JP2008105536A - Lower bodywork of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lower bodywork of a vehicle capable of adequately assuring the rigidity of a vehicle body with a simple configuration. <P>SOLUTION: This lower bodywork of the vehicle is provided with a floor panel F forming the bottom part of a vehicle compartment, a seat rail (9) arranged along this floor panel F to be extended in the longitudinal direction of the vehicle body, and a seat for an occupant slidably supported along this seat rail (9). A floor frame 41 extended along the floor panel F in the longitudinal direction of the vehicle body is arranged throughout the range extending from the front part of the floor panel F to the intermediate part in the longitudinal direction. Moreover, the seat rail (9) is arranged to be extended to the rear side of the vehicle body consecutively with the rear end part of the floor frame 41 in a plan view. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a floor panel that forms the bottom of a passenger compartment, a seat rail that is installed so as to extend in the longitudinal direction of the vehicle body along the floor panel, and a passenger that is slidably supported along the seat rail. The present invention relates to a lower body structure of a vehicle including a seat.

Conventionally, as shown in the following Patent Document 1, a pair of left and right seat rails is provided so as to extend in the front-rear direction of the vehicle body along the floor panel, and the first rear seat and the second rear seat are formed along the seat rail. 2. Description of the Related Art There is known a vehicle configured such that a plurality of rows of occupant seats are slidably supported so that the arrangement pattern of the occupant seats can be variously changed.
JP 2003-146120 A

  By the way, a floor frame extending in the longitudinal direction of the vehicle body is often installed on the floor panel as a reinforcing member. In particular, as in Patent Document 1, when a wide space is provided at the rear of the passenger compartment so that the occupant seats can be arranged in various patterns, the running stability of the vehicle is maintained well. For these reasons, it is desired that the vehicle body is sufficiently reinforced by the floor frame to ensure high vehicle body rigidity. As a measure for this, for example, it is conceivable to install the floor frame over a wide range in the longitudinal direction of the vehicle body.

  However, when the floor frame is installed over a wide range as described above, there is a problem that the weight of the vehicle body is increased and the cost is increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a lower vehicle body structure of a vehicle that can sufficiently ensure the rigidity of the vehicle body with a simple configuration.

  In order to solve the above problems, the present invention provides a floor panel that forms the bottom of a passenger compartment, a seat rail that extends in the front-rear direction of the vehicle body along the floor panel, and the seat rail. A vehicle lower body structure including an occupant seat slidably supported along the floor panel, wherein the floor panel includes a floor frame extending in the front-rear direction of the vehicle body and extending in the front-rear direction from the front portion of the floor panel. The seat rail is installed so as to extend to the rear side of the vehicle body continuously with the rear end of the floor frame in plan view. (Claim 1).

  According to the present invention, the floor frame extending in the front-rear direction of the vehicle body along the floor panel is installed over a range from the front part of the floor panel to the middle part in the front-rear direction, and the rear part of the floor frame is viewed in plan view. Since the seat rail that extends to the rear side of the vehicle body is installed so as to be continuous with the end and this seat rail is used as a reinforcing member, the front and back length of the floor frame is shortened to reduce the vehicle weight and manufacturing cost. However, the rigidity of the vehicle body can be improved easily and effectively.

  In the said structure, it is preferable that the rear-end part of the said floor frame and the front-end part of a seat rail are connected (Claim 2).

  In this way, since the load is transmitted with high efficiency from the floor frame to the seat rail (or from the seat rail to the floor frame), the longitudinal load input to the vehicle body can be more efficiently distributed and supported. The rigidity of the vehicle body can be improved more effectively.

  In this case, the floor frame is installed on the lower surface side of the floor panel and the seat rail is installed on the upper surface side of the floor panel, and between the rear end portion of the floor frame and the front end portion of the seat rail, It is preferable that a bracket for connecting the two to each other is provided.

  In this way, when the rear end portion of the floor frame installed on the lower surface side of the floor panel and the front end portion of the seat rail installed on the upper surface side of the floor panel are connected via the bracket, While preventing the structure such as the floor frame from projecting to the upper surface side of the floor panel and obstructing the interior space of the vehicle, bracket the floor frame and the seat rail installed on the opposite side across the floor panel. By connecting via, there exists an advantage that the reinforcement structure over the wide range of the front-back direction of a vehicle body can be formed easily.

  It is preferable that a cross member extending in the vehicle width direction is installed on the floor panel, and the seat rail is connected to the cross member.

  In this way, the load input to the vehicle body can be efficiently distributed and supported in the vehicle front-rear and left-right directions via the seat rail extending in the vehicle front-rear direction and the cross member extending in the vehicle width direction. The vehicle body rigidity can be further effectively improved.

  Further, in the present invention, the seat rail and the floor frame are respectively provided at two left and right locations on the floor panel inward in the vehicle width direction and extend to the vicinity of the rear end of the vehicle body on the floor panel. A pair of left and right outer seat rails are arranged so as to be positioned on the outer side in the vehicle width direction with respect to the seat rail, and are arranged for a plurality of passengers arranged in the front and rear along the seat rail and the outer seat rail. It is preferable that the sheet is slidably supported (claim 5).

  As described above, a plurality of front and rear seats are arranged along the seat rails provided at the left and right two locations on the inner side in the vehicle width direction of the floor panel and the pair of left and right outer seat rails disposed on the outer side. When the occupant seats in the row are slidably supported, various arrangement patterns of the seats can be obtained, and the vehicle body can be effectively reinforced over a wide range by effectively using the outer seat rail. There is.

  In this case, it is preferable that a bench seat type occupant seat provided with an integral seat cushion extending in the vehicle width direction is slidably supported along the outer seat rail.

  In this way, the bench seat type passenger seat can be moved over a wide range in the front-rear direction of the vehicle body along the outer seat rail, and there is an advantage that more various seat arrangement patterns can be realized. .

  Further, a separate type passenger seat divided into left and right is disposed on the front side of the bench seat type passenger seat, and the left and right divided seats constituting the separate type passenger seat are adjacent to each other. It is preferable that the first and second seat rails are slidably supported along the seat rail and the outer seat rail.

  As described above, a separate type occupant seat is disposed on the front side of the bench seat type occupant seat, and the left and right divided seats constituting the seat are slid along the seat rail and the outer seat rail. When supported freely, there is an advantage that more various sheet arrangement patterns can be obtained.

  As described above, according to the lower vehicle body structure of the vehicle of the present invention, the rigidity of the vehicle body can be sufficiently secured with a simple configuration.

  1 to 3 show an embodiment of a vehicle lower body structure according to the present invention. A middle row of occupant seats 2 including a right seat 2a and a left seat 2b, which are independent of each other, is disposed at the center in the front-rear direction on the floor panel F that forms the bottom of the passenger compartment of the vehicle. A rear row passenger seat 3 of a so-called bench seat type having an integral seat cushion extending in the vehicle width direction is disposed on the side. A front row passenger seat 1 including a driver seat 1a and a passenger seat 1b is disposed on the front side of the middle row passenger seat 2.

  FIG. 4 shows a state in which the floor panel F is viewed from above with the passenger seats 1 to 3 being removed. As shown in FIG. 4 and FIGS. 2 and 3 above, a pair of left and right rear side frames 4 and 4 extending in the front-rear direction at the left and right outer portions are provided on the lower surface of the floor panel F. It is installed over the range from the direction middle part to the rear end part. Similarly, on the lower surface of the floor panel F, a pair of left and right floor frames 41, 41 extending in the front-rear direction at two left and right positions inward in the vehicle width direction are provided from the front part of the floor panel F to the middle part in the front-rear direction. It is installed over a wide range.

  Further, as shown in FIGS. 1 and 4, a rear wheel house 5 bulging toward the vehicle interior side is provided at a side portion of the rear vehicle body, and a side sill extending in the front-rear direction of the vehicle body is provided on the front side thereof. 6 is installed. In addition, a spare tire pan 7 in which a spare tire (not shown) or a battery is accommodated is formed in the rear portion of the floor panel F so as to be recessed downward.

  On the floor panel F, a pair of left and right inner rails 9, 9 (corresponding to seat rails according to the present invention) extending in the front-rear direction at two left and right positions closer to the inside in the vehicle width direction, and the inner rails 9, 9 On the other hand, a pair of left and right outer rails 8 and 8 (corresponding to the outer seat rails according to the present invention) located on the outer side in the vehicle width direction are installed. Of these, the outer rails 8, 8 extend from the front-rear direction intermediate portion of the vehicle body close to the rear end portion of the front passenger seat 1 to the vehicle rear end portion. On the other hand, the inner rails 9, 9 are set shorter than the outer rails 8, and from the position overlapping the rear end portions of the floor frames 41, 41 in plan view, near the installation portion of the spare tire pan 7. It is extended to. That is, the inner rails 9 and 9 are installed so as to extend to the rear side of the vehicle body continuously with the rear ends of the floor frames 41 and 41.

  As shown in FIGS. 5 and 6, the outer rail 8 and the inner rail 9 are made of channel steel having a C-shaped cross section having a predetermined strength with an upper surface opened. Also, as shown in FIGS. 2 and 3, the outer rail 8 and the inner rail 9 are installed in a state of being inclined rearward so that the distance from the floor panel F installed substantially horizontally is increased. It is set to increase as it goes backward. Along the outer rail 8 and the inner rail 9, the occupant seats 2 and 3 in the middle row and the rear row are slidably supported over a predetermined range in the front-rear direction (see FIG. 1). Specifically, the right seat 2a constituting the passenger seat 2 in the middle row is slidably supported along the outer rail 8 on the right side of the vehicle body and the inner rail 9 adjacent thereto, and the left seat 2b is A rear row passenger seat 3 is supported so as to be slidable along a pair of left and right outer rails 8, 8. .

  As shown in FIGS. 2 and 4, a rear bumper 10 is installed at the rear end of the vehicle body, and a rear end of the outer rail 8 is disposed above the bumper reinforcement 11 constituting the rear bumper 10. A mounting plate 8a provided on the portion is fixed via a mounting bolt.

  As shown in FIGS. 5 and 6, the rear side frame 4 includes a frame body 4a having a U-shaped cross section with an open top surface, and flanges 4b and 4b protruding from upper end portions of the inner side portion and the outer side portion. And is installed so as to extend in the front-rear direction of the vehicle body along the lower surface of the floor panel F at a side position corresponding to the installation portion of the outer rail 8. Further, as shown in FIG. 2, the rear end portion of the rear side frame 4 is joined to the lower portion of the bumper reinforcement 11 so as to be lower than the rear end portion of the outer rail 8 by a predetermined distance S. It arrange | positions so that it may be located in.

  The floor frame 41 has a cross-sectional shape similar to that of the rear side frame 4, and as shown in FIGS. 5 and 7, a U-shaped cross-sectional frame main body 41a, and inner and outer side portions thereof. And flanges 41b and 41b projecting from the upper end of each. And the rear-end part of this floor frame 41 and the front-end part of the said inner rail 9 are connected via the bracket 42 shown in FIG.3, FIG.4, FIG.7.

  As shown in FIG. 7, the bracket 42 penetrates the floor panel F across a pair of left and right upper members 43, 43 installed on the upper side of the floor panel F and the upper and lower sides of the floor panel F. And a pair of left and right lower members 44, 44 installed on the left and right sides. Of these members, the upper member 43 includes a first vertical wall portion 45 formed at an upper end portion thereof and extending in a vertical direction, a horizontal wall portion 46 extending substantially horizontally from a lower end portion of the first vertical wall portion 45, and the horizontal wall portion. 46 and a second vertical wall 47 extending downward from the outer end of 46. On the other hand, the lower member 44 extends in the vertical direction (through the floor panel F) while being inserted through the slit 54 formed in the floor panel F, and the first vertical wall portion 48. And a second vertical wall portion 50 extending downward from the inner end portion of the horizontal wall portion 49. The first vertical wall portion 45 of the upper member 43 is fixed to the left and right side surfaces of the inner rail 9 by welding or the like, and the second vertical wall portion 50 of the lower member 44 is fixed to the left and right side surfaces of the floor frame 41. The floor panel F is fixed by the fixing bolt 52 and the second vertical wall portion 47 of the upper member 43 and the first vertical wall portion 48 of the lower member 44 are connected via the mounting bolt 51. The floor frame 41 and the inner rail 9 installed on the opposite sides of the upper and lower sides are connected via a bracket 42.

  As shown in FIGS. 4 and 6, on the left and right sides of the spare tire pan 7, at the position close to the installation portion of the spare tire pan 7, the vehicle interior side vertical wall 5a of the rear wheel house 5 is provided. And a reinforcing gusset member 12 that connects the interior side surface (upper surface) of the floor panel F to the reinforcing gusset member 12, and the outer rail 8 is attached to the reinforcing gusset member 12. As shown in FIGS. 6 and 8, the reinforcing gusset member 12 includes an upper flange 17 joined to the vehicle interior side vertical wall portion 5a of the rear wheel house 5, and an upper portion extending from the lower end portion to the inward side of the vehicle body. A wall portion 18, a rail installation step portion 19 provided at the vehicle interior side portion, a side wall portion 20 extending downward from the inner end portion, and an inner flange projecting from the lower end portion toward the vehicle inner side 21, front and rear vertical wall portions 22 installed so as to cover the front and rear surfaces of the upper wall portion 18 and the side wall portion 20, and a lower flange 23 projecting from the lower end portion of the vertical wall portion 22. is doing.

  And the upper flange 17 of the said reinforcement gusset member 12 is fixed to the vehicle interior side vertical wall part 5a of the rear wheel house 5 via the attachment bolt 24, and the said inner side flange 21 is spared via the attachment bolt 25. It is fixed to a predetermined portion of the floor panel F adjacent to the installation portion of the tire pan 7 and the flange 4b on the inner side of the rear side frame 4, and the lower flange 23 is fixed to the outer end of the floor panel F via a mounting bolt 26. As a result, the vehicle interior side vertical wall 5a of the rear wheel house 5 and the vehicle interior side surface (upper surface) of the floor panel F are connected via the reinforcing gusset member 12. In addition, the outer rail 8 is placed on the stepped portion 19 of the reinforcing gusset member 12 and fixed to the reinforcing gusset member 12 by means such as bolting or welding, so that the outer rail 8 is installed in a state inclined rearward. A reinforcing gusset member 12 is arranged between the outer rail 8 and the floor panel F installed substantially horizontally.

  2 to 4 below the portions near the front end portions of the outer rail 8 and the inner rail 9 and the portions located on the rear side by a predetermined distance from the front end portions of the outer rail 8 and the inner rail 9. As shown, no. No. 3 cross member 13, that is, the third cross member counted from the front side of the vehicle body, The four cross members 14, that is, the fourth cross member counted from the front side of the vehicle body, are installed so as to extend in the vehicle width direction along the vehicle interior side surface (upper surface) of the floor panel F, respectively. This No. 3, No. Rail brackets 15 and 16 are installed on the front side of the four cross members 13 and 14, respectively, and the vicinity of the front end portions of the outer rail 8 and the inner rail 9 via the rail brackets 15 and 16 and the rear side thereof by a predetermined distance. Of the above-mentioned No .. 3, No. The four cross members 13 and 14 are connected to each other.

  The vicinity of the front end portions of the outer rail 8 and the inner rail 9 is No. As shown in FIG. 9, the rail bracket 15 connected to the three cross members 13 includes an upper wall portion 28 formed in a trapezoidal shape whose rear end portion is widened rearward, and a side wall portion 29 extending downward from the left and right side portions thereof. And a rear flange 30 provided at the rear end portion, a lower flange 31 provided at the lower end portion of the side wall portion 29, and a front wall portion 32 installed so as to cover the front surfaces of the left and right side wall portions 29. The outer rail 8 and the inner rail 9 are fixed to the upper wall portion 28 of the rail bracket 15 by means such as bottle stopping or welding.

  The rear flange 30 of the rail bracket 15 is No. The three cross members 13 are fixed to the front wall surface of the cross panel 13 via mounting bolts 33, and the lower flange 31 is fixed to the upper surface of the floor panel F via mounting bolts 34. A part near the front end is connected to the No. 3 connected to the cross member 13. In addition, the center part of the said outer rail 8 and the inner rail 9 is No .. Since the rail bracket 16 connected to the four cross member 13 has the same configuration as the rail bracket 15, the description thereof is omitted.

  As shown in FIGS. 3, 4, and 10, a bottom wall portion 36 fixed to a top surface of the floor panel F via a mounting bolt 35 is provided at a predetermined portion in the vicinity of the front end portion of the spare tire pan 7. A support bracket 38 having a pair of front and rear vertical wall portions 37 is installed, and the support bracket 38 is configured to support the vicinity of the rear end portion of the inner rail 9. Further, as shown in FIGS. 10 and 11, a lower surface side cross member 39 extending in the vehicle width direction is installed on the lower surface side of the floor panel F adjacent to the front end portion of the spare tire pan 7.

  The lower surface side cross member 39 includes a tire pan corresponding portion 39a disposed along a predetermined range in the vehicle width direction including the peripheral edge of the front side of the spare tire pan 7, and left and right ends of the tire pan corresponding portion 39a. A laterally extending portion 39 b extending outward in the vehicle width direction is provided, and both left and right end portions thereof are joined to the vehicle interior side wall surface of the rear side frame 4. In addition, a reinforcing plate 40 is installed on the front side of the lower surface side cross member 39 and the rear end portion of the inner rails 9 and 9 is attached. The support bracket 38 is attached to the reinforcing plate 40 with the mounting bolt 35. It is fixed by. Further, a front flange 39c (see FIG. 10) of the lower surface side cross member 39 is joined to the lower surface of the rear side of the reinforcing plate 40.

  The floor panel F that forms the bottom of the passenger compartment as described above, the outer rail 8 that is installed over the wide range in the front-rear direction of the vehicle body along the floor panel F, and the front and rear relative to the outer rail 8 In the vehicle having the inner rail 9 having a short length, the outer rail 8 and the inner rail 9 are installed in a rear-upward inclined state, and the passenger seats in the middle row and the rear row are arranged along the outer rail 8 and the inner rail 9. According to the above configuration in which the slides 2 and 3 are slidably supported, there are advantages that various arrangement patterns of the seats can be obtained and a comfortable living space in the vehicle interior can be obtained.

  For example, as shown in FIGS. 12 and 13, in a so-called panoramic roof type vehicle in which a windshield 56 and a roof glass 57 are continuously installed on the front surface of the passenger compartment and the front portion of the roof portion, as described above. When the outer rail 8 and the inner rail 9 are installed in a rear-upward inclined state, the middle row located on the rear side compared to the installation height H1 of the front row passenger seat 1 including the driver's seat and the passenger seat By sequentially setting the installation heights H2 and H3 of the occupant seat 2 and the rear row occupant seat 3, the field of view of the occupants seated on the middle row and the rear row occupant seats 2, 3, ie, the windshield 56 and It is possible to secure a sufficient field of view when the outside is visually recognized through the roof glass 57 or the like.

  The middle row passenger seat 2 is slid to a position close to the front row occupant seat 1 and the rear row occupant seat 3 is slid to the rearmost portion, so that the rear row occupant seat 3 is A wide space can be secured in the front part of the seated passenger. Furthermore, in order to secure a wide space in the front part of the occupant seated on the occupant seat 2 in the middle row, the occupant seats 2 and 3 in the middle row and the rear row are each slid rearward, etc. There is an advantage that an arrangement pattern can be obtained.

  Then, a floor frame 41 extending in the front-rear direction of the vehicle body along the floor panel F is installed over a range from the front portion of the floor panel F to the middle portion in the front-rear direction, and the rear of the floor frame 41 in plan view. Since the inner rail 9 is installed so as to extend to the rear side of the vehicle body continuously with the end portion and the inner rail 9 is used as a reinforcing member, the front and rear length of the floor frame 41 is shortened to reduce the vehicle body weight and There is an advantage that the rigidity of the vehicle body can be easily and effectively improved while reducing the manufacturing cost.

  That is, the inner rail 9 has a predetermined rigidity so that the passenger seat 2 can be stably supported, and the inner rail 9 is connected to the floor frame 41 for reinforcing the floor panel F in the front-rear direction. Since the inner rail 9 can be effectively used as a reinforcing member, the floor frame 41 is installed only in a predetermined region of the floor panel F on the front side of the installation portion of the inner rail 9. As a result, the rigidity of the floor panel F and its peripheral members can be effectively improved. Accordingly, it is possible to effectively improve the rigidity of the vehicle body while preventing an increase in the vehicle body weight, manufacturing cost, etc. For example, a large impact load input to the rear part of the vehicle body at the time of a rear collision of the vehicle It can be distributed and supported efficiently by transmitting to each part of the vehicle body via the floor frame 41. As a result, it is possible to effectively prevent the vehicle body from being greatly deformed in response to the impact load, and the vehicle body is deformed by a load input from the rear suspension or the like when the vehicle is traveling, and the traveling stability is impaired accordingly. There is an advantage that it can be effectively prevented.

  In particular, when the rear end portion of the floor frame 41 and the front end portion of the inner rail 9 are connected (via the bracket 42) as in the above embodiment, the floor frame 41 is connected to the inner rail 9. Since the load is transmitted with high efficiency (or from the inner rail 9 to the floor frame 41), the load in the front-rear direction input to the vehicle body can be distributed and supported more efficiently, and the rigidity of the vehicle body can be improved more effectively. There is an advantage that can be made.

  Further, as in the above embodiment, the rear end portion of the floor frame 41 installed on the lower surface side of the floor panel F and the front end portion of the inner rail 9 installed on the upper surface side of the floor panel F are connected via the bracket 42. When the connection is made, the structure such as the floor frame 41 protrudes to the upper surface side of the floor panel F and prevents the vehicle interior space from being obstructed, while the floor panel F is sandwiched between the upper and lower sides. By connecting the floor frame 41 and the inner rail 9 installed in the vehicle via the bracket 42, there is an advantage that a reinforcing structure over a wide range in the front-rear direction of the vehicle body can be easily formed.

  Further, as in the above-described embodiment, a pair of left and right outer rails 8 having a relatively long front and rear length are provided on the outer sides of the inner rails 9 and 9 provided at two locations on the floor panel F inward in the vehicle width direction. , 8 and a plurality of rows of occupant seats 2 and 3 arranged back and forth along the outer rail 8 and the inner rail 9 are slidably supported, various seat arrangement patterns can be obtained. In addition, there is an advantage that the vehicle body can be effectively reinforced over a wide range by effectively using the outer rail 8 which is long in the front and rear direction.

  Further, as in the above embodiment, a bench seat type passenger seat 3 having an integral seat cushion extending in the vehicle width direction is provided as a rear row seat, and the passenger seat 3 is provided along the outer rail 8 that is long in the front and rear direction. Is slidably supported, the bench seat type passenger seat can be moved over a wide range in the front-rear direction of the vehicle body, and there is an advantage that a wider variety of seat arrangement patterns can be realized.

  As with the rear row passenger seat 3, the middle row passenger seat 2 can be configured as a bench seat type. However, as shown in the embodiment, the right seat 2a is divided into left and right sides. The middle-row occupant seat 2 is provided as a separate-type seat composed of the left-side seat 2b, and the right-side seat 2a and the left-side seat 2b constituting the separate-type occupant seat 2 are respectively connected to the outer rails 8 adjacent to each other. In addition, when supported individually and slidably along the inner rail 9, there is an advantage that various arrangement patterns of the sheets can be obtained by changing the front and rear positions of the right seat 2a and the left seat 2b.

  In addition, as in the above-described embodiment, No. 2 extending in the vehicle width direction. 3 and no. 4 When the cross members 13 and 14 are installed on the floor panel F and the outer rail 8 and the inner rail 9 are connected to the cross members 13 and 14 (via rail brackets 15 and 16), Through the outer and inner rails 8 and 9 extending in the longitudinal direction of the vehicle body and the cross members 13 and 14 extending in the vehicle width direction, the load input to the vehicle body is efficiently dispersed in the vehicle longitudinal and lateral directions. There is an advantage that the vehicle body rigidity can be improved more effectively.

  Further, as in the above-described embodiment, the vehicle interior side vertical wall portion 5a of the rear wheel house 5 that bulges from the vehicle body side wall portion toward the vehicle interior side at both ends in the vehicle width direction of the floor panel F, and the floor panel F In the case where a reinforcing gusset member 12 is provided for connecting the vehicle interior side surface (upper surface) and the outer rail 8 is connected to the highly rigid rear wheel house 5 via the reinforcing gusset member 12, the outer rail 8 has the advantage that the reinforcing effect of the vehicle body can be further enhanced, and the rigidity of the vehicle body can be further effectively improved.

  Further, when the outer rail 8 is extended to the installation portion of the rear bumper 10 as in the above-described embodiment, the impact load input to the rear bumper 10 is applied to the outer rail 8 at the time of a rear collision of the vehicle. Therefore, there is an advantage that deformation of the vehicle body can be effectively prevented. In particular, as shown in the above-described embodiment, the rear end portion of the outer rail 8 is fixed to the upper portion of the bumper reinforcement 11 constituting the rear bumper 10, and at the position corresponding to the installation portion of the outer rail 8. By joining the rear end portion of the rear side frame 4 installed so as to extend in the front-rear direction of the vehicle body along the lower surface of the panel F, the rear end portion of the outer rail 8 is joined to the lower portion of the bumper reinforcement 11. When the vehicle is installed so as to be positioned on the lower side by a predetermined distance S, the outer rail 8 and the rear side frame 4 form a three-dimensional reinforcing structure extending in the front-rear direction of the vehicle body. There is an advantage that it is possible to more stably support the impact load input to the like.

  In the above embodiment, the rear end portion of the floor frame 41 and the front end portion of the inner rail 9 are connected via the bracket 42. However, the floor frame 41 and the inner rail 9 are continuous in the front-rear direction. If it is installed in a state (if the rear end portion of the floor frame 41 and the front end portion of the inner rail 9 are close to each other), the floor frame 41 and the inner rail 9 are connected to the bolt (via the floor panel F). For example, the connection may be made directly, or the connection between the two may be omitted. When the connection portion between the two is omitted, the vehicle body reinforcement effect is relatively lowered, but there is an advantage that the vehicle body rigidity can be improved at a lower cost.

It is a top view which shows embodiment of the lower vehicle body structure of the vehicle which concerns on this invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is a top view which shows the upper structure of a floor panel. It is sectional drawing along the VV line of FIG. It is sectional drawing along the VI-VI line of FIG. It is sectional drawing along the VII-VII line of FIG. It is a perspective view which shows the structure of a reinforcement gusset member. It is a perspective view which shows the structure of a rail bracket. FIG. 5 is a cross-sectional view taken along line XX in FIG. 4. It is a bottom view of a floor panel. 1 is an external view of a vehicle having a lower vehicle body structure according to the present invention. It is explanatory drawing of the vehicle which has the lower vehicle body structure which concerns on this invention.

Explanation of symbols

2,3 Crew seat 8 Outer rail (outer seat rail)
9 Inner rail (seat rail)
13, 14 Cross member 41 Floor frame 42 Bracket F Floor panel

Claims (7)

A floor panel forming the bottom of the passenger compartment, a seat rail installed so as to extend in the front-rear direction of the vehicle body along the floor panel, and an occupant seat supported slidably along the seat rail The lower body structure of the vehicle
In the floor panel, a floor frame extending in the front-rear direction of the vehicle body is installed over a range from the front part of the floor panel to the middle part in the front-rear direction,
The lower body structure of a vehicle, wherein the seat rail is installed so as to extend to the rear side of the vehicle body in a plan view and continuously with the rear end portion of the floor frame. In the lower body structure of the vehicle according to claim 1,
A lower body structure of a vehicle, wherein a rear end portion of the floor frame and a front end portion of a seat rail are connected. In the lower vehicle body structure of the vehicle according to claim 2,
The floor frame is installed on the lower surface side of the floor panel and the seat rail is installed on the upper surface side of the floor panel, and they are coupled to each other between the rear end portion of the floor frame and the front end portion of the seat rail. A lower body structure of a vehicle, characterized in that a bracket is provided. The lower body structure of the vehicle according to any one of claims 1 to 3,
A lower vehicle body structure for a vehicle, wherein a cross member extending in a vehicle width direction is installed on the floor panel, and the seat rail is connected to the cross member. In the lower body structure of a vehicle according to any one of claims 1 to 4,
The seat rail and the floor frame are respectively provided at two locations on the left and right sides of the floor panel closer to the inside in the vehicle width direction,
On the floor panel, a pair of left and right outer seat rails extending to the vicinity of the rear end of the vehicle body are disposed so as to be positioned on the outer side in the vehicle width direction than the seat rails.
A lower body structure of a vehicle, wherein a plurality of rows of passenger seats arranged in the front-rear direction are slidably supported along the seat rail and the outer seat rail. In the vehicle lower body structure according to claim 5,
A lower body structure of a vehicle, wherein a bench seat type occupant seat having an integral seat cushion extending in a vehicle width direction is slidably supported along the outer seat rail. The vehicle lower body structure according to claim 6,
A separate type passenger seat divided into left and right is disposed on the front side of the bench seat type passenger seat, and the left and right divided seats constituting the separate type passenger seat are adjacent to each other. A lower vehicle body structure for a vehicle, wherein the lower vehicle body structure is slidably supported along a seat rail and an outer seat rail.

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