JPH0536320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refueling nozzle, and more particularly to a refueling nozzle formed into a rod-like shape as a whole by making the nozzle body and discharge pipe as straight as possible.

[Prior Art] Conventionally, a so-called "pistol-shaped" refueling nozzle, which is disclosed in Japanese Patent Laid-Open No. 151919/1983, is known as a refueling nozzle used in gas stations and the like. This type of refueling nozzle is shown in FIG.

In the figure, 1 is a nozzle body which is provided with an oil passage and a valve mechanism (both not shown) located inside the oil passage, and the tip of the nozzle body 1 is connected to the oil passage. A discharge pipe is provided to protrude from the nozzle body 1, and a grip portion 3 is provided from the rear end of the nozzle body 1 to project obliquely downward. An operating lever 4 for operating the valve mechanism is protruded from a corner formed by the gripping part 3 and the nozzle body 1 so as to be rotatable in the direction of arrow A. The tip of the lever 4 is protected by a substantially arc-shaped lever guard 5, which has one end attached to the nozzle body 1 and the other end attached to the grip part 3. Thus,
The refueling nozzle according to the prior art has a pistol-shaped overall configuration including a nozzle body 1, a discharge pipe 2, a grip portion 3, an operating lever 4, and a lever guard 5.

In addition, 6 in the figure is a lock member for locking the operation lever 4 in the operating state where the valve mechanism is opened, and 7
is a rotation joint provided on the side surface of the nozzle body 1 for rotatably connecting the hose 8 to the nozzle body 1.

[Problems to be Solved by the Invention] By the way, the pistol-type refueling nozzle described above has the following drawbacks.

For example, in the case of a fuel tank such as a truck fuel tank where the tank body is provided below the loading platform and the cylindrical fuel filler port is provided protruding from the top surface of the tank body toward the loading platform, the fuel filler port and There is not enough space between it and the loading platform. For this reason, when inserting the discharge pipe of the refueling nozzle into the refueling port, the grip protruding from the nozzle body or even the nozzle itself may hit the tank body or loading platform, causing damage to the refueling nozzle or during refueling work. Sexuality is inhibited.

In order to deal with the above-mentioned drawbacks, refueling is carried out by placing the refueling nozzle horizontally in the gap between the refueling port and the loading platform and inserting the discharge pipe into the refueling port. Because the position is unstable, there is a problem that during automatic refueling, the discharge pipe comes off from the refueling port due to vibrations as the oil flows, causing the refueling nozzle to fall and the oil to be scattered around.

Furthermore, when refueling a vehicle such as a small vehicle whose refueling port is located low from the ground, the grip part 3 and operating lever 4 of the refueling nozzle are provided below the nozzle body 1, so the operator must There is also the disadvantage that it is difficult to operate the refueling nozzle as well as refueling work, as it requires bending down or bending the wrist or elbow unnaturally.

The present invention was made in view of the above-mentioned drawbacks of the prior art, and the problems to be solved by the present invention are as follows:
To easily perform refueling work even when the refueling port of a fuel tank is located in a narrow area or at a low position from the ground, and to securely and easily lock and hold an operating lever.

[Means for solving problems]

The means of the present invention configured to solve the above-mentioned problems includes a nozzle body that is formed into a substantially straight rod shape and has an oil passage provided therein, and a nozzle body that communicates with the oil passage. a discharge pipe protruding from the tip in a direction coaxial with the nozzle body; a valve body that seats on and off from a valve seat formed in the nozzle body for opening and closing the oil passage; and a valve body provided so as to be movable in and out of the nozzle body. a valve shaft having one end connected to the valve body; a valve spring that biases the valve body in the valve closing direction via the valve shaft; and a valve spring recessed in the rear end side of the nozzle body. a lever chamber whose other end protrudes; an operating lever which is provided so as to be able to go in and out of the lever chamber and to which the other end of the valve shaft is connected; and the operating lever is operated and retracted in order to close the valve body. The nozzle body includes a locking means provided over the nozzle body and the valve shaft to lock the valve shaft.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on FIG. 1 and FIG. 4.

In the figure, reference numeral 11 denotes a nozzle body formed in the shape of a straight rod as a whole. An oil passage 12 is formed in the nozzle body 11, and an inlet 13 of the oil passage 12 is located in the middle of the nozzle body 11. opening in the
The outlet 14 opens at the tip of the nozzle body 11. Reference numeral 15 denotes a discharge pipe which is provided at the tip of the nozzle body 11 and protrudes coaxially with the nozzle body 11 through a connection port member 51 which will be described later.
The base end of 5 communicates with the outlet 14 of the oil passage 12, and the tip thereof becomes the outlet 15A.

16 is the oil passage 1 for opening and closing the oil passage 12;
A valve seat 16 is located within the nozzle body 11 and a valve body 17 is provided on the valve seat 16 so as to be able to be seated on and removed from the valve seat 16. Here, a pin insertion hole 18 is formed in the center of the valve body 17, and a first hole is formed on both sides of the valve body 17 concentrically with the pin insertion hole 18, facing upstream and downstream. Recess 19 and second recess 20
are respectively formed, and the first recess 19
A micro passage 21 is provided that communicates with the downstream side surface of the valve body 17. 22 is a connecting pin slidably inserted into the pin insertion hole 18;
One end side has a male thread 2 that screws into a valve shaft 23 which will be described later.
2A is carved, and the other end side head portion 22B can be loosely fitted into the second recess 20.

23 is a valve shaft provided in the nozzle body 11 through a sleeve 24 so as to be movable in the directions of arrows B and B';
Reference numeral 25 denotes a front shaft that constitutes the valve shaft 23. The tip of the front shaft 25 can come into contact with the first recess 19 of the valve body 17, and has a female thread 25A into which the male thread 22A of the connecting pin 22 is screwed. It is recessed. Further, the rear end portion of the front shaft 25 is formed to have a small diameter, and serves as an insertion portion 25B that is slidably inserted into the rear shaft, which will be described later. A matching groove 26 is recessed.

On the other hand, 27 is a rear shaft that constitutes the valve shaft 23 together with the front shaft 25, and the insertion portion 25 of the front shaft 25 is located at the tip of the rear shaft 27.
An insertion hole 28 into which B is slidably inserted is formed, and a notch 29 corresponding to the engagement groove 26 is formed at the tip facing the insertion hole 28. Further, the rear end of the rear shaft 27 projects into a lever chamber 33, which will be described later, and a locking pin 30 is provided at the rearmost end to project in the radial direction. Reference numeral 31 denotes a collar member 32 protruding from the front shaft 25 and the nozzle body 11.
The compression spring 31 normally biases the valve body 17 in the valve-closing direction via the valve shaft 23.

Next, 33 is a lever chamber located on the rear end side of the nozzle body 11 and having a recessed downward opening;
A rear end portion of the rear shaft 27 of the valve shaft 23 projects into the lever chamber 33 . 34 is an operating lever for retracting the valve shaft 23 against the compression spring 31 in order to open the valve body 17;
Reference numeral 4 denotes a grip portion 34A that is made of a plate material having a substantially U-shaped cross section and that moves in and out of the lever chamber 33, and a connecting portion 34 in the form of a protrusion that projects upward from one end of the grip portion 34A.
The connecting portion 34B has an elongated hole 35 into which a locking pin 30 protruding from the rear end of the valve shaft 23 is slidably engaged. The operating lever 34 formed as described above is rotatably supported in the lever chamber 33 via a support shaft 36 in the directions of arrows C and C', and is connected to the operating lever 34 via the support shaft 36. A return spring 37 stretched between the nozzle bodies 11 normally biases the nozzle in the counterclockwise direction in FIG.

Reference numeral 38 denotes an opening located between the oil passage 12 and the lever chamber 33 and formed in the lateral direction of the nozzle body 11. Inside and above the opening 38 is an operating lever 34 for opening the valve body 17. A locking means 39 is provided for locking the valve shaft 23 which is operated and retreated in the direction of arrow C'. That is, the locking means 39
is located in the middle of the rear shaft 27 of the valve stem 23 and protrudes upward, and the tip 40A is connected to the nozzle body 11.
A locking claw 40 bent in a substantially dogleg shape toward the tip
, a push locking member 42 located above the inside of the opening 38 and rotatably provided on the nozzle body 11 via a support shaft 41 in the directions of arrows D and D';
1, a return spring 43 is stretched between the nozzle body 11 and the push locking member 42, and normally biases the push lock member 42 in a counterclockwise direction, that is, in the direction of arrow D'. It is composed of. The push locking member 42 has a flat base 42A whose front end is pivotally supported by the support shaft 41, and a substantially flat disc-shaped pressing portion 42B extending laterally from the upper end of the base 42A. The base portion 42A is formed into a substantially T-shape.
By forming a pair of notches 44 and 45 inclined in the same direction as the tip end 40A of the locking pawl 40 on the lower edge of the locking pawl 40, a pair of locking locks with which the tip end 40A of the locking pawl 40 engages are formed. There are provided projections 46 and 47 (see FIGS. 3 and 4).

Next, reference numeral 48 in FIG. 1 indicates an automatic valve closing mechanism that automatically closes the valve body 17 when the liquid level in the tank reaches a predetermined liquid level. 49 is the automatic valve closing mechanism 4
8, the diaphragm 4
9 is located below the valve stem 23 and provided within the opening 38 . A cap 50 closes the lower end of the opening 38, and a negative pressure chamber 51 is formed between the cap 50 and the diaphragm 49. 52 is a U-shaped receiving plate located on the other side of the spring receiver 53 and fixed to the diaphragm 49;
The bookmarks 2A and 52A face each other via the valve shaft 23, and elongated holes 54 and 54 are formed along the axis of the valve shaft 23. Reference numerals 55 and 55 denote a pair of rod-shaped rollers whose axial ends are slidably fitted into the respective elongated holes 54, and the rollers 55 are inserted into the notch 2 of the rear shaft 27.
9, it can be engaged with and detached from the engagement groove 26 of the front shaft 25. A spring 56 is provided in the negative pressure chamber 51 and urges the rod-shaped roller 55 to fit into the engagement groove 26 of the front shaft 25 via the diaphragm 49 and the receiving plate 52. Thus, the automatic valve closing mechanism 48 of this embodiment includes the diaphragm 49, the cap 50, the negative pressure chamber 51, the receiving plate 52,
It is generally composed of a rod-shaped roller 55 and a spring 56.

Next, reference numeral 57 denotes a connection port member located in front of the valve seat 16, fitted into the outflow port 14, and fixed to the nozzle body 11 with a fastening fitting 58. A discharge pipe 15 is screwed on. Further, the valve support portion 57 of the connection port member 57
An auxiliary valve 59 is slidably inserted into A,
The auxiliary valve 59 is normally held against the valve seat 16 by a spring 60 stretched between the connection port member 57 and the auxiliary valve 59.
is biased to be seated.

Further, 61 is a liquid level detection tube disposed inside the discharge pipe 15, and one end of the liquid level detection tube 61 is connected to the intake port 6.
1A and opens near the discharge port 15A of the discharge pipe 15, and the other end is fitted into the connection port member 57. 62 is a ventilation path provided in the connection port member 51;
63 is an annular air passage formed between the nozzle body 11 and the connection port member 57. The annular air passage 63 communicates with the negative pressure chamber 51 via another air passage 64 formed in the nozzle body 11, and as a result, the negative pressure chamber 51 is connected to the air passages 64, 63, 62, the liquid It communicates with the outside air through surface detection tubes 61 in sequence.
On the other hand, 65 is an intake passage provided in the valve seat 16,
One end of the intake passage 65 communicates with an annular air passage 63, and the other end communicates with an annular passage 66 between the valve seat 16 and the auxiliary valve 59. Thus, according to this embodiment, when the valve body 17 is opened and the auxiliary valve 59 is opened, the annular passage 66 becomes a throttle passage, and negative pressure is generated in the intake passage 65 by the vent lily action. to try to suck the air inside the negative pressure chamber 51. However, at the stage where the inside of the tank does not reach a predetermined liquid level, the liquid level detection tube 61, the ventilation path 62,
As a result of sucking the atmosphere through 63, the inside of negative pressure chamber 51 does not become negative pressure. When a predetermined amount of liquid is supplied into the tank, the inlet port 61A of the liquid level detection tube 61 is closed, and the air in the negative pressure chamber 51 is sucked in because the air cannot be sucked in. As a result, the inside of the negative pressure chamber 51 becomes negative pressure, and the spring 56
1, the diaphragm 49 is displaced downward in FIG. Thus, the receiving plate 52 is also displaced downward together with the diaphragm 49, and the front shaft 2 of the valve stem 23 is
As a result, the rod-shaped roller 55 that integrally connected the rear shaft 27 with the front shaft 25 moves forward by the spring force of the compression spring 31 to move the valve body 17 to the valve seat 16. make them sit down.

Next, reference numeral 67 denotes a tubular connection portion that protrudes laterally from an intermediate position of the nozzle body 11 to form the inflow port 13 of the oil passage 12, and the tubular connection portion 67 has a plurality of inflow holes on its peripheral wall on the distal end side. 68, 68 are bored. 69 is a hose, 70 is a joint member for connecting the nozzle body 11 to the hose 69, and the joint member 70 is rotatably fitted into the tubular connecting portion 67,
The inner peripheral surface is integrally formed with a horizontal tube section 71 having a recessed flow path 71A surrounding the inlet, and a vertical tube section 72 arranged in a T-shape with respect to the horizontal tube section 71. is formed. And the tubular connection part 67
The horizontal tube portion 71 fitted into the tube is rotatably locked by a cap 73 screwed onto the tip of the tubular connection portion 67, and a hose joint 74 is connected to the open end of the vertical tube portion 72. A hose 69 is rotatably connected thereto.

In the figure, reference numerals 75 and 76 indicate magnetic plates that are screwed onto the side surfaces of the nozzle body 11 and the outer peripheral surface of the vertical tube portion 72 of the joint member 70, and when the respective magnetic plates 75 and 76 are attracted, the nozzle The main body 11 is held along the axial direction of the vertical tube portion 72. Further, 77 is a cover attached to the nozzle body 11.

The refueling nozzle of this embodiment is constructed as described above.Next, the operation of the refueling nozzle will be explained using an example in which the refueling nozzle is used as a suspended type refueling nozzle.

The refueling nozzle is suspended from a high place at the refueling station via a hose 69, and when waiting for refueling, the discharge pipe 1
In order to prevent oil from dripping from the discharge port 15A of the discharge pipe 15, the magnetic plates 75 and 76 are attracted to each other so that the tip of the discharge pipe 15 faces upward.
The operating lever 34 is in a state of protruding downward from the lower end of the hose 69.

During refueling work, the refueling nozzle descends in the above-described state, so the operator grasps the rear end side of the nozzle body 11 together with the operating lever 34, and presses the magnetic plate 7.
The refueling nozzle is rotated with respect to the hose 69 against the suction force of the hoses 5 and 76, and the discharge pipe 15 is inserted into the refueling port of the vehicle. At this time, if the gap between the fuel filler port and the loading platform is narrow, such as in the case of a truck fuel tank, the hose can be adjusted by making the vertical pipe part 72 of the joint member 70 and the rear end side of the nozzle body 11 parallel. 6
9. Since the nozzle body 11 and the discharge pipe 5 can be formed into a substantially straight line, the discharge pipe 15 can be inserted into the fuel filler port as long as there is a space in the height direction corresponding to the height of the nozzle body 11.

The refueling nozzle with the discharge pipe 15 inserted into the refueling port as described above is in the state shown in FIG. 1 as a whole before the operating lever 34 is operated.

Therefore, in order to refuel the tank, the operating lever 34 is returned and pulled in the direction of arrow C against the spring force of the spring 37.
When the valve shaft 23 is rotated in the direction indicated by the arrow B', the valve shaft 23 moves back in the direction indicated by the arrow B' against the spring force of the valve spring 31. At this time, the valve body 17, which is seated on the valve seat 16 and blocking the oil passage 12, retreats integrally with the valve shaft 23 via the connecting pin 22 and leaves the valve seat 16. As a result, the oil passage 12
is opened and the oil from the metering machine is supplied into the fuel tank from the discharge pipe 15 via the oil passage 12.

Note that the refueling nozzle of this embodiment is configured to perform automatic valve-closing refueling by the automatic valve-closing mechanism 48 during the refueling operation described above, but the mechanism 48 and its operation are substantially different from known ones. There is no difference, so I will omit the explanation.

Therefore, in this embodiment, the operating lever 34
Since a locking means 39 is provided for locking the valve shaft 23 in a predetermined valve opening state to open the valve body 17 in accordance with the operation of the locking means 39, its operation will be explained with reference to FIGS. 3 and 4.

FIG. 3 shows the state of the locking means 39 when the valve body 17 is in the closed state, and the locking pawl 40 is at the most advanced position along with the valve shaft 23. On the other hand, the push locking member 42 is in a free state with respect to the locking pawl 40, and is urged in the direction of arrow D by the spring force of the return spring 43, and reaches the state where it protrudes most from the nozzle body 11. ing. Next, when refueling while holding the valve body 17 in a predetermined open state, grasp the nozzle body 11 with your hand and move the push locking member 42 with your thumb in the direction of the arrow.
While pushing down in the D' direction, squeeze the operating lever 34 with your index finger and middle finger. Then, the locking pawl 40 slides into contact with the lower edge of the push locking member 42 and slides onto the valve shaft 23.
, it moves in the direction of arrow B' and fits into the first notch 44 as shown by the dashed line. When the operating lever 34 is further pulled, the locking pawl 40 moves further in the direction of arrow B' and fits into the second notch 45. Therefore, the pull on the operating lever 34 is loosened. Then, the valve shaft 23 returns in the direction of arrow B by the spring force of the compression spring 31 and the return spring 37, and the tip 40A of the locking pawl 40 enters into the notch 45. Therefore, when the pressing force on the push locking member 42 that had been pressed down with the thumb is released, the push lock member 42 rotates in the direction of arrow D due to the spring force of the return spring 43, and the locking claw 40 The distal end portion 40A and the locking protrusion 47 engage with each other. As a result, the valve shaft 23 is moved to the push locking member 42.
The valve body 17 is held in a predetermined open state.

Furthermore, when filling the tank with a predetermined amount of oil and completing the refueling operation, the operating lever 34 is slightly pulled to move the valve shaft 23 backward in the direction of arrow B'. Then, the tip end 40A of the locking pawl 40 retreats from the notch 45 and disengages from the locking protrusion 47, and the push locking member 42 is automatically released by the spring force of the return spring 43. At the same time as the valve returns to the closed state shown in FIG.
6, the oil passage 12 is closed.

In addition, in the above-described operation, the locking pawl 40 locks the second locking protrusion 47 on the rear end side of the nozzle body 11 to bring the valve body 17 into the fully open state, which is the farthest distance from the valve seat 16. By locking the locking pawl 40 with the first locking protrusion 46 in the same manner, the discharge amount of oil can be controlled, and by increasing the number of locking protrusions, the discharge amount can be controlled in multiple stages. can be controlled. Further, the locking means 39 of this embodiment has a locking pawl 40 protruding from the valve shaft 23, and a push locking member 4
2 includes a locking protrusion 46 that engages with the locking claw 40;
47, however, the valve stem may be provided with a locking groove, and the push locking member may be provided with a locking pawl that engages with the locking groove.

In this embodiment described above, the locking pawl 40 is provided protrudingly on the valve shaft 23, and the valve shaft 23 is inserted through the locking pawl 40 by the pushing locking member 42 provided on the nozzle body 11. The structure is such that the valve is locked in the open position, and the link mechanism that locks the operating lever 4 with the locking member 6 provided on the lever guard 5 as in the prior art is not adopted, so each link may become damaged after long-term use. is worn out,
There is no problem that the opening amount of the valve body 17 changes, and the discharge amount can be maintained accurately.

Furthermore, in the embodiment, the pushing locking member 42 can be pushed with only the thumb, and the operating lever 34 can be operated with all other fingers, so the force applied to each finger is reduced, and the operating lever 34 becomes easier to operate, improving work efficiency.

〔Effect of the invention〕

According to the present invention configured as detailed above,
The following effects are achieved.

The refueling nozzle has a substantially straight nozzle body, a discharge pipe that runs along the axial direction of the nozzle body, and an operating lever that can be moved in and out of the nozzle body, making it ideal for vehicles with narrow space above the refueling port or for refueling. It is possible to easily refuel vehicles with a low opening position, and since the discharge pipe can be fully inserted into the refueling port, an accident in which the refueling nozzle falls from the tank or the like during refueling can be reliably prevented.

Since the locking means for locking the valve stem is provided near the operating lever, the locking means and the operating lever can be easily and reliably operated with fingers.

Since the valve stem is configured to be directly locked by the locking means, the mechanism is simple and uniform parts can be manufactured during manufacturing, ensuring an accurate valve opening state over a long period of time. can,
The reliability of the refueling nozzle can be improved.

[Brief explanation of the drawing]

Figures 1 to 4 show one embodiment of the present invention, in which Figure 1 is a longitudinal sectional view of the refueling nozzle in the closed state, and Figure 2 is a longitudinal sectional view of the refueling nozzle in the open state. 3 is an enlarged view of the main part showing the state before the locking means is operated, FIG. 4 is an enlarged view of the main part showing the state when the locking means is operated, and FIG. 5 is the prior art. FIG. 11... Nozzle body, 12... Oil passage, 15...
...Discharge pipe, 16... Valve seat, 17... Valve body, 2
3... Valve stem, 31... Valve spring, 33... Lever chamber, 34... Operating lever, 39... Locking means.

Claims (1)

[Scope of Claims] 1. A nozzle body formed into a substantially straight rod shape and having an oil passage provided therein, and a nozzle body that communicates with the oil passage and protrudes from the tip of the nozzle body coaxially with the nozzle body. a discharge pipe, a valve body that is seated on and off a valve seat formed in the nozzle body for opening and closing the oil passage, and a valve body that is provided so as to be movable in and out of the nozzle body, and one end of which is connected to the valve body. a valve stem, a valve spring that urges the valve body in a valve closing direction via the valve stem, a lever chamber that is recessed in the rear end side of the nozzle body and from which the other end of the valve stem projects; an operating lever provided so as to be movable into and out of the lever chamber and to which the other end of the valve shaft is connected; and an operating lever for locking the valve shaft that has been retreated by operating the operating lever to open the valve body. A refueling nozzle consisting of a nozzle body and a locking means provided around the valve stem. 2. The locking means comprises a locking claw protruding from the valve stem and a push locking member located near the operating lever and provided on the upper side of the nozzle body. refueling nozzle.