JPS6358981B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a toilet flushing device that discharges flushing water only when a person uses the toilet.

[Background technology]

Conventionally, devices have been provided in which a button or the like on a flushing valve device is manually pressed to flush water into the toilet bowl, thereby flushing the toilet bowl. In many cases, people forget to clean the toilet bowl, and when this happens, filth, sewage, etc. get stuck in the toilet bowl, creating an unsanitary problem. Another problem was that when the toilet bowl is used in a dry state, filth and sewage tend to stick to it. Therefore, as shown in Special Publication No. 54-18057, a detector detects when a person comes in front of the toilet bowl and flushes a small amount of water to wet the toilet bowl, thereby preventing dirt and sewage from sticking to the toilet bowl. However, a system has been proposed that detects when a person has left and flushes a large amount of water to flush the toilet bowl. By the way, in public toilets such as stations, there are cases where people come in immediately after someone leaves and use the toilet continuously. This caused the inconvenience of being unsanitary due to the sewage splashing around. In order to solve this inconvenience, it is possible to forcibly stop the large amount of water spraying when the next person comes during the large amount of water spraying, but if a large number of people come one after another, the water spraying after use may be stopped. There was a problem that the amount of water decreased and the cleaning ability decreased.

[Purpose of the invention]

The present invention has been made in view of the above points, and its purpose is to prevent sewage from splashing during continuous use, and even when a large number of people come continuously. An object of the present invention is to provide a toilet flushing device that can prevent a decline in cleaning ability.

[Disclosure of the invention]

As shown in FIG. 1, the present invention comprises a toilet bowl 1, a valve device 3 such as an electromagnetic valve for flushing water into the toilet bowl 1, and a valve device 3 such as an electromagnetic valve that causes flushing water to flow into the toilet bowl 1, and continues to output an on signal while a person approaches the toilet bowl 1 and is using it. It is composed of a human body detection sensor 2 such as an ultrasonic sensor, and a control device 7 that receives the output of the human body detection sensor 2 and controls the valve device 3. The valve device 3 is composed of a small amount of water discharging means for discharging a small amount of flush water just to wet the toilet bowl 1, and a large amount of water discharging means for discharging a large amount of flush water for flushing the toilet bowl 1. It has a built-in timer means that sets the opening time of the small amount water discharging means and the large amount water discharging means of the valve device 3 based on the output of the human body detection sensor 2, and the small amount water discharging means is opened by the turn-on signal of the human body detection sensor 2, and the small amount The toilet bowl 1 is kept wet at least before the person starts defecating by discharging flush water,
Further, the large amount of water discharging means is opened in response to a turn-off signal from the human body detection sensor 2, and releases a large amount of flushing water into the toilet bowl 1 for a predetermined period of time set by the timer means after it is detected that a person has left. It's becoming like that. Further, the control device 7 includes a first signal priority means that, when a turn-on signal of a new human body detection sensor is generated during large-volume water discharging, gives priority to this turn-on signal and stops the large-volume water discharging; a calculation means for accumulating the remaining time of the timer means when the priority means is activated; and when the accumulated value of the remaining time exceeds a set value, the first signal priority means is further prioritized to discharge a large amount of water for a certain period of time; A second signal priority means is provided, and the first signal priority means stops the large volume water discharge when a person comes during the large volume water discharge. It has the effect of preventing splashing, and the second signal priority means is forced to stop when a large amount of water is stopped continuously and the accumulated value of the remaining time of the timer means exceeds the set value. Since a large amount of water is sprayed at the same time, the cleaning performance is prevented from deteriorating even when many people come continuously. In the configuration example shown in FIG. 1, a reflection type ultrasonic sensor is used as the human body detection sensor 2, but a transmission type ultrasonic sensor may also be used. Alternatively, a cut-off photoelectric switch having a light projector 8 and a light receiver 9 may be used.

〔Example〕

Figures 3 to 5 show an example of a valve device 3 used as a small amount water discharging means and a large amount water discharging means, in which the opening area of the valve is adjusted in two stages, large and small, with one valve device 3. be. That is, the electromagnetic valve 3 connects the stop valve part 15 and the filter part 1.
6 and an electromagnetic valve section 17 are sequentially arranged in a path from an inlet 18 to a toilet connection port 19. The stop valve part 15 has a valve 21 that can freely close the opening 20.
The valve 2 is configured with a water stop valve 22 equipped with a
1 is normally pushed upward by water pressure to open the opening 20, and by tightening the screw of the water stop valve 22, the valve 21 closes the opening 20 and blocks the flow of water through the opening 20. . The filter part 16 includes a filter 23 and a filter removal screw 24.
A filter 23 is used to remove dust from the flowing water. The electromagnetic valve section 17 includes a plunger 26 in the cylinder 25 and a spring 33 that pushes down the plunger 26.
, electromagnetic coils 27a and 27b arranged in upper and lower stages in the direction of movement of the plunger 26, a valve plate 28 that moves up and down as the plunger 26 moves up and down, and a valve plate 28 that is attached to the lower surface of the valve plate 28. The valve 29 includes a valve 29 made of rubber, and a valve seat 30 that blocks water flow when the valve 29 is pressed against the valve 29. Further, the plunger 26 is provided with upper and lower enlarged portions 26a and 26b, and the upper and lower steps at the centers of the first electromagnetic coil 27a and the first enlarged portion 26a are connected to the second electromagnetic coil 27.
b and the second enlarged portion 26b, and when the first electromagnetic coil 27a is excited, the first enlarged portion 26a is attracted by this, and the plunger 26 moves upward by the step between them. The gap between the valve 29 and the valve seat 30 is opened slightly as shown in FIG. 4, forming a small amount water discharge means 3a that allows a small amount of flushing water to flow, and when the second electromagnetic coil 27b is excited, this The second enlarged portion 26b is attracted and the plunger 26 moves upward by the difference in level between them, opening the space between the valve 29 and the valve seat 30 wide as shown in Fig. 5, allowing a large amount of flushing water to flow. This forms a water discharging means 3b. Thus, by controlling both the electromagnetic coils 27a and 27b with the control device 7, the above-described operation can be realized. Note that FIG. 3 shows both electromagnetic coils 27a, 2.
7b indicates a state in which the plunger 26 is not energized, and the plunger 26 is pushed down by the spring 33 to completely shut off. Reference numeral 31 in the figure is a manual knob, which is connected to a permanent magnet 32 at its lower part. When the manual knob 31 is pulled upward, the permanent magnet 32 is also pulled upward, and thereby the plunger 26 The valve also moves upward, so that even in the event of a power outage, the valve can be opened manually to allow flushing water to flow.

Figure 6 shows a specific circuit diagram of the control device 7, where _S1 is the output contact of the human body detection sensor 2, which turns on when a person stands in front of the toilet bowl 1, and turns off when the person leaves the toilet bowl 1. . The timer means for setting the opening time of the small amount water discharging means 3a and the large amount water discharging means 3b includes an inverter circuit _I1 and a monostable multivibrator _M1 that set the large amount water discharging time after the person has left, and a timer means for setting the opening time of the small amount water discharging means 3a and the large amount water discharging means 3b. It is made up of an off-day timer DT ₁ that sets the time for a small amount of water to be sprayed. In addition, in the example, the output contact
A monostable multivibrator _M2 is provided which is triggered by the turn-on signal _{of S1, and a large amount of water is discharged at the output of an OR circuit O1 which takes the logical sum of the outputs V M1 and V M2 of} the monostable multivibrators M1 and M2 _. The electromagnetic coil 27b of the means 3b is excited to spray a large amount of water, and the large volume water spraying means 3b is opened for a short time immediately after the output contact S ₁ of the human body detection sensor 2 is turned on, and after the output contact S ₁ is turned off. It stays open for a relatively long time and releases a large amount of water. In the figure, D ₁ and D ₂ are surge removal diodes,
Q ₁ and Q ₂ are drive transistors. _A1 is an AND circuit forming the first signal priority means, and turns on the new human body detection sensor 2 during the time limit of the monostable multivibrator _M1 , which is a timer means for setting the opening time of the large-volume water spraying means 3b. When a signal is generated, a signal priority means is formed which gives priority to this turn-on signal and blocks the large volume water spraying means 3b, and when a person continues to come, the large amount of water spraying is promptly stopped to prevent splashing of water. It's becoming like that. On the other hand, the AND circuit _A2 detects the remaining time of the timer means when the first signal priority means operates (the time limit invalidated by the first signal priority means), and the remaining time of the timer means is detected. Remaining capacity integration circuit TI, which is a calculation means for integrating time
This remaining time is accumulated by the comparator circuit CP, and when the accumulated value exceeds the set value set by the reference value setting circuit ST, a cleaning required signal indicating insufficient cleaning is output from the comparison circuit CP, and the second signal priority means The monostable multivibrator M3 forming the toilet bowl ₁ is triggered, and the output of the monostable multivibrator _M3 forcibly opens the large volume water discharging means 3b for a predetermined period of time to forcibly clean the toilet bowl 1, thereby resolving the lack of cleaning. It's summery. In addition, the remaining amount integration circuit TI has _two AND circuit A outputs.
_Each pulse width T ₂₁ , T ₂₂ , T ₂₃ . It is conceivable that the integration is performed using an integrating circuit that converts the

Hereinafter, the operation of the remaining amount integrating circuit TI using an integrating circuit will be specifically explained. now,
When a person comes alone, that is, after the period of large-scale water discharging after use, the AND circuit A ₁ output V _A1 becomes the monostable multivibrator M ₁ output, and the time chart in Figures 7 and 8 The behavior is as shown in . That is, when a person comes in front of the toilet bowl 1, the output contact signal V _S1 becomes H level, and the monostable multivibrator is activated for a short time T ₀ from time t ₁ to t ₁ ' when the output contact signal V _S1 rises. Output of _M2
When V _M2 becomes H level, the electromagnetic coil 27b of the large-volume water spraying means 3b is energized and a large amount of water is sprayed before use, and when the person leaves, the output contact signal is
A relatively long period of time from t ₁ to t ₂ when V _S1 falls
Output of monostable multivibrator M ₁ between T ₂ V _M1
becomes H level and a large amount of water is sprayed after use. On the other hand, the output V _DT1 of the off-delay timer DT ₁ becomes H level immediately after the output contact S ₁ is turned on, and at t ₃ after a certain period of time _TD from the time t ₂ when the large amount of water discharging is stopped.
At this point, the level becomes L level, and the electromagnetic coil 27a of the small amount water spraying means 3a is energized and a small amount of water is sprayed during time _T1 . The reason why the small amount of water is stopped after a certain period of time T _D after the large amount of water is stopped is to prevent the water hammer phenomenon, and also to make sure that the large amount of water is only sprayed for a short period of time before use. The reason for this is that before using the toilet
This is to keep the whole area sufficiently wet. In the diagram
V _I1 is the output of inverter I ₁ , and V _O1 is the output of OR circuit O ₁ .

On the other hand, if a person comes continuously, that is, if the output contact S ₁ of the human body detection sensor 2 is turned on during the time limit T ₂ of the monostable multivibrator M ₁ , the time chart in FIG. At this point, the output of the AND circuit _A1 immediately goes to the "L" level, and the large amount of flushing water after use in the previous cycle is stopped, and a large amount of water is sprayed for a short time _T0 before use in the next cycle. Therefore,
A large amount of flushing water is sprayed over a long period of time (T ₂ hours) to prevent splashing when used by people who come in succession.

By the way, the period of large-volume water spray when people come continuously is the "H" level period of the OR circuit _O1 output V _O1 , and in the case shown in the time chart of Fig. 9, T ₀ ,
T ₂ ′, T ₂ ″, T ₂ , and compared to when a person comes alone, the time for discharging a large amount of water becomes shorter, resulting in insufficient cleaning. This is the sum of T ₂₁ ′, T ₂₂ ′, T ₂₃ ′...
Here, the remaining times T ₂₁ ′, T ₂₂ ′, and T ₂₃ ′ are the time T ₂₁ , T ₂₁ , and
It is the value obtained by subtracting T ₂₂ , T ₂₃ ..., and the AND circuit A ₂
The pulse width signal V _A2 is obtained by taking the AND of the monostable multivibrator M ₁ output V _M1 and the output contact signal V _S1 . This pulse width signal
V _A2 is converted into a voltage level signal Va and integrated by a remaining amount integration circuit TI consisting of an integrating circuit. The integrated voltage level signal Va is a preset value
When Vs is exceeded, the comparator circuit CP outputs a cleaning signal Vb, which triggers the monostable multivibrator _M3 , outputs a forced cleaning signal Vc, and forces a large amount of water to be discharged for _T3 hours to accumulate water. The lack of cleaning is now being solved all at once.

At this time, monostable multivibrator _M3 output
The integrated value of the timer remaining amount integrating circuit TI is cleared at Vc.

〔Effect of the invention〕

As described above, the present invention includes a human body detection sensor that detects a person using the toilet bowl, and a turn-on signal of the human body detection sensor to open the toilet bowl to discharge a small amount of water, and a turn-off signal to open the toilet bowl to discharge a large amount of water. a valve device, a timer means for setting the water discharge time of the valve device, and a first signal priority for stopping the large volume water discharge by giving priority to this turn-on signal when a new turn-on signal of a human body detection sensor occurs during the large volume water discharge. means for integrating the remaining time of the timer means when the first signal priority means is activated; A second signal priority means for discharging a large amount of water for a certain period of time with priority;
The second signal priority means stops the large volume of water if someone comes during the large volume of water, which has the effect of preventing sewage from splashing during continuous use. By using the priority means, when large quantities of water are continuously stopped and the accumulated value of the remaining time of the timer means exceeds the set value, large quantities of water are forcibly discharged. This has the effect of preventing the cleaning ability from decreasing even if someone comes over.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the schematic structure of the present invention;
The figure is a front view showing the schematic configuration of the same as above, FIGS. 3 to 5 are views showing the main part structure and operation of the same as above, and FIG.
The figure is a circuit diagram of the main part of the same as above, and FIGS. 7 to 9 are operation explanatory diagrams of the same as above. 1 is a toilet bowl, 2 is a human body detection sensor, and 3 is a valve device.

Claims (1)

[Claims] 1. A human body detection sensor that detects a person using the toilet; a valve device that opens in response to a turn-on signal from the human body detection sensor to discharge a small amount of water, and opens in response to a turn-off signal to discharge a large amount of water; and the valve device. a timer means for setting the water discharging time; a first signal priority means for stopping the mass water discharging by giving priority to the new turn-on signal of the human body detection sensor when a new turn-on signal of the human body detection sensor occurs during the mass water discharging; a calculation means for accumulating the remaining time of the timer means when the signal priority means is activated; and a large amount of water spraying for a certain period of time with further priority over the first signal priority means when the accumulated value of the remaining time exceeds a set value. A toilet flushing device comprising a second signal priority means.