JP7278020B2 - vehicle structure - Google Patents

Description

The present invention relates to a vehicle structure including a rear seat slide mechanism and a plurality of seat belt devices for restraining an occupant on the rear seat.

Patent Document 1 discloses a vehicle structure including a slide mechanism that supports a rear seat so as to be slidable in the longitudinal direction of the vehicle. The slide mechanism includes a slide rail that combines a lower rail fixed to the floor and an upper rail fixed to the rear seat. The slide mechanism further includes a reinforcing member that prevents separation of the upper rail from the lower rail. As shown in FIGS. 2 to 4 of Patent Document 1, the reinforcing member includes a lower J-hook attached to the lower rail and an upper J-hook attached to the upper rail. The upper side J hook and the lower side J hook are slidably engaged.

A plurality of seat belt devices are provided in the rear seat. As shown in Patent Document 2, in the rear seat, the buckles of two seat belt devices are arranged close to each other. Patent Document 2 discloses a structure in which two buckles are collectively provided on one mounting bracket and the mounting bracket is mounted on a vehicle body.

JP 2017-197080 A JP 2017-159713 A

In the configuration of Patent Document 2, the tensile loads of the two seat belts are concentrated on the mounting bracket during a vehicle collision. Therefore, it is preferable to reinforce the fixed portion of the vehicle body to which the mounting bracket is fixed. However, increasing the thickness of the portion to be fixed or reinforcing the portion to be fixed lowers the productivity of the vehicle, including the cost.

One of the objects of the present invention is to provide a vehicle structure capable of firmly fixing a plurality of buckles with a simple configuration.

A vehicle structure according to one aspect of the present invention includes:
a slide mechanism that slidably supports the rear seat with respect to the floor of the vehicle;
a plurality of seat belt devices for restraining an occupant on the rear seat;
The slide mechanism is
a slide rail combining a lower rail fixed to the floor and an upper rail fixed to the rear seat;
a reinforcing member for preventing separation of the upper rail from the lower rail;
The reinforcing member is
a lower side J hook attached to the lower rail;
A vehicle structure comprising an upper J hook attached to the upper rail and slidably engaged with the lower J hook,
The buckle of one seat belt device and the buckle of the other seat belt device, which are adjacent in the vehicle width direction, are fixed to the upper side J hook at positions spaced apart in the vehicle width direction.

In the vehicle structure described above, the upper side J-hook to which the plurality of buckles are fixed is very strong and hardly deforms. This is because the reinforcing member including the upper-side J-hook is primarily a member that prevents the upper rail from separating from the lower rail. By fixing the buckles to the strong and hard-to-deform upper-side J hook, the plurality of buckles are firmly fixed to the vehicle body without a separate reinforcing member or structure. In addition, since the upper side J hook is strong and resistant to deformation, even if a large tensile load acts on the buckle, the amount of displacement of the buckle during a vehicle collision can be minimized. As a result, movement of the occupant in the rear seat is suppressed, thereby reducing injury to the occupant.

Further, in the vehicle structure described above, the plurality of buckles are fixed to the upper side J hook at positions spaced apart in the vehicle width direction. Therefore, the tensile load applied to the buckle from the seat belt during a vehicle collision is distributed to the left and right of the slide rail. As a result, biased stress is less likely to act on the slide rail, thereby effectively suppressing separation of the upper rail from the lower rail.

FIG. 1 is a schematic perspective view showing a portion in the vicinity of a rear seat of a vehicle structure according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view of the vicinity of the slide mechanism of the rear seat shown in FIG. 1 taken along the line II-II.

A vehicle structure 1 according to an embodiment of the present invention will be described with reference to FIGS. The same reference numerals in the drawings indicate the same names. The arrows in the diagram indicate "FR" for the front of the vehicle, "RR" for the rear of the vehicle, "UP" for the top of the vehicle, "LWR" for the bottom of the vehicle, "LH" for the left of the vehicle, and "RH" for the right of the vehicle. show. The present invention is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope of equivalents of the scope of the claims.

<Embodiment 1>
≪Overall composition≫
A vehicle structure 1 shown in FIG. 1 includes a slide mechanism 4 (FIG. 2) that slidably supports a rear seat 3 with respect to a floor 2 of the vehicle. The vehicle structure 1 of this example further includes a plurality of seat belt devices 5 that restrain the occupants, and a tumble mechanism 6 that rotates the rear seat 3 toward the front side of the vehicle. One of the characteristics of the vehicle structure 1 is the mounting state of the seat belt buckles 5C and 5R provided in the seat belt device 5. As shown in FIG. Hereinafter, each configuration provided in the vehicle structure 1 of this example will be described in detail.

≪Rear seat≫
The rear seat 3 of this example is a 2:1 split folding bench seat, and includes a seat cushion 30 and a seat back 31 that can be folded toward the seat cushion 30 . The seat cushion 30 is a member that serves as a seat surface, and the seat back 31 is a member that serves as a backrest. The rear seat 3 of this example is provided on the tumble leg 60 of the tumble mechanism 6 via the slide mechanism 4 .

≪Tumble mechanism≫
The tumble mechanism 6 includes a tumble leg 60 and a support leg 61 that rotatably supports the front end of the tumble leg 60 . The support leg 61 holds the tumble leg 60 substantially horizontally. When the seat back 31 is tilted forward of the vehicle, the tumble leg 60 is unlocked by the support leg 61, and the tumble leg 60 is rotatable forward of the vehicle.

≪Seat belt system≫
The vehicle structure 1 of this example includes three seat belt devices 5 for the right seat, the left seat, and the center seat. In FIG. 1, only the buckles 5C, 5L, 5R of each seatbelt device 5 are illustrated.

Buckle 5C is a buckle of seat belt device 5 for the center seat. The seat belt device 5 for the central seat of this example is a three-point seat belt device in which a retractor for winding a seat belt (webbing) is built in the seat back 31 . Unlike this example, the retractor may be provided on the ceiling. In that case, two tongues are provided at the front end and intermediate portion of the seat belt, so that the rear seat 3 is provided with two buckles for the central seat. Alternatively, the seat belt device 5 for the central seat may be a two-point seat belt device.

A buckle 5L is a buckle of a seat belt device for the left seat, and a buckle 5R is a buckle of a seat belt device for the right seat. The buckle 5R is provided near the buckle 5C. Therefore, in the event of a vehicle collision, the tensile load of the seat belt concentrates on the locations where the buckles 5C and 5R are attached. Therefore, a structure for firmly fixing these buckles 5C and 5R is required. In this embodiment, by fixing the buckles 5C and 5R to the upper side J hook of the slide mechanism 4, the buckles 5C and 5R are firmly fixed. The slide mechanism 4 and the state of fixing the buckles 5C and 5R to the slide mechanism 4 will be described below.

≪Sliding mechanism≫
The slide mechanism 4 will be explained based on FIG. The slide mechanism 4 includes slide rails 40 and reinforcing members 41 . The slide rail 40 is formed by combining a lower rail 40L and an upper rail 40U.

The lower rail 40L of this example is fixed onto the tumble leg 60 of the tumble mechanism 6 with a bolt 4B. As already described, the tumble mechanism 6 is fixed to the floor 2, so the lower rail 40L of this example is fixed to the floor 2 (FIG. 1) via the tumble mechanism 6. As shown in FIG. Unlike this example, in the case of the vehicle structure 1 that does not include the tumble mechanism 6, the lower rail 40L is fixed to a seat base portion or the like that protrudes from the floor 2. As shown in FIG.

The lower rail 40L is a gutter-like member extending in the vehicle front-rear direction (the depth direction of the paper surface). A slit-shaped opening extending in the vehicle front-rear direction is provided on the upper surface of the lower rail 40L. An opening-side edge of the lower rail 40L extends downward in the vehicle. A space surrounded by the side wall, upper surface and edge of the lower rail 40L accommodates the tip of a bending leg of the upper rail 40U, which will be described later.

The upper rail 40U is fixed to the seat frame 32, which is the framework of the rear seat 3. As shown in FIG. In this example, an upper side J hook 8, which will be described later, is interposed between the upper rail 40U and the seat frame 32. As shown in FIG. The upper rail 40U includes a gutter-shaped portion having a slit-shaped opening that opens downward in the vehicle, and a bent leg extending outward in the vehicle width direction from the edge of the gutter-shaped portion. Therefore, the cross-sectional shape of the upper rail 40U is substantially π-shaped. The bent leg is shaped like a leaf spring, determines the position of the upper rail 40U within the lower rail 40L, and suppresses separation of the upper rail 40U from the lower rail 40L.

The reinforcing member 41 is a member that prevents the separation of the upper rail 40U from the lower rail 40L, and includes a lower J hook 7 and an upper J hook 8. As shown in FIG. The lower J hook 7 is a highly rigid member attached to the lower rail 40L via the tumble leg 60. As shown in FIG. Since the tumble leg 60 is fixed to the floor 2 ( FIG. 1 ), the lower J-hook 7 is fixed to the floor 2 via the tumble leg 60 . The upper J-hook 8 is a highly rigid member attached to the upper rail 40U and slidably engaged with the lower J-hook 7 .

The lower J-hook 7 includes a lower piece 70 , a side piece 71 and a J-shaped bending piece 72 . The lower piece 70 is a plate-like piece extending in the vehicle front-rear direction, and is fixed to the lower surface of the tumble leg 60 by arc welding or the like. The side piece 71 is a plate-like piece extending upward from the left end of the lower piece 70 (the right end on the paper surface) of the lower piece 70 . The length of the side piece 71 in the longitudinal direction of the vehicle is the same as that of the lower piece 70 . The J-shaped bent piece 72 is a plate-shaped piece that is connected to the upper end of the side piece 71 and extends downwardly after bending rightward of the vehicle (leftward on the paper surface). The length of the J-shaped bending piece 72 in the vehicle front-rear direction is the same as that of the side piece 71 .

The upper side J hook 8 includes an upper piece 80, a side piece 81, and a J-shaped bent piece 82. As shown in FIG. The upper piece 80 is a plate-like piece having a length across the slide rail 40 in the vehicle width direction, and is fixed to the lower surface of the seat frame 32 by arc welding or the like. The length of the upper piece 80 in the longitudinal direction of the vehicle is substantially the same as that of the lower piece 70 of the lower J hook 7 . Unlike this example, the length of the upper piece 80 may be shorter or longer than that of the lower piece 70 .

A side piece 81 of the upper side J hook 8 is a plate-like piece extending downward from the left end of the upper piece 80 . The length of the side piece 81 in the longitudinal direction of the vehicle is the same as that of the upper piece 80 . The J-shaped bending piece 82 is a plate-shaped piece that is connected to the lower end of the side piece 81, bends leftward of the vehicle (rightward on the paper surface), and then extends upwardly of the vehicle. The length of the J-shaped bent piece 82 in the vehicle front-rear direction is the same as that of the side piece 81 . The tip of the J-shaped bent piece 82 is inserted between the side piece 71 of the lower J-hook 7 and the J-shaped bent piece 72 . That is, the J-shaped bending piece 82 and the J-shaped bending piece 72 are engaged so as to mesh with each other, and the upper side J hook 8 and the lower side J hook 7 are configured to be slidable. Therefore, even if the upper rail 40U slides with respect to the lower rail 40L, the reinforcing member 41 does not hinder the sliding. On the other hand, the upward displacement of the upper rail 40U with respect to the vehicle is suppressed by the reinforcing member 41. As shown in FIG. This is because the J-shaped bent piece 82 fixed to the upper rail 40U is caught by the J-shaped bent piece 72 when the upper rail 40U is about to displace upward in the vehicle.

In this example, the buckle 5C of the seatbelt device 5 for the center seat and the buckle 5C of the seatbelt device 5 for the right seat are adjacent in the vehicle width direction to the upper J hook 8 of the reinforcing member 41 having the above configuration. 5R is fixed. The buckles 5C and 5R are individually fixed to the upper side J hook 8 at positions separated in the vehicle width direction.

The center seat buckle 5C is fixed to the upper piece 80 of the upper side J-hook 8 on the right side of the vehicle. That is, the buckle 5C is arranged on the side of the right seat cushion 30R in the vehicle width direction. In this example, the tether 50C of the buckle 5C is fixed to the upper piece 80 via the bracket 9. The bracket 9 is a plate-like piece made of a highly rigid material such as metal, and is fixed to the upper piece 80 by a fixing member 8C such as a bolt. By fixing the buckle 5C to the upper piece 80 via the bracket 9, the movement allowance of the buckle 5C is increased. Therefore, when the tongue 51C for the central seat is fitted into the buckle 5C, the buckle 5C is easy to use. Also, the buckle 5C for the central seat is intentionally arranged on the right side of the seat cushion 30R. Therefore, the corner of the center seat cushion 30C is less likely to get in the way when the buckle 5C is routed toward the center in the vehicle width direction (right side of the drawing), so the buckle 5C is easy to use.

The buckle 5R for the right seat is fixed to the side piece 81 of the upper side J hook 8. As shown in FIG. That is, the buckle 5R is arranged on the side of the central seat cushion 30C in the vehicle width direction. In this example, the tether 50R of the buckle 5R is fixed to the side piece 81 by a fixing member 8R such as a bolt. Unlike this example, the tether 50R may be fixed to the side piece 81 via a bracket. As shown in this example, intentionally arranging the right seat buckle 5R on the side of the central seat cushion 30C facilitates fitting the tongue 51R to the right seat buckle 5R. This is because the corner of the right seat cushion 30R is less likely to get in the way when the buckle 5R is routed to the right side in the vehicle width direction (the left side of the drawing).

On the other hand, the buckle 5L for the left seat in FIG. 1 may be fixed to the slide mechanism 4 provided on the tumble leg 60 indicated by, for example, the index line (the second from the right side of the page). More specifically, similarly to the configuration shown in FIG. 2, the buckle 5L can be fixed to the side piece 81 of the upper side J hook 8 in the reinforcement member 41 of the slide mechanism 4. As shown in FIG.

≪Effect≫
In the vehicle structure 1 of this example, the upper side J-hook 8 to which the plurality of buckles 5C and 5R are fixed is very strong and hardly deforms. This is because the reinforcing member 41 including the upper-side J hook 8 is primarily a member that prevents the separation of the upper rail 40U from the lower rail 40L. By fixing the buckles 5C and 5R to the strong and hard-to-deform upper J-hook 8, the buckles 5C and 5R are firmly fixed to the vehicle body without a separate reinforcing member or structure. Further, since the upper side J hook 8 is strong and hard to deform, even if a large tensile load acts on the buckles 5C, 5R, the amount of displacement of the buckles 5C, 5R at the time of a vehicle collision can be minimized. As a result, the occupant's movement in the rear seat 3 is suppressed, so the occupant's injury value is reduced.

Further, in the vehicle structure 1 of this example, the plurality of buckles 5C and 5R are fixed to the upper side J hook 8 at positions spaced apart in the vehicle width direction. Therefore, the tensile load input from the seat belt to the buckles 5C and 5R during a vehicle collision is distributed to the left and right of the slide rail 40. As shown in FIG. Therefore, biased stress is less likely to act on the slide rail 40, so separation of the upper rail 40U from the lower rail 40L is effectively suppressed.

<<Modification>>
As already described, when the retractor of the seat belt device 5 for the central seat is provided on the ceiling, two tongues are provided at the front end and intermediate portion of the seat belt, and the rear seat 3 is provided with two buckles 5C. In that case, the buckle 5C illustrated in FIG. 1 is fitted with a tongue provided at the tip (or intermediate portion) of the seat belt. On the other hand, the buckle (second buckle) in which the tongue provided at the intermediate portion (or tip) of the seat belt is fitted is provided close to the buckle 5L for the left seat. The second buckle and the left seat buckle 5L may be mounted in a state in which the structure shown in FIG. 2 is left-right symmetrical and the right seat member is replaced with the left seat member.

1 vehicle structure 2 floor 3 rear seat 30 seat cushion 31 seat back 32 seat frame 30C center seat cushion 30R right seat cushion 4 slide mechanism 4B bolt 40 slide rail 40L lower rail 40U upper rail 41 reinforcing member 5 seatbelt device 5C, 5L, 5R buckle, 50C, 50R tether, 51C, 51R tongue 6 tumble mechanism 60 tumble leg, 61 support leg 7 lower side J hook 70 lower piece, 71 side piece, 72 J-shaped bending piece 8 upper side J hook 8C, 8R Fixed member 80 upper piece, 81 side piece, 82 J-shaped bending piece 9 bracket

Claims (1)

a slide mechanism that slidably supports the rear seat with respect to the floor of the vehicle;
a plurality of seat belt devices for restraining an occupant on the rear seat;
The slide mechanism is
a slide rail combining a lower rail fixed to the floor and an upper rail fixed to the rear seat;
a reinforcing member for preventing separation of the upper rail from the lower rail;
The reinforcing member is
a lower side J hook attached to the lower rail;
A vehicle structure comprising an upper J hook attached to the upper rail and slidably engaged with the lower J hook,
A vehicle structure in which the buckle of one seat belt device and the buckle of the other seat belt device adjacent in the vehicle width direction are fixed at positions sandwiching the lower rail in the vehicle width direction of the upper side J hook.

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