JPH08142690A - Inlet pipe of fuel tank - Google Patents

Abstract

PURPOSE: To constitute an inlet pipe capable of properly and stably holding an oil feeding gun at low cost. CONSTITUTION: An oil feeding gun 10 is properly held by fastening a retainer 5 constituted of a press formed article of a plate material and having a base part 6 curved free to overlap on an inner peripheral surface of an opening part 4 of an inlet pipe 3 and a sectionally bent shaped elastic holding part 7 in the shaft center direction projected toward a shaft center part as well as extended to the deep side of the inlet pipe 3 from this base part on the inner peripheral surface of the opening part 4 of the inlet pipe 3 and sandwiching a head end part of the oil feeding gun 10 between the elastic holding part 7 and an inner periphery of the inlet pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel tank inlet pipe for an automobile, and more particularly to an inlet pipe capable of stably ensuring a proper holding state of a fuel gun.

[0002]

2. Description of the Related Art Generally, in an automobile, a fuel tank is arranged at a lower portion of a vehicle body, and an inlet box formed on a side surface of the vehicle body and a fuel tank are connected by an inlet pipe,
The tip of the refueling gun is inserted from the inlet box into the inlet pipe to inject fuel into the fuel tank.

Further, the refueling gun usually has a built-in automatic stop mechanism for stopping the refueling when the fuel is accumulated up to the tip thereof. At the time of refueling, the tip of the refueling gun is inserted and held in the inlet pipe, and the refueling gun is left unattended. Refueling as is.

By the way, as shown in FIG. 7, when the inlet pipe 21 is bent near the opening, the refueling gun 2
When the tip of 0 is inserted into the inlet pipe 21,
The tip of the fuel gun 20 contacts the inner wall surface of the inlet pipe 21, and the fuel gun 20 is positioned. At that time, as shown in FIG. 8, the inner wall surface of the inlet pipe 21 and the axial center of the tip of the fuel gun 20 are aligned. If the angle α formed by is more than 28 °, there is a problem that the auto stop mechanism may operate and fuel may not be supplied.

Therefore, various proposals have heretofore been made in which a restricting means for restricting the insertion position of the tip of the fuel gun 20 is provided near the opening of the inlet pipe 21. For example, in Japanese Utility Model Laid-Open No. 58-86726, as shown in FIG. 9, a mesh member for positioning the tip of the refueling gun 20 at the rear end of the cylindrical portion 23 fitted and fixed to the inner peripheral surface of the inlet pipe 21. A retainer 22 of the type in which 24 is provided and the position of which is regulated at the tip of the fuel gun 20 is disclosed.

Further, as shown in FIG. 10A, the tip of the fuel gun 20 is provided at the inner side of the large-diameter cylindrical portion 26 fitted and fixed to the inner peripheral surface of the inlet pipe 21 via the taper portion 26a. There is also known a retainer 25 of a type in which a guide cylinder portion 27 having a small diameter for inserting and holding is provided to regulate the insertion path of the tip portion of the fuel gun 20. In this retainer 25, as shown in FIG. 10B, the air vent hole 28 is formed in the tapered portion 26a in order to discharge the air as fuel is injected.
Are formed.

[0007]

However, in the retainer 22 shown in FIG. 9, the fixed position of the cylindrical portion 23 and the inlet pipe 21 due to spot welding or the like is structurally located near the opening of the inlet pipe 21, so that the refueling gun 20 is fixed. The insertion position of the fuel injection gun becomes shallow, the holding of the fueling gun 20 is likely to be unstable, and in order to hold it stably, it is necessary to make the length l of the cylindrical portion 23 large, which causes a problem of high cost. .

Further, in the retainer 25 shown in FIG. 10,
Since the guide cylinder portion 27 is adjusted to the diameter of the tip portion of the fuel gun 20, it is necessary to form the air vent hole 28 in the taper portion 26a as described above in order to discharge the air in the fuel tank as fuel is injected. However, there is a problem that the number of processing steps increases and the cost increases.

In view of the above conventional problems, it is an object of the present invention to provide an inlet pipe for a fuel tank, which can properly and stably hold a refueling gun and can be constructed at low cost.

[0010]

SUMMARY OF THE INVENTION The present invention comprises a press-formed product of a plate material, and a base portion which is curved so as to be superposed on the inner peripheral surface of the opening of the inlet pipe and extends from the base portion to the inner side of the inlet pipe. In addition, a retainer having an elastic holding portion having a V-shaped cross section in the axial direction, which projects toward the axial core portion, is fixed to the inner peripheral surface of the opening of the inlet pipe.

[0011]

According to the present invention, the retainer is formed by a press-formed product having good workability, and is composed of a curved base portion and an elastic holding portion having a V-shaped cross section, and is large between the inner periphery of the inlet pipe. Since a gap is formed and processing such as air vent holes is not required, it can be manufactured at low cost, and since the tip of the fuel gun is clamped between the elastic holding part and the inner circumference of the inlet pipe, an automatic stop mechanism is provided during refueling. It is possible to properly hold the refueling gun without the fear that it will operate, and the holding position will be at a position deep from the opening of the inlet pipe, so that it can be held stably.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

In FIG. 1, an inlet box 2 for refueling is recessed and formed at an appropriate position on the side surface of a vehicle body 1 of an automobile, and a fuel tank (not shown) disposed under the vehicle body is provided from the inlet box 2. The inlet pipe 3 is extended toward. The opening 4 of the inlet pipe 3 is formed to have a large diameter and is fixed to the inlet box 2 with its axis facing obliquely downward, and the upper end of the inlet pipe 3 is integrally joined to the opening 4 via the tapered portion 4a. Has been done. The inlet pipe 3 is connected to the fuel tank by being bent or bent as appropriate in order to avoid interference with the constituent members of the vehicle body.

Reference numeral 5 denotes a retainer made of a press-molded product of a plate material fixed to the opening 4 of the inlet pipe, and as shown in FIGS. 6 and an elastic holding portion 7 extending from the base portion 6 toward the inner side of the inlet pipe 3 and protruding toward the axial core portion and having a V-shaped cross section in the axial direction. Then, the base 6 of the retainer 5 is attached to the opening 4
Of the opening 4 and the taper portion 4a
Are fixed to each other by spot welding 8 at two points in a state in which they are engaged with the boundary portion of and are appropriately positioned in the circumferential direction.

In the above structure, the refueling gun 1 is used for refueling.
When the tip portion of 0 is inserted into the inlet pipe 3 through the opening 4 projecting into the inlet box 2, as shown in FIG. 1, the tip portion of the refueling gun 10 moves to the elastic holding portion 7 and the inner circumference of the inlet pipe 3. Since it is pinched between the refueling guns, the refueling gun 10 can be properly held without fear of the automatic stop mechanism being activated during refueling, and the pinching position is located deeper than the opening 4 of the inlet pipe 3 so that it can be held stably. can do. In this embodiment, since the inlet pipe 3 is curved downward, the fuel gun 10 is connected to the lower inner peripheral surface of the inlet pipe 3 and the retainer 5.
A retainer 5 is arranged at an upper position in the circumferential direction of the opening 4 so as to sandwich the tip portion.

The retainer 5 is a press-molded product having a curved base portion 6 and an elastic holding portion 7 having a V-shaped cross section in the axial direction. The retainer 5 and the inlet pipe 3 are also provided.
Since a large gap is formed between the retainer 5 and the inner circumference, it is not necessary to process air vent holes, etc., and it can be manufactured at low cost, and its retainer 5 is fixed to the large-diameter opening 4 by spot welding 8. Therefore, the mounting workability is good and the manufacturing cost is low.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described.

In this embodiment, since the inlet pipe 3 extends straight or is curved upward as shown by an imaginary line, the upper end of the inner peripheral surface of the inlet pipe 3 and the retainer 5 are connected to the tip of the fuel gun 10. The retainer 5 is arranged at a lower position in the circumferential direction of the opening 4 so as to be sandwiched.
In this way, when setting the arrangement position of the retainer 5 according to the inclination or bending direction of the inlet pipe 3, the opening 4
By moving the base portion 6 of the retainer 5 in the circumferential direction along the boundary between the taper portion 4a and the taper portion 4a, the retainer 5 can be easily positioned, and in this state, it can be fixed by spot welding 8 with good workability.

Further, in this embodiment, the flange portion 9 is formed so as to rise radially inward from the opening side edge of the retainer 5, and the spring 11 wound around the outer periphery of the tip portion of the fuel gun 10 is formed in this flange. It is configured so that it is possible to reliably prevent the refueling gun 10 from accidentally coming off due to being caught in the portion 10.

[0020]

As described above, according to the inlet pipe of the fuel tank of the present invention, the retainer is constituted by the press-molded product having the curved base portion and the elastic holding portion, and between the inner periphery of the inlet pipe. Since a large gap is formed and processing such as air vent holes is not required, it can be manufactured at low cost, and since the tip of the fuel gun is clamped between the elastic holding part and the inner circumference of the inlet pipe, an automatic stop mechanism during refueling It is possible to properly hold the refueling gun without the fear that it will operate, and the holding position will be at a position deep from the opening of the inlet pipe, so that it can be held stably.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an oil supply state of an inlet pipe according to an embodiment of the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a perspective view of a retainer of the same embodiment.

FIG. 4 is a vertical cross-sectional view showing an oil supply state of an inlet pipe according to another embodiment of the present invention.

5 is a view taken along the line BB of FIG.

FIG. 6 is a perspective view of a retainer of the same embodiment.

FIG. 7 is a perspective view showing a refueling state of a conventional inlet pipe.

FIG. 8 is an explanatory diagram of appropriate holding conditions for a fuel gun in a conventional example.

FIG. 9 is a vertical cross-sectional view showing a state of oil supply of another conventional inlet pipe.

FIG. 10 is a vertical cross-sectional view showing a lubrication state of another conventional inlet pipe.

[Explanation of symbols]

 3 Inlet pipe 4 Opening part 5 Retainer 6 Base part 7 Elastic holding part

Claims (1)

[Claims] 1. A base made of a press-formed product of a plate material, which is curved so as to be superposed on the inner peripheral surface of the opening of the inlet pipe, and extends from the base to the back side of the inlet pipe and projects toward the shaft core. An inlet pipe for a fuel tank, comprising: a retainer having an elastic holding portion having a V-shaped cross section in the axial direction, which is fixed to an inner peripheral surface of an opening of the inlet pipe.