JP2010188757A - 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 exterior appearance of an lower end boarder of a side sill outer while securing design flexibility. <P>SOLUTION: A second closed cross section 20 which projects toward the outside in a vehicle width direction from the third lower flange 16b of a side sill outer 16 and a lower end 11b is provided. Lower cross sections of the third lower flange 16b and the lower end 11b contact a second upper wall 18e. The second closed cross section 20 and a third closed cross section 21 are formed by a side sill reinforcement 18 of a frame member of a vehicle body. Thereby, a split line can be recognized integral with the second closed cross section 20, so that both the vehicle-body rigidity and the exterior appearance can be enhanced. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a side body structure of an automobile, and more particularly to a structure of a side sill connected to a side body outer panel that forms a surface of a lower part of a vehicle body.

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, there has been known a structure in which the volume of the appearance of the lower part of the vehicle body is increased in order to improve the appearance of the vehicle body side such as a sense of stability by visual recognition. In order to improve the appearance, a structure in which the side sill outer covering the outer side of the vehicle body is greatly extended outward in the vehicle width direction can be considered, but the following problems exist.

1stly, when the bulging part which protrudes largely in the vehicle width direction outer side is formed in a side sill outer, a steel plate part will increase significantly and a vehicle body weight will increase. This increase in the weight of the vehicle simultaneously increases costs. Secondly, there is a problem of car body formability. 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 are formed at the same time during molding by press working.

When performing press working, from the viewpoint of the fluidity of the steel sheet material, the end region of the member is inferior in plastic workability compared to the central region of the member. However, it becomes more noticeable as the processing amount increases. 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, processing problems such as cracking occur.

Therefore, as one of the methods to solve the above-mentioned problems while improving the appearance and expanding the design, a structure that attaches a side sill molding that covers the outside in the vehicle width direction to the side sill to increase the volume on the appearance of the lower part of the vehicle body. Are known. (Patent Document 1)

As shown in FIG. 13, 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 having a projecting portion composed of 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 improve the appearance without using a vehicle body rigid member. Furthermore, it is possible to prevent foreign substances such as sand from entering and accumulating between the side sill and the side sill molding while avoiding 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.

  However, in the configuration of the prior art, the lower portion of the side sill outer can be shortened and arranged in the so-called vertical direction of the vehicle body, but sufficient design freedom cannot be obtained. In other words, in order to hide the boundary between the lower end of the joint surface portion of the side sill outer and the side sill reinforcement, that is, the dividing line between the two, the lower end of the joint surface portion of the side sill outer is extended downward or the protruding portion of the side sill molding is extended upward. By doing so, it is necessary to arrange the dividing line inside the side sill molding, and the degree of freedom in design is restricted.

  In addition, when installing a side sill molding, it is necessary to newly design the side sill molding and add an additional assembly process, which causes problems in terms of costs other than material costs. Further, although the side sill molding can improve the appearance, it cannot contribute to the rigidity of the vehicle body in the case of improving the safety, which is a basic requirement of the vehicle.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a side body structure of an automobile capable of arranging the side sill outer in the upper and lower direction of the vehicle body and improving the appearance of the lower boundary portion of the side sill outer while ensuring the degree of design freedom. is there.

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 to be joined to the joint surface portion of the side sill outer, and a projecting portion projecting outward in the vehicle width direction from the joint surface portion, and an upper wall portion of the projecting portion is connected to a lower end of the joint surface portion. It is characterized by being provided at substantially the same height.

According to the first aspect of the present invention, since the protruding portion protrudes outward in the vehicle width direction from the bonding surface portion, the lower end of the bonding surface portion can be provided at substantially the same height as the upper wall portion of the protruding portion.

The invention of claim 2 has the side door which can be opened and closed in the invention of claim 1, wherein the lower end of the joint surface portion of the side sill outer and the lower end of the side door are provided at substantially the same height. And

According to a third aspect of the present invention, in the first or second aspect of the present invention, the projecting portion is formed on the plate-like reinforcing member and includes a bulging portion that bulges outward in the vehicle width direction from the joint surface portion. It is characterized by.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, when the side door is in a closed state, the side door includes a seal member that seals between the side door and the side sill. It has a sealing surface part which the said sealing member contact | abuts above a joint surface part, It is characterized by the above-mentioned.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the side body outer panel includes a wheel house portion that accommodates a rear wheel in the vehicle body front-rear direction rear, and the wheel house portion and the side door. And when the side door is in a closed state, a wheel house arch portion that forms a surface substantially continuous with the side door, and a lower end portion of the wheel house arch portion is substantially the same as a lower end of the joint surface portion It is provided at a height.

The invention of claim 6 is characterized in that, in the invention of claim 5, a garnish is provided which covers the lower end portion of the wheel house arch portion and is mounted on the upper wall portion of the protruding portion.

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the projecting portion projects outward from the outer boundary surface in the vehicle width direction of the rear wheel.

According to the first aspect of the present invention, the side sill outer can be arranged in the upper and lower direction of the vehicle body, and the appearance of the lower end boundary portion of the side sill outer can be improved while ensuring the design freedom of the projecting portion. That is, since the lower end of the joint surface portion of the side sill outer is provided at substantially the same height as the upper wall portion of the protruding portion, the user can visually recognize the boundary portion and the protruding portion as a unit. Thereby, the dividing line of the side sill outer can be made inconspicuous, and the appearance can be improved without extending the lower end of the side sill outer downward or extending the protruding portion of the side sill molding upward.

Also, even if the projecting part is formed by the frame member of the car body for the purpose of improving the car body rigidity, the boundary part can be visually recognized as one body with the projecting part by the constituent member of the car body, which improves the car body rigidity and the appearance. Can be compatible.

According to the invention of claim 2, since the lower end of the joint surface portion of the side sill outer and the lower end portion of the side door are provided at substantially the same height, when the side door is in the closed state, the joint surface portion of the side sill outer at the side door When the side door is in the open state, the user can visually recognize the boundary portion and the protruding portion as a single unit, so that the appearance can be further improved.

According to invention of Claim 3, since the said protrusion part is formed in the said plate-shaped reinforcement member and consists of a bulging part which bulges to the vehicle width direction outer side from the said joint surface part, it does not use a side sill molding. It is possible to increase the closed section of the side sill and improve the appearance while improving the rigidity of the vehicle body.

According to a fourth aspect of the present invention, the side sill outer has a seal surface portion with which the seal member of the side door abuts above the joint surface portion, so that the joint surface portion of the side sill outer is close to the lower end position of the side door. Even when positioned above the vehicle body, it is possible to achieve both improvement in appearance and securing of door sealability.

According to invention of Claim 5, since the lower end part of a wheel house arch part is provided in the substantially same height as the lower end of the said joint surface part, the lower end part of a wheel house arch part and the lower end of the said joint surface part, what is called a protrusion part The upper wall portion can be continuous with the parting line of the side door, and the appearance can be further improved.

According to the sixth aspect of the present invention, since the garnish that covers the lower end portion of the wheel house arch portion and is mounted on the upper wall portion of the projecting portion is provided, the side sill outer is provided regardless of the design of the wheel house arch portion. The joining surface portion and the dividing line can be covered with garnish, and the appearance can be improved.

According to invention of Claim 7, since the said protrusion protrudes outside from the vehicle width direction outer side boundary surface of a rear-wheel, the chipping suppression by driving | running | working of a vehicle and the driving | running | working which flows in into a wheel house are carried out. Aerodynamic characteristics can be improved by reducing wind.

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 the garnish attachment part in Example 2. FIG. 7 is a cross-sectional view corresponding to FIG. 6 in Example 3. FIG. 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 body front-rear 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 by press forming after blanking from a long steel plate having a predetermined thickness, for example, 1.4 mm. 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. At the lower end portion of the side sill 7, 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.

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 vehicle body vertical direction to the lower end portion of the substantially planar joining portion 18d, and the lower section of the lower end portion 11b is disposed in contact with the second upper wall portion 18e. ing. 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 exists continuously on the extension of the lower end portion 11b in the longitudinal direction of the vehicle body, and the third lower flange portion 16b and the lower end portion 11b correspond to the joint surface portion of the present invention. Yes.

The third lower flange portion 16b extends downward in the vehicle body vertical direction to the lower end portion of the substantially planar joining portion 18d, and the lower section of the third lower flange portion 16b is disposed in contact with the second upper wall portion 18e. ing. 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. With this configuration, the lower cross section of the third lower flange portion 16b, that is, a so-called dividing line, can be visually recognized as an integral part of the starting portion of the second closed cross section 20 and the so-called bent line.

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 cross section of the lower end portion 11b, that is, the lower cross section of 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 in a closed state, the lower end portion of the rear door 4 has a bulging portion formed of a part of the second closed cross-section portion 20 of the side sill 7 and the third closed cross-section portion 21 between the road surface. It is in an intervening state.

A weather strip 4c that prevents water or 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 in the closed state, the weather strip 4c is formed at the outer end of the overhanging portion 16c. The seal part 25 is contacted to ensure 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 triple joined.

As shown in FIG. 8, the surfaces that can be confirmed in plan view are the side sill outer 16, the seal portion 25, 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. That is, the lower cross section of the lower end portion 8 b is configured to be continuous with the parting line of the rear door 4.

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, also in the 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.
A second closed cross-section portion 20 is provided that projects outward from the third lower flange portion 16b and the lower end portion 11b of the side sill outer 16 in the vehicle width direction, and a lower cross-section between the third lower flange portion 16b and the lower end portion 11b, so-called dividing line. Is brought into contact with the second upper wall portion 18e constituting the second closed cross-section portion 20, the dividing line of the side sill outer 16 can be made inconspicuous, and the appearance can be improved.

In addition, by arranging the side sill outer 16 in the upper and lower direction of the vehicle body, the bulging portion can be formed by the side sill reinforcement 18 instead of the side sill outer 16, and the degree of freedom in design of the bulging portion can be increased. It becomes possible.

Further, since the second closed cross-section portion 20 and the third closed cross-section portion 21 are formed by the side sill reinforcement 18 that is a frame member of the vehicle body, the dividing line can be visually recognized as an integral part of the second closed cross-section portion 20, Both vehicle body rigidity and appearance can be improved.

Furthermore, since the lower cross section of the third lower flange portion 16b and the lower end portion 11b and the lower end portion of the rear door 4 are provided at substantially the same height, when the rear door 4 is closed, the rear door 4 joins the side sill outer 16 with each other. When the rear door 4 is in an open state, the user can visually recognize the dividing line and the second closed cross-section portion 20 as one body.

Moreover, since the second closed cross-section portion 20 is formed in the side sill reinforcement 18 and bulges outward from the third lower flange portion 16b and the lower end portion 11b in the vehicle width direction, a separate member such as a side sill molding is used. Accordingly, the area of the closed cross section formed in the side sill 7 can be increased, the vehicle body rigidity can be improved, chipping can be suppressed and aerodynamic characteristics can be improved.

Further, since the side sill outer 16 has a seal portion 25 that abuts the weather strip 4c of the rear door 4 on the outer end portion of the so-called overhang portion 16c above the third lower flange portion 16b, the third lower flange portion 16b is arranged on the rear door. Even when the position is closer to the lower end position of the vehicle body 4 and closer to the upper side of the vehicle body, it is possible to achieve both improvement in appearance and ensuring sealing performance.

Since the lower end portion 8b of the wheel house arch portion 8 is provided at substantially the same height as the lower cross section of the third lower flange portion 16b and the lower end portion 11b, the second lower end portion 8b and the second closed cross section portion 20 are configured. The upper wall portion 18e can be continuous with the parting line of the rear door 4, and the appearance can be improved.

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 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 triple joined.

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 23a 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, regardless of the design of the wheel house arch portion 8, the joint surface portion and the dividing line of the side sill outer 16 can be covered with the garnish 24, and the appearance can be improved.

Next, Example 3 will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to Example 1. FIG. 12 shows a cross-sectional view corresponding to FIG. 6 of the first embodiment.

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, a side sill reinforcement 18, The side sill reinforcement 18 is composed of a resin side sill molding 26 mounted on the outer side in the vehicle width direction.

The substantially hat-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.

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, continues to the outer end of the first upper wall portion 18c, and extends vertically in the vehicle body. A substantially planar side wall portion 18h extending downward, and a lower wall portion 18i extending inward in the vehicle width direction from the lower end portion of the side wall portion 18h and continuing to the upper end portion of the second lower flange portion 18b. The first upper wall portion 18c, the side wall portion 18h, and the lower wall portion 18i form surfaces extending in the vehicle body front-rear direction. The side sill reinforcement 18 and the side sill inner 17 form a fifth closed section 27 that extends in the longitudinal direction of the vehicle body.

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 center portion of the substantially planar side wall portion 18h, and is welded and joined in surface contact with the vehicle width direction outer side surface of the side wall portion 18h.

The side sill molding 26 extends from the lower end of the rear door 4 to the outside in the vehicle width direction and extends outward from the lower end of the rear door 4. The side sill molding 26 continues to the vehicle width direction outside of the upper wall molding 26 a and extends substantially downward in the vehicle body vertical direction. -Shaped side wall molding 26b, a lower wall molding that protrudes from the lower end of the side wall molding 26b downward in the vehicle body vertical direction and extends to the second lower flange 18b from the lower end of the second lower flange 18b. Part 26c. The side sill molding 26 is attached to the vehicle body using screws (not shown) at the front and rear end portions and the middle portion in the vehicle body direction.

The upper end of the upper wall molding 26a is configured such that the inner front end in the vehicle width direction contacts the surface of the side wall 18h and also contacts the lower cross section of the third lower flange 16b of the side sill outer 16. The lower wall molding portion 26c is configured such that the upper surface of the lower wall molding portion 26c is in surface contact with the lower surface of the lower wall portion 18i in the vehicle width direction inner portion. In this embodiment, the side sill molding 26 corresponds to the protruding portion of the present invention.

Next, functions and effects of the main vehicle body structure related to the third embodiment will be described.
As in the first embodiment, the side sill molding 26 protrudes from the lower end of the rear door 4 to the outside, so that chipping such as sand and stones caused by running of the vehicle is blocked by the bulging portion, and sand to the side of the vehicle body Can prevent scattering of stones and stones.

Further, since the upper wall molding portion 26 a abuts on the lower cross section of the third lower flange portion 16 b of the side sill outer 16, the lower cross section of the third lower flange portion 16 b can be visually recognized as an integral part of the side sill molding 26.

Moreover, since the side sill molding 26 can protrude outward in the vehicle width direction in front of the rear wheel 6, the traveling wind flowing into the wheel house can be further reduced, and an improvement in aerodynamic characteristics can be expected. Moreover, since the shape of the side sill molding 26 can be arbitrarily changed, 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 third lower flange of the side sill outer extends in the vertical direction of the vehicle body and contacts the protruding portion. However, at least the lower section (dividing line) of the third lower flange is integrated with the protruding portion. The same effect can be obtained even if the lower cross section of the third lower flange and the protruding portion are separated by a minute distance, and the third lower flange extends obliquely downward at a predetermined angle. Can be played.

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 side part of the vehicle body, and in particular, it is required to improve the appearance of the lower boundary portion of the side sill outer. It can be suitably used for automobiles.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Side frame outer 4 Rear door 4c Weather strip 6 Rear wheel 7 Side sill 8 Wheel house arch part 8b Lower end part 16 Side sill outer 16b Third lower flange 16c Overhang part 17 Side sill inner 18 Side sill reinforcement 18c Upper wall part 18d Joining Portion 18e second upper wall portion 18f flat plate portion 18g step portion 18h side wall portion 20 second closed cross-section portion 23 flange portion 24 garnish 25 seal portion 26 side sill molding 26a upper wall molding portion 26b side wall molding portion 26c lower wall molding portion

The side body structure of an automobile according to any one of claims 1 to 6, wherein the projecting portion projects outward from the outer boundary surface in the vehicle width direction of the rear wheel.

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 the vehicle width direction, the side sill inner and the side sill outer, and a joint surface portion of the side sill outer. And a plate-like reinforcing member to be joined, and a protruding portion that protrudes outward in the vehicle width direction from the joint surface portion,
The side wall structure of an automobile, wherein the upper wall portion of the protruding portion is provided at substantially the same height as the lower end of the joint surface portion. It has side doors that can be opened and closed,
The side body structure of a vehicle according to claim 1, wherein a lower end of the joint surface portion of the side sill outer and a lower end portion of the side door are provided at substantially the same height.   The side part of the automobile according to claim 1, wherein the projecting part is formed on the plate-like reinforcing member and includes a bulging part that bulges outward in the vehicle width direction from the joint surface part. Body structure. The side door has a seal member that seals between the side door and the side sill when closed.
4. The side body structure of an automobile according to claim 2, wherein the side sill outer has a seal surface portion with which the seal member abuts above the joint surface portion. 5. The side body outer panel is substantially continuous with the side door when the side door is in a closed state between a wheel house part that houses a rear wheel in the rearward direction of the vehicle body and the wheel house part and the side door. A wheel house arch part forming a surface,
The side body structure of the automobile according to any one of claims 1 to 4, wherein a lower end portion of the wheel house arch portion is provided at substantially the same height as a lower end of the joint surface portion.   The side body structure of a vehicle according to claim 5, further comprising a garnish that covers a lower end portion of the wheel house arch portion and is mounted on an upper wall portion of the protruding portion.   The side body structure of an automobile according to any one of claims 1 to 6, wherein the projecting portion projects outward from the outer boundary surface in the vehicle width direction of the rear wheel.