JPH04353035A - Rotating device of seat for vehicle - Google Patents

Abstract

PURPOSE:To constitute a mechanism which permits automatic rotation of a seat for vehicle and manual rotation, ensure the safety of passengers against the mechanism, and prevent the seat and a load from being damaged and a motor from being seized in advance. CONSTITUTION:A rotating base frame 4 is supported on a fixed base frame 2 through a rotating support mechanism 3 to secure a seat on the rotating base frame 4. A driving mechanism 7 consists of the first motor 20 and a reduction gear 21 to connect the output shaft 22 of the reduction gear 21 to the rotary disc 12 of the rotating support mechanism 3. A slip clutch such as a friction clutch plate is provided inside the reduction gear 21 to release the connection of the rotating support mechanism with the driving mechanism 7 by action of the slip clutch if a passenger or a load catches in a space between adjacent seats or the seat and an inner wall, and torque higher than a prescribed one works upon the output shaft 22.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a rotating device for automatically changing the direction of vehicle seats installed in railway vehicles, buses, passenger ships, etc.

0002

BACKGROUND OF THE INVENTION Various devices have been proposed in the past for automatically rotating the seats of railway vehicles in the direction of travel at the starting station. The automatic seat rotation device in the publication includes:
A mechanism is provided that also allows manual rotation of the seat.

0003

[Problems to be Solved by the Invention] However, according to the conventional automatic seat rotation device, the mechanism that enables manual rotation is built into the rotation support mechanism of the seat, making the configuration of this part very complicated. There was a problem. In addition, when automatic rotation occurs, there is a possibility that passengers or luggage may become trapped between adjacent seats or between seats and inner walls. It is also necessary to provide a means to prevent the motor from seizing.

SUMMARY OF THE INVENTION An object of the present invention is to easily construct a mechanism that enables not only automatic rotation but also manual rotation of a vehicle seat, and to use the mechanism to ensure the safety of passengers.
To provide a rotation device for a vehicle seat that can be useful for preventing damage to seats and luggage and seizure of a motor.

[0005]

[Means for Solving the Problems] In order to solve the above-mentioned problems, a rotating device for a vehicle seat according to the present invention includes: a fixed underframe installed on the floor of a vehicle; a rotating underframe to which the seat is attached; A rotary support mechanism rotatably supports a rotary underframe on a fixed underframe, and a drive mechanism including a motor that drives the rotary underframe via this rotation support mechanism, and a slip clutch is provided in the drive mechanism. It consists of

[0006] Here, the above-mentioned "vehicle seats" are, for example, railway vehicle seats in which a large number of seats are automatically rotated all at once by remote control, or seats in which each seat is automatically rotated in a desired direction by a button operation by a passenger. Examples include seats for tour buses. Examples of the "drive mechanism" include a combination of a motor and a speed reducer, or a geared motor with a built-in speed reduction gear. As the above-mentioned "sliding clutch", a friction clutch plate that transmits rotation by friction and cuts off rotation by sliding can be used. In addition to this, a ball clutch or the like that interrupts rotation by engagement of a ball and a recess can also be used. . The installation location of the "slip clutch" is not particularly limited as long as it is between the motor and the output shaft of the reducer, but for example, the "slip clutch" may be installed between the worm wheel of the reducer and its output shaft. be able to.

[0007]

[Operation] In the vehicle seat rotation device of the present invention, during automatic rotation, the rotation of the motor is transmitted to the rotating underframe via the slip clutch and the rotation support mechanism, and the seat changes direction as the rotating underframe rotates. be done. During this automatic rotation, if a passenger or luggage is caught between adjacent seats or between a seat and the inner wall, the power of the drive mechanism is cut off by the action of the slip clutch, so the rotating underframe will not be forced to rotate. The safety of passengers is ensured, and
Damage to seats and luggage and seizure of the motor are prevented. During manual rotation, the rotation support mechanism and drive mechanism are disconnected by the slip clutch and the motor does not rotate, so the seat can easily change direction with a relatively small force. Further, by providing a slipping clutch in the drive mechanism, the rotation support mechanism can be easily constructed with a small number of parts.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a rotating device for a seat in a railway vehicle will be described below with reference to the drawings. Figure 1
As shown in FIG. 1, a fixed underframe 2 is installed on a floor surface 1 of a railway vehicle, and a rotary underframe 4 is rotatably supported on the fixed underframe 2 via a rotation support mechanism 3. A pair of seats 5 are mounted on the rotating platform frame 4, and each seat 5 is provided with a reclining backrest 6. The fixed frame 2 includes a drive mechanism 7 that drives the rotating frame 4 via the rotation support mechanism 3.
A lock release mechanism 8 is installed for unlocking the rotating underframe 4 and the backrest 6 prior to the rotation of the seat 5.

As shown in FIG. 2, the rotation support mechanism 3 includes a fixed disk 10 attached to the upper surface of the fixed frame 2, and a rotary support mechanism rotatably connected to the fixed disk 10 via a ball 11. It is composed of a disk 12. Rotating disk 1
2, the rotary frame 4 is fastened with bolts 13,
A pair of engagement plates 15 having outward recesses 14 are attached to the lower surface of the rotary frame 4. Further, a connecting shaft 18 is provided on the rotary disk 12 by a bolt 16 and protrudes downward through an arm plate 17.

The drive mechanism 7 is composed of a first motor 20 and a reduction gear 21. A joint 23 is inserted into the output shaft 22 of the reducer 21, and a long hole 2 formed in the arm portion of the joint 23 is inserted into the output shaft 22 of the reducer 21.
4 is connected to the connecting shaft 18 of the rotation support mechanism 3. As shown in FIG. 4, the output shaft 22 is supported inside the housing 25 by a pair of upper and lower bearings 26. A worm wheel 28 is rotatably inserted into the output shaft 22 via a bush 27.
is connected to the first motor 20 via a worm (not shown).

The bush 27 is slidably and non-rotatably connected to the output shaft 22 by a key 29, and is biased downward by a disc spring 30. A friction clutch plate 31 serving as a sliding clutch is fixed to the lower surface of the flange of the bush 27, and is pressed against the worm wheel 28 by the biasing force of a disc spring 30. The rotation of the first motor 20 is normally transmitted to the output shaft 22 via the worm wheel 28, the friction clutch plate 31, and the bush 27, and when a torque of more than a predetermined value acts on the output shaft 22, the friction clutch The sliding action of the plate 31 causes the first motor 20 and the output shaft 22 to be disconnected from each other.

As shown in FIG. 2, a pedal 35 and a lever 36 are supported by a pin 34 via a support plate 33 on the fixed frame 2 so as to be able to rotate together, and the pedal 35 is provided with the engaging plate 1.
A trochanter 37 that fits into the recess 14 of the backrest 6 is attached to the lever 36, and a reclining lock mechanism (
A wire 38 is coupled to drive the wire 38 (not shown). The pedal 35 and the lever 36 are biased counterclockwise in FIG. 2 by a spring 39, and when the pedal 35 is depressed against the biasing force, the trochanter 37 is disengaged from the engagement plate 15 and rotates. The seat 5 can be manually rotated together with the underframe 4, and the reclining lock mechanism can be released by a wire 38 to return the backrest 6 from the reclined position.

The unlocking mechanism 8 includes a second motor 41 , and a screw rod 44 is connected to the motor shaft 42 via a coupling 43 . A slide plate 45 is screwed onto the screw rod 44, and the lever 3 is attached to the slide plate 45.
The engager 46 provided at the lower end of the slide plate 45 is in contact with the engager 46 provided at the lower end of the slide plate 45.
7 and 48 are arranged. When the second motor 41 moves the slide plate 45 to the left in FIG. The lock 6 is automatically released, and the unlocked state is detected by the left limit switch 47. Furthermore, when the slide plate 45 is moved to the right in FIG.
5 and the lever 36 are rotated in the opposite direction, the seat 5 and the backrest 6 are automatically locked, and the locked state is detected by the right limit switch 48.

Furthermore, as shown in FIG. 3, the drive mechanism 7
The lock release mechanism 8 is installed in the center of the fixed frame 2, and recesses 49 are provided on both front and rear sides thereof. Therefore, when the heater 50 is installed in the recess 49, or when it is not installed, the passenger in the rear seat can extend his or her legs and enter the recess 49.

FIG. 5 is a block diagram schematically showing the electric circuit of the rotating device of this embodiment. A control box 52 is installed in each fixed frame 2, and the first motor 20 is installed in the control box 52. , a second motor 41, limit switches 47 and 48 for unlocking and lock detection, and limit switches 53 and 5 for detecting the forward and backward rotational positions of the rotary frame 4.
4 (see FIG. 1) are connected. Each control box 52 is connected to an operation panel 55 in the conductor's room or driver's cabin.
5 is provided with a forward rotation switch 56, a reverse rotation switch 57, and a stop switch 58.

Next, the operation of the rotating device of this embodiment constructed as described above will be explained. When a rotation command is output by operating the forward rotation switch 56 or reverse rotation switch 57 on the operation panel 55, first, the second motor 41 of the lock release mechanism 8 is started, and the pedal 35 is activated via the screw rod 44 and the slide plate 45. Then, the lever 36 is rotated, the seat 5 is unlocked, and the backrest 6 from the reclining position is returned to the upright position. When the unlock detection limit switch 47 is turned on, the second motor 41 is stopped, and then the first motor 20 of the drive mechanism 7 is started.

The rotation of the first motor 20 is transmitted to the output shaft 22 via the friction clutch plate 31 of the reducer 21, and as the output shaft 22 rotates, the connection shaft 18 of the rotation support mechanism 3 and the rotation disk 12 are transmitted to the output shaft 22. The rotary frame 4 is rotated through the rotary frame 4. When the rotary frame 4 is rotated 180 degrees, the limit switches 53 and 54 for detecting the rotational position are turned on, and the first motor 20 is stopped in response to the signal, thereby changing the orientation of the seat 5. Ru. In this embodiment, in order to avoid collisions between adjacent seats 5, each seat 5 is divided into two groups, as shown in FIG. The group is controlled to start rotating.

In addition, the second motor 41 is reversed in response to the signals from the limit switches 53 and 54, and the rotor 37 of the pedal 35 engages with the engagement plate 15 to lock the rotary frame 4, and the wire The reclining lock mechanism is set to the activated state via 38. Thereafter, the second motor 4 is activated based on the signal from the limit switch 48 for lock detection.
1 is stopped and automatic rotation is completed.

By the way, during this automatic rotation, if a passenger or baggage is caught between adjacent seats 5 or between seats 5 and inner wall 60 and a torque of more than a predetermined value is applied to the output shaft 22 of the reducer 21. , a slip occurs between the friction clutch plate 31 and the worm wheel 28, and as a result, the first motor 20 and the output shaft 22 are disconnected from each other. Therefore, the power of the drive mechanism 7 is cut off and the rotating underframe 4 is not forced to rotate, ensuring the safety of passengers and preventing damage to the seats 5 (including the rotating support mechanism 3, etc.) and luggage.
Furthermore, seizure of the first motor 20 can be prevented.

On the other hand, when the passenger depresses the pedal 35 to manually rotate the seat 5, the sliding action of the friction clutch plate 31 causes the rotation support mechanism 3 and the drive mechanism 7 to be disengaged, and the first motor 20 and The rotating underframe 4 is rotated while the worm wheel 28 and the like are stopped. For this reason,
Even a child, an elderly person, or a woman can easily change the direction of the seat 5 with a relatively small force. Further, according to this embodiment, since the friction clutch plate 31 is provided on the reducer 21, the clutch function can be easily obtained just by installing the reducer 21, and the rotation support mechanism 3 can be easily obtained by simply installing the reducer 21. It can be easily configured with a small number of parts.

It should be noted that the present invention is not limited to the configuration of the above embodiment, and for example, the drive mechanism 7 may be configured with a geared motor, a ball clutch may be used in place of the friction clutch plate 31, or a friction clutch plate may be used instead of the friction clutch plate 31. 31 or the assembly position of the ball clutch inside the drive mechanism 7, or applying the configuration of the above embodiment to a sightseeing bus seat, the configuration of each part may be modified without departing from the spirit of the present invention. It is also possible to change and embody it as appropriate.

[0022]

[Effects of the Invention] As detailed above, according to the present invention, since the drive mechanism is provided with a slipping clutch, it is possible to easily construct a mechanism that enables not only automatic rotation but also manual rotation of a vehicle seat. At the same time, the mechanism is used to ensure the safety of passengers,
This has an excellent effect in that it can be used to prevent damage to seats and luggage as well as prevention of motor seizure.

[Brief explanation of the drawing]

FIG. 1 is a front view of a seat for a railway vehicle showing an embodiment of the present invention.

FIG. 2 is an enlarged front view of the rotation support mechanism, drive mechanism, and lock release mechanism of FIG. 1;

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a cross-sectional view showing the structure of the reducer in FIG. 2 in detail.

FIG. 5 is a block diagram showing an electric circuit of the rotating device.

[Explanation of symbols]

1 Floor surface
2 Fixed frame 3 Rotation support mechanism
4 Rotating frame 5
seat
7 Drive mechanism 20 First motor
21 Reducer 31 Friction clutch plate

Claims (1)

[Claims] [Claim 1] A fixed frame installed on the floor of a vehicle;
The seat includes a rotating underframe to which a seat is attached, a rotating support mechanism that rotatably supports the rotating underframe on the fixed underframe, and a drive mechanism that includes a motor that drives the rotating underframe via the rotating support mechanism. A rotating device for a vehicle seat, characterized in that the drive mechanism is provided with a slipping clutch.