JP3155082B2 - How to install a fuel tank in a car - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a fuel tank of an automobile, and more particularly, to a fuel tank via a tank strap below a rear floor panel which is kicked up from a floor panel surface in front of a vehicle body and extends rearward of the vehicle body. And an exhaust pipe extending in the vehicle width direction is provided between the fuel tank and a vertical wall surface forming the kick-up portion.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Utility Model Laid-Open Publication No. 61-87728, the vehicle extends in the front-rear direction of a vehicle below a rear floor panel extending upward from the floor panel surface in front of the vehicle body and extending rearward. 2. Description of the Related Art A fuel tank is known in which both ends are fixed to a vehicle body via tank straps. In the case where the fuel tank is disposed below the rear floor panel, how to arrange the exhaust pipe extending from the front to the rear of the vehicle is a problem.

[0003] Conventionally, there has been known an exhaust pipe penetrating recess formed in the lower surface of a fuel tank and extending in the front-rear direction of a vehicle body so that the exhaust pipe passes through the recess.
Since the exhaust pipe passes directly below the fuel tank, the fuel tank must be protected from the heat of the exhaust pipe.If a recess is formed in the lower surface of the fuel tank, the lower part of the fuel tank sandwiches the recess. There are many inconveniences, such as the need to transfer the fuel remaining in one lower part to the other lower part, because two places can be created. Therefore, the exhaust pipe extending from the front to the rear in the vehicle width direction central portion is bent so as to temporarily extend in the vehicle width direction between the front end portion of the fuel tank and the vertical wall surface forming the kick-up portion, and then bypasses the fuel tank. There is also known one that is arranged to extend rearward again.

[0004]

Conventionally, the mounting of the fuel tank and the mounting of the exhaust pipe have been performed separately. However, from the viewpoint of reducing the number of mounting operations and improving the working efficiency, the fuel tank is mounted. There has been a demand that the mounting of the exhaust pipe and the mounting of the exhaust pipe be performed at the same time. As described above, in the case where the exhaust pipe is disposed in the vehicle width direction between the front end of the fuel tank and the vertical wall surface of the kick-up portion, the mounting position of the front end of the tank strap to the vehicle body and the arrangement position of the exhaust pipe If they overlap vertically, the exhaust pipe will be located in the work space for attaching the front end of the tank strap to the vehicle body, so it is necessary to install the fuel tank and exhaust pipe at once. Is inconvenient. Therefore, in order to install the fuel tank and the exhaust pipe at the same time, shift the position of the exhaust pipe and the mounting position of the front end of the tank strap to the vehicle body so that they do not overlap in the vertical direction. Therefore, it is necessary to secure a work space for attaching the front end of the tank strap.

On the other hand, since the kick-up portion is located at the foot of the occupant seated in the vehicle interior, an exhaust pipe extends in the vehicle width direction between the vertical wall surface of the kick-up portion and the front end of the fuel tank as described above. In this case, it is necessary to heat the vertical wall surface by the heat of the exhaust pipe so that the occupant does not feel the heat. As a method for that, a method of providing a separation space for preventing heat damage between the exhaust pipe and the vertical wall surface of the kick-up portion can be considered.

However, a space for preventing heat damage is provided between the exhaust pipe and the vertical wall surface of the kick-up portion, and a tank strap for separately mounting the fuel tank and the exhaust pipe at one time. Ensuring a work space for mounting the front end imposes many restrictions in the limited space, which in turn requires a reduction in the capacity of the fuel tank. In addition, as a method of preventing heat damage of the exhaust pipe, a method of providing an insulator for preventing heat damage on the surface of the exhaust pipe facing the kick-up portion vertical wall surface is also conceivable.How to provide such an insulator is described above. This is disadvantageous in cost in comparison with the method of providing such a separation space.

The problem to be solved by the present invention is to mount a fuel tank via a tank strap while effectively utilizing a narrow space below a rear floor panel which is kicked up from a front floor panel surface and extends rearward. In addition, the exhaust pipe extending in the vehicle width direction can be attached between the vertical wall surface of the kick-up portion and the front end of the fuel tank at a time, and the heat damage due to the exhaust pipe can be prevented at no cost. An object of the present invention is to provide a method for mounting a fuel tank of an automobile.

[0008]

According to the present invention, there is provided a method for mounting a fuel tank on a vehicle according to the present invention, wherein the front end of the tank strap is mounted on a vehicle body in the method for mounting a fuel tank on a vehicle having the above-described structure. Was
Mounting means for attaching the front end to the vehicle body.
Jig for the front end to hold it as
Rear end for holding the rear end of the
Hold the part jig and the fuel tank so that they can be attached to the vehicle body.
Tank jig and exhaust pipe can be attached to the vehicle body
And an exhaust pipe jig for holding the exhaust pipe at a position where a predetermined space for preventing heat damage is formed between the exhaust pipe and the vertical wall surface of the kick-up portion. And the mounting position of the front end of the tank strap to the vehicle body is set to a position above the above-mentioned separation space, and the front end and the rear end of the tank strap are respectively set.
To be held by the front end jig and the rear end jig.
At the same time, the fuel tank is held by the tank jig.
On the other hand, the exhaust pipe is connected to the front end jig and the fuel tank.
To the exhaust pipe jig so that it is located between the
The jig for the front end is inserted from below into the space, and the front end is attached to the position for attachment to the vehicle body via attachment means of the jig.

[0009]

In the method for mounting a fuel tank of an automobile according to the present invention, a front end of a tank strap is provided.
Jig, the jig for the rear end of the tank strap, and the fuel
Using the jig for the tank and the jig for the exhaust pipe, the disposition position of the exhaust pipe is set so that a predetermined space for preventing heat damage is formed between the exhaust pipe and the vertical wall surface. By setting the mounting position of the front end of the tank strap to the vehicle body at a position above the separation space, the work space for mounting the front end of the tank strap and the separation space for preventing heat damage can be used. The front end of the tank strap is attached to the vehicle body by passing the front end jig through the space from below. Therefore, the narrow space below the rear floor panel can be effectively used, and the mounting of the fuel tank and the mounting of the exhaust pipe can be performed at one time. Also,
Since there is no need to provide an insulator for preventing heat damage, the cost can be reduced.

As described above, according to the method of mounting a fuel tank on an automobile according to the present invention, a narrow space below the rear floor panel is reduced by using both a space for preventing heat damage caused by an exhaust pipe and a work space for mounting the fuel tank. It is possible to simultaneously mount the fuel tank and the exhaust pipe while effectively using the fuel tank, and reduce costs for preventing heat damage caused by the exhaust pipe.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for mounting a fuel tank of an automobile according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a plan view showing a schematic structure of a fuel tank mounting structure for an automobile according to an embodiment of the present invention, and FIG.
FIG. 2 is a sectional view taken along line II-II in FIG. 1. In FIG. 1, illustration of the rear floor panel is omitted.

As shown in FIG. 2, the rear floor panel 2
A kick member extending from the floor panel surface 4 at the front of the vehicle body to the rear of the vehicle body extends rearward. As shown in FIG. It is joined to the upper surface of the rear floor panel 2 so as to form a closed section together with the rear floor panel 2.
As shown in FIG. 1, rear side frames 10 extending in the vehicle longitudinal direction are disposed at both ends in the vehicle width direction behind the cross member 8, and are located at a predetermined distance behind the cross member 8 behind the vehicle body. A second cross member 12 for connecting the rear side frames 10 extends in the vehicle width direction.

The fuel tank 14 is surrounded by the cross member 8, the second cross member 12, and the rear side frames 10 on both sides below the rear floor panel 2 via two tank straps 16 extending in the vehicle width direction. Installed in the position Further, as shown in FIG. 1, an exhaust pipe 18 extending rearward through the vehicle width direction central portion at the front of the vehicle body includes a vertical wall surface 20 forming the kick-up portion 6 and a fuel tank 14.
Is temporarily bent so as to extend in the vehicle width direction with respect to the front end of the vehicle, and is arranged to extend rearward again, bypassing the fuel tank 14.

Next, the features of the present invention will be described.
As shown in FIG. 2, an exhaust pipe 18 extending in the vehicle width direction between the vertical wall surface 20 of the kick-up portion 6 and the front end of the fuel tank 14 prevents heat damage between the vertical wall surface 20 and the vertical wall surface 20. End portion 16a of the tank strap 16 (the right one of the two tank straps) is disposed such that a predetermined separation space L is formed.
Is attached to the vehicle body at a position above the separation space L. More specifically, the front end of the tank strap
16a is formed by screwing a nut 22 fixed in a closed cross section formed by the cross member 8 and the rear floor panel 2 and a bolt 24 for inserting the front end 16a upward, so that the lower surface of the cross member 8 is It is fixed to. The insulator 26 attached to the lower surface of the exhaust pipe 18 shown in FIG. 2 is provided to prevent hay and the like below the vehicle body from being heated by the heat of the exhaust pipe 18.

According to the fuel tank mounting structure for an automobile according to this embodiment, a predetermined space L for preventing heat damage is formed between the exhaust pipe 18 and the vertical wall surface 20, and the front end 16a of the tank strap is separated from this space. Since the mounting space is provided above the space L so that the space L for preventing heat damage can also be used as a work space for the mounting jig 28 for mounting the front end 16a of the tank strap, the rear floor panel can be used. 2 It is possible to effectively use a narrow space below, and it is possible to mount the fuel tank 14 and the exhaust pipe 18 at one time. Further, since there is no need to provide an insulator for preventing heat damage, the cost can be reduced.

Next, an embodiment of a method for mounting a fuel tank of an automobile according to the present invention will be described. FIG. 3 is a view schematically showing a method of mounting a fuel tank of an automobile according to one embodiment of the present invention, and FIG. 4 is a detailed sectional view of a portion A in FIG. In FIGS. 3 and 4, the same elements as those shown in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2, and the detailed description thereof is omitted.

In the method for mounting a fuel tank on a vehicle according to the present embodiment, first, as in the above-described structure for mounting a fuel tank on a vehicle according to one embodiment of the present invention, heat damage occurs between the exhaust pipe 18 and the vertical wall surface 20. The position of the exhaust pipe 18 is set so that a predetermined space for prevention is formed, and the tank strap front end 16a is located above the space.
Set the mounting position on the vehicle body. Then, on the tank strap 16 bridged between a jig 32 for holding the front end and a jig 34 for holding the rear end mounted on the mounting pallet 30 located below the rear floor panel 2. Then, the fuel tank 14 is set via a jig 36 for holding the tank. At the same time, the exhaust pipe 18 is set between the jig 32 for holding the front end and the front end of the fuel tank 14 via a jig (not shown).

As shown in FIG. 4, the jig 32 for holding the front end is formed in a cylindrical shape extending vertically, and has a bolt runner 38 set therein (for holding the rear end). The same applies to the jig 34). At the tip of the bolt runner 38, an upward bolt 24 for inserting the tank strap front end 16a is set.

After setting the fuel tank 14 and the exhaust pipe 18,
The rear floor panel 2 and the mounting pallet 30 are brought close to each other (at this time, the jig 32 for holding the front end portion passes through the space for preventing heat damage from below), and the bolt runner 38 is driven by driving means (not shown). Then, the fuel tank 14 is mounted on the vehicle body by screwing the bolt 24 with the nut 22 welded to the rear floor panel 2, and at the same time, the exhaust pipe 18 is mounted on the vehicle body by mounting means (not shown).

As described above, according to the method of mounting the fuel tank of the vehicle according to the present embodiment, the narrow space below the rear floor panel 2 can be effectively used, and the fuel tank 14 can be mounted on the vehicle body and the exhaust pipe 18 can be mounted on the vehicle body. Can be mounted at one time, so that the work efficiency of assembling the vehicle body can be improved.

[0022] Having described the embodiments of the fuel tank mounting method of the vehicle according to the present invention, a fuel tank mounting method of the vehicle according to the present invention is not limited to such embodiments, possible to change the seed s Is possible.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of a vehicle fuel tank mounting structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a diagram schematically illustrating a method of mounting a fuel tank of an automobile according to an embodiment of the present invention.

FIG. 4 is a detailed sectional view of a portion A in FIG. 3;

[Explanation of symbols]

2 Rear floor panel 4 Floor panel surface 6 Kick-up part 14 Fuel tank 16 Tank strap 16a Tank strap front end 18 Exhaust pipe 20 Vertical wall surface 32 Front end holding jig (front end jig) 34 Rear end holding jig Jig (Jig for rear end) 36 Jig for holding tank (Jig for tank) 38 Bolt runner (Mounting means) L Separation space

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Seiichi Ichimura 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Inside Mazda Motor Corporation (72) Tetsuya Murakami 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Matsu (56) References JP-A 64-44829 (JP, U) JP-A-3-123632 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B60K 15 / 063

Claims (1)

(57) [Claims] 1. A fuel tank is attached to a vehicle body below a rear floor panel which is kicked up from a floor panel surface in front of the vehicle body and extends rearward through a tank strap extending in the vehicle front-rear direction and having both ends attached to the vehicle body. In a method for mounting a fuel tank of an automobile, wherein an exhaust pipe extending in a vehicle width direction is disposed between a front end portion of the fuel tank and a vertical wall surface forming the kick-up portion, mounting the front end portion of the tank strap to a vehicle body.
Means for holding said front end portion attachable to the vehicle body
Jig for the front end and the rear end of the tank strap
Rear end jig for holding the vehicle mountable to the vehicle body
And the fuel tank is held so that it can be attached to the vehicle body.
Tank jig and the exhaust pipe can be attached to the vehicle body
An exhaust pipe jig for holding the exhaust pipe and the exhaust pipe at a position where a predetermined space is formed between the exhaust pipe and the vertical wall surface. The mounting position of the front end to the vehicle body is set at a position above the separation space, and the front end of the tank strap is
The front end jig and the rear end
And holding the fuel tank in the tank.
While holding the exhaust pipe at the front end.
Between the jig and the front end of the fuel tank.
Wherein is held by the exhaust pipe jig, the jig for the front end is inserted from below into the separation space, taken of the front end jig in
A method of attaching a fuel tank to an automobile, comprising attaching the front end to an attachment position to the vehicle body via attaching means.