JP4892398B2 - Filler pipe filler port structure - Google Patents

Description

  The present invention relates to an oil filler inlet structure of a filler pipe in which an inlet for supplying light oil is formed.

In general, gasoline and light oil are used as fuel for vehicles in the country. When refueling at a gas station, the type of fuel is displayed near the inlet so that gasoline and light oil are not mistakenly charged. Calls attention.
In addition, there is a type in which gasoline and light oil are distinguished from each other by a cap of the inlet.
On the other hand, the inlet is provided with a guide into which the nozzle of the fueling gun of the gas station is fitted (see, for example, Patent Document 1).
JP 2002-166732 A (6th page, FIG. 3)

Patent document 1 is demonstrated based on the following figure.
FIG. 11 is an explanatory view of a conventional technique. An upper portion of a filler tube 201 of a conventional fuel tank is obtained by connecting a second tube member 203 to a first tube member 202. The first tube member 202 is a note. The inlet 204 and the first swing member 205 are provided, and the nozzle 207 of the fuel gun 206 is inserted into the first swing member 205. Therefore, if the nozzle diameter of the fuel gun is large, the fuel gun cannot be inserted and the diameter It is possible to prevent fuel supply using a large nozzle.

However, in the filler tube 201 of the fuel tank of Patent Document 1, it is possible to insert a nozzle having a diameter smaller than the diameter of the first swinging member 205. May be supplied and may contain different fuels.
Although the nozzle diameter of the fuel gun is different for gasoline and light oil, the diameter of the nozzle for gasoline is smaller than the diameter of the nozzle for light oil, so there is a possibility that gasoline may be put into a light oil vehicle There is.
If the fuel is wrongly supplied, engine start failure may occur and the engine may break down, increasing the burden on the user such as parts replacement.

  The present invention prevents filler oil supply to light oil vehicles, prevents engine start failure due to gasoline supply, prevents engine failure, and eliminates user burden such as parts replacement. It is an object to provide a mouth structure.

According to the first aspect of the present invention, a shutter is installed in the filler pipe inlet that communicates with the fuel tank. When the nozzle of the fuel gun is pushed into the inlet, the shutter opens to allow the filler pipe to be refueled. When the nozzle diameter is smaller than a predetermined diameter, the oil supply nozzle structure includes an oil supply nozzle determination device that does not open the shutter. The oil supply nozzle determination device includes a lock mechanism that locks the shutter in a closed state, and a predetermined diameter. It consists of a nozzle diameter confirmation mechanism that allows only a nozzle of a predetermined diameter to pass without passing a smaller nozzle, and an unlock mechanism that unlocks the lock mechanism by the pressing force of the tip of the nozzle that has passed through the nozzle diameter confirmation mechanism. In the filler pipe filler opening structure, the lock mechanism is pivotally attached to a bracket fitted to the pipe body of the filler pipe. , A hook that is engaged with the shutter and locked when the shutter is closed, and a hook that is rotated and switched to a unlocked state that releases the shutter from the shutter, and the hook is held in the locked state. The lock release mechanism includes a release push member to which the tip of the nozzle that has passed through the nozzle diameter confirmation mechanism comes into contact and a pressing force is applied, and a link support member attached to the shutter. A link member that is rotatably supported, and a push rod that is applied with a pressing force via the link member and that switches the hook from the locked state to the unlocked state against the biasing force of the spring. It is characterized by.

  In the invention according to claim 1, when the nozzle of the fuel gun is pushed into the fuel tank inlet, when the nozzle diameter is smaller than a predetermined diameter, there is a fuel nozzle determining device that does not open the shutter in the inlet. When a gasoline refueling gun with a small diameter is inserted into the light oil injection port, the refueling nozzle determination device does not operate and the shutter does not open. Therefore, it is possible to prevent gasoline from being supplied to a light oil vehicle, to prevent engine start failure due to gasoline supply, to prevent engine failure, and to eliminate the burden on the user such as parts replacement. is there.

In addition, the oil supply nozzle determination device includes a lock mechanism that locks the shutter in a closed state, a nozzle diameter confirmation mechanism that allows only nozzles having a predetermined diameter to pass without passing nozzles smaller than the predetermined diameter, and a nozzle diameter confirmation mechanism. The lock release mechanism releases the lock of the lock mechanism by the pressing force of the tip of the nozzle that passes through the lock mechanism . The lock mechanism is pivotally attached to a bracket fitted to the pipe body of the filler pipe and is latched on the shutter. Then, a hook that is rotated and switched between a locked state in which the shutter is closed and the shutter is closed, and an unlocked state in which the shutter is released from the shutter is released, and the hook is biased in a direction in which the hook is held in the locked state. The lock release mechanism has a spring and a release push to which a pressing force is applied by contact of the tip of the nozzle that has passed through the nozzle diameter confirmation mechanism. Material, a link member rotatably supported by a link support member attached to the shutter, a pressing force is applied through the link member, and the hook is released from the locked state against the biasing force of the spring. And a push rod that is rotated to switch the nozzle, and when the nozzle of a fuel gun used for light oil having a predetermined diameter is inserted into the inlet, the lock release mechanism is activated through the nozzle diameter confirmation mechanism, and the shutter open. Therefore, light oil can be supplied.

On the other hand, if a gasoline fuel gun having a diameter smaller than the diameter of the nozzle of the fuel gun used for light oil is inserted into the light oil inlet, it cannot pass through the nozzle diameter confirmation mechanism and the shutter will not open. Therefore, refueling of gasoline can be prevented.
Therefore, there is an advantage that the structure becomes simple and it is possible to prevent gasoline from being supplied to a light oil vehicle.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an external view of a filler pipe oil filler structure according to the present invention.
The filler pipe filler opening structure 11 is employed in the fuel storage device 13 of the vehicle 12 and is a portion that communicates with the fuel tank 14 of the fuel storage device 13 and into which a fuel gun 17 (see FIG. 2) is inserted. .
The vehicle 12 has a diesel engine (not shown) at the front, and the fuel is light oil and is stored in the fuel tank 14.

  The fuel storage device 13 is detachably fitted to a fuel tank 14 disposed at the rear of the vehicle 12, a filler pipe 18 connected to the fuel tank 14 and including the fuel filler structure 11, and an inlet 21 of the filler pipe 18. And a cap 22 that is mated, and the fueling gun 17 is inserted into the inlet 21.

FIG. 2 is an explanatory view of a nozzle of an oil supply gun corresponding to the filler pipe oil supply port structure of the present invention. This will be described with reference to FIG.
The oil supply gun 17 supplies light oil and has a nozzle 24 to be inserted into the injection port 21. The inner diameter of the nozzle 24 is d and the outer diameter is D. The inner diameter d is a predetermined diameter corresponding to the fuel filler structure 11.
Here, the radius of the nozzle 24 at the inner diameter d is rn (see also FIG. 7).

Next, the fuel filler structure 11 will be specifically described.
3 is a cross-sectional view taken along line 3-3 of FIG.
FIG. 4 is a detailed view of part 4 of FIG.
5 is a cross-sectional view taken along line 5-5 of FIG.
6 is a view taken in the direction of arrow 6 in FIG. This will be described with reference to FIG.

The fuel filler structure 11 includes a pipe body 31 having an inlet 21 at an end, a shutter housing recess 32 formed in the pipe body 31, a nozzle bracket 33 fitted to the pipe body 31, and a nozzle bracket 33. It consists of a shutter 34 that is freely rotatable (in the B-axis direction) and an oil supply nozzle determination device 35.
The oil supply nozzle determination device 35 includes a nozzle diameter confirmation mechanism 36, a lock release mechanism 37, and a lock mechanism 38.

The nozzle bracket 33 has a nozzle support hole 41 through which the nozzle 24 of the light oil supply gun 17 passes, and the inner diameter of the nozzle support hole 41 is slightly larger than the outer diameter D of the nozzle 24.
The shutter 34 is a disk-shaped plate that seals the nozzle support hole 41 and is attached to the nozzle bracket 33 via the first hinge mechanism 42, and the first spring 43 presses the shutter 34 against the nozzle support hole 41 in the first hinge mechanism 42. It is what is installed to do. Further, the sealing surface 45 is directed toward the injection port 21, and the back surface 46 facing the sealing surface 45 is disposed toward the fuel tank 14, and the nozzle diameter confirmation mechanism 36 is disposed on the sealing surface 45.

  The nozzle diameter confirmation mechanism 36 is a boss portion 47 formed at the center of the sealing surface 45 of the shutter 34. When the nozzle 24 of the fuel supply gun 17 is fitted into the boss portion 47, the diameter of the nozzle 24 is a predetermined diameter. Judgment. Specifically, it is formed with an outer diameter Ds obtained by adding a predetermined gap to the inner diameter d of the nozzle 24 of the fuel gun 17, and a conical guide portion 48 is formed continuously to a predetermined height. Yes.

  The lock mechanism 38 is formed with a hook 51 that is hooked on the back surface 46 of the shutter 34, the standby stopper 52 is formed on the hook 51 so as to contact the nozzle bracket 33, and the inclined portion 53 is formed on the hook 51. 51 is attached to the nozzle bracket 33 via the second hinge mechanism 54, and a second spring 55 is attached to the second hinge mechanism 54 so that the hook 51 is hooked on the back surface 46 of the shutter 34 to hold the locked state. .

  The lock release mechanism 37 is connected to a release push member 58 that passes through the hole 57 of the shutter 34 and is slidable along the outer peripheral surface of the boss portion 47 (X-axis direction), and the release push member 58. A link member 61, a link support member 62 that is rotatably supported (B-axis direction) and attached to the shutter 34, and a push rod 63 that is pushed by the link member 61 (Z-axis direction). The push rod 63 is slidably held (in the Z-axis direction) and is disposed between the rod holding member 64 attached to the back surface 46 of the shutter 34 and the rod holding member 64 and the latching portion 65 of the push rod 63. And a return spring 66 for returning the push rod 63 to the origin position E (state shown in FIG. 4).

The release pushing member 58 is arranged at a position (distance h) having the same radius as the radius rn of the nozzle 24 of the fuel gun 17, and forms a notch 67 through which the pushing rod 63 passes at the rear portion intersecting the pushing rod 63. ing.
The link member 61 forms an input portion 71 that is swingably connected to a rear portion having a notch portion 67, and an arm that forms the input portion 71 at one end is formed in a dogleg shape. A fulcrum shaft 73 is attached to the center, and both ends of the output contact portion 74 are attached to the other end of the arm.

  The push rod 63 is disposed along the rear surface 46 of the shutter 34, the input end that is one end abuts on the output contact portion 74 of the link member 61, and the output end 76 that is the other end is hooked in the origin position E state. 51 is arranged in the vicinity. The output end 76 may be brought into contact with the hook 51 in the origin position E state.

Next, the operation of the filler pipe fuel filler structure 11 will be described.
FIGS. 7A and 7B are diagrams illustrating a mechanism when the filler pipe filler opening structure is operated by a predetermined fuel gun. (A) has shown the state which started inserting the fuel supply gun 17, (b) has shown the continuation of (a). This will be described with reference to FIG.

  In order to supply light oil to the vehicle 12, when the cap 22 is removed and the nozzle 24 of the light oil supply gun 17 is inserted from the inlet 21 as indicated by the arrow a1, the nozzle 24 is moved as shown in FIG. The boss 47 guides the nozzle bracket 33 to the center. Then, the nozzle 24 is fitted into the boss portion 47.

  As shown in (b), when the refueling gun 17 is further pushed in as indicated by an arrow a2, the release pushing member 58 is pushed inward as indicated by an arrow a3 at the tip of the nozzle 24, so that the link member 61 is moved in the direction indicated by the arrow a4. Thus, the push rod 63 is pushed down against the return spring 66. The pushed push rod 63 rotates the hook 51 against the second spring 55 (in the direction of the arrow a5), so that the hook 51 is separated from the shutter 34 and the shutter 34 is unlocked.

FIGS. 8A and 8B are views showing a state in which fuel is supplied by opening the shutter of the filler pipe filler opening structure. (A) is a detailed view of a part of (b), (b) is a diagram showing a continuation of FIG.
When the refueling gun 17 is further pushed in as shown by the arrow b1, the shutter 34 rotates against the first spring 43 (in the direction of the arrow b2), so that it opens, and the refueling gun 17 is fitted to the nozzle bracket 33 and set. And light oil can be supplied.

  When the shutter 34 is opened, the hook 51 returns by rotating by the second spring 55 (in the direction of the arrow b3), and the standby stopper portion 52 of the hook 51 contacts the nozzle bracket 33 to maintain the standby state.

FIG. 9 is a view for explaining the mechanism when the shutter of the filler pipe filler opening structure is closed and locked.
When the light oil supply is completed and the oil supply gun 17 starts to be pulled out, the shutter 34 starts to return by rotating by the first spring 43 (in the direction of the arrow b4) and pushes the inclined portion 53 of the hook 51. The hook 51 rotates as indicated by an arrow b5, and the shutter 34 is closed by contacting the nozzle bracket 33. When the shutter 34 is closed, the hooks 51 are hooked on the rear surface 46 of the shutter 34 to be locked (the state shown in FIG. 7A).

FIG. 10 is a diagram for explaining a mechanism when the filler pipe oil filler opening structure does not operate with a small nozzle.
When the gasoline refueling gun 81 is inserted into the injection port 21, the inner diameter dg of the gasoline nozzle 82 is smaller than the diameter of the boss portion 47. Therefore, the gasoline nozzle 82 interferes with the boss portion 47 as indicated by a two-dot chain line, and the release pushing member. 58 cannot be pressed, and the shutter 34 does not open. Therefore, it is possible to prevent gasoline from being supplied to a light oil vehicle.
That is, it is possible to prevent gasoline from being supplied to a light oil vehicle, to prevent engine start failure due to gasoline supply, to prevent engine failure, and to eliminate the burden on the user such as replacement of parts.

  The filler pipe fuel filler structure according to the present invention is used in the fuel inlet of the vehicle in the embodiment, but can be used in the case of inserting a nozzle into the pipe.

  The filler pipe filler opening structure of the present invention is suitable for a fuel inlet of a vehicle using light oil as fuel.

It is an external view of the filler opening structure of the filler pipe of this invention. It is explanatory drawing of the nozzle of the fueling gun corresponding to the fueling port structure of the filler pipe of this invention. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a detailed view of part 4 of FIG. 3. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a view taken in the direction of arrow 6 in FIG. 4. It is a figure explaining a mechanism when the filler opening structure of a filler pipe operates with a predetermined fuel gun. It is a figure which shows the state which opens and supplies the shutter of the filler opening structure of a filler pipe. It is a figure explaining a mechanism when the shutter of the filler pipe oil filler opening structure is closed and locked. It is a figure explaining a mechanism when the filler opening structure of a filler pipe does not operate with a small nozzle. It is explanatory drawing of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Filler pipe fuel filler structure, 14 ... Fuel tank, 17 ... Filler gun, 18 ... Filler pipe, 21 ... Filler port, 24 ... Nozzle (nozzle) of predetermined diameter, 31 ... Pipe main body, 34 ... Shutter, 35 DESCRIPTION OF SYMBOLS ... Oil supply nozzle determination apparatus 36 ... Nozzle diameter confirmation mechanism, 37 ... Lock release mechanism, 38 ... Lock mechanism, 51 ... Hook, 55 ... Spring, 58 ... Release pushing member, 61 ... Link member, 62 ... Link support member, 63 ... push rod, 82 ... nozzle smaller than a predetermined diameter (gasoline nozzle).

Claims (1)

When a shutter (34) is mounted in the inlet (21 ) of the filler pipe (18) communicating with the fuel tank (14) , and the nozzle of the fuel gun (17) is pushed into the inlet (21) , An oil filler opening structure of a filler pipe that enables refueling by opening the shutter (34) ,
When the diameter of the nozzle is smaller than a predetermined diameter, the shutter (34) is provided with a refueling nozzle determination device (35) that does not open , and the refueling nozzle determination device (35) closes the shutter (34). Passes through a lock mechanism (38) for locking, a nozzle diameter confirmation mechanism (36) that allows only nozzles of the predetermined diameter to pass without passing through nozzles smaller than the predetermined diameter, and the nozzle diameter confirmation mechanism (36) . In the filler pipe filler opening structure comprising the lock release mechanism (37) for releasing the lock of the lock mechanism (38) by the pressing force of the tip of the nozzle ,
The lock mechanism (38) is rotatably attached to a bracket (33) fitted to a pipe body (31) of the filler pipe (18), and is hooked on the shutter (34) to be engaged with the shutter (34). ) In a closed state, and a hook (51) that is rotated and switched between a locked state in which the shutter (34) is separated and an unlocked state in which the shutter (34) is unlocked, and the hook ( 51) and a spring (55) for biasing in a direction to hold the locked state,
The lock release mechanism (37) is attached to the release push member (58) to which the tip of the nozzle that has passed through the nozzle diameter confirmation mechanism (36) comes into contact and a pressing force is applied, and the shutter (34). The link member (61) rotatably supported by the link support member (62), the pressing force is applied via the link member (61), and the hook (51) is attached to the spring (55). A push rod (63) that rotates and switches from the locked state to the unlocked state against an urging force;
A filler pipe filler opening structure characterized by that.

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