JP2965309B2 - Hot water mixing faucet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a hot and cold water mixing faucet in which water supply adjustment and temperature adjustment by adjusting a mixing ratio of hot and cold water can be performed with a single lever. About.

[Conventional technology]

A water faucet in which a valve body having a notch or an opening is slidably superimposed and arranged so as to stop or adjust the flow by rotating or sliding the valve body is already well known.

FIGS. 1 to 4 show the structure of a hot and cold water mixing faucet used for domestic water supply as a specific example of a conventional liquid mixing valve.

In these figures, the outflow path 2
And the packing guide are provided with an inflow passage 3 and an inflow passage 4,
One of these two inflow channels is connected to a water pipe, and the other is connected to a water heater.

The valve body 6, the valve body 7, and the guide plate 8 are housed in the valve housing recess 5 provided inside the housing 1 in a state where the valve body 6 and the guide plate 8 are sequentially overlapped from the bottom, and are mounted on the upper lid 9 fixed on the housing 1. A lever 10 for operating a valve is provided.

Here, the valve element 6 is fixed to the base 12 by fitting with the inner diameter surface of the housing 1 and the projection 11 provided on the base 12, the outflow path 2 is provided at the center, and a pair of inflow paths 13 are provided around the outflow path 2.
14 is formed so as to communicate with the outflow channel 2 and the inflow channels 3 and 4 of the housing 1. Further, the valve element 7 is a disc that is sandwiched between the guide plate 8 and the valve element 6 and has a smaller diameter than the inner diameter of the valve housing recess 5, and is slidable with respect to the valve element 6 and the guide plate 8. In addition, the outflow path 2
There is provided a flow passage 15 communicating with the air passage.

Further, a rubber O is provided between the valve body 6 and the base 12.
The ring 16 is incorporated, and by the elasticity of the O-ring 16,
Base 12 and valve body 6, valve body 6 and valve body 7, valve body 7 and guide plate 8
Are sealed. In addition, the valve element 7
The lever 10 is interlocked with the lever 10 via a link rod 17. The link rod 17 is supported by the upper lid 9 with a pin 18.
, Hot water / cold water and mixed water can be taken out and plugged.

1 and 2 show a closed state in which the valve element 7 is displaced most to the right side in the figure and the flow passage 15 does not communicate with any of the two inflow passages 13 and 14, and FIG. FIG. 4 shows the position of the valve body 7 communicating with one of the inflow passages 13, showing a state in which hot or cold water is taken out alone, and FIG.
4 shows the position of the valve body 7 communicating with the valve 14 and shows the state of taking out the mixed water.

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 valve bodies 6 and 7, and is not limited to a mixing tap of hot / cold water. It can also be used for switching the flow path of a hot water washer installed in a toilet or the like.

Such a conventional mixing tap usually uses a valve element 7 made of a copper alloy or stainless steel. However, if foreign matter such as cutting powder, rust, sand, or pebbles enters the sliding surface between the metal valve element 7 and the valve element 6 due to piping work or the like, the sliding contact surface is bitten, and the sealing property is reduced. Phenomena such as water leakage or inability to discharge water due to deterioration occur. On the other hand, there is also a method of using a very hard ceramic for the valve body 7 and the valve body 6 and making the surface roughness of the sliding contact surface extremely small, thereby preventing foreign substances from biting into the sliding contact surface. However, in such a structure, the sliding resistance of the valve body 7 is increased, so that a new lubricating means for reducing the driving force when the lever is rotated is required. Cracks or cracks may occur due to temperature differences during assembly and use. In addition, ceramics require prolonged surface polishing to extremely increase the flatness and surface roughness of the sliding contact surface, resulting in processing cost Not only is it expensive, but even if you apply a lubricant to reduce the movement, the lubricant leaks out during use,
There is a problem that the driving force increases in a short period of time.

Therefore, in order to solve such a problem, it is only necessary to impart lubricity to the high-hardness ceramic itself, but since the lubricant cannot withstand the molding temperature and is thermally decomposed, this method is also practical. Is impossible. In order to eliminate the weak points of ceramics such as non-lubricity, cracks caused by mechanical or thermal shock, etc., the valve body is made of self-lubricating resin such as fluororesin or ultra high molecular weight polyethylene or disulfide. There has been an attempt to use a resin filled with a self-lubricating filler such as molybdenum and carbon (for example, Japanese Patent Application Laid-Open No. 63-36765). Excellent, but
Poor creep resistance, even if reinforced with fibers, it does not provide sufficient reinforcing effect due to poor wetting property between resin and reinforcing agent, and as a result can only withstand low water pressure, or this resin It was necessary to make the thickness of the valve body large, far from the practical level. Even in a system in which a self-lubricating filler is filled in a resin having a large reinforcing effect, it is necessary to use a considerable amount of a lubricating filler in order to obtain sufficient lubricating properties. Or, the creep resistance is remarkably deteriorated, and problems such as crack generation or poor water stopping occur.On the other hand, if the amount of the lubricating filler is too small, the lubrication of the sliding surface of the valve body deteriorates. A problem arises because the handle torque of the operating lever or the like increases.

In order to solve these problems, the present inventors have proposed in Japanese Patent Application No. 1-10686 a mixed faucet using a valve body made of a polyphenylene sulfide resin and carbon fibers having an average fiber diameter of 8 μm or less. Although the mixing faucet had a relatively low torque, the steering wheel torque gradually decreased during the endurance test, and this tendency was particularly remarkable after 200,000 cycles.

Also, as described in Japanese Utility Model Laid-Open No. 63-24460, there is a proposal to apply a resin coating on the upper surface of the sliding valve body and reduce the handle torque of a lever or the like by the lubricity of the resin. In addition, the resin coating peels off due to long-term use, and the torque increases. In addition, when a guide plate made of polyacetal resin or polyethylene terephthalate resin is mounted between the upper lid and the upper surface of the valve body on the sliding side, satisfactory sliding characteristics cannot be obtained. When the tetrafluoroethylene resin was used as the guide plate 8 of the mixing faucet having the structure shown in FIG. 4, the sealing property was weak, and water could not leak from the guide plate portion and could not be stopped.

[Problems to be solved by the invention]

As described above, in the conventional technology, it is not necessary to apply a lubricant to the sliding surface between the valve bodies, the driving operation is light for a long time, the mechanical or thermal shock is strong, and the water leakage is prevented. However, there has been a problem that a valve device for a faucet that can prevent accidents such as inability to discharge water has not been obtained.
It was an issue to solve these.

[Means for solving the problem]

In order to solve the above problems, the present invention provides a hot and cold water mixing faucet, wherein a sliding valve element comprises a polyphenylene sulfide resin or a polymer alloy containing a polyphenylene sulfide resin, and a filler; And a guide plate attached to the upper cover, which is in sliding contact with the upper surface of the valve body, is made of high molecular weight polyethylene. Alternatively, two inflow paths, a hot water port and a cold water port, are formed in the valve body on the fixed side of the hot and cold water mixing faucet, and the outflow path is provided on the side of the housing that houses the upper lid, the sliding side valve body and the fixed side valve body. Means provided with can be adopted. The details are described below.

First, the polyphenylene sulfide (PPS) resin used in the present invention has a general formula In particular, a polymer comprising a repeating unit represented by the following formula (1), particularly containing at least 90 mol% of a repeating unit is preferable in terms of characteristics, and if it is less than 90 mol%, a composition having expected properties is difficult to obtain, which is not preferable. In order to obtain such a polymer, a well-known method may be used. For example, sodium sulfide and p-dichlorobenzene are mixed with N-methylpyrrolidone, an amide solvent such as dimethylacetamide or a sulfolane. The reaction is preferably performed in a sulfone-based solvent. In addition, as long as the crystallinity of the polymer is not affected, for example, (Where R is a group such as alkyl, nitro, phenyl, alkoxy, etc.) And less than 10 mol% of a copolymer component. Such PPS resins can be prepared, for example, by reacting a halogen-substituted aromatic compound with an alkali sulfide as disclosed in JP-B-44-27671 and JP-B-45-3368.
No. 5 publication discloses a condensation reaction of an aromatic compound with sulfur chloride in the presence of a Lewis acid catalyst, or an alkali catalyst or a copper salt of a thiophenol as disclosed in U.S. Pat. Is synthesized by a condensation reaction or the like in the coexistence of, and a specific method can be arbitrarily selected according to the purpose. In addition, the PPS resin is an uncrosslinked product that is almost white immediately after the reaction such as condensation as described above, and has a low molecular weight and a low viscosity as it is, so that it is used for applications such as extrusion molding and injection molding. For example, it is heated to below the melting point in air, and is oxidatively cross-linked to increase the molecular weight, and is changed to one having a melt viscosity suitable for extrusion molding, injection molding and the like. The melt viscosity (orifice: of Ryton P-4 (manufactured by Phillip Spetroleum Co., Ltd.) commercially available for melt molding after such treatment is performed.
A diameter of 1 mm, a length of 2 mm and a load of 10 kg) is 1000 to 5000 poise.

However, as described above, such a PPS resin is obtained by oxidatively cross-linking a low-molecular-weight material, so that it becomes brittle depending on the composition, has a low impact strength, and is susceptible to foreign matter entering the sliding portion. Also, there is a possibility that a part of the sliding surface is lost, and the wear of the sliding surface is promoted. In order to improve such brittleness, it is preferable to use a linear PPS resin. Incidentally, such a linear PPS resin is disclosed in JP-A-61-733.
No. 2, manufactured by a method as disclosed in JP-A-61-66720, etc., without performing a heat treatment at a high temperature after polymerization and adding a crosslinking agent, etc. In addition, KPS-W214 manufactured by Kureha Chemical Industry Co., Ltd. can be exemplified.

Further, instead of such a PPS resin, a polymer alloy of a PPS resin and another resin may be adopted.
Polymer alloy of resin and polyphenylene ether resin (PPE resin), PPS resin and polyetherimide resin (PEI
Resin alloy) or a polymer alloy of a PPS resin and a polyamide resin (PA resin). Among these, polymer alloys of PPS resin and PPE resin were purchased from G.E., Tosoh, or Mitsubishi Gas Chemical, USA.
Resin and PEI resin polymer alloys are provided by GE, USA, and PPS resin and PA resin alloys are provided by Mitsubishi Gas Chemical Company.

Next, the fillers used in the present invention are not particularly limited, but carbon fibers are preferable for fibers, and heat-resistant inorganic powder fillers having an average particle diameter of 20 μm or less are preferable for powders. The carbon fiber is not particularly limited in its raw material, and employs acrylonitrile-based, pitch-based, cellulose-based, etc., but in particular acrylonitrile-based carbon in consideration of its excellent reinforcing effect of enhancing mechanical strength such as creep resistance. Fibers may be preferred.

The elastic modulus of acrylonitrile-based carbon fiber is usually
It is a 24,000 kg / mm ² approximately, 35000Kg in this invention
It is preferable to use a carbon fiber having an elastic modulus of / mm ² or more. This is because, in the case of low elastic modulus carbon fibers, due to sliding resistance, bent carbon fibers exist between sliding surfaces, which may adversely affect lubricity or promote wear of a resin valve body. whereas, in the carbon fiber of elastic modulus 35000kg / mm ² or more high elastic modulus, for progressively scraped into powder with a light force from the edge portion of the carbon fiber by mating material, the most adverse effect on friction and wear It seems that it is not given. From the reason for such estimation, it is preferable that the carbon fiber has a small tensile elongation, specifically, a carbon fiber having a tensile elongation of 1.0% or less. Also,
The carbon fiber preferably has a fiber diameter of 8 μm or less.
This is because there are carbon fibers that have fallen off from the material structure on the sliding contact surface or have been bent by the mating material, but as described above, they have the smallest possible unit, for example, granularity, lubricity, This is because it is advantageous for wear resistance. The heat-resistant inorganic powdery filler is an inorganic substance that withstands the molding temperature of the PPS resin as the base resin, that is, 280 to 380 ° C., for example, mica, talc, kaolin, calcium carbonate, carbon,
Examples include graphite, silica, clay, magnesium carbonate, antimony trioxide, glass beads, glass balloons, and the like. In order to obtain a surface roughness (Ra) of 1.0 μm or less during the post-processing of the sliding surface after molding described below, it is important that the average particle size of these heat-resistant inorganic substances is 20 μm or less. Among them, it is preferable that the average particle size is 20 μm or less, and particles in the range of 1 to 50 μm account for 80% by weight or more, but the particles having an average particle size of 10 μm or less and 1 to 30 μm are 80% by weight. It is even more preferred to account for at least% by weight. Furthermore, when such an inorganic powdery substance is used in combination with carbon fiber, the anisotropy of the coefficient of thermal expansion or mechanical strength generated at the time of molding when using only carbon fiber,
It can be reduced while maintaining good creep resistance and high elasticity. As a result, particularly when used as a valve device for a mixed faucet of hot water / cold water, more accurate water stoppage can be obtained. Furthermore, depending on the type of the inorganic powder, mica, calcium carbonate, talc, etc. are particularly preferable because they contribute to the improvement of lubricity and can obtain a small handle torque. In addition, kaolin or graphite (graphitized granular phenol is used). And the like) are particularly preferable because they contribute to abrasion resistance and can provide a hot and cold water mixing faucet having excellent durability.

In the present invention, the mixing ratio of the PPS resin or the polymer alloy of the PPS resin and another resin and the fillers is such that the PPS resin 2
5 to 80% by weight, fillers 20 to 75% by weight. If the amount of PPS resin exceeds 80% by weight, the modulus of elasticity is too small and the vicinity of the surface of the valve body is deformed, and sufficient water stopping cannot be achieved. If the amount is less than 25% by weight, moldability is poor. In addition, the impact strength is significantly reduced.

The high molecular weight polyethylene used in the present invention has a molecular weight of 600,000 or more by a viscosity method, and is manufactured by Hoechst, Germany: GUR412 or Mitsui Petrochemical Co., Ltd .: Million 240S or Lubuma-L4000 manufactured by the company. , L5000 and the like.

The sliding valve element made of the PPS resin or the polymer alloy containing the PPS resin and the upper lid made of this high-molecular-weight polyethylene, or the mixing faucet that slides the guide plate attached to the upper lid, has a light handle torque. Can be maintained for more than 200,000 cycles for a long time.

In addition, even in the high-molecular-weight polyethylene constituting the guide plate inserted into the top lid or the fixed lid of the hot and cold water mixing faucet of the present invention, the filling used in the usual composition is not detracted from the object of the present invention. Agents can be used. For example, lubricity improvers such as carbon, graphite molybdenum disulfide, fluororesin, silicone oil, and fluorinated oil; reinforcing agents such as carbon fiber, glass fiber, boron fiber, wollastonite, and potassium titanate; and other metal oxides Any substance that can withstand the molding temperature of high molecular weight polyethylene, such as pigments, etc., may be used.

Further, the sliding valve element of the hot and cold water mixing faucet of the present invention is obtained by mixing the above-mentioned PPS resin or the polymer alloy containing the PPS resin, fillers, and further, inorganic powdery fillers, and molding this. The method of mixing is not particularly limited, for example, each of these raw materials and various additives as necessary, separately, or at the same time two or more kinds Henschel mixer, ball mill,
After dry-mixing using a mixer such as a tumbler mixer, the mixture may be melt-mixed with a hot roll, kneader, Banbury mixer, melt extruder or the like and melt-molded into a predetermined shape.
The melting and mixing temperature at this time is higher than the temperature at which the PPS resin melts,
Specifically, it is 280-380 ° C, preferably 280-350 ° C.
Also, the melt molding method is not particularly limited, but the injection molding method is preferable in consideration of mass productivity and cost reduction. Since it is very difficult to obtain the final shape including the flatness of the sliding contact surface only by injection molding, so-called injection compression molding, in which compression molding can be performed in the same mold immediately after injection molding, is advantageous. Usually, post-processing is performed after molding to obtain an excellent flatness of the sliding surface. That is, after adjusting the parallelism and flatness of the molded material using a surface grinder or a double-headed grinder, the surface is polished by about 10 to 50 μm with a lapping machine. In this case, the lapping abrasive used may be one containing alumina, silicon carbide or the like as a main component, and those having a very fine particle size, for example, # 2000 or less, preferably # 4000 or less are suitable. In addition, when wrapping a resin softer than metal with hard abrasive grains, it was expected that the abrasive grains would sink into the resin, but with fine particle sizes such as # 2000 or less, further # 4000 or less If so, the abrasive grains hardly sink into the resin, and a small and good flatness and surface roughness can be obtained. Although the reason is not clear, it is presumed that the harder the abrasive grains, the lower the heat generation of the material to be wrapped, and consequently, the lower the surface hardness or yield point stress. In any case, the flatness is finished at the same time as the flat polishing. The equipment used for such grinding and lapping is
Since it is easy to take a large number of pieces and the material is resin, it can be processed in a very short time as compared with the case of ceramics, metal, and the like, so that it can be manufactured at low cost.

Further, the hot water mixing faucet of the present invention or the guide plate attached to the upper lid, high-molecular-weight polyethylene as it is,
Alternatively, it is produced by mixing fillers and molding the same. The method of mixing is not particularly limited, and may be dry-blended and melt-molded into a predetermined shape in the same manner as in the above-mentioned PPS resin and other mixing methods, and if necessary, dry-blended and then melt-extruded. What is necessary is just to melt-mold in a predetermined shape after melt-mixing with a machine etc. The melt molding method is not particularly limited, but the injection molding method is preferable in consideration of mass productivity and cost reduction. Usually, post-processing such as polishing and lapping is performed to obtain excellent flatness on the sliding surface after molding.

[Action]

In the hot and cold water mixing faucet of the present invention, the sliding valve body used is made of PP
It is made of synthetic resin containing S resin or PPS resin, and the upper lid or the guide plate attached to the upper lid that comes into sliding contact with this sliding valve body is made of high molecular weight polyethylene, so it is resistant to mechanical or thermal shock. And good lubricity can be exhibited over a very long period of time.

〔Example〕

Raw materials used in Examples and Comparative Examples are collectively shown as follows. Write an abbreviation in []
All compounding ratios are parts by weight.

Resin and resin composition: PPS resin [PPS] (manufactured by Philips Petroleum International: Ryton P-4), 70% by weight of polymer alloy of PPS resin and polyamide resin
And 30% by weight of carbon fiber [PPS / PA / CF] (Mitsubishi Gas Chemical Co., Ltd .: Reny HR-230) High molecular weight polyethylene [HMWPE] (Mitsui Petrochemical Co., Ltd .: Lubmar, injection molding grade), polyacetal resin [POM] (manufactured by Polyplastics: Duracon M90) Polybutylene terephthalate resin [PBT] (manufactured by Mitsui Chemicals: Novadur 5008) Carbon fiber [HTA] (manufactured by Toho Rayon: Vesfight HTA, fiber diameter 7.2μ)
m, tensile elasticity 24000 kg / mm ² ) Mica [Mica] (Mica Canada: Mica S-325, average particle size 13μ)
m, 50 μm or less, approx. 99%), calcium carbonate (charcoal) (Nisshi Kogyo Co., Ltd .: NA-600, average particle size 3.5 μm, 50 μm)
Examples 1 to 6: After bundling carbon fibers with an epoxy-based sizing agent, cutting them into fiber lengths of 6 mm, dry-mixing the raw materials in advance at the mixing ratios shown in Table 1, and then biaxially Extruder (Ikegai Iron Works: PCM
−30), and extruded and granulated under the conditions of a cylinder temperature of 300 ° C. and a screw rotation speed of 50 rpm. For the obtained pellets and Example 6, the pellets were used as they were, with a cylinder temperature of 320 ° C., an injection pressure of 500 to 1500 kg / cm ² , and a mold temperature of 140.
Injection molding under the condition of ° C., a single lever mixing faucet KM manufactured by Kitamura Valve Co., Ltd. having a structure as shown in FIGS.
A 300N sliding valve body (valve body 7 in FIG. 1) was obtained. After the resin valve body was formed, the sliding surface thereof was flattened by a surface grinder and the surface roughness was determined by a lapping machine. Also,
The guide plate (guide plate 8 in FIG. 1) inserted into the upper lid that is in sliding contact with the upper surface of the sliding valve body is made of high molecular weight polyethylene [HMWPE].
With a cylinder temperature of 250 ° C, a mold temperature of 30 ° C, and an injection pressure of 500kg
It was obtained by injection molding under the condition of / cm ² . After the resin guide plate was formed, its sliding contact surface was flattened by a surface grinder. Practical function tests were performed using these sliding valve bodies and guide plates, and the results are shown in Table 1. In addition, the evaluation method of this test is as follows.

Practical function test: Using a single lever type mixing faucet KM300N manufactured by Kitamura Valve Co., Ltd., the disk corresponding to the valve element 7 in FIG. An initial torque test and a water stop test before the test were performed. In the torque test, the torque of the lever up and down (water stoppage, flow, flow rate adjustment) and left and right (temperature adjustment of hot water and cold water) is measured by a digital force gauge DFG-2 manufactured by Shinpo Kogyo.
Measured using K, and in the water stop test, the lever was set at the lower center (water stop state), and the water pressure was max.
kgf / cm ² , the maximum water pressure at which no water leaked for 1 minute was measured.

In these initial tests, those having a torque of 5 kgf · cm or less and the water stoppage test completely stopped at a water pressure of 17.5 kgf / cm ² were initially tested on a single lever mixed faucet endurance tester (not shown). The lever 10 of the same single-lever type mixing tap is connected, and as shown in FIG.
Move lever 10 from upper right Ru to lower right Rd (cold water) → lower left Ld (hot water 90 ° C) → upper left Lu (water stop) → lower left Ld
(Hot water 90 ° C) → lower center Cd (warm water) → upper center Cu (water stop) → lower center Cd (warm water) → lower right Rd (cold water) → upper right Ru (water stop) 1 cycle (time required about 25) Seconds), a 300,000 cycle endurance test was performed, and 50,000 cycles,
After 100,000, 200,000 and 300,000 cycles of the test, the torque and the water stoppage were confirmed in the same manner as in the initial stage.

Comparative Examples 1 to 4: Comparative Examples 1 to 4 were performed in exactly the same manner as in Example 1 except that various raw materials were blended at the ratios shown in Table 2.
The sliding valve body 7 of FIG. 1 was manufactured. Further, in Comparative Examples 1 and 3, the guide plate 8 inserted into the upper lid 9 which is in sliding contact with the upper surface of the sliding valve body 7 was made of polyacetal resin [POM] using a cylinder temperature of 210 ° C., a mold temperature of 90 ° C., and an injection pressure of 1000 kg. under conditions / cm ^2, also Comparative examples 2 and 4 are each in Helsingborg butylene terephthalate resin [PBT], cylinder temperature 250 ° C., a mold temperature of 110 ° C., the original condition of the injection pressure 700 kg / cm ² Obtained by injection molding. After the molding, the sliding surface of the resin valve body was flattened by a surface grinder. Practical function tests were conducted using these sliding valve bodies and guide plates, and the results are shown in Table 2.

The following is clear from Tables 1 and 2. That is, in Examples 1 to 6, the results of the durability test after 300,000 cycles in the practical function test showed that there was no change at the maximum water pressure of 17.5 kgf / cm ² , which was the same as before the durability test. Was not. The steering wheel torque was slightly increased after 50,000 cycles compared to before the endurance test, but thereafter remained almost unchanged until the completion of 300,000 cycles. In Examples 3 to 5 using the powdery filler in combination, the value of the handle torque was particularly small as compared with Examples 1 and 2.

On the other hand, Comparative Examples 1 to 4 in which the guide plate inserted into the upper lid slidingly in contact with the upper surface of the sliding valve body was a molded product of Examples other than high molecular weight polyethylene, although there was no problem with water leakage at all, The steering wheel torque gradually increased after 50,000, 100,000 and 200,000 cycles compared to before the endurance test,
Especially after 300,000 cycles, the value was considerably large.

〔effect〕

As described above, in the hot and cold water mixing faucet of the present invention, the sliding valve element is made of PPS resin or a polymer alloy containing PPS resin, and is attached to the upper lid or the upper lid that is in sliding contact with the sliding valve element. Since the guide plate is made of high-molecular-weight polyethylene, the driving operation by the lever is light for a very long time in a wide temperature range from cold water to hot water.
In addition, since it does not crack even if dropped or handled violently, and is extremely resistant to repeated cold and hot water (thermal shock), it is possible to reliably prevent water leakage, inability to discharge water, and the like. Therefore, it can be said that the significance of the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view illustrating the structure of a hot-water mixing faucet used for domestic water supply, FIG. 2 to FIG. 4 are cross-sectional views of a valve body for illustrating an operation mechanism of the valve body, and FIG. FIG. 2 is a perspective view showing the appearance of FIG. 1. 1 ... housing, 2 ... outflow path, 3, 4 ... inflow path,
5: Valve recess, 6, 7: Valve, 8: Guide plate, 9
... Top cover, 10 ... Lever, 13, 14 ... Inflow path, 17 ... Link rod.

Claims (2)

(57) [Claims] 1. A fixed side valve body and a sliding side valve body are slidably overlapped and housed in a valve housing recess of a hot and cold water mixing faucet, and a central opening is provided above the sliding side valve body. A water alloy mixing faucet in which an upper lid is housed and a valve body operation link rod is connected to the center of the sliding side valve body, wherein the sliding side valve body is made of a polymer alloy containing polyphenylene sulfide resin or polyphenylene sulfide resin. Wherein the upper lid or a guide plate attached to the upper lid, which is in sliding contact with the upper surface of the valve element on the sliding side, is made of high molecular weight polyethylene. 2. A fixed-side valve body of the hot and cold water mixing faucet according to claim 1, wherein two inflow paths of a hot water port and a cold water port are formed, and an upper lid, a sliding-side valve body and a fixed-side valve body are provided. A hot and cold water mixing faucet, wherein an outflow passage is provided on a side surface of a housing for storing the water.