JP2874038B1 - Electric bed with self-diagnosis display function - Google Patents

Abstract

A self-diagnosis is performed on the operation reliability of a posture control mechanism of an electric bed, and the state is displayed on an operation means or the like. A normal operation state is determined based on a feedback signal generated from a mechanical and electrical abnormality of a linear drive mechanism, a signal of attitude information and a control signal due to an erroneous operation, and a detection signal from a controller itself. If it is determined that there is an abnormality, the operation is immediately stopped, the failure state obtained from the detection signal is determined, the determination result is supplied to the display means of the hand switch 2, and the specific result is determined from the determination result. Display the message in such a way that you can take immediate action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric bed having a self-diagnosis display function.

[0002]

2. Description of the Related Art It is well known that a medical bed plays an important role in assisting a medical treatment and a nursing care treatment in a welfare equipment for a patient having a certain physical disability. In such medical beds, an electric bed provided with a bottom posture control mechanism using an electric motor or the like as a driving source is becoming mainstream. In this electric bed, the posture control of the bottom can be easily performed by the posture control mechanism without burdening the user and the caregiver. On the other hand, in the case of such an electric bed, if a failure occurs in the attitude control mechanism, a secondary accident may occur due to the stoppage of the function unless the means for quick status grasp and function recovery are taken. There is also.

[0003]

However, in some of the conventional attitude control mechanisms, it is difficult to determine whether or not the attitude control mechanism is operating normally. Because of the difficulty, the coping method could not be determined, and it was often observed that repair work for recovering the function required a great deal of time loss. The present invention has been proposed in view of such a background, and performs a self-diagnosis on the operation reliability of the attitude control mechanism of an electric bed, and displays the state on an operation means or the like. An object of the present invention is to provide an electric bed having a function.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an electric motor having an adjusting mechanism for adjusting the posture and the supporting position of the bottom and operating means for giving an operation command to these mechanisms. In the bed, the prime mover of the drive mechanism for operating the adjusting mechanism has a rotational speed detecting means or a displacement detecting means in the drive mechanism, and supplies drive power to the prime mover according to an operation command of the operating means, and detects rotational speed of the drive mechanism. Means, the rotation speed and position information of the prime mover are derived from the detection signal from the displacement detection means, and are compared with the rotation speed and position information during normal operation to determine whether or not the motor is in a normal operation state. If not, it is determined that the vehicle is in an abnormal state, the immediate drive mechanism is stopped, and the operation means is displayed. 2. The self-diagnosis function according to claim 1, further comprising storage means for sequentially accumulating a series of information such as a rotation speed of the prime mover, position information, an abnormal location, and an abnormal cause when an abnormality occurs. Can be prepared. In addition, when it is not in the normal operation state, it is determined that it is in the abnormal state, the immediate drive mechanism is stopped, and the occurrence of the abnormal state, the abnormal location, or the cause of the abnormality can be displayed in characters on the operation means. In addition, when it is not in the normal operation state, it is determined that it is in the abnormal state, the drive mechanism is immediately stopped, and the occurrence of the abnormal state, the abnormal place or the cause of the abnormality can be displayed on the operation means by graphic display. Further, when not in a normal operation state, it is determined to be in an abnormal state, and the immediate drive mechanism is stopped,
The notification may be made by the audio notifying means in the operating means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of an electric bed having a self-diagnosis display function according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an example of a block diagram of an operation control system 1 applied to the electric bed (not shown). The electric bed on which the operation control system 1 is mounted has, for example, an electric bottom raising function and a knee raising function, and has a hand switch 2 that can be operated at a bedside above the bottom as operating means. doing. Note that an operation panel (not shown) may be provided on the outer surface of the footboard so that an attendant, a nurse, or the like can operate. That is, in the electric bed, an operation command is issued by an operation switch (described later) disposed on the hand switch 2, and the well-known back-raising mechanism and the knee-raising mechanism are operated to perform the back-raising operation and the knee-raising operation, respectively. I have to.

As shown in FIG. 1, the operation control system 1 includes a controller 3 mounted on a control box (not shown) arranged on a bed frame (not shown).
In response to this, an operation command signal is given by an operation switch disposed on the hand switch 2, and is controlled by the controller 3 to the motors 4a and 4b which are the driving sources of the linear drive mechanisms in the back raising mechanism and the knee raising mechanism. While supplying the operating power, the motors 4a and 4b are started, and, for example, a displacement sensor (slide VR or the like) provided on a telescopic operating arm (not shown) constituting the linear drive mechanism is used to detect each bottom. This is to obtain location information.

Therefore, the hand switch 2 will be described. The hand switch 2 is provided with operation switches (not shown) for performing a back-raising operation and a knee-raising operation, while a back-raising mechanism, a knee-raising mechanism, and motors 4a and 4b.
Display means (not shown) for displaying the operating state of the device and other accompanying information. Such display means include, for example, a liquid crystal display (LCD) and a light emitting diode (LE).
D) etc. can be applied, whereby the operating state,
Other accompanying information can be displayed in characters, graphics, or symbols.

The motors 4a and 4b have a motor 4
a, 4b itself is provided with a hall element so as to pick up rotation information, a detection signal from the hall element is provided to the controller 3 as rotation information, and further given to the hand switch 2 to be displayed on the above-mentioned display means. Thus, the operator is made to recognize the current operation status.

The controller 3 supplies driving power to the motors 4a and 4b in response to an operation command from the hand switch 2, and controls the rotation speed of the motor 4a and 4b based on a detection signal from a hall element provided in the motors 4a and 4b. It is set so as to derive and monitor the rotation speed and the load state. That is, the controller 3 is provided with a check program (see FIG. 2) for diagnosing rotation information and position information derived from detection signals of the Hall elements of the motors 4a and 4b in the linear drive mechanism and the displacement sensor in the telescopic operating arm. Have been. In such a check program, for example, a comparison is made between the rotational speed during normal operation stored in advance and the rotational speed calculated from the detection signal from the Hall element to determine whether or not normal operation is being performed. The present load state is compared with the current load state, and the position information derived from the detection signal from the displacement sensor is compared with the position information during normal operation (STEP 1). further,
In step 1, the controller 3 detects an abnormal temperature by detecting a temperature by a temperature detecting means (not shown) provided in the controller 3 to detect that a current different from the current flowing in the normal operation flows in the controller 3, for example. It can also be determined that it is in a state.
Also, it can be determined by the current detecting means whether or not each element is operating normally. In the check program, when it is determined that the state is abnormal, the operation is set to stop immediately (STEP 2). Further, it is possible to determine a failure state obtained from the abnormal signal, supply the result of the determination to the display means of the hand switch 2, and perform a display in a form that allows a specific measure to be taken immediately from the determination result. For example, the system status can be clearly displayed by displaying the fault location in characters, lighting the fault location by graphic display, or displaying an error symbol for clearly indicating a response method. It should be noted that depending on the failure situation, a notification means such as a buzzer or a sound is also possible.

Next, an example of an operation procedure of the operation control system 1 described above will be described below with reference to FIG. When an abnormality is found in any system, for example, the controller 3 itself after the power is turned on (STEP 1), the operation is immediately stopped (STEP 2), and the failure location is displayed on the display means of the hand switch 2 by text, The display can be used to illuminate the fault location, or to display the status of the system by displaying an error symbol or the like to clearly indicate a response method. Hand switch 2 if there is no abnormality
Is given to the controller 3 by the operation switch in (ST).
EP3), the corresponding motor 4a from the controller 3,
The drive power is supplied to 4b, the linear drive mechanism is activated, and the telescopic arm is telescopically operated, whereby the back raising or knee raising / lowering operation can be performed. At this time, the motor 4
a, 4b, the detection signal from the Hall element and the detection signal from the displacement sensor in the telescopic operating arm are fed back to the controller 3. The controller 3 calculates the rotation speed of the motors 4a, 4b and monitors the load state. And the absolute position information of the motors 4a and 4b can be grasped. Here, for example, when the detection signal is not captured even though the operation command is issued by the operation switch of the hand switch 2, it is determined that the linear drive mechanism is not operating (STEP 2).
4) Stop the immediate operation (STEP
2) The display of the hand switch 2 can display an abnormal location. On the other hand, in the controller 3, monitoring of the calculated rotation speeds and load states of the motors 4a and 4b is compared with the rotation speed and load state during normal operation, and the controller 3 determines the position information of the motors 4a and 4b. The operation is diagnosed by comparing the position information with the normal operation (STEP 5). If the operation is normal, the drive power is supplied to the motor 4a in accordance with the operation command, the linear drive mechanism is activated, and the back-up and down operation is performed. It can be performed. STEP5
In step (2), when it is determined that the operation is abnormal, the operation is immediately stopped (STEP 2), and the display of the hand switch 2 can display the abnormal part.

As described above, the feedback signal generated due to the mechanical and electrical abnormality of the linear drive mechanism, the attitude information signal and the control signal due to erroneous operation, and the detection signal from the controller 3 itself, It is determined whether or not it is in the operating state, and if it is determined that there is an abnormality, the operation is immediately stopped, the failure state obtained from the detection signal is determined, and the determination result is supplied to the display means of the hand switch 2, Since the results can be displayed in such a way that specific measures can be taken immediately from the judgment results, it is possible to easily find the fault location, identify the cause of the fault, and grasp the corrective method. It is possible, and immediate repair can prevent the situation from worsening, secondary malfunctions and disasters.

In the operation of the electric bed, if a storage means for storing a series of operation records of the operation control system 1 is provided, it is possible to accumulate, for example, information on a failure occurrence time, a failure location and a factor. It can be very useful for comprehensive periodic inspections.

[0013]

As described above, according to the present invention, in addition to the improvement of the operation reliability during the operation of the system, if a malfunction occurs in the attitude control mechanism, the operation is immediately stopped, and Early detection, early investigation of the cause, and quick repair work are possible, and the effects of prior prevention of the occurrence of secondary disasters can be expected. For this reason, the time loss associated with the failure location, cause identification and repair can be minimized, the mechanism can be quickly restored, and daily use can be prevented.

[0014]

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an operation control system applied to an electric bed having a self-diagnosis display function according to the present invention.

FIG. 2 is a flowchart illustrating an example of monitoring an operation state set in the operation control system illustrated in FIG. 1;

[Explanation of symbols]

 1 operation control system 2 hand switch 3 controller 4a, 4b motor

Claims (5)

(57) [Claims] 1. An electric bed having an adjusting mechanism for adjusting a posture and a supporting position of a bottom and operating means for giving an operation command to these mechanisms. Alternatively, the drive mechanism has displacement detection means, and the drive power is supplied to the prime mover by an operation command of the operation means, and the rotation speed and position information of the prime mover are detected by the rotation speed detection means of the drive mechanism and the detection signal from the displacement detection means. Derived, the rotation speed during normal operation, it is determined whether or not in the normal operation state by comparing with the position information, if not in the normal operation state, as an abnormal state, and immediately stop the drive mechanism ,
An electric bed provided with a self-diagnosis display function, which is displayed on an operation means. 2. The self-diagnosis display function according to claim 1, further comprising storage means for sequentially accumulating a series of information such as a rotational speed of the prime mover, position information, an abnormal location, and an abnormal factor when an abnormality occurs. Electric bed with. 3. The system according to claim 3, wherein when not in a normal operation state, it is determined to be in an abnormal state, the immediate drive mechanism is stopped, and the occurrence of an abnormal state, an abnormal location or an abnormal factor is displayed in characters on the operation means. Claim 1 or 2
Electric bed equipped with the self-diagnosis display function described. 4. When the vehicle is not in a normal operation state, it is determined that the vehicle is in an abnormal state, the immediate driving mechanism is stopped, and the occurrence of the abnormal state, the abnormal location or the cause of the abnormality is displayed on the operation means by a graphic display. An electric bed provided with a self-diagnosis display function according to claim 1 or 2. 5. The system according to claim 1, wherein when the vehicle is not in the normal operation state, it is determined that the vehicle is in an abnormal state, the immediate driving mechanism is stopped, and the operation unit is notified by a sound notification unit. Electric bed with self-diagnosis display function.