JPS6352268B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention includes a fixed plate in which hot water inflow holes, cold water inflow holes, and mixed water outflow holes are formed, and a fixed plate that is superimposed on the fixed plate in a watertight and slidable manner. The present invention relates to a hot water mixing faucet in which a valve is constituted by a rotary plate having a recessed portion formed on the sliding surface to connect either or both of the hot water inflow hole and the cold water inflow hole to the mixed water outflow hole.

<Conventional technology> Conventionally, this type of hot water mixing faucet was developed in 1973.
As disclosed in Japanese Patent No. 92235, the hot water inlet hole and the cold water inlet hole of the fixed plate are formed in a circular shape at axisymmetric positions with respect to the center of the fixed plate, and the recessed part of the rotary plate is provided with respective holes at opposing positions on both sides. A pair of water supply ports are formed, each consisting of a maximum diameter portion having the same diameter as the inflow hole, and a tapered portion that becomes narrower in width as it goes in the direction of rotation of the rotating plate. By aligning the tip of the tapering part of the other water inlet with the other inlet when the maximum diameter part of the water inlet is aligned with one of the inlets, the matching area can be maintained regardless of the rotation angle of the rotating plate in the mixing area. There is one in which the sum of is kept approximately constant.

<Problems to be Solved by the Invention> However, in such conventional hot and cold water mixing faucets, the gradually narrowing part that gradually narrows in one direction matches the circular inflow hole, so the temperature of the mixed water does not change. Although it is possible to keep the amount of mixed water nearly constant regardless of the adjustment, there is a problem in that designing and fabricating the gradually decreasing portion becomes extremely difficult in order to keep it completely constant.

In addition, in order to make fine adjustment of the mixed water possible, it is conceivable to extend the gradually decreasing part in the direction of rotation of the rotary plate to widen the temperature adjustment range, but in this case, even if the temperature of the mixed water is not adjusted, There is a problem in that it becomes difficult to design and process the gradually decreasing part in order to keep the amount of mixed water constant.

SUMMARY OF THE INVENTION In view of the conventional circumstances, it is an object of the present invention to change only the mixing ratio without changing the amount of mixed water with a simple configuration in the mixing region, and to widen the temperature adjustment range.

<Means for Solving the Problems> The technical means taken by the present invention to solve the above problems is to form each inflow hole of the fixed plate with the same central angle and radius around the center of the fixed plate. Formed in a shape surrounded by different large arcs and small arcs and two straight lines whose extension lines intersect at the center of the fixed plate,
The concave portion of the rotary plate has an intermediate arc having the same central angle as the center angle of each inlet hole and a radius intermediate between the large arc and the small arc, and a sector-shaped concave portion that simultaneously aligns with both inlet holes when overlapped with the fixed plate. It is characterized by forming a pair of circular arc portions and fan-shaped protruding portions that are connected to the mixed water outflow hole side of the circular arc portion and have circular arcs that are the same as the central angle of each inflow hole and have the same radius as the large circular arc. That is.

<Function> The function of the present invention is that as the rotating plate rotates, the fan-shaped protrusion of the concave portion overlaps each inflow hole and the area changes to adjust the flow rate of cold water or hot water. The area of each hole changes in inverse proportion to adjust the flow rate of cold water and hot water by sequentially overlapping the holes.

<Examples> The present invention will be described in detail below based on illustrated examples.

In the figure, B is the mixing faucet main body, and C is its functional chamber. On the bottom of the functional chamber C, there is a hot water hole 7 that connects to the hot water flow path 6, and a cold water hole 9 that connects to the cold water flow path 8. , mixed water holes 11 communicating with the mixed water outlet 10 are opened so as to constitute each vertex of the triangle, and the hot water holes 7 and the cold water holes 9 correspond to both ends of the base of the triangle. is in a position to do so.

Further, the functional chamber C is open at the top, and the rotating lid 12 is attached to this opening.

Further, in the functional chamber C, a bottomed cylindrical cartridge case 13 with an open top is provided, and an internal screw 14 on the inner peripheral surface of the functional chamber C is attached to the upper end of the cartridge case 13.
The bottom of the cartridge case 13 has holes 7 for hot water, cold water, and mixed water in the function chamber C.
Three through holes 40 and 5 overlap with holes 9 and 11, respectively.
0.60 has been established. Moreover, the through hole 40,
50 and 60 are provided with gaskets 41, 60 to seal the inner bottom surface of the functional chamber C and the lower surface of the cartridge case 13, and the inner bottom surface of the cartridge case 13 and the fixing plate 4, respectively.
51 and 61 are fitted.

The fixing plate 4 is made of a ceramic (alumina oxide Al ₂ O ₃ ) plate formed into a disc shape with a diameter slightly smaller than the inner diameter of the cartridge case 13 , and is rotated inside the case 13 so as to overlap the inner bottom surface of the cartridge case 13 . Impossibly stored and deployed.

The means for fixing the cartridge case 13 and the fixing plate 4 in a non-rotatable manner is a pin 16, which is inserted through the fixing plate 4 and the cartridge case 13 and fixed in the functional chamber C.

A rotary plate 5 made of a ceramic (alumina oxide Al ₂ O ₃ ) plate formed into a disc shape having a slightly smaller diameter than the fixed plate 4 is superimposed on the fixed plate 4 so as to be freely rotatable.

These fixed plate 4 and rotary plate 5 are members that constitute the valve A, and are mirror-finished to the extent that their contact surfaces can be sufficiently watertight. The fixed plate 4 and rotating plate 5 that constitute the valve A are the cartridge case 1.
It is stored in Function Room C during repairs and inspections.
This is convenient because it is only necessary to take out the cartridge case 13.

The fixed plate 4 includes a hot water inflow hole 1 which communicates with the hot water, cold water, and mixed water holes 7, 9, and 11 of the main body B through the holes 40, 50, and 60 of the cartridge case 13, respectively; Cold water inflow hole 2, mixed water outflow hole 3
is opened at a location that can be covered by the rotary plate 5 no matter what position the rotary plate 5 is in, and the rotary plate 3
, a recess 17 is provided on the sliding surface with the fixed plate 4 to allow one or both of the hot water inflow hole 1 and the cold water inflow hole 2 to communicate with the mixed water outflow hole 3 when the rotary plate 5 is in the valve open position. This recess 17 serves as a mixing chamber and also serves as a flow path for cold water and hot water when the valve is opened. During the rotational movement of the rotary plate 5, the water passing areas of both the hot water inflow holes 1 and 2 are temporarily changed while the sum of the water passing areas of the hot water inflow holes 1 and the cold water inflow holes 2 is kept almost constant. It's getting old.

The recessed portion 17 is provided on the contact surface with the fixed plate 4 as described above, and the outer peripheral end portion of the arc-shaped curved portion 37 has the outer shape of the hot water inflow hole 1 and the cold water inflow hole 2, as shown in FIG. A circular arc portion 20 having a slightly larger diameter than the curved portion 37 is formed at the lower end of the projection portion 19 .

On the upper surface of the rotary plate 5, the upper end is integrally fixed to the rotary lid 12, and the lower end of the spindle shaft 22 is a rectangular shape that rotates with the rotation of a single lever handle 21 screwed onto the rotary lid 12; A groove 24 is provided which engages with a hexagonal or other angular or elliptical protrusion 23 .

The spindle shaft 22 has an upper end that engages with an engaging part 25 such as a spline or serration carved inside the rotating lid 12, and has a disc 26 on a protrusion 23, and the disc 26 is made of synthetic material such as polyacetal. A support piece 35 is provided inside to maintain engagement between the protrusion 23 at the lower end of the spindle shaft 22 and the groove 24 via the resin slip washer 27, and the support piece 18 is inserted into the cartridge case 13 from above. The rotary plate 5 and the support piece 35 are held pressed toward the bottom of the cartridge case 13 by being screwed together with the screws.

A notch 28 having a predetermined rotation angle is formed in the upper end of the support piece 35, and a stop pin 29 fixed to the spindle shaft 22 is caught in this notch 28, so that the lever cannot be rotated beyond a certain angle. The handle 21 is restricted from rotating. Further, this support piece 35 is provided with a latching pin 30 that holds the support piece 35 itself non-rotatably, and is latched to the cartridge case 13.

The rotating lid 12 is located on the functional chamber C so as to cover the open part at the upper end of the functional chamber C, and the spindle shaft 2
2 is integrally fixed to the upper end with a set screw 31,
A lever handle 21 is screwed onto a handle attachment portion 32 on the side of the rotating lid 12.

33 is a discharge fitting having a water sprinkling tube 36 at its tip and rotatably connected to the mixed water discharge port 10; 34;
Reference numeral 42 indicates a check valve, and 42 indicates a display indicating how to operate the lever handle 21.

Therefore, when the lever handle 21 is rotated in the left-right direction, the rotary plate 5 rotates integrally with the spindle shaft 22 that engages with the rotary lid 12.

The mixing state of hot water and cold water caused by the rotation of the rotary plate 5 will be explained based on the drawings. The valve A in FIG. The valve is closed. B is a state in which the valve is turned slightly to the left compared to the state in A, and the cold water valve is fully opened, while the hot water valve is still closed. When the rotary plate 5 is rotated from A to B, the water passage area of the cold water inflow hole 2 increases temporarily, and the cold water is discharged with a temporary change. C is a state in which the water is rotated slightly more than in B, and the opening is about 3/4 for cold water and 1/4 for hot water, which is what is called lukewarm water. D is slightly rotated compared to C, cold water is at about 1/2 opening, and hot water is at about 1/2 opening at the appropriate temperature. E is the opposite state of C, rotated slightly more than the state of D,
Mix with warm water at a slightly higher temperature. F is when the hot water valve is fully open and the cold water valve is closed. When the rotary plate 5 is rotated from B to F, the water passing area of the cold water inflow hole 2 is temporarily decreased, and conversely, the water passing area of the hot water inflow hole 1 is temporarily increased. Note that if this rotary plate 5 is rotated further to the left, the stop pin 29 that fixes it to the spindle shaft 22 will get caught in the notch 28 of the support piece 27, and if it is rotated to the right, the state will change from state F to state A. Changes sequentially.

As described above, the rotary plate 5 rotates with the lever handle 21 centered around the spindle shaft 22, keeping the sum of the water flow areas of the hot water inflow hole 1 and the cold water inflow hole 2 almost constant, while maintaining the two inflow holes 1, The water flow area of each of the two is temporarily changed, and the amount of mixed water is kept almost constant and discharged to the mixing outflow hole 10 and the discharge fitting 33. That is, the temperature of the mixed water is adjusted appropriately and only hot water or cold water is discharged.

Now, Q; Flow rate tm; Temperature of mixed hot water Qc; Water side flow rate α; Hot water side fully open angle Qh; Hot water side flow rate β; Mixed water flow rate Θ; Rotation angle (water side fully open 0°. Figure b) tc: Water supply temperature tn: Hot water supply temperature, Qc = β - β / αΘ, Qn = β / αΘ ... Also, Qc + Qn = β = constant ... Here, (tm - tc) Qc = ( th−tm)Qh holds. ∴tm(Qc+Qh)=tnQh+tcQc ∴tm=tnQh+tcQc/Qc+Qh ... If you substitute , into tm=th・β/αΘ+tc(β−β/αΘ)/β =th・Θ/α+tc -tcΘ/α = (th-tc)/α・Θ+tc...

In other words, when the mixed water flow rate is constant, the water side flow rate decreases or increases primarily, and when the hot water side flow rate increases or decreases primarily, the temperature change also occurs temporarily.

In the embodiment, the fixed plate 4 and the rotary plate 5 are made of ceramic (alumina oxide Al ₂ O ₃ ), but they may also be made of metal such as a hard alloy.

Further, in the embodiment, the rotation angle of the rotary plate 5 is regulated by the stop pin 29 fixed to the spindle shaft 22 and the notch 28 of the support piece 35. The rotation angle of the rotary plate 5 may be restricted by providing a notch in the surface, or a protrusion may be provided on the rotary lid 12 and a notch may be provided on the presser piece 15 or the upper surface of the function chamber C of the main body B to regulate the rotation angle of the rotary plate 5. It may be regulated.

Note that the rotary plate 5 may be composed of two parts, and the recess 17 may be formed by the two parts.

<Effects of the Invention> Since the present invention has the above configuration, it has the following advantages.

As the rotary plate rotates, the fan-shaped protrusion of the recess overlaps each inlet hole, changing its area to adjust the flow rate of cold water or hot water.The fan-shaped protrusion and the fan-shaped arc overlap each inlet hole in turn, and their areas are inversely proportional. Since the flow rate of cold water and hot water is adjusted by changing the flow rate of cold water and hot water, it is possible to change only the mixing ratio without changing the amount of mixed water with a simpler configuration in the mixing area compared to conventional ones, and it is possible to widen the temperature adjustment range. can.

Therefore, the design and processing of the concave portion is easy, and the mixing water can be finely adjusted.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of the hot water mixing faucet of the present invention. Figure 2 is the same side view with a portion cut away. Third
The figure is a cross-sectional plan view taken along the line X-X in Figure 1. A is a cross-sectional plan view showing the state in which both the hot water and cold water valves are closed, and B is a cross-sectional plan view showing the state in which both the hot water and cold water valves are closed. A cross-sectional enlarged plan view showing the condition.
A cross-sectional plan view showing a state in which the hot water is opened to about 1/4 degree, D is a cross-sectional plan view showing a state in which both cold water and hot water are opened to about 1/2 degree by rotating slightly from the state in C, and E is a cross-sectional view showing a state in which both cold water and hot water are opened to about 1/2 degree from the state in C. A cross-sectional plan view showing a state in which the hot water is opened to about 3/4 and the cold water is opened to about 1/4 by rotating the valve. 4 is a front view of the stationary plate, FIG. 5 is a plan view thereof, FIG. 6 is a bottom view of the rotating plate, FIG. 7 is a longitudinal sectional front view thereof, and FIG. 8 is a plan view thereof. A...Valve, 1...Hot water inflow hole, 2...Cold water inflow hole, 3...Mixed water outflow hole, 4...Fixing plate, 5...
Rotating plate, 17... recess, 19... protrusion, 20...
...Arc part.

Claims (1)

[Claims] 1. A fixed plate in which a hot water inflow hole, a cold water inflow hole, and a mixed water outflow hole are drilled, and a fixed plate that is watertightly and slidably superimposed on this fixed plate, and has either of the above-mentioned hot water inflow hole or cold water inflow hole on the sliding surface. In a hot water mixer faucet in which the valve is constituted by a rotary plate having a concave portion that connects one or both of them to a mixed water outflow hole, each of the inlet holes of the fixed plate has the same center angle with respect to the center of the fixed plate. It is formed into a shape surrounded by a large arc and a small arc with different radii, and two straight lines whose extension lines intersect at the center of the fixed plate, and the concave part of the rotary plate has the same central angle as the inflow hole and the above large arc. A fan-shaped circular arc portion having an intermediate arc with a radius intermediate between the circular arc and the small circular arc and simultaneously aligning with both inflow holes when overlapped with the fixed plate, and a fan-shaped circular arc portion that is connected to the mixed water outflow hole side of this circular arc portion. A hot water mixing faucet characterized in that a pair of sector-shaped protrusions each having an arc having the same central angle as the inlet hole and the same radius as the large arc are formed.