JP7310086B2 - Seat frame assembly and vehicle seat device - Google Patents

Description

The present invention relates to a seat frame assembly and a vehicle seat device.

A vehicle seat device is installed in a vehicle by slidably supporting a vehicle seat including a seat cushion and a seat back on a seat rail and attaching the seat rail to a floor panel via a seat leg or the like. .

In the event of a side collision of the vehicle, an inertial force in the vehicle width direction acts on the vehicle seat installed in the vehicle interior, tilting one end in the vehicle width direction downward and tilting the other end in the vehicle width direction upward. A tilting moment acts. Therefore, a vehicle seat device is required to suppress the inclination (sinking (displacement) amount) of the vehicle seat at the time of a side collision of the vehicle.

JP 2019-10904 A

By the way, the seat rails are attached to the floor panel of the vehicle via the seat legs. ) position may be offset in the vehicle width direction. As described above, the seat leg in which the fastening position to the floor panel and the fastening position to the seat rail are offset in the vehicle width direction has room for improvement in terms of rigidity.

When the seat leg supports the seat rail as described above, it may be difficult to suppress the sinking displacement of the vehicle seat, that is, the seat rail, in the event of a side collision of the vehicle.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat frame assembly and a vehicle seat device that prevent or suppress tilting of a vehicle seat in the event of a side collision of a vehicle.

A seat frame assembly according to a first aspect includes a seat frame that constitutes a vehicle seat, and a seat frame that supports the seat frame so as to be movable in the seat front-rear direction, and extends in the seat front-rear direction at the seat width direction inner side and the seat width direction outer side, respectively. a pair of seat rails that are present, a first outer support portion attached to the lower surface of the seat rail on the seat rear side on the seat width direction outer side, and a floor panel of the vehicle on the seat width direction inner side of the first outer support portion a second outer supporting portion to be attached; and a connecting pipe extending in the seat width direction below the seat rail on the outer side in the seat width direction and connecting the first outer supporting portion and the second outer supporting portion. Prepare.

A vehicle seat device including a vehicle seat is manufactured from this seat frame assembly, and the vehicle seat device is installed in the vehicle interior (on the floor panel) facing the front of the vehicle.

As a result, the vehicle rear side of the seat rail on the vehicle width direction outer side is supported by the first outer support portion and the second outer support portion attached to the floor panel via the connecting pipe. Hereinafter, the portion where the first outer support portion and the second outer support portion are connected via the connecting pipe will be referred to as the "outer support portion".

Thus, the outer support is divided into a first outer support attached to the seat rail and a second outer support attached to the floor panel, the first outer support and the second outer support being connected to the vehicle. They are connected via a connecting pipe extending in the width direction. Therefore, even if the mounting position to the seat rail and the mounting position to the floor panel are offset in the vehicle width direction in the outer support part that supports the rear part of the seat rail on the vehicle width direction outer side, the outer support part has sufficient rigidity. can be secured.

Therefore, in the event of a side collision of the vehicle, the inertial force acting on the vehicle seat from the inner side to the outer side in the vehicle width direction displaces the outer side of the vehicle seat (seat frame) downward in the vehicle width direction. Since the outer support portion that supports the seat rail on the outer side in the vehicle width direction that supports the seat (seat frame) has sufficient rigidity, the displacement of the seat rail on the outer side in the vehicle width direction, that is, the displacement of the vehicle seat (seat frame) Inclination (subduction displacement) is suppressed.

A seat frame assembly according to a second aspect is the seat frame assembly according to the first aspect , further comprising an inner supporting portion attached to the floor panel and supporting the seat rear side of the seat rail on the inner side in the seat width direction. , the connecting pipe connects the first outer supporting part, the second outer supporting part and the inner supporting part.

In this seat frame assembly, the connecting pipe connects the inner supporting portion that supports the seat rail on the inner side in the vehicle width direction, the first outer supporting portion, and the second outer supporting portion. Therefore, the vehicle width direction rigidity of the seat frame assembly is further improved.

As a result, a vehicle in which a vehicle seat of a vehicle seat device manufactured from such a seat assembly is installed is side-collided, and an inertial force acts on the vehicle seat from the inner side to the outer side in the vehicle width direction. Also, since the rigidity of the seat frame assembly in the vehicle width direction is further improved, the displacement of the seat rails on the outside in the vehicle width direction is further suppressed.

That is, the inclination (sinking displacement) of the vehicle seat (seat frame) is prevented or further suppressed in the event of a side collision of the vehicle.

A seat frame assembly according to a third aspect is the seat frame assembly according to the second aspect , wherein the connecting pipes support another pair of seats that support another seat frame adjacent to the seat width direction inner side of the seat frame. It is also connected to another inner support part, another first outer support part, and another second outer support part that support the rail.

The connecting pipe of the seat frame assembly is connected to another inner support portion, another first outer support portion, and another second outer support portion of another pair of seat rails supporting another seat frame adjacent to the seat frame. are also connected. Therefore, the vehicle width direction rigidity of the seat frame assembly is further improved.

As a result, a vehicle in which a vehicle seat of a vehicle seat device manufactured from such a seat assembly is installed is side-collided, and an inertial force acts on the vehicle seat from the inner side to the outer side in the vehicle width direction. Also, since the rigidity of the seat frame assembly in the vehicle width direction is further improved, the displacement of the seat rails on the outside in the vehicle width direction is further suppressed.

That is, the inclination (sinking displacement) of the vehicle seat (seat frame) is prevented or further suppressed in the event of a side collision of the vehicle.

In a seat frame assembly of a fourth aspect , in the seat frame assembly of the second aspect or the third aspect , the first outer support portion, the second outer support portion, and the inner support portion each include a seat A connecting pipe accommodating portion that opens upward is formed, and the connecting pipe accommodated in the connecting pipe accommodating portion is joined to the first outer supporting portion, the second outer supporting portion, and the inner supporting portion. The first outer support portion, the second outer support portion, and the inner support portion are connected by

In this seat frame assembly, the inner support portion, the first outer support portion, and the second outer support portion are each formed with a connecting pipe accommodating portion that opens toward the upper side of the seat. The inner support portion, the first outer support portion, and the second outer support portion are connected by joining the connection pipe accommodated in the connection pipe accommodation portion with the inner support portion, the first outer support portion, and the second outer support portion. connected by a pipe.

That is, since the inner support portion, the first outer support portion, and the second outer support portion are formed with the connecting pipe accommodating portions that are open to the upper side of the seat, the inner support portion, the first outer support portion, and the second outer support portion are formed in the seat frame assembly. When attaching the second outer support part, it is easy to attach the connecting pipe.

A seat frame assembly according to a fifth aspect is the seat frame assembly according to the third aspect or a fourth aspect depending on the third aspect, wherein the inner support portion and the other inner support portion are integrated. ing.

A connecting pipe extends to another inner support portion that supports another pair of seat rails that support another seat frame that is adjacent to the seat frame in the seat width direction, another second outer support portion, and another first outer support portion. When connected, the inner support is integrated with the other inner support. As a result, the number of parts of the seat frame assembly can be reduced.

In a seat frame assembly according to a sixth aspect , in the seat frame assembly according to any one of the first aspect to the fifth aspect , the seat rail on the seat width direction outer side is arranged in the seat frame in the seat width direction. It is disposed on the inner side in the seat width direction of the seat cushion side frame positioned on the outer side.

A vehicle seat device including a vehicle seat is manufactured from this seat frame assembly, and the vehicle seat device is installed in a vehicle interior facing the front of the vehicle.

In the vehicle seat device, the seat rail positioned on the vehicle width direction outer side is positioned on the vehicle width direction inner side than the seat cushion side frame positioned on the vehicle width direction outer side of the vehicle seat (seat frame). In this way, when the seat rails on the outer side in the vehicle width direction are positioned (offset) inward in the vehicle width direction from the seat cushion side frames on the outer side in the vehicle width direction, the vehicle The vehicle seat (seat frame) tends to tilt in the event of a side collision.

However, the outer support of the seat frame assembly is divided into a first outer support attached to the seat rail and a second outer support attached to the floor panel, the first outer support and the second outer support. are connected via a connecting pipe extending in the vehicle width direction. Therefore, even if the mounting position to the seat rail and the mounting position to the floor panel are offset in the vehicle width direction in the outer support part that supports the rear part of the seat rail on the vehicle width direction outer side, the outer support part has sufficient rigidity. can be secured.

Therefore, in the event of a side collision of the vehicle, the outer side of the vehicle seat (seat frame) in the vehicle width direction sinks downward due to the action of the inertial force acting on the vehicle seat, and the seat rail on the outer side in the vehicle width direction is displaced downward in the vehicle. In other words, the inclination (sinking displacement) of the vehicle seat (seat frame) can be prevented or suppressed.

A seat frame assembly according to a seventh aspect is the seat frame assembly according to any one of the first to sixth aspects , wherein the seat frame is provided with a mounting portion for mounting a connector of a child seat. ing.

Even if the connector of the child seat is attached to the attachment portion of the seat frame assembly, that is, even if the child seat is attached to the vehicle seat of the vehicle seat device manufactured from the seat assembly, the width of the vehicle at the time of a side collision of the vehicle is reduced. By supporting the seat rail on the outer side of the direction on the outer support portion, the inclination (sinking displacement) of the vehicle seat (seat frame) is suppressed, and the amount of displacement of the child seat attached to the vehicle seat (seat frame) is reduced. Suppressed.

Eighth aspectThe vehicle seat device ofAny one aspect of the first aspect to the seventh aspecta seat frame assembly, a seat pad attached to the seat frame constituting the seat frame assembly, and a skin covering the surface of the seat pad.

This vehicle seat device includes a vehicle seat formed by attaching a seat pad and an upholstery to a seat frame constituting a seat frame assembly. Therefore, by installing this vehicle seat device (vehicle seat) in the vehicle interior facing the front of the vehicle, the vehicle rear side of the seat rail on the outside in the vehicle width direction is connected to the outside support portion, that is, the first outside support portion. It is supported by a second outer support attached to the floor panel via a pipe.

Thus, the outer support is divided into a first outer support attached to the seat rail and a second outer support attached to the floor panel, the first outer support and the second outer support being connected to the vehicle. They are connected via a connecting pipe extending in the width direction. Therefore, even if the mounting position to the seat rail and the mounting position to the floor panel are offset in the vehicle width direction in the outer support part that supports the rear part of the seat rail on the vehicle width direction outer side, the outer support part has sufficient rigidity. can be secured.

Therefore, in the event of a side collision of the vehicle, the vehicle seat is displaced downward in the vehicle width direction due to the action of the inertial force acting on the vehicle seat from the vehicle width direction inner side to the vehicle width direction outer side, but the vehicle seat is supported. Since the outer support portion that supports the seat rail on the outer side in the vehicle width direction has sufficient rigidity, displacement of the seat rail on the outer side in the vehicle width direction, that is, inclination (sinking displacement) of the vehicle seat is suppressed.

As described above, the seat frame assembly according to claims 1 to 6 and the vehicle seat device according to claim 8 can prevent or suppress the inclination of the vehicle seat in the event of a side collision of the vehicle.

In the seat frame assembly according to claim 7, the amount of displacement of the child seat attached to the vehicle seat is suppressed in the event of a side collision of the vehicle.

1 is a side view showing a schematic configuration of a vehicle seat device according to one embodiment; FIG. FIG. 2 is a perspective view of the seat frame assembly according to one embodiment, viewed obliquely from the rear right and above. FIG. 2 is a perspective view of the seat frame assembly according to one embodiment, viewed from the lower left rearward direction; FIG. 2 is a rear view of the seat frame assembly according to one embodiment, viewed from the rear of the vehicle; FIG. 4 is a perspective view seen obliquely from above showing a rear leg portion according to one embodiment; It is the perspective view which looked at the diagonally downward direction which shows the rear leg part which concerns on one Embodiment. FIG. 4 is an exploded perspective view showing a rear leg portion according to one embodiment; FIG. 4 is a side view of a main part showing the relationship between a rear leg portion and a seat rail according to one embodiment;

A seat frame assembly including seat rails and a vehicle seat device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG. It should be noted that each figure is a schematic one, and those that have little relevance to the present invention are omitted from the illustration.

In the present embodiment, "seat front", "seat width direction", and "seat top" correspond to "vehicle front", "vehicle width direction", and "vehicle top", respectively. Description will be made by unifying the descriptions in the "vehicle width direction" and "vehicle top".

In each figure, the arrow FR indicates the front of the vehicle, the arrow W indicates the width direction of the vehicle, the arrow UP indicates the upper side of the vehicle, the arrow RH indicates the right side in the width direction of the vehicle, and the arrow LH indicates the left side in the width direction of the vehicle.

(composition)
As shown in FIG. 1, a vehicle seat device 10 according to the present embodiment is installed in a passenger compartment as a rear seat of a vehicle.

As shown in FIGS. 1 to 4, the vehicle seat device 10 includes two sets of vehicle seats 12A and 12B arranged adjacent to each other in the vehicle width direction, and two sets of vehicle seats 12A and 12B arranged in the vehicle. Two pairs of seat rails 14A, 16A, 14B, 16B supported so as to be displaceable in the longitudinal direction, front leg portions 18 supporting vehicle front side ends of the seat rails 14A, 16A, 14B, 16B, and vehicle rear side ends. a rear leg portion 22 that supports the

As shown in FIG. 1, the vehicle seat 12A includes a seat cushion 30 on which a passenger sits, a seat back 32 that supports the back of the passenger at the rear end of the seat cushion 30, and an upper end of the seat back 32. and a headrest 34 for supporting the head of the occupant.

The seat cushion 30 and the seat back 32 are formed by attaching a seat pad 36 to a seat frame 40A, which will be described later, and covering it with a skin 38. As shown in FIG.

As shown in FIG. 2, the seat frame 40A that constitutes the vehicle seat 12A includes a seat cushion frame 42 that constitutes the seat cushion 30, a seat back frame 44 that constitutes the seat back 32, and a pair of seat rails, which will be described later. and a rail connection portion 46 that connects the .

In the following description, the right side in the vehicle width direction of the seat frame 40A may be referred to as the outer side in the vehicle width direction, and the left side in the vehicle width direction may be referred to as the inner side in the vehicle width direction. Further, regarding the seat frame 40B described later, the right side in the vehicle width direction may be referred to as the inner side in the vehicle width direction, and the left side in the vehicle width direction may be referred to as the outer side in the vehicle width direction.

The seat cushion frame 42 has a pair of seat cushion side frames 48A, 48B and a seat cushion front frame 50. As shown in FIG.

The pair of seat cushion side frames 48A and 48B extend in the vehicle front-rear direction at the vehicle width direction inner end and the vehicle width direction outer end (hereinafter referred to as "vehicle width direction both ends") of the seat cushion 30, respectively. there is Further, the vehicle front side end portions of the seat cushion side frames 48A and 48B are connected by a seat cushion front frame 50 extending in the vehicle width direction. The seat rear side end portions of the seat cushion side frames 48A and 48B are connected to the lower end sides of seatback side frames 54A and 54B of the seatback frame 44, which will be described later.

The seatback frame 44 has a seatback upper frame 52 , seatback side frames 54A and 54B, and a seatback lower frame 56 .

The seat back upper frame 52 is substantially U-shaped, having an upper portion 58 extending in the vehicle width direction and side portions 60A and 60B extending downward from the vehicle width direction end portions of the upper portion 58, respectively. .

The seatback side frames 54A, 54B extend in the vertical direction of the vehicle, and are connected to the lower ends of the side portions 60A, 60B at their vehicle upper side ends.

The seatback lower frame 56 extends in the vehicle width direction, and both ends thereof in the vehicle width direction are joined to the vehicle lower side of the seatback side frames 54A, 54B.

The vehicle rear side end portions of the seat cushion side frames 48A, 48B are fastened to the vehicle front side of the joining position of the seatback lower frame 56 of the seatback side frames 54A, 54B.

At corners where the seatback side frames 54A, 54B and the seatback lower frame 56 are joined, there are provided strikers 62A, 62B for attachment of child seat connectors. The strikers 62A, 62B correspond to "mounting portions".

The seat rails 14A, 16A have lower rails 70A, 70B, respectively, and upper rails 72A, 72B slidably provided on the lower rails 70A, 70B in the longitudinal direction of the vehicle.

The seat rail 14A is disposed on the vehicle width direction inner side of the seat rail 16A, and is positioned below the seat cushion side frame 48A.

On the other hand, the seat rail 16A is located on the outer side in the vehicle width direction of the seat rail 14A, but is offset to the inner side in the vehicle width direction of the lower side of the seat cushion side frame 48B.

Support portions 82A and 82B for supporting pipes 80 constituting the rail connecting portion 46 are fastened to the vehicle rear side of the upper surfaces of the upper rails 72A and 72B, respectively. The inner end portion of the pipe 80 in the vehicle width direction is inserted through and joined to the support portion 82A. A middle portion of the pipe 80 is placed and joined to the support portion 82B.

Further, the outer end portion of the pipe 80 in the vehicle width direction is inserted through and joined to the free hinge bracket 84B.

As shown in FIGS. 2 and 4, the free hinge bracket 84B is hinged on its upper side to the lower end of the seatback side frame 54B, and supports the seatback side frame 54B so as to swing.

A free hinge bracket 84A (see FIG. 4) substantially similar to the free hinge bracket 84B is arranged at the inner end of the pipe 80 in the vehicle width direction.

As shown in FIG. 4, seat rails 14B and 16B for a vehicle seat 12B adjacent to the vehicle seat 12A are arranged on the opposite side (the left side in the vehicle width direction) of the seat rails 14A and 16A in the vehicle width direction. is set.

2 and 3, the illustration of the seat frame 40B constituting the vehicle seat 12B is omitted in order to avoid complication of the drawings, and the lower rails 70C and 70D constituting the seat rails 14B and 16B are shown below the lower rails 70C and 70D. Only one side is shown. Further, in the seat frame 40B shown in FIG. 4, the same reference numerals are given to the same components as in the seat frame 40A, and detailed description thereof is omitted.

The front leg portion 18 that supports the vehicle front side of the seat rails 14A, 16A, 14B, 16B (lower rails 70A to 70D) has an inner leg 86 and outer legs 88A, 88B, as shown in FIGS. .

As shown in FIGS. 1 and 3, the inner leg 86 is attached to the floor panel 74 at the center of the vehicle seat device 10 in the vehicle width direction, and supports the front ends of the seat rails 14A and 14B. On the other hand, the outer legs 88A, 88B are attached to the floor panel 74 at both ends of the vehicle seat device 10 in the vehicle width direction, and support the front ends of the seat rails 16A, 16B.

5 to 7, the rear leg portion 22 that supports the vehicle rear side of the seat rails 14A, 16A, 14B, 16B (lower rails 70A to 70D) includes first outer legs 92A, 92B and second outer legs 92A, 92B. 94A, 94B, an inner leg 96 and a connecting pipe 98.

The first outer legs 92A and 92B respectively correspond to the "first outer supporting portion" and the "other first outer supporting portion". The second outer legs 94A and 94B respectively correspond to the "second outer supporting portion" and the "other second outer supporting portion". The inner leg 96 corresponds to the "inner support" and the "other inner support".

The first outer leg 92A is attached to the vehicle rear end side of the vehicle width direction outer seat rail 16A (lower rail 70B) that supports the vehicle seat 12A. The first outer leg 92A includes a U-shaped connecting pipe housing portion 100A that opens upwardly of the vehicle when viewed in the vehicle width direction, and flanges that extend forward and rearward of the vehicle from both ends of the connecting pipe housing portion 100A in the vehicle front-rear direction. It has parts 102A and 104A. By fastening the flange portions 102A and 104A to the lower surface 71B of the lower rail 70B, the first outer leg 92A is attached to the lower surface 71B of the lower rail 70B.

When the connecting pipe 98 is housed in the connecting pipe housing portion 100A and joined, the connecting pipe 98 is brought as close as possible to the lower surface 71B of the lower rail 70B while preventing the connecting pipe 98 from interfering (abutting) with the lower surface 71B of the lower rail 70B. (For example, the gap D (see FIG. 8) between the connecting pipe 98 and the lower surface 71B of the lower rail 70B is set to 1 mm).

The first outer leg 92B is attached to the vehicle rear end side of the vehicle width direction outer seat rail 16B (lower rail 70D) that supports the vehicle seat 12B. The first outer leg 92B has the same configuration as the first outer leg 92A, and similar components are given the same reference numerals with the letter B, and detailed description thereof will be omitted.

The second outer leg 94A has a flat mounting surface 106A that is mounted on the floor panel 74 inside the first outer leg 92A in the vehicle width direction, and support surfaces that extend upward from the vehicle width direction both ends of the mounting surface 106A. 108A and 110A. U-shaped cutouts 112A and 114A that open toward the vehicle upper side are formed on the vehicle upper side of the support surfaces 108A and 110A, respectively. The cutouts 112A and 114A form a connecting pipe accommodating portion 115A of the second outer leg 94A.

The second outer leg 94B is attached to the floor panel 74 inside the first outer leg 92B in the vehicle width direction. The second outer leg 94B has the same configuration as the second outer leg 94A, and the same constituent elements are given the same reference numerals with the letter B, and detailed description thereof will be omitted.

The inner leg 96 integrally supports the vehicle rear side of the seat rails 14A, 14B (the lower rails 70A, 70C) at the center in the vehicle width direction. The inner leg 96 includes a support surface 116 that supports the seat rails 14A and 14B (lower rails 70A and 70C) when viewed in the vehicle front-rear direction, vertical wall portions 118 that extend downward from the vehicle width direction end portions of the support surface 116, 120 and flange portions 122 and 124 extending outward in the vehicle width direction from the lower ends of the vertical wall portions 118 and 120 .

The inner leg 96 is attached to the floor panel 74 by fastening the flange portions 122 , 124 to the floor panel 74 . Lower surfaces 71A and 71C of the lower rails 70A and 70C are fastened to the support surface 116, respectively. In this manner, the inner leg 96 supports the seat rails 14A, 14B.

U-shaped cutouts 126, 128 are formed in the vertical wall portions 118, 120 of the inner leg 96, and the cutouts 126, 128 are formed in the support surface 116. An opening 130 having a width equivalent to . The cutouts 118 and 120 and the opening 130 constitute a connecting pipe accommodating portion 131 of the inner leg 96 .

The connecting pipe 98 has a length slightly longer than the length from the first outer leg 92A to the first outer leg 92B in the vehicle width direction.

Further, the diameter of the connecting pipe 98 is such that when it is inserted into the connecting pipe housing portions 100A, 100B of the first outer legs 92A, 92B and the connecting pipe housing portion 131 of the inner leg 96 and welded, the diameter of the lower rails 70B, 70D, 70A, A gap D (see FIG. 8) between the lower surfaces 71B, 71D, 71A, and 71C of 70C is formed to be as small as possible, for example, about 1 mm.

When the rear leg portion 22 is assembled to the vehicle seat device 10, the connecting pipe 98 is first connected from below the seat rail 16A at the right end in the seat width direction to below the seat rail 16B at the left end in the seat width direction. is placed.

In this state, the lower surfaces 71B, 71D of the seat rails 16A, 16B (lower rails 70B, 70D) on the outer side in the seat width direction are adjusted so that the connecting pipe 98 is accommodated in the connecting pipe accommodating portions 100A, 100B of the first outer legs 92A, 92B. , the first outer legs 92A and 92B are attached (fastened) from below. Similarly, the inner legs 96 are attached to the lower surfaces 71A, 71C of the seat rails 14A, 14B (lower rails 70A, 70C) on the inner side in the seat width direction so that the connecting pipes 98 are accommodated in the connecting pipe accommodating portions 131 of the inner legs 96. Attach (fasten) from In this state, the connecting pipe 98 is joined to the first outer legs 92A, 92B and the inner leg 96. As shown in FIG.

Subsequently, the second outer legs 94A, 94B are attached to the connecting pipe 98 from below so that the connecting pipe 98 is received in the connecting pipe receiving portions 115A, 115B of the second outer legs 94A, 94B at a predetermined position of the connecting pipe 98. Abut and bond.

The vehicle seat device 10 assembled in this manner is mounted on the vehicle by fastening the mounting surfaces 106A and 106B of the second outer legs 94A and 94B and the flange portions 122 and 124 of the inner leg 96 to the floor panel 74, respectively. It is installed in the interior of the vehicle (floor panel 74) facing forward.

A configuration including the seat frames 40A, 40B, the seat rails 14A, 16A, 14B, 16B, the front leg portion 18, and the rear leg portion 22 is sometimes referred to as a seat frame assembly 142.

(action)
A description will be given of the operation when the vehicle is side-collided from the right side in the vehicle width direction when the vehicle seat device 10 is applied as a rear seat.

1. Suppression of Inclination of Vehicle Seat in Side Collision When the vehicle is side-collided as described above, as shown in FIG. acts, and a moment M acts in a direction to incline the vehicle width direction right side of the vehicle seat device 10 (seat frame assembly 142) downward in the vehicle.

As a result, the vehicle width direction outer side (right side) of the vehicle seat 12A sinks downward in the vehicle. Here, the vehicle width direction outer seat rail 16A that supports the vehicle seat 12A (seat frame 40A) is supported by the second outer leg 94A via the first outer leg 92A and the connecting pipe 98 . A portion where the first outer leg 92A and the second outer leg 94A are connected via a connecting pipe 98 is called an "outer support portion 140A" (see FIGS. 5 and 6).

That is, in the outer support portion 140A, the first outer leg 92A fastened to the lower surface 71B of the lower rail 70B constituting the seat rail 16A and the second outer leg 94A fastened to the floor panel 74 are offset in the vehicle width direction. However, since the first outer leg 92A and the second outer leg 94A are connected by the connecting pipe 98 extending in the vehicle width direction, the rigidity is high. Therefore, deformation of the outer support portion 140A (the first outer leg 92A, the second outer leg 94A, and the connecting pipe 98) is prevented or suppressed when a load is input from the seat rail 16A, and the seat rail 16A, that is, the vehicle seat 12A, is prevented from deforming. Sinking displacement (inclination) of the (seat frame 40A) on the outside in the vehicle width direction is prevented or suppressed.

On the other hand, due to the action of the same moment M, an inertial force F acts on the vehicle seat 12B from the vehicle width direction outer side to the vehicle width direction inner side, and the vehicle width direction outer side (left side) of the vehicle seat 12B (seat frame 40B) is pushed. A moment acts in the direction of lifting the vehicle upward.

As a result, the vehicle width direction outer side (left side) of the vehicle seat 12B is lifted upward in the vehicle. Here, the vehicle width direction outer seat rail 16B that supports the vehicle seat 12B is supported by the second outer leg 94B via the first outer leg 92B and the connecting pipe 98 . A portion where the first outer leg 92B and the second outer leg 94B are connected via the connecting pipe 98 is called an "outer support portion 140B" (see FIGS. 5 and 6).

That is, in the outer support portion 140B, the first outer leg 92B fastened to the lower surface 71D of the lower rail 70D constituting the seat rail 16B and the second outer leg 94B fastened to the floor panel 74 are offset in the vehicle width direction. However, since the connecting pipe 98 extending in the vehicle width direction connects the first outer leg 92B and the second outer leg 94B, the rigidity is high. Therefore, the deformation of the first outer leg 92B, the second outer leg 94B, and the connecting pipe 98 is prevented or suppressed when a load is input from the seat rail 16B, and the seat rail 16B, that is, the vehicle seat 12B on the outside in the vehicle width direction. Lifting displacement (tilting) is prevented or suppressed. (Even if an upward load acts on the seat rail 16B (lower rail 70D), the lifting displacement is prevented or suppressed by the connecting pipe 98 joined to the first outer leg 92B attached to the lower surface 71D of the lower rail 70D.)

In addition, since the first outer legs 92A and 92B, the second outer legs 94A and 94B, and the inner leg 96 that constitute the rear leg portion 22 are connected by the connecting pipe 98, the vehicle seat device 10 has a high vehicle width direction rigidity. This further suppresses the sinking displacement of the vehicle seat 12A (seat frame 40A) and the lifting displacement of the vehicle seat 12B (seat frame 40B).

Further, like the vehicle seat device 10 (seat frame assembly 142), the seat rails 16A located on the vehicle width direction outer side are offset to the vehicle width direction inner side from the vehicle lower side of the seat cushion side frames 48B. In this case, the effect of suppressing the tilt of the vehicle seat device 10 (seat frame assembly 142) by the seat rails 16A is reduced compared to the case in which the seat rails 16A are not offset.

Even in this case, since the outer support portions 140A that support the seat rails 16A have a predetermined rigidity, the deformation of the outer support portions 140A is prevented or suppressed, and the sinking displacement of the seat rails 16A, that is, the inclination of the vehicle seat 12A. is prevented or suppressed. In other words, it is possible to compensate for a decrease in the effect of suppressing the inclination of the vehicle seat device 10 (seat frame assembly 142) due to the offset arrangement of the seat rails 16A.

Further, the connecting pipe 98, which is housed in and joined to the connecting pipe housing portion 100A opened upward of the vehicle of the first outer leg 92A attached to the lower surface 71B of the lower rail 70B constituting the seat rail 16A, is attached to the lower surface 71B of the lower rail 70B. 71B as close as possible. For example, the gap D (see FIG. 8) between the connecting pipe 98 and the lower surface 71B is 1 mm.

Therefore, when the seat rail 16A (lower rail 70B) sinks downward in the vehicle due to a side collision of the vehicle, the seat rail 16A immediately abuts on the connecting pipe 98, and the seat rail 16A via the connecting pipe 98 moves from the seat rail 16A to the second outer. A load is transmitted to the leg 94A, the inner leg 96, the second outer leg 94B, and the like. That is, the contact of the seat rail 16A with the connecting pipe 98 prevents the seat rail 16A, that is, the vehicle seat 12A (seat frame 40A) from sinking toward the outside in the vehicle width direction.

2. Ease of Assembly When the rear leg portion 22 is assembled to the vehicle seat device 10 (seat frame assembly 142), the rear leg portion 22 extends from below the seat rail 16A at the right end in the vehicle width direction to below the seat rail 16B at the left end in the vehicle width direction. A connecting pipe 98 is arranged in the vehicle width direction so that

In this state, by simply bringing the first outer legs 92A, 92B, the second outer legs 94A, 94B, and the inner leg 96 closer to the connecting pipe 98 from the lower side of the vehicle, the connecting pipe accommodating portion 100A, which is open to the upper side of the vehicle, The connecting pipe 98 can be accommodated in 100B, 115A, 115B, and 131, and the connecting pipe 98, the first outer legs 92A, 92B, the second outer legs 94A, 94B, and the inner leg 96 are joined to form the rear leg portion 22. Configurable.

In this manner, by simply bringing the first outer legs 92A, 92B, the second outer legs 94A, 94B, and the inner leg 96 close to the connecting pipe 98 from below the vehicle, the connecting pipe housing portions 100A, 100B, 100A, 100B, 100A, 100B, 100A, 100B, 100A, 100B, 100A, 100B, 100A, 100B, 100A, 100B, 100B, 100B, 100A, 100B, 100A, 100B, Since the connecting pipe 98 can be accommodated in 115A, 115B, and 131, the rear leg portion 22 can be easily assembled to the vehicle seat device 10 (seat frame assembly 142).

3. Suppression of cost increase due to increase in parts Since the inner leg 96 is integrated so as to support both of the seat rails 14A and 14B on the inner side in the vehicle width direction that respectively support the adjacent vehicle seats 12A and 12B, the rear leg portion 22 is By suppressing the number of parts, an increase in manufacturing cost of the vehicle seat device 10 can be suppressed.

4. Suppression of Displacement of Child Seat Even if the vehicle has a side collision with a child seat attached to the vehicle seat 12A, the connecting pipe 98 supports the vehicle rear side of the seat rail 16A (lower rail 70B) on the outside in the vehicle width direction. The portion 140A secures a predetermined rigidity. Therefore, the seat rail 16A sinks downward in the vehicle, that is, the vehicle seat 12A (seat frame 40A)
) is prevented or suppressed.

As a result, when a child seat is attached to the vehicle seat device 10 (vehicle seat 12A), the amount of displacement of the child seat can be further suppressed in the event of a side collision of the vehicle.

5. Response to floor panel shape Even if the shape of the floor panel 74 does not allow the outer legs attached to the floor panel 74 to be arranged directly under the seat rails 16A, 16B, the seat rails 16A, 16B can be adjusted as in the present embodiment. First outer legs 92A, 92B fastened to the lower surfaces 71B, 71D, and second outer legs 94A, 94B arranged inside the first outer legs 92A, 92B in the vehicle width direction and attached to the floor panel 74 are connected by pipes. By connecting them at 98, the outer support portions 140A and 140B can secure a predetermined rigidity, and can stably support the seat rails 16A and 16B on the outer side in the vehicle width direction.

(others)
In the present embodiment, the connecting pipe 98 of the vehicle seat device 10 (seat frame assembly 142) includes two pairs of seat rails 14A, 16A, 14B, 16B supporting adjacent vehicle seats 12A, 12B, that is, the first Although the outer legs 92A, 92B, the second outer legs 94A, 94B, and the inner leg 96 are connected, a pair of seat rails for supporting one vehicle seat, for example, the first outer leg 92A and the second outer leg 94A, is connected. , a connecting pipe that connects only the inner leg 96 may be used. Alternatively, the portions constituting the outer support portions 140A and 140B, that is, the connecting pipe extending from the first outer leg 92A to the second outer leg 94A and the connecting pipe extending from the first outer leg 92B to the second outer leg 94B. good.

In this embodiment, the vehicle seat device 10 (seat frame assembly 142) includes two vehicle seats 12A, 12B (seat frames 40A, 40B), two pairs of seat rails 14A, 16A, 14B, 16B and Although the configuration includes the front leg portion 18 and the rear leg portion 22, the configuration may include a single vehicle seat (seat frame), a pair of seat rails supporting the same, a front leg portion, and a rear leg portion.

Although the vehicle seat device 10 has been described as having vehicle seats 12A and 12B to which a child seat can be attached, it is not limited to this. That is, the vehicle seats 12A and 12B may be vehicle seats to which a child seat cannot be attached.

Moreover, although the case where the vehicle seats 12A and 12B of the vehicle seat device 10 (the seat frame assembly 142) are applied as rear seats has been described, the present invention is not limited to this. It may be applied to the front seats and other vehicle seats.

In this embodiment, the case where the vehicle is side-collided from the right side in the vehicle width direction has been described, but the vehicle seat device 10 (rear leg portion 22) is formed symmetrically in the vehicle width direction. Similarly to the form, the seat rail 16B that supports the vehicle width direction outer side (left side) of the vehicle seat 12B is supported by the outer support portion 140B (first outer leg 92A, second outer leg 94A, connecting pipe 98). Accordingly, the sinking (displacement) of the vehicle seat 12B is suppressed.

In this embodiment, both the seat rails 14A and 14B on the inner side in the vehicle width direction are integrally supported by the inner leg 86 on the front side of the vehicle and the inner leg 96 on the rear side of the vehicle, respectively. may be supported by separate inner legs on the front side of the vehicle and inner legs on the rear side of the vehicle.

Furthermore, in the present embodiment, the case where the vehicle seats 12A and 12B of the vehicle seat device 10 (seat frame assembly 142) are applied as rear seats has been described, but the present invention is not limited to this. It may be applied to the front seats and other vehicle seats.

10 Vehicle seat devices 12A, 12B Vehicle seats 14A, 16A, 14B, 16B Seat rail 36 Seat pad 38 Cover 48B Seatback side frames 62A, 62B Striker (mounting portion)
74 floor panel 92A first outer leg (first outer support portion)
92B first outer leg (another first outer support part)
94A second outer leg (second outer support)
94B second outer leg (other second outer support)
96 inner leg (inner support, other inner support)
98 connecting pipes 100A, 100B connecting pipe accommodating portions 115A, 115B connecting pipe accommodating portion 131 connecting pipe accommodating portion 142 seat frame assembly

Claims (8)

a seat frame constituting a vehicle seat;
a pair of seat rails that support the seat frame so as to be movable in the longitudinal direction of the vehicle and extend in the longitudinal direction of the vehicle on the inner side in the vehicle width direction and the outer side in the vehicle width direction, respectively;
an outer support portion for attaching the seat rail on the outer side in the vehicle width direction to the floor panel of the vehicle;
with
The outer support portion is
a first outer support portion attached to a lower surface of the vehicle rear side of the vehicle width direction outer seat rail;
a second outer support portion attached to the floor panel inside the first outer support portion in the vehicle width direction;
a connecting pipe extending in the vehicle width direction below the seat rail on the vehicle width direction outer side and connecting the first outer support portion and the second outer support portion;
A seat frame assembly comprising: further comprising an inner support portion that is attached to the floor panel and supports the vehicle rear side of the seat rail on the inner side in the vehicle width direction;
2. The seat frame assembly according to claim 1, wherein the connecting pipe connects the first outer supporting part, the second outer supporting part and the inner supporting part. The connecting pipe includes another inner support portion that supports another pair of seat rails that support another seat frame adjacent to the inner side of the seat frame in the vehicle width direction, another first outer support portion, and another second outer support portion. 3. The seat frame assembly of claim 2, which is also connected to the outer support. Each of the first outer support portion, the second outer support portion, and the inner support portion is formed with a connecting pipe accommodating portion that opens upwardly of the vehicle . The first outer support portion, the second outer support portion, and the inner support portion are connected by joining the first outer support portion, the second outer support portion, and the inner support portion. 4. The seat frame assembly according to 2 or 3. A seat frame assembly according to claim 3 or claim 4 depending on claim 3, wherein said inner support and said other inner support are integrated. The seat according to any one of claims 1 to 5, wherein the seat rails on the outer side in the seat width direction are arranged on the inner side in the vehicle width direction of the seat cushion side frames positioned on the outer side in the vehicle width direction in the seat frame. frame assembly. The seat frame assembly according to any one of claims 1 to 6, wherein the seat frame is provided with a mounting portion for mounting a connector of a child seat. a seat frame assembly according to any one of claims 1 to 7;
a seat pad attached to the seat frame constituting the seat frame assembly;
a skin covering the surface of the seat pad;
A vehicle seat device comprising: