JPH06558B2 - Refueling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents an accident in which a fueling nozzle is stored in a nozzle housing portion and the next fueling is carried out without noticing that the fueling nozzle remains open. The present invention relates to an oil supply device that can be reliably prevented.

[0002]

2. Description of the Related Art Heretofore, there has been known a preset type oil supply device capable of presetting a desired amount of oil supply or an amount of money to quantitatively supply the amount of oil supply corresponding to the amount of oil supply or the amount of money.

When this type of oil supply apparatus is used for a fixed type oil supply machine, generally, a pump and a flow meter provided in a housing are connected to the pump and the flow meter at one end and an oil supply hose at the other end. Pipe, a fueling nozzle provided at the tip of the hose, a nozzle housing portion provided in the housing for housing the fueling nozzle, and the pump when the fueling nozzle is removed from the nozzle housing portion. It is composed of a switch mechanism that is driven and a preset mechanism that performs preset refueling by presetting a desired refueling amount or amount when refueling. Then, the preset refueling mechanism presets the refueling amount or amount, removes the refueling nozzle from the nozzle housing and refuels the fuel tank of the vehicle, etc.When the preset amount is reached, the pump drive stops and the fixed amount refueling ends. After that, the refueling nozzle is housed in the nozzle housing to prepare for the next refueling.

[0004]

However, unlike the normal refueling work in which the operator of the refueling station manually opens and closes the refueling nozzle, the preset type refueling device described above is different from the conventional refueling work.
When the preset amount has been reached, the pump is automatically stopped and a fixed amount of oil is supplied.Therefore, you do not notice that the oil supply nozzle is still open, but you do not notice the oil supply nozzle. It may be hung on the nozzle housing.
As a result, if the fueling nozzle is removed from the nozzle accommodating portion in the next fueling operation, there is a risk that the switch mechanism is immediately actuated and the pump is driven, and the oil liquid is instantaneously discharged.

The present invention is intended to improve the above-mentioned drawbacks of the prior art, and it is automatically checked whether or not the refueling nozzle is opened after the preset refueling is completed, and the refueling nozzle is opened. The present invention is to provide a refueling device that prohibits the next refueling work only when it is in operation.

[0006]

In order to achieve the above object, the invention according to claim 1 is a pump in which refueling corresponding to a desired refueling amount or amount preset as a preset value at the time of refueling is driven by a motor. A preset oil supply function that is performed by an oil supply nozzle through a flow meter and automatically stops when the amount of oil supply reaches the preset value by stopping the motor regardless of the valve opening state of the oil supply nozzle. Preset refueling in lubricator
The preset value set beforehand for oil and the flow meter
Compared with the refueling amount measured this time, both agreed
At this time, comparing means for outputting a quantitative signal, nozzle detecting means for detecting that the refueling nozzle has been returned to or removed from a predetermined housing portion, and refueling this time is preset refueling
When a quantitative signal is output from the comparison means and a detection signal is output from the nozzle detection means, the motor is energized for a predetermined time to drive the pump, and the pump drive means drives the pump. By comparing the total measured flow rate measured by the flow meter with a preset predetermined flow rate, and outputting a signal when the total measured flow rate reaches the predetermined flow rate, and the detection means. outputs a drive stop signal to the pump drive means by a signal from the means is input, characterized by being composed of a pump drive inhibiting means for inhibiting energization of the motor.
Further, the invention according to claim 2 is such that when the fuel is refilled, the preset
Corresponding to the desired refueling amount or amount set as a cut value
Refueling via a motor driven pump and flow meter
And refueling with the refueling nozzle.
Is reached regardless of whether the refueling nozzle is open.
Data that is automatically stopped by stopping the data
Preset in a lubricator with set lubrication function
Refueling this time when preset value is set for refueling
Preset memory to memorize that is a preset refueling
Means and the refueling nozzle are returned to the predetermined housing or
Nozzle detecting means for detecting that
Refueling this time is a preset refueling by the storage means
Is confirmed, and a detection signal is output from the nozzle detection means.
Then, the motor is energized for a predetermined time to drive the pump.
Moving pump driving means, and the pump driving means
The flow rate is measured by driving the pump.
The total measured flow rate is compared with a preset flow rate, and
A signal that outputs a signal when the total measured flow rate reaches a predetermined flow rate.
The valve opening detection means and the signal from the detection means are input.
Outputs a drive stop signal to the pump drive means by
A pump drive prohibiting means for prohibiting the energization of the motor.
It is characterized by being composed of.

[0007]

According to the structure of the above-mentioned claim 1, when the refueling of the appointed time is the preset refueling, the comparing means is set to the preset value.
This time, the amount of refueling is compared, and when both values match, a quantitative signal
Is output .

On the other hand, after the preset refueling is completed, the refueling nozzle is returned to the nozzle accommodating section, or the refueling nozzle is removed from the nozzle accommodating section at the start of the next refueling operation, and the nozzle detecting means determines the state of the refueling nozzle. To detect.

Therefore, the pump drive means is not refueled at this time.
When the fuel is reset, a quantitative signal is output from the comparison means.
When a detection signal such as a nozzle return signal or a nozzle removal signal is output from the nozzle detection means, the motor is energized for a predetermined time to drive the pump.

If the oil supply nozzle is opened while the pump is driven in this way, the oil liquid is discharged from the oil supply nozzle, so the nozzle open valve detection means measures the total amount measured by the flow meter. The measured flow rate is compared with a preset predetermined flow rate, a signal is output when the total measured flow rate reaches a predetermined flow rate, and the pump drive prohibiting means receives the valve opening detection signal from the nozzle opening detection means. By doing so, a drive stop signal is output to the pump drive means, and the energization of the motor is prohibited. Further, also in the configuration of claim 2, the preset
If a preset value is set when refueling,
The storage means is that this refueling is a preset refueling.
Memorize Then, when preset refueling is completed,
The pump drive means uses preset memory means
It is confirmed that the preset lubrication is used, and the nozzle detection
When the detection signal is output from the output means, the motor is
Energize and drive the pump. Thereby, according to claim 1,
As with the configuration, the nozzle opening detection means is measured by a flow meter.
Comparing the measured total measured flow rate with a preset predetermined flow rate
And outputs a signal when the total measured flow rate reaches the specified flow rate.
However, the pump Kudo prohibition means is from the nozzle opening detection means.
By inputting the valve opening detection signal of
A drive stop signal is output to the driving means to prohibit the motor from being energized.
Stop.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3 by taking as an example a case where a safety confirmation is made as to whether or not a refueling nozzle is opened after completion of preset refueling.

In FIG. 1, reference numeral 1 is a housing constituting a fixed type oil supply device, and the housing 1 is a lower housing 2.
And a upper housing 3, a pipe 4 whose one end is connected to a tank (not shown) is provided in the lower housing 2, and a pipe 4 is driven by a pump driving motor 5 in the middle of the pipe 4. A pump 6 and a flow meter 7 for measuring the amount of oil supply are provided, and the flow meter 7 is provided with a flow rate transmitter 8 for transmitting a flow rate signal proportional to the measured flow rate. A refueling hose 9 is connected to the other end of the pipe 4, and a refueling nozzle 10 is attached to the tip of the refueling hose 9. Reference numeral 11 denotes a nozzle accommodating portion provided in the lower housing 2 for accommodating the refueling nozzle 10 except during refueling work. The nozzle accommodating portion 11 is closed by removing the refueling nozzle 10. A switch 12 is provided which is opened by being hung on the storage portion 11. The motor 5 is driven when the switch 12 is closed and the motor 5 is stopped when the switch 12 is opened as described later. On the other hand, the nozzle housing portion 11 is provided with an oil recovery device 11A into which the tip of the oil supply nozzle 10 is inserted, and the oil recovery device 11A removes oil leaked from the oil supply nozzle 10 to, for example, an air separator (not shown). It is supposed to be returned.

On the other hand, a display 13 is provided on the front surface of the upper housing 3, and the display 13 is provided with an amount display 14, an oil supply amount display 15, and a unit price display 16. Further, a presetting device 17 is provided on the side surface of the upper housing 3, and the presetting device 17 is, for example, 10 liters, 15 liters, 20 liters, 30 liters, 40 liters.
Preset button 18 for presetting the amount of oil supplied in liters
A, 18B, 18C, 18D, and 18E are provided, and a desired preset amount can be set by pressing any of these preset buttons 18A to 18E. It should be noted that the preset buttons 18A to 18E are not limited to those for presetting the amount of refueling, but may be, for example, 1,0.
00 yen, 1,500 yen, 2,000 yen, 3,000 yen,
A fixed-price preset button for presetting 4,000 yen may be used, or both preset buttons may be provided at the same time. On the other hand, instead of the preset buttons 18A to 18E, a dial type setting device capable of stepless setting may be used. . Further, in the upper housing 3, a unit price setter 19 for setting the amount of money per unit flow rate, that is, a unit price, and a control circuit 20 described in detail in FIG. 2 are built in, and the unit price set by the unit price setter 19 is passed through the control circuit 20. Is displayed on the unit price indicator 16. The unit price setting device 19 is operated only when the unit price is changed, and is normally closed by the upper housing 3.

Next, FIG. 2 shows a specific configuration of the control circuit 20 described above. The input side of the control circuit 20 is connected to the flow rate transmitter 8, the switch 12 and the presetting device 17, and the output side thereof is a buzzer, It is connected to an alarm device 21 such as a lamp, a motor drive circuit 22, and a display drive circuit 23. Here, the motor drive circuit 22 is inserted between the AC power supply E and the motor 5 and controls the start and stop of the motor 5. The indicator drive circuit 23 is connected to the indicator 13 and converts a signal from a counting circuit described later into an indicator drive signal for each digit to cause the indicator 13 to perform a display operation.

On the other hand, the control circuit 20 includes AND circuits 24, 2
5, 26, 27, 28, 29, 30, 31, a knot circuit 32, 33, 34, 35, and a monostable multivibrator 36, 37, 38 (hereinafter referred to as a trigger MM circuit) used as a trigger circuit. , OR circuits 39, 40
And a counting circuit 4 for counting the flow rate signal from the flow rate transmitter 8.
1, 42, a storage circuit 43 for storing a predetermined flow rate (for example, 0.05 liter) that can be absorbed by the expansion of the fuel supply hose 9 at the time of safety confirmation, and a preset amount from the preset device 17 are stored. Memory circuit 44
And a comparison circuit 45 that compares the amount of oil supply counted by the counting circuit 41 with the predetermined flow rate stored in the storage circuit 43, and outputs a coincidence signal when the two match, and the counting circuit 42 as well.
A comparison circuit 46 that compares the amount of refueling counted in step 1 with the preset amount stored in the storage circuit 44, and outputs a predetermined amount signal when they match, a flip-flop circuit 47 (hereinafter referred to as FF circuit 47), As will be described later, a transmission circuit 48 that repeatedly transmits pulses at a predetermined interval t ₁ for a predetermined short time t _0, a counting circuit 49 that receives pulses from the transmission circuit 48 and counts the pulses, and a motor 5 that is repeatedly attached. A memory circuit 50 that stores the number of times of energization (for example, five times) and a comparison circuit 51 that compares the values of the counting circuit 49 and the memory circuit 50 and outputs a signal when both match. ing.

The flow rate transmitter 8 includes an AND circuit 24,
26, and the AND circuit 24 is connected to the input side of the counter circuit 26.
The AND circuit 26 is connected to the counting circuit 42.

The switch 12 is provided with reset terminals 41R and 49R of counting circuits 41 and 49 via a trigger MM circuit 36.
Is connected to the input sides of the AND circuits 26 and 29, and is also connected to the input sides of the AND circuits 24 and 25 via the knot circuit 32.
It is connected to the input side of the AND circuit 27 via the M circuit 37. The preset device 17 is connected to the storage circuit 44.

The input side of the comparison circuit 46 is the counting circuit 4
2. The storage circuit 44 is connected, and the output terminal 46A for outputting the quantitative signal is connected to the input sides of the AND circuits 24 and 25, and is also connected to the input side of the AND circuit 30 via the knot circuit 34. The counting circuit 42 is connected to the display 13 via the display driving circuit 23.

The output side of the AND circuit 25 is the transmission circuit 4
8 is connected to the input side, and the output side of the transmission circuit 48 is connected to the counting circuit 49 and the motor drive circuit 22 via the AND circuit 31 and the OR circuit 40. On the other hand, the output side of the AND circuit 27 is connected to the reset terminal 42R of the counting circuit 42 via the OR circuit 39, and
It is connected to the display drive circuit 23.

The input side of the comparison circuit 45 is connected to the counting circuit 41 and the storage circuit 43, and the output terminal 45A for outputting the coincidence signal is provided through the knot circuit 33 and the AND circuit 28.
Of the AND circuit 31 and the set terminal 47S of the FF circuit 47 as well as the input side of the AND circuit 31 via the knot circuit 35. The output side of the AND circuit 28 is connected to the reset terminal 4 of the FF circuit 47.
7R and the input side of the OR circuit 39. Moreover, the set output of the FF circuit 47 The AND circuit 29 is connected to the input side of the circuits 27 and 29.
The output side of is connected to the input side of the AND circuit 30, and the output side thereof is connected to the OR circuit 40.

Further, the input side of the comparison circuit 51 is connected to the counting circuit 49 and the storage circuit 50, respectively, and its signal output terminal 51A is connected to the reset terminal 48R of the transmission circuit 48 and the MM circuit for trigger 38. It is connected to the input side of the AND circuit 28.

The refueling device of this embodiment is constructed as described above. Next, this operation will be described with reference to the operation explanatory view shown in FIG.

Prior to operation, the fueling nozzle 10 is housed in the nozzle housing 11 and the switch 12 is open. In addition, the control circuit 20 is in the normal state and the FF circuit 4
The reset output terminal 47Q of No. 7 is in the set state. Further, at the time of the previous refueling, the valve closing confirmation of the refueling nozzle 10 is performed, the previous refueling amounts of the counting circuits 41, 42 are reset, and only the output sides of the knot circuits 32, 33, 34, 35 are in the output state (hereinafter, Other than the output terminal 51A of the comparison circuit 51, the output is stopped (hereinafter referred to as "L").

First, a normal refueling operation that does not use a presetting device will be described.

First, the refueling nozzle 10 is attached to the nozzle housing portion 11
Then, the switch 12 is closed, which causes the MM circuit 36 to be in the “H” state for a moment and output to the reset terminals 41R and 49R of the counting circuits 41 and 49.
In addition to resetting the previous count values of 1, 49, the MM circuit 37 is momentarily in the “H” state, the output side of the AND circuit 27 is momentarily in the “H” state, and the reset terminal of the counting circuit 42 is set via the OR circuit 39. 42R to reset the counting circuit 42. On the other hand, the output side of the AND circuit 27 is "H".
When it becomes a state, it outputs to the indicator drive circuit 23 and puts the indicator drive circuit 23 in an operable state (zero reset state of the indicators 14, 15). Further, when the switch 12 is closed, the output side of the AND circuit 29 is in the “H” state, and the AND circuit 30 is set to the “H” state and is output to the motor drive circuit 22 via the OR circuit 40. This allows the motor 5
Is supplied with an AC power source E to energize the motor 5 to drive the pump 6. With the above, refueling is possible.

When the refueling nozzle 10 is inserted into the fuel tank of the vehicle and opened in the above state, the oil liquid from the tank is discharged from the refueling nozzle 10 through the pipe 4, the pump 6, the flow meter 7, and the refueling hose 9. The flow rate at this time is measured by the flow meter 7, and the flow rate signal from the flow rate transmitter 8 provided in the flow meter 7 is output to the AND circuits 24 and 26. However, since the AND circuit 24 has its gate closed by the knot circuit 32, and the AND circuit 26 has its gate opened by the switch 12, the flow rate signal is
It is input to the counting circuit 42 via 6 and binary-coded decimal counting is performed as the flow rate, and is further integrated and displayed on the display 13 via the display driving circuit 23 every moment.

When the desired oil supply amount is reached, the oil supply nozzle 10 is closed, and the oil supply nozzle 10 is closed.
Store in 1. As a result, the switch 12 is opened and the AND circuit 29 is brought to the “L” state, the motor 5 is stopped via the OR circuit 40 and the motor drive circuit 22, and the drive of the pump 6 is stopped. This completes the normal refueling work.

Next, the preset refueling operation using the preset device 17 will be described.

First, prior to refueling work, the preset buttons 18A to 18E of the preset device 17 are operated to preset a desired refueling amount. As a result, the refueling amount is stored in the storage circuit 44 as the preset amount. next,
When the refueling nozzle 10 is removed from the nozzle housing portion 11, the switch 12 is closed, and the motor 5 is activated to be in a refuelable state as in the normal refueling operation described above. In this state, when the refueling nozzle 10 is inserted into the fuel tank of the vehicle and the valve is opened, refueling is performed, and the flow rate signal from the flow rate transmitter 8 is input to the counting circuit 42 via the AND circuit 26 and counted.

On the other hand, the comparison circuit 46 compares the preset amount of the storage circuit 44 with the amount of oil supply counted by the counting circuit 42 momentarily, and outputs a quantitative signal from the output terminal 46A when they match. As a result, the quantitative signal is input to the knot circuit 34, the output from the knot circuit 34 becomes the “L” state, and the input side of the AND circuit 29 is reset by the FF circuit 47. Since there is no input from the knot circuit 34 to the AND circuit 30, the AND circuit 30 is in the "L" state. Therefore, the rotation of the motor 5 is stopped through the OR circuit 40 and the motor drive circuit 22, the drive of the pump 6 is stopped, and the preset refueling is completed.

After the preset refueling is completed in this way, when the operator returns the refueling nozzle 10 to the nozzle housing portion 11, the switch 12 is opened and the gates of the AND circuits 26 and 29 are closed to prepare for the next refueling. .

However, at the time of preset refueling, the rotation of the motor 5 is stopped by the quantitative signal from the comparison circuit 46.
When returning to, the fueling nozzle 10 may be returned with the valve opened.

In view of this, in this embodiment, it is determined whether the fueling nozzle 10 is still open when the fueling nozzle 10 is stored in the nozzle housing portion 11, and the fueling nozzle 10 is left open. In this case, the safety confirmation that prohibits the next refueling operation can be performed.

The safety confirmation operation will be described below.

As described above, when the refueling nozzle 10 is housed and the switch 12 is opened, the output side of the knot circuit 32 is in the "H" state, and the input side of the AND circuit 25 is the output terminal of the knot circuit 32 and the comparison circuit 46. The signal of 46 A is input, and the AND circuit 25 is in the "H" state. As a result, the transmission circuit 48 is in the operating state and is in the "H" state only for the predetermined short time t _0, and is "L" for the predetermined short time t _1.
Repeatedly output a pulse that causes the state. This repetitive pulse repeatedly energizes the motor 5 for a predetermined short time t ₀ via the AND circuit 31, the OR circuit 40, and the motor drive circuit 22 to repeatedly drive the pump 6. As a result, the liquid is delivered to the oil supply nozzle 10 via the pipe 4, the pump 6, the flow meter 7, and the oil supply hose 9. In this case, even if oil leaks from the oil supply nozzle 10, it is collected by the oil recovery device 11A and does not leak to the outside.

On the other hand, when the knot circuit 32 is in the "H" state, the output from the knot circuit 32 is input to the AND circuit 24. The AND circuit 24 includes a comparison circuit 46.
Since the quantitative signal is output from the output terminal 46A, the gate of the AND circuit 24 is opened. As a result,
As described above, by repeatedly driving the pump 6 for a predetermined short time t ₀ , the flow rate measured by the flow meter 7 is output from the flow rate transmitter 8 as a flow rate signal each time, and this flow rate signal is passed through the AND circuit 24. Then, the counting circuit 41 performs a binarized decimal counting as the total refueling amount.

However, since the storage circuit 43 stores the predetermined flow rate, the comparison circuit 45 compares the predetermined flow rate with the total oil supply amount counted by the counting circuit 41. If the refueling nozzle 10 is still open, a repetitive drive of the pump 6 causes the refueling nozzle 10 to flow at a flow rate higher than a predetermined flow rate. For example, the oscillator circuit 48 outputs a second repetitive pulse to the motor 5 It is assumed that the coincidence signal is output from the output terminal 45A of the comparison circuit 45 and the opening of the refueling nozzle 10 is detected when is rotated only twice.

As a result, the coincidence signal from the comparison circuit 45 is input to the knot circuit 35, and the knot circuit 35 is set to "H".
The state is changed to the “L” state, and the gate of the AND circuit 31 is closed. As a result, although the pulse is continuously output from the transmission circuit 48, the output from the AND circuit 31 is stopped, the motor 5 is deenergized via the OR circuit 40 and the motor drive circuit 22, and the pump 6 To stop. Therefore, even if the oil supply nozzle 10 remains open, the oil liquid will not flow out any more. On the other hand, the coincidence signal from the comparison circuit 45 is input to the set terminal 47S of the FF circuit 47 and the F
The F circuit 47 is set to a set state, a set signal is output from the set output terminal 47Q, and the alarm device 21 is activated. Thereby, the operator of the gas station can know that the fuel nozzle 10 is still open.

Even if the alarm device 21 does not operate in this state or the alarm device 21 does not exist, the reset output terminal 47Q of the FF circuit 47 remains in the "L" state. In the next refueling operation, the AND circuit 29 is removed even if the refueling nozzle 10 is removed and the switch 12 is closed.
Since its output side remains in the "L" state, the motor 5 Is in the "L" state, the counter circuit 42 is not reset.

On the other hand, the memory circuit 50 stores a numerical value "5", that is, 5 times as the number of times of repeated energization of the motor 5, and pulses are sequentially input from the transmission circuit 48 to the counting circuit 49. Then, the comparison circuit 51 compares the count value of the counter circuit 49 with the number of times of repeated energization stored in the storage circuit 50, and outputs a coincidence signal having a count value of "5" from its output terminal 51A. This coincidence signal is input to the reset terminal 48R of the transmission circuit 48, and the transmission circuit 48 enters the transmission stop state regardless of the output state of the AND circuit 25. Further, the coincidence signal is input to the MM circuit 38, and the MM circuit 3
8 is instantly in the "H" state and outputs a trigger pulse to the AND circuit 28, but the AND circuit 28 receives the coincidence signal from the comparison circuit 45 input via the knot circuit 33.
Since the gate is closed, the FF circuit 47 is not reset.

Next, as described above, it is noticed that the fueling nozzle 12 is still opened by the operation of the alarm device 21, and the fueling nozzle 10 is removed from the nozzle housing portion 11 again.
As a result, the switch 12 is closed, and the MM circuit 36 is momentarily set to the “H” state and input to the reset terminals 41R and 49R of the counting circuits 41 and 49 to reset the counting circuits 41 and 49. On the other hand, the MM circuit 37 is also in the "H" state for a moment, and the AND circuit 27 Since it is in the “L” state, the AND circuit 27 does not output,
The counting circuit 42 is not reset.

Then, the worker closes the oil supply nozzle 10 which has been removed as described above, and after confirming this, stores it again in the nozzle housing portion 11. As a result, similarly to the above, the output side of the knot circuit 32 is in the "H" state, the AND circuit 25 is in the "H" state, the pulse is repeatedly output from the transmitting circuit 48, and the "H" state is maintained for a predetermined short time t _0. Then, the motor 5 is repeatedly energized via the AND circuit 31 and the OR circuit 40. At this time, the refueling nozzle 10 is closed, so that even if the pump 6 is driven, only a flow rate about the expansion of the refueling hose 9 flows.

When the knot circuit 32 is in the "H" state, this output is input to the AND circuit 24, and the flow rate measured by the flow meter 7 is output from the flow rate transmitter 8 as a flow rate signal each time. It is counted by the counting circuit 41 via 24. On the other hand, the comparison circuit 45 includes the storage circuit 43.
Although the predetermined flow rate stored in the table is compared with the total amount of refueling counted by the counting circuit 41, as described above, the refueling nozzle 10
Since the valve is closed, the flow rate of the flow meter 7 is smaller than the predetermined flow rate, and the coincidence signal is not output from the comparison circuit 45. Therefore, the output side of the knot circuit 33 is in the "H" state, and the gate of the AND circuit 28 is opened.

Further, since the pulse from the transmission circuit 48 is input to the counting circuit 49, when 5 pulses of the pulse are input, the stored numerical value "5" of the storage circuit 50 coincides with each other, and the comparison circuit 51 outputs. The coincidence signal is output from the output terminal 51A, and the state becomes "H". As a result, the signal from the comparison circuit 51 is input to the reset terminal 48R of the transmission circuit 48 to stop the transmission from the transmission circuit 48, and the AND circuit 28 is momentarily set to "H" via the trigger FF circuit 37.
State. Therefore, the output from the AND circuit 28 is input to the reset terminal 47R of the FF circuit 47 and the FF circuit 47R is reset.
Reset circuit 47 Open the gate and prepare for the next refueling operation. With this,
The output from the AND circuit 28 is input to the reset terminal 42R of the counting circuit 42 via the OR circuit 39 to reset the counting circuit 42. As a result, in the comparison circuit 46, since the counting circuit 42 is reset, the output of the quantitative signal from the output terminal 46A is stopped. Therefore, AND circuit 2
The gates of 4, 25 are closed, and the knot circuit 34 is "H".
Then, the gate of the AND circuit 30 is opened to prepare for the next refueling operation. By the above, all the circuits have returned to the state before the operation.

Further, after the preset refueling, when the refueling nozzle 10 is housed in the nozzle housing 11 with the valve closed, the same safety confirmation as described above is automatically performed. Of course, since the coincidence signal is not output, the operator does not notice this at all.

Therefore, in this embodiment, the pump 6 is repeatedly driven with a minute discharge amount by the time management, so that even if the oil supply nozzle 10 is opened, a long time pump as shown in FIG. As shown in FIG. 5, the overshooting amount after the valve opening detection can be made smaller than that of the continuous driving, and therefore the leakage amount can be prevented to the minimum. In particular, when the comparison circuit 45 outputs the coincidence signal immediately after the oscillation circuit 48 outputs the pulse of the predetermined number of times, the overshoot amount can be substantially set to zero, and the excess amount can be reduced. The amount of leakage can be reduced.

Further, in this embodiment, the safety confirmation operation of the nozzle opening valve is performed only at the time of preset refueling, and it is not necessary to perform this safety confirmation operation at the time of normal refueling, so that the next refueling can be performed quickly. Become.

The control circuit 2 is used in the above embodiment.
0 is a circuit configuration as shown in the figure, the pump drive circuit is configured to include a knot circuit 32, AND circuits 25 and 31, and an oscillation circuit 48, and the nozzle opening detection circuit is a counting circuit 41, a storage circuit 43, a comparison circuit 45, A configuration including the FF circuit 47,
The pump drive prohibition circuit is a knot circuit 35 and an AND circuit 31.
However, the present invention is not limited to this, and the control circuit 20 is configured by a microcomputer including a central processing unit (CPU), a memory circuit, etc., and the microcomputer transmits the flow rate via an interface circuit. It may be connected to the device 8, the switch 12, the presetting device 17, the alarm device 21, the motor drive circuit 22, and the display drive circuit 23 to execute the refueling operation by program control. In this case, the processing may be performed according to the flow shown in FIG. That is, at the time of preset refueling,
When the refueling amount is preset by the charging device 17.
The preset flag is turned on. Preset refueling is over
Finished, the refueling nozzle 10 was hung on the nozzle housing portion 11.
Sometimes, depending on whether the preset flag is ON or OFF, OF
If it is F, the pump driving motor 5 is stopped, and if it is ON,
For example, the motor 5 is driven to shift to the safety confirmation operation. Therefore,
The preset flag constitutes a preset storage means.
become.

The checking operation of whether or not the fueling nozzle 10 is opened has been described as being performed after the preset fueling is completed, that is, when the fueling nozzle 10 is hung on the nozzle housing portion 11 and the switch 12 is opened. However, the configuration may be performed before the refueling is started, that is, when the refueling nozzle 10 is removed from the nozzle housing portion 11 and the switch 12 is closed. In this case, the knot circuit 32 is abolished and the transmission circuit 48 starts transmitting a pulse when the switch 12 is closed and makes a slight circuit change such as inserting a delay timer at the output side of the AND circuit 29. The pump 6 is repeatedly driven at the start of the next refueling after the preset refueling to check the nozzle opening, and only when the refueling nozzle 10 is normally closed, the pump for refueling after the delay time by the delay timer. This can be easily realized by adopting a driving configuration. On the other hand, the number of times of checking the pump is not limited to 5 times, but may be any number of times.

Further, the control circuit 20 includes the upper housing 3
Although it has been described as being provided inside, it may be provided in the office of the gas station. On the other hand, although the preset refueling device 17 is also described as being provided in the upper housing 3, it may be provided in the refueling nozzle 10 or in the refueling hose 9 in the vicinity thereof, and further in the office or on the island separately from the refueling device. A preset device panel may be provided. Further, the housing 1 constituting the oil supply device has been described as being composed of the lower housing 2 and the upper housing 3, but it is needless to say that the housing 1 may be a single housing because of the design.

[0051]

The refueling device according to the present invention is as described above in detail, and automatically confirms whether or not the refueling nozzle remains open after the preset refueling is completed, and keeps the valve open. In this case, it is configured so that the next motor drive can be prohibited.Therefore, it is possible to reliably prevent the accident that the pump is started during the next fueling operation with the fueling nozzle open, and at the same time, to ensure safety. Since the checking operation is performed only during preset refueling, when the current refueling is normal refueling, the next refueling can be quickly performed.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an oil supply device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing a specific configuration of a control circuit in FIG.

FIG. 3 is an operation explanatory diagram of FIG. 2;

FIG. 4 is an overshoot amount characteristic diagram when the pump is driven once for the nozzle confirmation operation.

FIG. 5 is an overshoot amount characteristic diagram when a pump is driven many times for a nozzle confirmation operation.

FIG. 6 is a flowchart for arithmetic processing.

[Explanation of symbols]

 1 Housing 4 Piping 5 Motor 6 Pump 7 Flowmeter 8 Refueling Nozzle 9 Refueling Hose 11 Nozzle Storage 12 Switch 13 Display 17 Preset Device 20 Control Circuit 21 Alarm 22 Motor Drive Circuit 23 Display Drive Circuit

Claims (2)

[Claims] 1. When refueling, a refueling corresponding to a desired refueling amount or amount set in advance as a preset value is performed by a refueling nozzle through a pump driven by a motor and a flow meter, and the refueling amount reaches the preset value. Te lubricator odor with automatically preset fueling ability to quantify stopped by stopping regardless the motor to open state of the oil supply nozzle when a predetermined preset value during a preset fueling
Compare the amount of refueling this time measured by the flow meter,
Party and comparing means for outputting a quantified signal when a match, the nozzle detection means for detecting that the oil supply nozzle back or removed to a predetermined accommodating portion, from said comparison means this refueling a preset fueling
Is output quantified signal, and when the detection signal from the nozzle detection means is outputted, the motor is energized a predetermined time, a pump drive means for driving the pump, the pump is driven by 該Po pump drive means a nozzle valve opening detection means with a predetermined flow rate set in advance the total measurement objective flow rate measured by the flow meter, which outputs a signal when the measuring the total target flow rate reaches a predetermined flow rate by, 該検 known means outputs a drive stop signal to the pump drive means by a signal from the input, characterized by being composed of a pump drive prohibiting means to prohibit energizing the motor oil supply device. 2. Set a preset value before refueling
The refueling amount corresponding to the specified amount or amount of refueling specified
Refueling nozzle via pump and flow meter driven by
When the refueling amount reaches the preset value,
The motor is stopped regardless of the valve opening state of the oil supply nozzle.
Preset lubrication function that automatically stops the fixed amount by
In a refueling device equipped with Refueling this time when preset for refueling
Preset memory to memorize that is a preset refueling
Means and The refueling nozzle has been returned to or removed from the specified housing.
Nozzle detecting means for detecting
Confirmed that the refueling this time was a preset refueling.
And a detection signal is output from the nozzle detecting means.
The motor for a predetermined time to drive the pump.
Pump drive means, The pump is driven by the pump driving means.
The total measured flow rate measured by the flowmeter is preset
Compared with the specified flow rate, the total measured flow rate becomes the specified flow rate.
Nozzle opening detection means that outputs a signal when it reaches, When the signal from the detection means is input, the pump
Output a drive stop signal to the drive unit to energize the motor.
The pump drive prohibition means for prohibiting
Refueling device to collect.