JPS626146B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a diaphragm water supply valve device that uses a diaphragm and can maintain a high degree of liquid tightness for a long period of time.

Conventionally, diaphragm valves have been widely used in fluid flow paths as flow regulating valves and cutoff valves, but have rarely been used in water faucets. This is because conventional diaphragm valves had low durability and were thought to be unsuitable for faucets that are frequently opened and closed.

To be more specific, conventionally, for example, as disclosed in U.S. Pat. No. 2,966,928, a flat diaphragm is fixed to the inner circumferential wall of the valve body within the valve body.
A faucet has been provided which has a configuration in which a diaphragm is pressed against or separated from a valve seat via a relatively sharp lower end of the valve stem when the valve stem moves in the axial direction, thereby opening and closing a flow channel. However, in this configuration, the diaphragm is pressed against the valve seat by the relatively sharp lower end of the valve stem, so the diaphragm comes into contact with the valve seat in a state of contact close to a circular line contact. Since the stress is concentrated on the parts, the contact parts deteriorate quickly and have poor durability. And since the contact area between the valve seat and diaphragm is small,
If a portion of the contact portion of the diaphragm is damaged due to this deterioration, the flow channel closing function becomes insufficient.

Furthermore, the diaphragm in the above-mentioned U.S. patent is placed flat and untensioned in the valve open position, but when the lower end of the valve stem contacts the valve seat, it is stretched and a tensile force is applied to the entire diaphragm, thereby causing There was also concern that deterioration would increase.

Therefore, in the present invention, in order to overcome the above-mentioned drawbacks, the diaphragm used in the water supply valve device is formed of a rubber elastic material with sufficient flexibility, and the diaphragm is provided with an external bead portion located on the outer periphery and a side wall. an inner loop displaceable upon movement of the closure relative to the outer bead, an outer reverse loop extending in a direction opposite to the inner loop, and an outer reverse loop extending radially from the closure; The rim portion and the side wall portion of the closing portion are provided with a wall thickness larger than that of the bearing portion. Further, the rim portion of the closing portion of the diaphragm can be held by the end portion of the valve plunger which operates in conjunction with the valve stem.

By adopting the above-described unique configuration, the present invention makes effective use of the high degree of contact of the diaphragm formed of a rubber elastic material with the valve seat, and makes it possible to prevent the diaphragm from moving when the diaphragm is pressed against the valve seat. The purpose is to abut against the valve seat with a wide contact area and to prevent excessive tensile force from being applied to the diaphragm.

Other objects of the invention will become apparent as it is explained in conjunction with the accompanying drawings.

The present invention will be described below with reference to preferred embodiments, but the present invention is not limited to these embodiments, and selections and design changes that are included in the technical idea of the present invention as shown in the appended claims will be described. and equivalents.

1 and 2 illustrate a replaceable valve cartridge containing a diaphragm valve arrangement constructed in accordance with the present invention. Generally, the valve cartridge includes a generally cylindrical body or valve body 10 and an actuating valve stem 1.
2, and the operating valve rod 12 has a knurled portion 14 separated by a smooth portion 16 and an annular flange 15. The lower body portion 17 of the valve body 10 is provided with an inlet portion 18 and a side outlet portion 19 communicating with the outlet chamber 20 .

According to the invention, a replaceable valve cartridge uses a diaphragm valve containing a diaphragm 22, a reciprocating valve plunger 24 and a tubular inlet 26 into which water can be introduced. The end portion has a valve seat portion 27 . The valve plunger 24 can be cammed downwardly from the open position to the closed position of the valve via a cam plate 30 carried by the actuating valve stem 12. When the actuating valve stem is rotated to the closed position, a downward force acts on the cam plate 30, and the water pressure acting on the diaphragm causes the diaphragm to rise, causing the valve plunger 24 to move downward against the force that opens the valve. Press down. Meanwhile, the actuating valve stem 12 is rotated using force from water pressure to raise the valve plunger 24 to the open position of the valve.
The valve plunger 24 is supported for reciprocating movement along the axis of the tubular inlet portion 26 during movement of the valve between open and closed positions by the arrangement shown in FIG. That is, this is achieved by slidably inserting a straight key member 32 perpendicular to the outer peripheral surface of the valve plunger 24 into a keyway 34 provided in the cylindrical inner wall of the upper body 36 of the valve body 10. . Since the valve plunger 24 is held so as not to rotate, no relative movement occurs between the valve plunger 24 and the diaphragm 22, thereby preventing the diaphragm 22 from being worn out and shortening its lifespan. The upper body 36 has a cylindrical inner wall 37, the valve plunger 24 has a cylindrical outer shape, and the valve plunger 24 can be slidably inserted into the inner wall 37 of the upper body 36. . The cam plate 30 is also provided in a cylindrical shape,
A spiral or sloped lower cam surface 28 is formed and also abuts a spiral sloped upper cam surface 38 of the plunger, and each of the cam surfaces of the cam plate 30 and the valve plunger 24 When the operating valve stem 12 rotates, the valve plunger 2
4 are linked so that they can move back and forth. The operating valve stem 12 can rotate approximately 150 degrees within the arcuate groove 39 (see FIG. 5).

The valve body 10 of the replaceable valve cartridge has a generally cylindrical outer surface and is comprised of upper and lower bodies 17, 36 of injection molded plastic. The valve cartridge is dimensioned to fit into a hole of the same size in the faucet body, and in order to seal this, an external O-ring 40 is disposed in a groove provided on the outer surface of the valve body 10. , and a pair of ears 42 on the end of the valve body 10 which are engageable with corresponding grooves in the faucet body. The upper body part 36 and the lower body part 17 of the valve body 10 are connected to an external bead (in other words, a "bead" is an annular shape It is provided so that it can be inserted and removed with a part 44 (pointing to the bead) interposed therebetween. When assembling the body parts 36, 17, each body part is slidably inserted and the tab (in other words, the bulge part) 46 (first
and FIG. 6) is the lower body 1 of the valve body 10.
It is formed on the outer surface of the upper body part 36 so as to be inserted into the insertion hole 48 provided in the wall of 7, and the upper and lower body parts 36, 17 are made of plastic and have suitable elasticity. tab 46 snap-fits into engagement hole 48 such that longitudinal separation and relative rotation are prevented.

In particular, as shown in FIG.
By abutting the shoulder portion 50 provided at the cam plate 6 with the upper outer end of the cam plate 30, the valve body 10 is prevented from coming off in the axial direction. Actuation valve rod 12
In order to prevent the valve from tilting downward and laterally, the upper body 36 of the valve body is provided with four elastic fingers (in other words, gripped by inward protrusions) extending in the radial direction, as shown in FIGS. 1 to 3. A functional member 52 (the radial width of the elastic finger) is formed on the actuating valve rod 12.
The outer diameter of the smooth portion 16 is slightly smaller than the outer diameter of the smooth portion 16. When incorporating the operating valve stem 12 into the upper body 36 of the valve body, the operating valve stem 12 is inserted from the bottom, the finger member 52 is expanded by the annular flange 15, and by further insertion, the smooth portion of the operating valve stem 12 is expanded. The finger member 52 is pressed against the finger member 16. At this time, the upper flat end portion 54 of the finger member 52 is seated on the lower side of the flange 15. Therefore, the actuating valve rod 12 and the cam plate 30 can be connected to the shoulder 50 without any gap at the end.
and a finger member 52, which removes all air gaps and holds the actuating valve stem 12 so that no air gaps or tilting occur on the sides.

The valve device will be explained in more detail. A cylindrical internal chamber 56 is formed in the upper body 36 of the valve body 10, and the cam plate 30 and the valve plunger 24 are housed in the internal chamber. On the other hand, as described above, a tubular inlet portion 26 for introducing water is formed in the lower body portion 17 of the valve body 10, and the end portion of the tubular inlet portion 26 functions as a valve seat 27. Tubular inlet section 26
An annular outlet chamber 20 is formed between the tubular inlet portion 26 and the inner wall portion 58 of the lower body 17 of the valve body 10 at the circumference of the valve body 10 .
and an outlet section 19 that communicates the outlet chamber 20 with the faucet body (see FIG. 1). The outer bead portion 44 of the diaphragm 22 made of a rubber elastic material is supported between the removable upper and lower body portions 36 and 17, and is connected to the outlet chamber 20, the valve plunger 24, and the inner chamber 56 accommodating the valve plunger. The space between the valve plunger 2 and the valve plunger 2 is maintained liquid-tight.
4. There is no moisture on the cam plate 30 and valve stem 12. Therefore, according to the present invention, it is possible to provide a valve device having a valve stem that is free from moisture in the operating portion of the valve device and free from the risk of corrosion due to moisture.

One of the important aspects of the present invention is the selection of a suitable material for the diaphragm. Research has shown that materials with the following properties are preferred:

(1) It is unaffected and undamaged by water components and changes over time; (2) It has a long life, and its hardness, elongation, and strength do not change significantly even when subjected to frequent compression and bending, and during operation. (3) have an appropriate fatigue limit such that the stress applied to the material during use is much smaller than the fatigue limit; (4) the material must not be exposed to moisture. It can withstand long-term corrosion even when hard particles such as sand pass through it, and it can withstand the abrasion caused by valve seats with rough edges that can cause rubber penetration and corrosion when brought into contact with the valve seat. Although there are other suitable materials for the diaphragm 22, it has a hardness of approximately 60 durometers.
EPDM (ethylene propylene diene terpolymer) rubber has been found to be suitable. In addition, the diaphragm 22 is formed with an inverted plate-shaped closing portion 59 using the above-mentioned material (see FIG. 7), and the valve plunger 2 is attached to the valve seat 27 as shown in FIG.
4, and the valve seat 27 reaches the valve open position of the valve plunger 24, as shown in FIG.
It has a rim 60 spaced apart therefrom for passing water from the inlet section 18 to the outlet chamber 20.

The inverted dish-shaped closure 59 of the diaphragm 22 is inserted into the recess 62 of the valve plunger 24, and the rim 60 of the closure 59 projects beyond the end of the plunger 24 into abutment with the valve seat 27. When the valve is in the closed position shown in FIG.
0 is pressed against the valve seat 27, and the inner wall portion 64 of the closing portion 59 is slightly compressed to effect a first seal against the valve seat 27. Also, at the time of this pressure, the inner wall 64 of the rim 60 of the closing portion 59 protrudes beyond the end of the valve seat 27, reaches the tubular inlet portion 26 side, and opens the second
is sealed. In order for the valve plunger 24 to slowly open and move away from the valve seat 27 as it is raised from the closed position of the valve, the thickness at the beginning of the head must be approximately 0.020 mm such that the closing portion maintains a circular contact surface as shown. It should not be compressed more than an inch (approximately 0.051 cm), and if it were compressed more than approximately 0.020 inch,
The rim 6 of the closing portion 59 is spaced apart from the valve seat 27.
When raising the valve, the handle or actuating valve stem 12 must be turned with great force. Also, if overly compressed, the rim 60 acts like part of a whistle when water begins to flow, creating noise and
The closing portion 59 is opened rapidly, and a rapid increase in water flow from the inlet portion 18 to the outlet portion 19, that is, surging, is likely to occur. All of the above effects are undesirable in a water supply faucet, and the pressure experienced by the water supply mechanism is such that the valve gradually becomes obstructed even if the pressure is expected to fluctuate over a wide range of pressure in rural well pump systems or urban high-pressure water supply systems. It is desirable that the opening is good without any problems. Furthermore, it has been found that when a compression force of 15% or more of the total height is applied to the rubber elastic material normally used for the diaphragm 22 in the compression region, the stress increases and compression set of the material is excessively induced. Ta. If the valve seat 27 corrodes and wears due to long-term use and hardens due to excessive compressive force when closing the valve, the good sealing performance and gradual opening performance initially obtained will deteriorate.

Accordingly, in accordance with a preferred embodiment of the diaphragm 22 according to the present invention, the inner wall 64 and rim 60 of the closure are configured wider than the valve seat 27 and close when said rim 60 is compressed approximately 0.020 inches. The inner wall portion 64 of the portion 59 is provided so as to be compressed in a wide range smaller than 15% of the height “A” of the closing portion 59, thereby preventing excessive pressurization of the elastic material and preventing excessive compression set. The height of the closure is dimensioned such that a first seal is achieved and the rim 60 projects from the end of the valve seat 27 to provide a second seal.

Further, according to the invention, the inverted plate-shaped closing portion of the diaphragm 22, in which the first and second seals are pressed against the valve plunger 24, extends beyond the valve seat 27 into the area B, in which area B is subjected to water pressure. This will be enhanced by this.

That is, in the closed position of the valve (see FIG. 2), the end of the valve plunger 24 is brought close to the valve seat 27, and the water pressure in region B then causes the thickening of the closing portion 59 extending vertically above the valve seat 27. The inner wall portion 64 is pressed. Therefore, due to the action of the water pressure, the inner wall portion 6
4 is thinned to push the rim 60 towards the valve seat 27 and inlet 18 to achieve a pressure seal and further strengthen the first and second seals.

The amount of compression of the closure 59 between the valve plunger and the valve seat when the valve is in the closed position varies depending on the height "A" of the closure 59, the air gap between the valve plunger 24 and the valve seat 27, etc. Depends on the factors. If the fatigue limit of the diaphragm is exceeded and compression set occurs, the height "A" becomes lower and the amount of compression is reduced when the valve is closed. Furthermore, the manufacturing tolerances allowed during the manufacture of parts affect the amount of voids, and the voids may become smaller due to manufacturing tolerances of the members to be assembled. If the amount of compression of the diaphragm approaches zero due to these factors, according to the invention, a compressive force is applied by the water pressure in region "B" which acts to thin the inner wall of the closing part of the diaphragm, and the valve seat 2
A seal against 7 is obtained. Said pressure seal is a key feature of the invention and maintains the functionality of the valve device over long lifespans and extended periods of use.

To obtain a pressure seal, the valve plunger 24 is provided with an annular edge 70 located outside the valve seat 27 such that the inner end of said annular edge 70 lies outside the valve seat 27 when the valve is in the closed position. It is desirable to form it close to and aligned with the end (see Figure 2). When the valve seat 27 and the annular edge 70 are brought very close together, the outer circumference 6
8 is formed so as to contact the inner wall portion 64 extending in the radial direction in a narrow range, and when the inner wall portion 64 is pressed against the outer peripheral portion 68 by the water pressure in the region “B”,
It is provided to such an extent that the amount of protrusion of the inner wall portion 64 is extremely small.

In addition to being inverted dish-shaped, the closure is inserted within the annular edge 70 of the central portion of the valve plunger 24, thereby securing the closure and ensuring alignment of the rim 60 of the diaphragm with respect to the valve seat 27. Ru. That is, the annular edge 70 of the valve plunger 24 serves to support the closing portion 59 of the diaphragm, said diaphragm 22 being made of a flexible elastic material.
A good seal is obtained at the valve seat 27 and can be matched even if the surface of the valve seat 27 becomes uneven due to corrosion caused by particles.

In addition to the above-mentioned closing parts, the diaphragm 22 according to the invention also includes upper and lower body parts 36, 17 of the valve body 10.
A curved bearing 66 is provided which extends radially towards the external bead 44 which is fixed therebetween. When the diaphragm is in the closed position of the valve shown in FIG. A loop portion 76 is formed. In the case of the closed position of the valve, of course the outlet chamber 2
There is no water in the diaphragm support 66.
There is no water pressure acting on it. When moving the valve plunger 24 from the closed position of the valve to the open position of FIG. It is pressed by the water pressure in the outlet chamber 20. An end wall 77 of the valve plunger 24 formed on the outside of the annular edge 70 is concavely shaped to mate with an external reverse loop portion 76 of the bearing portion 66 of the diaphragm 22 . The annular edge 70 of the valve plunger 24 is rounded. Said annular edge 70
The overall cross section of the concave end wall 77 is the central recess 6.
The valve plunger 24 has a substantially sinusoidal waveform at the outer end of the valve plunger 24. This allows the diaphragm 22 to perform the desired deflection function and provides a continuous smooth contact surface for the diaphragm 22 in the open position of the valve shown in FIG. It can be pressed against the surface without stretching or shrinking.

When the diaphragm 22 is fully extended to the valve open position as shown in FIG. The size and shape of the valve plunger 24 and the location of the external bead 44 are sized so that the water pressure in the chamber 20 forces the diaphragm against the diaphragm 22 without expanding or contracting it, and therefore without placing excessive stress on the diaphragm 22. The length of the bearing portion 66 is approximately equal to the radial length along the valve plunger end wall 77 and the outlet chamber inner wall portion 58 toward the outer bead portion. According to the invention,
Even after repeated use, the diaphragm (especially when the valve plunger 24 moves back and forth, the closing part 59 of the valve is
The life of the diaphragm 22 is extended by a configuration that maintains the stress on the diaphragm 22 well below the point where it exceeds its fatigue limit. During use, the diaphragm support portion 66 is pushed away, and the stress-generating vertices of the inner loop portion and the outer reverse loop portions 74 and 76 of the support portion 66 are radially expanded so that the stress is not concentrated at one point as in a cantilevered state. will move in the direction. Further, when a pressing force is applied to the top of the diaphragm 22 according to the present invention described above, the diaphragm 22 is subjected to a tension force in an outward direction and a compression force in an inward direction with respect to its central plane part, but no tensile force is applied to each loop part. do not have. That is, since the stress acting at this time is only the reverse bending force that forms each loop portion, the maximum stress is limited. When the maximum water pressure is applied to the outlet chamber 20, the diaphragm 22 is fully extended as shown in FIG. It never exceeds.

Figures 8 to 12 show a twin-tube type water supply valve system according to the present invention, which is substantially similar to the single-pipe type, in which hot water and cold water are supplied from separate pipes supplying the valve system to a common outlet pipe. A water supply valve can be formed as a mixing valve that can adjust the flow rate. The mixing valve can be widely used as a shower head water supply valve. For mixing valves,
A device is provided to regulate the flow rate delivered to the showerhead, and a separate valve regulating the flow rate is typically used to maintain a constant amount of water delivered to the showerhead. By using the mixing valve according to the present invention, the water temperature can be adjusted, which is suitable from a safety point of view. When the initial operating valve stem is driven from the off device, cold water is sent to the outlet, and the operating valve stem is further driven. Then, the proportion of hot water mixed with cold water is gradually increased, and when the operating valve rod is finally driven to the maximum open position, the highest temperature hot water is supplied from the outlet, and the supply of cold water is almost constant. Cut off. The mixing valve according to the invention is also equipped with a suitable device for setting the maximum temperature of the hot water.

While the valve arrangement of the present embodiment shown in FIGS. 1 and 2 includes a single diaphragm, the mixing valve according to the invention includes a set of diaphragm valve arrangements, each of said valve arrangements. have the same diaphragm 22 (see FIG. 7). Each diaphragm 22 has a valve plunger 124, 224, respectively.
is provided between the lower body 117 and the upper body 136 of the valve body. The lower body portion 117 includes a tubular inlet portion 126 for hot water and an inlet member 226 for cold water, and each of the inlet portions 126, 2
The end portions of 26 function as a hot water valve seat 127 and a cold water valve seat 227. Valve plunger 124,2
24 is moved downwardly from the open position of the valve to the closed position by a rotating cam plate 130. The cam plate is then rotated by a valve stem 112 to which is mounted an actuation knob or handle 114 (shown in phantom). When the valve stem 112 is rotated to the closed position, a pressing force is generated on the cam plate 130, pushing the valve plungers 124, 224 downward against the force that tends to lift the diaphragm 22. On the other hand, the valve device can be opened by the inlet water pressure acting on the two diaphragms. That is, the valve plungers 124, 224 are raised by the force of water pressure, and the valve stem 1
2 is turned to the open position. Valve plunger 12
4,224 is supported in a reciprocating manner and is operated by a device such as a key member 131 provided outside the hot water valve plunger 124 (see FIG. 11).
provided to hold each valve seat against rotation along its axis during movement of the valve between an open position and a closed position;
At this time, the valve plunger 124 is slidably inserted into a keyway (not shown) in the cylindrical inner wall formed in the upper body portion 136 of the valve body of the valve device. As described above, since the cylindrical inner wall is formed in the upper body portion 136 of the valve body, the cam plate 130 is also formed in a cylindrical shape.

There are two cam surfaces 12 on the bottom surface of the cam plate 130.
8 and 228 are formed to drive the hot water valve plunger 124 and the cold water valve plunger 224, respectively. Cam surface 1 that drives the hot water valve plunger
28 is provided with a concave wall surface 128' whose depth changes on the lower surface of the cam plate 130 (see FIG. 10), while the cam surface 228 for driving the cold water valve plunger is provided with a concave wall surface 128' of the hot water valve plunger.
8' are provided in a concentric ring shape with partitions between them (see FIG. 8). The cam surface 228 of the cold water valve plunger is formed with a bottom end that abuts the top of the cold water valve plunger 224 .

The lower ends of the valve plungers for hot water and cold water each have a cylindrical shape, and the valve body has cylindrical walls 125 and 2.
25 so that each valve plunger has a valve seat 127,
227 so as to be close to and separate from it. As mentioned above, the hot water valve plunger 124 has a first
A key member 131 as shown in FIG. 1 is provided, and a keyway corresponding to the key member 131 is formed in the cylindrical wall 125 of the valve body, while the cold water valve plunger is formed unevenly as described later. , which cooperate with the cylindrical wall, each valve plunger being mounted for reciprocating movement and for preventing rotational movement. When each valve plunger 124, 224 is moved by the cam plate 130 to the position shown in FIG. 8, each diaphragm 22 is pressed against the valve seat 127, 227, and both hot water and cold water valves are closed. . The hot water and cold water valve plungers 124 and 224 are respectively provided with upwardly extending projecting members 129 and 229 (see FIGS. 11 and 12), and each cam surface provided on the lower surface of the rotatable cam plate 130. is in contact with. The upwardly extending projecting member 129 of the hot water valve plunger is provided in an arc shape as shown in FIG. 11, and its top portion is fitted into a cam 128 provided on the lower surface of the cam plate 130. Therefore, when the cam plate 130 rotates, the cam surface 128
The hot water valve plunger 124 is suitably moved up and down. The protruding member 229 extending upward from the cold water valve plunger 224 has a substantially triangular shape as shown in FIG. is configured to be reciprocally movable and retained to prevent rotational movement. FIG. 10 shows the zero reference position, low reference position, and high reference position of the hot water cam surface and the cold water cam surface on which the valve plunger moves.

Each diaphragm valve used in the mixing valve operates identically and has the same features and functions as the single pipe water supply diaphragm valve shown in Figures 1 and 2.
The effect is also similar.

In the mixing valve device of FIG. 8, the lower body 117 and the upper body 136 are made of plastic;
A diaphragm 22 is disposed between each body.
A flow channel is also formed leading from one or both of the inlet sections 126, 226 to a centrally disposed outlet channel 140. The mixing valve system is a single unit that is aligned with the hot and cold water supply pipes that are aligned with the hot and cold water inlets 126 and 226 and the outlet passage 140 of the valve body to deliver a mixture of hot and cold water to, for example, a shower head. It is configured to be attachable to a mounting device (not shown) that includes a tube. The mixing valve device thus functions as a faucet that shuts off water and regulates the water temperature. A cover member 142 is included in the valve body of the mixing valve device,
The mixing valve assembly is retained in the mounting arrangement by a longitudinal mounting screw 144 that threads through a hole in the mounting arrangement.

Hot and cold water cam surfaces 128 and 228 on the rotatable cam plate cooperate with hot and cold water valve plungers 124 and 224, respectively, to direct hot water from the inlet portions 126 and 226 to the outlet passage 140. and adjust the flow rate of cold water. The cam plate is driven via a valve stem 112 having a handle 114 shown in dotted lines in FIG. Figure 9 Long rib 11 of valve stem
3 is shown in contact with a stop 115 for fully closed positioning, and when rotated 270 degrees, it comes into contact with a stop 115' for fully open positioning. One feature of the present invention is the stop portion 115' for fully open positioning.
The purpose of this invention is to provide a device that can adjust the maximum temperature of mixed water and set the maximum temperature of mixed water.

Therefore, the positional relationship between the cam surface and the cooperating surface of the valve plunger can be varied as desired, but from a safety point of view only the cold water valve plunger is Preferably, water is discharged and then the temperature of the water is gradually increased from cold water to hot water to a normal usable temperature as the valve stem is rotated over about 200 degrees. When the valve stem is rotated for the final approximately 60 degrees, it is the final stage of the water temperature adjustment range, and the rib 113 of the valve stem abuts the stop 115' for fully open positioning, the hot water valve device is fully opened, and the cold water The valve system is fully closed. Those skilled in the art will be able to provide appropriately positioned pause areas and gradual advance areas within a 270 degree range on both said cam surfaces, and move each plunger to adjust the amount of hot and cold water to achieve the desired temperature mixture. It will be appreciated that the arrangement is such that hot water is available.

An adjustable circular stop plate 143 is attached to the cover member 1 in order to provide a device for adjusting the temperature of the hot water.
42 and is provided to be held in place via a set of set screws 144. A triangular portion 145 is formed on the cover member 142 and projects into a central recess 146 of the cover member to form a stop portion 115 for fully closed positioning against which the rib 113 of the valve stem 112 abuts. Loosen the set screw 144 and adjust the rotation of the stop plate 143 to move the valve stem from the position shown by the solid line in FIG. The full-open positioning stop 115' formed by a triangular stop 147 on the stop plate 143 can be moved to the dotted line position where rotation is limited to about 170 degrees. Set screw 14
4 is the circular arc slot 148 of the stop plate 143.
The setscrew 14 is tightened through the set screw 14.
4 is loosened, the rotation of the stop plate 143 can be adjusted, and after adjusting the position of the stop portion 147, that is, the stop portion 115' for fully open positioning, the set screw is tightened. The stop plate 143 therefore makes it possible to set the maximum temperature of the hot water, which is an important feature of the invention. An annular protruding rib 149 is formed on the lower surface of the stop plate and is aligned and fitted into an annular groove 150 of the cover member 142.
Furthermore, the outer peripheral part 151 with ribs makes it easier to adjust the rotation.
is equipped.

To further explain the above-mentioned configuration in detail, as shown in FIG. 9, a triangular stop portion 147 that is provided on the cover member 142 and forms the stop member 115 for fully closed positioning is disposed below, and the valve stem 112 When rotated fully 270 degrees, it aligns with a triangular stop 147 provided on the stop plate 143. Since the triangular stop portion 147 is provided on the cover member 142, it is always in a fixed state. Therefore, the stop portion 115' for fully open positioning is adjustable, and does not affect the position of the stop member 115 for fully closed positioning.

According to the present invention configured as described above, the high degree of contact with the valve seat by using the diaphragm formed of a rubber elastic material is effectively used to obtain a high degree of closure against the flow channel, and the diaphragm When the diaphragm is pressed against the valve seat, the thick part of the diaphragm is held by the valve plunger and comes into contact with the valve seat, so it can come into contact with the valve seat with a wide contact area, and it has inner and outer loop parts. This prevents excessive tensile force from being applied to the diaphragm, thereby greatly reducing fatigue in the diaphragm, which in turn can sufficiently cope with frequent opening and closing operations.
Achieve the effect of significantly improving durability.

[Brief explanation of the drawing]

FIG. 1 is a front view in cross-section of a part of a replaceable water valve cartridge having a diaphragm valve device constructed according to the present invention; FIG. 2 is a cross-sectional view thereof;
Figure 3 is a plan view of the same, Figure 4 is a front view of the same part seen from line 4-4 in Figure 1, Figure 5 is a line 5-5 in Figure 2.
6 is a horizontal sectional view taken along line 6--6 in FIG. 2, FIG. 7 is an enlarged perspective view of the same portion, and FIG. 8 is a mixing valve device according to the present invention. 9 is a plan view of the mixing valve device of FIG. 8, FIG. 10 is a bottom view taken from line 10--10 of FIG. 8, and FIGS. Figure 12 shows the same partial plan view. DESCRIPTION OF SYMBOLS 10... Valve body, 12... Operating valve rod, 14... Knurled part, 15... Flange, 16... Smooth part, 17... Lower body part, 18... Inlet part, 19... Outlet part, 20... Outlet chamber, 22... Diaphragm, 24...Valve plunger, 26...Tubular inlet portion, 27...Valve seat, 28...Lower cam surface, 30...Cam plate, 32...Key member,
34...Keyway, 36...Upper body, 37...Inner wall,
38... Upper cam surface, 39... Arc groove, 40... External O
-Ring, 42...Ear part, 44...External bead part, 4
6... Tab, 48... Engagement hole, 50... Shoulder, 52... Finger member, 54... Upper flat end, 56... Internal chamber, 58... Inner wall, 59... Closing part, 60... Rim,
62... recess, 64... inner wall part, 66... support part, 68
...Outer peripheral part, 70...Annular edge part, 74...Inner loop part, 76...Outer reverse loop part, 77...Valve plunger end wall, 112...Valve stem, 113...Rib, 114...Handle, 115', 115...Stopping member , 117...
Lower body part, 121...Groove, 124...Valve plunger,
125... Cylindrical wall, 126... Inlet part, 127... Valve seat, 128... Cam surface, 128'... Concave wall surface, 129
...Protruding member, 130...Cam plate, 131...Key member, 136...Upper body part, 137...Inner wall part, 1
40... Outlet path, 142... Cover member, 143... Stop plate, 144... Set screw, 145... Triangular part, 146... Center recess, 147... Stop part, 148
...Slot, 149...Protruding rib, 150...Annular groove, 151...Outer periphery, 224...Valve plunger, 2
25... Cylindrical wall, 226... Inlet part, 227... Valve seat,
228...Cam surface, 229...Protruding member, 229'...
vertical wall.

Claims (1)

[Scope of Claims] 1. An upper body portion and a lower body portion that have sealing rings spaced apart from each other in the longitudinal direction on the outside, are provided to be able to be installed in corresponding holes in a liquid-tight manner, and are removable. The lower body includes an outlet portion, an inlet portion extending toward the outlet portion in a liquid-tight manner, and an annular valve seat, and the upper body includes a cylindrical chamber. a generally cylindrical valve body; a cylindrical valve plunger that is non-rotatably but reciprocally supported within the cylindrical chamber; and a cylindrical valve plunger that projects from one end of the valve body and is rotatably held within the cylindrical chamber of the upper body. a valve stem extending to the coupled cam plate; and an outlet portion and a cylinder of the upper body having an outer periphery held between the upper body and the lower body and making the valve plunger, cam plate, and valve stem liquid-tight. a diaphragm formed of a rubber elastic material and disposed between the cam plate and the valve plunger, the cam plate has a spiral lower surface, the valve plunger has a spiral upper surface, and the cam plate has a lower surface. and the upper surface of the valve plunger contact and cooperate with each other when the valve stem and cam plate rotate to move the valve plunger along the axis of the annular inlet between the open and closed positions of the valve. The diaphragm is provided to move toward and away from the seat, and the diaphragm includes an outer bead portion on the outer periphery, a thick closing portion having an inner wall portion and a rim portion, and an inner loop portion that is freely displaceable when the closing portion moves relative to the outer bead portion. and an outer reverse loop portion extending in the opposite direction to the inner loop portion, and a bearing portion extending radially from the closure portion, wherein the rim portion and the inner wall portion of the closure portion are thicker than the bearing portion, and the diaphragm A rim portion of the closing portion of the valve is supported by an end of the valve plunger that is aligned with the valve seat and is pressed against the valve seat when the valve plunger is in the valve closed position and is in contact with the valve seat when the valve plunger is in the valve open position. A diaphragm water supply valve device, characterized in that the diaphragm water supply valve device is provided at a distance to allow water to pass from the inlet to the outlet chamber, and the support portion of the diaphragm is provided so as not to be strained during opening/closing operations of the valve plunger. 2. The closing part is provided in the shape of an inverted dish, and the surface of the rim part is located in a plane parallel to and spaced from the mounting plane, and when the diaphragm is displaced, the inner wall of the closing part in the shape of an inverted dish is located in the plane of the mounting plane. The diaphragm water supply valve device according to claim 1, which is provided so as to intersect with the diaphragm water supply valve device. 3. The diaphragm water supply valve device according to claim 2, wherein the rim portion of the inverted dish-shaped closing portion and the external bead portion are circular.