JP5256653B2 - Car body side impact load support structure and side impact load support method - Google Patents

Description

  The present invention relates to a side impact load support structure and a side impact load support method for a vehicle body.

Conventionally, a side collision load (collision load) input to the side surface of the vehicle body is transmitted to a load support member (console box) via a load transmission member provided across the vehicle width direction in the seat back of the vehicle seat, A side impact load support structure for a vehicle body that supports a side impact load with the load support member is known. According to such a structure, it is possible to secure a wider living space for an occupant seated on the vehicle seat during a side collision (see, for example, Patent Document 1).
JP 2005-67427 A

  In the conventional side-impact load support structure, the load transmission member is installed between the side frames facing each other on both sides in the vehicle width direction in the seat back.

  In such a configuration, when a side collision load is input, if the side frame is deformed due to some unintentional factor, there is a possibility that the transmission efficiency of the side collision load by the load transmission member is lowered.

  The present invention seeks to obtain a side impact load support structure and a side impact load support method for a vehicle body that can more efficiently transmit a side impact load while suppressing deformation of the side frame.

The present invention, in the connecting portion between the vehicle width direction outer side of the side frame and the load transfer member in the seat back, to suppress the reinforcing portion from the side frame deforms provided by the side impact load, the reinforcing portion, in the vehicle width The most important feature is that it is disposed on the inner side in the vehicle width direction of the side frame on the outer side in the direction and on the front side of the load transmitting member .

  According to the present invention, the side frame can be prevented from being deformed by the reinforcing portion, so that the input side impact load can be transmitted more efficiently by the load transmitting member.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings.

  (First Embodiment) FIGS. 1 to 3 show a side impact load support structure and a side impact load support method for a vehicle body according to a first embodiment of the present invention. Among these, FIG. 1 is a vertical cross-sectional view in which a vehicle body provided with a side impact load support structure according to the present embodiment is crossed by a vehicle seat arrangement portion. In each figure, FR indicates the front of the vehicle, WO indicates the outer side in the vehicle width direction, and UP indicates the upper side.

  In the vehicle 1 to which the vehicle body side impact load support structure according to the present embodiment is applied, as shown in FIG. 1, a floor tunnel 3 having an inverted U-shaped cross section is provided at the vehicle longitudinal direction center portion of the vehicle body floor 2. It extends along the direction. A pair of vehicle seats 4 is installed on the vehicle body floor 2 which is the left and right sides of the floor tunnel 3. In FIG. 1, only the left vehicle seat 4 is shown.

  The vehicle seat 4 includes a seat cushion 4C, a seat back 4B, and a headrest 4H. A rail 5a extending along the vehicle front-rear direction is fixed to the vehicle body floor 2, and a leg portion 5b of the vehicle seat 4 is slidably attached to the rail 5a (can be slid forward and backward). That is, the seat slide device 5 is configured by the rails 5a and the leg portions 5b. Further, the seat cushion 4C and the seat back 4B are connected to each other via a seat reclining mechanism 6 so as to be tiltable.

  Side sills 7 having a closed cross-sectional structure extend in the vehicle front-rear direction at both ends in the vehicle width direction of the vehicle body floor 2. A cross member 8 is installed between the pair of left and right side sills 7, and the vehicle body floor 2 is joined to the cross member 8. The side sill 7 serves as a lower edge of the side opening, and a side door 9 is provided to close the side opening so as to be opened and closed. In the present embodiment, the outer side surface 9a of the side door 9 serves as a vehicle body side portion to which a side collision load is input.

  FIG. 2 is an exploded perspective view showing a part of a side impact load support structure for a vehicle body according to the present embodiment. As shown in FIGS. 1 and 2, a seat back frame 10 as a skeleton member of the seat back 4 </ b> B includes an upper frame 10 </ b> U that is bent in a substantially inverted U shape and disposed at the upper end, and an upper frame. A pair of side frames 10 </ b> S <b> 1 and 10 </ b> S <b> 2 extending vertically are joined to at least the lower end of 10 </ b> U.

  The pair of side frames 10S1 and 10S2 are each formed in a flat plate shape with the front and back surfaces facing the vehicle width direction, and are disposed to face each other at both sides in the vehicle width direction within the seat back 4B. Moreover, the front-rear width is gradually reduced upward. The front and rear and lower edges are bent inward in the vehicle width direction to form a substantially U-shaped flange portion 10b, and the front and rear edge flange portions 10b and 10b face each other with a gap at the upper end. Opening 10c is formed. The lower end of the upper frame 10U is inserted into the opening 10c and welded to the side frames 10S1 and 10S2 while being sandwiched between the flanges 10b and 10b.

  The seat reclining mechanism 6 is disposed at the lower ends of the side frames 10S1 and 10S2, and includes a reclining shaft 6a extending along the rotation center and a rotation arm 6b rotating about the rotation center. . The rotating arm 6b is coupled to the lower ends of the side frames 10S1 and 10S2 by bolts 6c. The seat reclining mechanism 6 can adjust the tilting posture of the seat back 4B.

  Further, in the present embodiment, between these side frames 10S1 and 10S2, an inclination is made such that an end portion (outer end portion) 12a on the outer side in the vehicle width direction is up and an end portion (inner end portion) 12b on the inner side in the vehicle width direction is down. In the posture, the sheet reinforcing member 12A is installed. As shown in FIG. 1, the outer end 12a of the seat reinforcing member 12A faces the outer side 9a of the side door 9 as the vehicle body side, and the inner end 12b of the center console box 11 as the load support member. Opposite the side wall 11S. The sheet reinforcing member 12A extends linearly between the side frames 10S1 and 10S2, and is specifically formed in a straight tube having a substantially rectangular cross section.

  The side frame 10S1 on the outer side in the vehicle width direction is provided with a load transmission piece 15 that protrudes outward in the vehicle width direction at substantially the same height as the outer end 12a of the seat reinforcing member 12A. The load transmission piece 15 is disposed to face the upper end portion of the door armrest 16. Further, as shown in FIG. 1, the door armrest 16 is formed by bulging an occupant elbow portion position of a door trim 9 b attached to the inside of the side door 9 toward the vehicle interior side. On the other hand, the inner end portion 12b of the seat reinforcing member 12A is disposed at a position corresponding to the inner portion of the seat reclining mechanism 6 in the vehicle width direction.

  With this configuration, the side impact load F (see FIG. 1) input to the outer side surface 9a of the side door 9 as the side surface of the vehicle body at the time of a side collision is accompanied by deformation of each part in the vehicle 1 while the door armrest 16, The load is transmitted to the center console box 11 via the load transmission piece 15, the seat reinforcing member 12A, and the seat reclining mechanism 6 on the inner side in the vehicle width direction. That is, in the present embodiment, the load transmitting piece 15, the seat reinforcing member 12A, and a part of the seat reclining mechanism 6 correspond to the load transmitting member 12 (strictly speaking, members interposed between them (side frames 10S1, The center console box 11 corresponds to a load supporting member. Further, the load transmission piece 15 corresponds to a load input unit.

  As shown in FIG. 1, the center console box 11 has a container-like console reinforcing member 11 a coupled to the upper surface of the floor tunnel 3 via a fastening member 13 such as a bolt and a nut. And the outer side of the console reinforcement member 11a is coat | covered with the skin material 11b, and the upper-end opening part of it is closed by the cover body 11c so that opening and closing is possible. Thus, the console reinforcement member 11a attached to the floor tunnel 3 can support a larger load.

  Here, in this embodiment, as shown in FIGS. 1 and 2, the side frame is applied to the connecting portion between the seat reinforcing member 12 </ b> A as the load transmitting member 12 and the side frame 10 </ b> S <b> 1 on the outer side in the vehicle width direction by a side collision load. A side frame reinforcing member 14 is provided as a reinforcing portion (reinforcing structure) that suppresses deformation of 10S1.

  FIG. 3 is a plan view of the seat back frame. As shown in FIGS. 2 and 3, the side frame reinforcing member 14 is disposed on the inner side in the vehicle width direction of the side frame 10S1 and on the front side of the seat reinforcing member 12A (the end portion 12a on the outer side in the vehicle width direction).

  Specifically, the seat reinforcing member 12A is installed between the rear ends of the side frames 10S1 and 10S2, and the side frame reinforcing member 14 includes the front surface 12f of the seat reinforcing member 12A and the inner side surface 10a of the side frame 10S1. It is welded to cover the corners.

  That is, as shown in FIGS. 1 to 3, the side frame reinforcing member 14 is formed in a hollow box shape having an upper wall 14a, a lower wall 14b, a front wall 14c, and an inclined end wall 14d. And the extension part 14a1, 14b1 of the rear side edge of the upper wall 14a and the lower wall 14b is joined to the upper and lower side surfaces of the seat reinforcing member 12A, and the outer side edge of the upper wall 14a, the lower wall 14b, and the front wall 14c. Are attached to the inner side surface 10a on the inner side in the vehicle width direction of the side frame 10S1. A mounting piece 14d1 extending from the inner edge of the end wall 14d is joined to the front surface 12f of the sheet reinforcing member 12A. Although not shown, an attachment piece similar to the attachment piece 14a2 is provided on the vehicle outer edge of the lower wall 14b, and the attachment piece 14a2 is joined to the inner side surface 10a of the side frame 10S1. Thus, the side frame reinforcing member 14 is firmly coupled across the sheet reinforcing member 12A and the side frame 10S1.

  At this time, the front-rear width W1 of the side frame reinforcing member 14 is set to a length sufficient to suppress deformation of the side frame 10S1 (particularly, twisting or bending deformation in the direction in which the front edge side is directed inward in the vehicle width direction). The Specifically, for example, it is set to a length that is at least half of the front-rear width W2 of the side frame 10S1 (W1> 0.5 × W2).

  And the load transmission piece 15 which becomes the edge part of the vehicle width direction outer side of the load transmission member 12 is arrange | positioned corresponding to the vehicle width direction outer side of the side frame reinforcement member 14. As shown in FIG. That is, in this embodiment, as shown in FIGS. 1 and 3, the outer peripheral end surface on the inner side in the vehicle width direction of the load transmitting piece 15 and the outer side in the vehicle width direction of the portion where the side frame reinforcing member 14 is coupled to the seat reinforcing member 12A. Is substantially abutted on both sides of the side frame 10S1. Further, the cross-sectional areas of both of them are substantially matched.

  As described above, according to the present embodiment, when the side collision load F is input from the outer surface 9a of the side door 9 at the time of a side collision, the pair of side frames 10S1 and 10S2 in the seat back 4B of the vehicle seat 4 are provided. The load transmission member 12 installed across the vehicle width direction is brought into contact with the center console box 11 provided at the vehicle width direction center portion on the vehicle body floor 2, and the side impact load is passed through the seat reinforcing member 12A. It can be transmitted to and supported by the center console box 11. That is, at the time of a side collision, the load transmission member 12 supported by the center console box 11 is stretched in the vehicle width direction, and a living space for an occupant seated on the vehicle seat 4 can be secured.

  At this time, in the present embodiment, the deformation of the side frame 10 </ b> S <b> 1 is suppressed by the side frame reinforcing member 14, so that the side collision load can be efficiently transmitted to the center console box 11 via the load transmitting member 12. Therefore, it is possible to more reliably secure the living space for the passenger sitting on the vehicle seat 4.

  Further, in the present embodiment, the side frame reinforcing member 14 is disposed on the inner side in the vehicle width direction of the side frame 10S1 on the outer side in the vehicle width direction and on the front side of the seat reinforcing member 12A. For this reason, the side frame 10S1 is prevented from being twisted or bent in the direction toward the inner side in the vehicle width direction of the side frame 10S1, and the seatback 4B is prevented from rotating or deforming in this direction. It can be suppressed from occurring.

  Moreover, in this embodiment, since the side frame reinforcement member 14 was made into the hollow structure, it can be reduced in weight compared with the case where it is set as a solid structure.

  Further, in this embodiment, the load transmission projecting from the side frame 10S1 to the outer side in the vehicle width direction corresponding to the outer side in the vehicle width direction of the side frame reinforcing member 14 at the end portion on the outer side in the vehicle width direction of the load transmission member 12. A piece 15 is provided. Accordingly, the side impact load can be transmitted more efficiently by using the load transmitting piece 15 and the side frame reinforcing member 14, and the living space for the occupant seated on the vehicle seat 4 can be ensured more reliably. .

  In the present embodiment, the sheet reinforcing member 12A as the load transmitting member 12 between the pair of side frames 10S1 and 10S2 is formed in a straight line. For this reason, compared with the case where the sheet reinforcing member is bent, the side impact load can be transmitted more efficiently, and the effect of the side impact load support structure and the side impact load support method of the vehicle body according to the present embodiment is achieved. Can be obtained more reliably. In addition, there is an advantage that the weight can be reduced as compared with the case of bending. Furthermore, in this embodiment, since the sheet reinforcing member 12A is a straight tube and has a hollow structure, the weight can be reduced as compared with a case where the sheet reinforcing member 12A has a solid structure. Further, the bending rigidity of the sheet reinforcing member 12A can be efficiently increased by the amount corresponding to the closed cross-sectional structure.

  Further, in this embodiment, the end of the load transmitting member 12 on the outer side in the vehicle width direction, that is, the load transmitting piece 15 is arranged to face the door armrest 16, so that the load input from the outer surface 9 a of the side door 9 is received. The door armrest 16 can be used to transmit the load quickly and more reliably by the load transmission member 12, and the living space for the passenger sitting on the vehicle seat 4 can be ensured more quickly and more reliably.

  Furthermore, in this embodiment, since the end of the load transmission member 12 on the inner side in the vehicle width direction is disposed at a position corresponding to the seat reclining mechanism 6, a seat reclining mechanism that generally ensures relatively high rigidity is used. Thus, the load can be transmitted to the center console box 11 more quickly and more reliably.

  (Second Embodiment) FIG. 4 shows a side impact load support structure and a side impact load support method for a vehicle body according to a first embodiment of the present invention. Specifically, a side impact load according to this embodiment is shown. It is the vertical sectional view which crossed the vehicle body provided with the support structure by the arrangement | positioning part of a vehicle seat. The side impact load support structure for a vehicle body according to the present embodiment has the same components as the side impact load support structure for a vehicle body according to the first embodiment. Therefore, in the following, common reference numerals are given to those similar components, and redundant description is omitted.

  In the vehicle seat 4A according to the present embodiment, the side frame reinforcing member 14A is formed in a hollow shape having an opening 14e below, and a part of the seat reclining mechanism 6A extends from the opening 14e into the side frame reinforcing member 14A. (For example, an electric motor M or the like) is entered and accommodated.

  That is, according to the present embodiment, the seat frame and the seat reclining mechanism 6A are restrained from being bulky as compared with a case where a part of the seat reclining mechanism 6A is accommodated in the hollow portion of the side frame reinforcing member 14A. can do. Further, since the side frame reinforcing member 14A has a hollow structure, the weight can be reduced as compared with the case where the side frame reinforcing member 14A is solid.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in each of the above embodiments, the center console box is used as the load support member. However, in a vehicle in which the center console box does not exist, another load support member may be provided.

  Moreover, in each said embodiment, although the case where this invention was applied to the vehicle seat of the vehicle right side was illustrated, it cannot be overemphasized that it is applicable also to the vehicle seat of the vehicle left side.

It is the vertical sectional view which crossed the vehicle body provided with the side impact load support structure concerning a 1st embodiment of the present invention in the arrangement part of a vehicle seat. It is a disassembled perspective view which shows a part of side impact load support structure of the vehicle body concerning 2nd Embodiment of this invention. It is a top view of the seat back frame of the vehicle seat provided with the side impact load support structure of the vehicle body concerning a 1st embodiment of the present invention. It is the vertical sectional view which crossed the vehicle body provided with the side collision load support structure concerning a 2nd embodiment of the present invention at the arrangement part of a vehicle seat.

Explanation of symbols

2 Body floor 4 Vehicle seat 4B Seat back 6, 6A Seat reclining mechanism 10S1, 10S2 Side frame 11 Center console box (load support member)
12 Load transmission member 12a End portion in the vehicle direction 12b End portion in the vehicle direction 14, 14A Side frame reinforcing member (reinforcing portion, reinforcing structure)
15 Load transmission piece (load input part)
16 Door armrest M Electric motor (part of seat reclining mechanism)

Claims (7)

A pair of side frames facing each other on both sides in the vehicle width direction within the seat back of the vehicle seat;
A load transmission member installed across the vehicle width direction between the pair of side frames in an inclined posture with the vehicle width direction outer side end on the upper side and the vehicle width direction inner side end on the lower side ;
In a side impact load support structure of a vehicle body, comprising a load support member provided at a vehicle width direction center portion on a vehicle body floor and supporting a side impact load input to the load transmission member,
A connecting portion between the load transmitting member and the side frame on the outer side in the vehicle width direction is provided with a reinforcing portion that suppresses deformation of the side frame due to a side collision load ,
A side impact load support structure for a vehicle body, wherein the reinforcing portion is disposed on the inner side in the vehicle width direction of the side frame on the outer side in the vehicle width direction and on the front side of the load transmission member . A load input portion projecting outward from the side frame in the vehicle width direction is provided at an end portion of the load transmitting member on the vehicle width direction outer side so as to correspond to the vehicle width direction outer side of the reinforcing portion. Item 2. The vehicle body side impact load support structure according to Item 1 . The side impact load support structure for a vehicle body according to claim 1 or 2 , wherein the load transmission member is linearly formed at least between a pair of side frames. The side impact load support structure for a vehicle body according to any one of claims 1 to 3 , wherein an end portion of the load transmission member on the outer side in the vehicle width direction is disposed to face the door armrest. The side impact load support structure for a vehicle body according to any one of claims 1 to 4 , wherein an end of the load transmission member on the inner side in the vehicle width direction is disposed at a position corresponding to a seat reclining mechanism. .   The side impact load support structure for a vehicle body according to any one of claims 1 to 5, wherein the reinforcing portion is formed in a hollow shape, and a part of the seat reclining mechanism is accommodated in the reinforcing portion. When a side impact load is input from the side of the vehicle body, the vehicle is tilted between the pair of side frames in the seat back of the vehicle seat with the outer end in the vehicle width direction facing up and the inner end in the vehicle width direction facing down. The load transmission member installed across the width direction is brought into contact with a load support member provided at the center in the vehicle width direction on the vehicle body floor, and the side impact load is transmitted to the load support member via the load transmission member. In the side impact load support method of the vehicle body to be supported,
A reinforcing portion is provided at a connection portion between the load transmitting member and the side frame on the outer side in the vehicle width direction, and the reinforcing portion is provided on the inner side in the vehicle width direction of the side frame on the outer side in the vehicle width direction and on the front side of the load transmitting member. disposed to the vehicle body of the side impact load supporting method is characterized in that so as to prevent the said side frame is deformed by side impact load.

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