JPH09118400A - Refueling nozzle - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To improve the operability of a refueling nozzle during refueling work and reduce the burden on the operator. A valve shaft (31) is operated by operating an operation switch (53) to operate an electromagnetic actuator (34) to release the engagement between a valve shaft (31) inside a sleeve (28) held in a second position and a movable plunger (36). Is moved in the sleeve 28 by the second spring 33, and the valve element 32 provided on the valve shaft 31 is opened. As a result, the valve body 32 can be opened to perform refueling by simply pressing the operation switch 53 provided on the refueling nozzle 21, so that the operability of the refueling nozzle 21 is improved and the burden on the refueling operator is increased. Can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply nozzle preferably used for supplying fuel to a fuel tank of an automobile, for example.

[0002]

2. Description of the Related Art A fueling device installed in a gasoline service station or the like usually has a fueling device main body equipped with a fueling pump for sucking up and discharging fuel stored in an underground tank, and fuel discharged from the fueling pump for a vehicle. And a fueling nozzle connected to the fueling apparatus main body via a fueling hose so as to supply the fuel tank. In addition, during refueling work, after the discharge pipe provided on the tip side of the refueling nozzle is inserted into the fuel tank of the vehicle, refueling is performed by operating the operating lever of the refueling nozzle.

However, the oil supply nozzle as described above is usually
When the valve opening operation is performed by the operation lever, the valve body that opens and closes the flow path formed in the oil supply nozzle is opened by displacing in the direction opposite to the flow direction of the fuel flowing toward the discharge pipe. It is composed. For this reason, when operating the operation lever to start refueling work, the valve body must be opened against the hydraulic pressure of the fuel flowing into the flow path, and a large operation force is applied to the operation lever. There is a problem in that the operability becomes poor and the burden on the operator becomes large.

On the other hand, for example, Japanese Utility Model Laid-Open No. 63-1670
No. 00, JP-A-3-275497, etc., an electromagnetic on-off valve is arranged in the middle of a refueling pipe connecting a pump of a refueling device main body and a refueling hose, and a refueling nozzle is replaced with an operating lever. A refueling device in which the operability of the refueling nozzle at the time of refueling is improved by providing an operation switch and opening and closing the on-off valve according to the operation of the operation switch to discharge and shut off the fuel from the refueling nozzle. Has been done.

[0005]

However, in the refueling device as described above, the fuel is discharged from the refueling nozzle and shut off by opening and closing the on-off valve provided in the middle of the refueling pipe. Even if the on-off valve closes the refueling pipe by detecting that the tank is full, there will be a response delay before the fuel discharge from the refueling nozzle actually stops, and There is a problem that surplus fuel is discharged.

Further, in the oil supply nozzle of the above-described oil supply device, in order to open and close the fuel passage formed in the oil supply nozzle, the valve is opened by the hydraulic pressure of the fuel flowing in the passage. It has an automatic valve to operate. Further, the automatic valve closes the inside of the flow passage by being urged by the valve spring and seated on the valve seat when the on-off valve provided in the oil supply pipe is closed and the fuel flow in the oil supply nozzle is stopped. It is like this.

However, when the fuel is not refueled, fuel is accumulated in the refueling hose located on the downstream side of the on-off valve provided in the middle of the refueling pipe. Therefore, for example, a suspension-type refueling hose is provided. In the refueling device, the weight of the fuel accumulated in the refueling hose always acts on the automatic valve. Therefore, when a small gap is created between the automatic valve and the valve seat due to the increase in the pressure in the refueling hose as the outside air temperature rises, the fuel accumulated in the refueling hose is There is a risk of leaking to the refueling nozzle side through the gap.

The present invention has been made in view of the above-mentioned problems of the prior art. It is possible to improve the operability at the time of refueling work and reduce the burden on the worker, and the inside of the refueling target becomes full. It is an object of the present invention to provide an oil supply nozzle capable of promptly stopping the supply of fuel when it is detected.

[0009]

In order to solve the above-mentioned problems, a refueling nozzle according to the invention of claim 1 has a nozzle body in which a flow passage for an oil liquid is formed, and the flow passage is opened and closed. A valve body provided in the nozzle body for
A valve shaft accommodating chamber provided in the nozzle body, a first position movably provided in the valve shaft accommodating chamber for closing the valve body, and a second position for allowing the valve body to open. A valve that is located between the sleeve and the nozzle body, a sleeve that is displaced between A first spring provided in the shaft accommodating chamber for urging the sleeve toward the first position, and urging the valve element in the valve opening direction provided between the valve shaft and the sleeve. A second spring is provided on the nozzle body, and engages with the valve shaft to hold the valve body in a closed state against the second spring, thereby engaging with the valve shaft. A valve body opening means for opening the valve body by the second spring when released, and a sleeve normally engaged with the sleeve. Then, the sleeve is held at the second position, and when the rise of the liquid level in the object to be refueled is detected, the engagement with the sleeve is released and the sleeve is moved to the first position by the first spring. It comprises an automatic valve closing mechanism for moving and a sleeve moving means for moving the sleeve from the first position to the second position against the first spring by applying an external force to the sleeve. It becomes.

According to the above structure, when the valve body valve opening means is operated to release the engagement with the valve shaft, the valve shaft moves in the valve opening direction in the sleeve by the second spring, whereby the valve body is opened. Opens and refueling starts. Then, the sleeve is held at the second position by the automatic valve closing mechanism until the liquid level rise of the refueling target is detected, and the valve shaft is kept urged by the second spring in the sleeve. Therefore, the valve body keeps the valve open state and the fuel supply is continued.

When the rise of the liquid level to be refueled is detected by bubbles or the like, the automatic valve closing mechanism operates to release the engagement with the sleeve, and the sleeve moves to the first position by the first spring. As a result, the valve body closes and the refueling stops. In this state, the sleeve moving means is actuated to apply an external force to the sleeve to move the sleeve from the first position to the second position.
If the engagement between the valve body valve opening means and the valve shaft is released by moving the valve body to the position of, the valve shaft moves in the valve opening direction by the second spring and the valve body opens, so that refueling is performed. It will be restarted.

At this time, when an external force is applied to the sleeve by the sleeve moving means, the sleeve moves to the second position, but if the sleeve moving means is stopped to release the external force acting on the sleeve, the sleeve moves to the first position. The spring moves to the first position to prohibit opening of the valve body. Therefore, even if the valve body opening means is operated in a true full state in which the liquid level rise in the object to be refueled is detected by the oil liquid, the sleeve keeps the valve body closed to prevent excessive operation. It can prevent unnecessary refueling.

According to a second aspect of the present invention, the valve body valve opening means is constituted by an electromagnetic actuator that engages and disengages with the valve shaft by a signal from the outside.

According to the above construction, when the electromagnetic actuator is disengaged from the valve shaft by supplying a signal to the electromagnetic actuator from the outside, the valve shaft is opened in the sleeve by the second spring. Since the valve body is opened by moving to, the refueling worker does not need to operate the operation lever or the like, and the burden on the refueling worker can be reduced.

According to a third aspect of the present invention, the sleeve moving means increases the flow rate of the oil liquid discharged into the flow path of the nozzle body to increase the hydraulic pressure of the oil liquid acting on the sleeve. Therefore, the discharge amount control means for moving the sleeve is used.

According to the above construction, in the state where the automatic valve closing mechanism releases the engagement with the sleeve and the sleeve is moved to the first position by the first spring, the flow rate of the nozzle body is controlled by the discharge amount control means. By increasing the flow rate of the oil liquid discharged into the sleeve and increasing the hydraulic pressure of the oil liquid acting on the sleeve, the sleeve moves to the second position against the first spring. In this state, if the engagement between the valve body valve opening means and the valve shaft is released, the valve shaft moves in the valve opening direction by the second spring and the valve body opens, so that refueling is resumed.

At this time, if the discharge amount control means is stopped to reduce the hydraulic pressure of the oil liquid acting on the sleeve, the sleeve is moved to the first position by the first spring and the valve body is opened. Therefore, even if the valve body valve opening means is operated in a true full state, the sleeve keeps the valve body closed to prevent excessive oil supply.

Further, the invention of claim 4 is that the sleeve moving means is constituted by a suction means for moving the sleeve by sucking fluid in the valve shaft accommodating chamber.

According to the above construction, the suction means releases the fluid in the valve shaft accommodating chamber when the automatic valve closing mechanism releases the engagement with the sleeve and the sleeve is moved to the first position by the first spring. By suction, the sleeve provided in the valve shaft accommodating chamber moves to the second position against the first spring. In this state, if the engagement between the valve body valve opening means and the valve shaft is released, the valve shaft moves in the valve opening direction by the second spring and the valve body opens, so that refueling is resumed.

At this time, if the suction of the fluid in the valve shaft accommodating chamber by the suction means is stopped, the sleeve moves to the first position by the first spring and prohibits the opening of the valve body. Even if the valve body valve opening means is operated in the full tank state, the sleeve can hold the valve body in the closed state to prevent excessive refueling.

[0021]

FIG. 1 is a block diagram showing an embodiment of the present invention.
It will be described in detail with reference to FIGS.

First, FIGS. 1 to 10 show an oil supply nozzle according to a first embodiment of the present invention.

In the figure, reference numeral 1 is a refueling device, which is a fixed refueling device body 2 and a refueling nozzle 2 to be described later connected to the refueling device body 2 via a refueling hose 3.
1.

Reference numeral 4 denotes a case of the refueling device main body 2. Inside the case 4, a large-diameter fuel pipe 5 having a lower end communicating with an underground tank (not shown) is provided, and an upper end of the fuel pipe 5 is provided. Is connected to the refueling hose 3.

Reference numeral 6 denotes an oil supply pump disposed in the middle of the fuel pipe 5 and driven by a pump motor 7 which will be described later. The oil supply pump 6 is driven by the pump motor 7 to be stored in an underground tank. The fuel is discharged to the fuel tank of the vehicle through the fuel pipe 5, the fuel hose 3, and the fuel nozzle 21.

Reference numeral 7 denotes a pump motor for driving the oil supply pump 6, and the pump motor 7 changes the number of revolutions in response to a drive control signal from a control device 11 which will be described later to thereby discharge the fuel from the oil supply pump 6. (Discharge pressure) is controlled. Here, the pump motor 7 operates at a normal rotation speed when a low-level drive control signal is supplied from the control device 11, for example, to discharge fuel from the refueling pump 6 at a normal discharge pressure, and drive at a high level. When the control signal is supplied, it operates at a high rotation speed to increase the fuel discharge pressure from the oil supply pump 6.

Reference numeral 8 denotes a flow meter provided on the downstream side of the fuel pump 6 and provided in the middle of the fuel pipe 5.
Is to measure the flow rate of the fuel flowing through the fuel pipe 5 and supply a flow rate detection signal corresponding to the measured flow rate to the control device 11.

Reference numeral 9 is provided on the outer side surface of the main body 1 of the fueling device,
A nozzle hook for accommodating the fueling nozzle 21 at a time other than the time of refueling work (when not refueling). The nozzle hook 9 has a nozzle switch 10 that opens and closes depending on whether the fueling nozzle 21 is hooked or unhooked. It is provided. When the refueling nozzle 21 is removed from the nozzle hook 9 and the nozzle switch 10 is closed, the nozzle switch 10 causes the control device 1 to close.
1 is supplied with a refueling start signal.

Reference numeral 11 denotes a control device provided in the main body 2 of the oil supply device. The control device 11 is composed of, for example, a microcomputer, and the flow detection signal from the flow meter 8 and the oil supply from the nozzle switch 10 are provided. Start signal,
An operation switch 53, which will be described later, provided on the fueling nozzle 21.
A valve opening command signal or the like is supplied from. Then, the control device 11 has a function of displaying the amount of refueling on the display 12 based on the flow rate detection signal from the flowmeter 8, the above-mentioned flowrate detection signal from the flowmeter 8, the refueling start signal from the nozzle switch 10, And a function of controlling the operation (rotation speed) of the pump motor 7 based on a valve opening command signal from the operation switch 53, and a function of operating an electromagnetic actuator 34 described later provided in the oil supply nozzle 21. There is.

Reference numeral 21 denotes an oil supply nozzle connected to the oil supply device main body 2 via the oil supply hose 3. The structure of the oil supply nozzle 21 will be described below in detail with reference to FIGS. 2 to 8.

In the figure, reference numeral 22 denotes a cylindrical nozzle body that forms the outer shell of the oil supply nozzle 21, and inside the nozzle body 22, a large-diameter hole portion whose open end is on the tip side (left side in the figure). Two
3A and a small-diameter valve shaft accommodating hole 23B which is opened in the large-diameter hole portion 23A and into which a sleeve 28 described later is slidably fitted.
And a small-diameter hole portion 23C opened in the valve shaft accommodating hole 23B are concentrically formed, and an actuator 34, which is opened in the small-diameter hole portion 23C and is described later, is accommodated on the closed end side of the small-diameter hole portion 23C. An accommodation recess 23D is formed. Further, as shown in FIG. 4, a fuel inlet port 23E, which opens to the large diameter hole portion 23A and is connected to the fuel supply hose 3, is formed on one side surface of the nozzle body 22, and a valve is provided on the other side surface. An opening 23F is formed which opens in the shaft accommodating hole 23B and is provided with an automatic valve closing mechanism 46 described later. And the nozzle body 2
In the inside of the fuel cell 2, a fuel flow channel 24 mainly composed of a large diameter hole portion 23A and an inflow port 23E is formed.

Reference numeral 25 is a lid that closes the open end of the large diameter hole 23A formed in the nozzle body 22, and the mounting port 25A formed in the center of the lid 25 has a base end of the discharge pipe 26. The side is inserted.

27 is a valve shaft accommodating hole 23B of the nozzle body 22.
The valve shaft accommodating chamber formed inside the valve shaft accommodating chamber 27 is shown.
Are separated from the flow path 24 by a sleeve 28 in a liquid-tight manner.

Reference numeral 28 denotes a sleeve slidably fitted in the valve shaft accommodating chamber 27. The sleeve 28 is formed in a stepped cylindrical shape as a whole, and a valve shaft 31 described later can be slid in the center thereof. A shaft hole 28A is formed so as to penetrate therethrough in the axial direction, and a large diameter spring chamber 28 is formed in the axially intermediate portion of the shaft hole 28A.
B is formed. Here, the sleeve 28 has the nozzle body 2 through the seal member 29 fitted on the outer peripheral side thereof.
The valve shaft accommodating chamber 2 that is slidably inserted into the second valve shaft accommodating hole 23B and is separated from the flow path 24 in the valve shaft accommodating hole 23B.
7 is defined. Further, as shown in FIG. 4, a notch groove 28C that engages with an engagement roller 51, which will be described later, is formed on the outer peripheral surface of the sleeve 28.
1 and a notch groove 28C, a first position (position shown in FIG. 7) approaching a valve seat member 38 described later according to the engagement and disengagement, and a second position (FIG. 4 etc.) separated from the valve seat member 38. Position)
And are taken selectively.

Reference numeral 30 designates a first spring located in the valve shaft accommodating chamber 27 and compressed between the nozzle body 22 and the sleeve 28. The first spring 30 holds the sleeve 28 at the first position. The sleeve 28 is always urged toward the position, and when the automatic valve closing mechanism 46 is operated and the engagement roller 51 is disengaged from the notch groove 28C of the sleeve 28, the sleeve 28 is moved to the first position.

Reference numeral 31 denotes a valve shaft slidably inserted into the shaft hole 28A of the sleeve 28, and the base end side of the valve shaft 31 is slidably inserted into the small diameter hole portion 23C of the nozzle body 22. There is. Further, a large-diameter circular collar portion 31A is formed at an axially intermediate portion of the valve shaft 31, and the circular collar portion 31A is formed by the sleeve 2
No. 8 spring chamber 28B is slidably inserted.

Reference numeral 32 denotes a valve element fixedly provided on the tip side of the valve shaft 31 and provided in the flow path 24. The valve element 32 moves in the flow path 24 together with the valve shaft 31, and the valve seat member 38 will be described later. The flow path 24 is opened and closed by being separated from and seated on the first valve seat 38A.

33 is located in the spring chamber 28B and is located in the valve shaft 31.
Is a second spring compressed between the circular flange portion 31A and the sleeve 28, and the second spring 33 is arranged in a direction (valve opening direction) in which the valve body 32 is separated from the first valve seat 38A. The valve shaft 31 is constantly energized. The spring force of the second spring 33 is set to be smaller than the spring force of the first spring 30.

Reference numeral 34 denotes an electromagnetic actuator as a valve body valve opening means housed in the housing recess 23D of the nozzle body 22. The electromagnetic actuator 34 is composed of a coil 35, a movable plunger 36, and a spring 37. There is.
When the coil 35 is not excited, the electromagnetic actuator 34 causes the movable plunger 36 to project into the small diameter hole portion 23C of the nozzle body 22 by the spring 37 and engage with the proximal end surface of the valve shaft 31. Thereby restricting the axial movement of the valve shaft 31 against the second spring 33,
The state in which the valve element 32 is seated on the first valve seat 38A (the valve closed state)
Hold. The electromagnetic actuator 34 is operated by operating the operation switch 53 so that the coil 3 is moved from the control device 11.
When the excitation signal is supplied to 5, the movable plunger 36 retracts and the engagement state between the movable plunger 36 and the valve shaft 31 is released, so that the second spring 33 causes the valve shaft 31 to move in the axial direction. By allowing the movement, the valve body 32 is separated from the first valve seat 38A and the valve is opened.

Reference numeral 38 denotes a valve seat member located at the opening end side of the large diameter hole 23A and provided in the flow path 24 of the nozzle body 22, and the valve seat member 38 is seated with the valve body 32 separated and seated. Has an annular first valve seat 38A and a later-described automatic valve 41 that is separated and seated, and has a tapered hole-shaped second valve seat 38B formed as a throttle passage, and has an outer peripheral side over the entire circumference. Annular groove 38C
Are formed.

The negative pressure generating passages 39, 39, ... Formed in the valve seat member 38, one end side of each negative pressure generating passage 39 opens in the vicinity of the second valve seat 38B of the valve seat member 38, The other end side is open to the annular groove 38C. Then, in each of the negative pressure generating passages 39, negative pressure is generated by a Venturi action that occurs when the fuel flows near the second valve seat 38B of the valve seat member 38.

Reference numeral 40 denotes an automatic valve supporting member which is located between the lid 25 and the valve seat member 38 and is fitted into the large diameter hole portion 23A of the nozzle body 22, and the central portion of the automatic valve supporting member 40. The automatic valve support portion 40 so as to project toward the valve seat member 38 side.
A is formed to sandwich the automatic valve support portion 40A in the radial direction 2
A pair of fuel passage portions 40B, 40B are formed at the locations. An annular groove 40C that communicates with the annular groove 38C of the valve seat member 38 is formed on the outer peripheral side of the automatic valve support member 40.

Reference numeral 41 denotes an automatic valve slidably fitted in the automatic valve support portion 40A of the automatic valve support member 40.
Is a valve spring 42 compressed between the automatic valve support member 40 and
The valve seat member 38 is normally seated on the second valve seat 38B of the valve seat member 38, and is separated from the second valve seat 38B by the hydraulic pressure of the fuel flowing in the valve seat member 38.

Reference numeral 43 denotes a bifurcated ventilation passage (see FIG. 3) formed in the automatic valve support member 40. Each branch end side of the ventilation passage 43 is opened in the annular groove 38C of the valve seat member 38. A base end side of an air introduction pipe 44 arranged in the discharge pipe 26 is fitted in the collecting portion of the ventilation passage 43.
Then, the tip end side of the atmosphere introducing pipe 44 is opened to the tip end side of the discharge pipe 26 as shown in FIG.

Reference numeral 45 denotes a communication passage formed on the other side surface of the nozzle body 22, one end of which is a valve seat member 38.
Of the automatic valve closing mechanism 46, which will be described later. Therefore,
The diaphragm chamber 49 communicates with the vicinity of the second valve seat 38B of the valve seat member 38 via the communication passage 45, the annular groove 38C, and the negative pressure generation passage 39, and the communication passage 45, the annular groove 38.
C, annular groove 40C, ventilation passage 43 and air introduction pipe 4
4 communicates with the atmosphere.

Reference numeral 46 denotes an automatic valve closing mechanism which is provided on the other side surface of the nozzle body 22 and which automatically closes the valve element 32 when the tip end side of the discharge pipe 26 is closed by fuel during refueling. The valve closing mechanism 46 is roughly composed of a diaphragm 48, a diaphragm chamber 49, a spring 50, an engagement roller 51 and the like, which will be described later.

Reference numeral 47 indicates a lid for closing the opening 23F formed in the nozzle body 22, and reference numeral 48 indicates a diaphragm disposed in the opening 23F.
Is a diaphragm chamber 49 between the opening 23F and the lid 47.
Is defined. Then, the lid 47 and the diaphragm 48
A spring 50 is contracted between and, and the spring 50 constantly urges the diaphragm 48 toward the sleeve 28.

Reference numeral 51 denotes a pair of engagement rollers located in the opening 23F of the nozzle body 22 and attached to the central portion of the diaphragm 48 via a support arm 52 protruding toward the sleeve 28. Moves toward or away from the sleeve 28 according to the displacement of the diaphragm 48. When the inside of the diaphragm chamber 49 is in the atmospheric pressure state, the engagement roller 51 engages with the notch groove 28C formed in the sleeve 28, so that the first spring 3 is engaged.
The sleeve 28 is held at the second position against 0, and when the inside of the diaphragm chamber 49 is in a negative pressure state, the sleeve 28 is separated from the notch groove 28C, so that the first spring 30 causes the sleeve 28 to move to the first position. It is allowed to move to position 1.

Reference numeral 53 denotes an operation switch provided on the rear end surface of the nozzle body 22, for example. By pressing the operation switch 53, a valve opening command signal is supplied to the control device 11 and the control device 11 opens the valve. An excitation signal is output to the coil 35 of the electromagnetic actuator 34 based on the valve command signal.

This embodiment is constructed as described above,
Hereinafter, the refueling work by the refueling device 1 will be described based on the operation characteristic diagram shown in FIG. 9 and the flow chart shown in FIG. 10.

First, in a state in which the fueling nozzle 21 is hooked on the nozzle hook 9 of the fueling device main body 2 (state of FIG. 1),
As shown in FIGS. 3 and 4, the oil supply nozzle 21 holds the sleeve 28 at the second position in which the sleeve 28 is separated from the valve seat member 38, and the movable plunger 3 of the electromagnetic actuator 34 is maintained.
6 engages with the rear end side of the valve shaft 31 so that the valve body 32
Keeps the valve closed.

When the refueling operator removes the refueling nozzle 21 from the nozzle hook 9, the nozzle switch 10 is closed at this time T1 and the refueling start signal is supplied to the control device 11. At this time, the control device 11 determines whether or not the nozzle switch 10 is closed (ON) in step 1, and when it is determined to be “YES”, a low level drive control signal is sent to the pump motor 7 in step 2. Output and operate this at normal speed. As a result, fuel is discharged from the fuel pump 6 with a normal discharge amount.

Next, when the refueling operator inserts the discharge pipe 26 of the refueling nozzle 21 into the refueling port of the fuel tank (not shown) of the vehicle to be refueled and presses the operation switch 53 at time T2, the operation is performed. A valve opening command signal is supplied from the switch 53 to the control device 11. At this time, the control device 11 operates the operation switch 53 in step 3 (O
N) is determined, and if it is determined to be “YES”, the coil 3 of the electromagnetic actuator 34 is determined in step 4.
An excitation signal is output to 5 to activate it.

As a result, the movable plunger 36 of the electromagnetic actuator 34 is momentarily retracted to the coil 35 side and disengaged from the rear end side of the valve shaft 31, so that the valve shaft 31 moves toward the second spring 3.
By moving in the sleeve 28 by means of FIG.
And the valve body 32 opens as shown in FIG. As a result, the fuel discharged from the fuel pump 6 flows through the fuel hose 3 in the passage 24 of the fuel nozzle 21, and the hydraulic pressure of the fuel causes the automatic valve 41 to move away from the second valve seat 38B. Fuel is discharged from the discharge pipe 26 of the nozzle 21, and refueling is started.

At the time of refueling as described above, a negative pressure is generated in each negative pressure generation passage 39 by the Venturi action when the fuel flowing in the flow path 24 flows near the second valve seat 38B of the valve seat member 38. However, the discharge pipe 26 of the refueling nozzle 21
The negative pressure generating passages 39 communicate with the atmosphere through the annular groove 38C, the annular groove 40C, the ventilation passage 43 and the atmosphere introducing pipe 44 until the tip of each of them is blocked by fuel, bubbles or the like. Since the atmosphere is sucked from the front end side opening of the diaphragm 44, the diaphragm chamber 4 of the automatic valve closing mechanism 46 is
The inside of 9 is kept at atmospheric pressure so that the diaphragm 48 does not operate. As a result, the open state of the valve element 32 is maintained, and refueling is continued.

Then, when the liquid level of the fuel rises up to near the tip of the discharge pipe 26 and the tip side opening of the atmosphere introducing pipe 44 is closed by, for example, bubbles generated on the liquid level, the atmosphere introducing pipe at this time T3. The introduction of the atmosphere from 44 into each negative pressure generation passage 39 is stopped, and the inside of the diaphragm chamber 49 communicating with each negative pressure generation passage 39 through the annular groove 38C and the communication passage 45 shifts to a negative pressure state. As a result, the diaphragm 48 is displaced toward the diaphragm chamber 49 side against the spring 50 as shown in FIG.
By removing from the notch groove 28C of No. 8, the sleeve 2
8 is moved by the first spring 30 from the second position to the first position. At this time, the valve shaft 31 has the circular flange 3
1A is engaged with the sleeve 28 so that the sleeve 28
With this movement, the valve element 32 is seated on the first valve seat 38A and is closed, and the refueling is interrupted.

Here, the movable plunger 36 of the electromagnetic actuator 34 is momentarily retracted to the coil 35 side at the above-mentioned time point T2, and then the tip end portion thereof is biased by the spring 37 so that the valve shaft 31 of the valve shaft 31 can be prevented. Since the state of contacting the outer peripheral surface is maintained, when the sleeve 28 moves to the first position together with the valve shaft 31 at the time T3, the movable plunger 36 projects into the small diameter hole portion 23C of the nozzle body 22, and the valve shaft 31 It engages with the rear end side to regulate its axial movement.
As a result, the valve body 32 is held in the closed state.

During the period from the start of refueling to the interruption, the control device 11 determines in step 5 based on the flow rate detection signal from the flow meter 8 whether the fuel is flowing, that is, the valve body 32 is in the valve closed state. When it is determined to be “NO”, it is determined that the refueling is continued, and when it is determined to be “YES”, it is determined that the valve body 32 is closed by the automatic valve closing mechanism 46. To do.

Next, when refueling into the fuel tank is restarted, the refueling operator waits for the bubbles generated in the fuel tank to disappear, and again at time T4 when the inside of the diaphragm chamber 49 shifts to the atmospheric pressure state. The operation switch 53 is pressed. As a result, the valve opening command signal is supplied from the operation switch 53 to the control device 11.

At this time, the control device 11 determines in step 6 whether or not the operation switch 53 has been operated (ON), and when it determines "YES", in step 7, the pump motor 7 is driven at a high level. It outputs a signal to operate it at high rpm. As a result, the fuel discharge pressure from the fuel pump 6 increases, and the fuel introduced into the flow passage 24 of the fuel nozzle 21 exerts a large hydraulic pressure on the end surface of the sleeve 28.

Here, the pressure receiving area of the sleeve 28 is S, the hydraulic pressure of the fuel at high discharge pressure acting on the sleeve 28 is P, the mounting load of the first spring 30 is F1, the spring constant is k1, and the second.
When the mounting load of the spring 33 is F2, the spring constant is k2, and the displacement amount of the first spring 30 and the second spring 33 is X,
The sleeve 28 is hydraulically moved to the first position (position in FIG. 7).
The conditions for moving from to the second position (position in FIG. 4) are

[0062]

Since PS> F1 + F2 + (k1 + k2) X, the hydraulic pressure P is

[0063]

## EQU2 ## The value is set to satisfy P> (F1 + F2 + (k1 + k2) X) / S.

Then, the sleeve 28 moves from the first position toward the second position due to the hydraulic pressure, and at time T5.
In, the engaging roller 51 of the automatic valve closing mechanism 46 engages with the notch groove 28C, so that it is held at the second position as shown in FIG.

On the other hand, the control device 11 starts measuring the elapsed time from the time point T4 when the operation switch 53 is pressed in step 8, and in step 9, the elapsed time is set to the set time t.
It is determined whether the number exceeds 1. Here, the set time t1
Is set to be equal to or slightly longer than the time for the sleeve 28 to move from the first position to the second position by the hydraulic pressure of the fuel. Then, the control device 11 determines “YE
If it is determined to be “S”, then in step 10, the pump motor 7
A low-level drive control signal is output to and this is operated at normal speed. As a result, from the time T4 to the set time t1
At the time point T5 when has elapsed, the discharge pressure from the oil supply pump 6 is switched from the high discharge pressure to the normal discharge pressure.

Next, the control device 11 determines in step 11 whether or not the elapsed time from the time point T4 exceeds the set time t2. Here, the set time t2 is set to a value obtained by adding the waiting time Δt described later to the above-mentioned set time t1, and when the control device 11 determines “YES” in step 11, the electromagnetic actuator is set in step 4. An excitation signal is output to the coil 35 of 34 to operate it.

As a result, at time T6 when the set time t2 has elapsed from time T4, the movable plunger 36 of the electromagnetic actuator 34 is disengaged from the rear end side of the valve shaft 31, and the valve element 32 is opened by the second spring 33. Then, the fuel is again discharged from the refueling nozzle 21 toward the fuel tank with a normal discharge pressure.

After the refueling is restarted as described above, when the front end side of the atmosphere introducing pipe 44 is again closed by the bubbles on the liquid surface, from this time T7, the above-mentioned time T3 to time T.
The operation similar to the operation up to 6 is repeated, that is, the pressing operation of the operation switch 53 (time point T8), the discharge pressure switching of the oil supply pump 6 (time point T9), and the opening of the valve element 32 (time point T10) are repeated to perform the oil supply work. continue.

At the time T11 when the liquid level in the fuel tank rises due to the refueling work and the tip end side of the atmosphere introduction pipe 44 reaches a true full state in which the fuel is blocked, the automatic valve closing mechanism 46 operates. By moving the sleeve 28 to the first position, the valve body 32 is closed. Then, for example, when the refueling operator presses the operation switch 53 at the time point T12, the refueling pump 6 has a high discharge pressure from the time point T12 to the time point T13 when the set time t1 elapses, and the sleeve 28 has an increased hydraulic pressure. To move from the first position to the second position.

At this time, since the inside of the diaphragm chamber 49 of the automatic valve closing mechanism 46 is kept in a negative pressure state when the tip side of the atmosphere introducing pipe 44 is still closed by the fuel, the notch groove 28C of the sleeve 28 is held. And the engaging roller 51
There is a case in which the sleeve 28 passes through the second position as shown in FIG. 8 during the set time t1 in which the oil supply pump 6 and the oil supply pump 6 have a high discharge pressure. And
If the set time t1 has elapsed from the time point T12, the time point T13
When the electromagnetic actuator 34 operates and the movable plunger 36 separates from the rear end side of the valve shaft 31, the valve element 32 is opened by the second spring 33, and the inside of the fuel tank is full. Nevertheless, excessive refueling may occur.

However, the control device 11 according to the present embodiment is
It has a function of preventing excessive refueling when the inside of the fuel tank is full as described above, and the function of preventing this excessive refueling will be described below.

First, the control unit 11 operates the operation switch 53.
The discharge pressure of the oil supply pump 6 is set to a high discharge pressure for a set time t1 from the time T12 when is operated, and the above step 10 is executed at the time T13 when the set time t1 has elapsed to set the pump motor 7 to a low level. A drive control signal is output to operate it at a normal rotation speed. As a result, the discharge pressure of the oil supply pump 6 is switched to the normal discharge pressure and the sleeve 2
Since the hydraulic pressure acting on 8 decreases,
The spring 30 moves toward the first position.

Next, in step 11, the control device 11 determines that the elapsed time from the time point T12 is the waiting time Δ at the set time t1.
It is determined whether or not a set time t2 (t2 = t1 + Δt) including t has been exceeded. Here, the waiting time Δt is determined by the sleeve 28 when the discharge pressure of the oil supply pump 6 is a normal discharge pressure.
Is set to be slightly longer than the time required to move from the position shown in FIG. 8 to the first position shown in FIG. 7 by the first spring 30. Then, the control device 11 performs step 1
When it is determined to be "YES" in 1, it can be determined that the sleeve 28 has moved to the first position. Therefore, in step 4, an excitation signal is output to the coil 35 of the electromagnetic actuator 34 to operate it.

As a result, the electromagnetic actuator 34 operates at the time T14 when the set time t2 elapses from the time T12 when the operation switch 53 is operated, and the movable plunger 36 is disengaged from the rear end side of the valve shaft 31. T
At 14, the sleeve 28 is first moved by the first spring 30.
Has moved to the position. Therefore, the movement of the valve shaft 31 is restricted by the sleeve 28 and the valve opening of the valve element 32 is prohibited, so that excessive fuel supply to the fuel tank can be prevented.

In this way, with the tip side of the air introducing pipe 44 being blocked by the fuel, the operation switch 5
3 is operated, the above-mentioned time point T12 to time point T1
By repeating the operation of No. 4, it is possible to reliably prevent excessive refueling from being performed on the fuel tank in a full tank.

After that, the refueling operator confirms that the fuel tank is full, and then the refueling nozzle 21 is pulled out from the refueling port of the fuel tank and the nozzle hook 9 of the refueling device main body 2 is pulled out.
When the nozzle switch 10 is opened, the nozzle switch 10 is opened, and at the time T15 when the nozzle switch 10 is opened, the control device 1
The supply of the refueling start signal to 1 is stopped.

At this time, the control device 11 determines in step 5 that the valve body 32 is in the closed state, and then determines in step 6 whether or not the operation switch 53 has been pressed.
When it is determined to be "NO", it is determined in step 12 whether or not the nozzle switch 10 is opened (OFF). Then, while the determination in step 12 is “NO”, the determination in step 6 is repeated, and when the determination is “YES”, it is determined that the refueling work is finished because the refueling nozzle 21 is accommodated in the nozzle hook 9. Then, in step 13, a high level drive control signal is output to the pump motor 7 to operate it at a high rotation speed.

As a result, the discharge pressure of fuel from the oil supply pump 6 increases, and the sleeve 28 is hydraulically moved to cause the first spring 3 to move.
It moves toward the second position against 0, and the engaging roller 5 of the automatic valve closing mechanism 46 is inserted into the notch groove 28C at time T16.
When 1 is engaged, it is held at the second position as shown in FIG. 4, and the refueling nozzle 21 returns to the initial state.

Then, the control device 11 starts measuring the elapsed time from the time point T15 when the nozzle switch 10 is opened in step 14, and determines in step 15 whether or not the above-mentioned set time t1 has elapsed. If "YES" is determined, the output of the drive control signal to the pump motor 7 is stopped in step 16, and the refueling control process is ended.

As a result, at the time T16 when the set time t1 has elapsed from the time T15 when the refueling nozzle 21 is housed in the nozzle hook 9, the operation of the pump motor 7 is stopped, the refueling pump 6 is stopped, and a series of refueling work is performed. Ends.

As described above, the oil supply apparatus 1 according to this embodiment
According to the above configuration, the valve body 32 is opened by the second spring 33 only by pressing the operation switch 53 provided on the fuel supply nozzle 21. Therefore, the fuel supply nozzle provided with the operation lever described in the related art. As described above, the operability of the refueling nozzle 21 is improved and the burden on the refueling operator can be reduced as compared with the case of operating the operation lever against the hydraulic pressure.

Further, the discharge and shutoff of the fuel to the fuel tank are performed by the opening / closing operation of the valve body 32 provided in the fuel supply nozzle 21, and the opening / closing operation of the valve body 32 is performed by the second spring. 33, the first spring 30 is used to control the discharge and cutoff of fuel by an on-off valve provided in the middle of the oil supply pipe connecting the oil supply device main body and the oil supply nozzle, as in the prior art. In comparison with
The shutoff can be performed quickly, and the fine discharge amount of fuel can be adjusted.

Further, by seating the valve element 32 on the first valve seat 38A of the valve seat member 38, the flow passage 24 in the nozzle body 22 is closed and the electromagnetic actuator 34 is provided on the rear end side of the valve shaft 31. By engaging the movable plunger 36, the valve closed state of the valve body 32 is maintained,
For example, even when it is applied to an oil supply device including a suspension type oil supply hose, it is possible to reliably prevent the fuel accumulated in the oil supply hose from leaking to the oil supply nozzle 21 side due to the weight of the fuel.

Next, FIGS. 11 to 17 show a second embodiment according to the present invention. In this embodiment, the same components as those in the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 61 denotes an oil supply device provided with an oil supply nozzle according to the present embodiment. The oil supply device 61 is similar to the oil supply device 1 according to the first embodiment, and a fixed type oil supply device main body 62 described later. , A fueling nozzle 71 connected to the fueling device main body 2 via a fueling hose 3.

Reference numeral 62 denotes a refueling device main body, and in the case 4 of the refueling device main body 62, a fuel pipe 5, an oil supply pump 6,
In addition to the pump motor 7, the flow meter 8, the nozzle hook 9, the nozzle switch 10, etc., one end side is opened to the outside of the case 4,
A small-diameter suction pipe 64 is provided, the other end of which is connected to the base end of the air suction hose 63. The tip end side of the air suction hose 63 is connected to a suction passage 73 provided in the oil supply nozzle 71, which will be described later.

Reference numeral 65 denotes an air suction pump provided in the middle of the suction pipe 64. The air suction pump 65 is driven by a suction pump motor 66, and as described later, the suction pipe 64, the air suction hose 63, and the suction pipe. Air in the valve shaft accommodating chamber 27 formed in the oil supply nozzle 71 is sucked through the passage 73 to reduce the pressure in the valve shaft accommodating chamber 27.

Reference numeral 67 denotes a control device, and the control device 67
Is composed of, for example, a microcomputer,
Based on a flow rate detection signal from the flow meter 8, a refueling start signal from the nozzle switch 10, a valve opening command signal from the operation switch 53 provided in the refueling nozzle 71, etc.
It has a function of displaying the amount of oil supply, a function of operating the pump motor 7, a function of operating the electromagnetic actuator 34 provided in the oil supply nozzle 71, and a function of operating the suction pump motor 66.

Reference numeral 71 denotes a refueling nozzle according to this embodiment,
The refueling nozzle 71 has substantially the same configuration as the refueling nozzle 21 according to the first embodiment described above, but as shown in FIGS.
On the side surface where E is formed, a suction passage 73 is formed, one end side of which opens into the valve shaft accommodating chamber 27 and the other end side of which is located near the inflow port 23E and which opens outside the nozzle body 72. The other end of the suction passage 73 is connected to the tip of the air suction hose 63.

The present embodiment has the above-mentioned structure. Hereinafter, the refueling work by the refueling device 61 will be described with reference to FIG.
The operation characteristic diagram shown in FIG. 6 and the flow chart shown in FIG. 17 will be described.

First, the refueling nozzle 71 is connected to the refueling device main body 62.
In the state in which it is hooked on the nozzle hook 9 of FIG.
8 holds the second position separated from the valve seat member 38, and the movable plunger 36 of the electromagnetic actuator 34 engages with the rear end side of the valve shaft 31 to keep the valve body 32 in the valve closed state. doing.

When the refueling operator removes the refueling nozzle 71 from the nozzle hook 9, the nozzle switch 10 is closed at this time T1 ', and the refueling start signal is supplied to the control device 67. At this time, the control device 67 proceeds to step 2
In 1 it is determined whether or not the nozzle switch 10 is closed (ON), and when it is determined to be "YES", in step 22, a drive signal is output to the pump motor 7 to operate it. As a result, fuel is discharged from the refueling pump 6 toward the refueling nozzle 71.

Next, when the refueling operator inserts the discharge pipe 26 of the refueling nozzle 71 into the refueling port of the fuel tank (not shown) of the vehicle to be refueled and presses the operation switch 53 at time T2 ', the A valve opening command signal is supplied from the operation switch 53 to the control device 67. At this time, the control device 67 determines whether or not the operation switch 53 is operated (ON) in step 23, and when it determines “YES”, outputs an excitation signal to the coil 35 of the electromagnetic actuator 34 in step 24. To activate this. Thereby, the movable plunger 36 of the electromagnetic actuator 34 is
Is momentarily drawn to the coil 35 side and separated from the rear end side of the valve shaft 31, the valve shaft 31 moves in the sleeve 28 by the second spring 33, and the valve element 32 opens as shown in FIG. Speak. As a result, the fuel discharged from the refueling pump 6 flows through the refueling hose 3 in the flow path 24 of the refueling nozzle 71,
Since the automatic valve 41 is separated from the second valve seat 38B by the hydraulic pressure of the fuel, the discharge pipe 26 of the refueling nozzle 71 is separated.
Fuel is discharged from and fueling is started.

At the time of refueling, a negative pressure is generated in each negative pressure generating passage 39 by the Venturi action when the fuel flowing in the flow path 24 flows near the second valve seat 38B of the valve seat member 38. However, until the tip of the discharge pipe 26 of the refueling nozzle 71 is blocked by fuel, bubbles, etc., the negative pressure generation passages 39 pass through the annular groove 38C, the annular groove 40C, the ventilation passage 43 and the atmosphere introduction pipe 44. Since it communicates with the atmosphere, the diaphragm chamber 49 of the automatic valve closing mechanism 46
The inside is kept at atmospheric pressure. As a result, the valve body 32 maintains the valve open state, and refueling is continued.

Then, when the liquid level of the fuel rises to the vicinity of the tip of the discharge pipe 26 and the tip side of the atmosphere introducing pipe 44 is blocked by, for example, bubbles generated on the liquid level, negative pressure is generated at this time T3 '. The introduction of the atmosphere into the passage 39 is stopped, and the inside of the diaphragm chamber 49 communicating with each negative pressure generating passage 39 through the annular groove 38C and the communicating passage 45 shifts to a negative pressure state. As a result, as shown in FIG. 13, the diaphragm 48 is displaced toward the diaphragm chamber 49 side against the spring 50, and the engagement roller 51 is disengaged from the notch groove 28C of the sleeve 28, so that the sleeve 28 is released from the first spring. 30 moves from the second position to the first position. At this time, the valve shaft 31 moves together with the sleeve 28 due to the circular flange portion 31A engaging with the sleeve 28, and the valve body 3
2 is seated on the first valve seat 38A and is closed, and the refueling is interrupted.

Here, after the movable plunger 36 of the electromagnetic actuator 34 is momentarily retracted to the coil 35 side at the above-mentioned time point T2 ', the tip end portion thereof is the valve shaft 31.
When the sleeve 28 moves to the first position together with the valve shaft 31 at the time T3 ′, the movable plunger 36 projects into the small diameter hole portion 23C of the nozzle body 22, and the valve is held in contact with the outer peripheral surface of the valve body. It engages with the rear end side of the shaft 31 to regulate its axial movement. As a result, the valve body 32 is held in the closed state.

At the time of refueling, the control device 67
In step 25, it is determined whether fuel is flowing based on the flow rate detection signal from the flow meter 8, that is, whether the valve element 32 is in the valve closed state, and refueling is performed while it is determined to be "NO". When it is determined that the above is continuing and when it is determined to be “YES”, it is determined that the valve body 32 is closed by the automatic valve closing mechanism 46.

Next, when refueling into the fuel tank is restarted, the refueling operator waits for the bubbles generated in the fuel tank to disappear, and at time T4 'when the inside of the diaphragm chamber 49 shifts to the atmospheric pressure state. The operation switch 53 is pressed again. As a result, the valve opening command signal is supplied from the operation switch 53 to the control device 67.

At this time, the control device 67 controls the step 26.
In step 27, it is determined whether or not the operation switch 53 is operated (ON), and when it is determined as "YES", in step 27, a drive signal is output to the suction pump motor 66 to operate it.

As a result, the air suction pump 65 operates and the suction pipe 64, the air suction hose 63, and the suction passage 73.
The negative pressure acts on the sleeve 28 by sucking the air in the valve shaft accommodating chamber 27 of the oil supply nozzle 71 through.
Then, the sleeve 28 moves the first spring 3 by the negative pressure.
0 and the second spring 33 to move toward the second position, and the engaging roller 51 of the automatic valve closing mechanism 46 engages with the notch groove 28C at time T5 ′, so that FIG.
Is held in the second position as shown in FIG.

On the other hand, the controller 67, in step 28,
The measurement of the elapsed time from the time T4 'when the operation switch 53 is pressed is started, and it is determined in step 29 whether the elapsed time exceeds the set time t1'. Here, the set time t1 'is set to be equal to or slightly longer than the time required for the sleeve 28 to move from the first position to the second position due to the negative pressure generated in the valve shaft accommodating chamber 27. Then, when the control device 67 determines “YES” in step 29, in step 30, the output of the drive signal to the suction pump motor 66 is stopped and the suction pump motor 66 is stopped. As a result, the operation of the air suction pump 65 is stopped at time T5 ′ when the set time t1 ′ has elapsed from time T4 ′, and atmospheric pressure is introduced into the valve shaft accommodating chamber 27.

Next, the control device 67 determines in step 31 whether the time elapsed from the time point T4 'exceeds the set time t2'. Here, the set time t2 ′ is set to a value obtained by adding the waiting time Δt ′ described later to the above-mentioned set time t1 ′, and the control device 67 determines “YE” in step 31.
When it is determined to be "S", in step 24, an excitation signal is output to the coil 35 of the electromagnetic actuator 34 to operate it.

As a result, from the time T4 ', the set time t
At the time T6 ′ when 2 ′ has elapsed, the movable plunger 36 of the electromagnetic actuator 34 is disengaged from the rear end side of the valve shaft 31, the valve body 32 is opened by the second spring 33, and the refueling nozzle 71 returns to the fuel tank. Fuel is discharged toward.

After the refueling is resumed as described above, when the tip end side of the atmosphere introducing pipe 44 is again closed by the bubbles on the liquid surface, the operation from this time T7 'to the above time T3' to time T6 '. The same operation as described above, that is, the operation of the operation switch 53 (time T8 '), the operation and stop of the air suction pump 65 (time T9'), and the opening of the valve element 32 (time T1).
0 ') is repeated to continue the refueling work.

Then, at the time T11 'when the liquid level in the fuel tank rises due to the refueling work and the tip end side of the atmosphere introducing pipe 44 reaches a true full state in which it is blocked by the fuel, the automatic valve closing mechanism 46 operates. By moving the sleeve 28 to the first position, the valve element 32 is closed. Then, for example, when the refueling worker presses the operation switch 53 at time T12 ', this time T12'.
From the first position to the second position due to the negative pressure generated in the valve shaft accommodating chamber 27 by the operation of the air suction pump 65 until the time T13 'when the set time t1' elapses.
Move to the position.

At this time, since the inside of the diaphragm chamber 49 of the automatic valve closing mechanism 46 is kept in a negative pressure state when the front end side of the atmosphere introducing pipe 44 is still closed by the fuel, the notch groove 28C of the sleeve 28 is held. And the engaging roller 51
It is supposed that the sleeve 28 passes through the second position as shown in FIG. 15 during the set time t1 ′ during which the and are not engaged and the air suction pump 65 is operating. Then, assuming that the set time t1 'has elapsed from the time T12', the electromagnetic actuator 34 operates at the time T13 ',
When the movable plunger 36 is disengaged from the rear end side of the valve shaft 31, the valve body 32 is opened by the second spring 33, and excessive fuel is supplied even though the fuel tank is full. May be done.

However, the control device 67 according to the present embodiment is
It has a function of preventing excessive refueling when the inside of the fuel tank is full as described above, and the function of preventing this excessive refueling will be described below.

First, the control device 67 is operated by the operation switch 53.
Is operated for a set time t1 'from the time T12' to operate the suction pump motor 66 to reduce the pressure in the valve shaft accommodating chamber 27, and at the time T13 'after the set time t1', the above step 30 is performed. Run and suction pump motor 6
Stop 6 As a result, the air suction pump 65 stops and the inside of the valve shaft accommodating chamber 27 of the refueling nozzle 71 shifts to the atmospheric pressure state, so that the sleeve 28 moves toward the first position by the first spring 30. .

Next, in step 31, the control device 67 sets the elapsed time from the time point T12 'to the set time t2' (t2 '= t1' + Δ), which is the set time t1 'plus the waiting time Δt'.
It is determined whether t ') has been exceeded. Where waiting time Δ
The time t'is slightly longer than the time required for the inside of the valve shaft accommodating chamber 27 to be in the atmospheric pressure state and for the sleeve 28 to move from the position shown in FIG. 15 to the first position shown in FIG. 14 by the first spring 30. It is set. Then, the control device 67
When it is determined to be “YES” in step 31, it can be determined that the sleeve 28 has moved to the first position. Therefore, in step 24, the coil 35 of the electromagnetic actuator 34 is
An excitation signal is output to and this is activated.

As a result, the time T1 when the set time t2 'has elapsed from the time T12' when the operation switch 53 was operated.
At 4 ', the electromagnetic actuator 34 is actuated and the movable plunger 36 is disengaged from the rear end side of the valve shaft 31, but at this time T14', the sleeve 28 is moved to the first position by the first spring 30. . Therefore, the movement of the valve shaft 31 is restricted by the sleeve 28 and the valve opening of the valve element 32 is prohibited, so that excessive fuel supply to the fuel tank can be prevented.

In this way, with the tip end side of the atmosphere introducing pipe 44 being blocked by the fuel, the operation switch 5
3 is operated, the above-mentioned time T12 'to time T
By repeating the operation of 14 ', it is possible to surely prevent excessive refueling from being performed on the full-filled fuel tank.

After that, when the refueling operator confirms that the fuel tank is full, the refueling nozzle 71 is pulled out from the refueling port of the fuel tank and housed in the nozzle hook 9 of the refueling device main body 62, the nozzle switch 10 is turned on. When the nozzle switch 10 is opened, the supply of the refueling start signal to the control device 67 is stopped at time T15 'when the nozzle switch 10 is opened.

At this time, the control device 67 proceeds to step 25.
After it is determined that the valve body 32 is closed in step 2,
At 6, it is determined whether or not the operation switch 53 has been pressed, and when it is determined as "NO", at step 32 it is determined whether or not the nozzle switch 10 is opened (OFF). The determination in step 26 is repeated while the determination in step 32 is “NO”. When the determination is “YES”, it is determined that the refueling work is finished because the refueling nozzle 71 is accommodated in the nozzle hook 9. Then step 3
In step 3, the output of the drive signal to the pump motor 7 is stopped to stop the pump motor 7, and in step 34, a drive signal is output to the suction pump motor 66 to operate it.

As a result, at time T15 ', the oil supply pump 6 is stopped, the air in the valve shaft accommodating chamber 27 is sucked by the air suction pump 65, and the sleeve 28 is
Due to the negative pressure generated in the valve shaft accommodating chamber 27, it moves toward the second position against the first spring 30, and at the time point T16 ', the engaging roller 51 of the automatic valve closing mechanism 46 is inserted into the notch groove 28C.
Is engaged, the fuel is retained at the second position as shown in FIG. 12, and the refueling nozzle 71 returns to the initial position.

Then, the control device 67 starts measuring the elapsed time from the time T15 'when the nozzle switch 10 is opened in step 35, and determines in step 36 whether or not the set time t1' has passed. If it is determined to be "YES", the suction pump motor 66 is operated in step 37.
The output of the drive signal to is stopped and the refueling control process is ended.

As a result, at the time T16 'when the set time t1' has elapsed from the time T15 'when the refueling nozzle 71 is housed in the nozzle hook 9, the operation of the suction pump motor 66 is stopped and the inside of the valve shaft housing chamber 27 is closed. Transition to atmospheric pressure,
A series of refueling work is completed.

Also in this embodiment described above, by simply pressing the operation switch 53 provided on the oil supply nozzle 71,
Since the valve body 32 is configured to be opened by the second spring 33, compared with the case where the operation lever is operated against hydraulic pressure such as the oil supply nozzle having the operation lever described in the related art, the oil supply is performed. The operability of the nozzle 71 is improved, and the burden on the refueling operator can be reduced.

In the first embodiment, the discharge pressure of the oil supply pump 6 is changed by controlling the rotation speed of the pump motor 7, but the present invention is not limited to this. A relief valve may be provided between the pump 6 and the oil supply nozzle 21, and the discharge pressure from the oil supply pump 6 may be changed by changing the relief set pressure of the relief valve.

Also, in the first embodiment, the sleeve 2
The movement of 8 from the first position to the second position is detected by the elapsed time from the time when the fuel discharge amount of the fuel pump 6 is increased, and in the second embodiment, the sleeve 2
The case where the movement of 8 from the first position to the second position is detected by the time elapsed from the time when the air suction pump 65 is operated has been described as an example, but the present invention is not limited to this. For example, a position sensor or the like may be used to directly detect the position of the sleeve 28.

In the second embodiment, the case where the valve shaft accommodating chamber 27 is isolated from the fuel and the air in the valve shaft accommodating chamber 27 is sucked by the air suction pump 65 has been taken as an example. The present invention is not limited to this. For example, the valve shaft accommodating chamber 27 may be filled with fuel and the sleeve 28 may be moved by sucking the fuel.

Further, in each of the above-described embodiments, the operation switch 53 is set to the nozzle body 22 (7) of the oil supply nozzle 21 (71).
2) The case where it is provided on the rear end face has been described as an example, but the present invention is not limited to this, and may be provided on the refueling device main body 2 (62) side, for example.

[0122]

As described above in detail, according to the invention of claim 1, the valve body is opened by the second spring by disengaging the valve body from the valve body opening means. Since the valve body is opened by moving inside, the operability is greatly improved compared to the oil supply nozzle equipped with an operation lever that opens the valve body against the hydraulic pressure of the oil liquid. It is possible to reduce the burden on the refueling worker. In addition, since the valve body opening means is engaged with the valve shaft to hold the valve body in the closed state, the fuel accumulated in the fuel supply hose or the like is refueled by the self-weight of the fuel supply hose when it is not refueled. It can be surely prevented from leaking to.

Further, when the sleeve is moved to the first position by the automatic valve closing mechanism and the valve body is closed, the sleeve moving means is actuated to apply an external force to the sleeve to move the sleeve to the first position. Since the valve body is returned to the state in which the valve body can be opened by moving the valve body from the position to the second position, for example, additional lubrication after the valve body is closed by detecting bubbles generated on the liquid surface. Can be easily dealt with. Further, when the automatic valve closing mechanism operates, the sleeve moving means is stopped to release the external force acting on the sleeve, whereby the sleeve is moved to the first position by the first spring and the valve body is opened. Because it is configured to prohibit
For example, it is possible to reliably prevent excessive refueling when the refueling target is a true full state.

According to the second aspect of the present invention, a signal is externally supplied to the electromagnetic actuator to release the engagement with the valve shaft, so that the valve shaft moves in the sleeve by the second spring. Since the valve element is configured to open, the operability can be significantly improved compared to a fueling nozzle equipped with an operating lever for opening the valve element, and the burden on the fueling operator can be reduced. You can

According to the third aspect of the invention, the discharge amount control means discharges the discharge amount (discharge amount) of the oil liquid while the sleeve is moved to the first position by the automatic valve closing mechanism and the valve body is closed. Pressure) is increased to move the sleeve to the second position against the first spring by the hydraulic pressure acting on the sleeve. Therefore, for example, the bubble generated on the liquid surface can be detected. Thus, it is possible to easily cope with additional oil supply after the valve body is closed.

Further, according to the invention of claim 4, the suction means sucks the fluid in the valve shaft accommodating chamber in a state where the sleeve is moved to the first position by the automatic valve closing mechanism and the valve body is closed. As a result, the sleeve in the valve shaft accommodating chamber is moved to the second position against the first spring, so that the valve body is closed by, for example, detecting bubbles generated on the liquid surface. It is possible to easily cope with additional refueling later.

[Brief description of the drawings]

FIG. 1 is an external view showing a fueling device including a fueling nozzle according to a first embodiment of the present invention.

FIG. 2 is a partially cutaway vertical cross-sectional view showing an oil supply nozzle in FIG.

FIG. 3 is an enlarged longitudinal sectional view showing a main part in FIG. 2;

FIG. 4 is a cross-sectional view as viewed from a direction indicated by arrows IV-IV in FIG. 3;

FIG. 5 is a vertical cross-sectional view at the same position as in FIG. 3, showing a state in which the valve element is opened.

6 is a cross-sectional view as seen from the direction of arrows VI-VI in FIG.

FIG. 7 is a sectional view of the same position as FIG. 6 showing a state where the valve body is closed by the automatic valve closing mechanism.

FIG. 8 is a cross-sectional view of the same position as FIG. 6 showing a state where the sleeve has passed the second position.

FIG. 9 is an operation characteristic diagram showing the operation of the oil supply device over time.

10 is a flowchart showing a refueling work process by the control device in FIG.

FIG. 11 is an external view showing a liquid oil supply device provided with an oil supply nozzle according to a second embodiment of the present invention.

12 is an enlarged cross-sectional view of the main part of the fueling nozzle in FIG. 11 at the same position as in FIG.

FIG. 13 is a sectional view of the same position as in FIG. 12 showing a state where the valve body is opened.

FIG. 14 is a cross-sectional view of the same position as FIG. 12 showing a state where the valve body is closed by the automatic valve closing mechanism.

FIG. 15 is a sectional view of the same position as FIG. 12, showing a state in which the sleeve has passed the second position.

FIG. 16 is an operational characteristic diagram showing the operation of the oil supply device over time.

FIG. 17 is a flowchart showing a refueling work process by the control device in FIG. 11.

[Explanation of symbols]

 1,61 Oil supply device 2,62 Oil supply device main body 3 Oil supply hose 6 Oil supply pump 7 Pump motor 11,67 Control device 21,71 Oil supply nozzle 22,72 Nozzle body 27 Valve shaft accommodating chamber 28 Sleeve 30 First spring 31 Valve shaft 32 valve body 33 second spring 34 electromagnetic actuator 46 automatic valve closing mechanism 53 operation switch 65 air suction pump 73 suction passage

Claims (4)

[Claims] 1. A nozzle main body having a flow passage formed therein, through which an oil liquid flows, a valve body provided in the nozzle main body for opening and closing the flow passage, and a nozzle main body provided in the nozzle main body. A valve shaft accommodating chamber and a sleeve that is movably provided in the valve shaft accommodating chamber and is displaced between a first position for closing the valve body and a second position for allowing the valve body to open. A valve shaft that is axially movably inserted into the sleeve and has the valve element provided on the tip side, and that is provided between the sleeve and the nozzle body and is provided in the valve shaft accommodating chamber; A first spring for urging the sleeve toward the first position; a second spring provided between the valve shaft and the sleeve for urging the valve element in the valve opening direction; The valve body is provided to close the valve body against the second spring by engaging with the valve shaft. Valve opening means for opening the valve element by the second spring by releasing the engagement with the valve shaft, An automatic valve closing mechanism that holds the second position and releases the engagement with the sleeve to move the sleeve to the first position by the first spring when the rise of the liquid level in the refueling target is detected. And a sleeve moving means for moving the sleeve from the first position to the second position against the first spring by applying an external force to the sleeve. 2. The oil supply nozzle according to claim 1, wherein the valve body valve opening means is constituted by an electromagnetic actuator that engages and disengages with the valve shaft according to a signal from the outside. 3. The discharge for moving the sleeve by increasing the flow rate of the oil liquid discharged into the flow path of the nozzle body to increase the hydraulic pressure of the oil liquid acting on the sleeve by the sleeve moving means. The refueling nozzle according to claim 1, wherein the refueling nozzle comprises a quantity control means. 4. The oil supply nozzle according to claim 1, wherein the sleeve moving means is constituted by suction means for moving the sleeve by sucking fluid in the valve shaft accommodating chamber.