JP2010083165A - Lower body structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively utilize the space formed below a floor panel while preventing the vehicle height from becoming high and the like. <P>SOLUTION: A first floor panel side 9 that becomes a mounting part of a first rear row seat 5 is disposed on one side in the vehicle width direction of a tunnel 8 projectingly arranged in the floor panel of a cabin, a second floor panel side 10 that becomes a mounting part of a second rear row seat 6 is disposed on the other side in the vehicle width direction of the tunnel 8, the first floor panel side 9 is disposed higher than the second floor panel side 10, a vehicular auxiliary machine including a fuel tank 11 and the like is disposed below at least the first floor panel side 9, and a vehicular function part including an intermediate cross member 45 and the like is arranged between the vehicular auxiliary machine and the first floor panel side 9. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lower body of a vehicle in which a pair of left and right front row seats including a driver seat and a passenger seat are arranged side by side on a floor panel of a passenger compartment, and a pair of left and right rear row seats are arranged side by side behind the front row seat. Concerning structure.

  Conventionally, as shown in the following Patent Document 1, a rear portion of a rear floor panel for installing a rear seat is lifted upward and a fuel tank having a shape in which a rear portion is higher than a front portion is formed along the lower surface of the rear floor. In the rear vehicle body structure of the mounted vehicle, a vertical surface portion is formed between the rear floor panel and the luggage floor panel behind the rear floor panel, and a first cross member is disposed on the front side of the floor panel, and the fuel tank of the vertical surface portion A second cross member is disposed between the tire and the spare tire, and a suspension member is disposed below the fuel tank.

Further, in Patent Document 2 below, in a fuel tank disposed on the lower side of a floor panel at the rear of a vehicle body of an automobile, a substantially horizontal tank front located below the rear seat, and an inclined rear kick on the floor A fuel tank formed in a substantially crank shape in a side view is disclosed in which a tank inclined portion located below an up portion and a rear floor front portion connected to the upper end of the rear kick-up floor portion of the floor are integrally formed. Yes.
Japanese Patent Laid-Open No. 6-211169 JP-A-5-627

  As disclosed in Patent Documents 1 and 2 above, when a vehicle auxiliary machine comprising a fuel tank or the like is disposed below the floor panel located at the installation portion of the rear row seat (rear seat), There is an advantage that the fuel tank or the like having a predetermined capacity can be installed by effectively utilizing the space formed below by kicking up the installation portion of the rear row seat while reducing the size.

  However, if the floor panel is positioned above in order to install a large-capacity vehicle auxiliary machine below the rear row seat, the vehicle height increases accordingly, or a tall person sits on the rear row seat In addition, there is a problem that the distance between the head portion and the roof portion becomes narrow. On the other hand, in order to prevent the vehicle height from becoming high, when the floor panel located at the rear row seat installation portion is positioned below, there is sufficient space for installing the vehicle auxiliary equipment. There was a problem that it was difficult to secure.

  The present invention has been made in view of the above problems, and it is possible to effectively use a space formed below a floor panel while preventing an increase in vehicle height and the like. Its purpose is to provide a structure.

  In the invention according to claim 1, a pair of left and right front row seats including a driver seat and a passenger seat are arranged side by side on the floor panel of the passenger compartment, and a pair of left and right rear row seats are arranged behind the front row seat. In the vehicle, in the vehicle width direction central portion of the floor panel, a tunnel portion protruding toward the vehicle interior side is installed so as to extend in the vehicle front-rear direction, and on one side of the tunnel portion in the vehicle width direction, A first floor panel side portion serving as an installation portion for the first rear row seat is disposed, and a second floor panel side portion serving as an installation portion for the second rear row seat is disposed on the other side in the vehicle width direction of the tunnel portion. Is disposed below the first floor panel side portion, and at least a vehicle auxiliary device is disposed below the first floor panel side portion, and the vehicle auxiliary device and the first floor panel side portion are disposed. The functional part for vehicles is between It is what was kicked.

  According to a second aspect of the present invention, in the lower body structure of the vehicle according to the first aspect of the present invention, the vehicle is composed of a cross member extending in the vehicle width direction between the vehicular auxiliary machine and the first floor panel side portion. A functional unit is provided.

  According to a third aspect of the present invention, in the lower body structure of the vehicle according to the second aspect of the present invention, rear side frames extending in the front-rear direction of the vehicle body are installed on the left and right sides of the floor panel, and the cross member is a rear side frame. It is installed toward the tunnel part.

  According to a fourth aspect of the present invention, in the lower body structure of the vehicle according to the second or third aspect, the vehicular accessory is a fuel tank, and a recess corresponding to the cross member is formed on an upper surface thereof. It is.

  According to a fifth aspect of the present invention, in the vehicle lower body structure according to any one of the first to fourth aspects of the present invention, the vehicle below the first floor panel side portion is below the second floor panel side portion. A vehicle auxiliary machine that is smaller than the auxiliary machine is provided.

  According to a sixth aspect of the present invention, in the vehicle lower body structure according to any one of the first to fifth aspects, the first rear row seat disposed on the side of the first floor panel is the first lower row seat. 2 It is formed smaller than the back row sheet.

  According to a seventh aspect of the present invention, in the lower body structure of the vehicle according to the sixth aspect, a first floor panel side portion is disposed on the rear side of the driver seat, and a second floor is disposed on the rear side of the passenger seat. A panel side portion is provided.

  According to an eighth aspect of the present invention, in the lower body structure of the vehicle according to the first aspect, the vehicle auxiliary device is disposed on the rear side of the vehicle auxiliary device between the vehicle auxiliary device and the first floor panel side portion. A vehicle function unit including a traveling wind guide unit that guides the traveling wind toward the differential is provided.

  According to a ninth aspect of the present invention, in the vehicle lower body structure according to the eighth aspect, the vehicular accessory is a fuel tank, and a guide groove constituting the traveling wind guide portion is formed on an upper surface thereof. Is.

  In the invention according to claim 1, the first floor panel side portion is disposed above the second floor panel side portion, and the vehicle auxiliary device is disposed at least below the first floor panel side portion, and Since the vehicular functional part is provided between the vehicular auxiliary machine and the first floor panel side part, a large space is secured above the second floor panel side part and the passenger seated on the second rear seat There is an advantage that the living environment can be effectively improved and the vehicle functional unit can be installed by effectively using the space formed below the side portion of the first floor panel.

  In the invention according to claim 2, the cross member is disposed on the side of the first floor panel located at the installation portion of the first rear row seat where it is difficult to sufficiently secure the strength by arranging the strong seat cushion frame. By providing the vehicular functional part, the second floor panel side by effectively utilizing the space formed below the first floor panel side part located above the second floor panel side part. Since the portion can be effectively reinforced, even when the first and second floor panel side portions are formed asymmetrically, there is an advantage that the rigidity can be set evenly with a simple configuration. .

  In the invention according to claim 3, in the vehicle in which the rear side frame extending in the front-rear direction of the vehicle body is installed on both the left and right sides of the floor panel, the cross member is installed from the rear side frame toward the tunnel portion. By effectively supporting the impact load input at the time of the collision by the cross member, the rigidity of the vehicle body can be sufficiently improved with a simple configuration.

  In the invention according to claim 4, since the vehicular auxiliary machine including the fuel tank is disposed below the side portion of the first floor panel and the concave portion corresponding to the cross member is formed on the upper surface thereof, the cross member serves as the fuel. There is an advantage that a sufficient capacity of the fuel tank can be ensured by making the upper surface of the fuel tank close to the lower surface of the side portion of the first floor panel while preventing interference with the tank.

  In the invention according to claim 5, since the vehicle auxiliary machine smaller than the vehicle auxiliary machine below the first floor panel side part is disposed below the second floor panel side part, the second floor panel There is an advantage that the space provided in the lower part of the side part can be used effectively.

  In the invention which concerns on Claim 6, the 1st back row sheet | seat arrange | positioned on the said 1st floor panel side part is formed smaller than a 2nd back row sheet, and this 2nd back row sheet is formed relatively large. Therefore, it is possible to allow a tall person to sit on the second rear row seat without taking measures such as installing the roof portion of the vehicle at a high position, and to ensure a sufficient distance between the head portion and the roof portion. By preventing the occupant from feeling intimidating, it is possible to effectively ensure the comfort of the occupant seated on the second rear row seat while ensuring the degree of freedom in vehicle body design. In addition, since the first rear row seat that is formed smaller than the second rear row seat and is used for a child or a small woman is installed on the side of the first floor panel, the upper surface position of the seat cushion is set. Without adopting a means such as displaceable, while ensuring a sufficient distance between the head of the occupant seated on the first rear row seat and the roof portion, preventing the occupant from feeling intimidating The vehicle can be a four-seater.

  In the invention which concerns on Claim 7, while arrange | positioning the 1st floor panel side part in which a relatively small 1st back row seat is installed in the back side of a driver's seat, the 2nd back row seat which has normal size is provided. Since the side part of the second floor panel to be installed is disposed on the rear side of the passenger seat, the passenger seat is positioned forward of the driver seat, and thus has a height and the like seated on the second rear row seat. There is an advantage that a sufficient space can be secured in front of the occupant and its comfort can be effectively improved.

  In the invention which concerns on Claim 8, between the said vehicle auxiliary machine and the 1st floor panel side part, the driving | running | working wind guide part which guides driving | running | working wind toward the differential arrange | positioned in the back side of the vehicle auxiliary machine. Since the vehicle function section is provided, the traveling wind supplied to the front part of the vehicle auxiliary machine is guided to the differential installation section by the traveling wind guide section, thereby suppressing the temperature rise of the differential. There is an advantage that the occurrence of the heat damage can be effectively prevented.

  In the invention according to claim 9, since the guide groove that constitutes the traveling wind guide portion is formed on the upper surface of the fuel tank, the traveling wind supplied to the front portion of the auxiliary machine for the vehicle with a simple configuration is used. By guiding to the differential installation portion by the wind guide portion, there is an advantage that the temperature rise of the differential can be suppressed and the occurrence of the heat damage can be effectively prevented.

  1 and 2 show a schematic configuration of a vehicle provided with a seat device according to the first embodiment of the present invention. In the vehicle compartment 1, a pair of left and right front row seats including a driver's seat 3 and a passenger seat 4 are arranged side by side on the floor panel 2, and a pair of left and right rear row seats 5, 6 are provided on the rear side. Rear side frames 7 that are arranged side by side and extend in the front-rear direction of the vehicle are installed on the left and right sides of the lower surface of the floor panel 2. In addition, a tunnel portion 8 that protrudes toward the inside (upward) of the passenger compartment 1 is installed at the center in the vehicle width direction of the floor panel 2 so as to extend in the front-rear direction of the vehicle.

  As shown in FIGS. 3 and 4, a first floor panel side portion 9 serving as an installation portion for the first rear row seat 5 is disposed on one side of the tunnel portion 8 in the vehicle width direction. On the other side of the portion 8 in the vehicle width direction, as shown in FIGS. 3 and 5, a second floor panel side portion 10 serving as an installation portion for the second rear row seat 6 is disposed. Under the first floor panel side portion 9 and the second floor panel side portion 10 located between the left and right rear side frames 7, a vehicular auxiliary machine comprising a fuel tank 11 is disposed.

  A propeller shaft 12, an exhaust pipe 13, a reinforcing frame 14 having a crank-shaped cross section, and the like are installed below the tunnel portion 8 so as to extend in the front-rear direction of the vehicle body. Further, a rear floor panel 16 is connected to the rear side of the first floor panel side portion 9 and the second floor panel side portion 10 via a kick-up portion 15. A differential 17 for transmitting the driving force of the propeller shaft 12 to the left and right rear wheels, a rear wheel suspension member (not shown), and the like are disposed.

  The first floor panel side portion 9 is connected to the front floor panel 2 via a first kick-up portion 18 provided at the front end portion thereof, so that the bottom surface of the first floor panel side portion 9 is in front. It is disposed above the floor panel 2 and above the bottom surface 7 a of the rear side frame 7. On the other hand, the second floor panel side portion 10 is connected to the front floor panel 2 via a second kick-up portion 19 provided at the front end thereof, so that the bottom surface of the second floor panel side portion 10 is These are disposed above the floor panel 2 and below the bottom surface 7a of the rear side frame 7. That is, when the kick kick amount of the first kick-up portion 18 is formed larger than that of the second kick-up portion 19, the first floor panel side portion 9 is disposed above the second floor panel side portion 10. Has been.

  In the first embodiment, a first floor panel side portion 9 is disposed on the rear side of the driver's seat 3 located on the left side of the passenger compartment 1 and the rear of the passenger seat 4 located on the right side of the passenger compartment 1. On the side, the second floor panel side portion 10 is disposed. Further, as shown in FIG. 2, a central recess 20 that is recessed toward the rear side of the vehicle and an outer side extending in the vehicle width direction from both right and left ends are provided in front of the driver seat 3 and the passenger seat 4. A dash panel 23 having a pair of left and right dash side portions 21 and 22 is disposed. One of the two dash side portions 21, 22, specifically, the right dash side portion 21 located on the front side of the passenger seat 4 is more than the left dash side portion 22 located on the front side of the driver seat 3. By being arranged offset to the front side of the vehicle, the passenger seat 4 can be moved further forward than the driver seat 3.

  The driver's seat 3 and the passenger seat 4 are erected at a rear end portion of a seat cushion 25 supported so as to be slidable in the longitudinal direction of the vehicle body along a slide rail (not shown) installed on the floor panel 2. And a reclining mechanism 27 that supports the seat back 26 so as to be tiltable. The reclining mechanism 27 is configured to displaceably support at least a use state in which the seat back 26 is raised and a retracted state in which the seat back 26 is tilted forward of the vehicle body.

  The first rear row seat 5 disposed on the first floor panel side portion 9 located on the rear side of the driver's seat 3 is a relatively small seat used for children or small women. The seat cushion 28 is mainly composed of a relatively hard material made of a high-resilience urethane foam material or the like, and is installed on the first floor panel side portion 9. Further, the seat back 29 of the first rear seat 5 is supported in a swingable manner with a first support shaft 30 formed of a horizontal shaft provided at the lower end thereof as a fulcrum, similarly to a normal passenger seat. .

  On the other hand, the second rear row seat 6 installed on the second floor panel side portion 10 located on the rear side of the passenger seat 4 has a normal size that a tall person can sit on, that is, the upper body of the tall person. The seat cushion 31 has a vertical dimension that can be properly supported, and the seat cushion 31 is mainly composed of a relatively soft material made of, for example, a low-resilience urethane foam material. It is formed more flexibly than the seat cushion 28.

  The seat cushion 31 of the second rear seat 6 is provided with a seat cushion frame 32 made of a square pipe material or the like, as indicated by the broken lines in FIGS. 3 and 5. Further, the seat cushion 31 of the second rear row seat 6 has a thickness corresponding to the height difference between the first floor panel side portion 9 and the second floor panel side portion 10 and the seat of the first rear row seat 5. By setting it larger than the cushion 28, the upper surface of the seat cushion 31 of the second rear row seat 6 and the upper surface of the seat cushion 28 of the first rear row seat 5 are substantially the same height when the occupant is not seated. It is installed as follows.

  As shown in FIGS. 5 and 6, the seat back 36 of the second rear row seat 6 is supported so as to be swingable via a reclining mechanism 37 located in the middle portion in the vertical direction, thereby setting the installation angle thereof. It is configured to be changeable according to preference. The reclining mechanism 37 includes a vehicle body side cylindrical portion 39 supported by the upper end surface of the upper cross member 38 installed on the front upper surface of the rear floor panel 16, and a central portion inserted into the vehicle body side cylindrical portion 39. A pair of left and right seat back side tubular portions 41 that are fixed to the back surface portion of the seat back 36 and into which the left and right side portions of the second support shaft 40 are inserted. And have.

  Then, the second support shaft 40 disposed above the first support shaft 30 provided at the lower end portion of the seat back 29 of the first rear seat 5, that is, at the intermediate portion in the vertical direction of the seat back 36. The seat back side tubular portion 41 is pivotally displaced at the fulcrum, so that the lower end portion of the seat back 36 is positioned in the vicinity of the rear end portion of the seat cushion 31 as shown by the solid line in FIG. As shown by the phantom line in FIG. 5, the lower end portion of the seat back 36 is positioned slightly forward of the rear end portion of the seat cushion 31, and the reclining position with the increased inclination angle is set as described above. The seat back 36 can be displaced. The seat back 36 of the second rear row seat 6 is locked to the standard position and the reclining position via a lock mechanism (not shown).

  The fuel tank 11 includes a first tank portion 42 disposed below the first floor panel side portion 9, a second tank portion 43 disposed below the second floor panel side portion 10, and the tunnel. It is formed in a bowl shape by an inverted U-shaped communication tank portion 44 disposed in the portion 8. The thickness of the first tank portion 42 is set smaller than that of the second tank portion 43 by a distance corresponding to the height difference between the first floor panel side portion 9 and the second floor panel side portion 10. . Thus, when the upper surfaces of the first and second tank portions 42 and 43 are installed along the lower surfaces of the first and second floor panel side portions 9 and 10, respectively, the first and second tank portions 42 are provided. , 43 are configured so that the lower surfaces thereof are substantially the same height.

  As shown in FIGS. 3, 4 and 7, the lower surface of the first floor panel side portion 9 is formed from the side wall surface of the rear side frame 7 toward the tunnel portion 8 along the middle portion in the front-rear direction. A vehicular functional unit including an intermediate cross member 45 extending in the vehicle width direction is provided. A recess 46 corresponding to the intermediate cross member 45 is formed on the upper surface of the first tank portion 42 so as to extend in the vehicle width direction. A rear cross member 47 extending in the vehicle width direction is installed on the rear surface of the kick-up portion 15, and a front surface extending in the vehicle width direction is provided on the lower surface of the floor panel 2 positioned in front of the fuel tank 11. The fuel tank 11 is attached to the vehicle body by a tank band 49 in which a front cross member 48 is installed and a front end is bolted to the front cross member 48 and a rear end is bolted to the rear cross member 47. It is supposed to be fixed.

  As described above, a pair of left and right front row seats including the driver's seat 3 and the passenger seat 4 are arranged side by side on the floor panel 2 of the passenger compartment 1, and a pair of left and right rear row seats 5 and 6 are arranged behind the front row seat. In the installed vehicle, a tunnel portion 8 protruding toward the inside of the passenger compartment 1 is installed at the center of the floor panel 2 in the vehicle width direction so as to extend in the front-rear direction of the vehicle. A first floor panel side portion 9 serving as an installation portion for the first rear row seat 5 is disposed on one side in the direction, and an installation portion for the second rear row seat 6 is disposed on the other side in the vehicle width direction of the tunnel portion 8. The second floor panel side portion 10 is disposed, and the first floor panel side portion 9 is disposed above the second floor panel side portion 10, and at least below the first floor panel side portion 10. A vehicle supplement comprising a fuel tank 11 and the like In addition, since the vehicle functional unit including the intermediate cross member 45 and the like is provided between the vehicle auxiliary machine and the first floor panel side portion 9, the vehicle height is prevented from being increased. In addition to ensuring a large space above the second floor panel side portion 10 and effectively improving the living environment of the passenger seated on the second rear row seat, it is formed below the first floor panel side portion 9. There is an advantage that the rigidity of the vehicle body can be sufficiently secured by effectively using the space that is provided.

  That is, the second rear row seat 6 that can be sufficiently secured by being installed on the second floor panel side portion 10 disposed below the first floor panel side portion 9. By disposing a seat cushion frame 32 having a predetermined rigidity on the seat cushion 31, it is possible to sufficiently secure the strength of the second floor panel side portion 10 against a load or the like input at the time of a side collision of the vehicle. it can. On the other hand, as shown in the first embodiment, the first floor panel side portion 9 located in the installation portion of the first rear row seat 5 where it is difficult to dispose a seat cushion frame having a predetermined rigidity is provided. Compared with the second floor panel side part 10 by providing a vehicle functional part comprising the intermediate cross member 45 between the vehicle auxiliary machine (fuel tank 11) and the first floor panel side part 9. Thus, the second floor panel side portion 10 can be effectively reinforced by effectively utilizing the space formed below the first floor panel side portion 9 positioned above.

  Accordingly, as described above, the first floor panel side portion 9 is disposed above the second floor panel side portion 10, and at least a vehicle auxiliary machine is disposed below the first floor panel side portion 9, Since the vehicular functional part including the fuel tank 11 is provided between the vehicular auxiliary machine and the first floor panel side part 9, a wide space is secured above the second floor panel side part 10 to ensure the second. By effectively improving the living environment of the occupant seated in the rear row seat 6 and by effectively using the space formed below the first floor panel side portion 9, the vehicle function unit is installed. Even when the first and second floor panel side portions 9 and 10 are formed asymmetrically in the left and right direction, there is an advantage that the rigidity can be evenly set with a simple configuration.

  Further, as shown in the first embodiment, in the vehicle in which the rear side frames 7 extending in the front-rear direction of the vehicle body are installed on the left and right sides of the floor panel 2, the intermediate cross member 45 is connected to the tunnel portion from the rear side frame 7. When installed toward the vehicle 8, the impact load input at the time of a side collision of the vehicle can be effectively supported by the intermediate cross member 45, so that the rigidity of the vehicle body can be sufficiently improved with a simple configuration. Can do.

  In particular, in the first embodiment, the vehicular auxiliary machine including the fuel tank 11 is disposed below the first floor panel side portion 10 and the recess 46 corresponding to the intermediate cross member 45 is formed on the upper surface thereof. By installing the upper surface of the fuel tank 11 close to the lower surface of the first floor panel side portion 10 while preventing the intermediate cross member 45 from interfering with the fuel tank 11, the fuel tank 11 There is an advantage that a sufficient capacity can be secured.

  Further, as described above, the vehicular auxiliary machine (first tank) installed below the first floor panel side portion 9 below the first floor panel side portion 9 positioned below the second floor panel side portion 10. In the case where the second tank part 43 of the fuel tank 11 is arranged, for example, a vehicle accessory smaller than the part 42), the space formed below the second floor panel side part 10 Effective use can be achieved.

  Instead of the first embodiment in which the first and second tank portions 42 and 43 of the fuel tank 11 are disposed below the first and second floor panel side portions 9 and 10, the first floor is replaced. A vehicle auxiliary device made of a lithium ion battery or the like is disposed below the panel side portion 9 and, if necessary, smaller than the vehicle auxiliary device disposed below the first floor panel side portion 9. By arranging a vehicle auxiliary machine, such as a vehicle control unit box, below the second floor panel side portion 10, the space below the first and second floor panel side portions 9, 10 is used effectively. You may comprise.

  A first tank portion 42 of the fuel tank 11 is disposed below the first floor panel side portion 9, and a second tank portion 43 is disposed below the second floor panel side portion 10. According to the configuration of the first embodiment in which the tank portion 43 is formed to have a larger capacity than the first tank portion 42 and communicated with the first tank portion 42, the height of the bottom surface is as described above. The fuel tank 11 having a sufficient capacity can be installed by effectively using the lower space of the first and second floor panel side portions 9 and 10 set at different positions, and the first and second tank portions 42, There is an advantage that the lower surface of 43 can be set to substantially the same height.

  Moreover, in the said 1st Embodiment, as shown in FIG. 3, the 1st, 2nd tank parts 42 and 43 arrange | positioned under the 1st and 2nd floor panel side parts 9 and 10, and the tunnel part 8 are provided. Since the fuel tank 11 is formed in a bowl shape by the communication tank portion 44 disposed therein, the space located below the first and second floor panel side portions 9 and 10 and the tunnel portion 8 is effective. There is an advantage that the capacity of the fuel tank 11 can be sufficiently secured. In particular, when the communication tank portion 44 is formed in an inverted U shape, the propeller shaft 12, the exhaust pipe 13 and the reinforcing frame 14 disposed in the tunnel portion 8 interfere with the fuel tank 11. This has the advantage that the capacity of the fuel tank 11 can be effectively increased.

  Further, the first rear row sheet 5 disposed on the first floor panel side portion 9 as described above is formed smaller than the second rear row sheet 6 disposed on the second floor panel side portion 10. On the second floor panel side portion 10 positioned relatively lower than the first floor panel side portion 9, the second rear row seat 6 having a normal size on which a tall person can sit is installed. In the case of the structure, the vertical space for installing the rear row seat 6, that is, the distance from the second floor panel side portion 10 to the ceiling portion can be sufficiently secured without increasing the vehicle height. .

  Therefore, according to the lower body structure of the vehicle according to the first embodiment, the distance between the head of the occupant seated on the second rear row seat 6 and the roof is too narrow, and the occupant is intimidated. While preventing the height of the occupant's living environment by making it possible for a tall person to sit on the rear row seat 6 in an easy posture, and increasing the degree of freedom of the vehicle body design, the vehicle body is effectively made compact There are advantages such as being able to. In addition, the first floor panel side portion 9 located above the second floor panel side portion 10 is formed smaller than the second rear row seat 6 and used for children or small women. Since the first rear seat 5 is disposed, the vehicle can be made to be a four-seater while securing a wide space for installing the auxiliary machine for the vehicle below the first rear seat 5.

  In the first embodiment, the seat cushion 31 of the second rear row seat 6 is mainly composed of a relatively soft material made of, for example, a low-resilience urethane foam material, and the seat of the first rear row seat 5. The cushion 28 is mainly composed of a relatively hard material made of, for example, a high resilience urethane foam material, so that the seat cushion 31 of the second rear row seat 6 is more flexible than the seat cushion 28 of the first rear row seat 5. It has a structure. Thus, when the occupant is not seated, as shown in FIG. 3, the seat cushion 31 of the second rear row seat 6 installed at substantially the same height as the upper surface of the seat cushion 28 of the first rear row seat 5 is shown in FIG. As shown, the upper surface of the seat cushion 31 is made to be larger than the seat cushion 28 of the first rear row seat 5 by being deformed to be larger than the seat cushion 28 of the first rear row seat 5 according to the weight of the occupant sitting. Since it is configured to be able to be displaced downward, when the passenger is not seated, as shown by the phantom line in FIG. 3, a long baggage is placed on both the seat cushions 28, 31 installed at substantially the same height. There is an advantage that M can be placed in a horizontal state.

  Furthermore, in the said 1st Embodiment, while arrange | positioning the said 1st floor panel side part 9 in which the relatively small 1st back row seat 5 is installed in the back side of the driver's seat 3, it has a normal magnitude | size. Since the second floor panel side portion 10 on which the second rear row seat 6 is installed is disposed on the rear side of the passenger seat 4, the front seat 4 is positioned in front of the driver seat 3, thereby the second rear row. There is an advantage that a sufficient space can be secured in front of a tall occupant seated on the seat 6 and the comfortability thereof can be improved effectively.

  In particular, as shown in the first embodiment, the right dash side portion 21 located on the front side of the passenger seat 4 is positioned more forward of the vehicle than the left dash side portion 22 located on the front side of the driver seat 3. When the passenger seat 4 is configured to be positioned forward of the driver seat 3 by being offset to the side, the comfortability of the passenger seated on the second rear row seat 6 is It can improve more effectively.

  In the first embodiment, the seat back 36 of the second rear row seat 6 is supported so as to be swingable with the second support shaft 40 of the reclining mechanism 37 disposed in the intermediate portion in the vertical direction as the fulcrum. The living environment of the occupant seated on the rear row seats 5 and 6 can be effectively improved without deteriorating the aesthetic appearance in the installation portion of the rear seats 5 and 6.

  Since the rear floor panel 16 disposed on the rear side of the second floor panel side portion 10 and the like is installed in a state where it is kicked up in order to install the differential 17 below the front part thereof, a normal occupant If the seat back is oscillated and displaced with the lower end as a fulcrum as in the case of the seat for the seat, the lower part of the seat back 36 interferes with the kick-up portion 15 provided at the front end of the rear floor panel 16, The seat back 36 cannot be greatly tilted backward. On the other hand, when the seat back 36 is swingably supported with the second support shaft 40 of the reclining mechanism 37 disposed in the middle in the vertical direction of the seat back 36 as described above, While preventing the seat back 36 from interfering with the kick-up portion 15, the installation angle can be displaced to a reclining position that is greatly inclined backward.

  Therefore, as shown in the first embodiment, the first floor is configured such that the seat back 36 is swingably supported with the second support shaft 40 disposed in the middle in the vertical direction of the seat back 36 as a fulcrum. An occupant made up of an adult male seated on the second rear row seat 6 formed larger than the small first rear row seat 5 installed on the panel side portion 9, that is, the vehicle interior space is easily felt, A high stature that tends to stabilize the seating state by changing the inclination angle of the seat back 36 does not feel tired even when sitting on the second rear row seat 6 for a long time. There is an advantage that the seating posture can be appropriately changed as necessary by largely oscillating and displacing the seat back 36 with the second support shaft 40 as a fulcrum.

  On the other hand, a child or a small woman seated on the small first rear row seat 5 is less demanding to stabilize the seating state by changing the inclination angle of the seat back 29 than a large passenger. Therefore, in order to avoid the seat back 36 from interfering with the kick-up portion 15 provided on the rear side of the second floor panel side portion 10 which is the installation portion of the second rear row seat 6, the tilt range is restricted. Even if it is done, there is no particular problem. Therefore, like a normal passenger seat, by supporting the seat back 29 of the first rear row seat 5 in a swingable manner with the first support shaft 30 formed of a horizontal shaft provided at the lower end thereof as a fulcrum, There is an advantage that the structure can be simplified.

  In place of the first embodiment in which the seat back 36 of the second rear row seat 5 is pivotally supported by using the second support shaft 40 of the reclining mechanism 37 as a fulcrum, a second shown in FIG. As in the embodiment, the seat back 36 is divided into an upper seat back 36a and a lower seat back 36b, and both or one of the upper seat back 36a and the lower seat back 36b is used as the upper seat back. The second support shaft 40 installed between the lower seat back 36b and the lower seat back 36b may be swingably supported.

  For example, the lower seat back 36 b of the rear row seat 5 is fixedly installed along the front surface of the kick-up portion 15, and the pair of left and right support brackets 50 provided on the upper cross member 38 includes a horizontal axis. The second support shaft 40 may be held, and only the upper seat back 36a may be swingably supported using the second support shaft 40 as a fulcrum. In the second embodiment, the second rear row seat 6 is attached to the second rear row seat 6. The upper seat is supported by the second support shaft 40 as a fulcrum so that a tall occupant made up of an adult male seated does not feel tired even when sitting on the second rear row seat 5 for a long time. By swinging and moving the back 36a back and forth, there is an advantage that the seating posture can be appropriately changed as necessary.

  In the first embodiment, the seat cushion 31 of the second rear row seat 6 is mainly composed of a relatively soft material made of, for example, a low-resilience urethane foam material, and the seat of the first rear row seat 5. The cushion 28 is mainly composed of a relatively hard material made of, for example, a high resilience urethane foam material, and the thickness thereof is made smaller than the seat cushion 31 of the second rear row seat 6, whereby the first rear row seat 5. However, the present invention is not limited to this configuration, and various modifications can be made.

  For example, the seat cushion 31 of the second rear row seat 6 installed on the second floor panel side portion 10 positioned relatively lower than the first floor panel side portion 9 is shown in FIGS. 10 and 11. As in the third embodiment, the upper cushion 31a is divided into a lower cushion 31b, the upper cushion 31a is configured to be detachable from the lower cushion 31b, and the upper cushion 31a is placed on the lower cushion 31b. The thickness of both the seat cushions 28 and 31 is set so that the upper surface of the seat cushion 28 is in the same height as the seat cushion 28 of the first rear row seat 5 installed on the side portion 9 of the first floor panel. May be.

  In the case where a part of the seat cushion 31 of the second rear row seat 6, that is, the upper cushion 31a is configured to be detachable from the lower cushion 31b as in the third embodiment, the upper cushion 31a is replaced with the lower cushion 31b. The rear row seats 5 and 6 can be used as the loading portion for the long object M by attaching the upper surface and making the upper surface thereof the same height as the seat cushion 28 of the first rear row seat 5. When a tall person sits on the second rear seat 6, the upper cushion 31a is removed from the lower cushion 31b to lower the upper surface height of the seat cushion 31, as shown in FIG. There is an advantage that it is possible to prevent the interval between the head and the ceiling of the tall person from becoming narrow.

  In particular, when the upper cushion 31a removed from the second rear row seat 6 is configured to be mounted on the seat cushion 28 of the first rear row seat 5 as shown in FIG. 11, the upper cushion 31a is stored. It is possible to hold the upper cushion 31a on the seat cushion 28 without providing a special space for doing so, so that the structure of the vehicle can be prevented from being complicated and the upper cushion 31a can be stored. There is an advantage that the work can be facilitated.

  Further, as in the fourth embodiment shown in FIG. 12, the entire seat cushion 31 of the second rear row seat 6 is configured to be detachable from the second floor panel side portion 10. In the state attached on the floor panel side part 10, as shown by the phantom line of FIG. 12, you may comprise so that the upper surface and the seat cushion 28 of the 1st back row seat 5 may become the same height. When configured in this manner, an occupant can be seated on the second rear row seat 6 with the seat cushion 31 mounted, and the seat cushions 28, 31 of the first and second rear row seats 5, 6 can be used. It is also possible to place a long luggage on top. Then, by removing the seat cushion 31 from the second floor panel side portion 10, there is an advantage that the installation portion of the second rear row seat 6 can be used as a placement portion for the tall luggage N.

  Instead of the above embodiment in which an intermediate cross member 45 extending in the vehicle width direction is provided between the vehicular auxiliary machine composed of the fuel tank 11 and the first floor panel side portion 9, FIGS. As shown in the fifth embodiment, the vehicle functional unit including the traveling wind guide unit that guides the traveling wind toward the differential 17 disposed on the rear side of the vehicle auxiliary device including the fuel tank 11 is provided as described above. It is good also as a structure provided between the auxiliary machine for vehicles (fuel tank 11) and the 1st floor panel side part 10. FIG. In other words, in the fifth embodiment, the vehicle functional unit including the guide groove 51 that is inclined obliquely toward the center so that the rear end portion is directed to the installation unit of the differential 17 on the front surface and the upper surface of the first tank unit 42. Is provided.

  When configured as described above, the traveling wind S supplied to the front portion of the first tank portion 42 via the tunnel-shaped wind guide plate 52 provided on the lower surface of the front portion of the first kick-up portion 18. Can be guided to the installation portion of the differential 17 by the guide groove 51, so that there is an advantage that it is possible to effectively prevent the occurrence of the heat damage by suppressing the temperature rise of the differential 17 with a simple configuration. In particular, as shown in FIG. 15, in a vehicle having a cylindrical reinforcing frame 14a surrounding the propeller shaft 12, high-temperature air is supplied to the installation portion of the differential 17 through the reinforcing frame 14a. Therefore, since the differential 17 tends to be easily heated, there is an advantage that the effect is remarkably obtained by adopting the above configuration.

  In addition, a traveling wind guide duct is connected to the rear end portion of the air guide plate 52, and the traveling wind guide duct is installed along the guide groove 51 of the fuel tank 11. It is good also as a structure fixed to the back surface and the lower surface of the 1st floor panel side part 9. FIG. When configured in this manner, the traveling wind supplied to the front portion of the first tank portion 52 and introduced into the traveling wind guide duct is efficiently passed to the installation portion of the differential 17 without leaking outside. Since it can supply, there exists an advantage that the temperature rise of this differential 17 can be suppressed effectively.

1 is a side view showing a first embodiment of a lower body structure of a vehicle according to the present invention. It is a top view which shows embodiment of the said lower vehicle body structure. It is front sectional drawing which shows the installation state of a back row sheet | seat. It is side surface sectional drawing which shows the specific structure of a 1st back row sheet | seat. It is side surface sectional drawing which shows the specific structure of a 2nd back row sheet | seat. It is a disassembled perspective view which shows the specific structure of a reclining mechanism. It is explanatory drawing which shows the state which looked at the installation part of the fuel tank from the upper surface. It is explanatory drawing which shows the state in which the passenger | crew sat down to the back row seat. FIG. 6 is a view corresponding to FIG. 5 showing a second embodiment of the lower body structure of the vehicle according to the present invention. FIG. 6 is a view corresponding to FIG. 3 showing a third embodiment of the lower body structure of the vehicle according to the present invention. It is explanatory drawing which shows the state which installed the upper cushion on the 1st back row seat. FIG. 6 is a view corresponding to FIG. 3 showing a fourth embodiment of the lower body structure of the vehicle according to the present invention. FIG. 6 is a view corresponding to FIG. 5 showing a fifth embodiment of a lower body structure of a vehicle according to the invention. FIG. 8 is a view corresponding to FIG. 7 showing a fifth embodiment of the lower body structure. FIG. 6 is a view corresponding to FIG. 3 showing a fifth embodiment of the lower body structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car compartment 2 Floor panel 3 Driver's seat 4 Passenger seat 5 1st back row seat 6 2nd back row seat 8 Tunnel part 9 1st floor panel side part 10 2nd floor panel side part 11 Fuel tank 45 Intermediate | middle cross member 51 Guide groove

Claims (9)

  In a vehicle in which a pair of left and right front row seats composed of a driver seat and a passenger seat are arranged side by side on a floor panel of a passenger compartment, and a pair of left and right rear row seats are arranged side by side behind the front row seat, the vehicle of the floor panel A tunnel portion projecting toward the vehicle interior side is installed at the center in the width direction so as to extend in the vehicle front-rear direction. On one side of the tunnel portion in the vehicle width direction, an installation portion for the first rear row seat and The first floor panel side portion is disposed, and on the other side in the vehicle width direction of the tunnel portion, the second floor panel side portion serving as the installation portion of the second rear row seat is the first floor panel side portion. And a vehicle auxiliary device is disposed at least below the first floor panel side portion, and the vehicle functional unit is provided between the vehicle auxiliary device and the first floor panel side portion. With the feature that The lower body structure of a vehicle that.   2. The lower body structure of a vehicle according to claim 1, wherein a vehicle functional unit comprising a cross member extending in the vehicle width direction is provided between the vehicle auxiliary device and the first floor panel side portion. .   The vehicle according to claim 2, wherein a rear side frame extending in a front-rear direction of a vehicle body is installed on both left and right sides of the floor panel, and the cross member is installed from the rear side frame toward the tunnel portion. Lower body structure.   The vehicle lower body structure according to claim 2 or 3, wherein the vehicular accessory is a fuel tank, and a recess corresponding to the cross member is formed on an upper surface thereof.   5. The vehicle auxiliary device smaller than the vehicle auxiliary device below the first floor panel side portion is disposed below the second floor panel side portion. 6. 2. A lower body structure of a vehicle according to item 1.   The vehicle according to any one of claims 1 to 5, wherein the first rear row seat disposed on the side portion of the first floor panel is formed to be smaller than the second rear row seat. Lower body structure.   The lower part of the vehicle according to claim 6, wherein a first floor panel side portion is disposed on the rear side of the driver seat, and a second floor panel side portion is disposed on the rear side of the passenger seat. Body structure.   A vehicle functional unit comprising a traveling wind guide for guiding the traveling wind toward the differential disposed on the rear side of the vehicle accessory is provided between the vehicle accessory and the first floor panel side portion. The lower body structure of a vehicle according to claim 1, wherein   The vehicle lower body structure according to claim 8, wherein the vehicle auxiliary machine is a fuel tank, and a guide groove constituting the traveling wind guide portion is formed on an upper surface thereof.

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