JP2014125194A - Vehicle body side part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body side part structure capable of suppressing deformation of a side sill to the cabin side caused by an impact load inputted from a vehicle body lateral direction, and reducing the weight.SOLUTION: In a vehicle body side part structure 10, an upper wall 64 of a floor panel 21 is connected to an inner side wall 44 of an inner panel 41, and a left end part 22b of a cross member 22 is connected to the inner side wall 44. Further, a belt-like plate material 24 is provided on the vehicle body side part structure 10. The belt-like plate material 24 connects a sill lower flange 57 to a floor bottom part 61 of the floor panel 21, and is formed so as to have an approximately linear cross section in the vehicle width direction. Furthermore, the cross member 22 is connected to the upper wall 64 of the floor panel 21.

Description

  The present invention relates to a vehicle body side structure in which an outer portion of a floor panel is connected to a side sill and an end of a cross member is connected to the side sill.

In the vehicle body side structure, the side sill extends in the vehicle longitudinal direction, the cross member provided inside the vehicle width direction of the side sill extends in the vehicle width direction, and the end of the cross member is connected to the side sill It has been known. Further, a center pillar is raised from the side sill of the vehicle body side structure.
According to this vehicle body side structure, when an impact load is input to the center pillar from the side of the vehicle body, the side sill is supported by the cross member, thereby preventing the side sill from being deformed to the vehicle compartment side by the input impact load. (For example, refer to Patent Document 1).

JP 2011-46301 A

Here, when the impact load input to the center pillar is supported by the cross member, a compressive force acts on the cross member. Generally, when supporting a load in the compression direction, it is necessary to ensure a greater strength than when supporting a load in the tensile direction.
For this reason, in the vehicle body side structure of Patent Document 1, in order to increase the strength of the cross member with respect to the compression direction, for example, it is necessary to ensure a large plate thickness dimension, which reduces the weight of the vehicle body side structure. It was an obstacle to plan.

  An object of the present invention is to provide a vehicle body side part structure that can suppress the side sill from being deformed to the vehicle interior side by an impact load input from the side of the vehicle body and can be reduced in weight.

  In the invention according to claim 1, the outer panel and the inner panel forming the side sill are each formed in a substantially hat-shaped cross section, and the side sill is closed by connecting the upper and lower flanges of the outer panel and the upper and lower flanges of the inner panel, respectively. An upper wall formed by bending the outer side of the floor panel upward is connected to the inner side wall of the inner panel, the end of the cross member is connected to the inner side wall, and the cross member extends in the vehicle width direction. A vehicle body side structure that extends, includes a bottom plate of the side sill and a floor bottom of the floor panel, and includes a belt-like plate member that is formed in a substantially straight section in the vehicle width direction and that extends in the vehicle longitudinal direction, The cross member is connected to the upper wall of the floor panel.

  Here, when an impact load is input to the center pillar from the side of the vehicle body, the input impact load is transmitted to the upper part of the side sill, and a load that presses toward the passenger compartment is input to the upper part of the side sill. When a load is input to the upper portion of the side sill, a load that moves the lower portion of the side sill outward in the vehicle width direction acts.

  Therefore, in claim 1, the inner panel (inner bottom or lower flange) and the floor panel (floor bottom) are connected by a strip-shaped plate material, and the strip-shaped plate material is formed in a substantially straight section in the vehicle width direction. .

  According to a second aspect of the present invention, the bottom portion of the side sill is an inner bottom portion of the inner panel, the inner bottom portion is formed in a flat shape, and the floor bottom portion is a flat portion disposed substantially horizontally with respect to the inner bottom portion; And an inclined part inclined upwardly from the flat part toward the upper wall, wherein the inner bottom part and the flat part are connected by the strip-shaped plate material.

  According to a third aspect of the present invention, a sill lower flange is formed on the side sill by joining a lower flange of the outer panel and a lower flange of the inner panel, and the sill lower flange is a bottom portion of the side sill.

  According to a fourth aspect of the present invention, an inner distance between an inner connection portion in which the strip-shaped plate material is connected to the floor panel and a central connection portion in which the upper wall is connected to the inner side wall is set to L1, and the bottom portion of the side sill The outer distance between the outer connecting portion to which the strip-shaped plate member is connected and the central connecting portion is set to L2, and the inner distance L1 and the outer distance L2 are equal.

  Here, by reducing the inner distance L1, the inner connection portion for connecting the strip-shaped plate material to the floor panel can be brought closer to the inner side wall side of the inner panel. Thereby, since the rigidity of a floor panel can be improved by an inner side wall, it can be made hard to generate | occur | produce a vertical vibration on a floor panel.

On the other hand, by reducing the outer distance L2, the outer connecting portion for connecting the belt-like plate material to the side sill can be brought closer to the inner side wall. Since the rigidity of the side sill can be increased, the cross-section of the side sill can be hardly crushed by an impact load (not easily deformed).
When an impact load is input from the side of the vehicle body, a tensile force can be suitably applied to the strip-shaped plate material, and the applied tensile force can be supported by the strip-shaped plate material.
Thereby, it can suppress that a side sill deform | transforms into a vehicle interior.

However, when the inner distance L1 is decreased, the outer distance L2 is increased, and when the outer distance L2 is decreased, the inner distance L1 is increased.
Therefore, in the invention according to claim 4, the inner distance L1 between the inner connecting portion and the central connecting portion and the outer distance L2 between the outer connecting portion and the central connecting portion are made equal.

  A fifth aspect of the present invention is characterized in that the strip-shaped plate member is connected to the floor bottom portion over the entire length of the floor panel in the longitudinal direction of the vehicle body and is formed in a substantially straight section in the vehicle width direction.

Claim 6 includes a side door provided on the outer side in the vehicle width direction of the side sill and on the upper side, and the side door is provided inside and includes a reinforcing door beam extending in the longitudinal direction of the vehicle body,
A beam vertical branch extending from the door beam toward the side sill, the beam vertical branch having a lower end portion disposed above the belt-shaped plate material and facing the belt-shaped plate material in the longitudinal direction of the vehicle body It is arranged at a position.

  A seventh aspect of the present invention is characterized in that the door beam longitudinal branch is disposed at a position where the lower end portion faces the cross member.

  According to an eighth aspect of the present invention, the outer panel and the inner panel of the side sill are formed of a thick plate or a high-strength steel plate having a plate thickness dimension larger than that of the floor panel, and the floor panel is a plate of the outer panel and the inner panel. It is formed of a thin plate having a small thickness dimension.

  A ninth aspect of the present invention is characterized in that the side sill is closed at the front and rear end sections.

  Claim 10 includes a decorative side sill garnish that covers the side sill from the outside of the vehicle, and the side sill has a bag-like portion that forms a rear end portion and closes a cross section of the rear end portion, The connecting portion for connecting the bag-like portion is covered with the side sill garnish.

In the invention which concerns on Claim 1, an inner panel (inner bottom part or lower flange) and the floor panel (floor bottom part) were connected with the strip | belt-shaped board | plate material. Further, this strip-shaped plate material was formed in a substantially linear cross section in the vehicle width direction and extended in the vehicle body front-rear direction.
Here, when an impact load is input from the side of the vehicle body to the center pillar raised from the side sill, the center pillar attempts to rotate toward the passenger compartment side with the side sill as an axis. That is, a bending moment directed toward the passenger compartment (inner side in the vehicle width direction) acts on the side sill.

Therefore, a compressive force acts on the cross member with a load that moves the upper part of the side sill toward the passenger compartment. On the other hand, a tensile force acts on the belt-like plate material with a load that moves the bottom of the side sill to the outside in the vehicle width direction. By supporting the tensile force acting on the belt-like plate material with the belt-like plate material, the compressive force acting on the cross member can be kept small.
As a result, it is possible to suppress the side sill (upper part) from being deformed toward the passenger compartment while keeping the thickness of the cross member small, and to reduce the weight of the cross member.

By the way, when supporting the load of a tension | pulling direction, intensity | strength can be restrained small compared with the case where the load of a compression direction is supported. Furthermore, the strip-shaped plate material is formed in a substantially straight section. Therefore, the plate | board thickness dimension of a strip | belt-shaped board | plate material can be restrained small, and the load of a tension | pulling direction can be supported with a lightweight strip | belt-shaped board | plate material.
Thereby, even if a lighter belt-like plate material is newly provided in the vehicle body side part structure, the vehicle body side part structure can be reduced in weight by reducing the weight of the cross member.
In this way, by connecting the inner panel and the floor panel with the belt-like plate material, the side sill can be prevented from being deformed to the passenger compartment side by the impact load input from the side of the vehicle body, and the weight can be reduced. .

Moreover, the upper wall which bent the outer side part of the floor panel upward was connected to the inner side wall of the inner panel. Therefore, when the floor panel vibrates in the vertical direction, vibration in the vehicle width direction is transmitted to the inner side wall via the upper wall.
The vibration generated in the inner side wall acts as a tensile force on the belt-like plate material having a substantially straight section. As a result, the vibration in the vertical direction acting on the floor panel can be suppressed by the strip-shaped plate material having a small thickness, so that the rigidity of the floor panel can be improved and the noise in the passenger compartment can be reduced.

In the invention which concerns on Claim 2, the inclination part was provided in the floor bottom part, and the inclination part was made to incline in an upward slope toward a top wall from a flat part.
By providing the inclined portion at the floor bottom, the rigidity of the floor panel can be improved. Further, since the water can be guided to the flat portion by the inclined portion, the water can be favorably discharged from the drain hole by forming the drain hole in the flat portion.

Here, by providing the inclined portion at the floor bottom, it is conceivable that when the floor panel vibrates in the vertical direction, the vibration in the vehicle width direction transmitted to the inner side wall increases.
Therefore, the inner bottom portion and the flat portion are connected by a strip-shaped plate material.
As a result, the vibration in the vehicle width direction transmitted to the inner side wall can be suppressed by the belt-shaped plate material, so that the vibration of the floor panel and the noise in the passenger compartment can be reduced.

In the invention which concerns on Claim 3, the strip | belt-shaped board | plate material was connected to the sill lower flange of the side sill. Since the sill lower flange protrudes downward, a strip-shaped plate material can be easily connected (welded) to the sill lower flange.
In addition, it is possible to overlap each lower flange (sill lower flange) of the outer panel and inner panel to connect the lower flange and the belt-like plate material at the same time, thereby further facilitating the connection (welding) work. be able to.

  Furthermore, by overlapping a strip-shaped plate material on the lower flange of the sill, a large thickness dimension can be secured at the overlapped portion. Thereby, the intensity | strength of the junction part of a strip | belt-shaped board | plate material can be ensured still more favorably.

In the invention which concerns on Claim 4, the inner side distance L1 between an inner side connection part and a center connection part and the outer side distance L2 between an outer side connection part and a center connection part were made equivalent.
As a result, it is possible to obtain both effects that it is difficult to generate vertical vibrations on the floor panel and that the side sill is difficult to be deformed to the passenger compartment side.

In the invention which concerns on Claim 5, the strip | belt-shaped board | plate material was connected to the floor bottom part in the full length of the floor panel. Thereby, in the full length of a floor panel (namely, full length of a side sill), the deformation | transformation of the side sill to the vehicle interior by the impact load input from the vehicle body side can be suppressed.
The strip-shaped plate material was a strip having a substantially linear cross section. Thereby, a strip | belt-shaped board | plate material can be easily changed along the shape of a floor bottom part, and manufacture can be facilitated.

In the invention which concerns on Claim 6, the lower end part of the beam vertical branch extended below from the door beam was arrange | positioned in the position which opposes a strip | belt-shaped board | plate material.
Thereby, when an impact load is input to the door beam from the side of the vehicle body, the belt-shaped plate member can suppress the side sill from being deformed into the vehicle interior by the input impact load.

  In the invention which concerns on Claim 7, the lower end part of the door beam vertical branch was made to oppose the cross member. Thereby, when an impact load is input to the door beam from the side of the vehicle body, the input impact load can be supported by the cross member.

In the invention according to claim 8, the side sill is formed of a thick plate having a plate thickness dimension larger than that of the floor panel or a high-strength steel plate. Therefore, since the rigidity of the side sill can be increased, the cross section of the side sill can be hardly crushed by an impact load (deformable).
Therefore, when an impact load is input to the door beam from the side of the vehicle body, a tensile force can be suitably applied to the belt-like plate material, and the applied tensile force can be supported by the belt-like plate material.
Thereby, it can suppress more favorably by a strip | belt-shaped board | plate material that a side sill deform | transforms into a vehicle interior.

In the invention which concerns on Claim 9, each cross section of the side sill (front-end part and rear-end part) was obstruct | occluded. Therefore, since the rigidity of the side sill can be increased, the cross section of the side sill can be hardly crushed by an impact load (deformable).
Therefore, when an impact load is input to the door beam from the side of the vehicle body, a tensile force can be suitably applied to the belt-like plate material, and the applied tensile force can be supported by the belt-like plate material.
Thereby, it can suppress more favorably by a strip | belt-shaped board | plate material that a side sill deform | transforms into a vehicle interior.

In the invention which concerns on Claim 10, it has a bag-like part in the rear-end part of the side sill, and the connection part which connects a bag-like part was covered with the side sill garnish.
Thereby, since the connection part of a bag-shaped part can be hidden so that it cannot be visually recognized from the vehicle outer side, the external appearance property of a vehicle can be improved.

It is a perspective view which shows the vehicle body side part structure of Example 1 which concerns on this invention. FIG. 2 is an exploded cross-sectional view showing the vehicle body side part structure of FIG. 1. It is a side view which shows the vehicle body side part structure of FIG. FIG. 4 is a sectional view taken along line 4-4 of FIG. It is a perspective view which shows the state which looked at the vehicle body side part structure of Example 1 from the vehicle interior. FIG. 3 is a bottom view showing the vehicle body side part structure of the first embodiment. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 1. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 1. It is a figure explaining the example which supports the impact load input from the vehicle body side to the center pillar of Example 1. FIG. It is a figure explaining the example which supports the impact load input from the vehicle body side to the front side door of Example 1. FIG. It is a figure explaining the example which suppresses the vibration of the floor panel of Example 1. FIG. It is sectional drawing which shows the vehicle body side part structure of Example 2 which concerns on this invention. It is sectional drawing which shows the vehicle body side part structure of Example 3 which concerns on this invention.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front (Fr)”, “rear (Rr)”, “left (L)”, and “right (R)” follow the direction seen from the driver.

The vehicle body side structure 10 according to the first embodiment will be described.
As shown in FIGS. 1 and 2, the vehicle body side structure 10 includes a side sill 12 provided on the left and right sides of the vehicle body 11, a center pillar 13 raised upward from a substantially center of the side sill 12 in the vehicle longitudinal direction, A front pillar 14 that rises upward from the front end 12 a of the side sill 12, a roof rail 15 that extends from the front pillar 14 through the center pillar 13 to the rear of the vehicle body, and a front side door that is attached to the side of the vehicle body 11. (Side door) 17 and Rear side door (side door) 18 are included (provided).

  Further, the vehicle body side structure 10 includes a floor panel 21 provided between the left and right side sills 12 (the right side sills are not shown), a cross member 22 extending in the vehicle width direction along the floor panel 21, A strip-shaped plate member 24 (see also FIG. 4) that connects the floor panel 21 to the side sill 12 and a side sill garnish 26 that covers the side sill 12 are included (provided).

  The left and right members constituting the vehicle body side structure 10 are substantially bilaterally symmetric members, and the left and right members are denoted by the same reference numerals and only the left member will be described below.

A front door opening (front vehicle body opening) 28 is formed in the front side portion of the vehicle body 11 by the front half portion 12 b of the side sill 12, the front pillar 14, the center pillar 13, and the front half portion 15 a of the roof rail 15.
The front side door 17 is supported by the front door opening 28 so as to be freely opened and closed, so that the front side door 17 is provided on the outer side in the vehicle width direction of the side sill 12 (front half portion 12a) and above.

As shown in FIG. 3, the front side door 17 includes a reinforcing door beam 33 provided in the interior 31 of the front side door 17 and extending in the longitudinal direction of the vehicle body, and a beam vertical branch 34 extending from the door beam 33 toward the side sill 12. Have
The beam longitudinal branch 34 will be described in detail later.

Returning to FIG. 2, a rear door opening (rear vehicle body opening) 29 is formed at the rear side of the vehicle body 11 at the rear half 12 c of the side sill 12, the center pillar 13, the rear pillar, and the rear half 15 b of the roof rail 15.
The rear side door 18 is supported by the rear door opening 29 so as to be openable and closable, so that the rear side door 18 is provided on the outer side in the vehicle width direction of the side sill 12 (the rear half portion 12c) and above.
Since the rear side door 18 has a similar structure to the front side door 17, detailed description thereof is omitted.

As shown in FIG. 4, the side sill 12 includes an inner panel 41 provided on the vehicle compartment 37 side and an outer panel 42 provided on the vehicle exterior side such that it extends in the longitudinal direction of the vehicle body.
The inner panel 41 and the outer panel 42 are each formed of a high-strength steel plate. By forming the inner panel 41 and the outer panel 42 with a high-strength steel plate, the rigidity of the side sill 12 can be increased.
Here, the high strength steel plate refers to a steel plate having a tensile strength higher than 270 MPa in accordance with the general classification of steel plates for automobiles.

The inner panel 41 includes an inner side wall 44 that faces the vehicle compartment 37, an inner upper part 45 that is bent from the upper end of the inner side wall 44 toward the vehicle outer side 36, and an inner upper flange 46 that projects upward from the outer end of the inner upper part 45. And an inner bottom 47 bent from the lower end of the inner side wall 44 toward the vehicle outer side 36, and an inner lower flange (lower flange) 48 projecting downward from the outer end of the inner bottom 47.
The inner bottom portion 47 is formed in a flat shape.
An inner panel 41 is formed in a substantially hat-shaped cross section by the inner side wall 44, the inner upper portion 45, the inner bottom portion 47, the inner upper flange 46 and the inner lower flange 48.

The outer panel 42 includes an outer side wall 51 that faces the vehicle exterior 36, an outer upper portion 52 that is bent from the upper end of the outer side wall 51 toward the vehicle compartment 37, and an outer upper flange 53 that projects upward from the outer end of the outer upper portion 52. The outer bottom portion 54 is bent from the lower end of the outer side wall 51 toward the vehicle compartment 37, and the outer lower flange (lower flange) 55 projects downward from the outer end of the outer bottom portion 54.
The outer panel 42 is formed in a substantially hat-shaped cross section by the outer side wall 51, the outer upper portion 52, the outer bottom portion 54, the outer upper flange 53, and the outer lower flange 55.

The inner upper flange 46 and the outer upper flange 53 are connected, and the inner lower flange 48 and the outer lower flange 55 are connected to form the side sill 12 in a closed cross section.
Here, the rigidity of the side sill 12 can be improved by forming the side sill 12 with a high-strength steel plate. Thereby, the cross-section of the side sill 12 can be hardly crushed (not easily deformed) by the impact load input from the side of the vehicle body.

As shown in FIG. 2, the front pillar 14 is provided at the front end portion 12 a of the side sill 12, so that the cross section of the front end portion 12 a is closed by the front pillar 14.
Furthermore, by making the rear end portion of the side sill 12 a bag-like portion 12d, the cross section of the rear end portion is closed by the bag-like portion 12d.
Therefore, since the rigidity of the side sill 12 can be increased, the cross section of the side sill 12 can be hardly crushed (not easily deformed) by an impact load input from the side of the vehicle body.

Hereinafter, the rear end portion 12d of the side sill 12 will be described as a bag-shaped portion 12d.
That is, the side sill 12 includes a side sill body 12f excluding the bag-like portion 12d and a bag-like portion 12d.
Further, a connecting portion between the inner lower flange 48 and the outer lower flange 55 will be described as a sill lower flange 57 of the side sill 12.

As shown in FIGS. 4 and 5, a floor panel 21 is provided between the left and right side sills 12 (the right side sills are not shown). Since the floor panel 21 is a substantially symmetrical member, the left side will be described in detail, and the description of the right side will be omitted.
The floor panel 21 is a steel plate having a lower strength than the inner panel 41 and the outer panel 42, and is formed of a thin plate having a small plate thickness dimension.

  Furthermore, the floor panel 21 has a floor bottom 61 disposed between the left and right side sills 12 and an upper wall (outer portion) 64 that is bent upward from the left side 61 a of the floor bottom 61.

  The floor bottom portion 61 includes a flat portion 62 that is substantially horizontal and flat, and an inclined portion 63 that is inclined upward from the left side 62a of the flat portion 62 to the lower side of the upper wall 64.

  By providing the inclined portion 63 on the floor bottom 61, the rigidity of the floor panel 21 can be improved. Further, by forming the drainage hole 68 in the flat part 62, the water can be well discharged from the drainage hole 68 of the flat part 62 to the outside 36 by guiding the water to the flat part 62 by the inclined part 63. .

  As shown in FIG. 6, the floor bottom 61 has a jig-removal recess 66 formed between a portion 62c near the front 62b and a substantially center 62d in the vehicle longitudinal direction. The jig removing recess 66 is formed in order to prevent the mounting jig from interfering with the floor panel 21 when the pulling hook is mounted using the mounting jig.

Therefore, as shown in FIGS. 4 and 6, the floor bottom 61 is inclined so that the outer end portion (inclined portion 63) of the floor bottom 61 is inclined at the inclination angle θ <b> 1 with respect to the flat portion 62 at the front portion 62 b. It is formed in a shape.
A bulging portion 72 (described later) is connected to the inclined portion 63 from below.

As shown in FIGS. 6 and 7, the floor bottom 61 is substantially horizontal with the outer end (that is, the recess 66) of the floor bottom 61 being recessed upward with respect to the flat portion 62 at the center 62 d. Is formed.
An overhang portion 72 is connected to the recess 66 from below.

Further, as shown in FIGS. 6 and 8, the floor bottom 61 is inclined so that the outer end portion (inclined portion 63) of the floor bottom 61 is inclined at an inclination angle θ1 with respect to the flat portion 62 at the rear portion 62e. Is formed.
An overhang portion 72 is connected to the inclined portion 63 from below.
Thus, since the overhanging portion 72 is connected over the entire length L3 of the floor bottom portion 61 (that is, the floor panel 21), it corresponds to the outer end portion (inclined portion 63, flat portion 62) of the floor bottom portion 61. Thus, an overhang portion 72 is formed.

Returning to FIG. 7, the upper wall 64 is bent upward along the inner side wall 44 of the inner panel 41 and connected to the inner side wall 44.
A cross member 22 extends in the vehicle width direction along the floor panel 21 between the left side sill 12 and the right side sill 12 (not shown).
Since the cross member 22 is a substantially bilaterally symmetric member, the left side will be described in detail, and the description of the right side will be omitted.

The cross member 22 is formed in an inverted hat shape in cross section, and a lower portion 22 a is connected along the floor panel 21. Further, the cross member 22 has a left end portion (end portion) 22 b connected to the inner side wall 44 and connected to the upper wall 64.
Therefore, it is possible to suppress the side sill 12 from being deformed into the vehicle compartment 37 by an impact load input from the side of the vehicle body.

As shown in FIGS. 4 and 6, the floor panel 21 is connected to the side sill 12 by a strip-shaped plate material 24.
The strip-shaped plate member 24 is formed of a material such as steel or aluminum, extends in the longitudinal direction of the vehicle body, and is formed in a strip shape so as to have a constant width dimension W1 in the vehicle width direction.
The belt-like plate member 24 includes a belt-like portion 71 formed between the inner connection point (inner connection portion) 75 and the outer connection point (outer connection portion) 77 in a substantially straight section in the vehicle width direction. It has an inner overhanging portion 72 that protrudes inward in the vehicle width direction from the side, and an outer overhanging portion 73 that is bent downward from the outer side of the belt-like portion 71.

The inner side connection part 75 is a connection part to which the strip-shaped board | plate material 24 (inner extension part 72) and the floor panel 21 (inclination part 63) were connected. The outer side connection part 77 is a connection part to which the strip-shaped plate material 24 (outside extension part 73) and the side sill 12 (sill lower flange 57) are connected.
The belt-like portion 71 also serves as a fitting member that hides the seam 78 where the floor panel 21 (upper wall 64) and the side sill 12 are in contact with each other and the concave portion 79 below the vehicle body so that it cannot be seen from the outside 36 side. Yes.
The concave portion 79 is formed by the inclined portion 63 of the floor bottom portion 61 and the inner bottom portion 47 of the inner panel 41.

The overhanging portion 72 is connected to the floor bottom portion 61 (the inclined portion 63, the jig-excluding recess 66) over the entire length L3 of the floor panel 21. Further, the overhang portion 73 is connected to the sill lower flange 57 over the substantially entire length L4 of the side sill.
That is, the sill lower flange 57 is the bottom of the side sill 12 to which the outer projecting portion 73 of the belt-like plate material 24 can be connected.

As described above, the bulging portion 72 is connected to the floor bottom portion 61, and the outer bulging portion 73 is connected to the sill lower flange 57, so that the sill lower flange 57 and the floor bottom portion 61 are belt-like plate members in the longitudinal direction of the vehicle body. 24.
In this state, the belt-like portion 71 is disposed substantially horizontally facing the vehicle width direction (see FIG. 4).

Here, the outer lower flange 55 and the inner lower flange 48 (that is, the sill lower flange 57) protrude downward. Therefore, it is possible to easily connect (weld) the outer projecting portion 73 of the belt-like plate member 24 to the sill lower flange 57.
Moreover, the outer lower flange 55, the inner lower flange 48, and the outer overhanging portion 73 can be simultaneously connected by overlapping the outer overhanging portion 73 of the strip-shaped plate member 24 on the outer lower flange 55 and the inner lower flange 48. Thereby, the operation | work which connects (welds) the overhang | projection part 73 can be made still easier.

  Furthermore, by overlapping the outer overhanging portion 73 on the outer lower flange 55 and the inner lower flange 48, a large thickness dimension T1 of the overlapped portion can be secured. Thereby, the intensity | strength of the junction part which joined the sill lower flange 57 and the overhang | projection part 73 is securable favorable.

In addition, the belt-like portion 71 of the belt-like plate member 24 is formed in a substantially straight section so that it is substantially horizontal. Therefore, as shown in FIGS. 4, 7, and 8, even if the shapes of the front portion 62 b, the center portion 62 d, and the rear portion 62 e of the floor bottom 61 (outer end portion) are changed to an inclined shape or a flat shape, The strip-shaped plate member 24 can be easily deformed along the shape of the floor bottom 61.
Thereby, the strip | belt-shaped board | plate material 24 can be manufactured easily and the cost of the strip | belt-shaped board | plate material 24 can be held down.

Further, by forming the belt-like portion 71 of the belt-like plate member 24 in a substantially straight section so as to be substantially horizontal, it is possible to suitably support an impact load input from the side of the vehicle body.
That is, when an impact load is input to the center pillar 13 (see FIG. 2) from the side of the vehicle body, the center pillar 13 tries to rotate toward the passenger compartment side with the side sill 12 as an axis. Therefore, a bending moment M1 directed toward the vehicle interior direction (vehicle width direction inner side) acts on the side sill 12. When the bending moment M <b> 1 acts on the side sill 12, a compressive force F <b> 1 acts on the cross member 22, and a tensile force F <b> 2 acts on the strip-shaped plate member 24.
Therefore, the compressive force F1 acting on the cross member 22 can be kept small by supporting the tensile force F2 acting on the belt-like plate material 24 with the belt-like plate material 24.

Here, since the left end 22b of the cross member 22 is connected to the inner side wall 44 and to the upper wall 64, the deformation of the side sill 12 can be suppressed by the cross member 22. By suppressing the deformation of the side sill 12, the tensile force F <b> 2 acting on the strip-shaped plate material 24 can be favorably supported by the strip-shaped plate material 24.
Thereby, it is possible to suppress the side sill 12 (upper portion 12e) from being deformed toward the vehicle compartment 37 in a state where the thickness of the cross member 22 is kept small, and to reduce the weight of the cross member 22. it can.

By the way, when supporting the load F2 in the tensile direction, the strength can be suppressed to be smaller than when supporting the load F1 in the compression direction. Furthermore, the strip-shaped plate member 24 (the strip-shaped portion 71) is formed in a substantially straight section. Therefore, the plate | board thickness dimension of the strip | belt-shaped board | plate material 24 can be restrained small, and the load F2 of a tension | pulling direction can be supported by the lightweight strip | belt-shaped board | plate material 24. FIG.
As a result, even if the vehicle body side structure 10 is newly provided with a light belt-like plate member 24, the vehicle body side structure 10 can be reduced in weight by reducing the weight of the cross member 22.
In this way, by connecting the inner panel 41 and the floor panel 21 with the strip-shaped plate material 24, the side sill 12 is prevented from being deformed to the vehicle compartment 37 side by the impact load input from the side of the vehicle body, and the weight is reduced. Can be achieved.

Further, the upper wall 64 of the floor panel 21 was connected to the inner side wall 44 of the inner panel 41. Therefore, when the floor panel 21 vibrates in the vertical direction (arrow A direction), the vibration in the vehicle width direction is transmitted to the inner side wall 44 via the upper wall 64.
The vibration generated in the inner side wall 44 acts as a tensile force on the strip-shaped plate member 24 having a substantially straight section. Thereby, the vibration of the up-down direction which acts on the floor panel 21 can be suppressed with the strip | belt-shaped board | plate material 24 with a small board | plate thickness dimension.

Here, the inner distance between the inner connecting portion 75 in which the overhang portion 72 is connected to the floor bottom portion 61 and the central connecting portion 76 in which the upper wall 64 is connected to the inner side wall 44 is set to L1.
Further, the outer distance between the outer connecting portion 77 and the central connecting portion 76 in which the outer projecting portion 73 is connected to the sill lower flange 57 is set to L2.
By the way, by reducing the inner distance L1, the inner connection portion 75 for connecting the belt-like plate material to the floor panel can be brought closer to the inner side wall 44 side. Thereby, since the rigidity of the floor panel 21 can be enhanced by the inner side wall 44, it is difficult for the floor panel 21 to generate vertical vibration.

On the other hand, by reducing the outer distance L2, the outer connecting portion 77 for connecting the strip-shaped plate material 24 to the side sill 12 can be brought closer to the inner side wall 44 side. Since the rigidity of the side sill 12 can be increased, the cross-section of the side sill 12 can be hardly crushed (not easily deformed) by an impact load.
When an impact load is input from the side of the vehicle body, a tensile force can be suitably applied to the strip-shaped plate member 24, and the applied tensile force can be supported by the strip-shaped plate member 24.
Thereby, it can suppress that the side sill 12 deform | transforms into the compartment 37. FIG.

However, when the inner distance L1 is decreased, the outer distance L2 is increased, and when the outer distance L2 is decreased, the inner distance L1 is increased.
Therefore, the inner distance L1 and the outer distance L2 are set to be equal.
As a result, it is difficult for the floor panel 21 to generate vertical vibrations, and the side sill 12 is less likely to be deformed toward the vehicle compartment 37 side.

As shown in FIGS. 3 and 7, the beam vertical branch 34 is disposed such that the lower end portion 34 a is disposed above the strip-shaped plate member 24 and is opposed to the strip-shaped plate member 24 in the longitudinal direction of the vehicle body.
Therefore, when the impact load F3 is input to the door beam 33 from the side of the vehicle body, the input impact load F3 passes through the lower end portion 34a of the beam vertical branch 34 and the upper portion 12e of the side sill 12 (specifically, the belt-shaped plate material 24). To the corresponding part).
As a result, the tensile force F <b> 2 is applied to the belt-shaped plate member 24, and the applied tensile force F <b> 2 is supported by the belt-shaped plate member 24, whereby the side sill 12 can be prevented from being deformed into the vehicle compartment 37.

Here, the rigidity of the side sill 12 can be improved by forming the side sill 12 with a high-strength steel plate. By increasing the rigidity of the side sill 12, the cross section of the side sill 12 can be hardly crushed (not easily deformed) by the impact load F3.
Therefore, when the impact load F <b> 3 is input to the door beam 33 from the side of the vehicle body, the tensile force F <b> 2 can be suitably applied to the strip-shaped plate member 24, and the applied tensile force F <b> 2 can be supported by the strip-shaped plate member 24.
Thereby, it can suppress more favorably by the strip | belt-shaped board | plate material 24 that the side sill 12 deform | transforms into the compartment 37. FIG.

In addition, as shown in FIG. 2, the front pillar 14 is provided at the front end portion 12 a of the side sill 12, so that the front end portion 12 a is closed by the front pillar 14.
Furthermore, by making the rear end portion of the side sill 12 a bag-like portion 12d, the cross section of the rear end portion 12d is closed by the bag-like portion 12d.
By closing the front end portion 12a and the rear end portion 12d of the side sill 12, the rigidity of the side sill 12 is increased, and the cross section of the side sill 12 is hardly crushed (not easily deformed) by a load from the side of the vehicle body.

As shown in FIG. 7, by suppressing the deformation of the side sill 12, when a load F3 is input to the door beam 33 from the side of the vehicle body, the tensile force F2 is suitably applied to the belt-shaped plate member 24, and the applied tensile force F2 Can be supported by a strip-shaped plate member 24.
Thereby, it can suppress more favorably by the strip | belt-shaped board | plate material 24 that the side sill 12 deform | transforms into the compartment 37. FIG.

Further, as shown in FIGS. 3 and 7, the beam longitudinal branch 34 is disposed at a position where the lower end portion 34 a faces the cross member 22.
Thereby, when the impact load F3 is input to the door beam 33 from the side of the vehicle body, the input impact load F3 can be supported by the cross member 22.

In addition, as shown in FIG. 6, an overhang portion 72 is connected to the floor bottom portion 61 in the entire length L <b> 3 of the floor panel 21.
Thereby, in the full length L3 (namely, substantially full length L4 of the side sill 12) of the floor panel 21, the deformation | transformation to the compartment 37 of the side sill 12 by the impact load input from the vehicle body side can be suppressed.

  Here, returning to FIG. 2, the side sill 12 is covered with a decorative side sill garnish 26 from the outside 36 side. The side sill garnish 26 is formed of a resin material and fastened to the side sill 12 with a fastening member such as a clip.

By covering the side sill 12 with the side sill garnish 26, the connecting portion 81 is covered with the side sill garnish 26.
The connecting portion 81 is a portion that connects the bag-like portion 12d to the rear end portion of the side sill body 12f.
By covering the connection part 81 with the side sill garnish 26, the connection part 81 of the bag-like part 12d can be concealed so that it cannot be seen from the outside 36 side, and the appearance of the vehicle can be improved.

Next, an example in which the impact load F4 is input to the center pillar 13 of the vehicle body side structure 10 from the vehicle body side will be described with reference to FIG.
As shown in FIG. 9A, an impact load F4 is input to the center pillar 13 from the side of the vehicle body.
As shown in FIG. 9B, when the impact load F <b> 4 is input to the center pillar 13, the center pillar 13 tries to rotate toward the passenger compartment side with the side sill 12 as an axis. Therefore, a bending moment M2 directed toward the vehicle interior direction (inner side in the vehicle width direction) acts on the side sill 12. When the bending moment M <b> 2 acts on the side sill 12, a tensile force F <b> 5 acts on the strip-shaped plate material 24.

Here, when the load in the tensile direction is supported, the strength can be reduced compared to the case where the load in the compression direction is supported.
In this way, by connecting the inner panel 41 and the floor panel 21 with the strip-shaped plate material 24, the side sill 12 is prevented from being deformed to the vehicle compartment 37 side by the impact load F4 input to the center pillar 13 from the side of the vehicle body. And weight reduction can be achieved.

Next, an example in which the impact load F6 is input to the front side door 17 of the vehicle body side structure 10 from the vehicle body side will be described with reference to FIG.
As shown in FIG. 10A, the lower end 34 a of the beam vertical branch 34 is disposed at a position facing the cross member 22.
In this state, when the impact load F6 is input to the front side door 17 from the side of the vehicle body, the input impact load F6 passes through the door beam 33 and is applied to the beam vertical branch 34 (lower end 34a) as a load F7 (FIG. 10B). Reference).

As shown in FIG. 10B, the load F <b> 7 transmitted to the beam vertical branch 34 (lower end portion 34 a) is transmitted to the side sill 12. The load F7 transmitted to the side sill 12 is transmitted as the load F8 to the cross member 22 through the side sill 12, and the transmitted load F8 can be supported by the cross member 22.
Thereby, it can suppress that the side sill 12 deform | transforms into the compartment 37 side.

Next, an example of suppressing vibration in the vertical direction of the floor panel 21 will be described with reference to FIG.
As shown in FIG. 11, the upper wall 64 of the floor panel 21 is connected to the inner side wall 44 of the inner panel 41. Therefore, when the floor panel 21 vibrates in the vertical direction (arrow B direction), vibration in the vehicle width direction (arrow C direction) is transmitted to the inner side wall 44 via the upper wall 64.

A tensile force acts on the strip-shaped plate member 24 having a substantially linear cross section by the vibration generated in the inner side wall 44.
Thereby, the vibration of the inner side wall 44 (that is, the vibration of the floor panel 21) can be suppressed by the strip-shaped plate member 24, so that the rigidity of the floor panel 21 can be improved and the noise of the vehicle compartment 37 can be reduced. it can.

  Next, the vehicle body side part structures of the second and third embodiments will be described with reference to FIGS. In addition, in the vehicle body side part structure of Example 2 and Example 3, the same code | symbol is attached | subjected about the same similar member as the vehicle body side part structure 10 of Example 1, and description is abbreviate | omitted.

A vehicle body side structure 90 according to the second embodiment will be described.
As shown in FIG. 12, the vehicle body side structure 90 is configured such that the inner bottom portion 93 of the inner panel 91 is formed flat, and a belt-like plate material 95 is connected to the inner bottom portion 93. Other configurations are the vehicle body of the first embodiment. Similar to the side structure 10.

The inner panel 91 is formed by forming the inner bottom portion 93 flat so that the outer projecting portion 96 of the strip-shaped plate material 95 can be connected. Other shapes are the same as those of the inner panel 41 of the first embodiment. .
The inner bottom portion 93 is the bottom portion of the side sill 12 to which the outer projecting portion 96 of the strip-shaped plate material 95 can be connected.

In the floor panel 101, the flat portion 103 of the floor bottom portion 102 is disposed substantially horizontally with respect to the inner bottom portion 93, and the inclined portion 104 is inclined upwardly from the flat portion 103 toward the upper wall 64. The shape is the same as that of the inner panel 41 of the first embodiment.
The flat portion 103 and the inner bottom portion 93 are connected by a strip-shaped plate material 95.

According to the vehicle body side structure 90, the floor bottom 102 is provided with the inclined portion 104, and the inclined portion 104 is inclined upwardly from the flat portion 103 toward the upper wall 64.
By providing the inclined portion 104 on the floor bottom portion 102, the rigidity of the floor panel 101 can be improved. Further, since the water can be guided to the flat portion 103 by the inclined portion 104, the water can be favorably discharged from the drain hole 106 to the outside 36 by forming the drain hole 106 in the flat portion 103.

By providing the inclined portion 104 on the floor bottom 102, when the floor panel 101 vibrates in the vertical direction (arrow C), vibration in the vehicle width direction (arrow D direction) transmitted to the inner side wall 92 increases. Can be considered.
Here, the inner projecting portion 97 of the strip-shaped plate material 95 is connected to the flat portion 103, whereby the inner bottom portion 93 and the flat portion 103 are connected by the strip-shaped plate material 95.

  Therefore, the tensile force F <b> 9 acts on the strip-shaped plate member 95 by generating vibration in the vehicle width direction (arrow D direction) on the inner side wall 92. By supporting the tensile force F <b> 9 with the strip-shaped plate material 95, vibration in the vehicle width direction (arrow D direction) transmitted to the inner side wall 92 can be suppressed with the strip-shaped plate material 95. Thereby, the vibration of the floor panel 101 and the noise in the compartment 37 can be reduced.

A vehicle body side structure 110 according to the third embodiment will be described.
As shown in FIG. 13, the vehicle body side structure 110 is obtained by replacing the belt-like plate material 24 of the first embodiment with a belt-like plate material 112, and other configurations are the same as those of the vehicle body side portion structure 10 of the first embodiment. .

  The strip-shaped plate material 112 is, for example, extruded from an aluminum material, and is formed in a substantially linear section in the vehicle width direction between the inner connection point (inner connection portion) 116 and the outer connection point (outer connection portion) 117. 113 and inner and outer projecting portions 114 and 115 disposed along a recess 79 below the vehicle body.

The inner connection portion 116 is a connecting portion in which the bulge portion 114 and the floor panel 21 (inclined portion 63) are fastened with bolts 121 and nuts 122. The outer connection portion 117 is a connecting portion in which the outer overhang portion 115 and the side sill 12 (inner bottom portion 47) are fastened with bolts 123 and nuts 124.
That is, the strip-shaped plate material 112 is connected along the recess 79. The belt-like plate material 112 can be detachably attached to the recess 79 by mechanically fastening the belt-like plate material 112 using bolts and nuts.

According to the vehicle body side structure 110 according to the third embodiment, the same effects as those of the vehicle body side structure 10 according to the first embodiment can be obtained.
Further, the belt-like portion 113 also serves as a fitting member that hides the seam 78 where the floor panel 21 (upper wall 64) and the side sill 12 are in contact with each other and the concave portion 79 below the vehicle body so that it cannot be seen from the outside 36 side. Also serves as.

It should be noted that the vehicle body side structure according to the present invention is not limited to the above-described embodiments, and can be changed or improved as appropriate.
For example, in the first to third embodiments, an example in which the belt-like plate members 24 and 95 are formed in a flat plate shape has been described. It is also possible to use a plate material having a convex portion. By providing the belt-shaped plate material with the beads extending in the vehicle width direction, the tensile force acting on the belt-shaped plate material can be more suitably supported.

Moreover, in the said Example 1 and Example 2, although the example which formed the inner panel 41 and the outer panel 42 with the high strength steel plate was demonstrated, it is not restricted to this, The inner panel 41 and the outer panel 42 are plate | board thickness from the floor panel 21. It is also possible to form a thick plate having a large size.
By forming the inner panel 41 and the outer panel 42 with thick plates, the same effects as in the first and second embodiments can be obtained.

  Further, in the third embodiment, the bolts and nuts are exemplified as the fastening members for fastening the belt-like plate material 112 to the recess 79. However, the present invention is not limited to this, and other fastening members such as rivets may be used.

  Also, the vehicle body side structure, side sill, bag-like part, center pillar, front side door, rear side door, floor panel, cross member, belt-like plate material, side sill garnish, door beam, beam shown in the first to third embodiments. The shapes and configurations of the vertical branches, the inner panel, the outer panel, the sill lower flange, the floor bottom, the flat portion, the inclined portion, the upper wall, and the like are not limited to those illustrated, and can be appropriately changed.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to an automobile having a vehicle body side structure in which an outer side portion of a floor panel is connected to a side sill and an end portion of a cross member is connected to the side sill.

  DESCRIPTION OF SYMBOLS 10,90 ... Car body side part structure, 12 ... Side sill, 12a ... Front end part of side sill, 12d ... Bag-like part (rear end part of side sill), 13 ... Center pillar, 17 ... Front side door (side door), 18 ... Rear side door (side door) 21, 101 ... floor panel, 22 ... cross member, 22b ... left end of the cross member (end), 24, 95 ... strip-shaped plate material, 26 ... side sill garnish, 31 ... front side door Inside, 33 ... Door beam, 34 ... Beam longitudinal branch, 34a ... Lower end of beam longitudinal branch, 41, 91 ... Inner panel, 42 ... Outer panel, 44, 92 ... Inner side wall, 46 ... Inner upper flange (upper flange), 47 ... Inner bottom, 48 ... Inner lower flange (lower flange), 53 ... Outer upper flange (upper flange), 55 ... Outer lower flange Lower flange), 57 ... Sill lower flange (bottom of side sill), 61,102 ... Floor bottom, 62,103 ... Flat part, 63,104 ... Inclined part, 64 ... Upper wall (outer part), 75,97 ... Inner Connection part, 77, 96 ... outer connection part, 76 ... center connection part, 81 ... connection part, 93 ... inner bottom part (bottom part of side sill), L1 ... inner distance, L2 ... outer distance, L3 ... full length of floor panel.

Claims (10)

The outer panel and the inner panel forming the side sill are each formed in a substantially hat-shaped cross section, and the side sill is formed in a closed cross section by connecting the upper and lower flanges of the outer panel and the upper and lower flanges of the inner panel,
The inner wall of the inner panel is connected to an upper wall obtained by bending the outer side of the floor panel upward,
An end portion of a cross member is connected to the inner side wall, and the cross member has a vehicle body side structure that extends in a vehicle width direction,
Connecting the bottom of the side sill and the floor bottom of the floor panel, comprising a strip-shaped plate material formed in a substantially straight section in the vehicle width direction and extending in the longitudinal direction of the vehicle body,
A vehicle body side structure, wherein the cross member is connected to an upper wall of the floor panel. The bottom of the side sill is the inner bottom of the inner panel,
The inner bottom is formed flat,
The floor bottom is
A flat portion arranged substantially horizontally with respect to the inner bottom portion;
An inclined part that inclines upwardly from the flat part toward the upper wall,
2. The vehicle body side part structure according to claim 1, wherein the inner bottom part and the flat part are connected by the belt-shaped plate material. A sill lower flange is formed on the side sill by joining the lower flange of the outer panel and the lower flange of the inner panel,
3. The vehicle body side structure according to claim 2, wherein the sill lower flange is the bottom of the side sill. The inner distance between the inner connecting portion where the belt-like plate material is connected to the floor panel and the central connecting portion where the upper wall is connected to the inner side wall is set to L1,
The outer distance between the outer connecting portion in which the strip-shaped plate material is connected to the bottom of the side sill and the central connecting portion is set to L2,
The vehicle body side part structure according to any one of claims 1 to 3, wherein the inner distance L1 and the outer distance L2 are equal. The strip-shaped plate material is
Connected to the bottom of the floor over the entire length of the floor panel in the longitudinal direction of the vehicle body,
The vehicle body side part structure according to any one of claims 1 to 4, wherein the vehicle body side part structure is formed in a substantially straight section in the vehicle width direction. A side door provided on the outside in the vehicle width direction of the side sill and above,
The side door
A reinforcing door beam provided inside and extending in the longitudinal direction of the vehicle body;
A beam branch extending from the door beam toward the side sill,
The beam longitudinal branch is
The vehicle body side according to any one of claims 1 to 5, wherein a lower end portion is disposed above the belt-shaped plate material and is disposed at a position facing the belt-shaped plate material in a longitudinal direction of the vehicle body. Part structure. The door beam longitudinal branch is
The vehicle body side part structure according to claim 6, wherein the lower end portion is disposed at a position facing the cross member. The outer panel and the inner panel of the side sill are:
It is formed from a thick plate having a larger plate thickness than the floor panel, or a high-strength steel plate,
The floor panel is
The vehicle body side part structure according to any one of claims 1 to 7, wherein the vehicle body side part structure is formed of a thin plate having a thickness smaller than that of the outer panel and the inner panel.   The vehicle body side part structure according to any one of claims 1 to 8, wherein each of the side sills has its front end portion and rear end portion closed. Including a decorative side sill garnish covering the side sill from the outside of the vehicle;
The side sill is
Forming a rear end portion, and having a bag-like portion closing the cross section of the rear end portion;
The vehicle body side part structure according to any one of claims 1 to 9, wherein a connecting portion for connecting the bag-like portion is covered with the side sill garnish.

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