JPS6227308B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to faucets, and particularly to prevention of noise generated when a valve begins to open and ends to close.

(Prior Art) Conventionally, a device disclosed in Japanese Patent Publication No. 51-19178, shown in FIGS. 14 and 15, is known as a device for preventing noise generated at the beginning of opening and the end of closing of a valve.

To explain what is shown in FIGS. 14 and 15, (a) a hole that has a substantially flat bottom wall and opens upward, and an inlet 100 that opens in the bottom wall and is offset from the axis of the hole. and an outlet 101 provided in a cylindrical wall; (b) a substantially flat bottom surface and an inlet passage 102 opening from the bottom surface and offset from the axis of rotation of the body A; and said outlet 101 of the body A.
It has a discharge passageway 103 that extends laterally and communicates with the inlet passage 103 of the main body A, and is rotatable within the hole, and by rotation, the inlet passageway 102 of the main body A is connected to the inlet passage 103 of the main body A.
(c) a valve-acting member 104 that is aligned with 0 and can be brought into a state where the alignment is out of alignment; a passage forming portion forming a narrow passage 105;
Water must flow from the discharge passage 103 of the valving piece 104 through the narrow passage 105 to the outlet 101 of the body A even when the valve is only partially aligned with the inlet 100 of the body A. The inlet passage 102 and discharge passage 103 of the valve actuating piece 104 and the inlet 100 and outlet 101 of the main body A are arranged relative to each other so that back pressure is exerted on the valve portion except when the valve is fully opened. It is something to do.

However, this device can only discharge a certain amount of water that is regulated in a narrow passage during a certain period of time from the start of opening the valve and a certain period of time near the closing of the valve, and furthermore, the valve can only be discharged from a fully closed position to a fully open position. To fully close, the valve action piece must be rotated 180 degrees.
Poor operability and difficult to use.

(Problems to be Solved by the Invention) The problems to be solved by the present invention are that the valve can be operated from fully closed to fully open and from fully open to fully closed by rotating the valve 90 degrees, and the entire process of the operation is The purpose is to make it possible to gradually increase or decrease the discharge amount depending on the situation, and to further increase the silencing effect.

(Means for Solving the Problems) The technical means taken by the present invention to solve the above-mentioned problems are a fixed plate having inflow holes drilled in the thickness direction, and a watertight and rotary sliding plate on the fixed plate. A valve element consisting of a movable plate movably stacked on top of each other and having a recessed part for opening and closing the inflow hole extending from the sliding surface to the circumferential surface thereof, and a cylindrical part that accommodates the valve element, A cartridge case in which a slit-like passage extending circumferentially is bored in the circumferential surface of a cylindrical part, and a tip is provided around the cylindrical part of the cartridge case with a slight gap between the cylindrical part and the cylindrical part. The inflow hole and the recessed part are provided in two pieces symmetrically on the left and right sides of the center line of the fixed plate and the movable plate, respectively, and have a shape that expands from the center direction toward the peripheral edge. The slit-like passage is located at a position 2 corresponding to each concave notch when the inflow hole and the concave notch are completely aligned.
A first constriction part is formed at a location with approximately the same length as the recessed part on the circumferential surface of the movable plate, and the first constricted part is formed with the recessed part of the movable plate, and the tip opening of the cylindrical member is formed in the cylinder of the cartridge case. A second cylindrical portion is formed adjacent to the cylindrical portion.
It forms a constriction part.

(Function) According to the above technical means of the present invention, in the process of rotating the movable plate to open the valve, the flow path is throttled by the first throttle part and the second throttle part, and the valve part However, as the degree of alignment between the inlet and the recessed portion increases from the valve open state, the degree of alignment between the recessed portion and the slit-shaped passage also increases, and the discharge amount gradually increases. It becomes fully open by rotating 90 degrees.

(Example) Hereinafter, the present invention will be described in detail based on illustrated examples.

In the figure, the main body has a discharge port in the center and valves at both ends, and the valves at both ends adjust the flow rates of cold water and hot water, respectively, and discharge hot water at a desired temperature from the discharge ports. This figure shows a so-called two-valve hot water mixing faucet, where A is the main body and 1 is the discharge port provided in the center.

In the main body A, an inlet passage 3 communicating with the passage inlet 2 and an outlet passage 4 communicating with the discharge outlet 1 are defined by a partition wall 5, and both passages 3 and 4 are separated by the partition wall 5.
They communicate with each other through a communication hole 6 provided in the.

Although only the cold water inflow path 3 is shown in the drawings, a hot water inflow path is provided in the main body A symmetrically to the cold water inflow path 3 via a partition wall 5'.

In addition, the flow hole 6 of the partition wall 5 is located on the outflow passage 4 side of the main body A.
An opening 7 is opened opposite to the opening 7, and a screw 8 is formed on the inner peripheral surface of the opening end. 9 is a cartridge case consisting of a disc part 11 having a spindle insertion hole 10 in the center, and a cylindrical part 12 having a smaller diameter than the disc part 11 integrally formed at the tip thereof;
A spindle guide 13 is formed protrudingly along the edge of the spindle insertion hole 10 on the surface of the disk portion 11 opposite to the cylindrical portion 12, and a slit-shaped passage passing through the circumferential surface of the cylindrical portion 12 is formed. 14 are provided at two locations opposite to each other along the circumferential direction.

Then, this cartridge case 9 is fitted and inserted into the opening 7 of the main body A, and the cylindrical part 12 extends into the main body A, and its tip abuts against the partition wall 5 so as to surround the communication hole 6, and the partition wall 5 and a presser screw 15 screwed into the opening 7.

Further, the cartridge case 9 has a protruding piece 16 that protrudes outward from the disc portion 11, and this protrusion piece 16 engages with a notch portion 17 formed by cutting out the open end of the opening 7, thereby preventing rotation.

18 and 19 are both ceramic (alumina oxide,
The fixed plate and the movable plate are formed into a disc shape with approximately the same diameter as the inner diameter of the cylindrical part 12 of the cartridge case 9, using a highly wear-resistant material such as Al ₂ O ₃ ), sintered metal, or hard alloy. The two are superposed watertightly and rotatably and slidably to form the cylindrical portion 1 of the cartridge case 9.
It is housed in 2.

The front surface of the fixed plate 18 is in close contact with the annular packing 20 fitted into the opening of the cylindrical part 12, and the movable plate 19 has a concave groove 33 on the back surface inserted through the spindle insertion hole 10, and one end thereof is integrally fixed to the handle 23. spindle 2
1 is engaged with the protrusion 34 at the other end. The annular packing 20 has a large diameter portion 35 so that it can be removed integrally with the cartridge case 9 when the cartridge case 9 is removed from the main body A.

The fixing plate 18 has two inflow holes 22 bored through it in the thickness direction. They are formed into an open fan shape and are located symmetrically.

An engaging portion 26 is provided on the side circumference of the fixing plate 18, and the engaging portion 26 engages with an engaging groove (not shown) provided in the cylindrical portion 12, so that the fixing plate 18
is positioned so that the slit-like passage 14 of the cylindrical portion 12 is located in the expanding direction of the inflow hole 22, and is prevented from rotating.

The movable plate 19 can rotate and slide on the back side of the fixed plate 18 by rotating a handle 23 provided at the outer end of the spindle 21, and connects the inlet hole 22 of the fixed plate 18 with the slit-shaped passage 14 of the cartridge case 9. The recessed notch 24 extends from the sliding surface of the movable plate 19 to the fixed plate 18 to the peripheral surface of the slit-shaped passage 14 of the cartridge case 9.
It is formed as if it has been gouged out with a depth greater than the width of. Further, like the inflow hole 22 described above, the two recessed notches 24 are formed in a shape that expands at the same angle on the left and right sides of the center line, and are provided in two symmetrically.

The opening angle of this concave notch 24 is the same as that of the inflow hole 22, but it starts expanding from a position closer to the center than the inflow hole 22, and its length at the peripheral surface is similar to the slit shape of the cartridge case 9. Passage 14
It is approximately the same length as . Therefore, the concave cutout 24 completely opens the inflow hole 22 and the passage 14 during a certain period of rotation of the movable plate 19.

Then, by rotating the handle 23, the movable plate 19
If the inlet hole 22 of the fixing plate 18 is opened by rotating the concave notch 24, the inlet passage 3 and the outlet passage 4 are opened.
are communicated through the inflow hole 22 of the fixed plate 18, the recessed part 24 of the movable plate 19, and the slit-like passage 14 of the cartridge case 9, and cold or hot water flowing into the main body A from the flow passage inlet 2 is discharged. It is discharged from the outlet.

By performing this operation on both the cold water flow path side and the hot water flow path side, cold water and hot water can be mixed and discharged.

Further, when the movable plate 19 is rotated to close the inflow hole 22 of the fixed plate 18 with the sliding surface of the movable plate 19, the inflow path 3 and the outflow path 4 are blocked, and the discharge is stopped.

That is, the fixed plate 18 and the movable plate 19 are valve elements that constitute the valve a.

The discharge amount and the temperature of the mixed water are adjusted by adjusting the valve openings on the water side and the hot water side.

That is, as shown in FIG. 3, the inlet hole 2 of the fixed plate 18
2 and the concave notch 24 of the movable plate 19 completely match, the valve a is fully open and the amount of water discharged is maximum. At this time, the slit-shaped passage 14 and the recessed part 24 of the movable plate 19 also completely match, and the slit-shaped passage 14 is also fully opened.

Next, when the movable plate 19 is rotated and the recessed part 24 is aligned with only a part of the inflow hole 22 as shown in FIG. 4, for example, when it is aligned with only about half of the inflow hole 22 as shown in the drawing. That is, when approximately half of the inflow hole 22 is closed by the sliding surface of the movable plate 19, the valve a is in a half-open state, and the amount of water discharged is reduced by half compared to the state shown in FIG. At this time, approximately half of the opening area of the slit-like passage 14 is aligned with the recessed notch 24 of the movable plate 19, but the remaining approximately half is closed by the circumferential surface of the movable plate 19.

Furthermore, when the movable plate 19 is rotated to close most of the inflow hole 22 with the sliding surface of the movable plate 19 as shown in FIG. 5, the valve a is almost closed and only a small amount of water can be spouted. At this time, a small portion of the slit-like passage 14 also aligns with the recessed part 24 of the movable plate 19, but
Most of it is covered by the circumferential surface of the movable plate 19.

Further, by rotating the movable plate 19, the recessed part 24 is completely removed from the inflow hole 22 as shown in FIG.
2 is completely blocked by the sliding surface of the movable plate 19, the valve a is completely closed and the discharge stops.

At this time, the slit-like passage 14 is connected to the movable plate 19.
Even if a small gap remains, the water will not flow out because the inlet hole 22 is completely closed. As understood from the above operation, the slit-like passage 14 and the recessed part 24 of the movable plate 19 constitute the first constricted part b.

By performing this operation separately for the water side and the hot water side, the temperature of the mixed water can be freely adjusted.

The relationship between the opening area of the valve a and the opening area of the throttle part b during the opening and closing operations of the valve is shown in a graph as shown in FIG. That is, the opening area of the first throttle part b changes in accordance with the opening area of the valve A, and is smaller than the opening area of the valve A, and because it applies back pressure to the primary side, the speed of the hot water is reduced. , cavitation that occurs when passing through valve A can be suppressed, and noise can be suppressed.

On the other hand, 25 in the figure is a cylindrical member formed in a cylindrical shape, and the flange 32 provided at one end is sandwiched between the disc part 11 of the cartridge case 9 and the stepped part 27 provided in the main body A. It is equipped so as to surround the outside with an appropriate gap, and its tip opening 28 is close to the cylindrical part 12 and further narrows the flow path downstream of the first constriction part b. This makes the silencing effect of part b even more reliable.

That is, the tip opening 28 of the cylindrical member 25 and the cylindrical portion 12 of the cartridge case 9 constitute the second constricted portion c.

In addition, 29 is a slip washer, and 30 is a pin protruding from the spindle 21. This pin 30 engages with a stopper 31 formed in a notch in the spindle guide 13 of the cartridge case 9, and the spindle 21 and, by extension, the movable plate 19. Regulate the rotation angle.

It goes without saying that the present invention can be implemented not only in a two-valve hot/cold mixer faucet as in the embodiment described above, but also in a single faucet that discharges only hot water or water. .

(Effects) Since the present invention has the above configuration, it has the following advantages.

(1) The first constriction is formed by the recessed part of the movable plate of the valve element housed in the cartridge case and the slit-shaped passage opened on the circumferential surface of the cartridge case, so when the valve is opened, the first constriction part is Since back pressure is applied and the speed of hot water or water is reduced when it passes through the valve, that is, when it flows in from the inflow hole, the occurrence of cavitation when hot water or water passes through the valve can be suppressed. Therefore, the noise generated when hot water passes through the valve portion can be reduced.

(2) A cylindrical member is provided surrounding the cylindrical part of the cartridge case, and the tip opening of the cylindrical member is located downstream of the first constriction section formed by the slit-like passage of the cylindrical part and the recessed part of the movable plate. Since the second throttle part is formed by the part and the cylindrical part of the cartridge case, in addition to muffling the sound by the action of the first throttle part as described above, the sound can be further silenced by the second throttle part. become more complete.

(3) Two inflow holes in the fixed plate and two concave notches in the movable plate are provided symmetrically on the left and right sides of the center line of the fixed plate and the movable plate, respectively, and each expands from the center toward the periphery. The slit-like passageway, which has a shape and forms a first constriction part with the recessed part of the movable plate, is located at two positions corresponding to each recessed part when the inflow hole and the recessed part are completely aligned. Since the length is approximately the same as the length of the recessed part on the circumferential surface of the movable plate, it is possible to operate the valve from fully closed to fully open, and from fully open to fully closed, by rotating the movable plate by 90 degrees. The flow path area changes in accordance with the opening area of the inlet hole immediately after the valve is opened, and the discharge amount increases or decreases according to the rotation angle of the movable plate from immediately after the valve opens in the valve opening process to just before closing in the valve closing process. is obtained, and the flow rate is not restricted too much.

Therefore, it is easy to operate and convenient to use.

[Brief explanation of the drawing]

The drawings show an embodiment of the faucet of the present invention, and FIG. 1 is a front view with main parts cut away. Figure 2 is an enlarged longitudinal sectional front view of the main part, Figures 3 to 6 are Figure 1 XX
The operating state is shown in an enlarged vertical side view along the line. Fig. 7 is an enlarged longitudinal sectional front view of the movable plate, Fig. 8 is a bottom view thereof, Fig. 9 is an enlarged longitudinal sectional front view of the fixed plate, Fig. 10 is a bottom view thereof, and Fig. 11 is a front view of the cartridge case. , FIG. 12 is a plan view of the same, FIG. 13 is a graph showing the relationship between the opening area of the valve and the opening area of the throttle part, FIG. 14 is a cross-sectional view of the conventional example showing the valve open state, and FIG. The figure is a cross-sectional view taken along the line -- in FIG. 14, showing the valve in the closed state. a...Valve, b...First constriction part, c...Second constriction part, 9...Cartridge case, 14...Slit-shaped passage, 18
...fixed plate, 19...movable plate, 22...inflow hole, 24...
concave cutout, 25...cylindrical member;

Claims (1)

[Claims] 1 A fixed plate with an inflow hole bored in the thickness direction, and a concave notch that is superimposed on the fixed plate in a watertight and rotationally slidable manner and extends from the sliding surface to the circumferential surface to open and close the inflow hole. A cartridge case having a cylindrical part for accommodating the valve element and having a slit-like passage extending in the circumferential direction on the circumferential surface of the cylindrical part, and a cylindrical shape of the cartridge case. A cylindrical member is provided around the part with a slight gap between it and the cylindrical part and has an open tip, and the inflow hole and the recessed part are located on the left and right sides of the center line of the fixed plate and the movable plate, respectively. Two symmetrical passages are provided, each with a shape that expands from the center toward the periphery, and a slit-like passage is provided in each recess when the inflow hole and the recess are completely aligned. A first constriction is formed at two corresponding positions to have approximately the same length as the concave notch on the circumferential surface of the movable plate, and a first constriction is formed by the concave notch on the movable plate, and the tip opening of the cylindrical member is formed with a curved part. A faucet characterized in that a second constriction portion is formed in close proximity to the cylindrical portion of the toilet case and together with the cylindrical portion.