JP2012148744A - Front vehicle-body structure for automobile - Google Patents

Abstract

To provide a front body structure of an automobile capable of reliably transmitting an input at the time of a vehicle collision from an apron member to a roof rail via a front pillar without causing an increase in body weight and cost.
A pillar inner panel 15 is formed with a bead 15c having a substantially triangular shape, and the bottom 15d of the bead 15c faces the apron member 3 and the top 15e faces the roof rail 8. The distance s1 between the ridgelines L1 and L2, the distance s2 'between the ridgelines L1 and L1', and the distance s2 between the ridgelines L2 and L2 'from the bottom 15d to the top 15e are from the bottom 15d to the top 15e. It is formed to gradually decrease as it goes.
[Selection] Figure 1

Description

  The present invention relates to a front body structure of an automobile in which a part of input at the time of a vehicle collision is distributed from an apron member to a roof rail via a front pillar and transmitted.

  The automobile employs a structure that avoids the influence on the passenger compartment by enhancing the energy absorption function in the event of a vehicle collision. For example, Patent Document 1 discloses that energy at the time of a vehicle collision is transmitted from an apron member to a roof rail and a rocker panel via a front pillar and distributed to a belt line rein hose of a front door. An absorbent structure is disclosed.

JP 2001-334955 A

  By the way, in the conventional structure, when the front pillar collapses in the event of a vehicle collision, there is a concern that the input from the apron member cannot be distributed and transmitted from the front pillar to the roof rail. In order to prevent the front pillar from collapsing, it may be possible to add a reinforcing member such as a bulkhead to the front pillar or increase the thickness of the front pillar. In addition, there is a problem that costs increase.

  The present invention has been made in view of the above-described conventional situation, and the front of an automobile that can reliably transmit an input at the time of a vehicle collision from an apron member to a roof rail via a front pillar without causing an increase in vehicle body weight and cost. An object is to provide a vehicle body structure.

  The present invention relates to a front pillar formed by joining a pillar outer panel and a pillar inner panel so as to form a substantially hollow shape, and an apron member extending in the vehicle front-rear direction and having a rear end portion coupled to a midway portion in the vertical direction of the front pillar. And a roof rail extending in the vehicle front-rear direction and having a front end portion coupled to the upper end portion of the front pillar, and a part of the input from the front of the vehicle is distributed from the apron member to the roof rail via the front pillar. The pillar inner panel is formed with a bead having a generally triangular shape, and the bottom of the bead is directed toward the apron member. The top portion is arranged so as to face the roof rail side, and the interval between each ridge line from the bottom portion to the top portion is directed from the bottom portion to the top portion. It is characterized by being formed so as to gradually decrease as.

  According to the front vehicle body structure of the present invention, a bead having a triangular shape is formed on the pillar inner panel, the bottom of the bead is directed to the apron member, the top is directed to the roof rail, and the intervals between the ridge lines Is gradually reduced from the bottom to the top, so the input from the apron member at the time of a vehicle collision is received at the bottom of the bead of the pillar inner panel and each ridgeline, and from the bottom to each ridgeline The light is transmitted to the roof rail while converging toward the top. As a result, the load can be effectively transmitted to the roof rail without causing the cross-section of the front pillar, and the influence on the passenger compartment can be avoided. That is, the bottom of the wide surface of the bead is directed to the upstream side in the input direction, and the top of which the distance between the two sides of the triangle and the ridge line of each side is narrowed from the bottom to the downstream, thereby converging the load and the roof rail. Can be transmitted efficiently.

  In the present invention, since the bead is bulged and formed on the pillar inner panel, it is possible to avoid the weight and cost increase as in the case of adding the above-mentioned reinforcing member or increasing the plate thickness, and light weight. Contribute to cost reduction and cost reduction.

1 is a side view of a front body of an automobile according to Embodiment 1 of the present invention. It is sectional drawing (II-II sectional view taken on the line of FIG. 1) of the front pillar of the front vehicle body. It is a side view of the pillar inner panel of the front pillar. It is a schematic side view of the front vehicle body.

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

  1 to 4 are views for explaining a front body structure of an automobile according to a first embodiment of the present invention.

  In the figure, reference numeral 1 denotes a front body of an automobile. The front vehicle body 1 includes left and right front pillars 4 and 4 extending in the vehicle vertical direction, and left and right front ends 4a extending in the vehicle front-rear direction and a rear end portion 3a coupled to the middle portion of the front pillar 4 in the vertical direction. Apron members 3, 3 and left and right roof rails 8, 8 extending in the longitudinal direction of the vehicle and having a front end 8a coupled to an upper end 4a of the front pillar.

  A front end 9 a of a rocker panel 9 extending in the vehicle front-rear direction is joined to the lower end 4 b of the front pillar 4.

  Behind the front pillar 4 is disposed a center pillar 12 which is connected to the roof rail 8 and the rocker panel 9 so as to form a front door opening 1a. A front door 19 supported by the front pillar 4 is disposed in the front door opening 1a so as to be openable and closable (see FIG. 2).

  The front vehicle body 1 includes left and right side members 2 and 2 that extend in the vehicle front-rear direction, coupling members 5 and 5 that couple the left and right side members 2 and the apron member 3, A cowl panel 7 extending so as to connect the right apron members 3 and 3 and a dash panel (not shown) for partitioning the front vehicle body 1 into an engine compartment A and a compartment B are provided.

  A strut tower 6 is disposed on the inner side of the left and right apron members 3, and the strut tower 6 is coupled to the apron member 3 at its upper end and to the side member 2 at its lower end.

  The front pillar 4 includes a pillar outer panel 14 having a generally hat-shaped cross section and a pillar inner panel 15 having a generally hat-shaped cross section, and a pillar inner panel 15 having a generally hat-shaped cross section, and the pillar outer panel 14 and the pillar inner panel. The 15 front flange portions 14a and 15a and the rear flange portions 14b and 15b are joined together by welding to form a rectangular tube-like closed cross section.

  The pillar rein hose 16 is disposed so as to surround the rear half of the front pillar 4, and a front flange portion 16 a of the pillar rein hose 16 is joined to a middle portion in the front-rear direction of the pillar inner panel 15 by welding to form a rear flange portion 16 b. Are stacked on the rear flange portions 14b and 15b and joined by welding.

  Thus, the front pillar 4 is divided into a buckling area D in the front half where the pillar rein hose 16 is not disposed and a load transmission area E in the rear half where the pillar rein hose 16 is disposed. (See FIG. 2).

  The front pillar 4 is constituted by a pillar lower portion 4 ′ extending so as to be substantially vertical in the vertical direction, and a pillar upper portion 4 ″ extending obliquely upward rearward of the vehicle following the upper end of the pillar lower portion 4 ′. The apron member 3 is coupled to the upper end portion of the pillar lower portion 4 '.

  The pillar rein hose 16 is divided into a lower allied hose 17 extending along the pillar lower part 4 ′ and an upper allied hose 18 extending along the pillar upper part 4 ″ and coupled to the lower allied hose 17. Has been.

  The pillar inner panel 15 is formed with a bead 15c having a generally triangular shape. The bead 15c is recessed outside the vehicle so as to enter the load transmission area E of the pillar rein hose 16.

  The bead 15c is disposed so as to be located at a boundary portion between the pillar lower portion 4 ′ and the pillar upper portion 4 ″, and a bottom portion 15d thereof faces toward the apron member 3 and a top portion 15e faces toward the roof rail 8 side. It is arranged as follows.

  The bead 15c has the greatest depth of depression on the vehicle outer side of the bottom portion 15d, and becomes shallower from the bottom portion 15d to the top portion 15e, and the apex is flush with the general surface of the pillar inner panel 15. Yes.

  Since the bead 15c having such a shape is formed, the bead 15c functions as a guide surface when an antenna harness (not shown) is routed in the front pillar 4, and the bead 15c is effectively used as a jump base. By doing so, the wiring work of the said antenna harness can be performed easily.

  In the bead 15c, an interval s1 between the ridge lines L1 and L2 from the base 15d to the apex 15e, an interval s2 'between the ridges L1 and L1', and an interval s2 between the ridges L2 and L2 'go from the base 15d to the top 15e. It is formed so as to gradually decrease (see FIG. 3). More specifically, the distance s1 between the upper two ridgelines L1 and L2 of the bead 15c and the depth interval s2 between the upper two ridgelines L1 and L2 and the lower two ridgelines L1 ′ and L2 ′ extending along the ridgelines L1 and L2 ′. ′ And S2 are formed so as to become gradually narrower and shallower from the bottom 15d toward the top 15e.

  Further, the ridgelines L3 and L3 ′ on the upper and lower sides of the bottom portion 15d of the bead 15c are formed so as to be substantially orthogonal to the input direction from the apron member 3. As a result, a part of the load received at the front corner portion 15d 'of the bottom portion 15d is transmitted to the pillar upper portion 4 "via the ridgelines L1 and L1', and the remainder is transferred to the pillar lower via the ridgelines L3 and L3 '. It is distributed and transmitted to the part 4 'side.

  The input F at the time of a vehicle collision is transmitted rearward through the axis of the side member 2 as shown by an arrow in FIG. 1, and is transmitted from the side member 2 to the apron member 3 through the coupling member 5, It is transmitted from the apron member 3 to the front pillar 4. The load transmitted to the front pillar 4 is transmitted to the pillar rein hose 16 in the load transmission area E while being absorbed in the buckling area D, and from the pillar rein hose 16 to the pillar lower portion 4 ′ and the pillar upper portion 4 ″. And is transmitted to the rocker panel 9 and the roof rail 8. In this case, the load from the pillar rein hose 16 is transmitted to the bead 15c of the pillar inner panel 15, converged from the bottom side 15d of the bead 15c toward the top 15e, and transmitted to the roof rail 8 side. The part is transmitted from the bottom part 15d to the pillar lower part 4 'side.

  As described above, according to the present embodiment, the bead 15c having a triangular shape is bulged and formed on the pillar inner panel 15, the bottom portion 15d of the bead 15c is directed to the apron member 3, and the top portion 15e is directed to the roof rail 8 side. And the distances s1, s2 ', s2 between the ridgelines L1, L1', L2, L2 'are gradually decreased from the bottom side 15d toward the top 15e. The input is received by the bottom 15d of the bead 15c of the pillar inner panel 15 and the ridge lines L1 and L2, and is transmitted to the roof rail 8 while converging from the bottom 15d through the ridge lines L1 and L2 toward the top 15e. Will be. Thus, the load can be effectively transmitted to the roof rail 8 without causing the cross section of the front pillar 4 to be avoided, and the influence on the passenger compartment can be avoided. That is, the base 15d of the wide surface of the bead 15c is directed upstream in the input direction, and the interval s2 between the two sides L1, L2 of the triangle and the ridgelines L1, L1 'and L2, L2' of each side from the base 15d is narrow. By directing the top portion 15e toward the downstream side, the load can be converged and transmitted to the roof rail 8 efficiently.

  In this embodiment, the structure is such that the beads 15c are bulged and formed on the pillar inner panel 15, so that the weight and cost increase as in the case of adding the above-mentioned reinforcing member or increasing the plate thickness is increased. This can be avoided, contributing to weight reduction and cost reduction.

  In this embodiment, the bead 15c is formed so as to enter the load transmission area E in the pillar reinhose 16, so that the cross-sectional rigidity of the load transmission area E can be increased, and the cross-section of the front pillar 4 can be prevented from collapsing. The load can be transmitted effectively.

1 Front Body 3 Apron Member 4 Front Pillar 8 Roof Rail 14 Pillar Outer Panel 15 Pillar Inner Panel 15c Bead 15d Bottom Side 15e Top 16 Pillar Rein Hose L1, L1 ′, L2, L2 ′ Edge Lines s1, s2 ′, s2 Distance

Claims (1)

A front pillar formed by connecting a pillar outer panel and a pillar inner panel so as to form a substantially hollow shape;
An apron member extending in the longitudinal direction of the vehicle and having a rear end portion coupled to a midway portion in the vertical direction of the front pillar;
A roof rail extending in the longitudinal direction of the vehicle and having a front end coupled to an upper end of the front pillar;
A vehicle front body structure in which a part of the input from the front of the vehicle is distributed and transmitted from the apron member to the roof rail via the front pillar,
The pillar inner panel is formed with a bead having a substantially triangular shape,
The bead is arranged so that the bottom side of the bead faces the apron member side and the top part faces the roof rail side, and the interval of each ridge line from the bottom side to the top part gradually decreases as it goes from the bottom part to the top part. A front body structure of an automobile characterized by being formed to

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