JPH08333068A - Failure detecting device for elevator guiding device - Google Patents

Abstract

PURPOSE: To provide a failure detecting device for the control device of an actuator used for the travel guiding device of an elevator car. CONSTITUTION: The control device 90a of an actuator 81 is constituted of an acceleration sensor fitted to an elevator car or a car frame and detecting the magnitude and direction of the transverse vibration acceleration, an amplifier 91 amplifying the output of the acceleration sensor, a current amplifier 93 exciting the actuator 81, a current detector 96 detecting the magnitude of the current 95 flowing in the actuator 81, a comparator 97 comparing the output of the amplifier 91 amplifying the output of the acceleration sensor with a set value, and a failure judging unit 98 judging the failure of the control device 90a based on the operation mode and the output of the comparator. When the control device 90a fails, the abnormality signal is outputted from the failure judging unit, and the failure of the actuator control device 90a is detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator guide device, and more particularly to an elevator guide device for reducing horizontal vibration of a car.

[0002]

2. Description of the Related Art As a conventional technique relating to an elevator guide device, for example, there is a technique described in Japanese Patent Laid-Open No. 5-186162.

In this prior art, there are a contact type guide device which guides the car by constantly contacting the guide device with the guide rail and a non-contact type guide device which guides the car by facing the guide rail in a non-contact manner. The magnetic guide, which is a non-contact type guide device, is configured so that the controller detects the change in the gap (gap) between the electromagnet facing the guide rail and the guide rail with this displacement device and keeps the gap constant. It is carried out.

On the other hand, a method has also been proposed in which the position of a weight attached to the bottom of the car is changed by an actuator based on the car acceleration signal to suppress and control car vibration.

[0005]

However, it is impossible to detect an abnormality in the actuator that drives the magnetic guide or the weight. Because of unbalanced load of passengers, getting in and out of passengers,
This is a system in which the control force is constantly operating to suppress disturbances such as rail bends and unbalanced loads due to the tail cord, so the system may be operating normally, or even if it is not necessary to operate, for example, an acceleration sensor or a gap. There was a problem that it was not possible to judge whether the control force continued to work or was interrupted due to an abnormal output of the sensor or a system abnormality caused by a wire break or short circuit of the power converter or actuator.

An object of the present invention is to provide a failure detecting device for an actuator used in a guide device for an elevator car.

[0007]

SUMMARY OF THE INVENTION An actuator failure detection device of the present invention controls an actuator by acceleration feedback or gap feedback, detects a current flowing through the actuator, and detects when a car is in a non-vibration mode. When the detection information value exceeds the preset setting value, or when the detection information value does not exceed the preset setting value in the vibration mode of the car, that is, when the elevator is traveling, the actuator is determined to be defective. It is a thing.

[0008]

According to the present invention, in the non-vibration mode, when the car is stopped and there is no passenger getting on and off, and when the actuator is operating normally, no current flows to the actuator and the weight is at the neutral point. In addition, in the vibration mode (while the elevator is running), the actuator guides while generating a force supporting the unbalanced load of the car and a force according to the vibration information. Paying attention to the fact that a transient current flows in the and the weight does not stay at the neutral point for a long time,
The control result in each mode is monitored to determine whether or not there is a failure in the actuator.

[0009]

1 is a front view of a traveling guide device for an elevator car, FIG. 2 is a block diagram of actuator control, FIG. 3 is a view of the car of FIG. 1 seen from above, and FIG.
FIG. 4 is a diagram showing an internal circuit of the actuator control device, FIG. 4 is a failure detection timing chart, and FIG. 5 is a circuit diagram of the failure detection device of the actuator control device which constitutes the present invention.

In FIG. 1, 1 is a car, 2 is a car frame, and 3
1, 32 are anti-vibration rubbers, 41, 42 are guide rails, 51
˜54 is a guide device, 61a to 61d are acceleration detectors, 7
1 to 74 are roller guides, 81 to 84 are actuators composed of electromagnets, and 90a to 90d are actuators 8.
1 to 84 are control devices.

In FIG. 1 showing an elevator guide device, a car 1 is supported on a car frame 2 by anti-vibration rubbers 31 and 32. The car frame 2 is provided with guide devices 51 to 54 for guiding the car along the guide rails 41 and 42 provided upright in the hoistway.

In FIG. 1, the guiding devices 51 to 54 are respectively
It is composed of roller guides 71 to 74 which are first guide devices which constantly guide the guide rails 41 and 42 while traveling, and an electromagnet which is a second guide device which travel guides the guide rails 41 and 42 in a non-contact manner. The actuators 81 to 84 are provided. Further, the control devices 90a to 90d of the actuators 81 to 84, which are the second guide devices, and the acceleration detectors 61a, 61b, 62a, 62b are installed near the respective actuators 81 to 84. Each control device 9 for the actuators 81 to 84 which is the second guide device
0a to 90d are acceleration detectors 61a, 61b, 62a, 62b mounted near the actuators of the car frame 2.
In accordance with the output of a gap sensor (not shown) for detecting the distance between the rail and the guide device, the gap control is used as a main feedback loop as shown in the block diagram of FIG. The actuator is controlled by a control mechanism.

For example, the acceleration detector 61a mounted on the upper part of the car frame detects the magnitude of the horizontal acceleration, and the controller 90a controls the current of the actuator 81, that is, the suction force, to thereby suppress the vibration of the car. Suppress.

Similarly, the other actuators 82, 83, 84 mounted on the car frame are provided with acceleration detectors 61b, 62a, 62b and a control device 9 near them, respectively.
Current control is performed by 0b, 90c, and 90d.

FIG. 3 shows the structure of the guide device when the car of FIG. 1 is viewed from above.

In FIG. 3, 61a and 61b are lateral acceleration detectors, 63a and 63b are longitudinal acceleration detectors,
Reference numerals 81, 82, 85-88 are actuators composed of electromagnets, 90a is a control device for the actuators 81, 85, 86, 91 is an amplifier, 92 is an integrator, 93 is a current amplifier, 94 is a phase inverter, and 95 is an electromagnet. Flowing current, 9
6 is a current detector.

Here, for simplification of description, an example in which the actuator is controlled only by acceleration feedback is shown.

In FIG. 3, actuators 81, 85, 86
Controller 90a detects the acceleration in the direction (left-right direction) where the guide surfaces of the guide rails of the car frame 2 face each other by the output of the acceleration detector 61a attached to the car frame 2, and controls the feedback of the actuator 81. To do. That is, the output of the acceleration detector 61a mounted on the upper portion of the car frame is proportionally integrated by a circuit including an amplifier 91 of the control device 90a and an integrator 92 having a bandpass filter for removing noise superimposed on the acceleration signal, The current amplifier 93 controls the current 95 of the electromagnet of the actuator 81. The current of the electromagnet is feedback-controlled by the current detector 96 in order to speed up the current response.

Further, in all the structures, actuators 85 and 86 composed of a roller guide (not shown) which guides the guide rail 41 in the front-back direction at all times to guide the travel and an electromagnet which guides the guide rail 41 in the contact-free manner are provided. Each is installed. The actuators 85 and 86 are configured as a pair, the acceleration detector 63a detects the longitudinal acceleration of the car, and the output of this is input to the control device 90a to control the current of the actuators 85 and 86.

The electromagnet of the actuator has two for the front-back direction.
One, one for the left-right direction, a total of three are configured as one set. Since the actuators are located at four locations on the car, a total of twelve electromagnets will support the car. For one set of actuators, one set of control devices and one acceleration detector for each of the front-rear direction and the left-right direction are provided.

By the way, in order to realize an elevator that is comfortable to ride on, it is necessary that the actuator be operating normally. For that purpose, it is necessary to detect the failure of the actuator control device.

That is, as shown in the timing chart of FIG. 4 (a), since there is no disturbance in the non-vibration mode, that is, when the elevator is stationary and passengers are not getting on and off, the actuator control device 90a operates normally. Then, no current flows through the actuator. Further, in the vibration mode, that is, while the elevator is traveling, horizontal vibration acceleration is generated due to disturbances such as bending of the guide rail, tail code misalignment, and unbalanced load of passengers. Therefore, if the control device is normal, a transient current flows through the electromagnet of the actuator as shown in FIG. 4 (c).

In the present invention, in order to detect a failure of the actuator control device, as shown in the circuit diagram of FIG. 5, the amplifier of the current detector 96 which detects a value proportional to the current 95 flowing from the current amplifier 93 to the actuator 81. The comparator 97 compares the output of 91 with the set value, and the output of the comparator 97 and the elevator operation mode signal are input to the failure determiner 98, whereby the determiner 98 detects a failure of the actuator control device. You can For example, when the operation mode is the non-vibration mode and the output of the comparator is as shown in FIG. 4 (b), it is more than the set comparison value even when the car is stationary and there are no passengers. Since a large amount of current is flowing in the electromagnet, the output of the comparator 97 becomes "H", and the signal from the operation mode is also at the time of stop without passengers, so the signal from here is also "H". Therefore, the failure determiner 98 generates an output "H", and the actuator control device 90a determines that it is abnormal and outputs a failure signal. Further, in the vibration mode, when the output of the comparator is as shown in FIG. 7D, even if the elevator is running, only a current that is abnormally lower than the comparative value set to a relatively low level is applied to the electromagnet. Since the comparator 97 still outputs "H" because it is not flowing, it does not function as an actuator. Therefore, the failure determiner 98 determines that the control device is abnormal and outputs an abnormal signal.
In addition, even when the control device becomes abnormal during the traveling of the elevator in the figure (d) and a current more than the set value continuously flows, the vibration mode is always switched to the non-vibration mode at least once during one traveling stroke. Therefore, since it can be detected when switching to the non-vibration mode, it is possible to detect the abnormality of the control device in a short time.

In the embodiment, as the elevator guide device, the failure detecting device for the control device of the actuator composed of the electromagnet has been described, but it is composed of another guide device such as a solenoid, and the roller or shoe is used. The actuator current that controls the pressing force that is applied to the guide rail by the solenoid current detection of the actuator controller, or even the system that moves the weight under the car by the actuator to suppress the car vibration It is needless to say that the present invention can be applied to system abnormality detection if the value is detected and the value is determined based on the elevator operating state.

[0025]

According to the present invention, it is possible to detect a failure of the actuator control device, so that it is possible to provide an elevator system that stably supports the car and provides a comfortable ride.

[Brief description of drawings]

FIG. 1 is a front view showing a conventional typical traveling guide device for an elevator.

FIG. 2 is a block diagram for controlling an actuator for a travel guidance device.

3 is a view of the car of FIG. 1 seen from above and a circuit diagram of an actuator control device.

FIG. 4 is a timing chart for explaining failure detection.

FIG. 5 is a failure detection circuit diagram of the actuator control device of the present invention.

[Explanation of symbols]

61 ... Acceleration detector, 81 ... Actuator, 90a ...
Actuator control device, 91 ... Amplifier, 92 ... Integrator, 93 ... Current amplifier, 94 ... Phase inverter, 95 ... Current, 96 ... Current detector, 97 ... Comparator, 98 ... Fault determination unit, 99 ... Fault detection circuit.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroshi Nagase 7-1-1 Omika-cho, Hitachi City, Ibaraki Hitachi Ltd. Hitachi Research Laboratory (72) Inventor Takeki Ando 1-6, Kandanishiki-cho, Chiyoda-ku, Tokyo Address, Hitachi Building System Service Co., Ltd. (72) Inventor, Toshiaki Kurosawa 1-6, Kanda Nishikicho, Chiyoda-ku, Tokyo House, Hitachi Building System Service (72) Inventor Masahiro Kontani 1-chome, Kandanishikicho, Chiyoda-ku, Tokyo Address, Hitachi Building System Service Co., Ltd. (72) Inventor, Akihiro Ikeda 1-6, Kandanishikicho, Chiyoda-ku, Tokyo Within Hitachi Building System Service Co., Ltd.

Claims (9)

[Claims] 1. A control force of a first actuator mounted on the car side facing the guide rail or a weight mounted on the car side, depending on the car acceleration or the gap between the guide rail and the guide. In controlling the control force of the second actuator mounted to change the position, a device for detecting the magnitude of the control force of the first and second actuators is provided, and in the vibration mode of the car, When the peak value of the output of the detection device is smaller than a set value, or in a non-vibration mode, a determiner for determining that the actuator is abnormal when the output of the detection device is larger than the set value is provided. Elevator guidance device failure detection device. 2. The failure detection device for an elevator guide device according to claim 1, wherein the detection device detects a magnitude of a current of the actuator. 3. The failure detecting device for an elevator guide device according to claim 1, wherein the vibration mode is a state in which the car is in a traveling state. 4. The failure detection device for an elevator guide device according to claim 1, wherein the non-vibration mode has the car stopped. 5. The failure detection device for an elevator guide device according to claim 4, wherein the non-vibration mode is a state in which passengers are not getting on or off the car. 6. The failure detecting device for an elevator guide device according to claim 1, wherein the first actuator is a magnetic guide constituted by an electromagnet, and its control force is an electromagnetic attraction force. 7. The failure detecting device for an elevator guide device according to claim 1, wherein the first actuator is constituted by a solenoid, and a control force thereof is a pressing force for pressing the guide rail via a roller or a shoe. 8. The failure detection device for an elevator guide device according to claim 1, wherein the second actuator is a servo motor that moves the position of the weight through a ball screw. 9. The failure detection device according to claim 1, wherein the detection device detects the position of the weight.