JP2882271B2 - Valve with disc valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve having a disc valve body, and more particularly to a disc valve body used for a single faucet, a hot-water mixing faucet, a flow switching faucet of a hot water washer for toilet bowls and other faucet equipment. The present invention relates to a valve having:

[0002]

2. Description of the Related Art A water faucet (single faucet, mixed faucet, etc.) having a pair of disc valve bodies as a flow control valve has been widely used. This flow control valve has a fixed disk valve (hereinafter simply referred to as a fixed disk) and a movable disk valve (hereinafter simply referred to as a movable disk) in which a disk surface and a cylinder axis direction are orthogonal to each other in a cylindrical valve case. Are arranged in a superimposed manner, and the discs are provided with cutouts or openings for water passage.

Hereinafter, a conventional example of such a valve will be described with reference to FIGS.

[0004] Reference numeral 1 denotes a cylindrical valve case of the valve 2, and a slit shape through which a fluid such as water, hot water or mixed water (hereinafter referred to as water) flows out as indicated by an arrow in the center of the valve case 1. Opening 3 is formed.

[0005] One end A of the valve case 1 in the axial direction is installed so as to protrude from a faucet body (not shown) to the outside. A disc-shaped movable disk 4 made of ceramic is fitted to the inside of the other end B side in the axial direction of the valve case 1 so as to slide on a fixed disk 5 and to be rotatable.

[0006] The fixed disk 5 has two substantially fan-shaped water passage holes 6 and an insertion hole 8 for a spindle 7 at the center. Further, the fixed disk 5 is provided with a concave portion 9 on a surface opposite to a sliding surface with the movable disk 4. The rotation of the fixed disk 5 is stopped by engaging the recess 9 with a projection 10 provided on the valve case 1.

The movable disk 4 has two substantially fan-shaped water passage holes 11, and a cross-shaped recess 12 into which the tip of the spindle 7 is inserted.
A cross-shaped portion 13 that fits into the recess 12 is formed at the tip of the spindle 7.

The movable disk 4 and the fixed disk 5
Are disposed in the valve case 1 such that the movable disk 4 is placed on the other end B side of the valve case 1, and an appropriate member such as a C-ring 14 engaged with the inner peripheral surface of the valve case 1. The member prevents the coming off.

The center of the spindle 7 is rotatably supported by the holder 16 on the one end A of the valve case 1. A serration groove is formed in the end of the spindle 7 so that an operation handle can be engaged with the serration groove.

The spindle 7 has a spring pin 1
7 project radially, and the spring pin 17
Is inserted into the slit 18 of the valve case 1. The slit 18 is provided over a range of about 90 ° with respect to the axis of the valve case 1, and the spindle 7 is configured to be rotatable about the axis by about 90 °.

In the valve 2 configured as described above,
When the spindle 7 is turned, the movable disk 4 is rotated, the degree of overlap between the water holes 11 of the movable disk 4 and the water holes 6 of the fixed disk 5 is changed, and switching of water discharge and water stoppage and flow rate adjustment are performed. In this case, the water passes through the movable disk 4 and the fixed disk 5 in this order from the other end B side of the valve case 1 and flows out of the opening 3.

As described above, the conventional valve 2 controls flow rate adjustment, flow path change, and the like in accordance with the state of friction between the sliding surfaces of the movable disk 4 and the fixed disk 5. Therefore, each sliding surface has to be mirror-finished in order to maintain watertightness. When such mirror-like sliding surfaces are joined together as they are, the sliding surfaces strongly adhere to each other due to intermolecular force or the like, and the operation of the operation handle becomes heavy. For this reason, conventionally, grease is applied between the sliding surface of the movable disk 4 and the sliding surface of the fixed disk 5 to facilitate the operation.

[0013]

In the valve having the above-mentioned conventional disk valve element, grease flows out or is consumed every time the movable disk 4 and the fixed disk 5 slide. In addition, since the sliding surface of the movable disk 4 and the sliding surface of the fixed disk 5 are each formed into a mirror surface as described above, the amount of grease that can be present between these sliding surfaces is very small. .

Therefore, as the cumulative frequency of use of the flow control valve 2 increases, grease flows away, and the sliding resistance between the movable disk 4 and the fixed disk 5 increases.
The movable disk 4 gradually becomes difficult to move. When the faucet device is a hot-water mixing faucet or the like, the operation of the operation handle becomes heavy. In addition, when the faucet is a flow switching tap of a hot water washer, a normal valve function cannot be obtained.

The disadvantages are that when the contact area between the movable disk 4 and the fixed disk 5 is large or when the force (for example, water pressure) that promotes the joining between the movable disk 4 and the fixed disk 5 increases, It was noticeable.

The above-mentioned movable disk 4 and fixed disk 5
The process or mechanism by which the sliding resistance between the two increases with time will be described in more detail with reference to FIG.

When the sliding surfaces of the movable disk 4 and the fixed disk 5 are microscopically observed at the beginning of use, grease is accumulated in the fine concave portions 4a and 5a as shown in FIG. 11 (A). As the number of sliding increases, FIG. 11 (B)
Grease flows out from between the disks 4 and 5, as described above, and the sliding surfaces come into direct contact with each other. This increases the sliding resistance between the movable disk and the fixed disk, and
The sliding surface is scraped off by wear, and the recesses 4a and 5a become smaller.

When foreign matter in water accumulates in the reduced recesses 4a and 5a (the state of FIG. 11 (C)) or the number of times of sliding increases, grease is generated from the sliding surface as shown in FIG. 11 (D). Almost all of them are lost, and the sliding surfaces stick together (ringing).

An object of the present invention is to solve the above-mentioned conventional problems and to provide a valve having a disc valve body for a faucet device capable of operating the handle lightly for a long period of time.

[0020]

According to the present invention, there is provided a valve having a disk valve body in which a pair of ceramic disk-shaped disk valve bodies slidably and coaxially superimposed are installed in a valve case. Valves, these disc valve bodies, a substantially fan-shaped water hole is provided in a portion between the center portion and the outer peripheral portion of the disc in the thickness direction of the disc, and one disc valve body is In a valve fixed to a valve case of the valve and the other disc valve body is rotatably arranged around an axis perpendicular to the board surface, at least one disc valve body is provided with the water passage hole in the board surface. Outer edge and / or
Or a grease filling concave portion is provided only at a position along the inner peripheral edge portion, and the grease filling concave portion is filled with grease,
A recess is provided in a portion other than the water hole of the board surface of at least one disk valve body and in a portion between the radial position of the inner peripheral edge and the radial position of the outer peripheral edge of the water flow hole, The recess is provided so as to be separated from the water hole.

[0021]

In the valve having the disc valve body of the present invention, the grease filling recess is provided only at a portion along the outer peripheral edge and / or the inner peripheral edge of the water passage hole on at least one of the disc valve disc surfaces. Therefore, a large amount of grease can be filled in the grease filling recess. Further, since the portion along the outer peripheral edge and the inner peripheral edge of the water passage hole is a non-water contact surface, the filled grease hardly flows out. Therefore, grease is
It is present between the sliding surfaces of both disk valve elements for a very long time, and the sliding resistance between the sliding surfaces of both disk valve elements is significantly reduced.

Further, a recess is formed in a portion of at least one disc valve body other than the water hole and between a radius of the inner peripheral edge and a radius of the outer peripheral edge of the water hole. Since it is provided, the sliding resistance between the sliding surfaces of both disc valve bodies is reduced.

[0023]

Embodiments will be described below with reference to the drawings. FIGS. 1 and 2 show a valve having a disk valve element according to an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which a fixed disk and a movable disk are overlapped.
FIG. 2A is a plan view of a fixed disk, FIG.
FIG. 2C is a cross-sectional view taken along line BB and CC of FIG. 2A. 6 (A) is a plan view of the movable disk, FIGS. 6 (B) and (C) are lines BB in FIG. 6 (A),
It is sectional drawing which follows CC line.

The disk-shaped fixed disk valve element 20 (fixed disk) has two substantially fan-shaped water holes 21 penetrating in the thickness direction of the disk at a portion between the center and the outer periphery of the disk. In addition, a spindle insertion hole 22 is formed at the center. The water passage hole 21 extends in the circumferential direction in a range slightly smaller than 90 °.

The grease filling recess 23 is provided only on the board surface of the fixed disk 20 along the outer peripheral edge and the inner peripheral edge of the water passage hole 21, and the grease filling concave 23 is filled with grease. .

The water holes 2 of the fixed disk 20
A concave portion 24 is provided in a portion between the radial position of the inner peripheral edge and the radial position of the outer peripheral edge of the first peripheral portion. A concave locking portion 25 is provided on the surface of the fixed disk 20 opposite to the sliding surface with the movable disk valve element (movable disk) 26.
Is engaged with the projection 10 provided on the valve case 1 to stop the rotation of the fixed disk 20.

The movable disk 26 has a pair of substantially fan-shaped water holes 27 penetrating in the thickness direction. The water passage hole 27 extends in the circumferential direction in a range slightly smaller than 90 °, and is arranged symmetrically with the center of the movable disk 26 interposed therebetween. Substantially fan-shaped shallow recesses 29, 29 are formed between the water holes 27 (in the circumferential direction).

A deep radial groove 30 is formed so as to extend through the center of the movable disk 26. At the center of the movable disk 26, a circular recess 31 is formed so as to have the same depth as the radial groove 30.

At the tip of the spindle 7A, there is provided an arm 7B extending in a direction perpendicular to the axis of the spindle 7A, and this arm 7B fits into the radial groove 30. By the fitting of the arm portion 7B and the radial groove 30,
The rotational force of the spindle 7A is transmitted to the movable disk 26.

In the valve having the disk valve element configured as described above, the grease filling recess 23 is provided only on the surface of the fixed disk 20 along the outer peripheral edge and the inner peripheral edge of the water passage hole 21. Grease filling recess 2
3 can be filled with a sufficient amount of grease.

The portion along the outer peripheral edge and the inner peripheral edge of the water passage hole 21 is a non-water contact surface, so that the filled grease hardly flows out. Therefore, grease exists between the sliding surfaces of the fixed disk 20 and the movable disk 26 for a very long time, and the sliding resistance between the sliding surfaces of the disks 20, 26 is significantly reduced.

Since the concave portion 24 is provided at a portion between the radius of the inner peripheral edge of the water passage hole 21 and the radius of the outer peripheral edge, the direct contact area between the discs 20 and 26 is small. For this reason, sliding resistance is reduced. Since the recess 24 is provided separately from the water hole 21, the water holes 21 and 27 communicate with each other through the recess 24 to prevent water leakage.

In this embodiment, the concave portion 24 is substantially fan-shaped, but may be a substantially V-shaped concave portion 24A as shown in FIGS. Also, the grease filling recess 23
Is a hemispherical shape, but may be long groove-shaped concave portions 23A and 23B as shown in FIGS. Further, the combination of the grease filling recess and the shape of the recess is not limited. In addition, the grease filling recesses are provided on both the outer peripheral edge and the inner peripheral edge of the water hole 21.
It suffices if it is provided on at least one of the outer peripheral edge and the inner peripheral edge.

In the present embodiment, the grease filling recess 23 is provided only on the fixed disk 20. However, as shown in FIG.
May be provided. In the case where the grease filling recess is provided in the movable disk, the grease filling recess may be provided on at least one of the outer peripheral edge and the inner peripheral edge of the water hole of the movable disk.

As shown in FIG. 8, a long groove-shaped recess 23D,
23E may be provided on the surface of the movable disk 26B. 7 and 8 indicate the same parts as those in FIG.

In the present invention, a grease filling recess may be provided on both the movable disk and the fixed disk.

The grease filling recess, the shape and combination of the recesses are not limited to the movable disk.

[0038]

As described above, in the valve having the disc valve of the present invention, a large amount of grease can be filled in the grease filling recess, and the filled grease does not flow out. The grease is present between the sliding surfaces of the two disk valve bodies for a very long time, and the sliding resistance between the sliding surfaces of the two disk valve bodies is reduced. In addition, the provision of the concave portion reduces the direct contact area between both disc valve bodies,
The sliding resistance between the sliding surfaces of both disc valve bodies is reduced. Since the recess is separated from the water hole, water does not leak from the water hole of one disk valve to the water hole of the other disk valve via the water hole.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a fixed disk and a movable disk are overlapped.

FIG. 2 is a plan view and a sectional view of a fixed disk.

FIG. 3 is a plan view and a sectional view of a fixed disk according to another embodiment.

FIG. 4 is a plan view and a sectional view of a fixed disk according to another embodiment.

FIG. 5 is a plan view and a sectional view of a fixed disk according to another embodiment.

FIG. 6 is a plan view and a sectional view of a movable disk 26 according to the embodiment.

FIG. 7 is a plan view and a sectional view of a movable disk 26A according to the embodiment.

FIG. 8 is a plan view and a sectional view of a movable disk 26B according to the embodiment.

FIG. 9 is a sectional view of a conventional valve having a disc valve body.

FIG. 10 is a perspective view showing a state in which a fixed disk and a movable disk according to a conventional example are overlapped.

FIG. 11 is a cross-sectional view showing a temporal change of a sliding surface between a fixed disk and a movable disk according to a conventional example.

[Explanation of symbols]

7A Spindle 20, 20A, 20B Fixed disk 21, 27 Water hole 23, 23A, 23B, 23C, 23D, 23E Grease filling recess 24, 24A, 29 Recess 26, 26A, 26B Movable disk

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-347076 (JP, A) JP-A-62-183175 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16K 3/00-3/36

Claims (1)

(57) [Claims] 1. A valve comprising a pair of ceramic disc-shaped disc valve bodies slidably and coaxially superposed on each other in a valve case, and these disc valve bodies are arranged at the center of the disc. A substantially fan-shaped water passage hole is provided in a portion between the portion and the outer peripheral portion in the thickness direction of the disk, one disc valve body is fixed to a valve case of the valve, and the other disc valve body is A valve which is rotatably arranged around an axis perpendicular to the board surface, wherein at least one disc valve body is provided only on a portion of the board surface along an outer peripheral edge and / or an inner peripheral edge of the water passage hole. A grease filling concave portion is provided, and the grease filling concave portion is filled with grease, and at least a portion of the board surface of the disc valve body other than the water passage hole and an inner peripheral edge of the water passage hole. Between the radius and the radius of the outer rim A valve having a disc valve body, wherein a concave portion is provided in a portion, and the concave portion is installed separately from the water passage hole.