JPS5910077Y2 - Liquid supply nozzle - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a nozzle for a liquid supply device such as a fuel supply device used at a gas station or the like.

Conventionally, one problem with this type of refueling system is that the vehicle being refueled suddenly moves during refueling and the nozzle is pulled and the refueling hose is torn off, or the connection between the nozzle and the refueling hose or between the refueling hose and the refueling device is damaged. Occasionally, accidents occur where a large amount of oil comes off and is sprayed all over the place.

This is especially dangerous if the sprayed oil is highly flammable and explosive, such as gasoline.

In order to prevent such a danger, a safety valve has been proposed in which when a tensile force above a certain level is applied to the connection between the nozzle and the refueling hose, the nozzle and the refueling hose separate from each other and the built-in valve closes.

However, when such a safety valve is provided internally, the entire nozzle becomes heavy and large, making refueling operations difficult.

This alone has drawbacks such as the flow path inside the safety valve being complicated, resulting in large pressure loss and reduced discharge flow rate from the nozzle, and is also expensive.

This invention prevents danger by automatically closing the nozzle valve in the event of an accident as described above, and also provides a liquid supply nozzle that is inexpensive and easy to operate without reducing the discharge flow rate.

The illustrated embodiment will be described below.

In the figure, 1 is a nozzle main body, 2 is a flow path passing through this main body, 3 is a refueling hose, and 4 is a main valve for opening and closing the flow path 2, which is held on a valve shaft 7.

Reference numeral 8 denotes an operating rod that operates the main valve 4 via the valve shaft 7. When the trigger lever 9 is pulled with a fingertip and rotates around the support shaft 10, the operating rod 8 moves forward and opens the main valve body 4. .

At this time, as is well known, the sub valve 5 opens first and the main valve 4 opens.
The main valve 5 is made easier to open by reducing the pressure on the inlet side of the main valve 5.

9a is a hole into which a fingertip is inserted. Reference numeral 11 is a claw rod connected to the lower part of the nozzle body 1, and the lever 9 is hooked with a claw K to maintain the lever 9 in the pulled rotational position.

Reference numeral 14 denotes a tip pipe attached to the tip of the nozzle body 1 for supplying oil from the flow path 2 to, for example, a vehicle to be oiled.

The features of this device are that the lever 9 is displaceably attached to the support shaft 10 (that is, the fulcrum position of the lever 9 is movable on this lever), and that this displacement is always regulated; The pipe 14 is installed so as to be displaceable in the longitudinal direction with respect to the nozzle body 1, and the restriction on the fulcrum position of the lever is released by displacing the tip pipe.

That is, the support shaft 10 is fixed to the nozzle body 1, and an elongated hole 9b is bored at the upper end of the lever 9, and the support shaft 10 is inserted into this elongated hole.
is engaged.

A roller shaft 9C is attached to the upper end of the lever 9, and the pawl 12a of the L-shaped regulating piece 12 engages with the roller shaft 9C, causing the lever 9 to
is held so that the support shaft 10 contacts the left end of the elongated hole 9b.

In this position, the lever 9 can rotate around the support shaft 10 to open and close the valve 5.

The side surfaces 12b of the claws 12a of the regulating piece 12 are slightly curved to allow the roller shaft 9C to roll when the lever 9 is rotated.

The tip of the regulating piece 12 (the left end in FIG. 1) is brought into contact with the rear end (right end) of the follower rod 13, and the follower rod is slidably inserted into the guide hole 1a provided in the nozzle body 1. There is.

12C is a guide pin implanted in the regulating piece 12, and 1b is a guide slot provided above the guide hole 1a of the nozzle body 1, with which the pin 12C engages to guide and regulate the displacement of the regulating piece 12, which will be described later.

As will be described later, when the tip pipe 14 is displaced to the left in the figure and following this displacement, the tracking rod 13 is displaced to the left as shown in FIGS. 2 and 4, the lever 9 is moved by the pivot piece 12. The restriction is released, and the lever 9 is displaced to the left by the repulsive force of the spring 6 acting on the operating rod 8 and the hydraulic pressure acting on the valve 4 until the support shaft 10 abuts the right end of the elongated hole 9b, as shown in FIG. state.

In this state, the main valve 4 returns to its position and closes the flow path 2 as shown.

That is, when the tip pipe 14 is displaced with respect to the nozzle body 1 during refueling, the main valve 4 automatically closes the flow path 2.

The tip pipe 14 is attached to the nozzle body 1 so as to be freely displaceable in the axial direction.

That is, 15 is a connector attached to the tip (left end) of the nozzle body 1, which includes a packing 16 that seals against the tip pipe 14, a packing 18 that seals against the nut 17, and a connector that is inserted with a constant force. It has a sphere 19 for holding.

Therefore, when the tip pipe 14 is inserted, the packing 1
After sealing is performed in step 6.18, the sphere 19 fits into the holding hole 14H formed in the tip pipe 14 to maintain the connection between the tip pipe 14 and the nozzle body 1.

A ring body 20 is fixed to the base end (right side part) of the tip pipe 14 by a set screw 21, and the driving rod 13 is connected above the ring body 20 via a connecting pin 22. .

In the above structure, when the refueled vehicle starts to move during refueling and the tip pipe 14 is pulled against the nozzle body with a force exceeding a set value, the spherical body 19 as shown in FIG.
As a result, the peripheral edge of the tip pipe near the hole 14H is deformed or destroyed, the tip pipe 14 is displaced or separated from the nozzle body 1, and the follower rod 13 is pulled to the left.

As shown in FIG. 2, this displacement of the driving rod 13 causes the repulsive force of the spring 6 and the pressure of the oil to push the lever 9 to the left via the valve shaft 7 and the operating rod 8, and the roller shaft 9C pushes the regulating piece 12. Displace to the left.

That is, the rotation of the roller shaft 9C by the regulating piece 12 is released, and as a result, the main valve 4 closes the flow path 2 as described above, and the oil supply is automatically stopped.

The features of this invention are as described above, but are not limited to the illustrated example.

For example, the structure and shape of the restricting means for the operating lever are not limited to the illustrated example.

The control mechanism for releasing the restricting means is not limited to the following rod as shown in the illustrated example, but a mechanism suitable for the structure of the restricting means may be adopted.

It is also possible to apply this method to applications other than refueling nozzles.

This idea has been described in detail above, so if the tip pipe is inserted into a nozzle that opens and closes the liquid supply path using a manual operation lever, an abnormality may occur on the supplied liquid side during liquid supply and the tip pipe may be pulled. Even if an accident occurs, liquid supply can be automatically and quickly stopped, and this can be done with an extremely simple structure.

The nozzle itself can also be provided at low cost without increasing its size and complexity.

[Brief explanation of drawings]

Figure 1 is a front view showing a part of an embodiment of this invention in longitudinal section, Figure 2 is a sectional view of the main part, Figure 3 is a diagram showing the connection between the tip pipe and the nozzle body, and Figure 4. 3 is a diagram showing a state in which the tip pipe is displaced and detached from FIG. 3; FIG. 1... Nozzle body, 2... Channel, 4...
...Main valve, 7...Valve stem, 8...
Operating rod, 9...Trigger lever, 9C...
... Roller axis, 10... Support shaft, 12...
Regulating piece, 13...Following rod, 14...Tip pipe, 19...Sphere, 20...Ring body, 21... Don't stop.

Claims (1)

[Scope of utility model registration request] In a liquid supply nozzle in which a built-in valve that opens and closes a through-flow passage is opened and closed by lever operation, the nozzle tip pipe is attached to the nozzle body so that it can be displaced relative to the nozzle body by a tensile force that is greater than a set value applied between the two, and the above-mentioned method is used. A lever is mounted so as to be displaceable relative to a support shaft fixed to the nozzle body, so that displacement of the lever relative to the support shaft causes the valve to close, and the displacement of the lever relative to the support shaft is normally restricted. A liquid supply nozzle characterized in that the liquid supply nozzle is characterized in that the liquid supply nozzle is further equipped with means for releasing the restriction on displacement of the lever relative to the support shaft by the restriction means in response to relative displacement between the nozzle tip pipe and the nozzle body.