JP2012111246A - Side sill structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side sill structure of a vehicle, which can increase bending strength of a side sill while suppressing an increase in weight.SOLUTION: In the side sill structure of the vehicle, reinforcing bodies for reinforcing the side sill are incorporated in the side sill 30 which comprises lateral parts on both sides, elongated in a direction orthogonal to a vehicle-width direction, and top and under surface parts positioned on the lateral parts on both the sides and forming corner parts between them and the lateral parts on both the sides, respectively. The side sill structure of the vehicle includes the plurality of first reinforcing bodies 40, 60 and 50 which are mounted in the side sill in such a manner as to correspond to parts 7, 8 and 9 for being coupled to a plurality of cross members 4, 5 and 6 elongated in the vehicle-width direction, respectively, and which each have a bulkhead for partitioning the inside of the side sill in the longitudinal direction of a vehicle body, and the second reinforcing body 70 which is elongated in the longitudinal direction of the vehicle body and which is mounted in the side sill inside the corner part between the under surface part and the lateral part on the vehicle-width-direction outside of the side sill. The first and second reinforcing bodies are coupled together.

Description

  The present invention relates to a vehicle side sill structure in which a reinforcing body for reinforcing the side sill is incorporated in a side sill that extends in the longitudinal direction of the vehicle body at a lower part of the vehicle body.

  In vehicles such as automobiles, side sills extending in the longitudinal direction of the vehicle body are arranged on the left and right sides at the lower part of the vehicle body, and these side sills are generally located on the inner side in the vehicle width direction and on the outer side in the vehicle width direction. The side sill outer is formed into a closed cross-sectional shape. Moreover, what attached the reinforcement body for reinforcing this side sill to the side sill is generally known.

  For example, Patent Document 1 discloses a structure in which a reinforcing body is disposed in a coupling portion with a pillar corresponding to the working opening in a side sill in which a working opening for coupling with a pillar is formed. ing. Further, for example, in Patent Document 2, a reinforcing body that forms a plurality of closed cross sections extending in the longitudinal direction of the side sill between the inner panel and the inner panel near the upper corner of the inner sill is disposed. It is disclosed.

JP 2000-085634 A JP 2009-1113766 A

  However, as disclosed in Patent Document 1 and Patent Document 2, when a reinforcing body is attached and reinforced inside a side sill formed in a closed cross-sectional shape, the reinforcing body causes an increase in weight. In a side sill, how to reinforce while suppressing an increase in weight is an important issue.

  Further, in vehicles such as automobiles, in order to improve the safety of the occupant when receiving a collision from the side of the vehicle body (so-called side collision), even when a load is applied to the side sill, the side sill is It is required to increase the bending strength of the side sill so as not to bend and deform inward in the direction.

  The thing of the said patent document 1 can raise the cross-sectional rigidity at the time of a side collision in the connection part with the pillar of a side sill, and the thing of the said patent document 2 is a cross-sectional shape of the side sill at the time of a side collision. Although it is possible to suppress the collapse of the side sill, further improvements to the improvement in bending strength are desired for the side sill.

  Therefore, the present invention can suppress the bending deformation of the side sill in the vehicle width direction inward even when a load is applied to the side sill while suppressing an increase in weight, and increases the bending strength of the side sill. An object of the present invention is to provide a side sill structure for a vehicle.

  For this reason, the invention according to claim 1 of the present application is located between the side portions on both sides that extend in the vehicle longitudinal direction at the lower portion of the vehicle body and extend in the direction orthogonal to the vehicle width direction, and the both side portions. A side sill structure of a vehicle in which a reinforcing body for reinforcing the side sill is incorporated in a side sill having an upper surface portion and a lower surface portion that respectively form a corner portion with the side surface portion of the vehicle, and is separated in the longitudinal direction of the vehicle body. A plurality of first reinforcement bodies having partition walls attached to the side sill and corresponding to the coupling portions with a plurality of cross members extending in the vehicle width direction and partitioning the inside of the side sill in the longitudinal direction of the vehicle body. A second reinforcing body that extends in the longitudinal direction of the vehicle body and is attached to the inside of the side sill inside the corner between the side surface and the bottom surface of the side sill on the outer side in the vehicle width direction. Reinforcing body and front And a second reinforcing member is coupled, characterized in that.

  Further, the invention according to claim 2 of the present application is the invention according to claim 1, wherein the second reinforcing body is the vehicle body rearmost side from the first reinforcing body on the vehicle body front side among the plurality of first reinforcement bodies. Extending to the first reinforcement body.

  Further, the invention according to claim 3 of the present application is the invention according to claim 1 or claim 2, wherein the first reinforcing member is a joint portion with three cross members that are spaced apart in the longitudinal direction of the vehicle body. There are three corresponding to the above.

  Still further, the invention according to claim 4 of the present application is the invention according to any one of claims 1 to 3, wherein the first reinforcing body has a vehicle width corresponding to the shape of the second reinforcing body. A cutout portion cut out inward in the direction is provided, and the second reinforcement body extends in the vehicle longitudinal direction through the cutout portion of the first reinforcement body, and the first reinforcement is formed in the cutout portion of the first reinforcement body. It is combined with the body.

  Still further, the invention according to claim 5 of the present application is the invention according to any one of claims 1 to 4, wherein the second reinforcing body is spaced from the side sill in a corner portion of the side sill. A base portion extending along the inner surface; and a side sill formed integrally with the base portion and arranged in a longitudinal direction of the side sill and an orthogonal cross-sectional direction orthogonal to the longitudinal direction, and projecting from the base toward the side sill And a plurality of convex portions that come into contact with each other.

  Furthermore, the invention according to claim 6 of the present application is the invention according to any one of claims 3 to 5, in the front side and the rear side of the vehicle body of the connecting portion with the center pillar extending in the vertical direction of the vehicle body. The third reinforcing body and the fourth reinforcing body are further provided with a third reinforcing body and a fourth reinforcing body, each of which is mounted in the side sill in the vicinity of the coupling portion and has a partition wall section that divides the inside of the side sill in the vehicle longitudinal direction. The body is arranged between the three first reinforcing bodies.

  According to the invention of claim 1 of the present application, the plurality of first reinforcing bodies including the partition portions that divide the inside of the side sill in the longitudinal direction of the vehicle body corresponding to the coupling portions with the plurality of cross members in the side sill are attached. Since the second reinforcing body is attached to the inside of the corner portion between the side surface portion and the lower surface portion of the side sill on the outer side in the vehicle width direction, and the first reinforcing body and the second reinforcing body are coupled, the side sill When a load is applied from the outside to the cross member, the cross-section deformation of the side sill at the joint with the cross member is suppressed to transmit the load to the cross member, and the corner portion of the side sill is prevented from buckling and the cross-section deformation. It is possible to suppress the bending deformation of the side sill in the vehicle width direction inward, and to increase the bending strength of the side sill while suppressing an increase in weight. Further, by suppressing the increase in weight, the fuel efficiency is improved, and the energy saving effect can be enhanced.

  Furthermore, in the side sill disposed at the lower part of the vehicle body, for example, in the case of a side collision, a load is applied from the outside and a torsional deformation can occur with the deformation of the pillar coupled to the side sill in the vehicle width direction inner side. By reinforcing the corners of the side sill, the cross-sectional deformation of the side sill can be effectively suppressed.

  According to the invention of claim 2 of the present application, the second reinforcing body extends from the first reinforcing body on the front side of the vehicle body to the first reinforcing body on the rear side of the vehicle body among the plurality of first reinforcing bodies. Accordingly, when a load is applied to the side sill from the outside, the load can be transmitted and dispersed in the longitudinal direction of the side sill, and the effect can be more effectively achieved.

  Further, according to the invention according to claim 3 of the present application, the three first reinforcing bodies are provided corresponding to the coupling portions with the three cross members that are spaced apart in the longitudinal direction of the vehicle body. Thus, the effect can be realized more specifically.

  Furthermore, according to the invention according to claim 4 of the present application, the first reinforcing body is provided with a notch that is notched inward in the vehicle width direction corresponding to the shape of the second reinforcing body. The reinforcing body extends in the longitudinal direction of the vehicle body through the notch portion of the first reinforcing body and is coupled to the first reinforcing body at the notch portion of the first reinforcing body, thereby realizing the effect more specifically. .

  Still further, according to the invention according to claim 5 of the present application, the second reinforcing body is integrally formed with the base portion extending along the inner surface of the corner portion of the side sill in a state of being separated from the side sill. It is arranged in the longitudinal direction of the side sill and in the orthogonal cross-sectional direction orthogonal to the longitudinal direction, and has a plurality of convex portions protruding from the base toward the side sill and coming into contact with the side sill. Since the closed cross section can be formed between the side sill and the base to effectively reinforce the corner of the side sill, the deformation of the corner can be more effectively suppressed when a load is applied from the outside. it can.

  Furthermore, according to the invention according to claim 6 of the present application, the partition portion that divides the inside of the side sill in the longitudinal direction of the vehicle body in the vicinity of the coupling portion on the vehicle body front side and the vehicle body rear side of the coupling portion with the center pillar in the side sill. The third reinforcing body and the fourth reinforcing body are disposed, and the third reinforcing body and the fourth reinforcing body are disposed between the three first reinforcing bodies, whereby the third reinforcing body and the fourth reinforcing body are provided. The cross-sectional deformation of the side sill between the three first reinforcing bodies can be suppressed by the body, and the above effect can be more effectively achieved.

  In addition, the side sill can be effectively reinforced by the partition wall in the vicinity of the joint portion of the side sill center pillar where the cross-sectional deformation is likely to occur due to the bending moment generated when the torsional load is applied to the vehicle body. When acting, the bending deformation of the side sill can be suppressed and the torsional rigidity of the vehicle body can be improved, and the above-described effects can be achieved more effectively.

It is a side view which shows roughly the vehicle body provided with the side sill to which the side sill structure which concerns on embodiment of this invention is applied. It is a bottom view which shows the principal part of the said vehicle body roughly. It is a perspective view which shows the side sill of the said vehicle body. It is a disassembled perspective view of the side sill shown in FIG. It is sectional drawing along the Y5-Y5 line | wire in FIG. FIG. 4 is a sectional view taken along line Y6-Y6 in FIG. It is a perspective view which expands and shows the principal part of the side sill shown in FIG. It is a perspective view which shows the reinforcement body incorporated in the coupling | bond part with the cross member of the side sill shown in FIG. It is sectional drawing of the side sill along the Y9a-Y9a line in FIG. 7, and the Y9b-Y9b line. It is a principal part enlarged view which expands and shows the principal part of the side sill shown in FIG. It is sectional drawing along the Y11a-Y11a line | wire and Y11b-Y11b line | wire in FIG. It is sectional drawing along the Y12a-Y12a line in FIG. 10, and the Y12b-Y12b line. It is explanatory drawing for demonstrating the arrangement | sequence of the convex part of the reinforcement body attached inside the corner | angular part between the outer surface part and lower surface part of a side sill. It is explanatory drawing for demonstrating another reinforcement body attached to the inner side of the corner | angular part between the outer surface part and lower surface part of a side sill. It is a perspective view which shows the reinforcement body incorporated in the coupling | bond part vicinity with the front pillar of the side sill shown in FIG. It is the figure which cut | disconnected the reinforcement body shown in FIG. 15 in the cross section along the Y16a-Y16a line and the Y16b-Y16b line. It is sectional drawing of the side sill along the Y17-Y17 line | wire in FIG. It is sectional drawing of the side sill along the Y18-Y18 line | wire in FIG. It is sectional drawing of the side sill along the Y19-Y19 line | wire in FIG. It is a graph which shows the relationship between the stroke of the barrier which adds a load to this vehicle body, the reaction force with respect to this load, and the amount of energy absorption about the vehicle body provided with the side sill structure which applied the side sill structure which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, terms that mean a specific direction such as “up”, “down”, “right”, “left” and other terms including those terms are used. In order to facilitate understanding of the referenced invention, the technical scope of the present invention is not limited by the meaning of these terms.

  FIG. 1 is a side view schematically showing a vehicle body provided with a side sill to which a side sill structure according to an embodiment of the present invention is applied, FIG. 2 is a bottom view schematically showing a main part of the vehicle body, and FIG. 4 is an exploded perspective view of the side sill shown in FIG. 3, FIG. 5 is a sectional view taken along line Y5-Y5 in FIG. 3, and FIG. 6 is Y6-Y6 in FIG. It is sectional drawing along a line. In addition, in FIG. 4, the reinforcement body incorporated in the side sill is abbreviate | omitted and shown.

  As shown in FIGS. 1 and 2, a vehicle body 1 to which a vehicle side sill structure according to an embodiment of the present invention is applied is a vehicle body of a four-door type passenger vehicle, and includes a vehicle body floor portion 2 that constitutes a bottom surface of the vehicle body, And a vehicle body side surface portion 10 constituting a side surface of the vehicle body. In the present embodiment, the vehicle body side surface portion 10 on the left side of the vehicle body is described, but the vehicle body side surface portion on the right side of the vehicle body is configured in the same manner.

  The vehicle body floor portion 2 includes a plate-like floor panel 3, and the first cross member 4 and the second cross are arranged on the floor panel 3 from the front side of the vehicle body that is separated in the vehicle longitudinal direction and extends in the vehicle width direction. A member 5 and a third cross member 6 are provided. Each of these cross members 4, 5, 6 is coupled to the side sill 30.

  The vehicle body side surface portion 10 is positioned on the vehicle body front side of the front door opening portion 12 in the vehicle body front-rear direction with the roof side rail 11 extending in the vehicle body front-rear direction at the upper portion of the vehicle body, the side sill 30 extending in the vehicle body front-rear direction at the lower portion of the vehicle body. A front pillar 15 that extends, a center pillar 20 that is positioned between the front and rear door openings 12 and 13 and extends in the vertical direction of the vehicle body; and a rear pillar 25 that is positioned on the rear side of the vehicle body of the rear door opening 13 and includes a side sill. A front pillar 15, a center pillar 20, and a rear pillar 25 are coupled to 30.

  The side sill 30 is also coupled with three cross members 4, 5, 6, and the first cross member 4 is coupled at a substantially intermediate position between the front pillar 15 and the center pillar 20 in the longitudinal direction of the vehicle body. The member 5 is coupled at substantially the same position as the center pillar 20 in the longitudinal direction of the vehicle body, and the third cross member 6 is coupled at a substantially intermediate position between the center pillar 20 and the rear pillar 25 in the longitudinal direction of the vehicle body.

  As will be described later, in the side sill 30 according to the present embodiment, the reinforcing bodies 40, 60, 50 for reinforcing the side sill 30 correspond to the joint portions 7, 8, 9 with the cross members 4, 5, 6, respectively. Built in the side sill 30. Further, a reinforcing body 70 for reinforcing the side sill 30 is attached to the side sill 30 in the side sill 30 inside the corner between the side surface portion and the lower surface portion on the outer side in the vehicle width direction of the side sill 30. .

  FIG. 7 is an enlarged perspective view showing a main part of the side sill shown in FIG. 3, FIG. 8 is a perspective view showing a reinforcing body built in a joint portion with the cross member of the side sill shown in FIG. 7, and FIG. FIG. 9A is a cross-sectional view of the side sill along the lines Y9a-Y9a and Y9b-Y9b in FIG. 7, FIG. 9A is a cross-sectional view along the Y9a-Y9a line, and FIG. 9B is a Y9b-Y9 line. FIG. In FIG. 7, the side sill and the center pillar are indicated by a two-dot chain line in order to clearly show the reinforcing body incorporated in the side sill, and this is shown in a transmissive state.

  As shown in FIG. 9A, the side sill 30 is positioned on the inner side in the vehicle width direction, forms a part of the inner surface of the vehicle body and extends in the vehicle longitudinal direction, and the vehicle width direction outer side. And a side sill outer 32 which constitutes a part of the outer surface of the vehicle body and extends in the vehicle body front-rear direction.

  Specifically, the side sill inner 31 includes an upper surface portion 31a extending in a substantially horizontal direction, a lower surface portion 31b facing the upper surface portion 31a and positioned below the upper surface portion 31a, extending in a substantially horizontal direction, and a lower surface portion 31b. And a side surface portion 31c extending in a substantially vertical direction to the upper surface portion 31a. The side surface portion 31c bulges inwardly in the vehicle width direction (the vehicle interior on the left side in FIG. 9).

  The side sill inner 31 also has an upper flange portion 31d extending upward from the upper surface portion 31a at the outer end in the vehicle width direction of the upper surface portion 31a, and a lower surface portion at the outer end in the vehicle width direction of the lower surface portion 31b. A lower flange portion 31e extending downward from 31b is formed, and the side sill inner 31 is formed in a substantially hat-shaped cross section.

  On the other hand, the side sill outer 32 has an upper surface portion 32a extending in a substantially horizontal direction, a lower surface portion 32b facing the upper surface portion 32a and positioned below the upper surface portion 32a, extending in a substantially horizontal direction, and an upper surface portion 32a from the lower surface portion 32b. And a side surface portion 32c extending in a substantially vertical direction until the side surface portion 32c bulges outward in the vehicle width direction (the vehicle outer side which is the right side in FIG. 9).

  The side sill outer 32 also has an upper flange portion 32d extending upward from the upper surface portion 32a at the inner end in the vehicle width direction of the upper surface portion 32a, and a lower surface portion 32b at the inner end in the vehicle width direction of the lower surface portion 32b. A lower flange portion 32e extending downward is formed, and the side sill outer 32 is formed in a substantially hat-shaped cross section.

  The side sill inner 31 and the side sill outer 32 are joined to each other at the upper flange portions 31d and 32d and the lower flange portions 31e and 32e are joined to each other, whereby the side sill 30 is formed in a closed cross-sectional shape. . The side sill inner 31 and the side sill outer 32 can each be formed by pressing a metal plate material such as a steel plate.

  In the side sill 30 thus formed, a corner 30a is formed between the upper surface portion 31a and the side surface portion 31c of the side sill inner 31, and between the lower surface portion 31b and the side surface portion 31c of the side sill inner 31. A corner portion 30b is formed between the upper surface portion 32a and the side surface portion 32c of the side sill outer 32, and a corner portion 30d is formed between the lower surface portion 32b and the side surface portion 32c of the side sill outer 32. The side sill 30 is formed in a substantially rectangular closed cross section.

  In the following, the side surface portion 31c of the side sill inner 31 is appropriately represented as an inner side surface portion 31c that is a side surface portion on the inner side in the vehicle width direction of the side sill 30, and the side surface portion 32c of the side sill outer 32 is outward in the vehicle width direction of the side sill 30. The upper surface portion 31a of the side sill inner 31 and the upper surface portion 32a of the side sill outer 32 are represented as upper surface portions 31a and 32a of the side sill 30, and the lower surface portion 31b of the side sill inner 31 and the side sill outer 32 The lower surface portion 32b is represented as the lower surface portions 31b and 32b of the side sill 30.

  The front pillar 15 coupled to the side sill 30 transmits a torsional load input to the vehicle body 1 from a mounting portion between the suspension device for suspending the wheel and the vehicle body 1 during traveling, and transmits the load to the side sill 30. Can be communicated. When a torsional load is input to the vehicle body 1 from a mounting portion between the suspension device for suspending the wheel and the vehicle body 1 during traveling, the rotational axis of the bending moment is set to the side sill 30 due to the torsional load in the vehicle width direction. As a result, a bending moment is generated.

  The front pillar 15 is formed in a closed cross-sectional shape by a front pillar inner 16 positioned on the inner side of the vehicle and a front pillar outer 17 positioned on the outer side of the vehicle, and the front pillar inner 16 is connected to the side sill 30 at the joint 18 with the side sill 30. In particular, the front pillar outer 17 extends between the side sill inner 31 and the side sill outer 32 and the front pillar outer 17 is disposed outside the side sill outer 32.

  At the joint 18 between the side sill 30 and the front pillar 15, the front pillar inner 16 divides the closed cross-section S 1 inside the side sill 30 formed by the side sill inner 31 and the side sill outer 32 into the vehicle interior and vehicle exterior. Accordingly, as shown in FIG. 5, the side sill inner 31 and the front pillar inner 16 form a closed cross-sectional portion S2 having a substantially cross-sectional rectangular shape, and the side sill outer 32 and the front pillar inner 16 have a substantially cross-sectional rectangular shape. A closed cross section S3 having a shape is formed.

  As shown in FIGS. 4 and 5, the length in the vertical direction of the vehicle body is formed short on the vehicle body front side of the side surface portion 32c of the side sill outer 32. Specifically, the closed cross-section S3 includes the side sill outer 32 and The front pillar outer 17 and the front pillar inner 16 are formed in a closed cross section.

  The center pillar 20 coupled to the side sill 30 is formed in a closed cross section by a center pillar inner 21 located on the inner side of the vehicle and a center pillar outer 22 located on the outer side of the vehicle. 23, the center pillar inner 21 extends in the side sill 30, specifically, between the side sill inner 31 and the side sill outer 32, and the center pillar outer 22 is disposed outside the side sill outer 32. It has been.

  In the joint portion 23 between the side sill 30 and the center pillar 20, the center pillar inner 21 divides the closed cross-section S1 inside the side sill 30 formed by the side sill inner 31 and the side sill outer 32 into the vehicle inside and the vehicle outside. Accordingly, as shown in FIG. 6, the side sill inner 31 and the center pillar inner 21 form a closed cross section S4 having a substantially cross-sectional rectangular shape, and the side sill outer 32 and the center pillar inner 21 have a substantially cross-sectional rectangular shape. A closed cross section S5 having a shape is formed.

  In the side sill 30 according to the present embodiment, reinforcing bodies (first reinforcing bodies) 40, 60, and 50 are disposed in the side sill 30 at the joint portions 7, 8, and 9 with the cross members 4, 5, and 6, respectively. . Of the three cross members 4, 5, 6, the reinforcing body 40 attached in the side sill 30 in the joint portion 7 with the cross member 4 on the most front side of the vehicle body is, as shown in FIGS. A plate-shaped partition wall 41 that divides the inside of the side sill 30 in the longitudinal direction of the vehicle body, and a plate-shaped peripheral wall portion 42 that extends in the longitudinal direction of the vehicle body, covers the periphery of the partition wall 41, and is coupled to the partition wall 41. I have.

  As shown in FIG. 9, the partition wall 41 has an outer shape corresponding to the inner surface shape of the side sill 30, and is formed so as to extend in an orthogonal cross-sectional direction orthogonal to the longitudinal direction of the side sill 30. The partition wall 41 is also provided with a plurality of plate-like ribs 43 extending from the partition wall 41 to the front side of the vehicle body and the rear side of the vehicle body.

  As shown in FIG. 9, the peripheral wall portion 42 also has an outer shape corresponding to the inner surface shape of the side sill 30, and is coupled to the side sill 30 by an adhesive 27. In addition, in order to attach the reinforcing body 70 disposed inside the corner portion 30d between the outer side surface portion 32c and the lower surface portions 31b and 32b of the side sill 30, which will be described later, the reinforcing body 40 has a shape of the reinforcing body 70. Correspondingly, a cutout portion 44 having a substantially L-shaped cross section cut out on the vehicle inner side is formed, and the reinforcing body 70 is coupled to the reinforcing body 40 by the adhesive 27 at the cutout portion 44 of the reinforcing body 40.

  Further, the reinforcing body 50 attached in the side sill 30 at the joint portion 9 with the cross member 6 on the rearmost side of the vehicle body among the three cross members 4, 5, 6 is configured in the same manner as the first reinforcing body 40. A partition portion that divides the interior of the side sill in the longitudinal direction of the vehicle body, and a peripheral wall portion that is coupled to the partition portion, and is formed with a notch portion that is notched to the inside of the vehicle corresponding to the shape of the reinforcing body 70 The body 70 is coupled to the reinforcing body 50 by the adhesive 27 at the cutout portion of the reinforcing body 50.

  On the other hand, the reinforcing body 60 attached in the side sill 30 in the joint portion 8 with the cross member 5 is configured in substantially the same manner as the reinforcing body 50, and has a partition portion that divides the inside of the side sill 30 in the longitudinal direction of the vehicle body. Since the center pillar inner 21 extends in the side sill 30 at the connecting portion 8 with the cross member 5, the center pillar inner 21 is constituted by two divided reinforcing bodies 61 and 66 divided in the vehicle width direction.

  The split reinforcement body 61 located on the vehicle inner side is disposed in the closed cross section S4 on the vehicle inner side of the side sill 30 partitioned by the center pillar inner 21 in the vehicle width direction, and divides the inside of the side sill 30 in the vehicle longitudinal direction. A plate-shaped partition wall portion 62 and a plate-shaped peripheral wall portion 63 that extends in the longitudinal direction of the vehicle body, covers the periphery of the partition wall portion 62, and is coupled to the partition wall portion 62 are provided. The center pillar inner 21 and the side sill inner 31 are coupled to each other.

  Further, the divided reinforcing body 66 located on the vehicle outer side is disposed in the closed cross-sectional portion S5 on the vehicle outer side inside the side sill 30 divided by the center pillar inner 21 in the vehicle width direction, and the inside of the side sill 30 extends in the vehicle longitudinal direction. And a plate-shaped peripheral wall portion 68 that extends in the longitudinal direction of the vehicle body, covers the periphery of the partition wall portion 67, and is coupled to the partition wall portion 67. The peripheral wall portion 68 is provided with the adhesive 27. The center pillar inner 21 and the side sill outer 32 are coupled to each other.

  The reinforcing body 60 also corresponds to the shape of the reinforcing body 70 in order to attach the reinforcing body 70 disposed inside the corner portion 30d between the outer side surface portion 32c and the lower surface portions 31b and 32b of the side sill 30 described later. A cutout 69 having a substantially L-shaped cross-section cut out on the vehicle inner side is formed, and the reinforcing body 70 is formed of the reinforcing body 60, specifically, the divided reinforcing body 66 by the adhesive 27 in the cutout 69 of the reinforcing body 60. Combined with.

  In this way, the side sill 30 is disposed in the side sill 30 so as to correspond to the connecting portions 7, 8, 9 with the plurality of cross members 4, 5, 6 that are spaced apart in the vehicle longitudinal direction and extend in the vehicle width direction. Reinforcing bodies 40, 60, 50 mounted inside are disposed, and the reinforcing bodies 40, 60, 50 have partition portions 41, 62, 67 that divide the inside of the side sill 30 in the longitudinal direction of the vehicle body. As a result, when a load is applied to the side sill 30 from the outside, the cross-section deformation of the side sill 30 at the joints 7, 8, 9 with the cross members 4, 5, 6 is suppressed, and the load is applied to the cross members 4, 5, 6. Can communicate. The reinforcing bodies 40, 50 and 60 can be obtained by molding a resin material by injection molding or the like.

  In the present embodiment, the side sill 30 is also provided with a corner 30d between the outer side surface 32c of the side sill 30 and the lower surface portions 31b and 32b, specifically, an angle between the side surface portion 32c and the lower surface portion 32b of the side sill outer 32. A reinforcing body (second reinforcing body) 70 is attached to the inside of the portion 30d. The reinforcing body 70 extends in the front-rear direction of the vehicle body, and is the most forward side of the vehicle body among the plurality of reinforcing bodies 40, 60, 50 attached to the side sill 30 at the joint portions 7, 8, 9 with the cross members 4, 5, 6. It extends so that it may extend from the reinforcement body 40 of this to the reinforcement body 50 of the vehicle body rear side most. The reinforcing body 70 can be formed by pressing a metal plate material such as a steel plate.

  10 is an enlarged view of the main part of the side sill shown in FIG. 7, and FIG. 11 is a cross-sectional view taken along lines Y11a-Y11a and Y11b-Y11b in FIG. ) Is a cross-sectional view taken along line Y11a-Y11a, FIG. 11B is a cross-sectional view taken along line Y11b-Y11b, and FIG. 12 is a cross-sectional view taken along lines Y12a-Y12a and Y12b-Y12b in FIG. 12A is a cross-sectional view taken along the line Y12a-Y12a, and FIG. 12B is a cross-sectional view taken along the line Y12b-Y12b.

  The reinforcing body 70 is formed integrally with the base 71 and extends along the inner surface of the corner 30d of the side sill 30 in a state of being separated from the side sill 30, and the longitudinal direction of the side sill 30 and orthogonal to the longitudinal direction. A plurality of convex portions 72 that are arranged in a direction (orthogonal cross-sectional direction) and project from the base portion 71 toward the side sill 30 and are formed in a quadrangular pyramid shape.

  FIG. 13 is an explanatory view for explaining the arrangement of the convex portions of the reinforcing body attached to the inside of the corner portion between the outer side surface portion and the lower surface portion of the side sill, and is a front view showing the main part of the reinforcing body 70. It is. As shown in FIG. 13, the plurality of convex portions 72 are formed in a quadrangular frustum shape having a top surface portion 72 a having a quadrangular shape, and are periodically arranged in the longitudinal direction and the orthogonal cross-sectional direction of the side sill 30.

  Each of the plurality of convex portions 72 is arranged such that the square diagonal line of the top surface portion 72a is substantially parallel to the longitudinal direction and the orthogonal cross-sectional direction of the side sill 30, and the convex portions 72 adjacent to each other in the longitudinal direction of the side sill 30 are side sill 30. Of the side sill 30 and adjacent convex portions 72 in the direction of the orthogonal cross section of the side sill 30 overlap each other in the longitudinal direction of the side sill 30.

  As shown in FIG. 13, for the convex portion denoted by reference numeral 72, the convex portion 72A adjacent to the convex portion 72 in the longitudinal direction of the side sill 30 has an overlap L1 in the orthogonal cross-sectional direction of the side sill 30, and The convex portions 72B adjacent to each other in the orthogonal cross-sectional direction overlap each other in the longitudinal direction of the side sill 30 and have L2.

  Thereby, in the reinforcing body 70, the groove part 75 is formed between the convex part 72 by the adjacent convex part 72, and specifically, the groove part 75 is formed by the side surface part 72b and the base part 71 of the adjacent convex part 72. The groove 75 is formed in a mesh shape inclined at a predetermined angle with respect to the longitudinal direction of the side sill 30, 45 degrees in this embodiment. In this way, in the reinforcing body 70, as shown in FIG. 10, the plurality of convex portions 72 are provided so that the base portions 71 that are linearly continuous in the longitudinal direction and the orthogonal cross-sectional direction of the side sill 30 are not formed. .

  Moreover, as shown in FIG.11 and FIG.12, the some convex part 72 is formed in the height H1 of the convex part 72 from the base 71 with the substantially constant height in the longitudinal direction and orthogonal cross-section direction of the side sill 30, The top surface portion 72 a of the convex portion 72 is in contact with the side surface portion 32 c and the lower surface portion 32 b of the side sill outer 32. Thereby, the base 71 is provided so as to be separated from the side sill 30 by a predetermined distance.

  Further, as shown in FIG. 10, the reinforcing body 70 is formed such that a portion extending along the side surface portion 32 c of the side sill outer 32 and a portion extending along the lower surface portion 32 b of the side sill outer 32 are formed symmetrically. The convex portion 72 facing the ridge line between the side surface portion 32c and the lower surface portion 32b of the side sill outer 32 is in contact with the side surface portion 32c and the lower surface portion 32b of the side sill outer 32, and the top surface portion 72a is curved. Is formed.

  In FIG. 10, in the reinforcing body 70, the convex portion 72 coupled to the side surface portion 32 c of the side sill outer 32 is indicated by a black circle (●). As shown in FIG. 10, the reinforcing body 70 has a convex portion 72 that abuts on the side surface portion 32c of the side sill outer 32 in the vicinity of the ridge line between the side surface portion 32c and the lower surface portion 32b of the side sill outer 32. Combined with.

  Similarly, the reinforcing body 70 also extends along the lower surface portion 32b side of the side sill outer 32, and the lower surface portion 32b of the side sill outer 32 near the ridge line between the side surface portion 32c and the lower surface portion 32b of the side sill outer 32. A convex portion 72 that contacts with the lower surface portion 32b is coupled. The reinforcing body 70 and the side sill 30 can be coupled by spot welding or the like.

  The reinforcing body 70 is also provided so that both end portions of the side sill 30 in the orthogonal cross-sectional direction are separated from the side sill 30. As shown in FIG. 11B, one end 73a in the cross-sectional direction of the side sill 30 is provided so as to be separated from the side surface 32c while being inclined at a predetermined angle from the side surface 32c of the side sill outer 32. As shown in FIG. 11 (a), it is provided so as to be farther from the side sill 30 than the base 71.

  Similarly, the other end portion 73b of the side sill 30 in the orthogonal cross-sectional direction is separated from the lower surface portion 32b while being inclined at a predetermined angle from the lower surface portion 32b of the side sill outer 32, as shown in FIG. As shown in FIG. 11 (a), it is provided so as to be farther from the side sill 30 than the base 71.

  As described above, the reinforcing plate 70 is formed so that the end portions 73a and 73b of the reinforcing body 70 in the orthogonal cross-sectional direction of the side sill 30 are separated from the side sill 30, so that the reinforcing body in the orthogonal cross-sectional direction of the side sill 30 is provided. Compared with the case where the end of 70 is in contact with the side sill 30, deformation in the longitudinal direction of the side sill 30 can be suppressed, and the bending strength of the side sill 30 can be improved.

  In this way, the reinforcing body 70 is attached to the side sill 30 inside the corner portion 30d between the outer side surface portion 32c of the side sill 30 and the lower surface portions 31b and 32b. Thereby, it is possible to prevent the corner portion 30d of the side sill 30 from buckling and deforming in cross section when a load is applied to the side sill 30 from the outside.

  As described above, the reinforcing bodies 40, 50, 60 are provided with the notches 44, 69 cut out on the vehicle interior side corresponding to the shape of the reinforcing body 70, and the reinforcing body 70 is provided with the notches 44. , 69 extends in the front-rear direction of the vehicle body and is coupled to the reinforcing bodies 40, 50, 60 through the adhesive 27 at the notches 44, 69.

  Further, the reinforcing body 70 extends from the reinforcing body 40 on the most front side of the vehicle body to the reinforcing body 50 on the rear side of the vehicle body among the reinforcing bodies 40, 50, 60, so that a load is applied to the side sill 30 from the outside. The load can be transmitted and dispersed in the longitudinal direction of the side sill 30.

  Further, the reinforcing body 70 is separated from the side sill 30 and extends along the inner surface of the corner portion 30d of the side sill 30, and the base 71 is formed integrally with the longitudinal direction of the side sill 30 and the orthogonal cross-sectional direction. And a plurality of convex portions 72 that protrude from the base portion 71 toward the side sill 30 and come into contact with the side sill 30, so that the side sill 30 is located between the side sill 30 and the base portion 71 in the longitudinal direction and the orthogonal cross-sectional direction. The side sill 30 and the groove 75 can form a closed cross section to effectively reinforce the corner 30d of the side sill 30, so that the deformation of the corner 30d can be more effectively suppressed when a load is applied from the outside. Can do.

  In addition, it replaces with the reinforcement body 70 as a reinforcement body attached inside the corner | angular part 30d between the outer side surface part 32c of the side sill 30, and the lower surface parts 31b and 32b in the side sill 30, and the board formed in the cross-sectional substantially L shape. It is also possible to use a reinforcing member formed in the shape of a pipe or a pipe.

  FIG. 14 is an explanatory diagram for explaining another reinforcing body attached to the inside of the corner portion between the outer surface portion and the lower surface portion of the side sill, and shows a cross section corresponding to FIG. 9 of the side sill 30. . As shown in FIG. 14, instead of the reinforcing body 70, a rectangular cylinder shape is formed in the side sill 30 on the inner side of the corner portion 30 d between the outer side surface portion 32 c and the lower surface portions 31 b and 32 b of the side sill 30. It is also possible to attach the reinforcing body 75.

  Even in such a case, the reinforcing bodies 40, 50, 60 are each provided with a notch 44 ′ cut out on the vehicle interior side corresponding to the shape of the reinforcing body 75, and the reinforcing body 75 passes through the notch 44 ′. It extends in the longitudinal direction of the vehicle body and is coupled to the reinforcing bodies 40, 50, 60 via the adhesive 27 at the notch 44 ′.

  The side sill 30 also incorporates reinforcing bodies 80 and 90 for reinforcing the side sill 30 in the vicinity of the joint portion 23 of the side sill 30 with the center pillar 20. In the joint portion 23 of the side sill 30 with the center pillar 20, the center pillar inner 21 extends into the side sill 30, and the reinforcing bodies 80 and 90 are respectively located on the vehicle body front side of the joint portion 23 with the center pillar 20 in the side sill 30. In the side sill 30, more specifically, in the vicinity of the coupling portion 23 near the front side 21a of the center pillar inner 21 and the rear end portion 21b of the center pillar inner 21 at the rear side of the vehicle body. ing.

  A reinforcing body (third reinforcing body) 80 and a reinforcing body (fourth reinforcing body) 90 attached to the inside of the side sill 30 in the vicinity of the coupling portion 23 on the vehicle body front side and vehicle body rear side of the coupling portion 23 with the center pillar 20, respectively. As shown in FIG. 2, the joints 7, 8, 9 with the cross members 4, 5, 6 are disposed between the three reinforcing bodies 40, 60, 50 attached in the side sill 30. That is, the reinforcing body 80 is disposed between the reinforcing body 40 and the reinforcing body 60 in the longitudinal direction of the vehicle body, and the reinforcing body 90 is disposed between the reinforcing body 60 and the reinforcing body 50 in the longitudinal direction of the vehicle body. .

  The reinforcing bodies 80 and 90 are both configured in the same manner as the reinforcing body 40, and include a partition wall portion that divides the inside of the side sill 30 in the longitudinal direction of the vehicle body, and a peripheral wall portion coupled to the partition wall portion. Correspondingly, a cutout portion cut out on the inner side of the vehicle is formed. The reinforcing body 70 is coupled to the reinforcing bodies 80 and 90 by the adhesive 27 at the cutout portions of the reinforcing bodies 80 and 90.

  As described above, the reinforcing bodies 80 and 90 having the partition portions that divide the inside of the side sill 30 in the longitudinal direction of the vehicle body in the vicinity of the coupling portion 23 on the vehicle body front side and vehicle body rear side of the coupling portion 23 with the center pillar 20 in the side sill 30. And the reinforcing bodies 80 and 90 are disposed between the three reinforcing bodies 40, 60 and 50, so that the reinforcing bodies 80 and 90 are provided between the three reinforcing bodies 40, 60 and 50. Cross-sectional deformation of the side sill 30 can be suppressed.

  Further, since the side sill 30 can be effectively reinforced by the partition wall in the vicinity of the connecting portion 23 of the side sill 30 and the center pillar 20 that is likely to be deformed by a bending moment generated when a torsional load is applied to the vehicle body 1, When a torsional load is applied to the vehicle body 1, bending deformation of the side sill 30 can be suppressed and the torsional rigidity of the vehicle body can be improved.

  The side sill 30 further incorporates a reinforcing body 100 in the vicinity of the joint 18 with the front pillar 15. 15 is a perspective view showing a reinforcing body built in the vicinity of the joint portion of the side sill shown in FIG. 3 with the front pillar, and FIG. 16 shows the reinforcing body shown in FIG. 15 along the lines Y16a-Y16a and Y16b-Y16b. FIG. 16A is a cross-sectional view taken along the line Y16a-Y16a, FIG. 16B is a cross-sectional view taken along the line Y16a-Y16a, and FIG. Is a cross-sectional view of the side sill along line Y17-Y17 in FIG. 3, FIG. 18 is a cross-sectional view of the side sill along line Y18-Y18 in FIG. 3, and FIG. 19 is along the line Y19-Y19 in FIG. It is sectional drawing of a side sill.

  As shown in FIG. 16, the reinforcing body 100 includes a plate-like S-shaped portion 101 formed in an S shape in an orthogonal cross section orthogonal to the longitudinal direction of the side sill 30, and an orthogonal cross section orthogonal to the longitudinal direction of the side sill 30. A plate-like inverted S-shaped portion 102 formed in an inverted S-shape and a plate extending in the vehicle width direction, which is an orthogonal cross-sectional direction orthogonal to the longitudinal direction of the side sill 30, and dividing the inside of the side sill 30 in the longitudinal direction of the vehicle body And a partition wall 103 having a shape.

  As shown in FIGS. 16A and 17, the S-shaped portion 101 extends in the vehicle width direction substantially along the upper surface portions 31a and 32a of the side sill 30, and the upper surface portion 31a, An upper surface joint portion 101a that is in contact with and joined to 32a; an upper surface joint portion 101a extending downward substantially along the inner side surface portion 31c side of the side sill 30 at the corner portion 30a from the vehicle width direction inner end portion of the upper surface joint portion 101a. And an inner side surface joint portion (first inner side surface joint portion) 101b that is joined in contact with the inner side surface portion 31c side of the corner portion 30a via the adhesive 27.

  Further, the S-shaped portion 101 extends in the vehicle width direction substantially along the lower surface portions 31 b and 32 b of the side sill 30, and contacts the lower surface portions 31 b and 32 b via the adhesive 27 and is bonded thereto. 101c and an outer end in the vehicle width direction of the lower surface joint portion 101c extend upward substantially along the outer surface portion 32c side of the side sill 30 in the corner portion 30d, and are continuously connected to the lower surface joint portion 101c via the adhesive 27 through the corners. It has an outer surface bonding portion (second outer surface bonding portion) 101d that is bonded in contact with the outer surface portion 32c side of the portion 30d.

  Further, the S-shaped portion 101 includes a first connecting portion 101e that connects the inner side surface connecting portion 101b and the outer side surface connecting portion 101d. The first connecting portion 101e is formed so as to incline downward as it goes from the vehicle interior to the vehicle exterior, and so that the separation distance from the upper surface joint portion 101a increases from the vehicle interior to the vehicle exterior. It is formed so that the distance from the lower surface joint portion 101c increases as it goes toward the vehicle interior side.

  The S-shaped portion 101 also includes an inner surface non-contact portion 101f that does not contact the inner surface portion 31c of the side sill 30, and an outer surface non-contact portion 101g that does not contact the outer surface portion 32c of the side sill 30. .

  On the other hand, as shown in FIGS. 16B and 18, the inverted S-shaped portion 102 extends in the vehicle width direction substantially along the upper surface portions 31 a and 32 a of the side sill 30, and the upper surface via the adhesive 27. An upper surface joint portion 102a joined in contact with the portions 31a and 32a, and an upper surface extending from the outer end in the vehicle width direction of the upper surface joint portion 102a substantially along the outer surface portion 32c side of the side sill 30 at the corner portion 30c. It has the outer side surface joint part (1st outer side surface junction part) 102b contact | abutted and joined to the outer side surface part 32c side in the corner | angular part 30c through the adhesive agent 27 continuously from the junction part 102a.

  Further, the inverted S-shaped portion 102 extends in the vehicle width direction substantially along the lower surface portions 31b and 32b of the side sill 30, and is bonded to the lower surface portions 31b and 32b through the adhesive 27 and bonded thereto. Part 102c and an inner end portion of the lower surface joint portion 102c in the vehicle width direction and extending upward substantially along the inner side surface portion 31c side of the side sill 30 at the corner portion 30b, and continuously to the upper joint portion 102c via the adhesive 27 It has an inner side surface joining portion (second inner side surface joining portion) 102d that is brought into contact with and joined to the inner side surface portion 31c side of the corner portion 30b.

  Further, the inverted S-shaped portion 102 has a second connecting portion 102e that connects the inner surface joint portion 102d and the outer surface joint portion 102b. The second connecting portion 102e is formed so as to incline downward as it goes from the outside of the vehicle toward the inside of the vehicle, and to increase the distance from the upper surface joint portion 102a as it goes from the outside of the vehicle toward the inside of the vehicle. It is formed so that the separation distance from the lower surface joint portion 102c increases as it goes to the vehicle outer side.

  The inverted S-shaped portion 102 also includes an inner surface non-contact portion 102f that does not contact the inner surface portion 31c of the side sill 30, and an outer surface non-contact portion 102g that does not contact the outer surface portion 32c of the side sill 30. Yes.

  Further, as shown in FIGS. 16 and 18, the partition wall portion 103 has an outer shape corresponding to the inner surface shape of the side sill 30 with the adhesive 27 interposed therebetween, and is formed to extend in the orthogonal cross-sectional direction of the side sill 30. Yes. In FIG. 16, the S-shaped portion 101, the inverted S-shaped portion 102, and the partition wall portion 103 are shown separated by a two-dot chain line for the sake of clarity.

  The reinforcing body 100 includes a plurality of S-shaped portions 101, inverted S-shaped portions 102, and partition walls 103, and the S-shaped portions 101 and the inverted S-shaped portions 102 are arranged in the longitudinal direction of the side sill 30. They are alternately arranged in the longitudinal direction of the vehicle body via partition walls 103. Further, in the reinforcing body 100, the S-shaped portion 101, the inverted S-shaped portion 102, and the partition wall 103 are integrally formed. The reinforcing body 100 can be obtained by molding a resin material by injection molding or the like.

  In this way, in the reinforcing body 100, the first inner side surface joint portion 101b and the second inner side surface joint portion 102d are provided so as not to overlap in the longitudinal direction of the side sill 30, and the first outer side surface joint is provided. The portion 102 b and the second outer surface joint portion 101 d are provided so as not to overlap with the longitudinal direction of the side sill 30.

  Further, the reinforcing body 100 is provided so as not to be joined to the outer surface portion 102c in a region where the inner surface joint portions 101b and 102d are projected on the outer surface portion 32c of the side sill 30 in the direction of the rotation axis M of the bending moment. 101d and 102b are provided so as not to be joined to the inner side surface portion 31c in the region projected on the inner side surface portion 31c of the side sill 30 in the direction of the rotation axis M of the bending moment.

  Further, in the reinforcing body 100, the first connecting portion 101e is formed such that the distance from the upper surface joint portion 101a increases toward the outer side surface portion 32c from the inner side surface portion 31c of the side sill 30, and the inner side from the outer side surface portion 32c. The distance from the lower surface bonding portion 101c increases toward the surface portion 31c, and the second connecting portion 102e is separated from the upper surface bonding portion 102a from the outer surface portion 32c of the side sill 30 toward the inner surface portion 31c. Is formed so that the distance between the inner surface 31c and the outer surface 32c increases. Thereby, when shape | molding using the shaping | molding die, such as the case where it shape | molds the reinforcement body 100, for example by injection molding, the die cutting at the time of shaping | molding can be performed easily.

  As shown in FIGS. 3 and 15, the reinforcing body 100 also closes the outside of the vehicle inside the side sill 30 defined by the front pillar inner 16 at the joint 18 between the side sill 30 and the front pillar 15. A length in the vehicle width direction is formed short on the front side of the vehicle body so as to be disposed in the cross section S3.

  Similarly, the reinforcing body 100 includes a plate-like S-shaped portion 101 formed in an S shape in an orthogonal cross section orthogonal to the longitudinal direction of the side sill 30 in a portion disposed on the front side of the vehicle body, and the side sill 30. A plate-like inverted S-shaped portion 102 formed in an inverted S-shape in an orthogonal cross section orthogonal to the longitudinal direction, and extends in the vehicle width direction, which is the orthogonal cross-sectional direction of the side sill 30, specifically inside the side sill 30, specifically A plate-shaped partition wall portion 103 that divides the closed cross-section S3 inside the side sill 30 in the vehicle longitudinal direction, and the S-shaped portion 101 and the inverted S-shaped portion 102 are the longitudinal direction of the side sill 30 in the vehicle longitudinal direction. Are arranged alternately with the partition walls 103 interposed therebetween.

  FIG. 5 shows the inverted S-shaped portion 102 of the reinforcing body 100 built in the side sill 30 at the joint 18 with the front pillar 15. As shown in FIG. 5, as shown in FIG. Then, the inverted S-shaped portion 102 includes an upper surface bonding portion 102a, an outer surface bonding portion (first outer surface bonding portion) 102b, a lower surface bonding portion 102c, and an inner surface bonding portion (second surface) in the closed cross section S3. Inner side surface joining portion) 102d and second connecting portion 102e are formed in an inverted S shape in a cross section orthogonal to the longitudinal direction of side sill 30.

  However, the upper surface bonding portion 102a is bonded to the upper surface portion 32a of the side sill outer 32, and the outer surface bonding portion 102b is bonded to the side surface portion 32c side of the corner portion 30c between the upper surface portion 32a and the side surface portion 32c of the side sill outer 32. The joint portion 102 c is joined to the lower surface portion 17 a extending in the substantially horizontal direction of the front pillar outer 17, and the inner side surface joint portion 102 d is on the front pillar 16 side at the corner between the lower surface portion 17 a of the front pillar outer 17 and the front pillar inner 16. It is joined.

  Although not shown, the S-shaped portion 101 is also formed in an S shape in a cross section orthogonal to the longitudinal direction of the side sill 30 in the closed cross section S3 also on the vehicle body front side of the reinforcing body 100, and the partition wall The portion 103 is formed to extend in the vehicle width direction, which is an orthogonal cross-sectional direction orthogonal to the longitudinal direction of the side sill 30.

  In this way, the side sill 30 is provided with the reinforcing body 100 in the side sill 30 in the vicinity of the coupling portion 18 on the vehicle body rear side of the coupling portion 18 with the front pillar 15. Has a partition wall portion 103 that divides the vehicle body in the longitudinal direction of the vehicle body. Thereby, the side sill 30 can be effectively reinforced by the partition wall portion 103 in the vicinity of the joint portion 18 of the side sill 30 where the cross-sectional deformation easily occurs due to a bending moment generated when a torsional load is applied to the vehicle body 1. Therefore, when the torsional load is applied to the vehicle body 1, the bending deformation of the side sill 30 can be suppressed and the torsional rigidity of the vehicle body can be improved.

  As described above, according to the side sill structure of the vehicle according to the present embodiment, the interior of the side sill 30 corresponds to the joint portions 7, 8, 9 with the plurality of cross members 4, 5, 6 in the side sill 30. A plurality of first reinforcing bodies 40, 60, 50 having partition walls 41, 62, 69 that divide in the front-rear direction are attached, and the side surface portion 32 c on the outer side in the vehicle width direction of the side sill 30 and the lower surface portions 31 b, 32 b A second reinforcing body 70 is attached to the inside of the corner 30d between the first reinforcing bodies 40, 60, 50 and the second reinforcing body 70.

  As a result, when a load is applied to the side sill 30 from the outside, the cross-section deformation of the side sill 30 at the joints 7, 8, 9 with the cross members 4, 5, 6 is suppressed, and the load is applied to the cross members 4, 5, 6. It is possible to prevent the corner portion 30d of the side sill 30 from buckling and deforming its cross-section, and to suppress the bending deformation of the side sill 30 toward the inner side in the vehicle width direction, while suppressing an increase in weight. The bending strength can be increased. Further, by suppressing the increase in weight, the fuel efficiency is improved, and the energy saving effect can be enhanced.

  Further, in the side sill 30 disposed in the lower part of the vehicle body, for example, in the case of a side collision, a load is applied from the outside and the pillars 15, 20, 25 coupled to the side sill 30 are deformed inward in the vehicle width direction. Although torsional deformation may occur, cross-sectional deformation of the side sill 30 can be effectively suppressed by reinforcing the corners 30d of the side sill 30.

  In the present embodiment, the side collision performance of the vehicle body 1 including the side sill 30 to which the side sill structure according to the embodiment of the present invention is applied is evaluated by simulation analysis. In this analysis, the reinforcing body 100 is removed and the vehicle body 1 including the side sill 30 incorporating the reinforcing bodies 40, 50, 60, 70, 80, 90 is used as an example, and the reinforcing body 40 of the side sill 30 from the vehicle body of the example is used. , 50, 60, 70, 80, 90 were used as comparative examples for evaluation.

  Specifically, a barrier as an indenter was pressed from the side of the vehicle body with a load F on a vehicle body provided with a side sill, and a reaction force F ′ with respect to the barrier load F and an energy absorption amount EA were evaluated. The energy absorption amount EA is energy that can be absorbed by the vehicle body, and is represented by the product of the reaction force F ′ against the load F and the stroke of the barrier.

  FIG. 20 is a graph showing a relationship between a stroke of a barrier that applies a load to the vehicle body, a reaction force against the load, and an energy absorption amount for a vehicle body having a side sill to which the side sill structure according to the embodiment of the present invention is applied. In FIG. 20, the stroke from the position where the barrier is in contact with the vehicle body is taken on the horizontal axis, the reaction force F ′ against the barrier load is shown on the left vertical axis, and the energy absorption amount EA is shown on the right vertical axis. . In FIG. 20, the analysis result of the example is indicated by a solid line, and the analysis result of the comparative example is indicated by a broken line.

  As shown in FIG. 20, in both the example and the comparative example, when the barrier stroke increases, the reaction force F ′ against the barrier load increases and the energy absorption amount EA increases. In comparison, the reaction force F ′ with respect to the load on the barrier is increased, and the energy absorption amount EA is increased.

  As described above, the reinforcing members 40, 60, 50 are attached to the connecting portions 7, 8, 9 with the cross members 4, 5, 6 in the side sill 30, and between the outer side surface portion 32c and the lower surface portions 31b, 32b of the side sill 30. The reinforcing body 70 is attached to the inside of the corner portion 30d of the slab, and the reinforcing bodies 80 and 90 are attached to the vehicle body front side and the vehicle body rear side of the coupling portion 23 with the center pillar 20 in the side sill 30, thereby increasing the weight. The bending strength of the side sill can be increased while suppressing.

  In addition, as the adhesive 27 in this embodiment, for example, a sheet-like thermosetting adhesive having a predetermined thickness that foams when heated to a predetermined temperature can be used. Attached to 40, 50, 60, 80, 90, 100 and then foamed by heating to a predetermined temperature and filled between the side sill 30 and the reinforcing bodies 40, 50, 60, 80, 90, 100. Can be combined.

  As for the adhesive 27 used when the reinforcing bodies 40, 50, 60, 80, 90 and the reinforcing body 70 are joined, a sheet-like thermosetting adhesive having a predetermined thickness that foams when heated to a predetermined temperature. The adhesive is attached to the notches 44 and 69 of the reinforcing plates 40, 50, 60, 80, and 90 before foaming, and is then foamed by heating to a predetermined temperature, whereby the reinforcing bodies 40 and 50 are used. , 60, 80, 90 and the reinforcing body 70 can be filled and bonded.

  Further, when a sheet-like thermosetting adhesive is used as the adhesive 27 used when the reinforcing bodies 40, 50, 60, 80, 90 and the reinforcing body 70 are joined, the reinforcing bodies 40, 50, 60 are used. It is preferable to form the sheet-like adhesive 27 in a concavo-convex shape so as to correspond to the concavo-convex shape of the reinforcing body 70 so that the expansion ratio of the adhesive 27 attached to 80, 90 is constant.

  Instead of this, a sheet-like thermosetting adhesive having a predetermined thickness is used as the adhesive 27 used when the reinforcing bodies 40, 50, 60, 80, 90 and the reinforcing body 70 are joined together. The notches 44 of the reinforcing plates 40, 50, 60, 80, 90 correspond to the concavo-convex shape of the reinforcing body 70 so that the expansion ratio of the adhesive 27 attached to 40, 50, 60, 80, 90 is constant. It is also possible to form 69 in an uneven shape.

  In the present embodiment, the first reinforcing bodies 40, 60, 50 and the third reinforcing body 80 or the fourth reinforcing body 90 are configured separately, but the first reinforcing bodies 40, 60, 50 are crossed. Depending on the positions of the members 4, 5, 6, the third reinforcing body 80 or the fourth reinforcing body 90 may be formed integrally.

  As described above, the present invention is not limited to the illustrated embodiments, and it goes without saying that various improvements and design changes can be made without departing from the gist of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can provide a vehicle side sill structure capable of increasing the bending strength of a side sill while suppressing an increase in weight, and is widely used in a vehicle body in which a reinforcing body for reinforcing the side sill is incorporated in the side sill. There is a possibility that.

DESCRIPTION OF SYMBOLS 1 Vehicle body 4, 5, 6 Cross member 20 Center pillar 30 Side sill 30a, 30b, 30c, 30d Corner | angular part 31a, 32a Upper surface part 31b, 32b Lower surface part 31c, 32c Side surface part 40, 50, 60, 70, 80, 90, 100 Reinforcing body 41, 91, 96 Partition 44, 69 Notch 71 Base 72 Convex

Claims (6)

A corner portion is formed between the side surface portions on both sides extending in the longitudinal direction of the vehicle body in the lower portion of the vehicle body and extending in the direction orthogonal to the vehicle width direction, and the side surface portions on both sides. A side sill structure of a vehicle in which a reinforcing body for reinforcing the side sill is built in a side sill having an upper surface portion and a lower surface portion,
A plurality of partition walls that are disposed in the side sill and are separated from each other in the vehicle front-rear direction and are attached to the side sill in correspondence with joint portions with a plurality of cross members extending in the vehicle width direction, and partition the interior of the side sill in the vehicle front-rear direction. A first reinforcing body of
A second reinforcing body that extends in the longitudinal direction of the vehicle body and is attached to the inside of the side sill inside the corner between the side surface and the lower surface of the side sill in the vehicle width direction,
With
The first reinforcing body and the second reinforcing body are coupled;
A vehicle side sill structure characterized by that. The second reinforcing body extends from the first reinforcing body on the front side of the vehicle body to the first reinforcing body on the rear side of the vehicle body among the plurality of first reinforcing bodies,
The side sill structure for a vehicle according to claim 1. The three first reinforcing bodies are provided corresponding to the joint portions with the three cross members that are spaced apart in the longitudinal direction of the vehicle body.
The side sill structure for a vehicle according to claim 1 or 2, wherein the vehicle has a side sill structure. The first reinforcing body is provided with a notch portion that is notched inward in the vehicle width direction corresponding to the shape of the second reinforcing body,
The second reinforcing body extends in the front-rear direction of the vehicle body through the notch portion of the first reinforcing body and is coupled to the first reinforcing body at the notch portion of the first reinforcing body.
The side sill structure for a vehicle according to any one of claims 1 to 3, wherein the side sill structure is a vehicle. The second reinforcement body is formed integrally with the base portion that extends along the inner surface of the corner portion of the side sill in a state of being separated from the side sill, and is formed integrally with the base portion and orthogonal to the longitudinal direction of the side sill. A plurality of convex portions that are arranged in an orthogonal cross-sectional direction and project from the base portion toward the side sill and come into contact with the side sill,
The vehicle side sill structure according to any one of claims 1 to 4, wherein the vehicle side sill structure is provided. A third reinforcement having a partition wall portion that is attached to the side sill in the vicinity of the coupling portion on the vehicle body front side and vehicle body rear side of the coupling portion with the center pillar extending in the vertical direction of the vehicle body, and partitions the inside of the side sill in the vehicle longitudinal direction. A body and a fourth reinforcing body,
The third reinforcing body and the fourth reinforcing body are disposed between the three first reinforcing bodies,
The vehicle side sill structure according to any one of claims 3 to 5, wherein the vehicle side sill structure is provided.

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