JP2001081827A - Opening and closing valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening and closing valve capable of flowing water at a large flow rate and at a small flow rate and producing no dead water. SOLUTION: This opening and closing valve includes main channels 6c, 7c connected to a water supply pipe to flow water at a large flow rate, a sub- channel 21b connected to the water supply pipe to flow water at a small flow rate, pistons 11, 17 capable of opening and closing the main channels 6c, 7c, and a sub-valve element 25 capable of opening and closing the sub-channel 21b, and communicating paths 11a, 17a forming a part of the sub-channel penetrate the pistons 11, 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-off valve for supplying and stopping water supply. This on-off valve is suitable for use in, for example, a tankless toilet which is a flush toilet without a toilet flush tank.

[0002]

2. Description of the Related Art For example, a general on-off valve employed in a flush toilet or the like has a primary side connected to a water supply pipe such as a water pipe and a secondary side connected to a toilet body so that water can flow at a large flow rate. It has a main waterway and a main valve element for opening and closing the main waterway. In such a flush toilet using such an on-off valve, if the main water channel is opened by opening the main valve body, the water in the water supply pipe is supplied to the toilet body at a large flow rate, and the toilet body can be washed.

[0003]

However, in the above-mentioned conventional on-off valve, a large flow rate of water can only flow when the main water passage is opened by the main valve body. For this reason, for example, in order to prevent the freezing of the water supply channel to the water supply pipe such as a water pipe or the toilet body or the freezing of the trap of the toilet body at the time of cold and to realize an inexpensive maintenance fee, a small amount of water is flowed. Can not do. In this regard, while using such an on-off valve,
Even if a sub-opening / closing valve provided with a sub-channel that allows water to flow at such a small flow rate and a sub-valve element that opens and closes the sub-channel is separately provided, the main on-off valve and the sub-on-off valve are simply connected. If it is merely performed, dead water is likely to be generated in the vicinity of the main valve body, and there is a possibility that dead water is contaminated or frozen.

The present invention has been made in view of the above-mentioned conventional circumstances, and it is an object of the present invention to provide an on-off valve which can flow water at a large flow rate and a small flow rate and does not generate dead water. It is an issue.

[0005]

SUMMARY OF THE INVENTION An on-off valve according to the present invention comprises a main water passage connected to a water supply pipe for allowing water to flow at a large flow rate, and a sub-channel connected to the water supply pipe for allowing water to flow at a small flow rate. A waterway, a main valve body capable of opening and closing the main waterway, and a sub-valve body capable of opening and closing the sub-waterway, wherein the sub-waterway penetrates the main valve body.

In the on-off valve according to the present invention, a large amount of water can be caused to flow when the main water passage is opened by the main valve body, and when the main water passage is closed by the main valve body and when the sub water passage is opened by the sub-valve body. A small flow of water can flow. For this reason, for example, it is possible to prevent freezing of a water supply pipe such as a water pipe or a water supply channel leading to a toilet body or freeze a trap of the toilet body in cold weather, and realize an inexpensive maintenance fee.

Further, in the on-off valve of the present invention, since the sub-water passage penetrates the main valve body, dead water is hardly generated near the main valve body as long as a small amount of water is flowing, and the dead water is contaminated and frozen. There is no risk of occurrence. In the case where the main waterway is connected to the water supply pipe and the sub waterway is also connected to the water supply pipe, means for branching the main waterway and the auxiliary waterway from the water supply pipe can be adopted. When the sub-channel is penetrated through the main valve body, if the water inlet of the sub-channel is not the primary terminal end of the main channel, the main valve is closed when the main channel is closed and the sub-valve is closed. When the sub-canal is opened, dead water is generated between the vicinity of the water inlet of the sub-canal and the primary end of the main canal. For this reason, the water inlet of the sub-channel is preferably connected to the primary terminal of the main channel. In this case, even when the main waterway is closed by the main valve body and when the sub-waterway is opened by the sub-valve body, dead water does not occur between the vicinity of the inlet of the sub-waterway and the terminal end on the primary side of the main waterway. Thus, the effects of the present invention are further exhibited.

[0008] The primary side of the main channel can be connected to a water supply pipe, and the secondary side of the main channel and the secondary side of the sub channel can be connected to the toilet body. Thereby, a tankless toilet which is a flush type toilet having no toilet washing tank can be realized. Also,
Water can be discharged from the sub-channel at a flow rate that can prevent freezing on the upstream side of the toilet body or freezing of the trap of the toilet body. Thereby, in the flush toilet including the tankless toilet, freezing of water on the upstream side of the toilet body or freezing of the trap of the toilet body can be prevented.

The on-off valve according to the present invention is connected to a water inlet port connected to a water supply pipe, a main waterway and a sub-waterway connected to the water inlet port, and connected to the main waterway via a main valve body. It is possible to adopt a housing in which a water passage is formed with a water outlet port connected via a sub-valve. In the on-off valve having such a housing, the main valve mechanism including the main waterway and the main valve body and the sub-valve mechanism including the sub-waterway and the sub-valve element are integrated with each other. Becomes unnecessary, and cost reduction can be realized.

The main valve element is provided so as to be slidable in the axial direction within the housing, and slides to one side in the axial direction to seat on the seat surface of the housing to close the communication with the main water passage.
A piston that slides to the other side in the axial direction and separates from the seat surface to open communication with the main water channel can be employed. The piston may be provided with a shaft projecting from the housing and sliding the piston in the axial direction while opposing the biasing means. In this case, the valve closing / opening speed can be arbitrarily set by the operation of the piston, so even if water flows at a large flow rate, sudden valve closing can be prevented, preventing the occurrence of water hammer. In addition, noise and the like can be suppressed. Also,
Even with a small piston, the operation can sufficiently open the valve at low pressure of water, so it is hard to cause pressure loss, and it does not necessarily increase in size, and exhibits excellent mountability to flush toilets etc. Can be.

The shaft may be driven manually, but is preferably driven based on an electric signal. This is because if a shaft driven based on an electric signal is employed, the on-off valve is automatically opened and closed, which is convenient. In the housing, a pressure canceling chamber formed on the other side of the piston and an axially extending through the piston communicate with one side of the piston and the pressure canceling chamber, and the piston moves from the water in the main water passage to the other side. And a communication passage for canceling the received pressure. In this case, the slidability of the piston in the axial direction is ensured, the operation responsiveness is stabilized, and for example, the reliability of the washability when used in a flush toilet can be improved. Further, water existing on one side of the piston from the water inlet port or the water outlet port moves to the pressure canceling chamber via the communication passage, and the pressure of the water in the pressure canceling chamber and the pressure of the water on one side of the piston are balanced. As a result, the pressure difference between the two is eliminated or reduced. Then, the sub waterway can include this communication path.

The main waterway and main valve body for the rim and the main waterway and main valve body for the jet can be assembled with a common water inlet port. In this case, the on-off valve for the rim and the on-off valve for the jet are integrated, so that the mountability to a flush toilet or the like is excellent, and the piping is not required, so that the cost can be reduced. In this case, a single inlet of the sub-channel can be connected to its main channel, and two outlets of the sub-channel can be connected to the rim water port and the jet water port.

The sub-valve may be driven based on an electric signal, but is preferably manually operable. Anything that can be manually operated is inexpensive. It is difficult to make a constant small flow of water flow only by the diameter of the sub-channel because the pressure of the water in the water supply pipe tends to fluctuate. For this reason, it is preferable that a constant flow valve mechanism that can flow a constant small flow of water irrespective of the internal water pressure is provided in the sub waterway. As the constant flow valve mechanism, a known mechanism using an elastic rubber or the like whose opening degree changes according to pressure can be adopted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. In the embodiment, the present invention is embodied in a tankless toilet having no toilet wash tank as a flush toilet. In this tankless toilet,
As shown in FIG. 1, a flexible hose 3 is connected to a water supply pipe 1 such as a water pipe via a water stopcock 2, and the flexible hose 3 is connected to a toilet cleaning device 5 provided in a toilet body 4.

As shown in FIG. 2, the toilet flushing device 5 includes an on-off valve 6 for a jet connected to the flexible hose 3.
An on-off valve 7 for a rim fixed integrally with the on-off valve 6,
A flow opening / closing valve 21 fixed integrally with the opening / closing valve 7, a cam device 8 fixed to the upper ends of the opening / closing valves 6, 7, and a motor device 9 for driving the cam device 8 adjacent to the cam device 8. have. The motor device 9 is electrically connected to the controller 10.

As shown in FIG. 3, the on-off valve 6 for the jet has a water inlet port 6b opened on the side surface of a vertically long housing 6a, and the flexible hose 3 is connected to the water inlet port 6b. A main water passage 6c connected to the water inlet port 6b and extending upward at the center across the width direction is formed in the housing 6a. As shown in FIG. 2, the upper end of the main waterway 6c is a water outlet port 6d that opens to the side surface of the housing 6a. Outlet port 6d is for jet conduit 1
5, and the jet conduit 15 is connected to a jet nozzle (not shown) provided in the toilet body 4 as shown in FIG.

As shown in FIG. 3, the on-off valve 6 for the jet
A piston 11 as a main valve body is provided slidably up and down in the housing 6a. A pressure canceling chamber 12 is formed below the piston 11. A seating surface 6e on which the upper end of the piston 11 can be seated is formed in the main waterway 6c,
The piston 11 is urged toward the seat surface 6e by a spring 13 provided in the pressure canceling chamber 12 as urging means. The piston 11 has a plurality of communication passages 11a extending vertically and communicating the main water passage 6c and the pressure canceling chamber 12 with each other. A shaft 14 extending upward is fixed to an upper end of the piston 11, and the shaft 14 is driven up and down by a cam device 8 shown in FIG. Further, a small hole 6f communicating with the pressure canceling chamber 12 and having a smaller diameter than the main water passage 6c is formed at a lower end of the housing 6a.

The opening / closing valve 7 for the rim is also provided as shown in FIG.
A water inlet port 7b is opened on a side surface of the vertically long housing 7a, and the water inlet port 7b is connected to a main water passage 6 of an on-off valve 6 for a jet.
c. A main water passage 7c is formed in the housing 7a, which is connected to the water inlet port 7b, extends in the width direction, and then extends upward at the center. As shown in FIG. 2, the upper end of the main water channel 7c is a water outlet port 7d that opens to the side surface of the housing 7a. The water outlet port 7d is connected to a rim conduit 16, and the rim conduit 16 is connected to a rim water passage (not shown) of the toilet body 4, as shown in FIG.

As shown in FIG. 3, a piston 17 as a main valve body is also slidably provided in the housing 7a of the on-off valve 7 for the rim, and a pressure canceling chamber is provided below the piston 17. 18 are formed. A seat surface 7e on which the upper end of the piston 17 can be seated is formed in the main water passage 7c. The piston 17 is urged toward the seat surface 7e by a spring 19 provided in the pressure canceling chamber 18 as urging means. Main waterway 7
c is a water inlet 22 which extends in the width direction so as to cross the housing 7a and constitutes a part of a sub waterway described later. That is, the water inlet 22 of the sub-channel is connected to the primary terminal of the main channels 6c and 7c. The piston 17 also has a plurality of communication passages 17a that extend vertically and communicate with the main water passage 7c and the pressure canceling chamber 18. A shaft 20 extending upward is also fixed to the upper end of the piston 17, and this shaft 20 is also driven up and down by the cam device 8 shown in FIG. The cam device 8 is driven by a motor device 9, and the motor device 9 is driven by a controller 10 based on an electric signal. Further, a small hole 7f communicating with the pressure canceling chamber 18 and having a smaller diameter than the main water passage 7c is formed at a lower end of the housing 7a.

As shown in FIG. 3, the on-off valve 21 for flow has a short, horizontally long housing 21a. The housing 21a communicates with the inlet of the sub-channel 22, and the main channel 7
A small hole 21b having a small diameter is formed, and the same small holes 21c and 21d communicating with the small holes 6f and 7f via the pipes 23 and 24 are formed. These small holes 21
b, 21c, and 21d are connected by a valve chamber 21e extending in the lateral direction. A sub-valve 25 is screwed into the valve chamber 21e so as to be manually operable, and the degree of opening of the small holes 21c and 21d can be adjusted by the screwed position of the sub-valve 25. The constant flow valve mechanisms 26 and 27 are connected to the pipes 23 and 24.

Thus, in these on-off valves 6, 7, and 21, the main water passage 6c and the piston 11 for the rim and the main water passage 7c and the piston 17 for the jet are assembled with the water inlet port 6b in common. Thereby, the on-off valve 7 for the rim and the on-off valve 6 for the jet are integrated, so that the mountability to the tankless toilet is excellent and the piping is not required, so that the cost can be reduced. The single water inlet 22 of the sub waterway is connected to the main waterway 7c, and the communication paths 11a and 17a forming the two water outlets of the sub waterway are connected to the rim water port 6d and the jet water port 7d. It is connected.

In each of the on-off valves 6, 7, and 21, the water inlet 22, the small hole 21b, the valve chamber 21e, the small hole 21c, the pipe 23, the small hole 6f, the pressure canceling chamber 12, and the communication passage 11a are one.
The sub-canal of the book is constituted, the water inlet 22, the small hole 21b, the valve chamber 2
1e, small hole 21d, pipe 24, small hole 7f, pressure canceling chamber 1
8 and the communication passage 17a constitute another sub waterway. These sub-channels are adjusted by adjusting the screwing position of the sub-valve element 25 and the functions of the constant flow valve mechanisms 26 and 27.
It is possible to discharge water at a flow rate capable of preventing freezing on the upstream side of the toilet body 4 or freezing of a trap (not shown) of the toilet body 4.

Further, in these open / close valves 6, 7, 21:
The housings 6a, 7a and 21a are joined together to form a single housing. Therefore, in these on-off valves 6, 7, 21 the main water passages 6c, 7c and the piston 1
The main valve mechanism composed of the sub-valves 1 and 17 and the sub-valve mechanism composed of the sub-water passage 22 and the like and the sub-valve element 25 are integrated, so that it is excellent in mountability to a tankless toilet and piping is not required, thereby reducing cost. realizable.

The on-off valves 6, 7, 2 constructed as described above
In the tankless toilet provided with 1, the main water passage 7 c is first opened by the piston 17 by the input of the switch, a large amount of water flows into the rim water passage of the toilet body 4, and the toilet bowl is washed. Next, the main water passage 6c is
Is released, and a large amount of water flows to the jet nozzle provided in the toilet body 4, forcing a siphon effect. Thereafter, the main water passage 7c is opened again by the piston 17, and a large amount of water flows into the rim water passage of the toilet body 4, so that the toilet bowl can be sealed.

In cold weather, the piston 11,
When the main water channel 17 closes the main water channels 6c and 7c for a long period of time, by opening the sub water channel by the sub valve body 25, a small amount of water can flow to the rim water channel and / or the jet nozzle. For this reason, it is possible to prevent freezing of the water supply channel leading to the water supply pipe 1 and the toilet main body 4 in a cold state or to prevent freezing of the trap of the toilet main body 4 and the downstream side thereof, and an inexpensive maintenance fee.

Further, in these on-off valves 6, 7, 21:
A communication passage 11a in which a sub water passage penetrates the pistons 11 and 17;
17a, dead water hardly occurs near the pressure governor's chambers 11 and 18 and the pistons 11 and 17 as long as a small amount of water is flowing. In particular, the inlet 22 of the sub-canal is the main canal 6
Since it is connected to the primary terminal of c and 7c, dead water does not occur between the vicinity of the water inlet 22 of the sub-channel and the primary terminal of the main channels 6c and 7c. Therefore, there is no possibility of causing dead water contamination and freezing.

Further, in these on-off valves 6, 7, 21:
The slidability of the pistons 11 and 17 in the axial direction is ensured, the operation responsiveness is stabilized, and the reliability of the tankless toilet with respect to the cleaning performance can be improved. In addition, piston 11 from water inlet port 6b or water outlet port 6d, 7d,
The water existing on one side of 17 moves to the pressure cancellation chambers 12 and 18 via the communication passages 11a and 17a,
The pressure of the water in 18 and the pressure of the water on one side of the pistons 11 and 17 are balanced, and the pressure difference between them is eliminated or reduced.

In the above embodiment, a part of the sub-channel is constituted by the pipes 23 and 24.
a, 7a. In this case, the constant flow valve mechanism can also be built in the housings 6a and 7a.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a tankless toilet according to an embodiment.

FIG. 2 is a schematic rear view of the toilet cleaning device for a tankless toilet according to the embodiment.

FIG. 3 is a cross-sectional view of an on-off valve and the like of the tankless toilet according to the embodiment.

[Explanation of symbols]

6, 7, 21 ... on-off valve 1 ... water supply pipe 6c, 7c ... main waterway 22, 21b, 21e, 21c, 21d, 23, 24,
6f, 7f, 12, 18, 11a, 17a...
2 ... water inlet, 21b, 21c, 21d, 6f, 7f ... small hole, 21e ... valve room, 23, 24 ... piping, 12, 18 ... pressure offset chamber, 11a, 17a ... communication passage, water outlet) 11, 17 ... Main valve element (piston) 25 ... Sub valve element 4 ... Toilet bowl body 6b ... Water inlet port 6d, 7d ... Water outlet port 6a, 7a, 21a ... Housing 6e, 7e ... Seat surface 13,19 ... Biasing means (spring) 14 , 20 ... shaft 26, 27 ... constant flow valve mechanism

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yasuhiro Shirai 5-1-1 Koiehonmachi, Tokoname-shi, Aichi F-term in Inax Co., Ltd. (Reference) 2D039 CB01 DB01 3H060 AA09 BB05 CC38 CC40 DA04 DC05 DC08 EE08 HH03 HH11

Claims (11)

[Claims] 1. A main waterway connected to a water supply pipe for flowing water at a large flow rate, a sub waterway connected to the water supply pipe for flowing water at a small flow rate, and a main waterway capable of opening and closing the main waterway. An on-off valve comprising a valve element and a sub-valve element capable of opening and closing the sub-water path, wherein the sub-water path penetrates the main valve element. 2. The on-off valve according to claim 1, wherein an inlet of the sub-channel is connected to a terminal end on a primary side of the main channel. 3. The water supply pipe according to claim 1, wherein the primary side of the main waterway is connected to a water supply pipe, and the secondary side of the main waterway and the secondary side of the auxiliary waterway are connected to the toilet body. On-off valve. 4. The on-off valve according to claim 1, wherein the secondary water channel discharges water at a flow rate capable of preventing freezing on the upstream side of the toilet body or freezing of a trap of the toilet body. . 5. A water inlet port connected to a water supply pipe, a main waterway and a sub-waterway connected to the water inlet port, and a sub-waterway connected to the main waterway through a main valve body. 5. A housing having a water outlet port connected thereto via a valve body.
On-off valve as described. 6. The main valve body is provided slidably in the axial direction within the housing, and slides to one side in the axial direction to seat on the seat surface of the housing to close communication with the main water passage. A piston which slides to the other side in the axial direction to separate from the seat surface to open the communication with the main water passage, and the piston protrudes from the housing and faces the urging means while being opposed to the urging means. The on-off valve according to claim 5, further comprising a shaft for sliding the piston in the axial direction. 7. The valve according to claim 6, wherein the shaft is driven based on an electric signal. 8. A housing having a pressure canceling chamber formed on the other side of the piston and an axially extending through the piston.
A communication passage communicating with one side of the piston and the pressure canceling chamber, wherein the piston cancels a pressure received from water in a main water passage to the other side, and a sub-water passage includes the communication passage. The on-off valve according to claim 6 or 7, wherein 9. A main waterway and a main valve body for a rim and a main waterway and a main valve body for a jet are assembled with a common water inlet port, and a single water inlet of a sub waterway is connected to the main waterway;
9. The on-off valve according to claim 5, wherein two water outlets of the sub waterway are connected to a rim water port and a jet water port. 10. The on-off valve according to claim 1, wherein the sub-valve is manually operable. 11. A sub flow passage provided with a constant flow valve mechanism.
The on-off valve according to 7, 8, 9 or 10.