JP2000168408A - Lower bracket fixing structure in seat track slide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts and to enhance a productivity by omitting a batch of a lower bracket fixing structure. SOLUTION: A tightening seat bore portion 17, i.e., a portion of a tightening means M for fixing a lower bracket 14 to a floor bracket 16 is constituted by a bore periphery edge 20; a bore outer periphery wall 21; a supporting wall 22; a bore inner wall 23; and a tightening bore portion 25 formed by bending a plate-like lower bracket 14. Since the supporting wall 22 is formed between the bore outer periphery wall 21 and the bore inner periphery wall 23, a press- contact area of an abutting surface 22a of the supporting wall 22 becomes larger and a pressure per a unit area becomes smaller. Therefore, even if a repeated load caused by a vibration of a vehicle is imparted to the tightening means M, a local press-contact against a periphery edge 18a of the tightening bore 18 of the floor bracket 16 can be avoided and a generation possibility of a fatigue crack on a periphery edge 18a becomes less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower bracket fixing structure for fixing a lower rail main body to a bracket of a vehicle body floor by a lower bracket in a vehicle seat track slide device.

[0002]

2. Description of the Related Art As a conventional lower bracket fixing structure,
For example, there are those shown in FIG. 4 and those shown in FIG.

[0003] In the lower bracket fixing structure shown in FIG. 4, a ring-shaped batch 30 is welded on the periphery of a fastening hole 18 formed in the floor bracket 16, and a fastening hole formed in the lower bracket 14. With the lower side of the peripheral portion of 31 being applied on this batch 30,
A bolt 26 is inserted into the fastening hole 31 of the lower bracket 14, the batch 30, and the fastening hole 18 of the floor bracket 16, and a nut 27 is screwed into the bolt 26 in the floor bracket 16 and fastened. A nut 27 is welded to the floor bracket 16.
Batch 3 on carpet C laid on floor 2 of the car body
In a state in which 0 is inserted, the carpet C is interposed between the floor bracket 16 and the lower bracket 14 with a slack.

In the lower bracket fixing structure shown in FIG. 5, a ring-shaped batch 30 is welded below a peripheral portion of a fastening hole 18 formed in the floor bracket 16 and a lower batch 14 is welded below the lower bracket 14. In a state where the bent peripheral wall portion 32 is applied on the peripheral edge portion of the fastening hole 18 of the floor bracket 16, the fastening hole 33 in the peripheral wall portion 32 of the lower bracket 14 and the fastening hole 18 of the floor bracket 16 are A nut 27 is screwed into the bolt 26 and fastened in the floor bracket 16, and the nut 27 is welded to the batch 30 in the floor bracket 16.
With the peripheral wall portion 32 of the lower bracket 14 inserted into the carpet C laid on the floor 2 of the vehicle body, the carpet C is attached to the floor bracket 16 and the lower bracket 14.
Interposed with looseness.

In the above-mentioned lower bracket fixing structure, either the batch 30 (see FIG. 4) or the peripheral wall 3
2 (see FIG. 5), the gap G between the floor bracket 16 and the lower bracket 14 is maintained, so that the carpet C is not tightened more than necessary.

[0006]

As described above, FIG.
In the lower bracket fixing structure shown in FIG. 1, the batch 30 for maintaining the gap G is required, and thus there is a problem that the number of parts increases.

As described above, in the lower bracket fixing structure shown in FIG. 5, instead of the batch 30 for maintaining the gap G, the lower bracket 14 is formed with the peripheral wall portion 32 for maintaining the gap G. are doing. However, since the lower end edge of the peripheral wall portion 32 is locally pressed against the peripheral portion of the fastening hole 18 of the floor bracket 16, a fatigue crack is generated in the peripheral portion of the fastening hole 18 by a repeated load due to the vibration of the vehicle. There was a fear. So, as mentioned above,
A batch 30 is welded below the peripheral portion of the fastening hole 18 of the floor bracket 16 for reinforcement. Therefore, since the batch 30 is required, the number of parts increases.

An object of the present invention is to further improve the lower bracket fixing structure shown in FIG. 5 to omit a batch and reduce the number of parts.

[0009]

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 body (6) fixed to the bracket (16) of the floor (2) of the vehicle body by the lower brackets (14, 15), and the lower rail body (6) fixed to the seat (4). An upper rail (5) movably supported with respect to the lower rail body (6), a plurality of lock portions (7) arranged side by side in the direction of movement of the upper rail (5) on the lower rail body (6) side; A handle (1) operably attached to a lock position and an unlock position on the upper rail (5) side.
1) and a lock member (13) which can be disengaged from the lock portions (7) on the lower rail body (6) side in accordance with the operation of the handle (11).

The fastening means (M) for fixing the lower brackets (14, 15) attached to the lower rail body (6) to the floor bracket (16) is a fastening formed on the lower brackets (14, 15). Seat holes (17),
Fastening holes (1) formed in this floor bracket (16)
8) and the fastening seat hole (17) with the fastening hole (18).
And a fastening member (19) to be fixed to the peripheral portion (18a).

In the fastening seat hole (17), a hole periphery (20) separated from a periphery (18a) of the fastening hole (18) of the floor bracket (16), and the hole periphery (20). ) To the periphery (18) of this fastening hole (18).
a) a hole outer peripheral wall portion (21) bent toward (a); and a support wall portion (21) bent inward from the hole outer peripheral wall portion (21) along the peripheral edge portion (18a) of the fastening hole (18). 22) and a hole inner peripheral wall portion (23) erected from the support wall portion (22) to the hole outer peripheral wall portion (21) with a peripheral groove portion (24) provided therebetween.
The fastening hole (2) formed inside the hole inner peripheral wall (23)
5). With the support wall (22) of the fastening seat hole (17) abutting on the peripheral edge (18a) of the fastening hole (18) of the floor bracket (16), the fastening seat hole (17) is provided. The fastening member (19) is inserted into the fastening hole portion (25) of the floor bracket and the fastening hole (18) of the floor bracket (16), and the fastening seat hole portion (17) is removed by the fastening member (19). It was sandwiched between floor brackets (16).

According to the second aspect of the present invention, the support wall portion (22) of the fastening seat hole portion (17) according to the first aspect of the present invention is provided with a peripheral portion (18a) of the fastening hole (18) of the floor bracket (16). ) Has an abutment surface (22a) that can make surface contact with the contact surface.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a seat track sliding device for a vehicle according to an embodiment of the present invention.

<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 are fixed to the, and both upper rails 5 are fitted into both lower rails 3 and are movably supported.

As shown schematically in FIG. 1B, in one lower rail 3, a plurality of lock holes 7 (lock portions) are provided below the lower rail main body 6 along the moving direction of the upper rail 5. Have been.

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.

The 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 attached to a bracket 16 provided on a panel 2a of the floor 2 (see FIGS. 2 and 3).
However, it is fixed by fastening means M described in detail later.

<Fastening means M for front lower bracket 14 shown in FIG. 2>
Cylindrical fastening seat hole 17 formed in (see * below)
And a circular fastening hole 18 formed in the floor bracket 16, and a fastening member 19 (described in detail in * below) for fixing the fastening seat hole portion 17 to a peripheral portion 18 a of the fastening hole 18. I have.

* Fastening seat hole 17 The fastening seat hole 17 includes a hole peripheral edge 20, a hole outer peripheral wall 21, a support wall 22, and a hole inner peripheral wall 23 described below. The hole peripheral portion 20 has a circular shape and is separated upward from a peripheral portion 18 a of the fastening hole 18 of the floor bracket 16. The hole outer peripheral wall 21 has a cylindrical shape,
It is bent from the hole periphery 20 toward the periphery 18 a of the fastening hole 18. The support wall portion 22 has a circular shape and is bent inward from the hole outer peripheral wall portion 21 along the peripheral edge portion 18 a of the fastening hole 18. The hole inner peripheral wall 23 has a cylindrical shape, and stands upright from the support wall 22 to the hole outer peripheral wall 21 with a peripheral groove 24 therebetween. A circular fastening hole 25 is formed inside the hole inner peripheral wall 23. The support wall portion 22 of the fastening seat hole portion 17 has a contact surface 22a provided with a flat portion so as to make a flat contact with the peripheral edge portion 18a of the fastening hole 18 of the floor bracket 16. The upper edge 23a of the hole inner peripheral wall 23 is formed by the hole peripheral edge 20 and the hole outer peripheral wall 21.
Are located at the same height as the bent corner portion between them, or slightly project above the bent corner portion.

* The fastening member 19 comprises a bolt 26 (male screw) and a nut 2
7 (female screw).

* Relationship between the fastening seat holes 17, the fastening holes 18 and the fastening members 19 On the floor 2, a carpet C is laid on the panel 2a and on each floor bracket 16. In this case, the fastening holes 18 of the floor bracket 16 are aligned with the fastening holes 28 formed in the carpet C.

Next, the lower bracket 14 is placed on the floor bracket 16, and the fastening seat holes 17 of the lower bracket 14 are also aligned with the fastening holes 18 of the floor bracket 16. In this case, the hole outer peripheral wall 21 of the fastening seat hole 17 is inserted into the fastening hole 28 of the carpet C, and the support wall 22 of the fastening seat hole 17 is applied to the peripheral edge 18 a of the fastening hole 18. U.

Further, the fastening holes 2 of the fastening seat holes 17 are provided.
A bolt 26 with a washer 29 is inserted from above into the fastening hole 18 of the floor bracket 16 and the nut 27 is screwed into the bolt 26 in the floor bracket 16.

When the fastening member 19 (bolt 26 and nut 27) is tightened together, the head 26a of the bolt 26
Is pressed against the upper end portion 23a of the inner peripheral wall portion 23 of the fastening seat hole portion 17 via the washer 29, and the nut 27 is attached to the peripheral edge portion 18 of the fastening hole 18 of the floor bracket 16.
a, and this nut 27 is
The bolt 26 and the nut 2 are welded to the lower side of
7, the fastening seat hole 17 and the floor bracket 16 are sandwiched. Therefore, the gap G between the floor bracket 16 and the lower bracket 14 is held by the hole outer peripheral wall 21, the support wall 22, and the hole inner peripheral wall 23 of the fastening seat hole 17. The carpet C is loosely interposed between the floor bracket 16 and the lower bracket 14.

<Fastening means M for rear lower bracket 15 shown in FIG. 3> Although this fastening means M is different in shape from the fastening means M for the front lower bracket 14 described above, the basic structure is completely different. The same is true.

<Characteristics of this Embodiment> This embodiment has the following characteristics (other than other technical ideas described later). As described above, the fastening seat hole 1 which is a part of the fastening means M for fixing the lower brackets 14 and 15 to the floor bracket 16.
7 comprises a hole peripheral edge portion 20, a hole outer peripheral wall portion 21, a support wall portion 22, a hole inner peripheral wall portion 23, and a fastening hole portion 25 formed by bending the plate-like lower brackets 14, 15. I have.
Therefore, the floor bracket 16 is
The contact surface 22a that can make planar contact with the peripheral portion 18a of the fastening hole 18 is easily formed. That is, in the case of the prior art shown in FIG. 5, since the width in the radial direction at the lower end edge of the peripheral wall portion 32 is determined by the thickness of the peripheral wall portion 32, the pressure contact area of the lower end edge is reduced and the per unit area is reduced. Although the pressure must increase, in the case of the present embodiment, the support wall portion 22 is formed between the hole outer peripheral wall portion 21 and the hole inner peripheral wall portion 23 that are bent each other. The pressure contact area of the contact surface 22a of the support wall 22 increases, and the pressure per unit area decreases. Therefore, even if a repeated load is applied to the fastening means M due to the vibration of the vehicle, local press-contact of the fastening hole 18 of the floor bracket 16 to the peripheral portion 18a can be avoided, and a fatigue crack may occur in the peripheral portion 18a. It is less. Therefore, the batch 30 described in the related art is not required, and the number of parts can be reduced and the productivity can be improved.

[Other Embodiments] In addition to the above-described embodiments, the present invention may be configured as shown by * below. * In the above embodiment, the cross-sectional shape of the fastening seat hole 17, particularly, the cross-sectional shape of the support wall 22 is changed. For example,
Although not shown, the hole outer peripheral wall 21 and the hole inner peripheral wall 23 are
The support wall 22 is formed in an arc shape at the intersection.

* A rivet is used as the fastening member 19 of the above embodiment instead of the bolt 26 and the nut 27. * The washer 29 of the above embodiment is omitted.

[Other technical ideas] The technical ideas (other than the claims) that can be grasped from the embodiment will be described. (A) The contact surface 22 of the support wall portion 22 according to claim 2
a has a plane portion. Therefore, floor bracket 1
The press-contact area of the fastening hole 18 with respect to the peripheral portion 18a can be increased to avoid local press-contact, reduce the number of parts, and improve productivity.

(B) In claim 1 or claim 2 or (a), the fastening member 19 is a screw (bolt 26 and nut 27). (C) In the above (b), the screw is a male screw (bolt 26) applied to the edge 23 a of the inner peripheral wall portion 23 of the fastening seat hole portion 17 or the peripheral edge portion 18 a of the fastening hole 18 of the floor bracket 16. ) And a female screw (nut 27).

(D) In the above (c), the male screw is a bolt 26 and the female screw is a nut 27.

[0035]

According to the seat track slide device according to the first and second aspects of the present invention, the support wall (22) is provided.
, The fastening holes (1) in the floor bracket (16)
8) It is possible to avoid the local press contact by increasing the press contact area with respect to the peripheral portion (18a), reduce the number of parts, and improve the productivity.

[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. 2A is a partial cross-sectional view showing the foremost part of the seat track slide device, and FIG. 2B is a partially enlarged cross-sectional view of FIG.

3A is a partial cross-sectional view showing a rearmost portion of the seat track slide device, and FIG. 3B is a partially enlarged cross-sectional view of FIG.

FIG. 4 is a partial cross-sectional view showing a foremost part in a conventional seat track slide device.

FIG. 5 is a partial cross-sectional view showing a forefront portion in a conventional seat track slide device.

[Explanation of symbols]

1 ... seat track, 2 ... floor, 3 ... lower rail, 4
... Seat, 5 ... Upper rail, 6 ... Lower rail body, 7
… Lock hole (lock part), 8… Upper rail body, 11
... handle, 13 ... lock lever (lock member), 14
... lower bracket, 15 ... lower bracket, 16 ... floor bracket, 17 ... fastening seat hole, 18 ... fastening hole, 18
a ... peripheral part, 19 ... fastening member, 20 ... hole peripheral part, 21 ...
Hole outer peripheral wall portion, 22 ... support wall portion, 22a ... contact surface, 23 ...
Hole inner peripheral wall portion, 24: peripheral groove portion, 25: fastening hole portion, M: fastening means.

Claims (2)

[Claims] 1. A lower rail body fixed to a bracket of a floor of a vehicle body by a lower bracket; an upper rail fixed to a seat and movably supported with respect to the lower rail body; A plurality of lock portions arranged side by side, a handle operably attached to a lock position and an unlock position on the upper rail side, and disengageable from each lock portion on the lower rail main body side by operating the handle. In the seat track slide device provided with the lock member described above, the fastening means for fixing the lower bracket attached to the lower rail main body to the floor bracket comprises: a fastening seat hole formed in the lower bracket; The fastening hole formed in the A fastening member fixed to the floor bracket, wherein the fastening seat hole includes a hole periphery separated from the periphery of the fastening hole of the floor bracket, and a fold from the hole periphery toward the periphery of the fastening hole. A curved hole outer peripheral wall portion, a support wall portion bent inward from the hole outer peripheral wall portion along a peripheral edge portion of the fastening hole, and a peripheral groove portion is formed from the support wall portion to the hole outer peripheral wall portion. An upright hole inner peripheral wall portion; and a fastening hole formed inside the hole inner peripheral wall portion. The support wall portion of the fastening seat hole portion abuts on a peripheral edge portion of the fastening hole of the floor bracket. In this state, the fastening member is inserted into the fastening hole of the fastening seat hole and the fastening hole of the floor bracket, and the fastening member is sandwiched between the floor bracket by the fastening member. Lower bracket fixed for seat track slide device Structure. 2. The fixing wall according to claim 1, wherein the support wall portion of the fastening seat hole portion has a contact surface capable of making surface contact with a peripheral portion of the fastening hole of the floor bracket. Lower bracket fixing structure in seat track slide device.