JP3387334B2 - Automotive fuel filler structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle fuel filler port structure.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional fuel refueling structure for an automobile. Reference numeral 1 is a filler tube, and a vessel 5 is formed by joining an opening end of a neck portion 2 to a peripheral edge of an opening portion 4 of a vehicle body outer plate 3.
It is arranged so as to project inside and is joined at the penetrating portion of the vessel 5.

A screw portion 6 is formed on the inner circumference of the open end of the neck portion 2 so that a filler cap (not shown) is screwed and fixed.

The refueling nozzle 7 has different diameters for unleaded gasoline and leaded gasoline, and in vehicles with unleaded gasoline specifications, it is permissible to insert a small diameter unleaded gasoline nozzle in the middle of the neck portion 2. However, a shutter plate 8 having a nozzle insertion regulation hole 9 whose diameter is set so that a large-diameter leaded gasoline nozzle cannot be inserted is arranged.

The refueling nozzle 7 has a spiral wire 10 arranged on the outer periphery of its base portion. When refueling fuel, the refueling nozzle 7 is inserted into the neck portion 2 so that the spiral wire 10 is inside the opening end of the neck portion 2. By engaging with the threaded portion 6 of the circumference, it can be held at the opening edge of the neck 2, that is, at the fuel supply port edge.

[0006]

The filler tube 1 needs to have a large diameter to some extent so that the refueling nozzle 7 can be easily inserted into the fuel supply port of the neck portion 2 of the filler tube 1. In order to avoid air pollution due to the outflow of evaporated fuel, the filler tube 1 needs to have a diameter as small as possible so that a gap between the inner circumference of the filler tube 1 and the liquid column of the fuel flowing by refueling does not occur. Therefore, as shown in FIG. 3, the neck portion 2 of the filler tube 1 has a large diameter to secure the insertability of the refueling nozzle 7, and the tube general portion 1a is filled with the fuel flowing through the inside thereof as indicated by a phantom line. It is desirable to make the diameter small so that no gap is created between the liquid column and the liquid column.

However, when the general tube portion 1a has a small diameter, when the refueling nozzle 7 is inserted into the nozzle insertion regulating hole 9 of the shutter plate 8, the tip of the refueling nozzle 7 interferes with the inner peripheral surface of the general tube portion 1a. Then, the contact point between the inner peripheral surface of the tube main portion 1a of the fuel supply nozzle 7, and the vertical direction of the swing motion of the filling nozzle 7 in the contact point with the nozzle insertion restricting hole 9 edges is restricted, the fuel supply nozzle 7 The spiral wire 10 on the outer circumference of the base cannot be engaged with the threaded portion 6 of the fuel filler port edge, and the retaining property of the fuel filler nozzle 7 is impaired.

Therefore, in order to secure the holding property of the oil supply nozzle 7, the tube general part is connected to the neck part 2 of the tube general part 1a as shown in FIG. It is necessary to form the enlarged diameter portion 1b having a diameter slightly larger than the diameter so that the swinging movement of the refueling nozzle 7 in the vertical direction can be permitted. As a result, the enlarged diameter portion 1b and the tube general portion 1a are required. At the step portion of the continuous connection portion with the oil supply nozzle 7
The flow resistance of the fuel flowing out from the tank increases, which causes a problem of impairing refuelability.

Therefore, the present invention provides a fuel filler port structure for an automobile, which can reduce the diameter of the filler tube without deteriorating the fuel refueling property and can prevent air pollution during refueling. .

[0010]

According to a first aspect of the present invention, a thread portion for screwing a filler cap is formed on the inner circumference of the opening of the neck portion of the filler tube, and the opening end is formed in the middle portion of the neck portion. A shutter plate having a nozzle insertion regulation hole for regulating the insertion of the oil supply nozzle that is inserted and engaged with and held by the screw portion is provided, and the general tube portion following the neck portion is formed to have a smaller diameter than the neck portion. The structure has a structure in which the nozzle insertion restriction hole of the shutter plate is formed as a vertically long hole that allows vertical swinging movement of the inserted oil supply nozzle, and the center of the tube general portion.
Offset the line from the centerline of the neck and
Above the taper part where the neck part and the general tube part are connected
The feature is that the side slope is increased .

According to a second aspect of the present invention, the screw portion and the shutter plate according to the first aspect are provided on the inner tube fitted and fixed in the neck portion of the filler tube.

[0012]

According to the first aspect of the present invention, since the tube general portion of the filler tube is formed to have a smaller diameter than the neck portion, the gap between the inner periphery of the tube general portion and the liquid column of the fuel flowing by refueling is provided. It is, of course, possible to prevent a gap from being generated in the fuel cell and prevent the evaporative fuel from flowing out from the fuel filler port.
Since the nozzle insertion restricting hole of the shutter plate arranged in the neck portion is formed as a vertically long hole that allows the vertical swinging motion of the inserted oil supply nozzle, the inserted oil supply nozzle is a general tube part. It is possible to freely swing in the vertical direction without being restricted by the inner peripheral surface of the nozzle and the nozzle regulating hole of the shutter plate. The refueling nozzle can be securely engaged and held with the threaded portion on the inner circumference of the opening end of the neck without forming an enlarged diameter portion for allowance. It is possible to achieve both.

According to the second aspect, in addition to the effect of the first aspect, since the screw portion and the shutter plate are provided in the inner tube fitted and fixed in the neck portion of the filler tube, these screw portions and The shutter plate can be easily provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below in detail with reference to the drawings by attaching the same reference numerals to the same parts as those in the conventional structure.

In FIGS. 1 and 2, 11 is a filler tube, the neck 12 of which has a large diameter so that the refueling nozzle 7 can be easily inserted, and the opening end of the neck 2, that is, the fuel refueling port end. Is projectingly arranged in the vessel 5 joined to the peripheral edge of the opening 4 of the vehicle body outer plate 3 and joined at the penetrating portion of the vessel 5.

Further, the tube general portion 11a following the neck portion 12 of the filler tube 11 has no gap between it and the liquid column of the fuel which is replenished from the refueling nozzle 7 inserted into the fuel refueling port and flows inside. The diameter is smaller than that of the neck portion 12.

The connecting portion of the neck portion 12 and the tube general portion 11a is formed in a tapered shape so that the tip of the nozzle portion 7 does not catch when the nozzle 7 is inserted. The center line of the general portion 11a is offset below the center line of the neck portion 12 so that the inclination of the taper portion on the upper side is increased.

A screw portion 13 for screwing and fixing a filler cap (not shown) is provided on the inner circumference of the open end of the neck portion 12, and only a specific fueling nozzle 7 can be inserted into the middle portion of the neck portion 12. The shutter plate 14 having the nozzle insertion restriction hole 15 whose diameter is set as described above is provided. In this embodiment, the screw portion 13 and the shutter plate 14 are fitted in the neck portion 12. It is provided on the inner tube 16 that is joined and fixed.

The nozzle insertion restriction hole 15 of the shutter plate 14 is a vertically elongated hole, that is, a short diameter so that the refueling nozzle 7 inserted in the nozzle insertion restriction hole 15 can be swung in the vertical direction. As described above, is formed in a vertically long shape with a predetermined diameter into which only the specific oil supply nozzle 7 can be inserted.

According to the structure of the above embodiment, the general tube portion 11 following the neck portion 12 of the filler tube 11
Since a is formed with a diameter smaller than that of the neck portion 12 so as to prevent a gap from being formed between the liquid column of the fuel that is refueled from the refueling nozzle 7 and flows inside, the inner peripheral surface of the general tube portion 11a A gap is unlikely to form between the fuel column and the flowing fuel liquid column, and it is possible to avoid evaporative fuel from leaking through this gap and flowing out from the fuel refueling port. Can be prevented.

Further, at the time of refueling fuel, the refueling nozzle 7 is inserted into the fuel refueling port at the end of the neck portion 12 and the neck portion 1
When it is inserted into the nozzle insertion regulating hole 15 of the shutter plate 14 arranged in the middle portion of the nozzle 2, the nozzle insertion regulating hole 15 is formed as a vertically elongated hole to allow the refueling nozzle 7 to swing vertically. Since it can be freely performed, the refueling nozzle 7 is swung in the vertical direction so that the spiral wire 10 provided on the outer periphery of the base portion of the refueling nozzle 7 is securely engaged with the screw portion 13 on the inner periphery of the opening end of the neck portion 12. Can be held.

Therefore, the refueling nozzle 7 is connected to the neck portion 12 of the general tube portion 11a without forming an enlarged diameter portion for allowing the swinging movement of the refueling nozzle 7 in the vertical direction. Since the tube general portion 11a can be securely engaged and held at the rim, and a step which becomes the oil supply resistance due to the large diameter change portion does not occur in the tube general portion 11a, the retention property of the oil supply nozzle 7 can be secured and the oil supply property can be improved at the same time. Can be planned.

Further, in this embodiment, the neck portion 1
Since the above-mentioned screw portion 13 and shutter plate 14 are provided on the inner tube 16 which is fitted and fixed inside 2,
The screw portion 13 and the shutter plate 14 can be easily arranged on the neck portion 12.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a view taken along the line AA of FIG.

FIG. 3 is a sectional view showing a conventional structure.

[Explanation of symbols]

7 Refueling nozzle 11 Filler tube 11a Tube general part 12 neck 13 screw part 14 Shutter plate 15 Nozzle insertion restriction hole 16 inner tubes

Claims (2)

(57) [Claims] 1. A screw portion for screwing a filler cap is formed on an inner circumference of an opening end of a neck portion of a filler tube, and the intermediate portion of the neck portion is inserted from the opening end to be engaged with and held by the screw portion. A shutter plate provided with a nozzle insertion regulation hole for regulating the insertion of the oil supply nozzle is provided, and
It has a structure in which a general tube portion following the neck portion is formed with a diameter smaller than that of the neck portion, and the nozzle insertion regulating hole of the shutter plate can allow vertical swinging movement of the inserted oil supply nozzle. Formed in a vertically long hole,
Offset the center line of the general part from the center line of the neck part
Let's say that these neck parts and the tube general part are connected to each other.
A fuel filler port structure for an automobile, characterized in that the upper side of the taper portion of the is increased . 2. The fuel filler opening structure for an automobile according to claim 1, wherein the screw portion and the shutter plate are provided on the inner tube fitted and fixed in the neck portion of the filler tube.