JP5023511B2 - Elevator equipment - Google Patents

Description

  This invention diagnoses the abnormality of the rope by the automatic inspection operation (diagnostic operation) carried out after the occurrence of the earthquake, and prevents a secondary disaster in which the hoistway equipment is damaged by running the car while the rope is caught. In addition, the present invention relates to an elevator apparatus that shortens the time required to return to normal operation.

When an earthquake occurs and many elevators are put out of service due to seismic control operation, it is necessary for the elevator technicians to manually restore them, which requires a lot of specialist arrangements and a lot of recovery time. become. In particular, in order to determine whether or not the rope is caught in the hoistway, a specialist engineer enters the hoistway and conducts an inspection operation while visually checking the hoistway status, so a lot of time is required for the inspection. Cost. Therefore, it is necessary to perform recovery quickly and efficiently.
As a conventional technique for solving this problem, an elevator governor rope abnormality detection device that detects that an elevator governor rope is caught by a projecting object or the like protruding into a hoistway from a vertical displacement of a governor tension vehicle is known. (For example, refer to Patent Document 1).
In addition, as other conventional techniques, vibration means for applying vibration to the rope of the elevator, vibration detection means for detecting vibration applied by the vibration means, and abnormality of the rope based on the vibration detected by the vibration detection means There is known an elevator apparatus having an abnormality determining means for determining (see, for example, Patent Document 2).
In addition, a device that transmits a transverse wave signal wave to the suspended body of the elevator, such as a main rope, a weight compensation rope, and a tail cord, is provided near one end of the elongated body, and receives the transverse wave signal wave of the suspended body. Install the device near the transmitter or near the other end of the strip, and provide a reasonable time delay from the transmission of the transverse wave to the reception of the transverse wave corresponding to the suspension length of the strip that changes as the car moves up and down. An entanglement detection device for a suspended body of an elevator provided with a control device for determining whether a received wave is received is known (for example, see Patent Document 3).

JP-A-10-120327 JP 2000-255928 A JP-A-2-86585

In Patent Document 1, it is detected that the governor-tensioned wheel is pulled upward when the governor rope is caught, but there is a problem that it is not possible to detect catching of a hoisting rope or a control cable other than the governor rope. .
In Patent Documents 2 and 3, the target rope is vibrated in the lateral direction, and the hook of the rope is determined from the state of the wave transmitted to the rope. It has been necessary to install a vibration exciter for generating a vibration force on all target ropes, resulting in a problem that the device configuration becomes large and complicated.

  The present invention has been made to solve the above-described problems, and provides an elevator apparatus that determines the state of a governor rope, a hoisting rope, and the like after an earthquake from data on a rope displacement and tension fluctuation. is there.

In the elevator apparatus according to the present invention, when the earthquake detector operates, the car is stopped at the nearest floor, and after the automatic inspection operation (diagnostic operation) is performed, the elevator is returned to the normal operation. A governor rope that is attached to the car and moves synchronously with the car, a governor around which the governor rope is wound, a governor encoder installed in the governor, and a value of the rotation angle of the governor encoder in a normal state. When the earthquake detector detects an earthquake, it requests the rotation angle value of the governor encoder after the earthquake, and stores the obtained rotation angle value and memory after the earthquake. Comparator that compares the rotation angle value of the governor encoder stored in the equipment with the normal value, and using the output value of the governor encoder, the rotation angle of the governor is calculated before and after the earthquake. By comparing with the amount of change, for automatic inspection operation it is determined that if not exceeded the set value of the certain level fluctuation amount from the governor encoder after the earthquake is not caught governor rope, the governor encoder after the earthquake If it exceeds a certain level settings where there is a variation amount of from is to report to the notification system determines that the governor rope caught.

  According to this invention, the hooking of the rope due to the earthquake can be determined with high accuracy, the secondary disaster at the time of the inspection operation after the earthquake can be prevented, and the operation resumption determination is ensured. In addition, the check operation start time can be shortened, and if no abnormality is recognized by the check operation, the normal operation can be quickly restored.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram of an elevator apparatus showing lateral vibration of an elevator rope during an earthquake, FIG. 2 is a schematic diagram of the elevator apparatus showing a state in which the elevator rope is hooked when an earthquake occurs, and FIG. 3 is an embodiment of the present invention. It is a block block diagram which shows the rope abnormality determination apparatus of the elevator apparatus in the form 1.

FIG. 1 shows the lateral vibration of an elevator rope during an earthquake. In the figure, 1 is an elevator car, 2 is a counterweight, 3 is a hoisting rope that suspends a counterweight 2 and a car 1, 4 is a hoisting machine around which a hoisting rope 3 is wound, and the car 1 and the counterweight Raise and lower 2 in a fishing bottle style. 5 is a balance rope connected to the lower part of the car 1 and the lower part of the weight 2, 6 is a balance car installed at the lower part of the hoistway, 7 is a governor rope attached to the car 1 and moving in synchronization with the car 1, 8 Is a governor around which the governor rope 7 is wound, and 9 is a governor encoder installed in the governor 8. In the event of an earthquake, the hoisting machine 4 that drives the counterweight 2 and the hoisting machine 4 is driven by the horizontal vibration (lateral displacement) of the hoisting rope 3, and is installed between the lower part of the car 1 and the lower part of the counterweight 2 Lateral vibration (lateral displacement) of the balance rope 5 wound around the balance wheel 6 and lateral vibration (lateral displacement) of the governor rope 7 wound around the governor 8 are generated. A control cable (not shown) is attached to the lower part of the car 1, and this control cable also generates lateral vibration (lateral displacement) during an earthquake.
The above elevator rope cable is located in a narrow hoistway, so if a horizontal vibration (lateral displacement) occurs due to the shaking of the building due to an earthquake, the equipment is placed in the hoistway wall or hoistway May collide and get caught.
On the other hand, when the car 1 is stopped at normal times, the governor rope 7 does not move in either the vertical direction or the horizontal direction. Therefore, the output from the governor encoder 9 installed in the governor 8 does not rotate and therefore has a constant value. keep.

  FIG. 2 shows a state where the governor rope 7 is caught by the hoistway device 10 due to the occurrence of an earthquake. In this case, when the governor rope 7 is caught by the hoistway device 10 even though the swing of the rope is stopped after the earthquake and the car 1 is stationary, the governor 8 corrects the extension amount of the governor rope 7 due to the catch. Therefore, it rotates to the hooked rope side, and the output value of the governor encoder 9 changes from that before the earthquake. That is, the fluctuation amount after normal times and after an earthquake is a criterion for determining a rope abnormality. When the inspection operation is performed in the state of FIG. 2 where the governor rope 7 is caught, an excessive force is generated in the hoistway device 10 and is displaced, and the hoistway device 10 or the governor rope 7 is damaged. Therefore, by using the governor encoder 9 installed in the governor 8, the rotation value of the governor 8 is compared with values before and after the earthquake (variation amount), so that the variation value from the governor encoder 9 is set to a certain level after the earthquake. When it exceeds the value, it can be determined that the governor rope 7 is caught.

FIG. 3 is a block diagram showing a governor rope abnormality determination device. In the figure, 9 is a governor encoder, 20 is a car stop signal, 21 is a trigger, 22 is a storage device, 23 is a seismic detector, 24 is a trigger, 25 is a comparator, 26 is a judgment device, 27 is a notification system, 28 is Automatic inspection operation mode.
When the car stops at the destination floor, the elevator control panel (not shown) outputs a car stop signal 20 to the trigger 21. In response to the car stop signal 20, the trigger 21 requests the governor encoder 9 attached to the governor 8 to output the current value of the rotation angle. The obtained rotation angle value of the governor encoder 9 is stored in the storage device 22. If an earthquake does not occur, the elevator apparatus repeats the above operation during normal operation.
When an earthquake occurs and the earthquake detector 23 detects the occurrence of the earthquake, the earthquake detector 23 sends an operation signal to the trigger 24. The trigger 24 requests the governor encoder 9 to send a signal. The trigger 24 differentiates the signal of the governor encoder 9 sent by a differentiator (not shown), and monitors the state of the governor encoder 9 until the differential value is 0, that is, the encoder signal does not vary. When the above-described differentiator confirms that the rope shake after the earthquake has stopped, the trigger 24 outputs the current encoder value to the comparator 25. The comparator 25 compares the encoder output value before the earthquake and the output value after the earthquake, and sends the difference value (variation amount) to the determination device 26. If it exceeds the set value of a certain level, the determination device 26 determines that the governor rope is caught, sends the result to the notification system 27, and pauses the elevator device until the restoration work by a specialist engineer. On the other hand, if the output from the comparator 25 is below a certain set value, it is determined that the governor rope is not caught, and the automatic inspection operation mode 28 is notified to perform the automatic inspection operation.

  In the above operation, in order to start the inspection operation after confirming that the governor rope 7 has stopped shaking, the inspection operation is performed while the governor rope 7 is shaking, and contact with the hoistway device 10 due to the shaking of the governor rope 7 is performed. Can prevent secondary disasters. In addition, since the governor rope is caught before starting the inspection operation, the inspection operation can be performed without the governor rope being caught to prevent secondary disasters caused by running in the rope caught state. it can.

  In the above description, only the governor rope 7 has been described. However, since the position of the car fluctuates due to the hoisting rope 3 being caught by a hoistway device or the like, The catch can be determined from the output of the governor encoder 9. Furthermore, even if a signal of a scale device capable of measuring the fluctuation of the rope tension is used instead of the governor encoder 9 of FIG. 3, it is possible to capture a change in the tension applied to the car due to the hoisting rope or the balance rope being caught. This also provides the same effect.

Embodiment 2. FIG.
4 is a block diagram showing a rope abnormality determination by a conventional rope abnormality detection device during inspection operation, and FIG. 5 is a block diagram showing a rope abnormality determination by a rope abnormality determination device of an elevator apparatus according to Embodiment 2 of the present invention. 6 is a characteristic diagram showing a signal waveform of torque current and a differential value thereof in the rope abnormality determination device according to Embodiment 2 of the present invention.

FIG. 4 shows a rope abnormality determination means by a conventional rope abnormality detection device during an inspection operation. For example, when the hoisting machine torque current is used as the rope abnormality detection means, the obtained measurement signal 31 and the normal normal signal 32 stored in the storage device in advance are input to the comparator 33. If the obtained difference value is equal to or greater than a certain level value, the determination device 34 determines that the rope is abnormal. However, the normal signal 32 needs to be updated periodically to eliminate the influence of environmental changes such as temperature changes and operating years, and the value changes depending on the position of the car. Requires storage capacity.
Therefore, in the second embodiment of the present invention, the rope abnormality is determined without using the normal signal 32 that is easily affected by environmental fluctuations such as temperature change and operation years. FIG. 6 shows a torque current signal waveform and its differential value of the rope abnormality determination device. When the car travels in the up-and-down direction by the inspection operation, the measurement signal x smoothly changes in value with the travel time t as indicated by a broken line if there is no abnormality in the rope. On the other hand, if an abnormality such as a hook has occurred, a fluctuation component as indicated by a solid line is superimposed. Since the fluctuation of the torque current at the normal time is much slower than the abnormal signal, only the abnormal vibration component can be extracted by differentiating the measurement signal 31. Therefore, by setting the threshold value P, it is possible to determine a rope abnormality.
FIG. 5 shows a rope abnormality determination by the rope abnormality determination device according to the present invention which does not use a normal signal. That is, by passing the obtained measurement signal 31 through the differentiator 35, only the abnormal vibration component is extracted, and if the determination device 34 exceeds the threshold value P, it is determined that the rope is abnormal.

  With the above configuration, it is possible to detect a rope abnormality with a simple configuration without requiring a large capacity storage device or a special operation for obtaining a regular normal signal.

  In the above description, torque current is used as a measurement signal, but the same effect can be obtained by using a scale signal and car vibration / noise data.

Embodiment 3 FIG.
FIG. 7 is a block diagram showing a rope abnormality determination device for an elevator apparatus according to Embodiment 3 of the present invention.

FIG. 7 is a block diagram illustrating a rope abnormality determination device that can simultaneously determine whether the hoisting rope and the governor rope are caught during the inspection operation. In the figure, 9 is a governor encoder, 40 is a hoisting machine encoder installed in the hoisting machine 4, 41 is a first car position conversion device obtained from the output of the hoisting machine encoder 40, and 42 is from the output of the governor encoder 9. The obtained second car position conversion device 43 is a comparator for comparing the car position information obtained from the first car position conversion device 41 with the car position information obtained from the second car position conversion device 42. Is a determination device, 45 is a notification system, and 46 is a normal operation mode.
During the inspection operation, the first car position conversion device 41 obtains the first car position information by using the output from the hoisting machine encoder 40 installed in the hoisting machine 4. At the same time, second car position information is obtained by the second car position conversion device 42 using the output from the governor encoder 9 installed in the governor 8. The car position information obtained from the first car position conversion device 41 and the car position information obtained from the second car position conversion device 42 are sent to the comparator 43 and passed through the hoisting rope 3 and the governor rope 7. As the car position, the values are compared and the difference value is sent to the determination device 44.
If the governor rope 7 is traveling while being caught by the hoistway device 10, a deviation occurs between the car position information from the governor rope 7 and the normal car position information from the hoisting rope 3. Therefore, the determination device 44 determines that the governor rope 7 is caught if it exceeds a certain level of deviation value, sends the result to the notification system 45, and pauses the elevator device until the restoration work by a specialist engineer. . Similarly, even when the hoisting rope 3 is hooked, it is possible to determine the hooking by comparing with the car position information on the normal governor rope side. Even when the hoisting rope 3 and the governor rope 7 are hooked at the same time, it is possible to determine an abnormality in the rope by taking a deviation because the rates of change of the respective car position information are different. On the other hand, if the output from the comparator 43 is below the set value, it is determined that the rope is not caught, and the normal operation mode 46 is notified so as to return to the normal operation.

  With the above operation, during inspection operation, abnormalities in the hoisting rope or governor rope can be easily judged with a simple configuration without preparing a normal signal for reference. Secondary disaster can be prevented.

  In the above description, the car position information is used as the comparison signal, but the same effect can be obtained by using the car speed information.

It is the schematic of the elevator apparatus which shows the lateral vibration of the rope of an elevator at the time of an earthquake. It is the schematic of the elevator apparatus which shows the state where the rope of the elevator was hooked at the time of an earthquake occurrence. It is a block block diagram which shows the rope abnormality determination apparatus of the elevator apparatus in Embodiment 1 of this invention. It is a block diagram which shows the rope abnormality determination by the conventional rope abnormality detection apparatus in a check driving | operation. It is a block diagram which shows the rope abnormality determination by the rope abnormality determination apparatus of the elevator apparatus in Embodiment 2 of this invention. It is a characteristic view which shows the signal waveform of the torque current of the rope abnormality determination apparatus in Embodiment 2 of this invention, and its differential value. It is a block block diagram which shows the rope abnormality determination apparatus of the elevator apparatus in Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elevator car 2 Balance weight 3 Hoisting rope 4 Hoisting machine 5 Balance rope 6 Balanced car 7 Governor rope 8 Governor 9 Governor encoder 10 Hoistway equipment 20 Car stop signal 21, 24 Trigger 22 Storage device 23 Earthquake detector 25, 33 , 43 Comparator 26, 34, 44 Judgment device 27, 45 Notification system 28 Automatic inspection operation mode 31 Measurement signal 32 Normal signal 35 Differentiator 40 Hoisting machine encoder 41 First car position conversion device 42 Second car position Conversion device 46 Normal operation mode

Claims (2)

When the seismic detector is activated, the car is stopped at the nearest floor, and after the automatic inspection operation (diagnostic operation), the elevator is returned to normal operation, and the elevator is controlled during earthquakes.
A governor rope that is attached to a car and moves synchronously with the car, a governor around which the governor rope is wound, a governor encoder installed in the governor, and a value of the rotation angle of the governor encoder are normally obtained and obtained. When the seismic detector senses an earthquake, the storage device that stores the obtained normal rotation angle value requests the rotation angle value of the governor encoder after the earthquake, and the obtained post-earthquake rotation angle value is obtained. A comparator for comparing the value and the value of the rotation angle of the normal governor encoder stored in the storage device,
Using the output value of the governor encoder, by the rotation angle of the governor compared with the amount of change before and after the earthquake, if it does not exceed the set value of the certain level fluctuation amount from the governor encoder after the earthquake the for automatic inspection operation determines that the governor rope is not caught, report if it exceeds the set value of the certain level fluctuation amount from the governor encoder after the earthquake is determined that the governor rope is caught An elevator apparatus characterized by notifying the system. In a state where the elevator is stopped, the output value of the governor encoder elevator apparatus according to claim 1, wherein the comparing the value of before and after the earthquake.

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