).

[0010]

However, in the valve device in which the movable valve body and the fixed valve body are made of the above-described one kind of resin composition, the sliding surfaces are in close contact and the operability is liable to be deteriorated. The valve device has a problem that the wear amount increases with the handle torque of the valve body, and the durability cannot be sufficiently satisfied.

In view of the above, the present invention provides a valve device in which the valve elements are brought into sliding contact with each other under conditions of good abrasion resistance so that the handleability is low, the operability is good, and the durability is excellent. It is an issue.

[0012]

In order to solve the above-mentioned problems, in the present invention, a valve body fixed inside a housing and a movable valve body slidably superimposed on the fixed valve body are cut. A faucet that forms a notch or opening, and performs water stoppage or flow rate adjustment by displacement of these pair of valve bodies
In the valve device, the fixed valve body and the movable valve body are each formed of a molded body mainly composed of different kinds of synthetic resins having no close contact with each other.

[0013] More preferably, the movable valve body is formed of a molded body mainly composed of a synthetic resin having a smaller bending elastic modulus than the fixed valve body.

[0014]

In the valve apparatus for a faucet according to the present invention, since the compatibility (affinity) of the synthetic resin, which is a main component, does not act on the sliding contact surface between the fixed valve body and the movable valve body, the sliding contact surface does not adhere. The state is maintained, so that the wear resistance of both valve bodies is improved. further,
Those said movable valve member is small flexural modulus of elasticity than the fixed valve body
As a result , the movable valve element does not get into the fixed valve element, and the sliding surface is maintained in a good sliding state, has abrasion resistance, and can maintain a low handle torque for a longer time.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, as a synthetic resin which is a main component of a valve body used in the present invention, a synthetic resin having good heat and cold resistance may be selected and adopted depending on the temperature of water or other liquid to be circulated, and is particularly limited. Not something. Particularly preferable examples in terms of heat resistance include polyphenylene sulfide resin, polycyano aryl ether resin, and polyether ether ketone resin. Examples of commercially available resins include Ryton R-4 manufactured by Philips in the United States as polyphenylene sulfide resin, and ID300 manufactured by Idemitsu Kosan Co., Ltd. as polycyano aryl ether resin.

The composition constituting the resin valve body of this valve device includes, for example, molybdenum disulfide, fluororesin,
Silicone oil, fluorinated oils and other lubricity improvers, glass fibers, boron fibers, wollastonite, potassium titanate whiskers and other reinforcing agents, other metal dispersants and other extenders, and pigments, etc. You may add in the range which does not inhibit the objective.

In order to mold such a resin composition, various raw materials and various additives as necessary are separately used, or two or more kinds are simultaneously used in a mixer such as a Henschel mixer, a ball mill, a tumbler mixer or the like. And then dry-mixed, then melt-mixed with a hot roll, kneader, Banbury mixer, melt extruder, or the like, and melt-molded into a predetermined shape.

After the molding, post-processing is performed in order to obtain a flatness on the sliding surface. That is, after adjusting the parallelism and flatness of the molded article material with a surface grinder or the like, the surface is polished by about 10 to 50 μm with a lapping machine, and at least one of the fixed valve body and the movable valve body has a surface roughness of 2 μm.
Mirror finish to less than μm.

[Examples 1 to 4, Comparative Examples 1 and 2] Examples and comparative examples of the present invention will be described below with reference to the drawings.

The fixed valve body 6 and the movable valve body 7 are molded by injection molding from the compositions of the formulation examples (a) to (e) (% by weight) shown in Table 1, and then the sliding surfaces are formed by an automatic lapping machine. The valve body was manufactured by chucking the lapping machine so as to be in close contact with the lapping machine and polishing the sliding contact surface while rotating the valve body. The obtained valve element was mounted on a valve device so as to be a combination shown in Table 2. In addition, the bending elastic modulus before use of the valve body having the composition of (a) to (e) used and the bending elastic modulus at the time of 0.7% water absorption assuming the use state were examined, and the results are shown in Table 1. Also described.

Here, as shown in FIG. 1, in the embodiment and the comparative example, the inflow path 1 is provided on a base 12 inside the housing 1.
Solid Teibentai 6 that have a 3,14 provided a tubular lever holder 9 with a flange on the first upper inner housing is attached rotatably, a stepped annular groove of the lower flange surface, from above The packing 19 and the guide plate 8 made of ultra-high molecular weight polyethylene were sequentially stored. And the fixed valve element 6
A movable valve element 7 is provided between the guide plate 8 and the movable valve element 7 so as to be slidably contacted with them in a liquid-tight manner, and the sliding contact surface of the movable valve element 7 of the guide plate 8 is formed as a mirror surface having a surface roughness of 2 μm or less. And the lever holder 9
Is formed of a polyacetal resin, a pin 18 is horizontally attached to the resin, a link rod 17 and a lever 10 are continuously provided, and two lower portions of the outer periphery of the movable valve body 7 are cut out to form a housing 1. A flow path 15 for communicating or blocking the outflow path 2 and the inflow paths 13 and 14 formed on the side surfaces.
Was formed.

[0022]

[Table 1]

[0023]

[Table 2]

Next, a practical function test as described below was performed on such a valve device (of the same type as the single lever type mixer tap KM300N manufactured by KVK), and the initial torque value and water stoppage were examined.

Practical function test: The valve bodies used in Examples and Comparative Examples were mounted using a single lever type mixer tap KM300N manufactured by KVK, and an initial torque test and a water stop test were performed. In the torque test, upper and lower levers (water stoppage, flow, flow rate control) and left and right (temperature control of hot water and cold water) are measured using a digital force gauge DFG-2K manufactured by Shinpo Kogyo Co., Ltd. In the test, the lever was set at the lower center (water-stopped state), the water pressure was applied to a maximum of 17.5 kgf / cm ² by a pump, and the maximum water pressure at which no water leaked for one minute was measured.

In these initial tests, the torque was 5 k
g · cm or less and the water stoppage test is 17.5 kgf / cm ²
For the one completely stopped in the above, the lever 10 of the same single-lever mixer tap as that initially tested was connected to a single-lever mixer tap durability tester (not shown),
As shown in FIG. 5, the lever 10 is moved from the upper right end Ru to the lower right end Rd (cold water) → the lower left end Ld (hot water 90 ° C.) → the upper left end Lu (water stoppage) → the lower left end Ld (hot water 90 ° C.) → the lower center Cd. (Warm water) → upper center Cu (water stop) → lower center C
d (warm water) → lower right end Rd (cold water) → upper right end Ru (water stop) as one cycle (required time: about 25 seconds), a 200,000 cycle endurance test, 100,000 cycles and 2
The torque and the water stoppage after the test of 100,000 cycles were confirmed in the same manner as in the initial stage.

As a result, Comparative Examples 1 and 2 in which a valve element whose main component was made of the same resin were mounted in combination,
During the continuous test, the sliding surfaces made close contact (adhesion), the handle torque increased, and abnormal wear occurred. Also, 20
After a test of 10,000 cycles, a leak occurred at the lower portion of the valve device under a hydraulic condition of 17.5 kgf / cm ² .

On the other hand, in Examples 1 to 3 in which the valve bodies of Formulation Examples (a) to (e) are mounted in a predetermined combination and the movable valve body has a smaller flexural modulus than the fixed valve body, Up to 1 before and after
At a water pressure of 7.5 kgf / cm ² , there was no leakage at all, and the handle torque was low at 4.8 kgf · cm or less, and was stable and excellent in operability and durability.

In the fourth embodiment, in which the movable valve element has a larger bending elastic modulus than the fixed valve element, the handle torque after 300,000 cycles is 7.5 kgf · cm, which is slightly higher than in the first to third embodiments. There was no water leakage, and one that could be used was obtained.

[0030]

[Effect] As described above, the present invention provides a valve device for a faucet.
The fixed valve body and the movable valve body are made of a molded body mainly composed of different kinds of synthetic resins that do not adhere to each other, so that the valve bodies do not adhere to each other and have low handle torque, good operability, and Since the abrasion resistance of both valve bodies is improved, there is an advantage that the faucet valve device has extremely excellent durability.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating the structure of a valve device.

FIG. 2 is a cross-sectional view illustrating an operation state of the valve device.

FIG. 3 is a cross-sectional view illustrating an operation state of the valve device.

FIG. 4 is a cross-sectional view illustrating an operation state of the valve device.

FIG. 5 is a perspective view showing the appearance of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Outflow path 3, 4, 13, 14 Inflow path 5 Valve storage recess 6 Fixed valve element 7 Movable valve element 8 Guide plate 10 Lever 12 Base 16 Packing

Claims (2)

(57) [Scope of request for utility model registration] 1. A notch or an opening is formed in each of a valve element fixed inside a housing and a movable valve element slidably superimposed on the fixed valve element. in the faucet valve device which performs flow adjustment, the faucet valve system, wherein the fixed valve body and the movable valve body is a molded body whose main component different kinds of synthetic resins having no adhesion to each other . 2. The valve apparatus for a water faucet according to claim 1, wherein the movable valve body is a molded body whose main component is a synthetic resin having a smaller flexural modulus than the fixed valve body.