JP2000159148A - Lower part car body structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To intend the improvement of occupant safety by reducing the intrusion of a pillar and a side sill vicinity part (body on the side of an occupant) into a car interior against a load from the side part of a vehicle. SOLUTION: This car body structure arranges a side sill 6 in one side part of a floor panel 5 arranging a seat 4 of a vehicle and a tunnel part 10 and a pillar 11 in the other side part. In this case, a cross member 19 is provided which connects the vicinity of a base end part of the pillar 11 of the side sill 6 and the tunnel part 10. A mounting part in a side of the side sill 6 of the cross member 19 and a base end part in a side of the side sill 6 of the pillar 11 are offset in the longitudinal direction of the vehicle so that the parts are connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel in which a side sill as a strength member is arranged on one side of a floor panel on which a vehicle seat is arranged, and a tunnel extending in the front-rear direction at the center of the vehicle on the other side. The present invention relates to a lower body structure of an automobile in which a portion is provided and a pillar extending upward from the side sill is provided as a base end.

[0002]

2. Description of the Related Art Conventionally, there is a structure as shown in FIG.

A side sill 9 as a strength member is provided on one side of a floor panel 91 on which a vehicle seat is disposed.
2 (however, only the side sill inner is shown in FIG. 17 for convenience of illustration) facing the vehicle front-rear direction, and a tunnel portion 93 extending in the front-rear direction at the center of the vehicle is disposed on the other side. This is a lower vehicle body structure of an automobile in which pillars 94 (specifically, center pillars) extending upward from side sills 92 are provided. Note that F in the figure indicates the front of the vehicle.

In this conventional structure, when a load X is input from the side of the vehicle at the time of a side collision of the vehicle as shown in FIG.
There is a problem that the pillar 94 is broken, and the base end 94a of the pillar 94 and the side sill inner on the seat side largely enter the vehicle interior.

In order to solve such a problem, conventionally,
JP-A-57-45441 and JP-A-3-384.
A lower body structure of an automobile as described in Japanese Patent Publication No. 74 has already been invented. In other words, the former actual practice 57-4544
In the vehicle disclosed in Japanese Patent Publication No. 1 (1993), a cross member extending in the vehicle width direction is stretched between a side sill and a tunnel portion corresponding to a lower surface position of a rear end of a seat cushion in a vehicle seat to secure a foot space. For the purpose, a concave portion is formed in the above-mentioned cross member, and a clearance for foot insertion is provided between the upper surface of the floor panel and the lower surface of the concave portion of the cross member.

Although the above publication does not disclose the relative positional relationship between the above-mentioned cross member and the pillar, since the pillar base end generally corresponds to the seat cushion rear end, the above-mentioned cross member is connected to the seat cushion rear end. When the vehicle is stretched in accordance with the position of the lower surface of the vehicle, the foot space of the rear occupant is obstructed, and special means for forming the recess as described above is required.

Moreover, in the conventional structure, there is a problem that it is not possible to sufficiently reduce the approach of the side sill near the seat (the body on the side of the occupant) into the vehicle interior.

On the other hand, the latter disclosed in JP-A-3-38474 is a cross member extending in the vehicle width direction between rails of a vehicle seat on a lower surface of a seat cushion for the purpose of enhancing occupant safety performance against a side collision. (Reinforcing member)
By stretching the seat and improving the rigidity of the seat itself,
This is configured to prevent deformation in the width direction of the seat due to a side collision load.

However, in this configuration, the position of the above-mentioned cross member moves together with the sliding of the seat in the front-rear direction, so that the pillar is prevented from entering the passenger compartment, and the portion near the side sill of the seat side (the body near the occupant). ), It is difficult to sufficiently prevent the vehicle from entering the vehicle interior.

[0010]

According to the first aspect of the present invention, there is provided a cross member for connecting between a vicinity of a pillar base end of a side sill and a tunnel portion, and a mounting portion of the cross member on the side sill side. By offsetting in the longitudinal direction of the vehicle between the vehicle and the base end of the pillar on the side sill side, the approach of the load from the side of the vehicle and the approach of the pillar into the cabin and the vicinity of the side sill on the seat side Part (body on the side of the occupant) into the cabin,
It is an object of the present invention to provide a lower body structure of an automobile capable of improving occupant safety.

According to a second aspect of the present invention, in addition to the object of the first aspect of the present invention, it is preferable that the mounting portion of the cross member on the side sill side and the base end of the above-mentioned pillar on the side sill side are provided. Attaching reinforcing members that transmit the load of both parts between them improves vehicle body rigidity against side collisions and further reduces the amount of pillars and seats entering the vehicle interior near the side sill at the side collision. It is an object of the present invention to provide a lower body structure of an automobile capable of being driven.

According to a third aspect of the present invention, in addition to the object of the second aspect, a sheet is provided in the vicinity of the pillar, and the reinforcing member is set on a bracket for attaching the sheet. It is another object of the present invention to provide a lower vehicle body structure of an automobile which does not hinder comfort even if the reinforcing member is provided.

According to a fourth aspect of the present invention, in addition to the object of the first aspect of the present invention, by providing the above-mentioned cross member to be spaced downward from the upper surface of the floor panel, it is possible to provide a rear seat occupant with the cross member. It is an object of the present invention to provide a lower body structure of an automobile capable of securing a foot space.

According to a fifth aspect of the present invention, in addition to the object of the first aspect, the cross member is concealed and arranged at a lower portion of the seat, so that the cross member can be visually checked. It is an object of the present invention to provide a lower vehicle body structure of an automobile which can improve the appearance by disabling the vehicle.

According to a sixth aspect of the present invention, in addition to the object of the first aspect, the cross member is disposed to be spaced downward from the lower surface of the seat. To provide a lower body structure of an automobile which can always be held in a proper position.

According to a seventh aspect of the present invention, in addition to the object of the second aspect, the reinforcing member is formed by integrally forming the cross member mounting bracket and the seat mounting bracket. It is another object of the present invention to provide a lower vehicle body structure of an automobile capable of reducing the number of parts and the number of mounting steps.

According to an eighth aspect of the present invention, in addition to the object of the first aspect, the cross member is configured to be attached by bolt-up so that the cross member can be formed with a simple structure. It is an object of the present invention to provide a lower body structure of an automobile in which members can be retrofitted.

[0018]

According to the first aspect of the present invention, a side sill, which is a strength member, is disposed in one side of a floor panel on which a vehicle seat is disposed, in a longitudinal direction of the vehicle. A lower vehicle body structure of a vehicle, wherein a tunnel portion extending in the front-rear direction at a center portion of the vehicle is disposed at a side portion, and a pillar extending upward with the side sill as a lower end is disposed. A cross member is provided for connecting between the vicinity of the base end and the above-mentioned tunnel portion. A connection is provided between the mounting portion of the cross member on the side sill side and the base end of the pillar on the side sill side so as to be offset in the vehicle longitudinal direction. Characterized in that it is a lower body structure of an automobile.

According to a second aspect of the present invention, in addition to the configuration of the first aspect of the present invention, between the mounting portion of the cross member on the side sill side and the base end of the pillar on the side sill side. Is characterized in that it is a lower body structure of an automobile to which a reinforcing member for transmitting loads of both parts is attached.

According to a third aspect of the present invention, in addition to the configuration of the second aspect, a sheet is provided near the pillar, and the reinforcing member is set on a bracket for attaching the sheet. A lower vehicle body structure of an automobile.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the cross member has a lower body structure of an automobile provided to be spaced upward from an upper surface of a floor panel. There is a feature.

According to a fifth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the cross member has a lower body structure of a motor vehicle concealed under a seat. It is characterized by.

According to a sixth aspect of the present invention, in addition to the structure of the first aspect of the present invention, the cross member has a lower vehicle body structure of an automobile which is disposed to be spaced downward from a lower surface of a seat. There is a feature.

According to a seventh aspect of the present invention, in addition to the structure of the second aspect of the present invention, the reinforcing member is an automobile having a cross member mounting bracket and a seat mounting bracket integrally formed. It is characterized by a lower body structure.

According to an eighth aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the cross member has a lower vehicle body structure of an automobile mounted by bolt-up.

[0026]

According to the first aspect of the present invention, there is provided a cross member which connects between the vicinity of the pillar base end of the side sill as a strength member and the tunnel, and the side sill of the cross member is provided. Between the mounting portion on the side and the base end on the side sill side of the pillar in the vehicle front-rear direction. Both entry into the passenger compartment and entry into the passenger compartment of the side sill near the seat (a body such as a door on the side of the occupant) can be reduced, and occupant safety can be improved. effective.

According to the invention described in claim 2 of the present invention,
In addition to the effect of the first aspect of the present invention, a reinforcing member for transmitting loads of both parts is mounted between the mounting portion of the cross member on the side sill side and the base end of the pillar on the side sill side. Therefore, the rigidity of the vehicle body against side collisions can be improved by this reinforcing member, and the amount of entry into the vehicle interior near the side sills of the pillar and the seat side at the time of side collision can be further reduced. is there.

According to the third aspect of the present invention,
In addition to the effect of the second aspect of the present invention, a sheet is provided in the vicinity of the above-mentioned pillar, and the reinforcing member is set on the bracket for mounting the sheet. There is no effect.

According to the fourth aspect of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-mentioned cross member is provided to be separated upward from the upper surface of the floor panel, there is an effect that a foot space for a rear occupant can be secured.

According to the invention described in claim 5 of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-described cross member is arranged so as to be hidden under the seat, visual observation of the cross member is impossible, and the appearance can be improved. effective.

According to the invention described in claim 6 of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-mentioned cross member is disposed to be spaced downward from the lower surface of the sheet, the cross member does not move forward with the sheet, and of course, the cross member does not move forward. There is an effect that the member can be always stretched and held at an appropriate position.

According to the seventh aspect of the present invention,
In addition to the effect of the second aspect of the present invention, since the reinforcing member is formed by integrally forming the cross member mounting bracket and the seat mounting bracket, the number of parts and the number of mounting steps can be reduced. There is.

According to the invention described in claim 8 of the present invention,
In addition to the effect of the first aspect of the present invention, since the above-described cross member is configured to be attached by bolt-up, there is an effect that the cross member can be retrofitted with a simple structure.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The drawings show the lower body structure of an automobile. In FIGS. 1 to 5, a seat cushion 1 and a seat back 2 are shown.
, And a driver's side seat 4 having a headrest 3.

The lower body structure of the vehicle according to this embodiment is substantially bilaterally symmetrical between the right side where the driver's side seat 4 is provided and the left side where the passenger's side seat (not shown) is provided. However, for convenience of explanation, the structure on the side where the sheet 4 is provided will be described below.

A floor panel 5 on which the above-mentioned seat 4 is disposed is provided, and a projection 5a extending in the front-rear direction of the vehicle is formed on the right side of the floor panel 5, and a side sill 6 is joined to the projection 5a. Fixed.

The side sill 6 is a strength member having a closed cross section 9 extending in the front-rear direction of the vehicle by joining the side sill inner panel 7 and the side sill outer panel 8 together.
On the other side, that is, the left side, of the floor panel 5 on which the above-mentioned seat 4 is disposed, a tunnel portion 10 extending in the front-rear direction at the center of the vehicle is integrally or integrally formed.

A pillar 11 (specifically, a center pillar) extending upward from the side sill 6 to the roof with the side sill 6 as a base is provided at a position facing the seat back 2 in the seat 4 described above.

The pillar 11 is a strength member having a closed cross section 14 extending in the vertical direction of the vehicle by joining the pillar inner panel 12 and the pillar outer panel 13 as shown in FIG.

On the other hand, at a position substantially corresponding to the front end of the seat cushion 1 of the seat 4, the cross member 15 (specifically, the cross section is directed to the floor panel 5 in the vehicle width direction) has a cross section. No. 2 cross member) is joined and fixed, and front sheet mounting brackets 16 and 17 are joined and fixed to both left and right ends of the cross member 15, respectively.

Further, the side sill 6 of the pillar 11 described above is used.
Another cross member 18 (specifically, a No. 3 cross member) is stretched in the vehicle width direction between the left and right side sills 6 and 6 behind the base end 11a on the side.

A cross member 19 extending in the vehicle width direction between the vicinity of the pillar base end 11a of the side sill inner panel 7 and the above-mentioned tunnel portion 10 and connecting these two members 7 and 10 is provided. I have. The cross member 19 has a mounting portion 19a on the side sill 6 side (see FIGS. 6 and 7).
Is mounted at a position offset forward with respect to.

Between the mounting portion 19a of the cross member 19 on the side sill 6 side and the base end 11a of the pillar 11 on the side sill 6 side, a reinforcing member 20 for transmitting the load of both portions is mounted. ing.

As shown in FIGS. 1, 5, 6, and 7, the reinforcing member 20 has a substantially gate-like overall shape, and a cross member mounting bracket 21 and a sheet mounting bracket 22 are integrally formed. In this reinforcing member 20, a total of five joining pieces 23, 24, 25, 26, 27 are integrally formed, and the three joining pieces 23 to 25 on the side are joined to the side sill inner panel 7, and the lower The two joining pieces 26 and 27 are joined to the upper surface of the floor panel 5.

Here, the cross member mounting bracket 2
The top deck surface of each of the brackets 21 and 22 is formed in a stepped manner so that the seat mounting surface of the seat mounting bracket 22 is located above the cross member mounting surface by a predetermined amount. Mounting holes 28 are formed in the deck surface.

The above-described cross member mounting bracket 21
Another cross member mounting bracket 29 (see FIG. 2) is provided between the tunnel portion 10 and the floor panel 5 so as to face the same.

As shown in FIGS. 2 and 3, the cross member mounting bracket 29 has a total of five joint pieces 30, 31,.
32, 33, and 34, are formed in a substantially gate shape, three lateral joint pieces 30 to 32 are joined to the tunnel portion 10, and two lower joint pieces 33, 34 are attached to the upper surface of the floor panel 5. Are joined.

The cross member 19 described above is mounted between the top deck surfaces of the cross member mounting bracket 21 on the side sill 6 side and the cross member mounting bracket 29 on the tunnel section 10 by post-mounting means. ing.

FIGS. 6 and 7 show the cross member 19.
As shown in FIG. 6, a channel member having a rectangular frame-like cross section is used, but notches 19b and 19c are formed by notching the upper surface of the mounting portion for bolting up.

The above-described cross member mounting bracket 2
As shown in FIGS. 6 and 7, a nut 35 is welded and fixed to the lower surface of the top deck surface of each of the nuts 1 and 29, and the bolt 36 is screwed into the nut 35 by using the cutout portions 19b and 19c. By joining, the cross member 19 is stretched between the left and right cross member mounting brackets 21 and 29.

When the cross member 19 is stretched between the vicinity of the pillar base end 11a of the side sill 6 and the tunnel section 10 by such means, as shown in FIGS. 4 and 5, the cross member 19 is attached to the floor panel. 5 is provided above the upper surface of the seat 4 and the cross member 19 is
The cross member 19 is further concealed and disposed at a lower portion of the seat 4 and is spaced downward from the lower surface of the seat cushion 1 of the seat 4.

As shown in FIG. 8, the rear lower surface of the cross member 19 extends along its longitudinal direction as a slant surface 19d.
, Which is designed to further increase the foot space of the rear passenger.

In the figure, reference numeral 37 denotes a cross member 19,1.
8 is a seat mounting bracket mounted between the tunnel portion 10 and the floor panel 5 at the middle portion in the vehicle front-rear direction.

The illustrated embodiment is constructed as described above, and the operation will be described below. At the time of a side collision (side collision) of the vehicle, a collision load is input from the side of the vehicle. However, a cross member 19 that connects between the vicinity of the pillar base end 11a of the side sill 6 and the tunnel portion 10 is provided. Therefore, the cross member 19 acts in the direction of stretching against the side impact load, and the cross member 19 is not deformed, so that the pillar 11 and a part of the side sill 6 corresponding to the lower portion thereof are slightly inward as shown in FIG. As is clear from the comparison with the conventional structure in FIG. 18, the pillar 11 enters the vehicle interior and the vicinity of the side sill 6 corresponding to the side of the seat 1 (doors on the side of the occupant, etc.). Of the vehicle body) into the vehicle interior can be greatly reduced.

As described above, according to the embodiment shown in FIGS. 1 to 9, the pillar base end 1 of the side sill 6 as a strength member is provided.
A cross member 19 is provided for connecting between the vicinity of 1a and the tunnel portion 10. A cross member 19 is provided between the mounting portion 19a of the cross member 19 on the side sill 6 side and the base end 11a of the pillar 11 on the side sill 6 side in the vehicle longitudinal direction. Because of the offset, when the load enters from the side of the vehicle such as a side collision, the cross member 19 allows the pillar 11 to enter the vehicle interior, and the side of the seat 4 near the side sill 6 (occupant side). Of the door and the like into the vehicle interior, thereby improving occupant safety.

Further, between the mounting portion 19a of the cross member 19 on the side sill 6 side and the base end 11a of the pillar 11 on the side sill 6 side, a reinforcing member 20 for transmitting the load of both portions is mounted. Therefore, the rigidity of the vehicle body against a side collision can be improved by the reinforcing member 20, and the side sill 6 on the side of the pillar 11 and the seat 4 at the time of a side collision can be achieved.
There is an effect that the amount of entry into the vehicle compartment in the vicinity can be further reduced.

Further, since the sheet 4 is provided near the above-mentioned pillar 11 and the reinforcing member 20 is set to the bracket 22 for attaching the sheet, the presence of the reinforcing member 20 makes it possible to look good and hinder the livability. There is no effect.

In addition, since the above-described cross member 19 is provided above and separated from the upper surface of the floor panel 5, there is an effect that a space for the rear passenger can be secured by this gap.

Further, the above-mentioned cross member 19 is
The occupant cannot see the cross member 19 because it is concealed and disposed at the lower part of the vehicle, and the appearance can be improved.

On the other hand, the above-mentioned cross member 19 is
The cross member 19 is naturally not moved forward together with the seat 4 because the cross member 19 is disposed downwardly from the lower surface of the first member, and the cross member 19 can always be stretched and held at an appropriate position. There is.

Further, the above-mentioned reinforcing member 20 includes a cross member mounting bracket 21 and a seat mounting bracket 2.
Since the reinforcing member 20 is formed integrally with the reinforcing member 20, the reinforcing member 20 can be formed as a single member. As a result, the number of components and the number of mounting steps can be reduced.

In addition, since the above-described cross member 19 is configured to be attached by bolt-up, there is an effect that the cross member 19 can be retrofitted (that is, an add-on type) with a simple structure.

FIGS. 10 to 13 show another embodiment of the lower vehicle body structure of an automobile. Although the cross member 19 in the shape of a square pipe is used in the previous embodiment, the cross member 40 made of a round pipe is used in the embodiments of FIGS. For this reason, as shown in FIG.
1 and a bracket 43 integrally formed with an arc-shaped concave receiving portion 42 are provided. The lower left and right ends of the cross member 40 made of a round pipe are placed on the receiving portion 42 of the bracket 43 and fixed by welding. 40 and 43 are integrated.

The mounting seats 41 of the left and right brackets 43
Are formed with bolt insertion holes 44, while the bolt insertion holes 4 between the reinforcing member 20 and the cross member mounting bracket 29 are formed.
Nuts 47 are previously fixed to the lower surfaces of the top decks of these members 20 and 29 by welding, as shown in FIG.

The cross member 40 is mounted between the reinforcing member 20 and the cross member mounting bracket 29 by using the bolts 48 inserted into the bolt insertion holes 44, 45, 46, and the cross member 40 is mounted on the side sill. 6 is stretched in the vehicle width direction between the vicinity of the pillar base end portion 11a and the tunnel portion 10, and the mounting portion of the cross member 40 on the side sill side is the base end portion 11a on the side sill side of the pillar 11. Is offset to the front position of the vehicle.

Even with such a configuration, the above-described cross member 40 is provided to be spaced upward from the upper surface of the floor panel 5, and the cross member 40 is concealed and disposed below the seat 4. Reference numeral 40 denotes a lower portion of the seat 4 that is spaced from the lower surface.

Therefore, the embodiment shown in FIGS. 10 to 13 has almost the same operation and effect as the previous embodiment. Therefore, in FIGS. Therefore, the detailed description is omitted.

FIGS. 14 to 16 show still another embodiment of the lower body structure of an automobile. As shown in the drawing, in this embodiment, a cross member 50 made of a square pipe is provided, and L-shaped mounting members 51 are fixed to the front and rear surfaces of the left and right ends of the cross member 50 by welding. An approximately concave bracket 52 whose nut joint piece is separated from the tunnel portion 10 is welded and fixed to a predetermined portion.

The closed section 9 of the side sill inner panel 7
, The nut 53 is fixed by welding in advance, and the nut 54 is also fixed by welding to the nut joint piece of the bracket 52 in advance.

Thus, the cross member 50 in which the mounting members 51 are integrated is bolted up between the side sill inner panel 7 and the bracket 52 by using the bolts 55 for separating the nuts 53 and 54 from each other. Thus, the cross member 50 is stretched in the vehicle width direction between the vicinity of the pillar base end 11a of the side sill 6 and the tunnel portion 10, and the mounting portion of the cross member 50 on the side sill side is a pillar. 11 is offset to the vehicle forward position with respect to the base end 11a on the side sill side. In addition, 56 shown in FIG. 16 is a floor mat.

Even with such a structure, the above-described cross member 50 is provided to be separated from the upper surface of the floor panel 5 upward, and the cross member 50 is concealed and disposed below the seat 4. Reference numeral 50 is provided to be spaced downward from the lower surface of the sheet 4.

Therefore, the embodiment shown in FIGS. 14 to 16 has almost the same operation and effect as the previous embodiment. Therefore, in FIGS. 14 to 16, the same parts as those in the previous figures are denoted by the same reference numerals. Therefore, the detailed description is omitted.

In short, according to the present invention, the single cross members 19, 40, 50 are offset in the front-rear direction from the side sill side base end 11 a of the pillar 11, and the vicinity of the pillar base end of the side sill 6 and the tunnel portion Since the vehicle is stretched in the vehicle width direction between the vehicle and the vehicle, the cross members 19, 40, and 50 oppose each other when a side collision load is input, thereby reducing the penetration of the pillar 11 into the vehicle interior and the doors on the side of the occupant. This has the effect of achieving a reduction in the entry of the body into the vehicle interior and a significant improvement in occupant safety.

In the correspondence between the configuration of the present invention and the above-described embodiment, the seat of the present invention corresponds to the driver's side seat 4 of the embodiment, but the present invention is limited to the configuration of the above-described embodiment only. It is not limited.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a lower vehicle body structure of an automobile according to the present invention.

FIG. 2 is a perspective view of the lower vehicle body structure from different directions.

FIG. 3 is a plan view of a lower vehicle body structure.

FIG. 4 is a front view of a lower vehicle body structure.

FIG. 5 is a side view of the lower vehicle body structure.

FIG. 6 is an essential part cross-sectional view along the line AA in FIG. 3;

FIG. 7 is a sectional view taken along line BB of FIG. 4;

FIG. 8 is a cross-sectional view of a main part along line CC in FIG. 4;

FIG. 9 is an explanatory view at the time of a side collision.

FIG. 10 is an exploded perspective view showing another embodiment of the lower vehicle body structure of the automobile according to the present invention.

FIG. 11 is an exploded perspective view of the lower vehicle body structure from different directions.

FIG. 12 is a sectional view showing a mounting structure of the cross member.

FIG. 13 is a perspective view of a bracket.

FIG. 14 is a perspective view showing still another embodiment of the lower vehicle body structure of the automobile according to the present invention.

FIG. 15 is a perspective view of the lower vehicle body structure from different directions.

FIG. 16 is a sectional view taken along the line DD in FIG. 15;

FIG. 17 is a perspective view showing a lower vehicle body structure of a conventional automobile.

FIG. 18 is an explanatory view of a conventional structure at the time of a side collision.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 4 ... Seat 5 ... Floor panel 6 ... Side sill 10 ... Tunnel part 11 ... Pillar 11a ... Base end 19,40,50 ... Cross member 20 ... Reinforcement member 21 ... Cross member mounting bracket 22 ... Seat mounting bracket 36,48,55 …bolt

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshinori Sakamoto 3-1, Fuchi-machi, Shinchu, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Koji Nakao 3-1 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. F-term (reference) 3D003 AA01 AA04 AA11 AA14 BB02 CA14 CA15 CA17 CA18 CA34 DA19

Claims (8)

[Claims] 1. A side sill, which is a strength member, is provided on one side of a floor panel on which a vehicle seat is provided, and a tunnel portion extending in the front-rear direction on a center portion of the vehicle is provided on the other side. A lower body structure of an automobile, in which a pillar extending upward with the side sill as a lower base end is provided, wherein a cross connecting between a vicinity of a pillar base end of the side sill and the tunnel portion is provided. Members are provided,
A lower vehicle body structure of an automobile in which an attachment portion on a side sill side of the cross member and a base end on a side sill side of a pillar are connected to be offset in a vehicle front-rear direction. 2. A reinforcing member for transmitting loads at both portions is mounted between a mounting portion of the cross member on the side sill side and a base end of the pillar on the side sill side.
The lower body structure of the vehicle as described. 3. A lower vehicle body structure for an automobile according to claim 2, wherein a seat is provided near said pillar, and said reinforcing member is set on a bracket for mounting said seat. 4. The lower vehicle body structure of an automobile according to claim 1, wherein said cross member is provided to be spaced upward from an upper surface of the floor panel. 5. The lower body structure of an automobile according to claim 1, wherein said cross member is concealed and disposed at a lower portion of a seat. 6. The lower vehicle body structure of an automobile according to claim 1, wherein said cross member is disposed to be spaced downward from a lower surface of the seat. 7. The lower vehicle body structure according to claim 2, wherein said reinforcing member is formed by integrally forming a cross member mounting bracket and a seat mounting bracket. 8. The lower vehicle body structure according to claim 1, wherein said cross member is attached by bolt-up.