JP2000127810A - Rotating device for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure high strength performance with a simple structure, and to realize a smooth rotation operation and superior assembling workability. SOLUTION: A lower rail 1 and an upper rail 2 are assembled, with a flat part 2b of the upper rail 2 faced to the lower end of a wall part 3b of a stopper member 3, and with an inner circumferential edge part 2f introduced into an upturned groove part 15 of the lower rail 1. At that time, a slider 5 is disposed between the lower end of the wall part 3b of the stopper member 3 and the flat part 2b of the upper rail 2, while rotating support members are disposed between the inner circumferential edge part 2f of the upper rail 2 and the upturned groove part 15 of the lower rail 1 so as to support the two in a relatively movable state. Thereby, the upper rail 2 can be smoothly rotated relatively to the lower rail 1 to improve its operability, while the stopper member 3 prevents rising of the upper rail 2 to secure its reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating device for instructing a vehicle seat to rotate freely.

[0002]

2. Description of the Related Art In a vehicle seat, the seat is mounted on a floor of a vehicle body via a rotating device in order to make the seat rotatable so as to respond to diversification of usage modes of a seat on a user side. I have. As such a rotating device for a vehicle seat, those having various structures have been conventionally proposed and put into practical use.

[0003] Such a conventional vehicle seat rotating device is as follows.
A lower rail made of an annular body fixed to the vehicle body side, an upper rail made of an annular body fixed to the seat side, and a stopper member for preventing the upper rail from rising when the lower rail and the upper rail are assembled. Is basically provided.

[0004]

However, in a conventional vehicle seat rotating apparatus having such a basic structure, for example, it is difficult to align the lower rail and the upper rail when the lower rail and the upper rail are assembled. The production cost is low due to the inability to perform a smooth rotation operation, difficulty in obtaining sufficient strength performance due to structural reasons, and difficulty in adding a reinforcement structure, and complicated assembly procedures and poor assembly workability. Problems such as high costs were pointed out in advance.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicular seat rotating apparatus capable of ensuring high strength performance with a simple structure and realizing smooth rotation operation and high assembling workability. It was done as.

[0006]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

In the first invention of the present application, the vehicle seat 20
A vehicle seat rotation device that is disposed between the seat cushion 21 and the vehicle body floor surface 25 and rotatably supports the vehicle seat 20 with respect to the vehicle body floor surface 25;
Upward groove 15 that opens upward and is continuous in the circumferential direction
A lower rail 1 which is constituted by an annular body having a lower surface and is fixed to the vehicle body floor surface 25 side; a flat portion 2b extending substantially horizontally; An upper rail 2 fixed to the seat cushion 21 side, and an annular body having a wall portion 3b hanging downward, which is formed of an annular body having an inner peripheral edge portion 2f extending therefrom; A stopper member 3 fixed to the lower rail 1 in a state where 3b corresponds to the upward groove 15 of the lower rail 1. The lower rail 1 and the upper rail 2 are connected to the flat portion of the upper rail 2. 2
b while the inner peripheral edge 2f is inserted into the upward groove 15 of the lower rail 1 while facing the lower end of the wall 3b of the stopper member 3.
A slider 5 is provided between the lower end of the wall portion 3b of the stopper member 3 and the flat portion 2b of the upper rail 2 opposed thereto, and the inner peripheral edge portion 2f of the upper rail 2 and the A rotation supporting member for supporting the lower rail 1 and the upward groove 15 facing each other so as to be able to rotate relative to each other is provided.

According to a second aspect of the present invention, there is provided a vehicle seat rotating apparatus according to the first aspect of the present invention, wherein the rotating support member is provided with a rotatably supported ball or sliding member. It is characterized by comprising a moving element 7.

According to a third aspect of the present invention, in the vehicle seat rotating apparatus according to the first aspect, the stopper member 3 is opened downward and is continuous in the circumferential direction. It is characterized by comprising an annular body having a downward groove 16 and having a cross-sectional shape symmetrical with the lower rail 1 and having the outer peripheral wall of the downward groove 16 constituting the wall 3b.

In the vehicle seat rotating apparatus according to a fourth aspect of the present invention, in the vehicle seat rotating apparatus according to the third aspect of the present invention, the connecting portion between the lower rail 1 and the stopper member 3 may be appropriately rotated in the circumferential direction. The hook member 4 is attached at the position, and the hook portion 4b of the hook member 4 is moved toward the space formed by the upward groove 15 of the lower rail 1 and the downward groove 16 of the stopper member 3 facing each other. The upper rail 2 extends into the upward groove 15 and is opposed to the inner peripheral edge 2f from above.

According to a fifth aspect of the present invention, there is provided a vehicle seat rotating apparatus according to the first aspect, wherein the outer rail portion 2 of the upper rail 2 is provided.
a, the sheet mounting portion 13 is integrally formed to extend.

[0012]

According to the present invention, the following effects can be obtained by adopting such a configuration.

According to the apparatus for rotating a vehicle seat according to the first invention of the present application, the lower rail 1 and the upper rail 2 are connected to the flat portion 2 b of the upper rail 2.
Is opposed to the lower end of the wall 3b of the stopper member 3 and the inner peripheral edge 2f is inserted into the upward groove 15 of the lower rail 1, and the wall of the stopper member 3 is mounted. A slider 5 is provided between the lower end of the portion 3b and the flat portion 2b of the upper rail 2, and between the inner peripheral edge 2f of the upper rail 2 and the upward groove 15 of the lower rail 1. Since the rotation supporting members for supporting the two are relatively rotatably arranged, (a) the rotation supporting member realizes a smooth relative rotation of the upper rail 2 with respect to the lower rail 1 and the operability is improved. (B) Since the flat portion 2b of the upper rail 2 faces the lower end of the wall 3b of the stopper member 3, the stopper member 3 The lifting of the upper rail 2 is prevented and its reliability is ensured. (C) The lifting of the upper rail 2 by the stopper member 3 is prevented by the sliding action of the slider 5. Since the rotation is carried out without obstructing the smooth rotation of 2, the compatibility between “improvement of operability” and “securing of reliability” as described above can be further ensured.

Further, in assembling the lower rail 1, the upper rail 2 and the stopper member 3, the upper rail 2 is mounted on the lower rail 1 located at the lowermost stage from above the lower rail 1. Thereafter, the uppermost stopper member 3 is assembled to the lower rail 1 from above the upper rail 2, that is, in the assembled state, the stopper member 3 is sequentially located at the uppermost stage from the member located at the lowermost stage. Since it is assembled in one direction toward the member side, the work in the assembling work is smaller than when, for example, there is no directionality in the order of assembling the members, especially in the direction from the lower side to the upper side. Therefore, the manufacturing cost can be reduced and the manufacturing cost can be reduced.

According to the vehicle seat rotation device of the second aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, since the rotation supporting member is constituted by the ball 6 or the slider 7 rotatably supported, for example, when the rotation supporting member is constituted by the ball 6, the rotation can be performed more easily. The operation is realized, and when the rotation supporting member is constituted by the slider 7, weight reduction and cost reduction are promoted.

According to the vehicle seat rotating device of the third aspect of the present invention, the following unique effects can be obtained in addition to the effects described above. That is, according to the present invention, the stopper member 3 is formed of an annular body having a downwardly opening groove 16 that opens downward and is continuous in the circumferential direction and has a cross-sectional shape that is plane-symmetric with the lower rail 1.
Since the wall portion 3b is constituted by the outer peripheral wall portion of the downward groove portion 16, a member having a groove portion is press-formed with a single mold, and the molded product is used with the groove portion directed upward. By doing so, this can be used as the lower rail 1, and by using the groove portion downward, it can be used as the upper rail 2, whereby the members of the lower rail 1 and the upper rail 2 can be used. As a result, commonality can be achieved, and as a result, manufacturing costs can be further reduced.

According to the vehicle seat rotating device of the fourth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, the hooking member 4 is attached to an appropriate position in the circumferential direction of the connecting portion between the lower rail 1 and the stopper member 3, and the hooking portion 4b of the hooking member 4 is attached to the lower rail 1 The upward groove 15 and the downward groove 1 of the stopper member 3
6 and the inner peripheral edge 2 of the upper rail 2 extending into the upward groove 15.
f, the upper rail 2 is engaged with the inner peripheral edge 2f of the upper rail 2 so that the latch 4b of the latch member 4 is engaged with the inner peripheral edge 2f of the upper rail 2.
A part of the load caused by the lifting of the lower rail 1 is supported by the lower rail 1 via the latching member 4,
The lifting of the upper rail 2 is further reliably prevented in combination with the lifting prevention action of the stopper member 3. In addition, the position where the hooking member 4 is disposed is a connecting portion between the lower rail 1 and the stopper member 3,
Moreover, since the extending position of the engaging portion 4b is a space formed by the upward groove 15 of the lower rail 1 and the downward groove 16 of the stopper member 3 facing each other,
An arrangement space for the hanging member 4 can be easily secured. Therefore, by arranging an appropriate number of the hanging members 4 as necessary in terms of strength, reliability for preventing the upper rail 2 from floating can be improved. Will be further enhanced.

According to the vehicle seat rotating device of the fifth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above. That is, in the present invention, since the seat mounting portion 13 is integrally formed on the outer peripheral edge portion 2a of the upper rail 2, the seat mounting portion having a different structure is provided on the upper rail 2, for example. As compared with the case of the structure, the number of parts and the number of assembling steps are reduced, so that the manufacturing cost can be further reduced.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vehicle seat rotating device according to the present invention will be specifically described based on a preferred embodiment.

FIG. 1 shows a vehicle seat device. In FIG. 1, reference numeral 20 denotes a vehicle seat comprising a seat cushion 21 and a seat back 22. The vehicle seat 20 is rotatably attached to a vehicle body floor 25 and is provided with the seat cushion 21.
And a seat mounting base 24 fixed to the vehicle body floor surface 25 side with a rotating device Z according to an embodiment of the present invention interposed therebetween. I have. Hereinafter, the specific structure and operation of the rotating device Z will be described.

As shown in FIGS. 2 to 4, the rotating device Z includes a lower rail 1, an upper rail 2, and a stopper member 3 described below.

The lower rail 1 is formed by press-forming an annular plate material. The lower rail 1 has a flat portion 1a formed of an annular flat plate, and an outer peripheral wall portion 1b rising up continuously to the outer peripheral edge of the flat portion 1a. An inner peripheral wall portion 1c rising upward continuously to the inner peripheral edge of the flat portion 1a; and a flange extending radially inward substantially parallel to the flat portion 1a and continuously to the upper end edge of the inner peripheral wall portion 1c. And a bent cross-sectional structure including a portion 1d. The flat portion 1a, the outer peripheral wall portion 1b and the inner peripheral wall portion 1c rising on both sides in the radial direction form an upward groove 15 that opens upward and is continuous in the circumferential direction. The lower rail 1 has its lower surface fixed to the seat mounting base 24 in a tail-fitting manner.

The upper rail 2 is formed by press-forming an annular plate material. The upper rail 2 is located near the outer periphery thereof and has an outer peripheral edge 2a having a groove-like cross-sectional shape that opens downward. An outer flat portion 2b extending radially inward from the inner peripheral edge of the peripheral portion 2a, and an outer flat portion 2b;
And an inner peripheral edge portion 2f having a groove-like cross-sectional shape which is located radially inward of the inner peripheral edge of the inner peripheral portion and opens upward. The inner peripheral edge portion 2f is connected to the inner peripheral edge of the outer flat portion 2b so as to be inclined downward inward in the radial direction, and the outer peripheral portion 2f is connected to the inner peripheral edge of the inclined wall portion 2c. An inner flat portion 2d extending radially inward substantially in parallel with the flat portion 2b, and an inner peripheral wall portion 2e rising upward continuously to the inner peripheral edge of the inner flat portion 2d.

The upper rail 2 is coaxially mounted on the upper surface of the lower rail 1. The outer flat portion 2 b corresponds to the outer peripheral wall portion 1 b of the lower rail 1. , The inner peripheral edge 2f
The shape and dimensions are set relatively to the lower rail 1 so that the lower rail 1 is accommodated in the upward groove 15 of the lower rail 1. When the lower rail 1 and the upper rail 2 are assembled, the inner corners of the flat portion 1a and the inner peripheral wall 1c in the upward groove 15 of the lower rail 1; 15 between the inner flat portion 2d of the upper rail 2 and the outer surface corner of the inner peripheral wall portion 2e at a predetermined pitch in the circumferential direction. Are provided so that the relative movement of the lower rail 1 and the upper rail 2 can be smoothly performed by the rolling operation of each of the balls 6, 6,.

In this embodiment, a plurality of sheet mounting portions 13, 13,... Are integrally formed on the outer peripheral edge portion 2a of the upper rail 2 so as to extend therefrom. , 13,..., The upper rail 2 is fixed to the seat support base 23 side.

The stopper member 3 is formed by press-forming an annular plate material. In this embodiment, in particular, the cross-sectional shape of the stopper member 3 is set to be the same as that of the lower rail 1, and By turning the lower rail 1 upside down, it can be used as the stopper member 3 as it is. Accordingly, the stopper member 3 is provided with a downward groove 16 composed of a flat portion 3a, an outer peripheral wall portion 3b, and an inner peripheral wall portion 3c, corresponding to the structure of the lower rail 1. A flange 3d is provided radially inside the peripheral wall 3c.

The stopper member 3 configured as described above prevents the upper rail 2 assembled to the lower rail 1 from being detached upward from the lower rail 1 so that both of them are stable and highly reliable. This is for realizing relative rotation. Therefore, in order to realize such a function, the stopper member 3 is connected to the upper rail 2.
Are arranged coaxially from above with respect to the lower rail 1 in a state where it is assembled, and the flange 1d on the side of the lower rail 1 and the flange 3d on the side of the stopper member 3 that abut against each other are arranged in the circumferential direction. Are integrated with the lower rail 1 by fastening with a plurality of bolts 18 arranged at predetermined intervals.

When the stopper member 3 is completely assembled to the lower rail 1, the downward groove 16 of the stopper member 3 and the upward groove 1 of the lower rail 1 are removed.
5 is accommodated in a space formed to face the upper rail 2 in the up-down direction, and the inner peripheral edge 2f of the upper rail 2 is housed in the space.
The lower end edge of the outer peripheral wall 3b of the stopper member 3 is closely opposed to the outer flat portion 2b of the upper rail 2 from above. Then, an upward load is applied to the upper rail 2 so that the upper rail 2
When the upper rail 2 is lifted up from above, the outer flat portion 2b of the upper rail 2 is engaged with the lower end of the outer peripheral wall 3b of the stopper member 3, whereby the lifting of the upper rail 2 is restricted. In this case, in order to maintain a smooth relative rotation of the upper rail 2 with respect to the lower rail 1 even during the lifting restriction action, in the embodiment, the stopper member 3 is provided with a lower end portion of the outer peripheral wall 3b. A slider 5 made of resin is attached, and a smooth relative rotation is realized by the sliding action of the slider 5.

By arranging the stopper member 3 on the lower rail 1 side, the upper rail 2
Of the upper rail 2 and smooth rotation of the upper rail 2 can be realized. In this embodiment, however, the upward groove 15 of the lower rail 1 and the downward movement of the stopper member 3 can be realized. The inner peripheral edge 2f of the upper rail 2 is accommodated in a space formed to face the groove 16, and even in the accommodated state of the inner peripheral edge 2f, the space is relatively large. In view of the fact that there is room in space, by arranging the following latching member 4 here, the lifting of the upper rail 2 is more reliably prevented, and the reliability in use of the rotating device Z is further improved. I try to raise it.

That is, the latching member 4 is formed by bending one end of a substantially rectangular plate material into a U-shape, and has a flat fixing portion 4a and a U-shaped cross-sectional shape. And a hook portion 4b. The hook member 4 is provided inside the hook portion 4b with the inner peripheral wall portion 2 of the upper rail 2.
e and the upper end of the inner peripheral wall 2 e is
b in the state of being closely opposed to the inner surface of the
a is sandwiched between the flange portion 1d of the lower rail 1 and the flange portion 3d of the stopper member 3, and the fixing portion 4a is integrated with the flange portions 1d, 3d by the bolt 18. It is fixed by tightening it. In this case, a portion of the flange portion 3d of the stopper member 3 corresponding to the position where the hooking member 4 is disposed is formed to protrude by a dimension corresponding to the plate thickness of the hooking member 4. The above-mentioned hooking member 4 is
Of the fixing portion 4a.

In the case where the upper rail 2 is lifted up by providing the hook member 4 in this manner, the inner peripheral wall 2e of the upper rail 2 is connected to the hook portion of the hook member 4. 4b is prevented from floating. Therefore, a higher reliability is ensured by the synergistic effect of the lifting prevention action by the stopper member 3 and the lifting prevention action by the hooking member 4.

In this embodiment, taking into account the state of the load applied to the upper rail 2, a portion where the requirement for lifting prevention is the highest, that is, a portion located on the rear side of the seat as shown in FIG. The above-mentioned hook members 4 are arranged at the two positions, respectively, but the number of the hook members 4 can be arbitrarily increased or decreased as necessary.

Reference numeral 8 in FIGS. 2 and 3 denotes a lock member for locking the upper rail 2 to the lower rail 1 at a predetermined rotation position.
The lock member 8 is attached to the lower part of the outer periphery of the lower rail 1 by a pivot pin 9. By appropriately operating the operation part 8 a at one end, the lock claw 8 b provided at the other end is moved to the above position. Lock hole 11 on the lower rail 1 side
And the lock hole 12 on the upper rail 2 side is engaged or disengaged, thereby setting a locked state or an unlocked state.

Further, in FIG. 2, reference numeral 10 denotes a leaf spring. The leaf spring 10 plays back of the upper rail 2 in a state where the upper rail 2 is locked to the lower rail 1 by the lock member 8. This is to prevent it.

In the rotating device Z configured as described above, the following specific effects can be obtained.

That is, in the rotating device Z of this embodiment, the lower rail 1 and the stopper member 3 are formed in the same shape so that they can be used in common. This can be manufactured by using, and the reduction of the manufacturing cost is further promoted accordingly.

Since the balls 6, 6,... Arranged between the lower rail 1 and the upper rail 2 realize a smooth relative rotation of the upper rail 2 with respect to the lower rail 1, a vehicle seat is provided. 20 can be easily rotated, and the operability is improved.

Further, the outer flat portion 2b of the upper rail 2 is connected to the outer peripheral wall 3b of the stopper member 3.
Since the stopper member 3 is opposed to the lower end of the upper rail 2, the lifting of the upper rail 2 is prevented by the stopper member 3, and high reliability in use is obtained.

In this case, the stopper member 3
Of the upper rail 2 is prevented by
Because the sliding operation of the slider 5 is performed without hindering the smooth rotation of the upper rail 2,
As described above, compatibility between "improvement in operability" and "securing reliability" is further ensured.

On the lower rail 1 side, the latch members 4, 4,... Which can be engaged with the inner peripheral wall 2e of the upper rail 2 are provided, and a part of the load caused by the lifting of the upper rail 2 is reduced. Since the lower rail 1 is supported on the side of the lower rail 1 via the hooking member 4, the lifting of the upper rail 2 is further reliably prevented in combination with the lifting prevention action of the stopper member 3.

On the other hand, when assembling the lower rail 1, the upper rail 2 and the stopper member 3, the upper rail 2 is mounted on the lower rail 1 located at the lowermost stage from above the lower rail 1. Thereafter, the stopper member 3 located at the uppermost stage is assembled to the lower rail 1 from above the upper rail 2, that is,
In the state of the assembly completed state, since the members are sequentially mounted in one direction from the member located at the lowest stage toward the member located at the uppermost stage, for example, the direction of assembly of each member is directional, particularly Compared with the case where there is no direction from the side to the upper side, the workability in the assembling work is improved, and the production cost can be reduced.

FIG. 5 shows a main part of another embodiment of the vehicle seat rotating device according to the present invention. The basic configuration of the rotating device Z is the same as that of the above-described embodiment, except that the lower rail 1 is replaced with the balls 6, 6,.
A slider 7 made of resin is arranged between the upper rail 2 and the upper rail 2.
2 realizes a smooth relative rotation. The configuration and operation and effect of the other parts are the same as those in the above-described embodiment, and thus description thereof will be omitted.

[Brief description of the drawings]

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

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a cross-sectional view showing a main structure of a rotation device according to another embodiment of the present invention, and corresponds to FIG.

[Explanation of symbols]

1 is a lower rail, 1a is a flat portion, 1b is an outer peripheral wall portion, 1c
Is the inner wall, 1d is the flange, 2 is the upper rail,
2a is an outer peripheral portion, 2b is a flat portion, 2c is an inclined wall portion, 2d
Is an inner flat portion, 2e is an inner peripheral wall portion, 2f is an inner peripheral edge portion, 3 is a stopper member, 3a is a flat portion, 3b is an outer peripheral wall portion, 3c.
Is an inner peripheral wall portion, 3d is a flange portion, 3e is a raised portion, 4 is a latching member, 5 is a slider, 6 is a ball, 7 is a slider, 8 is a lock member, 9 is a pivot pin, and 10 is a pivot pin. Leaf springs, 11 and 12
Is a lock hole, 13 is a seat mounting portion, 15 is an upward groove, 1
6 is a downward groove, 18 and 19 are bolts, 20 is a vehicle seat, 21 is a seat cushion, 22 is a seat back,
23 is a seat support, 24 is a seat mounting base, 25 is a vehicle body floor, and Z is a rotating device.

Claims (5)

[Claims] 1. A vehicle seat (20) disposed between a seat cushion (21) of a vehicle seat (20) and a vehicle body floor (25) to rotate the vehicle seat (20) relative to the vehicle body floor (25). A rotating device for a vehicle seat that freely supports, comprising an upward groove (1) that opens upward and is continuous in the circumferential direction.
5) and the vehicle body floor (2)
5) A lower rail (1) fixed to the side, a flat portion (2b) extending substantially horizontally, and an inner peripheral edge extending radially inward from the inner peripheral edge of the flat portion (2b). (2f) and an upper rail (2) fixed to the seat cushion (21) side.
The lower rail (1) is formed of an annular body having a wall portion (3b) that hangs downward, and the wall portion (3b) corresponds to the upward groove (15) of the lower rail (1). And a stopper member (3) fixed to the lower rail (1) and the upper rail (2), and the flat part (2b) of the upper rail (2) is connected to the stopper member (3). While being opposed to the lower end of the wall portion (3b) and the inner peripheral edge portion (2f) is inserted into the upward groove (15) of the lower rail (1), the stopper member (3) is assembled. ), A slider (5) is provided between the lower end of the wall portion (3b) and the flat portion (2b) of the upper rail (2) opposed thereto, and the upper rail (2) Of the above inner peripheral edge (2f) and this The upper groove (1) of the lower rail (1) facing the
A rotation device for a vehicle seat, wherein a rotation support member for supporting both of them relative to each other is disposed between the rotation device and the rotation device. 2. The vehicle seat rotation device according to claim 1, wherein the rotation support member is a rotatably supported ball (6) or a slider (7). 3. The stopper member (3) according to claim 1, wherein the stopper member (3) is provided with a downward groove (16) that opens downward and is continuous in the circumferential direction, and has a cross-sectional shape that is plane-symmetric with the lower rail (1). A rotating device for a vehicle seat, comprising an annular body, wherein the wall portion (3b) is constituted by an outer peripheral wall portion of the downward groove portion (16). 4. A hooking member (4) according to claim 3, wherein a hooking member (4) is attached at an appropriate position in a circumferential direction of a connecting portion between the lower rail (1) and the stopper member (3). The stop portion (4b) is extended toward a space defined by the upward groove (15) of the lower rail (1) and the downward groove (16) of the stopper member (3) facing each other. A rotating device for a vehicle seat, wherein the upper rail (2) extending into the facing groove (15) is closely opposed to the inner peripheral edge (2f) from above. 5. The vehicle seat according to claim 1, wherein a seat mounting portion (13) is integrally formed on an outer peripheral portion (2a) of the upper rail (2). Rotating device.