JP2522376Y2 - Vehicle fuel tank device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a vehicle fuel tank device in which a chamber (sub tank) is fixed in a plastic tank.

(Prior Art) Generally, a fuel tank for a vehicle is provided with a chamber (sub-tank) surrounding a fuel inlet, whereby a fuel level fluctuates when the vehicle turns, brakes, runs on a slope, and the like. The fuel inlet is always immersed in the liquid to prevent air from being mixed even when the fuel inlet is tilted or inclined, so that the fuel supply is not hindered.

Incidentally, recently, plastic fuel tanks are often used for weight reduction and the like, and in that case, various methods have been tried as a method of mounting a chamber in the tank. For example, as one of the general methods, there is a method in which a rail-shaped bracket is welded to the inner surface of the bottom of the tank and a chamber having a groove that fits into the bracket is fitted so as to be fitted.

Further, as described in, for example, JP-A-62-193952, there is known an apparatus in which a chamber is fixed to a tank by screws attached from the outside. In the publication, a flange-shaped mounting piece is provided integrally with the chamber near the bottom of the chamber, and the mounting piece and the bottom of the tank are fixed with mounting screws from the outside of the tank. The inner surface of the head of the screw and the lower surface of the mounting piece are thermally melted by heating.

Furthermore, as described in Japanese Utility Model Application Laid-Open No. 61-174334, a hole is formed on the bottom of the chamber with a projection having a constricted portion formed on the bottom of the tank, and the tank is pushed in and engaged.

In some cases, a chamber is provided at the bottom of the tank by integral molding.

(Problems to be Solved by the Invention) However, in the above-described conventional method, the workability is poor because the bracket must be welded inside the tank, or a projection having a constricted portion inside the tank is attached to the bottom of the chamber. Since the holes are pushed in and engaged with each other, there is a problem that the mounting workability is not good, or the rigidity of the tank is reduced due to a decrease in the thickness of the bent portion of the chamber provided integrally with the bottom of the tank.

The present invention has been made in view of the above problems,
The structure is simple, the chamber in the tank can be fixed easily and securely, and without reducing the rigidity,
It is another object of the present invention to provide a vehicle fuel tank device that does not cause fuel leakage.

(Means for Solving the Problems) A fuel tank device for a vehicle according to the present invention is configured by inserting and fixing a chamber from an opening inside a plastic integrally molded tank body. A first bead fitted into the chamber when the chamber is inserted and fixed in a direction perpendicular to the insertion direction;
When the inserted chamber reaches a fixed position, a second bead portion that fits and is fixed in the insertion direction is provided,
It is characterized in that the chamber inserted from the opening is sandwiched and fixed between these beads.

(Operation) In the present invention, the tank body is integrally formed of plastic. Then, the chamber is inserted into the tank main body from the opening. The chamber is fitted in the first bead portion of the tank body and fixed in a direction orthogonal to the insertion direction, and is fitted in the second bead portion in a fixed position and fixed in the insertion direction. Thus, the chamber is fixed inside the tank by being sandwiched between the beads. Therefore, a bracket or the like for fixing the chamber is not required, and since there is no risk of fuel leakage because a hole is not made in the tank, it is possible to sandwich the tank between the upper and lower beads by simply pushing in the insertion direction. be able to. Further, the rigidity of the tank body is improved by the bead portion, and the rigidity of the entire tank is also improved by sandwiching the chamber between the upper surface and the lower surface of the tank.

(Example) Hereinafter, an example is described based on drawings.

FIG. 1 is a side view of a vehicular tank device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.

In this embodiment, a plastic tank body 1 integrally formed by blow molding is formed in a flat shape in which a part of the center is lifted up in a front view and flattened to both sides. One side of the bottom wall 2 has a substantially planar bottom wall 2 and a side wall 3 rising vertically from one side of the bottom wall 2.
And end walls 4, 4 which also rise vertically from both ends, and an upper wall 5 having a concave central portion in a side view.
An opening 6 is provided on one side of the upper wall 5 at a position closer to the rear (right side in FIG. 1) of the upper wall 5. Further, two bead portions 7, 7 protruding inwardly of the tank body 1 are provided in the front-rear direction at the left and right positions substantially at the center of the bottom wall 2 on the one side of the tank body 1. Further, bead portions 8, 8, which also protrude inward of the tank body 1, are provided at a position slightly closer to the front and slightly closer to the rear of the bottom wall 2. Furthermore, a bead portion 9 is provided at substantially the center of the upper wall 5 and located substantially at the center of the bead portions 7, 7; 8, 8, and protrudes inward of the tank body 1. The right and left bead portions 7, 7 at the approximate center of the bottom wall 2 and the bead portion 9 at the approximate center of the upper wall 5
Corresponds to the first bead part of claim 1, and the front and rear bead parts 8, 8 of the bottom wall 2 correspond to the second bead part of claim 1.

On the other hand, as shown in FIG. 3, the chamber (sub-tank) 10 has a shape in which the rear end of a flat rectangular box is bent upward, and a pump insertion hole 11 is provided in the upper end of the rear end. Have been. The chamber 10 is sized so that it can be inserted into the tank body 1 through the opening 6 provided in the tank body 1, and the front end has a thickness between the upper wall 12 and the bottom wall 13 of the tank body 1. The distance between the inner surface of the concave portion of the upper wall 5 and the inner surface of the bottom wall 2 opposed thereto is set to be substantially the same. Further, the chamber 10 is provided at positions respectively corresponding to the bead portions 7, 7; 8, 8; 9 formed on the bottom wall 2 and the upper wall 5 of the tank body 1, that is, on both side walls 14, At a total of five places: a corner between 14 and the bottom wall 13, a corner between the front and rear end walls 15, 15 and the bottom wall 13, and a central part of the top wall 12,
Each has a bead portion 16, 16; 17, 17; 18 which protrudes inward of the chamber 10 and therefore has a concave outer surface side.

When the chamber 10 is fixed to the inside of the tank main body 1 in the above-described configuration, first, as shown by a two-dot chain line in FIG. Insert from. Then, while being pressed to slightly deform the tank body 1 elastically, the bead portions 7, 7; 9 formed on the bottom wall 2 and the upper wall 5 of the tank body 1 are attached to both side walls 14, 14 of the chamber 10 and the bottom. Corner between wall 13 and upper wall 1
The chamber 10 is inserted so that the bead portions 16, 16, and 18 formed in the center of 2 are fitted respectively. The bead portions 17, 17 formed at the corners between the end walls 15, 15 at the front and rear of the chamber 10 and the bottom wall 13 are connected to the front and rear bead portions 8, 8, formed at the bottom wall 2 of the tank body 1. The chamber 10 is fixed at a fixed position of the tank body 1 by being fitted. In the chamber 10 fixed in this way, a fuel tube 19 is provided.
The pump 20 and the filter 21 connected to are inserted.

As described above, in the present embodiment, the chamber 10 is simply inserted from the opening 6 of the tank body 1 and pushed in.
The chamber 10 can be fixed to the inner surface of the tank body 1 by sandwiching the chamber 10 between beads 7, 8, 9 formed on the bottom wall 2 and the upper wall 5 of the tank body 1. Therefore, a bracket for fixing the chamber is unnecessary, and bead portions 7, 8, and
9, the rigidity of the tank body 1 is improved, and the rigidity of the entire fuel tank is increased by sandwiching the chamber 10 between the upper wall and the bottom wall of the tank body 1.

(Effects of the Invention) Since the present invention is configured as described above, the vehicle fuel tank device does not use a bracket for fixing a chamber or the like and does not make a hole in the tank. It is possible to easily position the chamber in the tank without fear of fuel leakage,
Since the chamber is not provided in the tank bottom by integral molding, the rigidity does not decrease. The rigidity of the tank body is increased by the bead portion, and the rigidity of the entire tank can be improved by sandwiching the chamber between the upper and lower bead portions of the tank.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicular tank device according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a perspective view of a chamber. 1: tank body, 2: bottom wall (lower surface), 5: upper wall (upper surface), 7, 8, 9: bead part, 10: chamber.

Claims (1)

(57) [Scope of request for utility model registration] 1. A fuel tank device for a vehicle, wherein a chamber is inserted and fixed from an opening into a tank body integrally formed of plastic, wherein the chamber fits into the tank body when the chamber is inserted. A first bead that fits and is fixed in a direction perpendicular to the insertion direction, and a second bead that fits and is fixed in the insertion direction when the inserted chamber reaches a fixed position, A fuel tank device for a vehicle, wherein a chamber inserted through an opening is sandwiched and fixed between these beads.