JP2589783Y2 - Slide rails for vehicle seats - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide rail for adjusting the front / rear position of a vehicle seat, and more particularly to a slide rail having a seat belt anchor attached to a movable upper rail.

[0002]

2. Description of the Related Art An example of a conventional slide rail for fixing a seat belt anchor is shown in FIG. The slide rail includes a lower rail (101) fixed to the vehicle floor side, and an upper rail (102) slidably fitted to the lower rail (101) to fix a seat and attach a seat belt anchor (not shown). Is composed of
This lower rail (101) and upper rail (102)
Is formed to have a predetermined strength. That is, the lower rail (101) is bent in a substantially U-shape, and its opening edges are bent so as to face inward respectively.
(111) is formed, and a lock hole (112) is opened in the lower part. The upper rail (102) is connected to the sliding part (121) (1) fitted in the lower rail (101).
21) and upright mounting portions (122) (123) integrally formed with the sliding portions (121) (121).
These mounting portions (122) (223) are welded together,
A fixing plate (131) having an engagement recess (131A) on one side is welded to the bottom surface of each of the sliding portions (121) (121). In addition, a sheet (not shown) is fixed above the one attachment portion (123). In the figure (10
8) indicates a roller, and (109) and (109) indicate rolls.

The above-mentioned slide rail is provided with a lock device for locking the upper rail (123) at a predetermined position. This lock device has the following structure. That is, the bracket (104) is welded to the above one upper rail (123), and this bracket (10) is welded.
An operation shaft (171) of an operation lever integrally having a stopper (141) at the lower end of 4) is rotatably mounted on the operation shaft. Therefore, the stopper (141) is connected to the lower rail (1).
01) through the lock hole (112) to the fixing plate (13).
The upper rail (123) is locked at an arbitrary position by being engaged in the engaging recess (131A) of (1).

[0004]

[Problem to be solved by the present invention]
01), the upper rail (102) is formed of a steel material so as not to be deformed by a load applied to the seat belt. Therefore, there is a problem that the weight of the slide rail cannot be reduced. The locking device is a stopper (141).
Has a structure in which it is engaged laterally with a lock hole (112) provided in the lower side surface of the lower rail (101), so that a space is required in the lateral direction of the slide rail, and a carpet or the like laid on the vehicle floor has a stopper (141). ) May be bitten. Accordingly, an object of the present invention is to reduce the weight of the slide rail in the slide rail to which the anchor of the seat belt is attached, and to prevent the locking device from restricting the space in the lateral direction of the slide rail.

[0005]

A slide rail according to the present invention for achieving the above object has a substantially U-shaped cross section, and is bent so that the opening edges thereof face each other. A steel lower rail having a number of lock holes in one of the locking portions, an aluminum upper rail slidably fitted in the lower rail, and a sheet integrally fastened to an upper portion of the upper rail. A steel base plate for fixing the cushion to the upper part, a steel stopper which is attached to the base plate so as to be movable in the vertical direction and engages with the lock hole of the lower rail, and a pinion provided integrally with the stopper and provided on the base plate And a control lever for integrally attaching the pinion to the shaft. The above upper rail is preferably formed by extruding an aluminum alloy.

[0006]

The upper rail made of aluminum is reinforced by a base plate made of steel, the constituent members of the lock device are located above the lower rail, and the stopper does not protrude laterally of the lower rail.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. (1) in the figure is a steel lower rail,
(2) is an upper rail made of an aluminum alloy, (3) is a steel base plate for fixing a seat cushion (not shown) on an upper part, and (4) is a base plate (3) which is attached to the base plate (3) and can be moved vertically. ) Is a steel stopper, (5) is a synthetic resin rack integrally fixed to the stopper (4), (6) is a synthetic resin pinion that meshes with the rack (5), and (7) is a base plate (3). The operating lever integrated with the operating shaft (71) rotatably supported by the bearings (33) and (33) provided in the above is shown, respectively.

As shown in FIG. 1, the lower rail (1) has a vehicle floor (F) at both ends in the length direction via legs (9).
As shown in FIG. 2, it is bent into a substantially U-shaped cross section, and the opening edges, which are both free ends thereof, are bent and formed by a press so as to further face each other. (11) is provided. As shown in FIG. 3, a number of lock holes (12) are formed at one locking portion (11) at intervals.

As shown in FIG. 2, the upper rail (2) is formed by extruding an aluminum alloy into a complicated sectional shape to prevent escape from the lower rail (1). That is,
The upper rail (2) is slidably fitted in the lower rail (1), and protrudes upwardly from the lower rail (1) integrally with the sliding part (21). And an upright portion (22) for fastening the base plate (3). The sliding portion (21) is formed in a substantially inverted H shape, and a contact portion ( 21A) and (21B) are in line contact.
As shown in FIG. 3, the stopper (4) is provided on a sliding portion (21) corresponding to a portion of the upper rail (2) having a lock hole (12) of the lower rail (1).
Notches (23) with which the engaging claws (41) are engaged are provided.

The upright portion (2) of the upper rail (2)
The base plate (3) is integrally fastened to 2),
The upper rail (2) is reinforced. The stopper (4) is attached to the base plate (3) on the side opposite to the upper rail (2) so as to be slidable in the vertical direction. That is, the stopper (4) is formed into a plate shape so as to be joined to the base plate (3), and guide holes (42) (4) formed of vertically long holes are formed on both upper portions thereof.
2) is opened, and pins (43) and (43) with enlarged heads fixed to the base plate (3) are inserted into the guide holes (42) and (42). Further, a plurality of engaging claws (41) which engage with lock holes (12) provided in the lower rail (1) are provided at a lower portion of the stopper (4) so as to protrude downward, and are provided on the base plate (3). Bending part (3
Are inserted through the through holes (32) provided in 1).

A rack (5) is integrally provided at the upper center of the stopper (4). The rack (5) is engaged with a pinion (6), and the rack (5) is rotated by the rotation of the pinion (6). The stopper (4) moves up and down through the intermediary. Since the pinion (6) is fixed to the operation shaft (71), the pinion (6) is rotated by rotating the operation lever (7).

As shown in FIG. 1, the stopper (4) is always urged in the direction of the lock hole (12) by a spring (72) provided on the operating shaft (71). (8) in the figure
Is a synthetic resin roller for improving the slidability of the upper rail (2). The upper right and left sides of the roller (8) are engaged with the sliding portion (21) of the upper rail (2) in a holding manner. I have. (81) is a stopper piece for restricting the movement of the roller (8).

In the above slide rail, as shown in FIGS. 1 and 2, a plurality of engaging claws (41) of a stopper (4) are provided.
By engaging the notch (23) in the upper rail (2) from the lock hole (12) of the lower rail (1),
In the locked state, the movement of the base plate (3) integral with the upper rail (2) in the front-rear direction is restricted.

When the operating lever (7) in FIG. 1 is rotated in the direction of the arrow against the resilience of the spring (72), the operating shaft (71) is rotated to move the pinion (6) in the same direction. Rotate. Since the rack (5) meshing with the pinion (6) moves upward by the rotation of the pinion (6), the stopper (4) integral with the rack (5) also moves upward to engage the stopper (4). As shown in FIG. 3, the dowels (41) are notches (23) of the upper rail (2).
... escape from the lock hole (12) of the lower rail (1),
The locked state is released, and the upper rail (2),
The base plate (3) is movable in the front-rear direction.

After the front and rear positions of the seat cushion are adjusted to a desired position, the operating shaft (71) and the pinion (6) are rotated by the elastic force of the spring (72), and the stopper (4) is moved downward. Then, the engaging claws (41) are engaged with the lock holes (12) at appropriate positions of the lower rail (1) and the cutouts (23) of the upper rail (2) to be in a locked state.

[0016]

According to the present invention, since the upper rail is formed of aluminum, the weight can be reduced as compared with the conventional steel. In addition, the upper rail can be extruded into a complicated cross-sectional shape so as to have a predetermined strength.
Since the upper part is joined to a steel base plate and the lower part is fitted in a steel lower rail, there is no fear of deformation even if an aluminum material is used.

Further, as described above, since the upper rail can be extruded into a complicated cross-sectional shape and the lower rail having a simple cross-sectional shape can be press-formed with a steel material, the formability of the slide rail is improved. In addition, since the upper rail, which is difficult to extrude with a deformed and thin-walled steel, is formed of aluminum, and the lower rail, stopper, and base plate, which require high strength, are formed of steel, the structure becomes reasonable as a slide rail.

In addition, since the stopper is located above the lower rail and moves up and down to be in a locked state or an unlocked state, the stopper does not protrude laterally of the lower rail, and the vehicle floor on which the lower rail is installed is provided. A carpet or the like laid on the slide rail does not bite into the stopper, and there is no need to provide a space for the stopper to move in the lateral direction of the slide rail.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a main part of a slide rail according to the present invention.

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

FIG. 3 is a partially cutaway vertical front view of the slide rail of the present invention in an unlocked state.

FIG. 4 is a sectional view of a conventional slide rail.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower rail 2 Upper rail 3 Base plate 4 Stopper 5 Rack 6 Pinion 7 Operation lever

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower rail made of steel, having a substantially U-shaped cross section, bent at its opening edges so as to face each other to provide a locking portion, and having a number of locking holes in one of the locking portions. An aluminum upper rail slidably fitted in the lower rail, a steel base plate integrally fastened to the upper part of the upper rail and fixing the seat cushion to the upper part, and mounted on this base plate so as to be movable in the vertical direction. A vehicle seat comprising: a steel stopper engaged with the lock hole of the lower rail; a rack provided integrally with the stopper and engaged with a pinion provided on the base plate; and an operation lever integrally mounted on the pinion. Slide rail.