JP5474376B2 - Flush valve and flush valve device - Google Patents

Description

  The present invention relates to a flush valve and a flush valve device that automatically stops water supply after supplying a predetermined amount of water as toilet flushing water.

Conventionally, a flash valve shown in FIG. 9 is known as a flush valve that automatically stops water supply after supplying a predetermined amount of water as toilet flushing water.
In the figure, reference numeral 200 denotes a water supply channel, and 202 denotes a piston-type main valve that opens and closes the water supply channel 200. When the main valve 202 is separated from the main valve seat 204, that is, opened, a water supply channel 200 is provided. The upstream primary water channel 200a and the downstream secondary water channel 200a communicate with each other to supply water.
Further, when the main valve 202 is seated on the valve seat 204, that is, when the main valve 202 is closed, the upstream-side primary water channel 200a and the downstream-side secondary water channel 200a are shut off, and water supply is stopped.

A pressure chamber 208 is formed behind the main valve 202 (upper side in the drawing), and the main valve 202 is normally maintained in the closed state shown in FIG. 9 by the pressure of water in the pressure chamber 208.
From this pressure chamber 208, a water drain passage 210 for extracting water in the pressure chamber 208 to the secondary side water passage 200 b in the water supply passage 200 extends, and an activation valve 212 as a water drain valve is provided on the water drain passage 210. It is arranged.

Reference numeral 214 denotes a first water guide composed of a small hole that penetrates the main valve 202 and connects the primary water channel 200 a and the pressure chamber 208 in the water supply channel 200 to introduce water in the primary water channel 200 a into the pressure chamber 208. In the hole, after the main valve 202 is opened, the water in the primary water channel 200a is introduced into the pressure chamber 208 through the first water guide hole 214, whereby the pressure of the water in the pressure chamber 208 is increased.
In addition, this 1st water guide hole 214 comprises the whole water guide hole with the 2nd water guide hole 218 mentioned later.

Reference numeral 216 denotes an operating rod. By operating the operating rod 216, the start valve 212 is tilted (see FIG. 10).
In this flush valve, when the operating rod 216 is operated to tilt the start valve 212, the water drainage passage 210 is opened, and the water in the pressure chamber 208 is drawn into the secondary water passage 200b in the water supply passage 200. The water pressure in the chamber 208 disappears.
Here, the main valve 202 rises due to the pressure of the primary water channel 200a in the water supply channel 200 and opens, and the water supply channel 200 is opened to supply water.

In the pressure chamber 208, after the main valve 202 is opened, water in the primary water channel 200a in the water supply channel 200 is introduced through the first water guide hole 214, and the pressure gradually increases.
When the pressure reaches a predetermined pressure, the main valve 202 is seated on the main valve seat 204 by the pressing action and is closed. Here, the water supply path 200 is cut off and water supply is stopped.

The flush valve also has a second water introduction hole 218, which is also a small hole in addition to the first water introduction hole 214, penetrating the main valve 202 and communicating with the primary side water channel 200a and the pressure chamber 208. The main valve 202 is provided with a sub-valve 220 that opens and closes the second water guide hole 218.
Here, the auxiliary valve 220 closes the second water introduction hole 218 by being seated on the auxiliary valve seat 222 and opens it by being separated from the auxiliary valve seat 222.

Under the closed state of the main valve 202, the sub valve 220 is in a state where it sinks downward in the figure due to its own weight (lowered state). A water chamber 219 is formed for guiding the pressure to the lower side of the auxiliary valve 220 so that the pressure acts on the auxiliary valve 220 upward.
224 is a stopper that contacts the sub valve 220 and opens it, and has a screw 226. The position in the vertical direction in the figure, that is, the position of contact with the sub valve 220 can be adjusted up and down.

The flush valve operates as follows as a whole.
That is, when the operating valve 216 is operated to tilt the start valve 212 as shown in FIG. 10, the water in the pressure chamber 208 is extracted to the secondary water channel 200a in the water supply channel 200 through the water drain channel 210, Here, as shown in FIG. 12, the main valve 202 is opened by the pressure of the primary water channel 200 a in the water supply channel 200.
In this state, the water supply channel 200 is opened and water is supplied.

In the state where the main valve 202 is fully opened as shown in FIG. 11, the auxiliary valve 220 on the second water guide hole 218 is relatively depressed downward in the drawing by the stopper 224, and the valve is opened. Therefore, under this state, the water in the primary water channel 200a is introduced into the pressure chamber 208 through the two water guide holes 214 and 218 of the first water guide hole 214 and the second water guide hole 218.
Therefore, the pressure in the pressure chamber 208 rises more quickly than in the case of only the first water guide hole 214, and the start timing of the subsequent valve closing operation of the main valve 202 is advanced.

Then, as shown in FIG. 12, when the main valve 202 starts the closing operation and descends downward in the predetermined stroke diagram, the sub valve 220 moves away from the stopper 224 in detail when the main valve 202 reaches immediately before closing. At the same time, the second water introduction hole 218 is closed (by the pressure of the primary water channel 200a in the water supply channel 200).
Thereafter, the water in the primary water channel 200a flows into the pressure chamber 208 only through the first water guide hole 214, and the valve closing speed of the main valve 202 becomes slower than before.
Then, when the pressure in the pressure chamber 208 becomes a predetermined pressure, the main valve 202 is closed, where the water supply channel 200 is cut off and water supply is stopped.

  In this flush valve, when the main valve 202 is seated on the main valve seat 204, the main valve 202 is slowly seated or closed, which is to prevent sudden valve closing and avoid the occurrence of water hammer. .

  As described above, in the case of the flush valve provided with the second water guide hole 218, the sub valve 220, and the stopper 224, the valve closing operation after the main valve 202 is opened can be speeded up as compared with the case where these are not provided. Therefore, while maintaining the maximum instantaneous flow rate, the amount of extra water consumed thereafter can be saved, and water can be saved.

  Such a flush valve having a sub valve mechanism including the second water guide hole 218, the sub valve 220, and the stopper 224 is disclosed, for example, in Patent Document 1, Patent Document 2, Patent Document 3, and the like.

  However, in the conventional flush valve shown in FIGS. 9 to 12, the auxiliary valve 220 that is open when the main valve starts to open is closed by the feed water pressure. It is necessary to provide a water channel for circulating water in the water chamber 219 and the primary water channel 200a (on the side opposite to the valve closing direction of the sub valve 220). In the direction), a large space for providing the sub-valve 220 must be ensured, and the main valve 202 becomes large in the axial direction.

  Further, in this flush valve, the sub-valve 220 is fully opened when the main valve 202 is closed, and water in the water supply path 200 passes through the second water introduction hole 218 when the main valve 202 starts to open. As a result, a time is lost until the auxiliary valve 220 closes, causing a delay in the valve opening operation of the main valve 202.

In the case of the flush valve shown in FIGS. 9 to 12, since the main valve 202 is a piston valve, a sealing packing (U packing in the figure) 234 is integrated with the main valve 202 to form an inner peripheral wall surface of the pressure chamber 208. However, the packing 234 is worn while it is repeatedly slid, and there is a problem that a defect due to the wear occurs.
Moreover, the problem that packing 234 becomes difficult to move depending on the water quality is inherent.

By the way, as a cleaning method of toilet bowl (toilet bowl), first, rim cleaning is performed by spraying flush water into the toilet bowl from the rim provided along the peripheral edge of the upper end of the toilet bowl, and then from the jet hole to the drain trap part of the toilet bowl There is a method of jetting wash water toward the inside, filling the inside of the drain trap part and performing jet washing that drains dirty water inside the toilet bowl by siphon action, and then switching to rim washing again to wash the toilet It is widely used as a toilet flushing method.
FIG. 13A shows the waveform of water supply during rim cleaning A-1, jet cleaning B, and rim cleaning A-2 in the same cleaning method.
Here, the horizontal axis represents time, and the vertical axis represents the flow rate of water supply during rim cleaning A-1, jet cleaning B, and rim cleaning A-2.

  When cleaning toilet bowls, the rising and falling of each waveform in rim cleaning A-1, jet cleaning B, and rim cleaning A-2 should be as steep as possible, and rim cleaning A-1, jet cleaning B, and rim cleaning A- Increasing the maximum instantaneous flow rate as much as possible in each of the two is effective in increasing the cleaning ability during toilet cleaning.

However, if the main valve is suddenly closed in each of the rim cleaning A-1, jet cleaning B, and rim cleaning A-2, a water hammer is generated, so it is necessary to close the main valve slowly just before closing. It is.
In this case, in order to perform the rim cleaning A-1, A-2 and jet cleaning B, it is conceivable to use the flash valves shown in FIGS.

  In the case of the flush valve shown in FIGS. 9 to 12, the main valve 202 is a piston valve and can take a large moving stroke, and has a secondary valve mechanism, that is, a water hammer prevention mechanism. It is possible to secure a large flow rate of water supply when performing A-1, A-2 and jet cleaning B, and to avoid the occurrence of water hammer by avoiding sudden closing of the main valve when closing the valve. Is possible.

  However, in the case of this flush valve, the main valve 202 is a self-closing type (a system that automatically closes by the pressure in the pressure chamber 208), and therefore the main valve 202 consisting of a piston valve moves from the fully open state to the fully closed state. Since the stroke at the time of operation is large, it takes a long time from the start of valve closing to the end of valve closing as shown in FIG. Water is wasted.

In the case of the toilet cleaning method described above, the timing of switching from the rim cleaning A-1 to the jet cleaning B and further from the jet cleaning B to the rim cleaning A-2 greatly affects the cleaning performance itself. When the flush valve shown in Fig. 1 is used for toilet cleaning of this cleaning method, the time required for switching from the rim cleaning A-1 to the jet cleaning B, and further for switching from the jet cleaning B to the rim cleaning A-2. It takes a long time and this reduces the cleaning ability.
On the other hand, if the jet cleaning B is started before the main valve 202 is completely closed in the rim cleaning A-1, the water supply pressure for the jet cleaning B becomes insufficient, which also reduces the cleaning performance. It causes you to let me.

  Therefore, when it is necessary to ensure a high cleaning capacity by flowing a large amount of cleaning water while preventing water hammer, a piston type as shown in FIG. 14 is not used without using such a self-closing type flash valve. A flush valve (toilet bowl cleaning device) of the type in which the main valve 202 is urged in the valve closing direction by a spring 228 and the main valve 202 is forcibly opened from a closed state by a motor via a cam 230 and a push rod 232 is used. It was used.

According to such a flush valve (toilet bowl cleaning device), it is possible to rapidly open and close the main valve 202 consisting of a piston valve with a large stroke by rotating the motor, and the flow rate of the feed water is large. In addition, the rising and falling of the waveforms of the rim cleaning A-1, jet cleaning B, and rim cleaning A-2 in FIG. 13A can be made steep to ensure high cleaning capability. Can do.
Further, by appropriately setting the shape of the cam 230, the speed immediately before the main valve 202 is closed can be made slow, and the occurrence of water hammer can be prevented.

However, this flash valve requires a motor as a drive source and requires a cam 230, a push rod 232, and other power transmission mechanisms for transmitting the force from the motor to the main valve 202, which complicates the structure of the flash valve. End up.
Further, in this flush valve as well, since the main valve 202 is a piston valve, there is a problem of wear of the packing 234 and problems caused by this.

As means for solving these problems, it is conceivable that the main valve in the flash valve is a diaphragm valve, and the sub-valve mechanism shown in FIGS. 9 to 12 is incorporated in the diaphragm valve.
When the main valve is configured as a diaphragm valve, it is possible to increase the speed of opening and closing (it can be changed from fully open to fully closed and fully closed to fully open with a small stroke), while the seat diameter ( By increasing the diameter of the main valve seat) and further increasing the opening / closing movement stroke to a certain extent, it is possible to secure the necessary flow rate for toilet flushing.
However, as described above, in order to provide the auxiliary valve mechanism shown in FIGS. 9 to 12, there is a problem that a large installation space is required in the axial direction, and a flash valve having a small and compact diaphragm valve as a main valve is required. There was a problem that it was difficult to apply.

  Even when the main valve of the flash valve is a diaphragm valve, the time from the opening operation of the start valve to the closing of the auxiliary valve under the auxiliary valve mechanism shown in FIGS. However, there still remains a problem that causes a delay in the opening operation of the main valve.

As other prior art documents for the present invention, there are those described in the following Patent Documents 4 and 5.
Of these, the one described in Patent Document 4 is different from the present invention in that it does not include a spring for holding the auxiliary valve in the closed state under the closed state of the auxiliary valve and the main valve.
Moreover, the thing of patent document 5 has a single water conveyance hole, and differs from this invention provided with the 2nd water conveyance hole in addition to the 1st water conveyance hole.

JP 54-7624 A Japanese Utility Model Publication No. 3-27106 Japanese Patent Laid-Open No. 53-4336 JP-A-2-113187 JP-A-4-68131

  In view of the above circumstances, the present invention provides a flash valve and a flash valve device in which the main valve can be configured compactly and the main valve can be opened quickly without causing a valve opening delay. It was made as a purpose.

Thus, claim 1 relates to a flush valve, comprising: (a) a water supply path; (b) a main valve that opens and closes the water supply path; and (c) formed behind the main valve, A pressure chamber that acts as a pressing force in the valve closing direction with respect to the main valve, and (d) the primary water passage upstream of the main valve in the water supply passage through the main valve and the pressure chamber communicate with each other. A water guide hole comprising a small hole for introducing the water of the water supply channel into the pressure chamber; and (e) a water drainage channel for extracting the water of the pressure chamber into the secondary water channel downstream of the main valve in the water supply channel; (F) a flush valve provided with an activation valve that opens the water drainage path and causes the main valve to open, wherein (a) each as the water introduction hole that opens in the pressure chamber A first water conveyance hole and a second water conveyance hole; (b) a sub-valve assembled to the main valve to open and close the second water conveyance hole; and (c) an assembly to the main valve. A spring that urges the auxiliary valve in the closing direction and holds the auxiliary valve in a closed state under the closed state of the main valve, and (d) during the opening operation of the main valve. Abutting on the sub-valve and opening the sub-valve against the biasing force of the spring as the main valve is further opened, while the main valve is opened from the sub-valve during the closing operation. And a stopper that closes the auxiliary valve by the biasing force of the spring, and under the open state of the auxiliary valve, the auxiliary valve passes through both the first and second water introduction holes. of under closed Ri Nashitea as the water in the water supply passage through one of the first water conducting hole is introduced into the pressure chamber, said main valve includes a diaphragm membrane formed of an elastic material, the A diaphragm valve having a rigid holding member for holding a diaphragm film, and the diaphragm valve constituting the main valve is a first part in which the holding member forms a plate shape. A first member and a second member, and the first member and the second member are fitted and assembled in an axial direction that is the advancing and retreating direction of the diaphragm valve, and the first member and the second member The space which comprises the spring chamber which accommodates the said spring, and the valve accommodating chamber which accommodates the valve part in the said subvalve is formed between these.

According to a second aspect of the present invention, in the first aspect , the spring chamber and the valve accommodating chamber are formed at positions radially inside a main valve seat on which the diaphragm valve is seated.

According to a third aspect of the present invention, in the second aspect , the sub valve is provided coaxially with the diaphragm valve at a central portion in the radial direction of the diaphragm valve.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the holding member is provided with a guide portion that slides along an inner circumferential wall surface of the pressure chamber and guides the opening / closing of the diaphragm valve. It is characterized by that.

A fifth aspect of the present invention relates to a flush valve device. The flush valve according to any one of the first to fourth aspects is provided as a flush valve for toilet rim washing and a flush valve for jet washing, respectively. The toilet rim cleaning and jet cleaning are performed by switching the operation of the flush valve for washing and the flush valve for jet washing.

Effects and effects of the invention

  As described above, the flush valve of the present invention includes the first water guide hole and the second water guide hole as the water guide hole, the sub valve that opens and closes the second water guide hole, the main valve that urges the sub valve in the valve closing direction. A spring that holds the sub-valve in the closed state of the valve, and abuts on the sub-valve during the opening of the main valve. While the valve is opened against the force, a stopper is provided that is separated from the auxiliary valve during the closing operation of the main valve and is closed by the biasing force of the spring. While water in the water supply channel is introduced into the pressure chamber through both the first water conveyance hole and the second water conveyance hole, the water in the water supply channel is introduced into the pressure chamber through only one first water conveyance hole when the sub valve is closed. It was made to let you.

In the flush valve of the present invention, when the main valve is in the closed state, the auxiliary valve is held in the closed state by the biasing force of the spring. Therefore, the conventional flush valve shown in FIGS. Unlike the case where the sub-valve is open when the main valve is opened and the main valve starts opening, the sub-valve is closed on the side opposite to the valve closing direction. There is no need to provide a water chamber or a water channel for guiding the feed water pressure for closing (because the auxiliary valve is held closed by the biasing force of the spring). Therefore, according to the flush valve of the present invention, the auxiliary valve is mounted. The required space for can be a small space.
As a result, the structure of the auxiliary valve mounting portion can be made compact, and the main valve can be made compact accordingly.

  Further, in the flash valve of the present invention, when the main valve is in the closed state, the sub valve is also held in the closed state by the biasing force of the spring, which is different from the conventional flash valve shown in FIGS. Therefore, when the main valve is opened, there is no loss time until the secondary valve in the open state is closed, and there is no problem that the main valve is delayed. Can be immediately and instantaneously opened, and the time required for the amount of the washing water to reach the maximum flow rate can be shortened as much as possible to increase the washing ability.

In the present invention, the wall of the valve body can be used as a stopper that contacts and opens the sub-valve.
In this case, the auxiliary valve can be provided with a valve shaft that protrudes toward the pressure chamber, and a stopper can be brought into contact with the valve shaft, or the auxiliary valve can be configured without a valve shaft. On the other hand, it is also possible to open the auxiliary valve by protruding the stopper from the valve body in the shape of a shaft and bringing the protruding stopper in the shape of the shaft into contact with the valve portion of the auxiliary valve.

The present invention is applied to a main valve comprising a diaphragm valve .

Case where the main valve in a diaphragm valve, is possible to shorten the movement stroke of opening and closing, time to fully open the open-starting by their, shortening the further from the fully open state to reach the valve closing time Therefore, the rising and falling of the flow rate characteristic at the time of toilet cleaning can be made steep and the cleaning ability can be enhanced.

  In addition, in the case of the main valve comprising this diaphragm valve, it is not necessary to slide the packing integrally with the valve when opening and closing, and the wear of the packing causes the occurrence of various problems. The advantage that can solve the problem of becoming.

In the present invention, the rigid holding member of the diaphragm valve that constitutes the main valve has a plate-like first member and a second member, and the first member and the second member are the main valve (diaphragm valve). and assembling the fitting to a moving direction axially, and between the first member and the second member, constituting a spring chamber for accommodating the spring, and a valve chamber for accommodating the valve unit in the sub-valve space to form a contact clause.

  In this way, a space for assembling the spring and the subvalve can be easily formed with respect to the main valve composed of the diaphragm valve, and the subvalve and the spring for energizing it can be easily incorporated into the diaphragm valve. Can do. Furthermore, the assembly structure can be a simple structure.

According to a second aspect of the present invention, the spring chamber and the valve housing chamber formed between the first member and the second member are formed at a position radially inward of the main valve seat on which the main valve made of a diaphragm valve is seated. Is.

  If these spring chambers and valve storage chambers are arranged at positions that overlap in the radial direction with respect to the main valve seat, the axial thickness of the main valve consisting of the diaphragm valve increases at the position overlapping the main valve seat. The movable stroke of the main valve is limited to be small.

  However, the space inside the main valve seat in the radial direction of the main valve seat can be effectively utilized by arranging the storage chambers of the springs and the valve part of the sub-valve in the space inside the main valve seat in the radial direction. And a sub-valve mechanism including a sub-valve and a spring can be incorporated therein.

In this case, the sub-valve may be provided in the diaphragm valve coaxially radially central portion of the diaphragm valve (claim 3).
By doing in this way, a subvalve can be opened and closed stably, and the dispersion | variation in the motion of a subvalve can be prevented.

According to a fourth aspect of the present invention, the holding member and the pressure chamber side are provided with a guide portion that slides along the inner peripheral wall surface of the pressure chamber and guides the opening / closing of the diaphragm valve.
The main valve formed of a diaphragm valve is provided with a guide portion for opening and closing movement, and this guide portion is usually provided inside the cylindrical portion having the main valve seat at the tip portion of the holding member, that is, than the main valve in the water supply channel. It is provided in a state of being fitted into the downstream part (secondary side flow path).
However, in this case, when the diaphragm valve (main valve) is opened, the guide portion becomes an obstacle to the flow of water flowing from the upstream portion to the downstream portion of the main valve seat, and the water flow It will be a hindrance to.

Accordingly, in the fourth aspect of the invention , the guide portion for opening and closing the diaphragm valve is provided on the pressure chamber side and along the inner peripheral wall surface of the pressure chamber. According to the fourth aspect , the diaphragm valve is provided. This eliminates the problem that the guide part that opens and closes the flow obstructs the flow, and allows the flushing water of the toilet bowl to flow smoothly from the upstream part to the downstream part, thereby further improving the cleaning efficiency for toilet flushing. It becomes possible to raise.

Next, a fifth aspect of the present invention relates to a flush valve device, and the flush valve device comprises a flush valve according to any one of the first to fourth aspects, a flush valve for cleaning a toilet rim, and a flush for jet cleaning. Each of the valves is provided as a valve, and the toilet rim cleaning and jet cleaning are performed by switching the operation between the flush valve for rim cleaning and the flash valve for jet cleaning.

In this flush valve device, switching from rim cleaning to jet cleaning or from jet cleaning to rim cleaning can be performed in a short time.
Specifically, it is possible to shorten as much as possible the time from the maximum flow rate in rim cleaning to the start of the next jet cleaning, or the time for switching from the maximum flow rate in jet cleaning to rim cleaning. Become.

Therefore, when the flush valve device according to claim 5 is used, the toilet is cleaned by switching from rim cleaning to jet cleaning and further from jet cleaning to rim cleaning while preventing the occurrence of water hammer due to the sudden closing of the main valve. The cleaning ability can be effectively increased.

  Furthermore, according to this flush valve device, a motor as a drive source and a power transmission mechanism such as a cam and a push rod are not particularly required, and the toilet cleaning device can be constructed at low cost and in a compact manner.

It is the figure which showed the flush valve apparatus of one Embodiment of this invention with the toilet bowl. It is sectional drawing of the flash valve apparatus of FIG. FIG. 3 is a cross-sectional view of a main part of the flush valve for rim cleaning in FIG. 2. It is the figure which showed the principal part of FIG. It is action | operation explanatory drawing of the flash valve of the embodiment. FIG. 6 is an operation explanatory diagram following FIG. 5. FIG. 7 is an operation explanatory diagram following FIG. 6. FIG. 8 is an operation explanatory diagram following FIG. 7. It is the figure which showed an example of the conventional flash valve. FIG. 10 is an operation explanatory diagram of the flash valve of FIG. 9. FIG. 11 is an operation explanatory diagram following FIG. 10. FIG. 12 is an operation explanatory diagram following FIG. 11. It is the figure which showed the waveform of the water supply in the case of toilet bowl washing | cleaning. It is explanatory drawing of another example of the conventional flash valve.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, 10 is a toilet bowl (Western style toilet), 12 is a toilet bowl, and 14 is a rim provided along the peripheral edge of the upper end of the toilet bowl.
A rim water passage 16 is formed inside the rim 14, and a plurality of spray holes 18 communicating with the rim water passage 16 are formed on the lower surface of the rim 14 at a predetermined pitch in the circumferential direction. The washing water in 16 is sprayed into the toilet bowl 12 through the spray holes 18.

20 is a supply pipe for supplying cleaning water (tap water) for cleaning the toilet 10, and the cleaning water supplied through the supply pipe 20 is supplied to the rim water passage 16 through the rim water supply pipe 22, Alternatively, water is supplied to the jet hole 26 through the jet water supply pipe 24.
The washing water supplied to the jet hole 26 is jetted from the jet hole 26 toward the drain trap part 28 of the toilet 10, and the drain trap part 28 is filled with water to assist the siphon action.

A flush valve device 30 as a toilet bowl cleaning device of the present embodiment is disposed on the flow path of the cleaning water supplied through the supply pipe 20.
When flushing the toilet bowl, the flush valve device 30 first supplies water through the rim water supply pipe 22 and sprays cleaning water into the toilet bowl 12 from the spray hole 18 communicating with the rim water passage 16 to perform rim cleaning.
When the rim cleaning is completed, the water supply is switched to the jet water supply pipe 24 side, whereby the cleaning water is jetted from the jet holes 26 to perform the jet cleaning.
Subsequently, the cleaning water is switched again to the rim water supply pipe 22 side to perform rim cleaning, and the toilet cleaning is finished.

FIG. 2 specifically shows the configuration of the flash valve device 30.
As shown in FIG. 2, the flush valve device 30 has a flush valve 32 for rim cleaning and a flush valve 34 for jet cleaning.

In this embodiment, water (cleaning water) flowing in from the inlet 36 flows upward through a common water supply path 40 formed inside the valve body 38 and is supplied to the right side in the figure for rim cleaning. It flows to the water supply path 44 for jet washing branched to the path 42 or the left side in the figure.
The common water supply path 40 is provided with a check valve 39, and the water flowing in from the inflow port 36 pushes the check valve 39 upward in the drawing to open the water supply path for rim cleaning. 42 or the water supply path 44 for jet cleaning.
The rim cleaning water supply passage 42 and the jet cleaning water supply passage 44 are each provided with a constant flow valve 48 for making the flow rate constant.

The water led to the water supply channel 42 for rim cleaning is opened from the primary water channel 42a on the downstream side to the secondary side downstream by opening the main valve 46 consisting of a diaphragm valve provided on the water supply channel 42. It distribute | circulates to the waterway 42b and is provided for the rim washing | cleaning of the toilet bowl 10 of FIG.
Further, the water guided to the jet cleaning water supply channel 44 flows from the upstream primary water channel 44a to the downstream secondary water channel 44b by opening the main valve 46, which is also a diaphragm valve, It is used for jet cleaning of the toilet 10.

FIG. 3 shows in detail the main part of the flush valve 32 for rim cleaning.
In this figure, 50 is a pressure chamber formed on the left side of the main valve 46 in the figure, and this pressure chamber 50 acts on the main valve 46 as a pressing force in the valve closing direction in the right direction in the figure. Let
The main valve 46 is normally kept closed by the pressure in the pressure chamber 50. That is, the main valve seat 54 formed at the tip of the cylindrical portion 52 of the valve body 38 is held in a seated state.

From this pressure chamber 50, a water drain channel 56 for extracting internal water to the secondary side water channel 42 b in the water supply channel 42 extends, and an activation valve 58 made of an electromagnetic valve is provided on the water drain channel 56. It has been.
The start valve 58 includes a plunger valve 60, a spring (coil spring) 62, and an electromagnetic coil 64. Normally, the plunger valve 60 is held closed by the downward biasing force of the coil spring 62 in the figure. Is done. When the electromagnetic coil 64 is energized in this state, the plunger valve 60 is pulled upward in the figure and opened.

When the plunger valve 60 is opened, the water inside the pressure chamber 50 is drawn out to the secondary side water passage 42b through the water drainage passage 56, where the pressure in the pressure chamber 50 disappears and the main valve 46 consisting of a diaphragm valve is opened. The valve is pushed to the left in the drawing by the water supply pressure of the primary water passage 42a in the water supply passage 42 to open the valve.
Then, by opening the main valve 46, the water in the primary side water passage 42a flows into the secondary side water passage 42b and is further supplied to the toilet 10 on the downstream side thereof, so that the rim cleaning of the toilet 10 is performed.

FIG. 4 specifically shows a more detailed configuration of the main valve 46 formed of a diaphragm valve.
As shown in the figure, the main valve 46 includes a diaphragm film 66 made of an elastic material and a resin-made hard holding member 68 for holding the diaphragm film 66, and the outer peripheral portion of the diaphragm film 66 is the entire circumference. The center portion is fixed to the valve body 38 and moved forward and backward with a predetermined stroke in the vertical direction in FIG. 4 (left and right direction in FIG. 3).
In the case of a main valve composed of a conventional piston valve, the total travel stroke is about 8 mm, but here the total travel stroke of the main valve 46 composed of a diaphragm valve is about 4 mm.

The main valve 46 has a first water introduction hole 70 and a second water introduction hole 72, which are small holes, through which water in the primary side water passage 42 a in the water supply passage 42 is introduced into the pressure chamber 50. And a form penetrating the main valve 46.
The first water introduction hole 70 of one of these water introduction holes is always open, and the second water introduction hole 72 is provided with a sub-valve 74. The two water guide holes 72 are opened and closed.

The sub-valve 74 has a plate-like valve portion 76 that extends in a direction perpendicular to the axial direction of the main valve 46, and a valve shaft 78 that protrudes upward in the figure from the central portion thereof.
One end (upper end in FIG. 4) of a spring (coil spring) 82 accommodated in the spring accommodating chamber 80 is brought into contact with the valve portion 76 of the sub valve 74, and the biasing force of the spring 82 is applied to the sub valve 74. In FIG.

The auxiliary valve 74 is held in the closed state based on the biasing force of the spring 82 at the normal time, that is, when the main valve 46 is closed.
Specifically, the valve portion 76 is held in a state of being seated on the sub valve seat formed around the second water introduction hole 72 of the holding member 68 via the seal member 83.
The valve portion 76 is accommodated in a valve accommodating chamber 84 formed continuously with the spring accommodating chamber 80, and the valve portion 76 is held in the valve accommodating chamber 84 in the vertical direction in FIG. That is, it is moved relative to the main valve 46.
The sub valve 74 is in a state in which the valve shaft 78 protrudes from the second water guide hole 72 toward the pressure chamber 50 in the closed state.

In this embodiment, the first water conveyance hole 70 and the second water conveyance hole 72 are configured such that the water channel on the water inlet 86 side of the primary side water channel 42a is a common water channel, and the water channel on the outlet side on the pressure chamber 50 side is a common water channel. It has a dedicated waterway that branches off along the way.
Specifically, a water passage that penetrates the diaphragm film 66 in the film thickness direction following the inlet 86 and an annular water passage 88 around the spring accommodating chamber 80 are a common water passage, and the water passages on the pressure chamber 50 side that follow this branch into each other. It has a dedicated waterway.

The holding member 68 made of the hard resin is composed of a first member 68-1 and a second member 68-2 each having a circular plate shape.
The first member 68-1 is formed with a male fitting surface 90, and the second member 68-2 is formed with a female fitting surface 92. The first member 68-1 and the second member 68-2 However, the male fitting surface 90 and the female fitting surface 92 are assembled to each other in a fitted state.

As shown in FIG. 4C, the first member 68-1 is provided with a locking claw 94 projecting outward in the radial direction, and the locking action of the locking claw 94 is provided. Thus, the first member 68-1 is prevented from coming off from the second member 68-2.
The first member 68-1 and the second member 68-2 form a space in the radial center portion, specifically, the radial inner side of the main valve seat 54, and the space is continuous with each other. The spring accommodating chamber 80 and the valve accommodating chamber 84 are configured.

The sub-valve 74 is disposed at the center of the main valve 46 in the radial direction, and the valve shaft 78 projects toward the pressure chamber 50 at the center.
In FIG. 3, reference numeral 96 denotes a stopper facing the valve shaft 78 in the axial direction of the main valve 46, and the stopper 96 is constituted by a wall of the valve body 38.

The second member 68-2 in the main valve 46 has a flange portion that protrudes radially outward at the end on the pressure chamber 50 side, and this flange portion is the inner portion of the pressure chamber 50. The guide portion 100 slides along the peripheral wall surface 98 and serves as an open / close guide for the main valve 46.
Further, the central portion of the second member 68-2 and the lower surface side in FIG. 4 has a substantially inverted truncated cone shape protruding in the opposite direction to the valve closing direction of the main valve 46 at the radially inner position of the main valve seat 54. The protrusion 102 is integrally formed.

  The jet cleaning flush valve 34 has basically the same configuration as that of the rim cleaning flash valve 32. Here, the jet cleaning flash valve 34 is shown only by a reference numeral, and detailed description thereof is omitted.

Next, the operation of the flash valve device 30 of this embodiment will be described below.
In this embodiment, the flash valve device 30 is normally in a state in which the main valve 46 is closed in both the rim cleaning flash valve 32 and the jet cleaning flash valve 34 as shown in FIGS. .
The sub valve 74 incorporated in the main valve 46 is also held in the closed state by the biasing force of the spring 82.

When an operation unit (not shown) is operated in this state, first, the start valve 58 of the flush valve 32 for rim cleaning is opened as shown in FIG.
When the start valve 58 is opened, the drainage channel 56 communicating with the pressure chamber 50 is opened, and the water inside the pressure chamber 50 flows out through the drainage channel 56 to the secondary water channel 42 b. Here, since the pressure in the pressure chamber 50 disappears, the main valve 46 starts to open by the supply water pressure of the primary side water passage 42a in the water supply passage 42 (the start valve 58 closes after the pressure disappears).
At this time, in this embodiment, the sub valve 74 is in a closed state, and the water in the primary side water passage 42a does not leak to the pressure chamber 50 side through the second water guide hole 72. Therefore, the main valve 46 is opened. The valve opens quickly without any delay.

Thus, when the main valve 46 moves backward by a certain amount to the left in FIG. 3 in the initial stage of valve opening, the stopper 96 formed by the wall of the valve body 38 with respect to the valve shaft 78 of the sub valve 74 is 78, the sub valve 74 is opened by the stopper 96 against the urging force of the spring 82 as the main valve 46 further moves backward in the valve opening direction as shown in FIG. The second water introduction hole 72 is opened.
During the valve opening operation, the main valve 46 is moved and guided by the guide portion 100 that slides along the inner peripheral wall surface 98 of the pressure chamber 50, and smoothly opens the valve.
As shown in FIG. 6, the main valve 46 is then fully opened by the supply water pressure of the primary side water passage 42a until the main valve 46 is fully opened, and the water supply passage 42 is opened widely to supply a large amount of water for rim cleaning to the toilet 10 side. Supply water and clean the rim.
In the fully opened state of the main valve 46, the auxiliary valve 74 is in the maximum opened state.
In the present invention, it is possible to bring the auxiliary valve 74 into contact with the bottom of the spring accommodating chamber 80 in its maximum open state, but in this embodiment, the auxiliary valve 74 is shown in FIG. As shown, a slight gap is secured between the auxiliary valve 74 and the bottom of the spring accommodating chamber 80 for safety.

In this embodiment, when the auxiliary valve 74 is opened, the water in the primary side water passage 42 a that has been introduced into the pressure chamber 50 only through the first water introduction hole 70 until then is also pressurized through the second water introduction hole 72. As it is introduced into the chamber 50, the amount of water introduced into the pressure chamber 50 is rapidly increased here.
Then, as shown in FIG. 7, after the main valve 46 reaches the maximum opening position, the opening of the start valve 58 is closed after the main valve 46 has been opened due to the pressure of water introduced into the pressure chamber 50. The valve closing operation is quickly started later, and the speed of the valve closing operation itself is also accelerated by the introduction of water into the pressure chamber 50 through the first water introduction hole 70 and the second water introduction hole 72.

When the main valve 46 closes to the position close to the main valve seat 54, that is, just before the main valve 46 closes, the valve shaft 78 of the sub valve 74 comes away from the stopper 96 as shown in FIG. Here, the auxiliary valve 74 is closed again by the biasing force of the spring 82.
After the auxiliary valve 74 is closed and the second water guide hole 72 is closed, the water in the primary side water passage 42a is introduced into the pressure chamber 50 only through the first water guide hole 70, where the pressure is The speed of water introduction into the chamber 50 is slowed down.
That is, the main valve 46 is slowly closed after the sub-valve 74 is closed, and finally the main valve 46 is seated on the main valve seat 54 to be in a completely closed state shown in FIG.

As described above, when the main valve 46 of the flush valve 32 for rim cleaning reaches the fully closed state, the start valve 58 of the flush valve 34 for jet cleaning is automatically opened. The main valve 46 of the flush valve 34 for washing is opened, and water for jet washing is supplied to the toilet bowl 10.
The operation at that time is the same as the above-described operation in the flush valve 32 for rim cleaning.

Thus, when the main valve 46 of the flush valve 34 for jet cleaning reaches the closing valve, the start valve 58 of the flush valve 32 for rim cleaning is further opened, and then the main valve 46 is opened. And toilet rim cleaning is performed again.
When the second rim cleaning is completed, the flash valve device 30 finally ends its operation.

In the flush valves 32 and 34 of the present embodiment as described above, when the main valve 46 is in the closed state, the auxiliary valve 74 is held in the closed state by the urging force of the spring 82. Unlike the conventional flush valve shown in FIG. 1, that is, the sub valve is open when the main valve is closed, and the sub valve is closed by the feed water pressure when the main valve starts to open. It is not necessary to provide a water chamber or a water channel for guiding the feed water pressure for closing the auxiliary valve 74 on the side opposite to the valve closing direction of the valve 74. Therefore, according to the flush valve 32 of this embodiment, the auxiliary valve 74 is attached. The required space for can be a small space.
Thereby, the structure of the auxiliary valve 74 mounting portion can be made compact, and accordingly, the main valve 46 formed of a diaphragm valve can be made compact.

  Further, in the flush valves 32 and 34 of the present embodiment, when the main valve 46 is in the closed state, the auxiliary valve 74 is also held in the closed state by the biasing force of the spring 82. Unlike the conventional flush valve shown in the figure, when the main valve 46 is opened, the time until the sub valve in the open state is closed is a loss time, and the problem that the valve opening operation of the main valve 46 is delayed does not occur. The main valve 46 can be opened immediately and instantaneously after the start valve 58 is opened, and the time until the amount of the washing water reaches the maximum flow rate can be shortened as much as possible. Can be increased.

  In the present embodiment, since the main valve 46 is configured as a diaphragm valve, the opening / closing movement stroke of the main valve 46 can be shortened, whereby the time from the start of the valve opening to the full opening, and further from the fully open state to the valve closing. Time can be shortened, and the rising and falling of the flow rate characteristic at the time of washing the toilet 10 can be made steep and the washing ability can be enhanced.

  In addition, in the case of the main valve 46 comprising the diaphragm valve, it is not necessary to slide the packing integrally with the main valve 46 when the valve is opened and closed, and the wear of the packing causes various problems. The problem of causing the problem can be solved.

In this embodiment, the rigid holding member 68 of the diaphragm valve constituting the main valve 46 is composed of a plate-like first member 68-1 and a second member 68-2, and the first member 68-1 The second member 68-2 is fitted and assembled in the axial direction that is the advancing / retreating direction of the main valve 46 (diaphragm valve), and a spring is accommodated between the first member 68-1 and the second member 68-2. The space which comprises the chamber 80 and the valve storage chamber 84 is formed, By doing in this way, the assembly space of the spring 82 and the subvalve 74 can be easily formed with respect to the main valve 46 which consists of a diaphragm valve, Further, the auxiliary valve 74 and the spring 82 for urging the auxiliary valve 74 and the main valve 46 can be easily incorporated.
Furthermore, the assembly structure can be a simple structure.

  Further, the spring accommodating chamber 80 and the valve accommodating chamber 84 formed between the first member 68-1 and the second member 68-2 are located at the radially inner position of the main valve seat 54 on which the main valve 46 is seated. Since it is formed, the space inside the main valve seat 54 in the radial direction of the main valve 46 formed of a diaphragm valve can be effectively utilized, and a sub valve mechanism including the sub valve 74 and the spring 82 can be incorporated therein. .

  Further, since the auxiliary valve 74 is provided coaxially with the main valve 46 at the radial center of the main valve 46, the auxiliary valve 74 can be stably opened and closed, and variations in the movement of the auxiliary valve 74 can be prevented. Can do.

By the way, in the case of using a diaphragm valve as a main valve, the guide portion 100 at the time of opening and closing the main valve is usually fitted into the holding member 68 and inside the cylindrical portion 52 having the main valve seat 54 at the tip portion. Provided.
However, when this is done, when the diaphragm valve (main valve) is opened, the guide portion becomes an obstacle to the flow of water flowing from the upstream portion of the main valve seat 54 toward the downstream portion, It will be a hindrance to the flow.

  However, in this embodiment, since the guide portion 100 is provided on the pressure chamber 50 side and slides along the inner peripheral wall surface 98 of the pressure chamber 50, the guide portion 100 does not hinder the flow and the toilet bowl is provided. The water which becomes 10 washing water can be smoothly flowed from the upstream part toward the downstream part, and the washing efficiency of the toilet 10 washing can be further enhanced.

  Furthermore, in the flash valve device 30 of the present embodiment, the time from the maximum flow rate in the rim cleaning to the start of the next jet cleaning, or the time for switching from the maximum flow rate in the jet cleaning to the rim cleaning is allowed. The cleaning ability when performing toilet cleaning by switching from rim cleaning to jet cleaning and from jet cleaning to rim cleaning while preventing the occurrence of water hammer due to the sudden closing of the main valve 46 can be shortened. Can be effectively increased.

  Further, according to the flash valve device 30, a motor as a driving source and a power transmission mechanism such as a cam and a push rod are not particularly required, and the toilet cleaning device can be configured at low cost and in a compact manner.

  Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various forms without departing from the spirit of the present invention.

22 Rim water supply path 24 Jet water supply path 30 Flash valve device 32 Flush valve for rim cleaning 34 Flush valve for jet cleaning 38 Valve body 42 Water supply path for rim cleaning 42a, 44a Primary side water path 42b, 44b Secondary side water path 44 Water supply path for jet cleaning 46 Main valve 54 Main valve seat 56 Water drainage path 58 Start valve 66 Diaphragm film 68 Holding member 68-1 First member 68-2 Second member 70 First water introduction hole 72 Second water introduction hole 74 Sub Valve 76 Valve portion 80 Spring accommodating chamber 82 Spring (coil spring)
84 Valve storage chamber 96 Stopper 98 Inner peripheral wall surface 100 Guide portion

Claims (5)

(A) a water supply path, (b) a main valve that opens and closes the water supply path, and (c) a pressure that is formed behind the main valve and that acts as a pressing force in the valve closing direction on the main valve. And (d) a small passage through which the primary water passage upstream of the main valve in the water supply passage communicates with the pressure chamber and introduces water in the water supply passage into the pressure chamber. A water introduction hole comprising a hole; (e) a water drainage channel for extracting water from the pressure chamber to a secondary water channel downstream of the main valve in the water supply channel; and (f) the main valve by opening the water drainage channel. A start valve for starting the valve opening operation, and a flash valve,
(A) a first water guide hole and a second water guide hole as the water guide holes, each of which opens in the pressure chamber;
(B) a sub-valve assembled to the main valve to open and close the second water conveyance hole;
(C) a spring assembled to the main valve to urge the sub valve in the valve closing direction and hold the sub valve in a closed state under the closed state of the main valve;
(D) the main valve abuts on the sub valve during the valve opening operation, and the sub valve is opened against the urging force of the spring in accordance with the further valve opening operation of the main valve, A stopper that is separated from the auxiliary valve during the closing operation of the main valve and closes the auxiliary valve by the biasing force of the spring;
When the auxiliary valve is in the open state, the first water supply hole and the second water supply hole are both open. In the closed state of the auxiliary valve, the first water supply hole is provided through the first water supply hole. Ri Nashitea to introduce water into said pressure chamber,
The main valve is a diaphragm valve having a diaphragm film made of an elastic material and a hard holding member for holding the diaphragm film,
The diaphragm valve constituting the main valve has a first member and a second member in which the holding member has a plate shape, and the first member and the second member are shafts in which the diaphragm valve is advancing and retracting. Fitted and assembled in the direction,
A space is formed between the first member and the second member so as to form a spring chamber that houses the spring and a valve housing chamber that houses a valve portion of the sub-valve. valve. 2. The flush valve according to claim 1 , wherein the spring chamber and the valve housing chamber are formed at positions radially inside a main valve seat on which the diaphragm valve is seated. 3. The flush valve according to claim 2 , wherein the auxiliary valve is provided coaxially with the diaphragm valve at a radial center portion of the diaphragm valve. Flush valve which in one of claims 1 to 3, the holding member slides along the inner peripheral wall surface of the pressure chamber, wherein the guide portion for opening and closing guide the diaphragm valve is provided . The flush valve according to any one of claims 1 to 4 is provided as a flush valve for toilet rim cleaning and a flush valve for jet cleaning, respectively, and the flush valve for rim cleaning and the flash for jet cleaning are provided. A flush valve device characterized in that toilet rim cleaning and jet cleaning are performed by switching the operation of the valve.

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