JP4427166B2 - Body side structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle body side part structure, and more particularly to a vehicle body side part structure including a front pillar and a side rail continuously formed on the front pillar.
[0002]
[Prior art]
In automobiles, front pillars extending in the vertical direction are provided at the left and right front portions of the passenger compartment, and the lower ends of the front pillars are joined to the front ends of side sills extending in the front-rear direction along the side edges of the floor, and the upper parts An upper that is inclined rearward and whose upper end is joined to the front end of the side rail that extends along the side of the roof panel, and is arranged in the front part of the front pillar in the front-rear direction along the upper edge of the front apron. The rear ends of the side frames are joined.
[0003]
For example, when an impact load acts on the front part of the vehicle body from the front due to a frontal collision or the like, the load is input from the rear end to the front part of the front pillar via the upper side frame or the like, and the load is applied from the upper part of the front pillar to the side rail. It is transmitted to the front end, and is distributed and transmitted from the side rail to the entire vehicle body via a roof or the like.
[0004]
However, the front pillar and the side rail are joined by being bent or bent, and the front rail extending in the vehicle width direction is joined to the joined portion, so that the cross-sectional shape changes greatly and the discontinuous portion changes suddenly in rigidity. Therefore, when an impact load of a predetermined value or more is input to the front pillar from the upper side frame or the like, stress concentrates on the vicinity of the joint between the front pillar and the side rail and the part is deformed. Thus, load transmission from the smooth front pillar to the side rail is hindered, and there is a concern about the influence on the passenger compartment due to the deformation of the front pillar.
[0005]
As a countermeasure, for example, as disclosed in Japanese Patent Laid-Open No. 5-124540, a pillar ring hose is provided in a front pillar composed of a front pillar inner and a front pillar outer, and the upper end of the pillar ring hose is connected to the side rail inner and side A large extension in the side rail formed by the rail outer, a little extension of the upper end of the front pillar inner into the side rail, and extension of the front end of the side rail inner into the front pillar It has been proposed to ensure the rigidity of the joint.
[0006]
[Problems to be solved by the invention]
According to Japanese Patent Laid-Open No. 5-124540, the upper ends of the pillar ring hose and the front pillar inner are extended to the inside of the side rail by changing their lengths, and the front end of the side rail inner is inserted into the front pillar. A sudden change in rigidity is suppressed by gradually increasing or decreasing the number of panel wraps in the section.
[0007]
However, the rigidity of the part where the number of laps changes, for example, the part where the number of panels changes from one to two, etc. suddenly changes. For example, when an impact load is applied to the front pillar from the front, stress is applied to the part. There is a possibility that deformation such as twisting, bending, buckling, and the like of the front pillar is induced in a concentrated manner, and the distributed transmission of the impact load to the side rail and the rear part of the vehicle body through the front pillar may not be sufficiently achieved.
[0008]
In addition, although it is possible to satisfy the required rigidity by placing phosphorus hoses inside and outside the joint between the front pillar and side rail, the structure becomes complicated and the assembly work becomes complicated, and the weight of the vehicle increases. It becomes a factor to invite
[0009]
Accordingly, an object of the present invention made in view of such a point is to enable a smooth load transmission from the front pillar to the rear part of the vehicle body by suppressing discontinuity in rigidity without causing a complicated structure and an increase in the vehicle body weight. It is in providing the vehicle body side part structure to perform.
[0010]
[Means for Solving the Problems]
The vehicle body side part structure according to claim 1, which achieves the above object, is a closed cross section formed by joining a side edge of a front pillar outer and a side edge of a front pillar inner extending obliquely in the longitudinal direction of the vehicle body. and the front pillar shape, and the side edges of the front pillar outer upper end continuously formed by being coupled to the upper end of the side edge and the front pillar inner of Saidore luer songs extending in the vehicle longitudinal direction the side rail inner of In the vehicle body side structure including the front pillar formed by joining and a side rail continuous to the front pillar, the side rail inner portion is inserted into the front pillar with the front range fitted into the front pillar inner portion, the side edges of the part range is joined is sandwiched between the side edges of the front pillar outer and a front pillar inner, or one in the front within the pillar Wherein the section modulus decreases as the process proceeds to the end.
[0011]
According to the first aspect of the present invention, both side edges of the front range of the side rail inner are sandwiched between the side edges of the front pillar outer and the front pillar inner and inserted into the front pillar, whereby the coupling strength between the front pillar and the side rail is obtained. The section modulus of the front pillar gradually increases as it moves from the lower part of the front pillar to the side rail, and the rigidity of the front pillar is increased. Discontinuity is suppressed. Therefore, the impact load from the front acting on the front end of the front pillar can be reliably transmitted to the side rail via the front pillar, and can be smoothly distributed and transmitted to the rear portion of the vehicle body via the side rail.
[0012]
The vehicle body side structure according to claim 2, which achieves the above object, has a substantially U-shaped cross section having a side edge of the front pillar outer, an inner surface portion, and side portions bent along both sides of the inner surface portion. to a front pillar of the closed section formed by joining a side edge of the C-shaped front pillar inner, side of Saidore luer song are successively formed on the upper end of the front pillar outer extending in the longitudinal direction of the vehicle body Extending in the longitudinal direction of the vehicle body with a substantially U-shaped or C-shaped cross section having an edge and a side surface portion joined to the upper end portion of the front pillar inner and bent along the both sides of the inner surface portion in the vehicle body side structure that includes a side rail that is formed by joining a side edge of the side rail inner to continuous to the front pillar, the side rail inner, the fitting front range in the front pillar inner engagement Is inserted into the front pillar, and with the opposite side edges of the front range is joined is sandwiched between the side edges of the front pillar outer and a front pillar inner, the front fitted to the front pillar inner It is inserted into the pillar, and the inner surface portion the width of the side portion is decreased in accordance with the process proceeds to the front end in the front pillar and wherein the away from the inner surface of the front pillar inner.
[0013]
According to the invention of claim 2, both side edges of the front region of the side rail inner are sandwiched between the side edges of the front pillar outer and the front pillar inner and are fitted into the front pillar inner and inserted into the front pillar, and The width of the side part decreases as it moves to the front end in the front pillar, and the inner surface part moves away from the inner surface part of the front pillar inner, so the front pillar section modulus is maintained while maintaining the coupling strength between the front pillar and the side rail. Is gradually increased from the lower part of the front pillar to the side rail side, discontinuity in rigidity of the front pillar is suppressed, and the impact force from the front acting on the front end of the front pillar is reliably Is transmitted to the rail and smoothly distributed to the rear of the vehicle body via the side rail. Can.
[0014]
In addition, because the front rail side inner end is extended to the front pillar and the inner surface is gradually separated from the inner surface of the front pillar inner, the weight of the vehicle can be increased due to the complexity of the structure and the addition of a phosphorus hose. The above object can be effectively achieved without incurring an increase in.
[0015]
According to a third aspect of the present invention, in the vehicle body side part structure according to the second aspect, the front end of the side rail inner is formed substantially in the same plane as a straight line connecting the side edges of the side rail inner. And
[0016]
According to the invention of claim 3, by making the inner surface portion substantially coincide with the straight line connecting the both side edges at the front end of the side rail inner, the section modulus of the portion becomes smaller and the discontinuity in rigidity of the front pillar becomes more effective. And can function as a separator that partitions the front pillar into a plane, and the deformation of the front pillar is more reliably suppressed by the tension of the separator.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a vehicle body side structure according to the present invention will be described with reference to FIGS. In the figure, an arrow F indicates the vehicle body front direction, and IN indicates the vehicle body inward in the vehicle width direction.
[0018]
FIG. 1 is a side view of a vehicle body 1. Front pillars 10 extending in the vertical direction are provided on the front left and right sides of the passenger compartment, and the lower ends of the front pillars 10 extend in the front-rear direction along the lower side edges of the vehicle body. The upper part of the front pillar 10 located on both sides of the windshield 4 extends at an incline so that the upper part of the front pillar 10 located on both sides of the windshield 4 moves upward and slightly inward of the vehicle body as it moves upward. The upper end is joined to the front end of the side rail 20 extending in the front-rear direction along the side edge of the roof panel 4.
[0019]
The joint between the upper end of the front pillar 10 and the side rail 20 is shown in FIG. 2 which shows a perspective view of part A of FIG. 1 with the roof panel 4 omitted, and the exploded perspective view of FIG. The front pillar inner 11 and the front pillar outer 15 are formed, and the side rail inner 21 and the side rail outer 25 are formed. The front pillar outer 15 and the side rail outer 25 are integrally formed by the outer panel 30. . Further, a phosphorus hose side rail outer 35 that fits along the inner surface of the side rail outer 25 is provided.
[0020]
In FIG. 1, a indicates the range in which the front pillar inner 11 extends, b indicates the range in which the side rail inner 21 extends, and FIGS. 4 (a), 4 (b), and 4 (c) are respectively in FIG. The cross-sectional shape of the front pillar 10 and the side rail 20 in a II, II-II, and III-III line cross section is shown.
[0021]
As the upper portion of the front pillar inner 11 moves upward in an approximately U-shaped or C-shaped cross section having an inner surface portion 12 and a side surface portion 13 bent outward along both sides of the inner surface portion 12. A front rail that extends at an incline so as to be shifted to the rear of the vehicle body and slightly inward of the vehicle body, and projects inward along the front edge of the roof panel 4 continuously to the inner surface portion 12 and the side surface portion 13 in the vicinity of the upper end. An inner 14 is formed, and a flange 13 a is bent at the edge of the side surface 13 and the side edge of the front rail inner 14.
[0022]
The side rail inner 21 extends in the longitudinal direction of the vehicle body with a substantially U-shaped or C-shaped cross section having an inner surface portion 22 and a side surface portion 23 bent outward along both sides of the inner surface portion 22. The flange 23 a is bent at the side edge of the side surface portion 23.
[0023]
The front region 21A of the side rail 21 is fitted to the front pillar inner 11 and a flange 23a formed on the side surface portion 23 can be overlapped with the flange 13a of the front pillar inner 11, and at least the inner surface portion 22 and the side surface portion. 23 is fitted and overlapped with the upper edge of the front pillar inner 11, that is, the upper end portions 12 b and 13 b of the inner surface portion 12 and the side surface portion 13, and in the fitted state, the width of the side surface portion 23 gradually increases as it moves to the front end 21 a side. As w decreases, the inner surface portion 22 is gradually separated from the inner surface portion 12 of the front pillar inner 11, and is formed so as to be substantially flush with the straight line connecting the flanges 23a at the front end 21a.
[0024]
In other words, the inner surface portion 21 is formed so as to gradually approach a straight line connecting both flanges 23a as it moves to the front end 21a side, and the section coefficient of the side rail inner 21 is gradually decreased.
[0025]
The front pillar outer 15 has an outer surface portion 16 and a side surface portion 17 bent inward along both sides of the outer surface portion 16, and has a substantially U-shaped or C-shaped cross section. In addition, the flange 17a is bent and formed at the side edge of the side surface portion 17 so as to be shifted inward of the vehicle body and facing the flange 13a formed on the front pillar inner 11.
[0026]
The side rail outer 25 continuously formed on the front pillar outer 15 has a substantially U-shaped cross section having an outer surface portion 26 and a side surface portion 27 continuously formed on the outer surface portion 16 and the side surface portion 17 of the front pillar outer 15, respectively. It is C-shaped and extends in the longitudinal direction of the vehicle body, continues to the flange 17a formed on the front pillar outer 15 along the side edge of the side surface portion 27, and faces the flange 23a formed on the side rail inner 21. The flange 27a is bent.
[0027]
The phosphorus hose side rail outer 35 is formed by bending the side rail outer 25 and the outer surface portion 36 extending along the outer surface portions 26 and 16 of the front pillar outer 15 and both side edges of the outer surface portion 36. The front pillar outer 15 and the side rail outer 25 have a substantially U-shaped or C-shaped cross section having side surface portions 37 extending along the side surface portions 27, 17 of the front pillar outer 15. A flange 37a that can be superposed is formed on the flanges 17a and 27a.
[0028]
Then, at the joint portion between the front pillar 10 and the side rail 20, the front range 21A of the side rail inner 21 is fitted on the upper portion of the front pillar inner 11 as shown in FIG. The flange 23a of the side rail inner 21 is overlapped, and the inner surface portion 12 of the front pillar inner 11 and the upper end portions 12b and 13b of the side surface portion 13 and the inner surface portion 22 and the side surface portion 23 of the side rail inner 21 are joined together. The pillar inner 11 and the side rail inner 21 are integrally coupled.
[0029]
The flange 37a of the phosphorus hose side rail outer 35 is overlapped on the flanges 13a, 23a of the front pillar inner 11 and the side rail inner 21 that are integrally coupled, and the front pillar outer 15 and the side of the flange 35a of the phosphorus hose side rail outer 35 are further overlapped. The flanges 17a and 27a of the rail outer 25 are overlapped.
[0030]
Then, the front pillar inner 11, the front range 21 </ b> A of the side rail inner 21, the phosphorus hose side rail outer 35, and the flanges 13 a, 23 a, 37 a, and 17 a of the front pillar outer 15 are joined to each other to join the front pillar inner 11. The front pillar outer 15 forms the front pillar 10 having a closed cross-sectional shape that is inclined and continuously moved upward as it moves rearward.
[0031]
Similarly, the flanges 23a, 37a, and 27a of the side rail inner 21, the phosphorus hose side rail outer 35, and the side rail outer 25 that are overlapped with each other are joined to the front pillar 10 and continuously closed in the front-rear direction. The rail 20 is formed. In addition, in order to secure the bonding strength by spot welding in joining each flange, an appropriate notch or the like is formed in the joining portion, and the number of overlapping flanges in the joining portion is set to 3 or less, and the pressure and current by spot welding are set. It is preferable to ensure the density.
[0032]
According to the vehicle body side structure thus formed, the flange 23a formed in the front end range 21A of the side rail inner 21 is between the flanges 17a and 13a formed on the side edges of the front pillar outer 15 and the front pillar inner 11. While being sandwiched, it is fitted into the front pillar inner 11 and inserted into the front pillar 10, and the coupling strength between the front pillar 10 and the side rail 20 is ensured.
[0033]
Further, the width w of the side surface portion 23 gradually decreases as it moves toward the front end 21 a in the front pillar 10, the inner surface portion 22 gently separates from the inner surface portion 13 of the front pillar inner 11, and the inner surface portion 22 at the front end 21 a. Is formed in a flat plate shape that substantially coincides with the straight line connecting the flanges 23a. As a result, the sectional modulus of the side rail inner 21 gradually decreases in the front pillar 10 as it moves toward the front end 21a. Is gradually increased from the lower side of the front pillar 10 to the side rail 20 side, and a sudden change portion in rigidity of the front pillar 10, that is, a discontinuity in rigidity is suppressed.
[0034]
The front rail 21 functions as a separator that partitions the front pillar 10 in a plane at the front end 21a, and the front pillar inner 11 and the front pillar outer 15 of the front pillar 10 are stretched, compressed, and bent by the tension of the front end 21a. Further, the rigidity against torsion and the like is improved, and deformation of the front pillar 10 is suppressed.
[0035]
Therefore, for example, when an impact load acts on the front part of the vehicle body from the front and the impact load is applied to the front pillar 10 via the upper side frame or the like, the front pillar 10 is prevented from being deformed such as torsion, bending and buckling. As a result, the impact load is smoothly transmitted to the side rail 20 via the front pillar 10 and can be efficiently distributed and transmitted to the rear part of the vehicle body, so that the impact energy is effectively absorbed and the safety is improved.
[0036]
Further, the front end range 21A of the side rail inner 21 is extended into the front pillar 10 so that the inner surface portion 22 is gradually separated from the inner surface portion 12 of the front pillar inner 11. Compared to the stiffening structure, the complexity of the structure and the increase in the weight of the vehicle body are avoided, and the complexity of the vehicle body assembly work is avoided, and the efficiency of the vehicle body assembly work and the reduction of the vehicle weight are brought about. Furthermore, it is not necessary to significantly change the existing vehicle body structure, and the vehicle body design cost can be reduced.
[0037]
In the above-described embodiment, the front pillar outer 15 and the side rail outer 25 are integrally formed. However, the front pillar outer 15 and the side rail outer 25 may be formed individually, or may be inserted into the front pillar 10. The present invention is not limited to the above-described embodiment, such as appropriately setting the length of the front range 21A of the rail inner 21 according to the required rigidity, and various changes can be made without departing from the spirit of the invention.
[0038]
【The invention's effect】
According to the vehicle body side structure of the present invention described above, both side edges of the front rail range of the side rail inner are sandwiched between the side edges of the front pillar outer and the front pillar inner and inserted into the front pillar, and in the front pillar. With a simple structure that reduces the section modulus as it moves to the front end, while maintaining the coupling strength of the front pillar and the side rail, the section factor of the front pillar is gradually increased from the bottom to the side rail side, The front pillar's rigidity discontinuity is suppressed and deformation of the front pillar when a load is applied is avoided, and the impact load acting on the front pillar from the front is smoothly distributed and transmitted to the rear part of the vehicle body via the side rail. Can improve safety.
[0039]
In addition, it has a simple shape that extends the front range of the side rail inner to the front pillar and gradually separates the inner surface of the side rail inner from the inner surface of the front pillar inner to reduce the section modulus. This makes it possible to improve the efficiency of manufacturing the vehicle body and reduce the vehicle body weight without complicating the structure and increasing the vehicle body weight, and reducing the design cost of the vehicle body without significantly changing the conventional vehicle body structure.
[Brief description of the drawings]
FIG. 1 is a side view of a front portion of a vehicle body showing an outline of an embodiment of a vehicle body side portion structure according to the present invention.
FIG. 2 is a perspective view of a main part of part A in FIG.
FIG. 3 is an exploded perspective view of FIG. 2;
4A, 4B, and 4C are cross-sectional views of a front pillar and a side rail, respectively, taken along lines II, II-II, and III-III in FIG.
FIG. 5 is a perspective view showing a coupled state of a front pillar inner and a side rail inner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Car body 10 Front pillar 11 Front pillar inner 12 Inner surface part 12b Upper end part 13 Side surface part 13a Flange (side part)
13b upper end 15 front pillar outer 16 outer surface 17 side surface 17a side surface 20 side rail 21 side rail inner 21A front region 21a front end 22 inner surface 23 side surface 23a flange (side edge)
25 Side rail outer 26 Outer surface 27 Side surface 27a Flange (side edge)
30 Outer panel 35 Lynn hose side rail outer w Width

Claims (3)

A front pillar having a closed cross section formed by joining a side edge of a front pillar outer and a side edge of a front pillar inner extending obliquely in the longitudinal direction of the vehicle body;
Formed by joining a side edge of the front pillar outer upper end continuously formed by being coupled to the upper end of the side edge and the front pillar inner of Saidore luer Songs extending in the vehicle longitudinal direction the side rail inner of In the vehicle body side structure with a side rail that continues to the front pillar,
The side rail inner is
Is inserted into the front pillar front range is fitted to the front pillar inner, the both side edges of said front range is joined is sandwiched between the side edges of the front pillar outer and a front pillar inner, One or The vehicle body side structure, wherein the section modulus decreases as the front pillar moves to the front end. Formed by joining the side edge of the front pillar outer and the side edge of the front pillar inner having a substantially U-shaped or C-shaped cross section having an inner surface and side surfaces bent along both sides of the inner surface. A closed pillar shaped front pillar,
Bent along both sides of the inner surface and the inner surface portion is joined with the side edges of Saidore luer Songs extending in the vehicle longitudinal direction are continuously formed on the upper end of the front pillar outer, an upper end portion of the front pillar inner A vehicle body comprising a side rail formed by joining a side edge of a side rail inner which is formed in a substantially U-shaped or C-shaped cross section having a side surface portion and extends in the longitudinal direction of the vehicle body, and is continuous with the front pillar. In the side structure,
The side rail inner is
Front range is fitted to the front pillar inner is inserted into the front pillar, and with the opposite side edges of the front range is joined is sandwiched between the side edges of the front pillar outer and a front pillar inner , fitted to the front pillar inner is inserted into the front pillar, and the inner surface portion the width of the side portion is decreased in accordance with the process proceeds to the front end in the front pillar away from the inner surface of the front pillar inner A vehicle body side structure characterized by: The front end of the side rail inner is
Vehicle body side structure according to claim 2, characterized in that the inner surface portion is formed in a straight line substantially the same plane connecting the opposite side edges of the side rail inner.

Images