JPH08230999A - Fuel nozzle - Google Patents

Abstract

PURPOSE: To easily set the flow rate in three steps, high, mean and low, by a method wherein a shaft is provided as a movement restriction member that stops at a lever stop position following the movement of a lever and restricts the movement of a main valve, and the displacements of the lever and the shaft are freely set. CONSTITUTION: When a lever 11 is pulled up during fueling, a rod 22 is pushed up and a valve stem 21 is pushed up by a clutch pin 18, causing a small valve 10 to open a discharge path 9. Thereby, fuel flows into a liquid pressure chamber 7 from a flow path 5a on the upstream side of a main valve 6 through an influent path 8. The main valve 6 is lifted by the pressure of liquid on the upstream side of the main valve 6 and comes in contact with the lower end of the shaft 24. Receiving the liquid pressure in the opening direction, the main valve 6 helps the lever 11 to move up and open the flow path 5 full. When the main valve 6 is not opened full but kept in a small or medium opening state to supply fuel, the lever 11 is pulled up to a low flow rate fueling position to set the end of the lever 11 at the low flow rate fueling position on the lower step of a latch 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fueling nozzle of a fueling device installed in a gasoline service station or the like.

[0002]

2. Description of the Related Art In such a fueling nozzle, a main valve is provided in a flow passage formed in, for example, a main body casing, and a fluid pressure chamber for opening and closing the main valve and a flow passage upstream of the main valve are provided in the main valve. Through a flow path, the hydraulic chamber and the flow path on the downstream side of the main valve are connected by an outflow path having a diameter larger than the inflow path, and a small valve is provided in the outflow path, and the valve rod of the small valve is in the fuel tank. Is connected to the lever via a conventionally known automatic closing mechanism that closes the small valve when the tank is full.

When refueling, the small valve is opened by pulling up the lever through the automatic closing mechanism to reduce the hydraulic pressure in the hydraulic chamber, and the main valve is opened by the hydraulic pressure on the upstream side of the main valve. To open the flow path. When the tank is full and the automatic closing mechanism operates, the small valve closes and the main valve closes due to the increase in the hydraulic pressure in the hydraulic chamber, and the flow of liquid stops.

[0004]

In order to open the main valve, a small valve is opened to reduce the hydraulic pressure in the hydraulic chamber and the main valve is moved by the hydraulic pressure, but it is operated by a lever. Since there is only a small valve, the main valve was either completely opened or closed, and it was not possible to set the flow rate such as small flow and middle flow.

An object of the present invention is to solve the above-mentioned disadvantages of the conventional example and to provide an oil supply nozzle which can easily and surely set the flow rate of not only a large flow but also a small flow and a middle flow.

[0006]

In order to achieve the above-mentioned object, the present invention provides a main valve in a flow passage formed in a main body casing, and a hydraulic chamber for opening and closing the main valve and a flow on the upstream side of the main valve. The main chamber with an inflow passage, the hydraulic chamber communicates with the flow passage on the downstream side of the main valve with an outflow passage having a diameter larger than the inflow passage, and a small valve is provided in the outflow passage. A movement restricting member in which a lever pivotally attached by a pin is engaged with a valve rod for opening and closing the small valve, and the upper end is urged in the closing direction of the main valve by a spring with its upper end abutting against the main valve. Is provided and the opening degree of the main valve is determined and regulated in accordance with the movement amount of the lever.

Further, a movement limiting member is loosely fitted to the lever, and a spring urged by an elastic force larger than the moving force in the valve opening direction of the main valve due to hydraulic pressure is attached to the movement limiting member for movement. The gist is that there is a play gap between the restricting member and the main valve.

Further, a rod is connected to a valve rod provided on the small valve via a clutch that is engaged and disengaged by a diaphragm of an automatic closing mechanism, and the rod is brought into contact with a lever to open and close the small valve. The lever engages with the pivot point side, the movement restricting member that limits the opening and closing of the main valve engages with the lever action point side, and the lever action point side locks with the body casing. The gist is to provide a latch for

[0009]

According to the present invention as set forth in claim 1, when the pump is turned on, the hydraulic pressure in the hydraulic chamber rises, and when the lever is pulled up at the start of refueling, the small valve opens and the liquid enters the hydraulic chamber from the inflow passage. A larger amount of liquid than the amount flows out from the outflow passage, and the hydraulic pressure in the hydraulic chamber decreases. As a result, hydraulic pressure is applied to the main valve in the opening direction, and the main valve is moved in the direction of the hydraulic chamber by the amount of the movement of the lever to open.

According to the second aspect of the present invention, in addition to the above action, a force in the closing direction is urged by the spring to the movement restricting member that regulates the main valve, and the urging force is mainly due to the hydraulic pressure. Since it is larger than the moving force of the valve in the opening direction, the main valve also moves and opens by the amount of movement of the movement limiting member moved by pulling up the lever, and it moves to this position without pushing the movement limiting member further by hydraulic pressure. Retained.

According to the third aspect of the present invention, in addition to the above action, the play formed between the movement limiting member and the lever causes the movement limiting member to be pulled up more than when the lever is pulled up. First, the small valve opens. Therefore,
Since the fluid pressure in the fluid pressure chamber decreases, fluid pressure is applied to the main valve in the direction of raising it, which assists in pulling up the lever and allows the lever to be pulled up smoothly.

According to the fourth aspect of the present invention, in addition to the above-mentioned action, when the diaphragm is moved upon detection of full tank, the clutch is disengaged so that the rod remains in the same position and the lever does not return. , The rod is disengaged and the valve rod returns to its original position, and as a result, the small valve is closed.
This closes the outflow passage, increasing the hydraulic pressure in the hydraulic chamber,
This hydraulic pressure pushes down the main valve to close it.

According to the fifth aspect of the present invention, in addition to the above action, both the small valve and the main valve are opened and closed by the lever, but the opening degree of the main valve can take a larger range than the small valve. It becomes easy to adjust the flow rate.

According to the sixth aspect of the present invention, in addition to the above action, by locking the action point side of the lever with a latch, after the opening is set, the hand can be released to refuel.

[0015]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a vertical side view of a fueling nozzle according to the present invention, FIG. 2 is a transverse plan view of the same, in which 1 is a main casing, 2 is a discharge pipe attached to the tip of the main casing 1 via a connecting fitting 4, 3 Is a refueling hose attached to the other end of the main body casing, and a main valve 6 using a hydraulic valve that opens and closes depending on the hydraulic pressure of the hydraulic chamber 7 is provided in the flow path 5 formed in the main body casing 1 and communicating with the refueling hose 3. . The upstream and downstream channels of the main valve 6 are designated as 5a and 5b, respectively. Reference numeral 12 in the drawing denotes a check valve provided on the connection fitting 4 at the tip of the flow path 5.

An inflow passage 8 is formed in the main valve 6, one end of which is open to the flow passage 5a on the upstream side of the main valve 6 and the other end of which is open to the hydraulic chamber 7. The inflow passage 8 is located upstream of the main valve 6. Side flow path 5a and hydraulic chamber 7
The main casing 1 is provided with an outflow passage 9 which communicates with the fluid pressure chamber 7 and the fluid passage 5b on the downstream side of the main valve 6. The outflow passage 9 is formed to have a larger diameter than the inflow passage 8, a small valve 10 is provided in the outflow passage 9, and a lever for opening and closing the small valve 10 and the main valve 6.
One end of 11 is pivotally attached to the body casing 1 by a pin 28.

Next, the opening / closing mechanism of the small valve 10 and the main valve 6 will be described. The small valve 10 is opened and closed by a conventionally known automatic closing mechanism. The automatic closing mechanism is provided with a liquid level detecting pipe 13 inside the discharge pipe 2, and detects the liquid level at the tip of the liquid level detecting pipe 13. The port 14 was opened at the tip side of the discharge pipe 2, and the other end of the liquid level detection pipe 13 was connected to the conduit 15 communicating with the diaphragm chamber 16 via the negative pressure generating portion 29 of the check valve 12. A diaphragm 17 equipped with a spring 19 is provided in the diaphragm chamber 16,
A clutch pin 18 is connected to the diaphragm 17.

On the other hand, the spring 20 biased in the closing direction was mounted on the valve rod 21 of the small valve 10. Then, the spring 23 that urges in the valve closing direction
The rod 22 is movably attached to the valve rod 21 through the lever 22, the lower end of the rod 22 is brought into contact with the lever 11, and the clutch pin 18 is detachably locked on the upper portion so as to move integrally with the valve rod 21. .

The opening / closing mechanism of the main valve 6 is a shaft which is a movement limiting member in which a spring 25 for urging the main valve 6 in the valve closing direction is mounted.
The lower end of 24 is releasably brought into contact with the upper part of the main valve 6, and the lever 11
Is loosely fitted in a long hole 26 formed in the middle of the shaft 24 so that there is play. In this case, the elasticity of the spring 25 is 6
It is set to be larger than the rising force due to the hydraulic pressure applied to.
Further, the lower end of the shaft 24 and the upper part of the main valve 6 are set so that a slight gap is generated in the valve closed state.

The body casing 1 is provided with a lever 11
A plurality of latches 27 for locking the end on the side of the action point are provided depending on the magnitude of the flow rate.

Next, usage and operation will be described. When not refueling, both the main valve 6 and the small valve 10 are closed as shown in FIG. 1, and there is some clearance between the main valve 6 and the shaft 24. Further, the clutch pin 18 is locked to the rod 22 and the valve rod 21. In order to refuel under this condition, the lever
When the lever 11 is pulled up, the lever 11 pushes up the rod 22, and the valve rod 21 that is locked to this via the clutch pin 18 is also a spring.
Pushed up against the elasticity of 20, the small valve 10 opens and the outflow passage 9 opens.

At this time, since there is looseness in the long hole 26 in which the lever 11 is loosely fitted, if the lever 11 is slightly pulled up, the lever 11 will move inside the long hole 26, and the shaft 24 will move. Cannot be raised.

When the outflow passage 9 is opened, oil enters the hydraulic chamber 7 from the upstream passage 5a of the main valve 6 through the inflow passage 8 opened upstream of the main valve 6. Since the outflow passage 9 is formed to have a larger diameter than the inflow passage 8, the amount of oil flowing out of the hydraulic chamber 7 via the outflow passage 9 is larger. As a result, the hydraulic pressure in the hydraulic chamber 7 is reduced, and the hydraulic pressure on the upstream side of the main valve 6 exerts a rising force on the main valve 6, which raises the main valve 6 and the shaft 24.
Touch the bottom edge of.

In this way, the main valve 6 receives hydraulic pressure in the opening direction, assists in raising the lever, the lever is smoothly pulled up, the flow path 5 is completely opened, and oil is pushed down the check valve 12 while the discharge pipe 2 is being pushed down. Into the tank of the automobile. At this time, negative pressure is generated in the liquid level detection pipe 13 and the conduit 15 due to the Venturi effect generated in the negative pressure generation unit 29, but since the liquid level detection port 14 is in the atmosphere, the air sucked from here is negative pressure. Negative pressure does not occur in the diaphragm chamber 16 of the automatic valve closing mechanism because it flows into the generating unit 29.

When the tank is full, the liquid level is the liquid level detection port 14
When this is reached and closed, the liquid level detection tube 13 and the conduit 15 are disconnected from the atmosphere, and the diaphragm chamber 16 becomes negative pressure,
The diaphragm 17 moves against the elastic force of the spring 19, and as a result, the engagement between the rod 22 and the valve rod 21 by the clutch pin 18 is released.

Thus, as shown in FIG. 4, the lever 11
The rod 22 pushed directly into contact with is kept at the present position, and only the valve rod 21 is pushed down by the elasticity of the spring 20, and the small valve 10 closes the outflow passage 9.

At this time, the main valve 6 is still in the raised position,
Oil continues to flow into the hydraulic chamber 7 via the inflow passage 8, but the hydraulic pressure in the hydraulic chamber 7 increases due to the closing of the outflow passage 9, and this hydraulic pressure pushes down the main valve 6, Channel 5
Close. Then, if the lever 11 is removed from the latch 27, the elasticity of the springs 23 and 25 together with the rod 22 and the shaft 24
11, the clutch pin 18 is re-engaged with the rod 22 and the valve rod 21 as the rod 22 descends.

Next, a description will be given of a case where the main valve 6 is not fully opened as described above, but oil is supplied in a small open state or an intermediate open state.

Similar to the case of refueling in the fully opened state, the lever 11 is pulled up, the small valve 10 is opened to reduce the hydraulic pressure in the hydraulic chamber 7, and the main valve 6 is given a hydraulic pressure in the upward direction. , The lever 11 is pulled up, and the lever 11 is pulled up to the setting position for small amount refueling as shown in FIG. 5, and the end of the lever 11 is locked at the lower amount refueling position of the lower stage of the latch 27.

In this state, the shaft 24 also moves by the amount of movement of the lever 11, the shaft 24 is also stopped at that position by the locking of the lever 11, and the position of the shaft 24 is regulated by the lever 11. Since the amount of rise of the main valve 6 is restricted by the amount of movement of the shaft 24 and rises only by the amount of movement of the shaft 24, the valve opening is small and is determined by the amount of movement of the lever 11 and the shaft 24. A small opening is maintained.

Further, the elasticity of the spring 25 is the main valve 6 by the hydraulic pressure.
Since it is set to be larger than the rising force of, the main valve 6 does not push up the shaft 24 and the lever 11 by hydraulic pressure against the elasticity of the spring 25, and the shaft 24 and the lever 11 are locked at the small oil supply position. The small opening is maintained.

When the tank is full and the liquid level detection port 14 is closed with oil, as in the case of full open oil supply, the diaphragm
17 moves, the clutch pin 18 disengages, the valve rod 21 descends, the small valve 10 closes, and the hydraulic pressure in the hydraulic chamber 7 decreases. This allows
The main valve 6 closes.

[0033]

As described above, the oil supply nozzle of the present invention is provided with the shaft which is the movement restricting member which stops at the lever locking position following the movement of the lever, and the movement of the main valve is restricted by this shaft. Therefore, if the amount of movement of the lever and shaft is set, the main valve also moves by this amount of movement, and further movement is blocked, so not only large flow but also small flow, medium flow, etc. Settings are easy and reliable.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a fueling nozzle of the present invention.

FIG. 2 is a cross-sectional plan view showing an embodiment of the oil supply nozzle of the present invention.

FIG. 3 is a vertical cross-sectional side view of a main part of a fueling nozzle according to an embodiment of the present invention in a fully opened state.

FIG. 4 is a vertical cross-sectional side view of an essential part of an embodiment of a fueling nozzle of the present invention at the time of automatic closing.

FIG. 5 is a vertical cross-sectional side view of a main part in a small open state showing an embodiment of a fueling nozzle of the present invention.

[Explanation of symbols]

 1 ... Main body casing 2 ... Discharge pipe 3 ... Refueling hose 4 ... Connection fittings 5, 5a, 5b ... Flow path 6 ... Main valve 7 ... Hydraulic chamber 8 ... Inflow path 9 ... Outflow path 10 ... Small valve 11 ... Lever 12 ... Check valve 13… Liquid level detection pipe 14… Liquid level detection port 15… Conduit 16… Diaphragm chamber 17… Diaphragm 18… Clutch pin 19… Spring 20… Spring 21… Valve rod 22… Rod 23… Spring 24… Shaft 25… Spring 26 ... Long hole 27 ... Latch 28 ... Pin 29 ... Negative pressure generating part

Claims (6)

[Claims] 1. A main valve is provided in a flow passage formed in a main body casing, and a fluid pressure chamber for opening and closing the main valve and a flow passage upstream of the main valve are communicated with each other through an inflow passage provided in the main valve. A valve that communicates the pressure chamber with a flow path on the downstream side of the main valve through an outflow passage having a diameter larger than that of the inflow passage, has a small valve in the outflow passage, and opens and closes the small valve with a lever pivotally attached at one end by a pin. A movement limiting member is provided that engages with the rod and moves with the lever, the upper end is urged by the spring in the closing direction of the main valve, and the lower end contacts the main valve. A refueling nozzle whose degree is regulated. 2. The oil supply nozzle according to claim 1, wherein the movement restricting member is provided with a spring urged by an elastic force larger than a moving force of the main valve in the valve opening direction due to hydraulic pressure. 3. The oil supply nozzle according to claim 1, wherein a movement restricting member is loosely fitted to the lever, and a play gap is present between the movement restricting member and the main valve. 4. A refueling nozzle according to claim 1, wherein a rod is connected to a valve rod provided on the small valve via a clutch that engages and disengages with a diaphragm of an automatic closing mechanism, and the rod abuts against a lever. 5. A valve rod for opening and closing a small valve and a lever engage with each other at a pivot point of the lever, and a movement limiting member for limiting opening and closing of the main valve engages with a lever at an action point side of the lever. The refueling nozzle according to claim 1. 6. The refueling nozzle according to claim 1, wherein the main body casing is provided with a latch for locking the action point side of the lever.