JP3736214B2 - Car body side structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle body side structure.
[0002]
[Prior art]
In recent vehicle body side structures, various technical developments have been made to improve the strength against side collisions and to enhance the protection performance of passengers during side collisions.
[0003]
On the other hand, in the door opening portion, there is a requirement that passengers must be able to get on and off, and there is a demand for achieving both of these passengers and side impact performance.
[0004]
Conventionally, as such a technique, as shown in FIGS. 5 and 6, for example, a side sill of the lower side of the door opening is changed in height at an intermediate portion (Japanese Patent Laid-Open No. 9-254825). See the official gazette).
[0005]
FIG. 5 shows the above-described conventional vehicle body side portion structure, wherein 1 is a center pillar located at the vehicle body side portion, and 2 is a side sill provided at the lower end of the center pillar 1 and extending in the vehicle body longitudinal direction. .
[0006]
As shown in FIG. 6, the side sill 2 includes a sill inner 2A and a sill outer 2B. The sill inner 2A includes a floor panel 4 constituting a floor surface of a passenger compartment and a pair of left and right side sills 2, 2. The floor cross member 5 constructed between the two is joined.
[0007]
Reference numeral 6 denotes a front door opening on the side of the vehicle body, and the lower side α of the front door opening 6a on the side of the vehicle body is formed by the upper end of the side sill 2.
[0008]
The upper end height of the side sill 2 constituting the lower side α of the front portion door opening 6a is configured to vary at the intermediate portion β vehicle longitudinal direction of said front door opening 6a.
[0009]
Specifically, an inclined portion 20 is formed in the intermediate portion β, and the upper end portion of the side sill 2 is a height that is the upper end portion of the inclined portion 20 and the side sill portion 21 on the rear side of the vehicle body from the inclined portion 20. The horizontal rear upper end 21a is relatively high, and the front upper end 22a is the upper end of the side sill portion 22 on the front side of the vehicle body from the inclined portion 20.
[0010]
[Problems to be solved by the invention]
However, according to the conventional structure, the height of the upper end of the side sill 2 is provided in the middle portion β of the front door opening 6a with the inclined portion 20 and is changed abruptly by the inclined portion 20 to form a stepped shape. Therefore, in order to form such a side sill 2, a drawing (drawing) process is required, and a pressing margin for pressing when the material is stretched is required in addition to the product portion, so that the material yield deteriorates. In addition, there is a problem that it is disadvantageous in terms of cost, such as an increase in molding cost.
[0011]
Further, since the change in the intermediate portion β (inclined portion 20) where the upper end height of the side sill 2 changes is rapid, wrinkles are likely to occur in the intermediate portion β when the sill inner 2A and the sill outer 2B of the side sill 2 are formed. , There was a problem that it looks bad.
[0012]
In addition, since stress concentrates on the intermediate portion β at the time of a frontal collision of the vehicle, it is necessary to provide additional reinforcing means such as a reinforcing brace 23 to counteract the impact at the time of the frontal collision.
[0013]
Therefore, the present invention achieves compatibility between boarding / exiting performance and side impact performance, increases the formability of the side sill, reduces costs, and can sufficiently withstand the impact at the time of frontal collision without requiring additional reinforcing means. A vehicle body side structure is provided.
[0014]
[Means for Solving the Problems]
According to the first aspect of the present invention, the center pillar includes a center pillar located on the side of the vehicle body and a side sill provided at the lower end of the center pillar and extending in the longitudinal direction of the vehicle body. Vehicle body side structure provided with a pillar reinforcement across the side sill, wherein the center pillar is disposed within a closed cross-section of the side sill that forms the lower side of the front door opening and the rear door opening on the side of the vehicle body. A reinforcement having an upper surface portion, a vertical wall portion, and a lower surface portion and having a substantially U-shaped cross section is provided, and the upper surface portion of the reinforcement is front-rear direction substantially in the form of a middle portion the center pillar arranged partial to slant in side view so that the vehicle body rear portion relatively and gradually increased toward the the lower parts door opening An inclined portion, a horizontal front upper surface portion that is provided on the front side of the vehicle body relative to the inclined portion, and a horizontal shape that is provided on the rear side of the vehicle body relative to the inclined portion and has a relatively high height. A rear upper surface portion, and an apex portion that is an inflection point of the inclined portion of the reinforcement and the rear upper surface portion is provided in the vicinity of the junction between the reinforcement and the pillar reinforcement. It is said.
[0015]
In the second aspect of the present invention, a substantially intermediate portion of the lower side of a point of inflection said front door opening between the inclined portion and the front upper surface portion of claim 1 is between the pair of left and right side sills It is characterized in that it is in the vicinity of the junction of the cross member to be installed.
[0016]
The invention according to claim 3 is characterized in that the apex portion according to claims 1 and 2 is provided inside a closed cross section of a pillar reinforcement constituting the center pillar.
[0017]
The invention according to claim 4 is characterized in that a bead portion is formed in the vicinity of the apex portion according to claims 1 to 3.
[0018]
【The invention's effect】
According to the first aspect of the present invention, the center pillar includes a center pillar located on the side of the vehicle body and a side sill provided at the lower end of the center pillar and extending in the longitudinal direction of the vehicle body. A vehicle body side structure in which a pillar reinforcement is provided across the pillar and the side sill, and the center of the side sill that forms the lower side of the front door opening and the rear door opening on the side of the vehicle body A reinforcement that extends in the longitudinal direction of the vehicle across the pillar and has an upper surface portion, a vertical wall portion, and a lower surface portion and has a substantially U-shaped cross section is provided, and the upper surface portion of the reinforcement is The rear part of the vehicle body is slanted in a side view so that the rear part of the vehicle body becomes relatively high gradually from the substantially middle part in the front-rear direction of the lower side of the front door opening toward the center pillar installation part. An inclined portion that is, the a relatively low height provided on the vehicle front side of the inclined portion horizontally forward top surface portion, said height is provided on the rear side of the vehicle body from the inclined portion is relatively high horizontal state Since the upper sill of the front sill, the lower end of the front sill, the upper end height of the side sill can be changed gradually. The height of the upper surface portion of the force can be kept low, and both the side impact performance can be secured and the boarding / exiting performance can be improved.
[0019]
In addition, the side sill's upper end height changes slowly, so the side sill and reinforcement can be formed in the foam (bending) process, eliminating the need for a conventional drawing (drawing) process and holding down when stretching the material. This eliminates the need for a press-down allowance, greatly improving the material yield and providing a cost advantage, and since the change part is gradual, it suppresses the occurrence of wrinkles during molding and looks great. Can be improved.
[0020]
Further, even if wrinkles are generated in the reinforcement during the formation of the reinforcement, it is disposed inside the closed cross section of the side sill, so that the appearance is not affected.
[0021]
Furthermore, since the part where the height of the side sill and reinforcement changes gradually even during a frontal collision of the vehicle, the stress does not concentrate on the changed part, and the impact at the time of frontal collision is not required without requiring additional reinforcement. Can fully compete.
[0022]
On the other hand, since the apex portion that is the inflection point of the inclined portion and the rear upper surface portion is provided in the vicinity of the junction between the reinforcement and the pillar reinforcement, the impact at the side collision is received by the pillar portion. It is possible to avoid stress concentration on the apex portion.
[0023]
According to the second aspect of the present invention, in addition to the effect of the first aspect, the substantially middle portion of the lower side of the front door opening, which is an inflection point between the front upper surface portion and the inclined portion , is Since it is in the vicinity of the joint portion of the cross member laid between the pair of side sills, the impact at the time of a side collision can be received by the cross member, so that the side collision performance can be further improved.
[0024]
According to the third aspect of the present invention, in addition to the effects of the first and second aspects, the apex portion is provided inside the closed cross section of the pillar reinforcement constituting the center pillar. The impact can be received at the pillar portion, and it is possible to reliably avoid stress concentration at the apex portion.
[0025]
According to the fourth aspect of the invention, in addition to the effects of the first to third aspects, since the bead portion is formed in the vicinity of the apex portion, the bead portion causes wrinkles when the reinforcement is formed. Generation | occurrence | production can be suppressed reliably.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings by attaching the same reference numerals to the same parts as those in the conventional configuration.
[0027]
FIG. 1 is a side view showing a vehicle body side structure of an automobile to which the present invention is applied, and FIG. 2 is a perspective view showing an essential part thereof. 3 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 4 is a cross-sectional view taken along line BB in FIG.
[0028]
Reference numeral 1 denotes a center pillar located on the side of the vehicle body. Reference numeral 2 denotes a side sill provided at the lower end of the center pillar 1 and extending in the longitudinal direction of the vehicle body. Further, a pillar reinforcement 7 is provided in the closed cross section of the center pillar 1 so as to extend over the center pillar 1 and the side sill 2.
[0029]
The side sill 2 includes a sill inner 2A and a sill outer 2B. The sill inner 2A includes a floor panel 4 constituting a floor surface of a passenger compartment, and a cross constructed between the pair of left and right side sills 2 and 2. Member 5 is joined.
[0030]
Note that the cross member 5 in the figure is a seat cross member that is usually disposed to support the front seat 10.
[0031]
6 indicates a door opening on the side of the vehicle body , 6a indicates an opening for the front door, 6b indicates an opening for the rear door, and the lower side α of the door opening 6 on the side of the vehicle body is defined by the side sill 2. It is constituted by the upper end.
[0032]
Within the closed cross-section of the side sill 2, there is provided a reinforce 8 having a substantially U-shaped cross section that extends in the vehicle longitudinal direction across the center pillar 1 and has an upper surface portion, a vertical wall portion, and a lower surface portion. . Specifically, the reinforcement 8 includes flange portions 8a and 8a at the front ends thereof, and is joined to the sill outer 2B and the sill inner 2A via the flange portions 8a and 8a by spot welding or the like, and the rear ends thereof. Then, it is provided so as to be joined to the pillar reinforcement 7. Further, since the general portion of the upper surface portion of the reinforcement 8 is only in contact with the back surface of the sill outer 2B via the protruding portion 12 formed in the general portion, distortion due to a welding point or the like is caused for the door. It does not appear on the lower side of the opening and can be obtained advantageously in appearance.
[0033]
The height of the upper surface of the reinforcement 8 is such that the rear part of the vehicle is relatively directed from the substantially intermediate part β in the front-rear direction of the lower side α toward the arrangement part of the center pillar 1 located at the rear of the vehicle. In addition, it is formed in an oblique shape as seen from the side so as to gradually increase, and the apex portion P, which is the formation inflection point of the rear portion thereof, is in the vicinity of the junction between the above-described reinforcement 8 and pillar reinforcement 7. Forming. That is, the upper surface portion of the reinforcement 8 has a side surface such that the rear portion of the vehicle body becomes relatively higher gradually from the substantially middle portion β in the front-rear direction of the lower side of the door opening 6a toward the portion where the center pillar 1 is disposed. An inclined portion 82 that is obliquely formed as viewed, a horizontal front upper surface portion 81 that is provided on the front side of the vehicle body relative to the inclined portion 82, and is provided on the rear side of the vehicle body relative to the inclined portion 82. A vertex portion P, which is a formation inflection point between the inclined portion 82 and the rear upper surface portion 83, is formed with the above-described rain force 8 and pillar. It is formed in the vicinity of the joint portion of the reinforcement 7.
[0034]
Accordingly, the height of the lower edge of the door opening, so determined by the surface on the reinforcement 8 which is disposed below the Shiruauta 2B, along with a change of the upper surface portion height of the reinforcement 8, the Shiruauta 2B The upper end of the vehicle is also inclined in a side view so that the rear part of the vehicle becomes relatively high gradually from the substantially middle part β in the longitudinal direction of the vehicle body toward the arrangement part of the center pillar 1 located behind the vehicle body. It is formed in a shape and is gently inclined. From the cross-sectional views shown in FIGS. 3 and 4, it can be seen that the closed cross-sectional shape of the portion where the center pillar 1, which is the rear portion of the vehicle, is larger.
[0035]
In particular, in this embodiment, the substantially middle portion β of the lower α is a inflection point of the front door opening 6 a to vary the upper surface height of the reinforcement 8, the pair of left and right between the side sill 2, 2 It is in the vicinity of the joint part of the cross member 5 installed on
[0036]
The apex portion P is provided inside the closed cross section of the pillar reinforcement 7 of the center pillar 1.
[0037]
In addition, a bead portion 9 is formed in the vicinity of the apex portion P of the reinforcement 8.
[0038]
In the figure, 11 indicates a rear seat.
[0039]
According to the structure of the above embodiment, the side sill 2 constituting the lower side α of the door opening 6 on the side of the vehicle body extends in the vehicle longitudinal direction across the center pillar 1 and crosses the center pillar 1 and has a substantially U-shaped cross section. A reinforce 8 of the mold is provided, and the upper surface portion of the reinforce 8 is a rear part of the vehicle body from a substantially middle portion β in the front-rear direction of the lower side α of the front door opening 6a toward the portion where the center pillar 1 is disposed. An inclined portion 82 that is formed in an oblique shape as viewed from the side so as to be relatively high, and a horizontal front upper surface portion 82 that is provided on the front side of the vehicle body from the inclined portion 82 and has a relatively low height. The horizontal rear upper surface part 83 provided on the rear side of the vehicle body with respect to the inclined part 82 and having a relatively high height is formed, so that the upper end height of the side sill 2 constituting the lower side α of the front door opening 6 is set. Since the change part can be loosened, the rear of the vehicle While ensuring the amount of the side sill sectional area kept low reinforcement upper surface height of the vehicle front portion, it is possible to achieve both the improvement in the passenger with the securing of side impact performance.
[0040]
Moreover, since the change in the height of the upper end of the side sill 2 is gradual, the side sill 2 and the reinforcement 8 can be formed in a foam (bending) process, so that a conventional drawing (drawing) process is not required and the material is stretched. Since there is no need for a press-down allowance at the time, the material yield can be greatly improved, and it is possible to obtain an advantage in terms of cost, and since the changing part is gradual, wrinkles are generated during molding. It can be suppressed and the appearance can be improved.
[0041]
Further, even if wrinkles are generated in the reinforcement 8 when the reinforcement 8 is molded, it is disposed inside the closed cross section of the side sill 2 and thus does not affect the appearance.
[0042]
Further, even when the frontal collision of the vehicle or the like, the portions where the height of the side sill 2 and the reinforcement 8 change gradually, so stress does not concentrate on the substantially intermediate portion β, which is the changing portion, and additional reinforcing means is required. Even without this, it can sufficiently resist the impact of a frontal collision.
[0043]
On the other hand, the apex portion P (that is, the inflection point P between the inclined portion 82 and the rear upper surface portion 83) , which is the formation inflection point of the rear portion of the reinforcement 8, is formed between the reinforcement 8 and the pillar reinforcement 7. Since it is provided in the vicinity of the joint portion, an impact at the time of a side collision is received by the center pillar 1 portion, so that it is possible to avoid stress concentration on the apex portion P.
[0044]
In particular, according to this embodiment, in addition to the above effects, said substantially intermediate portion β on surface of said front door opening is the inflection point of changing the height lower side of the reinforcement 8, a pair of left and right the Since it is in the vicinity of the joint portion of the cross member 5 installed between the side sills 2 and 2, the impact at the time of a side collision can be received by the cross member 5, so that the side collision performance can be further improved.
[0045]
In addition, since the apex portion P is provided inside the closed cross section of the pillar reinforcement 7 constituting the center pillar 1, the impact at the side collision can be received by the center pillar 1 portion, and the apex portion P It is possible to reliably avoid stress concentration on the surface.
[0046]
And since the bead part 9 is formed in the vicinity of the said vertex part P, it can suppress that a wrinkle generate | occur | produces at the time of shaping | molding of the said reinforcement 8 by this bead part 9. FIG.
[Brief description of the drawings]
FIG. 1 is a side view showing a side part structure of an automobile according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a main part in the same embodiment.
3 is a cross-sectional view taken along line AA in FIG.
4 is a cross-sectional view taken along line BB in FIG.
FIG. 5 is a side view of a conventional structure.
FIG. 6 is a perspective view showing a main part in a conventional structure.
[Explanation of symbols]
1 Center pillar 2 Side sill 5 Cross member
6 Door opening
6a Front door opening
6b Rear door opening 7 Pillar reinforcement 8 Reinforce 9 Bead part α Lower side β Middle part P Vertex part

Claims (4)

A center pillar located on the side of the vehicle body and a side sill provided at the lower end of the center pillar and extending in the longitudinal direction of the vehicle body, and a pillar reinforcement extending between the center pillar and the side sill inside the closed cross section of the center pillar. A vehicle body side structure provided,
An upper surface portion, a vertical wall portion, and a lower surface portion extend in the vehicle front-rear direction across the center pillar in the closed cross section of the side sill that forms the lower side of the front door opening and the rear door opening on the side of the vehicle body And provided with a reinforcement having a substantially U-shaped cross section, and an upper surface portion of the reinforcement from a substantially middle portion in the front-rear direction of the lower side of the front door opening to the center pillar arrangement portion. An inclined portion formed in an oblique shape as viewed from the side so that the rear portion of the vehicle body becomes relatively and gradually higher toward the vehicle, and a horizontal shape provided at a front side of the vehicle body from the inclined portion and having a relatively low height And a horizontal rear upper surface provided on the rear side of the vehicle body from the inclined portion and having a relatively high height , and the inclined portion and the rear upper surface portion of the reinforcement The vertex that is the inflection point is Vehicle body side structure for an automobile, characterized in that the Osu provided near the junction of the pillar reinforcement. A substantially middle portion of the lower side of the front door opening, which is an inflection point between the front upper surface portion and the inclined portion, is in the vicinity of a joint portion of a cross member constructed between a pair of left and right side sills. The vehicle body side part structure according to claim 1.   The vehicle body side part structure according to any one of claims 1 and 2, wherein the apex portion is provided inside a closed cross section of a pillar reinforcement constituting the center pillar.   The vehicle body side part structure according to any one of claims 1 to 3, wherein a bead portion is formed in the vicinity of the apex portion.

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