JPH11161344A - Equipment control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure safety of equipment operation against vibration by supporting the equipment main body by with casters, detecting the movement of the equipment by a sensor, and allowing a control part to control the equipment in response to its detection signal. SOLUTION: Four casters 4 are fitted to leg parts 3 of equipment 1 or equipment main body 2, while wheels 7 of the respective casters 4 are arranged rotatably on shaft parts 5. Then acceleration sensors 10 are fitted to the covers 6 of the casters 4 so as to detect the acceleration of the casters 4 and, for example, an 'A' sensor 10 is arranged on the cover 6 so as to measure vertical acceleration. A 'B' sensor 10, on the other hand, is arranged at the periphery of the cover 6 so as to detect rotation on the shaft part 5. The signals of those 'A' sensor 10 and 'B' sensor 10 are received by the control part to control the equipment 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a countermeasure against vibration of equipment provided with casters such as an earthquake.

[0002]

2. Description of the Related Art Conventionally, medical equipment such as a life support management device such as an artificial dialysis device, an artificial heart-lung machine, and an artificial respiration device,
In response to large vibrations such as earthquakes, controls such as stopping operation were not sufficiently taken. For example, even if the external power supply is cut off, the auxiliary power supply device of the device operates and continues to operate even when it should be stopped. For example, during artificial dialysis, since about 200 ml of blood exists outside the body, it is necessary to automatically stop the device to ensure life safety.

[0003]

<B> It is an object of the present invention to ensure the safety of operation of a device against vibration. <B> The present invention is to secure the safety of operation of a medical device against vibration.

[0004]

SUMMARY OF THE INVENTION The present invention comprises a plurality of casters for supporting a main body of a device, a sensor for detecting the movement of the device, and a control unit for controlling the device by receiving a signal from the sensor. The device control device, or a plurality of casters supporting the main body of the device, a sensor for detecting the movement of the caster, and a control unit that receives the signal of the sensor and controls the device, the device control device, or, In the device control device, the sensor is characterized by detecting a rotational movement around the shaft of the caster or a vertical motion of the caster, the device control device, or in the device control device, the device is a medical device, When the motion of the caster is equal to or more than a predetermined value, the operation of the device is stopped,
It is in the equipment control unit.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

<A> Outline of device control device The device control device is, for example, as shown in FIG.
It controls medical equipment and other equipment 1 such as an artificial respiration apparatus and a life support management apparatus including a heart-lung machine,
The device main body 2 is supported by the casters 4, and the sensor 10 is attached to the device 1 including the casters 4.
Numeral 0 detects a vibration such as an earthquake and performs control such as stopping the operation of the device 1.

<B> Casters For example, four casters 4 are attached to the leg 3 of the device 1 and the device main body 2. The wheel 7 of the caster 4 has a shaft 5
It is arranged rotatably around. The wheels 7 are arranged so as to be able to move up and down along the shaft 5. The shaft portion 5 is located off the center of the wheel 7. The wheel 7 has a shaft 5
Separately rotates around the axle. In the caster 4 having the stopper, the rotation around the axle can be fixed by the stopper. The cover 6 is arranged above the wheels 7. At least one of the casters 4 attached to the device 1 has a stopper, and the device 1 can be fixed by fixing the rotation around the axle with the stopper.

<C> Sensor The sensor 10 detects the motion of the device 1, for example, the motion of the caster 4, and detects the motion such as acceleration, speed, displacement, and force. For this purpose, the sensor 10 may be an acceleration sensor, a speed sensor, a displacement sensor, a weight sensor, or the like that detects a physical quantity such as electromagnetic force, light, resistance, piezoelectricity, and weight. The sensor is attached at a position where the movement of the device 1 can be detected.

In order to detect the acceleration of the caster 4,
For example, as shown in FIG. 2, the acceleration sensor 10 is attached to the cover 6 of the caster 4. The acceleration sensor 10, for example, the A sensor 10 in FIG. 2 is disposed above the cover 6 so that the acceleration in the vertical direction can be measured. The B sensor 10 is arranged around the cover 6 so as to detect rotation around the shaft 5. Further, in order to measure the force applied to the casters 4, for example, the piezoelectric sensor 10 is embedded in the shaft 5 as shown in FIG.

<D> Signals from Sensors Signals from a plurality of sensors 10 are sent to a control unit 12 via a signal line 11 as shown in FIG. Then, the operation of the device main body 2 is controlled. The control of the device main body 2 can safely stop the operation of the device main body 2 by, for example, shutting off the power supply. The signal lines 11 are arranged by various known methods so as not to hinder the movement of the casters 4. For example, the line 11 is made longer to provide a space, or the line 11 is disposed inside the shaft portion 5.

The control of the equipment control device during an earthquake will be described below.

<A> Test environment As a device 1, a dialysis monitor (TR-200M, weight 5)
5 kgf, Toray Medical Co., Ltd.) is installed on the shaking table. The weight of the device 1 is a relatively heavy device 1 of about 30 kgf or more. The device 1 is provided with four casters 4, of which two are provided with stoppers.

As the excitation wave of the shaking table, for example, an excitation wave as shown in FIG. 5 was used using a white wave and an actual ground motion (JR Takatori wave). The white wave is a broadband wave, and is a wave that is often used for a characteristic test of a test object. On the other hand, JR
Takatori wave is one of the few ground motions observed at the seismic intensity 7 area at the ground level at JR Takatori Station in the 1995 Great Hanshin-Awaji Earthquake. FIG.
5A shows an excitation wave in the X direction on the horizontal plane, FIG. 5B shows an excitation wave in the Y direction on the horizontal plane, and FIG. 5C shows an excitation wave in the vertical Z direction.
The horizontal axis of the seismic wave indicates time (seconds), and the vertical axis indicates intensity (gal).
Is represented.

<B> Movement of casters The casters 4 of the equipment 1 placed on the shaking table are caused to move by the seismic motion. When the device 1 supported by the casters 4 on which the stoppers work is subjected to a large vibration, the other casters 4 float with one or two of the casters 4 grounded. At this time, the shaft 5 that moves in the vertical direction
Moves upwards. Also, it returns to its original position when it touches down. At the moment of being lifted, the caster 4 rapidly rotates around the shaft portion 5 in the direction of gravity (so that the heavier one is downward). When the raised caster 4 lands, a large load acts on the caster 4.

<C> Detection of caster movement Assuming that the A sensor 10 in FIG. 2 is a vertical acceleration sensor, the A sensor 10 detects the vertical movement of the caster 4. Assuming that the B sensor 10 is an acceleration sensor around the shaft 5, the B sensor 10 detects a movement of the caster 4 rotating around the shaft 5.
The C sensor 10 in FIG. 3 detects a load acting on the casters 4.

When the caster 4 rises due to a large earthquake motion, the A sensor 10 detects the upward movement of the caster 4, so that the rise of the caster 4 and its size can be detected. Further, since the load acting on the casters 4 is also removed from the C sensor 10, it is possible to detect the lifting of the device 1. In this way, the A sensor 10 is also the C sensor 1
Even if the value is 0, the lifting of the device 1 can be detected. Next, when the caster 4 rotates around the shaft portion 5 after floating, the B sensor 10 detects the rotation direction and the size of the caster 4.

Thus, for all casters,
Since the movement can be detected, the signal of each sensor 10 is analyzed, and the movement of the device 1 can be accurately detected.

<D> Device Control The signal detected by each sensor 10 is shaped by the control unit 12 to obtain the direction and magnitude of the motion. Device 1 from measured values
The movement of the device 1 is checked, and the operation of the device 1 is controlled. For example, when the signal of the A sensor 10 becomes equal to or more than a predetermined value, it is determined that a large earthquake has occurred, the power is turned off, and the function of artificial dialysis is stopped.

[0019]

According to the present invention, the following effects can be obtained. <B> To accurately detect the movement of the device and control the stop of the device including the medical device. <B> In the event of an earthquake disaster, medical equipment such as an artificial dialysis machine is reliably stopped, for example, a blood circuit that restricts a dialysis patient can be safely removed to ensure the safety of the life of the dialysis patient.

[Brief description of the drawings]

FIG. 1 is an external view of a device control device.

FIG. 2 is an explanatory view of a caster to which a sensor is attached.

FIG. 3 is another explanatory view of a caster to which a sensor is attached.

FIG. 4 is a block diagram of control.

FIG. 5 is a diagram of an earthquake wave applied to a shaking table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Equipment 2 ... Equipment main body 3 ... Leg part 4 ... Caster 5 ... Shaft part 6 ... Cover 7 ... Wheel 10 ... Sensor 11 ... Signal line 12 ... Control unit

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Masaru Imai 1-4-1, Iwamacho, Hodogaya-ku, Yokohama-shi, Kanagawa Prefecture Within the Medical Corporation Aishikakai (72) Inventor Masahiko Kimura 1-16, Shibuya, Shibuya-ku, Tokyo No. 14 Tokyu Construction Co., Ltd. (72) Inventor Masamoge Kawakubo 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd.

Claims (4)

[Claims] 1. An apparatus control apparatus comprising: a plurality of casters for supporting a main body of an apparatus; a sensor for detecting movement of the apparatus; and a control unit for controlling the apparatus by receiving a signal from the sensor. 2. An apparatus control apparatus comprising: a plurality of casters supporting a main body of the apparatus; a sensor for detecting a movement of the caster; and a control unit for receiving the signal from the sensor and controlling the apparatus. 3. The device control device according to claim 1, wherein the sensor detects a rotational motion about a shaft portion of the caster or a vertical motion of the caster. . 4. The device control device according to claim 1, wherein the device is a medical device, and the operation of the device is stopped when the motion of the caster is equal to or more than a predetermined value. Control device.