JP2505256Y2 - Sheet slide device and reinforcing plate - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a seat slide device that supports a seat so as to be slidable in the front-back direction.

[Conventional technology]

For example, a seat of an automobile or the like is supported by a seat slide device so as to be slidable in the front-rear direction.
The seat slide device is fixed to the lower rail on the vehicle floor (vehicle body floor surface) and the seat below the side surface of the seat,
An upper rail slidably assembled to the lower rail via a rolling element is provided. Leg brackets are riveted to the front and rear ends of the lower rail,
The lower rails are fixed to the vehicle floor by bolting the leg brackets to the vehicle floor. Such seat slide devices are provided on the left and right sides of the seat, respectively.

For example, a steel ball (steel ball) is used as the rolling element, and two steel balls are arranged in the left and right seat slide devices so as to be separated from each other in the front and rear at a gap on the side of the lower rail and the upper rail. . A total of four (protruding) embosses, one at the front and rear ends and two at the center, are formed on the upper rail and the lower rail, respectively, and steel balls are housed between the front and rear ends and the central protruding embossments.

In this configuration, the embossing functions as a stopper, the front steel ball rolls between the front end and the center front embossing of the upper rail, and the rear steel ball rolls between the center rear and the rear end of the upper rail. for that reason,
The rolling range of the front and rear steel balls is limited to the front half and the rear half, so that local deviation of the steel balls is prevented, and smooth sliding of the upper rail is ensured.

[Problems to be solved by the device]

In the known seat slide device, when the upper rail is slid forward, the front steel ball collides with the embossment at the front end of the lower rail, the embossment at the center front of the upper rail, and the rear steel ball moves toward the lower rail. The front end position of the upper rail is defined by colliding with the emboss on the rear of the center and the emboss on the rear end of the upper rail.

Therefore, if the upper rails are vigorously slid to the front limit position, the steel balls may hit the embosses, and the embosses may be damaged or deformed. As the emboss is damaged or deformed, the upper rail and the lower rail are also deformed, which makes it difficult to smoothly slide the upper rail and impairs the strength of the seat slide device.

In a vehicle seat, when a seated person wears a seat belt, a large load (tensile force) is transmitted to the upper rail via the seat belt during acceleration / deceleration, and tries to lift while deforming the upper rail. In a known seat slide device, a reinforcing plate is fixed to the inner surface of the upper rail to increase the rigidity of the upper rail and prevent the upper rail from being deformed.

However, this reinforcing plate does not function effectively against deformation caused by the impact of the steel ball on the embossing. And if the upper rail is deformed even a little due to the damage and deformation of the emboss due to the collision of the steel balls, when the load from the seat belt is transmitted,
The deformation of the upper rail may spread, and the rigidity of the upper rail may suddenly decrease. In particular, since the load from the seat belt tries to pull up the rear end of the upper rail, if the rear end of the upper rail is deformed, the seat slide device may have insufficient strength against the load.

Recently, a walk-in seat that automatically slides the upper rail to the front end position in conjunction with the frontward movement of the seat back has been adopted as a vehicle seat.
According to the walk-in seat, just by moving the seat back forward, a sufficient space for getting on and off can be secured quickly,
Good boarding / alighting properties can be obtained. However, the lock of the upper rail is released in conjunction with the forward movement of the seat back, and by the return spring between the upper rail and the lower rail,
The upper rail accelerates, slides, and is suddenly stopped at the end position. Then, when the upper rail suddenly stops at the front end position, the steel ball collides with the emboss which is the stopper, and the emboss is easily damaged and deformed.

In the known seat slide device, such a damage or deformation of the emboss is dealt with by, for example, increasing the thickness of the upper rail or the lower rail as a whole or changing the material. This is not enough because it causes the weight and cost of the device to increase.

An object of the present invention is to provide a seat slide device in which breakage and deformation of an emboss are suppressed without inviting weight and cost increase.

Another object of the present invention is to provide a reinforcing plate that suppresses breakage and deformation of the emboss without causing the weight and cost of the seat slide device to increase.

[Means for solving the problem]

In this invention, it is noted that the deformation at the rear end of the upper rail greatly affects the decrease in the rigidity of the upper rail, and the reinforcing plate on the inner surface of the upper rail prevents the deformation at the rear end of the upper rail. That is, a vertical wall, which can be located adjacent to the embossing at the rear end of the upper rail and located behind the upper rail with respect to the steel ball, is provided on the reinforcing plate by bending the rear end downward, and the vertical wall of the reinforcing plate is provided. The wall is configured to prevent deformation of the embossing and the upper rail.

〔Example〕

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

As shown in FIGS. 1 and 2, the seat slide device 10
Is a lower rail 12 fixed to a floor surface 11 such as a car floor,
It has an upper rail 14 fixed to the seat below the side of the seat (not shown), and four steel balls 18 as rolling elements, two left and right, and two front and back, respectively. It is arranged in the gap between the lower rail and the upper rail.

Leg brackets 19 are riveted to the front and rear ends of the lower rail 12, and the lower brackets are bolted to the vehicle floor 11 so that the lower rails are fixed to the vehicle floor. The rear leg bracket 19 is fixed to the lower rail 12 from the side so as to counter the load transmitted from the seat belt (not shown) to the upper rail 14.

In the embodiment, the lower rail 12 is configured to embrace the upper rail 14, one at the front end and one at the rear end, and two at the center.
A total of 4 (protruding) embossed 20 (20-1 to 20-
4) is formed on the side walls of the lower rail 12 and the upper rail 14, respectively. And as can be seen from FIG. 3 (A), the front steel ball 18 is located between the front end and the center front embossed portions 20-1 and 20-2, and the rear steel ball is
The embosses 20-3 and 20-4 at the center rear and the rear end are respectively arranged so that they can roll between the corresponding embosses.

Note that, contrary to the embodiment, the upper rail 14 may be configured to hold the lower rail 12.

As shown in FIGS. 1 and 2, the reinforcing plate 22 is fixed to the inner surface of the upper rail 14 by rivets or the like, and the reinforcing plate 22 has a series of claws 23 extending from the square holes 24 of the upper rail. Has been formed. The rigidity of the upper rail against the load transmitted from the seat belt to the upper rail 14 is enhanced by the presence of the reinforcing plate 22. Further, even if the upper rail 14 is deformed and lifted by the load from the seat belt, the claws 23 of the reinforcing plate are immediately locked in the appropriate square holes 26 of the lower rail, and the upper rail 14 is further deformed. Is hindered.

As can be seen from FIGS. 1, 3 (A) and 4, the rear end of the reinforcing plate is bent downward at a position adjacent to the embossment 20-4 at the rear end of the upper rail 14 with respect to the steel ball 18. Forming a vertical wall 28. The vertical wall 28 is formed in the vicinity of the embossment 20-4 at the rear end so as to be located immediately behind the upper rail 14 with close contact or with a slight gap left on the upper rail.

In the seat slide device 10 having the above configuration, when the upper rail 14 slides forward to reach the front limit position, the third
As shown in FIG. (B), the front steel ball 18 collides with the front end embossing 20-1 of the lower rail 12 and the center front embossing 20-2 of the upper rail 14, and the rear steel ball 18 is the lower rail. Embossed 20-3 at the center rear of
Collision between the embossed 20-4 at the rear end of the upper rail.
Therefore, the colliding embosses of the steel ball 18 may be damaged or deformed.

However, the vertical wall 28 of the reinforcing plate is
Since it is located between the rear of the upper rail with respect to the steel ball 18 near the embossing 20-4 at the rear end, that is, inside the upper rail in the position aligned with the left and right steel balls, it is blocked by the vertical wall behind the upper rail. The deformation of the embossing 20-4 is prevented, and the deformation of the upper rail near the embossing 20-4 is prevented. In particular, embossed 20
The impact of the steel ball 18 on -4 tends to push the upper rail 14 in the rearward direction with respect to the steel ball in the vicinity of the emboss 20-4, as shown by the arrow in FIG. However, since the vertical wall 28 having a sufficient length in the vertical direction is located immediately behind the upper rail 14 with respect to the steel ball 18, it has sufficient resistance against deformation of the upper rail and the upper rail 14 Does not cause deformation. In addition, as can be easily understood from FIG. 4, the pushing force that pushes the upper rail 14 toward the steel ball 18 in the backward direction is transmitted to the vertical wall 28 from the left and right, and cancels each other out. Even from the point, the upper rail is not easily deformed.

As described above, by arranging the rear end of the reinforcing plate as the vertical wall 28 between the rear of the upper rail 14 with respect to the steel ball 18, the embossment 20 of the rear end of the upper rail is obtained.
-4 Deformation of the upper rail in the vicinity thereof is prevented. Therefore, at the time of acceleration / deceleration, the upper rail is sufficiently resistant to the load transmitted from the seat belt to the upper rail 14 without being deformed and pulled up, which gives the seat slide device 10 a strong anxiety. Never.

The reinforcing plate 22 can be formed only by slightly extending the rear end of the existing reinforcing plate and bending it and adding the vertical wall 28, and does not increase the number of parts. In addition, the reinforcing plate 22 can be molded at low cost, and the incorporation into the upper rail 14 does not become complicated or complicated.

As described above, according to the present invention, even with a slight modification, a great effect can be obtained in preventing deformation, and the seat slide device 10 has sufficient strength without increasing weight and cost. Can be secured.

The edge of the slit may be crimped, and the rolling range of the steel ball 18 may be defined by this crimping piece, and the embossing also includes such crimping piece.

Although the seat slide device 10 of the present invention is most suitable for a walk-in seat, it may be mounted on another seat. Further, the seat slide device 10 of the present invention may be mounted not only on the seat of the automobile but also on other seats, for example, seats of airplanes, ships and the like.

If the seat slide device 10 of the present invention is configured as an integrated rail that uses the upper rail 14 as a part (side member) of the seat cushion frame, an independent seat cushion frame is not required, and the seat can be made smaller and lighter.

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

[Effect of device]

As described above, since the vertical wall of the reinforcing plate is located behind the upper rail with respect to the steel ball near the emboss at the rear end of the upper rail, the vertical wall behind prevents the emboss from deforming and near the emboss. Deformation of the upper rail is prevented. So, for example,
When mounted on a vehicle seat, the upper rail sufficiently withstands the load transmitted from the seat belt to the upper rail during acceleration / deceleration, and does not give the seat slide device a strong anxiety.

In particular, since the vertical wall has a sufficient length in the vertical direction, it has a sufficient resistance against the pushing force that pushes the upper rail backward with respect to the steel ball, and does not deform the upper rail.

The reinforcing plate need only extend the rear end of the existing reinforcing plate a little and bend it to add a vertical wall, which does not increase the number of parts. In addition, the reinforcing plate can be formed at low cost, and the incorporation into the upper rail does not become complicated or complicated.

And, with the reinforcing plate with a slight twist,
The deformation of the upper rail is suppressed, and sufficient strength is guaranteed for the seat slide device without causing weight increase and price increase.

[Brief description of drawings]

1 is an exploded perspective view of the seat slide device of the present invention, FIG. 2 is a cross-sectional view of the seat slide device taken along line II-II in FIG. 3 (A), FIG. 3 (A), (B) shows the normal position and the front limit position of the seat slide device taken along the line III-III in FIG.
FIG. 4 is a schematic vertical sectional view, and FIG. 4 is a horizontal sectional view of the seat slide device taken along line IV-IV in FIG. 3 (B). 10: Seat slide device, 11: Car floor, 12: Lower rail, 14:
Upper rail, 18: Steel ball, 19: Leg bracket, 20 (20-1 to 20-4): Emboss, 22: Reinforcement plate, 23: Reinforcement plate claw, 24: Square hole, 28: Reinforcement plate vertical wall .

Claims (2)

(57) [Scope of utility model registration request] 1. A lower rail fixed to a floor surface, and an upper rail on which a seat is loaded and slidably incorporated in the lower rail. The rolling range of a steel ball provided between the lower rail and the upper rail is lower rail. In a seat slide device where the reinforcing plate is fixed to the inner surface of the upper rail and is limited by the emboss formed on the upper rail, the vertical wall that resists the deformation of the upper rail near the emboss at the rear end is A seat slide device characterized in that it is provided on a reinforcing plate by bending the rear end downward so that it can be located behind the upper rail relative to the steel ball at a position adjacent to the emboss. 2. A reinforcing plate fixed to an inner surface of an upper rail of a seat slide device, wherein a rear end is bent to form a vertical wall against deformation of the upper rail in the vicinity of an emboss. Reinforcement plate for seat slide device.