JPH0790738B2 - Seat reversing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reversing device for automatically reversing a vehicle seat.

[0002]

2. Description of the Related Art Conventionally, when the direction of a seat for a railway vehicle is changed, for example, a pedal of a lock lever attached to the seat is pushed down to release the locked state of the seat, and the seat is inverted 180 ° by a manual operation. It was

[0003]

In a railway vehicle in which a large number of seats are installed in a vehicle, there is a problem that the work of reversing a large number of seats in a short time when the traveling direction of the vehicle is changed is complicated and labor-intensive. . The present invention aims to solve the above problems.

[0004]

A seat reversing device according to the present invention has a counterclockwise rotating end rotated 180 ° counterclockwise from a clockwise rotating end and a right rotating 180 ° rotated clockwise from a counterclockwise rotating end. A drive in which a pushing member that turns around the rotation axis of the seat is fixed when the seat that rotates horizontally within the range of the rotation end of the rotation is reversed, and is driven to rotate counterclockwise and clockwise by a rotation controllable motor. The panel, the unlocking means for releasing the locked state of the seat lock mechanism, and the counterclockwise and clockwise rotation over the 180 ° angular range by being pushed by the pushing member after the locked state of the seat lock mechanism is released. A seat turntable fixed to a driven member that turns while avoiding the turning start position of the pushing member and coupled to the seat in a concentric state with the drive plate, and a sensor that detects unlocking of the seat lock mechanism are provided. I was having the configuration.

[0005]

When the drive panel whose rotation is controlled by the motor rotates and the pushing member fixed to this drive panel turns counterclockwise or clockwise about the rotation axis of the seat, the locked state of the seat lock mechanism is changed. After being released, the driven member of the seat turntable, which is concentrically connected to the seat, is pushed in the turning direction by the pushing member to avoid the turning start position of the pushing member over an angular range of 180 °. Turn,
The seat is flipped 180 ° from the clockwise or counterclockwise rotating end to the counterclockwise or clockwise rotating end.

[0006]

Since the present invention is configured as described above, the seat reversing operation can be accurately performed by controlling the respective rotating operations of the drive plate and the seat rotating plate.
Moreover, since the locked state of the seat lock mechanism can be properly released and the seat can be turned counterclockwise and clockwise before the seat is turned over, the turning operation of the seat can be smoothed and stabilized. The seat reversing device can be simplified and made compact. In addition, since the mechanism for driving the seat does not use an electromagnetic clutch, a solenoid, or the like, the seat reversing device can be made lighter, and noise caused by the operation of the electromagnetic clutch or the solenoid can be eliminated. Further, since the driven member turns while avoiding the turning start position of the pushing member when the seat is turned over, when the seat is turned over manually, the driven member can turn regardless of the pushing member. Therefore, it is possible to eliminate the problem that the rotation operation of the seat is transmitted to the mechanism for automatically reversing the seat when the seat is manually reversed, and the reversing operation force for reversing the seat increases. Further, according to claim 2, the mechanism can be made more compact and lightweight.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. The seat reversing device is installed for reversing a large number of seats 1 arranged on both sides of a passage in one passenger compartment of a vehicle, and each seat 1 has a pair of left and right seats 1a and a pair of left and right backrests 1b. It has two seats and is installed on each of the support bases 3 fixed to the floor surface F.

A center frame 2a is provided at the center of the lower surface of the seat frame 2 connected to the lower surfaces of both seats 1a of the seat 1.
At the center of the center frame 2a, a support shaft 5 rotatably supported via a bearing 33 is fixedly hung at the center of the upper end of the support base 3, and the seat 1 is supported by the support base 3. The seat 1 is supported via a support shaft 5 so as to be horizontally rotatable about the center of the seat 1 in the front-rear direction and the left-right direction, and the sliding portion 2b of the seat frame 2 is slidable by the receiving portion 3a of the support base 3. Is supported by. The seat frame 2 is equipped with a reclining mechanism having a pair of dampers for continuously adjusting the tilt angle of each backrest 1b of the seat 1.

Near the inner end of the upper surface of the support base 3, the first abutment pin 10A and the second abutment pin 10B, which are fixed near both ends of the seat frame 2 in the longitudinal direction, are arranged on the rotation loci. A pair of front and rear stoppers 4, 4 with which the butting pins 10A, 10B abut at the rotating end of the seat 1 are fixed.

The state of FIG. 5 (A) in which the seat 1 rotates clockwise (clockwise) and is turned to the clockwise rotation end (backrest 1
In the state where b is the rear side and the seat 1 is facing forward with respect to the traveling direction of the vehicle), the second abutment pin 10B abuts the stopper 4 on the rear side (backrest side) and 180 ° of the seat 1
The above-described clockwise rotation is blocked, and the seat 1 is rotated 180 ° counterclockwise from the clockwise rotation end to the counterclockwise rotation end and rotated to the counterclockwise rotation end (the backrest 1b is When the seat 1 is on the front side and the seat 1 is on the rear side), the second butting pin 10A abuts the stopper 4 on the front side (anti-backrest side) to prevent the seat 1 from rotating counterclockwise by 180 ° or more. When the seat 1 is rotated to the left or right rotating end, the leg portions 2c and 2c formed near both ends of the seat frame 2 are placed on the receiving plates 3c and 3c of the support base 3.

A pair of lock plates 6 and 6 are horizontally mounted near both ends of the seat frame 2 in the longitudinal direction. The lock plates 6 have a center of rotation axis a of the support shaft 5 at 180 degrees. The lock holes 6a arranged at rotationally symmetrical positions of ° are provided so as to penetrate therethrough.

A bracket 9 mounted near the inner end of the support base 3 has a horizontal portion 7a whose outer end is biased upward by a spring, and a vertical portion which is erected at the inner end of the horizontal portion 7a. 7
The horizontal portion 7a of the swinging arm 7 having b is pivotally supported so as to be swingable in the vertical direction, and the roller 11 protruding toward the support shaft 5 is rotatable at the upper end of the upright portion 7b of the swinging arm 7. A horizontally elongated connecting hole 7c is provided at the outer end of the horizontal portion 7a so as to be axially supported.

Above the horizontal portion 7a of the swing arm 7, a lock release lever 12 whose inner end is pivotally supported by a bracket 9 is installed so as to be tiltable in the vertical direction.
A rectangular tube-shaped insertion portion 12b is formed in the vicinity of the central portion of 2,
A pedal 12a for stepping is formed at the outer end of the unlock lever 12 and is urged upward by a spring. The lock release lever 12 is connected to both the dampers of the reclining mechanism by a wire. When the pedal 12a of the lock release lever 12 is depressed, the dampers return to their original state, and the reclining state of the backrests 1b is released.

An outer end portion of the upper end of the support base 3 is inserted into an insertion portion 12b of the lock release lever 12 to be inserted into the lock release lever 12.
A round rod-shaped lock pin 13 connected by a pin is vertically supported so as to be vertically movable.

The lower end of the lock pin 13 has a vertically-long connecting hole 13a penetrating the lower end and a connecting hole 7 of the swing arm 7.
c and is connected to the outer end of the horizontal portion 7a of the swing arm 7 by a connecting pin 14, and the upper end of the lock pin 13 projects into one of the lock holes 6a of the lock plates 6a. The seat 1 is locked by the lock pin 13 at the counterclockwise rotation end or the clockwise rotation end.

When the pedal 12a of the unlocking lever 12 is pushed down, the lock pin 13 moves downward and the lock pin 13
The upper end of the seat escapes downward from the lock hole 6a, and the seat 1 is unlocked. At this time, even if the lock pin 13 is moved downward, the connecting pin 14 is inserted into the upper end of the connecting hole 13a, so that the downward movement of the lock pin 13 is not transmitted to the swing arm 7.

When the roller 11 is pushed up, the swing arm 7
The horizontal portion 7a of the seat swings, the outer end of the horizontal portion 7a moves downward, the lock pin 13 moves downward together with the connecting pin 14, and the upper end of the lock pin 13 comes out of the lock hole 6a. Is released.

A motor base 15 fixed to the lower portion near the inner end of the support base 3 has an output shaft 16a projecting upward, and a motor with a reduction mechanism that is rotationally controlled in the counterclockwise and clockwise directions. 16 is attached, and a sprocket wheel 17 is fitted on an output shaft 16 a of the motor 16. The motor 16 has a built-in slip clutch that idles the output shaft 16a when the output shaft 16a is overloaded.

A chain 20 is mounted on a sprocket wheel 17 connected to the motor 16 and a sprocket wheel 18 which is fitted around the center of the support shaft 5 via a bush 19 so as to be freely rotatable. Is transmitted to the sprocket wheel 18 via the sprocket wheel 17 and the chain 20, and the sprocket wheel is rotationally driven in the counterclockwise direction and the clockwise direction.

On the sprocket wheel 18, there is provided a disk-shaped drive plate 22 which is juxtaposed below the sprocket wheel 18 and in which a bush 19 is loosely inserted in the center thereof. The drive plate 22 extends through the drive plate 22 and the sprocket wheel 18. Are connected concentrically and co-rotatably by the connecting pin 36,
The drive board 22 is projected downward at the peripheral edge of the drive board 2
A nut 31 in which a pin-shaped pushing member 23 that swivels around the rotation axis a of the support shaft 5 when the spindle 2 rotates is screwed into its threaded portion.
It is fastened and fixed by.

When the counterclockwise reversing switch of the counterclockwise reversing switch and the clockwise reversing switch inserted in the distribution box of the vehicle is pressed, the motor 16 rotates counterclockwise and the drive panel 22 rotates counterclockwise. When it is driven and the clockwise reversal switch is pressed, the motor 16 rotates clockwise and the drive board 22
Is driven to rotate clockwise.

Of the rotation locus of the pushing member 23, it is 90 ° clockwise away from the turning position c when turning on a line segment b connecting the rotation axis a of the support shaft 5 and the axis of the lock pin 13. In this example, the pushing position is the origin position d at which the pushing member 23 starts turning.
It is prescribed. The drive board 22 is rotationally controlled such that the pushing member 23 turns about 270 ° from the origin position d and then turns about 270 ° in the opposite direction to return to the origin position d.

Below the drive board 22, a disc-shaped interlocking board 25, which is rotatably fitted to the support shaft 5 via a bearing 34 and linked to the drive board 22 so as to rotate together, is concentric with the drive board 22. The drive plate 22 has a plane shape curved in an arc shape around the rotation axis a of the support shaft 5 and is mounted on the interlocking plate 25.
Of the through hole 26 through which the pushing member 23 of FIG.
It penetrates over an angle range slightly smaller than 0 °.

At both ends of the through hole 26 of the interlocking board 25, a first hole edge 27 is pushed counterclockwise by the pushing member 23.
A and the second hole end edge 27B pushed in the clockwise direction by the pushing member 23 are curvedly formed in an arc shape.

When the drive plate 22 rotates counterclockwise and the pushing member 23 comes into contact with the first hole end edge 27A of the through hole 26 during the rotation, the first hole end edge 27A is moved by the pushing member 23. The interlocking board 25 is rotated counterclockwise together with the drive board 22 by being pushed in the turning direction.

When the drive plate 22 rotates clockwise and the pushing member 23 comes into contact with the second hole end edge 27B of the through hole 26 during the rotation, the second hole end edge 27B is moved by the pushing member 23. By being pushed in the turning direction, the interlocking board 25 is rotated clockwise together with the drive board 22.

A stepped portion 25a is formed near the peripheral edge of the interlocking disk 25 so as to project outward from the peripheral edge of the drive disk 22 and the height of the upper surface is slightly lowered. A dog 28, which is arranged outside the first hole end edge 27A of 26 and has a trapezoidal longitudinal section, is fixed to move the roller 11 up and down. A horizontal plane 28 a is formed in the center of the upper surface of the dog 28.
A pair of inclined surfaces 28b, 28b inclined upward toward the horizontal plane 28a are formed symmetrically on both sides of a.

When the interlocking board 25 rotates counterclockwise or clockwise and the dog 28 comes into contact with the roller 11, the roller 11 is pushed up by the dog 28 and the swing arm 7 swings.
The lock pin 13 moves downward, the upper end of the lock pin 13 is removed from the inside of the lock hole 6a, and the locked state of the seat 1 is released.

On the lower side of the interlocking disc 25, there is concentrically arranged a disc-shaped seat rotary disc 29 which is rotatably coupled to the support shaft 5, and a drive is provided on the peripheral portion of the upper surface of the seat rotary disc 29. Board 22
Of the pushing member 23 arranged on the rotation locus of the pushing member 23
The driven member 30, which is pushed counterclockwise and clockwise by an angle range of 180 °, is fastened and fixed by the nut 32 screwed into the threaded portion.

When the seat 1 is turned to the clockwise rotation end, the driven member 30 moves to the turning position c, which is 90 ° counterclockwise from the origin position d, and the seat 1 rotates to the counterclockwise rotation end. Then, it is arranged so as to shift to the turning position e, which is 90 ° clockwise away from the origin position d, and to turn while avoiding the origin position d.

Depending on the presence or absence of both butting pins 10A, 10B near both stoppers 4 on the seat frame 2, the seat 1
Counterclockwise inversion completion sensor 34 for detecting the completion of the inversion operation of
B and the clockwise reversal completion sensor 34A are installed, and when the seat 1 at the clockwise rotation end rotates counterclockwise 180 ° and the first butting pin 10A comes into contact with the stopper 4 on the front side, the counterclockwise rotation on the front side is performed. When the reversal completion sensor 34B is turned on and the seat 1 at the left-hand rotation end rotates 180 ° clockwise and the second butting pin 10B comes into contact with the rear stopper 4, the clockwise reversal completion sensor 34A Turns on.

First and second dog position sensors 35A and 35B, which are arranged near the turning position c and detect the position of the dog 28, are installed on the support base 3 at predetermined intervals, and the dog 28 is When the dog 11 moves to an intermediate position between the dog position sensors 35A and 35B, the roller 11 is pushed up by the dog 28 and the dog position sensors 35A and 3B
5B is turned on, and the motor 16 stops rotating for A seconds required for returning the reclining mechanism. An origin position detection sensor that is turned on when the pushing member 23 turns to the origin position d may be provided, and the rotation of the motor 16 may be stopped by a detection signal from the origin position detection sensor. Further, the driven member 30 of the seat turntable 29
The completion of the reversing operation of the seat 1 may be detected by a sensor that detects the position of.

Next, the reversing operation of the seat 1 will be described. When the seat 1 is rotated clockwise to the rotation end and is locked in the forward direction, the driving board 22 pushes the pushing member 23 to the origin position d. The stationary platen is moved in a stationary state, the interlocking plate 25 is stationary in a state in which the first hole end edge 27A is moved to the origin position d and the dog 28 is moved obliquely outward of the origin position d, and the seat turntable 29 is a driven member. In the state where 30 has moved to the turning position c (see FIG. 6A), the counterclockwise reversal completion sensor 34B is OFF, and the counterclockwise reversal completion sensor 34A is ON.

In this state, when the counterclockwise reversing switch is pressed, the motor 16 is activated counterclockwise, the drive board 22 is rotated counterclockwise, and the pushing member 23 is moved from the origin position d to the first position.
Rotating counterclockwise while pushing the hole edge 27A, interlocking board 2
5 rotates counterclockwise with the drive board 22.

The drive board 22 rotates counterclockwise by about 90 °, the pushing member 23 moves slightly before the turning position c, and the dog 2 moves.
When 8 turns to the outside of the turning position c (see FIG. 6 (B)), the roller 11 is pushed up by the dog 28, the lock pin 13 moves downward, and the locked state of the seat 1 is released. Both the first dog position sensor 35A and the second dog position sensor 35B are turned on by the passage of the dog 28.
The rotation of the motor 16 is stopped at N for A seconds (the time required for the return operation of the reclining mechanism).

After a lapse of A seconds in this state, the motor 16 is restarted and the drive board 22 is driven to rotate counterclockwise, so that the pushing member 23 abutting the driven member 30 causes the driven member 30 and the first hole edge. The seat 1 rotates counterclockwise while pushing 27A, and the seat 1 rotates counterclockwise. At the time when the seat 1 starts rotating, the clockwise reversal completion sensor 34A becomes 0FF. Driven member 3
0 is pushed by the pushing member 23, 180 ° counterclockwise
When the seat 1 turns to the turning position e (see FIG. 6C) and the seat 1 is turned to the counterclockwise rotation end, the counterclockwise reversal completion sensor 34B is turned on and the motor 16 rotates for B seconds. The seat 1 is stopped and the seat 1 is locked by the lock pin 13 at the counterclockwise rotating end.

B seconds after the rotation of the motor 16 is stopped, the motor 16 is rotationally driven in the clockwise direction for the time set by the timer, the drive board 22 is rotated clockwise, and the pushing member 23 is moved in the interlocking board. The second hole of the interlocking board 25 is rotated about 270 ° clockwise while leaving the first hole end edge 27A of 25.
It hits the hole edge 27B and pushes the second hole edge 27B to rotate the interlocking board 25 together with the drive board 22 in the clockwise direction by about 90 °, and the dog 28 is not rotated to the position of the roller 11 but is at the origin position. The process shifts to d (see FIG. 6D). Interlocking board 25
The second hole edge 27B of the dog 28 moves to the origin position d.
Shifts diagonally outward of the origin position d, and when the pushing member 23 returns to the origin position d, the rotation of the motor 16 stops and the counterclockwise reversal operation of the seat 1 is completed.

When reversing the seat 1 at the clockwise rotation end, the drive board 22 stands still with the pushing member 23 moved to the origin position d, and the interlock board 25 has the second hole edge 27B at the origin position. d and the dog 28 is 180 ° from the origin position d.
The seat turntable 29 stands still in a state in which it moves diagonally outward to a distant position, and the seat turntable 29 remains in a state in which the driven member 30 has moved to the turning position e (see FIG. 7A), and the counterclockwise inversion completion sensor 34.
B is ON, and the clockwise inversion completion sensor 34A is OFF.

In this state, when the clockwise reversing switch is pressed, the motor 16 is started clockwise, the drive board 22 is rotated clockwise, and the pushing member 23 is moved from the origin position d to the second position.
Rotating clockwise while pushing the hole edge 27B, interlocking board 2
5 rotates clockwise with the drive board 22.

The drive board 22 rotates clockwise by about 90 °, the pushing member 23 moves slightly before the turning position e, and the dog 2 moves.
When 8 turns to the outside of the turning position c (see FIG. 7B), the roller 11 is pushed up by the dog 28, the lock pin 13 moves downward, and the locked state of the seat 1 is released. Both the first dog position sensor 35A and the second dog position sensor 35B are turned on by the passage of the dog 28.
It becomes N and the rotation of the motor 16 is stopped for A seconds.

In this state, after a lapse of A seconds, the motor 16 is again started in the clockwise direction, the drive board 22 is rotated in the clockwise direction, and the pushing member 23 abutting on the driven member 30 is driven by the driven member 30 and the first member. The seat 1 is rotated clockwise while pushing the two-hole end edge 27B while rotating clockwise, and the counterclockwise reversal completion sensor 34B becomes 0FF when the seat 1 starts rotating.
When the driven member 30 is pushed by the pushing member 23, it turns 180 ° clockwise and moves to the turning position c (see FIG. 7 (C)), and when the seat 1 reverses to the clockwise rotation end, The clockwise inversion completion sensor 34A is turned on, the rotation of the motor 16 is stopped for B seconds, and the seat 1 is locked by the lock pin 13 at the clockwise rotation end.

B seconds after the rotation of the motor 16 is stopped, the motor 16 is rotationally driven in the counterclockwise direction for the time set by the timer, the drive board 22 is rotated clockwise, and the pushing member 23 is rotated counterclockwise. About 270 °, and hits the first hole edge 27A of the interlocking board 25 in the middle of turning, and the first hole edge 2
7A is pushed to rotate the interlocking board 25 together with the drive board 22 counterclockwise by about 90 °, and the dog 28 is moved to the origin position d without turning to the position of the roller 11 (see FIG. 7D). The rotation of the motor 16 is stopped when the first hole edge 27A of the interlocking board 25 moves to the origin position d, the dog 28 moves diagonally outward of the origin position d, and the pushing member 23 returns to the origin position d. When stopped, the clockwise reversal operation of the seat 1 is completed.

When the counterclockwise reversing operation is performed for another seat while the seat 1 is already reversed to the counterclockwise rotating end, that is, as shown in FIG. 8A, the seat turntable 29 is driven. The member 30 has already moved to the turning position e, the pushing member 23 of the drive board 22 has moved to the origin position d, the first hole end edge 27A of the interlocking board 25 has moved to the origin position d, and the dog 28 has been moved to the origin position. It shifts to the diagonally outer side of d, and the counterclockwise inversion completion sensor 34B
When the counterclockwise inversion switch is pressed while is ON,
The drive board 22 is driven to rotate counterclockwise, the pushing member 23 turns counterclockwise while pushing the first hole end edge 27A, and the interlocking board 25 rotates counterclockwise together with the drive board 22.

When the pushing member 23 turns to the turning position c together with the first hole edge 27A and the dog 28 moves to the outside of the turning position c, the locked state of the seat lock mechanism is released and both dog positions are released. Both sensors 35A and 35B are O
The rotation speed of the motor 16 is stopped at N (see FIG. 8B).

Even if the driven member 30 of the seat turntable 29 has already swung to the swivel position e, the driven member 3
The same operation as when turning 0 from turning position c to e is performed.

Next, the operation and effect of the embodiment having the above configuration will be described. In this example, a seat that horizontally rotates within a range of a counterclockwise rotating end that is rotated 180 ° counterclockwise from the clockwise rotating end and a clockwise rotation end that is rotated 180 ° clockwise from the counterclockwise rotating end. Rotation axis a of seat 1 when 1 is inverted
The pushing member 23 that turns within an angle range of about 270 ° is fixed, and the driving plate 22 that is rotationally driven counterclockwise and clockwise by the motor 16 and the pushing member 23 are inserted to push the pushing member 23. Circular hole-shaped through hole 2 having a pair of hole end edges 27A, 27B pushed by 23 formed at both ends.
6, the dog 28 for unlocking the locked state of the seat lock mechanism is fixed, the interlocking panel 25 rotatably installed concentrically with the drive panel 22, and the locked state of the seat lock mechanism are released. The pushing member 23 is rotated by about 90 ° and then pushed by the pushing member 23 to be 180 °.
Origin position d counterclockwise and clockwise over the angular range of
The driven member 30 that turns while avoiding the rotation is fixed, and the drive board 2
A seat turntable 29 which is connected to the seat 1 in a concentric state with 2.
A pair of reversal completion sensors 34A and 34B for detecting completion of reversal of the seat 1 to the counterclockwise rotation end and the clockwise rotation end,
A pair of dog position sensors 3 for detecting the position of the dog 28
5A and 35B are provided.

Therefore, the seat 1 is controlled by controlling the rotating operations of the drive plate 22, the interlocking plate 25, and the seat turntable 29.
And a state in which the drive panel 22 is linked to the interlocking panel 25 and a state in which the drive panel 22 is not linked to the interlocking panel 25, and a state in which the drive panel 22 is linked to and not linked to the seat turntable 29. Since the seat 1 can be turned counterclockwise and counterclockwise by appropriately releasing the locked state of the seat lock mechanism, the turning operation of the seat 1 can be smoothed and stabilized, and the seat turning device can be simplified. It can be made compact and compact.

Further, since no electromagnetic clutch or solenoid is used for the mechanism for driving the seat or the mechanism for unlocking the seat lock mechanism, the seat reversing device can be made lightweight and the electromagnetic clutch or solenoid can be used. It is possible to eliminate the generation of noise accompanying the operation of.

Further, when the seat 1 is completely turned over, the pushing member 2 is pushed.
3 returns to the origin position d, and the driven member 30 when the seat is turned over
So as to turn without passing through the origin position d.
Since the origin position d and the turning range of the driven member 30 are set, the driven member 30 is pushed so that the turning motion of the driven member 30 is not transmitted to the pushing member 23 when the seat 1 is inverted manually. It can be turned independently of the moving member 23.

Therefore, when the seat 1 is manually reversed, the rotational movement of the seat 1 is transmitted to the mechanism for automatically reversing the seat 1 and the problem that the reversing operation force for reversing the seat 1 increases can be eliminated. .

[Brief description of drawings]

FIG. 1 is a side view of a seat reversing device according to an embodiment of the present invention.

FIG. 2 is a plan view of a seat reversing device.

FIG. 3 is a side view of a main part of the seat reversing device.

FIG. 4 is a perspective view of a drive board, an interlocking board, and a seat turntable.

[Fig. 5] A state in which the seat is rotated to the clockwise rotation end, and
FIG. 6 is a plan view of a main part showing a state of being rotated to a counterclockwise rotating end.

FIG. 6 is an explanatory diagram sequentially showing the operation when the seat is turned counterclockwise.

FIG. 7 is an explanatory diagram sequentially showing the operation when the seat is turned clockwise.

FIG. 8 is an explanatory diagram sequentially showing the operation when the counterclockwise reversing operation is performed in the state where the seat is reversed to the counterclockwise rotating end.

9 is a time chart corresponding to FIG.

FIG. 10 is a time chart corresponding to FIG.

FIG. 11 is a time chart corresponding to FIG.

[Explanation of symbols]

 1 Seat 22 Drive Panel 23 Pushing Member 25 Interlocking Board 26 Through Holes 27A and 27B Hole Edge 29 Seat Rotating Plate 30 Follower Member

Claims (2)

[Claims] 1. A horizontal rotation within a range between a counterclockwise rotation end that is rotated 180 ° counterclockwise from a clockwise rotation end and a clockwise rotation end that is rotated 180 ° clockwise from the counterclockwise rotation end. When the seat is turned over, the pushing member that turns around the seat rotation axis is fixed, and the drive panel that is driven to rotate counterclockwise and clockwise by the motor whose rotation can be controlled and the seat lock mechanism are unlocked. The lock releasing means and the seat lock mechanism are released from the locked state and are pushed by the pushing member to avoid the turning start position of the pushing member in the counterclockwise and clockwise directions over an angle range of 180 °. A seat reversing device, comprising: a seat turntable having a swivel driven member fixed thereto and coupled to a seat concentrically with the drive plate; and a sensor for detecting unlocking of a seat lock mechanism. 2. The lock releasing means is a dog fixed to an interlocking board which is rotatably linked to the drive board and is installed concentrically with the drive board. Seat reversing device.