JP2008290505A - Body lower structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a rear side door from entering into a cabin at a lateral collision without impairing occupant comfort. <P>SOLUTION: This body lower structure 100 having: an opening B opened and closed by the rear side door C and forming a rear doorway into the cabin; a floor 10 having an intermediate floor 11 forming a floor surface in a space where a second row seat E is arranged and a rear floor 12 forming a floor surface in a space in a rear cabin in the rear of the intermediate floor 11; and a linear slide rail 20 arranged from the intermediate floor 11 over the rear floor 12 and guiding the longitudinal movement of the second row seat E, includes a regulation member 30 which extends in a vehicle width direction, has an end 31a positioned in a position overlapping with the rear side door C in a vehicle side view, and regulates the displacement of the rear side door C into the cabin. The regulation member 30 extends in the vehicle width direction through a space formed of the intermediate floor 11, a step 11b and the slide rail 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle body structure.

  One way to improve vehicle safety is to prevent the side door from being deformed and entering the vehicle interior during a side collision. In particular, in the case of a wagon car or the like, the rear entrance / exit tends to be enlarged in order to improve the passengers' ability to get on and off, and it is highly necessary to prevent the rear side door from entering the vehicle interior at the time of a side collision.

Sliding doors are widely used as rear side doors for wagons, etc. However, sliding doors do not have hinges for opening and closing the doors and are required to be thinner than rotating doors. Therefore, the strength is inferior. For this reason, the safety | security improvement at the time of a side collision is requested | required further. However, it is desirable that safety can be improved while ensuring occupant comfort. As a vehicle body structure for improving safety at the time of a side collision, Patent Document 1 discloses a structure in which a bar whose end faces a pillar is provided at the lower part of a driver seat and a passenger seat.
JP 2006-248388 A

  However, in the technique disclosed in Patent Document 1, since the reinforcing portion by the bar is between the pillar and the tunnel portion, there is a possibility that the rear side door cannot be effectively prevented from entering the vehicle interior. Further, since the bar passes under the driver's seat and the passenger seat, the passengers in the rear seat cannot put their feet into the space under the driver's seat or the passenger seat, and the comfortability is deteriorated.

  Accordingly, an object of the present invention is to prevent the rear side door from entering the vehicle compartment at the time of a side collision without impairing the occupant's comfortability.

  According to the present invention, an opening that forms a rear entrance / exit into a vehicle interior that is opened and closed by a rear side door, and an intermediate that is disposed along the opening and forms a floor surface of a second row seating space. A floor portion and the intermediate floor portion are formed continuously through a step portion, and the floor surface height is higher than the intermediate floor portion, forming the floor surface of the rear compartment space behind the intermediate floor portion. A rear floor portion, and a linear portion that is disposed across the step portion from the intermediate floor portion to the rear floor portion and guides the movement of the second row seats in the front-rear direction. A vehicle body lower structure including a slide rail, extending in the vehicle width direction, an end portion of which is located at a position overlapping with the rear side door in a side view of the vehicle, and displace the rear side door into the vehicle interior. A regulating member for regulating, the regulation Member, underbody structure, characterized in that extending in the vehicle width direction through the intermediate floor portions and the space formed between the stepped portion by said sliding rail is provided.

  In the vehicle body lower structure according to the present invention, when the rear side door attempts to enter the vehicle interior at the time of a side collision of the vehicle, the end portion of the regulating member comes into contact with the rear side door and the displacement into the vehicle interior is regulated, The rear side door is prevented from entering the passenger compartment. The regulating member extends in the vehicle width direction through a space formed by the intermediate floor portion, the stepped portion, and the slide rail, and is not a dead space originally intended as a living space. So that it does not harm the occupant's habitability.

  In the present invention, the rear side door includes an inner panel, an outer panel, and a rod-shaped reinforcing member disposed between the inner panel and the outer panel, and the reinforcing member is provided at both ends thereof. It has a mounting portion with the inner panel and extends obliquely in the vehicle front-rear direction so that the vehicle rear side is lowered, and the end portion of the regulating member overlaps with the reinforcing member in a side view of the vehicle when the rear side door is closed. The structure arrange | positioned in the position may be sufficient.

  According to this configuration, at the time of a side collision of the vehicle, the end of the restricting member comes into contact with the reinforcing member that bears the load first, so that the rear side door can more effectively enter the vehicle interior. Can be prevented.

  In the present invention, the restricting member may be fixed to the slide rail. According to this configuration, the load borne by the restriction member can be distributed to the slide rail, and the rear side door can be more effectively prevented from entering the vehicle interior.

  Moreover, in this invention, it is good also as a structure further equipped with the fixing | fixed part which fixes the said slide rail to the said floor part, and the said fixing part fixes the said control member to the said floor part with the said slide rail. According to this configuration, the load borne by the restriction member can be distributed to the slide rail and the floor portion, and the rear side door can be more effectively prevented from entering the vehicle interior.

  In the present invention, the vehicle further includes a side frame that extends in the vehicle front-rear direction and supports the floor portion, and the restricting member is fixed to the floor portion at a position overlapping the side frame in a plan view of the vehicle. It is good also as composition which has. According to this configuration, the load borne by the restricting member can be distributed to the floor portion and the side frame, and the rear side door can be more effectively prevented from entering the vehicle interior.

  Moreover, in this invention, the said control member is good also as a structure extended linearly over the vehicle width direction whole region of the said intermediate | middle floor part. According to this configuration, the load borne by the restricting member can be distributed over a wide range, and the rear side door can be more effectively prevented from entering the vehicle interior.

  Moreover, in this invention, it is good also as a structure which provided the accommodating part which accommodates the edge part of the said limitation member in the said rear side door at the time of the said rear side door closing. According to this configuration, it is possible to more effectively prevent the rear side door from entering the vehicle interior by reliably bringing the end of the regulating member into contact with the rear side door at the time of a side collision of the vehicle.

  As described above, according to the present invention, it is possible to prevent the rear side door from entering the vehicle interior at the time of a side collision without harming the occupant's comfortability.

<First Embodiment>
FIG. 1 is an external perspective view of a vehicle A according to an embodiment of the present invention. The vehicle A includes an opening B that is provided on the side surface of the vehicle body and forms a rear entrance to the vehicle interior, and a rear side door C that is provided in the opening B. The rear side door C slides in the front-rear direction of the vehicle A along the slide rail D provided on the side surface of the vehicle body, and opens and closes the opening B. Such a sliding door is generally used in a vehicle type such as a wagon car that accommodates a large number of people. A second row seat E is arranged at a position close to the opening B, and a third row seat (not shown) is arranged in a rear compartment space of the second row seat E.

  The rear side door C is described as a slide door in the present embodiment, but the present invention is also applicable to a vehicle having a door in which the rear side door C is supported by a hinge. In the present embodiment, the third row seat is arranged in the rear compartment space, but the present invention can also be applied to a vehicle in which a cargo compartment is arranged in the rear compartment space.

  The vehicle body lower structure 100 is a vehicle body structure below the second row seat E and the third row seat, and guides the movement of the second row seat E in the vehicle longitudinal direction of the floor portion 10 that forms the floor surface of the passenger compartment. The slide rail part 20 and the control part 30 which controls the displacement to the vehicle interior of the rear side door C are provided.

  2 is a perspective view of the vehicle body lower structure 100 according to an embodiment, FIG. 3 is a plan view of the vehicle body lower structure 100, and FIG. 4 is a cross-sectional view taken along line AA of FIG.

  The floor portion 10 includes an intermediate floor portion 11 that forms the floor surface of the arrangement space for the second row seats E, and a rear floor portion 12 that forms the floor surface of the arrangement space for the third row seats F behind the intermediate floor portion 11. And comprising. The intermediate floor portion 11 is disposed along the opening B, and has a slope portion 11b that is inclined so as to become higher toward the rear of the vehicle A. A rear side frame 40 that is a reinforcing component extending in the front-rear direction of the vehicle A is disposed below the intermediate floor portion 11, and a fuel tank 60 is disposed therebetween. The rear floor portion 12 is continuously formed on the intermediate floor portion 11 via the slope portion 11 b, and the floor surface is higher than the intermediate floor portion 11.

  Accordingly, since the intermediate floor portion 11 has the slope portion 11b, a step is generated in the floor portion 10. Further, the intermediate floor portion 11 and the rear floor portion 12 have flange portions 11 a and 12 a at both ends in the vehicle width direction, and the flange portions 11 a and 12 a are joined to the inner panel 51 of the side sill 50.

  In addition, in this embodiment, although the slope part 11b was made into the shape which the intermediate floor part 11 has, it is good also as the shape which the back floor part 12 has, for example, dividing | segmenting in the center of a height direction, and intermediate floor part 11 and the rear floor portion 12 may have shapes. In addition, the slope portion 11 b may be joined to the intermediate floor portion 11 and the rear floor portion 12 as a separate component from the intermediate floor portion 11 and the rear floor portion 12.

  The slide rail portion 20 is disposed on a straight line from the intermediate floor portion 11 to the rear floor portion 12 across the step (step portion) formed by the slope portion 11b. Further, the slide rail portion 20 includes a slide rail 21 and a fixing portion 22 that fixes the slide rail 21 to the floor portion 10. The slide rail 21 is joined to the fixing portion 22 by welding, and the fixing portion 22 is fixed to the floor portion 10 by bolt fastening. In addition, two slide rails 21 are arranged side by side in the center in the vehicle width direction, and slide rails 21 are longer than the slide rail 21 'and arranged one by one outside the slide rail 21'. In the present embodiment, the second row seat E is two independent seats, and the third row seat F is one bench seat that can be seated by a plurality of persons. As a result, the second row seat E can slide the slider E1 by the length of the slide rail 21 ', and the third row seat F has the second row seat E and the slide rail 21. "" And the slider F can slide on the slide rail 21 ".

  The restricting portion 30 includes a restricting member 31 that extends in the vehicle width direction, and a fixing portion 32 that fixes the restricting member 31 to the intermediate floor portion 11. The regulating member 31 extends linearly over the entire vehicle width direction of the intermediate floor portion 11, and its end 31a is located at a position where it overlaps with the rear side door C in a side view of the vehicle.

  Further, as shown in FIG. 4, the regulating member 31 passes through the space formed by the intermediate floor portion 11, the slope portion (step portion) 11 b and the slide rail portion 20 and extends in the vehicle width direction. . The regulating member 31 is a tubular member such as an iron pipe, and is joined to the fixing portion 32 by welding, and the fixing portion 32 is fixed to the intermediate floor portion 11 by bolt fastening.

  In this embodiment, the regulating member 31 is an iron member. However, aluminum, FRP (reinforced plastic), or the like may be used if necessary strength can be ensured. Moreover, although the regulating member 31 is a tubular member in the present embodiment, it may be a solid member.

  In the present embodiment, the restricting member 31 is welded to the fixing portion 32, and the fixing portion 32 is bolted to the intermediate floor portion 11, but may be fixed by other means. I do not care.

  In the vehicle body lower structure 100 of the present invention, when the rear side door C tries to enter the vehicle interior at the time of a side collision of the vehicle A, the end 31a of the regulating member 31 contacts the rear side door C and the displacement into the vehicle interior is regulated. Thus, the rear side door C is prevented from entering the vehicle interior. Further, the regulating member 31 extends in the vehicle width direction through the space formed by the intermediate floor portion 11, the slope portion (step portion) 11b, and the slide rail portion 20, and is originally planned as a living space. Since it is provided in the dead space that is not done, it does not harm the occupant's habitability.

  In the following embodiments or modifications, the same reference numerals are given to the same configurations as those in the first embodiment described above, and description thereof is omitted.

[First Modification of First Embodiment]
In the first embodiment described above, the restricting member 31 is fixed to the intermediate floor portion 11 by the fixing portion 32. However, in the present modification, the restricting member 31 is fixed to the slide rail 21 by the fixing portion 32. Different.

  FIG. 5 is a cross-sectional view in the vehicle front-rear direction of the vehicle body lower structure 100 according to the first modification of the first embodiment. The regulating member 31 is joined to the fixing portion 32 by welding, and the fixing portion 32 is fixed to the slide rail 21 ″ by bolt fastening. Note that the fixing portion 32 is fixed to the slide rail 21 ″ in this modification. However, it may be fixed to the slide rail 21 'or may be fixed to both.

  According to this modification, the load borne by the restricting portion 30 can be distributed to the slide rail portion 20, and the rear side door C can be more effectively prevented from entering the vehicle interior from the opening B.

[Modification 2 of the first embodiment]
In the first embodiment and the first modification thereof, the regulating member 31 is fixed to the intermediate floor portion 11 or the slide rail 21 ″ by the fixing portion 32 that fixes only the regulating member 31. The restriction member 31 is different in that it is fixed to the intermediate floor portion 11 together with the slide rail 21 by a fixing portion 22 that fixes the slide rail 21.

  FIG. 6 is a cross-sectional view of the vehicle body lower structure 100 according to the second modification of the first embodiment in the vehicle front-rear direction. The restricting portion 30 has the slide rail 21 but does not have the fixing portion 22. The slide rail portion 20 includes a slide rail 21 and a fixed portion 22. The regulating member 31 is fixed to the intermediate floor portion 11 together with the slide rail 21 by the fixing portion 22 of the slide rail portion 20.

  According to this modification, the load borne by the restricting portion 30 can be distributed to the slide rail portion 20 and the floor portion 10, and the rear side door C can be more effectively prevented from entering the vehicle interior from the opening B.

[Modification 3 of the first embodiment]
In Modifications 1 and 2 of the first embodiment described above, the attachment position of the restriction member 31 is changed. In this modification, the restriction part 30 is located at a position overlapping the side frame 40 in a vehicle plan view. This is different in that it is fixed to the floor portion 10.

  FIG. 7 is a plan view of the vehicle body lower structure 100 according to Modification 3 of the first embodiment. The floor portion 10 has a side frame 40 that extends in the front-rear direction of the vehicle A and supports the floor portion 10 from below. The restricting member 31 is fixed to the floor portion 10 by the fixing portion 32 at a position overlapping the side frame 40 in a vehicle plan view.

  According to this modification, the load borne by the regulating member 31 can be distributed to the floor portion 10 and the side frames 40, and the rear side door C can be more effectively prevented from entering the vehicle interior.

[Modification 4 of the first embodiment]
In the third modification of the first embodiment described above, the restriction member 31 is disposed at a position overlapping the side frame 40 in a vehicle plan view. However, in the present modification, the restriction member 31 is disposed when the rear side door C is closed. It is different in that it is disposed at a position overlapping a rod-shaped reinforcing member (hereinafter referred to as an impact bar) in a side view of the vehicle.

  FIG. 8 is a cross-sectional view in the vehicle front-rear direction of the vehicle body lower structure 100 according to Modification 4 of the first embodiment. The rear side door C has an inner panel and an outer panel (not shown). An impact bar C1 that supports a load at the time of a side collision is fixed to the inner panel. The impact bar C1 has a bar C1a and attachment portions C1b with inner panels at both ends thereof, and extends obliquely in the vehicle longitudinal direction so that the vehicle rear side is lowered. The restricting member 31 is disposed at a position where the end 31a overlaps the impact bar C1 when the rear side door C is closed in a side view of the vehicle.

  According to this modification, at the time of a side collision of the vehicle A, the end 31a of the regulating member 31 comes into contact with the impact bar C1 that first bears the load, and the rear side door C moves from the opening B to the vehicle interior. Intrusion can be more effectively prevented.

  In this embodiment, the reinforcing member is an impact bar. However, when the end 31a of the restricting member 31 comes into contact with the reinforcing member assembled to the inner panel at the time of a side collision, the vehicle of the rear side door C is used. The present invention can be applied to reinforcing parts other than impact bars as long as they can prevent entry into the room.

Second Embodiment
In the first embodiment described above, the regulating member 31 has a structure in which the end 31a does not overlap with the rear side door C in a plan view of the vehicle when the rear side door C is closed. It differs in that it is a structure that overlaps with the rear side door C in a vehicle plan view.

  FIGS. 9A and 9B are partial cross-sectional views in the vehicle width direction of the vehicle body lower structure 100 according to the second embodiment. FIGS. 10A and 10B are partially enlarged views for explaining the configuration around the accommodating portion C4. FIG. The side sill 50 includes an outer panel 51 and an inner panel 52. The outer panel 51 has a recess 51a, and a slide rail 51b that slides the support portion C5 of the rear side door C in the front-rear direction of the vehicle A therein. The intermediate floor portion 11 has a flange portion 11 a connected to the inner panel 52 of the side sill portion 10. The fixing portion 32 of the restricting portion 30 is fixed to the intermediate floor portion 11, and the restricting member 31 is fixed to the fixing portion 32. Further, a bottom raising member G is disposed on the upper part of the intermediate floor portion 11 and the side sill inner 11, and a floor carpet (not shown) is disposed on the upper part of the bottom raising member G.

  The rear side door C is composed of an outer panel C2 and an inner panel C3. The inner panel C3 has a housing part C4 that houses the end 31a of the regulating member 31, and the housing part C4 is a mounting part C1b of the impact bar C1. Fixed by welding or the like. The accommodating part C4 has a notch C4a so as not to interfere with the regulating member 31 when the rear side door C slides. The inner panel C3 forms a hole C3a in a strip shape along the front-rear direction of the vehicle A. However, since the rear side door C is immediately pulled out of the vehicle A when the opening operation is started, the hole C3a does not need to be provided at a long distance, and the strength of the rear side door C is not affected. That is, when opening and closing the rear side door C, the restricting member 31 passes through the hole C3a of the inner panel, and thus does not interfere and is housed in the housing portion C4 with the rear side door C closed. In addition, the accommodating portion C4 is slightly smaller than the diameter of the end portion 31a of the regulating member 31 so that it does not contact the regulating member 31 except at the time of a side collision, and can exhibit the effect to the maximum at the side collision. Set to be larger.

  According to the present embodiment, the end 31a of the restricting member 31 is accommodated in the accommodating portion C4, so that the end 31a of the restricting member 31 is reliably brought into contact with the rear side door C at the time of a side collision of the vehicle A. It is possible to more effectively prevent the door C from entering the vehicle interior.

<Third Embodiment>
In the first embodiment and the second embodiment described above, the example in which the regulating member 31 extends over the entire area in the vehicle width direction of the intermediate floor portion 11 has been described. An example that does not reach the entire area in the vehicle width direction will be described. In addition, about the structure similar to 2nd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 11 is a partial cross-sectional view in the vehicle width direction of the vehicle body lower structure 100 according to the third embodiment. The inner panel C3 of the rear side door C has a portion that overlaps the intermediate floor portion 11 in a plan view of the vehicle. That is, the inner panel C3 has a protruding portion C6 that protrudes toward the inside of the vehicle, and receives a load from the regulating member 31 at the protruding portion C6. Moreover, in this embodiment, the iron pipe C7 is being fixed to the attachment part C1b of the impact bar C1, and the front-end | tip part C7a is distribute | arranged to the position adjacent to the protrusion part C6. Thereby, the load at the time of a side collision can be immediately transmitted to the control member 31.

  Therefore, when the intermediate floor portion 11 is joined to the side sill 50 relatively outside the vehicle as in the present embodiment, the regulating member 31 does not reach the entire vehicle width direction of the intermediate floor portion 11. However, since the same effect can be obtained, the present invention can be applied.

[Modification 1 of the third embodiment]
In the third embodiment described above, the inner panel C3 of the rear side door C has the protruding portion C6 toward the vehicle interior, and the restriction member 31 may not reach the entire area of the intermediate floor portion 11. However, in this modification, other examples are illustrated.

  FIG. 12 is a perspective view of the vehicle body lower structure 100 according to Modification 1 of the third embodiment. The intermediate floor portion 11 has a tunnel-shaped bulged portion 11c at the center in the vehicle width direction. Two regulating portions 30 are arranged on the same straight line in the vehicle width direction with the bulging portion 11c interposed therebetween. The restricting member 31 is fixed by the fixing portion 32 so that the end portion 31b on the vehicle inner side is located at a position close to the vertical wall of the bulging portion 11c.

  According to this modification, when the intermediate floor portion 11 has the bulging portion 11 c at the center, the end portion 31 a of the regulating member 31 contacts the bulging portion 11 c of the intermediate floor portion 11 when the vehicle A undergoes a side collision. Therefore, the rear side door C can be more effectively prevented from entering the vehicle interior.

  In this modification, the restricting member 31 is arranged so that the end 31a is located near the bulging portion 11c, but the end 31a is connected to the bulging portion 31a by welding or the like. It doesn't matter.

1 is an external perspective view of a vehicle A according to an embodiment of the present invention. 1 is a perspective view of a vehicle body lower structure 100 according to a first embodiment. 1 is a plan view of a vehicle body lower structure 100 according to a first embodiment. It is sectional drawing along the AA line of FIG. It is sectional drawing of the vehicle front-back direction of the vehicle body lower structure 100 which concerns on the modification 1 of 1st Embodiment. It is sectional drawing of the vehicle front-back direction of the vehicle body lower structure 100 which concerns on the modification 2 of 1st Embodiment. It is a top view of the vehicle body lower structure 100 which concerns on the modification 3 of 1st Embodiment. It is sectional drawing of the vehicle front-back direction of the vehicle body lower structure 100 which concerns on 2nd Embodiment. FIG. 10 is a partial cross-sectional view in the vehicle width direction of a vehicle body lower structure 100 according to Modification 1 of the second embodiment. (A) And (b) is the elements on larger scale for demonstrating the structure of the accommodating part C4 periphery. It is a fragmentary sectional view of the vehicle width direction of body lower part structure 100 concerning a 3rd embodiment. It is a perspective view of the vehicle body lower part structure 100 which concerns on the modification 1 of 3rd Embodiment.

Explanation of symbols

B Opening part C Rear side door E Second row seat 10 Floor part 11 Intermediate floor part 11b Slope part (step part)
12 Rear floor portion 20 Slide rail 30 Restriction member 31a End portion 100 Lower body structure

Claims (7)

An opening forming a rear entrance to the vehicle interior that is opened and closed by the rear side door;
An intermediate floor portion that is disposed along the opening and forms a floor surface of the second row seat arrangement space, and is formed continuously through the step portion on the intermediate floor portion, more than the intermediate floor portion. A floor portion having a rear floor portion forming a floor surface of a rear rear cabin space behind the intermediate floor portion, the floor surface having a high height,
A linear slide rail disposed across the stepped portion from the intermediate floor portion to the rear floor portion to guide the front-rear movement of the second row seats;
The vehicle body lower structure with
Extending in the vehicle width direction, the end thereof is located at a position overlapping the rear side door in a side view of the vehicle, and includes a regulating member that regulates displacement of the rear side door into the vehicle interior,
The vehicle body lower structure, wherein the restricting member extends in a vehicle width direction through a space formed by the intermediate floor portion, the step portion, and the slide rail. The rear side door includes an inner panel, an outer panel, and a rod-shaped reinforcing member disposed between the inner panel and the outer panel;
The reinforcing member has attachment portions with the inner panel at both ends thereof, and extends obliquely in the vehicle front-rear direction so that the vehicle rear side is lowered,
The vehicle body lower part structure according to claim 1, wherein the restriction member is disposed at a position where the end portion overlaps the reinforcing member in a side view of the vehicle when the rear side door is closed.   The vehicle body lower part structure according to claim 1, wherein the restricting member is fixed to the slide rail. A fixing portion for fixing the slide rail to the floor portion;
The vehicle body lower structure according to claim 1, wherein the fixing portion fixes the regulating member to the floor portion together with the slide rail. The vehicle further includes a side frame that extends in the vehicle front-rear direction and supports the floor portion,
The vehicle body lower part structure according to claim 1 or 2, wherein the restricting member is fixed to the floor portion at a position overlapping the side frame in a plan view of the vehicle.   The vehicle body lower structure according to any one of claims 1 to 5, wherein the restricting member extends linearly over the entire vehicle width direction of the intermediate floor portion.   The vehicle body lower part structure according to any one of claims 1 to 6, wherein an accommodation portion for accommodating an end portion of the restriction member is provided in the rear side door when the rear side door is closed.

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