JP5071882B2 - Vehicle compartment bottom structure - Google Patents

Description

  The present invention relates to a vehicle compartment bottom structure, and more particularly to a heel pad having a rear-falling inclined tread surface portion on which a portion from a heel portion of a rear seat seated occupant to a thumb ball portion can be placed. The present invention relates to a passenger compartment bottom structure disposed below a seat cushion.

  In general, in a vehicle such as an automobile, a floor panel that forms a passenger compartment floor is disposed, an outer end portion in the vehicle width direction is coupled to a side sill, and a floor tunnel is provided in the center in the vehicle width direction. Further, there is a known one that includes a front cross member that is connected to a side sill and a floor tunnel and is coupled to the upper surface of a floor panel and that is long in the vehicle width direction.

  Further, in a vehicle having a front seat and a rear seat, a center pillar that partitions the front seat side opening and the rear seat side opening is disposed, and a lower end portion of the center pillar is coupled to a side sill, It is known that a side sill and a floor tunnel are connected to each other at the same position in the front-rear direction as the lower end portion of the center pillar, and a cross member long in the vehicle width direction is coupled to the upper surface of the floor panel.

  By the way, a vehicle configured such that a foot of a rear seat seated occupant enters a lower space of a front seat cushion has been put into practical use (for example, see Patent Document 1).

  In the lower vehicle body structure of Patent Document 1, the cylindrical cross member passes below the front seat cushion with a space upward from the upper surface of the floor panel at a position in the front-rear direction slightly ahead of the lower end of the center pillar. The foot of the rear seated occupant can be placed under the cross member, and the outer end of the cross member in the vehicle width direction is coupled to the center pillar of the side sill via a reinforcing member. It is connected to the vicinity.

  On the other hand, a vehicle equipped with a front seat and a rear seat is usually equipped with a rear seat belt (seat belt device) to increase the collision safety for the rear seat passenger and is used for the rear seat. Wearing seat belts is also becoming mandatory. As this rear seat belt, a so-called three-point seat belt is mainly used.

JP 2000-159148 A

  In a vehicle configured such that the foot of the rear seat seat occupant enters the lower space of the front seat cushion, it is advantageous to make the vehicle more compact while securing the seat space for the rear seat occupant, Simply placing the toes of the rear seated occupant in the space below the front seat cushion cannot improve the sitting comfort by ensuring that the toe of the rear seated occupant is in a good position and posture. At the time of a front collision, the foot of the rear seated occupant who tries to move forward with respect to the vehicle cannot be stepped on, so that the possibility of the foot of the rear seated occupant moving forward increases.

  Then, if the foot of the rear seated occupant moves forward, it is induced and the hip point of the rear seated occupant may move forward. At this time, the seated occupant wearing the seat belt However, there is a possibility that the proper occupant restraint function by the seat belt may not be exhibited, and there is a possibility that the shin of the rear seat seated occupant will hit the front seat cushion strongly.

  In a vehicle with a cross member that connects a side sill and a floor tunnel at the same longitudinal position as the lower end of the center pillar, to the passenger compartment side of the joint between the side sill and the center pillar where stress concentration occurs when the vehicle collides However, in normal times, the toes of the rear seated occupant may come into contact with the cross member and the seating comfort may be worsened. May hit the cross member strongly.

  Therefore, the actual situation is that the height of the cross member is kept low with respect to the upper surface of the floor, but the closed cross section formed by the cross member and the floor panel is also reduced, and the side sill and the center pillar There is a concern that the function of the cross member that suppresses the entry of the joint portion to the vehicle compartment side is lowered, and that the center pillar falls to the vehicle compartment side due to deformation of the side sill. In the lower vehicle body structure of Patent Document 1, the configuration of the cross member and the like are improved so that the feet of the rear seated occupant can enter, but the above-described problems can hardly be improved.

  SUMMARY OF THE INVENTION An object of the present invention is to improve the seating comfort in a vehicle compartment bottom structure of a vehicle so that the toes of a rear seated occupant are in a good position / posture, and forward to the vehicle at the time of a vehicle front collision. To prevent the rear seated occupant trying to move, restraining the forward movement of the legs and hip points of the rear seated occupant, and exerting an appropriate occupant restraint function by the seat belt worn by the rear seated occupant And the like, deepening the foot space of the rear seated occupant, enhancing the function of the cross member and improving the vehicle side collision performance, and so on.

The vehicle compartment bottom structure of a vehicle according to claim 1 includes a floor panel on which a front seat and a rear seat are installed, and a vehicle is configured such that a foot of a seated occupant in the rear seat enters a space below the front seat cushion. In the vehicle compartment bottom structure, a side sill to which an outer end in the vehicle width direction of the floor panel is coupled, and a pillar having a lower end coupled to the side sill, the pillar separating the front seat side opening and the rear seat side opening. And the floor tunnel provided on the center side in the vehicle width direction of the floor panel and the side sill and the floor tunnel connected at the same front-rear direction position as the lower end portion of the pillar, along the upper surface of the floor panel. and long cross member to disposed the vehicle width direction so as to pass below the seat cushion, the floor top surface located below the front seat cushion of the floor panel It is arranged so as to bulge towards, and a heel pad having a portion capable mounted backwards down sloping tread portion to thumb ball portion from at least the heel portion of the seated occupant's foot in the rear seat, the heel The pad is formed of an elastic member capable of exerting an impact mitigating function, and the heel pad is formed so that the tread surface portion is an inclined surface, and the cross member is formed so that the front and rear portions of the cross member are thick. A recess for fitting the member is provided, and is configured to cover the cross member .

  In this vehicle compartment bottom structure, a front panel and a rear seat are installed on the floor panel so that the feet of the rear seated occupant enter the space below the front seat cushion. A heel pad is arranged so as to bulge upward from the upper surface of the floor located below the seat cushion, and this heel pad is a rear where at least a portion from the buttocks of the rear seated occupant can be placed. It has a tread surface with a downward slope.

  Therefore, the rear seated occupant puts his toes into the lower space of the front seat cushion, places at least the part of the foot from the buttocks to the thumb ball part on the tread part of the heel pad, When the front position of the vehicle is improved and the seating comfort is improved, and the frontal collision of the vehicle occurs, the rear seated occupant trying to move forward with respect to the vehicle by the heel pad that has a sloped tread surface. When the foot is tightened, the rear seat seat occupant's foot is restrained from moving forward, and therefore the rear seat seat occupant's hip point is restrained from moving forward.

Here, the following configurations can be adopted as the dependent claims .

In front of the cross member, a side cross and a floor tunnel are connected to each other, and a front cross member long in the vehicle width direction disposed along the upper surface of the floor panel is provided, and the floor panel is positioned in front of the front cross member. Connects the front of the floor panel, the rear of the floor panel located behind the front cross member and lower than the front of the floor panel, the rear edge of the front of the floor panel, and the front edge of the rear of the floor panel The front cross member is formed in a cross-sectional hat shape and is coupled to the vicinity of the floor panel step portion of the floor panel, and cooperates with the floor panel step portion. Thus, a closed cross section is formed (claim 2 ).

The kick-up portion extending upward is provided at the rear end of the floor panel rear, the floor panel from said upper end portion of the kick-up portion having a rear floor panel which is rear-seat extends rearward is installed (claim 3 ).

  According to the vehicle interior bottom structure of the vehicle according to claim 1, the floor panel is disposed so as to bulge upward from the upper surface of the floor located below the front seat cushion, and at least the heel of the seated occupant's foot in the rear seat Since the heel pad has a rear-falling inclined tread surface portion on which the portion from the head portion to the thumb ball portion can be placed, the rear seat seat occupant puts his feet into the lower space of the front seat seat cushion, Place at least the part of the foot from the buttocks to the toe ball on the tread surface of the heel pad so that the toes are in a good position and posture, and the angle of the lower limb joint is also moderate with respect to the angle of the ankle The heel pad with a sloped tread surface, especially when the rear seated occupant wears a seat belt, in the event of a frontal collision of the vehicle. Have In this case, the foot of the rear seat seated occupant moves forward so that the rear seat seated occupant tries to move forward with respect to the vehicle, so that the foot of the rear seat seated occupant is tightened. Therefore, the hip point of the rear seat seated occupant can be prevented from moving forward, and the rear seat seated occupant can exert an appropriate occupant restraint function by the seat belt worn, and the rear seat seated It can also be suppressed that the shin of the occupant strongly hits the front seat cushion. The foot of the rear seat occupant enters the space below the front seat cushion, which is advantageous for making the vehicle more compact while securing the seat space for the rear seat occupant. The space below the seat cushion can be used effectively so that it does not get in the way.

Further, in the same longitudinal direction position as the lower end of the pin Ra, longer cross member to disposed the vehicle width direction as before along the upper surface of the side sill and the floor connecting the tunnel floor panel pass below the seat cushion With this cross member, it is possible to suppress the entrance of the joint part of the side sill and pillar where stress concentration occurs when the vehicle side crashes into the passenger compartment, and the heel pad is configured to cover this cross member Therefore, maintaining the function of the cross member, that is, allowing the above-mentioned arrangement of the cross member so that the foot of the rear seated occupant does not come into contact with the cross member during a normal collision or a vehicle front collision. Can do.
Further, since the heel pad is formed of an elastic member capable of exerting an impact mitigating function, when the front seat of the rear seated occupant trying to move forward with respect to the vehicle by the heel pad, the ankle is stretched by the heel pad. Can reduce the impact on the etc.

According to the vehicle compartment bottom structure of the vehicle according to claim 2 , the front cross member that is connected to the side sill and the floor tunnel and is disposed along the upper surface of the floor panel is provided in front of the cross member and is long in the vehicle width direction. The floor panel includes a floor panel front portion located in front of the front cross member, a floor panel rear portion located behind the front cross member and lower in height than the floor panel front portion, and a rear edge of the floor panel front portion. The front cross member is formed in a cross-sectional hat shape and is connected to the vicinity of the floor panel step portion of the floor panel. Since the closed cross section is formed in cooperation with the floor panel step portion, the height of the rear portion of the floor panel is lowered with respect to the front portion of the floor panel, so that the front seat The height position, the upper end height position of the cross member and the front cross member are left as they are, that is, without greatly changing the design of the existing vehicle, the closed cross section of the cross member and the front cross member is enlarged, These functions can be enhanced to improve vehicle side impact performance, and the foot space of the rear seat seat occupant can be expanded deeply, that is, the seating space can be expanded. Since it can expand, the heel pad which can mount the foot | leg of a rear seated passenger | crew can be arrange | positioned reliably in this downward space.

According to the vehicle compartment bottom structure of claim 3, the kick-up portion that rises upward is provided at the rear end portion of the rear portion of the floor panel, and the rear panel extends from the upper end portion of the kick-up portion to the rear seat. Since the rear floor panel is provided, the rear floor panel, the rear seat, and the like can be deepened in the foot space of the rear seat seated occupant with the existing configuration.

The vehicle compartment bottom structure of the vehicle according to the present invention includes a floor panel on which a front seat and a rear seat are installed, and the vehicle is configured such that a foot of a seated occupant in the rear seat enters a lower space of the front seat cushion. In the bottom structure of the passenger compartment , a side sill to which an outer end portion of the floor panel in the vehicle width direction is coupled, a pillar having a lower end coupled to the side sill and separating the front seat side opening and the rear seat side opening, and the floor Connect the side sill and the floor tunnel at the same longitudinal position as the lower end of the pillar and the floor tunnel provided in the center of the panel in the vehicle width direction, and pass under the front seat cushion along the upper surface of the floor panel. long and cross member are arranged so as to bulge from the floor top surface located below the front seat cushion of the floor panel upward, the rear seat disposed the vehicle width direction And a heel pad having a rear edge inclined tread portion capable placing a portion of at least the heel portion to the thumb ball portion of the seated occupant's foot, heel pad is formed of an elastic member capable of exerting an impact relaxation function The heel pad is formed to have a tread surface as an inclined surface, and is provided with a recess into which the cross member is fitted so that the front and rear portions of the cross member are thick and covers the cross member. ing.

  As shown in FIGS. 1 to 5, a vehicle compartment bottom structure 1 of a vehicle C (automobile C) includes a floor panel 2 having a front floor panel 3 and a rear floor panel 4, a floor tunnel 5, a kick-up portion 6, and a front cross. A member 7 (No. 2 cross member 7), a cross member 8 (No. 2.5 cross member 8), a rear cross member 9 (No. 3 cross member 9), a floor frame 10, and a heel pad 11 are provided. .

  The front floor panel 3, the front cross member 7, the cross member 8, the floor frame 10, and the heel pad 11 are each provided in a pair of left and right, and a pair of left and right front seats 12 is installed on the pair of left and right front floor panels 3. The rear floor panel 4 is provided with a rear seat 13 positioned behind the front seat 12 and is equipped with a not-shown sieve belt (sievert device) for restraining seated occupants of the front seat 12 and the rear seat 13 respectively. As the rear seat 13, a pair of left and right rear seats 13 may be provided similarly to the front seat 12, or a bench seat type rear seat 13 may be employed.

  In this vehicle C, a pair of left and right side sills 14, a pair of left and right front seat side openings 15, a pair of left and right rear seat side openings 16, and a front seat side opening 15 and a rear seat side opening 16 are partitioned. A pair of left and right pillars 17 (center pillars 17) extending in the vertical direction are provided, and the lower ends of the pair of pillars 17 are coupled to the pair of side sills.

  The side sill 14 includes an inner member 14a, a reinforcement 14b, and an outer member 14c, and these members 14a to 14c are coupled to each other to form a closed cross section. An upper inner member 14d and an upper reinforcement 14e are provided, and these members 14d and 14e are coupled to each other and to the inner member 14a and the reinforcement 14b to form a double closed cross section. The pillar 17 also has an inner member, a reinforcement, and an outer member (not shown), which are coupled to each other to form a closed section.

  The vehicle interior bottom structure 1 will be described in detail. Basically, the passenger compartment bottom structure 1 is a left-right symmetric structure, and only one (left side) of the left-right symmetric structure will be described.

  The front floor panel 3 has a front end portion coupled to a lower end portion of a dash panel (not illustrated) that partitions an engine room (not illustrated) and a vehicle compartment, and an outer end portion in the vehicle width direction is coupled to a side sill 14. A floor tunnel 5 is provided at the center in the vehicle width direction, and an engine exhaust pipe (not shown) is installed along the lower surface side of the floor tunnel 5. A pair of left and right front floor panels 3 are integrally formed with the floor tunnel 5.

  A kick-up portion 6 that rises upward is provided at the rear end portions of the front floor panel 3 and the floor tunnel 5, the rear floor panel 4 extends rearward from the upper end portion of the kick-up portion 6, and a fuel tank ( (Not shown) is installed. The rear floor panel 4 has at least a part of the outer end in the vehicle width direction coupled to the rear portion of the side sill 14 and the rear end coupled to a rear end panel (not shown) that partitions the rear end of the passenger compartment (loading compartment). Has been.

Front floor panel 3 is substantially higher than the horizontal and the floor panel front 3a, located at a little distance behind the floor panel front 3a and floor panel front 3a located in front of the front cross member 7 A substantially horizontal floor panel rear portion 3b having a low position, and a floor panel step portion 3c having a gentle downward downward slope connecting the rear edge portion of the floor panel front portion 3a and the front edge portion of the floor panel rear portion 3b.

  The floor panel step portion 3c is located below the front portion of the front seat 12 in front of the front-rear direction position of the lower end portion of the pillar 17, and the floor panel front portion 3a is a passenger compartment floor for the seated occupant of the front seat 12. The rear portion of the floor panel rear portion 3b forms the passenger compartment floor for the seat 13 and the rear end portion of the floor panel rear portion 3b has an inclined rear portion 3d that gently slopes upward. A kick-up portion 6 is formed at the rear end portion of the floor panel rear portion 3b.

  The front cross member 7 is disposed in front of the cross member 8 so as to connect the side sill 14 and the floor tunnel 5 so as to extend in the vehicle width direction along the upper surface of the floor panel 2 (front floor panel 3). The front portion of the front seat 12 is attached to the cross member 7. The front cross member 7 is formed in a cross-sectional hat shape, is coupled to the vicinity of the floor panel step portion 3c of the front floor panel 3, and forms a closed cross section in cooperation with the floor panel step portion 3c.

  The front cross member 7 has a horizontal upper wall portion 7a, a front wall portion 7b, and a rear wall portion 7c. The rear wall portion 7c extends downward from the front wall portion 7b, and a lower end flange portion of the front wall portion 7b. 7b1 is coupled to the upper surface of the vicinity of the rear edge of the floor panel front portion 3a, and the lower end flange portion 7c1 of the rear wall portion 7c is coupled to the upper surface of the vicinity of the front edge of the floor panel rear portion 3b.

  The cross member 8 connects the side sill 14 and the floor tunnel 5 at the same longitudinal position as the lower end of the pillar 17 and extends in the vehicle width direction along the upper surface of the floor panel 2 (front floor panel 3). It is arrange | positioned so that it may pass under 12a. The cross member 8 is formed in a hat shape in cross section, is coupled to the floor panel rear portion 3b of the front floor panel 3, and forms a closed cross section in cooperation with the floor panel rear portion 3b.

  The cross member 8 has an upper wall portion 8a, a front wall portion 8b, and a rear wall portion 8c that are gently inclined backward and downward. The cross member 8 has a height of about ½ of the front cross member 7, and the upper wall portion 8a. Is positioned at substantially the same height as the rear edge of the floor panel front portion 3a, and the lower end flange portions 8b1 and 8c1 of the front wall portion 8b and the rear wall portion 8c are coupled to the upper surface of the floor panel rear portion 3b.

  The rear cross member 9 is disposed so as to extend in the vehicle width direction along the back surface of the connection portion between the kick-up portion 6 and the rear floor panel 4, and couples the pair of side sills 14 together. The rear cross member 9 is formed, for example, in an L-shaped cross section, and is coupled to the upper end portion of the kick-up portion 6 and the front end portion of the rear floor panel 4 to form a closed cross section in cooperation with them.

Here, the front seat seat cushion 12a has a pair of left and right seat frames 12b. These seat frames 12b are connected by a pair of front and rear connecting rods 12c and 12d, and a cushion body is attached to the pair of seat frames 12b. A cushion receiver 12e to be placed is connected. A pair of left and right upper rails 12f are connected to a pair of seat frames 12b via connecting brackets 12g, respectively, and these upper rails 12f are supported by a pair of left and right lower rails 12h so as to be slidable in the front-rear direction. The front ends of the pair of lower rails 12h are attached to the front cross member 7 via attachment brackets 12i.

Here, in the same position in the front-rear direction and the cross member 8, the floor tunnel 5 and the side sill 14, the height position higher reinforcing members 18 and 19 than the cross member 8 projecting into the cross member 8 side are respectively coupled, these reinforcing The members 18 and 19 are connected to both ends of the cross member 8 in the vehicle width direction, and the pair of lower rails 12h are attached to the reinforcing members 18 and 19 via attachment brackets 12j, respectively.

  The floor frame 10 is disposed between the side sill 14 and the floor tunnel 5 so as to extend in the front-rear direction along the front floor panel 3. The floor frame 10 is coupled to the lower surface of the floor panel front portion 3a and the rear end portion is coupled to the floor panel step portion 3c from the lower surface side, and is coupled to the upper surface of the floor panel rear portion 3b and the front end. The floor frame step portion 3c is coupled to the floor panel step portion 3c from the upper surface side, and the floor frame front portion 20 has a floor frame rear portion 21 connected in a straight shape via the floor panel step portion 3c.

  The front portion 20 of the floor frame is formed in a reverse hat shape in cross section, and its upper end flange portion 20a is coupled to the floor panel front portion 3a, and its rear end flange 20b is coupled to the floor panel step portion 3c. 3 (floor panel front part 3a and floor panel step part 3c) is formed so as to form a closed cross section, and the lower end part thereof is continuously connected to the floor panel rear part 3b at the same height position. Yes.

  The floor frame rear portion 21 is formed in a hat shape in cross section, and its lower end flange portion 21a is coupled to the floor panel rear portion 3b, and its front end flange 21b is coupled to the floor panel step portion 3c, so that the front floor panel 3 (floor A closed cross section is formed in cooperation with the panel rear portion 3b and the floor panel step portion 3c), and the upper end portion thereof is configured to be continuously connected to the floor panel front portion 3a at the same height position.

  The rear portion 21 of the floor frame extends through the front cross member 7 and the cross member 8 and is coupled to the front cross member 7 and the cross member 8. As for the front cross member 7, a gate-shaped coupling flange portion 7 c 2 is formed on the rear wall portion 7 c so as to protrude from a through portion of the floor frame rear portion 21, and is coupled to the surface of the floor frame rear portion 21.

  With respect to the cross member 8, the front wall portion 8b and the rear wall portion 8c are formed with gate-shaped coupling flange portions 8b2 and 8c2 so as to protrude from the penetrating portion of the floor frame rear portion 21, and the surface of the floor frame rear portion 21 is formed. Is bound to. The rear end portion of the floor frame rear portion 21 is joined and terminated to the inclined rear portion 3d of the floor panel rear portion 3b. However, the rear end portion of the floor frame rear portion 21 may be directly coupled to the kick-up portion 6.

  Here, the connecting rod 12d of the front seat cushion 12a, etc., between the foot Ma of the seat occupant M (rear seat occupant M) of the rear seat 12 between the pair of left and right rails 12f (12h) of the front seat 12, etc. In the front floor panel 3, the height of the front panel rear portion 3b is lowered with respect to the floor panel front portion 3a. As a result, the lower space 25 can be sufficiently entered even when the toe Ma of the seated occupant M of the rear seat is large.

  The heel pad 11 is disposed so as to bulge upward from the floor upper surface 26 located below the front seat cushion 12a in the rear portion 3b of the floor panel, and the heel pad 11 extends from at least the heel Mb of the foot of the seated occupant M of the rear seat. It is formed of an elastic member made of hard urethane, rubber, or the like that has a rear-falling inclined tread surface portion 11a on which a portion up to the portion Mc (which may include the finger portion Md) can be placed, and that can exert an impact mitigating function. ing.

  It should be noted that the portion from the buttocks Mb to the thumb ball Mc of the rear seated occupant M is not necessarily placed on the tread portion 11a but includes a part thereof (for example, an arch). It suffices if the unexposed portion can be placed on the tread portion 11a, and the tread portion 11a is formed as such.

The heel pad 11 will be described in detail. The heel pad 11 has a front-rear length that is about half of the front seat cushion 12a, and is positioned below the rear portion of the front seat cushion 12a that is located slightly rearward. Is formed in a right-angled triangle with the tread surface portion 11a as a long side ( slanted side) in the cross section, and the heel pad 11 has a horizontal surface portion 11b at the rear end of the lower end. Is formed to extend rearward.

The heel pad 11 is formed with the tread surface portion 11a as an inclined surface , covers the cross member 8 so that the front and rear portions of the cross member 8 are thick, and the front seat in the rear portion 21 of the floor frame. The cushion 13 is configured to cover the position portion below the rear portion. For this purpose, the heel pad 11 is formed with an engaging recess 11c into which the cross member 8 that is long in the vehicle width direction is fitted from the lower surface side, and a floor frame rear portion 21 that is long in the front-rear direction orthogonal to the engaging recess 11c. An engaging recess 11d to be fitted is formed.

  Here, the heel pad 11 has substantially the same vehicle width direction length as the distance between the side sill 14 and the floor tunnel 5 so as not to interfere with the reinforcing members 18 and 19 located on both sides in the vehicle width direction. The portions corresponding to the reinforcing members 18 and 19 at both ends in the width direction are notched, or have a length in the vehicle width direction that enters between the reinforcing members 18 and 19.

  The heel pad 11 is preferably fixed to the floor panel rear portion 3c, the cross member 8, and the floor frame rear portion 21 by some fixing means. In addition, a floor sheet 29 is laid on the surface of the heel pad 11, and the floor sheet 29 includes a front floor panel 3, a rear floor panel 4, a floor tunnel 5, a kick-up portion 6, a front side in addition to the surface of the heel pad 11. It is also laid on the main surface of the cross member 7, the cross member 8, and the like.

The operation and effect of the compartment bottom structure 1 described above will be described.
The front floor panel 3 (floor panel rear part 3b) is arranged so as to bulge upward from the floor upper surface 26 located below the front seat cushion 12a, and has a thumb from at least the buttock Mb of the foot of the rear seated occupant M Since the heel pad 11 having the tread surface portion 11a having a downwardly descending slope on which the portion up to the ball portion Mc can be placed is provided, the rear seat seat occupant M has the foot Ma at the lower space 25 of the front seat cushion 12a. And place at least the portion of the foot from the buttocks Mb to the thumb ball Mc on the tread surface portion 11a of the heel pad 11 so that the foot tip Ma has a good position / posture, and the angle of the ankle On the other hand, the angle of the lower limb joint can be set to an appropriate angle, so that the sitting comfort can be improved.

  When a frontal collision of the vehicle occurs, the heel pad 11 having the tread surface portion 11a that is inclined downward is moved forward with respect to the vehicle C, particularly when the rear seated occupant M is wearing a seat belt. The leg of the rear seated occupant M can be restrained from moving forward so that the foot of the rear seated occupant M can be prevented from moving forward so that the rear seated occupant M will not be forced. The hip point HP of the seated occupant M can be prevented from moving forward, the rear seated occupant M can exert an appropriate occupant restraint function by the seat belt worn, and the shin Me of the rear seated occupant M And the like can be prevented from strongly hitting the front seat cushion 12a.

  Although the toe Ma of the rear seat seat occupant M enters the lower space 25 of the front seat seat cushion 12a, it is advantageous for ensuring the seat space for the rear seat seat occupant M and reducing the size of the vehicle C. Further, since the heel pad 11 can be installed so as not to obstruct the effective use of the lower space 25 of the front seat cushion 12a, this effect is not hindered.

  Here, not only the frontal collision of the vehicle, but when the vehicle C suddenly brakes, the foot of the rear seated occupant M is strung by the heel pad 11, so that the rear seated occupant M is wearing a seat belt. Even if there is not, the foot and the hip point HP of the seated occupant M are difficult to move forward. For example, when the seated occupant M has drinking water, the drinking water overflows. You can also expect to avoid.

  In addition, the heel pad 11 has a function of narrowing the space between the front seat seat cushion 12a and the front seat Ma of the rear seat seated occupant M so that it does not easily move forward. That is, when the frontal collision of the vehicle, the toe Ma of the seated occupant M of the rear seat moves slightly forward so that it no longer moves forward, and the hip point HP of the seated occupant M of the rear seat moves forward. Even if the foot seat Ma of the rear seat seat occupant M moves slightly forward, the ti May hit the front seat seat cushion 12a. At that time, the heel pad 11 will absorb the shock somewhat, and the shin Me of the rear seat seated passenger M will hit the front seat cushion 12a strongly. Can be expected to suppress as much as possible.

  At the same longitudinal position as the lower end portion of the pillar 17, the side sill 14 and the floor tunnel 5 are connected to each other in the vehicle width direction arranged so as to pass under the front seat cushion 12 a along the upper surface of the front floor panel 3. Since the long cross member 8 is provided, the cross member 8 can suppress the entry of the joint portion of the side sill 14 and the pillar 17 where stress concentration occurs at the time of a vehicle side collision into the passenger compartment side. Since the heel pad 11 is configured to cover, the function of the cross member 8 is maintained, that is, the above-described arrangement of the cross member 8 is allowed, and a foot tip Ma of the rear seated occupant M is normally attached to the cross member 8. It is possible to prevent contact at times and at the time of vehicle front collision.

  In front of the cross member 8, the side sill 14 and the floor tunnel 5 are connected to each other, and a front cross member 7 that is disposed along the upper surface of the front floor panel 3 and is long in the vehicle width direction is provided. A floor panel front part 3a located in front of the member 7, a floor panel rear part 3b located behind the front cross member 7 and lower in height than the floor panel front part 3a, and a rear edge of the floor panel front part 3a The front cross member 7 is formed in a cross-sectional hat shape and has a floor panel step portion of the front floor panel 3. It is combined with the vicinity of 3c to form a closed section in cooperation with the floor panel step 3c.

  Therefore, by lowering the height position of the floor panel rear part 3b with respect to the floor panel front part 3a, the height position of the front seat 12 and the upper end height positions of the cross member 8 and the front cross member 7 are left as they are. In other words, it is possible to increase the closed cross section of the cross member 8 and the front cross member 7 without significantly changing the design of the existing vehicle, to enhance their functions, and to improve the vehicle side collision performance. The foot space of the rear seat seat occupant M can be expanded deeply, that is, the seat space can be expanded. Here, the lower space 25 of the front seat cushion 12a can be widened up and down. The heel pad 11 on which the foot tip Ma can be placed can be surely arranged.

  Since the kick-up part 6 that rises upward is provided at the rear end part of the floor panel rear part 3b, the floor panel 2 has a rear floor panel 4 that extends rearward from the upper end part of the kick-up part 6 and on which the rear seat 13 is installed. As for the rear floor panel 4 and the rear seat 13, the foot space of the rear seat seated occupant M can be deeply expanded while maintaining the existing configuration.

  Since the heel pad 11 is formed of an elastic member capable of exerting an impact mitigating function, when the front seat of the rear seated occupant M who tries to move forward with respect to the vehicle C is strung by the heel pad 11 at the time of frontal collision of the vehicle. Can reduce the impact on the ankles.

In addition, you may change the said Example partially as follows.
1) The size and shape of the heel pad 11 (such as the inclination angle of the tread portion 11a) can be changed as appropriate .
2 ) The front floor panel 3 may be formed substantially horizontally as a whole.
3 ) The front cross member 7 and the cross member 8 may be formed in a cylindrical shape .

  In addition, various modifications can be added without departing from the spirit of the present invention, and the vehicle compartment bottom structure of the vehicle according to the present invention can be various automobiles having a front seat and a rear seat, or It can be applied to various vehicles other than automobiles.

It is the perspective view which abbreviate | omitted the front seat and rear seat of the vehicle interior bottom part structure of a vehicle. It is the top view which abbreviate | omitted the front seat and rear seat of the vehicle interior bottom part structure. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG.

C Vehicle M Rear-seat occupant Ma Foot tip Mb Knee part Mc Thumb part 1 Car compartment bottom structure 2 Floor panel 3 Front floor panel 3a Floor panel front part 3b Floor panel rear part 3c Floor panel step part 4 Rear floor panel 5 Floor tunnel 6 Kick-up part 7 Front cross member 8 Cross member 11 Heel pad 11a Tread part 12 Front seat 12a Front seat seat cushion 13 Rear seat 14 Side sill 15 Front seat side opening 16 Rear seat side opening 17 Pillar 25 Lower space 26 Floor upper surface

Claims (3)

In a vehicle compartment bottom structure configured to include a floor panel on which a front seat and a rear seat are installed, and a foot of a seated occupant in the rear seat enters a lower space of the front seat cushion,
A side sill to which the vehicle width direction outer end of the floor panel is coupled;
A pillar whose lower end is coupled to the side sill, and which separates the front seat side opening and the rear seat side opening,
A floor tunnel provided in the vehicle width direction center side of the floor panel;
A cross which is long in the vehicle width direction and is disposed so as to connect the side sill and the floor tunnel and pass below the front seat cushion along the upper surface of the floor panel at the same longitudinal position as the lower end of the pillar. Members,
The floor panel is arranged so as to bulge upward from the upper surface of the floor located below the front seat cushion, and at least a part of the foot of the seated occupant in the rear seat from the buttocks can be placed and a heel pad having a sloping tread portion rear edge,
The heel pad is formed of an elastic member capable of exhibiting an impact relaxation function,
The heel pad is formed so that the tread surface portion is an inclined surface, and a recess into which the cross member is fitted is provided so that the front and rear portions of the cross member are thick, and covers the cross member. A vehicle compartment bottom structure, characterized in that it is configured. In front of the cross member, a side cross and a floor tunnel are connected to each other, and a front cross member long in the vehicle width direction disposed along the upper surface of the floor panel is provided.
The floor panel includes a floor panel front portion positioned in front of the front cross member, a floor panel rear portion positioned rearward of the front cross member and lower in height than the floor panel front portion, and the rear of the floor panel front portion. A floor panel stepped portion having a downwardly descending slope connecting the edge and the front edge of the rear portion of the floor panel;
2. The front cross member is formed in a hat shape in cross section, and is coupled to a vicinity of a floor panel step portion of the floor panel to form a closed cross section in cooperation with the floor panel step portion. A vehicle compartment bottom structure according to claim 1. A kick-up portion that rises upward is provided at the rear end of the rear portion of the floor panel,
The vehicle compartment bottom structure according to claim 2, wherein the floor panel includes a rear floor panel that extends rearward from an upper end portion of the kick-up portion and on which a rear seat is installed .