JP4828215B2 - Elevator control device - Google Patents

Description

  The present invention relates to an elevator control device having an inspection operation control unit that automatically checks the presence or absence of an abnormality by causing the car to automatically travel after the car has been stopped due to an earthquake, for example.

  In a conventional elevator operation control system for an earthquake, when it is confirmed that no passengers remain in the car after the car is stopped due to the earthquake, the car inspection operation is started. In the inspection operation, the presence or absence of abnormal noise or abnormal vibration is confirmed by an abnormality detection device provided on the car (see, for example, Patent Document 1).

JP-A-8-301545

  With the conventional seismic control operation device as described above, for example, even if a governor rope or main rope is caught, it is not known which part is caught, and it takes time for maintenance personnel to find the caught part. , It takes a long time to recover.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an elevator control device that can shorten the time required for recovery when a cord-like body is caught. .

  The elevator control device according to the present invention determines the presence or absence and a hooked portion of a cord-like body in a hoistway based on signals input from a plurality of elevator devices during an inspection operation, and displays the determination result The inspection operation control unit that outputs the above signal is used.

  The elevator control device according to the present invention determines a hooked portion of the cord-like body based on signals input from a plurality of elevator devices during the inspection operation, and outputs a signal for displaying the determination result. Can quickly find the hooked portion, and the time required for recovery can be shortened.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a hoisting machine 1 is installed at the lower part of the hoistway. The hoist 1 includes a drive sheave, a motor that rotates the drive sheave, and a brake that brakes the rotation of the drive sheave. Further, the hoisting machine 1 is provided with a hoisting machine encoder 2 as a rotation detector that generates a signal corresponding to the rotation of the rotating shaft of the hoisting machine 1.

  A plurality of main ropes 3 (only one is shown in the figure) are wound around the drive sheave. The car 4 and the counterweight 5 are suspended in the hoistway by the main rope 3 and are raised and lowered by the driving force of the hoisting machine 1. The main rope 3 has first and second end portions 3a and 3b. The 1st and 2nd edge part 3a, 3b is connected to the rope stop part provided in the upper part of the hoistway.

  Car suspension wheels 6 a and 6 b are mounted on the lower portion of the car 4. On the upper part of the counterweight 5, a counterweight suspension vehicle 7 is mounted. First and second return wheels 8 and 9 are provided at the upper part of the hoistway. The main rope 3 is wound around the car suspension wheels 6a, 6b, the first return wheel 8, the drive sheave, the second return wheel 9, and the counterweight suspension wheel 7 in order from the first end 3a side. ing. That is, the car 4 and the counterweight 5 are suspended in the hoistway by a 2: 1 roping method.

  A speed governor 10 is installed in the upper part of the hoistway. The governor 10 is provided with a governor sheave, an overspeed detection switch, a rope catch, and the like. A governor rope 11 is wound around the governor sheave. Both ends of the governor rope 11 are connected to an operation mechanism 12 of an emergency stop device (not shown) mounted on the car 4. The lower end portion of the governor rope 11 is wound around a tension wheel 13 arranged at the lower part of the hoistway.

  When the car 4 is raised and lowered, the speed governor rope 12 is circulated, and the speed governor sheave is rotated at a rotational speed corresponding to the traveling speed of the car 4. In the governor 10, it is mechanically detected that the traveling speed of the car 4 has reached an overspeed. Further, the governor 10 is provided with a governor encoder 14 as a rotation detector that generates a signal corresponding to the rotation of the governor sheave.

  A scale device 15 that generates a signal (weighing signal) corresponding to the load in the car 4 is provided at the rope stop to which the first end 3 a of the main rope 3 is connected. A sound collecting microphone 16 for detecting abnormal sounds in the hoistway is mounted on the car 4.

  The operation of the hoist 1 is controlled by the elevator control device 17. Signals from the hoisting machine encoder 2, the governor encoder 14, the scale device 15, and the sound collecting microphone 16 are input to the elevator control device 17. The elevator control device 17 includes an inspection operation control unit 18 that automatically travels the car 4 to check whether there is an abnormality.

  The elevator control device 17 has a computer having an arithmetic processing unit (CPU), a storage unit (ROM, RAM, hard disk, etc.) and a signal input / output unit. The function of the inspection operation control unit 18 is realized by a computer. That is, the storage unit of the computer stores a control program for realizing the function of the inspection operation control unit 18 (including a processing algorithm for estimating a catching portion). The arithmetic processing unit executes arithmetic processing related to the function of the inspection operation control unit 18 based on the control program.

  Here, in the example of FIG. 1, the main rope 3 and the governor rope 11 can be exemplified as a cord-like body that may be caught due to an earthquake shake or the like. These cords can be divided into first to ninth portions 21 to 29.

  That is, the first portion 21 is a portion from the second end 3 b of the main rope 3 to the counterweight suspension wheel 7. The second portion 22 is a portion from the counterweight suspension vehicle 7 of the main rope 3 to the second return wheel 9. The third portion 23 is a portion from the second return wheel 9 of the main rope 3 to the drive sheave. The fourth portion 24 is a portion from the drive sheave of the main rope 3 to the first return wheel 8. The fifth portion 25 is a portion from the first return wheel 8 of the main rope 3 to the car suspension wheel 6b. The sixth portion is a portion from the car suspension wheel 6a of the main rope 3 to the first end portion 3a.

  The seventh portion 27 is a portion that is connected to the car 4 of the governor rope 11 and that is above the operation mechanism 12 that is a connecting portion. The eighth portion 28 is a portion below the operation mechanism 12 on the side connected to the car 4 of the governor rope 11. The ninth portion is a portion of the governor rope 11 that is not connected to the car 4. FIG. 1 shows a state in which the eighth portion 28 is caught by a catching portion 19 such as a hoistway device.

  The inspection operation control unit 18 determines the presence / absence and a portion of the hook in the hoistway based on signals input from a plurality of elevator devices during the inspection operation, and displays a determination result. Is output. Specifically, the inspection operation control unit 18 determines the hooked portion of the cord-like body based on the traveling direction of the car 4, the torque signal of the hoisting machine 1, and the weighing signal from the weighing device 15.

  Next, the inspection operation will be described. When the car 4 is stopped at the nearest floor due to an earthquake or the like, the inspection operation control unit 18 does not detect the shaking of the earthquake and starts the inspection operation after confirming that no passengers remain in the car 4. . In the inspection operation, the car 4 travels at an ultra-low speed (for example, 4 m / min or less) that is slower than the low-speed operation (for example, 15 m / min) at the time of normal inspection in order to avoid damaging the equipment due to the hooking of the cord. Is done.

  FIG. 2 is a block diagram showing a state in which the car 4 of FIG. If the eighth portion 28 is a catch portion, the car 4 cannot travel downward from the state of FIG. 2, the car 4 becomes lighter, and the load detected by the scale device 15 decreases. Further, when the car 4 becomes lighter in weight, the weight difference between the car 4 and the counterweight 5 increases, and the torque of the hoist 1 necessary to support the counterweight 5 increases.

  FIG. 3 is a graph showing changes in the hoisting machine current and the scale signal when the car 4 of FIG. 1 is run to the position of FIG. In FIG. 3, when the hoisting machine current exceeds the abnormality detection level and the scale signal becomes equal to or less than the abnormality detection level, the inspection operation control unit 18 determines that a catch is occurring in the eighth portion 28. .

  FIG. 4 is a graph showing changes in the hoisting machine current and the weighing signal when the first portion 21 in FIG. 1 is caught. When the first portion 21 is caught, the hoisting machine 1 tries to rotate even though the counterweight 5 cannot move upward from the catching portion, so that the torque current of the hoisting machine 1 increases. . However, since the tension of the fourth to sixth portions 24 to 26 does not change, the scale signal does not change. Such a situation is the same when the second portion 22 is caught.

  FIG. 5 is an explanatory diagram showing a criterion for determining a hooked portion by the inspection operation control unit 18 of FIG. In the storage unit of the elevator control device 17, such determination criteria and abnormality detection levels are set and registered in advance.

  FIG. 6 is a flowchart showing the operation of the inspection operation by the inspection operation control unit 18 of FIG. When the inspection by the inspection operation is started, the car position and the operation direction are first confirmed (step S1). Thereafter, it is confirmed whether or not the torque current exceeds the abnormality detection level (step S2) and whether or not the weighing current exceeds the abnormality detection level (step S3). If none of them exceeds the abnormality detection level, the inspection operation is continued while monitoring the torque current and the scale current (step S4).

  When at least one of the torque current and the weighing current exceeds the abnormality detection level, it is determined that the catch has occurred, and the traveling of the car 4 is stopped (step S5). Thereafter, the hooked portion is determined by the method as described above (step S6). Then, the maintenance center is notified of the occurrence of the catch, and if the catch portion is identified, the information on the identified catch portion is reported to the maintenance center (step S7). Or, if either the torque current or the scale current exceeds the abnormality detection level, but the other does not exceed, the inspection operation speed is reduced and the inspection is continued, and the level of the detected value that exceeds the abnormality detection level If it rises further, or the other detected value starts to rise, it may be determined that it is caught. In this way, erroneous determination can be reduced.

  According to such an elevator control device 17, the hooked portion of the cable-like body is determined based on signals input from a plurality of elevator devices during the inspection operation, and a signal for displaying the determination result is output. The maintenance staff can quickly find the hooked portion, and the time required for recovery can be shortened. In addition, since maintenance personnel can specify and prepare maintenance parts corresponding to the hooked part to the site, the time required for recovery can be shortened.

In the above example, the information on the hooked portion is reported to the maintenance center, but may be displayed on, for example, the control panel or operation panel of the elevator apparatus.
In the above example, the first, second and eighth portions 21, 22, and 28 are determined to be caught. However, by adding a determination criterion as shown in FIG. It is also possible to determine.
Furthermore, in the above example, the case where the inspection operation is performed in the downward direction has been described. However, the hooked portion may be determined by the inspection operation in the upward direction.
Furthermore, in the above example, the main rope 3 and the governor rope 11 are shown as the cords for which the hooked portion is to be determined. However, the present invention is not limited to these. A compensation rope (balance rope) or the like may be used.

  In addition, the elevator device that receives the signal to be used for determining the hooked portion is not limited to the above example. For example, FIG. 7 is an explanatory diagram illustrating another example of a determination criterion for determining a hooked portion by the inspection operation control unit 18 of FIG. In the determination criterion of FIG. 7, the determination target is the same as that of FIG. 5, but the determination accuracy is improved by increasing the number of signals to be handled. Specifically, in addition to the hoisting machine torque and the scale signal, the difference between the output from the hoisting machine encoder 2 and the output from the governor encoder 14 is confirmed.

  For example, when the car 4 is inspected downward, if the first or second portion 21 or 22 is caught, the car 4 and the counterweight 5 will not move. There is no difference in the amount of movement from the governor encoder 14. However, when the eighth portion 28 is caught, the tension of the fourth to sixth portions 24 to 26 is loosened, so that the movement amount of the governor encoder 14 is larger than the movement amount of the hoisting machine encoder 2. It becomes smaller and the difference in output becomes positive. Thus, the accuracy of determination can be improved by increasing the items of determination.

Embodiment 2. FIG.
Next, FIG. 8 is a block diagram showing an elevator apparatus according to Embodiment 2 of the present invention, and FIG. 9 is a block diagram showing a state in which the car 4 of FIG. The inspection operation control unit 18 determines in advance the normal weights of the main rope 3 and the control cable (not shown) that constantly change according to the car position with respect to the hoisting machine torque signal and the scale signal. It is memorized, and a correction calculation is performed to remove the influence caused by the inspection operation. Further, the inspection operation control unit 18 averages (or low-pass filter processing) the output value after the correction calculation every predetermined time to obtain a value that smoothly changes.

  FIG. 10 is a graph showing a result of performing a correction calculation on the output of the hoisting machine current shown in FIG. 4, and FIG. 11 is a graph showing a result of performing an averaging process on the calculation result of FIG. The inspection operation control unit 18 obtains a change from the previous confirmation point for each car movement distance (movement time) set in advance for the hoisting machine current after the averaging process as shown in FIG. If the hoisting machine current changes in the same direction by a preset number of times or more, it is determined that a catch has occurred even if the abnormality detection level is not exceeded, and the car 4 Stop. For example, in FIG. 11, the detection levels at T1, T2, and T3 continuously increase three times in the same direction. In such a case, the absolute value of the detection level is small but continuously increased. It is judged that it is caught. Other configurations are the same as those in the first embodiment.

  FIG. 12 is a flowchart showing a catch detection operation by the inspection operation control unit 18 of FIG. When the inspection by the inspection operation is started, first, the car position and the operation direction are confirmed (step S11). Then, the hoisting machine current is detected (step S12), and correction calculation processing (step S13) and averaging processing (step S14) are performed. Then, it is confirmed whether or not the hoisting machine current after averaging exceeds the abnormality detection level (step S15).

  If the hoisting machine current exceeds the abnormality detection level, it is determined that a catch has occurred, and the traveling of the car 4 is stopped (step S16). If the hoisting machine current does not exceed the abnormality detection level, it is confirmed whether the moving distance of the car 4 from the previous confirmation point has reached the set amount (step S17). If the set amount is not reached, the comparison with the abnormality detection level is continued while continuing the hoisting machine current detection, the correction calculation process, and the averaging process.

  When the car 4 moves a set amount from the previous confirmation point, a change in the hoisting machine current from the previous confirmation point is obtained, and it is confirmed whether or not the change is abnormal (step S18). Then, if the change more than the set amount continues in the same direction by the set number of times, it is determined that the catch has occurred, and the traveling of the car 4 is stopped. If the change in the hoisting machine current is within the normal range, the above operation is repeated. Further, the determination of the hook portion at the time of the hook detection can be performed in the same manner as in the first embodiment.

According to such an elevator control device 17, even when the strength is low like the governor rope 11 and the signal fluctuation is small when the catch occurs, the catch can be detected more reliably and early.
Further, by performing the correction calculation process, it is possible to more reliably detect the signal fluctuation due to the catch.
Furthermore, by performing the averaging process, it is possible to prevent erroneous detection due to temporary signal fluctuations and improve the detection accuracy of the catch.

  Note that correction calculation processing and averaging processing may be omitted, and signal processing can be simplified.

Embodiment 3 FIG.
Next, FIG. 13 is a block diagram showing an elevator apparatus according to Embodiment 3 of the present invention, and FIG. 14 is a block diagram showing a state in which the car 4 of FIG. In the figure, the operating mechanism 12 is connected to the governor rope 11 via first and second springs 31 and 32. The first and second springs 31 and 32 are used to prevent the governor 10 from erroneously detecting overspeed due to the swing of the car 4 due to mischief or the like. The operation mechanism 12 is provided with first and second detection switches 33 and 34 which are operated when the deformation amount of the first and second springs 31 and 32 reaches a set amount due to a change in tension of the governor rope 11. It has been.

  Based on the signals from the first and second detection switches 33 and 34, the inspection operation control unit 18 determines that the hook is generated and determines that the hook portion is the governor rope 11.

  In this way, the hooked portion can be determined by the signals from the switches 33 and 34 provided at the connecting portion between the governor rope 11 and the car 4.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a block diagram which shows the state which made the cage | basket | car of FIG. 1 run below by inspection driving | operation. It is a graph which shows the change of the winding machine electric current when the car of FIG. 1 is made to drive | work to the position of FIG. It is a graph which shows the change of the hoisting machine electric current when the hook generate | occur | produces in the 1st part of FIG. 1, and a scale signal. It is explanatory drawing which shows the criterion for determining a catching part by the inspection driving | operation control part of FIG. It is a flowchart which shows the operation | movement of the check operation by the check operation control part of FIG. It is explanatory drawing which shows the other example of the criterion for determining a catching part by the inspection driving | operation control part of FIG. It is a block diagram which shows the elevator apparatus by Embodiment 2 of this invention. It is a block diagram which shows the state which made the cage | basket | car of FIG. 8 run upwards by inspection operation. It is a graph which shows the result of having performed correction | amendment calculation to the output of the winding machine current shown in FIG. It is a graph which shows the result of having averaged the calculation result of FIG. It is a flowchart which shows the detection operation | movement by the inspection driving | operation control part of FIG. It is a block diagram which shows the elevator apparatus by Embodiment 3 of this invention. It is a block diagram which shows the state which made the cage | basket | car of FIG.

Explanation of symbols

1 hoisting machine, 2 hoisting machine encoder (rotation detector), 3 main rope (cord), 4 cage, 10 governor, 11 governor rope (cord), 14 governor encoder (rotation detection) Equipment), 15 scale device, 17 elevator control device, 18 inspection operation control unit.

Claims (7)

Provided in an elevator apparatus comprising a car, a main rope for suspending the car, a governor rope connected to the car, and a plurality of vehicles around which the main rope or the governor rope is wound. In the elevator control device provided with an inspection operation control unit that automatically runs the above-mentioned car and checks whether there is an abnormality,
The inspection operation control unit, during the inspection operation, based on the traveling direction of the car, the torque signal of the hoisting machine, and the weighing signal from the weighing device that detects the load in the car, An elevator control device characterized by detecting a catch of a predetermined portion among a plurality of portions of the main rope and the governor rope divided by a vehicle and outputting a signal for displaying a detection result. The car is provided with a car suspension car provided in the car, a counterweight suspension car provided in a counterweight, a drive sheave provided in the hoist, and an upper part of a hoistway. Including first and second return wheels,
The main rope has first and second end portions connected to a rope stopping portion provided at an upper portion of the hoistway, and the car is sequentially from the first end side. It is wound around a suspension car, the first return wheel, the drive sheave, the second return wheel, and the counterweight suspension car,
The inspection operation control unit causes the second current of the main rope to be increased when the torque current of the hoisting machine increases and the scale signal does not change when the car travels downward in the inspection operation. 2. It is determined that a portion of the main rope from the counterweight suspension vehicle or a portion of the main rope from the counterweight suspension vehicle to the second return wheel has been caught. The elevator control device described. The vehicle includes a governor sheave provided in the upper part of the hoistway and a tension wheel provided in the lower part of the hoistway,
The governor rope is wound around the governor sheave and the tension wheel,
The inspection operation control unit is configured to control the speed control when the load detected by the scale device decreases and the hoisting machine torque increases when the car travels downward in the inspection operation. 2. The elevator control device according to claim 1, wherein it is determined that a portion of the machine rope between the connecting portion of the cage and the tensioning wheel is caught. The inspection operation control unit further includes the main rope and the speed governor based on a difference between a signal from a rotation detector provided in the hoist and a signal from a rotation detector provided in the speed governor. elevator control apparatus according to claim 1, wherein the detecting the caught of the predetermined portion of the machine rope. The elevator according to any one of claims 1 to 4 , wherein the inspection operation control unit reports information on a hook portion of the main rope and the governor rope to a maintenance center. Control device. Upper Symbol inspection operation control unit, during the inspection operation, obtains the change in the signal values from the previous check point for each preset squirrel movement distance, the number of times that is set in advance, preset change amount or more, the same The elevator control device according to any one of claims 1 to 5, wherein when the signal value changes in a direction, it is determined that a catch has occurred. The elevator control apparatus according to claim 6 , wherein the inspection operation control unit performs a process of averaging signal values input from the elevator equipment every predetermined time.

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