JPH09142597A - Oil feed nozzle and oil feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the generation of foam on a liquid level and detect the liquid level correctly, by providing the front end of a discharge pipe with a movable member, which moves upward when the front end of the pipe is closed as the liquid level in a tank oil feed opening rises, and by detecting the upward movement of the movable member by the use of a liquid level detection means and then outputting it. SOLUTION: When a main valve 20 is opened by the operation of the nozzle lever 24 of an oil feed nozzle 3, a valve element 32 opens, and liquid oil passes between a restrictor 31 and the valve element 32 and flows to a discharge opening 36. In a discharge opening 36, a sensor plate 40 is in contact with a shaft support member 37 by being pressed by discharge pressure, therefore the liquid oil passes a space between the outer circumference of the sensor plate 40 and the inner circumference of a discharge pipe 16, and it is discharged to an oil feed opening. When a liquid level rises, after that, and the liquid oil reaches the position of the restrictor 31, negative pressure is produced in the discharge pipe 16, and the sensor plate 40 moves upward away from a reed switch 41. Consequently, the switch 41 is opened to be turned off, and it outputs a liquid detection signal to a controller.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling nozzle and a refueling device configured to prevent bubbles from being mixed with replenished oil liquid to cause bubbles on the liquid surface.

[0002]

2. Description of the Related Art For example, at a gas station, each oil type (gasoline,
Refueling device for each (light oil) is installed. Various devices such as a pump, a pump drive motor, a flow meter, a solenoid valve, etc., were installed inside the refueling device to pump up the oil liquid in the underground tank, and the front or side of the refueling device was connected to the pump. The hose is pulled out, and a fuel nozzle is connected to the end of the hose.

In the fueling nozzle, when the discharge pipe is inserted into the tank fueling port of the automobile and the nozzle lever is rotated, the main valve in the nozzle body opens and the oil liquid pumped by the pump is discharged. Discharge to the tank filler port.
This type of refueling nozzle is provided with an automatic valve closing mechanism that automatically closes the main valve by detecting a rise in the liquid level at the tank refueling port when the tank is fully refueled.

As a conventional automatic valve closing mechanism, for example, an air introduction hole is provided at the tip of the discharge pipe, and a negative pressure is generated by the flow of the oil liquid by utilizing the Venturi effect in the flow passage of the oil supply nozzle so that the liquid surface is It has a negative pressure generation part that mixes the air sucked from the air introduction hole into the oil liquid by negative pressure generation until the air introduction hole is closed, and the liquid level closes the air introduction hole and the negative pressure generation part There is known a structure having a diaphragm that locks the valve element in the valve opening position until the negative pressure of (1) is introduced.

In this automatic valve closing mechanism, when the atmosphere introducing hole is closed by the liquid surface of the oil that has been supplied, the negative pressure generated in the negative pressure generating portion is introduced into the diaphragm chamber, so that the diaphragm is closed. It operates in the unlocking direction of. That is, when the air introduction hole at the tip of the discharge nozzle is blocked by the liquid surface, the diaphragm is displaced by the negative pressure from the negative pressure generating portion, and the valve body of the oil supply nozzle operates in the valve closing direction.

[0006]

However, in the oil supply nozzle having the automatic valve closing mechanism as described above, since the negative pressure is generated by the flow of the oil liquid by opening the main valve, the negative pressure is generated from the discharge pipe. The sucked air is ejected in a mixed state of the oil liquid. Therefore, when the fuel tank of an automobile is filled with full oil, bubbles are likely to be generated on the liquid surface of the oil filling port into which the fueling nozzle is inserted, and there is a problem that accurate liquid level detection, that is, full oil filling cannot be performed. .

Further, in the conventional oil supply nozzle, since the oil liquid discharged from the discharge pipe directly collides with the liquid surface, air is trapped by the liquid at the time of collision, so that bubbles are likely to be generated on the liquid surface. Further, conventionally, in order to prevent bubbles generated on the liquid surface from overflowing from the oil supply port, after refueling up to near full tank, the amount discharged from the oil refueling nozzle is reduced to a small amount, or little by little, or It was necessary to perform troublesome refueling control such as intermittent refueling.

Therefore, an object of the present invention is to provide an oil supply nozzle and an oil supply device which solve the above problems.

[0009]

In order to solve the above problems, the present invention has the following features. Claim 1
The invention of No. 1 is provided in the nozzle body, a nozzle main body to which a refueling hose is connected, a discharge pipe extending from the nozzle main body and inserted into a tank refueling port to discharge oil liquid,
A valve mechanism that is opened by a turning operation of a nozzle lever, and is movably provided at the tip of the discharge pipe, and the tip of the discharge pipe is blocked with oil liquid as the liquid level of the tank oil supply port rises. And a liquid level detecting means for detecting that the movable member has moved upward.

Therefore, according to the first aspect, since it is possible to detect the liquid level by detecting that the movable member provided at the tip of the discharge pipe has moved upward due to the rise of the liquid level at the tank filler port, it is possible to detect bubbles on the liquid level. Is less likely to occur, and it is possible to accurately detect the liquid level at the tank filling port, and it is possible to prevent bubbles from being generated on the liquid level by mixing air into the discharged oil liquid as in the past, so the bubbles disappear. You don't have to wait until.

The invention according to claim 2 is the oil supply nozzle according to claim 1, characterized in that a nozzle lever detecting means for detecting that the nozzle lever is in the valve opening operation position is provided. It is a thing. Therefore, according to the second aspect, it is possible to prevent air from being mixed with the discharged oil liquid to generate bubbles on the liquid surface, and it is possible to detect that the nozzle lever is at the valve opening operation position after the end of refueling. , It can be confirmed that it has not returned to the valve closing operation position of the nozzle lever.

Further, the invention of claim 3 is characterized in that the tip is formed in a tapered shape so that the inside of the opening of the discharge pipe is expanded in diameter. Therefore, according to the third aspect, since the tip is formed in a tapered shape so that the inside of the opening of the discharge pipe is expanded, the oil liquid discharged from the inside of the opening of the discharge pipe is directed toward the inner wall of the oil supply port. It is possible to diffuse and suppress the generation of bubbles.

Further, the invention of claim 4 is provided in an oil supply nozzle having a discharge pipe extending from a nozzle main body to which an oil supply hose is connected, and a nozzle hook for hooking the oil supply nozzle. A nozzle switch for detecting the presence / absence, a pump for feeding an oil liquid to the refueling hose, and a movably provided at the tip of the discharge pipe, the tip of the discharge pipe is moved as the liquid level of the tank refueling port rises. A movable member that moves up by being blocked by oil liquid, a liquid level detection means that is provided in the discharge pipe and detects that the movable member has moved up, and the refueling nozzle is removed from the nozzle hook. When it is detected by the nozzle switch, the pump is started to feed the liquid to the refueling nozzle, and after the refueling is started, the pump is stopped by the detection signal from the liquid level detecting means. And a liquid control means is characterized in that the more.

Therefore, according to the fourth aspect, the pump is stopped when it is detected that the movable member provided at the tip of the discharge pipe has moved upward due to the rise of the liquid level at the tank oil supply port. It is possible to prevent air from being mixed with the discharged oil liquid to generate bubbles on the liquid surface, and it is possible to accurately detect the liquid surface of the oil supply port and perform full tank oil supply with high accuracy.

According to a fifth aspect of the present invention, there is provided an oil supply nozzle having a discharge pipe extending from a nozzle body to which an oil supply hose is connected, and a nozzle hook for hooking the oil supply nozzle. A nozzle switch for detecting the presence / absence, a pump for feeding an oil liquid to the refueling hose, and a movably provided at the tip of the discharge pipe, the tip of the discharge pipe is moved as the liquid level of the tank refueling port rises. A movable member that moves up when blocked by oil liquid, a liquid level detection means that is provided in the discharge pipe and detects that the movable member has moved up, and a nozzle lever of the refueling nozzle that opens the valve. When the nozzle switch detects that the nozzle lever detecting means detects that the refueling nozzle is in the position, and the nozzle switch detects that the refueling nozzle is disengaged from the nozzle hook, the pump is activated to start the refueling nozzle. Liquid feed control means for stopping the pump by a detection signal from the liquid level detection means after the start of refueling, and the nozzle when the detection signal from the nozzle lever detection means is turned on after the end of refueling. Determination means for determining that the lever has not returned to the valve closing operation position,
It is characterized by comprising.

Therefore, according to the fifth aspect, it is possible to prevent air from being mixed with the discharged oil liquid to generate bubbles on the liquid surface, and to accurately detect the liquid surface of the oil supply port to refuel the tank with a full tank. Can be performed accurately. Also, if the nozzle lever has not returned to the valve closing operation position after the end of refueling, this can be detected and notified, so it is possible to prevent the nozzle lever from being held at the valve opening operation position at the next refueling. It is possible to prevent the oil liquid from being discharged from the oil supply nozzle before the oil supply nozzle is inserted into the oil supply port.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a front view of a first embodiment of an oil supply apparatus according to the present invention, and FIG. 2 is a vertical sectional view of a first embodiment of the oil supply nozzle of the present invention.

The refueling device 1 is installed at a refueling site of a refueling station, and a refueling hose 5 connected to a refueling nozzle 3 is drawn out from the side surface of the device body 2. The refueling nozzle 3 is usually
It is hooked on a nozzle hook 4 provided on the side surface of the apparatus main body 2. For example, when a car of a customer arrives at a fueling station, an operator removes the fuel nozzle 3 from the nozzle hook 4 and a fuel filler port ( (Not shown) to refuel.

Reference numeral 5 is an oil supply hose, the base end of which is connected to the liquid supply conduit 7 through a joint 6 provided on the side surface of the apparatus main body 2,
The nozzle body 3 of the oil supply nozzle 3 has a tip through a rotary joint 8.
a. The liquid supply pipe line 7 extends to an underground tank (not shown), and a pump 9 and a flow meter 10 are arranged on the way.

The pump 9 has a refueling nozzle 3 and a nozzle hook 4
The signal from the nozzle switch 4a is removed from the controller 1
It is driven by the pump motor 12 which is activated by being input to 1, and pumps up the oil liquid in the underground tank (not shown). Reference numeral 13 is a refueling amount display, which displays a flow rate value based on the integrated value of the number of pulses output from the flow meter 10.

The controller 11 controls the pump 9 as described later.
It has a liquid feeding control means for controlling the liquid feeding from the fuel supply nozzle 3 to the fuel feeding nozzle 3. Further, the control device 11 starts the pump motor 12 when the nozzle switch 4a is turned on to feed the oil liquid to the oil supply nozzle 3, and stops the pump motor 12 when a full tank is detected, or If a preset amount of fuel is supplied before the start of refueling, the pump motor 1
Perform preset refueling control to stop No.2.

As shown in FIG. 2, the refueling nozzle 3 has a discharge pipe 16 which is communicated with the nozzle body 3a. At the tip of the discharge pipe 16, the outer diameter and the inner diameter of the discharge pipe 16 are expanded to form a trumpet shape. The taper part 16a formed in is provided. Further, inside the taper portion 16a, a liquid surface detection unit 17 for detecting the liquid surface of an oil supply port (not shown) into which the discharge pipe 16 is inserted is provided. The liquid level detector 17
Constitutes an essential part of the present invention, and the details will be described later.

Inside the oil passage 18 inside the nozzle body 3a, there is provided a valve mechanism 21 having a main valve 20 which comes into contact with or separates from the valve seat 19. The main valve 20 includes a seat portion 20a that abuts or separates from the valve seat 19, and a rod portion 20b that integrally extends the seat portion 20a.

The main valve 20 is biased by a coil spring 22 in the valve closing direction. Therefore, in the valve mechanism 21 when not refueling, the main valve 20 is in contact with the valve seat 19 by the pressing force of the coil spring 22 to close the valve. 24 is a nozzle lever,
One end side is supported in a state of being loosely fitted to the pin 25, and the operation end 24a provided at the other end on the free end side is rotatable in the C and D directions and is swingable in the lateral direction. The nozzle lever 24 grips the operating end 24a,
The L-shaped interlocking lever 26 pivotally attached to the nozzle body 3a rotates.

One end 26a of the interlocking lever 26 is in contact with the nozzle lever 24, and the other end 26b is the rod portion 20 of the main valve 20.
It is inserted into an engagement hole 20c provided in b and is rotatably supported by a shaft 26c. Therefore, interlocking lever 2
6 rotates in the clockwise direction to press the rod portion 20b of the main valve 20 in the valve opening direction. Therefore, when the operation end 24a of the nozzle lever 24 is rotated in the C direction, the main valve 20 is displaced in the valve opening direction and starts refueling.

27 is a lever guard, which is a nozzle lever 24
Is attached to the lower surface of the nozzle body 3a so as to surround the. The lever guard 27 includes a band frame portion 27a whose both ends are fixed to the nozzle body 3a, and a frame portion 27b which extends from the intermediate portion of the band frame portion 27a to the lower surface of the nozzle body 3a and is fixed. The frame portion 27b is provided with two locking portions 28 that hold the valve mechanism 21 in the open state by locking the nozzle lever 24 at a predetermined rotation position.

FIG. 3 is an enlarged vertical sectional view showing the liquid level detecting portion 17 provided at the tip of the discharge pipe 16. Since the tapered portion 16a provided at the tip of the discharge pipe 16 is formed in a trumpet shape, the discharge pipe 16 is closer to the discharge port.
Is formed to have a large inner diameter. Taper part 1
Inside the small diameter side of 6a, there is provided a throttle 31 projecting into the flow path. The diaphragm 31 has a triangular cross section, and has an upstream slope 31a and a downstream slope 31b. Further, the apex of the upstream slope 31a and the downstream slope 31b is the seat portion 31c of the diaphragm 31 with the minimum diameter.

Therefore, when the valve mechanism 21 is opened and the oil liquid flows into the discharge pipe 16, the upstream side slope 31 of the throttle 31.
Since the flow passage area is narrowed by a, the flow velocity increases.
Then, since the flow passage area is gradually expanded in the process of passing through the downstream side slope 31b of the throttle 31, the oil liquid is diffused in the discharge pipe 16 and the flow velocity is reduced.

Reference numeral 32 denotes a valve body for closing the oil liquid in the discharge pipe 16, which is slidably provided along a guide shaft 33 supported in the tapered portion 16a. This valve body 32
Is shaped like an umbrella and has a guide shaft 33
It is urged toward the diaphragm 31 side by a coil spring 34 wound around. The spring force of the coil spring 34 is set to be weaker than the discharge pressure of the oil liquid.

Therefore, in the valve body 32, when the oil liquid is not discharged, the taper portion 32a of the outer periphery is brought into contact with the seat portion 31c of the throttle 31 by the spring force of the coil spring 34, thereby closing the valve in the discharge pipe 16. When the valve mechanism 21 is opened by the opening operation of the nozzle lever 24, the valve opening operation is performed by the discharge pressure of the oil liquid, and the valve mechanism 21 is separated from the seat portion 31c of the throttle 31.

FIG. 4 is a view of the discharge pipe 16 seen from the discharge port side. The guide shaft 33 is supported by a shaft support member 37 fixed to a discharge port 36 of the discharge pipe 16. When viewed from the front of the discharge port 36, the shaft support member 37 includes a base 37a to which the guide shaft 33 is fixed, and arm portions 37b to 37d extending from the base 37a to the inner wall of the discharge pipe 16. Therefore, the oil liquid flowing through the discharge pipe 16 passes through the fan-shaped spaces 38a to 38c formed between the arm portions 37b of the shaft support member 37 and is discharged to the oil supply port.

A flange 33a is provided at the end of the guide shaft 33 to prevent the valve body 32 from falling off, and a ring-shaped spring receiver 39 against which a coil spring 34 abuts is provided at an intermediate portion of the guide shaft 33. It has been stopped. Further, a sensor plate (movable member) 40 is slidably fitted on the outer periphery of the guide shaft 33.

The sensor plate 40 has a disc-shaped pressure receiving portion 40a for receiving the pressure in the discharge pipe 16 and a guide portion 40b through which the guide shaft 33 is inserted. The sensor plate 40 moves to the downstream side (the discharge port 36 side) of the flow path of the discharge pipe 16 due to the discharge pressure of the oil liquid, and at the end of full tank refueling, the liquid level rises at the oil supply port as described later. It moves to the upstream side of the flow path along the guide shaft 33.

The guide shaft 33 is formed in a pipe shape having a hollow portion 33b, and a reed switch (liquid level detecting means) 41 is provided in the hollow portion 33b near the discharge port 36. This reed switch 41 has a lead wire 42
It is connected to the control device 11 via. Further, the lead wire 42 is inserted into a tube 43 mounted inside the discharge pipe 16 and is protected so as not to come into contact with oil liquid.

The sensor plate 40 is formed by insert molding a permanent magnet 44 into a synthetic resin material having oil resistance, and the permanent magnet 44 functions as a member to be detected. That is, the sensor plate 40 is located at a position close to the reed switch 41 during refueling, and is separated from the reed switch 41 when the sensor plate 40 moves upward due to the rise of the liquid level at the refueling port. Therefore, the reed switch 41 functions as a sensor for detecting the liquid level at the time of full refueling, and is closed (on state) by the magnetic field of the permanent magnet 44 during refueling, and the liquid level at the oil filling port is When the permanent magnet 44 is separated due to the ascent, it is opened (OFF state) and it is detected that refueling is completed. Therefore, the control device 11 determines that the reed switch 41 is full when the reed switch 41 is switched from on to off.

As described above, since the liquid level detecting section 17 detects the liquid level based on the output signal from the reed switch 41 according to the displacement position of the sensor plate 40 and determines that the liquid level is full, the conventional method is used. It is possible to detect the liquid surface without generating bubbles on the liquid surface without mixing air with the oil liquid unlike the one using the automatic valve closing mechanism having the negative pressure generating portion.

Therefore, the liquid level detector 17 is composed of the sensor plate 40 and the reed switch 41. The sensor plate 40 is slidably provided between the shaft support member 37 and the spring receiver 39, and the shaft support member 37 prevents the sensor plate 40 from falling off the discharge port 36 of the discharge pipe 16.

FIG. 5 shows the liquid level detector 17 and the valve body 3 during refueling.
It is a longitudinal cross-sectional view showing the operation of FIG. Main valve 2 of refueling nozzle 3
When 0 is operated in the valve opening direction and the oil liquid is discharged, the valve body 32 provided in the discharge pipe 16 is opened by the discharge pressure so that the oil liquid flows between the throttle 31 and the valve body 32. To the discharge port 36 side of the discharge pipe 16. Discharge pipe 1
At the discharge port 36 of No. 6, the sensor plate 40 is pressed by the discharge pressure and is in contact with the shaft support member 37.
The oil is discharged to the oil supply port 45 through an annular space formed between the inner circumference and the inner circumference.

Moreover, since the tip of the discharge pipe 16 is the tapered portion 16a, the oil liquid discharged from the discharge port 36 is sprayed toward the inner wall of the discharge pipe 16 so as to be diffused. Therefore, the oil liquid discharged from the discharge pipe 16 flows through the inner wall of the fuel filler port 45 into the fuel tank. As a result, the flow velocity of the supplied oil liquid colliding with the liquid surface in the fuel tank is reduced, and bubbles are less likely to be generated on the liquid surface.

Therefore, even if the flow rate of the oil liquid is made higher than in the conventional case, the bubbles are less likely to be generated on the liquid surface even if the oil is supplied at a high speed, and further, the detection of the liquid surface is not delayed due to the generation of the bubbles. It is possible to shorten the time until it is done. FIG. 6 is a vertical cross-sectional view showing the state at the end of full tank refueling.

When the liquid surface 45a of the oil supply port 45 rises and the oil liquid reaches the position of the throttle 31 in the discharge pipe 16, the flow passage area is narrowed by the throttle 31.
Negative pressure is generated within 6. Due to the negative pressure, the sensor plate 40 is sucked upward and the reed switch 41
Separate from. The reed switch 41 is the sensor plate 4
When it moves up by 0, it opens and switches to the off state, and outputs a liquid level detection signal to the control device 11.

As described above, in the liquid level detecting section 17, the reed switch 41 can detect the liquid level 45a of the oil supply port 45 by outputting a signal corresponding to the position of the sensor plate 40. Since the air is not mixed in the oil liquid for detecting the liquid surface, it is possible to suppress the generation of bubbles on the liquid surface 45a. Therefore, erroneous detection due to generation of bubbles is reduced, more accurate liquid level detection can be performed, and it is not necessary to wait until the bubbles disappear, so that refueling time can be shortened.

Here, the full tank refueling process executed by the control device 11 in connection with the refueling work in the refueling device 1 having the above-mentioned configuration will be described with reference to FIG. When the vehicle for refueling arrives in front of the refueling device 1, the worker at the refueling station removes the refueling nozzle 3 from the nozzle hook 4 and inserts the discharge pipe 16 into the refueling port 45 of the fuel tank. Then, the nozzle lever 24 of the refueling nozzle 3 is rotated in the C direction so that the operating end 24 a of the nozzle lever 24 is locked to the locking portion 28 of the lever guard 27. With this, the refueling nozzle 3
The main valve 20 is held at the open position.

When the refueling nozzle 3 is removed from the nozzle hook 4 and the nozzle switch 4a is turned on in step S1 (hereinafter "step" will be omitted), the control device 11 switches to the on state.
In S2, whether or not the reed switch 41 as a liquid level sensor is turned on in order to determine whether or not the discharge pipe 16 is inserted into the fuel filler port 45, that is, whether or not the sensor plate 40 is moving downward. To judge.

If the reed switch 41 is on, it means that the sensor plate 40 has moved downward to a position facing the reed switch 41, so that it is assumed that the discharge pipe 16 has been inserted into the oil supply port 45, and the process proceeds to S3 to pump the pump. The motor 12 is activated to pump up the oil liquid in the underground tank by the pump 9 to refuel the fuel tank of the vehicle through the refueling nozzle 3.

In the next step S4, it is determined whether or not the reed switch 41 is off. When the oil liquid is supplied to the fuel tank from the oil supply nozzle 3 and the liquid surface 45a rises to the oil supply port 45, the oil liquid that has been supplied eventually becomes the throttle 3 in the discharge pipe 16.
Reach position 1. Since the flow passage area in the discharge pipe 16 is narrowed by the throttle 31, a negative pressure is generated in the discharge pipe 16 and the sensor plate 40 is sucked upward. Therefore, the reed switch 41 is opened by the separation of the sensor plate 40 and switched to the off state, and outputs the liquid level detection signal to the control device 11.

When the reed switch 41 is turned off in this way, it is judged that the liquid level has been detected, that is, the tank is full, and the routine proceeds to S5, where the pump motor 12
To stop the liquid feeding by the pump 9. And
In the next S6, it is determined whether or not the nozzle switch 4a is in the off state, and when the refueling nozzle 3 is returned to the nozzle hook 4 and the nozzle switch 4a is switched to the off state, a series of full tank refueling processing ends. .

FIG. 8 shows an example of dimensions of the taper portion 16a of the discharge pipe 16 and the liquid level detection portion 17 provided in the taper portion 16a. As a result of an experiment using a device configured to have this size, it was confirmed by an experiment that the liquid level 45a of the oil supply port 45 rises and a negative pressure is generated so that the sensor plate 40 smoothly moves to the upstream side of the flow path. Has been done.

FIG. 9 is a vertical sectional view of an oil supply nozzle according to the second embodiment of the present invention. The fueling nozzle 51 is of a pistol type, has a discharge pipe 53 communicating with the nozzle body 52, and a taper portion 53a having a trumpet-shaped diameter is provided at the tip of the discharge pipe 53. Then, the tapered portion 53
Inside a, a liquid level detection unit 54 for detecting the liquid level of the oil supply port (not shown) into which the discharge pipe 53 is inserted is provided. Since the liquid level detection unit 54 has the same configuration as the liquid level detection unit 17 described above, detailed description thereof will be omitted.

The nozzle body 52 has a grip portion 55,
The valve mechanism 56, the nozzle lever 57, and the nozzle lever 57
A link mechanism 58 for transmitting the turning operation of the valve mechanism 56 to the valve mechanism 56,
A locking member 59 for locking the nozzle lever 57, a solenoid 60 for unlocking the locking member 59, and a reed switch 61 as a lever detection sensor for detecting that the nozzle lever 57 is in the valve opening operation position. Is provided.

The valve mechanism 56 includes a valve seat 62 and a main valve 64 that abuts the valve seat 62 and shuts off the flow passage 63 in the nozzle body 52.
And a coil spring 65 for urging the main valve 64 in the valve closing direction. Further, the main valve 64 is composed of a seat portion 64a which is seated on and off the valve seat 62, and a rod 64b which is inserted into the guide hole 66 of the nozzle body 52 and guided in the sliding direction.
A lip seal 67 is provided in the guide hole 66 to seal the gap with the rod 64b.

The nozzle lever 57 is rotatably supported by a shaft 68 fixed to the nozzle main body 52, and has a fan-shaped lever main body 57a, and a shaft provided on the lever main body 57a and extending in the F direction in the drawing. And a cam portion 57b formed so that the radius from 68 is small.
A trigger-shaped lever 57c extending below b, a locking recess 57d provided on the back side of the lever 57c and locked by a locking member 59, and a permanent magnet 57e embedded in the side surface of the lever body 57a. Have. The lever 57c is formed in a curved shape in an arc shape so that it can be easily operated, and extends so as to rotate inside the lever guard 73.

The link mechanism 58 has a nozzle lever 5 at one end.
7 is provided with a roller 69a that is in sliding contact with the cam portion 57b,
The first link 69, the other end of which is supported by the shaft 69b, and the shaft 7
A second link 70 connected to the first link 69 by the shaft 0a, and a third link 70 having one end connected to the second link 70 by the shaft 71a and the other end connected to the rod 64b of the main valve 64 by the shaft 71b. And a link 71 of.
In addition, the third link 71 is the guide surface 5 of the nozzle body 52.
It has a roller 71c which rolls 2a.

The locking member 59 is formed in an L shape,
It is rotatably supported by a shaft 72 fixed to the nozzle body 52. The locking member 59 is provided with a locking projection 59a that engages with the locking recess 57d of the nozzle lever 57 at one end and a pressing portion 59b that is pressed by the plunger 60a of the solenoid 60 at the other end. There is. Further, the locking member 59 is biased in the clockwise direction (locking direction) by the torsion spring 74.

The reed switch 61 has a nozzle lever 57.
Is provided at a position close to the permanent magnet 57e embedded in the side surface of the lever body 57a when the valve is opened in the E direction. Therefore, the reed switch 61 is opened (OFF state) when the nozzle lever 57 is in the valve closed position, and is a permanent magnet 57e when the nozzle lever 57 is operated to open.
A lever detection signal is output to the control device 11 in order to close (ON state) close to.

FIG. 10 is a vertical sectional view showing the oil supply nozzle 51 in the valve opening operation state. Nozzle lever 5 of refueling nozzle 51
When 7 is operated in the valve opening direction, the roller 69a of the link mechanism 58 makes sliding contact with the cam portion 57b of the nozzle lever 57, so that the first link 69 is displaced upward. With this,
The second link 70 pushes the third link 71 backward,
The main valve 64 is slid in the valve opening direction against the coil spring 65. As a result, the seat portion 64a of the main valve 64 is separated from the valve seat 62 to be in the valve open state, and the oil liquid is discharged to the discharge pipe 53.

The permanent magnet 57e embedded in the nozzle lever 57 is close to the reed switch 61. Therefore, the reed switch 61 is closed and outputs the lever detection signal. Therefore, when the nozzle lever 57 has not returned to the valve closed position after the pump 9 is stopped due to the completion of full tank refueling, this can be immediately detected to notify the operator. Therefore, the refueling nozzle 3 can be prevented from being returned to the nozzle hook 4 in the valve open state, and the pump 9 can be prevented from being started in the state where the refueling nozzle 3 is opened at the next refueling.

When the liquid level detecting portion 54 detects the liquid level at the oil supply port, the control device 11 determines that the full tank oil supply is completed and energizes the solenoid 60. When the solenoid 60 is excited, the plunger 60a is locked by the locking member 59.
The pressing portion 59b is pressed to release the locking of the nozzle lever 57. As a result, the nozzle lever 57 is rotated in the F direction by the action of the coil spring 65 to return the main valve 64 to the closed position.

FIG. 11 is a block diagram showing the structure of the electric system path. The reed switch 61 is connected in series with the reed switch 41 of the liquid level detector 54. for that reason,
The control device 11 determines that refueling is possible when both the reed switches 61 and 41 are on, and determines that refueling is prohibited when either one of the reed switches 61 or 41 is off.

Here, the oil supply nozzle 51 of the second embodiment described above.
A process executed by the control device 11 when refueling the tank with a full tank will be described with reference to the flowcharts of FIGS. 12 and 13. When the vehicle for refueling arrives in front of the refueling device 1, the worker at the refueling station removes the refueling nozzle 51 from the nozzle hook 4 and inserts the discharge pipe 53 into the refueling port of the fuel tank. Then, the nozzle lever 57 of the refueling nozzle 51
Is rotated in the E direction to operate the lever 57 of the nozzle lever 57.
locking member 59 that engages with the locking recess 57d provided in c
The engaging convex portion 59a is engaged to lock the nozzle lever 57 at the valve opening operation position. With this, the seat portion 64a of the main valve 64 separates from the valve seat 62 and the fueling nozzle 51 is opened and held at the valve opening position.

In step S11, the control unit 11 removes the oil supply nozzle 51 from the nozzle hook 4 and the nozzle switch 4a.
When is turned on, the process proceeds to S12, where the nozzle lever 5
It is determined whether or not 7 is in the valve opening operation position. That is,
When the reed switch 61 as the lever detection sensor is on, it is determined that the nozzle lever 57 is in the valve opening operation position, the process proceeds to S13, and it is determined whether or not the discharge pipe 16 is inserted into the fuel filler port 45, that is, In order to determine whether or not the sensor plate 40 is moving downward, it is determined whether or not the reed switch 41 as a liquid level sensor is on.

If the reed switch 41 is on, it means that the sensor plate 40 has moved downward to the position facing the reed switch 41, so that the discharge pipe 16 has been inserted into the oil supply port 45, the process proceeds to S14, and the pump Motor 12
The pump 9 pumps up the oil liquid in the underground tank and refuels the fuel tank of the vehicle through the refueling nozzle 3.

In the next step S15, it is determined whether or not the reed switch 41 is off. When the oil liquid is supplied from the oil supply nozzle 51 to the fuel tank and the liquid surface 45 a rises to the oil supply port 45, the oil supply oil is supplied to the throttle 31 in the discharge pipe 53.
To the position of. Since the flow passage area in the discharge pipe 53 is narrowed by the throttle 31, a negative pressure is generated in the discharge pipe 53 and the sensor plate 40 is sucked upward. Therefore, the reed switch 41 is connected to the sensor plate 4
When it is separated by 0, it is opened and switched to the off state, and a full tank detection signal is output to the control device 11.

When the reed switch 41 is switched to the off state in this way, it is determined that the full tank is detected, and the process proceeds to S16 to excite the solenoid 60. When the solenoid 60 is excited, it drives the plunger 60a to press the pressing portion 59b of the locking member 59 to release the locking of the nozzle lever 57 by the locking member 59. Therefore, the nozzle lever 57 rotates in the F direction and the main valve 64 returns to the valve closed position.

In the next step S17, it is determined whether or not the reed switch 61 as the lever detection sensor is off.
When the reed switch 61 is off, the process proceeds to S18, and "Complete tank refueling end" is displayed. As a result, the next time fueling is performed, the fueling nozzle 3 is always closed, and the fueling nozzle 3 is not returned to the nozzle hook 4 while the fueling nozzle 3 remains open.

At the next step S19, it is determined whether or not the nozzle switch 4a is in the off state. When the refueling nozzle 3 is returned to the nozzle hook 4 and the nozzle switch 4a is switched to the off state, the process proceeds to the next step S20. The pump motor 12 is stopped to stop the liquid feeding by the pump 9. Then, in S21, the display of "end of full tank refueling" is turned off. This completes a series of full tank refueling processing.

Further, in S17, when the reed switch 61 is turned on, the solenoid 60 is excited to release the locking of the nozzle lever 57 by the locking member 59, but the locking member 59 is released. If the lock release operation is not performed or the nozzle lever 57 does not return to the valve closing position, the process proceeds to S22 of FIG. 13, the pump motor 12 is stopped, and the liquid feeding by the pump 9 is stopped. And S
Proceed to step 23 and display "End of full tank refueling".

At the next step S24, it is determined whether or not the nozzle switch 4a is in the off state. When the refueling nozzle 3 is returned to the nozzle hook 4 and the nozzle switch 4a is switched to the off state, the process proceeds to step S25 and the "full" state is reached. Turn off the "Tan refueling completed" display. In the next step S26, the number of unlocking operations of the solenoid 60 is counted. If it is within n times (predetermined number of times), the process proceeds to step S27 to excite the solenoid 60. Excitation of solenoid 60 causes plunger 60a
Presses the pressing portion 59b of the locking member 59 in the locking release direction.

Then, in S28, it is again determined whether or not the reed switch 61 as the lever detection sensor is off. When the reed switch 61 is off, it is determined that the nozzle lever 57 has returned to the valve closing position, and the series of full tank refueling processing ends. However, in S28, when the reed switch 61 is on, the process returns to S26,
The processing of S26 to S28 is repeated. When the number of unlocking operations of the solenoid 60 exceeds n times in S26, the process proceeds to S29 in order to notify the failure of the refueling nozzle 51 and "abnormality occurrence" is displayed to inform the operator of the refueling nozzle 51. Let me know.

As described above, when the nozzle lever 57 remains in the valve opening operation position after the solenoid 60 is excited, the excitation of the solenoid 60 is repeated until the nozzle lever 57 returns to the valve closing operation position. And secure the locking member 5
The locking of the nozzle lever 57 by 9 can be released.

In the above embodiment, the liquid level detection and the valve opening operation of the nozzle lever are detected by the reed switch. However, the invention is not limited to this, and a sensor such as an ultrasonic sensor or an optical sensor may be used. Also, the same effect as in the above embodiment can be obtained. Further, in the above embodiment, the discharge pipe 1
The taper portion at the tip of 6 has a structure in which both the outer diameter and the inner diameter are expanded, but the invention is not limited to this, and only the inner diameter may be expanded.

[0072]

As described above, according to the first aspect, the liquid level can be detected by detecting that the movable member provided at the tip of the discharge pipe has moved upward due to the rise of the liquid level at the tank filler port. Bubbles are less likely to be generated on the liquid surface, and the liquid surface of the tank filling port can be accurately detected, and it is possible to prevent bubbles from being generated on the liquid surface by mixing air into the discharged oil liquid as in the conventional case. You don't have to wait for the bubbles to disappear.

Further, according to the second aspect, it is possible to prevent air from being mixed with the discharged oil liquid to generate bubbles on the liquid surface, and to prevent the nozzle lever from being in the valve opening operation position after the end of refueling. Since it can be detected, it can be confirmed that it has not returned to the valve closing operation position of the nozzle lever.

Further, according to the third aspect, since the tip is formed in a tapered shape so that the inside of the opening of the discharge pipe is expanded, the oil liquid discharged from the inside of the opening of the discharge pipe is filled with the inner wall of the oil supply port. It is possible to suppress the generation of bubbles by being diffused toward. Further, according to claim 4, when it is detected that the movable member provided at the tip of the discharge pipe has moved upward due to the rise in the liquid level of the tank oil supply port, the pump is stopped, so that the discharge is performed as in the conventional case. It is possible to prevent air from being mixed with the oil liquid to generate bubbles on the liquid surface, and it is possible to accurately detect the liquid surface of the oil supply port to perform full tank oil supply with high accuracy.

Further, according to the fifth aspect, it is possible to prevent air from being mixed into the discharged oil liquid to generate bubbles on the liquid surface, and to accurately detect the liquid surface of the oil supply port to supply full oil. Can be performed accurately. Also, if the nozzle lever has not returned to the valve closing operation position after the end of refueling, this can be detected and notified, so it is possible to prevent the nozzle lever from being held at the valve opening operation position at the next refueling. ,
It is possible to prevent the oil liquid from being discharged from the oil supply nozzle before the oil supply nozzle is inserted into the oil supply port.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of one embodiment of a fueling device according to the present invention.

FIG. 2 is a vertical cross-sectional view showing the internal structure of the first embodiment of the fueling nozzle.

FIG. 3 is a transverse cross-sectional view showing a liquid level detection unit provided at the tip of the discharge pipe of the oil supply nozzle.

FIG. 4 is a view seen from the opening side of the tip of the discharge pipe.

FIG. 5 is a vertical cross-sectional view showing the flow of oil liquid discharged from the tip of the discharge pipe.

FIG. 6 is a vertical cross-sectional view showing the operation of the liquid level detection unit when the liquid level rises at the filler port.

FIG. 7 is a flowchart of a process executed by the control device when the tank is fully refueled.

FIG. 8 is a vertical cross-sectional view showing an example of dimensions of the tip shape of the discharge pipe.

FIG. 9 is a vertical cross-sectional view of a second embodiment of the oil supply nozzle.

FIG. 10 is a vertical cross-sectional view showing a refueling operation of the second embodiment.

FIG. 11 is a circuit diagram in which a reed switch for liquid level detection and nozzle lever detection is connected.

FIG. 12 is a flowchart of a process executed by the control device according to the second embodiment when the tank is filled with oil.

FIG. 13 is a flowchart of a process executed by the control device subsequent to the process of FIG.

[Explanation of symbols]

 1 Lubrication device 2 Device main body 3 Lubrication nozzle 4 Nozzle hook 5 Lubrication hose 7 Liquid supply conduit 9 Pump 10 Flow meter 11 Control device 12 Pump motor 13 Lubrication amount indicator 16 Discharge pipe 17 Liquid level detector 19 Valve seat 20 Main valve 21 valve mechanism 24 nozzle lever 26 interlocking lever 27 lever guard 32 valve body 33 shaft 36 discharge port 37 shaft support member 40 sensor plate 41 reed switch 44 permanent magnet 51 refueling nozzle 57 nozzle lever 58 link mechanism 60 solenoid 61 reed switch 64 main valve

Claims (5)

[Claims] 1. A nozzle main body to which an oil supply hose is connected, a discharge pipe which extends from the nozzle main body and is inserted into a tank oil supply port to discharge oil liquid, and a nozzle lever provided in the nozzle main body. A valve mechanism that opens by a turning operation and a movably provided at the tip of the discharge pipe, and moves upward by closing the tip of the discharge pipe with oil liquid as the liquid level of the tank oil supply port rises. And a liquid level detecting means for detecting that the movable member has moved upward. 2. The fueling nozzle according to claim 1, further comprising nozzle lever detecting means for detecting that the nozzle lever is in a valve opening operation position. 3. The oil supply nozzle according to claim 1, wherein the discharge pipe has a tapered tip so that the inside of the opening is expanded in diameter. 4. A refueling nozzle having a discharge pipe extending from a nozzle body to which a refueling hose is connected, and a nozzle switch provided on a nozzle hook for hooking the refueling nozzle and detecting the presence or absence of the refueling nozzle. A pump for feeding an oil liquid to the refueling hose, and a movably provided at the tip of the discharge pipe, and the tip of the discharge pipe is blocked by the oil liquid as the liquid level of the tank filler port rises. A movable member that moves upward by means of a liquid level detection means that is provided in the discharge pipe and that detects that the movable member has moved upward, and that the nozzle switch detects that the refueling nozzle has been removed from the nozzle hook. Then, the pump is started to feed the liquid to the refueling nozzle, and after the refueling is started, the liquid feed control means for stopping the pump according to a detection signal from the liquid level detection means, An oil supply device characterized in that 5. A refueling nozzle having a discharge pipe extending from a nozzle body to which a refueling hose is connected, and a nozzle switch provided on a nozzle hook for hooking the refueling nozzle and detecting the presence or absence of the refueling nozzle. A pump for feeding an oil liquid to the refueling hose, and a movably provided at the tip of the discharge pipe, and the tip of the discharge pipe is blocked by the oil liquid as the liquid level of the tank filler port rises. A movable member that moves upward by means of a liquid level detection means that is provided in the discharge pipe and that detects that the movable member has moved upward, and that the nozzle lever of the refueling nozzle is in the valve opening operation position. Nozzle lever detection means and when the nozzle switch detects that the refueling nozzle has been disengaged from the nozzle hook, the pump is activated to feed the liquid to the refueling nozzle to open the refueling nozzle. After the start, the liquid feed control means for stopping the pump according to the detection signal from the liquid level detection means, and after the end of refueling, when the detection signal from the nozzle lever detection means is ON, the nozzle lever is in the valve closing operation position. A refueling device comprising: a determination unit that determines that the fuel is not recovered.