JP2785577B2 - Fixed valve disc - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed valve disc used in a hot and cold water mixing faucet, and more particularly to a fixed valve disc which can be easily dimensionally controlled and can be manufactured at low cost.

[0002]

2. Description of the Related Art In a hot and cold water mixing faucet for mixing and discharging hot water and water at an appropriate temperature, a movable valve is mounted on a fixed valve disk provided with a plurality of openings through which hot water, water and mixed water flow. 2. Description of the Related Art In many cases, discs are overlapped with each other in a watertight manner and slidably in a rotating and radial direction, and a movable valve disc is slid by operating a handle lever connected thereto.

[0003] As this fixed valve disc,
Ceramics excellent in water tightness, slidability and wear resistance are used.

[0004] The fixed valve disc must be fixedly arranged in the hot and cold water mixing faucet. As a fixing method, conventionally, a notch is provided on the outer peripheral edge of the fixed valve disc,
Means has been adopted in which a projection provided on the inner wall surface or the like of the casing in which the fixed valve disk is disposed and housed is engaged with the notch.

For example, in a mixing faucet disclosed in Japanese Utility Model Laid-Open Publication No. Sho 63-48068, two cutouts are provided on the outer peripheral side surface of a fixed valve disc, and the cutouts are accommodated in the fixed valve disc. The valve disc is fixed by engaging with a projection provided on the inner wall of the cartridge casing.

In the mixing faucet described in Japanese Utility Model Laid-Open Publication No. 3-44277, three cutouts are provided on the outer peripheral side surface of the fixed valve disc. The valve disc is fixed by engaging with a projection provided on the inner wall.

[0007] If the fixed valve disc moves during use, accurate sliding operation with the movable valve disc cannot be realized, resulting in insufficient water discharge or water leakage. For this reason, the fixed valve disc needs to be firmly fixed so as not to cause backlash.

[0008]

However, as in the above-mentioned conventional example, the method of positioning and fixing the valve disk by the mutual relationship of a plurality of notches provided on the outer peripheral side surface of the fixed valve disk is not described. In order to obtain an accurate and strong fixed state, it is necessary to strictly control the dimensions of a plurality of notches serving as a reference for the positioning. For this reason, there was a problem that the manufacturing cost of the fixed valve disk was increased.

In particular, when the fixed valve disc is made of a ceramic material, a large dimensional shrinkage of about 10 to 20% occurs during the firing process of the ceramic, so that the dimensional control becomes more difficult. In order to obtain it, there is a problem that a complicated manufacturing process and a high manufacturing cost are required.

Further, when the dimension width to be dimensionally controlled is large, for example, the shrinkage in the firing process is not uniform and the dimension between the plurality of notches is kept within the tolerance range, good dimensional accuracy is obtained. There was a problem that it was more difficult.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above points, and has as its object to provide a fixed valve disc which can be easily dimensionally controlled and can reduce the manufacturing cost.

[0012]

In order to achieve the above object, a fixed valve disk according to the present invention comprises a sliding flat portion on which a movable valve disk abuts and slides, and a side opposed to the sliding flat portion. And a side surface portion formed between the sliding flat portion and the bottom surface portion in a direction intersecting with the sliding flat portion and the bottom surface portion, and a water passage hole is provided through the sliding flat portion. A positioning hole is formed on the bottom surface in a direction perpendicular to the sliding plane on a surface inside the contour of the bottom, and two mutually parallel positioning surfaces are formed on the side surface. It is characterized by being formed orthogonal to the portion.

[0013]

According to the fixed valve disk constructed as described above, the positioning of the fixed valve disk in the radial direction is performed by the circular hole, and the positioning in the rotational direction is performed by the two parallel plane portions. As described above, since the positioning in the radial direction and the positioning in the rotational direction are performed by independent means (a circular hole and two parallel plane portions), dimensional management may be performed independently for each means. There is no need to perform positional dimension management between the two parallel plane portions.

Therefore, the dimensional control of the circular hole and the two parallel plane portions is easy, and a fixed valve disk with high dimensional accuracy can be manufactured at low cost.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a fixed valve disc 1 according to the invention.
FIG. 3 is an exploded perspective view showing an example of a valve cartridge 20 of a hot and cold water mixing faucet where 0 is used.

The valve cartridge 20 includes a cartridge case 30 having a substantially cylindrical shape, a movable valve disk 40, a fixed valve disk 10, and a valve disk holder on which the fixed valve disk 10 is fixedly held. 50.

In the cartridge case 30, a cross joint 32 having a leg 31 inserted into an opening 41 formed in the center of the movable valve disc 40 is disposed so as to be rotatable and swingable in the radial direction. A lever (not shown) for operating the mixing faucet is connected to the cross joint 32.

The movable valve disk 40 has a substantially disk shape, a sliding flat surface portion 42 is formed on the lower surface, and an outflow portion 43 is provided by cutting off a part of the peripheral edge.

As shown in FIGS. 1 and 2, the fixed valve disk 10 has a larger diameter than the movable valve disk 40, and the sliding flat portion 42 of the movable valve disk 40 slides on the fixed valve disk. It has a sliding flat portion 11 and a bottom portion 12 formed on a side facing the sliding flat portion 11. A side surface portion 13 is formed between the sliding flat surface portion 11 and the bottom surface portion 12 in a direction crossing the sliding flat surface portion 11 and the bottom surface portion 12.

The sliding flat portion 11 is provided with a water inflow hole 14, a hot water inflow hole 15, and a mixed hot water inflow hole 16 therethrough. In the bottom portion 12, a circular small-diameter positioning hole 17 is provided in the surface portion inside the contour of the bottom portion 12 so as to penetrate to the sliding flat portion 11.

The side surface portion 13 is formed with two parallel positioning surface portions 18a and 18b orthogonal to the sliding flat surface portion 11 by partially cutting out the side surface portion 13.

The valve disk holder 50 has a substantially flat shape having a pair of projections 51 that engage with the notches 33 formed at the lower end of the cartridge case 30. The fixed valve disk 10 is mounted on the valve disk holder 50.
Water inlet 14, hot water inlet 15 and mixed hot water inlet 1
6, a water inflow hole 52, a hot water inflow hole 53, and a mixed hot water inflow hole 54 are provided.

The valve disk holder 50 has two mutually parallel surface portions 55 orthogonal to the plane portion of the holder.
A pair of protrusions 55 on which a and 55b are formed are provided upward. The distance between the two parallel plane portions 55a and 55b of the pair of projections 55 is 2
The distance between the two positioning surfaces 18a, 18b is the same as the distance between them.

The valve disk holder 50 is provided with a small columnar projection 56 extending perpendicularly to the plane of the holder. The diameter of the projection 56 is the same as the diameter of the positioning hole 17 of the fixed valve disc 10.

The fixed valve disk 10 is disposed on the valve disk holder 50 so as to be superimposed thereon, and the two positioning surfaces 18a and 18b are connected to the two parallel surfaces 55a and 55.
b fixed valve disc 10
Is positioned in the rotation direction. Further, the positioning of the fixed valve disk 10 in the radial direction is performed by fitting the positioning hole 17 into the projection 56. In this way, the fixed valve disc 10 is accurately and firmly fixed on the valve disc holder 50.

The movable valve disc 40 is attached to the leg 31 of the cross joint 32 via a cover plate 60.

Subsequently, the valve disc holder 20 is assembled to the lower end of the cartridge case 30 by engaging the notch 33 and the projection 51 with each other, whereby the valve cartridge 20 is assembled.

In the valve cartridge 20 assembled in this manner, since the fixed valve disc 10 is accurately and firmly fixed, the movable valve disc 40 is brought into contact with the fixed valve disc 10 and slides. However, the fixed valve disc 10 does not rattle, and a good discharge action of the hot and cold water mixing faucet can be obtained.

The fixed valve disc 10 according to the present embodiment
Uses a positioning hole 17 and two positioning surface portions 18a and 18b as positioning and fixing means, and the positioning hole 17 functions as a means for restricting the movement of the fixed valve disc 10 in the radial direction. 18
a, 18b function as means for restricting the movement of the fixed valve disc 10 in the rotational direction. Therefore, when manufacturing the fixed valve disc 10, the positioning holes 17 are required.
The size management may be performed independently for each of the two positioning surfaces 18a and 18b. That is, the positioning hole 17 may be manufactured so that the inner diameter thereof is within the tolerance range in relation to the projection 56 inserted into the positioning hole 17, and the two positioning surface portions 18a and 18b are
In view of the relationship between the two parallel surface portions 55a and 55b that sandwich the same, it is only necessary to manufacture such that the distance between them is within the tolerance range.

Therefore, the dimensional control is extremely easy as compared with the conventional dimensional control such that the relative positions of the two positioning means are also within the dimensional tolerance range. In particular, since the positioning hole 17 has a small diameter, shrinkage deformation is small, and good dimensional accuracy can be obtained.

The means for fixing the position of the fixed valve disc is separated into a radial position restricting means and a rotational position restricting means, and a small circular hole is formed as a radial position restricting means. As a method of using two parallel plane portions as means, various modes can be adopted as described below in addition to the above-described embodiment.

FIGS. 3 and 4 show a fixed valve disc according to a second embodiment of the present invention.

In the fixed valve disc 110, the positioning circular hole 117 is a recessed hole formed in the bottom surface 112, and does not penetrate to the sliding flat surface 111. Also, two parallel surface portions 118a, 11
8b is provided on the side surface portion 113 as in the above-described embodiment. By doing so, the fixed valve disc 11
0 can increase the effective sliding plane portion.

FIGS. 5 and 6 show a fixed valve disc according to a third embodiment of the present invention.

In the fixed valve disc 120, two parallel surface portions 128a and 128b are formed on the bottom portion 122. Also a circular hole 1 for positioning
27 is provided substantially through the center of the fixed valve disk 120.

FIGS. 7 and 8 show a fixed valve disc according to a fourth embodiment of the present invention.

In this fixed valve disk 130, two parallel surface portions 138a and 138b are provided on a projection 139 projecting downward from the bottom surface 132. Further, the positioning circular hole 137 is provided to penetrate substantially the center of the fixed valve disc 130.
In this embodiment, the protrusion 139 is a groove (not shown) having two parallel surfaces provided on the valve disk holder.
To be positioned and fixed in the rotational direction.

FIGS. 9 and 10 show a fixed valve disc according to a fifth embodiment of the present invention.

In the fixed valve disc 140, two parallel surface portions 148a and 148b are provided in a radially extending groove 149 provided in the bottom surface portion 142. Further, the positioning hole 147 is provided to penetrate substantially at the center of the fixed valve disk 140. In this embodiment, a protrusion (not shown) having two parallel surfaces provided on the valve disk holder is provided in the groove 1.
49, it is positioned in the rotational direction.

FIGS. 11 and 12 show a fixed valve disk according to a sixth embodiment of the present invention.

In the fixed valve disk 150, two parallel surface portions 158a and 159b are provided in an opening 159 whose bottom surface portion 152 penetrates through the sliding flat surface portion 151. Also, a circular hole 157 for positioning is used.
Is provided substantially through the center of the fixed valve disk 150. In this embodiment, a projection (not shown) having two parallel surfaces provided on the valve disc holder is provided.
Is inserted and positioning in the rotational direction is performed.

FIGS. 13 and 14 show a fixed valve disc according to a seventh embodiment of the present invention.

In the fixed valve disc 160, a circular recess 167 for positioning is formed in the bottom portion 162.
And a concave portion 169 having two parallel surface portions 168a and 168b. In this embodiment, a columnar projection (not shown) provided on the valve disk holder
Are inserted into the recessed holes 167, and projections (not shown) having two parallel planes are inserted into the recesses 169, thereby performing positioning in the radial direction and the rotation direction. According to this embodiment, the effective area of the sliding flat portion 161 can be increased.

FIGS. 15 and 16 show a fixed valve disc according to an eighth embodiment of the present invention.

In the fixed valve disk 170, the elongated hole 1 having two parallel surface portions 178a and 178b penetrating from the bottom surface portion 172 to the sliding flat surface portion 171.
79 are formed. In addition, a circular hole 17 for positioning is used.
7 is provided through substantially the center of the fixed valve disk 170.

FIGS. 17 and 18 show a fixed valve disc according to a ninth embodiment of the present invention.

In this fixed valve disk 180, a cutout portion 189 having two parallel surface portions 188a and 188b is formed inward from the side surface portion 183. The circular hole 187 for positioning is
The fixed valve disk 180 is provided substantially at the center thereof so as to pass therethrough. In this embodiment, a protrusion (not shown) having two parallel surfaces protruding in the radial direction and provided on the valve disc holder is inserted into the notch 189 to perform positioning in the rotation direction. .

FIGS. 19 and 20 show a fixed valve disc according to a tenth embodiment of the present invention.

In this fixed valve disc 190, two parallel surface portions 198a are formed on the side surface portion 193.
A projection 199 having 198b is provided. In addition, a circular hole 197 for positioning is provided substantially through the center of the fixed valve disc 190. In this embodiment, the protrusion 199 is inserted into a concave groove (not shown) having two parallel surfaces provided on the valve disk holder, and positioning in the rotational direction is performed.

According to the various embodiments described above, since the position restricting means in the radial direction and the rotational direction are independent of each other, the dimensional control of each position restricting means can be performed independently. Is easy. In particular, when ceramics are used, shrinkage deformation during firing becomes a problem. However, since a circular hole is used as the radial position regulating means, the influence can be greatly reduced.

In the present embodiment, the fixed valve disc used in the hot and cold water mixing faucet has been described. However, the present invention is also applicable to a shower / curan passage switching faucet for a bathroom, a shampoo or a kitchen rectifier. The present invention can be similarly applied to a disc-type valve for opening / closing and distributing a plurality of passages by rotating / advancing / retreating (radially) moving operation of a movable valve disc such as a spray passage switching tap.
The same effect can be obtained with a valve disc other than ceramics, for example, a fixed valve made of synthetic resin.

[0053]

As described above, according to the present invention,
Since the production size management of the position regulating means in the rotation direction and the radial direction (forward / backward direction) of the fixed valve disk can be performed independently, the size management is easy. As a result, a fixed valve disc that has good dimensional accuracy and can be firmly fixed can be obtained at low cost.

In particular, the present invention has a remarkable effect when employed in a ceramic fixed valve disk which has a large dimensional shrinkage during the manufacturing process.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a valve cartridge of a hot and cold water mixing faucet to which a fixed valve disc according to the present invention is applied.

FIG. 2 is a cross-sectional view of the fixed valve disc, taken along the line II-II of FIG.
Line sectional view.

FIG. 3 is a perspective view showing a second embodiment of the fixed valve disc according to the present invention.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;

FIG. 5 is a view corresponding to FIG. 3, showing a third embodiment of the present invention.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a view corresponding to FIG. 3, showing a fourth embodiment of the present invention.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7;

FIG. 9 is a view corresponding to FIG. 3, showing a fifth embodiment of the present invention.

FIG. 10 is a sectional view taken along line XX of FIG. 9;

FIG. 11 is a view corresponding to FIG. 3, showing a sixth embodiment of the present invention.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 11;

FIG. 13 is a view corresponding to FIG. 3, showing a seventh embodiment of the present invention.

FIG. 14 is a sectional view taken along line XIV-XIV in FIG. 13;

FIG. 15 is a view corresponding to FIG. 3, showing an eighth embodiment of the present invention.

FIG. 16 is a sectional view taken along line XVI-XVI in FIG. 15;

FIG. 17 is a view corresponding to FIG. 3, showing a ninth embodiment of the present invention.

FIG. 18 is a sectional view taken along line XVIII-XVIII in FIG. 17;

FIG. 19 is a view corresponding to FIG. 3 showing a tenth embodiment of the present invention.

20 is a sectional view taken along line XX-XX in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Fixed valve disk 11 Sliding plane part 12 Bottom part 13 Side part 14 Water inflow hole 15 Hot water inflow hole 16 Mixed hot water inflow hole 17 Circular hole 18a, 18b Parallel surface part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-263952 (JP, A) JP-A-61-130683 (JP, A) JP-A-2-35277 (JP, A) 147470 (JP, U) Japanese Utility Model 2-31963 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16K 11/06 F16K 3/02

Claims (1)

(57) [Claims] 1. A sliding flat portion on which a movable valve disk slides in contact, a bottom portion formed on a side opposite to the sliding flat portion, and between the sliding flat portion and the bottom portion. And a side surface portion formed in a direction intersecting these. A water passage hole is provided through the sliding flat surface portion, and a positioning hole is provided on the bottom surface portion with a contour line of the bottom surface portion. A fixed valve disc formed on a more inner surface in a direction perpendicular to the sliding plane portion, and two parallel positioning surfaces on the side surface perpendicular to the sliding plane portion.