JPS61152600A - Refueling device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a refueling device used at gas stations, etc. Specifically, after inserting the refueling nozzle into the refueling port of a car, The present invention relates to a refueling device that can be automatically filled up without the need for a worker to perform minute refueling.

(Prior art) Generally, when refueling is carried out at a gas station, etc., one worker inserts a refueling nozzle into the refueling port of a car to refuel, and refueling is automatically stopped when the car is about 4 full full. After that, the worker operates the oil supply nozzle to supply a small amount of oil.

This is done by completely filling the fuel tank.

An example of a refueling nozzle used in such refueling work is disclosed in Japanese Patent Laid-Open No. 54-34117. Therefore, this oil supply nozzle will be briefly explained below with reference to FIGS. 6 and 7.

A fuel nozzle body 1 is provided with a gasoline flow path 2, and a valve seat 3 is provided in the middle of the flow path 2. Valve seat 3
The main valve body 4 is seated on the valve seat 3, and the hole 3a of the valve seat 3 opens and closes as the main valve body 4 moves into and out of the seat. A sub-valve element 5 is seated on the upper part of the main valve element 4, and a micro passage 4a provided in the main valve element 4 opens and closes as the S valve element 5 moves into and out of the seat. A coil spring 7 is interposed between the sub-valve body 5 and the spring holder 6, and the coil spring 7 is always attached in the direction of pressing the sub-valve body 5 and the main valve body 4 against the valve seat 3. Forced.

A sleeve 8 is attached to the main body l below the valve seat 3, and a shaft 9 and an O-ring 10 are attached to the mounting seat 11a within the sleeve 8.
The shafts 11 attached to the shafts 11 are slidably fitted to each other. The lower part of the shaft 9 is fixed to an operating lever 12, and the shaft 9 is pressed downward by the biasing force of a coil spring 13 interposed therein. Incidentally, reference numeral 14 denotes an operating lever retaining rod for maintaining the operating lever 12 in the lifted state. and.

The shafts 9 and 11 are provided with notches, and two roll rods 15 and 16 are disposed in the notches of the shafts 9 and 11.

A lid 17 is attached to the side of the refueling nozzle body l, and the lid 1
A diaphragm 18 is attached to the inside of 7. A negative pressure chamber 19 is formed between the lid 17 and the diaphragm 18. A plate 2G is integrally fixed to the diaphragm 18, and the plate 20 has elongated holes 20a, 20a r provided in the plate 20.
W: JK The above-mentioned roll burrs 15 and 16 are supported. A coil spring 21 is interposed in the diaphragm 18, and the urging force of the coil spring 21 causes the roll rods 15, 16 to be pressed against the notches of the shafts 9, 11.

In this state, when the operating lever 12 is lifted against the biasing force of the coil spring 13, the sleeve 8 and the shaft 9 will rise, and the shaft 11 will also rise via the Ronil rods 15 and 16. The roll rods 15, 16 are slidable along the elongated holes 20a, 20a in the upward direction of the shirt (9.11).

The refueling nozzle body 1 has t. A mounting seat 11 is provided,
A holding member 23 for holding the discharge pipe 22 and a valve seat 24 are attached to the mounting seat 1a. Holding member 23
is tightened by a nut 25 screwed onto the mounting seat 1a),
The valve seat 24 is pressed against the annular protrusion 1b.

A valve body 26 is seated inside the valve seat 24.
The shaft portion 26a is a boss portion 23a provided on the holding member 23.
is mated to. A coil spring 2 is attached to the valve body 26.
7 is interposed, and the valve body 26 is always pressed in the direction of closing the valve seat 24 by the bias of the coil spring 27.

The valve seat 24 is provided with a gap 24a for generating negative pressure due to the venturi effect when the valve is opened.
4a is a passage 2 formed in the main body 1 and the holding member 23;
It is connected to 8. One side of the one passage 28 is connected to the negative pressure chamber 19 mentioned above, and the other side is connected to the atmosphere introduction hole 22a provided at the tip of the discharge pipe 22 through a small diameter pipe 29. It's communicating.

To explain the operation of the refueling nozzle configured as described above, first, when refueling is performed, the discharge pipe 22 is inserted into the refueling port of the automobile, and the operating lever 12 is lifted. Then, since the roll rods 15 and 16 are arranged as described above, the shafts 9 and 11 rise together,
Upon completion, the sub-valve body 5 resists the biasing force of the coil spring 7 and is pushed up slightly. When the sub-valve body 5 is pushed up, a small amount of gasoline passes through the minute passage 4a and the hole 3a.

Furthermore, when the operating lever 12 is lifted, the shaft 11
is opened by pushing up the main valve body 4, and gasoline flows in through the hole 3a. At this time, since a small amount of gasoline has already flowed in from the passage 8, the hydraulic pressure difference before and after the main valve body 4 has become small, and the lever 12 can be easily pulled up.

When the main valve body 4 is pushed up and gasoline flows in, the one-cylinder body 26 is pressed against the biasing force of the coil spring 27 to open the valve. Then, Ganori/ is discharged from the discharge pipe 22,
Refueling takes place. At this time, the operating lever 12 is latched onto the latch rod 14, so there is no need for one worker to continue holding the operating lever 12 during refueling. When gasoline flows through the flow path 2 and the discharge pipe 22, negative pressure is generated in the passage 28 of the gap 24a1 due to the venturi effect. However, since the air vi 24m and the passage 28 are open to the atmosphere via the pipe 29 and the atmosphere introduction hole 221, even if negative pressure is generated, it is negligible. Therefore, the diaphragm 18 is not activated by this negative pressure.

Refueling is performed in this manner, and the liquid level in the fuel tank gradually rises until it reaches the atmosphere introduction hole 22a. However, gasoline is vigorously discharged from the discharge pipe 22.

Gasoline bubbles occur inside the fuel tank.

These bubbles block the air inlet 22a before the liquid level.

When the air inlet 22a is blocked by bubbles, negative pressure is generated in the air gap 24a2 and the passage 28 due to the venturi effect described above.
The inside of the negative pressure chamber 19 communicating with the passage 28 also becomes negative pressure. Then, the diaphragm 18 resists the biasing force of the coil spring 21 and moves to the left Kffi position in FIG. Salaries 15 and 16 will be removed.

Ninth, the biasing force of the coil spring 7 presses the sub-valve body 5 and the main valve body 4 downward to close the hole 3a and stop the oil supply.

This stoppage of refueling is due to the generation of bubbles.

This is not because the fuel tank is completely full.

In order to completely fill up the fuel tank, one worker moves the operating lever 12, whose tip was previously latched onto the latching rod 14.
Lift it up again. Then, the shaft 9 rises and the upper end of the shaft 9 comes into contact with the mounting hole of the shaft 11, so that the shaft 11 also rises. Therefore, the sub-valve body 5 is pushed up by the shaft 7) 11, and the minute passage 4! A small amount of gasoline flows from the

The fuel tank becomes completely full and refueling is completed. If the operating lever 12 is pulled down to the lowest end after refueling is completed, the roll 411 will be moved by the biasing force of the coil spring 21.
5.16 is pressed, and the state returns to the same state as in FIGS. 46 and 7.

(Problem to be Solved by the Invention) In the above-mentioned refueling operation, refueling is automatically stopped even though the fuel tank is not completely full due to the gasoline bubbles forming in the fuel tank. It was put away.

Therefore, one worker operated the refueling nozzle again to perform a small amount of refueling, thereby filling the fuel tank completely.

However, the gas station worker waits for the refueling nozzle to stop automatically. Since the Chibis work must be carried out efficiently, it is required to minimize the need for human labor during the refueling work itself. The above-mentioned operation of performing minute oil supply was contrary to such requirements.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to automatically fill a fuel tank to 50% without the need for one worker to refuel a small amount. The purpose is to provide a refueling device.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a fuel nozzle with a bubble detection sensor 2 and a liquid level detection sensor.

Refueling control means that controls the amount of subsequent refueling when the foam detection sensor detects bubbles generated after refueling a certain amount of refueling, and stops refueling when the liquid level after the controlled refueling is detected by the liquid level detection sensor. This is a configuration in which - is provided. .

(Function) To explain the function of the present refueling device having such a configuration, first, the refueling nozzle is inserted into the fuel tank of the automobile and refueling is started. When the liquid level in the fuel tank rises and becomes nearly full, a bubble detection sensor detects bubbles generated near the liquid level. Then, based on this detection, the oil supply control means controls the amount of oil supplied, and either reduces the amount of oil supplied thereafter or completely stops the oil supply.

Then, as the liquid level gradually rises by performing a small amount of oil supply, the bubbles near the liquid level disappear, and the liquid level detection sensor detects the liquid level. When the refueling control means stops refueling based on this detection, the fuel tank is completely full. still,? If refueling is to be completely stopped based on the detection by the ¥i1 detection sensor, a timer mechanism is used to perform a small amount of refueling after a certain period of time has elapsed.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to t45. However, the same reference numerals will be given to the constituent members shown in FIGS. 6 and 7, and the explanation thereof will be omitted as appropriate.

FIG. 4 shows a schematic configuration of the oil supply device of this embodiment, in which a hose 101 d of the oil nozzle 100 is connected to the oil supply '#103 in the oil supply box 102.

On the other hand, a fuel pipe 104 whose one end is connected to a storage tank (not shown) is connected to a fuel pump 105, and the oil pump 105 is driven by a fuel pump driving motor 106 via a belt 107.

The motor 106 for the oil supply pump mm is the motor drive processing unit 10.
8, and a drive processing circuit for the motor 106 is constituted by this motor drive processing section 108, a bubble detection sensor, and a liquid level detection sensor.

A flow meter 109 is connected to the oil supply pump 105, and the aforementioned oil supply pipe 103 is connected to the flow meter 109. Also,
A flow rate pulse transmitter a 110 is disposed above the flow meter 109, and based on the signal from this transmitter 110, an indicator 111 is activated.
The flow rate is displayed. 112 is a motor drive switch.

Next, the configuration of the refueling nozzle 100 used in a non-example will be described with reference to FIGS. 1 and 2. The discharge pipe 220 and the atmosphere introduction hole 221 are connected to a side diameter pipe 29, and an ultrasonic sensor 201 used as a grIIT detection sensor is installed in the middle of the pipe 29. A signal emitted from this ultrasonic sensor 201 is sent to a motor drive processing section-108.

The pipe 29 communicates with the passage 28, and one passage 28 is connected to the negative pressure chamber 2.
It is connected to 02. The negative pressure chamber 202 is the chamber 20 inside the main body l.
It is defined by the darkness between the diaphragm 204 and the lid body 205 attached to No. 3. The lid body 205 is equipped with a pair of (U-shaped) photoelectric switches 2 that can be fitted with a type of S-contact type switch.
06 is installed).

A shielding plate 207 for blocking the optical axis of the photoelectric switch 2060 is attached to the diaphragm 204 at a position corresponding to the photoelectric switch 206K.

In this way, in this embodiment, the air introduction hole 22a K
il "噸f" - Four rainbow bubble detection sensors are formed between the diaphragm 2Q4 and the photoelectric switch 206, and the diaphragm 204 is activated and the shielding plate 207 is activated by the photoelectric switch 206.
When the main shaft of the pump is interrupted, the companion lubrication pump drive motor 106, which is still operating, is stopped in response to a command from the motor/drive processing section 108. Rima l 86
In the figure and FIG. 7, the diaphragm mechanism used to apply a K force to the roll rods 15 and 16 to close the main valve body 4 is shown.

In this embodiment, it is used as a component of a bubble detection sensor.

In this embodiment, one emergency switch 208 is provided. This is provided assuming that the oil supply pump driving motor 106 cannot be stopped successfully when the bubble detection sensor described above detects bubbles. That is, a block 209 is attached to the base end of the emergency switch 2080, and the roll rods 15 and 16 are engaged with the block 209. The emergency switch 208 has a coil spring 21
0 is interposed, and the roll li 15.16 is pressed to the left in FIG. 2 by the biasing force of the coil spring 21G. Then, when the emergency switch 208 is pressed while the main valve body 4 is raised and the valve is opened, the
In the same way as the diaphragm 18 operates in the figure, the main valve body 4 rises and descends to close the valve.

Next, the operation of this embodiment configured as one or more will be explained.

First, in order to refuel, the discharge pipe 22 is inserted into the refueling port of the automobile, and the operating lever 12 is pulled up.

Then, gasoline is discharged from the discharge pipe 22 in the same manner as explained in FIG. 6 and FIG. 7. Then, one worker can engage the operating lever 12 on the latch rod 14 to cause the refueling nozzle 100 to automatically refuel, and can leave his/her post until a certain amount of refueling is completed.

As the liquid level gradually rises (due to the above refueling), first,
Bubbles generated near the liquid surface pass through the air introduction hole 22a.

Then, due to the venturi effect described above, the negative pressure chamber 202
Negative pressure is generated at , and the diaphragm 204 is actuated. Then, the optical axis of the photoelectric switch 206 is blocked by the shielding plate 207K, and the rotation of the fuel pump drive motor 106 is stopped (according to the command of the motor drive process $108). therefore,
The operation of the oil supply pump 105 is also stopped, and oil supply is completely stopped.

By the way, a timer mechanism is attached to the motor drive processing unit 108 in this embodiment, so that the motor 106 is restarted after a certain period of time has elapsed since the rotation of the motor 106 is stopped due to the detection of the bubble sensor. It has become. However, the rotation speed of the motor 106 after this restart is lower than the rotation speed before stopping.

In this way, a timer mechanism is provided to prevent gasoline from being discharged for a certain period of time after the rotation of the motor 106 has stopped, so that within this period, the bubbles that have been generated near the liquid level will almost disappear naturally. . Moreover, even if gasoline is discharged again by restarting the motor 106,
Since the motor 106 rotates at a low speed, the amount of gasoline supplied is very small. Therefore, bubbles are hardly generated by refueling at this time.

Next, the liquid level rises due to this minute oil supply, and the ultrasonic sensor? When 201 detects the liquid level, the ultrasonic sensor? 201 sends a signal to the motor drive processing section 108. Based on this signal, the motor drive processing unit 108 stops the rotation of the motor 106 and stops the oil supply.

Through the above series of actions, the fuel tank of the automobile can be completely filled.

Then, in the unlikely event that a failure occurs in the bubble detection sensor, liquid level detection sensor, motor drive processing section 108, etc.

Even if refueling is not stopped, pressing the emergency switch 208 will forcibly shut off the flow path 2 in the refueling nozzle body 1, and when refueling is detected, the motor 106 will be temporarily stopped completely by the timer mechanism. A case will be described in which the motor 106 is stopped at a certain time and then the motor 106 is rotated at a low speed. However, when bubbles are detected, the motor 106 may not be completely stopped, but only switched to a low speed rotation. In this case, the rotational speed of the motor 106 is appropriately adjusted so that the bubbles disappear naturally while the motor 106 is rotating at a low speed.

Further, in the above embodiment, an example was shown in which the amount of oil supplied after the foam centimeter 7jE foam was verified was controlled by controlling the rotation of the motor 106, but it is also possible to perform this by using a valve mechanism. good. That is, as shown in FIG. 4, a self-excited valve-closing mechanism using a solenoid valve or the like is installed at an arbitrary location downstream of the oil supply pump 105, and this automatic valve-closing mechanism operates the timer mechanism as described above. Use this to completely stop refueling or adjust the amount of refueling as appropriate.

To quickly eliminate the above series of effects.

Figure 5 shows a flow diagram.

FIG. 3 shows an embodiment different from the embodiment described above.

That is, unlike the case in FIG. 2, the charging switch 206 is attached to the lid 211K on the opposite side from the lid 205. And the shielding plate 20 in the diaphragm 204
7 is also reversed from that shown in FIG. 2, and the shielding plate 207 extends inside the chamber 203 toward the photoelectric switch 206.

In the case of the MXz diagram, gasoline bubbles are connected to the atmosphere introduction hole 22a.
When the negative pressure chamber 202 becomes negative pressure due to the negative pressure being reached, it is not completely inconceivable that the bubbles may reach the negative chamber 202 through the pipe 291 passage 28. However, the third
If the photoelectric switch 206 and the shielding plate 207 are arranged as shown in the figure, even if gasoline bubbles reach the negative pressure chamber 202, no problem will occur. Incidentally, there is a problem with installing the emergency switch 208 shown in FIG. 2, but in order to perform the same action as explained in FIG.
8 is relatively easy to install.

(Effects of the Invention) As explained above, in the present invention, two centimeters, a bubble detection sensor and a liquid level detection sensor, are provided in the refueling nozzle, and the amount of refueling and stopping of refueling are controlled based on these sensors. So I decided to do it.

After the worker inserts the refueling nozzle into the refueling port.

The fuel tank can be automatically filled to the full without the need for workers to perform small refueling tasks.

And in the example, as a bubble sensor.

Since we decided to use the existing diamond slam mechanism and photoelectric switch, the structure is not so complicated compared to the conventional 4. Furthermore, since a non-contact switch such as a photoelectric switch is used, the operation of the diaphragm is not inhibited.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the structure of a refueling nozzle used in an embodiment of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is the same as shown in Fig. 2. is a sectional view of another embodiment, Figure 4 is a schematic diagram showing the configuration of the present oil supply device, Figure 5g5 is a flowchart for the operation of the oil supply device shown in the embodiment, and Figure 6 is the structure of a conventional oil supply nozzle. A cross-sectional view showing
FIG. 7 is a sectional view taken along 1--1IIIK of FIG. 6. 100-...Refueling nozzle, 105...
・Refueling pop 106--Refueling pump drive motor 108...Motor drive processing section 201...Ultrasonic sensor? (Liquid level detection cm) 204・
...Diaphragm (a detection sensor) 206...Photoelectric switch (a detection sensor) 22a...Atmospheric inlet hole % Discharge Applicant Tokico Co., Ltd. Figure 2 Figure 4

Claims (5)

[Claims] (1) A foam detection sensor and a liquid level detection sensor are provided in the refueling nozzle, and when the foam detection sensor detects bubbles generated after a certain amount of refueling, the subsequent refueling amount is controlled, and the liquid level after refueling is controlled by the control. 1. A refueling device comprising: a refueling control means for stopping refueling when the liquid level detection sensor detects the above. (2) The fuel supply device according to claim 1, wherein the bubble detection sensor includes a diaphragm mechanism that communicates with the atmosphere introduction hole at the tip of the fuel supply nozzle, and a non-contact switch that detects the operation of the diaphragm mechanism. (3) The oil supply device according to claim 2, wherein the non-contact switch is a photoelectric switch. (4) The oil supply control means according to any one of claims 1 to 3, wherein the oil supply control means is constituted by a motor for driving the oil supply pump and a motor drive processing circuit that controls the rotation of the motor. Device. (5) The oil supply device according to any one of claims 1 to 3, wherein the oil supply control means is a valve mechanism provided in an oil passage downstream of the oil supply pump.