JP2008239108A - Side vehicle body structure for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide side vehicle body structure for an automobile capable of securely transmitting an impact load at the time of vehicle side collision from an impact beam to a vehicle body component. <P>SOLUTION: A load transmission member 22 formed by bending a steel plate material is arranged between the impact beam 20 and a seat frame (vehicle body component) 18. The load transmission member 22 comprises a deformation part 22a engaged with the impact beam 20 and deformed to the vehicle inner side so as to hold the impact beam 20 at the time of vehicle side collision and a load transmission part 22b continued to the deformation part 22a and transmitting the collision load from the impact beam 20 to the seat frame 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a side body structure of an automobile in which an impact load at the time of a vehicle side collision is transmitted to a vehicle body constituent member via an impact beam disposed in a door.

In an automobile, for example, in Patent Document 1, a load is transmitted between an impact beam disposed in a door and a floor member in order to prevent the door from being deformed and entering the vehicle interior at the time of a vehicle side collision. A bracket is arranged so that the impact load at the time of a side collision is transmitted from the impact beam to the floor member via the bracket.
Japanese Patent Laid-Open No. 10-95231

  By the way, in the conventional side body structure described above, when the impact load is transmitted from the impact beam to the bracket, the impact beam and the bracket may be displaced in the vertical direction depending on the deformation of the door. There is a concern that it cannot be communicated reliably.

  The present invention has been made in view of the above-described conventional situation, and an object thereof is to provide a side body structure of an automobile that can reliably transmit an impact load at the time of a vehicle side collision from an impact beam to a vehicle body constituent member.

  According to a first aspect of the present invention, a door is disposed in a door opening formed in a side portion of the vehicle body, an impact beam extending in the vehicle front-rear direction is disposed in the door, and the vehicle side surface A side body structure of an automobile in which a vehicle body structural member that receives an impact load from the impact beam at the time of a collision is disposed, and is formed by bending a steel plate material between the impact beam and the vehicle body structural member. The load transmitting member is arranged so that the load transmitting member is engaged with the impact beam and deforms to the inside of the vehicle so as to hold the impact beam at the time of a vehicle side collision, and the deformed portion follows the deformed portion. It is characterized by comprising a load transmitting portion for transmitting a collision load from an impact beam to the above-mentioned vehicle body constituting member.

  Here, the vehicle body constituting member includes a rocker member, a pillar member, a floor member, a side member, a cross member, a seat frame of a seat, and the like.

  According to a second aspect of the present invention, in the first aspect, the impact beam is a rod-shaped member having a substantially circular cross-sectional shape, and the deformed portion is recessed toward the vehicle interior so as to substantially follow the outer peripheral surface of the impact beam. The load transmitting portion has a plurality of vertical walls extending substantially orthogonal to the longitudinal direction of the impact beam, and the deformation portion is between the vertical wall and the deformation portion. It is characterized in that a gap is provided to allow deformation.

  According to the side body structure of the present invention, in the event of a vehicle side collision, a deformation portion that deforms to the inside of the vehicle so as to engage the impact beam and hold the impact beam, and the impact beam following the deformation portion, Since the load transmitting member having the load transmitting portion that transmits the collision load to the vehicle body structural member is arranged, the deformed portion is deformed so as to hold the impact beam, so that the impact beam is displaced or detached from the load transmitting member. Can be prevented. Thereby, the impact load can be reliably transmitted from the impact beam to the vehicle body constituent member via the load transmission unit, and the impact beam can be prevented from entering the vehicle compartment.

  In this invention, since the said load transmission member was formed by bending a steel plate material, manufacturing cost can be reduced compared with the case where a load transmission member is formed by drawing, for example.

  In the invention of claim 2, the concave portion is formed along the outer peripheral surface of the impact beam in the deformed portion, and a plurality of vertical walls substantially perpendicular to the longitudinal direction of the impact beam are formed in the load transmitting portion. Since a gap allowing the deformation of the deformation portion is provided between the vertical wall and the deformation portion, the receiving surface functions as a guide for holding the impact beam, and the deformation portion is easily deformed by the gap. Thus, the deformed portion and the impact beam can be more reliably engaged. Further, the vertical wall can efficiently transmit the load from the impact beam to the vehicle body constituting member.

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

  1 to 5 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 automobile, and FIG. 2 is a side view of an impact beam disposed on a rear door. 3 is a rear sectional view of the rear door (sectional view taken along line III-III in FIG. 2), FIG. 4 is a perspective view of the load transmitting member, and FIG. 5A is a sectional view of the load transmitting member (of FIG. 5B). FIG. 5B is a side view of the load transmitting member.

  In the figure, reference numeral 1 denotes a vehicle body. The vehicle body 1 includes left and right side panels (vehicle body side portions) 2 and 2 and a roof panel 3 connected between upper ends of the left and right side panels. And a floor panel 4 connected between the lower ends of the vehicle compartment 5 is formed.

  A front seat (not shown) is mounted on the front portion of the floor panel 4 in the passenger compartment 5, and a rear seat 6 is mounted on the rear portion. The rear seat 6 has a seat cushion 6 a and a seat back 6 b, and the seat cushion 6 a is supported by a seat frame (vehicle body constituent member) 18.

  The seat frame 18 includes a seat rail member 18a that is fixed on the floor panel 4 and supports the seat cushion 6a so as to be slidable back and forth, and a frame member 18b connected to the seat rail member 18a. .

  The left and right side panels 2 include a front pillar 7, a center pillar 8, and a quarter pillar 9 that extend substantially in the vertical direction, and left and right roof rails 10 and 10 that extend in the front-rear direction between the upper and lower ends of the quarter pillar 9. 11, 11 and 11 are connected to each other.

  The left and right roof rails 10 are connected to the left and right edge portions (not shown) of the roof panel 3, and the left and right rocker panels 11 are connected to the left and right edge portions 4a of the floor panel 4 ( (See FIG. 3).

  Thus, the front door opening 2a and the rear door opening 2b are formed in the side panel 2, and the front door 12 is disposed in the front door opening 2a, and the rear door 13 is disposed in the rear door opening 2b.

  The rear door 13 is rotatably supported by the center pillar 8 via a pair of upper and lower door hinges 14 and 14.

  The rear door 13 includes a door body 15 formed by joining outer peripheral edges of the outer panel 15a and the inner panel 15b, and a window frame 16 formed on the door body 15. A window glass 16a for opening and closing the opening of the window frame 16 is arranged to be movable up and down (see FIGS. 1 and 3). Reference numeral 19 denotes a resin door trim attached to the vehicle compartment 5 side of the inner panel 15b.

  An impact beam 20 is disposed in the door body 15 of the rear door 13 so as to extend obliquely forward and obliquely upward in the vehicle longitudinal direction. The impact beam 20 is composed of a rod-shaped pipe member having a circular cross section in a direction perpendicular to the axis, and is disposed so as to overlap the seat frame 18 of the seat cushion 6a in the vehicle width direction when viewed from the side of the vehicle.

  The impact beam 20 is disposed so that the front end 20a overlaps the center pillar 8 and is close to the lower door hinge 14 and the rear end 20b overlaps the rear end of the rocker panel 11 when viewed from the side of the vehicle. Has been.

  At the time of a vehicle side collision, the impact beam 20 is stretched between the center pillar 8 and the rocker panel 11 to suppress deformation of the rear door 13 toward the vehicle compartment 5 side.

  A load transmission member 22 is disposed between the impact beam 20 and the seat frame 18. The load transmitting member 22 is disposed in the door body 15 of the rear door 13 and is fixed to the inner panel 15b so as to face the impact beam 20 with a slight gap. In other words, the load transmission member 22 is positioned at substantially the same height as the impact beam 20 and is disposed to face the frame member 18b in the vehicle width direction.

  The load transmission member 22 is integrally formed by bending a flat steel plate material punched and formed by a press.

  The load transmitting member 22 is deformed to the inside of the vehicle so as to engage with the impact beam 20 and hold the impact beam 20 at the time of a vehicle side collision, and the impact beam 20 following the deformed portion 22a. And a load transmitting portion 22b that transmits the collision load from the seat frame 18 to the seat frame 18, and specifically has the following structure.

  The load transmitting portion 22b has a substantially rectangular tube shape that is formed so that the cross-sectional area decreases toward the vehicle outer side.

  Specifically, the load transmitting member 22 is formed by bending an upper wall 22c formed on the inner side of the vehicle following the upper edge of the deformed portion 22a, and bent downward on the front and rear edges of the upper wall 22c. Front and rear upper vertical walls 22d, 22e, and an upper flange portion 22f bent upward on the inner edge of the upper wall 22c, and further on the lower edge of the deformable portion 22a. The lower wall 22g formed to be bent to the vehicle inner side, the front and rear lower vertical walls 22h, 22i formed to be bent upward after the front and rear edges of the lower wall 22g, and the inner edge of the lower wall 22g And a lower flange portion 22j formed by bending downward.

  The front and rear upper vertical walls 22d and 22e and the front and rear lower vertical walls 22h and 22i are overlapped and joined by spot welding. The front and rear upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i are orthogonal to the axis (longitudinal direction) of the impact beam 20, and the upper vertical walls 22d and 22e and the lower vertical walls 22h, The overlapped portion 22i is arranged at a height substantially coincident with the impact beam 20.

  Two beads 22c 'and 22g' extending in the vehicle width direction (input direction) are formed on the upper wall 22c and the lower wall 22g, thereby increasing the proof strength against the impact load at the side collision.

  The upper and lower flange portions 22f and 22j are joined to the inner panel 15b by welding.

  The deformable portion 22a has a semicircular receiving surface 22k that is recessed along the vehicle inner side so as to be substantially along the outer peripheral surface of the impact beam 20, and a hole 22m is formed at the center of the receiving surface 22k. Is formed.

  Between the deformable portion 22a and the upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i, there are provided gaps t and t that allow the deformable portion 22a to be deformed inward. The gaps t are set in advance for bending the front and rear upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i, and the deformed portion 22a is formed by the gap t. Deformation (see FIG. 5A).

  According to the present embodiment, the load transmission member 22 is disposed between the impact beam 20 and the seat frame 18 as the vehicle body constituting member, and the load transmission member 22 is engaged with the impact beam 20 at the time of a vehicle side collision. A deforming portion 22a that deforms toward the inside of the vehicle so as to hold the impact beam 20, and a rectangular tube-shaped load transmitting portion 22b that transmits the collision load from the impact beam 20 to the seat frame 18 following the deforming portion 22a. Since the deforming portion 22a is deformed so as to hold the impact beam 20, it is possible to prevent the impact beam 20 from being displaced from or disengaged from the load transmitting member 22. As a result, the impact load can be reliably transmitted from the impact beam 20 to the seat frame 18 via the load transmitting portion 22b, and the impact beam 20, and consequently the rear door 13 can be prevented from entering the vehicle compartment 5.

  In this embodiment, since the load transmission member 22 is formed by bending a steel plate material, the manufacturing cost can be reduced as compared with the case where the load transmission member 22 is formed by, for example, drawing.

  In the present embodiment, a semicircular receiving surface 22k formed so as to substantially follow the outer peripheral surface of the impact beam 20 is formed on the deforming portion 22a, and the load transmitting portion 20b is orthogonal to the longitudinal direction of the impact beam 20. The front and rear upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i are formed, and the upper and lower vertical walls 22d and 22e and the lower vertical walls 22h and 22i and the deforming portion 22a are interposed between the deforming portions 22a. Therefore, the receiving surface 22k functions as a guide for holding the impact beam 20, so that the deformation portion 22a and the impact beam 20 can be more reliably engaged.

  Further, the deforming portion 22a is easily deformed by the gap t, and the engagement with the impact beam 20 is further ensured. The gap t is preset in order to bend the front and rear upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i, and need not be provided separately.

  Furthermore, the collision load from the impact beam 20 can be reliably transmitted to the seat frame 18 by the front and rear upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i.

  Since the overlapping portions of the front and rear upper vertical walls 22d and 22e and the lower vertical walls 22h and 22i are arranged at a height substantially matching the impact beam 20, the impact load is applied to the overlapping portions of the two plates. Thus, buckling deformation of the load transmitting portion 20b can be prevented, and an impact load can be efficiently transmitted to the seat frame 18.

  In the above embodiment, the load transmission member 22 is disposed on the rear door 13. However, the load transmission member of the present invention may be disposed on the front door 12.

  Moreover, although the said load transmission member 22 was integrally formed by the bending process, you may comprise by two or more steel plate materials in this invention.

  Furthermore, in the above embodiment, the seat frame 18 is described as an example of the vehicle body constituting member, but the present invention may be a vehicle body constituting member such as a rocker member, a pillar member, a floor member, a side member, and a cross member.

  In the above embodiment, the receiving surface 22k of the deforming portion 22a is semicircular, but in the present invention, as shown in FIG. 6, the receiving surface 22k 'of the deforming portion 22a is stepped down to the inside of the vehicle. The receiving surface 22k 'also functions as a guide for holding the impact beam 20.

It is a side view for demonstrating the side part vehicle body structure of the motor vehicle by one Embodiment of this invention. It is a side view of the impact beam of the rear door arrange | positioned at the said motor vehicle. FIG. 3 is a sectional rear view of the rear door (sectional view taken along line III-III in FIG. 2). It is a perspective view of the load transmission member arrange | positioned at the said rear door. It is a figure of the said load transmission member. It is sectional drawing which shows the modification of the load transmission member of the said embodiment.

Explanation of symbols

2 Side panel (vehicle body side)
2b Door opening 13 Rear door 18 Seat frame (vehicle body component)
20 Impact beam 22 Load transmitting member 22a Deformed portion 22b Load transmitting portions 22d and 22e Upper vertical walls 22h and 22i Lower vertical walls 22k and 22k ′ Receiving surface t Clearance

Claims (2)

A door is disposed at a door opening formed on the side of the vehicle body, an impact beam extending in the vehicle front-rear direction is disposed in the door, and the impact beam from the impact beam at the time of a vehicle side collision is located inside the door in the vehicle width direction. It is a side body structure of an automobile in which a vehicle body constituent member that receives an impact load is disposed,
A load transmission member formed by bending a steel plate material is disposed between the impact beam and the vehicle body component,
The load transmitting member is configured to deform a deformation portion that is deformed to the inside of the vehicle so as to be engaged with the impact beam and hold the impact beam at the time of a vehicle side collision, and a collision load from the impact beam following the deformation portion. A side body structure of an automobile, comprising: a load transmission portion that transmits to a vehicle body constituent member. 2. The impact beam according to claim 1, wherein the impact beam is a rod-like member having a substantially circular cross-sectional shape, and the deformed portion has a receiving surface that is recessed toward the vehicle interior so as to substantially follow the outer peripheral surface of the impact beam. The load transmitting portion has a plurality of vertical walls extending substantially orthogonal to the longitudinal direction of the impact beam, and there is a gap between the vertical wall and the deformable portion allowing deformation of the deformable portion. A side body structure of an automobile characterized by being provided.

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