JP2013091388A - Side body structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side body structure of an automobile, capable of making a locker member receive a load on side impact collision, and capable of preventing the side body of the automobile from deforming by transmitting the load to a cross member.SOLUTION: The side body structure of the automobile includes a portion 5c extending in a pillar, which extends upward so that part of the locker member 5 is located in the pillar member 10 for connection of right and left pillar members 10, 10 to the right and left locker members 5, 5 extending in the longitudinal direction of the automobile, and for connection of the upper parts of the right and left pillar members 10, 10 to each other by the cross member 23. The portion 5c extending in the pillar and the cross member 23 are bridged and connected to each other by a brace member 17.

Description

  The present invention relates to a side body structure of an automobile in which an input at a side collision is received by a rocker member and transmitted to a cross member.

  For example, in an open car, since the upper end of the center pillar is a free end that is not connected to the roof, there is a concern about the influence on the passenger compartment due to an input at the time of a side collision, and a structure that avoids this is required. For example, in Patent Document 1, a bulkhead is arranged in a center pillar, and a bulkhead of the center pillar and a cross member of a floor are connected by a brace to receive an input at a side collision by a rocker panel. A structure is disclosed in which transmission is performed to the cross member via the bulkhead and brace of the center pillar.

JP 2008-12997 A

  By the way, when the conventional structure for dealing with a side collision is adopted in a vehicle with a low vehicle height such as an open car, the rocker panel is positioned at a low place, so that the rocker panel receives an input at the time of a side collision. It may not be possible. For this reason, the input at the time of a side collision is transmitted only from the bulkhead in the center pillar to the cross member via the brace, and depending on the input, there is a concern that the center pillar falls to the inside of the vehicle and the amount of the pillar approach increases. .

  The present invention has been made in view of the above-described conventional situation. An automobile capable of receiving an input at the time of a side collision by a rocker member and further suppressing deformation of a vehicle body side portion by transmitting the input to a cross member. It is an object to provide a side body structure.

  The present invention includes a left and right rocker member extending in the vehicle front-rear direction at the lower end of the left and right sides of the vehicle, and a left and right rocker member coupled to the left and right rocker members, extending upward and having an upper end opened. A side body structure of an automobile comprising a right pillar member and a cross member extending in a vehicle width direction and connecting upper portions of the left and right pillar members, wherein a part of the rocker member is connected to the pillar. It is characterized by comprising a pillar extension part extending upward so as to be positioned in the member, and a brace member that bridges and connects the pillar extension part and the cross member.

  According to the side body structure according to the present invention, a part of the rocker member is extended into the pillar member, so that the rigidity of the pillar member can be improved and the side collision also occurs in a vehicle having a design with a low rocker member position. The input load at the time can be received by the rocker member.

  In addition, since the pillar inner extension portion of the rocker member and the cross member are bridged and connected by the brace member, the load received by the rocker member can be transmitted to the cross member, and the upper end of the pillar member is free end without a roof. Even in an open car, the deformation of the side of the vehicle body can be effectively suppressed, which can contribute to passenger protection.

  In addition, because the structure in which the pillar inner extension portion of the rocker member and the cross member are coupled by the brace member, there is no need to increase the thickness of various plate materials or to add a large reinforcing member. The problem of weight increase, cost increase and productivity reduction can be avoided.

1 is a perspective view of a side 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 said side part vehicle body. It is the perspective view seen from the vehicle outer side of the rocker member and brace member of the said side part vehicle body. It is a schematic diagram which shows the load transmission state at the time of the side collision of the said side part 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 side body structure of an automobile according to Embodiment 1 of the present invention. In the description of this embodiment, the terms front and rear and left and right mean front and rear and left and right when viewed in the vehicle forward direction while seated on the seat.

  In the figure, reference numeral 1 denotes a side body of an open car. The side vehicle body 1 includes left and right side panels 4, which are formed by connecting a side outer panel 2 and a side inner panel 3 which are exterior parts disposed on the left and right outer sides in the vehicle width direction so as to form a hollow shape. 4, a back panel 12 disposed between rear end portions of the left and right side panels 4, and a front floor panel 9 and a rear floor panel disposed between lower end portions of the left and right side panels 4. 6.

  The left and right side panels 4, the back panel 12, the front floor panel 9 and the rear floor panel 6 form a passenger compartment that opens upward.

  The side body 1 is disposed at the front of the left and right side panels 4 and extends upward, with its upper ends opened, and pillar pillars 10 and 10, and a lower end of the side of the body. The left and right rocker panels (rocker members) 5 and 5 to which the center pillar 10 is coupled are connected to the left and right rocker panels 5 and 5 in the vehicle width direction. And a cross member 8 having a substantially cross-sectional hat shape.

  The left and right rocker panels 5 and 5 are arranged between the upper and lower flange portions 5a 'and 5a' of the rocker outer 5a and the upper and lower flange portions 5b 'and 5b' of the rocker inner 5b. The lower part 3a is sandwiched between the two and spot-welded in a three-ply manner.

  Left and right rear side members 7 and 7 having a substantially cross-sectional hat shape extending in the front-rear direction are disposed on the left and right edges of the lower surface of the rear floor panel 6. The left and right rear side members 7 are coupled to the rear floor panel 6 and the rocker inner 5b, and the cross member 8 is coupled between the front end portions of the left and right rear side members 7.

  Lower ends of front pillars 19, 19 extending upward are coupled to the front end 5 h of the left and right rocker panels 5. A door opening 1 b is formed by the front pillar 19, the rocker panel 5, and the center pillar 10. The door opening 1b is opened and closed by a door (not shown) rotatably supported by the front pillar 19.

  The left and right center pillars 10 are each provided with a pillar rein hose 30 between a front portion 3b of the side inner panel 3 and a pillar outer panel 29 disposed on the vehicle inner side of the side outer panel 2. It has a structure in which a rectangular tube-shaped closed cross-section portion x extending in the vertical direction is formed by integrally joining front and rear edges and upper edges.

  Between the upper portions of the left and right center pillars 10, a roll bar device 20 for increasing the rigidity of the vehicle body against a load at the time of a fall or a side collision is disposed.

  The roll bar device 20 includes an upper cross bar 22 to which a pair of left and right roll bars 21 and 21 are coupled, and a lower cross bar (cross member) 23 that is offset from the front lower side of the upper cross bar 22. , Connecting bars 24 and 24 for connecting the left and right ends of the crossbars 22 and 23 in the vertical direction, and a left and right bracket in which the upper and lower crossbars 22 and 23 are connected together with the connecting bar 24. 25, 25.

  The left and right brackets 25 are tightened by inserting bolts 27 into the respective cylindrical collar members 26 arranged in the vehicle width direction within the closed cross section of the center pillar 10 and tightening. Is bound to.

  In the left and right side panels 4, quarter members 11, 11 extending in the front-rear direction along the upper side of the side inner panel 3 are disposed.

  The left and right quarter members 11 have a substantially cross-sectional hat shape that opens to the inside of the vehicle, and the upper flange portion 11a thereof is connected to the upper flange portion 3c of the side inner panel 3 and the upper flange portion 29a of the side outer panel 29. And the lower flange portion 11b is coupled to the outer wall surface of the side inner panel 3, thereby forming a closed section a having a rectangular tube shape extending in the vehicle front-rear direction with the side inner panel 3. .

  The rocker panel 5 is formed with an in-pillar extending portion 5 c that extends upward so that a part of the rocker panel 5 is positioned in the center pillar 10. The pillar inner extension portion 5c includes a vertical wall portion 5d extending upward from the rocker outer 5a and a horizontal wall portion 5e bent inward in the vehicle width direction from the upper end of the vertical wall portion 5d. The formed flange portion 5f is fixed to a halfway portion in the vertical direction of the side inner panel 3 together with a brace plate 17 described later. As a result, a closed cross section b that is long in the vertical direction is formed in the center pillar 10 approximately at the center in the height direction of the center pillar 10.

  Further, the flange portion 5f of the pillar extension portion 5c and the lower cross bar 23 are joined by a brace plate (brace member) 17 disposed so as to bridge the two obliquely. The plate 17, the lower cross bar 23, and the side inner panel 3 form a triangular reinforcing portion c.

  The brace plate 17 is formed by forming upper and lower flange portions 17b and 17c at both ends of a flat plate-like brace portion 17a. The upper flange portion 17b is fixed to the lower portion of the lower cross bar 23 by welding, The portion 17c is coupled to the flange portion 5f of the pillar extension portion 5c with the side inner panel 3 interposed by a bolt 5g.

  According to the side body structure according to the present embodiment, since the pillar extension portion 5c that extends a part of the rocker outer 5a into the center pillar 10 is formed, the building rigidity of the center pillar 10, that is, the center pillar 10 is The rigidity against the load in the direction of tilting can be improved.

  Further, since the pillar extension 5c extending upward is formed, even in a vehicle having a design in which the position of the rocker panel 5 is low, as shown in FIG. 4, the input height position of the load F by the barrier 31 in the side collision experiment, as shown in FIG. The pillar extension portion 5 c is positioned at the position, and the load F can be received by the rocker panel 5.

  Furthermore, since the in-pillar extending portion 5c of the rocker panel 5 and the lower cross bar 23 are bridged and joined by the brace plate 17, the load F received by the rocker panel 5 is lowered via the brace plate 17. Even in an open car that can be transmitted to the side crossbar 23 and does not have a roof and the upper end of the center pillar 10 is a free end, deformation of the side of the vehicle body can be effectively suppressed, contributing to occupant protection.

  In addition, since the above-described effects can be obtained with a structure in which the pillar inner extension portion 5c of the rocker panel 5 and the lower cross bar 23 are coupled by the brace plate 17, the thickness of various plate materials can be increased, There is no need to add a reinforcing member in the shape, and problems such as an increase in vehicle weight, an increase in cost, and a decrease in productivity can be avoided.

  Here, in the first embodiment, the pillar inner extension portion 5c of the rocker panel 5 and the lower cross bar 23 are coupled by the upper brace plate 17, but as shown by a two-dot chain line in FIG. The inwardly extending portion 5c and the rear floor panel 6 and thus the cross member 8 may be coupled by a lower brace plate 17 '. In this case, the lower brace plate 17 ′ and the upper brace plate 17 may be formed integrally or separately.

  As described above, when the lower brace plate 17 ′ is provided, the building rigidity of the center pillar 10 can be further increased, and the load F at the time of the side collision is applied to the lower cross bar 23 and the rear floor 6. , It can be transmitted more reliably.

  When the lower brace plate 17 'is added, the height dimension H from the connecting portion of the brace plates 17 and 17' with the pillar extension portion 5c to the lower cross bar 23 or the rear floor panel 6; It is desirable to set H ′ to the same dimension as much as possible. In this case, the load F at the time of the side collision can be evenly distributed and transmitted to the lower cross bar 23 and the rear floor 6.

1 Side body 5 Rocker panel (Rocker member)
5c Pillar extension 10 Center pillar (pillar member)
17 Brace plate (brace member)
23 Lower cross bar (cross member)

Claims (1)

Left and right rocker members extending in the longitudinal direction of the vehicle at the lower end of the left and right sides of the vehicle;
Left and right pillar members coupled to the left and right rocker members, extending upward and having upper ends opened;
A side body structure of an automobile including a cross member extending in a vehicle width direction and connecting upper portions of the left and right pillar members,
An in-pillar extending portion extending upward so that a part of the rocker member is located in the pillar member;
A side body structure for an automobile, comprising: a brace member that bridges and couples the pillar extension portion and the cross member.

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