JPH05139194A - Turning device for automobile seat - Google Patents

Abstract

PURPOSE:To reduce weight and prevent the mounting backlash of a seat in a turning device for automobile seat capable of changing the direction of the seat frontward, backward, etc. CONSTITUTION:A ring guide rail 11 integrally having a lower hook member 11a on the upper part is provided on a support base 1 set on a vehicle floor F side, and a plurality of roller mechanism 22 rolling on the support base 1 are mounted on seat side. Each roller mechanism 2, 2 has an upper hook member 23 integrally having a slider 24 to be engaged with the lower hook member 11a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning device for a vehicle seat (seat), which is capable of changing the direction to the front and the back and is equipped with a seat belt.

[0002]

2. Description of the Related Art A sheet of this type is disclosed in JP-A-59-1452.
As disclosed in Japanese Unexamined Patent Publication No. 6, an annular guide ring is fixedly mounted on a lower pedestal fixed to the vehicle floor, and this guide ring is integrally provided on an upper pedestal fixed to the bottom center of the seat. The seat is supported rotatably in the horizontal direction by fitting the peripheral edge of the tubular leg and disposing balls, rollers, etc. between the guide ring and the peripheral edge of the leg, and to the seat belt. An engaging member that engages with each other is provided between the leg that fixes the anchor of the seat belt and the pedestal so as to resist the peeling load applied.

[0003]

Therefore, the conventional product is made of metal and has a large plate thickness, and the lower pedestal is used to rotatably support the seat. Therefore, it is heavy and cannot be reduced in weight. However, there was a problem that the direction could not be changed smoothly. In particular, in the case of seats to which seat belts are attached, seat mounting strength is required, and in order to prevent rattling of the seat, a thick metal plate must be used, which causes an increase in weight. There is. Therefore, an object of the present invention is to reduce the weight, to smoothly change the direction, and to prevent the backlash of the seat from occurring.

[0004]

A vehicle seat turning device according to the present invention for achieving the above object includes a support pedestal installed on a vehicle floor side and a seat pedestal mounted on the support pedestal. A plurality of roller mechanisms, and on the support pedestal, an annular guide rail integrally having a lower hook member facing downward is fixed to the upper part, and each roller mechanism is located inside the guide rail of the support pedestal. An upper hook member is provided along the upper hook member that is slidably engaged with the lower hook member and has a slider facing upward. It is desirable that the guide rail provided on the support pedestal is formed in an annular shape that does not extend beyond the bottom surface of the seat, that is, near the outer circumference of the bottom surface of the seat.

[0005]

The rollers of the plurality of roller mechanisms provided on the seat side roll along the guide rails of the support pedestal to change the direction of the seat. And the load applied to the seat belt is
It is transmitted to the support pedestal side via the upper hook member and the lower hook member.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a vehicle seat (S) equipped with a turning device (A) according to the present invention, in which (SC) is a seat cushion (seat), (SB) constituting the seat (S).
Is a seat back (backrest part), (AR) is an armrest, and the seat (S) is rotated by the turning device (A) in a horizontal direction to change direction from a state shown by a solid line to a state shown by an imaginary line. Installed as possible. Further, although not shown, the orientation of the sheet can be changed to a desired direction by rotating the orientation such as 45 degrees or 90 degrees. The turning device (A) is fixed to the bottom surface of the seat cushion (SC) and a plurality of roller mechanisms (2) attached to a seat slide (3) of the seat slide or the seat cushion (SC) for adjusting the front-back position of the seat (S). ) ... and a support pedestal (1) installed on the vehicle floor (F), and an anchor of a seat belt (4) is fixed to the seat frame (3).

FIG. 2 shows a state in which the roller mechanisms (2) attached to the seat frame of the seat cushion (SC) are rotatably supported on the support base (1), and the roller mechanism (2) is the seat. The upper hook member (23) integrally attached to the roller mechanism (2) is attached to the slider (2) at four locations near the outer periphery of the bottom surface of the frame (3).
4) together with the lower hook member (11a) provided upright on the outer periphery of the support pedestal (1).

FIG. 3 shows a state in which the seat cushion (SC) is rotatably supported on the support pedestal (upper), and a dish-shaped metal seat frame (3) forming the bottom of the seat cushion (SC). As shown in FIG. 2, a plurality of roller mechanisms (2) ... Are attached to the bottom surface of the roller at a position close to the outer periphery, and each roller mechanism (2) ... Has a structure as shown in FIG. That is, in each roller mechanism (2), the roller (21) is arranged inside the cylindrical holding frame (22b).
Flanges (22a) and (22a), which are rotatably supported by 5) and fixed to the seat frame (3) by welding, are provided above the holding frame (22b).
The upper hook member (23) which is bent upward on the outer surface of b)
Is extended. Then, the upper hook member (2
A synthetic resin slider (24) is fixed to the upper edge of (3) so as not to impair the rolling performance of the roller mechanism (2).

The support pedestal (1) has a cylindrical support leg (13) fixed to the vehicle floor (F) by bolts and the like, and an annular ring integrally welded horizontally to the top of the support leg (13). A mounting plate (12) and guide rails (11) screwed upright along the outer peripheral edge of the mounting plate (12),
The guide rail (11) is composed of a lower hook member (11a) formed by bending the upper end edge inward and the tip end downward. The guide rail (11) is formed to have an outer diameter slightly smaller than the outer circumference of the bottom surface of the seat frame (3) as described above.

The slider (24) fixed to the upper hook member (23) of each roller mechanism (2) ...
As shown in, the lower hook members (11) of the support pedestal (1)
a) slidably fitted in the roller (2)
1) is rotatably mounted on the mounting plate (2) of the support base (1). Thus, when changing the direction of the seat (S), if the seat cushion (SC) is rotated in the horizontal direction, the roller mechanisms (2) ... Are guided by the guide rails (11) of the support base (1). As it moves along, it can be turned to the desired orientation. Then, the peeling load by the seat belt (4) is applied to the upper hook member (23) of the roller mechanism (2), the lower hook member (11a) of the support base (1), and the guide rail (1).
It is transmitted from the support pedestal (1) to the vehicle floor (F) via 1).

FIGS. 5 and 6 show the case where a taper roller (21 ') is used as the roller of the roller mechanism (2). The taper roller (21 ') has a diameter outside the roller (21') so that the inner circumference (l) and the outer circumference (L) of the annular mounting plate (12) roll at the same number of revolutions (N). (D) is L / Nπ,
The inner diameter (d) is formed in a taper shape of 1 / Nπ. This roller (21 ') is guided in a holding frame (22'), and this holding frame (22 ') is seat frame (3).
It is fixed to a mounting bracket (26) welded to the bottom surface of the roller with locking pins (22a '), and the taper roller (21') of each roller mechanism (2 ') has its shaft center aligned with the guide rail (1).
According to 1), it is arranged toward the center of rotation of the seat cushion (SC). And the above holding frame (22 ')
The thickness (T) is set to a value (α) slightly larger than the radius of the taper roller (22 ′) so that the taper roller (22 ′) does not fall off during rolling. That is, (d-α)> T
It is desirable to be within the range of> D / 2. The illustrated upper hook member (23 ') is fastened to the mounting bracket (26) with a screw (23a'). By using the taper roller (21 ') as described above, it becomes easier to change the direction of the sheet (S).

FIGS. 7 and 8 show an example of the lock device (5) used in the device of the present invention and a modification of the mounting plate (12 '). The lock device (5) fixes the direction of the seat (S) at a fixed position, and has a locking hole (53) in a flange (12a ') extending downward from the inner edge of the mounting plate (12'). ) Is opened, and the locking claw (52) integrated with the operating lever (51) is engaged with the locking hole (53) to lock the locking hole (53) to prevent the seat (S) from rotating. , The operating lever (51) is the return spring (54)
Is urged in the lock direction by. The bearing (55) pivotally mounting the operating lever (51) is fixed to the mounting bracket (27), and the mounting bracket (27) is integrally welded to the seat frame (3 ') made of pipe. In addition, the taper roller (2 "of the roller mechanism (2")
1 ") is rotatably mounted on a mounting plate (12 ') which is inclined downward toward the outside. By using such a mounting plate (12') and a taper roller (21"), The taper roller (21 ') can be rolled more smoothly.

The above is the roller mechanism (2).
(2 ') (2 ") directly on seat frame (3) (3')
It is attached to the seat frame (3) (3 '),
In the case of a seat slide having an upper rail and a lower rail for adjusting the front and rear position of the seat (S), the roller mechanism (2) (2 ') (2 ") is attached to the lower rail of the seat slide. In FIG. 8, the same symbols as those in FIG. 3 indicate the same or the same effect members, and the description thereof will be omitted.

[0014]

According to the present invention, a large annular guide rail, for example, to the extent that the bottom portion of the seat cushion does not protrude, is fixed on the support base fixed to the vehicle floor, and the guide rail is directed downward at the upper portion of the guide rail. The lower hook member is provided integrally,
On the seat side, a plurality of roller mechanisms are rotatably provided on a support pedestal, an upper hook member is fixed to each roller mechanism, and a slider slidably engaged with the lower hook member on the upper hook member. Is provided. Therefore, the roller of each roller mechanism rolls along the guide rail, and during this rolling, the slider is always engaged with the lower hook member of the support pedestal, so that the rattling of the seat is not increased. It is suppressed small. Further, like the conventional product, since the upper pedestal with legs and the engaging member are used, the weight can be reduced and the seat can be smoothly turned.

[Brief description of drawings]

FIG. 1 is a side view of a vehicle seat equipped with a turning device according to the present invention.

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

FIG. 3 is a cross-sectional view of the turning device of the present invention.

FIG. 4 is a perspective view of a roller mechanism used in the present invention.

FIG. 5 is a sectional view when a taper roller is used in the roller mechanism of the present invention.

FIG. 6 is an explanatory view of the taper roller of FIG.

FIG. 7 is a perspective view showing a locking device used in the turning device of the present invention.

8 is a sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

 1 Support base 2, 2 ', 2 "Roller mechanism 11 Guide rail 11a Lower hook member 21, 21', 21" Roller 23, 23 'Upper hook member 24 Slider

Claims (5)

[Claims] 1. A support pedestal installed on the vehicle floor side, and a plurality of roller mechanisms mounted on the seat side and rolling on the support pedestal, wherein a lower hook member facing downward is provided on the support pedestal. An integral annular guide rail is fixed, each of the roller mechanisms is disposed along the inside of the guide rail of the support pedestal, slidably engaged with the lower hook member, and the slider is turned upward. A turning device for an automobile seat, which is provided with an upper hook member having the same. 2. The vehicle seat turning device according to claim 1, wherein the annular guide rail provided on the support pedestal is formed to have a large diameter so as not to protrude from the bottom surface of the seat. 3. The automobile according to claim 1, wherein the roller mechanism includes a taper roller and a holding frame into which the taper roller is fitted, and the upper hook member with the slider is fixed to the holding frame. Sheet turning device. 4. The roller mechanism according to claim 1, wherein the roller mechanism is provided on a seat frame or a seat slide for adjusting the front-rear position of the seat fixed to the seat frame.
The vehicle seat turning device described in the paragraph. 5. The vehicle seat turning device according to claim 1, wherein a seat belt anchor is fixed to the seat.