JPH1148837A - Seat rotating device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a device by sticking an upper engaging part which extends downward along a standing part of a rotational plate to the lower surface of a seat belt fixing part of the rotational plate so as to form closed cross section with the standing part of the rotational plate, and by sticking a lower engaging part which engages with the upper engaging part when a seat is forward or backward. SOLUTION: When seat belt load is impressed onto a rotational plate 2, the rotational plate 2 is prevented from separating from a fixing plate 1 because a rear upper engaging member 62 engages with a rear lower engaging member 63. At this time, seat belt load impressing onto the rotational plate 2 transfers to the fixing plate 1 through a standing part 28 and each engaging member 62, 63, but the standing part 28 dose not deform because the standing part 28 and the rear upper-engaging member 62 form a closed cross section. The front side of the rotational plate 2 dose not require reinforcement because a standing part 27 and a front upper engaging member 61 form a closed cross section like on the rear side. Because the front upper engaging member 61 can be eliminated, a device can be miniaturized even when it is applied to a large seat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular seat rotating apparatus capable of turning a seat from front to rear.

[0002]

2. Description of the Related Art A conventional seat rotation device for a vehicle is disclosed in Japanese Patent Application Laid-Open No. 59-14526.
In this method, a rotating plate on which a seat is fixed is fixed on a fixed plate fixed to the floor, and a seat belt is fixed to the rotating plate at a side end of the seat. A hook is provided and a lower hook is provided on the upper surface of the fixed plate to prevent the upper plate and the lower hook from engaging with each other when the seat is facing forward and separating from the fixed plate when the seat belt load is applied to the rotary plate. This is to prevent it.

[0003]

However, in the above structure,
Since the upper hook and the lower hook are provided on the rotating plate and the fixed plate below the end on the side of the sheet, in the case of a large sheet, the fixed plate and the rotating plate must be enlarged in accordance with the sheet, and the weight is heavy. And there is a problem that the space at the foot of the occupant of the rear seat becomes narrow. Therefore, an object of the present invention is to provide a vehicle seat rotation device that can be downsized even when applied to a large seat.

[0004]

In the present invention, a rotating plate 2 is rotatably supported on a fixed plate 1 fixed to a floor, and the rotating plate 2 has an upright portion 27 on its outer peripheral edge which rises obliquely upward. , 28 are provided, and the seat and the seat belt 5 are fixed to the upright portion 28. In the vehicular seat rotating device, on the lower surface of the seat belt fixing portion 282 of the rotatable plate 2, along the upright portion 28 of the rotary plate 2. The upper engaging member 62 extending downward is fixed to the upright portion 28 of the rotating plate 2 so as to form a closed cross section, and the lower engaging member engages with the upper engaging member 62 when the sheet is facing forward and backward. Engaging member 6
3 is fixed to the upper surface of the fixing plate 1.

According to the above configuration, the upper engaging member 62 extends downward along the upright portion 28 and engages with the lower engaging member 63 at a position closer to the center than the seat belt fixing portion 282 of the upright portion 28. The seat rotating device can be made smaller.
In addition, the seat belt load applied to the rotating plate 2 is
And, it is transmitted to the fixing plate 1 through the engaging members 62 and 63, but since the closed section is formed by the upright portion 28 and the upper engaging member 62, the upright portion 28 is not deformed.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described with reference to FIGS. As shown in FIG. 1, a rotating plate 2 fixed to a seat is rotatably supported on a fixed plate 1 fixed to the floor via a seat track T. As shown in FIG. 2, a first annular portion 12 that is one step higher than the outer peripheral portion 11 is formed at the center of the fixing plate 1. At the center of the first annular portion 12, a second annular portion 13 which is higher by one step is formed, and at the center of the first annular portion 13, a circular opening 14 is formed. An annular groove 15 is formed on the upper surface of the first annular portion 12.

An annular portion 22 is formed at the center of the rotary plate 2 at a level lower than the outer peripheral portion 21, and a circular opening 24 is formed at the center of the annular portion 22. A first annular groove 25 facing the annular groove 15 of the fixed plate 1 is formed on the lower surface of the annular portion 22, and a second annular groove 25 is formed on the upper surface of the annular portion 22 inside the first annular groove 25.
An annular groove 26 is formed. Between the annular groove 15 of the fixed plate 1 and the first annular groove 25 of the rotating plate 2, a plurality of balls 3 held at equal intervals by a retainer (not shown) are arranged. It rotates so as to be separated from the fixed plate 1.

[0008] The fixed plate 1 and the rotating plate 2 are connected to the opening 24 of the rotating plate 2.
The second annular portion 13 of the fixing plate 1 is fitted so as to slightly protrude therefrom.
Holding plate 4 for holding the plate so as not to be detached from fixed plate 1
Has been fixed. A circular opening 44 having the same diameter as the opening 14 of the fixed plate 1 is formed at the center of the holding plate 4. Further, an annular groove 46 facing the second annular groove 26 of the rotating plate 2 is formed on the lower surface of the holding plate 4. Second annular groove 2 of rotating plate 2
A plurality of balls 3 held at equal intervals by a holder (not shown) are also disposed between the holding plate 4 and the annular groove 46 of the holding plate 4. To rotate. A locking device (not shown) is provided between the rotating plate 2 and the fixed plate 1 so that the rotating plate 2 can be locked with respect to the fixed plate 1 when the seat is facing forward and backward.

As shown in FIG. 1, the outer peripheral edge 4
Upright portions 27 and 28 that rise obliquely upward are provided at the corners, and sheet fixing portions 271 and 281 are formed at the upper ends of the four upright portions 27 and 28. A seat belt fixing portion 282 to which the seat belt 5 is fixed is formed at the upper end of the two upright portions 28 located on the rear side of the four upright portions 27 and 28. The seat belt 5 is of a winding type in the illustrated example.

A front upper engaging member 61 hanging downward is fixed to the lower ends of the two standing portions 27 located on the front side. Also, on the lower surfaces of the two upright portions 28 located on the rear side,
A rear upper engagement member 62 (shown only on the left side) extending downward from the upper end of the upright portion 28 along the upright portion 28 is fixed. At the lower ends of the upper engaging members 61 and 62, engaging portions 611 and 622 having a U-shaped cross section are formed. As shown in FIG. 2, the upper end of the rear upper engaging member 62 is connected to the seat fixing portion 281 (FIG. 1) of the upright portion 28 and the seat belt fixing portion 2.
The seat and the seat belt 5 are bolted to the bolt 7 penetrating both the upright portion 28 and the upper engagement member 62.
Has been fixed by. In addition, the upright portion 28 and the rear upper engaging member 62 are respectively provided with bulging portions 283 and 283 in the longitudinal direction.
621 are formed. Then, as shown in FIG. 3, the upright portion 28 and the rear upper engaging member 62 are
1 are welded on both sides in the width direction to form a closed section.

On the other hand, as shown in FIG. 1, lower engaging members 63 are provided upright at the four corners of the upper surface of the outer periphery of the fixed plate 1, and at the upper end thereof as shown in FIG. Reverse section U
A letter-shaped engaging portion 631 is formed. When the sheet is facing forward and backward, the engaging portions 611 and 622 of the upper engaging members 61 and 62 and the engaging portion 631 of the lower engaging member 63.
Are engaged in the vertical direction.

According to the above configuration, when the seat belt load is applied to the rotating plate 2, the rear upper engaging member 62 and the lower engaging member 63 are engaged with each other.
Is prevented from peeling off. At this time, the seat belt load applied to the rotating plate 2 is transmitted to the fixed plate 1 through the upright portion 28 and the respective engaging members 62 and 63, but is closed by the upright portion 28 and the rear upper engaging member 62. Since the cross section is formed, the upright portion 28 is not deformed.

Next, a second embodiment will be described with reference to FIGS. Components having the same functions as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. In the first embodiment, the seat belt 5 is fixed by the bolts 7 penetrating both the upright portion 28 of the rotating plate 2 and the rear upper engaging member 62, but in the second embodiment, FIGS. As shown in FIG. 7, the structure is such that only the rear upper engaging member 62 in the closed cross section is fixed with the bolt 7.
With this structure, the same operation and effect as those of the first embodiment can be obtained.

In the first and second embodiments, the seat belt 5 is provided with two upright portions 2 located on the rear side of the rotating plate 2.
8, most of the seat belt load is transmitted to the fixed plate 1 through the upright portion 28 and the respective engaging members 62 and 63 on the rear side of the rotating plate 2. Therefore, on the front side of the rotating plate 2, it is not necessary to form a closed cross section by the upright portion 27 and the front upper engaging member 61 as in the rear side, and to reinforce the same. Further, the front upper engaging member 61 can be omitted.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a sheet rotating device according to a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a diagram illustrating a seat rotation device according to a second embodiment.

FIG. 5 is a sectional view taken along line CC of FIG. 4;

FIG. 6 is a sectional view taken along line DD of FIG. 4;

FIG. 7 is a sectional view taken along the line EE of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Fixed plate 2 ... Rotating plate 28 ... Standing part 281 ... Seat fixing part 282 ... Seat belt fixing part 62 ... Upper engaging part 63 ... Lower engaging part

Claims (1)

[Claims] 1. A rotating plate is rotatably supported on a fixed plate fixed to a floor, and the rotating plate is provided with an upright portion that rises obliquely upward at an outer peripheral edge thereof, and a seat and a seat belt are fixed to the upright portion. In the vehicle seat rotating device, the upper engaging member extending downward along the upright portion of the rotating plate on the lower surface of the seat belt fixing portion of the rotating plate is closed with the upstanding portion of the rotating plate. And a lower engaging member that engages with the upper engaging member when the seat is facing forward and backward is fixed to an upper surface of the fixing plate.