JPH07304361A - Seat rail device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a seat rail device having a high lock strength and allowing a latch plate holder to be freely arranged regardless of the roller position. The lock pawls 28a of the latch plate 28 are inserted through the slits 30e of the slit plate 30a 'and engage with the lock teeth 26 of the fixed rail 12, so that the movable rails 14 are fixed to the movable rail 14 in the event of a vehicle collision. When a load is applied in the vehicle traveling direction, this load is applied to the lock pawl 28.
A shear load is applied between the slit 30e of the slit plate 30a 'and the lock tooth 26 of the fixed rail 12 which are disposed in proximity to a. Therefore, high lock strength can be realized.

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 At present, anchors of seat belts are attached to the seat side so that the seat belt is always adapted to an occupant regardless of the seat position. That is, when the anchor of the seat belt is attached to the floor side of the vehicle body, the manner in which the seat belt is applied to the occupant differs depending on the position where the seat is advanced and the position where the seat is retracted. When this seat belt is attached to the seat side,
A large load is applied to the seat rail device for front and rear adjustment of the seat.
Specifically, in order to ensure the safety of the occupant in a frontal collision of about 50 km / h, it is necessary to be configured to withstand a load of about 1 ton. In order to meet such a requirement, recently, a movable rail has an inverted T-shaped cross section, a fixed rail for slidably holding the movable rail has a substantially C-shaped cross section, and the movable rail is erected at both ends of the inverted T-shaped cross section. A seat rail device is used in which a piece is provided and a hanging piece is provided at an opening of the fixed rail having a substantially C-shaped cross section. In this seat rail device, since the movable rail has an inverted T-shaped cross section, it is easy to fix the seat belt anchor to the vertical leg portion of the seat rail device. The movable rail is difficult to separate due to the deformation of the seat rail device, even if a large force pulling the seat belt anchor upward is applied at the time of a vehicle collision due to the piece and the hanging piece provided in the opening of the fixed rail having a substantially C-shaped cross section. There is.

This type of seat rail device has a latch mechanism for fixing a movable rail to a fixed rail so as to be movable back and forth. This latch mechanism includes a lock tooth row formed on a side wall of a fixed rail in the longitudinal direction thereof, a latch plate having a lock claw that engages with the lock tooth row, and a latch that rotatably holds the latch plate. It consists of a plate holder. This latch mechanism is also required to have a high lock strength so that the movable rail does not move forward when the vehicle collides as described above.

Various methods have been proposed in order to give this latch mechanism a high locking strength. One of them is JP-A-62-238136. Here, as shown in FIG. 5, a latch plate 28 having a lock claw 28a is attached to a latch plate holder 30 attached to the movable rail 14 side by a shaft 32.
To rotatably support. Then, the lock claw 28
The lock teeth 26 that engage with a are provided on the fixed rail 12 side,
Further, the auxiliary lock tooth 46 that engages with the lock pawl 28a.
The reinforcing plate 44 having the is attached to the movable rail 14 side. By inserting the lock claw 28a into the lock tooth 26 of the fixed rail 12 and the auxiliary lock tooth 46, detachment due to deformation of the lock claw 28a during a vehicle collision is prevented. In addition, as another method, the actual Kaihei 3-
There is 53331 issue. Here, as shown in FIG. 6, instead of using the reinforcing plate, auxiliary lock teeth 46 are formed on the movable rail 14 side, and the lock claws 28 a are inserted into the lock teeth 26 of the fixed rail 12 and the auxiliary lock teeth 46. This prevents the lock claw 28a from being detached due to deformation.

[0005]

However, in the conventional seat rail device, since the lock tooth 26 of the fixed rail 12 and the auxiliary lock tooth 46 are separated from each other, the lock claw 28a inserted into both of them. Since a twist is applied at the time of a vehicle collision, the lock pawl 28a is required to have high strength.

Further, in order to obtain a required lock strength, as shown in FIGS. 5 and 6, the tip 28a 'of the lock claw 28a is in a locked state from the roller 18 arranged below the movable rail 14. Is also configured to go inside. Therefore, the latch plate holder 30 for holding the latch plate 28 needs to be attached at a position avoiding the roller 18 so that the lock claw 28a and the roller 18 do not interfere with each other. However, at the bottom of the seat, a height adjuster mechanism for adjusting the seat height is further provided in addition to the slide mechanism for enabling the seat to move back and forth. Ingredient 3
When 0 is set, it becomes difficult to arrange the height adjuster mechanism. Therefore, it becomes necessary to adjust the seat height via a complicated link.

Further, as shown by the chain double-dashed line in FIGS. 5 and 6, the lock claw 28a is in the half-locked state, that is,
The lock claw 28a is inserted into the lock tooth 26 of the fixed rail 12 to lock the seat rail.
If the tip 28a 'is not hooked on the auxiliary lock tooth 46, it is not possible to obtain sufficient lock strength as described above, and it was expected that a dangerous state could occur in the event of a vehicle collision.

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. Another object of the present invention is to provide a seat rail device in which the latch plate holder can be freely arranged regardless of the roller position.

[0009]

In order to achieve the above object, the seat rail device of the present invention has, in the first aspect, an opening at the top and a locking tooth row along the longitudinal direction on the side wall. A fixed rail having a substantially C-shaped cross section;
A movable rail having a substantially T-shaped cross section in which a horizontal head portion is slidably positioned in the fixed rail and a vertical leg portion projects upward from an opening portion of the fixed rail; and a lock tooth row of the fixed rail. A seat rail device, comprising: a latch plate having locking claws that fit together; a latch plate holder attached to the movable rail and rotatably holding the latch plate, wherein the latch plate holder is the fixed rail. Has a slit plate which is provided substantially along the side wall of the latch plate and has a slit formed so as to correspond to the lock tooth row, and the lock claw of the latch plate is inserted through the slit of the slit plate and fixed. It is characterized in that it engages with a lock tooth row of a rail.

In order to achieve the above object, the seat rail device of the present invention is, in the second aspect, a substantially C-shaped cross section having an opening at the top and a lock tooth row along the longitudinal direction on the side wall. A fixed rail; a movable rail having a substantially T-shaped cross section in which a horizontal head portion is located in the fixed rail and a vertical leg portion is projected upward from an opening of the fixed rail;
A latch, which is interposed between a horizontal head of the movable rail and a bottom wall of the fixed rail, slidably supports the movable rail, and a latch having a lock claw that engages with a lock tooth row of the fixed rail. A seat rail device comprising: a plate; and a latch plate holder attached to the movable rail and rotatably holding the latch plate, wherein the latch plate holder is close to a side wall of the fixed rail. A slit plate having a slit formed corresponding to the lock tooth row, and the lock claw of the latch plate is inserted into the slit of the slit plate to engage with the lock tooth row of the fixed rail. In addition, the lock claw of the latch plate is formed to have a length that does not interfere with the roller when engaged with the lock tooth row of the fixed rail.

[0011]

In the seat rail device configured as described above, in the first aspect, the slit plate is provided in proximity to the side wall of the fixed rail, and the lock claw of the latch plate inserts the slit of the slit plate. Since it engages with the lock tooth row of the fixed rail, when a load is applied to the movable rail in the vehicle traveling direction at the time of a vehicle collision, this load is applied to the slit arranged close to the lock claw. A shear load is applied between the slit of the plate and the lock tooth row of the fixed rail. Therefore, high lock strength can be realized.

Further, in the seat rail device configured as described above, in the second aspect, the tip is short so as not to interfere with the roller when the lock claw of the latch plate engages with the lock tooth row of the fixed rail. In addition, since the slit plate is provided substantially along the side wall of the fixed rail and the lock claw of the latch plate is inserted through the slit of the slit plate and engages with the lock tooth row of the fixed rail, the load at the time of vehicle collision However, a high lock strength can be realized by applying a shear load to the lock claw between the slit plate arranged in close proximity to the lock tooth row of the fixed rail. Since the locking claws do not interfere with the rollers in this manner, it is not necessary to attach the latch plate holder to the position avoiding the rollers, and the degree of freedom in designing the seat rail device is increased.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a partially cutaway perspective view of a seat rail device according to an embodiment of the present invention, FIG. 2 is a side view of the seat rail device of FIG. 1, and FIG. 3 is a sectional view taken along line GG of FIG. is there. The seat rail device 10 includes a substantially C-shaped fixed rail 12 and a substantially T-shaped movable rail 14. The substantially C-shaped fixed rail 12 is provided with bolts 2 as shown in FIG.
Fixed by 0 to the floor of the vehicle. On the other hand, an anchor plate 22 is attached to the upper part of the movable rail 14, and an anchor hole 22a is formed at the top of the anchor plate 22 to connect an anchor of a seat belt (not shown). Further, a seat fixing plate 24 for fixing a seat (not shown) is attached to a side portion of the anchor plate 22. A pair of this seat rail device 10 is provided,
Hold the seat adjustably in the front-back direction (left-right direction shown in FIG. 2).

As shown in FIG. 3, the substantially C-shaped fixed rail 12 is composed of a bottom wall 12a, a side wall 12b, a top wall 12c, and a hanging piece 12d, and is open upward between the top walls 12c and 12c. Has an opening 12e. The substantially T-shaped movable rail 14 is formed by joining a pair of L-shaped steel plates 14c back to back, and has a horizontal head 14a disposed inside the fixed rail 12 and an opening 12e of the fixed rail 12. A vertical leg portion 14b protruding upward from the
Standing pieces 1 that are directed upward at both outer ends of the horizontal head 14a.
4d is formed.

A ball 16 is arranged between the horizontal head portion 14a and the standing piece 14d of the movable rail 14 and the top wall 12c of the fixed rail 12, while the movable rail 1 is provided.
Rollers 18a and 18b are arranged between the horizontal head portion 14a of No. 4 and the bottom wall 12a of the fixed rail 12, and the movable rail 14 slides on the fixed rail 12 by the balls 16 and the rollers 18a and 18b. Holds movably. The ball 16 and the rollers 18a and 18b are positioned by a retainer (not shown).

As shown in FIG. 2, a plurality of lock teeth 26 are formed in the longitudinal direction on the side walls 12b on both sides of the fixed rail 12. A lock claw 28a that meshes with the lock tooth 26
Are formed on the latch plate 28 (see FIG. 3). The latch plate 28 is formed by bending the lower end portion of one steel plate counterclockwise in FIG.
The pair of bracket plates 28b, 28b are formed by bending the front and the back) at substantially right angles. This bracket plate 2
A shaft hole 28 for passing the shaft 32 is provided at the upper ends of 8b and 28b.
c is provided, and a through hole 28d for inserting a hook (not shown) is provided at the lower end. The shaft 32 is joined to the bracket plates 28b, 28b by welding.

The latch plate 28 is rotatably held by the latch plate holder 30 by the shaft 32 described above. The latch plate holder 30 is formed by bending a single steel plate in a crank shape to form a crank portion 30a, and bending both ends (front and rear in FIG. 3) of the pair of bracket plates 30b at a substantially right angle. 30b is formed. A shaft hole 30c for inserting a shaft 32 that rotatably holds the latch plate 28 is formed at a substantially central portion of the bracket plates 30b, 30b. Also, at the upper end of the crank portion 30a,
A through hole 30d is bored, and the latch plate holder 30 is attached to the movable rail 14 by a bolt 34 passing through the through hole 30d.
Fixed to the side. At the same time, the movable rail 14 and the anchor plate 22 are connected by the bolt 34. On the other hand, at the lower end of the crank portion 30a, as shown in FIG.
A slit 30e for inserting a is formed.
Crank portion 30a in which this slit 30e is formed
The lower end portion (hereinafter referred to as the slit plate 30a ') of the above is closely arranged along the side wall 12b of the fixed rail 12 as shown in FIG. As shown in FIG. 1, a torsion spring 36 is attached to one end of the shaft 32 that passes through the bracket plates 30b and 30b, and biases the latch plate 28 counterclockwise in the drawing.

In the locked state of the seat rail device 10 of this embodiment, the lock claw 28a of the latch plate 28 is penetrated by the torsion spring 36 through the slit 30e provided in the slit plate 30a 'and the lock rail 28a on the fixed rail 12 side is provided. It meshes with the lock teeth 26. The tip 28a 'of the lock claw 28a is formed so as to slightly project into the fixed rail 12 to avoid interference with other members. On the other hand, in the seat rail device 10, when the latch plate 28 is rotated clockwise against the biasing force of the torsion spring 36 by a hook (not shown) that engages with the through hole 28d of the latch plate 28, the lock claw 28a is released. Is removed from the lock teeth 26 and unlocked.

In the seat rail device 10 having the above structure, the latch plate 28 is rotated clockwise as described above when the operator adjusting the front and rear position of the seat pulls a hook (not shown) provided on the seat side. Moved and locked claw 28
a is disengaged from the lock teeth 26 and unlocked. In this unlocked state, the operator is in front of the seat, or
The movable rail 14 slidably held by the ball 16 and the roller 18 by applying a rearward force.
Moves in the fixed rail 12. The operator releases the hook at a desired seat position so that the biasing force of the torsion spring 36 causes the lock claw 28a to move to the slit plate 3.
The slit 30e of 0a 'penetrates and meshes with the lock tooth 26 on the fixed rail 12 side, and the seat is fixed at this position.

In the seat rail device 10 of this embodiment, a force in the vehicle traveling direction is applied to the movable rail 14 to which the seat is attached at the time of a vehicle collision. At this time, the movable rail 1
A very large load is applied to the lock claw 28a that locks the No. 4 lock. However, the slit plate 30a 'is provided substantially along the side wall 12b of the fixed rail 12, and the lock claw 28a of the latch plate 28 is inserted through the slit 30e of the slit plate 30a' so that the lock teeth 26 of the fixed rail 12 are inserted.
Since the above-mentioned load is engaged with the slit claw 28a, the slit 3 of the slit plate 30a 'arranged close to the lock claw 28a is applied.
0e and the row of the lock teeth 26 of the fixed rail 12 are applied as a shearing load, and the lock claw 28a has a shear load of FIG.
The bending load described above with reference to is not applied. Therefore, the lock claw 28a can withstand a high load and can maintain a very high lock strength.

As shown by the chain double-dashed line in FIG. 3, the lock claw 28a is in a half-locked state, that is, the tip 28a 'of the lock claw 28a has the lock teeth 2 of the fixed rail 12.
Even when it is not completely inserted into 6, the load at the time of vehicle collision is applied to the lock claw 28a as a shear load between the slit 30e and the row of the lock teeth 26 as described above, so that a high lock strength is obtained. Can be kept. Therefore,
Even if an accident occurs in a state where the lock is not completely achieved, it is possible to ensure the safety of the occupants.

FIG. 4 shows a side view of the 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. Since the cross section of the second embodiment is similar to that of the first embodiment, it will be described with reference to FIG. 3 described above. In the first embodiment described above with reference to FIG. 2, the latch plate holder 30 is attached to the movable rail 14 at a position different from that of the roller 18a. However, in the second embodiment, the roller 18a is attached.
It is attached to the side of. FIG. 3 shows a cross section of the seat rail device of the second embodiment. In the second embodiment, the tip 28a 'of the lock claw 28a is fixed to the fixed rail 12
The roller 18 is formed so as to slightly project into the inside.
It does not interfere with a. Therefore, in the second embodiment, the height adjuster mechanism for adjusting the seat height can be attached to the position where the latch plate holder 30 was attached in the first embodiment. In the prior art seat rail device described above with reference to FIGS. 5 and 6,
Since it is necessary to mount the latch plate holder 30 while avoiding the rollers 18a and 18b, the position where the height adjuster mechanism is provided is limited by the latch plate holder 30, but according to the present embodiment, the desired position is set. A height adjuster mechanism can be attached to.

[0023]

As described above, in the seat rail device of the present invention, the slit plate is provided in close proximity to the side wall of the fixed rail, and the lock claw of the latch plate is inserted through the slit of the slit plate to fix the fixed rail. Because it engages with the lock teeth,
When a load is applied to the movable rail in the vehicle traveling direction at the time of a vehicle collision, the load is applied between the slit of the slit plate arranged close to the lock pawl and the lock tooth row of the fixed rail. Applied as a shear load. Therefore, high lock strength can be realized. Further, since the lock claw does not interfere with the roller, it is not necessary to attach the latch plate holder to the position avoiding the roller, and the degree of freedom in designing the seat rail device can be increased.

[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 side view of the seat rail device according to the first embodiment.

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

FIG. 4 is a side view of a seat rail device according to a second embodiment.

FIG. 5 is a cross-sectional view of a seat rail device according to a conventional technique.

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

[Explanation of symbols]

 10 Seat Rail Device 12 Fixed Rail 14 Movable Rails 18a, 18b Roller 26 Lock Teeth 28 Latch Plate 30 Latch Plate Holder

Claims (2)

[Claims] 1. A fixed rail having a substantially C-shaped cross-section, which has an opening at the top and a lock tooth row along a longitudinal direction on a side wall; and a horizontal head is slidably positioned in the fixed rail. A movable rail having a substantially T-shaped cross section for projecting a vertical leg portion upward from an opening of the fixed rail; a latch plate having a lock claw that engages with a lock tooth row of the fixed rail; attached to the movable rail And a latch plate holder for rotatably holding the latch plate, wherein the latch plate holder is provided substantially adjacent to a side wall of the fixed rail and the lock tooth row is provided. A slit plate having a slit formed so as to correspond to the lock plate, wherein the lock claw of the latch plate is inserted through the slit of the slit plate and engages with the lock tooth row of the fixed rail. That the seat rail system. 2. A fixed rail having a substantially C-shaped cross section, which has an opening at the top and has lock teeth on the side wall along the longitudinal direction; a horizontal head is located in the fixed rail, and a vertical leg is provided. A movable rail having a substantially T-shaped cross section for projecting upward from the opening of the fixed rail; and interposing between a horizontal head of the movable rail and a bottom wall of the fixed rail, the movable rail being slidable A seat rail having a roller supported on the movable rail, a latch plate having a lock claw that engages with a lock tooth row of the fixed rail, and a latch plate holder attached to the movable rail and rotatably holding the latch plate. In the device, the latch plate holder includes a slit plate that is provided substantially along a side wall of the fixed rail and has a slit formed to correspond to the lock tooth row, The lock claw of the plate is inserted through the slit of the slit plate and engages with the lock tooth row of the fixed rail, and the lock claw of the latch plate interferes with the roller when engaged with the lock tooth row of the fixed rail. A seat rail device characterized in that the seat rail device is formed in a length that does not exist.