JP2008001148A - Lower structure of car body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the lower structure of a car body capable of effectively utilizing a space under a seat cushion. <P>SOLUTION: The lower structure 10 of the car body comprises a seat frame 18 for supporting a vehicular seat 12 in relation to the car body, and a floor panel 32 assembled in a lower side of the seat frame 18 in the vertical direction of the car body. The floor panel 32 is locked with a cross frame 20 and a lower frame 25 respectively structuring the seat frame 18, and forms a space R opened upward under the seat cushion 14 of the vehicular seat 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle body lower structure in which a space is formed below a seat cushion.

There is known a structure in which a seat under tray support member for guiding a seat under tray is fixed to a seat cushion frame (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 5-26647

  However, in the conventional techniques as described above, there is room for improvement in effectively using the space below the seat cushion.

  An object of the present invention is to obtain a vehicle body lower structure that can effectively use a space below a seat cushion.

  In order to achieve the above object, a vehicle body lower structure according to claim 1 is assembled to a seat frame for supporting a vehicle seat with respect to the vehicle body, and a lower side of the seat frame in the vehicle body vertical direction. And a floor panel in which a space is formed below the seat in the vertical direction of the vehicle body.

  In the vehicle body lower part structure according to the first aspect, the floor panel is assembled to a seat frame that supports the vehicle seat with respect to the vehicle body to form a space below the seat cushion. Since the floor panel forms a space in this way, it is possible to obtain a large space below the vehicle seat.

  Thus, in the vehicle body lower structure according to the first aspect, the space below the seat cushion can be used effectively. And since the floor panel is assembled | attached to the seat frame, in other words, since the seat frame and the floor panel are modularized, the support structure to the vehicle body is simple.

  A vehicle body lower structure according to a second aspect of the present invention is the vehicle body lower structure according to the first aspect, wherein the seat frame is fixed to the vehicle body skeleton.

  In the vehicle body lower structure according to the second aspect, the seat frame is directly fixed to the vehicle body skeleton and supported by the vehicle body, so that the assembly (support) structure of the floor panel to the seat frame can be simplified. Further, the floor panel can be made of a resin material or the like.

  The vehicle body lower structure according to a third aspect of the invention is the vehicle body lower structure according to the first or second aspect, wherein the floor panel faces upward on the rear side in the vehicle longitudinal direction with respect to the seat cushion of the vehicle seat. The open space is formed.

  In the vehicle body lower part structure according to the third aspect, a space formed below the seat cushion can be accessed from the rear of the seat cushion, and this space can be used as a storage space, for example.

  A vehicle body lower structure according to a fourth aspect of the present invention is the vehicle body lower structure according to any one of the first to third aspects, wherein the at least part of the space is covered from the upper side in the vehicle vertical direction. The cushion material which comprises the said seat cushion of a vehicle seat was provided.

  In the vehicle body lower structure according to the fourth aspect of the invention, the downward stroke (bending) of the seat cushion is permitted by bending the cushion material so as to protrude into the space located below the seat cushion. Thereby, a seat cushion can be reduced in thickness.

  As described above, the vehicle body lower part structure according to the present invention has an excellent effect that the space below the seat cushion can be used effectively.

  A vehicle body lower structure 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. It should be noted that arrows FR, UP, and OUT appropriately shown in the drawings respectively indicate the front direction (traveling direction), the upward direction, and the vehicle width direction outside of the vehicle to which the vehicle body lower structure 10 is applied.

  FIG. 2 is a side sectional view showing a rear portion of the vehicle body to which the lower body structure 10 is applied, and FIG. 3 is a sectional view taken along line 3-3 in FIG. As shown in these drawings, the vehicle body lower structure 10 supports a vehicle seat 12 constituting a rear seat at the rear portion of the vehicle body, and is a space R opened below the vehicle seat 12 to the inside of the vehicle, that is, above the floor F. It is set as the structure for forming. This will be specifically described below.

  The vehicle seat 12 mainly includes a seat cushion 14 and a seat back 16 having a lower end connected to a rear end of the seat cushion 14. In this embodiment, the seat cushion 14 and the seat back 16 are connected via a folding mechanism (which may be a reclining mechanism) (not shown), and the seat back 16 is attached to the seat cushion 14 as shown by a solid line in FIG. It is configured to be able to take a standing posture standing upright and a retracted posture folded (overlapped) on the seat cushion 14 as indicated by an imaginary line in FIG. FIG. 3 shows two vehicle seats 12 adjacent in the vehicle width direction.

  The vehicle seat 12 is supported by the vehicle body via a seat frame 18. The seat frame 18 includes a cross frame 20 that is elongated in the vehicle width direction. The cross frame 20 is fixed to a pair of left and right rear side members 24 that form a vehicle body skeleton with brackets 22 at both ends in the longitudinal direction. Therefore, the bracket 22 is configured to function as a cross member that bridges between the left and right rear side members 24 and forms a part of the vehicle body skeleton. The seat frame 18 includes a lower frame 25 that supports the seat cushion 14, that is, the vehicle seat 12 from below. The lower frame 25 has a rear end fixedly connected to the cross frame 20 and a front end supported by the vehicle body frame via a floor panel 32 described later.

  Specifically, the lower frame 25 is composed of a pair of left and right vertical frames 26 formed in a longitudinal “U” shape in the front-rear direction of the vehicle body that opens rearward in a plan view with a wire material, and a wire material. It has a horizontal frame 28 that is formed in a longitudinal frame shape in the vehicle width direction and spans between the longitudinal intermediate portions of the left and right vertical frames 26. As shown in FIG. 3, the left vertical frame 26 supports the left seat cushion 14 (vehicle seat 12), and the right vertical frame 26 supports the right seat cushion 14.

  As shown in FIG. 1, the left and right vertical frames 26 have their rear ends 26 </ b> A fixedly connected to the cross frame 20 (in this embodiment, welded joints), and their front ends 26 </ b> B are floor panels 32. Is supported by a rear floor cross member 30 constituting the vehicle body skeleton. Further, the lower frame 25 is configured such that both longitudinal ends 28A of the horizontal frame 28 are supported by the left and right rear side members 24 via the floor panel 32, respectively.

  The vehicle body lower structure 10 includes a rear floor panel 32 that forms a floor at the rear of the vehicle body, and the rear floor panel 32 forms a space R that opens upward in the vehicle body vertical direction. The rear floor panel 32 is assembled to the seat frame 18 and modularized with the seat frame 18.

  More specifically, the rear floor panel 32 includes a substantially rectangular flat plate-shaped bottom plate 34, a peripheral wall 36 erected from the peripheral edge of the seat back 16, and a substantially rectangular annular shape extending outward from the opening edge of the peripheral wall 36. The space 38 is defined as a space surrounded by the bottom plate 34 and the peripheral wall 36. The rear floor panel 32 is made of resin, and each part is integrally formed by resin molding. In this embodiment, the rear floor panel 32 has an escape portion 32A formed at an appropriate place in order to avoid interference with components arranged below the floor.

  As shown in FIG. 1, the rear floor panel 32 has a pair of left and right engaging claws 40 protruding upward along a pair of left and right side walls 36 </ b> A on the peripheral wall 36. 40 is locked to the cross frame 20 constituting the seat frame 18. Each locking claw 40 is formed in an annular shape with a top portion cut out, and when it is pressed against the cross frame 20 from below, the cross frame 20 enters the inside while elastically deforming. The frame 20 is gripped. In this embodiment, the left and right locking claws 40 are disposed slightly rearward of the central portion in the front-rear direction of the rear floor panel 32.

  Further, as shown in FIGS. 1 and 2, frame locking portions (hook portions) 42 are formed on the front walls 36 </ b> B that define the front edge of the space R in the peripheral wall 36 of the rear floor panel 32. The left and right frame locking portions 42 are configured to allow the front ends 26B of the left and right vertical frames 26 constituting the lower frame 25 to enter (engage) so as to restrict relative displacement in the vehicle body vertical direction and vehicle width direction, respectively. Has been. Further, as shown in FIGS. 1 and 3, frame locking portions 44 are formed on the left and right side walls 36A, respectively. The left and right frame locking portions 44 are configured to allow the longitudinal ends 28 </ b> A of the lateral frame 28 constituting the lower frame 25 to enter so as to restrict relative displacement in the vehicle vertical direction and vehicle longitudinal direction.

  As described above, the rear floor panel 32 is modularized so that it can be handled integrally with the seat frame 18, and is configured to be assembled to the vehicle body together with the seat frame 18. In this assembled state, that is, when the cross frame 20 is fixed to the corresponding rear side member 24 by the left and right brackets 22, as shown in FIGS. 1 and 2, the front portion 38 A of the flange 38 of the rear floor panel 32 is the rear floor cross member 30. 1 and 3, the left and right side portions 38B of the flange 38 are supported from below by the corresponding pair of left and right rear side members 24, as shown in FIGS.

  Therefore, as described above, the lower frame 25 of the seat frame 18 has its front end (the front end 26B of each vertical frame 26) supported by the rear floor cross member 30 as the vehicle body frame via the rear floor panel 32, and the horizontal frame 28. Both longitudinal ends 28 </ b> A of the horizontal frame 28 are supported by a rear side member 24 as a vehicle body frame via a rear floor panel 32.

  As shown in FIG. 2, the seat frame 18 mainly supports the rear portions of the left and right vehicle seats 12, and the position of the cross frame 20 in the longitudinal direction of the vehicle body is substantially equal to the rear end position of the seat cushion 14. I'm doing it. As a result, the space R formed by the rear floor panel 32 has a rear portion opened upward at the rear of the seat cushion 14. Further, in the automobile to which the vehicle body lower structure 10 is applied, a rear bumper reinforcement 46 constituting a rear bumper is disposed immediately behind the rear floor panel 32 forming the space R, and above the rear bumper reinforcement 46. Is formed with a rear opening that is opened and closed by a back door (not shown). As a result, the space R is configured to be easily accessible from the rear opening. In this embodiment, the space R is used as a storage space for carry-in items such as luggage or on-vehicle items.

  Further, in an automobile to which the vehicle body lower structure 10 is applied, as shown in FIG. 2, a metal floor panel 48 is provided on the front side of the rear floor panel 32, and a rear end 48A of the floor panel 48 is a rear floor cross member. 30 is supported. The front end side of the seat cushion 14 is supported by the rear floor cross member 30.

  Next, the operation of the first embodiment will be described.

  In the vehicle body lower structure 10 configured as described above, the rear floor panel 32 assembled to the seat frame 18 that supports the vehicle seat 12 forms a space R below the seat cushion 14. Thus, since the rear floor panel 32 which comprises a vehicle body floor forms the space R, a big storage space can be obtained. In this embodiment, the space R, which is a storage space, spans the left and right vehicle seats 12 as shown in FIGS. 1 and 3 (approximately half or more of the vehicle compartment width) in the vehicle width direction, and FIG. As shown in FIG. 2, the vehicle body has a large space having a longitudinal dimension from the middle part of the seat cushion 14 to the rear bumper reinforcement 46.

  In particular, in the vehicle body lower structure 10, the space R formed by the rear floor panel 32 opens upward at the rear of the 14, so that a storage space that is easy to access from the rear opening of the vehicle body and is easy to use is obtained. Further, in an automobile to which the vehicle body lower structure 10 is applied, the seat back 16 can be used as a storage space by folding the seat back 16 so that the upper surface of the seat back 16 (the back in the standing posture) can be used. Thereby, in the automobile to which the vehicle body lower structure 10 is applied, a large storage space can be obtained as compared with a configuration in which the main storage space is the seat back 16 like the vehicle body lower structure 100 according to the comparative example shown in FIG. The vehicle body lower structure 100 includes a floor panel 102 configured such that a metal floor panel 48 extends to the rear bumper reinforcement 46, and the vehicle is mounted on a flat portion of the floor F formed by the floor panel 102. The sheet 12 is supported. The member denoted by reference numeral 104 in this comparative example is a deck board for forming a flat cargo floor surface from the rear opening to the upper surface of the seat back 16.

  And in the vehicle body lower structure 10, since the seat frame 18 and the rear floor panel 32 are modularized, the structure is simplified. In other words, the vehicle body lower structure 10 has a simple structure as compared with a configuration in which the seat frame 18 and the rear floor panel 32 are independently assembled to the vehicle body. Further, by assembling the rear floor panel 32 to the seat frame 18 whose longitudinal ends are fixed to the pair of left and right rear side members 24, sufficient strength can be secured using the resin rear floor panel 32, and the weight can be reduced. Also contribute. In particular, in the lower body structure 10, the cross frame 20 takes on the function of the cross member 106 in the vicinity of the rear portion of the seat cushion required in the lower body structure 100 shown in FIG. 6, thereby simplifying the body structure and further reducing the weight. It is illustrated.

  Next, another embodiment of the present invention will be described. Note that parts and portions that are basically the same as those in the first embodiment or the previous configuration are denoted by the same reference numerals as those in the first embodiment or the previous configuration, and description thereof is omitted.

(Second Embodiment)
4 shows a vehicle body lower structure 50 according to the second embodiment of the present invention in a perspective view corresponding to FIG. As shown in this figure, the vehicle body lower structure 50 is different from the first embodiment in that it includes a seat frame 54 including a cross frame 20 and a resin panel 52 instead of the seat frame 18. .

  The resin panel 52 is supported so that the rear end 52A is fixed to the cross frame 20 and the front portion 52B is placed on the shallow bottom portion 56 formed on the rear floor panel 32 so as not to be displaced relative to the vehicle body. Yes. Although not shown, the front portion 52B of the resin panel 52 is locked to a locking portion provided on the rear floor panel 32, or is connected to the rear floor panel 32 by a clip or the like. The seat frame 54 is modularized.

  The resin panel 52 is integrally formed with a lower sheet box 58 that opens upward. In this embodiment, the under-seat box 58 is formed at the center of the resin panel 52 in the vehicle width direction.

  Although not shown in the drawings, the vehicle body lower structure 50 supports, for example, three vehicle seats 12 arranged in parallel in the vehicle width direction. The under-seat box 58 is accessed by flipping up the front part of the seat cushion 14 constituting the lifting mechanism. Note that an under-seat box 58 may be provided for each vehicle seat 12, and in the configuration for supporting the two-seat vehicle seat 12 as in the first embodiment, either one or both of the vehicles. A sheet lower box 58 may be provided on the work sheet 12. Moreover, in the structure which supports the two-seat vehicle seat 12, a seat lower box 58 may be disposed at the center in the vehicle width direction.

  Other configurations of the vehicle body lower structure 50 are the same as the corresponding configurations of the vehicle body lower structure 10. Therefore, the vehicle body lower structure 50 according to the second embodiment can obtain the same effect by the same operation as that of the first embodiment.

(Third embodiment)
FIG. 5 is a perspective view corresponding to FIG. 1 showing a vehicle body lower structure 60 according to a third embodiment of the present invention. As shown in this figure, the vehicle body lower structure 60 includes a seat frame 62 having the cross frame 20 as a main part instead of the seat frame 18 and a seat cushion spring as a cushion material constituting the cushion structure of the seat cushion 14. 64 is different from the first embodiment.

  The seat cushion spring 64 is a two-dimensional elastic body (for example, a contour mat) for a seat that has an outer edge formed in a substantially rectangular shape in plan view and can expand and contract in the seat width direction and the front-rear direction. Each seat cushion spring 64 has a rear end 64A connected to the cross frame 20 via a plurality of (two in this embodiment) tension coil springs 66, and each front end 64B has a flange 38 on the rear floor panel 32. By being locked by a locking portion (hook or the like) 68 formed on the front portion 38A, the front portion 38A is stretched with an appropriate tension.

  And although illustration is abbreviate | omitted, in the vehicle body lower structure 60, the seat cushion 14 is comprised by mounting the cushion body which consists of polyurethane foams on each seat cushion spring 64, for example, and coat | covering with a skin material. Yes. Thereby, in the seat cushion 14, it is set as the structure which uses the space R as the allowance for the downward bending by seating.

  Other configurations of the vehicle body lower structure 60 are the same as the corresponding configurations of the vehicle body lower structure 10. Therefore, the vehicle body lower structure 60 according to the third embodiment can obtain the same effect by the same operation as that of the first embodiment.

  Further, since the vehicle body lower structure 60 uses the space R as a bending allowance associated with the seat cushion 14 being seated, in other words, it is not necessary to secure a bending allowance inside the seat cushion 14. Thinning can be achieved. Furthermore, by reducing the thickness of the seat cushion 14, in other words, by reducing the vehicle space occupied area of the seat cushion 14, it is possible to increase the storage space in the non-sitting state on the vehicle seat 12. In particular, by reducing the thickness of the seat cushion 14, the floor surface formed by the seat back 16 that is in the folded position can be lowered, so that it is possible to provide a convenient storage space.

  In the above embodiment, the rear portion of the space R is always open upward. However, the present invention is not limited to this example. For example, a lid member for opening and closing the opening end of the space R is provided. It is good also as a composition.

1 is a perspective view showing a lower body structure according to a first embodiment of the present invention. It is a sectional side view which shows the vehicle body lower part structure concerning the 1st Embodiment of this invention. It is front sectional drawing which shows the vehicle body lower part structure concerning the 1st Embodiment of this invention. It is a perspective view which shows the vehicle body lower part structure concerning the 2nd Embodiment of this invention. It is a perspective view which shows the vehicle body lower part structure concerning the 3rd Embodiment of this invention. It is a sectional side view which shows the vehicle body lower part structure which concerns on the comparative example with embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle body lower structure 12 Vehicle seat 14 Seat cushion 18 Seat frame 24 Rear side member (body frame)
32 Rear floor panel 50/60 Lower body structure 54/62 Seat frame 64 Seat cushion spring (cushion material)

Claims (4)

A seat frame for supporting the vehicle seat with respect to the vehicle body;
A floor panel that is assembled to the lower side of the vehicle body in the vertical direction of the seat frame, and that forms a space below the vehicle seat in the vertical direction of the vehicle body;
Body lower structure with   The vehicle body lower part structure according to claim 1, wherein the seat frame is fixed to a vehicle body skeleton.   The vehicle body lower structure according to claim 1 or 2, wherein the floor panel forms the space that opens upward on a rear side in a vehicle longitudinal direction with respect to the seat cushion of the vehicle seat.   The vehicle body lower part structure according to any one of claims 1 to 3, wherein a cushioning material constituting the seat cushion of the vehicle seat is provided so as to cover at least a part of the space from the upper side in the vehicle vertical direction. .

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