JPH10264864A - Floor structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the compatibility of the habitability of a car interior with the expansion of a fuel tank capacity. SOLUTION: While the loading space S of a fuel tank is secured between a side seat loading surface 5c and a rear differential device 7 provided to its lower side, by forming the side seat loading surface 5b of a rear floor panel 5 directing upward higher one step than the second seat loading surface 5a, an extension 6B whose upper surface 6a is provided along from the second seat loading surface 5a of the rear floor panel 5 to the third seat loading surface 5b is formed at the rear part of themain tank 6A of a fuel tank 6. Since the extension 6B is provided in the loading space S of the fuel tank, the capacity of the fuel tank 6 can be expanded without giving an influence to the habitable space around the foot of the second seat 3, and the improvement of the habitability and the expansion of the fuel tank capacity can be made compatible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile floor structure.

[0002]

2. Description of the Related Art FIG. 6 shows a layout structure of a conventional fuel tank. Reference numeral 1 denotes a front seat provided on a front floor panel 2. FIG.

[0003] Reference numerals 3 and 4 denote the rear of the front seat 1 and a second seat mounting surface 5 formed on a rear floor panel 5.
a and the third seat arranged on the third seat mounting surface 5b.

The front seat 1, the second seat 3 and the third seat 4 are all attached via unillustrated seat legs fixed to the floor surface.

[0005] The rear floor panel 5 has a front end connected to a rear end of the front floor panel 2, and the second seat mounting surface 5 a is one step up toward the passenger compartment above the front floor panel 2. The fuel tank 6 is formed so as to be high, and the fuel tank 6 is mounted on the lower side.

A rear differential device 7 is provided below the third seat mounting surface 5b.

Since the rear differential device 7 needs to be disposed with sufficient non-interference clearance so as not to interfere with peripheral components due to swings or the like during traveling, the third seat mounting surface 5b is provided with a second It is formed so as to be offset slightly higher than the seat mounting surface 5a toward the cabin.

In this conventional structure, when the capacity of the fuel tank 6 is to be increased due to the requirement of a cruising distance or the like, the rear differential device 7 is disposed behind the fuel tank 6 so that the fuel The tank 6 cannot be extended rearward, so that as shown in FIG.
The second seat mounting surface 5a is extended forward, and an extension 6B is provided in front of the main tank 6A of the fuel tank 6 to increase the capacity of the fuel tank 6.

[0009]

According to this conventional structure, the second seat mounting surface 5a of the rear floor panel 5 extends forward as shown in FIG. Since the extension portion 6B is provided to increase the capacity of the fuel tank 6, the second seat 3 is provided.
The second seat mounting surface 5a protrudes into the foot space of the occupant and is present as a step, so that the step narrows the living space around the foot of the occupant of the second seat 3 and sacrifices livability. Is generated.

Therefore, it is necessary to take measures such as moving the arrangement positions of the front seat 1 and the second seat 3 forward to secure a living space around the feet of the occupant of the second seat 3 and to enhance the livability. was there.

However, in this case, since the front seat 1 is also moved forward, the wheel base L becomes large due to the positional relationship between the front seat 1 and the vehicle body front part, and the minimum turning radius becomes large.

For this reason, as shown in FIG. 7, the height of the front floor panel 2 is set substantially equal to the height of the second seat mounting surface 5a of the rear floor panel 5 so that the step of the second seat 3 at the foot of the occupant is eliminated. It is known to secure a living space around the feet,
In this case, a dedicated floor panel is required, which is disadvantageous in terms of cost. Of course, since the floor surface is set high, the height of the seating surface of the second seat 3 also increases. Therefore, the vehicle height itself is increased in order to secure the head clearance of the occupant.

Therefore, the present invention solves these problems,
It is an object of the present invention to provide a floor structure of an automobile which can improve both comfort and a capacity of a fuel tank.

[0014]

According to the present invention, a fuel tank is mounted below a second seat mounting surface of a floor panel on which a second seat and a third seat are disposed behind a front seat, and a third seat is provided. A structure in which a rear differential device is disposed below the mounting surface, the third seat mounting surface is offset above the second seat mounting surface and step-formed, and the third seat mounting surface and the While securing a mounting space for the fuel tank between the lower rear differential device and the rear side of the fuel tank, the upper surface is formed with an extended portion along the third seat mounting surface from the second seat mounting surface of the floor panel,
The extended portion is disposed in a mounting space of the fuel tank, and the extended portion is overlapped above a rear differential device.

According to a second aspect of the present invention, the second seat mounting surface corresponding to the foot of the occupant of the third seat according to the first aspect is recessed downward.

According to a third aspect of the present invention, the third seat according to the first or second aspect is mounted on the third seat mounting surface in a close state, and the third seat is positioned on the third seat mounting surface in front of the hip point of the third seat. Thus, a vehicle width direction member protruding inside the seat cushion of the third seat is provided.

According to a fourth aspect of the present invention, both ends of the vehicle width direction member according to the third aspect are joined to the left and right strut towers.

[0018]

According to the first aspect of the present invention, the third seat mounting surface is offset above the second seat mounting surface and is stepped to form a gap between the third seat mounting surface and the rear differential device below the third seat mounting surface. On the rear side of the fuel tank, an extension is formed at the rear of the fuel tank from the second seat mounting surface of the floor panel to the third seat mounting surface, and the extended portion is mounted on the fuel tank. Since it is arranged in the space, the capacity of the fuel tank can be increased without affecting the living space around the foot of the second seat, and both the improvement in comfort and the capacity of the fuel tank can be achieved.

Further, since the extended portion of the fuel tank is arranged above the rear differential device so as to overlap, the noise of the rear differential device can be cut off by the extended portion, and the quietness in the cabin can be improved. it can.

According to the second aspect, in addition to the effect of the first aspect, the second seat mounting surface of the floor panel corresponding to the foot of the occupant of the third seat is recessed downward, so that the fuel tank is provided. Even if it extends toward the rear, it can expand the living space around the feet of the occupants of the third seat,
The livability of the third seat can be improved.

According to the third aspect, in addition to the effects of the first and second aspects, the third seat is mounted closely on the third seat mounting surface of the rear floor panel, and the third seat hip is mounted on the third seat mounting surface. Since the vehicle width direction member protruding inside the seat cushion of the third seat is disposed at a position forward of the point, not only the surface rigidity of the third seat mounting surface can be increased, but also at the time of a frontal collision or sudden braking. The thigh of the occupant of the third seat is supported by the vehicle width direction member, and the occupant of the third seat can be prevented from moving forward.

According to the fourth aspect, in addition to the effect of the third aspect, since both ends of the vehicle width direction member are joined to the left and right strut towers, the torsional rigidity of the rear portion of the vehicle body can be increased.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 5, reference numeral 1 denotes a front seat provided on the front floor panel 2.

Reference numerals 3 and 4 denote the rear of the front seat, a second seat mounting surface 5a formed on the rear floor panel 5.
And a second seat and a third seat respectively arranged on the third seat mounting surface 5b.

Of these, the front seat 1 and the second seat 3 are attached to the floor surface via unillustrated seat legs fixed to the floor surface, and the third seat 4 is attached to the third seat mounting surface 5b in close contact. is there.

The rear floor panel 5 comprises a rear floor front 5A and a rear floor rear 5B. The front end of the rear floor front 5A is connected to the rear end of the front floor panel 2, and a second seat is mounted. The surface 5a is formed one step higher toward the passenger compartment side than the front floor panel 2, and the main tank 6A of the fuel tank 6 is mounted below it.

The third seat mounting surface 5b is formed one step higher than the second seat mounting surface 5a, and a fuel tank is mounted between the third seat mounting surface 5b and a rear differential device 7 disposed below the third seat mounting surface 5b. At the rear of the main tank 6A of the fuel tank 6, an extension 6B is formed at the rear of the main tank 6A from the second seat mounting surface 5a of the rear floor panel 5 along the third seat mounting surface 5b. A portion 6B is disposed in the mounting space S of the fuel tank, and the extended portion 6B is connected to the rear differential device 7
Are overlapped above the

The lower surface of the fuel tank 6 is formed so as to be substantially parallel to the upper surface 6a, and the extending portion 6B is formed so as to rise obliquely upward and rearward in front of the rear differential device 7.

On the other hand, looking at the cross section of the fuel tank 6,
Since a floor tunnel 8 is formed in the center of the rear floor panel 5 so as to bulge in the front-rear direction toward the passenger compartment, the center of the upper surface 6a of the fuel tank 6 extends from the front end of the main tank 6A. A bulging portion 15 is formed substantially along the floor tunnel 8 over the portion where the fuel tank 6B rises to increase the capacity of the fuel tank 6, and the central portion of the lower surface of the fuel tank 6 is arranged in the front-rear direction. A concave portion 11 for passing the propeller shaft 9 and the exhaust tube 10 is formed.

In this embodiment, as will be described later, the second seat mounting surface 5a corresponding to the foot of the occupant of the third seat 4 is recessed downward, and the recessed portion 15 is provided. The bulging portion 16 and the concave portion 11 of the fuel tank 6
Are formed so that the connecting portions on both sides thereof are narrowed or closely contacted with each other. However, since the inside of the tank communicates in the front-rear direction, there is no practical problem.

Reference numeral 12 denotes a front upper surface 6a of the main tank 6A.
This gauge unit is a
2 is the upper end 12a of the upper surface 6a of the main tank 6A.
, And the lower end portion 12b is arranged obliquely toward one of the left and right tank bottom walls so as to avoid the recess 11 described above.

A rear side member 13 having an inverted hat-shaped cross section, which is a frame member in the front-rear direction, is joined to the lower surface of both sides of the rear floor panel 5.

In the present embodiment, the second seat mounting surface 5a of the rear floor panel 5 corresponding to the foot of the occupant of the third seat 4 is recessed downward, and a recess 15 is provided.

In addition to mounting the third seat 4 closely on the third seat mounting surface 5b of the rear floor panel 5 as described above, the third seat 4 is placed on the third seat mounting surface 5b more than the hip point of the third seat 4. At the front position, a vehicle width direction member 14 protruding inside the seat cushion of the third seat 4 is provided.

Further, both ends of the vehicle width direction member 14 are joined to strut towers (not shown) on both left and right sides.

In this embodiment, the vehicle width direction member 1
Since the above-mentioned rear floor front 5A and rear floor rear 5B are joined at the arrangement portion 4, the joining rigidity between the rear floor front 5A and the rear floor rear 5B can be increased.

According to the structure of the above embodiment, the third seat mounting surface 5b of the rear floor panel 5 is formed to be one step higher than the second seat mounting surface 5a, and the third seat mounting surface 5c and the lower side thereof are formed. A space S for mounting the fuel tank is secured between the rear tank 7 and the rear differential device 7, and the upper surface 6 a of the fuel tank 6 is located at the rear of the main tank 6 A from the second seat mounting surface 5 a of the rear floor panel 5 to the third seat mounting surface. 5B, the extending portion 6B is formed in the mounting space S of the fuel tank, so that the fuel tank 6 can be disposed without affecting the living space around the foot of the second seat 3. The capacity of the fuel tank can be increased, and both improvement in comfort and expansion of the capacity of the fuel tank can be achieved.

Further, since the extended portion 6B of the fuel tank 6 is arranged above the rear differential device 7 in an overlapping manner, the noise of the rear differential device 7 is cut off by the extended portion 6B, and the quietness in the cabin is reduced. Can be increased.

In addition, the second seat mounting surface 5a of the rear floor panel 5 corresponding to the foot of the occupant of the third seat 4
Is recessed downward, and the recessed portion 15 is provided. Therefore, even if the fuel tank 6 extends rearward, a sufficient living space around the feet of the occupant of the third seat 4 can be secured. Therefore, the comfort of the occupant of the third seat 4 can be improved.

Further, the third seat 4 is mounted in close contact with the third seat mounting surface 5b of the rear floor panel 5, and the third seat 4 is located on the third seat mounting surface 5b at a position forward of the hip point of the third seat 4. The vehicle width direction member 14 protruding into the interior of the seat cushion not only increases the surface stiffness of the third seat mounting surface 5b, but also allows the vehicle width direction member 14 to be used in the event of a frontal collision or sudden braking. The thigh of the occupant of the seat 4 is supported, and the occupant of the third seat 4 can be prevented from moving forward.

Moreover, since both ends of the vehicle width direction member 14 are joined to strut towers (not shown) on the left and right sides, the rigidity in the vehicle width direction and the torsional rigidity at the rear of the vehicle body can be increased.

In the above embodiment, the floor panel is divided into the front floor panel 2, the rear floor front 5A, and the rear floor rear 5B, and is partially shared with a general-purpose floor panel of a sedan type to enhance versatility, thereby reducing cost. However, it is of course possible to form them in a single panel.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is an exploded perspective view of the embodiment.

FIG. 5 is a diagram showing a relationship between a fuel tank and a rear differential device of the embodiment.

FIG. 6 is a side view of a conventional structure.

FIG. 7 is a side view of a conventional different structure.

[Explanation of symbols]

 1 Front Seat 3 Second Seat 4 Third Seat 5 Rear Floor Panel 5b Second Seat Mounting Surface 5c Third Seat Mounting Surface 6 Fuel Tank 6B Extension 6a Upper Surface 7 Rear Differential Device 14 Vehicle Width Member

Claims (4)

[Claims] 1. A fuel tank is mounted below a second seat mounting surface of a floor panel on which a second seat and a third seat are disposed behind a front seat, and a rear differential device is disposed below a third seat mounting surface. The third seat mounting surface is offset and formed stepwise above the second seat mounting surface, and is formed between the third seat mounting surface and the rear differential device below the third seat mounting surface. On the rear side of the fuel tank, an extension is formed at the rear of the fuel tank from the second seat mounting surface of the floor panel to the third seat mounting surface, and the extending portion is formed as the fuel tank mounting space. A floor structure of an automobile, wherein the extension portion is arranged to overlap above a rear differential device. 2. The vehicle floor structure according to claim 1, wherein a second seat mounting surface corresponding to a foot of an occupant of the third seat is recessed downward. 3. The vehicle width in which the third seat is mounted on the third seat mounting surface in close contact with the third seat, and the vehicle width protrudes into the seat cushion of the third seat at a position forward of the hip point of the third seat on the third seat mounting surface. The vehicle floor structure according to claim 1, further comprising a direction member. 4. The vehicle floor structure according to claim 3, wherein both ends of the vehicle width direction member are joined to the left and right strut towers.