JP2568549Y2 - Seat slide 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 slide device interposed between a seat and a floor for sliding a seat in a vehicle.

[0002]

2. Description of the Related Art Generally, in a vehicle, a seat slide device 93 is interposed between a floor 91 and a seat 92 as shown in FIGS. The seat 92 is slid in the vehicle front-rear direction by the seat slide device 93. The seat slide device 93
Is a lower rail 931 laid on the floor 91 of the vehicle along the longitudinal direction of the vehicle, and an upper rail 93 that is slidably fitted to the lower rail 931 and fixed to the seat 92.
2 and a roller 93 interposed between both rails 931 and 932
30 and a ball 97. These rollers 93
The 30 and the ball 97 are held by a retainer 933 so as not to be separated from each other.

However, the seat slide device 9
In 3, the roller 9 is moved with the sliding of the sheet 92.
The lower rail 931 is relatively long because the 330 and the ball 97 move freely within a certain range. If the lower rail 931 is long, when the sheet 92 is slid to the slide end, the lower rail 931 protrudes from the sheet 92 and has a poor appearance. Further, the seat slide device 93 cannot withstand peeling due to a belt anchor test load particularly in the case of a two-seat rotating seat.
For this reason, it is necessary to reinforce the seat slide device 93 with a hook or the like, and this reinforcement increases the weight of the device itself.

[0004] In order to withstand the load and to shorten the lower rail, a seat slide device 8 having a structure shown in FIG. 11 has been proposed. The seat slide device 8 includes a lower rail 81 having a concave cross section, an upper rail 82 slidably fitted to the lower rail 81, and a roller 830 interposed therebetween. The roller 830 is fixedly supported on the bottom surface of the lower rail 81 via a roller case 83. Since the roller 830 is fixedly supported on the lower rail 81 side, the length of the lower rail 81 can be reduced. In addition, the load bearing performance can be improved.

In the seat slide device 8, a spacer 84 is provided between the lower rail 81 and the upper rail 82 to prevent vertical play between the two rails 81, 82. In addition, upper rail 8
A sliding plate 85 is provided between the roller case 83 and the roller case 83 to prevent lateral play between the rails 81 and 82.

[0006]

However, in the conventional seat slide apparatus, as shown in FIG. 11, the number of backlash preventing members such as the spacers 84 is increased. this is,
This is because the play is divided into a vertical direction and a horizontal direction, and the spacer 84 and the sliding plate 85 are used to separately prevent the play. In addition, the number of man-hours in assembling is increased by an amount corresponding to an increase in the number of the members for backlash prevention.

Further, in the conventional seat slide device, there is a great influence from the variation in the precision of parts. This will be described in detail with reference to FIG. Variations affected by the spacers 84 that prevent vertical play are variations in the height H1 of the lower rail 81, variations in the height H2 of the rollers 830, and variations in the flange height H3 of the upper rail 82. In addition, the variation affected by the sliding plate 85 for preventing the backlash in the lateral direction is the variation in the width W1 of the upper rail 82 and the variation in the width W2 of the roller case 83. As described above, since there are many variations, the conventional seat slide device cannot effectively suppress the play. The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a seat slide device which is excellent in assemblability and can effectively prevent backlash.

[0008]

A seat slide device according to the present invention includes a lower rail fixed to a vehicle floor side, an upper rail fixed to a seat side and fitted to slide with the lower rail, and a roller interposed between the two rails. And The lower rail has a bottom portion on which rollers are disposed, a side wall portion erected on both sides of the bottom portion, and an engagement flange portion formed by bending an upper end of the side wall portion inward into a substantially U-shaped cross section. On the other hand, the upper rail has a vertical portion, a horizontal portion extending from the lower end of the vertical portion to the left and right, on which the rollers can relatively roll, and a rising flange portion raised on both sides of the horizontal portion. The two rails are slidably fitted with each other by engaging their flange portions with each other. Further, a spacer for preventing backlash between the two rails is mounted on the engagement flange portion of the lower rail, and the spacer is provided on the lower rail.
Of the upper rail at the engaging flanges on both sides of the
The main body standing upright along the surface facing the straight
It extends from the upper end of the body and engages with the upper part of the engagement flange.
And an attachment part that fits in
The outer surface of the L-shaped vertical line portion is set to the vertical portion of the upper rail.
A first sliding contact portion that slides on the main body portion;
U-shaped cross-section extending from the lower end and formed between the main body
The end of the engaging flange portion is fitted in the groove of
It has a second sliding contact portion that slides the lower surface of the horizontal line portion against the horizontal portion of the upper rail .

The most remarkable point of the present invention is that a single type of spacer mounted on the engagement flange portion of the lower rail is less likely to cause a play between the two rails. The seat slide device of the present invention has a fitting structure of a concave lower rail and a substantially T-shaped upper rail. The lower rail has a bottom, a side wall, and an engagement flange. The upper rail has a vertical portion, a horizontal portion, and an upstanding flange portion that engages with the engagement flange portion.

The spacer extends from an upper end of the main body.
The fitted mounting part is engaged with the upper part of the engaging flange part.
And a cross section formed between the main body portion and the second sliding contact portion.
The end of the engaging flange portion is fitted into the groove of the letter "", and is mounted on the engaging flange portion of the lower rail. As a result, the only variation in the horizontal direction in which the spacer is affected is the variation in the width between the engagement flange portions of the lower rail. Therefore, the influence of variations in component accuracy is reduced. For example, the engagement mechanism of the above-mentioned attachment part to be attached to the engagement flange part
For example, an engagement tool for engaging an engagement hole provided in an engagement flange portion.
And so on. As a result, the spacer can be lowered with one touch.
It can be mounted on a rail . The spacer is made of a synthetic resin or the like so that it can be bent and deformed.
In addition, the spacer integrally forms the main body, the first sliding contact portion, and the second sliding contact portion. The first sliding contact portion has a size enough to fill a gap between the engagement flange portion of the lower rail and the vertical portion of the upper rail, and has an L-shaped cross section.
It has a shape, and the side surface of the first sliding contact portion is in sliding contact with the vertical portion. Thereby, the lateral play of the upper rail is prevented.

The second sliding contact portion has a size sufficient to fill a gap between the engagement flange portion of the lower rail and the horizontal portion of the upper rail, and the lower surface of the second sliding contact portion is formed by the horizontal sliding portion. To be in sliding contact with This prevents the upper rail from rattling in the vertical direction. In the present invention, the backlash refers to the so-called rattling behavior between both members when there is a gap between the members, and in the seat slide device, the vertical and lateral rattling behavior between both rails.

[0012]

In the present invention, when the sheet is slid, the upper rail slides smoothly with respect to the lower rail through idle rotation of the roller provided on the lower rail side. At this time, the engagement flange of the lower rail
A spacer is mounted, and the first sliding contact portion of the spacer is
Sliding contact with the vertical part of the upper rail. As a result, lateral play of the upper rail is prevented. Also, the second sliding portion of the spacer comes into sliding contact with the horizontal portion of the upper rail. This prevents the upper rail from rattling in the vertical direction.

Here, in the lateral direction, the spacer is affected only by the variation in the width between the engaging flanges of the lower rail. Further, in the vertical direction, the height of the rollers and the height of the engaging flange of the lower rail are affected. First and second sliding contact portions of the spacer
Has an L-shape, and the first sliding contact portion bends and deforms to absorb the lateral variation. In addition,
A groove having a U-shaped cross section is formed between the second slidable contact portions.
Engage the mounting part with the upper part of the engaging flange part
At the same time, fit the groove of U-shaped cross section to the end of the engaging flange.
And securely fixed to the lower rail.
You. As described above, according to the present invention, backlash in the horizontal and vertical directions is prevented by one type of spacer. In addition, the spacer is mounted on a portion where the influence of the variation is small. Therefore, it is possible to provide a seat slide device that is excellent in assemblability and that can effectively prevent backlash.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A seat slide device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the apparatus of the present embodiment is provided with a lower rail 1 fixed to the vehicle floor side, an upper rail 2 fixed to the seat side and fitted to the lower rail 1 and slid, and interposed between the two rails 1 and 2. Roller 30. The lower rail 1 has a bottom portion 11 on which the roller 30 is disposed, a side wall portion 12 erected on both sides of the bottom portion 11, and an upper end of the side wall portion 12 bent inward into a substantially U-shaped cross section. And an engagement flange portion 13.

On the other hand, the upper rail 2 has a vertical portion 21,
The horizontal portion 22 includes a horizontal portion 22 that extends from the lower end of the vertical portion 21 to the left and right and on which the roller 30 can relatively roll. Both rails 1, 2
Are slidably fitted by engaging their flange portions 13 and 23 with each other. Further, a spacer 4 for preventing play between the rails 1 and 2 is mounted on the engagement flange portion 13 of the lower rail 1. The spacer 4 has a first sliding contact portion 41 that slides on the vertical portion 21 of the upper rail 2 to prevent backlash of the upper rail 2 in the lateral direction,
And a second sliding contact portion 42 that slides on the horizontal portion 22 of the upper rail 2 to prevent backlash of the upper rail 2 in the vertical direction.

As shown in FIG. 1, the upper rail 2 is composed of upper rail members 201 and 20 welded to each other.
2,203. The vertical portion 21 and the upstanding flange portion 23 are formed by upper rail members 201 and 202. The horizontal portion 22 is formed by upper rail members 201, 202 and 203. The roller 30 is fixedly supported on the bottom 11 of the lower rail 1 via a roller case 3. As shown in FIGS. 2 to 8, the spacer 4 is made of synthetic resin in a long shape, and the first sliding contact portion 41 and the second sliding contact portion 42 are integrally formed with the main body 40. Is formed. The first sliding contact portion 41 is formed in an L-shaped cross section so that the outer surface thereof is in sliding contact with the side surface of the vertical portion 21 of the upper rail 2.

The second sliding contact portion 42 is also formed in an L-shaped cross section, and its lower surface and the horizontal portion 2 of the upper rail 2 are similarly formed.
2 is in sliding contact with the upper surface. And the second
Engaging groove 4 formed by sliding contact portion 42 and body portion 40
4, the lower end of the engagement flange 13 is fitted (FIG. 1). Further, as shown in FIGS. 2 and 3, a mounting portion 43 is provided at an intermediate portion in the longitudinal direction of the spacer 4. Then, on the lower surface of the mounting portion 43, a claw 45 is provided.
Is protruding. On the other hand, the engagement flange portion 13 of the lower rail 1 is provided with an engagement hole 15 for engaging the claw 45 as shown in FIG.

The apparatus of the present embodiment is configured as described above, and has the following operational effects. That is, when assembling the seat slide device, first, as shown in FIG.
0 is fixedly supported. Further, the spacer 4 is mounted on the engaging flange portion 13 of the lower rail 1. At this time, the claw 45 of the spacer 4 is inserted into the engagement hole 15 of the engagement flange 13.
Is engaged. Also, the lower end of the engaging flange 13 is fitted into the engaging groove 44 of the spacer 4. The lower rail 1
Sticks to the vehicle floor. On the other hand, the upper rail 2 is fixed to the seat. Then, the upper rail 2 is inserted into the lower rail 1. Thereby, the assembly is completed.

Next, the operation of the seat slide device will be described. When the seat is slid, the lower rail 1
The upper rail 2 slides smoothly with respect to the lower rail 1 through the idle rotation of the roller 30 provided on the side. At this time, the spacer 4 is mounted on the engagement flange portion 13 of the lower rail 1, and the outer surface of the first sliding contact portion 41 of the spacer 4 slides on the side surface of the vertical portion 21 of the upper rail 2. Thereby, the lateral play of the upper rail 2 is prevented. Also, the lower surface of the second sliding contact portion 42 of the spacer 4
It comes into sliding contact with the upper surface of the horizontal portion 22 of the upper rail 2. As a result, play of the upper rail 2 in the vertical direction is prevented.

Here, in the lateral direction, the spacer 4 is affected only by the variation in the width W between the engaging flange portions 13 of the lower rail 1. In the vertical direction, the variation in the height H2 of the roller 30 and the lower rail 1
Of the engagement flange portion 13 of the first embodiment. The spacer 4 absorbs these variations by bending and deforming. Since the roller 30 is fixedly supported by the lower rail 1, the lower rail 1 of the present embodiment can be shorter than the lower rail 931 of the conventional rolling roller type (see FIG. 10). In addition, the device of the present embodiment can smoothly slide without generating a so-called rumbling noise as in the above-mentioned rolling roller type. The device of this example also has high load-bearing performance.

As described above, in the apparatus of this embodiment, the backlash in the horizontal direction and the vertical direction is prevented by one kind of the spacer 4. The spacer 4 is mounted on a portion where the influence of the variation is small. Therefore, the device of this example is excellent in assemblability. Further, according to the apparatus of the present embodiment, it is possible to effectively prevent backlash.

[Brief description of the drawings]

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

FIG. 2 is a partially cut plan view of a spacer according to the embodiment.

FIG. 3 is a partially cut side view of the spacer of the embodiment.

FIG. 4 is a front view of the spacer of the embodiment.

FIG. 5 is a sectional view taken along line AA in FIG. 3;

FIG. 6 is a sectional view taken along line BB in FIG. 3;

FIG. 7 is a sectional view taken along line CC in FIG. 3;

FIG. 8 is a sectional view taken along line DD in FIG. 3;

FIG. 9 is a side view of a seat portion of a vehicle equipped with a conventional seat slide device.

FIG. 10 is a front sectional view of a conventional seat slide device.

FIG. 11 is a front sectional view of another conventional seat slide device.

[Explanation of symbols]

 1. . . Lower rail, 11. . . Bottom, 12. . . 12. side wall part; . . 1. engagement flange portion; . . Upper rail, 21. . . Vertical part, 22. . . Horizontal part, 23. . . Standing flange portion, 30. . . Laura, 4 . . Spacer, 41. . . First sliding contact portion, 42. . . The second sliding contact part,

Claims (1)

(57) [Scope of request for utility model registration] 1. A seat slide device comprising: a lower rail fixed to a vehicle floor side; an upper rail fixed to a seat side and slidingly fitted with the lower rail; and a roller interposed between the two rails. The lower rail has a bottom on which the rollers are disposed, a side wall standing on both sides of the bottom, and an engagement flange formed by bending the upper end of the side wall inward into a substantially U-shaped cross section. On the other hand, the upper rail has a vertical portion, a horizontal portion extending from the lower end of the vertical portion to the left and right, on which the rollers can relatively roll, and a rising flange portion raised on both sides of the horizontal portion. The two rails are slidably fitted by engaging their flanges with each other, and a spacer for preventing play between the two rails is attached to the engaging flange of the lower rail. Spacer , Both sides of the lower rail of the engagement flange
Along the surface of the upper rail facing the vertical section
The main body is erected, and the main body is extended from the upper end of the main body.
The mounting part engaged with the upper part of the engaging flange and the cross section
Is an L-shaped outer surface of the L-shaped vertical line protruding from the main body.
A first sliding contact portion slidingly contacting the vertical portion of the upper rail;
The cross section is L-shaped and extends from the lower end of the main body, and
The engaging flange portion is inserted into a U-shaped groove formed between
And the lower surface of the L-shaped horizontal line is
A second sliding contact portion that slides on a horizontal portion of the rail .