JPH05104995A - Seat slide device - Google Patents

Abstract

PURPOSE:To improve the specific dynamic property by supporting an upper rail at two points by a pair of tolling members for preventing deflection of the rail to an eccentric load on the seat side. CONSTITUTION:A load applied to an upper rail 20 from a seat cushion SC is received by a pair of rotary rollers 30A, 30B, and a tensile strength applied to the upper rail 20 is received by a slider provided between lower flanges 14, 15 and upper flanges 24, 25 facing these. Because the upper rail 20 is supported by the rotary rollers 30A, 30B at two points, when an eccentric load is applied to the upper rail 20 from the seat side, deflection of the upper rail 20 can be prevented. The specific dynamic property of the upper rail 20 can thus be improved.

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 automobile seats.

[0002]

2. Description of the Related Art A seat slide device of this type includes a pair of left and right lower rails 1 (only one of which is shown) arranged in the front-rear direction of a vehicle body as shown in FIG.
Is equipped with an upper rail 2 which is slidably mounted via a rotating roller 3 which is an example of a rolling member and which is fixed to the seat side.

The lower rail 1 is fixed to the vehicle body side and comprises a lower body 1a having a substantially U-shaped cross section, and a pair of lower flanges 1b, 1b extending outward from both upper edges of the lower body 1a. There is. Also, the upper rail 2
Is fixed to the seat-side lower surface directly or indirectly via a support member or the like, and extends downward from the upper main body 2a that covers the opening of the lower rail 1 and the side edge portion of the upper main body 2a, and the lower flange. It is formed by upper flanges 2b and 2b which engage with 1b and 1b. The upper rail 2 is supported by the rotary roller 3 incorporated in the lower rail 1, and the upper rail 2 is supported by the balls 4 interposed between the lower flanges 1b and 1b and the upper flanges 2b and 2b facing the lower flanges 1b and 1b. The upper rail 2 is configured to be able to smoothly slide by receiving a tensile force that acts. Further, the rotating roller 3 and the ball 4 are retained by the retainer 5.
It is supported by.

[0004]

However, in the above conventional seat slide device, the upper rail 2
Is supported by the rotating roller 3 at the substantially central portion in the width direction thereof, so that when an unbalanced load is applied to the upper rail 2 from the seat side, the upper rail 2 is likely to bend and its slidability may be deteriorated. was there. If the width of the rotary roller 3 is made as wide as possible in order to improve the slidability,
Since the rotary roller 3 is a cast molded product, there is a problem that the cost becomes high.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a seat slide device capable of supporting the upper rail by both ends.

[0006]

To achieve the above object, in the seat slide device of the present invention, a lower rail fixed to the vehicle body side and a lower rail which is slidably mounted via a rolling member, A seat slide device provided with an upper rail fixed to a seat side, wherein the lower rail and the upper rail include a base portion, side wall portions formed by bending both side edges of the base portion in substantially the same direction in the same direction, and both sides thereof. It is composed of a lower flange and an upper flange in which the edges of the wall are bent in the same direction, and the left and right sliding parts are formed by engaging the flanges with each other to form a pair of left and right sliding parts. Rolling members are respectively interposed between the rear surface of the moving part and the bases of the lower rails and the upper rails, and the pair of rolling members are continuously connected via a retainer. It is characterized in that.

[0007]

According to the above construction, since the upper rail is supported by the pair of rolling members by both ends, it is possible to prevent the upper rail from bending even when an unbalanced load is applied to the upper rail from the seat side. As a result, the slidability of the upper rail can be improved. Further, since the width of the rolling member can be made as narrow as possible, press molding of the rolling member becomes possible, and the cost can be significantly reduced as compared with the conventional cast molded product.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in the drawings.

1 to 4 relate to a first embodiment of the present invention, FIG. 1 is a side view of a seat slide device mounted on a vehicle seat, and FIG. 2 is a sectional view taken along the line II--II of FIG. 3 is an enlarged explanatory view of a portion A of FIG. 2, and FIG. 4 is a perspective explanatory view of a retainer having a rolling member interposed.

In the figure, E is a seat slide device,
A lower rail 10 fixed to the vehicle body side and an upper rail 20 fixed to the seat side while being slidably attached to the lower rail 10 via a rolling member 30 are provided.

According to the present invention, in particular, the lower rail 10 and the upper rail 20 are provided with bases 11 and 21.
And side wall portions 12, 13 and 22, 23 in which both side edges of the base portions 11 and 21 are bent at substantially right angles in the same direction, respectively.
And lower flanges 14 and 15 and upper flanges 24 and 25 in which end edges of the side wall portions 12, 13 and 22, 23 are bent in the same direction, respectively, and the flanges 14, 15 and 24 are formed. , 25 are engaged with each other to form a pair of left and right sliding portions 33, 34. The rear surfaces 33a, 34a of the pair of left and right sliding portions 33, 34 and the base portions 11 and 21 of the lower rail 10 and the upper rail 20 are formed. Rolling members 30A and 30B are respectively interposed between the pair of rolling members 30A and 30B and the retainer 3
It is characterized by being serially connected through 5.

Next, the structure of the first embodiment of the present invention will be described in more detail.

The vehicle seat is a seat cushion S / C.
And seat back S / B, seat cushion S /
Base plates 40 on both left and right sides of C (only one shown)
Are arranged.

The lower rails 10 are fixed to the floor 50 of the vehicle body in a left-right pair in the front-rear direction (direction of the arrow FR in FIG. 1) with a predetermined space therebetween, and the base portion 11 facing the floor 50 and this. Side walls 12 and 13 having different lengths, which are formed by bending both side edges of the base 11 to the opposite floor side at substantially right angles,
The lower flanges 14 and 15 are formed by bending the end edges of the side wall portions 12 and 13 in the same direction in an inverted U shape. The pair of left and right lower rails 10 are fixed to the floor 50 with their left and right sides being opposite to each other.

The upper rail 20 has the same sectional shape as that of the lower rail 10, and includes a base portion 21 and
Side walls 22 and 23 having different lengths, which are formed by bending both side edges of the base portion 21 to the floor side at substantially right angles, and the side wall portions 22 and 2
3 is composed of upper flanges 24 and 25 having U-shaped end edges in the same direction. The pair of left and right upper rails 20 are left and right opposite to each other and have their bases 21 fixed to the base plate 40.

Further, the lower flanges 14 and 15 and the upper flanges 24 and 25 are engaged with each other via a slider 32 made of a synthetic resin material, and a pair of left and right sliding portions 33,
34 are formed. Further, the pair of left and right sliding parts 3
Rear surfaces 33a and 34a of the lower rails 10 and 10
And between the bases 11 and 21 of the upper rail 20,
A pair of rotating rollers 30A and 30 which are examples of rolling members
B are respectively interposed between the pair of rotating rollers 3
0A and 30B are continuously supported via a retainer 35, and for example, a pair of them are provided at a predetermined interval in the front-rear direction.

The retainer 35 is formed by bending a plate member and supporting holes 35a and 35b for supporting the rotating rollers 30A and 30B.
And a pair of left and right tongues 35c, 35d for restricting the horizontal movement of the rotating rollers 30A, 30B. The movement in the front-back direction is performed by stoppers (not shown) provided on the lower rail 10 and the upper rail 20. It is regulated.

In FIG. 2, reference numeral 60 denotes a lock device, which is constructed so that the lock device 60 can be locked and unlocked by operating an operation lever 61 provided on one of the rails. , Its detailed description is omitted.

Next, the operation of the first embodiment of the present invention will be described.

The load acting on the upper rail 20 from the seat cushions SC is a pair of rotating rollers 30A, 30.
The tensile force acting on the upper rail 20 is received by the slider 32 sandwiched between the lower flanges 14 and 15 and the upper flanges 24 and 25 facing the lower flanges 14 and 15.

According to this embodiment, since the upper rail 20 is supported by the pair of rotating rollers 30A and 30B on both sides, the upper rail 20 is supported even if an unbalanced load is applied to the upper rail 20 from the seat side. The bending of 20 can be prevented. Thereby, the slidability of the upper rail 20 can be improved. Further, since the width of the rotary rollers 30A and 30B can be made as narrow as possible, press molding of the rotary rollers 30A and 30B becomes possible, and the cost can be significantly reduced as compared with the conventional cast-molded product. it can.

5 and 6 relate to the second embodiment of the present invention. FIG. 5 is a sectional explanatory view corresponding to FIG. 3, and FIG. 6 is a perspective explanatory view of the retainer shown in FIG.

In this second embodiment, the rotary roller 3
Projecting shafts 36 projecting from the left and right side surfaces are planted in the shaft center parts of 0A and 30B, and the left and right end surfaces of the projecting shaft 36 are brought into contact with the respective side wall parts 12, 13 and 22, 23 facing each other. As a result, the horizontal movement of the rotary rollers 30A and 30B is restricted. Further, the retainer 35A includes a flat plate portion 35e and projections 35f, 35 formed by bending both upper and lower side edges of the flat plate portion 35e in opposite directions.
and a through hole 35 formed in the flat plate portion 35e.
The respective protruding shafts 36 are fitted and inserted into m and 35n. This regulates the movement of the rotating rollers 30A and 30B in the front-rear direction.

In the first embodiment described above, the rotary roller 30
After inserting A and 30B, it was attached so as to cover the retainer 35, but in the second embodiment, the retainer 35A
Since the projecting shafts 36 of the rotary rollers 30A and 30B can be assembled in the through holes 35m and 35n, the assembling performance can be greatly improved.

The other structure and operation are the same as those shown in the first embodiment, and the description thereof will be omitted.

[0026]

As described above, according to the present invention, since the upper rail is supported by both ends by the pair of rolling members, even if an unbalanced load is applied to the upper rail from the seat side, the upper rail bends. Can be prevented. As a result, the slidability of the upper rail can be improved. Further, since the width of the rolling member can be made as narrow as possible, press molding of the rolling member becomes possible, and the cost can be significantly reduced as compared with the conventional cast molded product.

[Brief description of drawings]

FIG. 1 is a side view of a seat slide device mounted on a vehicle seat according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of FIG.

FIG. 3 is an enlarged explanatory view of a portion A of FIG.

4 is a perspective explanatory view of a retainer including the rolling member shown in FIG. 3. FIG.

FIG. 5 is a sectional explanatory view corresponding to FIG. 3 according to the second embodiment of the present invention.

6 is a perspective explanatory view of the retainer shown in FIG.

FIG. 7 is a cross-sectional explanatory view of a conventional seat slide device.

[Explanation of symbols]

 E Seat Slide Device S / B Seat Back S / C Seat Cushion 10 Lower Rail 11 Base 12 Side Wall 13 Side Wall 14 Lower Flange 15 Lower Flange 20 Upper Rail 21 Base 22 Side Wall 23 Side Wall 24 Upper Flange 25 Upper Flange 30 Rolling Member (rotating roller) 30A Rotating roller 30B Rotating roller 32 Slider 33 Sliding portion 34 Sliding portion 35 Retainer 35A Retainer 36 Projecting shaft

Claims (1)

[Claims] 1. A seat slide device comprising: a lower rail fixed to a vehicle body side; and a lower rail slidably attached to the lower rail via a rolling member, and an upper rail fixed to the seat side. The lower rail and the upper rail have a base portion, side wall portions formed by bending both side edges of the base portion in substantially the same direction in the same direction, and a lower flange and upper flange formed by bending end edges of the both side wall portions in the same direction. And a pair of left and right sliding portions are formed by engaging the respective flanges with each other, and a rolling member is provided between the rear surfaces of the pair of left and right sliding portions and the base portions of the lower rail and the upper rail. A seat slide device in which the pair of rolling members are connected to each other through a retainer, with each intervening.