JP2009067496A - Elevator main rope abnormality determination device and elevator control device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a main rope abnormality determining device for elevator capable of accurately detecting a catch and a cut of a main rope caused by an earthquake. <P>SOLUTION: This device for determining abnormality of an elevator due to a catch and a cut of a main rope comprises balances 61 respectively provided in all of a plurality of main ropes 3, which are fitted to a car 4 or a counterweight so as to suspend the car 4 or the counterweight, so as to detect a load to be applied to the main ropes, a memory section 12 storing a change of a balance value, which is output from the balance in the normal state of the main rope following a change of a load inside of the car, as an ideal value, and a balance value determining section 13 for determining abnormality of the main rope when real balance values from all the balances are not included in a regulation range set based on the ideal balance value corresponding to the load inside of the car among the ideal values stored in the memory section. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator main rope abnormality determination device and an elevator control device that uses this to determine whether or not an earthquake control operation is possible.

  In recent years, the confinement of elevators due to earthquakes has become a problem, and in the future, in order to prevent the confinement, it will be necessary to carry out control operations during an earthquake in which the control operation is performed up to the nearest floor after the earthquake. The problem with the control operation during an earthquake is that the main rope may be caught by equipment in the hoistway or the main rope may be cut due to the earthquake. It is necessary to.

  Conventionally, a scale device attached to an elevator car detects the load in the car by combining the tensions of all the main ropes (see, for example, Patent Documents 1, 2, and 3).

JP-A-3-98974 Japanese Patent Publication No. 8-5605 JP-A-7-101646

  When trying to detect the main rope catch etc. with the scale device, for example, when one of the five main ropes is caught and the tension of one of them is increased by 100 kgf (about 980 N) compared with the normal case, It is detected that the load of 100/5 = 20 kgf is increased compared to the normal when viewed from the cage. As described above, in the scale device, as the number of main ropes increases, it becomes difficult to accurately detect the decrease in the load amount per one rope.

  In addition, when one of the main ropes is cut and the load on the main rope becomes zero, the load applied to the main rope is applied to the other main ropes. Since the load is detected, the output load does not change before and after the main rope is cut, and it is impossible to detect the main rope cut by the scale device.

  Therefore, the present invention more accurately detects catching or cutting of the main rope caused by the earthquake, and if these are not detected, an abnormal operation of the main rope of the elevator is carried out. It is an object of the present invention to provide a determination apparatus and an elevator control apparatus using the determination apparatus.

  In view of the above object, the present invention is an apparatus for determining an abnormality caused by catching and cutting of a main rope of an elevator, and a plurality of pieces attached to the car or the counterweight to suspend the car or the counterweight. A scale that is installed in each main rope and detects the load applied to the main rope, and the change in the scale output from the balance when the main rope is normal according to the change in the load in the car is stored as an ideal scale. The measured scale values from all scales are included in the specified area set based on the ideal scale value corresponding to the load amount in the car among the ideal scale values stored in the storage section at the time of determination. There is a scale determination unit that determines whether or not the main rope is abnormal when there is no main rope abnormality determination device for an elevator.

  In addition, the elevator main rope abnormality determination device and the car are kept in a stopped state until the end of the earthquake when an earthquake occurs, and then the car is slowed down to the nearest floor when the main rope abnormality determination device does not determine the main rope abnormality And a main control unit that performs a seismic control operation to open the door by moving the vehicle in the elevator control device.

  In this invention, the hooking and cutting of the main rope caused by the earthquake is detected more accurately, and if these are not detected, the control operation of driving the car to the nearest floor after the earthquake is performed, so it is safer It can provide controlled operation during earthquakes.

  In this invention, one load measuring scale is attached to each main rope at the end of at least one main rope on the cage side and the counterweight side, and the load applied to each main rope is individually determined. It detects and accurately detects the main rope hooked to the equipment in the hoistway and the main rope cut caused by the earthquake. Furthermore, the output from the balance at each load amount in the car from the normal no load to the maximum load at the reference lifting position in the hoistway is stored in advance for each balance as an ideal scale value. The corrected actual measurement value obtained by correcting the unbalanced weight of the main rope that changes according to the raising / lowering position of the car with reference to the reference raising / lowering position in the hoistway with respect to the actual measurement value from the weighing device at the time of operation control. By detecting whether the main rope is caught or cut in comparison with the ideal scale value, erroneous detection is prevented. And when there is no catching or cutting of the main rope, even after the elevator stops due to an earthquake, it travels to the nearest floor to prevent users from being trapped. Hereinafter, the present invention will be described according to embodiments.

  FIG. 1 is a diagram showing the configuration of an elevator control device including an elevator main rope abnormality determination device according to an embodiment of the present invention. In FIG. 1, a main rope 3 (in fact, a plurality of ropes as described later) is wound around a hoisting machine 2 driven by a motor 1. An elevator car 4 is attached to one end of the main rope 3, and a counterweight 5 is attached to the other end. A car-side weighing device 6 for detecting a load applied to the main rope 3 on the car side is provided on the upper side of the car 4, and a load applied to the main rope 3 on the counterweight side is also provided on the upper part of the counterweight 5. A balance device 7 on the counterweight side to be detected is provided. The power converter 8 is connected to the motor 1 and supplies power for driving the motor 1.

  Further, in the control panel 10 mainly composed of a computer, the main control unit 11 performs various detections for elevator operation control, such as call registration at a landing and a car, a car speed sensor and a car position detector (both not shown). The overall control of the operation of the elevator car 4 is performed according to the signal from the machine. The storage unit 12 stores information and data necessary for various controls in the main control unit 11. Further, in the present invention, the change in the scale value output from each scale (see 61 in FIG. 2) when the load in the car is changed from NL (no load) to FL (maximum load) is stored. The value is stored in advance in the unit 12 as an ideal scale value. The scale determination unit 13 corrects the unbalanced weight of the main rope 3 (see FIG. 3), which will be described later, on the actually measured scale output from the scale devices 6 and 7 on the car side or the counterweight side. Obtain the measured scale value. The corrected actual measured scale value is stored in the storage unit 12 and compared with the ideal scale value for the load in the car at that time, and the state of the main rope 3 being caught or cut is determined.

  In FIG. 1, an earthquake detection signal ED from an earthquake detector (not shown) and a car position detector (not shown), which are particularly related to the present invention, as signals from an elevator operation control detector to the control panel 10 and the like. The car position signal CP from is illustrated.

  FIG. 2 is a diagram showing in more detail the portion of the weighing device 6 on the car 4 side in FIG. 1, and the same or corresponding parts as those in FIG. A car 4 that is an elevator body including a car block 40 on which a user rides has a pair of upper beams 4a at the upper part and is suspended by a plurality of main ropes 3 (three are shown in FIG. 2). It is supported by lowering. Each main rope 3 has a compression coil spring 62 as a compression elastic body, a support plate 63 attached to the end of the main rope 3 and supporting the compression coil spring 62, and is attached between the upper beam 4 a and the support plate 63. A scale 61 is provided for outputting a signal according to the amount of expansion / contraction. The A / D converter 9 converts the analog signal from each scale 61 into a digital signal and sends it to the control panel 10.

  Also in the case of the balance device 7 on the counterweight 5 side, each main rope 3 is provided with a configuration equivalent to the configuration including the balance 61, the compression coil spring 62, and the support plate 63 shown in FIG. Input to the A / D converter 9.

  When the main rope 3 is in a normal state when the load in the car is changed from NL (no load) to FL (maximum load) together with information and data necessary for various controls in the main control unit 11 in the storage unit 12 Changes in the scale values output from the scales 61 of the scale devices 6 and 7 are stored in advance as ideal scale values as mathematical formulas or tables. This is performed, for example, by a writing operation by the scale value determination unit 13. The scale determination unit 13 corrects the unbalanced weight of the main rope 3 to be described later (see FIG. 3) to the actually measured scale output from each scale on the car side or the counterweight side after the car stops due to the earthquake. Go to find the corrected actual measurement value. Then, the state of the main rope 3 being caught or cut is determined by comparing the corrected actual measurement value with the ideal value for the load in the car at that time stored in the storage unit 12.

  FIG. 3 shows the relationship between the position of the car 4 in the hoistway (lifting position) and the unbalanced weight of the main rope 3 applied to the car 4 at each position (main rope unbalanced weight-lifting position characteristic). As shown in FIG. 3, the unbalanced weight of the main rope 3 applied to the car 4 has a relation of increasing in proportion to the change in the lift position from the high position to the low position. To accurately detect the main rope catching and cutting without being affected by the unbalanced weight of the main rope, add or subtract the unbalanced weight of the main rope to or from the actual scale value of each scale of the scale device, and then the hoistway It is necessary to convert to a scale value at a predetermined reference elevation position.

  Therefore, in this embodiment, as shown in FIG. 3, the center position in the hoisting direction in the hoistway is set as a predetermined reference elevating position RP. That is, if the car 4 is at a position lower than the reference lift position RP, the amount of unbalanced weight according to the graph of FIG. 3 is subtracted from the actually measured scale value, and if it is at a higher position, it is added. This is a corrected actual measurement value corrected with reference to the reference lift position RP. Therefore, the main rope unbalance weight-lifting position characteristic is also stored in the storage unit 12 as a mathematical expression or a table. The ideal scale value stored in the storage unit 12 needs to store the scale value at the reference lift position RP. Note that the ideal scale value and the main rope unbalanced weight / lifting position characteristic may be stored separately in a seismic control operation storage unit (not shown), for example.

  FIG. 4 shows an operation flowchart of the earthquake control operation performed by the control panel 10, and the operation will be described in accordance with this flowchart. The flowchart of FIG. 4 is reset every time the car 4 stops, the door opens, the user gets on and off, and then the door closes.

  First, the scale value determination unit 13 obtains the load amount in the car at the start of traveling from, for example, the scale value of the scale 61 of the scale device 6 (or 7), and primarily stores it (step S1). Thereafter, the main controller 11 causes the elevator car 4 to travel (step S2). When the main controller 11 detects the occurrence of an earthquake using, for example, the earthquake detection signal ED from the earthquake detector (step S3), the elevator car 4 waits in a stopped state until the end of the earthquake according to the earthquake detection signal ED (step S4). .

  The scale value determination unit 13 (steps S1, S5 to S9), after stopping the earthquake, after a predetermined time has elapsed (the earthquake ends) when the swing of each main rope 3 stops (step S5), then each scale 61 of the scale device 6 or 7 Is input as an actual measurement value via the A / D converter 9 (step S6). Then, based on the actually measured scale value inputted, the main rope unbalanced weight-lifting position characteristic at this elevator stored in the storage unit 12 and the car position signal CP from the car position detector, and the main rope from the current car position. A corrected actual measurement value obtained by correcting the unbalanced weight is obtained (step S7).

  Separately, after the occurrence of the earthquake, based on the ideal scale value stored in advance in the storage unit 12, for each scale 61, the ideal scale value in the car load stored in step S1 is calculated, and based on the calculated ideal scale value. In each case, a prescribed area is set as a criterion for determining whether or not the main rope 3 may be caught or cut (step S8). The specified area may be a predetermined area centered on the ideal scale value, and is set, for example, as an ideal scale value ± α kgf or an ideal scale value ± (ideal scale value × β%).

  If the corrected actual measurement values obtained in step S7 are all within the specified ranges set in step S8, it is determined that the main rope is not caught or cut, and the main control unit 11 is informed of the main rope. A signal indicating normality is sent, and if it is outside the specified range, it is determined that the main rope is caught or cut, and a signal indicating main rope abnormality is sent to the main controller 11 (step S9).

  When the main control unit 11 receives a signal indicating that the main rope is normal, the main control unit 11 causes the car 4 to travel to the nearest floor at a low speed, opens the door, and performs a control operation for the user to get off the car 4 (step 10). ). If a signal indicating a main rope abnormality is received, there is a possibility that the main rope 3 may be caught or cut, so the car 4 will not run and the situation will be explained in the announcement or display in the car. The stop state is continued until arriving (step 11).

  FIG. 5 shows a temporal change in the corrected actual measurement value when there is an abnormality in one main rope 3. (a) shows when the main rope is caught, and (b) shows when the main rope is cut. When an earthquake occurs during running, the main rope 3 is caught by comparing the corrected actual measurement value of the actual measurement value output from the scale after a certain waiting time with the specified range (based on the ideal measurement value). And disconnection can be determined.

  According to the present invention, it is possible to more accurately determine the possibility of catching or cutting on the main rope at the time of the earthquake occurrence, so if the main rope is normal, it is possible to perform a control operation at the time of earthquake and get the user off at the nearest floor Can reduce confinement.

  In the above embodiment, as the ideal scale value, for each scale, the car when the load in the car is changed from NL (no load) to FL (maximum load) when the main rope is normal is a predetermined car. Changes in the scale value output from the scale when it is in the standard lifting position are stored, but the ideal scale value for only one system is represented by the change in the scale value output from the scale as the car load changes. As a common ideal scale value of each scale, the abnormality of the main rope can be determined with considerable accuracy.

  Further, it is possible to determine the abnormality of the main rope with a considerable degree of accuracy without correcting the measured scale value by the main rope unbalance weight-elevating position characteristic shown in FIG. In this case, the ideal scale value need not be a scale value at a predetermined reference lift position, and a scale value at any lift position can be used.

  Furthermore, the scale determination unit 13, the storage unit 12 storing the ideal scale value and the main rope unbalance weight-lifting position characteristics, the scale 61 provided in each main rope 3, the A / D conversion unit 9, and the outside It is also possible to use it alone as an elevator main rope abnormality determination device by determining whether the main rope is caught or cut.

It is a figure which shows the structure of the control apparatus of the elevator containing the main rope abnormality determination apparatus of the elevator by one Embodiment of this invention. It is the figure which showed the part of the scale apparatus of the cage | basket | car side of FIG. 1 in detail. It is a figure which shows the raising / lowering position of the cage | basket | car in this invention, and the relationship (the main rope unbalance weight-raising / lowering position characteristic) of the unbalance weight of the main rope hanging on the cage | basket | car in each position. It is an operation | movement flowchart of the control operation at the time of an earthquake performed with the control panel in this invention. It is a figure which shows the time change of the correction | amendment actual measurement scale value when there exists abnormality in one main rope in this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Motor, 2 Hoisting machine, 3 Main rope, 4 Car, 4a Upper beam, 5 Balance weight, 6,7 Weighing device, 8 Power converter, 9 A / D conversion part, 10 Control panel, 11 Main control part , 12 storage unit, 13 scale determination unit, 61 scale, 62 compression coil spring, 63 support plate, CP cage position signal, ED earthquake detection signal.

Claims (4)

A device for judging abnormalities caused by catching and cutting of an elevator main rope,
A scale for detecting a load applied to the main rope provided on each of the plurality of main ropes attached to the car or the counterweight in order to suspend the car or the counterweight;
A storage unit that stores the change in the scale value output from the balance at the normal time of the main rope according to the change in the load in the car as an ideal scale value;
At the time of determination, when the measured range from all the scales is not included in the specified range set based on the ideal scale corresponding to the load in the car among the ideal scales stored in the storage unit, the main rope A scale determination unit for determining abnormality;
An elevator main rope abnormality determination device characterized by comprising:   A separate ideal scale value is stored for each scale in the storage unit, and the scale determination unit performs determination by setting a specified area based on each ideal scale value for each scale. The elevator main rope abnormality determination device according to Item 1. The ideal scale value stored in the storage unit is an ideal scale value when the car is at a predetermined reference lift position in the hoistway, and the storage unit further includes an Further storing the main rope unbalance weight-lift position characteristic of the elevator to be determined for correcting the unbalance weight of the main rope changing according to the lift position with reference to a predetermined reference lift position in the hoistway;
The measured value determination unit corrects the unbalanced weight of the main rope according to the car position in accordance with the main rope unbalanced weight-lifting position characteristic and the car position signal stored in the storage unit. 3. The abnormality of the main rope is determined by obtaining a value and comparing a defined area set based on an ideal scale value at the predetermined reference lift position and a corrected actual measurement scale value. 4. Elevator main rope abnormality judgment device. The elevator main rope abnormality determination device according to any one of claims 1 to 3,
When the earthquake occurs, the car is stopped until the end of the earthquake, and then, when the main rope abnormality determination device does not determine the main rope abnormality, the car is moved to the nearest floor at a low speed to open the door at the time of the earthquake. A main control unit to perform,
An elevator control device comprising:

Images