JPH06107002A - Vehicle fuel tank mounting structure and mounting method - Google Patents

Abstract

(57) [Abstract] [Purpose] While effectively utilizing the narrow space below the rear floor panel, the fuel tank is attached via the tank strap and the vehicle width is set between the vertical wall of the kick-up section and the front end of the fuel tank. (EN) Provided are a fuel tank mounting structure and a mounting method for an automobile capable of simultaneously mounting an exhaust pipe extending in a direction and preventing heat damage due to the exhaust pipe at low cost. [Arrangement] The exhaust pipe 18 is arranged so that a predetermined space L for heat damage prevention is formed between the exhaust pipe 18 and the vertical wall surface 20 of the kick-up portion, and the tank strap front end portion 16a has the space described above. It is configured to be attached to the vehicle body at a position above L.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, as disclosed, for example, in Japanese Utility Model Laid-Open No. 61-87728, a vehicle body extends in the front-rear direction below a rear floor panel that extends backward from the vehicle body by kicking up from the front floor panel surface. It is known that a fuel tank is attached via tank straps whose both ends are fixed to the vehicle body. In the case where the fuel tank is arranged below the rear floor panel as described above, how to arrange the exhaust pipe extending from the front of the vehicle to the rear of the vehicle becomes a problem.

Conventionally, there is also known a fuel tank in which a recess for inserting an exhaust pipe extending in the longitudinal direction of the vehicle body is formed on the lower surface of the fuel tank so that the exhaust pipe passes through the recess.
Since the exhaust pipe passes directly under the fuel tank, it is necessary to protect the fuel tank from the heat of the exhaust pipe.If a recess is formed on the lower surface of the fuel tank, the lower part of the fuel tank will be caught in the recess. Since there will be two places, there are many inconveniences such as having to move the fuel remaining in one lower part to the other lower part. Therefore, bend the exhaust pipe that extends from the front to the rear in the central portion in the vehicle width direction so as to extend in the vehicle width direction between the front end portion of the fuel tank and the vertical wall surface that forms the kick-up portion, and then bypass the fuel tank. It is also known to arrange so as to extend rearward again.

[0004]

Conventionally, the fuel tank and the exhaust pipe have been mounted separately, but from the viewpoint of reducing the number of mounting work and improving work efficiency, the fuel tank is installed. There is a demand to be able to attach the exhaust pipe and the exhaust pipe at the same time. As described above, in the exhaust pipe arranged in the vehicle width direction between the front end of the fuel tank and the vertical wall of the kick-up portion, the mounting position of the front end of the tank strap to the vehicle body and the installation position of the exhaust pipe If the and are overlapped in the vertical direction, 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 the exhaust pipe at the same time. Is not convenient. Therefore, in order to attach the fuel tank and the exhaust pipe at the same time, shift the exhaust pipe and the front end of the tank strap so that they do not overlap in the vertical direction. Therefore, it becomes necessary to secure a working space for attaching the front end of the tank strap.

On the other hand, since the kick-up portion is located at the feet of the occupant seated in the passenger compartment, the exhaust pipe is provided between the vertical wall surface of the kick-up portion and the front end portion of the fuel tank in the vehicle width direction as described above. In this case, it is necessary to prevent the occupant from feeling the heat by heating the vertical wall surface by the heat of the exhaust pipe. As a method for that purpose, 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, apart from that, a tank strap for mounting the fuel tank and the exhaust pipe at the same time. Securing a work space for mounting the front end portion imposes many restrictions in a limited space, and thus reduces the capacity of the fuel tank. As a method of preventing heat damage to the exhaust pipe, a method of providing an insulator for heat damage prevention on the surface of the exhaust pipe facing the vertical wall surface of the kick-up portion is also conceivable, but the method of providing such an insulator is described above. It is disadvantageous in cost as compared with the method of providing such a separated space.

The problem to be solved by the present invention is to mount a fuel tank through a tank strap while effectively utilizing a narrow space below a rear floor panel that extends rearward by kicking up from a front floor panel surface. And the exhaust pipe extending in the vehicle width direction between the vertical wall surface of the kick-up part and the front end of the fuel tank can be attached at the same time, and heat damage due to the exhaust pipe can be prevented at low cost. A fuel tank mounting structure and mounting method for an automobile are provided.

[0008]

As a means for solving the above problems, in a fuel tank mounting structure for an automobile according to the present invention, in the fuel tank mounting structure for an automobile having the above-mentioned structure, an exhaust pipe is provided with the exhaust pipe and a kick. It is arranged such that a predetermined space for preventing heat damage is formed between the vertical wall of the up part and the front end of the tank strap is attached to the vehicle body at a position above the space.

Further, as a means for solving the above-mentioned problems, in the fuel tank mounting method for an automobile according to the present invention, in the fuel tank mounting method for an automobile having the above-mentioned structure, the exhaust pipe is arranged at the same position as the exhaust pipe and the kick. While setting to a position where a predetermined separation space for heat damage prevention is formed between the up wall and the vertical wall surface, the mounting position of the tank strap front end portion to the vehicle body is set to a position above the separation space,
A jig for attaching the front end of the tank strap to the vehicle body is inserted from below into the space, and the front end is attached to the vehicle body through the jig.

The jig is a holding jig for holding the front end of the tank strap in order to align the front end of the tank strap, and a jig for mounting the front end of the tank strap to the vehicle body. (Tool) etc.

[0011]

In the fuel tank mounting structure for an automobile according to the present invention described above, a predetermined space for preventing heat damage is formed between the exhaust pipe and the vertical wall surface, and the front end of the tank strap is provided with this space. Since it is attached to the vehicle body at a position above the rear floor, it is possible to use both the working space for attaching the front end of the tank strap and the separate space for preventing heat damage separately, so that they can be used as both. The narrow space under the panel can be used effectively, and the mounting position of the front end of the tank strap to the vehicle body and the position of the exhaust pipe can be shifted so that they do not overlap in the vertical direction. The exhaust pipe can be attached at the same time. Further, since it is not necessary to provide an insulator to prevent heat damage, the cost can be reduced.

Further, in the fuel tank mounting method for an automobile according to the present invention, the position of the exhaust pipe is set so that a predetermined space for heat damage prevention is formed between the exhaust pipe and the vertical wall surface. In addition, by setting the mounting position of the tank strap front end portion to the vehicle body to a position above the spacing space, the working space for mounting the tank strap front end portion and the spacing space for heat damage prevention can be combined,
A jig for attachment is passed from below into this combined space, and the front end of the tank strap is attached to the vehicle body.
Therefore, the narrow space below the rear floor panel can be effectively utilized, and the fuel tank and the exhaust pipe can be attached at the same time. Further, since it is not necessary to provide an insulator to prevent heat damage, the cost can be reduced.

As described above, according to the fuel tank mounting structure and mounting method for an automobile according to the present invention, the space for preventing heat damage by the exhaust pipe and the working space for mounting the fuel tank are combined so that the space below the rear floor panel is reduced. While effectively using the narrow space, it is possible to simultaneously attach the fuel tank and the exhaust pipe, and reduce the cost for preventing heat damage by the exhaust pipe.

[0014]

Embodiments of a fuel tank mounting structure and mounting method for 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 vehicle fuel tank mounting structure according to an embodiment of the present invention, and FIG.
FIG. 2 is a sectional view taken along line II-II in FIG. The rear floor panel is not shown in FIG.

As shown in FIG. 2, the rear floor panel 2 is
A kick member is kicked up from a floor panel surface 4 in front of the vehicle body and extends rearward of the vehicle body. As shown in FIG. 1, a cross member 8 having an L-shaped cross section extending in the vehicle width direction is provided above the kick up portion 6. It is joined to the upper surface of the rear floor panel 2 so as to form a closed cross section together with the rear floor panel 2.
Further, as shown in FIG. 1, rear side frames 10 extending in the vehicle front-rear direction are provided at both ends in the vehicle width direction behind the cross member 8, and the cross member 8 is located at a predetermined distance behind the vehicle body. A second cross member 12 connecting the two rear side frames 10 is extended in the vehicle width direction.

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

Next, the features of the present invention will be described.
As shown in FIG. 2, the 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 portion of the fuel tank 16 prevents heat damage from the vertical wall surface 20. A front end portion 16a of the tank strap 16 (of the two on the right side of the vehicle body) which is arranged so as to form a predetermined space L for
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 a lower surface side of the cross member 8 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 that inserts the front end portion 16a upward. It is fixed to. The insulator 26 attached to the lower surface side 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 the present embodiment, a predetermined space L for preventing heat damage is formed between the exhaust pipe 18 and the vertical wall surface 20, and the tank strap front end portion 16a is separated by this space. Since the space L is attached to the vehicle body above the space L, the space L for preventing heat damage can also be used as a working space for the jig 28 for mounting the front end 16a of the tank strap. (2) The narrow space below can be effectively used, and the fuel tank 14 and the exhaust pipe 18 can be attached at the same time. Further, since it is not necessary to provide an insulator for preventing heat damage, the cost can be reduced.

Next, an embodiment of a method for mounting a fuel tank on a vehicle according to the present invention will be described. FIG. 3 is a diagram showing an outline of a method for mounting a fuel tank of an automobile according to an embodiment of the present invention, and FIG. In FIGS. 3 and 4, elements similar to those shown in FIGS. 1 and 2 are designated by the same reference numerals as those shown in FIGS. 1 and 2, and detailed description thereof is omitted.

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

As shown in FIG. 4, the jig 32 for holding the front end portion is formed in a cylindrical shape extending in the vertical direction, and a bolt runner 38 is set inside (for holding the rear end portion). The same applies to jig 34). An upward bolt 24 that inserts the tank strap front end portion 16a is set at the tip of the bolt runner 38.

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 passes through the space for preventing heat damage from below), and the bolt runner 38 is driven by a driving means (not shown). Then, the bolt 24 is screwed into the nut 22 welded to the rear floor panel 2, whereby the fuel tank 18 is attached to the vehicle body, and at the same time, the exhaust pipe 18 is attached to the vehicle body by an attaching means (not shown).

As described above, according to the fuel tank mounting method for an automobile of this embodiment, the narrow space below the rear floor panel 2 can be effectively utilized, and the fuel tank 14 can be mounted on the vehicle body and the exhaust pipe 18 can be mounted on the vehicle body. Since it is possible to attach the parts at once, it is possible to improve the work efficiency of assembling the vehicle body.

Although the embodiment of the vehicle fuel tank mounting structure and mounting method according to the present invention has been described above, the vehicle fuel tank mounting structure and mounting method according to the present invention are not limited to such embodiments. In the embodiment of the attaching method, the bolt runner 38 as the attaching jig is incorporated in the jig 32 for holding the front end portion, but the holding jig and the attaching jig are separately provided. Various changes such as configuration may be made.

[Brief description of 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 line II-II in FIG.

FIG. 3 is a diagram showing an outline of a method for mounting a fuel tank of an automobile according to an embodiment of the present invention.

4 is a detailed cross-sectional view of part A in FIG.

[Explanation of symbols]

 2 Rear floor panel 6 Kick-up part 14 Fuel tank 16 Tank strap 16a Tank strap front end 18 Exhaust pipe 20 Vertical wall 28, 32 Jig L Spacing space

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Seiichi Ichimura, No. 3 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (72) No. 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Stock In the company

Claims (2)

[Claims] 1. A tank strap, which extends in the front-rear direction of the vehicle body below a rear floor panel that kicks up from a floor panel surface in front of the vehicle body and extends rearward of the vehicle body, and both ends of which are attached to the vehicle body, and is attached to the vehicle body via the tank strap. A fuel tank mounting structure for an automobile, comprising: a mounted fuel tank; and an exhaust pipe extending in a vehicle width direction between a front end portion of the fuel tank and a vertical wall surface forming the kick-up portion, An exhaust pipe is arranged such that a predetermined space is formed between the exhaust pipe and the vertical wall surface, and a front end portion of the tank strap is attached to the vehicle body at a position above the space. A fuel tank mounting structure for automobiles. 2. A fuel tank is attached to a vehicle body via tank straps which extend in the vehicle body front-rear direction and whose both end portions are attached to the vehicle body below a rear floor panel which kicks up from a floor panel surface in front of the vehicle body and extends rearward. A fuel tank mounting method for an automobile, wherein an exhaust pipe extending in a vehicle width direction is arranged between a front end portion of the fuel tank and a vertical wall surface forming the kick-up portion. The tank strap is set at a position where a predetermined space is formed between the pipe and the vertical wall surface, and the mounting position of the front end portion of the tank strap to the vehicle body is set at a position above the space. A jig for mounting the front end portion to the vehicle body is inserted into the space from below, and the front end portion is attached to the vehicle body through the jig. Fuel tank mounting method of a motor vehicle, characterized in that mounting.