JPH0323860Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fuel tank unit mounting device for mounting a tank unit such as a fuel pump or a level meter to a fuel tank for automobiles or other fuel tanks. (Prior Art) Conventionally, as shown in FIG. 1, for example, it is known that a mounting flange c of a tank unit is bolted around a mounting hole b at the top of a fuel tank a into which the tank unit is inserted. In this case, an annular nut plate d is welded to the upper surface of the tank a around the mounting hole b, and a bolt e inserted through the flange c is screwed into the annular nut plate d, or as shown in FIG. As shown, a recess f into which the head of the bolt e is fitted is formed on the upper surface of the fuel tank a, an annular set plate g on which the bolt e is set is welded to the upper surface of the tank a, and the bolt e is attached to the mounting flange c. The flange c is bolted onto the set plate g by screwing the bolt h through the set plate g (see Japanese Utility Model Publication No. 47-19374).

(Problems to be Solved by the Invention) In the above-mentioned technique shown in the first drawing, it is necessary to use a nut plate d having a sufficient thickness to carve a screw for screwing the bolt e; In order to weld the nut plate d to the fuel tank a, a well-trained welding technique is required, and there is also the disadvantage that distortion is likely to occur during welding. On the other hand, with the technique shown in Figure 2, the set plate g is thin and can be easily welded to the fuel tank a by spot welding, etc., and the above-mentioned welding problem does not occur. Since the recess f into which the head of the fuel tank e is fitted is formed, rainwater or the like enters the recess f through the gap between the fuel tank a and the set plate g and remains there, resulting in the inconvenience that rust is likely to occur.

An object of the present invention is to provide a device capable of solving both the above-mentioned welding problems and the problem of rust caused by residual rainwater.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a system in which the mounting flange of the tank unit is bolted around the mounting hole at the top of the fuel tank into which the tank unit is inserted. An annular set plate having a curved concave and convex direction is welded to the upper surface of the tank around the mounting hole at its concave portion, and the mounting flange is overlapped with the convex portion of the plate and bolted thereto. do.

(Example) The present invention will be explained with reference to an example shown in FIG. 3 and below.

In the drawing, 1 shows a tank unit consisting of a fuel tank and 2 a fuel pump.The tank unit 2 is inserted into the tank 1 through the mounting hole 3 at the top of the tank 1, and the tank unit 2 is inserted into the tank 1 through the mounting hole 3 at the top of the tank 1. Assemble the mounting flange 4 with a larger diameter than the mounting hole 3,
The flange 4 is bolted to an annular set plate 5 provided around the mounting hole 3.

The set plate 5 is formed by curved concavities and convexities in the vertical direction over its entire circumference, and is welded to the upper surface of the tank 1 around the mounting hole 3 at each concave portion 5a by spot welding or the like. The flanges 4 are overlapped with each convex portion 5b of the plate 5, and the overlapping portions are tightened and fixed with bolts 6 and nuts 7.

In addition, when tightening, a gasket 8 is interposed between the flange 4 and the mouth edge 3a of the mounting hole 3,
This is compressed by the tightening force of the flange 4 to seal the mounting hole 3, but in the one shown, the gasket 8
The flange 4 is not extended onto the plate 5, so that the flange 4 is directly polymerized and fixed onto the plate 5. According to this, it is possible to easily manage the tightening torque when tightening the bolts, and it is also advantageous that loosening of the bolts 6 due to aging of the seals 8 can be prevented.

In addition, in the illustrated example, each bolt 6 is connected to each convex portion 5.
b and the top surface of the tank 1.
are set in advance in each convex portion 5b so that the bolts are accommodated, and when the flange 4 is superimposed on each convex portion 5b, each bolt 6 is made to protrude upward through the flange 4, and a Although each nut 7 is screwed together and the flange 4 is bolted onto each convex portion 5b, the present invention is not limited to this.
For example, a screw hole may be formed in each convex portion 5b by burring, and a bolt may be screwed into the hole through the mounting flange 4 from above.

(Function) Attach the mounting flange 4 to each convex portion 5 of the set plate 5.
When bolted to b, the flange 4
A gap is formed between the bottom surface of the plate 5 and each concave portion 5a of the plate 5, and between each convex portion 5b and the top surface of the fuel tank 1, and these gaps are opened outward at a horizontal level. Therefore, there is no possibility that rainwater or the like will accumulate in the voids and cause rust.

(Effect of the invention) As described above, according to the present invention, the set plate is formed with vertical irregularities, which are welded to the upper surface of the fuel tank at the recessed parts, and the mounting flange of the tank unit is attached to the raised parts of the plate. It is designed to be bolted to the fuel tank, making welding easier compared to the conventional welding of a thick nut plate to the fuel tank, and there is no need to form a recess in the fuel tank, making it difficult for water to accumulate. It has the effect of preventing rust from forming over time.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional side view of a conventional example, Fig. 2 is a cross-sectional side view of another conventional example, Fig. 3 is a cross-sectional side view of an example of the present device, and Fig. 4 is a cross-section taken along the - line in Fig. 3. It is a diagram. 1...fuel tank, 2...tank unit, 3
...Mounting hole, 4...Mounting flange, 5...Set plate, 5a...Recess, 5b...Protrusion, 6...
bolt.

Claims (1)

[Scope of utility model registration request] In a system in which the mounting flange of the tank unit is bolted around the mounting hole at the top of the fuel tank into which the tank unit is inserted, an annular set plate with curved concavities and convexities in the vertical direction is attached to the recessed part of the set plate to fit around the mounting hole. A mounting device for a fuel tank unit, characterized in that the fuel tank unit is welded to the upper surface of the tank, and the mounting flange is overlapped with a convex portion of the plate and bolted thereto.