JP5298720B2 - Body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the mounting rigidity and strength of a mounting bracket for supporting a fuel tank to a vehicle body panel while suppressing the increase of vehicle body mass with a simple means. <P>SOLUTION: A cross member 12 (skeleton member) is arranged on a front surface 10F (one surface) of a rear partition 10 (vehicle body panel), and the mounting bracket 14 for supporting the fuel tank is arranged on a rear surface 10R (another surface) of the rear partition 10 opposite to the cross member 12 side to interpose the rear partition 10 between itself and the cross member 12. The rear partition 10, the cross member 12 and the mounting bracket are fastened and fixed by a rivet 16 in a stacked state. As for the cross member 12, a general cross member is used for the reinforcement of the rear partition 10. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a vehicle body structure.

A vehicle body panel structure having a vertical member, an EA cross, and a horizontal cross mainly configured by CFRP (Carbon Fiber Reinforced Plastics) is disclosed (see Patent Document 1).
JP 2008-68720 A

  Generally, a fuel tank of a vehicle is fixed to a vehicle body panel using a mounting bracket. However, since the rigidity of the vehicle body panel itself is generally low, it is difficult to increase the mounting rigidity and mounting strength of the mounting bracket. As a countermeasure, if the plate thickness is increased in order to increase the mounting rigidity and mounting strength of the mounting bracket, or if a new reinforcing member is added in addition to the existing reinforcing member, the mass of the vehicle body is increased.

  In view of the above facts, an object of the present invention is to increase the mounting rigidity and mounting strength of a mounting bracket for supporting a fuel tank with respect to a vehicle body panel while suppressing an increase in vehicle body mass by simple means.

The invention according to claim 1 is a vehicle body panel having a thin region and a thick region, a skeleton member disposed on one surface of the vehicle body panel for reinforcing the vehicle body panel, and the vehicle body between the skeleton member. A mounting bracket for supporting a fuel tank that is disposed on the other surface of the vehicle body panel on the opposite side to the skeleton member side so as to sandwich the panel, and is mounted across the thin region and the thick region ; And fastening means for fastening and fixing the vehicle body panel, the skeleton member, and the mounting bracket in a stacked state.

In the vehicle body structure according to claim 1, the skeleton member is disposed on one surface of the vehicle body panel having a thin region and a thick region, and the vehicle body panel is sandwiched between the skeleton member and the skeleton member side. A mounting bracket for supporting the fuel tank is disposed on the other surface of the vehicle body panel opposite to the thin wall region and the thick wall region, and the vehicle body panel, the frame member and the mounting bracket are overlapped with the fastening means By fastening and fixing by the above, it is possible to increase the mounting rigidity and mounting strength of the mounting bracket to the vehicle body panel. Since the mounting rigidity and mounting strength of the mounting bracket are increased by a simple means of using a skeleton member for reinforcing the vehicle body panel, it is possible to suppress an increase in the mass of the vehicle body.

  According to a second aspect of the present invention, in the vehicle body structure according to the first aspect, the vehicle body panel is made of a carbon fiber reinforced resin.

  In the vehicle body structure according to claim 2, the mounting rigidity and the mounting strength of the mounting bracket can be increased by overlapping and fixing the frame member and the mounting bracket for supporting the fuel tank on the vehicle body panel made of carbon fiber reinforced resin. Can be increased.

  According to a third aspect of the present invention, in the vehicle body structure according to the first or second aspect, a rivet is used as the fastening means.

  In the vehicle body structure according to the third aspect, since the rivet is used as the fastening means, the fastening work can be easily performed. Moreover, since rivets are generally light and inexpensive, it is possible to suppress an increase in vehicle body mass and an increase in vehicle body manufacturing cost.

  As described above, according to the vehicle body structure described in claim 1 of the present invention, the mounting rigidity of the mounting bracket for supporting the fuel tank with respect to the vehicle body panel can be reduced while suppressing an increase in the vehicle body mass by simple means. An excellent effect that the mounting strength can be increased is obtained.

  According to the vehicle body structure of the second aspect, it is possible to obtain an excellent effect that the mounting rigidity and the mounting strength of the mounting bracket can be increased.

  According to the vehicle body structure of the third aspect, it is possible to easily perform the fastening operation and to obtain an excellent effect that an increase in the vehicle body mass and an increase in the vehicle body manufacturing cost can be suppressed.

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

[First Embodiment]
In FIG. 1, a vehicle body structure S1 according to the present embodiment is an example of a rear partition 10 as an example of a vehicle body panel, a cross member 12 as an example of a skeleton member, a mounting bracket 14 for supporting a fuel tank, and a fastening means. And rivets 16.

  The rear partition 10 is made of, for example, a carbon fiber reinforced resin (CFRP) that partitions between a vehicle seat 18 (see also FIG. 4) and a fuel tank 20 disposed on the vehicle rear side of the vehicle seat 18. It is a plate-shaped member. The rear partition 10 has, for example, a thin area on the upper side of the vehicle and a thick area on the lower side of the vehicle. The mounting bracket 14 is mounted across the thin region and the thick region. Note that the mounting position of the mounting bracket 14 does not need to straddle the thin region and the thick region, and may be a thin region or a thick region.

  The cross member 12 is a skeleton member made of, for example, carbon fiber reinforced resin (CFRP) that is disposed on one surface of the rear partition 10, for example, the front surface 10 </ b> F, and reinforces the rear partition 10. As shown in FIG. 2, the cross member 12 is formed, for example, in a cross-sectional hat shape, and extends in the vehicle width direction along the front surface 10 </ b> F of the rear partition 10. As shown in FIG. 1, the cross member 12 is joined to the front surface 10 </ b> F of the rear partition 10 using, for example, an adhesive (not shown) at the upper and lower flange-like joining portions 12 </ b> A and 12 </ b> B. Thus, a closed cross section 22 is formed between the rear partition 10 and the cross member 12. The rear partition 10 and the cross member 12 are not only joined by an adhesive, but also fastened and fixed by rivets 16 as will be described later.

  1 and 2, the mounting bracket 14 for supporting the fuel tank is on the other side of the rear partition 10 opposite to the cross member 12 side so as to sandwich the rear partition 10 between the cross member 12; It is arrange | positioned by 10R of rear surfaces, and is comprised so that the fuel tank 20 can be supported. A plurality of mounting brackets 14 are arranged on the rear surface 10R of the rear partition 10 at a predetermined interval in the vehicle width direction (see FIG. 6). The fuel tank 20 is supported on the rear partition 10 by these mounting brackets 14.

  The mounting bracket 14 is formed in a hollow structure having a substantially triangular cross-section in a side view of the vehicle by, for example, extruding an aluminum material, and includes a front wall portion 14A along the rear surface 10R of the rear partition 10 and the front wall portion 14A. A lower wall portion 14B extending substantially horizontally from the lower portion to the rear of the vehicle, and a rear wall portion 14C extending from the rear end of the lower wall portion 14B upward and obliquely forward to the vehicle and connected to the upper portion of the front wall portion 14A. It is configured.

  The upper end of the front wall portion 14A extends along the rear surface 10R of the rear partition 10 above the vehicle from the upper end of the rear wall portion 14C, and serves as a joint portion 14D for the rear surface 10R. The lower end of the front wall portion 14A extends below the vehicle from the front end of the lower wall portion 14B along the rear surface 10R of the rear partition 10, and serves as a joint portion 14E for the rear surface 10R. The joint 14D on the upper side of the vehicle is disposed at a position overlapping the rear partition 10 and the joint 12B on the lower side of the cross member 12 in the thickness direction.

  For example, a hollow portion 14F having a substantially rectangular cross section is formed in the rear portion of the lower wall portion 14B of the mounting bracket 14, and a nut 24 is assembled in the hollow portion 14F. The hollow portion 14F is formed with a through hole 14J through which a bolt 32 described later is passed from the vehicle lower side.

  The mounting bracket 14 is fastened and fixed to the rear surface 10R of the rear partition 10 using the rivets 16 and 17 in the front wall portion 14A. However, the mounting bracket 14 may be joined by an adhesive (not shown). Good.

  Here, the fuel tank 20 is, for example, a resin container. On the front side of the fuel tank 20, that is, on the rear partition 10 side, for example, a mounting flange 20 </ b> A that projects substantially horizontally in front of the vehicle is integrally formed. As shown in FIG. 2, a through hole 20B is formed in the mounting flange 20A. For example, a rubber bush 26 is assembled in the through hole 20B using resin collars 28 and 30. Since the bush 26 and the collars 28 and 30 are configured to be divided in the vehicle vertical direction, one bush 26 is fitted from the vehicle upper side of the through hole 20B, and the other bush 26 is fitted from the vehicle lower side of the through hole 20B. Can be included.

  Bolts 32 are inserted into the collars 28 and 30 from the lower side of the vehicle, and the bolts 32 are fastened to the nuts 24 assembled to the hollow portions 14F of the mounting bracket 14 so that the fuel tank 20 is assembled to the mounting bracket 14. As a result, the fuel tank 20 is elastically supported by the mounting bracket 14 fastened and fixed to the rear surface 10R of the rear partition 10 via the bush 26. The through hole 20B may be configured as a notch-shaped hole.

  1 and 2, a rivet 16 is a fastening means that fastens and fixes the rear partition 10, the cross member 12, and the mounting bracket 14 in an overlapped state. Specifically, the rivet 16 has a joint 14D on the vehicle upper side of the mounting bracket 14 overlapped with the joint 12B of the rear partition 10 and the cross member 12, and is fastened and fixed. Note that the joint 14E on the vehicle lower side of the mounting bracket 14 is fastened and fixed to, for example, a thick region in the rear partition 10 by a rivet 17 similar to the rivet 16. The joint 14E on the vehicle lower side is fastened to the thick region of the rear partition 10 in this way, thereby increasing the attachment rigidity and attachment strength with respect to the rear partition 10.

  As shown in FIG. 2, a through hole 14G through which the rivet 16 is passed is formed in the joint 14D on the vehicle upper side in the mounting bracket 14, and a rivet 17 is passed through the joint 14E on the vehicle lower side. A through hole 14H is formed. The rear partition 10 is also formed with through holes 10B and 10C for allowing the rivets 16 and 17 to pass therethrough. Further, a through hole 12C for allowing the rivet 16 to pass through is formed in the joint portion 12B on the lower side of the cross member 12. The number of rivets 16 and 17 is not limited to the illustrated example.

  In FIG. 1, the front surface 10 </ b> F, the cross member 12, and the like of the rear partition 10 are covered with a carpet 34 from the passenger compartment side.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. 1 and 2, in the vehicle body structure S1 according to the present embodiment, the cross member 12 is disposed on one surface of the rear partition 10, that is, the front surface 10F, and the rear partition 10 is disposed between the cross member 12 and the cross member 12. A mounting bracket 14 for supporting the fuel tank is disposed on the other surface of the rear partition 10 opposite to the cross member 12 side, that is, the rear surface 10R so as to sandwich the rear partition 10, the cross member 12, and the mounting bracket 14. It is fastened and fixed by the rivet 16 in the stacked state. As described above, the rear partition 10, the cross member 12, and the fuel tank support mounting bracket 14 are overlapped to form a three-piece joint, so that the mounting bracket 14 can be attached to the rear partition 10 made of carbon fiber reinforced resin. It is possible to increase the mounting strength.

  The skeleton member such as the cross member 12 is a member generally used for reinforcing a vehicle body panel such as the rear partition 10 and does not need to be newly added. In the present embodiment, the simple means of using the cross member 12 increases the mounting rigidity and mounting strength of the mounting bracket 14 with respect to the rear partition 10, so that an increase in vehicle body mass can be suppressed.

  Further, since the rivet 16 is used as a fastening means for fastening the mounting bracket 14 for supporting the fuel tank to the rear partition 10 and the cross member 12, the fastening work can be easily performed. Further, since the rivet 16 is generally light and inexpensive, it is possible to suppress an increase in vehicle body mass and an increase in vehicle body manufacturing cost.

[Second Embodiment]
3 to 6, the vehicle body structure S2 according to the present embodiment has a structure in which a tether strap 40 is coupled to the cross member 12 in addition to the configuration of the first embodiment.

  As shown in FIG. 3, for example, a child seat 42 is installed on the vehicle seat 18 adjacent to the front side of the rear partition 10. A through hole 46 through which the passenger restraining webbing 44 is passed is formed in the side portion of the child seat 42, and the passenger restraining webbing 44 is passed through the through hole 46. A tongue plate 48 is attached to an end portion of the passenger restraining webbing 44, and the tongue plate 48 is inserted into and connected to a buckle device 50 disposed on a side portion of the vehicle seat 18. The child seat 42 is restrained against the seat back 52 and the seat cushion 54 of the vehicle seat 18 by the occupant restraining webbing 44.

  In FIG. 3, the tether strap 40 is a non-extensible belt having a tensile strength equivalent to that of the occupant restraining webbing 44, for example. As shown in FIG. 4, the rear end 40 </ b> B of the tether strap 40 is connected to the cross member 12 positioned near the vehicle rear side of the seat back 52 using a tether anchor 56. The tether strap 40 is routed between the upper end of the seat back 52 and the headrest 64 from the back side of the seat back 52, for example, and forward of the seat back 52 in the vehicle. As shown in FIG. 3, for example, an upper edge 42U of the child seat 42 is provided with a connecting portion 42A, and a front end 40A of the tether strap 40 is connected to the connecting portion 42A. The front end 40A is configured to be detachable from the connecting portion 42A, for example. Note that the method of handling the tether strap 40 is not limited to this.

  The connection of the tether strap 40 to the cross member 12 will be described in more detail. As shown in FIG. 5, a tether anchor 56 is connected to the rear end 40 </ b> B of the tether strap 40. The tether anchor 56 is made of, for example, a steel plate. The tether anchor 56 is formed with, for example, a substantially rectangular through hole 56A through which the rear end 40B of the tether strap 40 can pass and a circular through hole 56B through which the bolt 60 can pass. The rear end 40 </ b> B of the tether strap 40 is passed through the through hole 56 </ b> A of the tether anchor 56, folded back, and sewn to the general part of the tether strap 40, thereby being connected to the tether anchor 56.

  The tether anchor 56 is disposed on the front side of the general portion 12D of the cross member 12. A reinforcing tether anchor bracket 58 is disposed on the rear surface side of the cross member 12 in the closed section 22. The tether anchor bracket 58 is configured, for example, by press-molding a steel plate, and has a substantially C-shaped cross section along the cross sectional shape of the cross member 12 in the closed cross section 22. A through hole 12E through which the bolt 60 is passed is formed in the general portion 12D of the cross member 12. The tether anchor bracket 58 is also formed with a through hole 58A for allowing the bolt 60 to pass therethrough. A nut 62 corresponding to the bolt 60 is fixed to the rear surface side of the tether anchor bracket 58 in advance.

  In a state where the three cross members 12 are stacked between the tether anchor 56 and the tether anchor bracket 58, the bolts 60 are passed through the through holes 56B, 12E, and 58A from the tether anchor 56 side and fastened to the nut 62. Thus, the tether anchor 56 is connected to the cross member 12.

  As shown in FIG. 6, two tether straps 40 are provided on the left and right sides of one vehicle seat 18 (FIG. 3). However, the number of tether straps 40 is not limited to this. There may be three or more.

  Since other parts are the same as those in the first embodiment, the same parts are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 3, in the vehicle body structure S <b> 2 according to the present embodiment, the inertia force of the child seat 42 is generated in the arrow F direction at the time of a frontal collision of the vehicle. Since the child seat 42 is restrained by the occupant restraining webbing 44 and the tether strap 40, the relative movement of the child seat 42 with respect to the vehicle seat 18 is suppressed, but is connected to the connecting portion 42A of the upper edge 42U of the child seat 42. In the tether strap 40, a tension T based on the inertial force of the child seat 42 is generated. This tension T is transmitted to the cross member 12 via the tether anchor 56 and further transmitted to the fastening portion between the cross member 12 and the rear partition 10.

  Here, since the tether anchor 56 is fastened and fixed by the bolt 60 and the nut 62 in a state where the cross member 12 is sandwiched between the tether anchor bracket 58 and the tether anchor bracket 58, the tension T is crossed from the tether anchor 56. It is possible to stably transmit to the member 12. Further, the cross member 12 is bonded to the front surface 10F of the rear partition 10 at the joint portion 12A on the vehicle upper side and the joint portion 12B on the vehicle lower side, and further, in the joint portion 12B on the vehicle lower side, as in the first embodiment. Since the rear partition 10 and the mounting bracket 14 for supporting the fuel tank are overlapped and joined by three rivets 16, the mounting rigidity and mounting strength of the cross member 12 to the rear partition 10 made of carbon fiber reinforced resin are high. For this reason, the tension T transmitted to the cross member 12 can be stably transmitted to the rear partition 10.

  Thus, in the vehicle body structure S2, the relative movement of the child seat 42 at the time of a vehicle collision can be stably suppressed.

  In each of the above embodiments, the rear partition 10 has been described as an example of the vehicle body panel, but the vehicle body panel may be a portion other than this. The rear partition 10 (vehicle body panel) is made of carbon fiber reinforced resin, but is not limited thereto, and may be a steel plate, for example.

  Although the cross member 12 is cited as the skeleton member, the skeleton member is not limited to this, and is generally used to reinforce the rear partition 10 (vehicle body panel), so long as it is a member that does not require new addition. Good.

  The rivet 16 has been described as the fastening means. However, the fastening means is not limited to this, and any fastening means may be used as long as it is as light and inexpensive as the rivet 16 and sufficient fastening strength is obtained. Therefore, for example, bolts and nuts may be used. Further, if the skeleton member, the vehicle body panel, and the mounting bracket for supporting the fuel tank are all weldable materials, welding may be used as the fastening means.

1 and 2 relate to the first embodiment, and FIG. 1 is an enlarged cross-sectional view showing a vehicle body structure. It is an expansion disassembled perspective view which shows a vehicle body structure. 3 to 6 relate to the second embodiment, and FIG. 3 is a side view showing a state in which the upper part of the child seat installed on the vehicle seat is connected to the cross member by a tether. It is an expanded sectional view which shows a vehicle body structure. It is an expansion disassembled perspective view which shows a vehicle body structure. It is an expansion perspective view which shows a vehicle body structure.

Explanation of symbols

10 Rear partition (body panel)
10F front (one side)
10R rear surface (the other surface)
12 Cross member (frame member)
14 Mounting bracket 16 Rivet (fastening means)
20 Fuel tank S1 Body structure S2 Body structure

Claims (3)

A vehicle body panel having a thin region and a thick region ;
A skeleton member disposed on one surface of the vehicle body panel to reinforce the vehicle body panel;
The vehicle body panel is disposed on the other surface of the vehicle body panel opposite to the frame member side so as to sandwich the vehicle body panel between the frame member and the frame member, and is attached across the thin region and the thick region. A mounting bracket for supporting the fuel tank;
Fastening means for fastening and fixing the vehicle body panel, the skeleton member, and the mounting bracket in a stacked state;
A vehicle body structure.   The vehicle body structure according to claim 1, wherein the vehicle body panel is made of carbon fiber reinforced resin.   The vehicle body structure according to claim 1, wherein a rivet is used as the fastening means.

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