JP2002046800A - Oil feed nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil feed nozzle which can prevent dropping from a feed port and can surely stop feeding. SOLUTION: An opening 12a for sensing a liquid level is formed on a tip side of a cylinder tip 12 provided on a cylinder barrel 11. An automatic valve closing mechanism 30 which activates with a negative pressure caused by sensing of the liquid level by the opening 12a applied is provided. In addition, a locking means 50 for keeping the cylinder tip 12 inserted into the feed port 1 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refueling nozzle for detecting a liquid level and automatically closing a main valve, and more particularly to an improved refueling nozzle for preventing a drop from a refueling port during refueling. .

[0002]

2. Description of the Related Art In a refueling station in recent years, only a refueling operation that involves a risk such as inserting a refueling nozzle of a refueling device into a refueling port of a vehicle at the start of refueling in a refueling area and hanging the refueling nozzle on the refueling device at the end of refueling. Workers go to the office with an identification card or the like after refueling, and payout is performed based on the identification card, thereby saving labor to minimize the number of workers. In such a refueling station, a worker performs refueling nozzles on and off a plurality of vehicles, and refueling control is performed by preset refueling based on an initial setting or an automatic valve closing mechanism that operates an automatic valve closing mechanism based on a liquid level rise. Refueling is performed by the refueling device. The present applicant has proposed, for example, in Japanese Unexamined Patent Application Publication No. 4-6093, a refueling nozzle that operates another automatic valve closing mechanism to stop refueling even if one automatic valve closing mechanism fails.

[0003]

The refueling can be stopped by refueling the fuel tank with the automatic refueling mechanism provided with the automatic valve closing mechanism described above, but the refueling nozzle cannot be completely inserted depending on the shape of the refueling port of the automobile. Or, when the morning and evening are busy, the refueling nozzle may not be sufficiently inserted, and may fall.

[0004] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a refueling nozzle capable of preventing a drop from a refueling port and reliably stopping refueling.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, an opening for detecting a liquid level is formed at a tip end of a cylinder tip provided in a cylinder body. An automatic valve closing mechanism that operates in response to a negative pressure effect generated by the liquid level detection at the opening, and a locking unit that holds a state in which the cylinder tip is inserted into a fuel filler port. Is what you do. The locking means can prevent the oil from dropping from the oil supply port, and can reliably stop the oil supply.

According to a second aspect of the present invention, the locking means is a magnet which is attracted to an oil supply port attached to the cylinder body side of the cylinder tip. By attracting the magnet to the filler port, it is possible to prevent the magnet from falling off the filler port.

[0007] The invention according to claim 3 is characterized in that the locking means is provided with a vent hole. The oil hole is not sealed by the ventilation hole.

In the invention according to a fourth aspect, the locking means is characterized in that a suction cup which is attached to a surface of a vehicle body around a fuel filler is attached to a cylinder body via a cord. Things. By adsorbing the suction cup on the surface of the vehicle body, it is possible to prevent the suction cup from dropping from the filler port.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. 1 to 4 are views for explaining a fueling nozzle according to an embodiment of the present invention. FIG. 1 is a side view showing the fueling nozzle in cross section, FIG. 2 is a plan view showing the fueling nozzle in cross section, and FIG. FIG. 4 is an enlarged plan view showing a cross-section of a valve closing mechanism portion of the nozzle, and FIG. 4 is a cross-sectional view taken along line AA of the fueling nozzle of FIG.

In these figures, a refueling nozzle 10 of the present embodiment has a cylinder tip 12 attached to a tip end of a cylinder body 11 having a grip portion 11a, and a lubrication device (not shown) is provided on a side surface of the cylinder body 11. The end of a refueling hose 13 communicating with the refueling mechanism is connected, and the flow path from the refueling hose 13 to the cylinder tip 12 is urged to always close the flow path by a spring 15 acting via a valve rod 14. The main valve 16 is arranged,
A push rod 17 is inserted through the shaft of the valve rod 14. The push rod 17 is in contact with the back surface of the push rod 17 so as to constantly bias the lever 19 forward by a spring 18 acting on the rear end thereof. By pulling, the push rod 17 is moved rightward in the figure against the spring 18, and the flow path is opened with the valve rod 14 connected thereto via a pin 40 described later. I have. An opening 12a for detecting the liquid level is formed in the vicinity of the tip of the cylinder tip 12, and an air flow pipe 21 having one end communicating with the opening 12a is inserted into the cylinder tip 12, and the air flow pipe is provided. The other end of 21 is communicated with a negative pressure generating section 23 of a check valve 22 provided in the cylinder body 11 and a negative pressure chamber 31 of an automatic valve closing mechanism 30 described later. Reference numeral 24 in the figure denotes a valve seat that the main valve 16 contacts to close the flow path.

As is well known, the automatic valve closing mechanism 30 closes the main valve 16 when the opening 12a facing the tip of the cylinder tip 12 of the air passage pipe 21 is closed by the liquid level in the tank. It works as follows. That is, the automatic valve closing mechanism 3
Numeral 0 is provided with a negative pressure chamber 31 communicating with the air flow path pipe 21, below which a main diaphragm 33 constantly urged downward by a spring 32 is stretched, and a pressing member of the main diaphragm 33 is provided. Post 35 formed on 34
The sub-diaphragm 38 has a slit formed in two places, and is always urged upward by a spring 37 seated on a spring seat 36 at the top, and the operation setting negative pressure is larger than the main diaphragm 33. A U-shaped piece 39 is fixed to the lower surface of the main diaphragm 33, and the U-shaped piece 39 is slidably inserted into an elongated hole formed in the piece 39.
By positioning the pin 40 in the notch 41 of the valve rod 14 and further engaging and disengaging the recess 42 of the push rod 17, the connection between the valve rod 14 and the push rod 17 can be achieved.
It is configured to separate. On the other hand, the struts 35 having the slits are provided with the levers 43 and 4 respectively.
3 are rotatably mounted by pins 44, and their inner ends act to push up a T-shaped center pin 45 erected at the center of the upper surface of the main diaphragm 33 from below. Further, a cylindrical pressing member 46 fixed to the center of the lower surface of the sub-diaphragm 38 presses the outer ends thereof. In the drawing, reference numeral 47 denotes a sub-diaphragm holding / cover, and 48 denotes an air hole formed in the cover 47.

Around the cylinder tip 12 on the tip end side of the cylinder body 11, a retaining portion 51 is provided as locking means for preventing the refueling nozzle 10 from dropping from the refueling port 1 of the vehicle during refueling.
The magnet 50 is attached via the. This holding part 51
Consists of a substantially annular member attached to the periphery of the tube tip 11, radially formed with a projection on the outer peripheral portion, and an annular magnet 50 is similarly attached around the projection. The magnet 50 is formed, for example, in such a size as to be attracted to the periphery of the fuel filler 1 of the automobile. The hole formed between the magnet 50 and the protrusion of the holding portion 51 forms a ventilation hole 52 for keeping the oil supply port from being closed.

A string 55 is attached near the grip 11a of the cylinder body 11 to the end of which a suction cup 54 attached to the vehicle body surface 2 near the fuel filler opening 1 of the vehicle is attached. The suction cup 54 is made of, for example, a material such as plastic or rubber, and has a suction force enough to prevent the oil supply nozzle 10 from dropping when sucked on the vehicle body surface 2.

Next, the automatic valve closing mechanism 3 for the refueling oil nozzle 10
An operation centered on 0 will be described. First, the spring 15
The main valve 16 urged against the valve seat 24 closes the flow path by contacting the valve seat 24, and the pin 40 located in the notch 41 of the valve rod 14 engages with the concave portion 42 of the push rod 17 to engage the valve rod 14. Lever 1 with the push rod 17 and the
When the user pulls 9, the valve rod 14 moves together with the push rod 17 in the direction shown in the drawing to open the flow path.

When the liquid supply is started in this manner, a negative pressure is generated in the air flow pipe 21 due to the Venturi effect generated in the negative pressure generating section 23 of the check valve 22. The opening 12a of the tube tip 12 of the pipe 21 is in the atmosphere, and the air sucked from the opening 12a
To the negative pressure chamber 31 of the automatic valve closing mechanism 30.
Has no negative pressure.

The liquid level in the tank rises due to the subsequent liquid supply operation, and the opening 12a at the tip end of the cylinder tip 12 is soon formed.
Is closed by the liquid surface or a bubble on the liquid surface, the inside of the negative pressure chamber 31 communicating with the air passage pipe 21 receives the negative pressure generated by the negative pressure generating part 23 and becomes negative pressure. . As a result, the main diaphragm 33 bends upward against the spring 32, and pulls up the piece 39 integrated therewith to move the pin 4
0 from the concave portion 42 of the push rod 17 and the valve rod 14
Is released by the urging force of the spring 15, and the main valve 16 is brought into contact with the valve seat 24 to close the flow path.

When the negative pressure increases due to the pin 40 biting the notch 41 or the concave portion 42, the automatic valve closing mechanism 30 cannot be operated only by the force of the main diaphragm 33. In such a case, the sub-diaphragm 38, which has received a larger negative pressure generated by the negative pressure generating section 23, bends downward against the spring 37, and the lower members 46 fixed to the lower surface of the levers 43, 43 Each outer end is pressed down. For this reason, the left and right levers 4
3, 43 rotate counterclockwise and clockwise, respectively.
The center pin 45 is pushed up from below by its inner end, and the upward deflection of the main diaphragm 33 which is integral with the center pin 45 is promoted.

In this manner, the pin 40 is tightly clamped between the notch 41 of the valve rod 14 and the recess 42 of the push rod 17 so that the main diaphragm 33 does not have a sufficient upward bending for detachment. Even if a case occurs, the bending force of the sub-diaphragm 38 acting on the center pin 45 via the levers 43, 43 causes the main diaphragm 33 to be sufficiently bent, whereby the pin 40 is disengaged from the recess 42 of the push rod 17. Then, the valve rod 14 is released and the normal valve closing operation is performed.

Next, as shown in FIG. 1, when the fuel supply nozzle 10 having the automatic valve closing mechanism 30 having the above-described structure performs a refueling operation, the cylinder tip 12 is inserted into the fuel filler port 1 of the automobile, and the magnet 50 is refueled. The suction port 54 is adsorbed around the mouth 1 and the suction cup 54 is adsorbed to the vehicle body surface 2 around the fuel supply port 1. Thereby, the state in which the cylinder tip 12 is inserted into the oil supply port 1 by the attraction force of the magnet 50 is firmly held in the oil supply nozzle 10. Further, since the magnet 50 is mounted via the holding portion 51 and the ventilation hole 53 is formed between the magnet 50 and the holding portion 51, the fuel filler port 1 is not sealed. Further, the fueling nozzle 10 is attached to the suction cup 54 adsorbed on the vehicle body surface 2 by a string 5.
By being connected to the vicinity of the grip 11 a of the cylinder body 11 through the cylinder 5, the cylinder tip 12 is prevented from dropping out of the fuel filler port 1. Therefore, the refueling nozzle 10 provided with the automatic valve closing mechanism 30 can reliably perform refueling stoppage due to refueling.

In the above embodiment, the refueling nozzle 10 provided with the automatic valve closing mechanism 30 having the main diaphragm 33 and the sub-diaphragm 38 has been described as an example.
Any structure may be used as long as the automatic valve closing mechanism operates at least by receiving a negative pressure from the opening for detecting the liquid level formed on the tip end side of the cylinder tip portion 12. Also, an example in which both the magnet 50 and the suction cup 54 are provided has been described, but only one of the locking means may be provided as a locking means capable of maintaining a state in which the refueling nozzle 10 is held during refueling. Further, although the magnet 50 is attached via the holding portion 51, a magnet having a ventilation hole may be attached directly.

[0021]

As described above, in the refueling nozzle of the present invention, an opening for detecting the liquid level is formed at the tip end of the cylinder tip provided in the cylinder body, and the opening is formed by detecting the liquid level at this opening. Equipped with an automatic valve closing mechanism that operates by receiving a negative pressure, and by providing locking means for holding a state in which the cylinder tip is inserted into the fuel filler port, the locking means can prevent falling from the fuel filler port, Refueling can be stopped reliably.

[Brief description of the drawings]

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

FIG. 2 is a plan view showing a cross section of a fueling nozzle according to the embodiment of the present invention.

FIG. 3 is an enlarged plan view showing a cross section of a valve closing mechanism portion of the fueling nozzle according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of the fueling nozzle of FIG. 1;

[Explanation of symbols]

 Reference Signs List 10 refueling nozzle 11 cylinder body 11a grip part 12 cylinder tip 12a opening 13 refueling hose 14 valve rod 15 spring 16 main valve 17 push rod 18 spring 19 lever 20 pin 21 air flow pipe 22 check valve 23 negative pressure generating part 24 Valve seat 30 Automatic valve closing mechanism 31 Negative pressure chamber 32 Spring 33 Main diaphragm 34 Holding member 35 Prop 36 Spring seat 37 Spring 38 Sub-diaphragm 39 Piece 40 Pin 41 Notch 42 Recess 43 Lever 44 Pin 45 Center pin 46 Pushing member 47 Cover 48 air hole 50 magnet 51 holding part 52 air hole 54 sucker 55 string

Claims (4)

[Claims] 1. An automatic valve closing mechanism which has an opening for detecting a liquid level at a tip end side of a cylinder tip provided in a cylinder body, and operates by receiving a negative pressure effect generated by the liquid level detection at the opening. And a locking means for holding a state where the cylinder tip is inserted into a fuel filler port is provided. 2. The refueling nozzle according to claim 1, wherein the locking means is a magnet that is attracted to a refueling port attached to a cylinder body of the cylinder tip. 3. The refueling nozzle according to claim 2, wherein a vent hole is formed in said locking means. 4. The refueling nozzle according to claim 1, wherein said locking means is provided with a suction cup attached to a surface of a vehicle body around a refueling port on a cylinder body via a cord.