JP2007253786A - Side part body structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side part body structure of an automobile capable of certainly transmitting impact force in head-on collision to the rear of the body while avoiding an influence to a car room in side collision. <P>SOLUTION: A locker reinforce 9 is formed to be positioned at a rear side part of a connecting part 11 with at least a pillar reinforce 7 from the automobile front end part 9b, bearing force of the pillar reinforce 7 against the impact force of the connecting part 11 is made larger than the rear side part of the connecting part 11 of the locker reinforce 9 and the rear side part of the connecting part 11 of the locker reinforce 9 is deformed to the indoor side in the side collision. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a side body structure of an automobile in which a rocker panel extending in a vehicle longitudinal direction is coupled with a lower end portion of a center pillar extending in a vehicle vertical direction.

In automobiles, an impact force absorbing structure for suppressing the influence on the passenger compartment at the time of a side collision is adopted. For example, in Patent Document 1, by dividing the front portion and the rear portion of the joint portion of the rocker inhose with the pillar rein hose, respectively, the lower end portion of the center pillar at the side collision has the upper end portion as a fulcrum. There has been proposed a structure that enters the inside of the car like a pendulum.
Japanese Patent No. 3637141

  By the way, when adopting a structure that divides the front and rear parts of the joint between the rocker in hose and the pillar rein hose as in the conventional side body structure, it is effective at the time of a side collision, At the time of a collision, there is a problem that the rocker panel is bent and deformed at the divided portion, and the impact force from the front of the vehicle cannot be reliably transmitted to the rear of the vehicle body.

  Further, in the above conventional structure, the front and rear portions of the joint portion of the rocker inhose are divided, so that depending on the impact force, the amount of the rocker inn hose entering the passenger compartment increases, There is a concern that the torsional rigidity of the rocker panel with respect to the input to the vehicle body may decrease.

  The present invention has been made in view of the above-described conventional situation, and can reliably transmit the impact force at the time of a frontal collision to the rear of the vehicle body while avoiding the influence on the passenger compartment at the time of a side collision. An object of the present invention is to provide a side body structure of an automobile capable of ensuring torsional rigidity.

  According to the first aspect of the present invention, there is provided a side body of an automobile in which a lower end portion of a pillar rein hose disposed in a center pillar extending in a vehicle vertical direction is coupled to a rocker in hose disposed in a rocker panel extending in a vehicle longitudinal direction. In the structure, the rocker inhose is formed so as to extend from the front part of the rocker panel to at least the rear part of the joint part with the pillar rein hose, and the resistance against the impact force of the joint part of the pillar rein hose is It is characterized in that it is larger than the yield strength of the rear portion of the joint portion of the rocker inhose, and the rear portion of the joint portion of the rocker inhose is deformed to the vehicle interior at the time of a side collision.

  A second aspect of the present invention is characterized in that, in the first aspect, a bulkhead for increasing the cross-sectional rigidity in the vehicle width direction of the coupling portion is disposed at the rear portion of the coupling portion of the rocker inhose.

  According to the side body structure of the first aspect of the present invention, the rocker inhose is formed so as to extend from the front part of the rocker panel to at least the rear side part of the joint with the pillar rein hose, The proof strength of the rocker in-hose is greater than the proof strength of the rear part of the joint of the rocker inhose. Therefore, the center pillar can be prevented from being bent and deformed toward the passenger compartment, and the influence on the passenger compartment can be suppressed.

  Further, since the above-mentioned rocker inn hose extends from the front part of the rocker panel to at least the rear side part of the joint part with the pillar rein hose, the impact force at the time of frontal collision is from the front part of the rocker inn hose to the center pillar. The vehicle is reliably transmitted to the rear of the vehicle body via the coupling portion, and the influence on the passenger compartment due to the rocker panel being bent and deformed in the middle can be avoided.

  Furthermore, since the above-mentioned rocker inn hose is arranged from the front part of the rocker panel to the rear side part from the coupling part with the pillar rein hose without being divided in the middle, the rocker inn for the input to the vehicle body during traveling The torsional rigidity of the panel can be increased.

  In the invention of claim 2, since the bulkhead is arranged at the rear part of the joint part of the rocker inhose, the cross-sectional rigidity in the vehicle width direction of the joint part can be increased, and the deformation at the rear part from the joint part of the rocker panel Can be surely triggered.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  1 to 4 are views for explaining a side body structure of an automobile according to an embodiment of the present invention. FIG. 1 is a side view of the side body of the automobile, and FIG. 2 is a center pillar and a rocker panel. FIG. 3 is a cross-sectional view of the coupling portion (cross-sectional view along the line III-III of FIG. 1), and FIG. 4 is a deformation of the side vehicle body at the time of a side collision. It is a schematic diagram which shows a state.

  In the figure, reference numeral 1 denotes a side body of an automobile, which is connected to the front end of a roof side rail 3 extending in the longitudinal direction of the vehicle body by connecting the front end of the front pillar 2 extending in the vertical direction of the vehicle. The front end portion of the rocker panel 4 extending in the vehicle front-rear direction is coupled to the lower end portion of the front pillar 2, and the upper end portion and the lower end portion of the center pillar 5 disposed in the vehicle up-down direction of the front pillar 2 are respectively connected to the roof side rail. 3. It has a structure in which a front door opening 1a and a rear door opening 1b are formed by bridging and connecting to the rocker panel 4.

  The rear end portions of the roof side rail 3 and the rocker panel 4 are coupled to a quarter panel (not shown) that forms the rear edge portion of the rear door opening 1b.

  A floor panel 6 is disposed between the left and right rocker panels 4 and 4, and a front seat and a rear seat (not shown) are mounted on the floor panel 6.

  The center pillar 5 is arranged between a pillar outer 5a and a pillar inner 5b having a generally hat-shaped cross section, and a cross-sectional hat-shaped pillar rein hose 7 formed so as to be substantially along the pillar outer 5a. It has a structure in which the rear flange portions 8a and 8b are joined together by welding, thereby forming a rectangular tube-like closed cross section extending in the vertical direction.

  The rocker panel 4 is arranged between a rocker outer 4a and a rocker inner 4b having a generally hat-shaped longitudinal section, and a rocker-in hose 9 having a hat-shaped longitudinal section formed so as to substantially follow the rocker outer 4a. It has a structure in which the lower flange portions 10a and 10b are joined to each other by welding, whereby a rectangular tube-like closed cross section extending in the front-rear direction is formed.

  The pillar outer 5a and the rocker outer 4a are integrally formed by press molding. The lower flange portion 5d of the pillar inner 5c is joined to the upper flange portion 10a of the rocker panel 4.

  An upper end portion 7a of the pillar rein hose 7 is joined to a roof rein hose (not shown) of the roof side rail 3 by welding. The lower end portion 7 b of the pillar rein hose 7 is joined to the outer surface of the outer wall portion 9 a of the rocker inhose 9 by welding, and this joining portion is a joining portion 11.

  A front end portion 9 b of the rocker inhose 9 is coupled to a lower end portion of the front pillar 2. The rocker-in hose 9 extends rearward in a straight line from the front end portion 9 b coupled to the front pillar 2, and the rear end portion 9 c is located behind the rear edge of the coupling portion 11 with the pillar rein hose 7. It is formed to do.

  The yield strength of the coupling portion 11 of the pillar rein hose 7 with respect to the impact force is configured to be greater than the yield strength of the rear portion of the coupling portion 11 with the rocker panel 4. Specifically, the lower end portion 7b of the pillar rein hose 7 has a pair of front and rear ridges 7d and 7d having a plurality of vertical wall portions 7c projecting outward from the outer wall portion 9a of the rocker rein hose 9 in the vehicle width direction. The bulge is formed. The front, rear edge portions 7e, 7f and the central concave portion 7g formed by the convex portions 7d are joined to the outer wall portion 9a by welding, whereby each convex portion 7d and the outer wall portion of the rocker inhose 9 are connected. A box-shaped closed cross section extending in the vertical direction is formed at 9a.

  A bulkhead 13 is disposed at the rear of the joint 11 between the rocker-in hose 9 and the rocker-inner 4b. The bulkhead 13 has a U-shaped cross section in which joint portions 13b and 13b are formed by bending at outer and inner edges of a flat plate portion 13a extending in the vehicle width direction.

  The inner joint piece 13b of the bulkhead 13 is joined to the rocker inner 4b by welding, and the outer joint piece 13b is superimposed on the outer wall part 9a of the rocker inhose 9 and the rear edge part 7f of the pillar rein hose 7. Are joined together by welding.

  Thus, by making the yield strength of the coupling part 11 greater than the proof stress of the rear part of the coupling part 11 of the rocker panel 4, the rear part of the coupling part 11 of the rocker panel 4 is located inside the vehicle at the time of a side collision. Deform. Here, in order to increase the yield strength of the connecting portion 11, for example, a cross member (not shown) extending in the vehicle width direction is positioned between the left and right connecting portions 11, and the cross member is bridged between the connecting portions. You may pass and combine. It is also possible to form a highly rigid portion for increasing the proof stress between the left and right joints of the floor panel.

  According to the present embodiment, the rocker inhose 9 extends linearly rearward from the front end 9b joined to the lower end of the front pillar 2, and the rear end 9c is joined to the pillar rein hose 7. A pair of front and rear ridges 7d and 7d having a plurality of vertical wall portions 7c are formed on the lower end portion 7b of the pillar rein hose 7 so as to be located on the rear side of the rear edge, thereby forming the connecting portion 11 Since the proof stress of the rocker panel 4 is greater than the proof strength of the rear portion of the joint portion 11 of the rocker panel 4, the impact force F at the time of a side collision is, as shown in FIG. The rear side portion becomes a break point and is deformed to the inside of the vehicle, and the influence on the passenger compartment due to the center pillar 5 being bent and deformed can be suppressed. In this case, since the entire center pillar 7 is deformed so as to enter the inside of the vehicle like a pendulum with the upper end portion 7a as a fulcrum, the center pillar 7 can be prevented from being bent.

  In the present embodiment, the rocker-in hose 9 is formed so as to extend from the front end portion 9b coupled to the front pillar 2 to the rear side portion from the coupling portion 11 with the pillar rein hose 7, so that the impact at the time of a frontal collision The force is reliably transmitted from the front pillar 2 and the rocker-in hose 9 to the rear of the vehicle body via the coupling part 11 with the center pillar 7, and the rocker panel 4 is bent and deformed in the middle of the vehicle, thereby affecting the passenger compartment. Can be avoided.

  Further, since the rocker-in hose 9 is disposed in the rocker panel 4 over almost the entire length thereof, the torsional rigidity of the rocker panel 4 with respect to the input to the vehicle body during traveling can be increased.

  In the present embodiment, since the bulkhead 13 is disposed at the rear portion of the joint portion 11 of the rocker inhose 9, the cross-sectional rigidity of the rear portion of the joint portion 11 in the vehicle width direction can be increased, and the joint portion 11 of the rocker panel 4. It is possible to reliably induce deformation in the rear side portion.

  In the above embodiment, the rear end portion 9c of the rocker inn hose 9 is positioned at the rear side part of the joint 11 with the pillar rein hose 7. However, in the present invention, the rocker inn hose 9 is moved from the front pillar to the quarter panel. The rocker panel may be formed over the entire length of the rocker panel, and in this case as well, substantially the same effect as the above embodiment can be obtained by making the strength of the joint portion larger than that of the rear portion of the joint portion of the rocker panel. .

It is a side view which shows the side part vehicle body of the motor vehicle by one Embodiment of this invention. FIG. 2 is a cross-sectional view (cross-sectional view taken along the line II-II in FIG. 1) of a joint portion between the center pillar and the rocker panel of the side body. FIG. 3 is a cross-sectional view of the connecting portion (a cross-sectional view taken along line III-III in FIG. 1). It is a schematic diagram which shows the deformation | transformation state at the time of the side collision of the said side part vehicle body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side body 4 Rocker panel 5 Center pillar 7 Pillar rein hose 7b Lower end part 9 Rocker inhose 9b Front end part 9c Rear end part 11 Connection part 13 Bulkhead

Claims (2)

In the side body structure of an automobile in which the lower end portion of a pillar rein hose disposed in a center pillar extending in the vehicle vertical direction is coupled to a rocker in hose disposed in a rocker panel extending in the vehicle front-rear direction,
The rocker inhose is formed so as to extend from the front part of the rocker panel to at least the rear side part of the joint part with the pillar rein hose, and the resistance to the impact force of the joint part of the pillar rein hose is A vehicle body structure for a side part of an automobile, wherein the rear part of the joint part of the rocker inhose is deformed to the inside of the vehicle at the time of a side collision.   2. The side body structure of an automobile according to claim 1, wherein a bulkhead for increasing cross-sectional rigidity in the vehicle width direction of the joint portion is disposed at a rear portion of the joint portion of the rocker inhose.

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