JPH0446979Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a fuel tank structure in which, for example, an evaporative pipe connected to a fuel supply device of an engine is connected and fixed to the fuel tank.

[Conventional technology]

Conventionally, as a fuel tank structure for connecting and fixing an evaporative pipe connected to a fuel supply device of an engine to a fuel tank, for example, as shown in FIGS. 6 and 7, an evaporative pipe 5 (hereinafter simply referred to as a pipe) is a fuel An arcuate curved portion 5a is bent into an arc near the upper wall plate 2 of the fuel tank 1 so as not to interfere with each component disposed on the upper part of the fuel tank (not shown) near the tank 1. At the same time, the lower part of the arcuate curved part 5a is formed into a straight part 5b. In order to connect and fix the pipe 5 formed in this way to the fuel tank 1, the lower straight part 5b of the circularly curved part 5a of the pipe 5 is vertically inserted into the pipe insertion hole 40 bored in the retainer 30. However, the straight portion 5b of the pipe 5 and the retainer 30 are joined by, for example, brazing 6, and the pipe 5 is
The retainer 30 into which is inserted and joined is joined and fixed to the upper wall plate 2 of the fuel tank 1 by, for example, spot welding 7 or the like (see FIG. 7). That is, as for the part where the pipe 5 is inserted and joined to the substantially horizontal retainer 30 which is parallel to the upper wall plate 2 of the fuel tank 1, the part which is substantially orthogonal to the substantially horizontal retainer 30 is the most suitable for the joining work and the joining performance. Therefore, a straight portion 5b is often formed below the pipe 5, and this straight portion 5b is inserted and joined into the pipe insertion hole 40 of the retainer 30.

Examples of such prior art include ``Fuel Tank Pipe Mounting Structure'' published in Japanese Utility Model Application Publication No. 56-91118.

[The problem that the idea aims to solve]

However, in the fuel tank structure shown in FIGS. 6 and 7, the lower straight portion 5b of the arcuate bent portion 5a of the pipe 5 is inserted into the pipe insertion hole 40 of the retainer 30 and joined.
The position of the upper wall plate 2 of the fuel tank 1 to which the retainer 30 into which the pipe 5 is inserted is joined and fixed, that is, the position of the upper wall plate 2 of the fuel tank 1 is determined by joining the retainer 30 at the lower straight part 5b of the pipe 5 as described above. Therefore, the size of the fuel tank 1 is limited by the shape and dimensions of the pipe 5 above the retainer 30, including a part of the straight portion 5b.

Therefore, in order to increase the capacity of the fuel tank 1, for example, a substantially horizontal retainer 3 on the fuel tank 1 is installed.
0 and the pipe 5 are inserted and joined by removing the straight part 5b of the pipe 5 and inserting and joining the pipe 5 to the arc-shaped curved part 5 of the pipe 5.
It is also conceivable to insert and join at point a, but since the pipe insertion hole 40 drilled in the retainer 30 is elliptical, the connection between this elliptical pipe insertion hole 40 and the arcuate curved portion 5a of the pipe 5 is Due to size adjustment etc.
If the pipe 5 cannot be inserted or a gap is created, the work of inserting and joining the pipe 5 into the retainer 30 will be inferior to the case described above. Furthermore, in order to increase the capacity of the fuel tank 1, it is possible to reduce the radius of curvature of the arc-shaped curved portion 5a of the pipe 5 and to position the upper wall plate of the fuel tank 1 upward. In forming the curved portion 5a, there are problems such as the fact that the bent shape of the pipe cannot be made smaller than a certain radius of curvature due to molding constraints.

Therefore, the purpose of this invention is to position the upper wall plate of the fuel tank upwardly without interfering with the pipe installed on the upper wall plate side of the fuel tank with the attached member. The purpose is to increase capacity.

[Means to solve the problem]

Therefore, this invention provides a fuel tank structure in which an evaporative pipe insertion hole is formed in a retainer fixed to the upper wall plate of the fuel tank, and an evaporative pipe having an arcuate curved part is inserted and joined to the evaporative pipe insertion hole of this retainer. The retainer is formed with an inclined formed part that is substantially orthogonal to the bending tangential direction of the arc-shaped bent part of the evaporative pipe, and is formed to be inclined with respect to the upper wall plate surface of the fuel tank. The fuel tank structure is characterized in that the arcuate curved portion of the evaporative pipe is inserted and joined to the evaporative pipe insertion hole.

[Effect]

According to the above-mentioned means, since the inclined formed part formed on the retainer is inclined substantially perpendicular to the bending tangential direction of the arcuate curved part of the evaporative pipe (hereinafter simply referred to as pipe), the inclined formed part of this retainer The pipe insertion hole drilled in the pipe may also have the same shape as the external shape of the pipe, and the arcuate curved part of the pipe can be inserted and joined into the pipe insertion hole of the same shape as the pipe. Since the joining surface of the retainer and the retainer are formed at an angle perpendicular to the curved part of the pipe, the angle formed by the upper wall plate surface of the fuel tank and the straight part including the upper end of the pipe (acute angle side ), compared to simply inserting and joining a straight pipe to the retainer surface, the straight part including the top end of the pipe is tilted more toward the upper wall plate surface of the fuel tank due to the curvature of the pipe. The dimension from the upper wall plate side to the top end position of the pipe can be reduced in this state.

〔Example〕

Embodiments of this invention will be described below based on the accompanying drawings.

The drawings from FIG. 1 to FIG. 5 show an embodiment of this invention, and as shown in FIG. An evaporative pipe 5 (hereinafter simply referred to as a pipe) connected to a fuel supply device is coupled and fixed. The connection and fixation of the fuel tank 1 and the pipe 5 is as shown in FIGS. The retainer 3 is inserted into a pipe insertion hole 4 drilled in the retainer 3 and joined by, for example, brazing 6, and the retainer 3 into which the pipe 5 is inserted and joined is attached to the fuel tank 1 by, for example, spot welding 7. It is joined and fixed to the upper wall plate 2.

In the fuel tank structure constructed in this manner, as shown in FIGS. 1 and 2, the retainer 3 is provided with an inclined forming portion 3a that is substantially perpendicular to the bending tangential direction of the arc-shaped bent portion 5a of the pipe 5. was formed. The inclined formed portion 3a formed in this retainer 3 is formed to be inclined upward with respect to the upper wall plate surface 2a of the fuel tank 1, and the pipe 5 is inserted into the inclined formed portion 3a of this retainer 3. A pipe insertion hole 4 is formed to match the outer shape of the pipe 5 and to have the same shape (for example, a substantially right circle).

As a result, it is extremely easy to match the dimensions of the pipe insertion hole 4 and the pipe 5, and problems such as a large gap between the pipe 5 and the pipe insertion hole 4 can be prevented. 3
The insertion and joining work can be performed in the same way as the work of inserting and joining a straight pipe into the flat surface of the retainer.

Furthermore, an inclined molded portion 3a formed on the retainer 3
is inserted and joined to the arcuate curved portion 5a of the pipe 5 with an inclination substantially perpendicular to the bending tangential direction of the arcuate curved portion 5a of the pipe 5, so that the upper part of the fuel tank 1 with the retainer 3 attached is The angle (acute angle side) formed by the wall plate surface 2a and the straight part of the pipe near the upper end of the pipe 5 is smaller than that when a straight pipe is used instead of a pipe having an arcuate upper curved part 5a, for example. Since we can take the acute angle of
The closer the upper end position 5c of the pipe 5 is to the upper wall plate surface 2a of the fuel tank 1, the higher the upper wall plate surface 2a of the fuel tank 1 can be. The capacity of the fuel tank 1 can be increased by the capacity up to 2a.

Furthermore, since the pipe 5 can be joined to the retainer 3 at the arc-shaped bent portion 5a of the pipe 5, the pipe 5
This makes it possible to shorten the lower straight portion 5b, thereby reducing weight and cost.

In the embodiment shown in FIGS. 1 and 2, the upper side of the inclined molded portion 3a formed in the retainer 3 is not made to protrude excessively from the upper wall plate surface 2a of the fuel tank 1, and the required inclination is In order to obtain the upper wall plate surface 2 of the fuel tank 1,
A recessed portion 3b slightly recessed from a is formed. In addition, if there is no particular problem with the amount of protrusion above the inclined forming part 3a of the retainer 3, for example, as shown in FIGS. 3 and 4, the lower side of the inclined forming part 3a formed on the retainer 3 It is also conceivable that the inclined molded portion 3a be formed so as to be inclined upward from the joining seat 3c to the upper wall plate 2 of the fuel tank 1 without recessing.

[Effect of idea]

As mentioned above, this invention forms an inclined formed part on the retainer fixed to the upper wall plate of the fuel tank, which is substantially perpendicular to the bending tangent direction of the arc-shaped bent part of the evaporative pipe, and By drilling an evaporative pipe insertion hole and inserting and connecting the arcuate curved part of the evaporative pipe, the evaporative pipe installed on the upper wall plate side of the fuel tank can be routed to a narrower than conventional mounting member. Because it can be done in the space between the fuel tank and the evaporative pipe,
Since no wiring space is required, the capacity of the fuel tank can be increased.

[Brief explanation of the drawing]

The drawings from Fig. 1 to Fig. 5 show an embodiment of this invention, Fig. 1 is a sectional view taken along the line - - of Fig. 2, Fig. 2 is an enlarged perspective view of Fig. 5, and Fig. 3 4 shows another embodiment of the invention, FIG. 3 is a sectional view equivalent to FIG. 1, FIG. 4 is a perspective view equivalent to FIG. 2, FIG. 5 is an overall perspective view of the fuel tank, and FIG. The drawings in FIG. 7 show a conventional example, and FIG. 6 is a sectional view corresponding to FIG. 1, and FIG. 7 is a perspective view corresponding to FIG. 2. DESCRIPTION OF SYMBOLS 1...Fuel tank, 2...Upper wall plate, 2a...Upper wall plate surface, 3...Retainer, 3a...Inclination molded part,
4...Pipe insertion hole, 5...Pipe, 5a...Circular curved portion.

Claims (1)

[Scope of utility model registration request] In a fuel tank structure in which an evaporative pipe insertion hole is formed in a retainer fixed to an upper wall plate of the fuel tank, and an evaporative pipe having an arcuate curved part is inserted and joined to the evaporative pipe insertion hole of this retainer, the retainer has the An inclined formed part substantially perpendicular to the bending tangential direction of the arc-shaped bent part of the evaporative pipe is formed to be inclined with respect to the upper wall plate surface of the fuel tank, and the evaporative pipe insertion hole of the inclined formed part of the retainer is formed to be inclined with respect to the upper wall plate surface of the fuel tank. A fuel tank structure characterized by inserting and joining an arc-shaped bent part of an evaporative pipe.