JPH0648498A - Fuel oil feeding nozzle - Google Patents

Abstract

PURPOSE:To suck vapor and air in fuel tank through a single suction passage only and shorten a fuel oil feeding time by utilizing a change-over mechanism, permitting the suction passage to communicate to a vapor passage before feeding fuel oil, and permitting the suction passage to communicate to a negative pressure passage after feeding fuel oil. CONSTITUTION:The fuel oil feeding nozzle sucks vapor and air in a fuel tank through a suction pipe 40 in an outlet nozzle 26. A valve body 35 is deviated in a plurality of contrary directions A, B to change over a plurality of ports 43, 44. That is, before feeding fuel oil, the vapor is supplied to a kind-of-oil sensor through a vapor suction pipe 16. On the other hand, after feeding fuel oil, the vapor and air are introduced into a negative pressure chamber 66 in accordance as an air introducing hole provided at a top end of the outlet nozzle 26 is closed at an oil level by the valve opening operation of the valve body 35. As a result, a diaphragm 61 is deviated in a direction in which a valve stem 54 is liberated from a locked condition to permit a valve mechanism 32 to carry out the valve opening operation. By such means, vapor and air are supplied to a kind-of-oil identifying device and an automatic valve opening mechanism through the single suction pipe 40 only.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fueling nozzle, and more particularly to an oiling nozzle configured to feed vapor and air in a tank to an automatic valve closing mechanism and oil type discriminating means.

[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.

[0003] When a discharge pipe is inserted into a tank oil filler port of an automobile and a nozzle lever is rotated,
The main valve in the nozzle body opens to discharge the oil liquid pumped by the pump from the discharge pipe 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 at the tip of a discharge pipe, a negative pressure generating means utilizing a Venturi effect when an oil liquid flows by opening a main valve, and a diaphragm opening are used. A structure is known in which a main valve in a valve state is forcibly closed and displaced. In this mechanism, when the liquid level in the tank rises due to the progress of refueling and the air introduction hole is closed, the negative pressure generated by the negative pressure generating means is not compensated and the diaphragm is displaced by the negative pressure of this negative pressure generating means. Then, the main valve is closed.

[0005] In addition, a fueling device installed at a gas station,
There are multiple oil supply nozzles for each type of oil supply, mainly for gasoline supply and light oil supply. Workers at the gas station select the type of oil suitable for the customer's car engine. Perform refueling work.

However, in this type of fueling device, when fueling a tank of a customer's car, for example, the location where gasoline should be supplied may be erroneously used by using a fueling nozzle for supplying light oil. . In order to prevent such a different oil type oil supply accident, the oil supply device tends to be provided with an oil type determination means. Then, the oil supply device provided with this oil type determination means sucks the vapor of the residual oil liquid in the tank for refueling from the vapor suction port provided in the discharge pipe of the oil supply nozzle, and the oil vapor sensor as the oil type determination means. The oil type is discriminated against the oil, and the oil can be supplied only when the oil type of the residual oil liquid in the tank and the oil type of the oil liquid supplied from the oil supply device match.

Therefore, in the refueling nozzle having the automatic valve closing mechanism and the oil type discriminating means, the air introducing hole for detecting the liquid level accompanying the rise of the liquid level in the tank due to the progress of refueling, the negative pressure generating means and the diaphragm are defined. Inside the discharge pipe, there is an air introduction pipe line for communicating with the negative pressure chamber that has been formed, and a vapor suction pipe line for feeding the vapor in the tank from the vapor suction port to the oil vapor sensor of the oil type determination means. Has been inserted into.

[0008]

In the conventional oil supply nozzle having the automatic valve closing mechanism and the oil type discriminating means, the two pipe lines are inserted into the inside of the discharge pipe. There is a problem that the flow passage is narrowed, the resistance of the divided oil liquid flowing in the discharge pipe increases, and the flow rate at the time of refueling is reduced. Therefore, in the conventional refueling nozzle, the refueling time becomes long, and especially when a vehicle having a large tank is fully refueled, the waiting time of the customer is extended and the customer is annoyed.

Further, although a small-diameter thin tube is used for the air introducing line and the vapor suction line, it is difficult to process the thin tube and it takes a lot of time and labor. Further, when the discharge pipe of the fueling nozzle becomes heavy and a relatively weak woman, for example, performs fueling work, there is a problem that it becomes heavy labor and a great amount of labor is required for the fueling operation.

Therefore, an object of the present invention is to provide an oil supply nozzle that solves the above problems.

[0011]

The present invention is directed to a discharge pipe extending from a nozzle body and inserted into a tank oil supply port, and a suction pipe formed along the discharge pipe for sucking vapor and air in the tank. A passage, and a valve mechanism which is provided in the nozzle body and opens by rotating the nozzle lever,
After the valve mechanism is opened, a negative pressure generating portion that generates a negative pressure by discharging the oil liquid and a negative pressure generating portion when the suction passage is closed due to a rise in the liquid level in the tank during liquid supply An automatic valve closing mechanism that closes the valve mechanism by pressure, and a negative pressure passage that connects the automatic valve closing mechanism and the negative pressure generating section,
A vapor passage for feeding the vapor in the tank to an oil type discriminating means for discriminating the oil type based on the vapor in the tank in which the discharge pipe is inserted, and a communication between the suction passage and the vapor passage before the start of refueling. However, after the refueling is started, a switching mechanism that switches the suction passage and the negative pressure passage so as to communicate with each other is provided.

[0012]

With the switching mechanism, the passage can be switched so that the suction passage and the vapor passage are communicated with each other before the start of refueling, and the suction passage and the negative pressure passage are communicated with each other after the refueling is started. Only one suction passage for sucking the vapor and air in the fuel tank is provided inside, and the automatic valve closing mechanism or the oil type discriminating device is used for the vapor in the fuel tank without narrowing the flow passage in the discharge pipe. And air can be supplied.

[0013]

1 to 3 show an embodiment of an oil supply device and an oil supply nozzle according to the present invention.

In each of the drawings, 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 a side surface of the device body 2. The refueling nozzle 3 is usually 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 refueling nozzle 3 from the nozzle hook 4 and the car The fuel tank 6 is inserted into the fuel filler port 6a to perform fueling.

The refueling hose 5 is connected to the piping 7 of the refueling system in the apparatus body 2. The pipe 7 is connected to an underground tank (not shown), and a flow meter 10 and a pump 9 are arranged in the middle of the pipe 7.

Reference numeral 12 is a control device, and when the refueling nozzle 3 is inserted into the refueling port 6a and the nozzle switch 11 provided on the nozzle hook 4 is turned on, oil vapor (vapor) will be described later.
Based on the oil type. Then, when the detected oil type of the fuel tank 6 matches the oil type corresponding to the preset underground tank, the control device 12 starts the pump motor 13 and drives the pump 9. By driving the pump 9, the oil liquid in the underground tank (not shown) is pumped up through the pipe 7 and passes through the flow meter 10 and the refueling hose 5, and the refueling nozzle 3
The fuel tank 6 is refueled.

During refueling, the flow meter 10 measures the amount of refueling, and the flow rate pulse transmitter 10a controls the flow rate pulse by the controller 1.
Output to 2. Then, the control device 12 integrates the flow rate pulses and displays the amount of refueling on the refueling amount indicator 14.

Reference numeral 16 denotes a vapor suction pipe having flexibility, one end of which is connected to the oil supply nozzle 3 and which is integrally held along the oil supply hose 5, for example, on the outer circumference of the oil supply hose 5, and the other end of which is the main body of the apparatus. It is connected to the oil type judgment and recovery system in 2. Therefore, when the fuel filler nozzle 3 is inserted into the fuel filler port 6a, the vapor in the fuel tank 6 flows into the vapor suction pipe 16.

Reference numeral 17 is an oil type detection sensor (oil type discrimination means)
Then, the oil type is detected from the oil vapor pressure sucked through the vapor suction pipe 16. As the oil type detection sensor 17, for example, a semiconductor type gas sensor that detects the vapor pressure of vapor is used. The saturated vapor pressure differs depending on the type of oil (gasoline, light oil in this embodiment) of the liquid remaining in the fuel tank 6, and gasoline has a higher saturated vapor pressure than light oil. Therefore, the output of the sensor 17 becomes high when the vapor of gasoline is sucked, and the output of the sensor 17 becomes low when the vapor of light oil is sucked.

Reference numeral 18 denotes an intake / exhaust pump, which is connected to the downstream side of the sensor 17 via a pipe 20. The suction / exhaust pump 18 is driven so as to suck the vapor in the fuel tank 6 at the time of detecting the type of oil, as will be described later, and after the refueling is completed, the air / vapor in the vapor suction pipe 16 is exhausted to the refueling nozzle 3 side. Driven. The intake / exhaust pump 18 is provided with an intake / exhaust port 18a. When the oil type is detected, the sucked vapor is exhausted from the intake / exhaust port 18a, and after the refueling is completed, the outside air is sucked from the intake / exhaust port 18a to remove the vapor. The inside of the suction pipe 16 is purged.

As shown in FIG. 3, the oil supply nozzle 3 is attached to the tip of the hose 5 via rotary joints 21 to 23 having a swivel pipe joint structure. That is, the hose 5 is provided with a rotary joint 21 connected to the tip, a rotary joint 22 as an elbow for changing the connecting direction to a right angle direction, and a rotary joint 23 rotatably connected to the rotary joint 22. It is connected to the side surface of the fueling nozzle 3.

Reference numeral 24 denotes a nozzle main body of the oil supply nozzle 3, and as shown in FIGS. 3 and 5, a pipe connecting member for connecting a valve seat member 25 of the main valve and a discharge pipe 26, which will be described later, in the front end side opening 24c. 27 is inserted and both members are held by tightening to the nut 28, and the oil passage 20 and the oil flow path 2 formed in the valve seat member 25 and the pipe connecting member 27.
Inside 0, a negative pressure generating unit 29 and a valve mechanism 32 including a main valve body 30 and a sub valve body 31 are provided.

The negative pressure generating portion 29 is provided inside the valve seat member 25, and a passage 33 that opens to the tapered inner wall of the oil passage 20 and a passage 33 that is separated from the tapered inner wall when refueling is opened. The valve body 35 is configured to contact the tapered inner wall by the pressing force of the coil spring 34 when the fuel supply is stopped and close the opening portion of the passage 33.

The valve body 35 is in contact with the tapered inner wall to close the oil passage 20.
The valve shaft 37 is inserted into a central hole 38 that extends further downstream and is bored in the pipe connecting member 27. A suction pipe (suction passage) 40 communicating with an air introduction hole 39 provided at the tip of the discharge pipe 26 described later is connected to the opening 38a on the downstream side of the central hole 38 formed in the pipe connecting member 27. Has been done.

The valve element 35 slides the valve shaft 37 inserted in the central hole 38 in the A and B directions in accordance with the opening and closing operation of the main valve element 30 to open and close the passage 33 of the negative pressure generating portion 29. As a result, the negative pressure generation is switched and the fuel tank 6 introduced into the central hole 38 of the pipe connecting member 27 from the suction pipe 40.
It functions as a switching mechanism that switches the outflow direction of vapor and air inside. Therefore, the suction pipe 40 provided in the discharge pipe 26 can serve both for oil type determination and liquid level detection, and the flow passage area in the discharge pipe 26 is not narrowed to reduce the resistance at the time of oil discharge. In addition, the refueling time can be reduced.

Therefore, the vapor and the air in the fuel tank 6 can be supplied to the automatic valve closing mechanism or the oil type discriminating means without narrowing the flow passage in the discharge pipe 26, so that the divided oil liquid is the discharge pipe. The flow resistance during refueling can be ensured by reducing the resistance when flowing in 26, and the refueling time can be shortened compared to the conventional refueling nozzle. Even if a car with a large fuel tank is refueled, the customer's waiting time Can be shortened.

A small-diameter thin tube is used as the suction pipe 40 in the discharge pipe 26, but the number can be reduced to one, which facilitates processing, and further, the discharge pipe 2 of the oil supply nozzle 3 can be processed.
Since the inside of 6 can be lightened, the labor of refueling operation can be reduced even when a relatively weak woman or the like performs refueling work.

As shown in FIG. 6, a passage 42 communicating with the central hole 38 of the pipe connecting member 27 is bored at the end of the valve shaft 37 of the valve body 35, and the passage 42 extends in the radial direction. The first port 43 and the second port 44 that communicate with each other communicate with each other. The first port 43 and the second port 44 communicate with the grooves 45 and 46 formed on the outer circumference of the valve shaft 37, respectively, so that the switching operation can be performed even if the valve body 35 rotates. There is.

When the valve body 35 is displaced in the B direction, the first port 43 communicates with a passage (vapor passage) 47 for discriminating the oil type formed in the pipe connecting member 27, and when displaced in the A direction, the first port 43 is communicated with the passage 47. The second port 44 communicates with a liquid level detecting passage (negative pressure passage) 48 formed in the pipe connecting member 27, and selectively transfers the vapor and air sucked from the air introduction hole 39 to the passage 4
7 or 48.

When refueling is started by the valve opening operation of the valve mechanism 32, the valve element 35 is pressed in the direction A by the fluid pressure to open the valve as shown in FIG. As a result, the oil liquid passes through the oil flow path 20 and is discharged to the discharge pipe 26.

At this time, in the negative pressure generating section 29, a negative pressure is generated due to the Venturi effect, that is, the flow velocity of the oil liquid, and the air in the passage 33 opening to the inner wall of the oil passage 20 is sucked into the oil passage 20. To be done. Further, when the refueling is stopped, the valve mechanism 32 is closed and the valve body 35 closes the passage 33, so that the negative pressure disappears and the air suction from the passage 33 is also stopped. Discharge pipe 2
Reference numeral 6 is connected to a pipe connecting member 27 in the nozzle body 24 so as to communicate with the oil flow path 20. The oil supply nozzle 3 having the discharge pipe 26 is adapted to rotate upward and downward around the rotary joint 23 during the oil supply operation.

Reference numeral 49 designates an operating lever, which is a shaft 51 of the supporting portion 50 having a shaft end 49a protruding toward the lower surface 24b of the nozzle body 24.
By being rotatably supported by, the operation end 49b on the other end side extending in a free end shape is rotatable in the C and D directions and swingable in the lateral direction in the E direction. The interlocking lever 53 pivotally attached to the shaft 52 of the nozzle body 24 has one end 53
a contacts the operating lever 49, and the other end 53b contacts the valve mechanism 32.
Is engaged with the engagement hole 54a of the valve shaft 54 that drives the opening and closing.

The valve shaft 54 is composed of a front shaft 70 and a rear shaft 71 slidably fitted to the front shaft 70, as will be described later, and a bearing member 58 inserted into the nozzle body 24 causes A, It is slidably supported in the B direction,
Moreover, the main valve body 30 is pressed against the valve seat member 25 by the spring force of the coil springs 59 and 60. And the operating lever 49
When the operating end 49b is gripped, the interlocking lever 53 rotates clockwise (see FIG. 4), and the valve shaft 5 integrated with the sub valve body 31 is released.
4 is displaced in the valve opening direction (B direction).

A lever guard 55 is attached to the lower surface 24b of the nozzle body 24 so as to surround the operation lever 49. The lever guard 55 is formed in a substantially L shape, and is formed in a U-shaped cross section with a band frame portion 55a having both ends fixed to the nozzle body 24. The lower surface of the nozzle body 24 is surrounded by the front side of the band frame portion 55a. It is composed of two members of a plate frame portion 55b fixed to the side 24b. A locking portion 56 that holds the valve mechanism 32 in the valve open state by locking the operation lever 49 at a predetermined rotation position is provided on the rear side of the band frame portion 55a.

When refueling, the discharge pipe 26 is inserted into the refueling port 6a of the fuel tank 6 and the operating lever 49 is moved to the C position.
Open the valve in the direction. Then, the operating end 49b has the locking portion 5
By being locked by 6, the interlocking lever 53 rotates clockwise, the sub valve body 31 and the main valve body 30 slide in the B direction stepwise, and the valve mechanism 32 opens, and the oil liquid Is supplied through the hose 5 and is discharged from the discharge pipe 26 to the oil supply port 6a.

An air introducing hole 39 for introducing vapor and air in the fuel tank 6 is provided on the lower outer periphery of the tip of the discharge pipe 26, and the air introducing hole 39 communicates with the inside of the discharge pipe 26. The suction tube 40 is inserted. The suction pipe 40 is a thin pipe having a small diameter so that the flow passage area in the discharge pipe 26 is as large as possible, and extends along the inside of the discharge pipe 26 so as to reduce the loss when discharging the oil liquid. At the time of refueling, the other end of the suction pipe 40 is connected to the valve mechanism 3 via the central hole 38 formed in the valve seat member 25 and the pipe connecting member 27 in the nozzle body 24 and the passages 48, 57 and 33.
2 communicates with a negative pressure generating unit 29 provided on the downstream side.

The valve mechanism 32 opens to allow the oil liquid to flow into the oil passage 2
When the oil flows from 0 to the oil flow path 59 in the discharge pipe 26, negative pressure is generated due to the venturi effect of the negative pressure generation unit 29 as the oil liquid flows out, and the air in the passage 33 is sucked. Therefore, at the beginning of refueling, the air from the air introducing hole 39 is introduced into the negative pressure generating portion 29 by the valve opening operation of the valve mechanism 32, and this air becomes oil liquid via the central hole 38 and the passages 48, 57, 33. mixing.

In FIG. 5, reference numeral 61 denotes a diaphragm which functions as an automatic valve closing mechanism, which is arranged beside the valve shaft 54 and
It is provided in an opening 64 that communicates with the space 63 in the nozzle main body 24 where the end of 4 slides. Reference numeral 65 denotes a cap that closes the opening 64 provided on the side of the nozzle body 24, and forms a negative pressure chamber 66 between the diaphragm 61 and the cap.

Reference numeral 67 is a U-shaped receiving plate as shown in FIG. 7, which is a pair of opposed walls 67a and 67b facing each other.
And a long hole 67c in the pair of opposing walls 67a and 67b.
Are formed. The receiving plate 67 is located on the other side of the spring receiver 68 and is fixed to the diaphragm 61. 69 is a pair of rod-shaped rollers, both ends of which in the axial direction are the pair of opposed walls 67.
a and 67b are slidably fitted into long holes 67c, and slidably fitted into the sliding holes 70b of the front shaft 70 through the notches 70a of the front shaft 70 of the valve shaft 54. It is engaged with the engagement groove 71 a of the rear shaft 71.

72 is located in the negative pressure chamber 66 and is located in the cap 6
A spring provided between the No. 5 and the spring receiver 74 urges the rod-shaped roller 69 through the diaphragm 61 and the receiving plate 67 so as to be fitted into the engagement groove 71a of the rear shaft 71.

The negative pressure chamber 66 is connected to the passages 48, 57 and 33 through passages 73 and 74 formed in the nozzle body 24.
It is in communication with. Therefore, the air introduction hole 3 at full tank refueling
When 9 is not blocked by the liquid surface, the valve element 35 is displaced in the A direction, so that the negative pressure is generated in the negative pressure generating portion 29, so that the air is discharged from the air introduction hole 39 at the tip of the discharge pipe 26. It is introduced into the negative pressure generating unit 29 via the suction pipe 40 of the pipe 26, the passage 42 of the valve body 35, the second port 44 and the passages 48, 57 and 33. Therefore, the negative pressure generated in the negative pressure generating portion 29 is compensated by the air supplied from the air introduction hole 39, and as a result, the diaphragm 61 is fixed to the diaphragm 61 without being displaced against the spring force of the spring 72. The rod-shaped roller 69 slidably provided in the long hole 67c of the receiving plate 67 is driven by the spring force of the spring 72 from the cutout portion 70a of the front shaft 70 of the valve shaft 54 to the engagement groove 71a of the rear shaft 71. Is engaged with. As a result, the front shaft 70 and the rear shaft 71 of the valve shaft 54 are connected by the rod-shaped roller 69, and the main valve 30 is operated by the operating lever 49.
It is held in the valve open position in conjunction with the operation of.

Then, when the liquid level of the oil supply port 6a rises and the air introduction hole 39 at the tip of the discharge pipe 26 is closed,
Negative pressure is introduced into the negative pressure chamber 66 via the passages 33, 57, 73 and 74. As a result, as shown in FIG. 9, the diaphragm 61 is separated from the valve shaft 54 against the spring 72, and the rod-shaped roller 69 is disengaged from the engagement groove 71 a of the rear shaft 71. Therefore, the front shaft 70 is released from the connection with the rear shaft 71 which is interlocked with the operation lever 49, and the front shaft 70 is pressed by the spring 59 so that the main valve body 30 abuts on the valve seat member 25 and the valve mechanism 32 is closed. Speak.

Now, the operation of discriminating the oil type when the refueling nozzle 3 having the above structure is used will be described.

The controller 12 of the refueling device 1 executes the processing shown in FIGS. 7 and 8 at the start of refueling.

When the customer's vehicle arrives, the worker at the gas station removes the fueling nozzle 3 from the nozzle hook 4 and inserts the discharge pipe 26 into the fueling port 6a of the vehicle.

When the nozzle switch 11 is turned on in step S1 in FIG. 7 (steps will be omitted hereinafter), the control device 12 moves to step S2 and the suction / exhaust pump 18 causes the vapor suction pipe 1 to operate.
The air in 6 is sucked and discharged from the intake / exhaust port 18a. Then, the timer T is reset and started in S3.

The pump motor 13 has not started yet,
Since the discharge pressure of the pump 9 does not act on the valve body 36 and the valve mechanism 32 is also closed, the valve body 36 is closed by the spring 34.
The air introduction hole 39 is communicated with the vapor suction pipe 16 through the suction pipe 40 and the passage 42 of the valve shaft 37, the first port 43, and the passage 47. Therefore, in S4, the vapor in the fuel tank 6 is sucked by the suction / exhaust pump 18 from the air introduction hole 39 at the tip of the discharge pipe 26 and supplied to the oil type detection sensor 17,
Sampling of the oil type detection value by the oil type detection sensor 17 is started.

When the gasoline determination condition of the vapor sampled in the next S5 is satisfied, the process proceeds to S7 and the tank oil type is set to "gasoline", and when the gasoline determination condition of the sampled vapor is not satisfied, the S6 is performed. timer T passes to it is checked whether the predetermined time t ₁ has elapsed, the tank oil seeds after a predetermined time t ₁ has elapsed is set as "light oil" (S8).

In S9, the timer T is stopped, and in S10, the intake by the intake / exhaust pump 18 is stopped. In the next step S11, it is checked whether the tank oil type and the oil type of the oil supply nozzle 3 match, and if they match, the pump motor 13 is started to drive the pump 9.

If the tank oil type and the oil type of the oil supply nozzle 3 match in S11, the oil amount match indicator 14 is displayed to notify the operator.

Therefore, the operator operates the operation lever 49 of the oil supply nozzle 3 in the C direction to start oil supply. When the operating end 49b of the operating lever 49 is gripped, the interlocking lever 53 rotates clockwise (see FIG. 4), and the valve shaft 54 integrated with the sub valve body 31 is opened in the valve opening direction (B direction). Displace. As a result, the oil liquid (in this case, gasoline) pumped by the pump 9 is supplied to the fuel tank 6 via the hose 5 and the refueling nozzle 3.

That is, when refueling is started by the valve opening operation of the valve mechanism 32, the valve element 35 is pressed in the direction A by the fluid pressure to open the valve as shown in FIG. And is discharged from the discharge pipe 26 to the oil supply port 6a.

Further, since the valve body 35 is displaced in the direction A by the valve opening operation of the valve mechanism 32, the oil type discrimination is performed for the oil port formed in the first port 43 of the valve shaft 37 and the pipe connecting member 27. It blocks the passage 47 and the second port 44.
A liquid level detecting passage 4 formed in the pipe connecting member 27.
8 and the vapor and air sucked from the air introduction hole 39 are supplied to the passage 48.

At this time, in the negative pressure generating portion 29, a negative pressure is generated due to the Venturi effect, that is, the flow velocity of the oil liquid, and the air in the passage 33 opening to the inner wall of the oil passage 20 is sucked into the oil passage 20. To be done. In addition, the amount of oil supplied to the fuel tank 6 is measured by the flow meter 1
It is measured by 0 and displayed on the refueling amount indicator 14.

Further, during refueling, since the valve element 35 is displaced in the A direction, the negative pressure is generated in the negative pressure generating section 29, so that the air from the air introduction hole 39 at the tip of the discharge pipe 26 is discharged. Is introduced into the negative pressure generating section 29 through the suction pipe 40, the passage 42 of the valve element 35, the second port 44 and the passages 48, 57 and 33. Therefore, the diaphragm 61 is displaced toward the valve shaft 54 by the spring force of the spring 72, and the rod-shaped roller 6
9 is fitted into the engagement groove 71a of the rear shaft 71, the shafts 70 and 71 of the rod 54 are connected, and the main valve 30 is held at the valve open position.

In the case of full refueling, the liquid level in the refueling port 6a rises and the air introducing hole 39 at the tip of the discharge pipe 26 is introduced.
Is closed, the passages 33, 57, 7 are formed in the negative pressure chamber 66.
Negative pressure is introduced via 3,74. As a result, as shown in FIG. 9, the diaphragm 61 resists the spring 72 and the valve shaft 5 moves.
4, the rod-shaped roller 69 is disengaged from the engagement groove 71a of the rear shaft 71. Therefore, the front shaft 70
The main valve body 30 comes into contact with the valve seat member 25 by the pressing force of the spring 59, the valve mechanism 32 closes, and the fuel supply is stopped.

When the refueling is stopped, the valve mechanism 32 is closed as shown in FIG. 5, and the valve body 35 is returned in the direction B by the spring force of the spring 34 to close the passage 33. The negative pressure at 29 disappears, which causes passage 33
Air suction from is also stopped. Then, in S13,
When the operator returns the oil supply nozzle 3 to the nozzle hook 4 and the nozzle switch 11 is turned off, the process proceeds to S14, the pump motor 13 is stopped, and the liquid supply by the pump 9 is stopped.

If the oil types do not match in S11, the process goes to S15 to issue an oil type error warning to notify the oil type mismatch, and then it is checked in S16 whether the nozzle switch 11 is turned off. When the refueling nozzle 3 is returned to the nozzle hook 4 in S16 and the nozzle switch 11 is turned off, the process proceeds to S17 to stop the alarm.

When the processing of S14 or S17 is completed, S1
8, the tank oil type setting is cleared, and in S19, the intake / exhaust pump 18 is driven in the exhaust direction, and the air sucked from the intake / exhaust port 18a is pressure-fed to the oil type detection sensor 17 and the vapor suction pipe 16 and sucked last time. The vapor is discharged.

Then, the timer T is reset and started (S20).

When the timer T counts the predetermined time t ₂ in the next S21, the process moves to S22 and the timer T is stopped. Then, the suction / exhaust pump 18 is stopped (S23).

As a result, the previous vapor adhering to the oil type detection sensor 17 and the vapor suction pipe 16 is removed to prepare for the next oil type detection.

12 and 13 show modifications of the present invention.
12 shows the valve mechanism 32 in the closed state, and FIG. 13 shows the refueling operation with the valve mechanism 32 opened.

In both figures, the valve seat member 25 is provided slidably in the A and B directions, is pressed by the main valve body 30 and is displaced in the A direction, and the pipe connecting member is opened by the valve opening operation of the main valve body 30. It is pressed by a spring 81 interposed between the member 27 and 27 and slides in the B direction. An annular switching member 82 is slidably inserted between the outer periphery 25a of the valve seat member 25 and the inner wall of the tip end side opening 24c of the nozzle body 24.

As shown in FIG. 14, the switching member 82 is formed in an annular shape, and passages 83 are axially formed in the inner periphery thereof at regular intervals. Further, a protrusion 25c projects from a step portion 25b on the outer periphery 25a of the valve seat member 25. Therefore, the switching member 82 is pressed against the protrusion 25c of the valve seat member 25 by the spring 81.

When the valve mechanism 32 is closed, the main valve body 3
Since 0 abuts on the valve seat member 25 and slides the valve seat member 25 in the direction A, a passage formed between the outer periphery 25a of the valve seat member 25 and the inner wall of the tip end side opening 24c of the nozzle body 24. 57 is cut off from the passage 73 formed in the nozzle body 24. On the other hand, since the switching member 82 is displaced in the direction A and is separated from the connection pipe 84 to which the vapor suction pipe 16 is connected, the vapor sucked from the air introduction hole 39 is absorbed in the suction pipe 40 and the pipe connection member 27. Passages 48,5
7 and passage 83 of switching member 82, space 8 between protrusion 25c
After passing 5, the oil flows into the vapor suction pipe 16, is supplied to the oil type detection sensor 17, and the oil type is discriminated.

Further, when the main valve body 30 is displaced in the B direction and separated from the valve seat member 25 by the start of refueling, the valve seat member 25 slides in the B direction by the pressing force of the spring 81, and the negative pressure generating portion. Two
The passage 33 communicating with the nozzle 9 and the passage 73 formed in the nozzle body 24 communicate with each other. At the same time, the switching member 82 closes the connection pipe 84 to which the vapor suction pipe 16 is connected.

Thus, the valve seat member 25 and the switching member 8
It is possible to switch so that the vapor and air sucked from the air introduction hole 39 by the sliding operation of 2 are supplied to either the oil type determination passage or the liquid level detection passage.

[0069]

As described above, the refueling nozzle according to the present invention has a switching mechanism that connects the suction passage and the vapor passage before the start of refueling, and connects the suction passage and the negative pressure passage after the start of refueling. Since only one suction passage for sucking vapor and air in the fuel tank is provided inside the discharge pipe, the automatic valve closing mechanism or the automatic valve closing mechanism can be used without narrowing the flow passage in the discharge pipe. The vapor and air in the fuel tank can be supplied to the oil type determination means. Therefore, the resistance when the divided oil liquid flows in the discharge pipe is reduced, and the flow rate at the time of refueling can be secured, the refueling time is shorter than that of the conventional refueling nozzle, and the vehicle having a large fuel tank is filled with the fuel. The customer's waiting time can be shortened even when refueling. Although a small diameter thin tube is used for the suction passage in the discharge pipe, the number of pipes can be reduced to one, facilitating the processing, and further reducing the weight of the discharge pipe of the fueling nozzle. It has the feature that it can reduce the labor of refueling operation even when refueling work.

[Brief description of drawings]

FIG. 1 is a system diagram showing a configuration of an oil supply device.

FIG. 2 is a vertical cross-sectional view of a fueling nozzle according to the present invention.

FIG. 3 is a cross-sectional view of a fueling nozzle according to the present invention.

FIG. 4 is a vertical cross-sectional view showing an enlarged main part of a fueling nozzle.

FIG. 5 is a cross-sectional view showing an enlarged main part of the oil supply nozzle.

FIG. 6 is an enlarged perspective view showing a valve shaft that constitutes a switching mechanism.

FIG. 7 is an enlarged perspective view showing a receiving plate attached to the diaphragm.

FIG. 8 is a cross-sectional view showing an enlarged valve opening operation of the valve mechanism.

FIG. 9 is a cross-sectional view showing an enlarged unlocking operation at the time of detecting the liquid level.

FIG. 10 is a flowchart of processing executed by the control device.

11 is a flowchart of processing executed by the control device subsequent to the processing of FIG.

FIG. 12 is a cross-sectional view showing a modified example of the oil supply nozzle according to the present invention.

FIG. 13 is a cross-sectional view showing a valve opening operation of a modified example of the oil supply nozzle according to the present invention.

FIG. 14 is a perspective view of a switching member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Oil supply device 2 Device main body 3 Oil supply nozzle 4 Nozzle hook 5 Fuel supply hose 6 Fuel tank 9 Pump 10 Flowmeter 12 Control device 16 Vapor suction pipe 17 Oil type detection sensor 18 Suction and discharge pump 24 Nozzle body 25 Valve seat member 26 Discharge pipe 27 Pipe Connection member 29 Negative pressure generating portion 30 Main valve body 31 Sub valve body 35 Valve body 37 Valve shaft 39 Air introduction hole 40 Suction pipe 42 Passage 43 First port 44 Second port 45,46 Groove 47,48 Passage 49 Operation Lever 53 Interlocking lever 61 Diaphragm 67 Support plate 69 Rod roller 70 Front shaft 71 Rear shaft 82 Switching member

Claims (1)

[Claims] 1. A discharge pipe extending from a nozzle body and inserted into a tank oil supply port; a suction passage formed along the discharge pipe for sucking vapor and air in the tank; A valve mechanism that is provided to open the valve by rotating the nozzle lever, a negative pressure generating unit that generates a negative pressure by discharging the oil liquid after the valve mechanism is opened, and a liquid level rise in the tank during liquid supply When the suction passage is closed by the negative pressure generating unit, an automatic valve closing mechanism for closing the valve mechanism by the negative pressure from the negative pressure generating unit, and a negative pressure communicating the automatic valve closing mechanism with the negative pressure generating unit. A passage, a vapor passage for feeding the vapor in the tank to an oil type discriminating means for discriminating the oil type based on the vapor in the tank in which the discharge pipe is inserted, and the suction passage and the vapor before starting the refueling. It communicates with the passage, and after refueling starts Fueling nozzle, wherein the switching mechanism for switching a passage so as to communicate with said a passage negative pressure passage, to become more.