JP2019116224A - Vehicle side part structure - Google Patents

Abstract

To provide a vehicle side part structure capable of restraining a junction dot part of a rocker inner panel to a rocker outer panel from breaking, so that the junction part peels off upon occurrence of a side collision.SOLUTION: The vehicle side part structure includes: a rocker 16 constituted by point-jointing of a pair of upper and lower flange parts formed at a rocker outer panel 32 and a rocker inner panel 30 made of high strength steel plate. To the rocker outer panel 32, there is joined a lower end part of a center pillar outer reinforcement 76 in a flared shape. In a vehicle longitudinal direction range on a more forward side in a vehicle longitudinal direction than a front side bent part 114 at the lower end part of the center pillar outer reinforcement 76 over a more rearward side in a vehicle longitudinal direction than a rear side bent part 116 in vehicle side view, there is provided a hemming part folded so that one of the lower flange part of the rocker inner panel and the lower flange part of the rocker outer panel covers the other thereof.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle side structure.

  From the viewpoint of reducing the weight of the vehicle body, high-tension steel plates are sometimes used for the outer plate and frame members of the vehicle body. As an example, Patent Document 1 below discloses a rocker structure including an inner panel and an outer panel made of a high-tensile steel plate whose vertical cross-sectional shape is formed in a substantially hat shape, and the upper and lower flanges of both panels are spot welded. ing.

JP 2011-195108 A

  However, when the above configuration is adopted and a high tensile steel plate is spot welded, a gap is formed between the steel plates, and it is difficult to form a molten portion (nugget) generated during welding, and it is difficult to secure bonding strength. For this reason, it is conceivable that the bonding point between the inner panel and the outer panel peels off at the time of a side collision.

  In view of the above facts, it is an object of the present invention to obtain a vehicle side structure capable of suppressing separation of a bonding site due to breakage of a joint contact portion between a rocker panel and a rocker outer panel in a side collision. .

  The vehicle side portion structure according to the present invention according to the first aspect has a closed cross-section structure by point-joining a pair of upper and lower flange portions respectively formed on an inner panel and an outer panel made of high tension steel plates at least one side, A rocker which is disposed on the lower side of the vehicle body in the vertical direction of the vehicle and extends along the longitudinal direction of the vehicle, and an outer plate of a center pillar which extends upward in the vertical direction of the vehicle from an intermediate portion in the longitudinal direction of the rocker. And the lower end portion of the lower end portion of the vehicle is viewed from the side, and the center pillar outer reinforcement joined to the outer panel, and the vehicle is bent more than the front bent portion of the lower end portion of the center pillar outer reinforcement in vehicle side view. It is provided in a vehicle longitudinal direction range extending to the vehicle longitudinal direction rear side with respect to the longitudinal direction front side and the rear side bending portion of the lower end portion, and the lower side of the inner panel One of the lower flange portion of the flange portion and the outer panel has an a hemming portion folded so as to cover the other.

  According to the first aspect of the present invention, a rocker having a closed cross-sectional structure is configured by point-joining a pair of upper and lower flange portions respectively formed on an inner panel and an outer panel made of a high tensile steel plate. Further, the lower end portion of the center pillar outer reinforcement that constitutes the outer plate of the center pillar is joined to the outer panel of the rocker. For this reason, when a collision load is input to the center pillar inward in the vehicle width direction at the time of a side collision, the outer panel of the rocker is provided with the joint portion between the lower end portion of the center pillar outer reinforcement and the outer panel of the rocker A twisting force (moment) acts with the vicinity of the joint portion between the upper flange portions of the rocker as an axis in the vehicle longitudinal direction.

  Here, the lower end portion of the center pillar outer reinforcement in the side view of the vehicle is formed in a flared shape, and the front end portion of the lower end portion is more forward than the front bent portion and the rear end portion of the lower end portion. A hemming portion in which one of the lower flange portion of the inner panel of the rocker and the lower flange portion of the outer panel covers the other is provided in a vehicle longitudinal direction range extending to the rear side of the vehicle. For this reason, when a collision load is input from the center pillar outer reinforcement to the outer panel of the rocker at the time of a side collision, the bonding direction of one of the lower flange of the inner panel of the rocker and the lower flange of the outer panel is peeled off. Not in the shear direction. Accordingly, the joint strength of the joint portion between the lower flange portion of the inner panel of the rocker and the lower flange portion of the outer panel is improved, and the joint portion is less likely to be broken. Also, since one of the flanges is folded back, one of the lower flange of the inner panel of the rocker and the lower flange of the outer panel can not be removed from the other unless the flange is bent back. For this reason, compared with the case where the lower flange portion of the rocker is not hemmed, the resistance against the collision load at the time of a side collision is increased. As a result, when a twisting force is applied to the outer panel of the rocker due to a side collision, the occurrence of peeling at the bonding site is suppressed.

  As described above, the vehicle side portion structure according to the present invention according to claim 1 is that the joint point portion between the rocker panel and the rocker outer panel is prevented from being broken and the joint portion being peeled off at the side collision. It has the excellent effect of being able to

It is a perspective view which shows the vehicle body side part to which the vehicle side part structure which concerns on 1st Embodiment is applied. It is a perspective view which expands and shows the junction part of the rocker and center pillar shown by FIG. (A) is a schematic longitudinal cross-sectional view which simplified the longitudinal cross section of the vehicle side structure cut | disconnected along the AA shown in FIG. 2 for description, (B) is B line arrow of (A). It is an enlarged view of a vision part. The process of the hemming process performed in the vehicle side structure which concerns on 1st Embodiment is shown, (A) is a side view which shows the state of the vehicle side structure before hemming processing, (B) is after hemming processing. It is a side view which shows the state of the vehicle side part structure. It is a longitudinal cross-sectional view corresponding to FIG. 3 (B) which shows schematic structure of the 1st modification of the hemming part in the vehicle side part structure which concerns on 1st Embodiment. It is a longitudinal cross-sectional view corresponding to FIG. 3 (B) which shows schematic structure of the 2nd modification of the hemming part in the vehicle side part structure which concerns on 1st Embodiment. It is a longitudinal cross-sectional view corresponding to FIG. 3 (B) which shows schematic structure of the hemming part vicinity in the vehicle side part structure which concerns on 2nd Embodiment. (A) is the schematic longitudinal cross-sectional view which simplified the cross section at the time of cut | disconnecting the vehicle side part structure which concerns on 2nd Embodiment along the cutting plane similar to the AA shown in FIG. 2 for description. (B) is an enlarged view of the C line arrow part of (A). (A) is a schematic longitudinal cross-sectional view for simplifying the cross-section in the case of cutting the vehicle side structure according to a comparative example along the same cutting line as that taken along line A-A shown in FIG. B) is an enlarged view of the D line arrow part of (A). (A) is a schematic longitudinal cross-sectional view at the time of side collision load being input with respect to the vehicle side part structure shown in FIG. 9, (B) is an enlarged view of the E line arrow part of (A).

First Embodiment
Hereinafter, the vehicle side part structure which concerns on 1st Embodiment is demonstrated using FIGS. 1-6. In addition, the arrow FR suitably shown in these figures has shown the vehicle front side, and the arrow UP has shown the vehicle upper side. The arrow IN indicates the inside in the vehicle width direction. Also, in FIG. 3, the vehicle side portion structure according to the present invention described in FIG. 2 will be described using a simplified drawing for the purpose of explanation.

(Overall configuration of vehicle body side 12)
FIG. 1 is a perspective view showing a vehicle body 14 centering on a vehicle body side portion 12 of an automobile (vehicle) 10 to which a vehicle side portion structure according to the present embodiment is applied. As shown in this figure, at the lower end portion of the vehicle body side portion 12, a rocker 16 extending along the longitudinal direction of the vehicle is disposed. On the other hand, at an upper end portion of the vehicle body side portion 12, a roof side rail 18 extending substantially in the longitudinal direction of the vehicle is disposed. The rocker 16 and the roof side rail 18 are both long vehicle body frame members having a closed cross-sectional structure.

  The rocker 16 and the roof side rail 18 are connected in the vehicle vertical direction by three pillars such as a front pillar 22, a center pillar 24, and a rear pillar 26. Each of the three pillars is a long (columnar) vehicle body frame member having a closed cross-sectional structure, and the front pillar 22 is a front end portion of the rocker 16 and a front end portion of the roof side rail 18 in the vehicle vertical direction. It is connected. The center pillar 24 connects the longitudinal middle portion of the rocker 16 and the longitudinal middle portion of the roof side rail 18 in the vehicle vertical direction, and the rear pillar 26 is a rear end portion of the rocker 16 and a rear end of the roof side rail 18 The units are connected in the vertical direction of the vehicle.

[Rocca 16]
As shown in FIGS. 1 to 3, the rocker 16 is provided with a long rocker panel 30 disposed on the vehicle interior side of the vehicle body side portion 12 and a rocker disposed on the vehicle exterior side of the vehicle body side 12. And an outer panel 32. Each of the rocker panel 30 and the rocker outer panel 32 is made of a high tensile strength steel sheet (high tensile strength steel sheets). In addition, in this specification, a "high-tensile steel plate" means the steel plate whose tensile strength is higher than a common steel plate, and means that whose tensile strength is 440 Mpa or more. Furthermore, the “high-tensile steel plate” is preferably an ultra-high-tensile steel plate having a tensile strength of 980 MPa or more.

  The cross-sectional shape of the rocker panel 30 when cut in a direction orthogonal to the longitudinal direction is a hat shape opened outward in the vehicle width direction. Specifically, the rocker panel 30 includes a pair of upper and lower flanges (upper flange 36A and lower flange 36B), and a top wall 38 bent inward in the vehicle width direction from the lower end of the upper flange 36A. A side wall 40 bent downward from the vehicle inner end of the top wall 38, and a bottom wall 42 bent from the lower end of the side wall 40 outward in the vehicle width direction to the lower flange 36B; Is composed including. In FIG. 2, side wall portion 40 is drawn as a step shape in which a plurality of vertical wall portions 44 extended in the vehicle vertical direction and a plurality of horizontal wall portions 46 extended in the vehicle width direction are alternately connected. However, in FIG. 3A, the side wall portion 40 is simplified and drawn in a flat plate shape.

  Similarly, the rocker outer panel 32 also has a hat shape that is opened inward in the vehicle width direction as a cross-sectional shape when cut in a direction orthogonal to the longitudinal direction. Specifically, upper and lower flanges (upper flange 48A and lower flange 48B), top wall 50 bent outward from the lower end of upper flange 48A in the vehicle width direction, and top wall 50 A side wall 52 bent from the vehicle outer end to the lower side of the vehicle, and a bottom wall 54 bent from the lower end of the side wall 52 inward in the vehicle width direction to the lower flange 48B There is.

  Further, as shown in FIG. 2, the rocker outer panel 32 has a step shape in which the side wall portions 52 alternately connect a plurality of vertical wall portions 56 and horizontal wall portions 58 similarly to the rocker panel 30. Referring to the side wall 52 of the rocker outer panel 32, the side wall 52 is a first vertical wall 56A which is bent downward from the end of the top wall 50 in the vehicle width direction, and the first vertical wall The first lateral wall 58A bent outward from the lower end of the portion 56A and the lower end of the first lateral wall 58A in the vehicle width direction are bent downward, and the vehicle width direction of the bottom wall 54 And a second vertical wall portion 56B leading to the outer end. And the junction part 60 is formed by the lower end part of the center pillar outer reinforcement 76 mentioned later joining to the outer surface of this 1st vertical wall part 56A. In FIG. 3A, as in the case of the rocker panel 30, the side wall portion 52 is simplified and drawn in a flat plate shape.

  A center pillar inner panel 72, which will be described later, is disposed adjacent to the outside of the vehicle interior of the rocker panel 30 described above. The upper flange portion 36A of the rocker panel 30 and the upper flange portion 48A formed on the upper end of the rocker outer panel 32 with the center pillar inner panel 72 held therebetween, spot welding or laser welding (laser screw welding; The flange joint portion 62 is formed by point welding (point welding) such as LSW). In the present embodiment, the rocker panel 30, the center pillar inner panel 72, and the rocker outer panel 32 are joined by spot welding at substantially equal intervals along the longitudinal direction of the flange mating portion 62.

  Here, as shown in FIG. 4 (A), at an intermediate portion in the longitudinal direction of the rocker outer panel 32, the flange width (flange height along the vertical direction of the vehicle) of the lower flange portion 48B is on the vehicle lower side. It is stretched approximately two times toward the head, and hemming is possible by folding it back to the rocker panel 30 side along the folding line 64. The hemming portion 66 which is a region where the hemming process is performed is a portion where the lower flange portion 34B is bent, and a bent portion 68 extended in the vehicle vertical direction along the folding line 64 and the flange portion 34 folded back by bending. It is a portion to be formed, and is constituted by a folded back portion 70 extending from the lower end of the bent portion 68 to the lower end of the flange portion 34.

[Center pillar 24 (Center pillar outer reinforcement 76)]
As shown in FIGS. 1 to 3, the center pillar 24 is disposed on the outer side of the elongated center pillar inner panel 72 disposed on the vehicle interior side of the vehicle body side portion 12 and the center pillar inner panel 72. And a center pillar outer reinforcement 76 which forms a closed cross-sectional structure by being joined to the center pillar inner panel 72. Each of the center pillar inner panel 72 and the center pillar outer reinforcement 76 is formed of the above-described high tensile steel plate (high tensile strength steel sheets).

  Specifically, as shown in FIG. 2, the center pillar inner panel 72 has a substantially hat-shaped cross section when cut in a direction perpendicular to the longitudinal direction, and has a pair of front and rear pairs. Flange portion (front flange portion 78A and rear flange portion 78B), a front wall portion 80 bent inward in the vehicle width direction from a rear end portion of the front flange portion 78A, and a vehicle width direction end of the front wall portion 80 And a rear wall portion 84 connected to the rear flange portion 78B after being bent outward from the rear end portion of the side wall portion 82 in the vehicle width direction. It is done.

  On the other hand, as shown in FIG. 1, the center pillar outer reinforcement 76 is formed at the upper end and is attached to the roof side rail 18, and the first attachment 96 is formed at the lower end and the rocker outer panel 32. And a general part 100 which is a part excluding both the mounting parts. The first mounting portion 96 is formed in a T-shape in a side view of the vehicle, and the second mounting portion 98 is formed in a flared shape in a side view of the vehicle.

  In addition, center pillar outer reinforcement 76 is curved inward in the vehicle width direction from the front and rear ends of the outer side wall 110 disposed at the outermost side in the vehicle width direction and the front and rear ends of the outer wall 110 in cross section. A pair of front and rear flange portions of the center pillar inner panel 72 are bent in a direction away from each other from the end portions in the vehicle width direction of the front wall portion 108 and the rear wall portion 112 and the front wall portion 108 and the rear wall portion 112 A pair of front and rear flanges (front flange portion 106A and rear flange portion 106B) joined to the front flange portion 78A and the rear flange portion 78B), and has a deep bottom and substantially hat shape .

  As described above, the second attachment portion 98 is formed in a flared shape in a side view, and the front wall portion 108 passes through the front bent portion 114 and lands on the top wall portion 50 of the rocker outer panel 32 at the front landing portion 102A. It is done. The rear wall portion 112 is landed on the top wall portion 50 of the rocker outer panel 32 at the rear landing portion 102 B through the rear side bending portion 116. Further, in the second attachment portion 98, it is bent in an inverted L shape in a vehicle longitudinal direction view in a range from the front end of the front landing portion 102A to the rear end of the rear landing portion 102B. That is, in the front landing portion 102A and the rear landing portion 102B, they are bent downward from the end in the vehicle width direction, and in the general portion 110, they are generally extended as it is to the vehicle lower side. The side surface portion 104 for bonding is formed. The side surface portion 104 is joined by spot welding or spot welding or laser welding in a state of being in contact with the first vertical wall portion 56A of the side wall portion 52 of the rocker outer panel 32.

  Next, the procedure of hemming and other joining performed on the hemming portion 66 of the vehicle side structure according to the present embodiment will be described with reference to FIGS. 4 (A) and 4 (B).

  First, as a premise of the hemming process, as shown in FIG. 4A, the hemming process is performed on the longitudinal middle portion of the rocker outer panel 32 (that is, the lower side of the center pillar outer reinforcement 76 in the vehicle vertical direction). A hemming portion 66 which is an area to be formed is formed. More specifically, the hemming portion 66 is located in front of the front bending portion 114 of the lower end portion of the center pillar outer reinforcement 76 in a vehicle side view, and in front of the rear bending portion 116 of the lower end portion. It is provided in a vehicle longitudinal direction range (a range from the front end of the front landing portion 102A to the rear end of the rear landing portion 102B in the present embodiment).

  In performing the hemming process, first, the hemming portion 66 (note that the word “hemming portion 66” used when describing with reference to FIG. 4A is not the hemming portion 66 to be finally formed, Place the rocker outer panel 32 on which the belt-shaped plate-like portion before the bending process is formed in the previous step so that the rocker outer panel 32 is laid at the processing position, and make the hemming portion 66 approximately perpendicular along the folding line 64. Bending (Hemming first step). Next, the center pillar inner panel 72 and the rocker panel 30 are placed on the rocker outer panel 32 so that the end portions thereof are along the fold line 64, and the folded portion 70 bent substantially at a right angle in the first step Furthermore, it bends inside (hemming processing 2nd process). Next, the folded portion 70 is pressed or hit with a tool such as a hemming device or a hammer to further bend it several tens of degrees. Thus, the folded portion 70 of the rocker outer panel 32 is folded 180 degrees so as to cover the lower flange portion 36B of the rocker panel 30 while holding the end of the center pillar inner panel 72 (hemming processing third step).

  The longitudinal direction of the rocker 16 with four folded back portions 70 of the rocker outer panel 32, the lower flange portion 36B of the rocker panel 30, the lower end portion of the center pillar inner panel 72, and the lower flange portion 48B of the rocker outer panel 32 Along the line, point welding (point welding) such as spot welding or the above-mentioned laser welding is performed at substantially equal intervals. In addition, the site | part to which this spot welding etc. are made in each panel is called "the hit point part 118."

(Action and effect)
Next, the operation and effect of the vehicle side portion structure according to the present embodiment will be described in comparison with the vehicle side portion structure according to the comparative example.

  As shown in FIGS. 9A and 9B and FIGS. 10A and 10B, in the vehicle side structure according to this comparative example, the rocker panel 30 and the rocker outer panel 32 made of high strength steel plate are used. The rocker 16 is formed by spot welding (spot welding or the above-mentioned laser welding) of the formed flanges 36 and 48, and the lower end of the center pillar outer reinforcement 76 is joined to the rocker outer panel 32. There is. Therefore, when a collision load F is input to the center pillar 24 inward in the vehicle width direction at the time of a side collision, the rocker outer panel is joined via the joint portion 60 between the lower end portion of the center pillar outer reinforcement 76 and the rocker outer panel 32. A twisting force (moment) M acts on the shaft 32 in the direction D1 with the vicinity of the flange mating portion 62 located at the upper end of the rocker 16 as an axis.

  Here, in the vehicle side structure according to the comparative example, the lower flange portion 36B of the rocker panel 30 and the lower flange portion 48B of the rocker outer panel 32 are overlapped, and spot welding such as spot welding is performed in the thickness direction. Since the tensile force N is applied in the direction D2 to the hitting portion 118 at the lower end of the rocker 16 by the moment M described above, the hitting portion 118 is broken and the rocker panel 30 and the rocker outer panel 32 Is considered to peel off.

  On the other hand, in the vehicle side structure according to the present embodiment, as shown in FIG. 3, the lower flange portion 48B of the rocker outer panel 32 is hemmed so as to cover the lower flange portion 36B of the rocker panel 30. Thus, the hemming portion 66 is formed. For this reason, a shear force Q is applied in the direction D3 between the folded portion 70 of the lower flange portion 48B of the rocker outer panel 32 and the striking portion 118 of the lower flange portion 36B of the rocker panel 30, and the joint strength of the striking portion 118 is improved. As a result, the hitting portion 118 is less likely to break.

  Further, since the lower flange portion 48B of the rocker outer panel 32 is folded back, the rocker outer panel 32 can not be removed from the rocker panel 30 unless it is bent back. For this reason, compared with the case where the lower flange portion 48B of the rocker 16 is not hemmed, the resistance against the collision load at the time of the side collision is increased. As a result, when a twisting force (moment) M acts on the outer panel 32 of the rocker 16 due to a side collision, it is possible to suppress the occurrence of peeling at the bonding site.

First Modified Example of First Embodiment
Next, a first modified example of the present embodiment will be described using FIG. The same components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted. Also, this first modification is a reference example.

  As shown in FIG. 5, according to the first modification of the present embodiment, the inner peripheral surface of the lower flange portion 48B of the rocker outer panel 32 folded back by hemming, and the rocker panel 30 held by the inner peripheral surface. The lower flange portion 36 </ b> B and the lower end portion of the center pillar inner panel 72 are characterized by being joined by an adhesive 120.

  Specifically, in the first step of the hemming process described above, the hemming portion 66 formed on the rocker outer panel 32 is bent substantially at right angles along the folding line 64, and then the vicinity of the folding line 64 is first described. The adhesive 120 is applied to the In this modification, a structural adhesive is used as the hemming adhesive, but other adhesives may be used.

  Next, in the second step of hemming, the center pillar inner panel 72 is placed and adhered along the folding line 64 on the rocker outer panel 32 to which the adhesive 120 has been applied (first bonding step) ). At that time, the adhesive 120 applied on the rocker outer panel 32 is pressed by the center pillar inner panel 72, and a part of the adhesive 120 flows from the vicinity of the folding line 64 onto the center pillar inner panel 72, the center pillar The rocker panel 30 is placed on and adhered to the inner panel 72 (second bonding step). Next, in a state where a part of the adhesive 120 pressed by the lockinna panel 30 flows into the lockiner panel 30, the folded portion 70 of the lockinna panel 30 bent at a substantially right angle is further bent inward. (3rd adhesion process). In each process, the adhesive 120 is appropriately replenished so as to fill the gaps generated between the panels and the bent portion 68. Finally, in the third step of hemming, the folded portion 70 is pressed or struck with a tool such as a hemming device or a hammer and is further bent several tens of degrees.

  According to this modification, the inner peripheral surface of the lower flange portion 48B of the rocker outer panel 32 bent by hemming, the lower flange portion 36B of the rocker panel 30 held by the inner peripheral surface, and the center pillar inner panel 72 The lower end portion is bonded in a state in which the adhesive 120 is filled so as to fill the gaps generated in the respective panels and at the bent portions 68. As a result, the bonding area can be secured, and as a result, the bonding strength is improved, the peeling of the rocker panel 30 and the rocker outer panel 32 at the time of a side collision can be more effectively suppressed.

Second Modification of First Embodiment
Next, a second modified example of the present embodiment will be described using FIG. The same components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 6, in the second modified example according to the present embodiment, after the bonding with the adhesive 120 in the first modified example is performed, spot welding such as spot welding is performed in the plate thickness direction at the bonding location. It is characterized in that it is made.

  Specifically, as described in the first modification according to this embodiment, the inner peripheral surface of the lower flange portion 48B of the rocker outer panel 32 folded back by hemming, and the rocker panel held by the inner peripheral surface The lower flange portion 36 B and the lower end portion of the center pillar inner panel 72 are joined together by the adhesive 120 so as to fill the gaps formed between the panels and in the bent portion 68. Then, in a state in which the panels are overlapped by the joining, spot welding such as spot welding is performed at a plurality of locations at equal intervals along the longitudinal direction of the rocker 16, thereby joining the panels in the thickness direction ing. As a result of combined use of adhesion and welding, the joint strength is further improved, and peeling of the rocker panel and rocker outer panel at the time of a side collision can be more effectively suppressed.

Second Embodiment
Hereinafter, the vehicle side part structure which concerns on 2nd Embodiment is demonstrated using FIG.7 and FIG.8 (A), (B). In FIGS. 8A and 8B, the vehicle side portion structure according to the present invention will be described with reference to the simplified drawings. The same components as those of the above-described embodiment are denoted by the same reference numerals and the description thereof will be omitted.

(Configuration of vehicle side structure)
In the vehicle side structure according to the present embodiment, the hemming portion 122 is formed on the rocker panel 30, the lower end portion of the hemming portion 122 is bent along the rocker outer panel 32, and the bottom wall portion 54 of the rocker outer panel 32 is formed. It is characterized in that it is bonded to

  Specifically, the rocker panel 30 includes a pair of upper and lower flanges (upper flange 124A and lower flange 124B) and a top wall 38 bent inward in the vehicle width direction from the lower end of the upper flange 124A. And a side wall 40 bent downward from the vehicle inner end of the top wall 38, and a bottom wall 42 bent from the lower end of the side wall 40 outward in the vehicle width direction to the lower flange 124B. And is comprised.

  And as the lower flange part 124B is shown by FIG. 7, in the intermediate part of the longitudinal direction of the rocker outer panel 32, the flange width is extended slightly shorter than 3 times toward the vehicle lower side, The hemming process is formed by folding back along the folding line 64.

  The hemming portion 122 which is a region where the hemming process is performed is configured by the bent portion 126, the folded portion 128, and the extending portion 130. The bending portion 128 is a portion for bending the flange portion 124B, and is a portion extending in the vehicle longitudinal direction along the folding line 64 (see FIG. 4A). The folded back portion 128 is a portion where the flange portion 124B is folded back by bending, and is a portion which extends from the lower end of the bent portion 126 to the inner end of the extending portion 130 inside in the vehicle width direction. The extension portion 130 is a portion for bending the flange portion 124B along the bottom wall portion 54 of the rocker outer panel 32, and a portion extending from the upper end of the folded portion 128 to the outer end of the flange portion 124B in the vehicle width direction. It is.

  The extension portion 130 is formed by bending and extending the folded portion 128 to the outside of the vehicle at an angle substantially equal to the angle formed by the lower flange portion 48B and the bottom wall portion 54 of the rocker outer panel 32, and the upper surface thereof and the rocker outer panel 32. The lower surface of the bottom wall portion 54 is bonded by an adhesive 120.

(Action and effect)
Next, the function and effect of the vehicle side portion structure according to the present embodiment will be described using FIG.

  Also in the present embodiment, the lower flange portion 124B of the rocker panel 30 is hemmed so as to cover the lower flange portion 48B of the rocker outer panel 32 and then point-welded as in the first embodiment described above. ing. For this reason, when a collision load at the time of a side collision is input to the center pillar 24, the load does not act on the hitting point portion 118 in the peeling direction, but the load acts on the shearing direction as in the first embodiment. Effects and effects of However, unlike the first embodiment described above, since the bent portion 128 is bent from the lower flange portion 124B side of the rocker panel 30 to the lower flange portion 48B side of the rocker outer panel 32, the lower flange portion 48B and the folded portion 128 In the meantime, the shear force Q acts on the upper side of the vehicle (direction D4).

  Further, as described above, since the bent portion 128 is bent from the lower flange portion 124B side of the rocker panel 30 to the lower flange portion 48B side of the rocker outer panel 32, when the rocker outer panel 32 is pushed upward to the vehicle, As the angle θ between the lower flange portion 48B and the bottom wall portion 54 of the rocker outer panel 32 becomes larger, the lower flange portion 48B of the rocker outer panel 32 and the folded portion 128 of the rocker panel 30 incline to the vehicle outer side (FIG. A), see the two-dot chain line in (B)). As a result, it is conceivable that breakage of the hitting portion 118 due to the cross-sectional collapse occurs and peeling of the rocker panel 30 and the rocker outer panel 32 occurs.

  However, in the vehicle side structure according to the present embodiment, as shown in FIG. 7, the hemming portion provided with the extension portion 130 in addition to the bent portion 126 and the folded portion 128 in the lower flange portion 124B of the rocker panel 30. 122 are formed. The extending portion 130 is formed by bending the folded portion 128 to the outside of the vehicle at an angle substantially equal to the angle θ formed by the lower flange portion 48B and the bottom wall portion 54 of the rocker outer panel 32, and the upper surface and the bottom wall of the rocker outer panel 32. The lower surface of the portion 54 is bonded with an adhesive 120. For this reason, since the extension portion 130 reinforces the bottom wall portion 54 of the rocker outer panel 32 and suppresses the change of the angle θ, the peeling of the rocker panel 30 and the rocker outer panel 32 due to the breakage of the hitting portion 118 due to the cross section collapse It can be suppressed.

<Supplementary explanation of the above-described embodiment>
In the embodiment described above, although both of the rocker panel 30 and the rocker outer panel 32 have been described as made of high tensile steel plate, the present invention is not limited thereto, and at least one of the rocker panel 30 and the rocker outer panel 32 is made of high tensile steel plate Good. Even if either one of the two is a plain steel plate, the effect of the present invention can be obtained.

10 Car (vehicle)
16 Rocker 24 Center Pillar 30 Rockinna Panel (Inner Panel)
32 Locker outer panel (outer panel)
36A upper flange portion 36B lower flange portion 48A upper flange portion 48B lower flange portion 66 hemming portion 76 center pillar outer reinforcement 114 front bending portion 116 rear bending portion 118 hitting portion 122 hemming portion

Claims (1)

A closed cross-sectional structure is obtained by point-joining a pair of upper and lower flanges respectively formed on an inner panel and an outer panel, at least one of which is made of a high tensile steel plate, and is disposed below the vehicle side Together with a rocker extending along the longitudinal direction of the vehicle,
A center pillar outer reinforcement which constitutes the outer plate of a center pillar extended to the upper side in the vertical direction of the vehicle from the middle portion in the longitudinal direction of the rocker, and the lower end portion has a flared shape in a side view of the vehicle and is joined to the outer panel And the
It is provided in a vehicle longitudinal direction range extending in the vehicle longitudinal direction front side with respect to the front side bending portion of the lower end portion of the center pillar outer reinforcement in vehicle side view and a vehicle longitudinal side rear side with respect to the vehicle longitudinal direction rear side with respect to the rear side bending portion A hemmed portion folded so that one of the lower flange portion of the inner panel and the lower flange portion of the outer panel covers the other;
Vehicle side structure having.