JPH08197990A - Seat chair having gyro control - Google Patents

Abstract

PURPOSE: To restain vibration caused by acceleration and deceleration, and improve comfortableness to ride in by incorporating a gyro damping device into a chair main body rotatably installed in a horizontal plane. CONSTITUTION: In a condition where a rotary position of a chair main body of a seat chair having gyro control mounted on a bus, is set in the advancing direction of the bus, the shaft 12b direction of a gimbal 12 turns in the advancing direction of the bus. Therefore, in a condition where a high speed rotaty body 12 is driven in rotation in the B direction at constant high speed, and when the gimbal 12 rotates at high speed in the C direction by a servomotor 12 and a seat main body is ideally supported at one point to a floor through a rotary mechanism, even if a posture of the bus changes, the relative positional relationship between the chair main body and the floor changes so that the direction of rotary shafts 12a and 12b of the gimbal 12 in a high speed rotating condition always turns in the constant direction. Therefore, even if the floor of the bus vibrates more or less, the vibration is restrained from being transmitted to the chair main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat / chair mounted on a vehicle such as a train or a bus, and particularly to a gyro which is improved in the sitting comfort of a chair which is not directly fixed to the floor such as a rotating chair. Controlled seating chair.

[0002]

2. Description of the Related Art Generally, seats and chairs mounted on vehicles such as trains and buses that mainly transport passengers are found in the traveling direction of long-distance trains and buses, and in suburban trains. It is fixed in the direction opposite to the traveling direction such as one side of the seat facing like a box seat, or in the direction orthogonal to the traveling direction of the bench seat etc. seen in trains operating in the city center etc. There is.

However, among sightseeing buses other than commuter trains and commuter buses, and trains that operate in specific sightseeing areas, seat chairs are used to enjoy conversations with fellow passengers while traveling and to take a slow view of the outside scenery. There may be a swivel chair that allows passengers to rotate in any direction.

[0004]

However, the rotatable seat chair mounted on the vehicle as described above also has the following problems to be improved. That is, such a swivel chair is generally attached to the floor via a rotating mechanism. This rotating mechanism needs to support not only the weight of the chair body but also the weight of passengers, and since the chair body has a reclining structure, it must also endure the stress from the diagonal direction due to the movement of the center of gravity.

Therefore, it is larger and more robust than the rotating mechanism used in general office chairs. In addition, it is necessary for passengers to easily rotate the chair body with one hand. Therefore, compared with a seat chair that is completely fixed to the floor, it is easy to rotate around the rotation axis of the chair body, and there is some play (backlash) in the left-right and front-back directions.

This means that trains and buses equipped with seats and chairs accelerate. When decelerating or swaying to the left or right, the seat chair cannot follow the movement of the floor of the train or bus, and front rolling phenomenon, rolling phenomenon or vibration occurs. As a result, passenger comfort is reduced.

There is also a chair in which a simple table for placing food and drinks is incorporated in an armrest of a chair body, and a mechanism is adopted in which a passenger can pull out the simple table to a position above the knee when necessary. In the chair in which such a simple table is incorporated, when the above-mentioned subtle forward rolling phenomenon or rolling phenomenon occurs, the food and drink placed on the simple table vibrates and easily falls.

The present invention has been made in view of such circumstances, and even if it can be easily rotated, it is possible to suppress subtle vibrations to passengers caused by acceleration and deceleration, and improve riding comfort. An object is to provide a seat chair with a gyro control.

[0009]

In order to solve the above problems, a seat chair with gyro control according to the present invention is a chair body rotatably attached to a floor surface of a moving body in a horizontal plane via a rotating mechanism. , A gyro damping device built into the chair body, a seating detection sensor that detects when a person is seated in the chair body, a running detection sensor that detects the running state of the moving body, and a seating detection sensor And a gyro vibration damping device drive control means for driving the gyro vibration damping device in a state where the traveling detection sensor detects the traveling state.

[0010]

In the gyro-controlled seat chair configured as described above, the gyro control is installed in the chair body rotatably mounted on the floor surface of a moving body such as a train or a bus in a horizontal plane through a rotating mechanism. Shaker is incorporated.

Next, the operation of the gyro damping device will be described.
As is well known, a gyro has a basic principle that "a rotating body rotating at high speed always maintains the same posture in a three-dimensional space unless an external force is applied." Therefore, if the support frame that supports the rotating body that rotates at high speed is fixed to the chair body that is rotatably attached, the orientation (posture) of the chair body does not change even if the orientation of the moving body changes.

As a result, even if the moving body itself vibrates due to acceleration / deceleration, the vibration is not transmitted to the chair body, and the riding comfort is improved. Further, in the present invention, the gyro vibration damping device is driven when the seating detection sensor detects the passenger's seated state and the traveling detection sensor detects the traveling state.

That is, when the moving body is in a stopped state or the customer is not seated in the chair body, the gyro damping device stops functioning. Therefore, in this state, the passenger can easily rotate the chair body in the required direction.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (a) is a front view of a seat chair with gyro control mounted on a bus, and FIG. 1 (b) is a sectional view of the seat chair with gyro control of FIG. 1 (a) taken along the line AA '. It is a sectional side view in the case.

An annular rotating mechanism 2 utilizing a bearing is fixed to a floor 1 of the bus. A chair body 3 is attached to the upper surface of the rotating mechanism 2. The chair body 3 is roughly divided into a leg portion 4 fixed to the rotation mechanism 2, a seat (seat) 5 provided on the leg portion 4, a backrest 6, and
It is composed of armrests 7a and 7b on both sides.

A simple table 8 for placing food and drink is incorporated in one armrest 7a. While the passenger is seated on the seat (seat) 5, the simple table 8 is rotated to a horizontal position and locked by a locking portion (not shown).

A gyro damping device 9 is attached to the lower wall 4a in the leg portion 4. The gyro damping device 9 is constructed as shown in FIG. 2, for example. Lower wall 4a of leg 4
The frame 11 is fixed on the support member 10 fixed to the frame 11. The shafts 12a and 12b of the gimbal 12 are pivotally supported on the free ends 11a and 11b of the frame 11.

A servomotor 14 is attached to one shaft 12b through a reduction gear 13. Furthermore, the shaft 12
A tachometer (encoder) 15 is attached to the tip of the. The gimbal 12 includes the free ends 11a and 11 of the frame 11.
It is rotatably supported by b and also supports both shafts 17a and 17b of the high-speed rotating body 16. A high-speed rotation motor 18 is attached to one shaft 17a of the high-speed rotation body 16.

Gyro-vibration damping device 9 constructed in this way
When the power of the device is turned on, the gimbal 12
The high-speed rotating body 16 located at the center pivoted on is driven to rotate in the direction of arrow B at a constant high speed by a high-speed rotating motor 18. On the other hand, the free end 11 of the frame 11
The gimbal 12 pivotally supported by a and 11b is a servo motor 1
4, rotation control is performed in three states of "stopped state" and "low speed rotation" and "high speed rotation" indicated by the arrow C direction.

When the rotational position of the chair body 3 is set in the moving direction of the bath, the axis 12b of the gimbal 12 is oriented in the moving direction of the bus. Therefore, in a state where the high-speed rotating body 16 is rotationally driven at a constant high speed in the arrow B direction, and the gimbal 12 is "high-speed rotating" in the arrow C direction by the servomotor 14, and the seat body 3 Is ideally supported on the floor 1 via the rotating mechanism 2 at one point, even if the posture of the bus changes, the rotating shaft 1 of the cymbal 12 in the high-speed rotating state.
The relative positional relationship between the chair body 3 and the floor 1 changes so that the directions of 2a and 12b always face a fixed direction.

Therefore, even if the floor 1 of the bus vibrates to some extent, the vibration is suppressed from being transmitted to the chair body 3. However, since the rotating mechanism 2 has a certain amount of friction and the chair body 3 is not ideally supported, vibration cannot be completely blocked. Therefore, it suffices to rotate the gimbal 12 at a high speed so as to obtain a rotational moment of inertia that overcomes this frictional force.

Further, as shown in FIG. 1 (b), the seat (seat) 5 is placed inside the seat (seat) 5 of the chair body 3.
Mass sensor 20 for detecting that a person is seated in
Is buried. Further, a vibration sensor 21 for detecting that a person is seated on a seat (seat) 5 is embedded in the backrest 6 of the chair body 3.

FIG. 3 is a block diagram showing a schematic configuration of a control circuit for driving and controlling the gyro vibration damping device 9. An amplifier 24 outputs the detection signals of a speedometer 22 as a travel detection sensor for detecting the speed of the bus, the vibration sensor 21, the mass sensor 20, and an angle sensor 23 for detecting a posture angle θ with respect to the traveling direction in the chair body 3. Each A after being amplified
It is converted into a digital value that can be handled by a computer by the / D converter 25 and is input to the control unit 26.

The control unit 26 is composed of a kind of microcomputer, and drives and controls the gyro damping device 9 by the detection signals and the timer signal from the timer circuit 27.

The timer circuit outputs a timer signal for maintaining the high (H) level for a predetermined delay time T _SH from the time when the speed V detected by the speedometer 22 shifts from the running state to the stopped state.

Each motor 14 output from the control unit 26,
The drive signal for 18 is converted into an analog signal by the D / A converter 28 and then input to each drive circuit 29, 30.
The detection speed ω of the servo motor 14 is input to the drive circuit 29 of the servo motor 14 from the tachometer (encoder) 15.

Next, the operation of the control unit 26 will be described. The control unit 26 detects the detection signal of the vibration sensor 21 or the mass sensor 2
When the mass signal of 0 becomes equal to or larger than a predetermined value, it is determined that the passenger is seated in the chair body 3. Also, speedometer 2
When the speed V detected in 2 shows a value other than [0], it is determined that the bus is in a traveling state.

Further, the control unit 26 drives and controls the servo motor 14 through the drive circuit 29 into three types of "stop state", "low speed rotation", and "high speed rotation" as described above. Next, the actual operation of the control unit 26 will be described using the time chart shown in FIG.

At time t ₀ , when the driver gets on the bus in the garage and starts the engine, power is supplied to the control circuit shown in FIG. 2 and the control unit 26 starts control. When the power is turned on, the control unit 26 activates the high-speed rotation motor 18 via the drive circuit 30 to rotate the high-speed rotating body 16 at a constant high speed. At the same time, the control unit 26 instructs the drive circuit 29 to perform “low speed rotation”. Drive circuit 29
Is a "slow rotation" preset for the servomotor 14 using the detected speed ω obtained from the tachometer (encoder) 15.
The rotation is controlled to the low speed ω _L corresponding to.

In this state, since the rotation speed ω of the gimbal 12 is low, the gyro damping device 9 hardly exerts its damping function. Then, even if the passenger sits on the chair body 3 at time t ₁ , the servo motor 14 still maintains the “low-speed rotation” state. Then, at time t _{2, when the} passenger sits on the chair body 3 and the bus starts traveling, the speedometer 22
Since the detected speed V of V is a value other than [0], both the [running state] and the [seating state] are turned on, and the control unit 26 instructs the drive circuit 29 to perform "high speed rotation". .

The drive circuit 29 is a tachometer (encoder) 15
The servo speed of the servomotor 14 is controlled to a low speed ω _H corresponding to a preset “high speed rotation” by using the detected speed ω obtained from In this state, since the rotation speed ω of the gimbal 12 is high, the gyro vibration damping device 9 exerts a sufficient vibration damping function.

Therefore, in this state, the floor 1 of the bus is
Even if the vehicle vibrates to some extent, the vibration is suppressed from being transmitted to the chair body 3. As a result, passenger comfort is improved.

Then, at time t _3, for example, when the bus stops for a short time T _{S due} to a bus stop or a signal, the detected speed V is temporarily in the [0] state, but the detected speed V is [0]. The timer signal output from the timer circuit 27 rises at the timing of transition to and falls after the grace time T _{SH has} elapsed.

The control unit 26 controls the timer signal to be high (H) even if the detected speed V temporarily drops to [0].
When the level is maintained, the servo motor 14 is maintained in the [high speed rotation] state. Therefore, when the vehicle stop time T _S is shorter than the grace time T _SH , the gyro damping device 9 maintains the damping function.

Therefore, even if the vehicle stops at the bus stop or at the signal for a short time T _S , the riding comfort does not deteriorate.
Further, at time t ₄ , for example, when the passenger stops at the bus stop and the passenger gets up from the chair body 3 and gets off from the bus,
Since the detection signal of the mass sensor 20 becomes [0], the control unit 26 unconditionally instructs the drive circuit 29 to perform “low speed rotation”. As a result, the damping function of the gyro damping device 9 does not work on the chair body 3 in which no passenger is seated.

Then, at time t _{5, when the} customer gets in at the next bus stop and sits down on the chair body 3, this time t ₅
Is during the high [H] level period of the timer signal, the servo motor 14 immediately shifts to [high speed rotation], and the vibration damping function normally starts.

Further, when the bus arrives at the stop at the end point at time t ₆ and stops at this stop for a long time, even if the passenger does not get off, the grace time T of the timer signal is increased.
_At time t _{7 when SH} has elapsed, the servo motor 14 shifts to [low speed rotation].

When the driver stops the engine at time t ₈ , the power supply to the control circuit shown in FIG. 2 is cut off and both motors 14.18 are stopped. In the seat chair with gyro control configured as described above, since the gyro damping mechanism 9 is incorporated in the leg portion 4 of the chair body 3, even if the chair body 3 is rotatable via the rotation mechanism 2. Floor 1
Even if it is attached to the gyro damping mechanism 9
With the vibration damping function of 1, the transmission of vibrations and sway caused by the acceleration braking operation and vibrations of the bus to the chair body 3 is significantly suppressed. Therefore, the riding comfort of passengers can be improved.

Further, when the passenger is not seated in the chair body 3 or the bus is stopped for the grace time T _SH or more, the damping function of the gyro damping mechanism 9 is automatically canceled. Unnecessary power consumption can be suppressed, and a passenger can stand up from the chair body 3 and easily change the direction of the chair body 3 with a small force.

[0040]

As described above, in the seat chair with gyro control according to the present invention, the gyro damping is provided in the chair body rotatably attached to the floor surface of the moving body through the rotation mechanism in the horizontal plane. The device is incorporated. Therefore, even with a chair that can be easily rotated, it is possible to suppress subtle vibrations to passengers caused by acceleration and deceleration, and to improve riding comfort significantly.

[Brief description of drawings]

FIG. 1 is a front view and a side sectional view showing a schematic configuration of a seat chair with gyro control according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a gyro vibration control device incorporated in the chair of the embodiment.

FIG. 3 is a block diagram showing a control circuit of the gyro vibration control device.

FIG. 4 is a time cheat showing the operation of the chair of the embodiment.

[Explanation of symbols]

1 ... Floor, 2 ... Rotation mechanism, 3 ... Chair body, 4 ... Leg part, 5 ...
Seat, 6 ... Backrest, 7a, 7b ... Armrest, 7 ... Simple table, 9 ... Gyro vibration control device, 11 ... Frame, 12
... gimbal, 14 ... servo motor, 16 ... high-speed rotating body,
18 ... High-speed rotation motor, 20 ... Mass sensor, 22 ... Speedometer, 26 ... Control unit

Claims (1)

[Claims] 1. A chair body rotatably attached to a floor surface of a moving body through a rotation mechanism in a horizontal plane, a gyro vibration damping device incorporated in the chair body, and a person attached to the chair body. A seating detection sensor that detects that the user is seated, a travel detection sensor that detects a traveling state of the moving body, the seating detection sensor detects a seated state and the travel detection sensor detects a traveling state, A seat chair with gyro control, comprising: a gyro vibration control device drive control means for driving the gyro vibration control device.