JP2008238885A - Rear body structure of automobile - Google Patents

Abstract

The present invention provides a rear body structure of a vehicle capable of suppressing a rear pillar from entering a room at a side collision.
A first reinforcing member 25 is provided in a rear pillar 14 so as to extend substantially so as to connect a seat belt retractor mounting hole 20b and belt anchor mounting seats 20c, 20d and to form a closed section c with the inner panel 20. The first reinforcing member 25 is bridged between the front edge (rear door opening) 14a and the rein hose 22 and coupled.
[Selection] Figure 1

Description

  The present invention relates to a rear vehicle body structure including a rear pillar that forms a rear door opening, a roof panel connected to an upper end portion of the rear pillar, and a rear wheel house connected to a lower end portion.

  In an automobile, a seat belt device that restrains a rear occupant to a rear seat may be attached to the rear pillar. For example, in Patent Document 1, the first reinforcing member disposed in the rear pillar so as to extend in the up-down direction, the first reinforcing member, the door opening of the rear pillar, and the roof side rail are bridged and coupled. A structure has been proposed in which a second reinforcing member is disposed and a belt anchor is attached to the second reinforcing member.

In the seat belt device, the webbing may be freely inserted and removed in a normal use state, and the seat belt retractor that locks in the event of a vehicle collision may be housed and supported in a mounting hole formed in the inner panel of the rear pillar.
JP 2001-63622 A

  By the way, in the conventional rear body structure described above, depending on the input at the time of a side collision, the rear pillar may be deformed to the indoor side from the mounting hole of the seat belt retractor, and accordingly the rear door There is a concern that the amount of entry into the indoor side will increase.

  The present invention has been made in view of the above-described conventional situation, and it is an object of the present invention to provide a rear vehicle body structure that can suppress the rear pillar from entering the indoor side in a side collision.

  The invention of claim 1 includes a rear pillar that forms a rear door opening with an inner panel and an outer panel, a roof panel connected to an upper end portion of the rear pillar, and a rear wheel house connected to a lower end portion. A rear hose extending in the vehicle vertical direction so as to connect the rear wheel house and the roof panel and forming a closed cross section with the inner panel, and a predetermined interval in the vertical direction is provided on the front side of the inner hose of the inner panel. In the rear body structure of a vehicle in which a seat belt retractor mounting portion and a belt anchor mounting portion are formed, the seat belt retractor mounting portion and the belt anchor mounting portion extend in the rear pillar so as to be substantially connected, and the inner A first reinforcing member that forms a closed section with the panel, and the first reinforcing member is It is characterized in that attached bridged to a rear door opening and the reinforce member.

  According to a second aspect of the present invention, in the first aspect, the second reinforcing member is integrally provided on the first reinforcing member, the second reinforcing member is brought into contact with the belt anchor mounting portion, and the rear door opening portion is provided. And the above-described rein hose.

  According to the rear vehicle body structure of the first aspect of the present invention, the first reinforcing member is provided in the rear pillar so as to substantially connect the seat belt retractor mounting portion and the belt anchor mounting portion and to form a closed cross section with the rear pillar. Since the first reinforcing member is bridged and joined to the rear door opening and the rein hose, the rigidity of the retractor mounting portion of the rear pillar with respect to the input at the time of a side collision can be increased. Thereby, the deformation | transformation to the indoor side from the retractor attachment part of a rear pillar can be suppressed, and the approach amount to the compartment side of a rear door can be suppressed.

  Further, the first reinforcing member can increase the rigidity of the retractor attaching portion and the belt anchor attaching portion, and even if a load is applied to both the attaching portions when the vehicle collides, the load is applied to the first reinforcing member. It is possible to prevent the rear pillar from being deformed toward the passenger compartment.

  In the second aspect of the invention, the second reinforcing member provided integrally with the first reinforcing member is brought into contact with the belt anchor mounting portion, and is coupled over the rear door opening and the rein hose. This is borne by the first and second reinforcing members, so that the rear pillar can be more reliably prevented from entering the room.

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

  1 to 6 are views for explaining a rear body structure of an automobile according to an embodiment of the present invention. FIG. 1 is a side view of the rear body, and FIG. 2 is a sectional view taken along line II-II in FIG. 3 is a sectional view taken along line III-III in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a sectional view taken along line VV in FIG.

  In the figure, reference numeral 1 denotes an automobile, which forms a front door opening 2a and a rear door opening 2b on the left and right sides of the vehicle body 2 constituting the passenger compartment a, and forms a back door opening 2c on the rear end face. Each door opening 2a-2c has a structure in which a front door 3, a rear door 4, and a back door 5 for opening and closing the door openings 2a-2c are arranged, and a front seat 6 and a rear seat 7 are arranged in the vehicle compartment a. Have.

  The vehicle body 2 includes roof side rails 9, 9 extending in the front-rear direction connected to the left and right sides of the roof panel 8, and rocker panels 11, 11 extending in the front-rear direction connected to the left and right sides of the floor panel 10. Are connected by left and right front pillars 12, center pillars 13, and rear pillars 14 extending in the vertical direction. The front door 12 supports the front door 3 and the center pillar 13 supports the rear door 4 via a door hinge (not shown).

  The rear vehicle body 2 ′ of the vehicle body 2 is coupled to the left and right rear pillars 14, the left and right roof side rails 9 coupled to the upper end portion of the rear pillar 14, and the lower end portion of the rear pillar 14. And a wheel house 16 covering the upper part of the left and right rear wheels 15. The rear end portion of the rocker panel 11 is coupled to the coupling portion of the wheel house 16 at the lower end portion of the rear pillar 14.

  The rear pillar 14 has a structure in which the rear inner panel 20 and the rear outer panel 21 are overlapped so as to form a hollow shape, and the front edge portions 14a and the rear edge portions 14b of the inner panel 20 and the outer panel 21 are joined by spot welding. have. The front edge portion 14a forms a rear edge opening portion of the rear door opening 2b, and the rear edge portion 14b forms left and right edge opening portions of the back door opening 2c. Here, when viewed from the side of the vehicle, the seat back 7a of the rear seat 7 is disposed so as to overlap the left and right rear pillars 14 in the vehicle width direction (see FIG. 6).

  The wheel house 16 has an outer edge portion 16d coupled to the lower edge portion 21a of the rear outer panel 21, a wheel outer 16a extending inward in the vehicle width direction from the outer edge portion 16d, and an inner edge portion 16c of the wheel outer 16a. The outer edge portion 16e is overlapped and coupled to the lower edge portion 20a of the inner panel 20, and has a wheel inner 16b extending from the outer edge portion 16e inward in the vehicle width direction. The floor panel 10 is coupled to the lower edge portion 16f of the wheel inner 16b.

  The wheel inner 16b is formed with a suspension support hole 16g for supporting an upper end portion of a rear suspension (not shown) connected to the rear wheel 15 (see FIG. 1).

  The left and right rear pillars 14 extend in the vehicle vertical direction so as to connect the wheel house 16 and the roof side rail 9, open toward the rear inner panel 20, and approach the rear outer panel 21. A bulging rein hose 22 having a substantially hat-shaped cross section is disposed.

  Here, at least a part of the rein hose 22 may be formed so as to abut against the inner side surface of the rear outer panel 21, and the abutment surfaces of both may be joined by an adhesive or the like (see the two-dot chain line in FIG. 4). . In such a case, the tension rigidity of the rear outer panel 21 can be increased.

  The rein hose 22 has front and rear flange portions 22a and 22b formed over substantially the entire length in the vertical direction thereof, and the front and rear flange portions 22a and 22b are coupled to the rear inner panel 20. Yes. As a result, the rear inner panel 20 and the rein hose 22 form a rectangular tube-shaped closed cross-section portion b extending in the vertical direction.

  The upper flange portion 22c of the rein hose 22 is coupled to the rear end portion 9a of the roof side rail 9, and the lower flange portion 22d is coupled to the wheel outer 16a so as to surround the suspension support hole 16g of the wheel inner 16b. Yes. As a result, the push-up load from the rear wheel 15 is received by the rein hose 22.

  A door lock mounting seat 21b is formed at the center in the vertical direction of the rear outer panel 21 of the rear pillar 14. The rear outer 21 is coupled with a door lock reinforcing member 23 having a substantially L-shaped cross section disposed along the door lock mounting seat 21b. The door lock reinforcing member 23 reinforces the door lock mounting seat 21b and suppresses the rear pillar 14 and the rear door 4 from entering the room a side at the time of a side collision.

  A seat belt retractor mounting hole 20b is formed at the center in the vertical direction on the front side of the rein hose 22 of the rear inner panel 20. The seat belt retractor 24 of the seat belt device is accommodated in the retractor mounting hole 20b so as to be exposed to the vehicle compartment a side, and the seat belt retractor 24 is attached to the rear inner panel 20.

  The seat belt retractor 24 winds webbing (not shown) freely in a normal use state while winding it in the storage direction at all times, and locks the webbing immovably in the event of a vehicle collision. The seated rear passenger is restrained by the rear seat 7.

  A pair of front and rear belt anchor mounting seats 20c and 20d are formed above the retractor mounting hole 20b on the front side of the rein hose 22 of the rear inner panel 20. Front and rear belt anchors (not shown) are attached to the front and rear belt anchor mounting seats 20c and 20d before the webbing unwound from the seat belt retractor 24 is guided and supported by the rear seat 7. The front belt anchor guides the webbing to the occupant seated on the outside of the rear seat 7, and the rear belt anchor guides the webbing to the occupant seated in the center of the rear seat 7.

  In the rear pillar 14, a first reinforcement that extends so as to substantially connect the retractor mounting hole 20 b and the front and rear belt anchor mounting seats 20 c and 20 d and forms a first closed cross section c with the rear inner panel 20. A member 25 is disposed.

  The first reinforcing member 25 is made of sheet metal, and has a fan-shaped widened portion 25a that widens in the front-rear direction and the outward direction from the upper edge toward the lower edge, and the front and rear edges of the widened portion 25a. Are substantially in the shape of a hat with a substantially transverse cross section having front and rear coupling portions 25b and 25c respectively extending forward and rearward.

  The front coupling portion 25b extends stepwise forwardly between the rear inner panel 20 and the rear outer panel 21 substantially along the rear outer panel 21, and the front edge portion 25d of the front coupling portion 25b is a rear pillar. The front edge part (rear door opening part) 14a of 14 is couple | bonded by spot welding.

  The rear edge portion 25e of the rear coupling portion 25c is coupled to the rear inner panel 20 by spot welding together with the front flange portion 22a of the rein hose 22.

  The expanded portion 25a is formed so as to cover the substantially upper half of the retractor mounting hole 20b from the outside, and is in a first closed cross section c surrounded by the expanded portion 25a and the rear inner panel 20. The seat belt retractor 24 is disposed. Thereby, both the rigidity of the retractor mounting hole 20b and the support rigidity of the seat belt retractor 24 are enhanced.

  The lower end portion 25 h of the first reinforcing member 25 is extended so as to be positioned at the same height as the belt line L. Specifically, when viewed in the front-rear direction, the lower end portion 25 h of the first reinforcing member 25 and the belt line L are disposed so as to overlap each other. Thereby, the 1st reinforcement member 25 is arrange | positioned on the straight line which ties each belt line rein hose (not shown) arrange | positioned at the front door 3 and the rear door 4, respectively.

  On the upper side of the first reinforcing member 25 in the rear pillar 14, a plurality of second ends extending in the front-rear direction from the front edge portion 14 a to the rear edge portion 14 b of the rear pillar 14 and in the front-rear direction with the rear inner panel 20. A belt-like second reinforcing member 26 that forms closed cross sections d1, d2, and d3 is disposed.

  The second reinforcing member 26 includes a front connecting portion 26a that connects the front edge portion 14a and the reinhose 22, and a rear connecting portion 26b that is bent inward and extends following the rear edge of the front connecting portion 26a. It is arranged so as to pass between the rein hose 22 and the rear inner panel 20.

  The second reinforcing member 26 is formed with front and rear contact portions 26c and 26d that are in contact with the front and rear belt anchor mounting seats 20c and 20d. A front flange portion 22a of the rein hose 22 is superimposed on the rear contact portion 26d, and belt anchor support members 27 and 28 are fixed to the front and rear contact portions 26c and 26d.

  The front edge portion 26e of the second reinforcing member 26 is coupled to the front edge portion (rear door opening portion) 14a of the rear pillar 14 by spot welding, and the rear edge portion 26f is a rear edge portion (back door opening) of the rear pillar 14. Part) 14b by spot welding. The front connecting portion 26a is coupled to the front and rear flange portions 22a and 22b of the rein hose 22.

  The upper edge portion 25g of the first reinforcing member 25 is joined to the lower edge portion 26g of the front connecting portion 26a of the second reinforcing member 26 by welding. In this way, the second reinforcing member 26 is coupled to the rear edge 14b together with the rein hose 22 from the front edge 14a of the rear pillar 14, and the first reinforcing member 25 is connected to the front edge 14a of the rear pillar 14. Along with the second reinforcing member 26, the rein hose 22 is spanned and coupled.

  According to the present embodiment, in the rear pillar 14, the closed cross section b is formed so as to roughly connect the seat belt retractor mounting hole 20 b and the front and rear belt anchor mounting seats 20 c and 20 d and the rear inner panel 20. Since the first reinforcing member 25 is disposed and the first reinforcing member 25 is bridged over the front edge portion 14a of the rear pillar 14 and the rein hose 22, the rigidity of the retractor mounting hole 20b of the rear pillar 14 with respect to the input at the time of a side collision. Can be increased. As a result, deformation of the rear pillar 14 toward the interior a with the retractor mounting hole 20b as a starting point can be suppressed, and the amount of the rear door 4 entering the interior a can be suppressed.

  Further, the first reinforcing member 25 can increase the rigidity of the retractor mounting hole 20b and the front and rear belt anchor mounting seats 20c and 20d, and even if a load on the side of the vehicle compartment a acts on the belt anchor at the time of a vehicle collision. The first reinforcing member 25 bears the load, and the rear pillar 14 can be prevented from being deformed to the passenger compartment side.

  In the present embodiment, the second reinforcing member 26 integrally coupled to the first reinforcing member 25 is brought into contact with the front and rear belt anchor mounting seats 20c and 20d, and the front edge portion 14a of the rear pillar 14 and the rein hose 22 are connected. Since it is interposed and joined to the rear edge portion 14b, the input at the time of a side collision is borne by the first and second reinforcing members 25 and 26, and the rear pillar 14 is more surely entered into the room a. Can be suppressed.

  Since the lower end portion 25h of the first reinforcing member 25 is extended so as to be positioned at the same height as the belt line L, each belt line rein hose provided at the front door 3 and the rear door 4 is used for input at the time of frontal collision. Can be efficiently transmitted to the first reinforcing member 25 via the.

  In the above embodiment, the first and second reinforcing members 25 and 26 are formed separately, and both the reinforcing members 25 and 26 are integrally joined by welding. However, in the present invention, the first and second reinforcing members are combined. 25 and 26 may be integrally formed by press molding.

1 is a side view of a rear body of an automobile according to an embodiment of the present invention. It is sectional drawing (II-II sectional view taken on the line of FIG. 1) of the said rear vehicle body. FIG. 3 is a sectional view of the rear vehicle body (a sectional view taken along line III-III in FIG. 1). It is sectional drawing (IV-IV sectional view taken on the line of FIG. 1) of the said rear vehicle body. It is sectional drawing (VV sectional view taken on the line of FIG. 1) of the said rear vehicle body. It is a side view of the said motor vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 'Rear body 2b Rear door opening 8 Roof panel 9 Roof side rail 14 Rear pillar 14a Front edge (rear door opening)
14b Rear edge (back door opening)
16 Wheel house 20 Rear inner panel 20b Seat belt retractor mounting holes 20c, 20d Belt anchor mounting seat 21 Rear outer panel 22 Rein hose 25 First reinforcing member 26 Second reinforcing member c Closed section

Claims (2)

A rear pillar that forms a rear door opening with an inner panel and an outer panel, a roof panel connected to the upper end portion of the rear pillar, and a wheel house connected to the lower end portion. A rein hose extending in the vehicle vertical direction to connect the panel and forming a closed cross section with the inner panel is disposed, and a seat belt retractor mounting portion is disposed at a predetermined interval in the vertical direction on the front side of the rein hose of the inner panel. In the rear car body structure of the automobile formed with the belt anchor mounting part,
In the rear pillar, a first reinforcing member that extends so as to substantially connect the seat belt retractor mounting portion and the belt anchor mounting portion and that forms a closed section with the inner panel is provided.
A rear body structure of an automobile, wherein the first reinforcing member is bridged and joined to the rear door opening and the rein hose. 2. The first reinforcing member according to claim 1, wherein a second reinforcing member is provided integrally with the first reinforcing member, the second reinforcing member is brought into contact with the belt anchor mounting portion, and spanned between the rear door opening and the rein hose. The rear body structure of an automobile characterized by being connected together.

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