JP3381675B2 - Body structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of a vehicle body floor portion.

[0002]

2. Description of the Related Art As a conventional body structure for a vehicle body floor,
For example, FIG. 19 described in Japanese Patent Laid-Open No. 9-99870.
There is one shown in. FIG. 19 shows the floor structure 1, which includes a floor body 3 and side sills 5. The floor structure 1 is formed of an extruded material of a light metal such as aluminum or magnesium, and its extrusion direction is the vehicle front-rear direction.

According to the vehicle body structure having such a floor structure, the number of parts can be reduced, the vehicle body can be easily assembled, and the weight can be reduced.

[0004]

However, since the floor structure 1 formed of such an extruded material has a substantially uniform cross section in the vehicle front-rear direction, the strength distribution is uniform from the front end to the rear end. Therefore, when a side impact collision is applied to the side sill 5 and the floor main body 3 regardless of the position of the center pillar (not shown), the deformation mode of the side sill 5 and the floor main body 3 is centered in the vehicle longitudinal direction center portion. It becomes a bending deformation inward in the vehicle width direction.

Therefore, the apparent reaction force of the floor structure increases under the center pillar, and the load acting on the center pillar or the like may increase. Therefore, a large amount of reinforcement is required, resulting in an increase in weight. I was afraid.

It is an object of the present invention to provide a vehicle body structure which makes the vehicle body deformation mode ideal and can achieve a further weight reduction.

[0007]

According to a first aspect of the present invention, a dash cross member, which is a skeleton member, is coupled to a front end of a floor body formed in a substantially uniform cross section in the vehicle front-rear direction, and the floor body of the floor body is formed. A floor structure having a rear cross member, which is a skeleton member, is attached to a rear end thereof, and a side sill is formed on a side portion of the floor structure, and a pillar is provided between a center of the floor body in the front-rear direction of the vehicle and the rear end of the floor. Tie the lower end
The floor body and the center of the floor body in the vehicle front-rear direction of at least one of the side portion and the side sill of the floor body.
Between the lower end portion of the pillar and the lower end portion of the pillar, the strength adjusting portion relatively reducing the collision reaction force generated on the lower end portion side of the pillar at the time of a vehicle side collision relative to the collision reaction force generated on the center side in the vehicle body front-rear direction of the floor body. Is provided.

A second aspect of the present invention is the vehicle body structure according to the first aspect, wherein the strength adjusting portion reduces the strength on the lower end side of the pillar more than the strength on the center side in the vehicle body front-rear direction of the floor body. It is characterized by

According to a third aspect of the present invention, in the vehicle body structure according to the first aspect, the strength adjusting portion increases the strength of the floor main body in the front-rear direction center side of the pillar body more than the strength of the lower end side of the pillar. It is characterized by

According to a fourth aspect of the present invention, in the vehicle body structure according to any one of the first to third aspects, the floor main body is formed of a light metal extruded material whose extrusion direction is the vehicle longitudinal direction. Characterize.

According to a fifth aspect of the present invention, in the vehicle body structure according to the fourth aspect, an inner portion of the side sill is integrally formed on a side portion of the floor body, and an outer portion and a pillar of the side sill are made of a light metal. It is characterized by being formed from a casting material.

A sixth aspect of the present invention is the vehicle body structure according to any one of the first to third aspects, wherein the strength adjusting portion is formed by forming the side sill with a light metal casting material to partially thicken the side sill. It is characterized by being provided by doing.

The invention according to claim 7 is the vehicle body structure according to any one of claims 1 to 3, wherein the strength adjusting portion sets a reinforcing plate on the side sill, and a hole and a plate thickness of the reinforcing plate. , Is provided by adjusting at least one of the strengths.

The invention according to claim 8 is the vehicle body structure according to any one of claims 1 to 3, wherein the strength adjusting portion is provided with a rib on the side sill, and the shape, number, arrangement and height of the ribs are increased. It is characterized in that it is provided by adjusting at least one of the thicknesses.

A ninth aspect of the present invention is the vehicle body structure according to any one of the first to third aspects, wherein the strength adjusting portion is formed of a plate material for the side sill and a bulkhead is set therein. It is characterized in that it is provided by adjusting at least one of the shape, number, arrangement, height and thickness of the bulkhead.

A tenth aspect of the present invention is the vehicle body structure according to any one of the first to third aspects, wherein the strength adjusting portion is at least one of a crushed bead, a hole and a groove portion on a side portion of the floor body. It is characterized in that the reinforcing material having the above is connected and provided.

An invention according to claim 11 is the vehicle body structure according to any one of claims 1 to 3, wherein the strength adjusting portion is formed by connecting a component mounting member for mounting a component to the floor body or the side sill. It is characterized by being formed by a component mounting member and the component to be mounted.

According to a twelfth aspect of the present invention, in the vehicle body structure according to the eleventh aspect, the component mounting member is formed of any one of a light metal extruded material, a cast material, and a plate member.

[0019]

According to the invention of claim 1, the collision reaction force generated on the lower end side of the pillar at the time of the side collision of the vehicle (the floor at the time of collision)
Of reaction force generated in the process of deformation or destruction of structures
It is possible to reduce the meaning) relative to the center of the floor body in the front-rear direction of the vehicle body by the strength adjusting portion, and it is possible to set an ideal deformation mode in the case of a side collision of the vehicle. Therefore, the load acting on the pillar or the like is reduced, the increase in the plate thickness of the pillar or the like is suppressed, and the weight can be further reduced.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, the strength of the lower end portion of the pillar is reduced more than the strength of the floor main body in the longitudinal direction of the vehicle body.
It is possible to more reliably approach the ideal deformation mode.

According to the third aspect of the invention, in addition to the effect of the first aspect of the invention, the strength of the floor main body in the front-rear direction center side of the floor body is increased more than the strength of the lower end side of the pillar.
It is possible to more reliably approach the ideal deformation mode.

According to the invention of claim 4, in addition to the effect of any one of the inventions of claims 1 to 3, the floor main body is formed of a light metal extruded material whose extrusion direction is the vehicle front-rear direction, thereby reducing the number of parts. In addition, the weight of the vehicle body can be reduced.

According to the invention of claim 5, in addition to the effect of the invention of claim 4, the inner portion of the side sill is integrally formed on the side portion of the floor main body, and the outer portion and the pillar of the side sill are cast of light alloy. By being formed, the number of parts can be further reduced and the weight can be reduced.

According to the invention of claim 6, in addition to the effect of any one of claims 1 to 3, the strength adjusting portion is formed by forming the side sill with a casting material of a light alloy to partially thicken it. The strength adjusting portion can be easily provided without increasing the number of parts.

According to the invention of claim 7, in addition to the effect of any one of claims 1 to 3, the rib shape, number, arrangement, height,
Since the strength adjusting section is provided by adjusting at least one of the thicknesses, the setting of the strength adjusting section is easy, and it becomes easier to approach the ideal deformation mode. Moreover, the crushing deformation of the side sill can be suppressed by the plurality of ribs, and the reinforcing effect can be enhanced.

According to the invention of claim 8, in addition to the effect of any one of claims 1 to 3, a strength adjusting portion is provided by adjusting at least one of the shape, number, arrangement, height and thickness of the bulkhead. Since it is easier to adjust the collision reaction force,
It becomes easy to approach a more ideal deformation mode.
Moreover, the bulkhead can prevent the side sills from being deformed and deformed, and can enhance the reinforcing effect.

According to the invention of claim 9, in addition to the effect of any one of claims 1 to 3, a reinforcing material having at least one of a crushed bead, a hole and a groove is connected to a side portion of the floor body. Since the strength adjusting portion is provided, the collision reaction force can be adjusted more easily, and it becomes easier to approach the ideal deformation mode. Further, even when the side sill cannot be reinforced, it is possible to easily approach the ideal deformation mode by combining the reinforcing materials.

According to the invention of claim 10, in addition to the effect of any one of the inventions of claims 1 to 3, the strength is adjusted by using a component mounting member to be coupled to the floor body or the side sill and a component mounted to this component mounting member. Since the portion can be formed, the structure can be further simplified.

According to the invention of claim 11, in addition to the effect of the invention of claim 10, the strength adjusting portion can be easily formed by the component mounting member.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIGS. 1 to 8 show a first embodiment of the present invention. 1 is an overall exploded perspective view, FIG. 2 is a partially omitted perspective view of an assembled state, and FIG. 3 is a sectional view taken along the line III-III of FIG. In the vehicle body structure according to the first embodiment of FIGS. 1 to 3, the floor structure 1 and the body side structure 7 are shown.

The floor structure 1 includes a floor body 3, a dash cross member 11, and a rear cross member 13.

The floor body 3 is formed in a substantially uniform cross section in the vehicle front-rear direction and is made of a light metal extruded material such as aluminum or magnesium. The extrusion direction is the vehicle front-rear direction.

That is, the floor body 3 is the tunnel portion 1 at the center.
5 and the floor portions 17 on both sides thereof and the inner portions 19 of the side sills 5 provided at both ends of the floor portion 17 are integrally formed by extrusion molding. The tunnel portion 15, the floor portion 17, and the inner portion 19 of the side sill 5 each have a hollow shape, and the floor portion 17 has partition walls 17a and 17b.

A dash cross member 11 forming the skeleton member is connected to the front end of the floor body 3 and a rear cross member 13 forming the skeleton member is connected to the rear end thereof. The dash cross member 11 and the rear cross member 13 are formed of an extruded material of a light metal such as aluminum and magnesium in the same manner as the floor body 3 in the present embodiment, and the extrusion direction thereof is the vehicle width direction.

The dash cross member 11 and the rear cross member 13 may be formed of a light metal casting material or a plate material.

The dash cross member 11 and the rear cross member 13 are provided with recesses 11a, 13a facing the tunnel portion 15 at the center in the vehicle width direction, and the dash cross member 11 and the rear cross member 13 are provided.
Are inserted between the front end and the rear end of the inner portion 19 of the side sill 5, respectively.
5. It is fixed to the floor portion 17 by welding or the like.

In the present embodiment, the body side structure 7 is made of a cast material of a light metal such as aluminum and magnesium and has a center pillar 21 as a pillar. The lower end portion 21 a of the center pillar 21 is integrally connected to the outer portion 23 of the side sill 5.
The lower end of the front pillar 25 is coupled to the front end of the outer portion 23, and the roof side rail 27 is provided at the upper end of the front pillar 25. The outer portion 23 of the side sill 5 of the body side structure 7 is joined to the inner portion 19 of the floor structure 1 by welding or the like.

In this state, the center pillar 21
Is located slightly to the rear, deviating from the center of the floor body 3 in the front-rear direction.

On the other hand, in this embodiment, as shown in FIGS. 1 and 4, the strength adjusting portion 2 is provided on the outer portion 23 of the side sill 5.
9 is provided.

The strength adjusting portion 29 reduces the collision reaction force generated on the lower end portion 21a side of the center pillar 21 in the side collision of the vehicle relative to the collision reaction force generated on the center side of the floor body 3 in the vehicle front-rear direction. By partially thickening the outer portion 23 of the side sill 5 formed of a light metal casting material, the lower end portion 21a of the front pillar 21 is
To the center of the floor body 3 in the front-rear direction of the vehicle body, the strength is gradually increased. That is, the strength of the floor body 3 on the center side in the vehicle body front-rear direction is made higher than the strength of the center pillar 21 on the lower end portion 21a side.

Specifically, the general portion 31 of the outer portion 23
Of the center pillar 21 at a position 33 corresponding to the center of the floor body 3 in the front-rear direction of the floor body 3, which is thicker than t0. The plate thickness distribution is gradually reduced from the central corresponding position 33 until the wall thickness t2 (≈t0) is reached at a position slightly rearward from the portion where 21a naturally disappears to the side sill.

Next, the operation will be described. First, in a vehicle body structure including a floor structure 1 in which a floor main body 3 is generally formed of a light metal extruded material, and front and rear thereof are connected to a dash cross member 11 and a rear cross member 13, The vehicle body deformation phenomenon when an input is received from the side of the vehicle body at the time of a collision will be described.

As shown in FIG. 5, when the input F acts on the center pillar 21 from the side of the vehicle body, the floor body 3 and the like are deformed, so that the lower end portion 21a of the center pillar 21 is deformed as shown in FIG.
Goes inward in the vehicle width direction.

Specifically, the side sill 5 has a structure shown in FIG.
A bending moment M1 as shown in (c) acts. After that, a crush load is applied to the floor body 3 due to the bending deformation of the side sill 5.

At this time, the bending moment M1 generated in the side sill 5 shown in FIG. 7 (c) becomes maximum on the side of the center of the floor body 3 in the vehicle front-rear direction. Therefore, in the case where the floor main body 3 made of an extruded material has a substantially uniform cross section in the vehicle front-rear direction, the reaction force (strength) determined by the side sill 5 and the floor main body 3 as shown by the dotted line in FIG. 7B. The characteristic becomes constant, and when the bending moment M1 is applied, the maximum approach amount L1 is generated at the substantially center side of the floor body 3 in the vehicle front-rear direction as shown by the dotted line in FIG.

Next, the deformation of the center pillar 21 of the body side structure 7 due to the above deformation will be described. Figure 5
As shown in FIG. 6, when the load F is applied from the side, the lower end 21a of the center pillar 21 itself moves in the vehicle width direction along with the deformation of the side sill 5 and the floor body 3 as shown in FIG. It bends and deforms as it enters.

At this time, the lower end portion 21 of the center pillar 21
The relationship between the amount of entry L1 of a and the bending moment M2 generated in the center pillar 21 is shown in FIG. That is, since the bending moment M2 is inversely proportional to the lower end portion entry amount L1, it is necessary to increase the lower pillar entry amount L1 in order to prevent the center pillar 21 from being bent and deformed.

However, the entry amount L1 must be below a certain value in relation to the living space. In other words, while reducing the generated moment of the center pillar 21, the amount of entry of the center pillar 21 is controlled by the side sill 5 and the floor body 3.
It is structurally advantageous to match the maximum entry amount determined by the deformation of

In the first embodiment of the present invention, as described above, since the strength adjusting portion 29 is provided on the outer portion 23 of the side sill 5 by setting the wall thickness as shown in FIG. 4, the maximum bending moment M1 is generated. A certain center portion of the floor body 3 in the vehicle front-rear direction is reinforced by the plate thickness t1 and the plate thickness distribution is t toward the lower end 21a of the center pillar 21.
Since it is gradually reduced to 2, the maximum deformation of the side sill 5 and the floor main body 3 is substantially reduced by the lower end 21a of the center pillar 21.
It can occur in the vicinity. That is, without increasing the bending moment M2 generated in the center pillar 21 itself, the deformation amount (entry amount) of the side sill 5 and the floor main body 3 can be set to L1, and a living space can be secured.

Thus, it is not necessary to increase the thickness of the center pillar 21 and the like, and the weight can be further reduced. Further, in the present embodiment, since the strength adjusting portion 29 is provided by setting the plate thickness of the outer portion 23 of the side sill 5, the strength distribution can be made continuous without increasing the number of parts, and thus the outer portion 23 can be formed. Suppresses local deformation of
Energy can be absorbed in a wide range.

(Second Embodiment) FIGS. 9 and 10 relate to a second embodiment of the present invention. FIG. 9 is a perspective view of essential parts, and FIG.
FIG. 7 is a cross-sectional view taken along line XX of FIG. The components corresponding to those in the first embodiment will be described with the same reference numerals, and duplicate description will be omitted.

On the other hand, in the present embodiment, the reinforcing plate 37 is set in the outer portion 23 of the side sill 5 as the strength adjusting portion. Then, holes 37a and 37b are provided in the vicinity of the rear end of the reinforcing plate 37 to increase the strength of the floor body 3 on the vehicle body front-rear direction center side rather than the strength of the center pillar 21 on the lower end 21a side.

Therefore, similarly to the first embodiment, the collision reaction force generated at the lower end portion 21a of the center pillar 21 is relatively reduced as compared with the collision reaction force generated at the center of the floor body 3 in the vehicle longitudinal direction. Therefore, it is possible to obtain substantially the same operational effects as the first embodiment.

Further, in the present embodiment, the reinforcing plate 37 can be provided afterwards, and the setting as the strength adjusting portion is easy. Further, in the present embodiment, the outer portion 23 of the side sill 5, the center pillar 21, and the like can be molded from a light metal casting or a plate material.

FIG. 11 relates to a modified example of the present embodiment, in which a reinforcing plate is provided as a strength adjusting portion. The reinforcing plate is provided from the center of the floor body 3 in the vehicle front-rear direction to the front of the lower end 21a of the center pillar 21. The outer part 23 is provided with the first reinforcing plate 39a and the second reinforcing plate 39b which is thinner or weaker than the first reinforcing plate 39a.

Therefore, the lower end portion 21 of the center pillar 21 is
It is possible to increase the strength of the floor main body 3 on the center side in the vehicle body front-rear direction than the strength of the a side, and it is possible to achieve substantially the same operational effects as in FIGS.

On the other hand, in the example of FIG. 11, the increase in strength can be set under the same condition over the entire cross section of the outer portion 23 of the side sill 5. Therefore, when a load is applied from the side, the starting point of the deformation of the outer portion 23, that is, the maximum deformation point of the side sill 5 and the floor main body 3 can be generated near the lower end portion 21a of the center pillar 21.

(Third Embodiment) FIG. 12 shows a third embodiment of the present invention.
It is a principal part perspective view which concerns on embodiment. It should be noted that the components corresponding to those in the above-described embodiment will be described with the same reference numerals, and the duplicated description will be omitted.

On the other hand, in this embodiment, the side sill 5 is used.
Of the outer part 23 is formed of a plate material, and ribs or bulkheads 41a, 41b, 4 are formed on the inner surface of the outer part 23.
1c, 41d and 41e are arranged at equal intervals to form a strength adjusting portion.

That is, ribs or bulkheads 41a-4
1e is partially arranged from the center of the floor main body 3 in the front-rear direction of the vehicle to slightly in front of the lower end 21a of the center pillar 21. This rib or bulkhead 41a-41e
Is a light alloy casting or plate, and its height or plate thickness is gradually reduced from the front rib or bulkhead 41a to the rear rib or bulkhead 41e. Therefore, also in the present embodiment, it is possible to obtain substantially the same operational effects as in the first embodiment.

On the other hand, in this embodiment, the outer portion 23 of the side sill 5 can be prevented from being crushed and deformed, and the reinforcing effect can be further enhanced.

The ribs or bulkheads 41a to 41e are used.
The reinforcing effect due to can be adjusted by increasing or decreasing the number in addition to setting the height or the thickness, and the strength adjusting portion is provided by adjusting at least one of the height, the thickness, the number, the shape, and the arrangement. Can be configured. Moreover, by such adjustment, the strength adjusting unit can be properly set.

FIG. 13 relates to a modified example of this embodiment, in which the ribs or bulkheads 43a, 43b, 43c, 43d have the same shape and the same thickness, and the lower end of the center pillar 21 from the center of the floor main body 3 in the longitudinal direction of the vehicle body. It is arranged partially to the front of the portion 21a so that the interval gradually increases.

Therefore, also in this embodiment, it is possible to obtain substantially the same operational effects as those of the above embodiment. Further, it becomes easier to control the crush mode of the outer portion 23 of the side sill 5 in more detail. Further, the reinforcement effect of the outer portion 23 and the adjustment of the collision reaction force are adjusted by the rib or the bulkhead 43a,
This can be properly performed by adjusting at least one of the shape, number, arrangement, height, and thickness of 43b, 43c, 43d.

(Fourth Embodiment) FIG. 14 is a perspective view of a main portion according to the fourth embodiment. The components corresponding to those of the first embodiment will be described with the same reference numerals, and duplicate description will be omitted.

In this embodiment, the reinforcing member 45 is joined to the outer surface 19a of the inner portion 19 of the side sill 5 to form a strength adjusting portion. The reinforcing member 45 is provided on the side portion of the floor body 3.

Further, the reinforcing member 45 is formed of a plate material, and the groove portions 47a, 47 are arranged so that the distance between them gradually becomes narrower toward the rear.
b and 47c. Therefore, the center pillar 21
The strength of the floor main body 3 on the center side in the vehicle body front-rear direction can be increased more than the strength on the lower end portion 21a side, and substantially the same operational effect as that of the first embodiment can be achieved.

On the other hand, the present embodiment can be applied even when the outer portion 23 of the side sill 5 cannot be reinforced.

15, 16, and 17 relate to a modification of this embodiment, in which reinforcing members 49, 51, and 53 are provided on the inner side surface 19b of the inner portion 19 of the side sill 5.
The reinforcing members 49, 51, 53 are partially provided from the center of the floor body 3 in the front-rear direction of the vehicle body to slightly in front of the lower end portion 21a of the center pillar 21, and the reinforcing members 49 have beads 55a, 55b, 55c, 55d is provided, the reinforcing member 51 is provided with holes 57a, 57b, 57c, and the reinforcing member 53 is provided with grooves 59a, 59b, 59c.

Beads 55a to 55d of the reinforcing material 49, holes 57a to 57c of the reinforcing material 51, and grooves 59a to 5 of the reinforcing material 53.
9c are arranged so that the distance between them is gradually narrowed rearward.

Therefore, the reinforcing members 49, 51 and 53 of FIGS. 15, 16 and 17 increase the strength of the floor body 3 on the center side in the vehicle front-rear direction rather than on the lower end 21a side of the center pillar 21. The collision reaction force can be adjusted, and in the examples of FIG. 15, FIG. 16 and FIG. 17, substantially the same operational effect as in FIG. 14 can be obtained.

On the other hand, in the examples of FIGS. 15, 16 and 17,
Outer surface 23a of outer part 23 or inner part 19
It can be applied even if it cannot be reinforced.

(Fifth Embodiment) FIGS. 18A and 18B relate to a fifth embodiment of the present invention. FIG. 18A is an overall perspective view, and FIG. The components corresponding to those of the first embodiment will be described with the same reference numerals, and duplicate description will be omitted.

On the other hand, in this embodiment, the seat mounting member 61, which is a component mounting member, is provided on the inner side surface 19b of the inner portion 19 of the side sill 5. The seat mounting member 61 is set in a range from the center of the floor main body 3 in the vehicle front-rear direction to a position slightly forward of the lower end portion 21a of the center pillar 21.

The seat mounting member 61 is made of a light metal extruded material,
It is made of a cast material or a plate member. The seat mounting member 61 has a channel material in cross section, as shown in FIG.
A seat side rail member 63 (not shown) is slidably supported as shown in FIG.

The rail member 63 is fitted to the seat mounting member 61 on the front side, does not reach the rear end side, and is not fitted. Therefore, the seat mounting member 6
1 and the rail member 63 are provided with a strength adjusting portion for increasing the strength of the floor body 3 on the center side in the vehicle body front-rear direction than the strength of the center pillar 21 on the lower end 21a side.
It is possible to adjust the collision reaction force, and it is possible to obtain substantially the same operational effect as in the first embodiment also in the present embodiment.

On the other hand, in this embodiment, it is possible to add the function of attaching other components to the floor side by utilizing the strength adjusting portion.

In each of the above embodiments, the strength adjusting portion adjusts the collision reaction force such that the strength of the center of the floor body 3 in the front-rear direction of the vehicle body is increased more than the strength of the lower end 21a of the center pillar 21. However, by adjusting the collision reaction force so that the strength of the floor pillar 3 on the lower end portion 21a side of the center pillar 21 is less than the strength on the center side in the vehicle front-rear direction, the same effect can be achieved. You can

[Brief description of drawings]

FIG. 1 is an overall exploded perspective view according to a first embodiment of the present invention.

FIG. 2 is a partially omitted perspective view of an assembled state according to the first embodiment.

3 is a sectional view taken along the line III-III of FIG.

FIG. 4 is a cutaway perspective view of relevant parts according to the first embodiment.

FIG. 5 is a schematic cross-sectional view of a main part showing a situation before a side collision.

FIG. 6 is a schematic cross-sectional view of essential parts showing a situation after a side collision.

7A to 7C are explanatory diagrams of a pillar lower approach amount, FIG. 7B is a floor reaction force characteristic, and FIG. 7C is a sill generation moment.

FIG. 8 is a graph showing a relationship between a pillar generated moment and a pillar lower approach amount.

FIG. 9 is a perspective view of a main part according to the second embodiment.

10 is a cross-sectional view taken along the line XX of FIG.

FIG. 11 is a perspective view of a main part according to a modified example of the second embodiment.

FIG. 12 is a perspective view of a main part according to a third embodiment.

FIG. 13 is a perspective view of a main part according to a modified example of the third embodiment.

FIG. 14 is a perspective view of a main part according to the fourth embodiment.

FIG. 15 is a perspective view of a main part according to a modified example of the fourth embodiment.

FIG. 16 is a perspective view of a main part according to a modified example of the fourth embodiment.

FIG. 17 is a perspective view of a main part according to a modified example of the fourth embodiment.

FIG. 18 relates to the fifth embodiment, (a) is a perspective view showing an arrangement of a strength adjusting part, and (b) is an enlarged perspective view of a main part.

FIG. 19 is a perspective view of a conventional example.

[Explanation of symbols] 1 Floor structure 3 Floor body 5 Side sill 11 Dash cross member 13 Rear cross member 19 Side sill inner part 21 Center pillar 21a Lower end 23 Side sill outer part 29 Strength adjustment parts 39a, 39b Reinforcement plate (strength adjustment Part) 41a, 41b, 41c, 41d, 41e rib or bulkhead (strength adjusting part) 43, 43b, 43c, 43d rib or bulkhead (strength adjusting part) 45, 49, 51, 53 reinforcement (strength adjusting part) 47a, 47b, 47c Grooves 55a, 55b, 55c, 55d Beads 57a, 57b, 57c Holes 59a, 59b, 59c Groove 61 Seat mounting member (strength adjusting part) 63 Rail member (part, strength adjusting part)

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62D 25/20

Claims (12)

(57) [Claims] 1. A dash cross member, which is a skeleton member, is connected to a front end of a floor main body formed in a substantially uniform cross section in the vehicle front-rear direction, and a rear cross member, which is a skeleton member, is attached to a rear end of the floor main body. comprising a floor structure bound, the service idosyl formed on the side of the floor structure, the rear end of the vehicle body front-rear direction center and the floor body of the floor body
The lower end of the pillar is connected in between, and at least one of the side portion or side sill of the floor body
, The center of the floor body in the front-rear direction of the vehicle and below the pillars.
Between the end portion, a strength adjusting portion that relatively reduces the collision reaction force generated at the lower end portion side of the pillar during a vehicle side collision relative to the collision reaction force generated at the vehicle body front-rear direction center side of the floor body. A vehicle body structure characterized by being provided. 2. The vehicle body structure according to claim 1, wherein the strength adjustment portion reduces the strength of the lower end portion of the pillar from the strength of the floor body in the vehicle front-rear direction center side. Body structure. 3. The vehicle body structure according to claim 1, wherein the strength adjusting portion increases the strength of the floor main body in the vehicle front-rear direction center side more than the strength of the lower end side of the pillar. Body structure. 4. The vehicle body structure according to claim 1, wherein the floor main body is formed of a light metal extruded material whose extrusion direction is the vehicle front-rear direction. . 5. The vehicle body structure according to claim 4, wherein an inner portion of the side sill is integrally formed on a side portion of the floor body, and an outer portion and a pillar of the side sill are formed of a light metal casting material. Car body structure characterized by being done. 6. The vehicle body structure according to claim 1, wherein the strength adjusting portion is provided by forming the side sill of a light metal casting material to partially thicken the side sill. Body structure characterized by that. 7. The vehicle body structure according to claim 1, wherein the strength adjusting unit sets a reinforcing plate on the side sill,
A vehicle body structure provided by adjusting at least one of a hole, a plate thickness and a strength of the reinforcing plate. 8. The vehicle body structure according to claim 1, wherein the strength adjusting portion is provided with a rib on the side sill, and at least the shape, number, arrangement, height, and thickness of the rib are set. A vehicle body structure characterized by being installed by one adjustment. 9. The vehicle body structure according to any one of claims 1 to 3, wherein the strength adjusting unit forms the side sill with a plate material and sets a bulkhead therein, and the shape of the bulkhead includes:
A vehicle body structure characterized by being provided by adjusting at least one of the number, arrangement, height and thickness. 10. The vehicle body structure according to claim 1, wherein the strength adjusting portion has at least one of a crushed bead, a hole, and a groove portion on a side portion of the floor body. A vehicle body structure characterized by being provided by coupling. 11. The vehicle body structure according to any one of claims 1 to 3, wherein the strength adjusting unit connects a component mounting member for mounting a component to the floor body or the side sill, and the component mounting member and the component mounting member. A vehicle body structure characterized by being formed by parts to be attached. 12. The vehicle body structure according to claim 11, wherein the component mounting member is formed of any one of a light metal extruded material, a cast material, and a plate member.