JP6907272B2 - Body structure - Google Patents

Description

The present invention relates to a vehicle body structure.

Conventionally, in a vehicle such as an automobile, a structure in which a seat on which an occupant can be seated is supported by a vehicle body is known. For example, Japanese Patent No. 5007183 discloses that a foldable sheet (dive-down sheet) is stored on a lower floor surface lower than the floor surface. The seat includes a seat back rotatably supported by the vehicle body, a seat cushion rotatably attached to the lower portion of the seat back, and leg members rotatably attached to the lower surface of the seat cushion. The leg members are freely displaceable between a storage position that is substantially parallel to the seat cushion and a support position that is substantially perpendicular to the seat cushion. The lower floor surface has a holding groove in which the tips of the leg members in the supporting positions are held. The holding groove engages and holds the tip of the leg member and folds the leg member when the seat is dive down.
By the way, the floor panel is liable to vibrate due to the vibration of the tire or the like. Japanese Patent No. 5007183 does not disclose a technique for reducing vibration of a floor panel.

Japanese Patent No. 5007183

Therefore, an object of the present invention is to provide a vehicle body structure capable of reducing vibration of a floor panel.

(1) The vehicle body structure according to one aspect of the present invention (for example, the vehicle body front structure 1 in the embodiment) is a frame (for example, the floor frame in the embodiment ) in the floor panel of the vehicle (for example, the floor panel 10 in the embodiment). ) Is not reinforced by (for example, the non-reinforced surface 11 in the embodiment), and a bracket (for example, the leg holding member 5 in the embodiment) for attaching the leg holding member (for example, the leg holding member 5 in the embodiment) for holding the leg portion of the seat is attached. The bracket 20) is provided, and the bracket includes a pedestal portion on which the leg holding member is installed (for example, the pedestal portion 21 in the embodiment) and a center of the non-reinforcing surface from the pedestal portion (for example, an embodiment). An extension portion (for example, an extension portion 22 in the embodiment) is provided, which extends toward the vicinity of the center Pc of the non-reinforcing surface in the embodiment and has a weight (for example, the weight 25 in the embodiment) fixed thereto.

(2) In one aspect of the present invention, the extension portion has a hat cross-sectional shape, forms a closed cross section together with the floor panel, and the extension portion is a top surface portion (for example, implemented) constituting the hat cross-sectional shape. It has a top surface portion 40) in the form, and the weight may be arranged inside the closed cross section and fixed to the top surface portion.

(3) In one aspect of the present invention, the extension portion has a first collar portion (for example, the first collar portion 41 in the embodiment) that constitutes the cross-sectional shape of the hat, and the first collar portion is the said. It may be arranged near the center of the non-reinforcing surface and fixed to the floor panel.

(4) In one aspect of the present invention, the extension portion has a second collar portion (for example, the second collar portion 42 in the embodiment) constituting the cross-sectional shape of the hat, and the second collar portion is the said. It may be arranged on the side opposite to the first flange portion via the top surface portion and fixed to the floor panel.

(5) In one aspect of the present invention, the extension portion has a hat cross-sectional shape, the extension portion has a top surface portion constituting the hat cross-sectional shape, and the weights are both side edges of the top surface portion. It may be welded continuously along the portion or one side edge.

(6) In one aspect of the present invention, the top surface portion has an elongated hole (for example, the elongated hole 40h in the embodiment) long in the direction in which the extension portion extends, and the weight is attached to the edge portion of the elongated hole. It may be welded continuously along.

(7) In one aspect of the present invention, the top surface portion has a recessed portion (for example, recessed portions 40k1, 40k2 in the embodiment), and the weight is welded only in the recessed portion of the top surface portion. The top surface portion may be separated from a portion other than the recessed portion (for example, a portion 40n other than the recessed portion in the embodiment).

(8) In one aspect of the present invention, the weight may be separated from the floor panel.

(9) In one aspect of the present invention, the floor panel may have a bead shape (for example, the first bead 15 in the embodiment) that passes through the center of the non-reinforcing surface.

(10) In one aspect of the present invention, the floor panel has a raised portion (for example, a raised portion 13 in the embodiment) and an inclined surface (for example, an inclined surface 14 in the embodiment) arranged around the non-reinforced surface. May have.

(11) In one aspect of the present invention, the non-reinforcing surface includes a pair of front and rear cross members (for example, cross members 2A and 2B in the embodiment) extending in the vehicle width direction and a pair of left and right side sills extending in the vehicle front and rear direction. For example, it may be partitioned by a side sill 3L, 3R in the embodiment) and a center tunnel portion (for example, the center tunnel portion 4 in the embodiment) extending in the front-rear direction at the center position in the vehicle width direction.

(12) In one aspect of the present invention, the brackets may be arranged in pairs on the left and right sides of the floor panel.

According to the aspect (1) above, the bracket includes a pedestal portion on which the leg holding member is installed and an extension portion extending from the pedestal portion toward the vicinity of the center of the non-reinforcing surface and to which the weight is fixed. By preparing, the following effects are achieved.
Since the weight can be arranged near the center of the non-reinforced surface that is not reinforced by the frame, the vibration of the floor panel can be reduced.
In addition, the bracket can improve the strength and rigidity of the floor panel. Therefore, the weight can be reduced as compared with the case where the floor panel is reinforced by the floor frame or the thickness of the floor panel is increased.
Therefore, it is possible to achieve both quietness and weight reduction of the vehicle.

According to the aspect (2) above, the extension portion has a hat cross-sectional shape and forms a closed cross section together with the floor panel, the extension portion has a top surface portion forming the hat cross-sectional shape, and the weight is closed. By arranging it inside the cross section and fixing it to the top surface, the following effects are obtained.
By arranging the weight inside the closed cross section, the indoor space is not impaired. For example, even when the weight is increased in order to approach the panel eigenvalue of the vibration source, the indoor space can be secured.
In addition, by fixing the weight to the top surface portion of the cross-sectional shape of the hat, the supporting strength and rigidity of the weight can be improved.

According to the aspect (3) above, the extension portion has a first flange portion constituting the cross-sectional shape of the hat, and the first flange portion is arranged near the center of the non-reinforcing surface and is fixed to the floor panel. By doing so, the following effects are achieved.
Since the weight of the weight can be applied to the vicinity of the center of the non-reinforced surface that is not reinforced by the frame, the vibration of the floor panel can be reduced more effectively.

According to the aspect (4) above, the extension portion has a second flange portion constituting the cross-sectional shape of the hat, and the second flange portion is arranged on the side opposite to the first collar portion via the top surface portion. , By being fixed to the floor panel, it has the following effects.
By fixing the first flange portion and the second flange portion to the floor panel, it is possible to support a heavy weight and improve the holding strength of the leg portion of the seat.

According to the aspect (5) above, the extension portion has a hat cross-sectional shape, the extension portion has a top surface portion constituting the hat cross-sectional shape, and the weight is a side edge portion or one side edge portion of the top surface portion. By being continuously welded along the line, the following effects are obtained.
In general, heavy weights have a large plate thickness, so that sandwich welding such as spot welding is difficult. On the other hand, according to this aspect, since the weights are continuously welded along both side edges or one side edges of the top surface portion, the weights can be firmly joined.

According to the aspect (6) above, the top surface portion has an elongated hole that is long in the direction in which the extension portion extends, and the weight is continuously welded along the edge portion of the elongated hole. It works.
In general, heavy weights have a large plate thickness, so that sandwich welding such as spot welding is difficult. On the other hand, according to this aspect, since the weight is continuously welded along the edge of the elongated hole, the weight can be firmly joined. In addition, the weight can be stably supported.

According to the aspect (7) above, the top surface portion has a recessed portion, and the weight is welded only at the recessed portion of the top surface portion and is separated from the portion of the top surface portion other than the recessed portion. It has the following effects.
It is possible to prevent the weight from interfering with the portion of the top surface other than the recessed portion due to vibration to generate a tapping sound.

According to the aspect (8) above, the weight has the following effects when it is separated from the floor panel.
It is possible to prevent the weight from interfering with the floor panel due to vibration and generating a tapping sound.

According to the aspect (9) above, the floor panel has a bead shape that passes through the center of the non-reinforcing surface, and thus has the following effects.
It is possible to reinforce the central portion (maximum vibration width portion) of the non-reinforcing surface in the floor panel without adding a floor frame or the like.

According to the aspect (10) above, the floor panel has the following effects by having a raised portion and an inclined surface arranged around the non-reinforcing surface.
It is possible to reinforce the periphery of the non-reinforcing surface in the floor panel without adding a floor frame or the like. For example, vehicle parts such as a fuel tank can be arranged below the raised portion.

According to the aspect (11) above, the non-reinforcing surface includes a pair of front and rear cross members extending in the vehicle width direction, a pair of left and right side sills extending in the vehicle front and rear direction, and a center tunnel extending in the front and rear direction at the center position in the vehicle width direction. By being separated by a part, the following effects are obtained.
A pair of front and rear cross members, side sills and a center tunnel can reinforce the periphery of the non-reinforcing surface in the floor panel.

According to the aspect (12) above, the brackets are arranged in pairs on the left and right sides of the floor panel to obtain the following effects.
Vibration can be reduced on the left and right sides of the floor panel. For example, when the left and right trailing arms of the suspension are provided, the vibration transmitted from the left and right trailing arms to the floor panel can be reduced.

The perspective view of the vehicle body structure which concerns on embodiment. An enlarged perspective view of a main part of the vehicle body structure according to the embodiment. The perspective view of the bracket which concerns on embodiment. Top view of the bracket according to the embodiment. It is a side view of the bracket which concerns on embodiment, and is the V arrow view of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment, in a vehicle such as an automobile having a monocoque structure, a leg member (leg portion) of a foldable seat (dive down seat) is provided on a floor panel having a non-reinforced surface that is not reinforced by a floor frame (frame). A vehicle body structure provided with a bracket for attaching a leg holding member to be held will be described. Unless otherwise specified, the directions such as front, rear, left, and right in the following description shall be the same as the directions in the vehicle described below. At appropriate points in the figure used in the following description, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left side of the vehicle, an arrow UP indicating the upper part of the vehicle, and a line CL indicating the center of the left and right sides of the vehicle body are shown.

<Body structure 1>
FIG. 1 is a perspective view of a vehicle body structure 1 according to an embodiment.
As shown in FIG. 1, the floor panel 10 has a non-reinforced surface 11 that is not reinforced by a floor frame (not shown). For example, the floor panel 10 is a thin steel plate arranged at the rear of the vehicle. Although not shown, loads (vibrations) are input to the floor panel 10 from the left and right trailing arms of the suspension.

The non-reinforcing surface 11 has a pair of front and rear cross members 2A and 2B (shown by a two-dot chain line in the figure) extending in the vehicle width direction, a pair of left and right side sills 3L and 3R extending in the vehicle front and rear direction, and a center position in the vehicle width direction. It is partitioned by a center tunnel portion 4 extending in the front-rear direction.

In the embodiment, the front cross member 2A is a floor cross member and the rear cross member 2B is a middle cross member. Reference numeral 5 in the drawing indicates a leg holding member that holds a leg member (not shown) of the foldable sheet. The leg holding member 5 is arranged so as to straddle the middle cross member 2B and the pedestal portion 21. That is, the leg holding member 5 is bridged between the middle cross member 2B and the pedestal portion 21.

The non-reinforcing surface 11 is arranged at a position lower than the uppermost surface 12 of the floor panel 10 at the rear of the vehicle. The non-reinforcing surface 11 has a rectangular shape in a plan view (see FIG. 2). Although not shown, a foldable sheet is installed on the non-reinforcing surface 11.

As shown in FIG. 2, the floor panel 10 has a bead shape 15 (hereinafter, also referred to as “first bead 15”) that passes through the center Pc of the non-reinforcing surface 11. The center Pc of the non-reinforced surface 11 means the center of the non-reinforced surface 11 having a rectangular shape in a plan view. The first bead 15 extends linearly in the vehicle width direction. The first bead 15 extends continuously through the center tunnel portion 4 (see FIG. 1).

As shown in FIG. 1, the floor panel 10 has a raised portion 13 and an inclined surface 14 arranged around the non-reinforcing surface 11. The raised portion 13 is inclined so as to be located downward from the uppermost surface 12 of the floor panel 10 at the rear of the vehicle toward the non-reinforcing surface 11. The inclined surface 14 is inclined so as to be located downward from the outer end portion (left and right side sills 3L, 3R) in the vehicle width direction of the rear part of the vehicle toward the non-reinforcing surface 11.

The floor panel 10 has bead shapes 16A and 16B (hereinafter, also referred to as “second beads 16A and 16B”) extending from the raised portion 13 and the inclined surface 14 toward the non-reinforcing surface 11. A plurality of second beads 16A and 16B are arranged on each of the raised portion 13 and the inclined surface 14. A part of the plurality of second beads 16A extends continuously along the inclination of the raised portion 13. A part of the plurality of second beads 16B extends continuously along the inclination of the inclined surface 14. A part of the second bead 16B of the inclined surface 14 is connected to the first bead 15 (see FIG. 1).

<Bracket 20>
The bracket 20 is a member for attaching the leg holding member 5 to the floor panel 10. The bracket 20 includes a pedestal portion 21 on which the leg holding member 5 is installed, and an extension portion 22 extending from the pedestal portion 21 toward the vicinity of the center Pc of the non-reinforcing surface 11. The vicinity of the center Pc of the non-reinforcing surface 11 is a region including a portion having the largest amplitude when the floor panel 10 vibrates (hereinafter, also referred to as a “vibration maximum width portion”). The pedestal portion 21 and the extension portion 22 are integrally formed of the same member. In this embodiment, a pair of brackets 20 are arranged on the left and right sides of the floor panel 10 (see FIG. 1).

As shown in FIG. 3, the pedestal portion 21 includes a base portion 30 and a second flange portion 42 joined to the floor panel 10 (see FIG. 2), and a seat surface portion 31 to which the leg holding member 5 (see FIG. 2) is attached. And have.
The base portion 30 is arranged at the rear end portion of the floor panel 10. The base portion 30 has an uneven shape including a bead shape.
The seat surface portion 31 projects above the base portion 30 as a whole. The seat surface portion 31 has a plurality of (for example, four in this embodiment) through holes 31h.

The extension portion 22 extends forward from the front end of the pedestal portion 21 toward the vicinity of the center Pc of the non-reinforcing surface 11 (see FIG. 2). The extension portion 22 is a portion of the bracket 20 to which a weight 25 for reducing vibration of the floor panel 10 can be attached. The weight 25 is joined to the extension portion 22 by welding.
As shown in FIG. 5, the extension portion 22 has a hat cross-sectional shape. The extension portion 22 forms a closed cross section together with the floor panel 10.

The extension portion 22 has a top surface portion 40, a first flange portion 41, and a second flange portion 42 that form a cross-sectional shape of the hat.
The top surface portion 40 is a portion located at the uppermost portion of the extension portion 22 having a cross-sectional shape of the hat. As shown in FIG. 4, the top surface portion 40 has an elongated hole 40h that is long in the direction in which the extension portion 22 extends (front-rear direction). Hereinafter, the direction in which the extension portion 22 extends is also referred to as an “extension direction”, and the width direction of the extension portion 22 orthogonal to the extension direction is also referred to as an “extension width direction”.

The top surface portion 40 has a plurality of (for example, two in this embodiment) through holes 40i. The two through holes 40i are arranged at intervals in the extension width direction. The elongated hole 40h is arranged between the two through holes 40i. The elongated hole 40h is arranged at the center in the extension width direction.

The top surface portion 40 has recessed portions 40k1 and 40k2 that are recessed below the top surface portion 40. The recesses 40k1 and 40k2 are a first recess 40k1 having an oval shape along the outer shape of the elongated hole 40h in the top view and a second recess 40k1 having a semicircular shape (a shape obtained by halving the oval) in the top view. It is 40k2. The first recessed portion 40k1 is arranged at the central portion in the extension width direction. The second recessed portions 40k2 are arranged at both ends in the extension width direction. Both ends of the top surface portion 40 in the extension width direction have notches 40v recessed inward in the extension width direction. The second recessed portion 40k2 is arranged at a position facing the notched portion 40v.

The first flange portion 41 is fixed to the floor panel 10 (see FIG. 5). In the present embodiment, the first flange portion 41 is joined to the floor panel 10 by welding. The first flange portion 41 is a portion of the extension portion 22 having a cross-sectional shape of the hat that extends forward from the front end of the top surface portion 40. The first flange portion 41 has an uneven shape including a bead shape.

The recess of the first flange portion 41 has a welding surface 41a (hereinafter, also referred to as “first welding surface 41a”) for welding to the floor panel 10. The first flange portion 41 has a plurality of (for example, three in this embodiment) first welded surfaces 41a. The three first welding surfaces 41a are arranged at intervals in the extension width direction. For example, the first flange portion 41 is joined to the floor panel 10 by spot welding at each of the three first welded surfaces 41a. Reference numeral W1 in the figure indicates a welded portion on the first welded surface 41a.

The second flange portion 42 is fixed to the floor panel 10 (see FIG. 5). In the present embodiment, the second flange portion 42 is joined to the floor panel 10 by welding. The second flange portion 42 is a portion of the pedestal portion 21 that descends downward from the front end of the seat surface portion 31 and extends forward, and of the extension portion 22 having a cross-sectional shape of the hat, descends downward from the rear end of the top surface portion 40 and rearward. It is also the part that extends to. The second flange portion 42 is arranged on the side opposite to the first flange portion 41 via the top surface portion 40. The second flange portion 42 has an uneven shape including a bead shape.

The recess of the second flange portion 42 has a welding surface 42a (hereinafter, also referred to as “second welding surface 42a”) for welding to the floor panel 10. The second flange portion 42 has a plurality of (for example, three in this embodiment) second welded surfaces 42a. The three second welding surfaces 42a are arranged at intervals in the extension width direction. For example, the second flange portion 42 is joined to the floor panel 10 by spot welding at each of the three second welding surfaces 42a. Of the three second welding surfaces 42a, one second welding surface 42a on the center side in the vehicle width direction has two welding points. Reference numeral W2 in the figure indicates a welded portion on the second welded surface 42a.

<Weight 25>
The weight 25 has a rectangular parallelepiped shape having a length in the extension width direction. The weight 25 has a positioning hole 25i (through hole of the weight 25) for positioning the extension portion 22 with the through hole 40i. The through hole 40i and the positioning hole 25i are coaxial. As shown in FIG. 5, the weight 25 is arranged inside the closed cross section formed by the extension portion 22 and the floor panel 10. The weight 25 is fixed to the top surface portion 40 of the extension portion 22. In the present embodiment, the weight 25 is joined to the top surface portion 40 by welding. As shown in FIG. 4, the weight 25 is welded only in the recessed portions 40k1 and 40k2 of the top surface portion 40.

As shown in FIG. 5, the weight 25 is separated from the portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2. In a state where the weight 25 is joined to the top surface portion 40, a gap 26 is formed between the upper surface of the weight 25 and the portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2. The gap 26 has a size such that the weight 25 does not come into contact with the portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2 when the floor panel 10 vibrates.

The weight 25 is separated from the floor panel 10. A gap 27 is formed between the lower surface of the weight 25 and the upper surface of the floor panel 10 in a state where the weight 25 is joined to the top surface portion 40. The gap 27 has a size such that the weight 25 does not come into contact with the floor panel 10 when the floor panel 10 vibrates.

As shown in FIG. 4, the weight 25 is continuously welded along the edge of the elongated hole 40h. In the present embodiment, the weight 25 is continuously welded in the extending direction along the one-sided edge of the elongated hole 40h. Reference numeral W3 in the figure indicates a welded portion in the elongated hole 40h.

The weight 25 is continuously welded along the side edge portion of the top surface portion 40. In the present embodiment, the weight 25 is continuously welded in the extension direction along each of both side edges of the top surface portion 40. Reference numeral W4 in the figure indicates a welded portion on the side edge portion of the top surface portion 40.

For example, the weight 25 is joined to the top surface portion 40 by arc welding such as MIG welding or laser welding in each of the first recessed portion 40k1 and the second recessed portion 40k2.

As described above, in the vehicle body structure 1 of the above embodiment, the bracket 20 for attaching the leg holding member 5 for holding the leg portion of the seat to the non-reinforced surface 11 of the floor panel 10 of the vehicle which is not reinforced by the frame. The bracket 20 includes a pedestal portion 21 on which the leg holding member 5 is installed, an extension portion 22 extending from the pedestal portion 21 toward the vicinity of the center Pc of the non-reinforcing surface 11, and an extension portion 22 to which the weight 25 is fixed. To be equipped.
According to this configuration, the weight 25 can be arranged in the vicinity of the center Pc of the non-reinforced surface 11 that is not reinforced by the frame, so that the vibration of the floor panel 10 can be reduced.
In addition, the bracket 20 can improve the strength and rigidity of the floor panel 10. Therefore, the weight can be reduced as compared with the case where the floor panel 10 is reinforced by the floor frame or the thickness of the floor panel 10 is increased.
Therefore, it is possible to achieve both quietness and weight reduction of the vehicle.

In the above embodiment, the extension portion 22 has a hat cross-sectional shape and forms a closed cross section together with the floor panel 10, the extension portion 22 has a top surface portion 40 constituting the hat cross-sectional shape, and the weight 25 is closed. By arranging it inside the cross section and fixing it to the top surface portion 40, the following effects are obtained.
By arranging the weight 25 inside the closed cross section, the indoor space is not impaired. For example, even when the weight 25 is increased in order to approach the panel eigenvalue of the vibration source, the indoor space can be secured.
In addition, by fixing the weight 25 to the top surface portion 40 having the cross-sectional shape of the hat, the support strength and rigidity of the weight 25 can be improved.

In the above embodiment, the extension portion 22 has a first flange portion 41 that constitutes a cross-sectional shape of the hat, and the first flange portion 41 is arranged near the center Pc of the non-reinforcing surface 11 and is fixed to the floor panel 10. By doing so, the following effects are achieved.
Since the weight of the weight 25 can be applied to the vicinity of the center Pc of the non-reinforced surface 11 that is not reinforced by the frame, the vibration of the floor panel 10 can be reduced more effectively.

In the above embodiment, the extension portion 22 has a second flange portion 42 that constitutes a cross-sectional shape of the hat, and the second collar portion 42 is arranged on the side opposite to the first collar portion 41 via the top surface portion 40. By being fixed to the floor panel 10, the following effects are obtained.
By fixing the first flange portion 41 and the second flange portion 42 to the floor panel 10, it is possible to support the heavy weight 25 and improve the holding strength of the leg portion of the seat.

In the above embodiment, the extension portion 22 has a hat cross-sectional shape, the extension portion 22 has a top surface portion 40 constituting the hat cross-sectional shape, and the weight 25 is continuous along both side edges of the top surface portion 40. By being welded in a targeted manner, the following effects are obtained.
In general, since the heavy weight 25 has a large plate thickness, sandwich welding such as spot welding is difficult. On the other hand, according to the present embodiment, since the weight 25 is continuously welded along both side edges of the top surface portion 40, the weight 25 can be firmly joined.

In the above embodiment, the top surface portion 40 has an elongated hole 40h long in the direction in which the extension portion 22 extends, and the weight 25 is continuously welded along the edge portion of the elongated hole 40h. It works.
In general, since the heavy weight 25 has a large plate thickness, sandwich welding such as spot welding is difficult. On the other hand, according to the present embodiment, since the weight 25 is continuously welded along the edge of the elongated hole 40h, the weight 25 can be firmly joined. In addition, the weight 25 can be stably supported.

In the above embodiment, the top surface portion 40 has a recessed portion 40k1, 40k2, and the weight 25 is welded only in the recessed portion 40k1, 40k2 of the top surface portion 40, except for the recessed portion 40k1, 40k2 of the top surface portion 40. By being separated from the portion 40n, the following effects are obtained.
It is possible to prevent the weight 25 from interfering with the portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2 due to vibration to generate a hitting sound.

In the above embodiment, the weight 25 has the following effects when it is separated from the floor panel 10.
It is possible to prevent the weight 25 from interfering with the floor panel 10 due to vibration to generate a tapping sound.

In the above embodiment, the floor panel 10 has a bead shape 15 (first bead 15) that passes through the center Pc of the non-reinforcing surface 11 to obtain the following effects.
The central Pc portion (maximum vibration width portion) of the non-reinforcing surface 11 can be reinforced in the floor panel 10 without adding a floor frame or the like.

In the above embodiment, the floor panel 10 has the following effects by having the raised portion 13 and the inclined surface 14 arranged around the non-reinforcing surface 11.
The periphery of the non-reinforcing surface 11 can be reinforced in the floor panel 10 without adding a floor frame or the like. For example, a fuel tank (not shown) can be arranged below the raised portion 13.

In the above embodiment, the non-reinforcing surface 11 extends in the front-rear direction with a pair of front-rear cross members 2A and 2B extending in the vehicle width direction, a pair of left-right side sills 3L and 3R extending in the vehicle front-rear direction, and a center position in the vehicle width direction. By being partitioned by the center tunnel portion 4, the following effects are obtained.
A pair of front and rear cross members 2A, 2B, side sills 3L, 3R, and a center tunnel portion 4 can reinforce the peripheral edge of the non-reinforcing surface 11 in the floor panel 10.

In the above embodiment, the brackets 20 are arranged in pairs on the left and right sides of the floor panel 10 to obtain the following effects.
Vibration can be reduced on the left and right sides of the floor panel 10. For example, when the left and right trailing arms of the suspension are provided, the vibration transmitted from the left and right trailing arms to the floor panel 10 can be reduced.

In the above embodiment, the leg holding member 5 is bridged between the middle cross member 2B and the pedestal portion 21 to obtain the following effects.
The pedestal portion 21 can be reinforced to improve the strength and rigidity. Therefore, the weight can be reduced as compared with the case where the floor panel 10 is reinforced by the floor frame or the thickness of the floor panel 10 is increased.

<Modification example>
In the above embodiment, the vehicle body structure 1 has been described with reference to an example applied to the floor panel 10 arranged at the rear of the vehicle, but the present invention is not limited to this. For example, the vehicle body structure 1 may be applied to a floor panel arranged at the front portion of the vehicle.

In the above embodiment, an example in which the pedestal portion 21 and the extension portion 22 are integrally formed of the same member has been described, but the present invention is not limited to this. For example, the pedestal portion 21 and the extension portion 22 may be formed separately by different members. For example, the bracket 20 is not limited to being formed of a single member, and may be formed by combining a plurality of members.

In the above embodiment, the extension portion 22 has been described with reference to an example having a hat cross-sectional shape, but the present invention is not limited to this. For example, the extension portion 22 may have a shape other than the cross-sectional shape of the hat, such as an L-shape or a shape like a cantilever.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is arranged inside the closed cross section, but the weight 25 is not limited to this. For example, the weight 25 may be arranged outside the closed cross section.

In the above embodiment, each of the first flange portion 41 and the second flange portion 42 has been described by giving an example of being fixed to the floor panel 10, but the present invention is not limited to this. For example, the second flange portion 42 does not have to be fixed to the floor panel 10. That is, at least one of the first flange portion 41 and the second flange portion 42 does not have to be fixed to the floor panel 10.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is continuously welded along both side edges of the top surface portion 40, but the present invention is not limited to this. For example, the weight 25 may be continuously welded along one side edge of the top surface 40. For example, the weight 25 does not have to be continuously welded along the side edge of the top surface 40.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is continuously welded along one edge of the elongated hole 40h, but the present invention is not limited to this. For example, the weight 25 may be continuously welded along the edges on both sides of the elongated hole 40h. For example, the weight 25 does not have to be continuously welded along the edge of the elongated hole 40h.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is welded only in the recessed portions 40k1 and 40k2 of the top surface portion 40, but the present invention is not limited to this. For example, the weight 25 may be welded at a portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is separated from the portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2, but the present invention is not limited to this. For example, the weight 25 may be in contact with a portion 40n of the top surface portion 40 other than the recessed portions 40k1 and 40k2.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is separated from the floor panel 10, but the weight 25 is not limited to this. For example, the weight 25 may be in contact with the floor panel 10.

In the above embodiment, the floor panel 10 has been described with reference to an example in which the first bead 15 passes through the center Pc of the non-reinforcing surface 11, but the present invention is not limited to this. For example, the floor panel 10 does not have to have the first bead 15. For example, the floor panel 10 may have a shape other than the bead shape, such as a concave shape and a convex shape that overlap with the center Pc of the non-reinforcing surface 11.

In the above embodiment, the floor panel 10 has been described with reference to an example having the second beads 16A and 16B extending from the inclined surfaces 13 and 14 toward the non-reinforcing surface 11, but the present invention is not limited to this. For example, the floor panel 10 does not have to have the second beads 16A and 16B. For example, the floor panel 10 may have a shape other than the bead shape, such as an uneven shape arranged from the inclined surfaces 13 and 14 to the non-reinforcing surface 11.

In the above embodiment, the non-reinforcing surface 11 extends in the front-rear direction with a pair of front-rear cross members 2A and 2B extending in the vehicle width direction, a pair of left-right side sills 3L and 3R extending in the vehicle front-rear direction, and a center position in the vehicle width direction. The description has been given with an example of being partitioned by the center tunnel portion 4, but the present invention is not limited to this. For example, the non-reinforcing surface 11 may not be partitioned by at least a part of a pair of front and rear cross members 2A and 2B, a pair of left and right side sills 3L and 3R, and a center tunnel portion 4.

In the above embodiment, a pair of brackets 20 are arranged on the left and right sides of the floor panel 10, but the present invention is not limited to this. For example, the bracket 20 may be arranged on either the left or right side of the floor panel 10.

In the above embodiment, the weight 25 has been described with reference to an example in which the weight 25 is joined to the top surface portion 40 by welding, but the present invention is not limited to this. For example, the weight 25 may be connected to the top surface portion 40 with bolts or the like. For example, the weight 25 may be connected to the top surface portion 40 with bolts or the like by inserting bolts into the through holes 40i of the top surface portion 40 and the positioning holes 25i of the weight 25 and screwing them into the nuts.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and configurations can be added, omitted, replaced, and other changes can be made without departing from the spirit of the present invention. Yes, it is also possible to appropriately combine the above-mentioned modification examples.

1 ... Body structure 2A ... Floor cross member 2B ... Middle cross member 3L, 3R ... A pair of left and right side sills 4 ... Center tunnel part 5 ... Leg holding member 10 ... Floor panel 11 ... Non-reinforced surface 13 ... Raised part 14 ... Inclined surface 15 … First bead (bead shape that passes through the center of the non-reinforced surface)
16A, 16B ... Second bead (bead shape extending from an inclined surface to a non-reinforced surface)
20 ... Bracket 21 ... Pedestal 22 ... Extension 25 ... Weight 40 ... Top surface 40h ... Long hole 40k1 ... First recess (dent)
40k2 ... Second recess (dent)
41 ... 1st flange 42 ... 2nd flange Pc ... Center of non-reinforced surface W1 ... Welded part on the 1st welded surface (fixed part of 1st flange)
W2 ... Welded part on the second welded surface (fixed part of the second flange)
W3 ... Welded part in the elongated hole W4 ... Welded part in the side edge of the top surface

Claims (12)

A bracket for attaching a leg holding member for holding the legs of the seat is provided on the non-reinforced surface of the floor panel of the vehicle which is not reinforced by the frame.
The bracket
The pedestal on which the leg holding member is installed and
An extension portion extending from the pedestal portion toward the vicinity of the center of the non-reinforcing surface and having a fixed weight, and an extension portion.
A car body structure characterized by being equipped with. The extension has a hat cross-section and forms a closed cross-section with the floor panel.
The extension portion has a top surface portion that constitutes the cross-sectional shape of the hat.
The vehicle body structure according to claim 1, wherein the weight is arranged inside the closed cross section and fixed to the top surface portion. The extension portion has a first collar portion that constitutes the cross-sectional shape of the hat.
The vehicle body structure according to claim 2, wherein the first flange portion is arranged near the center of the non-reinforced surface and is fixed to the floor panel. The extension portion has a second flange portion that constitutes the cross-sectional shape of the hat.
The vehicle body structure according to claim 3, wherein the second flange portion is arranged on the side opposite to the first collar portion via the top surface portion and is fixed to the floor panel. The extension portion has a hat cross-sectional shape and has a cross-sectional shape.
The extension portion has a top surface portion that constitutes the cross-sectional shape of the hat.
The vehicle body structure according to any one of claims 1 to 4, wherein the weight is continuously welded along both side edges or one side edge of the top surface portion. The top surface portion has an elongated hole that is long in the direction in which the extension portion extends.
The vehicle body structure according to claim 5, wherein the weights are continuously welded along the edge of the elongated hole. The top surface portion has a recessed portion and has a recessed portion.
The vehicle body structure according to claim 5 or 6, wherein the weight is welded only in the recessed portion of the top surface portion and is separated from a portion of the top surface portion other than the recessed portion. The vehicle body structure according to claim 7, wherein the weight is separated from the floor panel. The vehicle body structure according to any one of claims 1 to 8, wherein the floor panel has a bead shape passing through the center of the non-reinforced surface. The vehicle body structure according to claim 9, wherein the floor panel has a raised portion and an inclined surface arranged around the non-reinforced surface. The non-reinforcing surface is partitioned by a pair of front and rear cross members extending in the vehicle width direction, a pair of left and right side sills extending in the vehicle front and rear direction, and a center tunnel portion extending in the front and rear direction at the center position in the vehicle width direction. The vehicle body structure according to any one of claims 1 to 10, wherein the vehicle body structure is characterized. The vehicle body structure according to any one of claims 1 to 11, wherein the brackets are arranged in pairs on the left and right sides of the floor panel.

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