JP4994633B2 - Elevator automatic inspection device - Google Patents

Description

  The present invention relates to an elevator automatic inspection device for automatically inspecting an elevator after an earthquake, and an elevator automatic inspection method.

  Conventionally, there has been proposed an elevator abnormality detection device that periodically measures car vibration and determines whether or not the current vibration level is abnormal from the past maximum and minimum vibration levels. The vibration level measured in the past is stored in a memory (see, for example, Patent Document 1).

  Conventionally, an elevator inspection device that detects abnormal noise in a hoistway using a microphone provided in a car has also been proposed (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 10-59645 JP-A-6-247657

  However, in the elevator abnormality detection device disclosed in Patent Document 1, since the vibration level changes due to the aging of the elevator, the abnormality determination criterion is not clear, and there is a risk of increasing the number of erroneous detections. Moreover, since it is necessary to secure a memory for storing past vibration data, the apparatus becomes expensive.

  Moreover, in the elevator inspection apparatus disclosed in Patent Document 2, there is a risk of erroneous detection of measuring external sounds other than the hoistway. In addition, since the noise level standard differs for each hoistway, adjustment to determine the noise level standard becomes difficult.

  The present invention has been made in order to solve the above-mentioned problems, and can detect an abnormality of an elevator more reliably and can also be an inexpensive automatic inspection device for an elevator. The purpose is to obtain an automatic elevator inspection method.

The elevator automatic inspection device according to the present invention is provided with one end to whether a car suspension car is provided, a counterweight provided with a counterweight suspension car, and a first leashing device provided at the upper part in the hoistway. The other end is connected to the second rope stop device provided in the upper part of the hoistway, and the car and the counterweight are suspended to hang the car and the counterweight. Elevator automatic for inspecting the elevator provided in an elevator having a main rope to be lowered and a hoisting machine including a drive sheave around which the main rope is wound and lifting and lowering a car and a counterweight by rotation of the drive sheave A load detecting device for detecting the tension of the main rope as a detected load, which is provided on at least one of the first rope stopping device and the second rope stopping device, and detecting the torque current of the hoisting machine. Do Because of the torque detector, and based on information from the torque detection device obtains the tension of the main ropes as the estimated load detected between the load difference between the detected load and the estimated load, and the load detecting device and the torque detecting device A determination device is provided that determines whether or not there is an abnormality in the elevator by detecting whether at least one of the time differences when the value fluctuates has reached a predetermined threshold value .

  In the elevator automatic inspection device according to the present invention, the estimated load obtained based on the information from the torque detection device for detecting the rotational torque of the drive sheave and the load detection device for detecting the load of the car are detected. By comparing the detected load with the main load, it can be determined whether the main rope is caught or not, so it is possible to prevent the occurrence of false detection due to the secular change of the elevator. Can be detected. In addition, a memory for storing data detected in the past operation can be eliminated, and the apparatus can be made inexpensive.

Embodiment 1 FIG.
1 is a block diagram showing an elevator provided with an automatic inspection apparatus according to Embodiment 1 of the present invention. In the figure, a car 2 and a counterweight 3 are provided in the hoistway 1 so as to be able to move up and down. In the upper part of the hoistway 1, a hoisting machine (driving device) 4 for raising and lowering the car 2 and the counterweight 3 and a baffle 5 are provided.

  The hoisting machine 4 includes a hoisting machine main body 6 including a motor, and a drive sheave 7 rotated by the hoisting machine main body 6. A plurality of main ropes 8 are wound around the drive sheave 7 and the deflecting wheel 5. One end portion of each main rope 8 is connected to the upper portion of the car 2, and the other end portion of each main rope 8 is connected to the upper portion of the counterweight 3. The car 2 and the counterweight 3 are suspended in the hoistway 1 by the main ropes 8.

  The car 2 has a car room 9 and a car frame 10 that supports the car room 9 in a state of surrounding the car room 9. The car frame 10 is provided with a scale device (load detection device) 11 for detecting the load of the car room 9 as a detection load. The cab 9 is placed on a scale device 11. Therefore, the scale device 11 generates a signal corresponding to the load received from the cab 9. Note that one end of each main rope 8 is connected to the upper portion of the car frame 10 via a cleat device 17.

  A torque current corresponding to the rotational torque of the drive sheave 7 flows through the motor of the hoisting machine body 6. The torque current flowing through the motor is measured by a torque detector (CT) 12 for detecting the rotational torque of the drive sheave 7.

  An operation control device 13 that controls the operation of the elevator is provided in the hoistway 1. The operation control device 13 is equipped with a determination device 14 that determines whether there is an abnormality in the elevator.

  Information from each of the scale device 11 and the torque detection device 12 is transmitted to the determination device 14. Based on the information from the torque detection device 12, the determination device 14 uses the estimated load calculation unit 15 that obtains the estimated value of the load of the car 2 as the estimated load, information from each of the estimated load calculation unit 15 and the scale device 11. And a comparator 16 for determining whether or not the main rope 8 is caught on the equipment in the hoistway 1.

  Here, when the main rope 8 is hooked on the equipment in the hoistway 1, the tension of the main rope 8 becomes larger and the rotational torque of the drive sheave 7 is larger than when the main rope 8 is not hooked. Become. On the other hand, the detection load detected by the scale device 11 is not easily affected by the occurrence of the main rope 8 being caught, and therefore does not change greatly. From this, the presence or absence of the main rope 8 can be determined by comparing the detected load detected by the scale device 11 with the rotational torque of the drive sheave 7.

  Therefore, the comparator 16 compares the estimated load calculated by the estimated load calculation unit 15 with the detected load detected by the scale device 11, and the difference between the estimated load and the detected load is equal to or less than a preset threshold value. In some cases, it is determined that the main rope 8 is not caught, and when the threshold is exceeded, an abnormality is determined that the main rope 8 is caught.

  The control mode of the operation control device 13 can be switched between a normal operation mode and an inspection operation mode in which the car 2 is moved at a lower speed than the speed of the car 2 in the normal operation mode. The operation control device 13 switches from the normal operation mode to the inspection operation mode after the occurrence of the earthquake.

  The operation control device 13 in the inspection operation mode is configured to control the operation of the elevator based on information from the comparator 16. That is, the operation control device 13 automatically returns the inspection operation mode to the normal operation mode when the comparator 16 makes a normal determination in the inspection operation mode, and performs the inspection operation when the comparator 16 makes an abnormality determination in the inspection operation mode. The mode is stopped and the movement of the car 2 and the counterweight 3 is stopped.

  The determination device 14 includes a computer having an arithmetic processing unit (CPU), a storage unit (ROM, RAM, hard disk, etc.) and a signal input / output unit. The functions of the estimated load calculation unit 15 and the comparator 16 are realized by a computer of the determination device 14.

  That is, a control program for realizing the functions of the estimated load calculation unit 15 and the comparator 16 is stored in the storage unit of the computer. The arithmetic processing unit executes arithmetic processing related to the function of the determination device 14 based on the control program.

  Next, the operation will be described. FIG. 2 is a flowchart for explaining the operation of the elevator automatic inspection apparatus shown in FIG. When an earthquake occurs (S 1), the movement of the car 2 and the counterweight 3 is temporarily stopped under the control of the operation control device 13. Thereafter, the control mode of the operation control device 13 is switched from the normal operation mode to the inspection operation mode in order to detect whether the main rope 8 is caught on the equipment in the hoistway 1 (S2). Thereby, the check operation in which the car 2 and the counterweight 3 are moved at a low speed is started (S3).

  During the inspection operation, the information from each of the scale device 11 and the torque detection device 12 is input to the determination device 14 while the car 2 and the counterweight 3 are moved at a low speed. In the determination device 14, an estimated load is obtained by the estimated load calculation unit 15 based on information from the torque detection device 12 (S4). Thereafter, the estimated load calculated by the estimated load calculation unit 15 and the detected load detected by the scale device 11 are compared by the comparator 16 (S5), and the difference between the estimated load and the detected load is equal to or less than the threshold value. It is determined whether or not (S6).

  As a result, when the difference between the estimated load and the detected load is equal to or smaller than the threshold value, the comparator 16 makes a normal determination that the main rope 8 is not caught. As a result, the control mode of the operation control device 13 automatically returns from the inspection operation mode to the normal operation mode (S7).

  On the other hand, when the difference between the estimated load and the detected load exceeds the threshold value, the comparator 16 makes an abnormality determination that the main rope 8 is caught. Accordingly, the inspection operation is stopped by the control of the operation control device, and the movement of the car 2 and the counterweight 3 is stopped (S8).

  In such an elevator automatic inspection device, the estimated load obtained based on the information from the torque detection device 12 that detects the torque current of the hoist 4 and the scale device 11 that detects the load of the car 2 are detected. By comparing the detected load with the comparator 16, it is determined whether or not the main rope 8 is caught. Therefore, it is possible to prevent erroneous detection due to the secular change of the elevator, and to prevent the elevator from being caught by the main rope 8. Abnormalities can be detected more reliably. In addition, a memory for storing data detected in the past operation can be eliminated, and the apparatus can be made inexpensive.

  In addition, since the scale device 11 is mounted on the car 2, it is possible to prevent the detected load detected by the scale device 11 from changing due to the tension fluctuation of the main rope 8. That is, it is possible to prevent the value of the load detected by the scale device 11 from fluctuating depending on whether the main rope 8 is caught. Accordingly, it is possible to more reliably determine whether there is an abnormality due to the main rope 8 being caught.

  Further, in such an elevator automatic inspection method, the load of the car 2 is calculated as an estimated load based on the torque current of the hoisting machine 4 and the car 2 detected by the scale device 11 mounted on the car 2. The detected load is used as the detected load, and the estimated load is compared with the detected load to determine whether there is an abnormality in the elevator. It is possible to detect the abnormality of the elevator due to the catch of 8 more reliably and easily.

Embodiment 2. FIG.
FIG. 3 is a block diagram showing an elevator provided with an automatic inspection device according to Embodiment 2 of the present invention. In the figure, the hoisting machine 4 is provided in the lower part in the hoistway 1. A plurality of main ropes 8 are wound around the drive sheave 7 of the hoisting machine 4. The car 2 and the counterweight 3 are suspended by the main ropes 8.

  A car side return wheel 21 and a counterweight side return wheel 22 around which the main ropes 8 are respectively wound are provided at the upper part in the hoistway 1. Moreover, in the upper part in the hoistway 1, the 1st rope stop device 23 to which the one end part 8a of each main rope 8 was connected, and the 2nd rope stop apparatus 24 to which the other end part 8b of each main rope 8 was connected. And are provided.

  A pair of car suspension wheels 25 is provided at the lower part of the car 2. Further, a counterweight suspension wheel 26 is provided on the upper portion of the counterweight 3.

  Each main rope 8 is wound from one end 8a in the order of each car suspension wheel 25, car side return wheel 21, drive sheave 7, counterweight side return wheel 22, and counterweight suspension wheel 26, and the other end. 8b has been reached. That is, in this example, the winding method of each main rope 8 is a 2: 1 roping method.

  The first rope stopping device 23 is provided with a first weighing device (load detecting device) 27 for detecting the tension of each main rope 8 as a detected load. The first scale device 27 generates a signal corresponding to the tension at the one end 8 a of each main rope 8. Further, the second rope stopping device 24 is provided with a second weighing device (load detection device) 28 for detecting the tension of each main rope 8 as a detection load. The second scale device 28 generates a signal corresponding to the tension at the other end 8 b of each main rope 8.

  Information from each of the first balance device 27, the second balance device 28, and the torque detection device 12 is transmitted to the determination device 14 mounted on the operation control device 13. The determination device 14 is based on information from the torque detection device 12, an estimated load calculation unit 15 that obtains the tension of each main rope 8 as an estimated load, a first scale device 27, a second scale device 28, and an estimated load calculation unit 15. And a comparator 16 for determining whether or not the main rope 8 is caught on the equipment in the hoistway 1 based on the information from each of the above.

  The comparator 16 compares the two detected loads detected by each of the first balance device 27 and the second balance device 28 with the estimated load calculated by the estimated load calculation unit 15, and estimates the two detected loads. When the difference between the load and the load is not more than a preset threshold value, it is determined that the main rope 8 is not caught, and the difference between at least one of the two detected loads and the estimated load is determined. When the value exceeds the threshold value, an abnormality determination is made that the main rope 8 is caught.

  Here, the car 2 is suspended from a portion of the main rope 8 between the drive sheave 7 and the first rope stopping device 23 (hereinafter referred to as “car side main rope portion”). Further, the counterweight 3 is suspended from a portion of the main rope 8 between the drive sheave 7 and the second rope stopping device 24 (hereinafter referred to as “balanced weight side main rope portion”). Therefore, when the car side main rope portion is caught by the equipment in the hoistway 1 (FIG. 3), the rotational torque of the drive sheave 7 increases, but is detected by the second weighing device 28 on the side far from the caught portion. The detected load change is small. Further, when the counterweight side main rope portion is caught on the equipment in the hoistway 1, the rotational torque of the drive sheave 7 rises in the same manner, but is detected by the first weighing device 27 on the side far from the caught portion. The detected load change is small. From this, even if any of the car side main rope portion and the counterweight side main rope portion is caught, the difference between at least one of the two detected loads and the estimated load becomes large, and the main rope 8 It is possible to detect an abnormality caused by catching. Other configurations are the same as those in the first embodiment.

  Next, the operation will be described. The operation is the same as that of the first embodiment until the inspection operation is started.

  During the inspection operation, the car 2 and the counterweight 3 are moved at a low speed, and information from each of the first weighing device 27, the second weighing device 28, and the torque detection device 12 is input to the determination device 14. In the determination device 14, the estimated load is obtained by the estimated load calculation unit 15 based on information from the torque detection device 12. Thereafter, the estimated load calculated by the estimated load calculation unit 15 and the two detected loads detected by the first weighing device 27 and the second weighing device 28 are respectively compared by the comparator 16. Thereby, the presence or absence of the main rope 8 being caught to the apparatus in the hoistway 1 is determined.

  As a result, when the difference between the two detected loads and the estimated load is less than or equal to the threshold value, the comparator 16 determines that the main rope 8 is not caught. As a result, the control mode of the operation control device 13 automatically returns from the inspection operation mode to the normal operation mode.

  On the other hand, if the difference between at least one of the two detected loads and the estimated load exceeds the threshold value, the comparator 16 performs an abnormality determination that the main rope 8 is caught. Accordingly, the inspection operation is stopped by the control of the operation control device, and the movement of the car 2 and the counterweight 3 is stopped.

  In this way, the first scale device 27 is provided in the first rope stopping device 23 to which the one end portion 8a of the main rope 8 for suspending the car 2 and the counterweight 3 is connected, and is connected to the other end portion 8b of the main rope 8. Since the second weighing device 28 is provided in the second rope stopping device 24, even if the main rope 8 is wound in the 2: 1 roping method, the elevator abnormalities due to the main rope 8 being caught. Can be detected more reliably. Further, a memory for storing data detected in the past operation can be eliminated, and the apparatus can be made inexpensive.

  Moreover, in such an elevator automatic inspection method, the tension of the main rope 8 is calculated as an estimated load based on the torque current of the hoisting machine 4, and the first rope stopping device 23 and the second rope stopping device 24 Using the tension of the main rope 8 detected by the first weighing device 27 and the second weighing device 28 provided as the detection load as a detection load, the estimated load and the detection load are compared to determine whether there is an abnormality in the elevator. Since it did in this way, generation | occurrence | production of the misdetection by the secular change of an elevator can be prevented, and abnormality of the elevator by the catch of the main rope 8 can be detected more reliably and easily.

  In the above example, the weighing devices 27 and 28 are provided in the first and second tethering devices 23 and 24, respectively. A scale device may be provided only for the bag.

  That is, for example, when the weighing device is provided only in the first rope stopping device 23, if the car main rope is caught by the equipment in the hoistway 1, the detected load detected by the weighing device and the torque detection device 12 Because there is a difference in absolute value between the estimated load obtained on the basis of the above information or a time difference in tension fluctuation of the main rope 8 occurs between the scale device and the torque detection device 12. The abnormality due to the main rope 8 being caught can be detected. Further, when the counterweight side main rope portion is caught on the equipment in the hoistway 1, the rotational torque of the drive sheave 7 is increased, but the weighing device is provided on the side far from the caught portion. The change in the detected load detected by is small. Thus, the difference between the detected load and the estimated load becomes large, and an abnormality due to the main rope 8 being caught can be detected. Therefore, even if the weighing device is provided only in one of the first rope stopping device 23 and the second rope stopping device 24, an abnormality caused by the main rope 8 being caught can be detected more reliably.

  Moreover, in each said embodiment, although the presence or absence of abnormality by the catch of the main rope 8 is determined, if it is a mobile body which moves with the cage | basket | car 2, it is not limited to the main rope 8, The hoistway 1 It is possible to determine whether or not there is an abnormality due to the moving object being caught by the internal device. Examples of the moving body include a governor rope that moves around as the car 2 moves, a moving cable (control cable) connected between the operation control device and the car 2, and the car 2 and the counterweight 3. And a compen- sion rope that is connected and suspended between the two.

It is a block diagram which shows the elevator provided with the automatic inspection apparatus by Embodiment 1 of this invention. It is a flowchart for demonstrating operation | movement of the automatic inspection apparatus of the elevator of FIG. It is a block diagram which shows the elevator provided with the automatic inspection apparatus by Embodiment 2 of this invention.

Explanation of symbols

  2 cages, 3 counterweights, 4 hoisting machines, 7 drive sheaves, 8 main ropes, 11 weighing devices (load detection devices), 12 torque detection devices, 14 determination devices, 27 first weighing devices (load detection devices), 28 Second weighing device (load detection device).

Claims (1)

One end is connected to the counterweight provided with the counterweight suspension car, the counterweight provided with the counterweight suspension car, and the upper part in the hoistway, and the upper part in the hoistway A main rope for suspending the car and the counterweight, wherein the other end is connected to the second rope stopping device provided on the main rope, and is wound around the car suspension car and the counterweight suspension car. An automatic inspection of an elevator for inspecting the elevator, which is provided in an elevator including a driving sheave around which a main rope is wound, and having a hoisting machine that raises and lowers the car and the counterweight by rotation of the driving sheave A device,
A load detection device that is provided in at least one of the first rope stopping device and the second rope stopping device, and detects the tension of the main rope as a detection load;
Based on the information from the torque detection device for detecting the torque current of the hoisting machine and the torque detection device, the tension of the main rope is obtained as an estimated load, and the load difference between the detected load and the estimated load And whether or not at least one value of the time difference when the detected value fluctuates between the load detecting device and the torque detecting device has reached a predetermined threshold value, An elevator automatic inspection device comprising a determination device for determining whether there is an abnormality.

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