JP2007168700A - Body side structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the deformation of a lower part of a center pillar at the time of a side collision without suppressing the strength of the center pillar itself, and to suppress the pressure in a vehicle interior space.
A rocker 10 in a vehicle body side structure according to the present invention is formed into a hollow closed cross-section by a rocker outer 12 and a rocker inner 14, and a center pillar 30 includes an outer rein hose 35 and an inner rein hose 33. In the center pillar support portion 10s of the rocker 10, the outer rein hose 35 of the center pillar 30 is fixed to the rocker outer 12, and the inner rein hose 33 is connected to the rocker outer 12 and the rocker inner 14. In the space formed by the inner hose 33 of the center pillar 30 and the rocker inner 14 of the rocker 10, a space is provided at a position on the extension line of the cross member 20. A reinforcing material 17 to be filled is arranged.
[Selection] Figure 3

Description

  The present invention relates to a vehicle body side structure in a vehicle body having a structure in which a lower end portion of a center pillar is supported by a rocker extending in the front-rear direction of the vehicle, and a center pillar support portion of the rocker is supported by a cross member from the inner side in the vehicle width direction.

Regarding the vehicle body side structure, various proposals have been made from the viewpoint of occupant protection during a side collision.
As shown in the perspective view of FIG. 6A and the plan view of FIG. 6B, the vehicle body side part structure described in Patent Document 1 is reinforced between the rocker outer 101 and the rocker inner 102 constituting the rocker 100. Part 104 is provided. As shown in FIG. 6B, the reinforcing portion 104 includes a center pillar rein hose 105 fixed via bulkheads 105a and 105b substantially at the center in the front-rear direction of the reinforcing plate 104s, and the front and rear of the center pillar rein hose 105. A side rein hose 104r fixed to the reinforcing plate 104s is provided on both sides. The center pillar 107 is fixed to the center pillar rein hose 105 of the reinforcing portion 104, and the lower end portion of the center pillar 107 is fixed to the rocker outer 101.
Here, the end surface 104e of the side rein hose 104r is formed at a right angle to the reinforcing plate 104s, and the bulkheads 105a and 105b are formed in a slightly inclined state with respect to the reinforcing plate 104s. Therefore, a wedge-shaped gap is formed between the end surface 104e of the side rein hose 104r and the bulkheads 105a and 105b as shown in FIG. 6B.
For this reason, when the collision load F at the time of a side collision is applied from the center pillar 107 and the rocker outer 101 to the center pillar rein hose 105 of the reinforcing portion 104, the reinforcing portion 104 is connected to the side rein hose 104r as shown in FIG. Is bent to the inside of the vehicle body at the position of the gap between the end face 104e and the bulkheads 105a and 105b. Thereby, the collision load F at the time of a side collision comes to be absorbed.

JP-A-10-244970

However, in the vehicle body side structure described above, since the reinforcing portion 104 is bent to the inside of the vehicle body at the time of a side collision, the rocker 100 and the reinforcing portion 104 sufficiently support the center pillar 107 from the inner side in the vehicle width direction. The lower part of the center pillar 107 is easily deformed inward in the vehicle width direction. That is, the amount of intrusion increases at the lower part of the center pillar at the time of a side collision, and the vehicle interior space may be compressed.
The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is to reduce the amount of intrusion at the lower part of the center pillar at the time of a side collision, and the vehicle interior space is compressed. Is to suppress this.

The above-described problems are solved by the inventions of the claims.
According to the first aspect of the present invention, a vehicle body side portion in a vehicle body having a structure in which the lower end portion of the center pillar is supported by a rocker extending in the longitudinal direction of the vehicle and the center pillar support portion of the rocker is supported by a cross member from the inner side in the vehicle width direction The rocker is formed in a hollow closed cross-sectional shape by a rocker outer and a rocker inner, and the center pillar is formed in a hollow closed cross-sectional shape by an outer rein hose and an inner rein hose, The center pillar support portion of the rocker is configured such that the outer rein hose of the center pillar is fixed to the rocker outer and the inner rein hose is sandwiched and fixed between the rocker outer and the rocker inner. Composed of pillar inner hose and rocker inner In is the space, a position on an extension line of the cross member, wherein the reinforcing member is arranged so as to fill the space.

  According to the present invention, the reinforcing material is arranged in the space formed by the inner pillar hose of the center pillar and the rocker inner of the rocker so as to fill the space at a position on the extended line of the cross member. For this reason, when a collision load at the time of a side collision is applied to the center pillar, the collision load is applied to the cross member from the outer inner hose to the cross member via the rocker outer, the inner rear hose, the reinforcing material, and the rocker inner at the lower part of the center pillar. become. That is, since the reinforcing material is in the space between the inner hose of the center pillar and the rocker inner of the rocker, the center pillar support portion of the rocker is not easily crushed in the vehicle width direction. Thereby, the lower part of a center pillar is favorably supported from the vehicle width direction inner side by the center pillar support part of a rocker. For this reason, without increasing the strength of the center pillar itself, it is possible to reduce the intrusion amount of the lower part of the center pillar at the time of a side collision, and to suppress the pressure in the vehicle interior space.

According to the second aspect of the present invention, the rocker outer is characterized in that irregularities are formed at a position on the extension line of the cross member so as to increase the rigidity of the rocker outer in the vehicle width direction.
For this reason, the rocker outer is not easily crushed at the time of a side collision, and the intrusion amount in the vehicle width direction of the center pillar support portion of the rocker is reduced. Further, even if the rigidity of the rocker outer is increased, the weight of the rocker outer does not increase.
According to the invention of claim 3, the reinforcing material is a plate material formed by bending so that the cross-sectional shape is a groove shape, and the hollow closed cross-sectional shape is formed by the reinforcing material and the inner pillar hose of the center pillar. As described above, the reinforcing member is fixed to the inner hose.

According to the invention of claim 4, a pair of upper and lower shoulder brackets for supporting the seat belt is provided on the upper part of the inner rein hose constituting the center pillar, and a door is provided at the approximate center of the inner rein hose. A central reinforcing portion for receiving a collision load from the front of the vehicle applied to the center pillar is provided, and the lower shoulder bracket and the central reinforcing portion are formed at one end and the other end of the plate-like member. It is characterized by being.
Thus, since the lower shoulder bracket and the central reinforcing portion are formed at one end and the other end of the plate-like member, the lower shoulder bracket and the central reinforcing portion are integrated. Therefore, compared to the case where the lower shoulder bracket and the central reinforcing portion are separated from each other, the inner pillar hose of the center pillar to which the plate-like member is fixed causes the shoulder bracket and the central reinforcing portion to It becomes difficult to bend between. That is, due to the action of the plate member of the inner rein hose, the intrusion amount and the intrusion speed of the shoulder bracket of the center pillar and the central reinforcing portion are reduced at the time of a side collision. Accordingly, it is possible to further promote the reduction of the passenger's secondary collision speed.

  According to the present invention, the amount of intrusion at the lower part of the center pillar at the time of a side collision can be reduced, and the pressure in the vehicle interior space at the time of a side collision can be suppressed. Further, since the amount of intrusion and the intrusion speed of the center pillar can be expected, the passenger protection performance can be further improved.

[Embodiment 1]
Hereinafter, the vehicle body side part structure according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 5. Here, FIG. 1 (A) is a schematic plan view of the vehicle, and FIG. 1 (B) is a BB arrow view of FIG. 2 is an enlarged perspective view of a portion II in FIG. 1B, FIG. 3A is a sectional view taken along the line IIIA-IIIA in FIG. 2, and FIG. 3B is a sectional view taken along the line BB in FIG. It is. 4 and 5 are exploded side views of the center pillar.
In addition, front and rear, right and left and up and down in the figure correspond to front and rear, right and left and up and down of the vehicle.

<About the outline of the vehicle body side structure>
As shown in FIGS. 1 (A) and 1 (B), rockers 10 extending in the front-rear direction are provided on both sides in the width direction (left and right ends) of the floor portion of the vehicle body BD. A plurality of cross members 20 extending in the direction are passed. In FIG. 1A, only the cross member 20 at a substantially central position in the front-rear direction of the vehicle body BD is shown, and the others are omitted. Further, a center pillar 30 is erected outside the connecting portion between the rocker 10 and the cross member 20 at a substantially central position in the front-rear direction of the vehicle body BD, and the roof side rail 5 is supported by the center pillar 30. Yes.
FIG. 2 is a perspective view of the joint state between the rocker 10 on the right side of the vehicle body and the lower portion of the center pillar 30 as viewed from the vehicle interior side, and the cross member 20 is not shown.

<Connection structure of center pillar, rocker, cross member>
Next, the structure of the connecting portion of the center pillar 30, the rocker 10, and the cross member 20 will be described with reference to FIGS. 2, 3A, and 3B.
The rocker 10 is formed in a hollow closed cross-section by welding a rocker outer 12 and a rocker inner 14 extending in the front-rear direction of the vehicle body BD at the flange portions 12f and 14f. In the center pillar support portion 10 s of the rocker 10, as shown in FIGS. 3A and 3B, the lower end portion of the inner hose 33 (described later) of the center pillar 30 is sandwiched between the rocker outer 12 and the rocker inner 14. The inner hose 33 is welded to the flange portions 12 f and 14 f of the rocker 10. Further, the lower end portion of an outer rein hose 35 (described later) of the center pillar 30 is welded to the rocker outer 12 while covering the rocker outer 12 as shown in FIG. Further, in the center pillar support portion 10 s of the rocker 10, a joining flange 25 formed at the end of the cross member 20 is welded to the vertical wall surface 14 w of the rocker inner 14.

Further, in the space S constituted by the rocker inner 14 and the inner hose 33 of the center pillar 30, at a position on the extension line of the cross member 20, as shown in FIGS. A bulk 17 that is a reinforcing material is disposed. The bulk 17 is a plate material that is bent so that the cross-sectional shape is a groove shape, and flange portions 17f are formed at positions corresponding to both end edges of the groove. The flange 17 f of the bulk 17 is welded to the inner hose 33 of the center pillar 30. That is, a hollow closed cross-section SC is formed by the bulk 17 and the inner rein hose 33 of the center pillar 30.
Further, as shown in FIG. 3B, a plurality of beads 12 b that are rectangular depressions that are long in the vehicle width direction are formed on the upper surface 12 u of the rocker outer 12 at a position on the extension line of the cross member 20.
Thus, the center pillar support portion 10 s of the rocker 10 is not easily crushed in the vehicle width direction by the action of the bead 12 b of the rocker outer 12 and the bulk 17 in the rocker inner 14.
That is, the bead 12b corresponds to the unevenness of the present invention.

<About the structure of the center pillar>
Next, the structure of the center pillar 30 will be described with reference to FIGS. 4 and 5.
The center pillar 30 is a support column positioned substantially at the center of the side surface of the vehicle body BD, and the above-described outer inner hose 35 and inner inner hose 33 are welded to each other by the flange portions 33f and 35f, thereby forming a hollow closed cross-sectional shape. Is formed.
As shown in FIGS. 4 (A) and 5, the inner hose 33 is formed so as to be gradually narrower from the bottom to the top. A lower expanded portion 33d and an upper expanded portion 33u are respectively formed. Then, the lower expanded portion 33d of the inner rein hose 33 is sandwiched and fixed between the rocker outer 12 and the rocker inner 14 as described above. Moreover, the upper side expansion part 33u of the inner rein hose 33 is fixed inside the roof side rail 5 (refer FIG. 1 (B)).
As shown in FIG. 5, a pair of upper and lower shoulder brackets 41 and 42 to which seat belt support brackets (not shown) are attached are fixed to the upper portion of the inner rein hose 33, as shown in FIG. 5. Yes. Further, a collision load when the vehicle collides forward is received below the lower shoulder bracket 42 at a substantially central position in the vertical direction of the inner hose 33, that is, at a position of a belt line (a virtual line passing through the upper end of the door panel). A central reinforcing member 43 is fixed.

However, as shown in FIG. 5, if the lower shoulder bracket 42 and the central reinforcing member 43 are separated, the center pillar 30 sits between the shoulder bracket 42 and the central reinforcing member 43 at the time of a vehicle side collision. It becomes easy to bend.
In order to prevent this, in the vehicle body side part structure according to the present embodiment, as shown in FIG. 4A, the lower shoulder bracket 42 and the central reinforcing member 43 are connected to the upper end of one plate-like member 40. The lower shoulder bracket 42 and the central reinforcing member 43 (hereinafter referred to as the central reinforcing portion 43) are made continuous with each other.
Here, the reinforcement part in particular is not provided below the center reinforcement part 43 of the inner rein hose 33. However, since the width of the inner hose 33 gradually increases below the central reinforcing portion 43, the strength does not become insufficient even if no reinforcing portion is provided. An opening 33w formed in the lower portion of the inner rein hose 33 is a mounting hole for a seat belt retractor (not shown).

As shown in FIG. 4 (C), the outer rein hose 35 is formed so as to be gradually narrower from the bottom to the top in the same manner as the inner rein hose 33, and the lower end 35d of the outer rein hose 35 is The rocker outer 12 is configured to be covered. The upper end of the outer hose 35 is provided with a substantially L-shaped bent portion 35u, and the bent portion 35u is fixed to the outside of the roof side rail 5 (see FIG. 1B).
FIG. 4B shows a belt line rein hose 48 that is sandwiched between the outer rein hose 35 and the inner rein hose 33 and reinforces mainly the center portion of the center pillar 30.
As shown in FIG. 4D, the outer rein hose 35 is overlapped on the inner rein hose 33 in a state where the belt line rein hose 48 is overlapped. Then, the inner rein hose 33, the belt line rein hose 48, and the outer rein hose 35 are fixed to each other by welding or the like, so that the center pillar 30 is configured.
FIG. 4D shows a cross-sectional view of the center pillar 30 at a substantially center position in the vertical direction (position of the belt line).

<Advantages of the vehicle body side structure according to this embodiment>
As described above, according to the vehicle body side part structure according to the present embodiment, in the space S formed by the inner hose 33 of the center pillar 30 and the rocker inner 14 of the rocker 10, as shown in FIG. A bulk 17 is arranged at a position on the extended line of the cross member 20 so as to fill the space S. For this reason, when a collision load at the time of a side collision is applied to the center pillar 30, the collision load is transferred from the outer inner hose 35 through the rocker outer 12, the inner inner hose 33, the bulk 17, and the rocker inner 14 at the lower part of the center pillar 30. The cross member 20 is joined. That is, since the bulk 17 is in the space S between the inner hose 33 of the center pillar 30 and the rocker inner 14 of the rocker 10, the center pillar support portion 10s of the rocker 10 is not easily crushed in the vehicle width direction. Thereby, the lower part of the center pillar 30 is favorably supported from the inner side in the vehicle width direction by the center pillar support portion 10 s of the rocker 10. For this reason, the intrusion amount of the lower part of the center pillar 30 at the time of a side collision can be made small, and it can suppress efficiently that a vehicle interior space is compressed.

Further, as shown in FIG. 3B, a bead 12 b is formed in the rocker outer 14 at a position on the extension line of the cross member 20 so as to increase the compression rigidity of the rocker outer 14 in the vehicle width direction. For this reason, the rocker outer 14 is not easily crushed at the time of a side collision, and the strength of the center pillar support portion 10s of the rocker 10 in the vehicle width direction is further increased. Furthermore, even if the rigidity of the rocker outer 14 is increased, the weight of the rocker outer 14 does not increase.
In addition, at the upper part of the inner rein hose 33 constituting the center pillar 30, as shown in FIG. 4A, the lower shoulder bracket 42 and the central reinforcing portion 43 are connected to the upper end of one plate-like member 40. Formed and integrated with the lower end. Therefore, compared to the case where the lower shoulder bracket 42 and the central reinforcing portion 43 are separated (see FIG. 5), the inner rein hose 33 of the center pillar 30 to which the plate-like member 40 is fixed is the side surface. It becomes difficult to bend between the shoulder bracket 42 and the central reinforcing portion 43 at the time of collision. That is, when the center pillar 30 functions as the plate-like member 40 of the inner hose 33, the intrusion amount and the intrusion speed of the shoulder bracket 42 and the central reinforcing portion 43 are reduced at the time of a side collision. Accordingly, it is possible to further promote the reduction of the passenger's secondary collision speed.

<Example of vehicle body side structure change>
In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in the present embodiment, an example in which the bulk 17 is disposed only in the space S configured by the inner hose 33 of the center pillar 30 and the rocker inner 14 of the rocker 10 has been shown. It is possible to arrange the bulk 17 in a space constituted by the rocker 33 and the rocker outer 12 of the rocker 10.
Moreover, although the example which forms the bead 12b only in the upper surface 12u of the rocker outer 12 was shown, in addition to this, a bead can also be formed in the upper surface of the rocker inner 14. FIG. Furthermore, the number of beads 12b formed on the upper surface 12u of the rocker outer 12 and the shape thereof can be changed as appropriate. For example, the bead 12b can be formed in a convex shape, a concave shape, or a wave shape.
Moreover, although the plate-shaped member 40 which comprises the lower shoulder bracket 42 and the center reinforcement part 43 was formed by one member, the member on the shoulder bracket side and the member on the center reinforcement part side were shown. It is also possible to form them separately and weld them together.

It is a schematic plan view (A figure) of a vehicle provided with the vehicle body side part structure which concerns on Embodiment 1 of this invention, and the BB arrow line view (B figure) of A figure. It is an expansion perspective view of the II section of Drawing 1 (B). It is the IIIA-IIIA arrow sectional view (A figure) of FIG. 2, and the BB arrow figure (B figure) of A figure. It is an exploded side view (A figure, B figure, C figure) of a center pillar, and a transverse cross section (D figure) of a center pillar. It is a side view of an inner hose of a center pillar. It is a disassembled perspective view (A figure) showing the conventional vehicle body side part structure, and a top view (B figure, C figure) of a reinforcement part.

Explanation of symbols

10 Rocker 12 Rocker outer 12b Bead (Unevenness)
14 Rocker Inner 17 Bulk (reinforcing material)
20 Cross member 30 Center pillar 33 Inner rein hose 35 Outer rein hose 40 Plate-like member 41 Shoulder bracket 42 Shoulder bracket 43 Central reinforcing material (central reinforcing part)

Claims (4)

A vehicle body side part structure in a vehicle body configured such that a lower end portion of the center pillar is supported by a rocker extending in the front-rear direction of the vehicle, and the center pillar support portion of the rocker is supported by a cross member from the inside in the vehicle width direction,
The rocker is formed in a hollow closed cross-sectional shape by a rocker outer and a rocker inner,
The center pillar is formed in a hollow closed cross-section by an outer hose and an inner hose,
In the center pillar support portion of the rocker, the outer pillar hose of the center pillar is fixed to the rocker outer, and the inner liner hose is sandwiched and fixed between the rocker outer and the rocker inner.
In the space constituted by the inner pillar hose of the center pillar and the rocker inner of the rocker, a reinforcing material is arranged at a position on the extension line of the cross member so as to fill the space. Car body side structure. The vehicle body side structure according to claim 1,
A vehicle body side structure, wherein the rocker outer is formed with irregularities at a position on an extension line of the cross member so as to increase the rigidity of the rocker outer in the vehicle width direction. The vehicle body side structure according to claim 1 or 2,
The reinforcing material is a plate formed by bending so that the cross-sectional shape is a groove shape, and the reinforcing material is formed such that a hollow closed cross-sectional shape is formed by the reinforcing material and the inner pillar hose of the center pillar. A vehicle body side portion structure fixed to the inner hose. The vehicle body side part structure according to any one of claims 1 to 3,
A pair of upper and lower shoulder brackets that support the seat belt are provided on the upper part of the inner hose constituting the center pillar.
A central reinforcing portion that receives a collision load from the front of the vehicle that is applied to the center pillar via a door is provided in the approximate center of the inner hose,
The vehicle body side part structure characterized in that the lower shoulder bracket and the central reinforcing portion are formed at one end and the other end of a plate-like member.

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