JPS637533Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of the filler pipe attachment structure of a fuel tank.

Conventionally, in the case where a plate fixed to a filler pipe etc. was fixed to a fuel tank by screwing, the filler pipe 1 was fixed as shown in Fig. 1 depending on the shape of the opening of the fuel tank. A wide annular seal member 5 made of an elastic material is inserted between the fixed plate 2 and the retainer 4 fixed to the fuel tank 3, and fixed with screws 6, or as shown in FIG. An O-ring-shaped seal member 5' is inserted between the fuel tank 3' and the vicinity of the opening edge of the fuel tank 3', and secured with a screw 6'. 1′
is a filler pipe, and 4' is a retainer. However, in these conventional structures, the seal portion is located at one point, P or P', so that external forces such as when the vehicle collides with the fuel tank mounted on the vehicle or There is a risk that the filler pipe, etc. will move and the fuel filler port of the fuel tank, that is, the plate attachment part, will deform and cause fuel to leak from that part. Alternatively, the absorption was done at the attachment point between the inlet of the filler pipe and the vehicle body, but in both cases, the structure is complicated and the installation work is troublesome, and the installation work takes time. It was hot.

Therefore, the present invention was developed in view of the above-mentioned conventional problems, and the fuel tank mounted on the vehicle or the filler pipe, etc. moves due to external force such as a collision, and the filler port of the fuel tank becomes deformed. Even if this happens, fuel leakage from the fuel tank can be prevented.For this reason, in the present invention, the filler pipe is fitted and fixed, and a bead is provided in the circumferential direction on the outside of the fitting hole. The plate covers the pipe attachment opening of the fuel tank, screw holes are provided on the outside of the bead of the plate and the periphery of the fuel tank opening, and a sealing member is interposed between the plate and the periphery of the fuel tank opening. The intended purpose is achieved by providing a sealing structure in which the plate is screwed to the periphery of the opening of the fuel tank at the screw hole position.

Hereinafter, the present invention will be described in detail with reference to illustrative embodiments.

11 is a fuel tank, 12 is a filler pipe, and the tip of the filler pipe 12 on the side of the filler pipe attachment opening 13 of the fuel tank 11 is provided with a pipe so as to cover the periphery of the opening 13 of the fuel tank 11; A plate 14 is fixed to the periphery of the opening 13 by means such as welding, and the plate 14 is fixed to the periphery of the opening 13 of the fuel tank 11 with screws. A bead 15 is formed in the circumferential direction between the plate 1 and the filler pipe 12.
A holding frame 16 is formed on the outer peripheral edge of 4 and is raised upward. 17 is a retainer whose outer periphery is caulked 18 so that the opening 1 of the fuel tank 11
It is fixed to the upper surface near the periphery of 3 by welding or the like.
17a is a screw hole drilled in the retainer 17.

The plate 14 is attached to the fuel tank 11 through a gap formed between the plate 14 and a flange 11a formed at the inner end of the retainer 17 and the edge of the opening 13 of the fuel tank 11, and the retainer 17. In the gap formed between the upper surface and the holding frame 16 of the plate 14, O-rings 19 and 20 each made of an elastic body and serving as a sealing member are interposed,
Tighten with screw 21.

As a result, even if the filler pipe 12 receives an external force, the plate 14 that closes the opening 13 of the fuel tank 11 will be able to maintain the bead 15 provided along the outer periphery of the filler pipe 12.
2 expands and contracts to absorb external force, so the influence of the inner O-ring 19 on the sealing part is small; Even if the sealing effect of the inner O-ring 19 is degraded due to deformation of the inner O-ring 19, fuel leakage can be prevented since the outer O-ring 20 provides a seal.

In the above embodiment, the sealing member was configured to seal the inside and outside of the retainer screw stopper (which becomes the plate locking part) using two O-rings.
As shown in FIG. 7, in the case where the retainer 17' is fixed near the periphery of the opening 13' of the fuel tank 11' by welding or the like, one end is placed along the outer periphery of the retainer 17' as a sealing member, and , a sealing member 22 made of a wide annular elastic body having a flange 22a extending downward is attached to the plate 1.
4' and the retainer 17', and a holding frame 16' is bent downward on the outer peripheral edge of the plate 14' so as to be in contact with the flange 22' of the sealing member 22. Holding frame 16' and retainer 1
7' and the flange 22a of the sealing member 22 to seal the outside of the screw 21', and the inside is a screw 2 for fixing the plate 14'.
It is integrally formed to the inside of 1' to form a sealing part.
Even if an external force is applied to the filler pipe 12' and the external force is large enough to deform the plate 14' and reduce the sealing action of the flange portion 11a' of the tank 11', the sealing member extending to the outer end of the retainer 17' Since the 22 flanges 22a are sandwiched and sealed between the retainer 17' and the holding frame 16',
Fuel leakage can be prevented. 14a' is a screw hole drilled in the plate 14', 17a' is a screw hole drilled in the retainer 17', and 22b is a screw hole drilled in the seal member 22. In the illustration, two beads 15' are formed on the plate 14', but one bead 15' may be formed as in the first embodiment, or
Beads 15 are placed on the plate 14 of the first embodiment,
Two may be formed as in the embodiment, and the number is determined as appropriate depending on the relationship between the diameters of the openings 13, 13' of the fuel tanks 11, 11' and the outer diameters of the filler pipes 12, 12'. be able to.

As described above, according to the present invention, the plate is adapted to close the filler pipe attachment opening of the fuel tank and has the tip of the filler pipe fitted and fixed in the filler pipe fitting hole. Since screws were secured to the periphery of the opening and a bead was formed in the circumferential direction between the screw hole drilled in the plate and the filler pipe, the filler pipe could not move due to external force such as a collision with the filler pipe. However, the movement can be absorbed by the expansion and contraction deformation of the bead. Therefore,
There is no risk of fuel leakage as there is less impact on the sealing part.

In addition, according to the present invention, the seal part has a double seal structure on the inside and outside of the plate locking part, so a large external force that cannot be absorbed by the bead of the plate fixed to the filler pipe is applied, and the inner seal Even if the sealing function of the inner side deteriorates due to deformation of the part, the outside of the plate fixed with screws will not be deformed and the plate will be sealed with the outer seal part provided on the outside of the plate. Therefore, fuel leakage can be prevented, and the above effects can be made more reliable.

[Brief explanation of the drawing]

Figures 1 and 2 are partially enlarged side sectional views showing the conventional fuel tank seal structure, Figure 3 is an external side view showing the seal position of the fuel tank, and Figure 4 is the fuel tank seal structure according to the present invention. FIG. 5 is an enlarged perspective view showing how the plate is attached to the filler pipe. FIG. 6 is a partially enlarged side sectional view showing the state when the inner seal portion of FIG. 4 is deformed. , FIG. 7 is a partially enlarged side sectional view showing another embodiment of the present invention. 11, 11' are fuel tanks, 12, 12' are filler pipes, 14, 14' are plates, 15, 1
5' is a bead, 16, 16' are holding frames, 19, 20
22 is an O-ring, 22 is a sealing member, and 22a is a flange.

Claims (1)

[Scope of utility model registration request] The tip of the filler pipe is fitted and fixed in the filler pipe fitting hole, and the filler pipe fitting opening of the fuel tank is covered with a plate having a bead formed in the circumferential direction on the outside of the filler pipe fitting hole. The outside of the bead of the plate and the periphery of the opening are fastened with screws, and a sealing member is interposed between the inside of the screw and the bead and the outside of the screw between the plate and the periphery of the opening. 1. A structure for attaching a filler pipe of a fuel tank, characterized in that the periphery of the opening is sealed with the sealing member over the entire circumference.