JPS6213998Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a refueling device that measures oil pumped from an oil storage tank with a flowmeter and supplies it to a fuel tank of an automobile, etc. via a hose and a refueling nozzle. .

When a car runs, static electricity is generated by the friction between the car body and the air and the shaking of oil in the fuel tank, but since the car body is insulated from the ground by the tires, the generated static electricity accumulates in the car body. has been done. When refueling such an automobile with the above-mentioned refueling device, when the refueling nozzle is inserted into the refueling port of the automobile, static electricity accumulated in the vehicle body is supposed to be grounded through the nozzle. However, in this case, the removal of static electricity by grounding is not done instantaneously, but is done gradually over a certain period of time, so if the nozzle and the vehicle body (fuel filler port) are intermittently in contact during this time, electrical sparks are generated and the oil There is a high risk of the vapors igniting and causing an explosion.

To prevent this kind of danger, for example, as shown in Figure 8, the pipe at the end of the refueling nozzle is
It is conceivable to provide a contact member S having elasticity and conductivity in a protruding manner on N' so that the contact member S comes into contact with the oil filler pipe P when the barrel pipe is inserted into the filler port H. However, this configuration is not useful if the tip pipe N' or the oil supply pipe P is an electrically insulating material.

The present invention has been proposed in view of the above points, and is designed to supply oil pumped from an oil storage tank to a fuel tank of an automobile, etc. via a flow meter, a hose, and a fuel nozzle, and the oil supply nozzle is In a refueling device having a built-in pressure-operated automatic valve closing mechanism, the refueling nozzle includes a conductive cable having one end conductively connected to the nozzle, and a conductive cable conductively connected to the other end of the refueling nozzle. A conductive mechanism is provided, which includes a conductive attachment member that can be conductively attached to a conductive portion, and a holding portion that holds this attachment member, and is grounded through the nozzle, and the attachment member is As long as the valve is held in the holding portion, the negative pressure operated automatic valve closing mechanism is maintained in the valve closing state, thereby disabling oil supply from the nozzle.

The illustrated embodiment will be described in detail below.

In Figure 1, 1 is the housing of the refueling machine installed above ground G at the gas station, 2 is the underground oil storage tank,
3 is an oil pipe, 4 is a pump, 5 is a pump motor,
6 is a flow meter, 7 is a refueling amount indicator, and 8 is a refueling hose, the tip of which is connected to a refueling nozzle N.

FIG. 2 is a detailed diagram of the refueling nozzle N, in which 10 is a flow path passing through the nozzle, 11 is a main valve that opens and closes the flow path 10, 12 is an operating lever that opens the main valve 11, and 13 is a device related to the operating lever 12. Negative pressure operated automatic valve closing mechanism (so-called auto-stop mechanism), 14
is an auxiliary valve installed downstream of the main valve 11 in the flow path 10, and is used to close the valve of the auto-stop mechanism 13 by forming a narrowed portion 10' in the flow path to prevent oil from dripping as described later. This is to generate the negative pressure necessary for operation.

As is well known, the main valve 1 is controlled by the operation lever 12.
When 1 is opened, the oil flowing through the flow path 10 causes the auxiliary valve 1 to open.
4 is pushed open, resulting in a narrowed part 1
0', oil is discharged from the tube end pipe N'.
Negative pressure is generated in the negative pressure chamber 15 of the auto-stop mechanism 13 via the air passage 16 by the oil flowing through the narrowed part 10', and one end of this negative pressure is opened at the tip of the nozzle tip pipe N'. However, the auto-stop mechanism 13 does not close the valve because it is compensated by the air sucked in from the tip opening 17' of the negative pressure compensation path 17 whose other end communicates with the air path 16.

When the oil level in the tank to be refueled rises due to refueling and closes the opening 17' of the negative pressure compensation path 17, the negative pressure chamber 15
The negative pressure inside is no longer compensated, and the auto-stop mechanism 13 operates to close the main valve 11.

Reference numeral 18 denotes a ground wire, one end of which is connected to the main body of the nozzle N, and the other end connected to the ground G.

Reference numeral 19 denotes a conductive mechanism according to the present invention, which includes a conductive cable 20 having one end conductively connected to a nozzle, and a conductive anchoring member 21 which is conductively connected to the other end of the cable and can be attached to the vehicle body B. It consists of a holding part 22 that holds this fastening member to the nozzle N when not in use.

In the embodiment shown in FIG. 2, the fastening member 21 consists of a conductive frame 23 and a magnet piece 24 fitted into the frame. The fastening member 21 is comprised of a clip 25 in the embodiment shown in FIG. 4, and a conductive contact piece 26 and a suction cup 27 made of an elastic material in the example shown in FIG. In addition,
28 is a spring.

When the nozzle N is not in use, the retaining member 21 is attached to the nozzle N.
In the example shown in FIG. 2, the holding portion 22 for holding the nozzle body consists of a reel mechanism attached to the upper part of the nozzle body. This reel mechanism consists of a reel 29 around which the cable 20 is wound, and a biasing mechanism 30 such as a spiral spring that constantly biases the reel 29 in the direction in which the cable 20 is wound. Note that the base end of the cable 20 wound around the reel 29 is electrically connected to the ground wire 18 via the nozzle body (which is conductive).

In FIGS. 2 and 3, 31 is a piston serving as a negative pressure compensation path opening/closing valve installed to open and close the aforementioned negative pressure compensation path 17, and 32 is a piston attached to a position where the negative pressure compensation path 17 is opened. In FIGS. 2 and 3, reference numeral 33 is a rocking piece provided on the piston 31, which is not engaged when the cable 20 is completely wound around the reel mechanism 22 when the engagement member 21 is not used. When the piston 31 is pushed clockwise by the fastening member 21 and the negative pressure compensation path 17 is closed, and the cable 20 is pulled out by holding the fastening member 21, the piston 31 is pushed up by the spring 32. to allow the negative pressure compensation path 17 to open.

In the above configuration, in the state shown in FIG. 2, that is, in the state where the conductive mechanism 19 is not operated and the negative pressure compensating path 17 is closed by the piston 31, the lever 12 is pulled and oil flows into the through-flow path 10. Even if the oil flows, the negative pressure generated in the negative pressure chamber 15 due to the oil flow is not compensated for, so the auto-stop mechanism 13 operates and the valve 11 is immediately closed.

Either hold the engaging member 21 of the conductive mechanism 19 by hand and pull out the cable 20 (FIG. 3), or
When the piston 31 is pulled away from the spring 3
2 to open the negative pressure compensation path 17, the auto-stop mechanism 13 operates normally.

The attachment member 24 is attached to the vehicle body B of the automobile by a magnet, a clip, or a suction cup to ground the static electricity of the vehicle body.

When refueling is finished, the engaging member 21 is removed from the vehicle body B. In FIGS. 2-3, the cable 20 is wound around the vehicle by a reel mechanism. In this case, winding may be performed by pressing the winding start button 36.

In the illustrated example, the nozzle has a negative pressure-operated auto-stop mechanism, but the present invention can be applied to a nozzle that has an auto-stop of other types.

Furthermore, it goes without saying that the present invention can be implemented not only in ground-mounted refueling systems but also in high-place refueling systems.

As described above, according to the present invention, it is possible to reliably ground the static electricity generated in the body of a vehicle, etc., and it is also possible to refuel without being grounded, making it possible to safely operate the nozzle. This is particularly effective in so-called self-service refueling systems where inexperienced customers perform refueling operations themselves.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of an embodiment of the present invention, Figure 2 is an enlarged vertical sectional view of the nozzle in Figure 1, and Figure 3 is a cross-sectional view of the nozzle in Figure 1.
Figures 4 and 5 are diagrams showing different operating states of some of the figures, Figures 4 and 5 are diagrams showing different configurations of the fastening members, and Figure 6 is a schematic diagram showing one method for grounding static electricity in the car body using a refueling nozzle. It is a diagram. B...Car body, N...Refueling nozzle,
N′...Nozzle tip pipe, H...Oil filler port, P...
... Oil supply pipe, S ... Elastic conductive contact piece, G ... Ground surface, 1 ... Oil feeder housing, 2 ... Oil storage tank, 6 ... Flow meter, 7 ... Display, 13 ... Negative pressure operated automatic Valve closing mechanism, 15... Negative pressure chamber, 17...
... Negative pressure compensation path, 18 ... Earth wire, 19 ... Conductive mechanism, 20 ... Conductive cable, 21 ... Attachment member,
22... Holding part, 23... Conductive frame, 24...
Magnet piece, 25... Clip, 27... Suction cup, 28
... Spring, 29 ... Reel, 30 ... Winding biasing mechanism, 31 ... Piston, 32 ... Spring, 33 ... Rocking piece.

Claims (1)

[Scope of Claim for Utility Model Registration] Oil pumped from an oil tank by a pump is supplied to a fuel tank of an automobile, etc. through a flow meter, a hose, and a fuel nozzle, and the fuel nozzle is operated by a manually operated lever. It has a built-in main valve that opens and closes and a negative pressure operated automatic valve closing mechanism, and this negative pressure operated automatic valve closing mechanism partitions a negative pressure chamber and assumes a position when negative pressure is generated and a position when non-negative pressure is generated. a diaphragm that can be operated, a displacement rod that is connected to the diaphragm and the manual operation lever, and a displacement rod that connects the negative pressure chamber to the atmosphere through an air suction port that opens outward at the tip of the pipe at the end of the refueling nozzle. and a negative pressure compensating path that communicates with the main valve, the displacement of the displacement rod is restricted when the diaphragm is in the non-negative pressure generation position, and the main valve can be opened by operating the manual operation lever; A lubrication device configured such that when a diaphragm is in a negative pressure generating position, it is freely displaceable and disables opening of the main valve by operating the manual operation lever, the diaphragm having one end connected to the lubrication nozzle. a conductive cable that is conductively connected to and grounded through the nozzle; a conductive anchoring member that is conductively connected to the other end of the cable and can be conductively attached to a conductive portion of a vehicle body such as the automobile; A holding part that is configured by a reel around which the cable is wound and a biasing mechanism that biases the reel in a winding direction of the cable, and that holds the engagement member when the engagement member is not in use. a negative pressure compensation path opening/closing valve for opening and closing the negative pressure compensation path of the negative pressure actuated automatic valve closing mechanism; and a negative pressure compensation path opening/closing valve placed in a position to open the negative pressure compensation path. a spring that biases the negative pressure compensation path, and a position where the negative pressure compensation path opening/closing valve closes the negative pressure compensation path against the spring by the engaging member held by the holding portion when not in use. A refueling device characterized in that the holding portion is disposed on the refueling nozzle so as to be held at the refueling nozzle.