JPH03253630A - Flushing type stool - Google Patents

Abstract

PURPOSE:To permit controlling flow rates stably by a method in which washing water coming from the outside pilot flow path of an outer pilot-type diaphragm valve is directed through a through hole formed in the blow wall above the water-sealing face into the bowl part. CONSTITUTION:Washing water coming from the outside pilot flow path of an outer pilot-type diaphragm valve 12a is directed through a through hole 30 formed in the wall of a bowl part 8 above the water-sealing face into the bowl part 8. The water discharge side of the outer pilot is opened to the air in such a way as to avoid the effect of the secondary pressure in the water discharge side pipeline of the diaphragm valve 12a, permitting stable control on flow rates to be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a flush toilet equipped with a flush water supply device using an external pilot type diaphragm valve.

(Prior Art) When using an external pilot type diaphragm valve, it is necessary to discharge the wash water discharged from the pilot flow path to the outside when the valve is opened. In a conventional cleaning water supply device, cleaning water discharged from a pilot flow path is discharged to a downstream pipe connected to a water outlet of a diaphragm valve.

(Problem to be Solved by the Invention) However, in the case of a structure in which the cleaning water from the pilot flow path is discharged to the downstream pipe line of the diaphragm valve, the flow rate of the pilot flow passage is affected by the water pressure in the downstream pipe line. For this reason, the opening degree of the diaphragm valve may not reach a predetermined value, and the desired water discharge flow rate may not be obtained. This tendency is more pronounced than with diaphragm valves that simply open and close.
This is more noticeable in the case of a diaphragm-type flow rate control valve that controls the flow rate by varying the opening degree of the diaphragm valve by controlling the flow rate of the pilot flow path.

This invention was made to solve these problems, and its purpose is to open the discharge side of the pilot flow path of the external pilot type diaphragm valve to the atmosphere, and to ensure stable valve opening by draining water into the bowl of the toilet bowl. To provide a flush toilet that can be controlled.

(Means for solving the problem) In order to solve the problem, a water-washing type according to claim 1 [1 is:
Claim 2 characterized in that the washing water flowing out from the external pilot flow path of the external pilot type diaphragm valve is guided into the bowl part through a communication hole bored in the wall surface of the bowl part above the water sealing surface. The flush toilet has a drain valve formed at the rear of the bowl of the toilet body, and the interior of the drain valve and the bowl communicate with each other through a communication hole drilled above the water-sealing surface, and there is also a drain valve connected to the bowl from the external pilot flow path. It is characterized by being equipped with a water conduit that guides discharged wash water to a drain valve.

(Function) Washing water flowing out from the external pilot flow path of the external pilot type diaphragm valve is discharged directly to the bowl through a communication hole drilled in the wall of the bowl, or to the bowl through the drain valve. Ru. Since the communication hole is provided above the water sealing surface, the water discharge side of the external pilot flow path is open to the atmosphere, and is not affected by the secondary pressure in the water discharge side pipe of the diaphragm valve, so it is stable. Flow rate control becomes possible.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

FIG. 1 is a vertical sectional view of a flush toilet according to the present invention, and FIG.
The figure is a plan view of the toilet with the cover, toilet lid and toilet seat removed, and Figure N3 is a sectional view taken along the line III-111 in Figure 1.

The flush toilet 1 includes a toilet main body 2 made of ceramic, a toilet seat 3 and a toilet M4 made of synthetic resin, and a cover 5 made of synthetic resin.
and a cleaning water supply device 6 inside.

The toilet bowl main body 2 has a bowl part 8 and a trap drain channel 9 separated by a partition wall 7, and an opening 10 is formed above the trap drain channel 9, that is, on the rear upper surface of the toilet bowl main body 2.

The trap drainage channel 9 includes an inlet 9a opened at the bottom of the bowl part 8 and an outlet 9b opened at the rear bottom of the toilet main body 2.
It is connected by bending in a roughly inverted U-shape. Then, the cleaning water supply device 6 is attached to the toilet main body 2 through the base plate 11 above and to the side of the bent portion 9C of the trap drainage channel 9, and the cleaning water supply device 6 is attached to the opening 10 of the toilet main body 2 and to the side.
is covered with cover 5. This cover 5 is formed so that its upper surface is substantially flush with the upper surface of the stool M4.

The cleaning water supply device 6 includes a valve unit 12 and a control circuit section 1.
It consists of 3. The valve unit 12 integrates various valve mechanisms for controlling water supply, an atmosphere release valve, etc., and includes a connection part with a water supply pipe and a fitting connection part with each water conduit pipe 17.21. The valve unit 12 of this embodiment includes an external pilot type diaphragm valve 12a with a water stop function and a flow rate adjustment function, two atmosphere release valves 12b,
12c, two-way switching valve 12d1, and pressure sensor 1
2e are integrated into a unit. The valve unit 12 also includes a water supply connection pipe 12f, a fitting connection portion 12g with the rim water conduit 17, and a fitting connection portion 12h with the jet water conduit 21. The water supply connection pipe 12f is formed such that its tip protrudes outward from the rear of the toilet bowl 1, and is fixed by a water supply connection pipe support portion 11a raised from the base plate 11.

A rim passageway 1 is provided in the rim part 14 at the upper edge of the bowl part 8.
5 is formed in an annular shape so as to protrude inward of the bowl portion 8, and rim water injection holes 16 are opened diagonally to the bowl portion 8 at appropriate intervals on the bottom surface of the rim passageway 15. . The rim water passage 15 is connected to the rim fitting connection portion 12g of the valve unit 12 via the rim water conduit 17.

In this embodiment, the fitting connection portions 12g and 12h are provided on the lower side of the valve unit 12 so that the valve unit 12 can be mounted from above. For this reason, the rim water guide pipe 17 is bent into a substantially U-shape so that the inflow side end of the rim water guide pipe 17 is oriented substantially vertically.

A jet nozzle 18 is attached to the bottom of the bowl part 8 with its injection hole 18a facing the base oil fold part 9C of the trap drainage channel 9. This jet nozzle 18 is inserted from the inner side of the bowl part 8 and is tightened and fixed with a fixing nut 19 from the bottom side of the bowl part 8. A packing 20 is provided between the jet nozzle 19 and the mounting hole. jet nozzle 1
8, one end of the jet water conduit 21 is connected via a cap nut 22, and the other end is connected to the jet fitting connection portion 12h of the valve unit 12.

As shown in FIG. 3, the base plate 11 is formed with a water pipe fixing portion 11b that projects downward in a substantially U-shape. Then, as shown in FIGS. 4 and 5, the tips of the rim water pipe 17 and the jet water pipe 21 are inserted from below into the water pipe mounting hole 11c provided in the water supply pipe fixing part 11b, and A molded snap ring 23 is used to secure each water conduit 17.21. Each water pipe 17.21 has two upper and lower
Expanded diameter step portions 24a and 24b are formed at these locations, and a rattling prevention ring 25 is provided between them. Furthermore, a seal ring 26 is attached to the tip of each water conduit 17.21.

As shown in the exploded perspective view of FIG. 6, a rim water pipe 17 and a jet water pipe 2 are attached to the base plate 11.
1 in the above-described manner, attach the valve unit 12 from above to the rim and jet fitting connections 12g, 12.
Attach and fix so that h fits into the rim and jet water conduit 17.21.

Note that the base plate 11 is formed with mounting holes lid... having a relatively larger hole diameter than the diameter of a fastening member such as a bolt. As shown in FIG. 3, the base plate 11 is fixed to the toilet main body 2 using a fastening member 28 such as a bolt via a washer 27 having a relatively large outer diameter. Although the toilet bowl main body 2 is made of ceramic and has low dimensional accuracy, by adopting such a structure, the mounting position of the base plate 11 can be adjusted to a predetermined position.

Next, when water is supplied, the external pilot type diaphragm valve 12a
The drainage structure for cleaning water discharged from the pilot flow path will be explained.

! As shown in FIGS. 1 and 2, a drainage tank 29 is formed above the partition wall 7 at the rear of the bowl part 8, and the lower part of the drainage tank 29 and the side of the bowl part 3 are connected through a communication path of 3 degrees. The water from the pilot flow path is discharged to the drainage tank 29 via a water guide vibrator 31. Similarly, the atmosphere release valve 12b
, 12c also receives wet water from the other water-conducting vibrator 32.
It is configured to lead to the drainage tank 29 via the drain tank 29.

FIG. 7 is a block diagram of the cleaning water supply device 6.

The flow rate of the supplied cleaning water from the water supply connecting pipe 12f is adjusted by an external pilot type diaphragm valve 12a equipped with a water stop function and a flow rate adjustment function, a flow path is specified by a two-way switching valve 12d, and a flow path is specified by an atmosphere release valve 12b. , 12c, through the rim water supply pipe 17 or jet water supply pipe 21, and is supplied from the rim water injection hole 16 or jet nozzle 18 to the bowl portion 8 or trap drainage channel 9. A pressure sensor 12e is provided upstream of the two-way switching valve 12d.

The control circuit section 13 is configured using, for example, a microcomputer, and when human power to start washing is applied, it drives the flow rate adjustment valve 12a and the two-way switching valve 12d in a preset order to supply washing water. . In addition, the control circuit section 13
The opening of the external pilot type diaphragm valve 12a is controlled based on the water supply pressure signal from the pressure sensor f2e so that a predetermined flow rate can be obtained regardless of the water supply pressure. Although not shown in FIG. 2, the control circuit section 13 and the valve unit 12 are connected using a connector or the like. Further, the control circuit section 13 has a waterproof structure in which the entire structure is sealed with silicone resin or the like.

FIG. 8 is a time chart showing an example of the washing water supply order.

In this embodiment, after the bowl part is pre-cleaned, water is supplied to the jet nozzle 18 to generate a siphon action in the trap drainage channel 9, thereby draining the dirty water and filth from the bowl part 8. Furthermore, even after the siphon action has ended, the water supply to the jet nozzle 18 is continued for a while.
The filth and floating filth at the bottom of the trap are pushed into the trap drainage channel 9 (blow effect), and then water is supplied for water sealing.

FIG. 9 is a block diagram showing another embodiment of the cleaning water supply device.

The cleaning water supply device 6 shown in FIG. 9 has two atmosphere release valves 12b and 12c arranged vertically at a predetermined distance between an external pilot type diaphragm valve 12a and a two-way switching valve 12d. There is. With this configuration, when the water supply is stopped, water is drained by the two atmospheric release valves 12b and 12c, and a predetermined air gap is ensured.

Therefore, even if the water supply pipe is in a negative pressure state when the flow rate control valve 12a is opened, it is possible to prevent sewage and the like from flowing back into the water supply pipe from the toilet main body 2 side. In addition, in FIG. 9, 12i is the water outlet of the pilot flow path;
j, 12 are the atmosphere communication ports of the respective atmosphere release valves 12b, 12c.

Next, another embodiment of the present invention will be described with reference to FIGS. 10 to 13.

FIG. 10 is a vertical cross-sectional view of a flush toilet according to another embodiment;
tS11 is a plan view of the toilet with the cover, valve lid and toilet seat removed, Figure 12 is a cross-sectional view taken along the double-■ line in Figure 10, and Figure 13 shows the connection structure between the valve unit and each water pipe. FIG.

The same parts as in the first embodiment are denoted by the same reference numerals, and only the differences will be explained below.

This embodiment uses an externally piloted diaphragm valve 12a.
The cleaning water discharged from the external pilot channel is guided to the drainage tank 29 by using a concave portion formed in the base plate 11 without using the water guide vibrator 31 as a guide channel 11e (see FIG. 13). For this reason, the water outlet 12i of the pilot flow path of the external pilot type diaphragm valve 12a is formed facing the water conduit lie, as shown in FIG.

Furthermore, the atmosphere communication port 12 of each atmosphere release valve 12b, 12c
j and 12k are also provided on the side facing the water conduit lie, and these air communication ports 12j.

The structure is such that the water discharged from 12k is guided to a drainage tank 29.

(Effects of the Invention) As explained above, the flush toilet according to the present invention has a communication hole drilled in the wall of the bowl above the water sealing surface to allow flushing water flowing out from the external pilot flow path of the external pilot type diaphragm valve Since the water is drained into the bowl through the diaphragm valve, the water discharge side of the external pilot flow path is open to the atmosphere, so it is not affected by the secondary pressure in the water discharge side pipe of the diaphragm valve, resulting in a stable flow. Flow rate control becomes possible.

In addition, since the configuration does not allow the cleaning water flowing out from the pilot flow path to flow directly into the sealed water in the bowl, there is no need to provide an atmosphere release valve or the like in this flow path to prevent backflow, and the cleaning water supply device can be made more compact. Contribute to

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of the flush toilet according to the present invention, Fig. 2 is a plan view of the toilet with the cover, toilet lid and toilet seat removed, and Fig. 343 is a sectional view taken along the line III-111 of Fig.'s1. , FIG. 4 is a perspective view showing the fixing structure of the rim and the jet water supply pipe, FIG. 5 is a sectional view of the fixed state, and FIG. 6 is an exploded perspective view showing the connection structure between the rim of the valve unit and the jet water supply pipe. , FIG. 7 is a block configuration diagram of the cleaning water supply device, FIG. 8 is a time chart showing an example of the cleaning water supply order, FIG. 9 is a block configuration diagram showing other embodiments of the cleaning water supply device, and FIGS. Fig. 13 shows another embodiment of the present invention, Fig. 51o is a vertical sectional view of the flush toilet, Fig. 11 is a plan view, Fig. 12 is a sectional view taken along the ■-cut edge line in Fig. 10, and Fig. 13 is a longitudinal sectional view of the flush toilet. It is an exploded perspective view showing the connection structure of a valve unit and each water conduit. DESCRIPTION OF SYMBOLS 1...Flush type toilet bowl, 2...Toilet bowl main body, 6...Washing water supply device, 8...Bowl part, 9...Trap drain channel, 11...Base plate, lie...Hail channel ,1
2... Pulp unit, 12a... External pilot type diaphragm valve, 12b, 12c... Atmospheric release valve,
12d... Two-way switching valve, 12e... Pressure sensor,
12f... Water supply connection pipe, 12g, 12h... Fitting connection part, 12i... Water outlet of pilot flow path, 12j. 12k...Air vent, 13...Control circuit section, 17
゜21... Water guide pipe, 29... Drain valve, 30... Communication hole provided in the wall of the bowl portion, 31.32... Water guide pipe. Patent applicant Totokiki Co., Ltd. Agent Patent attorney 2 1) Yong - Immediate inquiry Patent attorney
Kuni Ohashi Patent Attorney Yu Koyama Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) In a flush toilet equipped with an external pilot type diaphragm valve, a communication hole is provided in the bowl wall above the water sealing surface for flushing water flowing out from the external pilot channel of the external pilot type diaphragm valve when the valve is opened. A flush toilet characterized by being configured to lead the water into the bowl part through a hole. (2) In a flush toilet equipped with an external pilot type diaphragm valve, a drainage tank having a communication hole passing through the bowl part above the water sealing surface is formed at the rear of the bowl part of the toilet body, and the external pilot type diaphragm valve A flush toilet characterized by comprising a water conduit that guides flush water discharged from an external pilot flow path of the valve to the drainage amount.