JPH0818639B2 - Refueling nozzle device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fueling nozzle device provided in a fueling station or the like, and more specifically, a negative pressure is generated by flowing oil, and the fueling is stopped by the rise of the negative pressure. The present invention relates to a refueling nozzle device configured so as to be able to.

2. Description of the Related Art Conventionally, in addition to (a) controlling refueling only by a mechanical structure, in recent years, (b) a sensor for directly detecting a liquid level or a bubble level in a refueling tank of an automobile, etc. For controlling valves, etc., and (c) Negative pressure value due to negative pressure being generated in the nozzle device as seen in Japanese Patent Laid-Open No. 2-46375 and the opening to the atmosphere being blocked by liquid or bubbles Is used to mechanically react to the valve closing due to an increase in the valve, and then to automatically open the valve by turning the pump on and off.

The latter two (b) and (c) are useful because they are automatically refueled to the last minute just by setting the nozzle device to the refueling port, but depending on the model, the refueling port And the shape of the oil supply pipe is complicated, the oil rebounds a lot or the air does not escape easily.If the above automatic oil supply is performed, the operation of oil supply and stop will be repeated complicatedly, and it will take a long time for oil supply. It may cost. In such a case, in the prior art of the last person (c) holding the switching means, the function of automatic refueling is canceled and refueling is performed manually.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the prior art device that switches between automatic lubrication by electric control and manual lubrication by traditional mechanical control only, it is necessary to displace the valve seat of the main valve of the nozzle device, and therefore a large pressure is applied. There was a loss, and we had no choice but to use a motor with a double output for driving the pump.

Further, in the above prior art (c), a diaphragm is provided to mechanically react to an increase in negative pressure to close the valve, and as described above, the function of automatic lubrication is canceled so that manual lubrication can be performed. Although the automatic refueling and the manual refueling cannot be easily switched at hand by the operator, while directly refueling, it is possible to directly see the occurrence of bubbles of fuel oil, etc. In order to switch from automatic refueling to manual refueling, or to manual refueling or automatic refueling, it is necessary to operate a changeover switch provided at a location away from the nozzle device such as the main body of the refueling device, which is not convenient. is there.

Therefore, an object of the present invention is to provide a refueling nozzle device that can use a small motor as in the past, that is, does not generate a large pressure loss and can easily switch between automatic refueling and manual refueling.

Means for Solving the Problems The present invention is to displace a diaphragm by the rise of a negative pressure generated by oil flowing through a flow path, and mechanically open and close an on-off valve in association with the displacement of the diaphragm. And a means for outputting an electric signal by detecting an increase in the negative pressure, which is provided in a region where negative pressure is generated, and a negative pressure of the diaphragm. Restricting means for restricting the displacement due to the rise of the diaphragm and a non-regulating position that does not restrict the displacement due to the rise of the negative pressure of the diaphragm, and the restricting position and the non-regulating position of the restricting means. A holding means that is rotatably provided in a plane perpendicular to the direction of displacement, and that holds the restricting means at the restricting position by rotating it, and that the restricting means is disposed at the non-restricting position. A fuel supply nozzle device, characterized in that it comprises a position detecting means for output.

Operation According to the present invention, an electric negative pressure detecting means for detecting an increase in the negative pressure and outputting an electric signal is provided at the position where the negative pressure is generated in the oil supply nozzle device. Means are provided for restricting displacement of the displacing diaphragm. The oil flow rate is adjusted by the output from the electric negative pressure detection means. Further, when adjusting the oil flow rate based on the output of the electric negative pressure detecting means, the displacement of the diaphragm is regulated by the regulating means. In this state, the on-off valve that opens and closes the oil passage is not opened due to the displacement of the diaphragm, and the oil flow rate is adjusted only by the output from the electric negative pressure detecting means.

The restricting means is provided so as to be displaceable between a restricting position that restricts the displacement of the diaphragm and a non-restricting position that does not restrict the displacement, and the holding means is perpendicular to the displacement direction extending between the restricting position and the non-restricting position of the restricting means. It is rotatably provided in one plane. By rotating the holding means at the regulating position of the regulating means, the regulating means can be held at the regulating position, and thereby the displacement of the diaphragm can be regulated. Further, by further rotating the holding means, the state in which the regulating means is held at the regulating position can be released,
The restriction state of the displacement of the diaphragm by the restriction means can be released.

The state in which the displacement of the diaphragm due to the increase in the negative pressure is regulated by the regulation means in this manner is held by the holding means. Since such a holding means is provided in the refueling nozzle device, the worker automatically refuels while the displacement due to the increase in the negative pressure of the diaphragm is restricted depending on the vehicle type and the bubbling state of the fuel oil during refueling. When lubrication is switched to manual lubrication in which displacement due to increase in negative pressure of diaphragm is not regulated, or when the manual lubrication is switched to the automatic lubrication,
Because the diaphragm is held in either the regulated or unrestricted state, the operator does not have to continuously perform the operation to maintain the regulating means in the regulated or non-restricted position, and thus the operator. Constraining the refueling work by one refueling nozzle device is prevented, and convenience is improved. Further, since the position detecting means detects that the regulating means is arranged at the non-regulating position, if the regulating means is arranged at the non-regulating position due to the output from the position detecting means, it means that the refueling is manual refueling. It is possible to prevent malfunctions by making a judgment and switching to manual refueling, whereby automatic refueling is performed in a state where the regulating means is arranged in the non-regulating position, or manual refueling is performed in a state in which the regulating means is arranged.

Embodiment FIG. 1 is a system diagram showing the overall configuration of an embodiment of the present invention. A pump 2 is provided in a housing 1 of a refueling device provided in a gas station or the like, and the pump 2 is driven by a motor 3 and is fed from a storage tank (not shown) in which fuel oil such as gasoline or light oil is stored. Is pumped through the oil feed pipe 4, and is fed to the oil feed nozzle device 9 according to the present invention through the flow meter 5, the oil feed pipe 6, the curved pipe 7 and the oil feed hose 8.

The flow rate pulse generator 10 outputs a flow rate pulse signal each time the flow rate meter 5 measures a unit flow rate, for example, 1/100. The output from the flow pulse generator 10 is input to the control means 11. This control means 11 is an indicator based on the pulse signal from the flow pulse generator 10.
A signal for displaying the flow rate is derived to 12 and the measured value measured by the flow meter 5 is displayed on the display 12 digitally, for example.

The state in which the refueling nozzle device 9 is locked to the nozzle case 14 is detected by the nozzle detection switch 13, and when the refueling nozzle device 9 is removed from the nozzle case 14, a nozzle disengagement signal is output. The signal from the nozzle detection switch 13 is input to the control means 11.

FIG. 2 is a sectional view of the oil supply nozzle device 9. A main valve 17 and a sub-valve 18 are provided in the oil passage 16 in the oil supply nozzle device 9 and are biased by a compression coil spring 19 in a direction in which the valve is always closed (left in FIG. 2). ing. Main valve 17
The auxiliary valve 18 is provided on the valve rod 20, and the manual operation lever 21 is angularly displaced in the counterclockwise direction in FIG. It is displaced to the left in FIG. 2 against the spring force of 19, whereby the auxiliary valve 18 and the main valve 17 are opened in this order, and the flow passage 16 communicates with the flow passage 23. The flow path 23 communicates with the flow path 24.

The valve rod 20 is also provided with a check valve 25, which is biased by a compression coil spring 26 in a direction to close the flow path 23. When the auxiliary valve 18 and / or the main valve 17 are opened, the check valve 25 is displaced along the valve rod 20 to the left in FIG. 2 by the pressure of the inflowing oil. The compression coil spring 26 has such a spring force that the check valve 25 is opened by the pressure of oil. When the check valve 25 is opened against the spring force of the compression coil spring 26, a narrowed portion 28 is formed between the inner peripheral surface of the valve seat 27 and the outer peripheral surface of the check valve 25. When the oil flows through the narrowed portion 28, a negative pressure is created in the passage 29 that opens toward the narrowed portion 28. This negative pressure is introduced into the diaphragm chamber 31 in which the diaphragm 30 is provided. The diaphragm chamber 31 is partitioned by the diaphragm 30 into an atmospheric pressure chamber 32 communicating with the atmosphere and a negative pressure chamber 33 communicating with the passage 29. Further, the diaphragm 30 has a compression coil spring 34.
It is elastically biased downward in FIG. The negative pressure chamber 33 is connected to one end of a pipe 39 through a passage 35 and a passage 38. The conduit 39 has an opening 42 facing the outer peripheral surface of the discharge pipe 41 on the inner side in the bending direction near the tip of the discharge pipe 41. A coil spring 43 is screwed from the base end portion of the discharge pipe 41 to the vicinity of the front end portion, and if the discharge pipe 41 is inserted into the oil supply port by the coil spring 43, the oil supply is performed in a released state. It is provided in order to prevent the discharge pipe 41 from being pulled out from the fuel filler port when the fuel is opened.

FIG. 3 is an enlarged sectional view near the diaphragm chamber 31. The diaphragm chamber 31 is closed by a lid 45 airtightly attached to the main body 44. In the center of the lid 45, the shaft 46
Is formed in an airtight manner, and an insertion hole 47 is formed.
A locking piece 49 is screwed onto one end 48 of the shaft 46 inserted through the end facing the negative pressure chamber 33. Further, the operation piece 52 is locked to the other end 50 of the shaft 46 by the pin 51. This operation piece
A compression coil spring 53 is provided between the shaft 52 and the lid 45.
It is mounted around 46.

FIG. 4 is a plan view of the lid body 45 seen from above in FIG. 3, and FIG. 5 is a cross-sectional view seen from the section line VV in FIG. Marks M1 and M2 are formed on the surface of the lid 45 that faces the upper side, projecting from the surface and displaced by 90 degrees in the circumferential direction. The tip 54 of the operation piece 52 has a mark M1
In the state of facing, the stoppers 5657 formed so as to project radially outward from the base 55 of the locking piece 49 are fitted into the recesses 58, 59 formed in the lid 45, respectively. In this state,
The upper surface 60 of the locking piece 49 is attached to the lower surface 61 of the lid 45 by a compression coil spring.
It is elastically abutted by the spring force of 53. Thus, in the state where the upper surface 60 of the locking piece 49 is in contact with the lower surface 61 of the lid 45, that is, in the state where the regulating means is arranged at the non-regulating position, one of the stoppers 57, 57 has one stopper 57. This is detected by the position detector S1 which is a position detecting means embedded in the lid 45. In the vicinity of the detector S1, a negative pressure detector S2, which is negative pressure detecting means for detecting a negative pressure on the negative pressure chamber 33 side of the diaphragm chamber 31, is provided embedded in the lid 45. There is. The negative pressure detector S2 detects the negative pressure introduced through the passage 29 when the oil flows through the narrowed portion 28.

The lid 45 in which the above-mentioned recesses 58, 59 are formed, the recesses 58, 59
A stopper piece 49 in which stoppers 56 and 57 that fit in the stopper piece are formed, a shaft rod 46 connected to the stopper piece 49, an operation piece 52 locked by the shaft rod 46, and a compression coil spring 53 are held. Means are configured.

The operation piece 52 is pressed downward along the axis in FIG. 3 against the spring force of the compression coil spring 53, and is angularly displaced to the right in FIG. When the stopper is operated so as to face the mark M2, the stoppers are recessed 58,59 as shown by phantom lines 56a, 57a in FIG.
It is locked at a position that is disengaged from. That is, by pressing the operation piece 52 against the spring force of the compression coil spring 53, the upper surface 60 of the locking piece 49 is slightly lower than the lower surface 62 of the lid 45 facing the negative pressure chamber 33. The stoppers 56 and 57 are arranged at the flat position, and the stoppers 56 and 57 are brought into contact with the lower surface 62 at the positions where the recesses 58 and 59 are not formed by operating the locking piece 49 in this state by angular displacement. Be stopped. In addition, a generally cylindrical rib 63 that is integrally formed with the base portion 55 of the locking piece 49 and projects to one side in the axial direction has a substantially U-shaped contact that is integrally fixed to the diaphragm 30. The restricting means is placed in the restricting position by abutting on the contact piece 64. In such a state, even if the negative pressure in the negative pressure chamber 33 rises, the diaphragm 30 cannot be displaced upward, and therefore the diaphragm 30
Displacement is prevented.

The restricting means includes the rib 63 formed on the locking piece 49 and the contact piece 64 fixed to the diaphragm 30.

The diaphragm 30 has a pair of locking rollers shown in FIG.
A support piece 67 for supporting both ends of 65, 66 is fixed, and the diaphragm 30 is interlocked with the locking rollers 65, 66 via the support piece 67, so that the diaphragm 30 is not displaced. Then, the respective locking rollers 65 and 66 are not pulled out from the concave groove 68 formed in the valve rod 20, so that the valve rod 20 is not displaced in the axial direction thereof. Therefore, as long as the operator holds the operating lever 21, the valve rod 20 remains pressed, and the main valve 17 and the sub valve 18 remain open. In such a state, when there is an output from the negative pressure detector S2, the output of the motor 3 that drives the pump 2 is controlled and the flow rate is limited.

FIG. 6 is a block diagram showing the control means 11 and the configuration related thereto. Refueling nozzle device 9 is the nozzle case
When the nozzle device 9 is detached from the nozzle 14, the nozzle detachment signal a1 is derived in response to the detachment of the nozzle device 9 from the nozzle detection switch 13. The nozzle disengagement signal a1 is input to the pump motor control circuit 73 to operate the motor 3 and also to the counting circuit.
It is input to 70 as a reset signal, whereby the count value of the counting circuit 70 is reset, and the zero signal a2 is output to the display 12 to display zero. A flow rate pulse signal a3 corresponding to the flow rate from the pulse oscillator 10 is input to the counting circuit 70. The flow rate pulse signal a3 is also input to the determination circuit 71. The determination circuit 71 compares the negative pressure value a4 from the negative pressure detector S2 with the negative pressure setting value a5 stored in advance in the negative pressure value setting circuit 72, and the negative pressure value a4> the negative pressure setting value. When a5 is reached, a small flow rate refueling permission signal a6 is output to the pump motor control circuit 73. Then, the determination circuit 71 starts counting the flow rate pulse signal a3 at the same time as outputting the small flow rate refueling permission signal a6, and the count value corresponds to the small flow rate value stored in advance in the small flow rate setting circuit 74, for example, 0.5 small flow rate. The small flow rate refueling permission signal a6 is derived until the value signal a7 matches the value.

When the two values match, the determination circuit 71 outputs the standard refueling permission signal a8 to the pump motor control circuit 73. When the standard refueling permission signal a8 is input, the pump motor control circuit 73 outputs the standard refueling drive signal a9 to the motor 3. As a result, the motor 3 drives the pump 2 at the standard speed.

If the negative pressure rises again during the standard speed refueling after the previous rise in negative pressure is detected, the amount of refueling from the last negative pressure rise is the monitoring flow rate set by the monitoring flow rate setting circuit 76. , Monitoring flow value signal a1 corresponding to 1, for example
If it is within 0, the pump stop signal a11 is derived to the pump motor control circuit 72, and the motor 3 is stopped by the oil supply stop signal a12 from the pump motor control circuit 72.

FIG. 7 is a flow chart for explaining the refueling operation of the refueling nozzle device 9. When the refueling nozzle device 9 is removed from the nozzle case 14 in step n1, this is detected by the nozzle detection switch 13 in step n2, and the nozzle removal signal a1 is output. The pump motor control circuit 73 to which the nozzle disengagement signal a1 is input outputs the standard speed oil supply drive signal a9 to drive the motor 3 at the standard speed. At the same time, the counting circuit 70, to which the nozzle leaving signal a1 is input, returns the previous count value to zero and outputs a zero signal a2 to display the indicator 12
Is displayed as zero. In step n3, the refueling operator operates the operation lever 21 while holding the refueling nozzle device 9 and inserting the discharge pipe 41 into the refueling port of the refueling tank of the vehicle to be refueled. The valve 17 is opened in this order, and the fuel oil pumped by the pump 2 is supplied from the discharge pipe 41 into the oil supply port.

In step n4, when the negative pressure detector S2 is used for full refueling, the tip 54 of the operation piece 52 is operated so as to be arranged so as to face the mark M2, and the stopper 56 is operated by the position detector S1. Or 57 is not detected,
The output a13 from the position detector S1 is not input to the determination circuit 71. In such a state, the stoppers 56, 5 of the locking piece 49 are
7 contacts the lower surface 62 of the lid 45, and the contact piece 64 contacts the rib 63 to prevent the diaphragm 30 from being displaced toward the negative pressure chamber 33. In this way, when the refueling operation is continued and the state is almost full, the bubbles or splashes of oil that have risen up to the vicinity of the refueling port block the opening 42 of the discharge pipe 41, whereby the inside of the negative pressure chamber 33 is closed. Negative pressure value increases. In this case, the process proceeds to step n6, and the negative pressure value a4 from the negative pressure detector S2 is compared with the negative pressure set value a5 stored in the negative pressure value setting circuit 72. As a result, when the negative pressure value a4 is larger than the negative pressure set value a5 (a4> a5), the determination circuit 71 keeps the determination amount until the set amount of 0.5 stored in the small flow rate setting circuit 74 is supplied. The pump motor control circuit 73 which outputs the small flow rate refueling permission signal a6 and receives this small flow rate refueling permission signal a6 outputs the small flow rate refueling drive signal a12 to the motor 3 to perform the small flow rate refueling. In step n7, when the number of flow rate pulse signals a3 from the flow rate pulse transmitter 10 reaches the number of small flow rate value signals a7 from the small flow rate setting circuit 74, the process moves to step n8,
Pump 2 is driven at standard speed.

In step n9, the determination circuit 71 compares the negative pressure value a4 from the negative pressure detector S2 and the negative pressure setting value a5 from the negative pressure value setting circuit 72, and when it is determined that the negative pressure has risen again. The process proceeds to step n10, and it is determined whether or not the amount of oil supply from the time of the previous increase in the negative pressure value at this time has reached the monitored amount stored in the monitored flow rate setting circuit 76, for example, 1. If the monitored amount has been reached, the process moves to step n6 and again to step n6.
The operation from to n10 is repeated.

If the monitored flow rate has not been reached in step n10, the process proceeds to step n11, in which the motor 3 is stopped by the pump stop signal a11 output from the determination circuit 71,
Pump 2 is stopped. After that, in step n12, it is determined whether or not additional fuel is to be supplied.
Then, the refueling operation ends in step n14.

When performing additional refueling, the process proceeds to step n22, where the additional refueling switch SW provided on the housing 1 of the refueling device main body is pressed to input the additional refueling signal a14 from the additional refueling switch SW to the determination circuit 71. Is
The judgment circuit 71 sends the standard speed permission signal a8 to the pump motor control circuit.
73 to the pump motor control circuit 73 in step n23.
The standard speed lubrication signal a9 from the motor 3 drives the motor 3 at the standard speed to start the additional lubrication operation.

At the step n4, the position detector S1 stops the stopper 56.
If 57 is detected, refueling control by a mechanical automatic refueling stop mechanism (hereinafter referred to as a mechanical auto mechanism), in other words, by displacement of diaphragm 30, main valve 17, sub valve
The refueling control in which 18 is closed has priority over the refueling control based on the negative pressure detector S2. When refueling is performed and it is close to filling, the opening 42 is blocked by oil liquid or bubbles,
The negative pressure value in the negative pressure chamber 33 increases. Then step n15
At 30, the diaphragm 30 is displaced, and refueling is automatically stopped at step n16.

Next, in step n17, it is determined whether or not additional fuel is to be supplied. If not, the process proceeds to step n18, in which the operator returns the oil supply nozzle device 9 to the nozzle case 14. As a result, the nozzle leaving signal a1 disappears in step n19,
The standard speed refueling drive signal a9 output from the pump motor control circuit 73 until then disappears and the motor 3 is stopped, whereby the pump 2 stops and the refueling operation ends at step n14. If additional refueling is required, step n25
After returning to the operation lever 21, the operation lever 21 is once returned, and then refueling is continued by pulling again at step n26.

On the other hand, in step n15, when the mechanical auto mechanism does not operate to stop the refueling even though the negative pressure value has increased, the process proceeds to step n20, and the monitoring time setting circuit 7
If the negative pressure continues to rise above the negative pressure value set in the negative pressure setting circuit 72 for more than a predetermined monitoring time, for example, 1 second, some failure has occurred in the mechanical auto mechanism. It is judged that refueling will not be stopped, the mechanical auto priority state is released, and the judgment circuit 71 sends the pump stop signal a1.
Since 1 is output, the motor 3 is stopped in step n21,
Therefore, the pump 2 is stopped. Worker steps
At n22, the refueling nozzle device 9 is returned to the nozzle case 14, and at step n14, the refueling operation ends.

In the above-described embodiment, it is determined whether to continue refueling or to end refueling based on the monitored flow rate value stored in the monitored flow rate setting circuit 74, but the time corresponding to each of these flow rates is stored in advance. It is also possible to separately provide a set circuit that has been set, and to make the determination based on the time, and in the monitoring time setting circuit 75, the limit value of the refueling amount after the negative pressure value becomes high, not the time, is set. Set it up,
When refueling is performed in excess of this limit value, it may be determined that the mechanical auto mechanism has a failure, and the motor 3 may be stopped. The position detector S1 is of the magnetic reaction type used in proximity switches or the like, or the reflected light detection type of the light transmitter / receiver is used, and the negative pressure detector S2 is a diffusion type semiconductor pressure transducer used in blood pressure monitors. In addition, a capacitance type or strain gauge that captures the strain of the diaphragm is used.

In addition, in the present embodiment, although the description is given on the premise that the position detector S1 is present, the oil supply stop operation by the mechanical auto mechanism operates slightly faster than the deceleration rotation of the motor 3 by the negative pressure detector S2 or the stop operation. By adjusting so that the position detector S1 can be adjusted, the position detector S1 can be eliminated. It should be noted that the control of the oil supply speed can be performed not by controlling the motor 3 but by providing the oil supply pipe 6 with a control valve.

EFFECTS OF THE INVENTION According to the present invention, the negative pressure detection means electrically detects the generation of negative pressure, and on the other hand, the displacement of the diaphragm is regulated by the regulation means so that the mechanical closing of the valve can be released. Since the pressure is restricted, the negative pressure is detected only by the negative pressure detecting means when the displacement of the diaphragm is restricted by the restricting means, and the refueling operation can be controlled by the increase of the negative pressure. Also, if the negative pressure rises while the displacement of the diaphragm is not controlled by the regulating means, the diaphragm will be displaced quickly and the mechanical auto mechanism will operate, and the refueling will be stopped, so the operator will not be able to set the time set by the small flow rate setting circuit. Refueling can be restarted manually immediately without waiting for the progress, and even if the negative pressure often rises due to the influence of bubbles of fuel oil, etc., the electric refueling control can be made by the operator's judgment regardless of the rise in the negative pressure. Alternatively, either mechanical or manual refueling control can be selected, so that a full refueling can be performed quickly. Further, the structure of the nozzle device need only be slightly improved on the one having the mechanical refueling control means that has been used conventionally, and the pressure loss of the flow path due to the use of this nozzle device is not different from the conventional one. Therefore, a motor with a large output is not required, which is economically advantageous.

Further, according to the present invention, since the regulating means can be held by the holding means at the regulating position for regulating the displacement of the diaphragm, the displacement of the diaphragm is regulated even when the worker is refueling. The automatic refueling state and the manual refueling state in which the diaphragm is displaced due to an increase in the negative pressure can be easily switched between the regulated state and the non-restricted state of the diaphragm at hand, greatly improving convenience. Can be improved. Further, since the position detecting means detects that the regulating means is arranged at the non-regulating position, automatic lubrication is performed in the state where the regulating means is arranged at the non-regulating position,
Alternatively, if manual refueling is performed in the state in which it is arranged at the regulation position, it is possible to prevent what time.

[Brief description of drawings]

FIG. 1 is an overall system diagram of an embodiment of the present invention, FIG. 2 is a sectional view of an oil supply nozzle device 9, FIG. 3 is an enlarged sectional view around a diaphragm chamber 31, and FIG. 4 is an upper part of FIG. FIG. 5 is a plan view seen from FIG. 5, FIG. 5 is a cross-sectional view taken along the section line VV of FIG.
FIG. 6 is a block diagram showing the control means 11 and the configuration related thereto, and FIG. 7 is a flow chart for explaining the refueling operation by the refueling nozzle device 9. 2 ... Pump, 3 ... Motor, 5 ... Flow meter, 9 ... Oil supply nozzle device, 10 ... Flow rate pulse transmitter, 11 ... Control means, 13 ... Nozzle detection switch, 16, 23, 24 ... … Channel, 21
...... Manual operation lever, 30 ...... Diaphragm, 31 ...... Diaphragm chamber, 35,38 ...... Passage, S1 ...... Position detector, S2 ...
... Negative pressure detector

Claims (1)

[Claims] Claim: What is claimed is: 1. A diaphragm is displaced by an increase in negative pressure generated by oil flowing through the flow passage, and the opening / closing valve is mechanically opened in association with the displacement of the diaphragm to shut off the flow passage. In a fueling nozzle device configured to perform, a means provided in a region where negative pressure is generated, for detecting an increase in the negative pressure and outputting an electric signal, and a displacement of the diaphragm due to the increase in the negative pressure are regulated. Restricting means provided so as to be displaceable between a restricting position and a non-restricting position that does not restrict the displacement of the diaphragm due to an increase in the negative pressure, and a displacement direction that is perpendicular to the restricting position and the non-restricting position of the restricting means. Holding means that is rotatably provided in one plane and that holds the restricting means at the restricting position by rotating, and position detecting means that detects that the restricting means is placed at the non-restricting position. A refueling nozzle device comprising: