JP6875947B2 - Leg brackets and vehicle seats - Google Patents

Description

The present invention relates to a leg bracket and a vehicle seat, and more particularly to a leg bracket and a vehicle seat that can prevent the connecting portion from tilting due to a load from the vehicle side.

A seat-side fastening portion that is fastened to a vehicle seat, a vehicle floor-side fastening portion that is formed at different positions in the front-rear direction of the seat-side fastening portion and the vehicle, and is fastened to the vehicle floor, a seat-side fastening portion, and a vehicle floor-side fastening portion. There is a leg bracket that includes a connecting portion for connecting the vehicle seats and a vehicle seat to be connected to the vehicle floor (Patent Document 1).

According to the leg bracket disclosed in Patent Document 1, a bent portion in which both outer edges of the vehicle floor side fastening portion and the connecting portion in the vehicle width direction are bent, and a leg for a load input to the leg bracket when the vehicle is running. The strength of the bracket can be secured.

Japanese Unexamined Patent Publication No. 2001-1804 (Fig. 1 etc.)

However, in the conventional leg bracket described above, due to a load from the side of the vehicle (for example, a force that another vehicle collides with from the side), a force in the direction in which the vehicle seat moves along the upper surface of the vehicle floor is applied to the vehicle. When acting on the seat, the leg bracket is rotated horizontally around the joint with the vehicle floor. In this case, a force acts in the direction in which the vehicle floor side fastening portion and the seat side fastening portion of the leg bracket are separated from each other in the horizontal direction, and the connecting portion connecting the vehicle floor side fastening portion and the seat side fastening portion is moved to the vehicle floor side. There was a problem that it was easy to lean.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a leg bracket and a vehicle seat capable of suppressing tilting of a connecting portion due to a load from the vehicle side.

In order to achieve this object, the leg bracket of the present invention is formed at different positions in the seat side fastening portion to be fastened to the vehicle seat and the seat side fastening portion in the front-rear direction of the vehicle, and is fastened to the vehicle floor. It includes a side fastening portion, a connecting portion that connects the seat side fastening portion and the vehicle floor side fastening portion, and the vehicle floor side fastening portion includes a protruding portion that protrudes in the front-rear direction of the vehicle. projections, facing surfaces of the vehicle floor in contact with the upper surface of the vehicle floor, the vehicle floor side engagement portion and the sheet-side engagement portion of the formed at an edge portion in the vehicle width direction of Rutotomoni the vehicle floor side fastening portion The connecting portion is formed at two locations on both outer ends, and the connecting portion is provided with a pair of bent portions on both outer edges in the vehicle width direction, at least a part of which is bent toward the protruding direction of the protruding portion, and a pair thereof. the bent portion of the over the seat fastening portion on the vehicle floor side fastening portion is extended, Ru is connected to each said pair of protrusions.

According to the leg bracket of claim 1, the vehicle floor side fastening portion includes a projecting portion that protrudes in the front-rear direction of the vehicle, and the projecting portion has a surface facing the vehicle floor abutting on the upper surface of the vehicle floor and is fastened on the vehicle floor side. Since it is formed on the edge of the portion on the seat side fastening portion side, the load of the vehicle seat is applied to the protruding portion side of the vehicle floor side fastening portion via the connecting portion in a state where the load from the vehicle side is not acting on the vehicle. Can be easily acted in the direction of pushing down. As a result, the normal force acting on the protrusion from the vehicle floor can be increased. Therefore, since the frictional resistance between the vehicle floor side fastening portion and the vehicle floor can be increased, it is possible to prevent the leg bracket from rotating with respect to the vehicle floor due to the load from the vehicle side. As a result, there is an effect that the connecting portion of the leg bracket can be prevented from tilting toward the vehicle floor side due to the load from the vehicle side.

Further, collision detecting section, so is formed in two places of both outer ends in the vehicle width direction of the vehicle floor side fastening portion, the fastening positions of the vehicle floor side engagement portion and the vehicle floor at least either of the pair of projecting portions It can be formed at a position as far as possible from. Therefore, it is possible to increase the force required when the vehicle floor side fastening portion rotates around the fastening position with the vehicle floor, and it is possible to easily suppress the rotation of the leg bracket with respect to the vehicle floor.

Further , the connecting portion is provided with a pair of bent portions on both outer edges in the vehicle width direction, at least a part of which is bent in the projecting direction of the protruding portion, and the pair of bent portions are formed from the seat side fastening portion to the vehicle floor. Since it extends over the side fastening portions and is connected to a pair of protruding portions, the rigidity of both ends of the connecting portion in the vehicle width direction is increased by the bending portion, and the load of the vehicle seat is transferred through the bending portion. It can be easily transmitted to the vehicle floor side fastening part. Since the bent portion is connected to the protruding portion, the protruding portion can be easily pushed down to the vehicle floor side by the load of the vehicle seat in a state where the load from the vehicle side is not acting on the vehicle. This has the effect of increasing the frictional resistance between the vehicle floor side fastening portion and the vehicle floor, making it easier to prevent the leg bracket from rotating with respect to the vehicle floor.

According to the leg bracket according to claim 2 , in addition to the effect of the leg bracket according to claim 1 , the cross section of the connecting portion with the vehicle floor side fastening portion is along the edge portion on the protruding tip side of the protruding portion. Since it is formed in a shape and is connected over the entire area of the edge portion on the protruding tip side of the protruding portion, the load from the vehicle side acts on the vehicle as compared with the case where the bent portion is connected to the inside of the protruding portion. It is possible to easily push down the edge portion on the protruding tip side of the protruding portion by the load of the vehicle seat transmitted to the protruding portion via the bent portion in the non-exposed state. This has the effect of increasing the frictional resistance between the vehicle floor side fastening portion and the vehicle floor, making it easier to prevent the leg bracket from rotating with respect to the vehicle floor.

According to the leg bracket according to the third aspect , in addition to the effect of the leg bracket according to the second aspect , a pair of leg brackets are erected vertically upward from both outer edges in the vehicle width direction of the vehicle floor side fastening portion. A flange portion is provided because it includes a pair of standing portions connected to the bent portion, and a pair of standing portions and a pair of flange portions protruding from the pair of bent portions toward both outer sides in the vehicle width direction. Therefore, the rigidity of the connecting portion in the vehicle width direction can be ensured. This has the effect of suppressing the connecting portion of the leg bracket from tilting in the vehicle width direction due to the load from the vehicle side.

According to leg bracket according to claim 4, in addition to the effects of the leg bracket according to claim 3, the one side of the flange portion of the pair of flange portions, as compared with the flange portion on the other side, connection part Since the length in the direction of connecting the seat side fastening portion and the vehicle floor side fastening portion is formed to be short, the leg bracket can be easily tilted to one side of the flange portion.

According to the vehicle seat according to claim 5, is provided with the leg bracket according to any one of claims 1 to 4, the connecting portion of the leg bracket load from the side of the vehicle is inclined to the vehicle floor side , There is an effect that the vehicle seat can be suppressed from tilting with respect to the vehicle floor.

(A) is a perspective rear view of the vehicle seat according to the first embodiment of the present invention, and (b) is a rear view of the vehicle seat. (A) is a rear view of the rear leg bracket, (b) is a side view of the rear leg bracket in the direction of arrow IIb of FIG. 2 (a), and (c) is a side view of the rear leg bracket of FIG. 2 (a). It is sectional drawing of the rear leg bracket in line IIc-IIc. (A) is a top view of the rear leg bracket, (b) is a bottom view of the rear leg bracket, and (c) is a cross section of the rear leg bracket in line IIIc-IIIc of FIG. 2 (a). It is a figure.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the vehicle seat 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1A is a perspective rear view of the vehicle seat 1 according to the first embodiment of the present invention, and FIG. 1B is a rear view of the vehicle seat 1.

In the following description, with respect to the vehicle seat 1 in the state shown in FIG. 1B, the back side of the paper surface is the front side, the front side of the paper surface is the rear side, the upper side of the paper surface is the upper side, and the lower side of the paper surface. Will be described as the lower side, the right side of the paper as the right side, and the left side of the paper as the left side. Further, the arrows FB, UD, and LR in the drawing indicate the front-rear direction, the up-down direction, and the left-right direction of the vehicle seat 1, respectively.

Further, in FIG. 1B, there are two points, the vehicle floor 21 of the automobile 20 on which the vehicle seat 1 is arranged, and the inner side surface 22 on one side of the automobile 20 in the vehicle width direction (arrow LR direction). It is schematically illustrated by a chain line.

As shown in FIG. 1, the vehicle seat 1 is a seat mounted on the automobile 20. The vehicle seat 1 includes a seat cushion 2 on which the seated person is seated, a seat back 3 which is a backrest of the seated person, a headrest 4 which supports the head of the seated person, and a front leg arranged below the seat cushion 2. A bracket 5 and a rear leg bracket 10 are provided.

The front leg bracket 5 and the rear leg bracket 10 are members for fixing the vehicle seat 1 to the vehicle floor 21 of the automobile 20, and the front leg brackets 5 are arranged at two locations in front of the seat cushion 2 (in the direction of arrow F). The rear leg brackets 10 are provided at two locations behind the seat cushion 2 (in the direction of arrow B). The front leg bracket 5 and the rear leg bracket 10 are made of a metal material. The front leg bracket 5 and the rear leg bracket 10 dispose of the seat cushion 2 of the vehicle seat 1 with a gap between the seat cushion 2 and the vehicle floor 21 of the automobile 20.

Further, a part of the vehicle floor 21 on which the vehicle seat 1 is arranged above is located on the front side (arrow F direction side) above the rear side (arrow B direction side) (arrow U direction). Further, the front leg bracket 5 is formed smaller (shorter) than the rear leg bracket 10 in the vertical direction (arrow UD direction). As a result, the lower surface of the seat cushion 2 can be arranged parallel to the horizontal direction.

Next, the rear leg bracket 10 will be described with reference to FIGS. 2 and 3. 2A is a rear view of the rear leg bracket 10, FIG. 2B is a side view of the rear leg bracket 10 in the direction of arrow IIb of FIG. 2A, and FIG. 2C is a side view of the rear leg bracket 10. Is a cross-sectional view of the rear leg bracket 10 on the line IIc-IIc of FIG. 2 (a). 3A is a top view of the rear leg bracket 10, FIG. 3B is a bottom view of the rear leg bracket 10, and FIG. 3C is IIIc-IIIc of FIG. 2A. It is sectional drawing of the rear leg bracket 10 in line.

As shown in FIGS. 2 and 3, the rear leg bracket 10 has a seat-side fastening portion 11 fastened to the seat cushion 2 of the vehicle seat 1 and a rear side (arrow B direction side) of the seat-side fastening portion 11. ), The vehicle floor side fastening portion 12 to be fastened to the vehicle floor 21, the connecting portion 13 connecting the seat side fastening portion 11 and the vehicle floor side fastening portion 12, and the vehicle width direction from the vehicle floor side fastening portion 12 and the connecting portion 13. A flange portion 14 projecting from both outer sides (in the direction of arrow LR) is provided.

The seat-side fastening portion 11 is a pair of first fastening portions 11a whose upper surface is formed on a flat surface and a pair of first bending portions connected to both ends of the first fastening portion 11a in the vehicle width direction (arrow LR direction). Mainly includes a portion 11b.

The first fastening portion 11a is a portion to be fastened to the lower surface of the seat cushion 2, and is formed in a plate shape facing the lower surface of the seat cushion 2. Further, the first fastening portion 11a is provided with through holes 11a1 penetrating in the direction of gravity (arrow UD direction) at two locations.

As a result, a bolt (not shown) through which the through hole 11a1 is inserted from the lower side (arrow D direction side) to the upper side (arrow U direction side) of the first fastening portion 11a is inserted into the lower surface (seat cushion 2) of the seat cushion 2. The first fastening portion 11a and the seat cushion 2 can be fastened by fastening the frame 2a (see FIG. 1).

The first bent portion 11b is bent into a substantially U-shaped cross section, and one end side of the substantially U-shaped cross section is the first fastening portion 11a in a state where the open side having a substantially U-shaped cross section faces upward (the side in the direction of the arrow U). It is connected to the outer end portion in the vehicle width direction (arrow LR direction). Therefore, since both ends of the seat-side fastening portion 11 are bent by the first bending portion 11b, the rigidity of the seat-side fastening portion 11 can be improved. Therefore, it is possible to prevent the first fastening portion 11a from bending due to the load input to the seat-side fastening portion 11 when the automobile 20 is traveling. As a result, it is possible to prevent the first fastening portion 11a from being plastically deformed and the seat cushion 2 from being displaced with respect to the seat side fastening portion 11 (rear leg bracket 10).

Further, in the first bent portion 11b, the end portion on the other end side having a substantially U-shaped cross section extends upward (in the direction of arrow U) from the first fastening portion 11a (end portion on the one end side). As a result, a space can be formed between the pair of first bent portions 11b facing each other on the other end side.

The distance T1 (see FIG. 2B) between the pair of first bent portions 11b on the other end side is a frame for fastening a bolt (not shown) through which the through hole 11a1 of the first fastening portion 11a is inserted. It is set to be substantially the same as the width T2 (see FIG. 1B) in the vehicle width direction (arrow LR direction) of 2a (see FIG. 1B) (T1 = T2). As a result, the frame 2a constituting the seat cushion 2 can be sandwiched between the opposite ends of the pair of first bent portions 11b on the other end side.

As a result, it is possible to prevent the seat cushion 2 from being displaced with respect to the seat side fastening portion 11 (rear leg bracket 10) due to the load input to the seat side fastening portion 11 when the automobile 20 is traveling. Further, the positioning when the rear leg bracket 10 is fastened to the seat cushion 2 can be simplified, and the efficiency of the assembly work of the vehicle seat 1 can be improved.

The vehicle floor side fastening portion 12 is erected from both ends of the second fastening portion 12a whose lower surface is formed on a flat surface and the second fastening portion 12a in the vehicle width direction (arrow LR direction). A portion 12b and a second erection portion 12c erected at an end portion on the rear side (arrow B direction side) are mainly provided.

The second fastening portion 12a is a portion to be fastened to the vehicle floor 21 of the automobile 20, and is formed in a plate shape facing the upper surface of the vehicle floor 21. Further, the second fastening portion 12a has a second through hole 12a1 penetrating in the direction of gravity and a protruding portion 12a2 protruding forward from the edge portion on the first fastening portion 11a side (front side (arrow F direction side)). And mainly prepare.

The second fastening portion 12a is formed by inserting a bolt (not shown) from the upper side (arrow U direction side) to the lower side (arrow D side direction side) of the second fastening portion 12a into the second through hole 12a1. By fastening the bolt to the vehicle floor 21, it is fastened to the vehicle floor 21. The second fastening portion 12a has a substantially rectangular contact surface with the upper surface of the vehicle floor 21 excluding the protruding portion 12a2.

The protruding portions 12a2 are formed at two locations on both outer sides of the edge portion of the second fastening portion 12a on the first fastening portion 11a side (front side) in the vehicle width direction (arrow LR direction). Further, the projecting portion 12a2 has a surface facing the vehicle floor 21 formed in a substantially triangular shape, and the surface facing the vehicle floor 21 comes into contact with the upper surface of the vehicle floor 21.

The first erection portion 12b and the second erection portion 12c are erected vertically upward (toward the arrow U direction). Further, the lower end of the connecting portion 13 described later is connected to the front side (arrow F direction side) of the second fastening portion 12a. Therefore, the second fastening portion 12a is surrounded on the upper side by the first standing portion 12b, the second standing portion 12c, and the connecting portion 13. As a result, it is possible to prevent a person riding in the automobile 20 from coming into contact with the head of a bolt (not shown) that is fastened to the vehicle floor 21 through the second through hole 12a1 of the second fastening portion 12a and injured. ..

The connecting portion 13 includes a main body portion 13a formed in a rectangular plate shape, and a second bent portion 13b formed by bending at both ends of the main body portion 13a in the vehicle width direction (arrow LR direction).

One end side (upper side) of the main body portion 13a in the longitudinal direction is connected to the rear side (arrow B direction side) end portion of the first fastening portion 11a of the seat side fastening portion 11, and the other end side (lower side) in the longitudinal direction is connected. ) Is connected to the front end (arrow F direction side) end of the second fastening portion 12a of the vehicle floor side fastening portion 12. The connecting portion between the main body portion 13a and the first fastening portion 11a or the second fastening portion 12a is curved and connected.

Further, the main body portion 13a is connected to a front side end portion (a front side end portion of the second fastening portion 12a other than the protruding portion 12a2) between the pair of protruding portions 12a2 of the second fastening portion 12a facing each other. As a result, the lower end portion of the second bent portion 13b, which will be described later, can be connected to the protruding portion 12a2 of the second fastening portion 12a.

The second bent portion 13b is bent in a substantially U-shaped cross section, and one end side of the substantially U-shaped cross section is the main body portion 13a with the release side having a substantially U-shaped cross section facing the rear side (the side in the direction of arrow B). It is connected to the end in the vehicle width direction (arrow LR direction).

Further, in the second bent portion 13b, the end portion on the upper side (arrow U direction side) is connected to the end portion on the rear side (arrow B direction side) of the first bent portion 11b of the seat side fastening portion 11. That is, since the substantially U-shaped cross sections of the second bent portion 13b and the first bent portion 11b whose cross-sectional coefficients are increased are connected to each other, the rigidity of the connecting portion between the seat side fastening portion 11 and the connecting portion 13 is increased. be able to. As a result, the connecting portion 13 is tilted toward the vehicle floor 21 side due to the load of the vehicle seat 1, and the arrangement of the seat side fastening portion 11 with respect to the connecting portion 13 is displaced (the connecting portion 13 and the seat side fastening portion 11 in the side view). The connection angle of) can be suppressed.

Further, in the second bent portion 13b, the other end side having a substantially U-shaped cross section (the side opposite to the connecting side with the main body portion 13a) is connected to the first standing portion 12b of the vehicle floor side fastening portion 12. That is, since the bent portions of the vehicle floor side fastening portion 12 and the connecting portion 13 whose cross-sectional coefficient is increased are connected to each other, the rigidity of the connecting portion between the vehicle floor side fastening portion 12 and the connecting portion 13 can be increased. As a result, the connecting portion 13 is tilted toward the vehicle floor 21 side due to the load of the vehicle seat 1, and the arrangement of the connecting portion 13 with respect to the vehicle floor side fastening portion 12 is displaced (the connecting portion 13 and the vehicle floor side fastening portion 12 in the side view). The connection angle of) can be suppressed.

The pair of flange portions 14 are provided in the vehicle width direction (arrow LR) from the other end of the second bent portion 13b (the end opposite to the connecting side with the main body portion 13a) and the standing tip of the first standing portion 12b. Direction) It is formed so as to project outward. As a result, the rigidity of the connecting portion of the connecting portion 13 and the vehicle floor side fastening portion 12 can be ensured, and the connecting portion 13 can be prevented from bending with respect to the vehicle floor side fastening portion 12 in the vehicle width direction. As a result, it is possible to prevent the connecting portion 13 from tilting in the vehicle width direction with respect to the vehicle floor side fastening portion 12 due to the load from the vehicle side.

According to the rear leg bracket 10 configured as described above, since the protruding portion 12a2 is formed on the edge portion on the first fastening portion 11a side (front side), it is for a vehicle transmitted via the connecting portion 13. The load of the sheet 1 makes it easier for the protrusion 12a2 to be pressed downward. As a result, the normal force acting on the protrusion 12a2 from the vehicle floor 21 can be increased. Therefore, the frictional resistance between the vehicle floor side fastening portion 12 and the vehicle floor 21 can be increased, and the rotation of the rear leg bracket 10 with respect to the vehicle floor 21 can be suppressed. As a result, when a load is applied to the automobile 20 from the vehicle side, it is possible to prevent the connecting portion 13 of the rear leg bracket 10 from tilting toward the vehicle floor 21 side.

Further, since the protruding portions 12a2 are formed at two locations on both outer ends of the second fastening portion 12a in the vehicle width direction (arrow LR direction), the front side of the second fastening portion 12a (arrow F direction side). ), At least one of the pair of protruding portions 12a2 can be formed at a position as far as possible from the fastening position (second through hole 12a1) between the second fastening portion 12a and the vehicle floor 21. Therefore, it is possible to increase the force required when the vehicle floor side fastening portion 12 rotates around the fastening position with the vehicle floor 21, and it is possible to suppress the rotation of the rear leg bracket 10 with respect to the vehicle floor 21.

A non-woven fabric is disposed on the upper surface of the vehicle floor 21 of the automobile 20, and the rear leg bracket 10 is easily bitten into the non-woven fabric by fastening the rear leg bracket 10 made of metal. Therefore, the second fastening portion 12a is fastened to the vehicle floor 21, and the upper surface of the vehicle floor 21 is pressed against the second fastening portion 12a, so that the contact portion of the vehicle floor 21 with the second fastening portion 12a bites downward. Therefore, the upper surface of the vehicle floor 21 can be brought into contact with the side surface of the second fastening portion 12a by that amount. This makes it easier to prevent the second fastening portion 12a from rotating with respect to the vehicle floor 21. As a result, when a load is applied to the automobile 20 from the vehicle side, it is possible to prevent the connecting portion 13 of the rear leg bracket 10 from tilting toward the vehicle floor 21 side.

Further, as described above, the protruding portion 12a2 of the second fastening portion 12a that abuts on the vehicle floor 21 is formed so as to partially project on the contact surface with the vehicle floor 21 at a position that is radially away from the fastening portion. When the second fastening portion 12a rotates with respect to the vehicle floor 21, the upper surface of the vehicle floor 21 is easily brought into contact with the side surface of the second fastening portion 12a, and the second fastening portion 12a rotates with respect to the vehicle floor 21. Resistance can be increased. This makes it easier to prevent the second fastening portion 12a from rotating with respect to the vehicle floor 21. As a result, when a load is applied to the automobile 20 from the vehicle side, it is possible to prevent the connecting portion 13 of the rear leg bracket 10 from tilting toward the vehicle floor 21 side.

Further, the vehicle floor side fastening portion 12 can secure the rigidity of the second fastening portion 12a by the first standing portion 12b, the second standing portion 12c, and the connecting portion 13, so that the vehicle seat can be secured via the connecting portion 13. When the load of 1 is input to the second fastening portion 12a, it is possible to prevent only the protruding portion 12a2 of the second fastening portion 12a from bending downward. As a result, the load of the vehicle seat 1 can be easily applied to the entire contact surface of the second fastening portion 12a with the vehicle floor 21 via the connecting portion 13, and the entire second fastening portion 12a bites into the upper surface of the vehicle floor 21. It can be made easy. Therefore, it is possible to easily prevent the second fastening portion 12a from rotating with respect to the vehicle floor 21. As a result, when a load is applied to the automobile 20 from the vehicle side, it is possible to prevent the connecting portion 13 of the rear leg bracket 10 from tilting toward the vehicle floor 21 side.

Further, since both ends of the connecting portion 13 are bent by the second bent portion 13b in the vehicle width direction, the rigidity of the connecting portion 13 can be improved. As a result, it is possible to prevent the connecting portion 13 from bending due to the load input to the connecting portion 13 when the automobile 20 is traveling.

Therefore, the load of the vehicle seat 1 transmitted to the projecting portion 12a2 via the connecting portion 13 is concentrated on a part (one) of the projecting portion 12a2 via a part of the connecting portion 13 to act on the vehicle floor. It is possible to prevent the contact surface of the side fastening portion 12 with the vehicle floor 21 from being tilted so that the area where the second fastening portion 12a bites into the upper surface of the vehicle floor 21 becomes small. As a result, when a load is applied to the automobile 20 from the vehicle side, it is possible to prevent the connecting portion 13 of the rear leg bracket 10 from tilting toward the vehicle floor 21 side.

Further, the lower end (arrow D direction side) of the second bent portion 13b is connected to the protruding portion 12a2 of the vehicle floor side fastening portion 12. Therefore, since the portion where the rigidity of the connecting portion 13 is increased by the second bending portion 13b is connected to the protruding portion 12a2 of the vehicle floor side fastening portion 12, the load of the vehicle seat 1 is increased by the second bending portion 13b. It can be easily transmitted to the projecting portion 12a2 via the above. As a result, the protrusion 12a2 can be easily pushed down toward the vehicle floor 21 by the load of the vehicle seat 1. As a result, the frictional resistance between the vehicle floor side fastening portion 12 and the vehicle floor 21 can be increased, and the rotation of the rear leg bracket 10 with respect to the vehicle floor 21 can be easily suppressed.

Further, in the second bent portion 13b, the cross section of the connecting portion with the vehicle floor side fastening portion 12 is formed in a shape along the edge portion of the tip end portion of the protrusion portion 12a2, and extends over the entire area of the protrusion end end side edge portion of the protrusion portion 12a2. Is connected. Therefore, as compared with the case where the second bent portion 13b is connected to the inside of the protruding portion 12a2, the protruding tip of the protruding portion 12a2 is subjected to the load of the vehicle seat 1 transmitted to the protruding portion 12a2 via the second bent portion 13b. The side edge can be easily pushed down. As a result, the frictional resistance between the vehicle floor side fastening portion 12 and the vehicle floor 21 can be increased, and the rotation of the rear leg bracket 10 with respect to the vehicle floor 21 can be easily suppressed.

In the pair of flange portions 14, the flange portion 14 on one side (right side in FIG. 2A) is formed shorter than the flange portion 14 on the other side (left side in FIG. 2A). Therefore, since the flange portion on one side is formed shorter, the rigidity of the connecting portion 13 is lowered, so that the rear leg bracket 10 is moved to one side of the flange portion 14 (on the right side in FIG. 2A) due to the load from the vehicle side. In this embodiment, the inner side surface 22 on one side of the automobile 20 is arranged at a position adjacent to one side of the flange portion 14 of the vehicle seat 1 where buckling (tilting) is likely to occur (FIG. 1 (b)). reference).

As a result, it is possible to regulate that the connecting portion 13 of the rear leg bracket 10 buckles to one side of the automobile 20 due to the load from the side of the vehicle by bringing the vehicle seat 1 into contact with the inner side surface 22 of the automobile 20. Therefore, it is not necessary to increase the rigidity of the connecting portion 13 with respect to the displacement of one side of the automobile 20, and the rear leg bracket 10 is reduced in size by that amount, the manufacturing cost of the rear leg bracket 10 is reduced, and the weight of the rear leg bracket 10 is reduced. Can be achieved.

That is, when the connecting portion 13 buckles in the vehicle width direction, the load of the vehicle seat 1 tends to act in the direction of further buckling the connecting portion 13, and the connecting portion 13 may continuously buckle. There is. Therefore, when the buckling of the connecting portion 13 is not regulated, it is necessary to increase the rigidity of the connecting portion 13 to suppress the buckling of the connecting portion 13.

In the present embodiment, when the vehicle seat 1 is arranged adjacent to the inner side surface 22 on one side of the automobile 20 (state shown in FIG. 1B), the seat 1 is arranged from the inner side surface 22 on one side of the automobile 20. Where it is difficult to suppress the buckling of the connecting portion 13 in the away direction on the inner surface of the automobile 20, the flange portion 14 in the direction away from the inner side surface 22 (on the other side) is in the direction closer to the inner side surface 22. By forming the flange portion 14 (on one side) longer than the flange portion 14 to increase the rigidity, it is possible to prevent the connecting portion 13 from buckling.

On the other hand, the flange portion 14 on one side, which can regulate the buckling of the connecting portion 13 in the vehicle width direction by the inner side surface 22, is formed short to reduce the manufacturing cost of the rear leg bracket 10 and the weight of the rear leg bracket 10. And can be achieved.

Further, in the present embodiment, the longitudinal direction of the main body 13a of the connecting portion 13 is formed so as to be inclined in the vehicle width direction (arrow LR direction), and the longitudinal direction of the main body 13a is from the upper end. It inclines to the other side (left side of FIG. 2A) of the automobile 20 toward the lower end. As a result, it is possible to easily prevent the connecting portion 13 of the rear leg bracket 10 from tilting toward the other side of the automobile 20 due to the load from the side of the vehicle. The tilting of the connecting portion 13 toward one side of the automobile 20 can be regulated by bringing the vehicle seat 1 into contact with the inner side surface 22 as described above.

Further, as the main body 13a is inclined from the upper end (arrow U direction side) to the lower end (arrow D direction side), it is inclined to the other side (left side in FIG. 2A) of the automobile 20. , The vehicle floor side fastening portion 12 can be separated from the inner side surface 22 on one side of the automobile 20. As a result, the work space for fastening the vehicle floor side fastening portion 12 and the vehicle floor 21 with bolts (not shown) can be widened, and the bolt fastening work between the vehicle floor side fastening portion 12 and the vehicle floor 21 can be facilitated. ..

The rear leg bracket 10 configured as described above is formed by pressing a flat metal plate with a predetermined die. As described above, the second bent portion 13b is formed so that the cross section of the connecting portion with the vehicle floor side fastening portion 12 is formed along the edge of the tip of the protruding portion 12a2, so that the second bending portion 13 is bent. A pair of protruding portions 12a2 can be formed in the process of pressing the portions 13b. Therefore, it is not necessary to newly add a step for forming the pair of protruding portions 12a2 (for example, a step of forming only the pair of protruding portions 12a2 before forming the entire shape of the rear leg bracket 10 by press working). Therefore, it is possible to suppress an increase in manufacturing cost.

Although the present invention has been described above based on the above-described embodiment, the present invention is not limited to the above-described embodiment, and it is easy to make various modifications and improvements within a range that does not deviate from the gist of the present invention. It can be inferred.

In the first embodiment, the case where the rear leg bracket 10 is fastened to the seat cushion 2 and the vehicle floor 21 with bolts has been described, but the present invention is not necessarily limited to this, and the rear leg bracket 10 is attached to the seat cushion 2 and the vehicle floor 21. Anything that is fixed (fastened) may be used. For example, the rear leg bracket 10 may be fixed to the seat cushion 2 and the vehicle floor 21 by rivets or welding, or may be another means.

In the first embodiment, the rear leg bracket 10 arranged on the rear side of the seat cushion 2 has been described as an example, but the present invention is not necessarily limited to this, and the front side of the seat cushion 2 (the side in the direction of the arrow F side). The front leg bracket 5 on the front side arranged in) is shortened in the vertical direction (arrow UD direction) of the connecting portion 13 of the rear leg bracket 10 described above to form the rear leg bracket 10 in which the front-rear direction is inverted. It may be replaced.

In the first embodiment, the vehicle seat 1 arranged on one side in the vehicle width direction (arrow LR direction) of the automobile 20 has been described, but the vehicle seat 1 is in the vehicle width direction of the automobile 20. It may be arranged on the other side. In this case, the rear leg bracket 10 preferably has the above-mentioned rear leg bracket 10 formed in a symmetrical shape.

In the first embodiment, the case where the vehicle seat 1 is arranged toward the front side (arrow F direction side) (the seat back 3 is arranged at the rear side (arrow B direction side) of the seat cushion 2) has been described. , Not necessarily limited to this, for example, the vehicle seat 1 is arranged in the vehicle width direction (arrow LR direction) (the seat back 3 is arranged adjacent to the seat cushion 2 in the vehicle width direction). You may. In this case, it is possible to easily prevent the rear leg bracket 10 from rotating due to a load from the front or the rear of the automobile 20.

In the first embodiment, the case where the vehicle seat 1 is mounted on the automobile 20 has been described, but the present invention is not necessarily limited to this, and the vehicle seat 1 is mounted on a railroad vehicle, an aircraft, or the like. There may be.

1 Vehicle seat 10 Rear leg bracket (leg bracket)
11 Seat side fastening part 12 Vehicle floor side fastening part 12a2 Protruding part 12b First standing part (standing part)
13 Connecting part 13b Second bent part (bent part)
14 Flange part 20 Automobile (vehicle)
21 Car floor 22 Inner surface

Claims (5)

A seat-side fastening portion to be fastened to a vehicle seat, a vehicle floor-side fastening portion formed at different positions in the front-rear direction of the seat-side fastening portion and the vehicle, and a vehicle floor-side fastening portion to be fastened to the vehicle floor, the seat-side fastening portion, and the vehicle floor side. In a leg bracket provided with a connecting portion for connecting the fastening portions,
The vehicle floor side fastening portion includes a projecting portion that protrudes in the front-rear direction of the vehicle.
Its projections, facing surfaces of said vehicle floor in contact with the upper surface of the vehicle floor, the vehicle width direction of the formed at an edge portion of the sheet-side engagement portion Rutotomoni the vehicle floor side engagement portion of the vehicle floor side fastening portion It is formed in two places on both outer ends of the
The connecting portion includes a pair of bent portions on both outer edges in the vehicle width direction, at least a part of which is bent toward the protruding direction of the protruding portion, and the pair of bent portions are provided from the seat side fastening portion. the vehicle floor side to extend over the fastening portion, the leg bracket, wherein Rukoto connected to the pair of projecting portions, respectively. The bent portion is formed so that the cross section of the connecting portion with the vehicle floor side fastening portion is formed in a shape along the edge portion on the protruding tip side of the protruding portion, and is connected over the entire area of the protruding tip side edge portion of the protruding portion. The leg bracket according to claim 1 , wherein the leg bracket is made. The pair of erecting portions that are erected vertically upward from both outer edges of the vehicle floor side fastening portion in the vehicle width direction and are connected to the pair of bent portions, the pair of erecting portions, and the above. The leg bracket according to claim 2 , further comprising a pair of flange portions projecting from the pair of bent portions toward both outer sides in the vehicle width direction. The flange portion of one side of the pair of flange portions, as compared to the flange portion of the other side, is shorter in length in the direction in which the connecting portion for connecting the seat-side engagement portion and the vehicle floor side fastening portion leg bracket according to claim 3, characterized in that it is formed. A vehicle seat comprising the leg bracket according to any one of claims 1 to 4.

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