JPH08156659A - Automobile seat sliding device - Google Patents

Abstract

PURPOSE: To provide a seat sliding device strong to large load and low in machining cost and parts cost. CONSTITUTION: Sliding members 8 are fittingly fixed to the respective edges of the raised wall 7a and bottom wall 7b of an upper rail 7, and folded parts 6c, 6d folded approximately in U-shape so as to be fitted to the respective sliding members 8 of the upper rail 7 are formed at the respective edges of the raised wall 6a and bottom wall 6b of a lower rail 6. Rollers 9 are interposed between the inner surface of the bottom wall 6b of the lower rail 6 and the outer surface of the bottom wall 7b of the upper rail 7. A longitudinal pair of cut-and-raised parts 6g, 6h are formed at the raised wall 6b of the lower rail 6, with a space corresponding to the sliding stroke of the upper rail 7, and a lock plate 11 with a stopper part 11c formed to come in contact with the respective cut-and-raised parts 6g, 6h of the lower rail 6 at the sliding front end part and sliding rear end part of the upper rail 7 is disposed at the upper rail 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat slide device which is particularly strong against a large vertical load.

[0002]

2. Description of the Related Art Conventionally, as a vehicle seat sliding device, as shown in FIG. 3, a rectangular tubular lower rail 1 fixed to the vehicle body side and a U-shaped upper rail 2 fixed to the seat side. Are fitted to each other through the sliding members 3 and 4 and the roller 5 so as to be slidable back and forth (actual fair 2-48).
247).

[0003]

However, when a large load P acts on the slide device from the seat side, the large load P acts from the rising portion 2a of the upper rail 2 to the U-shaped bent portion 2b. Therefore, there is a problem that the upper rail 2 may be deformed. Further, since the rails 1 and 2 are bent into a complicated cross-sectional shape, the processing cost is high, and since the sliding members 3 and 4 need to have two kinds of complicated cross-sectional shapes, the parts cost is also high. There was also a problem.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a slide device for an automobile seat which is strong against a large load in the vertical direction and which is inexpensive in processing and parts cost. .

[0005]

In order to achieve the above object, the present invention is an automobile in which a lower rail fixed to the vehicle body side and an upper rail fixed to the seat side are fitted so as to be slidable back and forth. In the slide device for a vehicle seat, the lower rail and the upper rail are each formed in a substantially L shape, and the inner surfaces of the lower rail standing wall and the bottom wall and the outer surfaces of the upper rail standing wall and the bottom wall are spaced at predetermined intervals. On the other hand, sliding members are respectively fitted to the end of the standing wall and the end of the bottom wall of the upper rail, and the upper rail is mounted on the end of the standing wall and the end of the bottom wall of the lower rail. U-shaped folded-back portions are formed so as to fit with the respective sliding members, and rollers are interposed between the inner surface of the bottom wall of the lower rail and the outer surface of the bottom wall of the upper rail. Setting There is provided a sliding device for an automobile seat, characterized in that it is.

A pair of front and rear cut-and-raised parts are formed on the standing wall of the lower rail at intervals corresponding to the sliding stroke of the upper rail, and the upper rail has a sliding front end and a sliding rear end. It is preferable to dispose a lock plate having a stopper portion that abuts each cut-and-raised portion of the lower rail.

[0007]

According to the present invention, each of the lower rail and the upper rail is formed in a substantially L shape, and the sliding member fitted to the end portion of the standing wall and the end portion of the bottom wall of the upper rail is connected to the standing wall of the lower rail. A large load from the seat side is slid by fitting the folded portions formed at the end portion and the end portion of the bottom wall and interposing a roller between the bottom wall of the lower rail and the bottom wall of the upper rail. When it acts on, the heavy load is
Since it acts directly on the flat bottom wall of the upper rail and is distributed to the flat bottom wall of the lower rail via the rollers, the slide operation load is lightened and smooth sliding is possible.

On the other hand, a pair of front and rear cut-and-raised portions formed on the bottom wall of the lower rail are brought into contact with stopper portions of a lock plate arranged on the upper rail at a sliding front end portion and a sliding rear end portion of the upper rail, respectively. It can be used as a stopper. That is, when the automobile seat is a power seat that is moved back and forth by an electric motor, instead of the stopper portion of the lock plate arranged on the upper rail as in the present invention, the front and rear surfaces of the transmission case of the electric motor are cut by the lower rail. If the contact is made with the raised portion, a stopper is conventionally provided between the slide screw and the slide nut, so that so-called "bite" occurs between the slide screw and the slide nut. Although there is a possibility that it cannot rotate in the reverse direction, the above-mentioned accident can be prevented by configuring the present invention.

[0009]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in FIG. 1, a vehicle seat slide device includes a metal lower rail 6 fixed to a vehicle body side,
It is provided with a metal upper rail 7 fixed to the seat side.

The lower rail 6 and the upper rail 7 are formed by bending each in an approximately L shape at 90 degrees, and as shown in FIG. 2A, the standing wall 6 of the lower rail 6 is formed.
On the inner surfaces of a and the bottom wall 6b, the outer surfaces of the standing wall 7a and the bottom wall 7b of the upper rail 7 are arranged with a predetermined gap therebetween. An upper end portion of the standing wall 7a and an inner end portion of the bottom wall 7b of the upper rail 7 are separated from each other by a gap in the center portion in the front-rear direction,
The sliding members 8, ..., 8 each having a substantially U-shaped cross section are fitted to each other. The upper end and the bottom wall 6 of the standing wall 6a of the lower rail 6
At the inner end portion of b, folded-back portions 6c and 6d which are folded back in a substantially U shape so as to be fitted to the respective sliding members 8 of the upper rail 7 are formed.

Rollers 9, which are held by retainers 15, 15, are provided at front and rear portions between the inner surface (upper surface) of the bottom wall 6b of the lower rail 6 and the outer surface (lower surface) of the bottom wall 7 of the upper rail 7. 9 are provided respectively. Roller stopper portions 6e, 6 are provided on the front and rear portions of the bottom wall 6b of the lower rail 6 to prevent the rollers 9, 9 from rolling more than necessary.
e and 6f, 6f are formed by punching in an arc shape from the outer surface (lower surface) side of the bottom wall 6b to the inner surface (upper surface) side.

At the falling portion of the folded portion 6c of the standing wall 6a of the lower rail 6, a pair of front and rear cut-and-raised portions (stopper portions) are cut and raised inward at intervals corresponding to the sliding stroke L of the upper rail 7. 6g and 6h are formed.

As shown in FIG. 1, in the standing wall 6a of the lower rail 6, lock holes 6i, ..., 6 for locking the upper rail 7 at a predetermined sliding position are arranged at regular intervals in the front-rear direction.
i is formed. Further, bracket portions 7e, 7e rising in the inner surface direction are provided at the center portion of the standing wall 7a of the upper rail 7 in the front-rear direction.
The operation lever 10 extending in the front-rear direction is rotatably supported by e and 7e, and both bracket portions 7 are provided.
The lock plate 11 is non-rotatably fitted to the operating lever 10 between the e and 7e by the semicircular detent portions 10a and 11a. A spring 12 that urges the lock plate 11 in the lock direction together with the operation lever 10 is wound around the rear end of the operation lever 10.

That is, in the operation lever 10, the lock claws 11b, ..., 11b at the lower portion of the lock plate 11 are made to pass through the through hole 7 of the upper rail 7 by the spring 12.
, 7f is urged so as to engage with any of the lock holes 6i, ..., 6i of the lower rail 6 (see arrow R in FIG. 1), and the operating lever 10 When the operation portion 10b at the front end is lifted upward (see arrow U in FIG. 1), the lock plate 11 rotates in the unlock direction together with the operation lever 10 against the urging force of the spring 12, and the lock plate 11 moves. Each lock claw 11b,
..., 11b are the lock holes 6i, ..., 6i of the lower rail 6.
You can get out of it and unlock it.

A stopper portion 11c that rises upward is provided on the upper portion of the lock plate 11, and the stopper portion 11c is a slide front end portion and a slide rear end portion of the upper rail 7 and is provided at each cut portion of the lower rail 6. Raised part 6g, 6
It comes into contact with h, respectively. That is, the lock plate 11 is attached to the cut-and-raised portion 6g on the front side of the lower rail 6.
When the front edge 11d of the stopper portion 11c of the upper rail 7 abuts, the front sliding of the upper rail 7 is stopped, and the lock plate 11 is attached to the cut-and-raised portion 6h on the rear side of the lower rail 6.
When the rear side edge 11e comes into contact, the rear sliding of the upper rail 7 is stopped.

At the front and rear portions of the inner surface (upper surface) of the bottom wall 7b of the upper rail 7, a bracket 1 for fixing a seat cushion 14 almost directly above the rollers 9, 9 is provided.
3, 13 are attached.

With the above construction, the lower rail 6 and the upper rail 7 are formed by bending them into a substantially L-shape, and the sliding members 8 at the respective ends of the upper rail 7 are connected to the respective ends of the lower rail 6. By fitting the folded-back portions 6c and 6d of the lower portion, and by providing the roller 9 between the bottom wall 6b of the lower rail 6 and the bottom wall 7b of the upper rail 7, the rollers 9 are provided.
As shown in (A), when a large load P from the seat cushion 14 acts on the slide device, this large load P
Acts directly on the flat bottom wall 7b of the upper rail 7 from the bracket 13 and is distributed to the flat bottom wall 6b of the lower rail 6 via the rollers 9, so that no moment load is applied to the upper rail 7. Since the upper rail 7 is not likely to be deformed, the slide operation load is lightened and the slide can be smoothly performed.

Further, since each of the rails 6 and 7 is simply bent into a simple L-shaped cross section, the processing cost is reduced. Further, since the sliding member 8 can be used by cutting one type having a simple substantially U-shaped cross-sectional shape with an appropriate length, the cost of parts can be reduced.

As shown in detail in FIG. 2C, the sliding member 8 has an arcuate portion 8 which comes into contact with the folded-back portions 6c and 6d of the lower rail 6 at a constant pitch in the front-rear direction.
When a, ... Are formed, the contact resistance with the folded-back portions 6c and 6d is reduced, the upper rail 7 slides smoothly, and the upper rail 7 can be prevented from rattling due to the elasticity of each arc portion 8a. .

[0020]

As is apparent from the above description, in the sliding device for a vehicle seat of the present invention, the lower rail and the upper rail are each formed in a substantially L shape, and the sliding member is fitted to the upper rail. Since the folded part of the lower rail is fitted and the roller is provided between the lower rail and the upper rail, when a large load from the seat side acts on the slide device, the large load is applied to the upper rail. It directly acts on the flat bottom wall of and is distributed to the flat bottom wall of the lower rail via rollers,
There is no risk of the upper rail deforming. Further, since each rail is simply bent into a simple L-shaped cross-sectional shape, the processing cost is low, and since the sliding member need only have one simple cross-sectional shape, the parts cost is also low. Become.

Further, the stopper portion of the lock plate disposed on the upper rail is brought into contact with the cut-and-raised portion of the lower rail at the sliding front end portion and the sliding rear end portion of the upper rail to form stoppers. Separate parts for the stopper are not required, and the parts cost is reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an automobile seat slide device of the present invention.

2A is a sectional view taken along the line AA of FIG. 1, FIG. 2B is a sectional view taken along the line BB of FIG. 1, and FIG. 2C is a perspective view of a modified example of the sliding member.

FIG. 3 is a cross-sectional view of a conventional vehicle seat slide device.

[Explanation of symbols]

 6 Lower rail 6a Standing wall 6b Bottom wall 6c, 6d Folding part 6g, 6h Cut and raised part 7 Upper rail 7a Standing wall 7b Bottom wall 8 Sliding member 9 Roller 11 Lock plate 11c Stopper part 14 Seat cushion L Sliding stroke.

Claims (2)

[Claims] 1. A vehicle seat slide device in which a lower rail fixed to the vehicle body side and an upper rail fixed to the seat side are fitted so as to be slidable back and forth, wherein the lower rail and the upper rail are respectively The upper rail and the bottom wall are formed in a substantially L shape, and the upper rail and the bottom wall have inner surfaces that are spaced apart from each other by a predetermined distance. And sliding members are respectively fitted to the end portions of the bottom wall and the bottom wall, and substantially U-shaped so that the sliding members of the upper rail can be fitted to the end portions of the standing wall and the bottom wall of the lower rail. A sliding device for an automobile seat, characterized in that each of the folded-back portions is formed and a roller is provided between the inner surface of the bottom wall of the lower rail and the outer surface of the bottom wall of the upper rail. 2. A pair of front and rear cut-and-raised portions are formed on a standing wall of the lower rail at intervals corresponding to a sliding stroke of the upper rail, and the upper rail is provided with:
2. A vehicle according to claim 1, further comprising: a lock plate having stopper portions formed at the sliding front end portion and the sliding rear end portion of the upper rail, the stopper portions contacting the cut and raised portions of the lower rail, respectively. Seat slide device.