JPH0623464Y2 - Seat slide device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a seat slide device that supports a seat so that it can move (slide) in the front-rear direction.

[Conventional technology]

For example, in a seat of an automobile or the like, a structure in which a seat slide device that can move (slide) in the front-rear direction is provided on both left and right sides of a lower surface of the seat is well known. The seat slide device includes, for example, a lower rail fixed to the vehicle floor, and an upper rail on which a seat is loaded and which is slidably incorporated into the lower rail via a steel ball (steel ball) or the like. .

In such a seat slide device, for example, a so-called integrated rail in which the upper rail is used as one member (side member) of the seat cushion frame is being promoted. In such an integrated rail, the upper rails of the left and right seat slide devices are connected to each other by, for example, pipe frames provided in the front and rear portions to form a seat cushion frame. Then, for example, a seat spring made of an S spring or the like is stretched between the left and right upper rails, a cushion body made of a urethane foam material or the like is placed on the seat spring, and the cushion body is made of a trim cover made of a skin or the like. A seat cushion is constructed by covering.

In such integrated rail, the upper rail is
Generally, it is also used as a fixing member for a belt anchor that connects and locks the ends of a seat belt. The belt anchor is usually fixed to the rear portion of the upper rail with a bolt or the like.

Further, the lower rail of the seat slide device is, for example,
It is supported and fixed on the vehicle floor by leg brackets that are fixed to the lower surfaces of the front and rear ends of the lower rail by welding or the like.

[Problems to be solved by the device]

As described above, in the known configuration, the seat slide device is supported and fixed on the vehicle floor by the leg brackets fixed to the front and rear ends of the lower surface of the lower rail. The upper rail in the integrated rail forms the side of the seat cushion frame and is also used as a fixing member for a belt anchor of a seat belt.

By the way, when the vehicle suddenly stops, at the time of a collision, etc., the inertial force that tries to cause the seated person to fly forward acts on the seated person, and the seat belt, due to the resistance force such as a belt anchor that resists the inertial force, Try to keep the seated person on the seat. Such inertial force acts on the belt anchor as a pulling force diagonally forward and upward, and pulls the rear portion of the lower rail forward diagonally upward together with the upper rail. That is, the lower rail is pulled in the direction of separation from the rear leg bracket. Therefore, when a large traction force acts on the rear portion of the lower rail via the belt anchor when the vehicle collides, the lower rail may be separated from the rear leg bracket.

Particularly, in the normal seating position, the position of the belt anchor is set apart from the front of the rear leg bracket. Therefore, a large traction force diagonally forward and upward acts on the rear portion of the lower rail as a larger traction force, and the lower rail is more likely to be separated from the rear leg bracket.

When a lateral acceleration (lateral acceleration) acts on the seat during traveling on a curve or the like, a lateral load acts on the lower rail via the upper rail. However, since the vertical wall (side wall) of the lower rail does not have any reinforcing member, the lower rail may be deformed and the upper end opening may be expanded with respect to a large lateral load. When the upper end opening of the lower rail is expanded, the steel rails are displaced from each other between the upper rail and the lower rail, and the upper rail cannot slide smoothly with respect to the lower rail.

Further, in the known configuration, the rear leg bracket is provided so as to project rearward of the seat slide device. Therefore, the rear leg bracket comes into contact with the foot of the seat occupant of the rear seat, which reduces the comfortability of the seat occupant of the rear seat.

It is an object of the present invention to provide a seat slide device that prevents the lower rail from being peeled off from the rear leg bracket and prevents the upper end opening of the lower rail from expanding, and improves the habitability of a rear seat occupant.

[Means for Solving the Problems]

To achieve this object, according to the present invention, a rear leg bracket includes a pair of folding side pieces bent upward so as to sandwich the bottom portion, and an outer bending portion at an upper end of the folding side piece. And a rear leg bracket is fixed to the rear side surface of the lower rail by welding the outer bent piece to the vertical wall of the lower rail. Further, a support plate is fixed to the vehicle floor by co-fastening one end to the bottom of the substantially U-shaped rear leg bracket, and the other end is fixed to the lower surface of the lower rail so that it is between the bottom of the rear leg bracket and the lower surface of the lower rail. It is installed.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a seat slide device 10 according to the present invention includes a lower rail 14 fixed to a vehicle floor 12,
A seat (not shown) is placed and an upper rail 16 slidably incorporated in the lower rail is provided. The seat slide device 10 is formed, for example, as a so-called integrated rail in which the upper rail 16 is a part (side) of the seat cushion frame 18.

The upper rail 16 of the seat slide device in such an integrated rail is formed of, for example, a pair of bending members, that is, a base piece 20 and a bending piece 22, as shown in FIG. Then, as will be described later, the upper end of the base piece 20 forms a part (side) of the seat cushion frame, and the lower end of the base piece is bent into a shape symmetrical with the bending piece 22. There is. The lower end (bent end) of the base piece 20 and the bent piece 22 are extended symmetrically downward and extend outward so that a steel ball 24 can be held between the lower rail 14 and the lower rail 14. 26, each formed.

On the other hand, the lower rail 14 is usually formed by bending a single steel plate or the like, and has a bent edge 28 capable of holding the steel ball 24.
While facing the curved edge 26 of the upper rail,
An inverted U-shaped bent edge 30 is formed at the upper end opening. The steel balls 24 are, for example, respectively arranged on the left and right sides, and support the vertical and horizontal loads between the lower rails 14 and the upper rails 16. The presence of such steel balls 24 ensures smooth sliding of the upper rail 16 with respect to the lower rail 14.

For example, as shown in FIG. 1, a pipe frame is provided between the front ends and the rear ends of the base pieces 20 of the left and right upper rails.
The seat cushion frame 18 is formed by connecting 32, 34 and the like.

Then, as shown in FIG. 1 and FIG. 2, for example, a nut 44 is screwed onto a bolt 42 inserted into an insertion hole 40 of the base piece 20 of the upper rail via an insertion hole 38 of the belt anchor 36. Thus, the belt anchor is attached to the base piece of the upper rail. Belt anchor 36 is typically attached to the rear of upper rail base 20.

As shown in FIG. 1, the lower rail of the seat slide device
14 is, for example, a front leg bracket 46 provided on each of the front and rear sides of the lower rail.
And a rear leg bracket 48, which are supported and fixed on the vehicle floor 12 by the pair of leg brackets. The front leg bracket 46 is, for example, bent in a substantially V shape, and has one end fixed to the lower surface of the front end of the lower rail 14 by welding or the like and the other end fixed to the vehicle floor 12 by a bolt (not shown) or the like. It

Here, in this invention, the rear leg bracket 48
As can be seen clearly from FIGS. 1 and 2, for example, the vertical wall 14a of the lower rail 14 is used to fix it to the outer side surface of the rear portion of the lower rail. Rear leg bracket
The 48 is formed, for example, with a pair of bent side pieces 52 bent upward so as to sandwich the bottom portion 50, and with an insertion hole 54 in the bottom portion. Further, the pair of bent side pieces 52 of the rear leg bracket has an outward bent piece 56 at the upper end, and one side surface 48a of the rear leg bracket is formed in a shape corresponding to the vertical wall 14a of the lower rail. . Such a rear leg bracket 48 may be, for example, an outward bending piece 56.
Is fixed to the side surface of the lower rail 14 by welding to the vertical wall 14a of the lower rail.

Further, as shown in FIG. 1, for example, a support plate 58 having a step is laid between the lower surface of the lower rail 14 and the bottom portion 50 of the rear bracket. Then, one end of the support plate 58 is connected to the through hole 60 of the support plate and the through hole 54 of the bottom portion of the rear leg bracket so that the bolt 62 is connected.
By tightening together with the rear leg bracket by
It is fixed at 12. Further, the other end of the support plate 58 is fixed to the lower surface of the lower rail by a rivet 68 or the like inserted through an insertion hole 66 of the support plate through an insertion hole 64 at the front end of the lower surface of the lower rail 14. In such a configuration, the lower rail 14 is supported and fixed by the support plate 58 not only on the side surface by the rear leg bracket 48 but also on the lower surface. Therefore, the lower rail 14 can be more firmly supported and fixed on the vehicle floor 12. The pair of bent side pieces 52 of the rear leg bracket serve as a vertical wall orthogonal to the vertical wall of the lower rail, effectively functioning against an upward tensile load, and more reliably preventing deformation of the lower rail 14. .

As described above, according to the present invention, the rear leg bracket 48 of the lower rail 14 is fixed to the rear side surface of the lower rail using the vertical wall 14a. That is, in the normal seating position of the seat, the belt anchor 36 is
Since it is located at the rear of 14, the belt anchor and the rear leg bracket 48 are set within a range close to the vertical line.

Therefore, the belt anchor 36 and the rear leg bracket 48
The distance between them becomes short, the traction force acting on the belt anchor easily escapes from the rear leg bracket to the vehicle floor 12, and the resistance force between the rear leg bracket and the lower rail 14 against the traction force becomes large. Therefore, due to the forward inertial force when the vehicle is suddenly stopped or in a collision,
Even if the belt anchor 36 is pulled forward and obliquely upward, it can withstand sufficiently under a large resistance force, and the lower rail 14 can be sufficiently prevented from peeling off from the rear leg bracket 48.

Then, attach the rear leg bracket 48 to the side of the lower rail 14.
Since the is fixed, the vertical wall 14a of the lower rail can be reinforced. Therefore, the vertical wall 14a of the lower rail is supported with sufficient resistance against lateral acceleration even when traveling on a curve, and the upper opening of the lower rail 14 is widened, that is, deformation of the lower rail is sufficiently prevented. To be done. Therefore, between the lower rail 14 and the upper rail 16, the steel balls 24
However, since it is held in a stable state without shifting, the smooth sliding of the upper rail with respect to the lower rail is
Can always be secured.

Furthermore, since the rear leg bracket 48 does not project to the rear of the lower rail 14, it is possible to prevent contact with the foot of the rear seat occupant, and to sufficiently secure good habitability for the rear seat occupant.

Further, for example, if the support plate 58 is installed and fixed between the lower surface of the lower rail 14 and the bottom portion 50 of the rear leg bracket, in addition to fixing the lower rail on the side surface,
Also on the lower surface, the lower rail is supported and fixed by the support plate. That is, the rear leg bracket
The support plate 58 mainly bears the load in the horizontal direction acting on the lower rail 14 by the support 48, and the lower rail is reliably supported and fixed by the support plate 58 mainly carrying the load in the vertical direction. Therefore, the lower rail 14 can be firmly supported and fixed in a more stable state.

Note that reference numeral 70 in FIG. 2 indicates a locking piece to which a terminal of a seat spring (not shown) made of an S spring or the like is locked. Further, reference numeral 72 in FIG. 1 is a locking piece for locking a terminal of a trim cover (not shown) forming a seat by covering a cushion body (not shown) mounted on the seat spring. is there.

In the embodiment, the upper rail 16 is embodied as an integrated rail forming part of the seat cushion frame 18. However, the present invention is not limited to this, and the upper rail 16 can be similarly configured as a seat slide device that is formed separately from the seat cushion frame 18.

Further, in the embodiment, the seat slide device 10 is embodied as a configuration in which the upper rail 16 is slidably incorporated in the lower rail 14, but the embodiment is not limited to this, and conversely, the lower rail is provided on the upper rail. The configuration may be incorporated.

If the rear leg bracket 48 is fixed to the outer side surface of the lower rail 14 as in the embodiment, the rear leg bracket can be attached to the vehicle floor 12, that is, the lower rail can be easily attached. However, the configuration is not limited to this, and the rear leg bracket 48 may be fixed to the inner side surface of the lower rail 14. In such a configuration,
Since the rear leg bracket 48 is not recognized in appearance, the appearance quality of the seat can be improved.

Here, since the belt anchor 36 is usually fixed to the outer side surface of the upper rail 16, if the rear leg bracket 48 is fixed to the outer side surface of the lower rail 14, the distance between the rear leg bracket and the belt anchor is reduced. However, it can be set to a short distance on the same side of the upper rail and lower rail. Therefore, the upper rail 16, the lower rail 14, etc. are not twisted by the traction force from the belt anchor 36, and the traction force directly acts on the rear leg bracket and is released to the vehicle floor 12. Therefore, the lower rail 14 and the rear leg bracket against the pulling force from the belt anchor 36
A sufficient resistance force between 48 is obtained, and the lower rail is more firmly supported and fixed.

Further, in the embodiment, only the rear leg bracket 48 is fixed to the side surface of the lower rail 14. However, the invention is not limited to this, and the front leg bracket 46 may be fixed to the side surface of the lower rail 14 together with the rear leg bracket 48. In this case, the front leg bracket 46 is preferably fixed to the vertical wall 14a on the side facing the rear leg bracket 48.

Further, one end of the support plate 58 is placed on the upper surface of the bottom portion 50 of the rear leg bracket, and is fixed to the vehicle floor 12 by being tightened together with the bottom portion of the rear bracket by a bolt 62. However, the present invention is not limited to this, and for example, one end of the support plate 58 may be connected to the rear leg bracket bottom 50 and the vehicle floor.
By interposing with 12 and tightening together with bolt 62,
It may be fixed to the vehicle floor 12. Further, the support plate 58 may be formed integrally with the rear leg bracket 48.

It should be noted that although the embodiment is embodied as a seat slide device of an automobile or the like, the present invention is not limited to this, and the configuration is also applied to a seat slide device attached to a seat of a train, an airplane, a ship, or the like. it can.

The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention in any way, and all modifications and alterations within the technical scope of the present invention are also included in the present invention. Needless to say.

[Effect of device]

As described above, according to the seat slide device of the present invention, the rear leg bracket of the lower rail is fixed to the rear side surface of the lower rail by utilizing the vertical wall of the lower rail. That is, in the normal seating position of the seat, the belt anchor is located at the rear portion of the lower rail, so that the belt anchor and the rear leg bracket are set within a range close to the vertical line.

Therefore, the distance between the belt anchor and the rear leg bracket is shortened, and the traction force acting on the belt anchor is
This makes it easier to escape from the rear leg bracket to the vehicle floor, and increases the resistance between the rear leg bracket and the lower rail against traction. Therefore, when the car suddenly stops,
Even if the belt anchor is pulled diagonally forward and upward by the inertial force to the front at the time of a collision, the belt anchor can withstand a large amount of resistance and the lower rail is sufficiently prevented from peeling off from the rear leg bracket. it can.

Since the rear leg bracket is fixed to the side surface of the lower rail, the vertical wall of the lower rail can be reinforced. Therefore, the vertical wall of the lower rail is supported with sufficient resistance against lateral acceleration even when traveling on a curve, and the upper end opening of the lower rail is widened, that is, deformation of the lower rail is sufficiently prevented. . Therefore, the steel balls are held between the lower rails and the upper rails in a stable state without slipping, so that smooth sliding of the upper rails with respect to the lower rails can always be ensured.

Further, since the rear leg bracket does not project to the rear of the lower rail, it is possible to prevent contact with the foot of the rear seat occupant, and to sufficiently secure good habitability of the rear seat occupant.

Further, since the support plate is installed and fixed between the lower surface of the lower rail and the bottom portion of the rear leg bracket, the lower rail is supported and fixed by the support plate also on the lower surface in addition to fixing the lower rail on the side surface. That is, the lower rails are supported and fixed by the support plate mainly bearing the vertical load acting on the lower rails by the rear leg brackets. Therefore, the lower rail can be firmly supported and fixed in a more stable state.

Furthermore, since the rear leg bracket is fixed to the outer side surface of the lower rail, the distance between the rear leg bracket and the belt anchor can be set to a short distance on the same side of the upper rail and the lower rail, and the traction force from the belt anchor can be increased. However, it directly acts on the rear leg bracket and is released to the car floor. Therefore, sufficient resistance to the traction force from the belt anchor is obtained, and the lower rail can be more firmly supported and fixed.

Since the rear leg bracket is fixed to the side surface outside the rear portion of the lower rail, the work of attaching the rear leg bracket to the vehicle floor can be easily performed. In particular, since one end of the support plate is fixed to the vehicle floor by being fastened together with the bottom of the rear leg bracket, the rear leg bracket and the support plate can be attached to the vehicle floor at once.

[Brief description of drawings]

1 is a schematic perspective view of a seat slide device according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. 10 seat slide device, 12: car floor, 14: lower rail, 14
a: Vertical wall of lower rail, 16: Upper rail, 18: Seat cushion frame, 36: Belt anchor, 46: Front leg bracket, 48: Rear leg bracket, 5
0: bottom, 52: bent side piece, 58: support plate.

Claims (1)

[Scope of utility model registration request] 1. A seat slide device including a lower rail whose front and rear ends are fixed to a vehicle floor by a pair of front and rear leg brackets, and an upper rail in which a seat is loaded and which is incorporated in the lower rail so as to be slidable in the front-rear direction. In the above, the rear leg bracket is formed into a substantially U shape having a bottom portion and a pair of folding side pieces bent upward so as to sandwich the bottom portion, and an outer bending piece at the upper end of the folding side piece. , The outer bent piece is welded to the vertical wall of the lower rail, the rear leg bracket is fixed to the rear side surface of the lower rail, and the support plate is fastened together with the bottom of the rear leg bracket having a substantially U shape at one end. The lower rail is fixed to the vehicle floor with the other end fixed to the lower surface of the lower rail and installed between the bottom of the rear leg bracket and the lower surface of the lower rail. Rear portion, the side surface, supported by the lower surface of both seat slide apparatus characterized by being fixed.