JPH0687469A - Lower car body structure of automobile - Google Patents

Abstract

PURPOSE:To prevent the buckling of the vertical surface of the front side of a seat panel, and prevent the vibration of the seat panel by utilizing a gusset, which connects a seat panel and a floor frame, efficiently. CONSTITUTION:A floor frame 2 is joined under a floor panel, and a seat panel 14 is expanded upward of the floor panel like a step, and an engine 4 is provided under the seat panel 14. A fourth gusset 32, which is provided between the rear wall part 25 of the seat panel 14 and the floor frame 2, is provided with an opening 32a, in which an outside seat hook 51b provided in the rear end of the lower surface of a seat slider 10 positioned outside of a car body is fitted at the time of sudden braking, and on the other hand, the engine 4 is provided with a bracket 52, in which an inside seat hook 51a provided in the rear end of the lower surface of the seat slider 10 positioned inside of the car body is fitted at the time of sudden braking.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower vehicle body structure of an automobile, and more particularly, to a measure for increasing the rigidity and strength of a seat panel which is provided above a floor frame.

[0002]

2. Description of the Related Art Conventionally, for example, in automobiles, there has been an actual development of Sho 56.
As disclosed in Japanese Patent Publication No. 48961, there is a cab-over type in which an engine is mounted below a passenger compartment. In such a lower body structure of an automobile, interference with the engine is avoided. At the same time, in order to ensure visibility from above the seat, a seat panel for installing the seat is provided so as to bulge upward with respect to the floor panel.

In some automobiles, a floor frame extending in the front-rear direction at the vehicle body side end is joined below the floor panel.

[0004]

However, in the case where the seat panel is provided so as to bulge upward with respect to the floor panel as described above, the load of forward bending tends to concentrate on the vertical surface on the front side of the seat panel during sudden braking. There was a risk that the vertical surface would buckle.

If the seat panel as described above is provided so as to bulge upward with respect to the floor panel and the floor frame, the supporting rigidity for the seat panel becomes insufficient and the seat panel vibrates due to vehicle vibration. There is also a drawback.

The present invention has been made in view of the above points, and an object of the present invention is to provide a gusset between a seat panel and a floor frame for connecting the two, and by effectively utilizing the gusset, the seat panel can be effectively used. The purpose is to prevent buckling of the vertical surface on the front side and to prevent vibration of the seat panel.

[0007]

In order to achieve the above object, the means for solving the problems according to the invention as set forth in claim 1 is that a floor frame extending at the vehicle body side end portion in the front-rear direction is joined to a lower surface of a floor panel, and a seat is formed. It is premised on a lower vehicle body structure of an automobile in which a seat panel for installing the vehicle is provided so as to bulge upward in a step shape with respect to the floor panel, and an engine is arranged below the seat panel.
And, between the seat panel and the floor frame,
A gusset for connecting the seat panel and the floor frame is provided, and an opening for engaging a seat hook projecting downward from the seat during sudden braking is provided in the gusset.

Further, the solution means taken by the invention of claim 2 limits the seat of the invention of claim 1 and installs it on a seat panel via a seat slider.
At least a belt buckle is provided for engaging a seat belt retainer that protects an occupant on the seat. The seat hook is provided on the seat slider.

Further, the solution means taken by the invention according to claim 3 limits the configuration of the invention according to claim 1 or 2, and in addition to the seat hook engaging with the opening of the gusset, another seat hook is provided. Set up. Then, the engine is provided with a bracket for engaging the other seat hook during the sudden braking.

[0010]

With the above construction, in the invention according to claim 1,
During sudden braking, the seat hook engages with the opening of the gusset, and the gusset connects between the seat panel and the floor frame. The load of bending forward is supported by the frame.

Further, the gusset connects the floor panel and the seat panel that bulges upward with respect to the floor frame, so that the supporting rigidity for the seat panel is ensured and the vibration of the seat panel due to vehicle vibration is prevented. To be done.

According to the second aspect of the invention, since the seat hook is provided on the seat slider that installs the seat having the seat buckle of the seat belt on the seat panel, the load of the occupant through the seat belt is reduced. Even if it acts during sudden braking, the forward bending load during sudden braking is effectively suppressed by using the lever principle of the seat slider.

Further, in the third aspect of the invention, in addition to the seat hook at the vehicle outside position (vehicle body side end position) which engages with the opening of the gusset, it is provided at the vehicle body inside position on the engine installation side. Since the seat hook engages with the bracket provided on the engine during sudden braking, the forward bending load during sudden braking is more effectively suppressed by the seat hooks located inside and outside the vehicle body.

[0014]

As described above, according to the structure of the lower vehicle body of the automobile in the first aspect of the invention, the seat hook is engaged with the opening of the gusset that connects the seat panel and the floor frame during sudden braking. Since it has been combined, it is possible to suppress the forward bending load during sudden braking and prevent the vertical buckling of the front side of the seat panel, and also to secure the support rigidity for the seat panel with gussets to prevent the seat panel from vibrating. Vibration can be prevented.

According to the vehicle body structure of the lower part of the invention, the seat hook is installed on the seat panel via the seat slider, on which the seat belt acts when the occupant's load is suddenly braked. Therefore, by the lever principle of the seat slider, it is possible to effectively suppress the load of forward bending at the time of sudden braking and prevent the vertical buckling on the front side of the seat panel.

Further, according to the structure of the lower vehicle body of the automobile in the third aspect of the invention, since the other seat hook in the inner position of the vehicle body is engaged with the bracket of the engine during the rapid braking, It is possible to more effectively suppress the load of forward bending by the seat hooks located inside and outside the vehicle body and prevent the vertical buckling on the front side of the seat panel.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 6 and 7 show the lower part of an automobile using the lower body structure according to the embodiment of the present invention.
As the frame structure, a frame structure having floor frames 2 and 2 having a substantially U-shaped cross section that extends in the front-rear direction at the lower end side of the vehicle body is adopted, and the engine 4 is mounted below the vehicle interior 3. A cab-over type one-box car is applied. Moreover, as the engine 4,
In-line 4-cylinder D / O / H each having a drive shaft (not shown) extending in the longitudinal direction of the vehicle body and a pair of left and right camshafts
・ C (double over head camshaft) type is applied. A tunnel portion 6 projecting upward with respect to a substantially flat floor panel 5 constituting the floor surface of the vehicle compartment 3 is provided at a front end position in the vehicle compartment 3 at a central portion in the vehicle width direction in the vehicle compartment 3. It is provided so as to extend further rearward so that the rigidity strength of the vehicle body can be enhanced. The tunnel portion 6 is formed integrally with the front end portion inside the vehicle compartment 3 by being protruded upward by the floor panel 5, and the remaining rear portion is formed by the tunnel material 7 having a substantially U-shaped cross section. Has been formed. The upper surface of the tunnel material 7 (the rear side portion of the tunnel portion 6) is inclined obliquely upward so that it becomes higher toward the rear. The frames 2 are joined and fixed to the lower surface of the floor panel 5.

The floor panel 5 is composed of a front floor panel 11 which constitutes the floor surface of the front seat occupant seated on a front seat 13 which will be described later, and a rear floor panel 12 which constitutes the floor surface of the rear seat occupant. Between the front floor panel 11 and the rear floor panel 12, that is, at the rear left and right side positions of the tunnel portion 6, a seat panel 14 for installing a front seat 13 (seat) is installed on the floor panel 5 (front floor panel 11 and It is provided so as to bulge upward with respect to the rear floor panel 12). The front seat 13 is composed of a seat cushion 13a and a seat back 13b, and the seat cushion 13a has an upper surface of the seat panel 14 via a pair of seat sliders 10, 10 extending in the vehicle front-rear direction on the lower surface inside and outside the vehicle body. The front seat 13 can be slid in the front-rear direction of the vehicle body.

As shown in FIG. 5, the front lower surface of the front floor panel 11 is joined and fixed to the rear upper end surface of the front lower frame 15 having a substantially V-shaped cross section. The upper end surface of the front part is joined and fixed to the lower surface of the front end part of the front floor panel 11 via a dash lower panel 19 described later. further,
On the side of the front floor panel 11, there is provided a step portion 16 that facilitates getting on and off of front passengers. The step portion 16 has a step panel 17 having a substantially L-shaped cross section in which an upper end of an inner end portion is joined and fixed to a lower surface of a side end portion of the front floor panel 11, and an upper end portion is joined and fixed to an outer end portion of the step panel 17. The side sill portion 18a is formed. An inner surface of the front portion of the step panel 17 is joined and fixed to a rear outer end of the front lower frame 15 and extends forward, and a front end portion of the front portion of the front lower frame 15 is formed.
It is bonded and fixed to the front and rear surfaces of the.

The side sill portion 18a is joined to and fixed to the outer end of the front lower frame 15 from the front end portion thereof and the cowl side portion 18b extending upward along the front lower frame 15 and the step panel. 17 Center pillar portion 18 extending upward from the rear end position
and c are integrally formed. Center pillar section 1
An inner end surface of the first gusset 20 having a holding portion 20a for holding the floor frame 2 so as to hold the floor frame 2 from above and below at the inner end lower end position of 8c. The floor frame 2 by the holding portion 20a through the first gusset 20.
The supporting rigidity of the lower end of the center pillar portion 18c can be effectively increased by joining and fixing to the center pillar portion 18c.
Further, the front end portion of the front floor panel 11 has a dash lower panel 19 for partitioning the auxiliary compartment accommodating space H for accommodating auxiliary components such as the battery B and the blower A of the air conditioner and the passenger compartment 3 at a lower position. The lower end portion is joined and fixed, and the outer end portion of the dash lower panel 19 is joined and fixed to the inner surface of the front end portion of the cowl side portion 18b.

Further, the seat panel 14 is provided with an extension tunnel portion 21 for bulging the central portion in the vehicle width direction further upward to extend the tunnel portion 6 rearward. The extension tunnel portion 21 is formed of an extension tunnel material 29, and is formed in a step shape with respect to the upper surface of the seat panel 14 in front view of the vehicle body, and is a step portion lower than the uppermost portion 21a of the extension tunnel portion 21. By 21b, interference with the engine block 4a of the engine 4 is avoided. In addition, the seat panel 1
4 is provided with an edge portion on the upper surface thereof, and has a service hole 22 for servicing the engine 4 from the upper surface side of the seat panel 14, and a lower end is a rear portion of the front floor panel 11 and a rear portion of the tunnel member 7. A vertical panel member having a substantially L-shaped cross section, which is joined and fixed to each end and stands up at a substantially right angle, and has a front edge portion 23a which constitutes a front edge of the upper surface of the seat panel 14 and a front edge of the extension tunnel portion 21 at the upper end. 23
(Longitudinal surface), the lower end is joined and fixed to the rear portion of the inner end of the step panel 17 and the rear portion of the upper edge of the side sill portion 18a, respectively, and stands up at a substantially right angle along the center pillar portion 18c, and the upper surface of the seat panel 14. A side panel material 24 having a substantially L-shaped cross section having a side edge portion 24a forming a side edge at its upper end.
And the front end is bonded and fixed to the rear end of the extension tunnel portion 21 and the rear end of the inner end of the side panel member 24, respectively.
A rear panel member 25 having a rear edge portion 25a which constitutes a rear edge of the upper surface of the seat panel 14 at the front end portion, is inclined obliquely downward so as to become lower toward the rear, and the uppermost portion 21a of the extension tunnel portion 21. Rear panel material 25 corresponding to the rear
An opening 26 that opens to the rear, a second gusset 27 having a substantially U-shaped cross section that closes the opening 26 so that the uppermost portion 21a of the extension tunnel portion 21 projects rearward to the rear end of the rear panel material 25, and The rear panel member 25 is rotatably supported by the rear edge portion 25a of the rear panel member 25 via a pair of left and right hinges 34, 34, and is disposed on the upper edge portion of the seat panel 14 (the step portion 21b of the extension tunnel portion 21, the vertical panel member). 23 front edge 2
3a, a side edge portion 24a of the side panel material 24, and a rear edge portion 25a of the rear panel material 25, the peripheral edge portion of the service lid 33 is in contact with the service hole 22 from above. Further, a cross member 28 having a substantially U-shaped cross section that extends in the vehicle width direction is joined and fixed to the lower surface of the front end portion of the rear floor panel 12, and is also joined and fixed to the floor frames 2 and 2 and each floor is Frame 2
Between them, a closed cross section extending in the vehicle width direction is formed. Then, a belt buckle 35 for engaging a seat belt holder (not shown) for protecting an occupant on the front seat 13 at the inner end of the service lid 33 corresponding to the step portion 21b of the extension tunnel portion 21 ( 1) is provided. Further, the rear end portion of the rear panel material 25 is bonded and fixed to the front end of the rear floor panel 12.

Then, a part of the rear end of the front floor panel 11 corresponding to the floor frame 2 (portion outside the extension tunnel portion 21) is located rearward of the joint fixing portion with the vertical panel member 23. Between the upper surface of the rear end of the front floor panel 11 corresponding to the floor frame 2 and the lower surface of the front edge 23a of the vertical panel member 23, a joint is fixed between the two. A third gusset 31 having a substantially U-shaped cross section, which has a substantially trapezoidal shape in a side view of the vehicle body, is joined and fixed. The front surface of the third gusset 31 is also bonded and fixed to the rear surface of the vertical panel member 23.
The rigidity strength of No. 3 is increased by the floor frame 2 via the third gusset 31. Further, as shown in FIGS. 1 and 2, the seat slider 10 at the outer position of the front seat 13 corresponds to the upper side of the floor frame 2, and the upper surface of the floor frame 2 and the lower side of the seat slider 10. Between the corresponding lower surface of the rear panel member 25 of the seat panel 14 and a fourth plate having a substantially U-shaped cross section which is substantially trapezoidal in a side view of the vehicle body so as to connect the both.
A gusset 32 (gusset) is provided, and the rigidity of the rear panel material 25 of the seat panel 14 is increased by the floor frame 2 via the fourth gusset 32.

A steering member 42 having a substantially circular cross section is provided in front of the upper portion of the seat panel 14 in the vehicle compartment 3 for supporting a steering shaft 41 extending substantially in the front-rear direction of the vehicle body. The steering member 42 is arranged so as to extend in the vehicle width direction, and each end thereof is joined and fixed to the cowl side portion 18b. Further, upper ends of steering stays 43, 43 for supporting a substantially middle portion of the steering member 42 downward are joined and fixed to the steering member 42. Each of the steering stays 43 has a shape in which the front-rear width is increased as the lower end is approached so that the lower end of the steering stay 43 is fixedly joined to the vertical panel members 23 on the front side of the left and right seat panels 14 and the front floor panel 11. It is fastened and fixed to the vertical panel material 23 and the front floor panel 11 via the flange portion 43a that is formed and is bent at a substantially right angle at the lower end according to the vertical panel material 23 and the front floor panel 11. It is like this. Further, the lower end portion of each steering stay 43 is arranged along the side wall surface of the tunnel portion 6 (tunnel material 7), the lower surface is bonded and fixed to the upper surface of the tunnel portion 6, and the side surface projects upward. It is fastened and fixed to the side surface of the bracket 45 having a substantially U-shaped cross section.

As a characteristic part of the present invention, as shown in FIGS. 3 and 4, the lower surface rear end portion of each seat slider 10 at the inside / outside position of the front seat 13 (seat cushion 13a) has the above-mentioned structure. Inner and outer seat hooks 51a and 51b, which are substantially J-shaped in a side view of the vehicle body that penetrates the service lid 33 and projects downward, are joined and fixed. Further, on the upper surface of the fourth gusset 32, the outer seat hook 51 at the vehicle body outer position of the front seat 13 is provided.
An opening 32a that can be engaged and disengaged is provided to engage b with the vehicle during sudden braking. The tip of the outer seat hook 51b is inserted into the fourth gusset 32 through the opening 32a. Further, the engine block 4a of the engine 4
The rear end portions of the left and right side walls of the bracket 5 have a substantially L-shaped cross section.
2, 52 are fastened and fixed by bolts 53, 53. Each of the brackets 52 corresponds to the engine block 4a.
The first piece 52a facing the left and right side wall surfaces of the
a second piece 52b that projects outward at substantially right angles to a, and a first opening 54 that is provided at the upper end of the first piece 52a and that engages with a vehicle-mounted hook (not shown) when the engine 4 is mounted on the vehicle. ,
An outer seat hook 51b provided on the outer end of the second piece 52b and engaging with the opening 32a of the fourth gusset 32.
Another front opening 13 is a second opening 55 that is engageable and disengageable to engage an inner seat hook 51a (another seat hook) at the vehicle body inner side position during sudden braking. in this case,
While the seat hooks 51a and 51b are not engaged with the opening 32a of the fourth gusset 32 and the second opening 55 of the bracket 52 when the service lid 33 is opened, the seat hooks 51a and 51b are not engaged with each other during sudden braking. The forward displacement of 10 causes the opening 32 of the fourth gusset 32 to
a and the second opening 55 of the bracket 52, respectively.

In FIG. 4, reference numeral 56 is an exhaust pipe, and 57 is an insulator that shields the base end of the exhaust pipe 56 from the passenger compartment 3 side (upward). Further, in FIG. 2, 58 is the service lid 3.
3 is a rubber cushioning member that elastically abuts the edge portion of the rear panel member 3 with the rear edge portion 25a of the rear panel member 25.
Are provided over the entire upper surface edge portion of the seat panel 14.

Therefore, in the above embodiment, during sudden braking,
The tip of the outer seat hook 51b at the rear end of the lower surface of the seat slider 10 at the vehicle body outer side position of the front seat 13 connects the upper surface of the floor frame 2 and the lower surface of the rear panel material 25 of the seat panel 14 below the seat slider 10. While engaging with the opening 32a of the fourth gusset 32, the inside seat hook 51 at the rear end of the lower surface of the seat slider 10 at the vehicle body inside position of the front seat 13
Since the tip of a engages with the second opening 55 of the second piece 52b of the bracket 52, the load of forward bending which tends to buckle the vertical surface on the front side of the seat portion during sudden braking is applied to the occupant via the seat belt. Even if it acts with the load of, it will be supported by the frame 2 and the engine 4.

As a result, the lifting of the seat panel 14 at the rear end of each seat slider 10 is suppressed by using the lever principle of each seat slider 10, and the forward bending load during sudden braking is effectively suppressed. Will be done. Moreover, the steering stays 42 are fastened and fixed to the front floor panel 11 and the vertical panel member 23 by the respective flange portions 43a at the lower ends of the steering stays 43 and 43 whose upper ends are joined, and also to the side wall surface of the tunnel member 7. Since the steering stays 43 are fastened and fixed to each other via the brackets 45, the steering stay 43 has the lower end portion of the steering stay 43, which is the vertical panel member 23 on the front side of the seat panel 14.
And the corners of high rigidity that are adjacent to each other corresponding to the side wall surface of the tunnel portion 6 serve as supporting rods, and the vertical panel member 23 on the front side of the seat panel 14 is to be buckled during sudden braking. It is possible to sufficiently resist the load of forward bending that occurs, and the load of forward bending that is exerted via the support rod during sudden braking is reliably suppressed. As a result, in combination with the prevention of lifting of the seat panel 14 at the rear end of each seat slider 10 due to the principle of leverage of each seat slider 10,
The rigidity of the vertical panel member 23 on the front side of the seat panel 14 can be more effectively improved, and the buckling of the vertical panel member 23 on the front side of the seat panel 14 can be reliably prevented.

The vertical panel material 2 of the seat panel 14
3, between the side panel material 24 and the rear panel material 25 and the floor frame 2
By the third and fourth gussets 20, 31, 32, the supporting rigidity for the seat panel 14 that bulges upward with respect to the front floor panel 11 and the floor frame 2 is ensured, and the seat panel 14 due to vehicle body vibration is secured.
Vibration can be prevented.

Moreover, the bracket 52 has the first piece 5 thereof.
Since it is used as an engine hanger having the first opening 54 in 2a, it is not necessary to provide a separate bracket for engaging the tip of the inner seat hook 51a at the vehicle body inner side position of the front seat 13, The sharing is achieved, which is very advantageous for implementation.

The present invention is not limited to the above embodiment, but includes various other modifications.
For example, in the above-described embodiment, the vertical panel member 23 of the seat panel 14 is reinforced by the steering stays 43, but the structure is such that the seat hook is provided at the rear end of each seat slider to prevent the seat panel from rising. The vertical panel material of the seat panel may be reinforced.

Further, in the above embodiment, the seat panel 14
The service hole 22 is provided on the upper surface of the vehicle, and the service hole 22 is covered with the service lid 33. The service hole covered with the seat panel is provided between the front floor panel and the rear floor panel, and the seat panel and the rear floor panel are provided. There is a rotating hinge between
The service hole may be covered with a seat panel that is opened and closed by the rotary hinge.

Further, in the above embodiment, the seat hook 5
Although 1a and 51b are provided on the rear end portion of the lower surface of each seat slider 10, the seat hook may be provided only on the seat slider at the outer position of the front seat or on the seat panel itself.

[Brief description of drawings]

FIG. 1 is a perspective view of the vicinity of a seat panel on the left side of a vehicle body as viewed obliquely from the rear.

FIG. 2 is a vertical cross-sectional side view illustrating an engaged / disengaged state of an outer seat hook in the vicinity of a fourth gusset.

FIG. 3 is a vertical sectional front view of the vicinity of a front seat.

FIG. 4 is a perspective view of the engine as viewed from the front left side of the vehicle body.

FIG. 5 is a perspective view on the left side of the passenger compartment.

FIG. 6 is a side view of a front portion of the vehicle compartment with a part cut away.

FIG. 7 is a plan view of a front portion of a vehicle compartment.

[Explanation of symbols]

 2 floor frame 4 engine 5 floor panel 10 seat slider 13 front seat (seat) 14 seat panel 32 fourth gusset (gusset) 32a opening 35 seat buckle 51a inner seat hook (other seat hook) 51b outer seat hook (seat hook) 52 bracket

Claims (3)

[Claims] 1. A floor frame having a vehicle body side end extending in the front-rear direction is joined to a lower surface of the floor panel, and a seat panel for installing a seat is provided so as to bulge upward with respect to the floor panel. In addition, in the lower body structure of the automobile in which the engine is arranged below the seat panel, a gusset that connects the seat panel and the floor frame is provided between the seat panel and the floor frame. The lower body structure of an automobile, wherein the gusset is provided with an opening for engaging a seat hook protruding downward from the seat during sudden braking. 2. The seat is installed on a seat panel via a seat slider, and has at least a belt buckle for engaging a seat belt holder that protects an occupant on the seat. The lower vehicle body structure of the automobile according to claim 1, wherein the hook is provided on the seat slider. 3. A seat hook other than the seat hook engaged with the opening of the gusset is provided, and
3. The lower body structure for a vehicle according to claim 1, wherein the engine is provided with a bracket that engages the other seat hook during sudden braking.