JP5182478B2 - Car body side impact load support structure and side impact load support method - Google Patents

Car body side impact load support structure and side impact load support method Download PDF

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JP5182478B2
JP5182478B2 JP2007266500A JP2007266500A JP5182478B2 JP 5182478 B2 JP5182478 B2 JP 5182478B2 JP 2007266500 A JP2007266500 A JP 2007266500A JP 2007266500 A JP2007266500 A JP 2007266500A JP 5182478 B2 JP5182478 B2 JP 5182478B2
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vehicle
leg portion
impact load
side
vehicle body
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JP2009096216A (en
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道裕 桂木
勇一 沖
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日産自動車株式会社
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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 load support member (console box) provided at the center in the vehicle width direction through a load transmission member provided in the vehicle seat across the vehicle width direction is applied to the side impact load (collision load) input to the side surface of the vehicle body. ) And 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 structure described above, the load transmission member provided on the seat contacts the load support member at the time of a side collision, and the load is transmitted from the load transmission member to the load support member. However, if the load transmitting member escapes upward for some unwilling reason in the process, the effect may be reduced.

  Therefore, 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 reliably support a side impact load by a load support member.

The present invention provides a vehicle body side collision in which a side impact load transmitted to a seat back frame of a vehicle seat via a load transmission member provided in the vehicle width direction is supported by a load support member on the vehicle floor in the vehicle width direction. In the load support structure, when a side collision load is input, seat back tilting means is provided to tilt the seat back outwardly by deforming the inner and outer legs that support the vehicle seat, thereby tilting the seat back. The means is characterized in that the amount of height reduction accompanying deformation of the outer leg is larger than the amount of height reduction accompanying deformation of the inner leg .

According to the present invention, when a side impact load is input, the seat back is tilted outward by the seat back tilting means, so that the load transmitting member provided on the seat back is prevented from escaping upward. The load supporting effect by the load supporting member can be obtained more reliably.
Further, according to the present invention, the seat back tilting means is configured to tilt the seat back by deforming the leg portion. Therefore, the above effect can be obtained by tilting the seat back while substantially maintaining the overall shape of the seat back and securing the presence space for the occupant. Further, a simpler configuration can be obtained as compared with a case where other parts such as the seat back itself are deformed.
Further, according to the present invention, the seat back tilting means is configured such that the height reduction amount accompanying the deformation of the outer leg portion is larger than the height reduction amount accompanying the deformation of the inner leg portion. For this reason, there is an effect that it becomes easy to set a more appropriate tilting posture of the seat back as a difference in deformation amount between the outer leg portion and the inner leg portion.

  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 rear perspective view showing a part of the vehicle body provided with the side collision load support structure according to the present embodiment with the seat back frame exposed, and FIG. 2 shows the side collision load support structure. FIG. 3 is a vertical cross-sectional view of a vehicle body provided at a position where a vehicle seat is arranged, and FIG. 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 to which the vehicle body side impact load support structure according to the present embodiment is applied, a floor tunnel 4 having an inverted U-shaped cross section is provided in the vehicle longitudinal direction at the vehicle width direction center portion of the vehicle body floor 3 as shown in FIG. It is extended along. A pair of vehicle seats 1 are installed on the vehicle body floor 3 on both the left and right sides of the floor tunnel 4. A center console box 2 is attached to the upper side of the floor tunnel 4. In each figure, only the vehicle seat 1 on the right side is shown, but the vehicle seat 1 having a different shape is also installed on the left side.

  Side sills 5 having a closed cross-sectional structure extend in the vehicle front-rear direction at both ends of the vehicle body floor 3 in the vehicle width direction. A cross member 6 is installed between the pair of left and right side sills 5, and the vehicle body floor 3 is joined to the cross member 6. The side sill 5 serves as a lower edge of the side opening, and a side door (front door) 7 is provided to close the side opening so as to be opened and closed. In the present embodiment, the side door 7 serves as a vehicle body side portion to which a side collision load is input.

  The side door 7 includes a door outer panel 7a and a door inner panel 7b, and a door trim 7c is mounted on the vehicle interior side of the door inner panel 7b. The door trim 7c is provided with a door armrest 7R so as to protrude into the vehicle interior at a position corresponding to the height of the occupant's elbow.

  Further, as shown in FIG. 2, the vehicle seat 1 has a seat cushion 1C, a seat back 1B, and a headrest 1H. On the other hand, as shown in FIGS. 1 to 3, a slide rail 8 </ b> R extending along the vehicle front-rear direction is fixed to the vehicle body floor 3, and the leg portion 8 </ b> L of the vehicle seat 1 can slide on the slide rail 8 </ b> R. (It can slide back and forth). That is, the seat slide device 8 is configured by the slide rail 8R and the leg portion 8L. Further, the seat cushion 1C and the seat back 1B are connected to each other via a seat reclining mechanism 11L, 11R so as to be tiltable. In addition, the seat pan 13 (see FIG. 2) that is the bottom skeleton of the seat cushion 1C is also supported by the leg portion 8L.

  The seat back frame 10 constituting the skeleton of the seat back 1B is generally formed in a substantially rectangular shape by a pair of side frames 10S1 and 10S2, an upper frame 10U, and a lower frame 10L that are opposed to both sides in the vehicle width direction.

  The side frames 10S1, 10S2, the upper frame 10U, and the lower frame 10L are formed by bending a hollow pipe as a continuous single part. Further, the side frames 10S1 and 10S2 are covered with reinforcing plates 10R1 and 10R2 each having a substantially U-shaped cross section except for their upper ends. One side frame 10S1 is disposed on the outer side in the vehicle width direction, and the other side frame 10S2 is disposed on the inner side in the vehicle width direction.

  Seat reclining mechanisms 11L and 11R are provided at the lower ends of the side frames 10S1 and 10S2. In these seat reclining mechanisms 11L and 11R, the arms 11La and 11Ra are connected to the upper part of the rear end portion of the leg portion 8L of the seat slide device 8 via bolts 12 and nuts 12a.

  In the seat back frame 10, a seat reinforcing member 14 is provided between the pair of left and right side frames 10S1 and 10S2. The seat reinforcing member 14 is inclined in such a posture that the outer end portion 14a on the outer side in the vehicle width direction is on the upper side and the inner end portion 14b on the inner side in the vehicle width direction is on the lower side. At this time, the outer end portion 14 a of the seat reinforcing member 14 faces the door outer panel 7 a of the side door 7 as the side surface portion of the vehicle body, and the inner end portion 14 b faces the center console box 2.

  The side frame 10S1 on the outer side in the vehicle width direction is provided with a load transmission piece 15 that protrudes toward the outer side in the vehicle width direction at substantially the same height as the outer end portion 14a of the seat reinforcing member 14. The load transmission piece 15 is disposed to face the upper end portion of the door armrest 7R.

  With such a configuration, a side collision load F (see FIG. 3) input to the door outer panel 7a of the side door 7 serving as a side surface of the vehicle body is deformed at the time of a side collision while the deformation of each part in the vehicle is performed. A load transmission path that is transmitted to the center console box 2 through the seat reinforcing member 14 and the seat reclining mechanism 11L on the inner side in the vehicle width direction is formed. That is, in the present embodiment, the load transmitting piece 15 and the sheet reinforcing member 14 correspond to the load transmitting member (strictly, members interposed therebetween (including part of the side frames 10S1, 10S2 and the like) are also included). The center console box 2 corresponds to a load support member. Then, the side impact load F input to the center console box 2 is distributed from the adjacent vehicle seat or floor tunnel 4 (not shown) to the vehicle body floor 3.

  Inside the center console box 2, there is provided a container-like console load transmission member 2a coupled to the upper surface of the floor tunnel 4 via fastening members 16 such as bolts and nuts. The outer side of the console load transmitting member 2a is covered with a skin material 2b, and its upper end opening is closed with a lid 2c so as to be opened and closed. The console load transmission member 2a has a height and a longitudinal length at which the seat reclining mechanism 11L inside the vehicle can come into contact when the seat back 1B moves back and forth by the seat slide device 8 and the seat reclining mechanisms 11L and 11R. It is formed with.

  The side impact load F input from the seat reinforcing member 14 is substantially supported by the console load transmitting member 2a. At this time, the yield strength obtained by the rigidity and strength of the console load transmitting member 2a is set to be smaller than that of the sheet reinforcing member 14. Therefore, when the side impact load F is input to the side surface of the center console box 2 via the seat reinforcing member 14, the side impact load F is deformed while being supported by the console load transmitting member 2a. Is prevented from being deformed.

  Here, in the present embodiment, when the side impact load F is input to the vehicle seat 1, the seat back tilting means 20 is provided that tilts the seat back 1B outward of the vehicle body. In the present embodiment, the seat back tilting means 20 is configured to tilt the seat back 1B by deforming the leg portion 8L that attaches the vehicle seat 1 to the vehicle body floor 3. Specifically, a concave portion 21 that opens to the outside in the vehicle width direction is formed as a fragile portion in the intermediate portion in the height direction of the outer leg portion 8Lo. The concave portion 21 is formed as a concave groove portion continuous between the front and rear ends of the outer leg portion 8Lo. In addition, the recessed part 21 can also be called the convex part (projection part) which protrudes in the vehicle width direction inner side.

  In such a configuration, at the time of a side collision, as shown in FIG. 3, the side impact load F is input to the load transmission piece 15 via the door trim 7c while crushing the door outer panel 7a and the door inner panel 7b. Further, the side impact load F is transmitted from the seat reinforcing member 14 to the seat reclining mechanism 11L while moving the vehicle seat 1 to the center of the vehicle compartment as a whole, and is received by the center console box 2 to receive the vehicle body floor 3 To be distributed.

  At this time, the upper end of the outer leg 8Lo receives a load from the seat back 1B toward the inner side in the vehicle width direction due to the side impact load F, while the lower end of the outer leg 8Lo is fixed to the vehicle body floor 3. The slide rail 8R is kept engaged. Therefore, a bending moment that protrudes inward in the vehicle width direction acts on the outer leg portion 8Lo, and the outer leg portion 8Lo bends starting from the concave portion 21 where stress is concentrated (that is, in the present embodiment). Then, the concave portion 21 corresponds to the fragile portion.) On the other hand, since the concave portion 21 is not set in the inner leg portion 8Li, the inner leg portion 8Li is slightly tilted without being bent halfway. For this reason, in the present embodiment, a state is obtained in which the height reduction amount xo of the outer leg portion 8Lo is larger than the height reduction amount xi of the inner leg portion 8Li, and therefore, the outer leg portion 8Lo and the inner leg portion 8Li. The seat back 1B to which is connected is inclined in a posture in which the outer side in the vehicle width direction is down.

  As described above, in the present embodiment, the seat back tilting means 20 is provided that tilts the seat back 1B outward from the vehicle body when the side impact load F is input to the vehicle seat 1. For this reason, it is suppressed that the seat reinforcement member 14 as a load transmission member attached to the seat back 1B escapes upward, and a load transmission path can be more reliably ensured. In addition, the upper part of the inclined seat back 1B interferes with the side door 7 entering the vehicle interior to suppress the entry of the side door 7, and it is easy to secure the passenger existing space.

  In the present embodiment, the seat back tilting means 20 is configured to tilt the seat back 1B by deforming the leg portion 8L. For this reason, the above-mentioned effect can be obtained by tilting the seat back 1B while substantially maintaining the overall shape (frame shape) of the seat back 1B and securing the presence space of the occupant. Further, a simpler configuration can be obtained as compared with a case where other parts such as the seat back itself are deformed.

  In the present embodiment, the seat back tilting means 20 is configured such that the height reduction amount xo accompanying the deformation of the outer leg portion 8Lo is larger than the height reduction amount xi accompanying the deformation of the inner leg portion 8Li. For this reason, there exists an effect that it becomes easy to set the more suitable inclination attitude | position of the seat back 1B as a difference of the deformation amount of the outer side leg part 8Lo and the inner side leg part 8Li.

  Further, in the present embodiment, a recess 21 is formed in the intermediate portion in the height direction of the outer leg 8Lo, and as shown in FIG. 3, the outer leg 8Lo is protruded inward in the vehicle width direction starting from the recess 21. It was made to be bent in a V shape. For this reason, it becomes easy to set the deformation | transformation state of the outer side leg part 8Lo, and robustness can be improved about the inclination posture of the seat back 1B accompanying a side collision.

  Further, in the present embodiment, the concave portion 21 serving as the weakened portion that is the starting point of deformation is provided only on the outer leg 8Lo and not on the inner leg 8Li. For this reason, a state in which the outer leg 8Lo is deformed more than the inner leg 8Li and the height reduction amount xo of the outer leg 8Lo is larger than the height reduction amount xi of the inner leg 8Li by a relatively simple configuration. It can be obtained more reliably.

  Moreover, in this embodiment, the recessed part 21 open | released to a vehicle width direction outer side was formed in the outer side leg part 8Lo as a weak part. Such a recess 21 can be obtained relatively easily only by recessing the outer leg portion 8Lo on the inner side in the vehicle width direction. Therefore, the seat back 1B is tilted outward in the vehicle width direction while suppressing an increase in manufacturing cost. The above effects can be obtained.

  (Second Embodiment) FIGS. 4 to 6 show a side impact load support structure and a side impact load support method for a vehicle body according to a second embodiment of the present invention. 4 is a rear perspective view showing a part of the vehicle body provided with the side impact load support structure according to the present embodiment with the seat back frame exposed, and FIG. 5 is a side impact load support structure. FIG. 6 is a vertical cross-sectional view of the vehicle body provided at a position where the vehicle seat is arranged, and FIG. The side impact load support structure according to the present embodiment is the same as the side impact load support structure according to the first embodiment except for the outer leg 8Lo. Therefore, in the following, common constituent elements are given common reference numerals, and redundant description is omitted. Also in this embodiment, in each drawing, FR indicates the front side of the vehicle, WO indicates the outer side in the vehicle width direction, and UP indicates the upper side.

  In the present embodiment, the outer leg 8Lo constituting the seat back tilting means 20 is tilted in advance in such a direction that the upper part is inward in the vehicle width direction and the lower part is outward in the vehicle width direction (relative to the surface of the vehicle body floor 3). Tilt angle: θ). Similarly to the first embodiment, the inner leg portion 8Li is erected in a substantially vertical direction.

  At the time of a side impact, both the inner leg portion 8Li and the outer leg portion 8Lo are tilted inward in the vehicle width direction as the seat back 1B is displaced inward in the vehicle width direction. At this time, since the inner leg portion 8Li is erected substantially vertically, the displacement direction of the upper end portion is substantially horizontal, but the outer leg portion 8Lo is tilted inward in the vehicle width direction, so The displacement direction of the part is obliquely downward. Therefore, the downward displacement amount of the outer leg 8Lo is larger than that of the inner leg 8Li, and as a result, the seat back 1B can be tilted outward.

  In other words, the seat back tilting means 20 including the outer leg 8Lo tilted inward in the vehicle width direction can tilt the seat back 1B outward in the vehicle width direction even in the case of a side collision. Therefore, as in the first embodiment, the seat reinforcing member 14 provided on the tilting seat back 1B is prevented from escaping upward, and the load transmission path can be more reliably ensured. In addition, the upper part of the inclined seat back 1B interferes with the side door 7 entering the vehicle interior to suppress the entry of the side door 7, and it is easy to secure the passenger existing space.

  Further, in the present embodiment, the seat back tilting means 20 has an outer leg portion 8Lo that is inclined in advance so that the upper portion thereof is inward in the vehicle width direction. For this reason, the outer leg portion 8Lo can be tilted by the load inward in the vehicle width direction applied from the seat back 1B. Since the seat back tilting means 20 according to the present embodiment can be obtained relatively easily only by inclining the outer leg 8Lo in advance, the seat back 1B is mounted on the vehicle while suppressing an increase in manufacturing cost. The above-mentioned effect can be obtained by tilting outward in the width direction.

  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, the seat back tilting means can be configured to bend or tilt a part of the vehicle seat in a predetermined direction when a load is applied during a side collision. Therefore, in addition to the configuration disclosed in the above-described embodiment, for example, a bent portion in which the leg portion of the vehicle seat is bent in a convex shape (V shape) inward in the vehicle width direction can be provided as the fragile portion. . Further, in order to promote bending at the bent portion, the bending rigidity can be lowered by reducing the thickness of the general portion. Further, the seat back tilting means can be provided in addition to the legs. Further, a member other than the center console box can be used as the load support member.

  In the above embodiment, the configuration in which the outer leg portion is mainly deformed is exemplified. However, if the height reduction amount of the inner leg portion is smaller than the height reduction amount of the outer leg portion, the inner leg portion is also inclined in advance. It can be left or bent. In the example in which the inner leg is inclined in advance, the inclination angle of the inner leg with respect to the vertical direction is made smaller than the inclination angle of the outer leg with respect to the vertical direction. Further, in the example in which the inner leg portion is bent in advance, the fragile portion for setting the bending position of the inner leg portion higher than the bending position of the outer leg portion or bending the outer leg portion in a substantially S-shaped crank shape ( It is possible to set a recess (recess) and a weak portion (recess) to be bent in a substantially V shape on the inner leg. Further, the inclination of the leg portion can be partial.

1 is a rear perspective view showing a part of a vehicle body provided with a side impact load support structure according to a first embodiment of the present invention with a seat back frame exposed. 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 figure which shows the state after the deformation | transformation by the side collision of FIG. It is a back perspective view which shows a part of vehicle body provided with the side collision load support structure concerning 2nd Embodiment of this invention in the state which the seat back frame exposed. 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. It is a figure which shows the state after the deformation | transformation by the side collision of FIG.

Explanation of symbols

1 Vehicle Seat 1B Seat Back 2 Center Console Box (Load Support Member)
3 Body floor 8 Seat slide device 8R Slide rail 8L Leg 8Li Inner leg 8Lo Outer leg 10 Seat back frame 11L Seat reclining mechanism (load transmission member)
14 Seat reinforcement member (load transmission member)
15 Load input piece (load transmission member)
20 Seat back tilting means 21 Recessed part (fragile part)
F side impact load xo, xi Height drop

Claims (7)

  1. A vehicle seat supported on the vehicle body floor by a leg portion having an inner leg portion provided on the inner side in the vehicle width direction and an outer leg portion provided on the outer side in the vehicle width direction, and the seat back frame of the vehicle seat across the vehicle width direction. A vehicle body side collision load support structure comprising: a load transmission member provided on the vehicle floor and a load support member provided on an inner side in the vehicle width direction of the vehicle body floor and receiving a side collision load input to the load transmission member;
    When a side impact load is input to the vehicle seat, a seat back tilting means for tilting the seat back outward of the vehicle body by deforming the inner leg portion and the outer leg portion is provided ,
    The vehicle body side impact load support structure, wherein the seat back tilting means is configured to make a height reduction amount accompanying the deformation of the outer leg portion larger than a height reduction amount accompanying the deformation of the inner leg portion. .
  2. The side impact load support of the vehicle body according to claim 1 , wherein the seat back tilting means includes a fragile portion that is formed at an intermediate portion in the vertical direction of the leg portion and serves as a starting point for bending the leg portion. Construction.
  3. Vehicle side impact load supporting structure according to claim 2, the front Symbol fragile portion, characterized in that provided only on the outer legs.
  4. The side impact load support structure for a vehicle body according to claim 2 or 3 , wherein a concave portion that opens outward in the vehicle width direction is formed in the leg portion as the fragile portion.
  5. The side impact load support structure for a vehicle body according to claim 1 , wherein the seat back tilting means has a leg portion whose upper portion is inclined in advance so that the upper portion is inward in the vehicle width direction.
  6. The side impact load support structure for a vehicle body according to claim 5 , wherein only the outer leg portion is inclined in advance so that the upper portion thereof is inward in the vehicle width direction.
  7. Vehicle seat is supported on the vehicle body floor by the outer leg of the inner leg and the vehicle width direction outer side in the vehicle width direction inner side, when the side impact load is inputted from the vehicle body side portion, car seat back of the vehicle seat A load transmission member provided across the width direction is brought into contact with a load support member provided at a vehicle width direction center portion on the vehicle body floor, and a side impact load is applied to the load support member via the load transmission member. In the side impact load support method of the vehicle body to be transmitted and supported,
    When a side impact load is input to the vehicle seat, the seat back is tilted outward from the vehicle body by deforming the inner leg portion and the outer leg portion ,
    Body, wherein said that the height reduction amount due to deformation of the outer legs was so that be greater than the height decrease caused by the deformation of the inner leg portion when tilting the seat back to the outside of the vehicle body Side impact load support method.
JP2007266500A 2007-10-12 2007-10-12 Car body side impact load support structure and side impact load support method Active JP5182478B2 (en)

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WO2010150449A1 (en) * 2009-06-24 2010-12-29 本田技研工業株式会社 Vehicle seat
WO2011017435A1 (en) * 2009-08-04 2011-02-10 Johnson Controls Technology Company Seat assembly having an impact load transfer structure
JP5464020B2 (en) * 2010-04-06 2014-04-09 トヨタ紡織株式会社 Seat height adjustment device for vehicle seats
WO2012005279A1 (en) * 2010-07-09 2012-01-12 テイ・エス テック株式会社 Vehicle seat
EP2591948A4 (en) 2010-07-09 2016-04-27 Ts Tech Co Ltd Vehicle seat
JP5805638B2 (en) * 2010-07-09 2015-11-04 テイ・エス テック株式会社 vehicle seat
WO2012005282A1 (en) 2010-07-09 2012-01-12 テイ・エス テック株式会社 Vehicle seat
JP2012166681A (en) * 2011-02-14 2012-09-06 Aisin Seiki Co Ltd Seat holding structure for vehicle
JP6332112B2 (en) 2015-04-02 2018-05-30 トヨタ自動車株式会社 Side impact load transmission structure
JP6353566B2 (en) * 2017-02-08 2018-07-04 テイ・エス テック株式会社 Vehicle seat

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JP2617077B2 (en) * 1993-03-03 1997-06-04 日産自動車株式会社 Car seat
JP2001270356A (en) * 2000-03-24 2001-10-02 Araco Corp Light alloy seat back frame
JP4019744B2 (en) * 2002-03-01 2007-12-12 三菱自動車工業株式会社 Sheet
JP4380565B2 (en) * 2005-03-10 2009-12-09 トヨタ自動車株式会社 Side impact load transmission structure

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