JP5256652B2 - 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 impact load (collision load) input to the side surface of the vehicle body is transmitted to a floor tunnel via a load transmission member provided in the vehicle width direction in the vehicle seat, and the side impact load is transmitted through the floor tunnel. A side impact load support structure for a vehicle body to be supported 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 2001-105947 A

  In the above-described conventional structure, the load transmission member provided on the seat comes into contact with the floor tunnel from a remote position at the time of a side collision, and the load is transmitted from the load transmission member to the floor tunnel. . However, if the contact state between the load transmission member and the floor tunnel is eliminated 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 impact load in which a load transmission member provided in the vehicle width direction on a seat back of a vehicle seat is brought into contact with and supported by a load support member provided in a vehicle width direction center portion on the vehicle body floor. In the support structure, a movement restricting mechanism is provided on the side wall of the load supporting member to restrict the movement of the abutting load transmitting member on the inner side in the vehicle width direction , and the load restricting mechanism is in contact with the load supporting member. This is a locking structure for locking the inner end of the transmission member in the vehicle width direction, and this locking structure is pushed by the end of the load transmission member on the inner side in the vehicle width direction, with the side wall of the load support member recessed. The most important feature is that it is a recessed portion that is recessed .

  According to the present invention, since the movement restriction mechanism is provided, it is easy to maintain the state in which the end of the load transmission member on the inner side in the vehicle width direction and the load support member are in contact with each other, and the seat is seated on the vehicle seat. It is possible to secure the living space for the occupant to perform.

  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 9 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, 4 are installed on the vehicle body floor 2 on the left and right sides of the floor tunnel 3.

  The vehicle seat 4 includes a seat cushion 4C, a seat back 4B, and a headrest 4H. A rail 4a extending along the vehicle front-rear direction is fixed to the vehicle body floor 2, and a leg portion 4b of the vehicle seat 4 is slidably attached to the rail 4a. That is, the rail 4a and the leg 4b constitute a seat slide device 4S. Further, the seat cushion 4C and the seat back 4B are connected to each other via a seat reclining mechanism 4R so as to be tiltable.

  Side sills 5 having a closed cross-sectional structure extend in the vehicle front-rear direction at both ends of the vehicle body floor 2 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 2 is joined to the cross member 6. The side sill 5 serves as a lower edge of the side opening, and a side door 7 is provided to close the side opening so as to be opened and closed. In the present embodiment, the outer side surface 7a of the side door 7 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 10Sa and 10Sb extending in the vertical direction with at least the lower ends of 10U joined, and a lower frame 10L constructed between the lower ends of the side frames 10Sa and 10Sb are provided.

  Furthermore, in this embodiment, between these side frames 10Sa and 10Sb, the inclination which makes the edge part (outer edge part) 11a of the vehicle width direction outer side up and the edge part (inner edge part) 11b of the vehicle width direction inner side is down is carried out. In the posture, the sheet reinforcing member 11A is installed. Here, as shown in FIG. 1, the outer end portion 11a of the seat reinforcing member 11A faces the outer surface 7a of the side door 7 as a side surface portion of the vehicle body, and the inner end portion 11b is a center console as a load support member. It faces the side wall 12S of the box 12.

  The side frame 10Sa on the outer side in the vehicle width direction is provided with a load transmission piece 11E1 that protrudes toward the outer side in the vehicle width direction at substantially the same height as the outer end portion 11a of the seat reinforcing member 11A. The load transmission piece 11E1 is disposed to face the upper end portion of the door armrest 7b. On the other hand, the side frame 10Sb on the inner side in the vehicle width direction is provided with a load transmission piece 11E2 that protrudes toward the inner side in the vehicle width direction at the same height as the inner end portion 11b of the seat reinforcing member 11A. As will be described in detail later, the side impact load F input to the outer side surface 7a of the side door 7 serving as the side surface of the vehicle body at the time of a side collision is a load transmission piece. A load transmission path that is transmitted to the center console box 12 through 11E1, the sheet reinforcing member 11A, and the load transmission piece 11E2 is formed. That is, in this embodiment, the load transmission piece 11E1, the sheet reinforcing member 11A, and the load transmission piece 11E2 correspond to the load transmission member 11 (strictly speaking, members interposed between them (one of the side frames 10Sa and 10Sb). The center console box 12 corresponds to a load supporting member.

  As shown in FIG. 2, the center console box 12 includes a box-shaped outer frame trim 13 installed on the upper surface of the floor tunnel 3, a reinforcing frame 14 accommodated in the outer frame trim 13, and the reinforcing frame 14. A pocket 15 that is inserted into the outer frame trim 13 on the upper side of the outer frame trim 13 to be a small item case and a lid trim 16 that closes the upper end opening of the outer frame trim 13 so as to be freely opened and closed.

  3 to 7 are views showing a center console box. 3 is a perspective view of a reinforcing frame in the center console box, FIG. 4 is an exploded perspective view in which the reinforcing frame of the center console box is disassembled into a frame upper and a frame lower, and FIG. 5 is an exploded perspective view of the frame lower. FIG. 6 is an exploded perspective view of the frame upper.

  3 and 4, the reinforcing frame 14 includes a rectangular frame-shaped frame lower 14L disposed at the bottom of the outer frame trim 13, and a container-shaped frame upper 14U installed on the upper side of the frame lower 14L. And composed of

  As shown in FIG. 5, the frame lower 14L is formed by joining the left frame outer 14L1a and the left frame inner 14L1b and joining the left frame outer 14L2a and the right frame inner 14L2b. A light frame 14L2. Further, a front cross frame 14L3 for connecting the front end portions of the left frame outer 14L1a and the right frame outer 14L2a and a rear cross frame 14L4 for connecting the rear end portions are provided.

  Further, as shown in FIG. 6, the frame upper 14U includes a main panel 14U1 that is bent in a U shape with the front side opened in plan view, and a front panel that connects the front side open side ends of the main panel 14U1. 14U2, and a step-shaped center panel 14U3 serving as a bottom wall of a main panel 14U1 and a front panel 14U2 coupled in a rectangular shape.

  7 is a sectional view taken along the line VII-VII in FIG. 3 (including the floor panel side). As shown in FIG. 7, for the left frame 14L1 of the frame lower 14L, the lower end of the left frame inner 14L1b is welded to the upper surface of the floor tunnel 3 at the welding point W1, and the lower end of the left frame outer 14L1a is the floor. The side surface of the tunnel 3 is welded at a welding point W2.

  And the lower end part of the side wall 14U1S of the main panel 14U1 is couple | bonded with the upper end part of each of the left flame | frame inner 14L1b and the left flame | frame outer 14L1a with the volt | bolt 17 and the nut 17a.

  FIG. 8 is an explanatory diagram showing the deformation of the left side portion of the vehicle body when viewed from the front in the same vertical cross section as FIG. 1, in the order of (a) and (b). FIG. 9 is an enlarged view of a portion B in FIG. In the above configuration, when a side impact load F is input from the outer side surface 7a of the side door 7 as the vehicle body side surface during a side collision as shown in FIG. 8A, the side door 7 is deformed inward in the vehicle width direction. Then, the door armrest 7b comes into contact with the load transmitting piece 11E1. When the side collision further proceeds, as shown in FIG. 8B, the vehicle seat 4 moves inward in the vehicle width direction, and the load transmitting piece 11E2 comes into contact with the side wall 12S of the center console box 12. That is, the side impact load F input to the outer surface 7a is transmitted to the center console box 12 as the load support member via the load transmission piece 11E1, the sheet reinforcing member 11A, and the load transmission piece 11E2 as the load transmission member. , Will be supported. That is, at the time of a side collision, the load transmission member 11 supported by the center console box 12 is stretched in the vehicle width direction, and a living space for a passenger sitting on the vehicle seat 4 can be secured.

  Here, in the side impact load support structure of the vehicle body according to the present embodiment, as shown in FIG. 2 and the like, the center console box 12 has an end portion on the inner side in the vehicle width direction of the load transmission member 11, that is, load transmission. A movement restricting mechanism 20 is provided that restricts the movement of the load transmitting piece 11E2 when the piece 11E2 contacts.

  In the present embodiment, as the movement restricting mechanism 20, as shown in FIGS. 6 and 9, etc., the side wall 14U1S of the frame upper 14U of the reinforcing frame 14 is recessed inward in the vehicle width direction to form a recessed portion 21. The recessed portion 21 locks the load transmitting piece 11E2 and restricts its movement. That is, the recessed portion 21 corresponds to a locking structure. Since the concave portion 21 forms a step along the vertical direction with the upper portion protruding outward in the vehicle width direction, the upward movement of the load transmitting piece 11E2 is restricted.

  When the center console box 12 supports the load transmitting piece 11E2, the outer frame trim 13 is a flexible member, so that the inner reinforcing frame 14 becomes a substantial load supporting portion. For this reason, the recessed portion 21 (movement restriction mechanism 20) is provided on the side wall 14U1S of the frame upper 14U of the reinforcing frame 14.

  Then, as shown in FIG. 9, when the load transmission piece 11E2 is pressed against the recessed portion 21 while deforming the outer frame trim 13 formed of a flexible member at the time of a side collision, Stopped. Therefore, the side impact load F is transmitted from the load transmission member 11 (load transmission piece 11E2) to the floor tunnel 3 while maintaining the state where the load transmission piece 11E2 and the side wall 14U1S are in contact with each other, and is transmitted to the vehicle body floor 2. Distributed.

  As described above, according to the present embodiment, when the load transmission piece 11E2 as the end portion on the inner side in the vehicle width direction of the load transmission member 11 contacts the center console box 12 as the load support member, the movement is performed. A movement restriction mechanism 20 for restriction is provided. Therefore, after the load transmission piece 11E2 comes into contact with the center console box 12 at the time of a side collision, the contact state, that is, the state in which the load transmission member 11 is supported by the center console box 12 is easily maintained. The living space for the occupant seated on the seat 4 can be ensured more reliably.

  Moreover, according to this embodiment, since the movement control mechanism 20 was formed as the recessed part 21 of the side wall 14U1S, the said movement control mechanism 20 can be obtained as a comparatively simple structure. Since the recessed portion 21 has a locking structure for locking the load transmission piece 11E2, the movement of the load transmission piece 11E2 in the engagement direction (mainly upward in this embodiment) is more reliably regulated. be able to.

  Moreover, according to this embodiment, since the center console box 12 is used as a load support member, an increase in cost can be suppressed as much as an existing structure can be used.

  The side impact load support structure of the vehicle body according to the present embodiment has a symmetrical shape with respect to the center in the vehicle width direction, and it goes without saying that the same effect can be obtained for the left and right vehicle seats 4 and 4. .

  (Second Embodiment) FIG. 10 shows a second embodiment of the present invention. FIG. 10 is a cross-sectional view of the center console box included in the vehicle body side impact load support structure according to the present embodiment at the same position as FIG. 9. In addition, the side collision load support structure concerning this embodiment is equipped with the component similar to the side collision load support structure concerning the said 1st Embodiment. Therefore, the same constituent elements are given common reference numerals, and redundant description is omitted.

  Also in the present embodiment, as will be apparent when comparing FIG. 10 with FIG. 9, a recessed portion recessed inward in the vehicle width direction on the side wall 14U1S of the frame upper 14U of the reinforcing frame 14A included in the center console box 12A. 21A is formed.

  However, in this embodiment, the recessed portion 21A is formed as the fragile portion 22 that is thinner (thickness = t1) than the thickness t of the general portion on the upper side.

  Therefore, as shown in FIGS. 8A and 8B, when the load transmitting piece 11E2 comes into contact with the side wall 14U1S, the recessed portion 21A is recessed inward in the vehicle width direction. At this time, since the recessed portion 21 </ b> A is thinned as the fragile portion 22, the dent is promoted as compared with the case where the thinned portion 21 </ b> A is not thinned.

  According to the present embodiment described above, the side wall 14U1S is pushed by the load transmission piece 11E2 and is recessed inward in the vehicle width direction, so that the load transmission piece 11E2 (load transmission member 11) and the side wall 14U1S (center console box 12) are engaged. Since the joint section becomes longer in the vehicle width direction and the locking state becomes stronger, the state where the load transmission member 11 is supported by the center console box 12 is more easily maintained. Therefore, the occupant's living space seated on the vehicle seat 4 can be more reliably ensured.

  Further, according to the present embodiment, since the recessed portion 21A is formed as the weakened portion 22 which is thinner than the general portion, the recess 21A is promoted to be recessed by the load transmitting piece 11E2, and the load transmitting piece 11E2 and the side wall 14U1S are promoted. The engagement section tends to become longer in the vehicle width direction, and the state where the load transmission member 11 is supported by the center console box 12 is more reliably maintained, so that the passenger sitting on the vehicle seat 4 Living space can be secured more reliably.

  (Third Embodiment) FIGS. 11 to 14 show a third embodiment of the present invention. 11 is a perspective view of the reinforcing frame in the center console box, and FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. Note that the side impact load support structure for a vehicle body according to this embodiment includes the same components as the side impact load support structure for a vehicle body according to the first embodiment or the second embodiment. Therefore, the same constituent elements are given common reference numerals, and redundant description is omitted.

  The reinforcing frame 14 according to the present embodiment is the same as that of the first embodiment. However, in the present embodiment, when a side collision is detected or predicted by a side collision sensor (not shown), the reaction force is projected outward from the center console box 12B in the vehicle width direction and applied to the load transmission member 11 toward the outer side in the vehicle width direction. Is provided with a reaction force imparting mechanism 23 that imparts

  The reaction force applying mechanism 23 has an airbag 23a attached to the side wall 14U1S of the reinforcing frame 14, and when a side collision is predicted or detected by a side collision sensor (not shown), the gas supply tube 23c is connected from the inflator 23b. Thus, gas is supplied to the airbag 23a, and the airbag 23a is inflated and deployed at least outward in the vehicle width direction. The airbag 23 a is attached to the bottom of the recessed portion 21 in a folded state, and the outside thereof is covered with the outer frame trim 13.

  FIG. 13 is a diagram showing a state where the airbag of FIG. 12 is deployed, and FIG. 14 is a graph schematically showing a change with time of the reaction force acting on the load transmitting member. In FIG. 14, the horizontal axis represents time, the vertical axis represents reaction force, α represents a case where no airbag is provided, and β represents a case where an airbag is provided (this embodiment).

  As shown in FIG. 13, when the airbag 23a is inflated and deployed, the outer frame trim 13 bulges and deforms toward the outer side in the vehicle width direction, and the end of the load transmitting member 11 in the vehicle width direction (the load transmitting piece 11E2). Thus, the load transmission piece 11E2 is supported by the airbag 23a and the outer frame trim 13. Therefore, as shown in FIG. 14, the load transmission member 11 is supported at a timing earlier by Δt than in the case where the airbag 23a is not provided. In this case, the outer frame trim 13 and the airbag 23a are pushed in from the load transmitting piece 11E2 and are slightly recessed. Therefore, the outer frame trim 13 and the airbag 23a correspond to the movement restriction mechanism in this embodiment.

  Further, as shown in FIG. 13, as compared with the case where the airbag 23a is not provided, a wider space for the occupant seated on the vehicle seat 4 by a length W corresponding to the inflation of the airbag 23a is secured. There is also an advantage of being able to. That is, according to this embodiment, a wider occupant living space can be obtained from an earlier stage.

  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.

  Further, the fragile portion only needs to promote deformation of the side wall of the load supporting member after the load transmitting member comes into contact with the load supporting member, and the side wall may be partially thinned, or a slit or A through hole or the like may be provided. Moreover, you may use things other than an airbag as a reaction force provision mechanism.

It is the vertical sectional view which crossed the vehicle body provided with the side impact load support structure concerning the embodiment of the present invention at the arrangement portion of the vehicle seat. It is a disassembled perspective view which shows a part of the side impact load support structure of the vehicle body concerning 1st Embodiment of this invention. It is a perspective view of the reinforcement frame contained in the side impact load support structure of the vehicle body concerning 1st Embodiment of this invention. It is the disassembled perspective view which decomposed | disassembled the reinforcement frame contained in the side collision load support structure of the vehicle body concerning 1st Embodiment of this invention into the frame upper and the frame lower. It is a disassembled perspective view of the frame lower contained in the side impact load support structure of the vehicle body concerning 1st Embodiment of this invention. It is a disassembled perspective view of the frame upper contained in the side collision load support structure of the vehicle body concerning 1st Embodiment of this invention. It is VII-VII sectional drawing of FIG. FIG. 5 is an explanatory diagram showing deformation of the left side portion of the vehicle body when viewed from the front in the same vertical cross section as FIG. 1 in the order of (a) and (b). It is an expanded sectional view of B section in Drawing 8 (b). It is sectional drawing in the position equivalent to FIG. 9 of the center console box of the side impact load support structure of the vehicle body concerning 2nd Embodiment of this invention. It is a perspective view of the reinforcement frame contained in the side impact load support structure of the vehicle body concerning 3rd Embodiment of this invention. It is XII-XII sectional drawing in FIG. It is a figure which shows the state which the airbag of FIG. 12 expand | deployed. It is a graph which shows typically a time-dependent change of reaction force which acts on a load transmission member of a side impact load support structure of a body concerning a 3rd embodiment of the present invention.

Explanation of symbols

2 Vehicle body floor 3 Floor tunnel 4 Vehicle seat 4B Seat back 7a Outer side surface (side surface of vehicle body)
11 Load transmission member 11E2 Load transmission piece (end of the load transmission member on the inner side in the vehicle width direction)
12, 12A, 12B Center console box (load support member)
14U1S side wall 20, 20A movement restricting mechanism 21, 21A recessed portion 22 fragile portion 23 reaction force applying mechanism

Claims (6)

A load support member provided in the vehicle width direction center portion on the vehicle body floor;
A load transmitting member provided on a seat back of a vehicle seat in the vehicle width direction, with an end portion on the outer side in the vehicle width direction facing the side surface portion of the vehicle body and an end portion on the inner side in the vehicle width direction facing the side wall of the load support member And comprising
In a side impact load support structure for a vehicle body that supports a side impact load input to the load transmission member from the side surface portion of the vehicle body by abutting an end portion in the vehicle width direction of the load transmission member against the load support member. ,
Provided on the load support member is a movement restricting mechanism that restricts movement of the abutting load transmitting member at the inner end in the vehicle width direction ,
The movement restricting mechanism is a locking structure that locks an end portion on the inner side in the vehicle width direction of the load transmitting member in contact with the load supporting member,
The side impact load support of the vehicle body , wherein the locking structure is a recessed portion that is recessed by being pushed by an end portion on the inner side in the vehicle width direction of the load transmitting member, wherein the side wall of the load supporting member is recessed. Construction. Vehicle side impact load support structure of claim 1, the side wall, characterized in that a weakened portion which facilitates the recessed pushed to the load transfer member. A load support member provided in the vehicle width direction center portion on the vehicle body floor;
A load transmitting member provided on a seat back of a vehicle seat in the vehicle width direction, with an end portion on the outer side in the vehicle width direction facing the side surface portion of the vehicle body and an end portion on the inner side in the vehicle width direction facing the side wall of the load support member And comprising
In a side impact load support structure for a vehicle body that supports a side impact load input to the load transmission member from the side surface portion of the vehicle body by abutting an end portion in the vehicle width direction of the load transmission member against the load support member. ,
Provided on the load support member is a movement restricting mechanism that restricts movement of the abutting load transmitting member at the inner end in the vehicle width direction,
The movement restricting mechanism is a locking structure that locks an end portion on the inner side in the vehicle width direction of the load transmitting member in contact with the load supporting member,
The locking structure is a recessed portion in which a side wall of the load support member is recessed, and when a side collision is detected or predicted , the lock structure protrudes outward in the vehicle width direction from the load support member side and transmits the load. A side impact load support structure for a vehicle body comprising a reaction force applying mechanism for applying a reaction force to a member. The side impact load support structure for a vehicle body according to any one of claims 1 to 3 , wherein the load support member is a center console box. When a side impact load is input from the side surface of the vehicle body, it is provided across the vehicle width direction on the seat back of the vehicle seat, and the end on the outer side in the vehicle width direction faces the side surface of the vehicle body and the inner end in the vehicle width direction. The load transmitting member whose portion faces the side wall of the load supporting member is brought into contact with the load supporting member provided at the vehicle width direction center portion on the vehicle body floor, and the side collision load is applied to the load via the load transmitting member. In the side impact load support method of the vehicle body that transmits and supports the support member,
A concave portion that is depressed by being depressed by an end portion in the vehicle width direction of the load transmission member is recessed in the side wall of the load support member, and the load transmission member that is in contact with the load support member in the vehicle width direction inside The side end of the vehicle body is restricted by moving the end of the load transmitting member after contacting the load supporting member. Load support method. When a side impact load is input from the side surface of the vehicle body, it is provided across the vehicle width direction on the seat back of the vehicle seat, and the end on the outer side in the vehicle width direction faces the side surface of the vehicle body and the inner end in the vehicle width direction. The load transmitting member whose portion faces the side wall of the load supporting member is brought into contact with the load supporting member provided at the vehicle width direction center portion on the vehicle body floor, and the side collision load is applied to the load via the load transmitting member. In the side impact load support method of the vehicle body that transmits and supports the support member,
By locking the end of the load transmission member in the vehicle width direction of the load transmission member in contact with the load support member by the concave portion in which the side wall of the load support member is concave, the vehicle width direction inner side of the load transmission member Restricting the movement of the end portion of the load after contacting the load supporting member; and
When a side collision is detected or predicted, a reaction force is applied to the load transmission member by a reaction force application mechanism that protrudes outward in the vehicle width direction from the load support member side. Load support method.

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