JPH0614967A - Rotary table device - Google Patents

Abstract

PURPOSE:To give proper stimulation to the muscle of a patient suffering from lumbago, etc., and exert a high therapeutic effect by applying the motions in the radial direction and the thrust direction in addition to the rotational motion to a rotary table mounted by the patient, CONSTITUTION:A rotary shaft 6 is erected and arranged at the center section of a cylindrical casing 4, and a rotary table 8 to be mounted by a patient is fitted at the upper section of the rotary shaft 6. The rotary shaft 6 is rotatably supported by a thrust magnetic bearing 21 and a pair of radial magnetic bearings 22, 23, and a motor 24 rotating the rotary shaft 6 is fitted between the bearings 22, 23. The electromagnet of the thrust magnetic bear 21 is constituted of upper and lower electromagnets 27, 28, and a disk-like target 29 fitted to the rotary shaft 6 is inserted between both electromagnets 27, 28. The displacement quantities of the rotary shaft 6 in the radial direction and the thrust direction are detected, and the motion of the rotary shaft 6 is controlled by the proper combination of the rotational motion, motions in the radial direction and the thrust direction, and conical motion of the rotary shaft 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary table device used for treating and preventing a patient suffering from low back pain.

[0002]

2. Description of the Related Art As a so-called health device or treatment device used for treating a patient suffering from low back pain or stiff shoulder and preventing recurrence after healing, a patient is placed on a rotary table and the rotary table is mounted by a vertical axis. A rotary table device configured to rotate has been proposed. According to this device, since the patient is rotated together with the turntable, appropriate stimulation is applied to the muscle of the affected area, thereby exerting a therapeutic effect.

[0003]

However, in the conventional rotary table device as described above, the rotary shaft and the rotary table are erected vertically and only rotate at a fixed position at a low speed.

As described above, only by rotating the rotary table around the rotation center at the fixed position, the kinds of stimulation to the affected part muscles of the patient are limited and uniform,
Therefore, there was a problem that a high degree of therapeutic effect could not be expected.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a rotary table device capable of exerting a high degree of therapeutic effect by appropriately stimulating the affected muscle of a patient. To do.

[0006]

SUMMARY OF THE INVENTION A rotary table device according to the present invention comprises a rotary shaft, which is rotatably erected and has a rotary table on which a patient can ride, and a thrust magnet which supports the rotary shaft. A bearing and a pair of upper and lower radial magnetic bearings, a motor for rotationally driving the rotary shaft, a displacement sensor means for detecting the radial and thrust displacements of the rotary shaft, and an output signal from the displacement sensor means. Based on the control signal from the compensating device and the output signal from the sensor amplifier, which outputs the control signal for controlling the displacement amount of the rotary shaft based on the target value. , A power amplifier that excites the electromagnets of the magnetic bearings that generate a magnetic attraction force that attracts the rotary shaft, and a rotary motion and a radial motion of the rotary shaft. A signal generator that generates a predetermined signal that is the target value for moving by any combination of the thrust direction movement and the conical movement, and outputs the signal to the motor and the compensator. is there.

Further, the gap on one side of the thrust magnetic bearing is 0.3 to 2.0 mm, the gap in the radial direction of the radial magnetic bearing is 0.3 to 2.0 mm, and the rotational speed of the rotary table is 0. It is preferable that the rotation axis is 01 to 1.0 rps, and the movement cycle of the rotating shaft is 0.01 to 1.0 Hz.

Further, if the muscle current of the patient is measured by a detector and the waveform of the output signal of the signal generator is controlled based on the output signal from the detector, the therapeutic effect is further improved.

More preferably, if a handrail that can be held by the patient on the turntable is attached to the turntable, the safety for the patient is further improved.

[0010]

According to the present invention, the gap on one side of the lower thrust magnetic bearing and the radial gap between the pair of upper and lower radial magnetic bearings have predetermined dimensions. In addition to the rotational movement, the shaft can perform not only radial movement and thrust movement but also conical movement, and these movements can be arbitrarily combined.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the entire structure of a rotary table device 1 according to the present embodiment, and FIG. 2 shows the structure of a casing and a rotary table attached to the casing. As shown in the drawing, a casing 4 having a flat plate-shaped bottom portion 2 and a cylindrical side wall 3 which is vertically arranged integrally with the bottom portion 2 is placed on a floor 5. At a central position C in the vertical direction within the casing 4, a rod-shaped rotating shaft 6 is erected so as to be rotatable in one direction or the forward and reverse directions. A rotary table 8 on which one or two patients 7 can stand upright is attached to the upper part of the rotary shaft 6, and the rotary table 8 rotates together with the rotary shaft 6. The turntable 8 has a disk-shaped floor 9 on which the patient 7 rides.
Further, a wall 10 is provided on the outer peripheral edge of the floor portion 9 so as to be erected over the entire circumference so as to prevent the patient 7 from falling from the rotary table 8. Furthermore, if a handrail 11 is laid across the upper end of the wall 10 so that the patient 7 standing on the floor 9 can be grasped so as not to fall, the patient 7 may accidentally fall and be injured. It is preferable for safety measures.

The rotating shaft 6 is supported by a thrust magnetic bearing 21 in the vertical direction, and a pair of radial magnetic bearings 2 are provided.
It is supported by 2, 23 in the radial direction. The thrust magnetic bearing 21 is arranged in the lower part of the casing 4,
The pair of radial magnetic bearings 22 and 23 are located above the thrust magnetic bearing 21 and are arranged in the central portion and the upper portion of the casing 4. A motor 24 is arranged between the radial magnetic bearings 22 and 23 to drive the rotary shaft 6 to rotate in one direction or in the forward and reverse directions. Rotor 25 of this motor 24
Is attached to the rotary shaft 6, and the stator 26 for rotating the rotor 25 is attached to the side wall 3 of the casing 4.

The electromagnet of the thrust magnetic bearing 21 is composed of a lower electromagnet 27 and an upper electromagnet 28.
A disc-shaped target 29 attached to the rotary shaft 6 is disposed between the shafts 7 and 28. The attraction force generated by the magnetic force of both electromagnets 27, 28 causes the target 29
Is supported between both electromagnets 27 and 28 in a non-contact state. A gap on one side of the thrust magnetic bearing 21, that is, a gap d1, d between the target 29 and both electromagnets 27, 28.
2 is preferably 0.3 to 2.0 mm.

A plurality of electromagnets 30 of each radial magnetic bearing 22, 23 (for example, four for each bearing 22, 23) are evenly arranged in the circumferential direction on the inner peripheral surface of the side wall 3 of the casing 4. There is. The target 31 attached to the rotary shaft 6 has the electromagnets 3 at the center C of the array of the electromagnets 30.
It is rotatably supported in a non-contact state by a suction force generated by 0. The radial gap d3 between the radial magnetic bearings 22 and 23 is preferably 0.3 to 2.0 mm.

As described above, since the rotating shaft 6 is supported in the casing 4 in a non-contact state, when the motor 24 is controlled or the current value to each electromagnet 27, 28, 30 is changed. The rotation speed and the suction force with respect to the rotating shaft 6 change. As a result, the rotary shaft 6 rotates, moves in the radial direction (radial direction), and in the thrust direction (center axis direction).
And any conical movement that revolves while drawing a conical shape. The displacement amount of the rotating shaft 6 which makes this movement in the radial direction and the thrust direction is detected by the displacement sensor means. The displacement sensor means is erected on the upper surface 2a of the bottom portion 2 of the casing 4 and detects the position of the lower end surface 32 of the rotary shaft 6 to detect the displacement amount in the thrust direction. Of the radial magnetic bearing 22 and a second displacement sensor 35 which is mounted in the vicinity of each electromagnet 30 and detects the displacement amount in the radial direction by detecting the position of the rotating shaft, and the upper radial magnetic bearing 23.
And a third displacement sensor 36 which is attached in the vicinity of each electromagnet 30 and detects the displacement amount in the radial direction by detecting the position of the rotating shaft.

Detection signals output from the first to third displacement sensors 33, 35 and 36 as displacement sensor means are processed by the sensor amplifiers 37 for the bearings 21, 22 and 23. An output signal from the sensor amplifier 37 is sent to a compensating device 38, and the compensating device 38 outputs a control signal for controlling the displacement amount of the rotary shaft 6 based on the inputted signal and a predetermined target value. Output to the amplifier 39. This power amplifier 39 is based on the input control signal, and the electromagnets 27, 2 of the magnetic bearings 21, 22, 23, respectively.
Exciting 8 and 30. Excited electromagnets 27, 28,
The reference numeral 30 generates a magnetic attraction force for attracting the targets 29 and 31 of the rotary shaft 6 to hold the rotary shaft 6 in a desired posture in a non-contact state.

On the other hand, the signal generator 40 for generating a therapeutic signal has a rotating shaft 6 rotated by a motor 24.
Motor 24 and each electromagnet 27, 28, 3 in order to move the motor 24 in any combination of one or more of rotational, radial, thrust and conical motion.
Predetermined signals having respective target values of 0 are generated.
The signal generated by the signal generator 40 is output to the inverter 41, and the output current value from the inverter 41 to the motor 24 is controlled, whereby the rotation speed of the motor 24 that drives the rotary shaft 6 becomes a desired value. Change. In addition, the signal from the signal generator 40 is output to each compensator 38 for each bearing 21, 22, 23 and is used as the target value of the control signal in each compensator 38.

The rotation speed of the rotary table 8 rotated by the rotary shaft 6 is 0.01 to 1.0 rps (the rotation speed per second), and the cycle of the above-mentioned movement of the rotary shaft 6 is 0. 0.01 to 1.0 Hz is preferable from the viewpoint of therapeutic effect.

Further, in the apparatus 1 of the present embodiment, when the patient 7 suffers from low back pain, a pair of electrodes 42 are attached to the waist, and a weak electric current is applied to the muscles of the waist through the electrodes 42 to provide a predetermined muscle. The voltage is detected by the detector 43, and the signal from this detector 43 is output to the signal generator 40. The signal generator 40 controls the waveform of the output signal based on this signal.

In the rotary table device 1 configured as described above, the motor 24 is controlled by the output signal from the signal generator 40 to drive the rotary shaft 6 to rotate at a desired number of revolutions. Rotary table 8
Rotates slowly around the central axis C (arrow R) and performs a so-called spin motion. The conventional rotary table device is
As already described, the rotary table rotates only around the vertical line L in FIG. 3 at a fixed position, and therefore, the type of muscle stimulation to the patient is limited and uniform. On the other hand, in the rotary table device 1 according to the present embodiment, since the output signal from the signal generator 40 is sent to each compensator 38 of each magnetic bearing 21, 22, 23, it passes through the power amplifier 39. Thrust magnetic bearing 2
The electric current to the electromagnets 27 and 28 of No. 1 changes, and the rotating shaft 6 moves in the thrust direction (arrow Z in FIG. 3). Similarly, the signal from the signal generator 40 changes the current to each electromagnet 30 of the pair of radial magnetic bearings 22 and 23 via each power amplifier 39, and the rotary shaft 6 moves in the radial direction ( For example, the so-called conical movement (arrow P) in which the center C revolves conically around the vertical line L (arrows X and Y) is performed. Further, by a signal from the signal generator 40, it is possible to freely perform any combination of one or more of the rotational movement, the radial movement, the thrust movement and the conical movement. This allows patient 7
It is possible to give appropriate stimulation to the muscles of the affected area causing back pain, stiff shoulder, etc., and early treatment can be performed. In this case, the muscle voltage / muscle current of the patient 7 is detected by the detector 43 and the result is output to the signal generator 40. Therefore, an optimal physical load should be applied to the muscle according to the muscle condition. The rotary table 8 moves,
A higher therapeutic effect can be achieved.

In the drawings, the same reference numerals indicate the same or corresponding parts.

[0022]

Since the present invention is constructed as described above,
The rotary table moves with any combination of rotary motion, radial motion, thrust motion, and conical motion, which gives various kinds of moderate stimulation to the patient's muscles on the rotary table and has a high therapeutic effect. Exert.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a rotary table device according to an embodiment of the present invention.

FIG. 2 is a front view showing a casing and a rotary table attached to the casing in the configuration shown in FIG. 1, and a part thereof is shown in section.

3 is an explanatory diagram showing an operation of the rotary table device shown in FIG. 2. FIG.

[Explanation of symbols]

 6 rotary shaft 7 patient 8 rotary table 11 handrail 21 thrust magnetic bearing 22, 23 radial magnetic bearing 24 motor 27, 28, 30 electromagnet 33, 35, 36 displacement sensor means 37 sensor amplifier 38 compensator 39 power amplifier 40 signal generator 43 Detectors d1 and d2 Gap on one side d3 Radial gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yukio Ikeda 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (72) Inventor Seio Shiozawa 11-1 Haneda-Asahi-cho, Ota-ku, Tokyo (72) Inventor Hiroyoshi Yamamoto 11-11 Haneda-Asahicho, Ota-ku, Tokyo Inside EBARA CORPORATION (72) Inventor Shiro Natori 11-11 Haneda-Asahi-cho, Ota-ku, Tokyo Inside EBARA CORPORATION ( 72) Inventor Kunihiko Hirano 11-11 Haneda Asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (72) Inventor Daisuke Inoue 11-1 Haneda-Asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (72) Shunsuke Hayashi 11-11 Haneda-Asahicho, Ota-ku, Tokyo Ebara Corporation (72) Inventor Toshi Shirasawa 11-11 Haneda-Asahicho, Ota-ku, Tokyo EBARA CORPORATION (72) Inventor Shigeharu Takehigu 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (72) Inventor Kiyoshi Miyagawa 11-11 Haneda-Asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (72) Invention Person Aichiro Kanichiro 11-1 Haneda-Asahicho, Ota-ku, Tokyo Inside EBARA CORPORATION

Claims (4)

[Claims] 1. A rotary shaft which is rotatably provided upright and has a rotary table on which a patient can ride, a thrust magnetic bearing supporting the rotary shaft and a pair of upper and lower radial magnetic bearings, and the rotary shaft. A rotationally driving motor, displacement sensor means for detecting the radial and thrust displacements of the rotary shaft, a sensor amplifier for processing the output signal from this displacement sensor means, and an output signal from this sensor amplifier. A compensator that outputs a control signal that controls the displacement of the rotary shaft based on a target value that is input, and a magnetic attraction force that attracts the rotary shaft is generated based on the control signal from the compensator. A power amplifier that excites the electromagnets of the magnetic bearings, and the rotary shaft, among rotary motion, radial motion, thrust motion, and conical motion. Generates a predetermined signal to be the target value for moving in any combination,
A rotary table device comprising: the motor and a signal generator that outputs the signal to the compensator. 2. The thrust magnetic bearing has a one-side gap of 0.3 to 2.0 mm, the radial magnetic bearing has a radial gap of 0.3 to 2.0 mm, and the rotary table has a rotational speed of 0. 2. The rotary table device according to claim 1, wherein the rotary shaft device has a rotation speed of 0.01 to 1.0 rps and a cycle of the movement of the rotary shaft is 0.01 to 1.0 Hz. 3. The muscle current of the patient is measured by a detector, and the waveform of the output signal of the signal generator is controlled based on the output signal from the detector. The rotary table device described. 4. The rotary table device according to claim 1, wherein the rotary table is provided with a handrail that can be held by a patient on the rotary table.