JP2010188802A - Side vehicle-body structure of automotive vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side vehicle-body structure of an automotive vehicle, capable of improving the rigidity of a vehicle body while preventing a vehicle-body side from being chipped without using other members such as a side sill molding. <P>SOLUTION: A cross section of a side sill reinforcement 18 includes: an upper wall 18c; a substantial planar joining part 18d extending downward in a vertical direction of the vehicle body; a second upper wall 18e extending in a substantially horizontal direction; a flat plane part 18f; and a stepped part 18g protruding in the vertical direction of the vehicle body downward of the lower end of a second lower flange 18b. Thus, a second closed cross section 20 as swelling portion projecting outside of an outside boundary A in the vehicle width direction is formed. Therefore, a closed cross section area of the side sill 7 is increased and is prevented from being chipped. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a side body structure having a side sill connected to a side body outer panel that forms a surface of a vehicle body side portion, and more particularly to a side body structure of an automobile capable of suppressing chipping to the body side. .

2. Description of the Related Art Conventionally, in an automobile, a side sill extending in the longitudinal direction of the vehicle body is disposed below the left and right side surfaces of the vehicle body. The side sill is formed in a closed cross-sectional structure by a side sill inner on the vehicle width direction inner side and a side sill outer on the vehicle width direction outer side for the purpose of reducing the weight of the vehicle body while maintaining the rigidity of the lower part of the vehicle body.

On the other hand, in recent years, as one of the methods to improve the appearance of the side of the vehicle body, such as a sense of stability by visual recognition, and to expand the degree of freedom of design, a side sill molding that covers the outside of the side sill in the vehicle width direction is attached to increase the volume on the exterior of the vehicle body lower The structure to be known is known. (Patent Document 1)

As shown in FIG. 12, Patent Document 1 includes a side sill inner 101 and a side sill outer 102, and the side sill 100 is reinforced between the side sill inner 101 and the side sill outer 102 and cooperates with the side sill inner 101. A structure having a side sill reinforcement 103 forming a closed section is disclosed. Further, in Patent Document 1, the side sill 100 is extended in the vehicle front-rear direction so as to cover the vehicle width direction outer side and the lower surface side of the side sill 100, and the side portion 105 covering the side surface of the side sill 100 and the lower surface of the side sill 100 are covered. A side sill molding (garnish) 104 including a lower surface portion 106 and a jack recess 107 has been proposed.

JP 2007-261480 A

  In Patent Document 1, it is possible to prevent foreign substances such as sand from entering and accumulating between the side sill and the side sill molding while improving the appearance and avoiding the interference between the jack and the side sill molding. In addition, by projecting the lower part of the vehicle body to the outside in the vehicle width direction, it is expected that the aerodynamic characteristics are improved by suppressing chipping of sand, stones and the like due to traveling of the vehicle and reducing the traveling wind flowing into the wheel house.

  On the other hand, when a side sill molding is installed as in the prior art, a new design of the side sill molding and an additional assembly process are required, and there are problems in terms of cost. In addition, from the viewpoint of safety, although further improvement in vehicle body rigidity is required, the proposed technique cannot improve the vehicle body rigidity, although it can improve the appearance.

  In a general monocoque body, a side body outer panel forming a surface around the side door opening is configured to extend downward in the vertical direction of the vehicle body to integrally form a side sill outer. With this configuration, the side body outer panel and the side sill outer can be formed at the same time during molding by pressing.

  Therefore, at the time of molding the side body outer panel, the closed section formed by the side sill is increased by integrally forming a bulging portion that protrudes outward in the vehicle width direction outside of the side sill outer, and without using the side sill molding, It is conceivable to improve both the appearance of the vehicle and the rigidity of the vehicle body.

  However, since the side body outer panel is not only long in the longitudinal direction of the vehicle body but also long in the vertical direction of the vehicle body and is a member that forms the design surface of the vehicle, there is a problem in terms of formability. In other words, when the bulging part is formed on the outer side in the vehicle width direction of the side sill, deep drawing by pressing is required in the end region of the side body outer panel, and the drawing ratio needs to be increased as the bulging part is increased. There is.

On the other hand, when performing press working, from the viewpoint of fluidity of the material, the end region of the member is inferior in plastic workability compared to the central region of the member. Thus, the larger the processing amount, the more prominent. Therefore, if the amount of processing is large and an bulging portion is to be formed in the end region of a large member such as a side body outer panel, it is necessary to eliminate processing problems such as cracking. Even in the case where the side body outer panel and the side sill outer are separately formed, the above-mentioned problem in the processing similarly exists in the side sill outer that forms the vehicle body surface that requires various processing.

  An object of the present invention is to provide a side body structure of an automobile capable of improving the rigidity of the vehicle body while suppressing chipping to the side part of the vehicle body without using a separate member such as a side sill molding.

The side body structure of an automobile according to the present invention includes a side body outer panel that forms a surface of the body side part, and a side sill that extends in the longitudinal direction of the vehicle body and is connected to the side body outer panel.

According to a first aspect of the present invention, the side sill is interposed between a side sill outer provided at a lower portion of the side body outer panel, a side sill inner of the side sill outer in a vehicle width direction, and the side sill inner and the side sill outer. And a plate-like reinforcing member that forms a closed cross-section in cooperation with the side sill inner, and the plate-like reinforcing member includes a substantially planar joining portion joined to a lower end portion of the side sill outer, and this joining. And a bulging portion that bulges outward in the vehicle width direction.

In the first aspect of the present invention, the plate-shaped reinforcing member interposed between the side sill inner and the side sill outer is joined to the substantially flat joint joined to the lower end of the side sill outer, and the vehicle width direction outside from the joint. Since the bulging portion that bulges is formed, a bulging portion that forms a closed cross-section with a large cross-sectional area can be obtained without causing problems in processing such as cracking.

According to a second aspect of the present invention, in the first aspect of the invention, the side body outer panel has an opening to which an openable / closable side door is mounted, and the bulging portion is a lower end of the side door that is closed. It bulges outward in the vehicle width direction from the portion.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the side sill outer is integrally formed with the side body outer panel.

According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the bulging portion has a flat plate portion extending in the vehicle body vertical direction on the outer side in the vehicle width direction.

The invention according to claim 5 is the invention according to claim 4, wherein the side body outer panel includes a wheel house portion that accommodates a rear wheel in the rearward direction of the vehicle body, and the wheel house portion when the side door is in a closed state. A wheel house arch portion forming a surface substantially continuous with the side door between the side door and the wheel house arch portion covering a lower end portion of the wheel house arch portion and substantially the same as the flat plate portion. A garnish that forms a continuous surface is provided.

According to a sixth aspect of the present invention, in the invention according to any one of the second to fifth aspects, the lower end portion of the joint portion is formed at substantially the same height as the lower end portion of the side door in the closed state in the vehicle body vertical direction. It is characterized by that.

A seventh aspect of the present invention is the flange according to any one of the first to fifth aspects, wherein the side sill includes a lower end portion of the side sill inner and a lower end portion of the plate-like reinforcing member in a lower region of the closed cross section. The bulging portion has a stepped portion projecting downward from the lower end portion of the flange portion on the vehicle body vertical direction lower side.

According to the first aspect of the present invention, the rigidity of the vehicle body can be improved while suppressing chipping to the side of the vehicle body without using a separate member such as a side sill molding. In other words, the plate-shaped reinforcing member that is a vehicle body component member forms a bulging portion having a large closed cross section on the outer side in the vehicle width direction, so that the cross sectional area of the closed cross section of the side sill is increased without causing any processing problems. Can do. Further, the chipping of sand, stones, etc. caused by the running of the vehicle can be blocked by the bulging portion on the outer side in the vehicle width direction, and the scattering of sand, stones, etc. to the vehicle body side portion can be prevented. In addition, as in the case of using a separate member such as a side sill molding, it is possible to improve the appearance of the vehicle and improve the aerodynamic characteristics.

According to the invention of claim 2, since the bulging portion bulges outward in the vehicle width direction from the lower end portion of the side door in the closed state, sand, stones, etc. are scattered at the lower end portion of the side door. Can be surely prevented.

According to the invention of claim 3, since the side sill outer is integrally formed with the side body outer panel, the side sill outer side in the vehicle width direction of the side sill is processed without processing the side body outer panel having a large processing area and processing amount. A bulging portion having a large closed cross section can be formed. Further, the present invention can be applied to any type of vehicle regardless of the shape and processing conditions of the side body outer panel.

According to the invention of claim 4, since the bulging portion has a flat plate portion extending in the vehicle body vertical direction on the outer side in the vehicle width direction, the shape of the side sill can be set regardless of the shape and processing conditions of the side body outer panel, The degree of freedom in design can be improved.

According to the invention of claim 5, the wheel house arch portion covers the lower end portion of the wheel house arch portion, and is provided with a garnish that forms a surface substantially continuous with the flat plate portion. Can be improved.

According to invention of Claim 6, since the lower end part of the said junction part is formed in substantially the same height in the vehicle body up-down direction with the lower end part of the said side door by which the side door was made into the closed state, it impairs an external appearance. The bulging portion can be formed with a plate-like reinforcing member. That is, when the side door is in the closed state, the joint portion between the side sill outer and the plate-like reinforcing member can be hidden by the side door, and the bulging portion can be removed from the joint portion even when the side door is in the open state. Since it swells, the boundary between the side sill outer and the plate-like reinforcing member can be made inconspicuous.

According to the invention of claim 7, the bulging portion is provided on a lower side of the vehicle body in the vertical direction so as to protrude below the lower end portion of the flange portion formed by the lower end portion of the side sill inner and the lower end portion of the plate-like reinforcing member. Therefore, the flange portion can be hidden from the outside of the vehicle without providing a separate member and without changing the shape of the side sill inner.

It is a side view which shows the side part vehicle body structure of the motor vehicle based on Example 1 of this invention. It is a side view which shows the side part vehicle body structure of the state which removed the side door which concerns on Example 1. FIG. It is an exploded view of the side part vehicle body structure shown in FIG. It is a principal part perspective view of a side part vehicle body structure. It is a principal part perspective view of the side part vehicle body structure which concerns on Example 1. FIG. It is a figure which shows the VV sectional view in FIG. It is a figure which shows the VI-VI line cross section in FIG. It is a figure which shows the VII-VII line cross section in FIG. It is a figure which shows the VIII-VIII sectional view taken on the line in FIG. It is a principal part perspective view of the side part vehicle body structure which concerns on Example 2. FIG. FIG. 8 is a cross-sectional view corresponding to FIG. 7 in Example 2. It is explanatory drawing of a garnish attachment part. It is explanatory drawing of a prior art.

Hereinafter, the best mode for carrying out the present invention will be described.

  Hereinafter, Example 1 of the present invention will be described with reference to the drawings. 1 is a side view showing a side body structure of a vehicle according to a first embodiment, FIG. 2 is a side view showing the side body structure with a side door removed, and FIG. 3 is a side view of the side body structure shown in FIG. FIG. 4 is an exploded view, and FIG. 4 is a perspective view of a main part of the side body structure.

As shown in FIG. 1, the vehicle 1 according to the first embodiment is a four-door type passenger car. On the side of the vehicle body, a side frame outer 2 (side body outer panel), a front door 3, and a vehicle body front-rear direction rear side. The rear door 4, the front wheel 5, and the rear wheel 6 are provided. Below the front door 3 and the rear door 4, a long side sill 7 that is connected to the side frame outer 2 and extends in the vehicle longitudinal direction as a frame member of the vehicle 1 is disposed.

As shown in FIG. 2, the side frame outer 2 is formed of a wheel house arch portion 8 around the rear wheel 6 in a rear region of the side frame outer 2, a wheel house outer 14 and a wheel house inner 15 described later. And a wheel house part.

The side frame outer 2 includes a front opening 9 that is hinged so that an occupant can get on and off and the front door 3 can be opened and closed, and a rear opening 10 that is hinged so that the rear door 4 can be opened and closed like the front opening 9; A center pillar outer 11 is provided between the front opening 9 and the rear opening 10 and connects the upper end portion and the lower end portion of the side frame outer 2 in the vertical direction of the vehicle body. The side frame outer 2 is formed by press working after blanking from a steel plate having a predetermined thickness, for example, 0.7 mm.

Further, the center pillar outer 11 constitutes a center pillar 13 having a closed cross-section structure in cooperation with the center pillar inner 12 (see FIG. 5). An upper end portion of the center pillar 13 is connected to a roof side rail having a closed cross-sectional structure, and a lower end portion is connected to the side sill 7.

As shown in FIGS. 3 and 4, a wheel house outer 14 positioned on the vehicle width direction outer side and a wheel house inner 15 positioned on the vehicle width direction inner side are arranged on the inner side in the vehicle width direction of the wheel house arch portion 8. Has been. The wheel house outer 14 and the wheel house inner 15 are joined to each other at both right and left ends and an upper end portion, and an accommodation space for accommodating the rear wheel 6 is formed in the central region.

Next, based on FIGS. 5-8, the structure of the side sill 7 is demonstrated in detail. 5 is a cross-sectional view taken along line VV in FIG. 2, FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 2, FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. It is line sectional drawing.

The side sill 7 connected to the side frame outer 2 includes a side sill outer 16 formed at a lower portion of the side frame outer 2, a side sill inner 17 positioned on the inner side in the vehicle width direction of the side sill outer 16, and a side sill reinforcement 18 (plate). Shaped reinforcing member). The side sill reinforcement 18 is formed from a long steel plate having a predetermined thickness, for example, 1.4 mm, by press working. The center portion of the side frame outer 2 in the longitudinal direction of the vehicle body constitutes the center pillar outer 11, and the lower portion of the side frame outer 2 constitutes the side sill outer 16.

The substantially U-shaped side sill reinforcement 18 is disposed between the substantially hat-shaped side sill inner 17 on the inner side in the vehicle width direction and the side sill outer 16 on the outer side in the vehicle width direction, and forms a flange of the side sill inner 17. The first upper flange portion 17a and the first lower flange portion 17b and the second upper flange portion 18a and the second lower flange portion 18b forming the flange of the side sill reinforcement 18 are welded and joined. With this configuration, a flange portion 23 including a first lower flange portion 17 b of the side sill inner 17 and a second lower flange portion 18 b of the side sill reinforcement 18 is formed at the lower end portion of the side sill 7.

The cross-section of the side sill reinforcement 18 is continuous with the lower end of the second upper flange portion 18a and extends outward in the vehicle width direction with the first upper wall portion 18c and the outer end portion of the first upper wall portion 18c. A substantially planar joining portion 18d extending downward in the vertical direction, a second upper wall portion 18e bent outward from the lower end portion of the joining portion 18d in the vehicle width direction and extending in a substantially horizontal direction, and an outer end portion of the second upper wall portion 18e. And a flat plate portion 18f having a flat plate-like surface extending downward in the vertical direction of the vehicle body. The flat plate portion 18f protrudes downward from the lower end portion of the second lower flange portion 18b from the lower end portion of the flat plate portion 18f. A step portion 18g that curves upward in the direction and continues to the upper end portion of the second lower flange portion 18b on the inner side in the vehicle width direction. Further, the first upper wall portion 18c, the joint portion 18d, the second upper wall portion 18e, the flat plate portion 18f, and the step portion 18g each form a surface extending in the longitudinal direction of the vehicle body.

The side sill reinforcement 18 and the side sill inner 17 form a closed section extending in the longitudinal direction of the vehicle body. The closed cross section includes a first closed cross section 19 defined by the side sill inner 17, the first upper wall portion 18 c, the joint portion 18 d, and the second lower flange portion 18 b, and the vehicle width direction outer side of the first closed cross section 19. Is located below the second closed cross section 20 defined by the second upper wall portion 18e and the flat plate portion 18f, the first closed cross section 19 and the second closed cross section 20, and at the step portion 18g. The third closed section 21 is defined. The second closed cross-section portion 20 is configured to project further outward in the vehicle width direction than the boundary A that is the outer end surface of the rear wheel 6 in the vehicle width direction. In addition, the 2nd closed cross-section part 20 and a part of 3rd closed cross-section part 21 are equivalent to the bulging part of this invention.

Further, as shown in FIG. 5, in the region where the center pillar 13 is installed, the center pillar inner 12 extends downward in the vertical direction of the vehicle body to the weld joint portion between the first lower flange portion 17b and the second lower flange portion 18b. It is installed. That is, the side sill reinforcement 18 and the side sill inner 17 are in a state in which the center pillar inner 12 is sandwiched, and the first upper flange portion 17a, the center pillar inner 12 and the second upper flange portion 18a are triple welded, The first lower flange portion 17b, the center pillar inner 12 and the second lower flange portion 18b are triple bonded. With this configuration, in the region of the center pillar 13, the first closed cross-section portion 19 is divided into two by the center pillar inner 12 into an outer region in the vehicle width direction and an inner region in the vehicle width direction.

The lower end portion 11b of the center pillar outer 11 extends downward in the vertical direction of the vehicle body to the lower end portion of the substantially planar joining portion 18d, and the lower end portion 11b is disposed in contact with the second upper wall portion 18e. The inner side surface in the vehicle width direction of the lower end portion 11b of the center pillar outer 11 is welded and joined in a state of surface contact with the outer side surface in the vehicle width direction of the joint portion 18d. That is, the first upper wall portion 18c forms a node that divides the center pillar 13 in the vertical direction of the vehicle body.

As shown in FIG. 6, a rear opening 10 is formed on the rear side of the center pillar 13 in the longitudinal direction of the vehicle body. The first upper flange portion 17a, the second upper flange portion 18a, and the third upper flange portion 16a constituting the edge portion of the rear opening 10 above the third lower flange portion 16b of the side sill outer 16 are triple bonded. An overhanging portion 16c extending outward in the vehicle width direction continuously to the lower end portion of the third upper flange portion 16a is disposed to face the first upper wall portion 18c, and cooperates with the first upper wall portion 18c to close the fourth. A cross section 22 is formed, and the third lower flange portion 16b is configured to extend downward from the outer end portion of the overhang portion 16c in the vehicle body vertical direction.

The third lower flange portion 16b extends downward in the vehicle body vertical direction to the lower end portion of the substantially planar joint portion 18d, and is disposed in contact with the second upper wall portion 18e. The inner surface in the vehicle width direction of the third lower flange portion 16b is welded and joined in a state of surface contact with the outer surface in the vehicle width direction of the joint portion 18d.

Further, the lower end portion of the rear door 4 including the rear door outer 4a and the rear door inner 4b is located at a position facing the lower end portion of the joint portion 18d, that is, the outer end portion of the second upper wall portion 18e. The lower end portion 11b, that is, the third lower flange portion 16b of the so-called side sill outer 16, is configured to have substantially the same height when viewed from the horizontal direction. With this configuration, when the rear door 4 is closed, the lower end portion of the rear door 4 is in a state in which the second closed cross-section portion 20 of the side sill 7 is interposed between the rear door 4 and the road surface.

A weather strip 4c for preventing water and the like from entering the vehicle compartment is attached to the lower end surface of the rear door inner 4b. When the rear door 4 is closed, the rear door inner 4b contacts the outer end of the overhanging portion 16c. Sealing performance.

As shown in FIGS. 7 and 8, a side sill outer 16 and a side sill reinforcement 18 extend rearward in the vehicle longitudinal direction rearward region. The rear end region of the side sill reinforcement 18 is in contact with the wheel house arch portion 8, and the second upper flange portion 18 a and the second lower flange portion 18 b respectively contact the outer surface in the vehicle width direction of the wheel house outer 14. In contact therewith, the wheel house inner 15 is joined by triple welding.

As shown in FIG. 8, the surfaces that can be confirmed in plan view are the side sill outer 16, the seal surface, the second upper wall portion 18e, and the flat plate portion 18f. The lower end portion 8b on the front side in the vehicle longitudinal direction of the wheel house arch portion 8 is disposed in contact with the second upper wall portion 18e of the side sill reinforcement 18 in the same manner as the third lower flange portion 16b of the side sill outer 16. It weld-joins in the state which surface-contacted to the vehicle width direction outer side surface of the part 18d.

The second upper wall portion 18c has a two-stage structure of an upper wall and a lower wall below the upper wall, and is configured to increase the contact area with the wheel house arch portion 8. Further, in the vehicle front-rear direction front region of the wheel house arch portion 8, the second closed cross-section portion 20 defined by the second upper wall portion 18 e and the flat plate portion 18 f is the vehicle of the rear wheel 6 as viewed from the front of the vehicle 1. It is set as the structure which protrudes further in the vehicle width direction outer side from the boundary A used as the width direction outer side end surface.

Next, functions and effects of the main body structure according to the first embodiment will be described.
In order to form the second closed cross section 20 that is the bulging portion outside the vehicle width direction outer boundary A by the side sill reinforcement 18 that is the vehicle body constituting member, chipping such as sand and stones caused by running of the vehicle is expanded. It can be blocked by the exit and prevent sand and stones from scattering to the side of the vehicle body.

Since the bulging portion is formed without using a separate member such as a side sill molding, it is possible to prevent an increase in cost due to the newly provided separate member. In addition, since the second closed section 20 is formed by the side sill reinforcement 18, the closed section area of the side sill 7 can be increased, and the vehicle body rigidity can be improved. Furthermore, since the side sill reinforcement 18 is processed instead of the vehicle body surface member, the press workability is excellent, and the bulging portion can be easily formed.

Further, since the second closed cross section 20 by the side sill reinforcement 18 bulges outward in the vehicle width direction from the lower end portion of the side door 4 in the closed state, sand, stone, or the like is present at the lower end portion of the side door 4. It can be surely prevented from scattering. Furthermore, since the second closed section 20 bulges out from the outer boundary A in the vehicle width direction, traveling wind flowing into the wheel house can be reduced, and aerodynamic characteristics can be improved.

Since the side sill outer 16 is integrally formed with the side frame outer 2, the second closed cross section 20 can be formed while maintaining excellent molding efficiency as a whole vehicle. Regardless of processing conditions, it can be applied to any type of vehicle.

Since the second closed section 20 has a flat plate portion 18f extending in the vertical direction of the vehicle body on the outer side in the vehicle width direction, the shape of the side sill 7 can be set regardless of the shape of the side frame outer 2 and the processing conditions. Can be improved.

Further, the lower end portion of the joint portion 18d is formed at substantially the same height in the vertical direction of the vehicle body as the lower end portion of the rear door 4 when the rear door 4 is closed, so that the side door 4 is closed when the side door 4 is closed. 4, the joint 18d can be concealed, and the second closed section 20 can be formed by the side sill reinforcement 18 without impairing the appearance. Even when the side door 4 is in the open state, the second closed cross section 20 bulges from the lower end of the joint 18d, so the lower end of the third lower flange 16b, the so-called cross section, is the second upper wall. It can oppose the part 18e. That is, by arranging the lower end cross section of the third lower flange 16b at the bent portion formed by the joint 18d and the second upper wall portion 18e, a boundary between the side sill outer 16 and the side sill reinforcement 18, a so-called division line, is formed. It can be made inconspicuous by integrating with the bent portion.

In addition, the third closed section 21 is a stepped portion projecting downward from the joint portion formed by the first lower flange 17b of the side sill inner 17 and the second lower flange 18b of the side sill reinforcement 18 on the lower side in the vertical direction of the vehicle body. Since it has 18g, both flange parts 17b and 18b can be hidden from the vehicle outer side, without providing another member.

Next, Example 2 will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structure similar to Example 1. FIG. FIG. 10 shows a cross-sectional view corresponding to FIG. 7 of the first embodiment.

The wheel house arch portion 8 includes a wheel house outer 14 located on the outer side in the vehicle width direction and a wheel house inner 15 located on the inner side in the vehicle width direction. The wheel house outer 14 and the wheel house inner 15 are joined to each other at both right and left ends and an upper end portion, and an accommodation space for accommodating the rear wheel 6 is formed in the central region.

As shown in FIG. 10, a side sill outer 16 and a side sill reinforcement 18 extend rearward in the vehicle body front-rear direction rear region. The rear end region of the side sill reinforcement 18 is in contact with the wheel house outer 14. That is, the second upper flange portion 18a and the second lower flange portion 18b are in contact with the outer side surface of the wheel house outer 14 in the vehicle width direction, and are joined to the wheel house inner 15 by triple welding.

The lower end portion 8b of the wheel house arch portion 8 is formed with a concave portion toward the inner side in the vehicle width direction, is disposed in contact with the second upper wall portion 18e of the side sill reinforcement 18, and the vehicle width of the joint portion 18d It is welded and joined in surface contact with the outer surface in the direction.

The first upper wall portion 18c has a two-stage structure of an upper wall and a lower wall below the upper wall, and is configured to expand the contact area with the wheel house arch portion 8. Also in the vehicle body front-rear direction rear region, the second closed cross-section portion 20 defined by the second upper wall portion 18e and the flat plate portion 18f is further closer to the vehicle than the boundary A serving as the outer end surface in the vehicle width direction of the rear wheel 6. It is configured to project outward in the width direction.

As shown in FIG. 11, a resin garnish 24 is installed on the outer side in the vehicle width direction of the lower end portion 8 b of the wheel house arch portion 8. The garnish 24 has a triangular prism shape, and is provided on the first surface portion 24a on the outer side in the vehicle width direction, the second surface portion 24b that forms the front end surface in the vehicle longitudinal direction, the third surface portion 24c that forms the rear end surface in the vehicle longitudinal direction, and on the inner side in the vehicle width direction. And a screw-like engaging portion 24d. The garnish 24 is attached to the vehicle body 1 by engaging the engaging portion 24d with the engaged portion 8e provided at the lower end portion 8b of the wheel house arch portion 8.

The first surface portion 24a has an upper end that is flush with the surface of the wheel house arch portion 8, and has a shape that protrudes outward in the vehicle width direction downward in the vehicle body vertical direction, and a lower end portion that faces the flat plate portion 18f. It is configured to be one.

Next, functions and effects of the main body structure according to the second embodiment will be described.
In the same manner as in the first embodiment, the side sill reinforcement 18 as a vehicle body constituting member forms the second closed cross section 20 as the bulging portion outside the outer boundary A in the vehicle width direction. Chipping of stones and stones can be blocked by the bulging part, and scattering of sand and stones to the side of the vehicle body can be prevented.

In addition, since the second closed cross section 20 bulges out from the outer boundary A in the vehicle width direction and the garnish 24 can protrude outward in the vehicle width direction even above the second closed cross section 20, It is possible to further reduce the traveling wind flowing into the vehicle and improve the aerodynamic characteristics. Moreover, since the shape of the garnish 24 can be arbitrarily changed, the appearance can be improved and the degree of freedom in design can be increased.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above-described embodiment, an example in which the side frame outer and the side sill outer are integrally formed has been described. be able to.

2) In the above-described embodiment, the example in which the second upper wall portion extends substantially horizontally has been described. However, it is sufficient that the second upper wall portion extends to the outside in the vehicle width direction so as to form at least a bulging portion. Even if it extends diagonally downward with the same, the same effect can be obtained.

3) In addition, those skilled in the art can implement the present invention by adding various modifications to the embodiments without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  INDUSTRIAL APPLICABILITY The present invention can be used for the entire side body structure having a side sill connected to the side body outer panel that forms the surface of the vehicle body side portion. In particular, the vehicle body rigidity is suppressed while suppressing chipping to the vehicle body side portion. It can be suitably used for automobiles that require improvement.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Side frame outer 4 Rear door 7 Side sill 8 Wheel house arch part 9 Front opening 10 Rear opening 16 Side sill outer 16a Third upper flange 16b Third lower flange 17 Side sill inner 17a First upper flange 17b First lower flange 18 Side sill rain Force 18a Second upper flange 18b Second lower flange 18d Joint 18e Second upper wall 18f Flat plate 18g Step 23 Flange 24 Garnish

Claims (7)

In a side body structure of an automobile having a side body outer panel that forms a surface of a vehicle body side portion, and a side sill that extends in the vehicle body longitudinal direction and is connected to the side body outer panel,
The side sill is interposed between the side sill outer provided at a lower portion of the side body outer panel, a side sill inner of the side sill outer in a vehicle width direction, the side sill inner and the side sill outer, and cooperates with the side sill inner. And a plate-like reinforcing member that forms a closed section,
The plate-like reinforcing member includes a substantially planar joint portion joined to the lower end portion of the side sill outer, and a bulging portion that bulges outward from the joint portion in the vehicle width direction. Side body structure. The side body outer panel has an opening to which a side door that can be opened and closed is mounted,
2. The side body structure of an automobile according to claim 1, wherein the bulging portion bulges outward in the vehicle width direction from a lower end portion of the side door in a closed state.   The side body structure of an automobile according to claim 1 or 2, wherein the side sill outer is integrally formed with the side body outer panel.   The side body structure of an automobile according to any one of claims 1 to 3, wherein the bulging portion has a flat plate portion extending in the vehicle body vertical direction on the outer side in the vehicle width direction. The side body outer panel is a surface that is substantially continuous with the side door between the wheel house portion and the side door when the side door is in a closed state, and a wheel house portion that accommodates a rear wheel in the vehicle body longitudinal direction rearward. And a wheel house arch part forming
The side portion of the automobile according to claim 4, wherein the wheel house arch portion includes a garnish that covers a lower end portion of the wheel house arch portion and forms a surface substantially continuous with the flat plate portion. Body structure.   The lower end part of the said joint part is formed in the vehicle body up-down direction substantially the same height as the lower end part of the said side door made into the closed state, The automobile of any one of Claims 2-5 characterized by the above-mentioned. Side body structure. The side sill has a flange portion composed of a lower end portion of the side sill inner and a lower end portion of the plate-like reinforcing member in a lower region of the closed cross section.
The side body of an automobile according to any one of claims 1 to 5, wherein the bulging portion has a step portion projecting downward from a lower end portion of the flange portion on a lower side in a vertical direction of the vehicle body. Construction.