JPH0781467A - Seat slide device - Google Patents

Abstract

PURPOSE:To provide many slide strokes with a simple structure by providing rollers for supporting the terminal part of an upper rail in the getting in and off a car body of an occupant while rotatably shaft-supporting the roller between the front side roller and rear side roller. CONSTITUTION:A lower rail 10 is provided with rollers 13, 14 and 15. When a seat cushion 12 is moved forward, the terminal end 25 of an upper rail 11 can be moved to the roller 14 in the central part 22 after passing by the rear side 21 roller 15. As a result, many slide strokes are provided for a passenger getting in and off a car. Since then he is not seated on the seat cushion 12, the front side 20 roller 13 and central part 22 roller 14 can bear a load of the cushion 12 as shown by A. In the normal range of the movement, the terminal end 25 of the seat cushion 12 as shown by B is supported without getting over the roller 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat slide device for movably supporting a seat with respect to a vehicle body.

[0002]

2. Description of the Related Art As a prior art of this type of seat slide device, the one disclosed in Japanese Utility Model Laid-Open No. 3-8930 is known. This is an upper rail fixed to the seat cushion side, a lower rail fixed to the vehicle body side,
A two-stage slide device including a rail movably mounted between an upper rail and a lower rail.
Many slide strokes were obtained by using a stepped rail.

[0003]

The seat slide device described above uses a two-stage rail to increase the slide stroke distance. However, when the rail has two stages, the structure of the slide device becomes complicated. However, there are problems such as high cost. Further, a fixed roller type is also used, but the end portion of the upper rail is stopped by the rear roller fixed to the lower rail, and the sliding stroke is shortened. In the case of this fixed roller type, if the distance between the rollers is shortened, the distance of the slide stroke can be increased, but it becomes impossible to bear the load when seated on the seat and the load of the belt anchor.

Although it is possible to increase the length of the upper rail on the non-fixed side, the upper rail cannot be made longer than the length of the seat cushion.

An object of the present invention is to simplify the structure and obtain many sliding strokes.

[0006]

Means for Solving the Problems The measures taken in the present invention to solve the above problems are as follows: a lower rail fixed to the vehicle body side, an upper rail fixed to the seat cushion side, and front and rear sides of the lower rail. In a seat slide device having a roller that is rotatably supported on the side and a roller that movably supports the upper rail, while being rotatably supported between a front roller and a rear roller, That is, it has a roller for supporting the end portion of the upper rail in the getting on / off state.

[0007]

According to the above-mentioned means, when the seat cushion is moved by the roller provided between the front roller and the rear roller when the passenger gets on and off, the end portion of the seat cushion is provided at the central portion. Can be moved up to the roller. As a result, the slide stroke can be increased as compared with the lower rail having the same length without changing the length of the upper rail. Further, the structure can be made simpler than the two-stage slide device. Since the load of the seated person and the load of the belt anchor are not applied to the seat cushion in the getting on / off state, the seat cushion can be supported by the front roller and the central roller.
When seated, the front cushion and the rear cushion support the seat cushion, so that the seat cushion can bear the load of the seated person and the load of the belt anchor. Therefore, many slide strokes can be obtained by using a simple structure.

[0008]

Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the seat slide device includes a lower rail 10 fixed to a vehicle body side through a mounting member, an upper rail 11 fixed to a seat cushion 12, and a roller pivotally supported by the lower rail 10. 13 and 13.

As shown in FIG. 2, the upper rail 11
Is a pair of side walls 23 facing each other and the seat cushion 1
The engaging portion 1 has an inverted U-shaped cross section with an upper facing wall 24 fixed to the second side, and extends inward at both ends thereof.
6 is formed. The lower rail 10 has a U-shaped cross section with a pair of side walls 17 facing each other, and the through holes 1 facing each other are provided at both ends of the side walls 17 in the length direction.
8 is provided. The shaft 19 is inserted and supported between the through holes 18, and the rollers 13a are attached to both end portions of the shaft 19 protruding from the side walls 17.
The roller 13b is assembled between the side walls 17 at the intermediate portion in the length direction of the shaft 19.

The upper rail 11 supports the upper facing wall 24 on the outer peripheral side surface of the upper portion of the roller 13b so as to cover the lower rail 10 from above, and supports the engaging portion 16 on the outer peripheral side surface of the lower portion of the roller 13a. ing.

As shown in FIG. 3, this has through-holes 18 formed in both side surfaces 17 of the lower rail 10 at three positions, namely, a front side 20, a rear side 21, and a central portion 22.
In the through hole 18, the rollers 13a assembled at both ends of the shaft 19 and the side walls 17 of the central portion 22 in the length direction are provided.
The roller 13b assembled in between is inserted. A well-known lock mechanism is attached to the upper rail 11 (not shown).

Next, the operation of this embodiment will be described.

In order to put the seat cushion 12 into and out of the seat cushion 12, an operating lever of a lock mechanism (not shown) is operated,
Unlock. The seat cushion 12 becomes movable and can be moved forward. At this time, the end portion 25 of the upper rail 11 is the roller 1 on the rear side 21.
After passing through 5, the roller 14 in the central portion 22 can be moved, and the passenger can get on and off. At this time, since the seat cushion 12 is not seated, the front side 2
The roller 13 of 0 and the roller 14 of the central portion 22 can bear the load of the seat cushion 12. This is indicated by arrow A in FIG. The normal movement range is shown by arrow B, and the end portion 25 of the seat cushion 12 is supported without exceeding the roller 15. When the seat cushion 12 is returned to the seated state, the end portion 25 of the upper rail 11 is slightly widened so that the upper rail 11 can easily return to the roller 15 on the rear side 21.

On the lower rail 10, rollers 13, 14, 1
By providing 5 on the front side 20, the rear side 21, and the central portion 22, respectively, the end portion 2 of the upper rail 11 is
5 can be moved to the roller 14 in the central part 22. This allows many sliding strokes to be obtained using a simple structure.

[0016]

When the seat cushion is moved by the roller provided between the front roller and the rear roller when the passenger gets on and off, the end portion of the seat cushion moves to the roller provided at the central portion. can do.
As a result, the sliding stroke can be made longer than that of the lower rails having the same length without changing the lengths of the upper rail and the lower rail. Further, the structure can be made simpler than the two-stage slide device. Since the load of the seated person is not applied to the seat cushion when getting on and off,
The seat cushion can be supported by the front roller and the central roller. When seated, the front cushion and the rear cushion support the seat cushion, so that the seat cushion can bear the load of the seated person and the load of the belt anchor. Therefore, many slide strokes can be obtained by using a simple structure.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat slide device according to an embodiment.

FIG. 2 is a cross-sectional view of an upper rail and a lower rail according to this embodiment.

FIG. 3 is a perspective view of an upper rail and a lower rail according to the present embodiment.

FIG. 4 is a side view showing a getting on / off state and a sitting state of the seat slide device according to the present embodiment.

[Explanation of symbols]

 10 ... Lower rail 11 ... Upper rail 12 ... Seat cushion 13, 14, 15 ... Roller 20 ... Front side 21 ... Rear side 22 ... Central part 25 ... End part

Claims (1)

[Claims] 1. A lower rail fixed to a vehicle body side, an upper rail fixed to a seat cushion side, and a roller rotatably supported by front and rear sides of the lower rail and movably supporting the upper rail. A seat slide device having a roller having a roller that is rotatably supported between the front roller and the rear roller and that supports the end portion of the upper rail when the passenger is in a boarding / alighting state. Seat slide device.