JPH05305888A - Cap device of fuel tank - Google Patents

Abstract

PURPOSE:To provide a cap device of a fuel tank that is inexpensive in cost and able to set appearance specifications optionally. CONSTITUTION:In a cap device 5 covering a fuel filler hole 3 being attached to a recess 4 installed in a top face 1 of a fuel tank and installed in a central part of this recess, a cap 6, closing this fuel tank filler hole 3 is connected to a bracket 21 installed in the recess 4 via a hinge part 20, while a ring member 7, covering the hinge part from the upside and also covering an outer peripheral part of the cap 6 along an inner circumferential surface of the recess part 4, is clamped to the recess 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cap device mounted on a fuel inlet of a fuel tank of a motorcycle or the like.

[0002]

2. Description of the Related Art In a fuel tank of a motorcycle or the like, a tank body is usually provided with a recess surrounding the fuel injection opening, and a cap for closing the fuel injection opening can be opened and closed in the recess. It is provided in. The cap has a built-in breathing mechanism for maintaining the tank internal pressure at atmospheric pressure.

For example, Japanese Patent Laid-Open No. 61-200074 discloses a fuel tank cap device as shown in FIG. In the figure, 01 is an upper plate of the fuel tank, 02 is a fuel injection port, and a recess 03 is formed around the injection port. An annular member 04 is formed on the upper part of the recess 03 along the inner peripheral wall of the upper plate.
Provided flush with 01 and recessed by bolt 05 and nut 06
It is fixed to the bottom of 03.

A cap 07 for closing the fuel injection port 02 is swingably attached to the annular member 04 via a pivot 08, and in the closing device shown in the figure, the lower part of which is fitted into the fuel injection port 02, a locking device is provided. It is designed to be locked from the inside by 09.

[0005]

In the above conventional cap device, since the cap 07 is supported by the annular member 04, the annular member 04 has a structure for increasing rigidity and a material having high strength such as aluminum alloy. Need, and therefore the cost of the cap device is high.

Further, particularly in a fuel tank of a motorcycle, this cap has a great meaning as an appearance decoration part, and the annular member and the cap are respectively colored in various colors,
The appearance is finished and these are appropriately combined to give various appearances to each vehicle. By the way, in the above-mentioned conventional cap device, since the cap and the annular member have to be assembled in advance and this has to be attached to the fuel tank, a large number of cap-annular member assembly bodies are required for each combination of color and appearance. It is necessary to prepare and select a desired combination from the above and mount it on the tank, which complicates parts management.

[0007]

The present invention has been made in view of the above circumstances, and in the present invention, it is mounted in a recess provided on the upper surface of a fuel tank and provided in the center of the recess. In the cap device for covering the fuel inlet, a cap for closing the fuel inlet is coupled to a locking portion provided in the recess via a hinge, and the hinge is covered from above and along the inner peripheral surface of the recess. An annular member covering the outer peripheral portion of the cap is fixed in the recess.

According to the present invention, since the cap and the annular member are separately attached to the fuel tank, and the annular member does not need to support the cap, strength is not particularly required and therefore an inexpensive material can be used. Therefore, the cost is reduced.

Further, it is not necessary to prepare and manage a large number of cap-annular member assemblies for each combination of color and appearance in advance, and a cap and an annular member having an appropriate color and appearance can be selected when mounting on a fuel tank. Parts management is simplified because it can be installed with.

[0010]

EXAMPLE FIG. 2 is a sectional view showing a cap device for a fuel tank for a motorcycle according to an embodiment of the present invention. 1
Is a top plate of the fuel tank, and has a circular opening 1a, and the base 2 is welded to the opening. The mouthpiece 2 is formed along an outer peripheral wall portion 2a extending downward from the upper plate 1 toward the inside of the tank, an annular bottom wall portion 2b connected to the outer peripheral wall portion 2a, and an inner peripheral edge of the bottom wall portion. The inner peripheral wall portion 2c is projected and then bent and extended downward. The base 2 constitutes a fuel injection port 3 by the inner peripheral wall portion 2c, and a concave portion 4 recessed from the upper plate 1 to the upper outer peripheral portion of the fuel injection port 3.
Is formed. A cap device 5 including a cap 6 and an annular member 7 is mounted in the recess 4.

The cap 6 includes a front plate part 8, a main body part 9 attached to the front plate part 8, and a cylindrical part 10 slidably fitted on a cylindrical peripheral surface of the main body part 9. And consists of. The tubular piece 10 has a spring 11 inserted between the tubular piece 10 and the body piece 9.
Is urged downwards by and is supported from below by a packing 12 attached to the main body part piece 9. As shown in the figure, the tubular portion 10 abuts on the upper protruding portion of the inner peripheral wall portion 2c of the mouthpiece 2 through the packing 12 to close the fuel injection port 3.

A cylinder lock 13 is provided at the center of the main body piece 9, and by operating this with a key (not shown), the lock piece 14 projects outward in the radial direction,
It engages with the lower end of the inner peripheral wall portion 2c of the mouthpiece 2 and locks the cap 6 at the illustrated closed position. The key insertion port of the cylinder lock 13 is usually covered by a lid piece 15 that can be opened and closed.

A breather passage 16 communicating with the atmosphere is formed in the body portion 9. The breather passage 16 communicates with the inside of the tank via a relief valve 17, and when the tank internal pressure rises, the relief valve 17 opens and the gas in the tank is released to the atmosphere through the breather passage 16. Furthermore, a thin breathing passage 18 is provided in the valve body of the relief valve 17, and the breather passage 16 is always communicated with the tank through the breathing passage 18. In this way, the inside of the tank is kept at atmospheric pressure. The breather passage 16 is also in communication with the tank via a check valve 19 at a position lower than the relief valve 17, and the liquid accumulated in the breather passage 16 is returned to the tank through the check valve 19. ..

The cap 6 configured as described above is openably and closably coupled to the bottom wall portion 2b of the mouthpiece 2 forming the recess 4 via the hinge portion 20. The hinge part 20 is configured as follows (see FIG. 3). That is, the bottom wall portion 2b
A pair of brackets 21 and 21 are fixed to each other by a bolt 22 and a nut 23 and project into the recess 4.
A shaft 24 is passed between them. The tip of a hook-shaped extending portion 8a formed at one end of the front plate piece 8 of the cap 6 is pivotally attached to the shaft 24. The entire cap 6 unlocked by the lock piece 14 is moved from the closed position in FIG.
By turning upwards around the fuel inlet 3
Is opened, and fuel is injected into the tank through the fuel injection port 3 in this state. FIG. 6 is a side view of the cap 6 alone.

The annular member 7 is disposed along the annular space between the outer peripheral edge of the cap 6 and the inner peripheral edge of the recess 4 in the upper portion of the space, the upper surface of which is substantially flush with the upper surface of the cap 6. ing. The annular member 7 has a bottom portion of the concave portion 4, that is, a bottom wall portion 2b of the base 2 through a plurality of leg portions 25 protruding from the back surface.
The bottom wall portion 2b is placed on the bottom wall portion 2b and penetrates the leg portion 25 vertically.
It is fixed to the bottom wall portion 2b by a bolt 26 projecting downward and a nut 27 screwed to the threaded portion of the bolt 26. FIG. 5 is a partial side view of the annular member 7 alone.

The hinge portion 20 is covered above by the annular member 7, but the cap 6 is pivotally attached to the shaft 24 through the hook-shaped extending portion 8a of the front plate portion 8.
As shown by the chain line in FIG. 1, it can be freely opened and closed without interfering with the annular member 7.

The cap 6 and the annular member 7 mounted in the recess 4 as described above are shown in FIG.
They are concentric as shown in. Therefore, by changing the appearance of the upper surface of the cap 6 such as the color and the appearance of the upper surface of the annular member 7 such as the color, a unique decorative effect can be obtained in contrast to each other, and the cap 6 of each color is different.
If the annular member 7 is prepared in advance, it is possible to give various aesthetics depending on the vehicle by appropriately combining these. Since the cap 6 and the annular member 7 are individually attached to the concave portion 4, it is only necessary to select and attach an appropriate cap 6 and the annular member 7 each time, and the cap 6 and the annular member 7 are assembled in various color combinations. It is not necessary to prepare a large number of the attached ones in advance.

Also, the annular member 7 is mounted in the recess 4 by itself, and no large force acts on it. Therefore, the cost of the cap device can be reduced by making the material of the annular member 7 relatively inexpensive and inexpensive.

7 to 10 show each modification of the leg portion structure of the annular member 7. Although the leg portion 25 is integrally formed in the annular member 7 in the above-described embodiment, in FIG. 7, the leg portion piece 28 which is separate from the annular member 7 is formed at the upper end portion thereof, so that the screw portion 29 is bolted. The annular member 7 is formed by screwing 30 together.
A nut 27 similar to the above is screwed into a male screw portion 31 which is fixed to the leg portion 28 and projects from the lower end of the leg portion piece 28. Figure 8 shows leg pieces
FIG. 28 is a perspective view of 28.

9 and 10, leg pieces 28a and 28b similar to the leg piece 28 are applied, but these leg pieces 28a and 28b are replaced by the flange 31 instead of the male screw portion 31. Part 32
a and 32b are provided, and in FIG. 9, the leg piece 28a is provided.
After being inserted into the hole of the bottom wall portion 2b of the base 2 from below, the flange portion 32a is welded to the lower surface of the bottom wall portion 2b, and the flange portion 32b is brought into contact with the upper surface of the bottom wall portion 2b in FIG. Welded to the upper surface.

[0021]

According to the present invention, the cap and the annular member are individually attached to the fuel tank, and the annular member does not need to support the cap and does not require any particular strength.
Therefore, the annular member can be made thin and lightweight, and an inexpensive material such as a resin material can be used, so that the cost is reduced.

Further, various decorative effects can be obtained by variously changing the combination of appearances such as colors of the cap and the annular member. Further, in this case, when the cap and the annular member are attached to the fuel tank, various appearances of the cap and the annular member can be obtained. Appropriate ones can be selected from the annular members and attached, and the appearance specifications can be set arbitrarily. Moreover, since it is not necessary to prepare a large number of types of assembly of the cap and the annular member for each combination of appearances in advance, component management becomes simple and easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a conventional cap device.

FIG. 2 is a sectional view of a cap device according to an embodiment of the present invention.

FIG. 3 is a view of a hinge portion of the cap device as viewed from the left side of FIG. 1.

FIG. 4 is a top view of the cap device.

FIG. 5 is a partial side view of the annular member.

FIG. 6 is a side view of the cap.

FIG. 7 is a cross-sectional view showing a modified example of the leg portion of the annular member.

FIG. 8 is a perspective view of a leg piece of the modified example.

FIG. 9 is a cross-sectional view showing another modification of the leg portion of the annular member.

FIG. 10 is a cross-sectional view showing still another modified example of the leg portion of the annular member.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Upper plate, 2 ... Base, 3 ... Fuel injection port, 4 ... Recess, 5 ...
Cap device, 6 ... Cap, 7 ... Annular member, 8 ... Front plate part piece, 9 ... Main body part piece, 10 ... Cylindrical part piece, 11 ... Spring,
12 ... Packing, 13 ... Cylinder lock, 14 ... Lock piece, 15 ...
Lid piece, 16 ... Breather passage, 17 ... Relief valve, 18 ... Breathing passage, 19 ... Check valve, 20 ... Hinge portion, 21 ... Bracket, 22 ... Bolt, 23 ... Nut, 24 ... Shaft, 25 ... Leg portion , 26
Bolts, 27 ... nuts, 28 ... leg pieces, 29 ... female threads, 30 ...
Bolts, 31 ... Male thread, 32 ... Flange.

Claims (1)

[Claims] 1. A cap device, which is mounted in a recess provided on an upper surface of a fuel tank and covers a fuel injection port provided in a central portion of the recess, wherein a cap for closing the fuel injection port is provided at a locking portion provided in the recess. A cap device for a fuel tank, characterized in that an annular member, which is coupled through a hinge and covers the hinge from above and covers an outer peripheral portion of the cap along an inner peripheral surface of the concave portion, is fixed to the concave portion. ..