JP2662862B2 - Valve time switch - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time switch for a valve for stopping flushing water for a certain period of time in an unspecified number of flush toilets. 2. Description of the Related Art Conventionally, it has been practiced to convert a rotary motion of a motor into a linear motion to operate a valve for water supply, and also to flush flush water to a flush toilet for a certain time in combination with a timer. Have been. That is, when the timer is started by the operation switch, a closed circuit that drives the motor is formed,
When the valve moves by a predetermined amount, the detection switch is switched, the current to the motor is cut off, and the valve is opened, and after a certain time,
The timer runs out and the motor is started in the opposite direction, closing the valve. The problem is not so serious when the device is used by a small number of people, but when the device is used by an unspecified number of people, the following accidents are induced. That is, if the turned on operation switch does not return, the timer continues to be started, the valve remains open, water continues to flow, and depending on the piping, the toilet may overflow. Also, apart from this, even if you notice that the timer cannot be used due to a power failure or the like after excretion is over, it is not very sanitary to leave the toilet dirty without leaving the toilet flushed. Of course, the above does not happen very often, but on the other hand, it is not very suitable as a switch for opening and closing a valve. Means for Solving the Problems In order to solve the above-mentioned problems, the present invention reverses a predetermined time when an external operation switch is turned on, or when power is turned on and when an external operation switch is turned on. The operation unit inverts the output of the flip-flop, thereby inverting the output of the timer for a fixed time and energizing the relay to drive the motor to open the valve,
After a predetermined time, the relay is deenergized and the motor is driven in the reverse direction to close the valve. [Action] By doing this, even if the operation switch does not return, the valve is opened only once and then closed after a certain period of time, preventing water from flowing forever and overflowing the toilet. To prevent. Also, even if the toilet is left dirty after a power failure, once the electricity is restored, the valve is once opened, and after a certain period of time with flowing water, the valve is closed, and the dirty toilet is washed. Hereinafter, the present invention will be described with reference to the embodiments shown in the drawings. In FIG. 1, P is an external operation switch, and the input A of the operation unit becomes 0 only while being turned on. This input A is 2
One input B of a flip-flop F composed of two NANDs via an operation unit including two inverters and a differentiation circuit
Has been reached. From the output Q of the flip-flop F, a relay T driven by a transistor is passed through an inverter, and a timer T composed of a diode, a resistor, a capacitor, and an inverter is passed through another inverter.
And its output reaches another input C of the flip-flop F. Vs is a DC constant voltage. FIG. 2 shows an embodiment of a motor circuit driven by the time switch of FIG. The DC motor M reaches a drive power source Vd sufficient to drive the DC motor M via a detection limit switch L that switches in conjunction with each other and a contact Ry that switches by a relay R in FIG. The rotational motion of the DC motor M is appropriately converted to linear motion to move the valve V. When the valve V moves by a predetermined amount, the detection limit switch L switches and the valve V stops. At the position of the relay contact Ry and the limit switch L shown in FIG. 2, the valve V is closed. The relay R in FIG. 1 is deenergized, and the output Q of the flip-flop F is 1. When the operation switch P of the operation unit is pressed from this state, the following operation is performed. That is, the input A of the operation unit is 1 to 0
One input B of the flip-flop F is inverted from 1 to 0 via a differentiating circuit which is the output of the operating unit, and even if the operating switch P is kept depressed, it remains at 1 for a predetermined time determined by the time constant of the differentiating circuit Return to. In the meantime, since the other input C of the flip-flop F is 1, the output Q is inverted from 1 to 0, and even if the input B returns to 1, the inverted Q is maintained at 0. As a result, the relay R is energized via the inverter and the transistor, the contact Ry is switched from the position shown in FIG. 2 to the other end, and a current flows from the drive power supply Vd to the DC motor M via the limit switch L so that the valve Is driven in the opening direction. When the limit switch L is moved by a predetermined amount, the limit switch L is switched from the position shown in FIG. 2 to the other end, the drive current to the DC motor M is cut off and stopped, the valve V is opened, and the flush water is discharged to the toilet. Flows. On the other hand, when the output Q of the flip-flop F is inverted from 1 to 0, on the timer T side, the capacitor is slowly charged via the inverter and the resistor. The output C is inverted from 1 to 0. Timer T
Is the other input C of the flip-flop F as it is, so that when the input C becomes 0, the output Q of the flip-flop F returns from 0, which was inverted, to 1, and is charged by the timer T via the inverter. The discharged capacitor is rapidly discharged through the diode, the other input C of the flip-flop F is returned to 1 through the inverter, and one input B is also 1. Therefore, the output Q of the flip-flop F becomes 1
It is held in the state returned to. On the other hand, since the output Q of the flip-flop F becomes 1, the relay R is deenergized via the inverter and the transistor, and the contact Ry returns to the position shown in FIG. As a result, a current flows through the DC motor M in the opposite direction from the drive power supply Vd via the limit switch L at a position that has been changed from the position shown in FIG.
The valve V is driven in the closing direction. When the limit switch L is moved by a predetermined amount, the limit switch L returns to the position shown in FIG. 2 and the drive current to the DC motor M is cut off and stopped, the valve V is closed, and the washing water flowing is stopped. As described above, when the operation switch P of the operation unit is pressed, one input B of the flip-flop F is inverted to 0 for a predetermined time and returns to 1 via the differentiating circuit.
Is inverted from 1 to 0, and the relay R is energized to open the valve V. Meanwhile, the capacitor of the timer T is charged, and when a certain time elapses, the flip-flop F
The other input C becomes 0 and the inverted output Q returns from 0 to 1, whereby the relay R is deenergized and the valve V is driven in the closing direction, while the capacitor of the timer T is discharged. The other input C of the flip-flop F is held at 1. Since the output Q of the flip-flop F is first inverted through the differentiating circuit, the time constant of the differentiating circuit is set to be sufficiently longer than the output Q of the flip-flop F is inverted. When the power is turned on, a capacitor is inserted in parallel with the operation switch P of the operation unit at the input A of the operation unit.
Since it is delayed compared to the DC constant voltage Vs together with the resistance,
One input B of the flip-flop F becomes 0 through the differentiating circuit and then returns to 1. The other input C of the flip-flop F is 1 through the inverter because the capacitor of the timer T is not charged, so that the flip-flop F
Output Q becomes zero. That is, the state is the same as when the operation switch P of the operation unit is turned on. As described above, the relay R is energized to open the valve V, and after a certain time,
The timer T changes the other input C of the flip-flop F to 0 to return the output Q to 1, the relay R is deenergized to close the valve V, and the capacitor of the timer T discharges to release the flip-flop F. Return other input C to 1;
The output Q is held at the restored 1. In this way, even when the power is turned on, the flushing water is once flown to be in the closed state, and separately, even if the operation switch P is continuously turned on, the closed state is maintained for a certain period of time. The operation section between P and flip-flop F is not limited to the differentiating circuit shown in FIG. In the operation unit of FIG. 3, the input A, which becomes 0 only while the operation switch P is turned on, directly reaches one input of the OR, and the other input of the OR, which reaches via the inverter and the resistor, is connected to a capacitor. Grounded. Parts corresponding to those in FIG. 1 are denoted by the same reference numerals. The output of the OR of the operation unit is one input B of the flip-flop F, and the subsequent steps are the same as those in FIG. In FIG. 3, if the operation switch P is left without being turned on, the input A of the operation unit becomes 1 and the flip-flop F
Is input 1, the capacitor is discharged via the inverter and the resistor. When the operation switch P is turned on from this state, the input A becomes 0 and the capacitor B is discharged, so that the input B of the flip-flop F by the OR gate is inverted from 1 to 0. If the operation switch P is kept turned on, the capacitor is charged via the inverter, and after a predetermined time, the flip-flop F
Input B returns to 1 from 0, which has been inverted. In this manner, the output Q of the flip-flop is held in a state of being inverted to 0, following the above-described series of processes, the relay R is energized, the valve V is opened, and the washing water is allowed to flow for a predetermined time. After returning to the closed state later, the output Q of the flip-flop F is returned to 1 and held. In FIG. 3, when the power is turned on, the resistance is delayed from the DC constant voltage Vs by a resistor and a capacitor connected to both inputs of the OR gate of the operation unit, and one input B of the flip-flop F becomes zero. Return to 1. The other input C is when the timer capacitor is not charged,
1 through the inverter, so the output Q of the flip-flop becomes 0. With this, following the above-described series of processes, the relay R is energized to open the valve V to flow the washing water, and returns to the closed state after a predetermined time,
The output Q of the flip-flop F is returned to 1 and held. Since the output Q of the flip-flop F is inverted with its input, that is, the output B of the OR gate of the operation unit being set to 0, the time constant from the output of the inverter to the input of the OR gate is equal to the output of the flip-flop F. It should be long enough for Q to be inverted. 1 and 3, that is, one input B of the flip-flop F, when the operation switch P is turned on, it changes from 0 to 1 after a predetermined time regardless of a change in the output Q.
In FIG. 4, the input B returns from 0 to 1 a predetermined time after the operation switch P is turned on and the output Q of the flip-flop F is inverted.
In FIG. 4, parts corresponding to those in FIGS. 3 and 1 are denoted by the same reference numerals. In FIG. 3, the input of the inverter to the input of the OR gate of the operation unit was the input A of the operation unit, but in FIG. 4, it is connected to the output Q of the flip-flop F. When the output Q of the flip-flop F is 1, the relay R via the inverter is deenergized, the input of the OR gate via another inverter is 0, and the capacitor is not charged. When the operation switch P is turned on from this state, the input A becomes 0 and the capacitor is discharged, so that the input B of the flip-flop F by the OR gate is inverted from 1 to 0, and the output Q is inverted from 1 to 0.
As a result, the relay R is energized through the inverter. On the other hand, if the operation switch P is kept turned on, the capacitor at the input of the OR gate is charged through another inverter, and after a predetermined time, Then, the input B of the flip-flop F by the OR gate is returned from 0 to 1 to 1 and the output Q is held to be inverted to 0. Thereafter, it operates as described above, and after a predetermined time, the relay R is deenergized to return the valve V to the closed state, and the output Q of the flip-flop F is returned to 1 and held. In addition, when the power is turned on in FIG. 4, both inputs of the OR gate of the operation unit are delayed from the DC constant voltage Vs by the resistor and the capacitor. Then, it returns to 1.
Since the other input C of the flip-flop F is 1, its output Q becomes 0. As described above, the valve V is closed by flowing washing water for a certain period of time, and the output Q of the flip-flop F is Return and hold. [Effects of the Invention] As described above, the present invention provides an operation unit that reverses for a predetermined time when an external operation switch is turned on, or when a power supply is turned on and an external operation switch is turned on. Inverting the output of a flip-flop, thereby operating a timer while opening a valve, and resetting the output of the flip-flop after a certain period of time, thereby releasing the timer while closing the valve. As mentioned earlier, even if the operation switch is kept pressed, the valve is opened only once and then closed after a certain period of time, causing water to flow forever and overflowing the toilet. Even if the toilet is dirty and left behind due to a power outage, the valve will be opened once the electricity is restored, and will be closed after a certain period of running water. Cleaning the dirty toilet bowl.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing one embodiment of the present invention. FIG. 2 is a motor circuit diagram of a valve in a closed state controlled by an embodiment of the present invention. FIG. 3 is a circuit diagram showing another embodiment of the present invention. FIG. 4 is a circuit diagram showing another embodiment of the present invention. [Description of Signs] P: Operation switch F: Flip-flop T: Timer R: Relay L: Detection limit switch M: DC motor V: Valve Vs: DC constant voltage Vd: Driving power supply

Claims (1)

(57) [Claims] When the operation switch is turned on from the outside, or when the power is turned on and when the operation switch is turned on from the outside, the output is inverted for a predetermined period of time, and thereafter the output is restored. A flip-flop that holds the inverted output even if the input is restored after a predetermined time has elapsed,
A timer for inverting the output of the flip-flop by inverting the output after a predetermined time from the inversion of the output of the flip-flop, inverting the other input of the flip-flop to restore the inverted output of the flip-flop, and restoring the inverted output, A time switch for a valve consisting of a relay that energizes and deactivates the motor drive circuit by inverting and returning the output of the flip-flop.