JPH07116737B2 - Water supply valve device in flush toilet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water supply valve device used for supplying water to a water tank such as a flush toilet bowl.

[Conventional technology]

A conventional water supply valve device used for water supply and water level control of a water tank such as a flush toilet is a water supply pipe installed upright in the tank, a valve device provided at the upper end of the water supply pipe, and the valve device is opened and closed. It is composed of an operating member, an elongated operating lever connected to the operating member, and a float provided at one end of the lever.

[Problems to be Solved by the Invention]

However, since such a conventional water supply valve is provided with an operating lever extending in a substantially horizontal direction in the water tank and a spherical float having a considerably large volume, the overall structure and appearance are unsightly and occupy in the tank. The installation space is also large, and the valve device is controlled to open and close by floating the float with sufficient buoyancy and interlocking the operating lever, so a sufficient amount of water is required in the tank and a large tank must be used. Occupies a large space for the toilet bowl, and wastes the amount of water when flushing. Furthermore, when adjusting the water level in the tank, forcibly bend the lever or adjust the length with screws. Therefore, adjustment is not convenient and easy, it is not applicable to tanks of different sizes, it has no compatibility and commonality, and the canister and operating member are used after a long period of use. Loosen the screw that connects the valve, causing the valve to malfunction. Furthermore, the sound of water when supplying water is loud, and the opening of the valve gradually decreases as the float rises, and the amount of water gradually decreases, and the tank fills up. It takes a long time to supply water, and if the water supply valve fails, it must be removed or replaced with a tool, which is very inconvenient. Since it is bulky, there are problems such as inconvenience in handling and packaging.

[Means for Solving the Problems]

In the water supply valve device according to the present invention, the lower end portion is formed at the mounting end portion, the drainage hole is provided slightly above the mounting end portion, and the pipe outer peripheral surface extending above the drainage hole is also used for locking and adjusting the water surface. A double cylindrical water supply / drainage pipe 2 provided with a means, and a double cylindrical water supply / drainage pipe portion 1a extending downward at one end are slidably and axially inserted into the water supply / drainage pipe 2 at the other end. The expandable hollow cylinder portion 4 serving as an air pressure chamber is provided so as to project downward, and inside the main body above the hollow cylinder portion 4, the main valve 3a that opens and closes the water supply valve port 54 by a pressure difference. And a sub valve that is provided between the main valve 3a and the upper end of the hollow cylinder portion 4 and that is operated by air pressure to change the pressure above and below the main valve 3a to open and close the main valve 3a. A valve device 3 provided with a valve 3b is provided, and a water supply / drainage communication passage member 5 is provided between the valve device 3 and the water supply / drainage pipe portion 1a. And a valve body 1 formed of

[Action]

According to the present invention, a valve body having a double diaphragm valve that operates by an internal pressure difference and a water supply / drainage pipe having a double cylindrical shape are provided as a unit, and a substantially sealed compact structure is provided. Since the conventional float, actuating lever, other members, connecting members connecting these members, pivoting members, etc. are not used at all, the failure rate is low, the service life is long, and the valve device mounting height is high. Can be easily adjusted as well as the water level,
It can be used with any type of conventional water tank, has commonality and compatibility, and it is extremely easy to install, inspect, and maintain the valve device, and even an layperson can do it easily, and a unique water supply is possible. With the drainage system, there is no noise during water supply and the water supply time is shortened.

〔Example〕

1 to 5 show an embodiment of the present invention, in which this water supply valve device is composed of a wearable valve body 1 and a water supply / drainage pipe 2 which is slidably fitted in a cylindrical portion of the valve body 1. To be done.

As shown in FIGS. 3 and 4, in particular, the valve body 1 has a double structure including an inner water supply pipe 11 and an outer drainage pipe 12 which are coaxially arranged and whose upper ends are connected by a plurality of connecting pieces 13. A cylindrical water supply / drainage pipe portion 1a, and one end is attached to the upper end of the water supply / drainage pipe portion 1a by a mounting means such as a screw 14, and the other end is extended horizontally in a direction orthogonal to the water supply / drainage pipe portion 1a toward the outside. The dish-shaped bottom plate portion 1b extends, a lid body 1c which is fitted to the bottom plate portion 1b by snap fitting means 15 or the like to form a housing having a valve chamber 16 therein, and is housed in the valve chamber 16. Bottom plate 1b
A dual valve device 3 which is mounted on the upper side and in which the main valve 3a and the sub valve 3b are arranged so as to face each other in the vertical direction, and a double valve device 3 located below the double valve device 3 from the center of the lower surface of the bottom plate portion 1b. The upper cylinder 41 and the upper cylinder 41 are attached to the bottom plate 1b so as to project downward.
Is provided above the double valve device 3 and the double pipe-shaped water supply / drainage pipe portion 1a, which is a hollow cylinder portion 4 which is composed of a lower cylinder 42 which is slidably fitted to the free end of the double cylinder device 4 and the double valve device 3a. One end communicates with the upper end opening of the water supply / drainage pipe portion 1a, and the other end forms a valve seat 53 and a water supply valve port 54 above the valve device 3 to connect the water supply communication passage 51 and the drainage communication passage 52. It is a valve main assembly integrally configured with the water supply / drainage communication passage member 5 that is provided.

The water supply / drainage pipe 2 includes a water supply pipe 21 provided in the center portion on the inner side, as shown in FIG. 2, FIG. 3 and FIG.
Around the water supply pipe 21, a plurality of circumferentially extending locking projections 23 are provided on the outer peripheral wall along the axial direction in one or several rows, and at least one vertical groove 24 is provided between the locking projections 23.
(4 grooves forming 90 ° intervals in this embodiment) and this vertical groove
A plurality of locking lateral grooves 25 communicating with 24 are formed, and a drain pipe 22 having a flange portion 26 at the lower end and a mounting end portion 27 such as a screw cylinder protruding from the lower surface of the flange portion 26 is formed. In the double pipe configured, the water supply / drainage pipes 21 and 22 are integrally connected by the annular bottom wall 28 of the flange portion 26 having the mounting end portion 27 projecting therefrom, and the flange portion 26 has an internal space of the drainage pipe 22. A plurality of drainage holes 29 are provided which communicate with a place, that is, an annular drainage passage.

The valve body 1 includes a water supply / drain pipe 2 having a double tubular pipe 1a.
Then, the completed water supply valve device of the present invention is constructed by removably fitting and inserting it through the locking means. Specifically, at least one locking projection provided on the inner peripheral wall of the lower end portion of the drainage pipe 12.
In order to fit 17 to the upper end of the vertical groove 24 provided on the outer peripheral wall of the drainage pipe 22 of the water supply / drainage pipe 2 and to fit the water supply pipe 11 to the outer periphery of the water supply pipe 2, connect the class drainage pipe part 1a to the water supply / drainage pipe 2. The former is inserted at an arbitrary height (A-A in this embodiment) with respect to the latter.
After inserting it up to the position of the line), if it is rotated slightly to the side, the projection 17 will have a lateral groove 25 between the corresponding pair of locking projections 23.
The valve device assembly is slidably fitted therein, and is locked by the locking projections 23, and the valve body 1 and the water supply / drainage pipe 2 are detachably and adjustably integrally assembled.

The dual valve device 3 will be described in more detail. As shown in FIG. 3, the rubber diaphragm type main valve 3a located above the valve chamber 16 and having a small diameter through hole 31 in the center has a peripheral edge. An upper annular holding portion 35 of a holding plate 34 having a small-diameter valve opening 32 and a valve seat 33 protruding downward in the center, and the valve seat 53.
The main valve 3a is mounted so as to always close the water supply valve opening 54 of the valve seat 53 while being sandwiched between the inner peripheral wall of the cylindrical portion 55 forming the water supply valve opening 54 and the water supply valve opening 54. . In addition, the thin diaphragm type auxiliary valve 3b is a valve 3b with its peripheral portion sandwiched between a guide disc 36 provided below the pressing plate 34 and a step portion of the central recess of the bottom plate portion 1b. Mounted so that the convex valve portion 37 protruding from the center of the valve fits in the guide hole 38 provided in the center of the guide disk 36, and the upper end faces the lower end of the valve seat 33 with a slight gap. Has been.

The pressing plate 34 has its outer peripheral edge portion snap-fitted to the fitting portion 18 provided on the upper cylindrical wall of the bottom plate portion 1b to form the bottom plate portion 1b.
Further, the guide disc 36 is held by holding the peripheral edge of the guide disc 36 between the lower annular pressing portion 39 provided on the lower peripheral edge of the pressing plate 34 and the step portion 19 of the bottom plate portion 1b. It is interposed between the plate 34 and the sub valve 3b.

Between the main valve 3a and the pressing plate 34, and between the sub valve 3b and the guide disc 36
When the main valve 3a and the sub valve 3b are elastically deformed due to a change in pressure, the main and sub valve chambers a and b respectively formed between and are formed in a space that allows the deformation sufficiently. . A water discharge hole 10 that communicates with the inner space below the pressing plate 34 and the outer space of the bottom plate portion 1b is provided at an appropriate position where the bottom plate portion 1b and the guide disc 36 overlap. In addition, the bottom plate 1b
A vent hole 101 for communicating the valve chamber 16 with the external space is provided at the base end of the
Is provided.

The upper end of the hollow cylinder portion 4 is mounted in the central hole of the bottom plate portion 1b,
A cylindrical upper cylinder 41 having a plurality of ventilation holes 43 in the upper end wall and an opening at the lower end, and an upper cylinder having an open upper end through an O-ring 44.
The lower cylinder comprises a cylindrical lower cylinder 42 that is fitted to the lower end of 41 so as to be slidable in the axial direction, and has a through hole 45 in the center of the bottom wall of the lower end.
The upper tube 41 is configured to be telescopic like a telescope.

In the water supply / drainage communication passage member 5, the cylindrical portion 56 at one end is fitted to the upper end of the water supply / drainage pipe portion 1a as shown in FIGS. 3 and 4.
The cylindrical portion 55 at the other end is fitted to the outer periphery of the annular pressing portion 35 of the pressing plate 34, and the water supply communication passage 51 located between the both ends is located in the center.
And an annular drainage communication passage 52 in the outer ring are integrally formed. One end of the water supply communication passage 5 communicates with the upper end of the water supply pipe 11, and the other end is opened and closed by the main valve 3a. Valve 54
One end of the drainage communication passage 52 communicates with a void formed around the valve opening 54 and above the main valve 3a through a plurality of water passage holes 57, and the other end of the drainage communication passage 52 supplies water. It is configured to communicate with the upper end of the drain pipe 12 through a plurality of water passage holes 58 formed between the upper outer wall of the pipe 11, the upper inner wall of the drain pipe 12, and the connecting piece 13.

Reference numerals 61, 62, 63, and 64 are O-rings provided between the water supply / drainage pipe 2 and the water supply / drainage pipe portion 1a, and between the upper end of the water supply / drainage pipe portion 1a and one end of the water supply / drainage passage member 5, respectively. It is for maintaining water tightness.

In this embodiment, the water supply / drainage pipe portion 1a and the bottom plate portion 1b of the valve body 1 are molded separately and are integrally connected by a screwing means, but both members 1a, 1b are made of plastic injection. It may be integrally molded by molding. Empty cylinder part 4
The upper surface (upper cylinder) 41 and the bottom plate portion 1b can also be integrally molded in this way. Further, the connecting means of each member may be screwed by screwing, fitting by snapping, bonding by adhesive, welding by ultrasonic heat, or the like. In order to facilitate inspection or replacement of the main and sub valves 3a and 3b when the valve device fails, it is better to use snap fitting means so that it can be easily removed.

Further, 71 and 72 are a mounting nut and a packing used for mounting the water supply / drainage pipe 2 in the water source pipe and the water tank, respectively.

FIG. 6 shows a second embodiment of the present invention, in which a water supply / drainage pipe portion 1a provided in the main body 1 has a mounting end portion 27 extending downward from the lower end of the water supply pipe 11.
And the mounting end 27 is directly connected to the water source pipe in the water tank.

In this case, the water supply / drainage pipe 2 becomes unnecessary. Specifically, the purpose of using the water supply / drainage pipe 2 in the above-described embodiment is that the valve body 1 can be adjusted in height in the tank with respect to the water supply / drainage pipe 2, and can be easily removed and repaired in case of failure. Although it is necessary to be able to do so, if it is not necessary to adjust and if the cost is reduced, the mounting end portion 27 is provided at the lower end of the water supply / drainage pipe portion 1a having a certain length as in the present embodiment. Only the valve body 1 need be used.

FIG. 7 shows a third embodiment of the water supply valve device of the present invention.
This structure is applied to the water tank of the flush toilet where the water source pipe is attached to the upper part of the side wall of the tank. In this embodiment, the structure of the water supply / drainage pipe portion is slightly different from that of the double cylindrical water supply / drainage pipe apparatus 1a of the above embodiment in shape, position, and configuration, but in fact, the overall basic principle, operation, and configuration. Are the same as those in the above-mentioned embodiment, and therefore their explanations are omitted. In the drawings, the same members or corresponding members are indicated by the same reference numerals in principle.

In the above embodiment, the water supply pipe 11 and the drain pipe 12 are arranged in a double cylinder shape arranged coaxially, but in this embodiment, the water supply pipe 11 and the drain pipe 12 are configured to be orthogonal to each other. Has been done. Specifically, the horizontally extending water supply pipe 11 penetrates the base end portion of a multistage drainage pipe 12 whose one end extends vertically downward and which is adjustable in expansion and contraction.
(Refer to FIG. 3) It is configured as a water supply pipe connected to the base end portion so as to communicate with the water supply port and the other end is formed at the mounting end portion 27, while the drain pipe 12 has a lower end at the water tank. It is composed of telescopic multi-stage pipes 121, 122, 123 that can be adjusted to expand and contract so as to be close to the bottom wall. Other, empty cylinder part 4
In contrast to the two-stage type used in the above embodiment, the three-stage type is used in this embodiment. That is, outside the upper cylinder 41 and the lower cylinder 42, one middle cylinder 46 is provided between the upper and lower cylinders 41, 42. As can be seen from these examples, the hollow cylinder portion 4 can be constructed to have a structure capable of expanding and contracting from two stages to several stages as needed, but a non-expandable fixed type empty cylinder, that is, an upper end wall and a lower end wall. It is also possible to construct an empty cylinder part using only one cylinder provided with ventilation holes 43 and 45 respectively.

It is preferable that the water supply valve device configured as described above be molded of synthetic resin.

When the water supply valve device is attached to the water tank, first, in the first embodiment, the attachment end portion 27 at the bottom end of the water supply / drainage pipe is
In the case of the second embodiment, the lower end mounting end of the water supply pipe 11 is
In the case of the third embodiment, the mounting end portion 27 of the horizontal water supply pipe 11 is provided in the bottom wall or side wall of the tank with the nut 71 and the packing 72 and the water source pipe below the hole (see the figure). Fixed connection to the water supply / drainage pipe portion 1a is adjusted to an appropriate height with respect to the water supply / drainage pipe 2 (first embodiment), or the length of the telescopic hollow cylinder portion 4 or the drainage pipe 12 is adjusted. By appropriately adjusting (second embodiment, third embodiment), the mounting of the valve device is completed. At this time, since water has not yet entered the tank, the main valve 3a closes the valve port 54 as shown in FIG. 3, and the auxiliary valve 3b has its convex valve portion 37 as the valve seat 33. A slight gap is left open.

Next, when water is supplied from the water source to the water supply valve device, the water flows from the lower end of the water supply pipe 21 of the water supply / drainage pipe 2 into the upper end of the water supply pipe 11 of the valve body 1 as shown by the arrow in FIG. In the case of the embodiment), or directly from one end of the water supply pipe 11 to the water inlet side end of the communication passage member 5 (second and third embodiments), and then closed by the main valve 3a via the water supply communication passage 51. The main valve 3a is elastically deformed downward by this water pressure to open the valve port 54, and water further communicates with the main valve chamber a which connects the valve port 54 and the water passage hole 57. The water flows through the water passage 57 into the drainage communication passage 52, and from the water passage 58 provided at the upper end of the drainage pipe 12 (see FIG. 3), the inner wall of the drainage pipe 12 and the water supply pipe.
The water flows downward through the annular drain passage formed between the outer walls of 11 and the drain pipe 22, and finally flows into the tank from the drain hole 29 to supply water. This water supply state is the one described in the first embodiment, but in the case of the second and third embodiments, the water is directly supplied from the lower end of the drain pipe 12 into the tank via the water passage hole 58 and the drain pipe 12. To be done. At this time, a very small amount of water flows into the sub valve chamber b above the guide disc 36 through the small through hole 31 of the main valve 3a and the valve port 32 of the pressing plate 34, and then into the tank through the water discharge hole 10. Is released to.

When the water level in the tank rises gradually due to water supply and reaches the lower end of the hollow cylinder portion 4 at or above the through hole 45, as shown in FIG. 9, a part of the water enters the hollow cylinder portion 4 from the through hole 45. Entered, the sub-valve 3b and below and the empty space above the water level L in the empty cylinder, in particular the internal empty space of the empty cylinder part 4, becomes a sealed chamber, and the air that has been present in the room decreases in volume due to the rise of the water level L. As the internal pressure gradually increases,
The pressure-increased air enters the sub-valve chamber b through the ventilation hole 43, and when the air pressure becomes higher than the pressure above the sub-valve chamber b, the sub-valve 3b is pushed upward so as to be deformed upward. The convex valve portion 37 projects from the guide hole 38 to close the valve opening 32. At this time, the effective area of the sub-valve 3b that receives air pressure is much larger than the effective area of the valve port 32 of the valve seat 33 of the pressing plate 34 that receives water pressure. Thus, the valve opening 32 can be surely closed.

After the valve opening 32 is closed, the water above the main valve 3a enters the space below the main valve 3a through the through hole 31, and as the water level in this space rises, the water level between the water surface and the bottom surface of the main valve 3a increases. The volume in the void decreases, the internal pressure in the void rises, and finally, together with the elastic recovery force of the main valve 3a, the main valve 3a is pushed up to close the valve port 54, and the main valve 3a's After the water supply is interrupted, the water accumulated on the upper surface and in the space surrounding the valve seat 53 is sucked out from the water passage hole 57 by the vacuum generated in the remaining water in the drainage pipe and the pipe. Finally, the main valve 3a closes the valve port 54 to interrupt the water supply to the tank and maintain the water surface at a constant level. At this time, the air pressure generated on the lower surface of the main valve 3a is
Since the water pressure generated by the valve opening 54 on the
3a can surely close the valve opening 54.

When the drain valve in the tank is opened for washing with water, the water in the tank is rapidly released and the water level drops.
When the water surface falls below the lower end of the hollow cylinder portion 4, the hollow cylinder portion 4
The air pressure inside is released from the through hole 45, and the sub-valve 3b returns to its original shape by the elastic restoring force to open the closing of the convex valve portion 37 to the valve opening 32. When the valve port 32 opens, the main valve 3a in the main valve chamber a
The water along the lower surface of the valve flows out from the valve opening 32 into the sub valve chamber b, and only the air returned to the atmospheric pressure remains in the main valve chamber a. The water pressure returns to the original state shown in FIG. 8, the valve port 54 is opened, and water is again supplied to the tank as described above.

If you want to adjust the mounting height of the valve device and the height of the water surface of the tank depending on the size and height of the water tank,
The following method is used. That is, after rotating the valve body 1 so that the locking projection 17 enters the vertical groove 24 of the water supply / drainage pipe 2, the valve body 1 is slid in the axial direction and stopped at a desired position.
When the projection 17 is inserted into the lateral groove 25 at the corresponding position by rotating the, the projection 17 is engaged with the upper and lower engaging projections 23 of the groove 25, and the valve body 1 is positioned at a desired height with respect to the water supply / drain pipe 2. Is held in
The height of the water surface is also adjusted at the same time. If after installing the valve device,
When adjusting the water surface without moving the valve body, the height of the water surface can be easily adjusted by simply compressing or extending the lower cylinder 42 of the multistage empty cylinder portion 4 upward with respect to the upper cylinder 41. it can.

〔The invention's effect〕

As described above, the present invention controls the opening and closing of the double diaphragm valve device by the pressure difference between the upper and lower sides of the valve chamber, and is constructed in an assembly in which the valve device and the water supply / drainage pipe are integrated, and the float lever, the float and other pivots. Since no attachment / detachment members are used, the overall structure is extremely compact, convenient to handle, and extremely easy to assemble and install, and can be used for water tanks of various existing flush toilets. The water supply time is shortened, and the water is supplied from the drain hole near the bottom wall of the tank to the inside of the tank, so there is no noise during water supply It is kept constant, and there are effects such as easy adjustment of the water surface and easy maintenance of the valve device.

[Brief description of drawings]

1 is a perspective view showing an embodiment of the present invention, FIG. 2 is the same exploded view, FIG. 3 is the same longitudinal sectional view, FIG. 4 is a cutaway plan view of the same portion, and FIG. FIG. 6 is a front view showing a second embodiment of the present invention, FIG. 7 is a front view showing a third embodiment of the present invention, and FIG. 8 is a valve device at the start of water supply. FIG. 9 is a vertical cross-sectional view showing the main part, and FIG. 9 is a vertical cross-sectional view showing the main part of the valve device at the end of water supply. 1 ... Valve body, 1a ... Water supply / drainage pipe section, 1b ... Bottom plate section, 1c ...
... Lid, 2 ... Water supply / drainage pipe, 3 ... Double valve device, 3a ...
… Main valve, 3b… Sub valve, 4… Cylindrical part, 5 …… Water supply / drainage communication passage member, 11 …… Water supply pipe, 12 …… Drainage pipe, 13 …… Coupling piece, 16 …… Valve chamber, 17 ... Protrusion, 21 ... Water supply pipe, 22 ...
… Drain pipe, 23 …… Locking projection, 24 …… Vertical groove, 25 …… Horizontal groove, 27 …… Mounting end, 29 …… Drain hole, 32 …… Valve port, 33…
… Valve seat, 34 …… Presser plate, a …… Main valve chamber, b …… Sub valve chamber, 36 …… Guide disc, 37 …… Convex valve part, 41 …… Upper cylinder, 42
…… Lower cylinder, 43 …… Ventilation hole, 45 …… through hole, 46 …… Middle cylinder, 51
...... Water supply communication passage, 52 …… Drainage communication passage, 53 …… Valve seat, 54 …… Valve mouth, 57,58 …… Water passage hole.

Claims (5)

[Claims] 1. A dish-shaped bottom plate portion 1b having an empty cylinder portion mounting hole and an annular valve device mounting portion 18 and 19 formed so as to surround the mounting hole, and is attached to and detached from the dish-shaped bottom plate portion 1b. A lid 1c, which is a housing that forms a valve chamber 16 in the inner space by being freely attached, and a base end is attached to the bottom of one end of the bottom plate 1b, and the free end is substantially perpendicular to the bottom plate 1b. The water supply pipe 11 and the drain pipe 12 are coaxially arranged so as to extend to a double cylinder water supply and drain pipe 1a, and the base end is attached to the empty cylinder attachment hole of the bottom plate portion 1b, and the free end is downward. Empty cylinder part 4 protruding to
The main valve 3a, whose lower surface is attached to the upper portion of the valve device attachment portion in the valve chamber 16 via the pressing plate 34, opens and closes the water supply valve port 54 by the pressure difference between the upper and lower sides of the valve, and the main valve 3a.
Is mounted under the valve disc via the guide disc 36 so as to face the upper end of the hollow cylinder portion 4, and the small-diameter valve port 32 provided on the pressing plate 34 is provided by the pressure difference between the upper and lower sides of the valve. A double valve device 3 configured to open and close, and a double valve device 3 is provided between the upper part of the double valve device 3 and the upper end of the water supply / drainage pipe 1a, and one end is connected so as to communicate with the upper end opening of the water supply / drainage pipe 1a. Water supply valve opening whose end is opened and closed by the main valve 3a of the double valve device 3
54, a cylindrical portion 55 for holding the main valve 3a, is attached to the pressing plate 34, and has a water supply communication passage 51 located in the central portion and a drainage communication passage 52 outside thereof. Water valve device in a flush toilet comprising a communication passage member 5 for use in water. 2. The water supply pipe 11 has a base end pipe port as a water supply / drainage communication passage member 5 water supply connection passage 51 and a drain pipe 12 has a base end pipe port for water supply / drainage communication passage member 5 drainage. The water supply valve device in a flush toilet according to claim 1, wherein the water supply valve device is connected to the drainage port of the communication passage 52, and the free end of the water supply pipe 11 is formed at the mounting end portion 27. 3. A double cylindrical water supply / drainage pipe (1) is inserted into the water supply / drainage pipe section (1a) by a locking guide means (17, 23, 24, 25) so as to be slidably adjusted in the axial direction. Water supply and drainage pipe 2
Is fitted in the water supply pipe 11 and has a water supply pipe 21 having a mounting end portion 27 formed at the lower end and a drain pipe 22 fitted in the drain pipe 12 and provided with a drain hole 29 at the lower end thereof coaxially. 2. The water supply for a flush toilet according to claim 1, wherein the pipe is a double pipe formed by integrally connecting both pipes 21 and 2 by a connecting piece 13 formed at the upper end and a flange portion 26 formed at the lower end. Valve device. 4. An upper cylinder 41 whose one end is attached to the bottom plate 1b and which has a plurality of ventilation holes 43 communicating with the sub valve chamber b and whose other end is an opening. The end of the opening is telescopically attached to the lower end opening of the upper cylinder 41 via an airtight ring, and one through hole is formed in the end face of the free end.
The water supply valve device in a flush toilet according to claim 1, wherein the water supply valve device is a multistage empty cylinder including at least one lower cylinder 42 having 45. 5. The double valve device 3 is attached to a diaphragm type main valve 3a provided with a small-diameter through hole 31 in the center thereof and an upper surface thereof always closing the water supply valve port 54, and a bottom plate portion 1b, The inside of the valve device is partitioned into a main valve chamber a and a sub valve chamber b, and the main valve
It is arranged so as to press the peripheral edge of 3a and has a small diameter valve opening in the center.
A pressing plate 34 provided with 32, a guide disk 36 provided below the pressing plate 34 and having a guide hole 38 facing the valve opening 32 in the center, and a guide disk 36 located below the guide disk 36. ,
A convex valve portion 37 in the center is fitted into the guide hole 38 and comprises a diaphragm type auxiliary valve 3b mounted between the bottom plate portion 1b and the guide disc 36 so as to face the valve opening 32 with a slight gap. A water supply valve device in the flush toilet according to claim 1.