JP2000168409A - Guide rail mechanism in seat track slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a dropping off of a rolling pressure-receiving body (ball) and to stably carry out a movement of an upper rail without a hindrance. SOLUTION: A bottom wall pressure-receiving guide portion 34 supported by a support surface 29 of a bottom wall 18 of a lower rail and a support surface 30 of a bottom wall 20 of an upper rail is provided on a bottom wall 32 of a guide 17. A side wall pressure-receiving guide portion 35 supported by a support surface 26 of both side walls 19 of the lower rail and a support surface 27 of both side walls 21 of the upper rail is provided on both side walls 33 of the guide 17. The side wall pressure-receiving guide portion 35 has a support bore in which a ball 39 is embedded at a projecting state so as to contact with both support surfaces 26, 27. An inner periphery-edge of the support bore is continuously formed and closed so as to surround an outer periphery of the ball 39. Not only both support portions 41 engaged with the ball 39 are provided on the inner periphery edge at both sides in a moving direction of the upper rail 5 but also removal-stopping portions 42, 43 for restricting a dropping off of the ball 39 are provided at both sides in a right and left direction B perpendicular to the moving direction (front/back direction) of the upper rail 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a guide rail mechanism having a guide for movably supporting an upper rail with respect to a lower rail in a vehicle seat track slide apparatus.

[0002]

2. Description of the Related Art Conventionally, in a guide rail mechanism of a seat track slide device, a bottom wall of a guide is provided with a bottom wall pressure receiving guide portion supported on a support surface of a bottom wall of a lower rail and a support surface of a bottom wall of an upper rail. In addition, both side walls of the guide are provided with side wall pressure receiving guide portions supported on the support surfaces of the side walls of the lower rail and the support surfaces of the side walls of the upper rail. The side wall pressure receiving guide portion of this guide has a support hole that is fitted so as to protrude so that the ball can contact the support surface on the lower rail side and the support surface on the upper rail side.

[0003]

However, when a force is applied to the guide when the upper rail moves or stops relative to the lower rail, the ball may fall out of the support hole and hinder the movement of the upper rail.

An object of the present invention is to improve a support hole and prevent a ball from falling out of the support hole.

[0005]

The present invention will be described with reference to the reference numerals in the drawings (FIGS. 1 to 3) of the embodiments described later. Claim 1
In the seat track slide device according to the invention, the lower rail (3) fixed to the floor (2) of the vehicle body.
And an upper rail (5) fixed to the seat (4);
A guide (17) for movably supporting the upper rail (5) with respect to the lower rail (3) is provided. The guide rail mechanism (M) in the seat track slide device is configured as follows.

The lower rail (3) includes a bottom wall (18) and side walls (19) opposed to each other so as to sandwich the upper rail (5) on both sides of the bottom wall (18). I have. In the upper rail (5), a bottom wall (2) facing the bottom wall (18) in the lower rail (3).
0) and both side walls (21) facing the side walls (19) in the lower rail (3). The guide (17)
And a bottom wall (32) interposed between a bottom wall (18) of the lower rail (3) and a bottom wall (20) of the upper rail (5), and both side walls of the lower rail (3). (1
9) and both side walls (33) interposed between the side walls (21) of the upper rail (5).

[0007] On the bottom wall (32) of the guide (17),
Support surface (29) of bottom wall (18) of lower rail (3)
And a bottom wall pressure receiving guide (34) supported on a support surface (30) of the bottom wall (20) of the upper rail (5). The support surfaces (26) of the side walls (19) of the lower rail (3) and the support surfaces (27) of the side walls (21) of the upper rail (5) are provided on both side walls (33) of the guide (17). A supported side wall pressure receiving guide (35) is provided.

The side wall pressure receiving guide (3) of the guide (17)
In 5), the rolling pressure receiving body (39) is fitted in a state of protruding so as to be able to contact the support surface (26) on the lower rail (3) side and the support surface (27) on the upper rail (5) side. It has a support hole (38). This support hole (3
8), an inner peripheral edge (40) surrounding the outer periphery of the rolling pressure receiving body (39) is provided with a support portion (41) for rotatably locking the rolling pressure receiving body (39), and a lower rail (40). 3)
Retaining portions (42, 42) for restricting the falling of the rolling pressure receiving body (39) in the direction of the opening (28) formed between the supporting surface (26) on the side of the upper rail (5) and the supporting surface (27) on the side of the upper rail (5). 4
3) is provided.

[0009] The second aspect of the invention adds the following configuration to the first aspect of the invention. The support portions (41) of the support holes (38) are provided on both sides in the moving direction (A) of the upper rail (5). The retaining portion (4) of the support hole (38)
2, 43) are provided on both sides in the direction (B) orthogonal to the moving direction (A) of the upper rail (5).

[0010] The third aspect of the invention adds the following configuration to the second aspect of the invention. The supporting portion (41) and the retaining portion (4
Inner peripheral edge (40) of the support hole (38) having
Are continuously formed and closed so as to surround the outer periphery of the rolling pressure receiving body (39).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle seat track slide device according to an embodiment of the present invention will be described below with reference to the drawings.

<Outline of Vehicle Seat Track Slide Device> As schematically shown in FIG. 1A, a pair of lower rails 3 are fixed to a floor 2 of a vehicle body as a seat truck 1 and a seat 4 is provided. , A pair of upper rails 5 is fixed, and both upper rails 5 are both lower rails 3.
And is movably supported by a guide rail mechanism M shown in FIG.

As schematically shown in FIG. 1B, in one of the lower rails 3, a plurality of lock holes 7 (lock portions) are provided below the lower rail body 6 in a moving direction A (front-back direction) of the upper rail 5. It is juxtaposed along.

On one upper rail 5, a lock bracket 9 and a handle support 10 are attached to the upper rail main body 8. The lock bracket 9 is formed with a pair of pivot portions 9a in a forked shape. Both shaft support portions 9a of the lock bracket 9 and the handle support 1
A handle 11 is rotatably inserted into the handle 0. The handle 11 rotates between a lock position and an unlock position, and is always held at the lock position by the elastic force of the torsion coil spring 12.

A lock lever 13 (lock member) is fixed to the outer periphery of the handle 11 between the two shaft supports 9a of the lock bracket 9 and rotates together with the handle 11. In the locked state, since the lock lever 13 is engaged with the lock hole 7 of the lower rail main body 6, the upper rail main body 8 cannot be moved with respect to the lower rail main body 6.

The handle 11 is twisted by a coil spring 12
When the rotating operation is performed from the lock position to the unlock position against the elastic force of the lock lever 13, the lock lever 13 also comes to the unlock position and comes out of the lock hole 7. Accordingly, the lock is released, and the upper rail body 8 can be moved together with the seat 4 with respect to the lower rail body 6. When the handle 11 is released after the seat 4 is positioned, the handle 11 is rotated to the lock position by the elastic force of the torsion coil spring 12, and the lock lever 13 is also in the lock position to lock the lock hole 7.
Will be involved.

In the lower rail 3 shown in FIG.
A front lower bracket 14 and a rear lower bracket 15 for fixing the lower rail body 6 to the floor 2 are attached to lower sides of both front and rear ends of the lower rail body 6, respectively.

The front and rear lower brackets 14 and 15 attached to the lower rail body 6 are fixed to a bracket 16 provided on the floor 2. <Guide Rail Mechanism M shown in FIG. 2> The guide rail mechanism M includes a guide 17 (to be described later in detail) that movably supports the main body 8 of the upper rail 5 with respect to the main body 6 of the lower rail 3.

In the lower rail body 6, the bottom wall 1
And right and left side walls 1 opposed to each other so as to sandwich the upper rail body 8 on both left and right sides of the bottom wall 18 (both sides in the left and right direction B perpendicular to the moving direction A of the upper rail 5).
9 is provided. The upper rail body 8 includes a bottom wall 20 facing the bottom wall 18 in the lower rail body 6 and left and right side walls 21 facing the left and right side walls 19 in the lower rail body 6.

The upper portion of the left and right side walls 19 of the lower rail body 6 has an upper wall 24 curved toward the upper rail body 8 at an upper end corner 23 of an outer wall 22, and an upper rail body 24 extending from the upper wall 24. 8 has an end wall portion 25 curved toward the bottom wall 20, and an arc-shaped support surface 26 is formed inside the upper end corner portion 23. The left and right side walls 21 of the upper rail body 8 are inclined obliquely upward and inward from the bottom wall 20 and have a planar support surface 27 facing the support surface 26 on the lower rail body 6 side. An opening 28 is formed between a support surface 26 on the lower rail body 6 side and a support surface 27 on the upper rail body 8 side. The open portion 28 is opened between the outer wall portion 22 of the side wall 19 of the lower rail main body 6 and the side wall 21 of the upper rail main body 8 in both the vertical direction and the moving direction A of the upper rail main body 8. Upper space 28 between wall 23 and the upper end of side wall 21 of upper rail body 8.
a and the side wall 19 of the lower rail body 6.
Has a lower space 28b between the outer wall portion 22 and the lower end of the side wall 21 of the upper rail body 8. The center line 26a of the arc-shaped support surface 26 on the lower rail body 6 side is
8, the flat support surface 27 faces upward so that the diametric surface passing through the center line 26a is substantially perpendicular to the flat support surface 27 on the upper rail body 8 side. It is inclined.

The bottom wall 18 of the lower rail main body 6 and the bottom wall 20 of the upper rail main body 8 are opposed to each other.
9, 30 are formed. <Guide 17 shown in FIGS. 2 and 3> The main body 31 of the guide 17 includes a bottom wall 32 interposed between the bottom wall 18 of the lower rail body 6 and the bottom wall 20 of the upper rail body 8.
And left and right side walls 33 interposed between the left and right side walls 19 of the lower rail body 6 and the left and right side walls 21 of the upper rail body 8.

The bottom wall 32 of the guide body 31 has a bottom wall pressure guide 34 (supported by the support surface 29 of the bottom wall 18 of the lower rail body 6 and the support surface 30 of the bottom wall 20 of the upper rail body 8). (Detailed by * below).
The left and right side walls 33 of the guide main body 31 have side wall pressure receiving guide portions 35 (described below) supported by the support surfaces 26 of the left and right side walls 19 of the lower rail body 6 and the support surfaces 27 of the left and right side walls 21 of the upper rail body 8. *).

* Bottom wall pressure receiving guide 34 An opening 36 is formed in the bottom wall 32 of the guide body 31, and a roller 37 is fitted into the opening 36. These days 37
Are projected in the up-down direction of the opening 36, the support surface 29 of the bottom wall 18 of the lower rail body 6 and the bottom wall 2 of the upper rail body 8.
The upper rail 5 rotates in the moving direction A of the upper rail 5.

* The side wall pressure receiving guide portion 35 The support hole 3
8 are formed. A ball 39 (rolling pressure receiving body) is fitted into the support hole 38. The inner peripheral edge 40 of the support hole 38 is continuously formed so as to surround the outer periphery of the sphere 39 and is closed. The ball 39 protrudes from the support hole 38 and is supported in contact with the arc-shaped support surface 26 on the lower rail main body 6 side and the planar support surface 27 on the upper rail main body 8 side. The center of the sphere 39 is located substantially on the center line 26 a of the arc-shaped support surface 26.

On the inner peripheral edge 40 of the support hole 38, a support portion 41 for locking the ball 39 on both front and rear sides in the moving direction A of the upper rail 5 is provided. The front and rear support portions 41 are
Center line 26 of the arc-shaped support surface 26 passing through the center of the sphere 39
A is curved around the center line 26a between the center line 26a and the arc-shaped support surface 26. The upper ends of the front and rear support portions 41 are located in an upper space 28a of the opening 28 above a horizontal plane passing through the center line 26a and inside a vertical plane passing through the center line 26a. Front and back support 4
The lower end of 1 is located in the lower space 28b of the opening 28 below a horizontal plane passing through the center line 26a and inside a vertical plane passing through the center line 26a.
The ball 39 enters the front and rear support portions 41 on both front and rear sides thereof, and is supported rotatably in all directions including the front-rear direction (moving direction A) and the left-right direction B.

On the inner peripheral edge 40, upper retaining portions 42 (connecting portions) are formed on both sides in the left-right direction B perpendicular to the moving direction A of the upper rail 5 and continuous with the upper ends of the front and rear support portions 41. And the front and rear support portions 41
A lower retaining portion 43 (connecting portion) is formed continuously with the lower end portion of the upper portion. The upper retaining portion 42 is located in the upper space 28a of the opening 28, and the lower retaining portion 43 is located in the lower space 28b of the opening 28. The ball 39 is supported in the vicinity of the upper retaining portion 42 and the lower retaining portion 43 and can be brought into contact with the retaining portions 42, 43. The front and rear support portions 41 also serve as retaining portions for the ball 39.

<Features of the present embodiment> The present embodiment has the following features (other than other technical ideas described later). * At the inner peripheral edge 40 of the support hole 38 of the guide 17 surrounding the outer periphery of the ball 39, not only is provided a support portion 41 for rotatably locking the ball 39, but also a stopper for restricting the ball 39 from falling off. Parts 42 and 43 are provided. Therefore, in addition to preventing the ball 39 from falling off to the open portion 28 by the support portion 41, the retaining portions 42 and 43 also prevent the ball 39 from separating from the support portion 41 and falling off to the open portion 28. Can be prevented. Therefore, the lower rail 3
In contrast, when the upper rail 5 is moved, it can be supported in a stable state without any trouble.

* The support portions 41 of the support holes 38 are provided on both sides in the moving direction A of the upper rail 5. for that reason,
The force generated when the upper rail 5 moves can be reliably received by the front and rear support portions 41. Therefore, when the upper rail 5 is moved with respect to the lower rail 3, it can be supported in a stable state without any trouble.

* The retaining portions 42, 43 of the support hole 38 are provided on both sides in the left-right direction B orthogonal to the moving direction A (front-back direction) of the upper rail 5. Therefore, in addition to preventing the ball 39 from dropping in the front-rear direction (moving direction A) of the opening 28 by the front and rear support portions 41, the ball is also prevented by the upper retaining portion 42 and the lower retaining portion 43. 39 can be prevented from being separated from the front and rear support portions 41 and falling in the directions of the upper and lower spaces 28a and 28b of the open portion 28. Therefore, when the upper rail 5 is moved with respect to the lower rail 3, it can be supported in a stable state without any trouble.

* The inner peripheral edge 40 of the support hole 38 is continuously formed so as to surround the outer periphery of the ball 39 and is closed. Therefore, it is possible to prevent the front and rear support portions 41 of the support hole 38 from expanding in the movement direction A (the front-back direction) of the upper rail 5. Therefore, it is possible to more reliably prevent the ball 39 from falling off.

[Other Embodiments] In addition to the above-described embodiments, the present invention may be configured as indicated by * below. * Upper retaining portion 42 and lower retaining portion 43 of support hole 38
Has a function as a connecting portion that prevents the front and rear support portions 41 from spreading, so that these retaining portions 42 and 43 may be separated from the ball 39. However, these retaining portions 42, 4
3 is desirably located near the ball 39 from the standstill function.

In the bottom wall pressure receiving guide 34 of the guide 17, the roller 37 as a rolling pressure receiving member is changed to a ball. [Other technical ideas] The technical ideas (other than the claims) that can be grasped from the embodiment will be described.

(A) In claim 1, 2 or 3, the rolling pressure receiving member (ball 39) is
It is supported near 43 so as to be able to abut against the retaining portions 42 and 43. Therefore, it is possible to more reliably prevent the ball 39 from falling off.

(B) In claim 1 or claim 2 or claim 3 or (a), the rolling pressure receiving member is a ball 39
It is. Therefore, the support between the lower rail 3, the guide 17, and the upper rail 5 can be performed with a simple structure.

(C) In claim 1 or claim 2 or claim 3 or (a) or (b), the bottom wall pressure receiving guide portion 34 of the guide 17 is provided on the support surface 29 of the bottom wall 18 of the lower rail 3. And a rolling pressure receiving body (roller 37) supported on the support surface 30 of the bottom wall 20 of the upper rail 5. Therefore, the movement of the upper rail 5 with respect to the lower rail 3 can be performed smoothly without any trouble.

[0036]

According to the guide rail mechanism (M) of the seat track slide device according to the first aspect of the present invention, the rolling bearing (3) is provided in the support hole (38) of the guide (17).
9) can be prevented, and the upper rail (5) can be stably moved with no hindrance to the lower rail (3).

According to the second aspect of the invention, in addition to the effect of the first aspect, the force generated when the upper rail (5) is moved can be reliably received by both the support portions (41) of the support hole (38). As well as both retaining portions (4) of the support hole (38).
2, 43), the rolling pressure receiving member (39) is connected to both support portions (4, 43).
It can be prevented from falling off in the direction of the opening (28) away from 1).

According to the invention of claim 3, in addition to the effect of the invention of claim 2, both the support portions (41) of the support hole (38) are prevented from spreading in the moving direction (A) of the upper rail (5). However, the falling off of the rolling pressure receiving body (39) can be more reliably prevented.

[Brief description of the drawings]

FIG. 1A is a schematic side view showing a state where a seat is installed on a floor via a seat track, and FIG.
FIG. 3 is an assembled perspective view showing the seat track slide device.

FIG. 2 is a partial cross-sectional view showing a guide rail mechanism in the seat track slide device of FIG. 1 (b).

FIG. 3A is a perspective view showing a guide main body of a guide rail mechanism, and FIG. 3B is a side view showing the same guide.

[Explanation of symbols]

1 ... seat track, 2 ... floor, 3 ... lower rail, 4
... Sheet, 5 ... Upper rail, 17 ... Guide, 18 ... Bottom wall, 19 ... Side wall, 20 ... Bottom wall, 21 ... Side wall, 26 ... Support surface, 27 ... Support surface, 28 ... Open part, 29 ... Support surface, 30
... Supporting surface, 32 ... Bottom wall, 33 ... Side wall, 34 ... Bottom wall pressure receiving guide, 35 ... Side wall pressure receiving guide, 38 ... Support hole, 39 ... Sphere (rolling pressure receiving body), 40 ... Inner peripheral edge, 41 ... Support, 42 ...
Retaining portion, 43: retaining portion, A: upper rail moving direction, M
... guide rail mechanism.

Claims (3)

[Claims] 1. A seat track slide device comprising: a lower rail fixed to a floor of a vehicle body; an upper rail fixed to a seat; and a guide movably supporting the upper rail with respect to the lower rail. Comprises a bottom wall, and both side walls facing each other so as to sandwich the upper rail on both sides of the bottom wall. In the upper rail, a bottom wall facing the bottom wall in the lower rail; In the guide, in the guide, a bottom wall interposed between the bottom wall of the lower rail and the bottom wall of the upper rail, and both side walls of the lower rail and the upper rail And a side wall interposed between the lower rail and the lower rail, and a support surface of the lower rail bottom wall and a support of the upper rail bottom wall are provided on the bottom wall of the guide. A bottom wall pressure receiving guide portion supported on the surface is provided, and both side walls of the guide are provided with side wall pressure receiving guide portions supported on the support surfaces of both side walls of the lower rail and the support surfaces of both side walls of the upper rail, The side wall pressure receiving guide portion of the guide has a support hole which is fitted in a state where the rolling pressure receiving member projects so as to be able to come into contact with the support surface on the lower rail side and the support surface on the upper rail side. The inner peripheral edge surrounding the outer periphery of the rolling pressure receiving body is provided with a supporting portion for rotatably locking the rolling pressure receiving body, and an open portion formed between the supporting surface on the lower rail side and the supporting surface on the upper rail side. A guide rail mechanism in a seat track slide device, comprising a retaining portion for restricting the falling of the rolling pressure receiving body in the direction of. 2. The support portion of the support hole is provided on both sides in the moving direction of the upper rail, and the retaining portions of the support hole are provided on both sides in a direction orthogonal to the moving direction of the upper rail. A guide rail mechanism in the seat track slide device according to claim 1. 3. An inner peripheral edge of a support hole having a support portion and a retaining portion is continuously formed so as to surround an outer periphery of a rolling pressure receiving member, and is closed. Guide rail mechanism in seat track slide device.