JPH06183497A - Oil feed nozzle - Google Patents

Abstract

PURPOSE:To enhance safety of an oil feed nozzle by minimizing the damages to the oil feed nozzle and preventing oil leakage when a car starts running with a discharge pipe inserted into an oil feed port during oil feeding. CONSTITUTION:A fragile part 37 is formed on the periphery of a connection port member 32 connecting a nozzle body 11 to a discharge pipe 17. A safety valve seat 38 is formed on the periphery of a valve support 32C. A ring-shaped valve disc 34C of an automatic valve 34 supported with the valve support 32C of the connection port member 32 seats on the safety valve seat 38. The shaft of the automatic valve 34 plugs the suction passage 42 when it seats on the safety valve seat. Thus, when the fragile part 37 breaks, a spring 35 disengages to close the valve, preventing oil leakage from an oil passage 16.

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 which is provided at a tip end side of an oil supply hose of an oil supply device and which supplies oil from a discharge pipe.

[0002]

2. Description of the Related Art Conventionally, while refueling, the discharge pipe of a refueling nozzle remains inserted in the refueling port of a fuel tank of a vehicle.
If the vehicle starts running due to the driver's carelessness, an unreasonable external force will act on the discharge pipe of the refueling nozzle, damage the discharge pipe and the refueling nozzle, and discharge the oil, causing a fire accident. There is a risk of causing

In order to prevent this, in the conventional refueling device, a safety joint device is provided which can be detached when a large external force is applied to the joint between the refueling hose or the joint between the refueling nozzle and the refueling hose. The safety joint device is normally normally open, and has a safety valve mechanism inside which is closed when the joint is disengaged.

[0004]

By the way, in the above-mentioned prior art, since the oil supply nozzle and the oil supply hose are separated and the safety valve mechanism prevents the oil liquid from leaking from the oil supply hose, a fire or the like is caused. Although it is possible to secure the safety against, there are the following problems.

First, a safety joint device must be provided in the middle of the fuel supply hose or between the fuel supply nozzle and the fuel supply nozzle, and the mass applied to the fuel supply nozzle becomes heavy, which reduces the workability of the fuel supply work.

Secondly, the refueling nozzle or the refueling hose must be replaced with a new one, which increases the repair cost and the repair time.

The present invention has been made in view of the above-mentioned problems of the prior art. The present invention makes it possible to easily break the base end side of the discharge pipe in an emergency when an external force that is not normally applied during refueling work is applied to the discharge pipe. By operating the automatic valve provided in the refueling nozzle as a safety valve, it is an object of the invention to provide a refueling nozzle that has high safety, can reduce repair cost, and can also shorten repair time.

[0008]

A fueling nozzle according to the present invention is provided with a nozzle main body having a flow passage therein, a discharge pipe provided in the nozzle main body, and a nozzle main body for opening and closing the flow passage. The valve body, an operation lever for opening and closing the valve body, and a state in which the valve body is opened by the operation lever, the bubble / liquid detection unit provided at the tip of the discharge pipe is closed. An automatic valve closing mechanism that closes the valve body when
Provided in the vicinity of the connecting portion between the nozzle body and the discharge pipe,
An automatic valve that normally sits on the valve seat and closes, and receives pressure from the flow of oil liquid to open, and a negative pressure generation unit that generates negative pressure due to the flow of oil liquid are the bubble / liquid detection unit. The first aspect of the present invention employs an air suction passage communicating with an automatic valve closing mechanism to solve the above-mentioned problems. A fragile portion that breaks when an external force is applied to the pipe is provided, and a safety valve seat on which the automatic valve is seated is provided upstream of the fragile portion so that the flow path is closed when the fragile portion is broken. The automatic valve is provided with a valve shaft that closes the negative pressure generating portion side of the air suction passage when seated on the safety valve seat.

Further, the feature of the configuration adopted by the second invention is that a fragile portion that breaks when an external force acts on the discharge pipe is provided in the vicinity of the connecting portion between the nozzle body and the discharge pipe, and the fragile portion is provided in the automatic valve. A valve shaft is provided to close the negative pressure generating portion side of the air suction passage so that the automatic valve closing mechanism is activated when the valve is broken.

Further, the structure of the oil supply nozzle of the third invention is such that the nozzle main body having a flow passage therein, the discharge pipe provided in the nozzle main body, and the nozzle main body for opening and closing the flow passage are provided. A valve body, an operating lever that opens and closes the valve body, and a valve body that is provided near the connecting portion between the nozzle body and the discharge pipe and normally sits on a valve seat to close the valve body. The present invention is characterized by an automatic valve that is opened by receiving pressure and is adopted by the third invention. A fragile portion near the connecting portion between the nozzle body and the discharge pipe that breaks when an external force acts on the discharge pipe. Is provided, and a safety valve seat on which the automatic valve is seated is provided upstream of the fragile portion so that the flow path is closed when the fragile portion is broken.

[0011]

According to the structure of the first invention, when an external force acts on the discharge pipe and the fragile portion is broken, the automatic valve is seated on the safety valve seat and the air suction passage is closed by the valve shaft. This prevents the oil liquid in the flow path from leaking from the oil supply nozzle body.

According to the structure of the second invention, when an external force acts on the discharge pipe to break the fragile portion, the valve shaft of the automatic valve closes the air suction passage to operate the automatic valve closing mechanism. Then, the flow path is closed by the valve body, and the oil liquid in the flow path is prevented from leaking from the oil supply nozzle main body.

According to the structure of the third invention, when the fragile portion is broken due to the external force acting on the discharge pipe, the automatic valve is seated on the safety valve seat so that the oil liquid in the flow passage is replenished. Prevent it from leaking from the body.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. First, FIGS. 1 to 4 show a first embodiment.

In the figure, reference numeral 10 denotes an oil supply nozzle provided at the tip of an oil supply hose H, which is composed of a nozzle body 11 and a discharge pipe 17, which will be described later. The nozzle body 11 of the oil supply nozzle 10 has a linear rod shape as a whole. A valve body accommodating portion 12 located at an intermediate portion in the longitudinal direction, a cylinder portion 13 and a gripping portion 14 respectively located in front of and behind the valve body accommodating portion 12, and a side surface of the valve body accommodating portion 12. And a boss portion 15 (see FIG. 2) communicating with the oil supply hose H via the elbow joint H1. The base end of the refueling hose H is provided in a main body of a refueling device (not shown), and an oil liquid is supplied to the refueling nozzle 10 through the refueling hose H by driving a pump in the main body of the refueling device. ing.

The inside of the nozzle body 11 is a boss portion 1.
An oil passage 16 as a flow passage is formed from 5 to the cylindrical portion 13. Reference numeral 17 denotes a discharge pipe attached to the tubular portion 13 side of the nozzle body 11 via a connection port member 32 described later. The base end side of the discharge pipe 17 communicates with the oil passage 16 and the front end thereof is the discharge port 17A. Has become.

Reference numeral 18 denotes a valve seat member which is located in the middle of the oil passage 16 and is provided in the nozzle body 11, and the valve seat member 1
A first valve seat portion 18A, which is formed on one side of the main valve body 20, which forms a valve body 19 by projecting in an annular shape so as to be seated on and off,
On the other side, a second valve seat portion 18B formed in a tapered surface shape is formed so that an automatic valve 34, which will be described later, can be seated on and off. Here, the auxiliary valve body 21 is inserted at the center of the main valve body 20, and the minute passage 20 is inserted into the main valve body 20.
A and 20A are provided.

Reference numeral 22 denotes a valve shaft, a connecting lever 24, which will be described later, is engaged with the base end side of the valve shaft 22, and a sub-valve body 21 is formed at the tip end side. Further, by rotating the operating lever 23 in the direction of arrow A by operating the opening / closing valve of the operating lever 23, the valve shaft 22 is displaced in the direction of arrow B in FIG. The body 21 is separated from the first valve seat portion 18A, the oil passage 16 is opened, and the oil liquid is supplied to a fuel tank (not shown) through the discharge pipe 17.

Reference numeral 23 is an operating lever, and 24 is a connecting lever. A free end 23A of the operating lever 23 is indicated by an arrow A.
L-shaped communication lever 24 by rotating in the direction
Is also rotated to move the valve shaft 22 rearward (direction of arrow B).

As shown in FIG. 2, 25 is the nozzle body 11
2 shows an automatic valve closing mechanism provided on the side surface of the automatic valve closing mechanism 25. The automatic valve closing mechanism 25 is generally composed of a diaphragm 26, a cap 27, a negative pressure chamber 28, a receiving plate 29, a pair of rod-shaped rollers 30 and a spring 31. Has been done.

The automatic valve closing mechanism 25 operates when the bubble / liquid detector 41, which will be described later, is closed by the liquid surface or the bubble surface, and the valve shaft 22 is indicated by the arrow regardless of the position of the operating lever 23. When the valve element 19 (main valve element 20 and sub valve element 21) is displaced in the opposite direction to the B direction and automatically seats on the first valve seat portion 18A of the valve seat member 18 and closes, the oil It is designed to stop the supply of liquid.

The configurations of the valve body 19 and the automatic valve closing mechanism 25 are known in JP-A-63-178996 and JP-A-63-272699.

32 is located on the front side of the valve seat member 18,
The connecting port member formed in the shape of a double cylinder is fixed to the nozzle body 11 by the cylindrical fastening member 33. The proximal end side of the discharge pipe 17 is screwed to the distal end of the outer cylinder of the connecting port member 32. A pipe mounting portion 32A whose outer peripheral surface is tapered toward the front side is formed. Further, a valve shaft 34A of an automatic valve 34, which will be described later, is provided behind a cylindrical valve support portion 32C formed via a leg portion 32B projecting radially inward on the inner peripheral side of the connection port member 32. The negative pressure tube 40 is slidably inserted, and the negative pressure tube 40 is inserted in the front. The negative pressure tube 40 is positioned inside the valve support portion 32C, and the spring 35 is held between the negative pressure tube 40 and the valve shaft 34A.

Reference numeral 34 denotes an automatic valve. The automatic valve 34 includes a valve shaft 34A, an umbrella-shaped valve body portion 34B formed on the tip end side of the valve shaft 34A, and a diameter-increasing end of the valve body portion 34B. The formed annular valve body portion 34C is provided with a spring 35 and a weak spring 36 on the base end side of the valve shaft 34A and the tip end side of the valve body portion 34B, respectively.

Here, the spring 35 is located in the valve support portion 32C, and is stretched between the base end portion of the negative pressure pipe 40 to be described later and the valve shaft 34A.
The second valve seat portion 18B of No. 8 is urged to be seated. Further, the weak spring 36 is stretched between a spring receiver 18C that is formed to project radially inward of the valve seat member 18 and a valve body portion 34B of the automatic valve 34, and a second spring of the automatic valve 34 is provided. It generates a weak biasing force in the direction opposite to the biasing force toward the valve seat portion 18B.

Reference numeral 37 denotes a fragile portion formed on the outer peripheral surface of the pipe attachment portion 32A of the connection port member 32 over the entire circumference thereof. The fragile portion 37 is attached to the pipe when the external force acts on the discharge pipe 17. The portion 32A is easily broken.

Reference numeral 38 indicates an annular safety valve seat which is a feature of this embodiment, and the safety valve seat 38 is on the rear end side of the pipe mounting portion 32A of the connection port member 32 and on the valve support portion 32.
A seal member 3 formed on the outer peripheral side of C and formed on the safety valve seat 38 with rubber or the like as an elastic member.
9 is attached.

Then, the fragile portion 37 of the connection port member 32.
Is broken, the negative pressure pipe 40 provided on the discharge pipe 17 is removed, so that the spring 35 for urging the automatic valve 34 to the rear also disappears.
The annular valve body 34C of No. 4 is attached to the safety valve seat 38 by the seal member 3
Sit through 9 As a result, the communication between the oil passage 16 and the discharge pipe 17 is cut off, and the discharge of the oil liquid is prohibited. The valve shaft 34A of the automatic valve 34 is connected to the safety valve seat 3
When the automatic valve 34 is seated at 8, the base end side of the valve shaft 34A has an axial dimension that can close each intake passage 45 described later.

Reference numeral 40 denotes a negative pressure pipe inserted into the discharge pipe 17, one end of the negative pressure pipe 40 is connected to the foam / liquid detecting section 41 opened at the discharge port 17A, and the other end is a valve of the connection port member 32. It is fixed to the front of the support portion 32C and holds the spring 35 between the valve shaft 34A of the automatic valve 34.

Reference numeral 42 denotes a suction pipe line, and the suction pipe line 42 is formed in the leg portion 32B of the connection port member 32 so as to be oblique in the radial direction. Reference numeral 43 indicates an annular ventilation passage, which includes the tubular portion 13, the connection port member 32, and the valve seat member 18.
It is formed between and. Reference numeral 44 denotes a ventilation path, which is formed in the nozzle body 11 and is used for the automatic valve closing mechanism 25.
Of the negative pressure chamber 28.

Reference numerals 45 and 45 denote intake passages as negative pressure generating portions formed in the valve seat member 18. One of the intake passages 45 is in the annular ventilation passage 43 and the other is in the second valve seat. Part 1
It is formed so as to open to 8B.

Here, the negative pressure pipe 40, the suction conduit 42, the annular ventilation passage 43, the ventilation passage 44 and the intake passage 45 constitute an air suction conduit according to this embodiment.

The refueling nozzle of this embodiment is constructed as described above. Next, the function of the refueling nozzle when the valve is opened will be described.

First, the refueling nozzle 10 in which the discharge pipe 17 is inserted into the refueling port of the fuel tank is as shown in FIG. 2 before the operation lever 23 is operated, and the valve body 19 is the first seat of the valve seat member 18. The automatic valve 34 is seated on the valve seat portion 18A
Seated on the valve seat portion 18B.

Next, the connecting lever 2 is rotated by rotating the operating lever 23 in the direction of arrow A in order to refuel the tank.
The valve shaft 22 is displaced in the direction of the arrow B via 4. As a result, as shown in FIG. 3, the valve body 19 is separated from the valve seat member 18, and the automatic valve 34 also resists the urging force of the spring 35 due to the pressure of the oil liquid in the oil passage 16. The fuel tank is separated from the seat portion 18B and the oil liquid is supplied to the fuel tank through the discharge pipe 17.

At this time, the air in the intake passage 45 is sucked by the Venturi action due to the discharge pressure of the oil liquid, and the annular ventilation passage 43, the suction pipe passage 42, and the negative pressure pipe 40.
The air is sucked through the air passage 44 and the air is sucked from the negative pressure chamber 28 of the automatic valve closing mechanism 25 through the air passage 44. However, during refueling, the discharge port 17 of the discharge pipe 17 is
Since A is open to the atmosphere, the discharge port 17A of the discharge pipe 17 and the negative pressure chamber 28 of the automatic valve closing mechanism 25 communicate with each other,
The negative pressure chamber 28 is in the atmospheric state. As a result, the automatic valve closing mechanism 25 does not operate and the refueling work is continued.

Then, the refueling work progresses and the discharge pipe 1
When the liquid level rises to the position of the discharge port 17A of No. 7 and the bubble / liquid detection unit 41 is closed, the air sucked through the negative pressure pipe 40, the suction pipe line 42, and the annular air passage 43 is sucked. Then, the air is sucked from the negative pressure chamber 28 of the automatic valve closing mechanism 25 through the ventilation passage 44, and the diaphragm 26
To perform the automatic valve closing operation, the valve shaft 22 is moved in the direction opposite to the arrow B direction, and the valve body 19 is seated on the valve seat member 18 by the valve shaft 22 so that the oil passage 16 and the discharge pipe 17 communicate with each other. Shut off and stop refueling work.

Next, the features of this embodiment will be described with reference to FIG.

As described above, an external force acts on the discharge pipe 17 when the vehicle starts running while the discharge pipe 17 of the fuel nozzle 10 is still inserted in the fuel inlet of the fuel tank of the vehicle during the refueling operation. The fragile portion 37 formed in the connection port member 32 of the nozzle body 11 is broken. Due to the breakage of the fragile portion 37, the negative pressure pipe 40 and the spring 35 provided in the discharge pipe 17 are detached from the nozzle body 11, and the detachment of the spring 35 causes the automatic valve 34 to move to the weak spring 36.
The annular valve body portion 34C is seated on the safety valve seat 38 via the seal member 39 by the urging force of the oil passage to prevent the oil liquid from leaking from the oil passage 16 to the outside. .

When the automatic valve 34 is seated on the safety valve seat 38, the valve shaft 34A closes the suction conduit 42 formed in the connection port member 32, so that the oil liquid in the oil passage 16 is sucked. Passage 45, annular ventilation passage 43 and suction pipe 42
It is prohibited to discharge to the outside via the valve support portion 32C.

Thus, in this embodiment, the fragile portion 37 that breaks when an external force acts on the discharge pipe 17 is formed in the pipe mounting portion 32A of the connection port member 32 that connects the nozzle body 11 and the discharge pipe 17. In addition, when the fragile portion 37 is broken, the annular valve main portion 34C of the automatic valve 34
And a valve shaft 3 of the automatic valve 34 for safety
The suction pipe line 42 forming the negative pressure generating portion of the air suction passage is closed by 4A. As a result, when a force acts on the discharge pipe 17 from the outside and the fragile portion 37 is broken, the automatic valve 34 is immediately seated on the safety valve seat 38 and the outflow of the oil liquid from the oil passage 16 is prohibited. At the same time, the valve shaft 34A can prevent the oil liquid from leaking from the air suction passage. Therefore, it is possible to prohibit the oil liquid from leaking immediately after the discharge pipe 17 comes off the nozzle body 11. Since the automatic valve 34 is biased by the weak spring 36, it is possible to stop the pump in the main body of the oil supply device and prevent the liquid from dripping even if the hydraulic pressure stops working.

Further, since the fragile portion 37 is formed on the connection port member 32 having a diameter larger than that of the discharge pipe 17, the discharge pipe 17 is still inserted in the fuel filler port of the fuel tank.
It is possible to prevent the broken discharge pipe 17 from entering the fuel tank through the fuel filler port when the vehicle travels.

In this embodiment, since the fueling nozzle having the safety device is constructed with a simple structure, it is necessary to provide the safety joint device between the fueling nozzle 10 and the fueling hose H as in the prior art. Therefore, it is possible to reliably prevent the oil liquid from leaking in an emergency when the discharge pipe 17 comes off without lowering workability such as refueling work, and it is possible to improve safety.

Further, since only the fragile portion 37 is broken and only the connection port member 32 is replaced, the repair cost can be reduced significantly as compared with the prior art.

Further, even if the vehicle runs away with the discharge pipe 17 inserted into the fuel filler port of the fuel tank of the vehicle, the parts to be replaced are the connection port member 32 and the discharge pipe 1.
7, it is sufficient to replace the negative pressure pipe 40 and the spring 35,
Even in this case, the repair cost can be reduced as compared with the conventional technique.
Also, the repair time can be shortened.

Next, the second embodiment will be described with reference to FIGS. 5 and 6. The feature of this embodiment is that the safety valve seat of the connection port member formed in the first embodiment is eliminated, The automatic valve closing mechanism prevents the oil liquid from leaking. 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 drawing, reference numeral 51 denotes a connection port member according to this embodiment, which is substantially the same as the connection port member 32 described in the first embodiment. A cylindrical valve support portion 51C formed in a double-cylinder shape fixed to the main body 11, the outer cylinder serves as a pipe mounting portion 51A to which the discharge pipe 17 is connected, and the inner peripheral side is formed via a leg portion 51B. A valve shaft 34A of the automatic valve 34 is slidably inserted in the.

Reference numeral 52 denotes a fragile portion formed on the outer peripheral surface of the pipe mounting portion 51A of the connection port member 51 over the entire circumference thereof. The fragile portion 52 is attached to the pipe when the external force acts on the discharge pipe 17. The portion 51A is easily broken.

Reference numeral 53 indicates a suction pipe line, and the suction pipe line 53 is formed in the leg portion 51B of the connection port member 51 obliquely in the radial direction.

In the refueling nozzle of this embodiment constructed as above, the vehicle starts running while the discharge pipe 17 of the refueling nozzle 10 is still inserted into the refueling port of the fuel tank of the vehicle during the refueling operation. When it does, the fragile portion 37 is broken. Due to the breakage of the fragile portion 37, the discharge pipe 17
The negative pressure tube 40 and the spring 35 provided in the nozzle are separated from the nozzle body 11. When the spring 35 is removed, the automatic valve 34 is moved forward by the urging force of the weak spring 36, and the valve shaft 34A closes the suction conduit 53 formed in the connection port member 51.

Thus, by prohibiting the suction of air from the suction pipe line 53, a pseudo full tank (the discharge pipe 17
(The liquid surface has reached the discharge port 17A of the), the air is sucked from the negative pressure chamber 28 of the automatic valve closing mechanism 25 through the ventilation passage 44, the automatic valve closing mechanism 25 is operated, and the valve shaft 22 is opened. The valve body 19 is moved to the front side, and the valve body 19 is seated on the first valve seat portion 18A of the valve seat member 18 to prevent the oil liquid from leaking from the oil passage 16.

Also in the oil supply nozzle in this embodiment,
It is possible to obtain the same effect as that of the first embodiment described above.

Next, the third embodiment will be described with reference to FIGS. 7 and 8. The feature of this embodiment is that in a fueling nozzle in which the nozzle body is not provided with an automatic valve closing mechanism, a fragile part and a safety part are used. The valve seat was formed. 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 a discharge pipe according to this embodiment, which is connected to the nozzle body 11 by a connection port member 32, and a spring 35 is urged to the automatic pipe 34 side in the discharge pipe 61. In order to do so, a substantially L-shaped spring receiver 62 is provided so as to project.

Here, the spring receiver 62 has a leg portion 62A and a columnar spring holding portion 6 provided on the leg portion 62A so as to project rearward.
2B, and the spring holding portion 62B is connected to the connection port member 32.
Is inserted from the front of the valve support portion 32C of the
A spring 35 is held in C.

In this embodiment, unlike the oil supply nozzle described in the first embodiment, since the automatic valve closing mechanism is not provided, there is an air suction passage for making the automatic valve closing mechanism suck air. The negative pressure pipe 40, the suction pipe line 42, the annular ventilation passage 43, the ventilation passage 44, and the intake passage 45 are not formed.

Thus, also in this embodiment, when the external force during refueling acts on the discharge pipe 61, the fragile portion 37 is broken, and the spring receiver 62 together with the discharge pipe 61 makes the nozzle body 11.
And the spring 35 disengages. As a result, similarly to the first embodiment, the automatic valve 34 immediately seats on the safety valve seat 38, and the outflow of oil liquid from the oil passage 16 is prohibited.

Therefore, although the same effects as those of the first embodiment described above can be obtained, this embodiment is particularly suitable when applied to a fueling nozzle of a type that does not have an automatic valve closing mechanism.

In each of the above embodiments, the connection port member 32 is used.
Although the weak portion 37 (52) is formed in (51), the present invention is not limited to this, and the weak portion may be formed in the discharge pipe 17 (61).

The automatic valve 34 has a discharge pipe 17 (6
Although the weak spring 36 that urges toward the 1) side is provided, the weak spring 36 may be omitted and the weak spring 36 may be moved to the discharge pipe 17 (61) side by the discharge pressure of the oil liquid.

On the other hand, although the automatic valve 34 is provided in the nozzle body 11 in each of the above embodiments, the present invention is not limited to this, and the automatic valve 34 may be provided in the discharge pipe 17 (61).

Further, although the intake passage 45 serving as the negative pressure generating portion is formed in the valve seat member 18, the present invention is not limited to this, and as shown in, for example, Japanese Patent Laid-Open No. 51-91011, It may be applied to a fueling nozzle in which a negative pressure generating portion is formed near the valve.

[0063]

As described in detail above, according to the first aspect of the invention, in the fueling nozzle having the automatic valve closing mechanism, the fragile portion is provided in the vicinity of the connecting portion between the nozzle body and the discharge pipe, and the external force is applied to the discharge pipe. When the fragile part is broken due to the action of the fragile part, a safety valve seat is provided upstream of the fragile part where the automatic valve is seated so as to close the flow path, and the automatic valve is seated on the safety valve seat. Since the valve shaft that closes the negative pressure generating portion side of the air suction flow path is provided in the automatic valve at this time, when the vehicle starts traveling during the refueling work, it is broken at the fragile portion, The automatic valve is seated on the safety valve seat to close the flow path, and the air suction flow path is closed by the valve shaft of the automatic valve to prevent the oil liquid from leaking from the air suction flow path. To prevent the oil from leaking and improve the safety of the refueling nozzle. Furthermore, only the portion where the fragile portion of the nozzle body is formed is damaged, and since only this portion needs to be replaced, the repair cost can be reduced and the repair time can be shortened.

According to the second aspect of the invention, in the fueling nozzle provided with the automatic valve closing mechanism, the fragile portion is provided near the connecting portion between the nozzle body and the discharge pipe, and the fragile portion is broken in the automatic valve. At this time, since the valve shaft that closes the air suction flow passage is provided to operate the automatic valve closing mechanism, if the breakage occurs at the fragile portion, the negative pressure generating portion side of the air suction flow passage is set to the automatic valve. The valve shaft closes, the automatic valve closing mechanism is activated, and the valve body closes the flow path to prevent the oil liquid from leaking.

Further, according to the third aspect of the invention, in the fueling nozzle without the automatic valve closing mechanism, the fragile portion is provided in the vicinity of the connecting portion between the nozzle body and the discharge pipe, and when the fragile portion is broken, the flow passage is formed. Since the safety valve seat that seats the automatic valve so as to close the valve is provided on the upstream side of the fragile part, if the fragile part is broken, the automatic valve is seated on the safety valve seat to block the flow path. By doing so, the leakage of the oil liquid is prevented and the safety of the oil supply nozzle is enhanced.

[Brief description of drawings]

FIG. 1 is a side view showing a fueling nozzle according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view as seen from the direction of arrows II-II in FIG.

3 is a cross-sectional view showing an enlarged main part in FIG.

FIG. 4 is a cross-sectional view at the same position as in FIG. 3, showing a state in which a fragile portion according to the first embodiment is broken.

FIG. 5 is an enlarged sectional view showing a main part of a fueling nozzle according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view at the same position as in FIG. 5, showing a state when the fragile portion according to the second embodiment is broken.

FIG. 7 is an enlarged sectional view showing a main part of an oil supply nozzle according to a third embodiment of the present invention.

FIG. 8 is a sectional view at the same position as in FIG. 7, showing a state in which a fragile portion according to the third embodiment is broken.

[Explanation of symbols]

 10 Oil Supply Nozzle 11 Nozzle Main Body 16 Oil Passage (Flow Path) 17,61 Discharge Pipe 17A Discharge Port 19 Valve Body 23 Operation Lever 25 Automatic Valve Closing Mechanism 32,51 Connection Port Member 34 Automatic Valve 34A Valve Shaft 37,52 Weak Section 38 Safety valve seat 40 Negative pressure pipe 41 Bubble / liquid detection unit 42 Suction pipe line 43 Annular ventilation passage 44 Ventilation passage 45 Intake passage (negative pressure generation unit)

Claims (3)

[Claims] 1. A nozzle main body having a flow passage therein, a discharge pipe provided in the nozzle main body, a valve body provided in the nozzle main body to open and close the flow passage, and the valve body. ，
An operating lever to be closed, and an automatic valve closing device that closes the valve body when the bubble / liquid detection unit provided at the tip of the discharge pipe is closed in a state where the valve body is opened by the operating lever. A mechanism, an automatic valve that is provided in the vicinity of the connection between the nozzle body and the discharge pipe, normally sits on the valve seat and closes, and receives pressure from the oil flow to open the valve. In a fueling nozzle in which a negative pressure generating unit that generates a negative pressure is composed of the bubble / liquid detecting unit and an air suction flow path communicating with an automatic valve closing mechanism, a discharge pipe is provided near a connecting portion between the nozzle body and the discharge pipe. A fragile portion that breaks when an external force is applied to is provided, and a safety valve seat on which the automatic valve is seated is provided upstream of the fragile portion so that the flow passage is closed when the fragile portion is broken. , And when the automatic valve is seated on the safety valve seat, the air Fueling nozzle, characterized in that a valve stem for closing the negative pressure generation part of the 引流 path. 2. A nozzle main body having a flow passage therein, a discharge pipe provided in the nozzle main body, a valve body provided in the nozzle main body for opening and closing the flow passage, and the valve body being opened. ，
An operating lever to be closed, and an automatic valve closing device that closes the valve body when the bubble / liquid detection unit provided at the tip of the discharge pipe is closed in a state where the valve body is opened by the operating lever. A mechanism, an automatic valve that is provided in the vicinity of the connection between the nozzle body and the discharge pipe, normally sits on the valve seat and closes, and receives pressure from the oil flow to open the valve. In a fueling nozzle in which a negative pressure generating unit that generates a negative pressure is composed of the bubble / liquid detecting unit and an air suction flow path communicating with an automatic valve closing mechanism, a discharge pipe is provided near a connecting portion between the nozzle body and the discharge pipe. Is provided with a fragile portion that is broken when an external force is applied, and the automatic valve closes the negative pressure generating portion side of the air suction flow passage so as to operate the automatic valve closing mechanism when the fragile portion is broken. A refueling nozzle having a valve shaft. 3. A nozzle main body having a flow passage therein, a discharge pipe provided in the nozzle main body, a valve body provided in the nozzle main body for opening and closing the flow passage, and the valve body being opened. ，
It consists of an operating lever that closes and an automatic valve that is provided near the connection between the nozzle body and the discharge pipe and normally sits on a valve seat to close the valve and receives pressure from the oil flow to open the valve. In the fueling nozzle, a fragile portion that breaks when an external force is applied to the discharge pipe is provided in the vicinity of the connecting portion between the nozzle body and the discharge pipe, and the automatic passage is closed so that the flow passage is closed when the fragile portion is broken. A refueling nozzle characterized in that a safety valve seat on which a valve is seated is provided upstream of the fragile portion.