JP2761258B2 - Toilet flush water supply - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a flush water supply device for a toilet having a water supply path to both a trap section and a bowl section of the toilet.

(Prior art) A cleaning water supply device for independently supplying water to a bowl portion and water to a trap drainage channel is known from Japanese Patent Publication No. 55-30092, and this device has an automatic opening / closing valve for each water channel. Is provided to control the water supply.

(Problems to be Solved by the Invention) However, a water supply channel for the bowl portion is used to supply water to a bowl water supply channel for cleaning the wall surface of the bowl portion and a trap drainage channel, and a trap water supply channel for generating a siphon action. If the water supply channel is provided with an open / close valve mechanism, the size of the water supply device becomes large, and it becomes difficult to mount the cleaning device in the toilet. Further, when the open / close valve is constituted only by the automatic open / close valve, water cannot be supplied at the time of the power failure, and the toilet cannot be used.

(Means for Solving the Problems) In order to solve the above problems, the present invention supplies water to a bowl portion of a toilet bowl to perform pre-washing, while supplying water to a trap drainage channel to generate a siphon action. In the apparatus, the apparatus includes an automatic on-off valve connected to a water supply pipe,
A direction switching valve that is connected to the downstream side of the automatic opening / closing valve and opens the trap drainage channel side when not driven and opens the bowl portion side only when driven, and an automatic opening / closing valve based on a washing start input is preset. And a control means for driving the direction switching valve at a preset timing, and a manual opening / closing valve for manually opening / closing is provided in parallel with the automatic opening / closing valve.

(Operation) By providing the direction switching valve on the downstream side of the on-off valve, switching water supply to a large number of water supply paths can be performed with a small number of valves, and the device can be easily reduced in size and simplified. In addition, since the manual on-off valve is provided in parallel with the automatic on-off valve and the direction switching valve is provided so as to open the trap drainage channel side when it is not driven, even at the time of a power failure, at least the siphon effect can be caused to discharge waste. The toilet can be used.

(Example) Hereinafter, an example of the present invention is described based on an accompanying drawing.

FIG. 1 is a longitudinal sectional view of a toilet provided with a flush water supply device according to the present invention. In FIG. 1, reference numeral 1 denotes a siphon jet toilet, and the toilet 1 includes a bowl portion 3 partitioned by a partition 2 and a trap drainage channel 4. The trap drainage channel 4 connects an inflow port 5 formed in a lower portion of a rear wall of the bowl portion 3 and an outflow port 6 formed in a rear bottom surface of the toilet 1 in a substantially inverted U-shape. The trap drainage channel 4 has a substantially straight pipe-shaped drainage channel 4b downstream of the weir portion 4a, which is a bent portion, and has a throttle 4c at the lower end of the drainage channel 4b. The constricted portion 4c is obtained by reducing the inner diameter of the discharge passage 4b in a direction orthogonal to the pipe wall of the discharge passage 4b. The throttle 4c does not necessarily have to be provided at the position of the outlet 6 which is the lower end of the discharge path 4b.
It may be provided at a substantially middle portion of 4b or at a position downstream of the middle portion.

In the trap drainage channel 4, a large number of projections 4d are provided on the pipe wall downstream of the weir 4a. In the embodiment shown in FIG. 1, three projections 4d are formed by making the inner circumference of the tube wall make a full circumference at a predetermined interval. The projections 4d are arranged at predetermined intervals. However, as shown in FIG. 2, the phase of the position where the projections 4d...
4d, and the flow is changed so as to flow down uniformly over the entire circumference of the pipe wall of the discharge path 4b. As a result, the washing water is supplied to the throttle portion 4c substantially uniformly over the entire circumference, a stable water film state is generated even with a small flow rate, and the siphon action can be efficiently caused.

In the toilet 1 according to the present embodiment, a rim water passage 9 is formed in an annular shape on the rim portion 8 at the upper peripheral edge of the bowl portion 3 so as to protrude inward of the bowl portion 3, and the bottom surface of the rim water passage 9 is formed. Water outlets 10 are formed obliquely with respect to the bowl 3 at appropriate intervals. In addition, the rim water passage 9 has a rim water supply chamber 11 at the rear.
Contact Thus, the rim water passage 9 constitutes a water supply passage to the bowl portion of the present invention.

The jet nozzle 12 is attached to the jet nozzle mounting hole at the bottom of the bowl portion 3 in a watertight state via an adhesive or the like. The jet injection hole 12a of the jet nozzle 12 is connected to the inflow port 5 of the trap drain passage 4. It is directed substantially at the center of the upward inclined pipe line from the upper part to the weir portion 4a. The jet nozzle 12 is formed of metal, synthetic resin, or the like. In the present embodiment, the jet nozzle 12 has a hook shape.

A box 13 is provided at the upper rear of the toilet 1
A cleaning water supply device (hereinafter referred to as a water supply device) 14 is housed in the device 13.

The water supply device 14 includes a control device 15 as water supply control means, and push button switches 16a and 16b for large cleaning and small cleaning, and provides a cleaning start input to the control device 15 at the same time as a selection input of a cleaning water amount. The operation unit 16 which is a washing water amount selection input means, an automatic opening / closing valve 17 for opening and closing the water supply pipe, and a juxtaposition to the automatic opening / closing valve 17, and manually operating between the water supply pipe 23 and a direction switching valve 20 described later. Manual open / close valve 19 that opens and closes, atmospheric release valve
18, 21 and a direction switching valve 20 for switching water supply to the trap section and the bowl section.

As the automatic opening / closing valve 17, for example, a valve that is opened when a predetermined voltage is applied is used. And this automatic on-off valve
Reference numeral 17 denotes a structure capable of withstanding hydrostatic pressure at the time of opening, and capable of preventing a large hydrostatic pressure from being applied to the direction switching valve 20.

The direction switching valve 19 is provided with a handle 19a protruding above the box 13 so that the operation can be easily performed.

A water supply pipe 20a is connected to the inflow port of the direction switching valve 20, and one of the outflow ports of the switching valve 20 is connected to a water supply port of the rim water supply chamber 11 through an atmosphere release valve 18 provided in the rim water supply passage 9a. Connect to 11a. The other outlet of the switching valve 20 is connected to a jet water supply port 12b of the jet nozzle 12 through an air release valve 21 and a jet water pipe 24 made of metal, synthetic resin, synthetic rubber, or the like. The jet water pipe 24 directly connects the water supply control system 14 and the jet nozzle 12, and is arranged along the rear lower surface of the bowl portion 3 so that the length of the jet water pipe 24 is shortened. The other end of the water pipe 24 is connected to the jet water supply port 12b of the jet nozzle 12. Thus, the jet conduit 24 constitutes a water supply channel to the trap drainage channel of the present invention. And when the direction switching valve 20 is not driven, it is open to the jet water pipe side,
The rim water channel side is opened only during the drive.

 FIG. 3 is a block diagram of the control device.

The control device 15 includes an input interface circuit 15a, a microprocessor (MPU) 15b, a memory 15c, a timer 15d, and an output interface circuit 15e. An operation unit 16 is connected to the input interface circuit 15a, and the output interface circuit 15e is connected to the input interface circuit 15a. Is a directional control valve via the water supply control line 20a.
20, the automatic on-off valve 17 is connected.

The operation unit 16 is a stool 16 for starting the cleaning of the toilet 1.
a, a switch for urinal 16b is provided, and the opening and closing of this switch is input to the control device 15 via a start signal line 16a.

The operation unit 16 may be provided with a plurality of operation buttons so that the supply amount of the cleaning water can be selected. Further, a switch or a sensor for detecting the seating is provided, and these signals are input to the control device 15 to enable the operation of the operation unit 16 only in the seating state, or after the seating state is changed to the unseated state. Alternatively, the cleaning may be automatically started after a predetermined time.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. 4 and the time chart of FIG.

In the flowchart of FIG. 4, S1 to S7 indicate each step of the flowchart.

In response to a start signal from the operation unit 16, the control device 15 drives the direction switching valve 20 to open the rim water passage side and open the valve mechanism (S1). Supply. The supplied cleaning water generates a vortex in the bowl portion 3 and performs pre-cleaning of the bowl portion 3. On the other hand, the timer 15d is started immediately after the automatic opening / closing valve 17 is opened, and after a predetermined time elapses, the driving of the direction switching valve 20 is stopped to switch the water supply from the rim to the jet nozzle (S2, S3).

As a result, the washing water is jetted from the jet nozzle 12 into the trap drainage channel 4, and the jetted washing water fills the drainage channel 4, while the air in the drainage channel 4 is swirled through the outlet 6. Since the air is exhausted to a drain pipe (not shown) connected to the outlet, a negative pressure is generated in the drain passage 4 and gradually increases. Due to this negative pressure, the pool water 25
Is sucked into the outflow port 6 side beyond the weir portion 4a of the trap drainage channel 4, and the siphon action is generated in a short time from the jet fountain because the negative pressure further increases.

Then, after opening the jet nozzle side, the microprocessor unit 15b starts the timer 15d again, and after a predetermined time elapses, drives the direction switching valve to switch to the rim side (S4, S5). 15 is
The timer 15d is started immediately. Then, when a predetermined time for water sealing set in advance elapses, the drive of the valve direction switching valve 20 is stopped, the jet nozzle side is opened, and the automatic on-off valve 17 is driven to the closed state (S6, S7).

Thereby, a series of water supply control shown in the time chart of FIG. 5 is completed. According to such a configuration, the direction switching valve normally has the jet nozzle side that produces the siphon action in an open state, and therefore, at the time of a power failure, the manual switching valve
Since the siphon action can be generated only by manually opening 19, this toilet can be used even during a power outage, which is convenient.

The automatic on-off valve and the manual on-off valve may be the same. For example, it is also possible to normally use a flash valve to transmit an open / close signal to the control device.

Further, in this embodiment, based on the output signal of the operation unit 16, for the stool, for the urine, for the rim, the time setting value of the flush water amount for the jet is changed in advance, so that the water supply amount for the stool and the urine is changed. I am trying to change it.

As described above, the present embodiment has described the example in which the water supply to the jet nozzle is controlled as an example of water supply to the trap drainage channel. However, the present invention is not limited to such a jet nozzle, and as shown in FIG. 6, for example. Instead of a simple jet nozzle, a shower 7 may be provided to control the water supply to the shower 7.

In addition, the shower 7 is provided in the trap drainage channel on the downstream side by the weir portion of the trap drainage channel 4, and the inside of the trap drainage channel is set to a negative pressure by spraying water from this shower,
With this negative pressure, flush water is drawn into the bowl part of the toilet bowl in the trap drainage channel, and siphon action is easily caused to enhance the flushing effect.

(Effect of the Invention) As described above, the cleaning water supply device according to the present invention
By providing the direction switching valve on the downstream side of the on-off valve, switching water supply to a large number of water supply paths can be performed with a small number of valves, and the device can be reduced in size and simplified. Therefore, mounting of the cleaning device in the toilet is also facilitated. In addition, since the manual on-off valve is provided in parallel with the automatic on-off valve and the direction switching valve is provided so as to open the trap drainage channel side when it is not driven, at least a siphon action can be caused even during a power failure to discharge waste. The toilet can be used conveniently. Further, since the hydrostatic pressure can be prevented from directly acting on the directional control valve by the automatic open / close valve and the manual open / close valve, the pressure-resistant design of the directional control valve is facilitated, and the size and simplification of the present invention are reduced. The effect can be achieved more.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a toilet provided with a flush water supply device according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a block diagram of the water supply device, and FIG. FIG. 5 is a time chart showing the operation of the water supply device of FIG. 3,
FIG. 6 is a longitudinal sectional view of a toilet showing a toilet according to another embodiment of the present invention. In the drawings, 1 is a toilet bowl, 3 is a bowl portion, 4 is a trap drainage channel, 9 is a rim water channel, 11a is a rim water inlet, 12 is a jet nozzle, 12b is a jet water inlet, and 14 is a flush water supply device. (Water supply device), 15 is a control device as water supply control means, 16
Denotes an operation unit, 17 denotes an automatic opening / closing valve, 19 denotes a manual opening / closing valve, and 20 denotes a direction switching valve.

Continuation of the front page (72) Inventor Shinji Shibata 2-81-1, Honmura, Chigasaki-shi, Kanagawa Prefecture Tochiki Kikai Co., Ltd. Chigasaki Plant (72) Inventor Noboru Niihara 2-2-1, Honmura, Chigasaki-shi, Kanagawa Prefecture East (56) References Japanese Patent Laid-Open No. Sho 50-55146 (JP, A) Japanese Utility Model Sho 63-27580 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E03D 5/10 E03D 3/00 E03D 11/02

Claims (1)

(57) [Claims] 1. A toilet flushing / water supply device for supplying water to a bowl portion of a toilet bowl to perform pre-washing while supplying water to a trap drainage channel to generate a siphon action, the device comprising an automatic water supply device connected to a water supply pipe. An on-off valve, a direction switching valve connected to the downstream side of the automatic on-off valve to open the trap drainage channel side when not driven, and open the bowl portion only when driven, and an automatic on-off valve based on a washing start input And a control means for driving the direction switching valve at a preset timing, and a manual opening / closing valve for manually opening / closing is provided in parallel with the automatic opening / closing valve. A flush water supply system for toilets.