JP2018114918A - Vehicle body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body structure that is able to support the load of a lower rail by improving the rigidity of a side sill.SOLUTION: A side sill 2 comprises a box-shaped lower rail accommodating part 5 for accommodating a lower rail 4 of a slide door 3. The lower rail accommodating part 5 is formed in a bag shape by projecting part of a vehicle front side toward a floor panel 19. On an upper surface of the lower rail accommodating part 5, a lower rail 4, over which a guide roller of the slide door 3 slides, is laid. A reinforcing member 10 is provided between a side sill outer part 12 and a side sill inner part 13. In the reinforcing member 10, an upper part 10h is joined to a lower part of a center pillar 7, and upper and lower joint parts 11a, 11b are joined to upper and lower flange parts 12a, 12b, respectively, of the side sill outer part 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle body structure.

As a conventional vehicle body structure, there is known a structure in which a lower rail storage portion in which a lower rail of a slide door is stored is provided inside a side sill.
In such a thing, the bracket which supports the load of a lower rail is provided. The upper end of the bracket is connected to the lower surface side of the lower rail housing part. The lower end of the bracket is connected to the lower side sill.

JP 2010-23632 A

In the conventional vehicle body structure, in order to support the load of the lower rail, a bracket that supports the lower rail storage portion is provided on the lower surface side of the lower rail storage portion.
For this reason, there has been a problem that it hardly contributes to improving the rigidity of the side sill.
An object of the present invention is to provide a vehicle body structure capable of supporting the load of the lower rail by improving the rigidity of the side sill.

  The present invention includes a side sill that extends along the longitudinal direction of the vehicle in the longitudinal direction, a lower rail storage part that is provided on the side sill and that stores a lower rail of a sliding door, and a reinforcing member that reinforces the side sill, The vehicle body structure is characterized in that the flange portion of the reinforcing member is overlapped and joined to the wall portion of the storage portion in the vehicle front-rear direction.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle body structure which can improve the rigidity of a side sill and can support the load of a lower rail is provided.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially broken perspective view showing an overall configuration of a vehicle with a vehicle body structure according to an embodiment of the present invention. It is the perspective view which looked at the center pillar lower part from the vehicle body inner side in the vehicle body structure of embodiment. FIG. 3 is a perspective view of the lower part of the center pillar viewed from the inside of the vehicle body at the same angle as in FIG. 2 in the vehicle body structure of the comparative example. It is the side view which looked at the junction part of the lower rail storage part and reinforcement member in a center pillar lower part from the vehicle outside in the body structure of an embodiment. FIG. 5 is a cross-sectional view of the lower portion of the center pillar at a position along the line VV in FIG. 4. FIG. 6 is a cross-sectional view of a position along the line VI-VI in FIG. 4 at the lower part of the center pillar. It is the perspective view which looked at the center pillar lower part from the vehicle interior side diagonally upward. It is the side view which looked at the preassembled state before attaching to a side sill inner in the lower part of a center pillar from the vehicle interior side. It is sectional drawing in the position along the IX-IX line | wire in FIG. 8 which shows the structure of a rear part under a center pillar. It is a typical longitudinal cross-sectional view which shows a mode that the center pillar of a pre-assembled state is welded.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate. The same components are denoted by the same reference numerals, and redundant description is omitted. When describing the directions, unless otherwise indicated, the description will be basically based on the front, rear, left, right, top and bottom viewed from the driver. Further, “vehicle width direction” is synonymous with “left-right direction”.

As shown in FIGS. 1 and 2, a pair of side sills 2 extend along the longitudinal direction in the vehicle front-rear direction below the left and right sides of the vehicle 1 of this embodiment. Of these, the left side sill 2 constitutes the lower edge of the door opening 1a of the rear seat 1b.
The door opening 1a is provided with a sliding door 3 that slides along the extending direction of the side sill 2 to open and close the door opening 1a.

The side sill 2 of the vehicle 1 of this embodiment includes a lower rail storage portion 5 having a box-shaped cross section for storing the lower rail 4 of the slide door 3 (see FIG. 6).
As shown in FIG. 6, the lower rail housing 5 is formed in a bag shape by opening the outside of the vehicle to form an opening 5 a and projecting a part of the front side toward the lower side of the floor panel 19 located in the vehicle interior. Is formed.
A lower rail 4 of the slide door 3 is laid on the upper side of the inner side surface of the lower rail storage portion 5. A guide roller (not shown) rolls along the lower rail 4 so that the slide door 3 slides in the vehicle front-rear direction to open and close the opening 5a.

The side sill 2 includes a side sill outer 12 and a side sill inner 13 (see FIG. 5). The side sill outer 12 and the side sill inner 13 are configured to be substantially hollow box-shaped in cross section in the vehicle width direction by being joined in the vehicle width direction.
Further, a center pillar 7 is erected upward from the side sill 2. The center pillar 7 includes a pillar outer 17 and a pillar inner 18. The pillar outer 17 and the pillar inner 18 are configured to have a substantially hollow box shape in a horizontal section by being joined in the vehicle width direction.
Of these, a reinforcing member 10 for reinforcing the side sill 2 is provided between the side sill outer 12 and the side sill inner 13 (see FIGS. 2 and 4).

As shown in FIG. 8, the reinforcing member 10 is formed of a panel-shaped member having a substantially trapezoidal shape when viewed from the front.
The reinforcing member 10 is formed with a bead 10b that extends in the longitudinal direction in the vertical direction.
A plurality of beads 10b, four in this embodiment, are provided at predetermined intervals, and are arranged substantially in parallel so that the longitudinal direction is along the vertical direction.
FIG. 9 is a cross-sectional view at the position along the line IX-IX in FIG. 8 showing the configuration of the rear part below the center pillar.
As shown in FIG. 9, each bead 10b of the reinforcing member 10 is formed so as to bulge to the side sill inner 13 side which is the vehicle interior side. Thereby, the reinforcing member 10 can obtain desired rigidity in the in-plane / outside direction.

Further, the reinforcing member 10 is formed with an opening portion 10c between the plurality of pairs of beads 10b and 10b, along the longitudinal direction in the vertical direction. A bridge portion 10d that connects the pair of beads 10b and 10b to each other is formed in the middle portion in the longitudinal direction of the opening 10c.
Thereby, the reinforcement member 10 can maintain rigidity by the bridge | bridging part 10d, aiming at weight reduction by the thickness reduction of the opening part 10c.

  Further, the reinforcing member 10 has a work hole 10 a formed in the vicinity of the joint portion 100 with the lower rail housing portion 5. As shown in FIG. 10, the work hole 10 a is formed in a size that allows the welding torch 200 to be inserted when the side sill outer 12 is connected to the pillar outer 17.

As shown in FIG. 2, the reinforcing member 10 has upper and lower joint portions 11 a and 11 b joined to upper and lower flange portions 12 a and 12 b of the side sill outer 12. Further, in this embodiment, the upper portion 10 h of the reinforcing member 10 is joined to the lower portion of the pillar outer 17 of the center pillar 7.
As a result, the upper and lower flange portions 12a and 12b of the side sill outer 12 are suppressed from being deformed in the vertical direction, and the rigidity against the side collision can be improved.

Further, the reinforcing member 10 is integrally formed with a flange portion 11 at a side edge portion on the vehicle rear side. The flange part 11 is formed so as to be substantially L-shaped in a horizontal section. The flange portion 11 is overlapped with the front wall portion 6 of the lower rail storage portion 5 in the vehicle front-rear direction and joined at the joint portion 100.
As a result, the lower rail storage portion 5 can transmit the load of the stored lower rail 4 to the side sill 2 while being supported by the reinforcing member 10. For this reason, it is not necessary to separately provide a bracket or the like for supporting the lower rail housing portion 5.

FIG. 3 is a perspective view of the lower body of the center pillar 7 as viewed from the inside of the vehicle body at the same angle as that of FIG.
In the vehicle body structure of this comparative example, the pillar inner 113 is integrally formed with an extension 113a that extends downward. The extension 113a is joined to the lower flange 2b of the side sill 2 in the vehicle width direction.
Furthermore, in the vehicle body structure of the comparative example, a reinforcing member 115 that supports the lower rail housing part 5 from below is provided. The upper end of the reinforcing member 115 is connected to the lower surface side of the lower rail housing part 5. The lower end of the reinforcing member 115 is joined to the lower flange portion 2b of the side sill 2 in the vehicle width direction.

In the vehicle body structure of the comparative example configured as described above, a reinforcing member 115 that supports the lower rail housing portion 5 is separately provided on the lower surface side of the lower rail housing portion 5 in order to support the load of the lower rail 4.
However, there is a problem that the reinforcing member 115 only supports the lower rail housing portion 5 and hardly contributes to improving the rigidity of the side sill 2.
Further, the extension 113a of the pillar inner 113 is joined to the lower flange portion 2b of the side sill 2 in the vehicle width direction.
For this reason, the shape of the pillar inner 113 becomes complicated, and the yield is not good.

On the other hand, as shown in FIG. 2, the reinforcing member 10 of the vehicle body structure of the present invention is provided separately and independently from the lower part of the center pillar 7 erected upward from the side sill 2. ing.
In this embodiment, the reinforcing member 10 is provided at a connecting portion between the center pillar 7 and the side sill 2. The upper portion 10h of the reinforcing member 10 is overlapped and joined to the pillar outer 17 of the center pillar 7 in the vehicle width direction.
For this reason, the connection part of the center pillar 7 and the side sill 2 is reinforced by the reinforcing member 10, and desired strength can be obtained.

Also, as shown in FIG. 4, the shape of the pillar outer 17 is made to have a good yield compared to the shape in which the extension 113a (see FIG. 3) is integrally provided as in the comparative example. Can do.
Furthermore, in this embodiment, the reinforcing member 10 is formed in a substantially trapezoidal shape when viewed from the front. For this reason, compared with the reinforcing member 115 of the comparative example, the degree of freedom in molding is high and the strength is easily improved.

Next, the assembly process of the vehicle body structure of this embodiment will be described with reference mainly to FIG.
As shown in FIG. 7, the reinforcing member 10 and the lower rail housing portion 5 are configured as a pre-assembled unit 20 that is assembled to the side sill 2 in a state of being integrally joined.
In the pre-assembled unit 20 of this embodiment, the reinforcing member 10 and the lower rail storage portion 5 are assembled in advance to the pillar outer 17 constituting the center pillar 7 and the side sill outer 12 constituting the side sill 2.

At the time of pre-assembly, when the working hole 10a formed in the vicinity of the joint portion 100 with the lower rail housing portion 5 connects the side sill outer 12 to the pillar outer 17 as shown in FIG. The welding torch 200 is formed in a size that can be inserted.
For this reason, even if the reinforcement member 10 is joined to the pre-assembly unit 20 side where pre-assembly is performed, the welding torch 200 can be inserted through the work hole 10a.
Therefore, workability such as connecting the side sill outer 12 to the pillar outer 17 can be ensured, and the degree of freedom in the assembly order can be improved.

  Furthermore, in this embodiment, even if the reinforcing member 10 and the lower rail storage portion 5 that needs to be supported are integrally joined in the vehicle front-rear direction, workability for joining other parts is ensured. Can do.

For this reason, the reinforcing member 10 and the lower rail accommodating part 5 can be assembled | attached previously, and can be comprised as the pre-assembled unit 20 assembled | attached to the side sill 2 in the state joined integrally.
Therefore, the assembling workability is improved as compared with the case where the reinforcing member 10 and the lower rail storage portion 5 are separately assembled.

FIG. 7 is a perspective view of the lower portion of the center pillar 7 as viewed from the obliquely upward side of the vehicle interior.
In the vehicle body structure of this embodiment, the pillar outer 17 constituting the center pillar 7, the side sill outer 12 constituting the side sill 2, and the reinforcing member 10 are overlapped and joined to each other. Further, the vehicle body side has a second joint point 102 where the pillar inner 18 constituting the center pillar 7 and the side sill inner 13 constituting the side sill 2 are overlapped and joined.

Then, as shown by a one-dot chain line in FIG. 7, the first joint point 101 and the second joint point 102 are overlapped in the vehicle width direction by applying the pre-assembly unit 20 in the vehicle width direction from the outside of the vehicle body. Arranged.
For this reason, as shown by the solid line in FIG. 7, in the joined state, the first joint point 101 and the second joint point 102 are overlapped and arranged in the vehicle width direction. For this reason, the intensity | strength of the whole junction part of the center pillar 7 and the side sill 2 can be improved.

  The vehicle body structure according to this embodiment is basically configured as described above. Next, the function and effect of the vehicle body structure will be described.

The vehicle 1 of this embodiment includes a side sill 2 that extends in the longitudinal direction in the front-rear direction, a lower rail storage portion 5 that is provided on the side sill 2 and that stores the lower rail 4 of the slide door 3, and the side sill 2 is reinforced. The reinforcing member 10 is provided.
As shown in FIG. 2, the flange portion 11 of the reinforcing member 10 is overlapped in the vehicle front-rear direction and joined to the wall portion 6 at the front end of the lower rail housing portion 5 by the joint portion 100.

In the vehicle body structure of the embodiment thus configured, the reinforcing member 10 reinforces the side sill 2.
Thereby, the rigidity with respect to a side collision can be improved.
In this embodiment, the upper and lower joint portions 11 a and 11 b of the reinforcing member 10 are further joined to the upper and lower flange portions 12 a and 12 b of the side sill outer 12.
Thereby, the vertical deformation of the upper and lower flange portions 12a and 12b of the side sill outer 12 is suppressed.

The lower rail storage 5 supports the load of the stored lower rail 4 with the reinforcing member 10. For this reason, it is not necessary to separately provide a bracket or the like for supporting the lower rail housing portion 5.
Further, a flange portion 11 is overlapped from the front side in the vehicle front-rear direction and joined to the wall portion 6 at the front end of the lower rail housing portion 5 facing in the front-rear direction by a joint portion 100.
For this reason, in addition to the joining between the side sill outer 12 and the side sill inner 13 in the left and right directions, a multi-directional joining direction can be secured. Therefore, the rigidity against side collision can be further improved.

  The center pillar 7 is provided so as to stand upward from the side sill 2, and the reinforcing member 10 is provided at a connecting portion between the center pillar 7 and the side sill 2. The reinforcing member 10 is separate from the center pillar 7 and is overlapped and joined to the center pillar 7 at the upper part.

  For this reason, the connection part of the center pillar 7 and the side sill 2 is connected by the reinforcing member 10. Therefore, a desired strength can be obtained.

In this embodiment, the upper part 10 h of the reinforcing member 10 is joined to the lower part of the center pillar 7. For this reason, the joint part of the center pillar 7 and the side sill 2 is reinforced by the reinforcing member 10, and rigidity can be improved.
In addition, the shape of the pillar outer 17 can be made to have a good yield as compared with the case in which the extension 113a is integrally provided as in the comparative example.

The pillar outer 17 constituting the center pillar 7 and the side sill outer 12 constituting the side sill 2 and the reinforcing member 10 are overlapped and joined, and the pillar inner 18 and the side sill 2 constituting the center pillar 7 are constituted. It has the 2nd junction point 102 with which the side sill inner 13 is overlapped and joined.
And the 1st junction point 101 and the 2nd junction point 102 are piled up and arranged in the vehicle width direction. For this reason, the intensity | strength of the whole junction part of the center pillar 7 and the side sill 2 can be improved.

A working hole 10 a is formed in the reinforcing member 10 in the vicinity of the joint portion 100 with the lower rail housing portion 5.
As shown in FIG. 10, the work hole 10 a is formed in a size that allows the welding torch 200 to be inserted when the side sill outer 12 is connected to the pillar outer 17. For this reason, it becomes possible to work without interfering with other members, and the degree of freedom of the assembly order can be improved.

In addition, the reinforcing member 10 and the lower rail storage portion 5 are configured as a pre-assembled unit 20 that is assembled to the side sill 2 in a state of being integrally joined.
For this reason, the reinforcing member 10 and the lower rail accommodating part 5 can be assembled | attached previously, and assembly workability | operativity is favorable.

The reinforcing member 10 is formed with a bead 10b that extends in the longitudinal direction in the vertical direction.
The bead 10b can improve the rigidity of the reinforcing member 10 in the in-plane direction. Thereby, the reinforcing member 10 can obtain desired rigidity.

Furthermore, the reinforcing member 10 is formed with an opening 10c that extends in the longitudinal direction in the vertical direction. A bridge portion 10d is formed at an intermediate portion in the longitudinal direction of the opening 10c.
Thereby, the reinforcing member 10 can obtain desired rigidity by the bridge portion 10d while reducing the weight by reducing the thickness of the opening 10c.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. The above-described embodiments are illustrated for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Further, it is possible to delete a part of the configuration of each embodiment, or to add or replace another configuration. Possible modifications to the above embodiment are as follows, for example.

  In the vehicle body structure of this embodiment, the upper part 10h of the reinforcing member 10 is joined to the lower part of the center pillar 7. However, the present invention is not limited to this, and the reinforcing member 10 and the center pillar 7 may be independent.

In the vehicle body structure of this embodiment, the wall portion 6 at the front end of the lower rail storage portion 5 facing in the front-rear direction faces the vehicle front, and the flange portion 11 is overlapped in the vehicle front-rear direction from the front and joined by the joint portion 100. It has been shown and described.
However, for example, a case where the present invention is applied to a door that is opened by sliding toward the front of the vehicle 1 is also included. In such a case, the wall portion 6 at the front end of the lower rail housing portion 5 may face the vehicle rear, and the flange portion 11 may be overlapped from the rear in the vehicle front-rear direction and joined by the joint portion 100.
Thus, the joining position of the joining part 100 applied according to the arrangement position of the door and the opening direction is not particularly limited.

  Further, the shape and quantity of the beads 10b of the reinforcing member 10 are not particularly limited to the vehicle 1 of the embodiment. Furthermore, the shape and quantity of the opening 10c are not particularly limited. And the shape and quantity of the bridge | bridging part 10d are not specifically limited.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Side sill 3 Sliding door 4 Lower rail 5 Lower rail accommodating part 6 Wall part 7 Center pillar 10 Reinforcement member 10a Work hole 10b Bead 10c Opening part 10d Bridge part 11 Flange part 11a Joint part 12 Side sill outer 13 Side sill inner 17 Pillar outer 18 Pillar outer 18 Prefabricated unit 100 joint 101 first joint 102 second joint

Claims (7)

A side sill extending along the longitudinal direction in the longitudinal direction of the vehicle;
A lower rail storage portion provided on the side sill for storing the lower rail of the sliding door;
A reinforcing member for reinforcing the side sill,
The flange portion of the reinforcing member is overlapped and joined to the wall portion of the lower rail storage portion in the vehicle front-rear direction.
Body structure characterized by that. A center pillar that is erected upward from the side sill,
The reinforcing member is provided at a connecting portion between the center pillar and the side sill, is separate from the center pillar, and is overlapped and joined to the center pillar at the upper part.
The vehicle body structure according to claim 1. A first outer junction where the pillar outer constituting the center pillar and the side sill outer constituting the side sill and the reinforcing member are overlapped and joined;
A second inner point where a pillar inner constituting the center pillar and a side sill inner constituting the side sill are overlapped and joined;
The vehicle body structure according to claim 2, wherein the first joint point and the second joint point are arranged so as to overlap in the vehicle width direction.   The vehicle body structure according to any one of claims 1 to 3, wherein the reinforcing member has a work hole formed in the vicinity of a joint portion with the lower rail housing portion.   The vehicle body structure according to claim 4, wherein the reinforcing member and the lower rail housing portion are configured as a pre-assembled unit that is assembled to the side sill in a state of being integrally joined.   The vehicle body structure according to any one of claims 1 to 5, wherein the reinforcing member is formed with a bead that extends in a longitudinal direction in a vertical direction.   7. The reinforcing member according to any one of claims 1 to 6, wherein an opening that extends in the longitudinal direction is formed in the reinforcing member, and a bridge is formed in a longitudinal intermediate portion of the opening. The vehicle body structure according to claim 1.

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