JP3399634B2 - Seat rail device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat rail device for adjusting the longitudinal position of a vehicle seat.

[0002]

2. Description of the Related Art As a seat rail device capable of moving a bench seat or the like back and forth, one having a high lock strength is used to withstand a high load at the time of a vehicle collision. That is, in the seat rail device for the separate seat,
Although it is set to withstand a load of about 1t applied at the time of a collision at 50 km / h, a seat rail device for bench seats is used when a collision at the 50 km / h occurs when two or three people are seated. It is set to withstand such a load of about 3 tons.

A conventional seat rail device for a bench seat will be described with reference to FIG. The seat rail device includes a lower rail 12 mounted on the floor side of a vehicle body, an upper rail 14 slidably supported on the lower rail 12, and a lock bar 16 slidably mounted on the upper rail 14. A lock bar holding member 18 for holding and fixing a seat (not shown), and a side wall 20b attached to the lower rail 12 and having a plurality of lock holes 20a through which the lock bar 16 is inserted in the vehicle traveling direction. And a lock member 20 having In this conventional seat rail device, in order to prevent the upper rail 14 from being separated from the lower rail 12 in the event of a vehicle collision, a patch plate 22 that penetrates the lock bar 16 is attached to the side wall 18b of the lock bar holding member 18 by welding. It was

[0004]

However, in the conventional seat rail device, since the distance between the patch plate 22 and the side wall 20b of the lock member 20 is large, the load applied to the lock bar 16 in the event of a vehicle collision. However, since a torsional load is applied between the lock bar 16, the patch plate 22, and the side wall 20b of the lock member 20, it is difficult to obtain high lock strength, and in order to obtain the required lock strength. It was necessary to use thick steel plates.

The lock bar holding member 18 is welded to the upper rail 14 at the lower end of the side wall 18b thereof. Therefore, the lock bar holding member 18 has the highest strength at the welded portion. However, since the patch plate 22 for receiving the load at the time of a vehicle collision is attached above the welded portion, this welded portion having the highest strength has not been used for increasing the lock strength.

Further, since the patch plate 22 is attached to the lock bar holding member 18 by welding, the welding work is troublesome and the manufacturing cost of the seat rail device is increased.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a seat rail device having a high lock strength.

[0008]

To achieve the above object, a seat rail device of the present invention comprises an upper rail and an upper rail;
A lower rail; and a pair of side walls having through holes for holding the lock bar slidably substantially at right angles to the traveling direction of the vehicle, and joined to the upper rail at substantially lower ends of the side walls A lock bar holding member, a plurality of through holes for inserting the lock bar, and a side wall arranged along one side wall of the lock bar holding member, the lock member being attached to the lower rail; A seat rail device having a plurality of boss portions projecting toward the side wall side of the lock member is formed at substantially the lower end of the side wall of the lock bar holding member located on the side wall side of the lock member, A lock reinforcing member having a through hole through which a lock bar is inserted, corresponding to the through hole of the lock member,
The substantially lower ends Ri consists lock reinforcement member fixed to the boss portion by fixing means, the locking reinforcing member of the pair
It consists of a crank-shaped steel plate with a deflection piece,
So that the upper deflection piece is displaced toward the side wall of the lock member
Place the lower deflection piece on the boss of the lock bar holding member.
The rivet as the fixing means by arranging it so as to be displaced toward
It is characterized by being fixed by the

[0009]

[0010]

In the seat rail device configured as described above, the lock reinforcing member is fixed to the boss portion that is formed substantially at the lower end of the side wall of the lock bar holding member and projects toward the side wall side of the lock member. Therefore, the lock reinforcing member is
It is arranged close to the lock member side by the protruding height of the boss portion. Therefore, the load at the time of a vehicle collision is applied as a shear load between the lock bar, the through hole of the lock reinforcing member, and the through hole of the lock member, so that these members can maintain high lock strength. Further, the lock bar holding member is joined to the upper rail at substantially the lower end of the side wall thereof,
A boss portion is formed at the joined lower end, and the lower end of the lock reinforcing member is fixed to the boss portion by a fixing means. The substantially lower end of the lock bar holding member has a very high strength because it is joined to the upper rail and the boss portion is formed. Since the lock reinforcing member is fixed to substantially the lower end of the lock bar holding member having high strength, the lock bar holding member is unlikely to be deformed by the load applied to the lock reinforcing member during a vehicle collision. Therefore, the seat rail device of the present invention can maintain high lock strength.

Further, in a preferred aspect of the present invention, since the lock reinforcing member is fixed to the lock bar holding member by rivets, the lock reinforcing member can be fixed at a low cost and a load is applied when the vehicle collides. However, the lock reinforcing member does not come off easily.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a perspective view of a seat rail device according to an embodiment of the present invention, FIG. 2 is a plan view of the seat rail device of FIG. 1, and FIG. 3 is a sectional view taken along line GG of FIG. As shown in FIG. 3, the seat rail device 10 of the present embodiment includes a lower rail 12, an upper rail 14 slidably supported on the lower rail 12, a lock bar 16 attached to the upper rail 14, and a lock bar 16. A lock bar holding member 18 for slidably holding and fixing a seat (not shown) and a plurality of lock holes 20a attached to the lower rail 12 and through which the lock bar 16 is inserted are formed in the vehicle traveling direction. It is mainly composed of a lock member 20 having a side wall 20b formed therein and a separation preventing member 24 for preventing separation of the upper rail 14. The seat rail device 10 is fixed to a turntable (not shown) attached to the floor of the vehicle body by a bolt 26 that passes through the bottom of the lower rail 12.

The seat of this embodiment is formed by attaching a folding type auxiliary seat to a bench seat that can accommodate two passengers, and is configured so that three seats can be seated when the auxiliary seat is unfolded. . The seat rail device 10 shown in FIG. 3 can be adjusted in the front-rear direction, and is configured as a so-called rotary seating type that can be directed in the vehicle traveling direction and the opposite direction by the rotating disk.

FIG. 3 shows a locked state of the seat rail device 10. At the time of front-rear adjustment, the lock bar 16 is horizontally moved to the left in the drawing to lock the lock hole 20a of the lock member 20 attached to the lower rail 12 side.
Then, the upper rail 14 can be moved. The configurations of the upper rail 14 and the lower rail 12 will be described in more detail with reference to FIG. The lower rail 12 has a substantially U-shaped cross section, and the bottom wall 12a is provided with a through hole 12d for inserting the bolt 26 for attachment to the rotating disk described above. A horizontal piece 12c that points outward is formed.

On the other hand, the upper rail 14 having a C-shaped cross section has a top wall 14a, a side wall 14b, and a horizontal piece 14c directed inward. Between the side wall 12b and the horizontal piece 12c of the lower rail 12 and the side wall 14b and the horizontal piece 14c of the upper rail 14, the ball 2
8 is arranged, and by disposing the roller 30 between the lower rail 12 and the upper rail 14,
The upper rail 14 is slidably supported on the lower rail 12.

As shown in FIG. 4, the lock bar holding member 18 having a substantially U-shaped cross section has a top wall 18a and a side wall 1.
8b, a horizontal piece 18c directed to the lock member 20 side shown in FIG. 3, and a U-shaped piece 18d set on the peeling prevention member 24 side shown in FIG. The lower end of the side wall 18b of the lock bar holding member 18 is fixed to the upper rail 14 by being welded to the side wall 14b of the upper rail 14. A pair of through holes 18e for inserting the lock bar 16 are formed at a substantially central position of the side wall 14b. Further, a boss portion 18f that projects toward the side wall 20b side of the lock member 20 is formed at one lower end of the side wall 18b welded to the upper rail 14. This boss 1
As shown in FIG. 2, 8f are formed on the lock bar holding member 18 at six positions. A through hole 18g is formed substantially in the center of the boss portion 18f.

The boss portion 18 of the lock bar holding member 18
The lock reinforcement bracket 34 is attached to the f by the rivet 32.
Is attached. The lock reinforcing bracket 34 is
Crank-shaped bending is applied to the steel plate, and has a deflection piece 34a directed upward, a deflection piece 34b directed downward, and a deflection portion 34c between the deflection pieces 34a, 34b. , The deflection piece 34a that is directed upward is the side wall 2 of the lock member 20.
The deflection piece 34b, which is arranged so as to be displaced toward the 0b side and is directed downward, is arranged so as to be displaced toward the boss portion 18f side of the lock bar holding member 18. A through hole 34d for inserting the lock bar 16 is formed in the above-mentioned deviation portion 34c, and a through hole 34e for inserting the rivet 32 is formed in the downwardly directed deviation piece 34b. It is set up.

The lock member 20 and the peeling prevention member 24 will be described with reference to FIG. The side wall 20b of the lock member 20 is provided with three lock holes 20a, 20a, 20a through which the lock bar 16 is inserted, as shown in FIG.
It is possible to fix the seat in the center position, forward position and backward position. A U-shaped piece 20c is formed above the side wall 20b of the lock member 20 to prevent the upper rail 14 from peeling off by engaging with the deviation piece 34a of the lock reinforcing bracket 34 in the event of a vehicle collision. Also, the side wall 20
The lock member 20 is provided below the lower rail 12b.
A dogleg-shaped wall 20d for fixing to is formed. On the other hand, the peeling prevention member 24 has a U-shaped piece 24c formed above the side wall 24b thereof to engage with the U-shaped piece 18d of the lock bar holding member 18 and prevent the upper rail 14 from peeling off. Below the side wall 24b, a doglegged wall 24d for fixing the separation preventing member 24 to the lower rail 12 is formed.

Next, a lock mechanism for sliding the lock bar 16 to lock the seat rail device 10 will be described with reference to FIG.
Will be described with reference to. A lever 52 for sliding the lock bar 16 is rotatably supported by a shaft 56, one end 52a of which is provided with an elliptical through hole 52b, and the other end 52c thereof is provided with a hook 52d. It is formed and is urged in the counterclockwise direction in the drawing by the tension spring 58. In the through hole 52b of the end portion 52a of the lever 52, as shown in FIG.
The shaft 54 communicating with the through hole 16a of the lock bar 16 shown in FIG. A wire 60 for rotating the lever 52 in the clockwise direction is connected to the hook 52d of the end 52c of the lever 52.

In the seat rail device 10 having the above-described structure, the operator adjusting the front and rear position of the seat lifts a hook (not shown) provided on the seat side, whereby the wire 60 is pulled and the urging force of the tension spring 58 is exerted. The lever 52 is rotated in the clockwise direction in FIG. As a result, the lock bar 16 moves downward in the drawing, and the lock member 2
The lock hole 20a provided in the side wall 20b of 0 is removed from the lock hole 20a to unlock. In this unlocked state, the operator applies a forward or backward force to the seat so that the upper rail 14 slidably held by the ball 28 and the roller 30 is moved to the lower rail 12.
Move up. The operator releases the hook at a desired seat position, so that the lock bar 16 is locked by the urging force of the tension spring 58 and the lock hole 20a of the lock member 20.
And the seat is fixed at this position.

The seat rail device 10 according to the present embodiment has an upper rail 1 to which a seat is attached in the event of a vehicle collision.
A force in the vehicle traveling direction is applied to 4. At this time, the through hole 18e of the lock bar holding member 18 through which the lock bar 16 fixing the upper rail 14 to the lower rail 12 side, the through hole 34d of the lock reinforcing bracket 34, and the lock member 20 are locked. A very large load is applied to the hole 20a. At this time, in the conventional seat rail device described above with reference to FIG. 6, since the distance between the side wall 18b of the lock bar holding member 18 and the side wall 20b of the lock member 20 is large, the load at the time of a vehicle collision is increased. But the rock bar 1
6, the side wall 18b of the lock bar holding member 18, and the side wall 20b of the lock member 20 are applied as a torsional load. On the other hand, in the present embodiment, the boss portion 18 which is formed at substantially the lower end of the side wall 18b of the lock bar holding member 18 and projects toward the side wall 20b side of the lock member 20 is projected.
Since the lock reinforcing bracket 34 is fixed to f, the lock reinforcing bracket 34 is arranged close to the lock member 20 side by the protruding height of the boss portion 18f. Therefore, in the seat rail device 10 of the present embodiment, the load at the time of vehicle collision is the lock bar 16, the through hole 34d of the lock reinforcing bracket 34, and the lock hole 2 of the lock member 20.
Since a shear load is applied between 0a, these members can maintain high lock strength.

Further, in the seat rail device 10 of the present embodiment, the lock bar holding member 18 is welded to the upper rail 14 at the lower end of the side wall 18b thereof, and the boss portion 18f is formed at the welded lower end thereof. The lower end of the lock reinforcing bracket 34 is fixed to the boss portion 18f by the rivet 32. The lower end of the lock bar holding member 18 has a boss portion 18f and is welded to the upper rail 14, and thus has a very high strength.
Since the lock reinforcing bracket 34 is fixed to the lower end of the lock bar holding member 18 having high strength, the lock bar holding member 18 is unlikely to be deformed by the load applied to the lock reinforcing bracket 34 during a vehicle collision. Therefore, the seat rail device 10 of the present embodiment can maintain a high lock strength.

Further, in this embodiment, since the lock reinforcing bracket 34 is fixed to the lock bar holding member 18 by the rivet 32, the lock reinforcing bracket 34 can be fixed at a low cost. Further, even if a large load is applied at the time of a vehicle collision, the lock reinforcing bracket 34 is difficult to peel off.

Further, in this embodiment, the through hole 3 for inserting the lock bar 16 of the lock reinforcing bracket 34 is inserted.
4d is provided in the deviation portion 34c between the deflection piece 34a directed upward and the deflection piece 34a directed downward, that is, in the portion having the highest strength bent in a crank shape. Even if a large load is applied to the through hole 34d during a vehicle collision, the lock reinforcing bracket 34 is not easily deformed.

FIG. 5 shows a cross section of a second embodiment of the seat rail device of the present invention. In the second embodiment, the same members as those in the first embodiment described above are designated by the same reference numerals and the description thereof will be omitted. In the first embodiment described above with reference to FIG. 3, the through-hole 34d through which the lock bar 16 of the lock reinforcing bracket 34 is inserted has a deflection piece 34a directed upward and a deflection piece 34b directed downward. Although it was provided in the eccentric portion 34c between them, in the second embodiment, the through hole 34d is provided in the side wall 20 of the lock member 20.
An upwardly directed deflection piece 3 arranged to be displaced toward the b side
It is attached to the side of 4a, that is, close to the lock hole 20a of the lock member 20. Therefore, the load at the time of vehicle collision is applied as a shear load between the lock bar 16, the through hole 34d of the lock reinforcing bracket 34, and the lock hole 20a of the lock member 20, and these members can maintain high lock strength. .

[0026]

As described above, in the seat rail device of the present invention, the lock reinforcing member is fixed to the boss portion that is formed at substantially the lower end of the side wall of the lock bar holding member and projects toward the side wall side of the lock member. Therefore, the lock reinforcing member is arranged closer to the lock member side by the protruding height of the boss portion. Therefore, the load at the time of a vehicle collision is applied as a shear load between the lock bar, the through hole of the lock reinforcing member, and the through hole of the lock member, so that these members can maintain high lock strength. Further, the lock bar holding member is joined to the upper rail at substantially the lower end of the side wall thereof, and a boss portion is formed at the joined substantially lower end thereof, and the substantially lower end of the lock reinforcing member is fixed to the boss portion by a fixing means. Fixed. The substantially lower end of the lock bar holding member has a very high strength because it is joined to the upper rail and the boss portion is formed. Since the lock reinforcing member is fixed to approximately the lower end of the lock bar holding member having high strength, the lock bar holding member is hard to be deformed even with a load applied to the lock reinforcing member during a vehicle collision. Therefore, the seat rail device of the present invention can maintain high lock strength.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat rail device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the seat rail device according to the first embodiment.

3 is a cross-sectional view taken along the line GG in FIG.

4 is a cross-sectional view of the upper rail and the lower rail of FIG.

FIG. 5 is a sectional view of a seat rail device according to a second embodiment.

FIG. 6 is a sectional view of a seat rail device according to a conventional technique.

[Explanation of symbols]

10 Seat rail device 12 Lower rail 14 Upper rail 16 Rock bar 18 Lock bar holding member 20 Lock member 34 Lock reinforcement bracket

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-194947 (JP, A) Actual opening Sho-60-37438 (JP, U) Actual opening Sho-52-151529 (JP, U) Actual opening Sho-62- 52059 (JP, U) Actual development Sho 54-84728 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60N 2/00-2/72

Claims (3)

(57) [Claims] 1. An upper rail; a lower rail; a pair of side walls having a through hole formed therein for holding a lock bar slidably at a right angle to a traveling direction of a vehicle, and the side walls are substantially formed. A lock bar holding member joined to the upper rail at the lower end, and a plurality of through holes for inserting the lock bar, and a side wall arranged along one side wall of the lock bar holding member, A seat rail device having a lock member attached to a lower rail, wherein the lock bar holding member located on the side wall side of the lock member projects toward the side wall side of the lock member at a substantially lower end of the side wall of the lock bar holding member. A lock reinforcing member having a plurality of bosses formed therein, and a through hole through which the lock bar is inserted corresponding to the through hole of the lock member. It formed Ri from a fixed and locked reinforcing member to the part, a crank shape in which the locking reinforcing member has a pair of deflection piece
The steel plate formed on the
It is arranged so that it is displaced toward the side wall of the member, and the lower deflection piece is
The lock bar holding member is arranged so that it is displaced toward the boss side.
The seat rail device is characterized in that it is fixed by rivets as the fixing means . Wherein wherein the first term, characterized in that the through hole of the lock reinforcement member for inserting the locking bar is provided on the deflection portion between the upper deflection piece and a lower deflection piece Seat rail device. 3. A seat rail apparatus of paragraph 1, wherein the through hole of the lock reinforcement member for inserting the locking bar is provided above the deflection strip.