JP5456836B2 - Elevator control device - Google Patents

Description

  Embodiments described herein relate generally to an elevator control device that detects a rope shake accompanying a shaking of a building due to an earthquake, a strong wind, or the like and switches to a control operation.

  When a building is made taller, the natural frequency of the building decreases, so that resonance phenomenon is likely to occur during an earthquake or a strong wind. Here, if the natural frequency of the building matches the natural frequency of the elevator rope (main rope, governor rope, etc.) installed in the hoistway, the rope will shake greatly due to resonance, and the equipment in the hoistway and the elevator There is a risk of contact with the road wall and a so-called “confinement accident”.

  In order to prevent such an accident, recent elevators are equipped with a safety device called a “control operation device”. This means that when a building shakes, it detects a rope runout associated with the building shake and moves the car to a evacuation floor (non-resonant floor) if the runout is greater than a preset threshold. Is a technology to pause.

JP 2008-285334 A JP 2008-74536 A JP 2007-131360 A

  Here, in the system that estimates the amount of rope swing in real time from the amount of shaking of the building and the position of the car, the current amount of rope swing is obtained while sequentially updating the previous amount of rope swing using a predetermined function formula. Go.

  However, when the function of the control device is stopped due to, for example, a power failure or a microcomputer trip, the arithmetic processing is resumed in a state in which the rope runout amount is reset to zero when restarted. For this reason, an error from the true value, that is, the actual rope runout amount becomes large, and there is a possibility that the driving service is restarted in a dangerous state.

  The problem to be solved by the present invention is to provide an elevator control device that can correctly obtain the current rope runout amount in real time at the time of restart and can safely restart the driving service.

  The elevator control device according to the present embodiment includes an elevator control device including a car that moves up and down via a rope installed in a hoistway of the building, and a building shake detection unit that detects the shake of the building. The rope swing estimation means for estimating the rope swing amount in real time based on the building swing amount detected by the building swing detection means and the position of the car, and the rope swing can be attenuated. When the function of the attenuation floor setting means for setting a stable floor as the attenuation floor and the function of the rope runout estimation means is stopped, the rope is moved to the attenuation floor set by the attenuation floor setting means and then the rope Activation control means for restarting the shake estimation means.

FIG. 1 is a diagram illustrating a configuration of an elevator according to an embodiment. FIG. 2 is a block diagram showing a functional configuration of the elevator control device according to the embodiment. FIG. 3 is a diagram showing the relationship between the main rope runout (maximum displacement) on the elevator car side and the car position in the same embodiment. FIG. 4 is a diagram showing the relationship between the main rope runout (maximum displacement) on the counterweight side of the elevator and the car position in the same embodiment. FIG. 5 is a diagram showing the relationship between the deflection (maximum displacement) of the elevator rope and the car position on the elevator car side in the same embodiment. FIG. 6 is a diagram showing the relationship between the deflection (maximum displacement) of the compensation rope on the counterweight side of the elevator and the car position in the same embodiment. FIG. 7 is a flowchart showing a processing operation at the time of building shaking of the elevator control device in the same embodiment. FIG. 8 is a flowchart showing the processing operation at the time of restoration of the elevator control device in the same embodiment. FIG. 9 is a view showing an example in which the car is moved to a common attenuation floor for each rope of the elevator in the same embodiment. FIG. 10 is a diagram illustrating an example in which the car is moved to the attenuation floor unique to each rope of the elevator in the embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of an elevator according to an embodiment. Assume that one elevator 11 is installed in a building 10.

  As shown in FIG. 1, a hoisting machine 12 that is a drive source of the elevator 11 is installed in the uppermost machine room 10 a of the building 10. In the machine roomless type elevator, the hoisting machine 12 is installed in the upper part of the hoistway 10b.

  A main rope 13 is wound around the hoisting machine 12. One end of the main rope 13 is attached to a car 14 and the other end is attached to a counterweight 15. A compensatory 16 is disposed at the lowermost part of the hoistway 10 b, and the end of the compensatory rope 17 is attached to the lower part of the car 14 and the counterweight 15 via the compensatory 16.

  Further, a car control device 18 is provided above the car 14, and controls the opening and closing of the car door 19 when the car 14 is landed on any one of the landings 21a, 21b, 21c. The car control device 18 is connected to a control device 22 (to be described later) through a transmission cable 20 called a tail cord.

  On the other hand, in the machine room 10a or the machine room-less type of the building 10, a control device 22 for controlling the operation of the elevator 11 is installed in the hoistway 10b.

  The control device 22 includes a computer equipped with a CPU, ROM, RAM, and the like, and executes a series of processes relating to operation control of the elevator 11 such as drive control of the hoisting machine 12. In addition, when the building 10 is shaken by an earthquake or strong wind, the control device 22 estimates the rope swing associated with the shaking of the building 10 and controls the door opening / closing of the car 14 based on the estimation result. It has a function to do.

  The “rope swing” means that the rope swings in the horizontal direction when the building 10 swings. In addition, the “rope” referred to here is a rope related to the raising / lowering operation of the car 14, and includes a compen- sion rope 17 in addition to the main rope 13 in the example of FIG. 1.

  Here, an acceleration sensor 23 for detecting the shaking of the building 10 due to an earthquake or a strong wind is installed near the top of the building 10. The acceleration sensor 23 is a biaxial acceleration sensor that can detect the acceleration in the horizontal direction (x direction and y direction) of the building, and outputs a detection signal to the control device 22.

  FIG. 2 is a block diagram showing a functional configuration of the elevator control device 22 in the present embodiment.

  As shown in FIG. 2, the control device 22 includes a rope shake estimation unit 31, an operation control unit 32, a notification unit 33, and a storage unit 34.

  The rope shake estimation unit 31 estimates the rope shake amount based on the shaking amount of the building 10 and the position of the car 14 detected by the acceleration sensor 23. Specifically, the current rope runout amount is estimated in real time while sequentially updating the rope runout amount obtained immediately before using a predetermined function formula. In addition, since the specific calculation method is well-known, the detailed description shall be abbreviate | omitted here. The car position can be detected from a pulse signal output in synchronization with the rotation of the hoisting machine 12 from a pulse generator (not shown) attached to the rotating shaft of the hoisting machine 12.

  The operation control unit 32 controls the operation of the car 14 according to the swing state of the rope. The operation control unit 32 includes an attenuation floor setting unit 32a and an activation control unit 32b.

  The attenuation floor setting unit 32a sets a floor capable of attenuating rope swing as an attenuation floor. The activation control unit 32b moves the car 14 to the attenuation floor set by the attenuation floor setting unit 32a when the function of the rope vibration estimation unit 31 is stopped due to a power failure or the like, for example, and then causes the rope vibration estimation unit 31 to move. restart.

  The notification unit 33 notifies the passenger when the car 14 is moved to the attenuation floor in order to restart the rope swing estimation unit 31 or when the operation of the car 14 is suspended due to a control operation. . Specifically, the notification method includes voice announcement or message display. In addition, you may alert | report using both a voice announcement and a message display. In the present embodiment, a case where notification is given by voice announcement will be described as an example.

  In the car 14, a destination floor button 41, a door open button 42a, a door close button 42b, and a speaker 43 corresponding to each floor are provided. When the user's destination floor is designated by operating the destination floor button 41, the designated destination floor is sent to the control device 22 as a car call. When receiving the car call, the control device 22 moves the car 14 to the floor designated by the user.

  The door opening button 42a is an operation button for the passenger to instruct to open the door, and the door closing button 42b is an operation button for the passenger to instruct to close the door. In addition, the speaker 43 outputs a signal notified by the notification unit 33 by voice.

  In addition, hall call buttons (not shown) are provided at the halls 21a, 21b, 21c. When a hall call (destination direction) is registered by operating the hall call button, the hall call is sent to the control device 22. When receiving the hall call, the control device 22 moves the car 14 to the floor where the hall call is registered.

  Here, the relationship between the rope runout and the car position will be described.

  “Rope” refers to the main rope 13 and the compen- sion rope 17. Specifically, the main rope 13 is divided into a main rope 13a attached to the car 14 side and a main rope 13b attached to the counterweight 15 side. The compensation rope 17 is divided into a compensation rope 17a attached to the car 14 side and a compensation rope 17b attached to the counterweight 15 side.

  The lengths of these ropes 13a, 13b, 17a, 17b vary depending on the position of the car 14. For example, focusing on the main rope 13, when the car 14 is on the lowest floor, the main rope 13a on the car 14 side is the longest, and conversely, the main rope 13b on the counterweight 15 side is the shortest.

  The rope shake estimation unit 31 provided in the control device 22 analyzes the relationship between the rope shake and the car position with respect to the building shake using a predetermined function formula with these ropes 13a, 13b, 17a, and 17b being monitored. .

  Here, FIG. 3 to FIG. 6 show examples of the results of analyzing the relationship between the rope swing and the car position for the ropes 13a, 13b, 17a, and 17b.

  FIG. 3 is a diagram showing the relationship between the deflection (maximum displacement) of the main rope 13a on the car 14 side and the car position. FIG. 4 is a diagram showing the relationship between the deflection (maximum displacement) of the main rope 13b on the counterweight 15 side and the car position.

  The main rope 13a on the side of the car 14 has the characteristic of swinging most when the car 14 is positioned near the lowermost floor, and has less swing when positioned near the uppermost floor from the central floor. On the other hand, the main rope 13b on the counterweight 15 side has the characteristic that it swings most when the car 14 is located near the top floor, and the swing is when the car 14 is located near the bottom floor from the center floor. Few.

  FIG. 5 is a diagram showing the relationship between the deflection (maximum displacement) of the compen- sion rope 17a on the car 14 side and the car position. FIG. 6 is a diagram showing the relationship between the deflection (maximum displacement) of the compen- sion rope 17b on the counterweight 15 side and the car position.

  The compen- sation rope 17a on the side of the car 14 has the characteristic that it swings most when the car 14 is located on the floor slightly above the central floor, and the swing when the car 14 is located below the central floor. Less is. On the other hand, the compen- sion rope 17b on the counterweight 15 side has the characteristic of swinging most when the car 14 is located on the floor slightly below the center floor, and when located on the upper side from the center floor. There is little shake.

  3 to 6 show an example in which the building 10 has a certain amount of shaking, and the amount of shaking of the ropes 13a, 13b, 17a, and 17b is proportional as the amount of shaking of the building 10 increases. And get bigger. Moreover, since the specific method of calculating | requiring the swing amount of rope 13a, 13b, 17a, 17b from the swing amount of the building 10 is well-known, the detailed description shall be abbreviate | omitted.

  Next, the operation of the embodiment will be described.

  FIG. 7 is a flowchart showing the processing operation at the time of building shaking of the elevator control device 22 in the same embodiment.

  When the building 10 shakes due to an earthquake or a strong wind, an acceleration signal corresponding to the amount of shaking of the building 10 is output to the control device 22 from the acceleration sensor 23 installed in the machine room 10a. When the swing of the building 10 is detected (Yes in step S101), the rope swing estimation unit 31 provided in the control device 22 performs the rope based on the swing amount of the building 10 obtained from the acceleration signal and the current car position. Is estimated in real time (step S102). Specifically, for each of the ropes 13a, 13b, 17a, and 17b, the rope swing amount with respect to the swing amount of the building 10 is obtained using a predetermined function formula.

  The estimated value sequentially obtained by the rope runout estimation unit 31, that is, the current rope runout amount is stored in the storage unit 34 (step S103).

  Here, when the amount of rope deflection is equal to or greater than the predetermined amount (step S104 Yes), the operation control unit 32 sets the floor capable of attenuating the rope deflection through the attenuation floor setting unit 32a as the attenuation floor. (Step S105).

  In this case, the attenuation floor setting unit 32a sets a floor with less rope swing as an attenuation floor based on the analysis result of the rope swing characteristic of the rope swing estimation unit 31. That is, as shown in FIG. 3 and FIG. 4, the main rope 13a on the car 14 side has little swing when the car 14 is located near the top floor from the central floor, and the main rope 13a on the counterweight 15 side. In the case of the rope 13b, the swing is small when the car 14 is located from the central floor to the lowest floor.

  Further, as shown in FIG. 5 and FIG. 6, the compen- sion rope 17a on the car 14 side has little vibration when the car 14 is located on the lower side from the center floor, and the counter weight 15 side. In the case of the compen- sion rope 17b, there is little vibration when the car 14 is located on the upper side from the central floor.

  The attenuation floor is obtained from the result of comprehensive analysis of the swing characteristics of these ropes 13a, 13b, 17a, 17b. Generally, since the ropes 13a, 13b, 17a, and 17b have little swing near the center of the building 10, the floor near the center is set as one of the most effective attenuation floors.

  When the attenuation floor is set, the operation control unit 32 moves the car 14 to the attenuation floor with passengers on it, stops the door closing there, and waits for the rope swing to converge (step S106).

  At this time, the notification unit 33 provided in the control device 22 is activated, and a voice announcement such as “Please wait for a while because a building shake is detected” is output from the speaker 43 in the car 14 (step S107). . If the swing of the rope converges and becomes less than a predetermined amount while the car 14 is waiting on the attenuation floor, the operation control unit 32 resumes the operation of the car 14 from the attenuation floor toward the destination floor. Let it run.

  By the way, for example, when the function of the rope shake estimation unit 31 of the control device 22 is stopped due to a power failure or the like, the rope shake amount that has been obtained until then is reset. For this reason, there is a problem that an error occurs between the true value (actual rope runout amount) at the time of restart.

Hereinafter, the processing operation at the time of recovery for solving such a problem will be described.
FIG. 8 is a flowchart showing the processing operation at the time of restoration of the elevator control device 22 in the same embodiment.

  Now, it is assumed that the elevator service including the function of the rope swing estimation unit 31 is restored from a stopped state due to a power failure or the like (Yes in step S201). At this time, it is assumed that the car 14 is stopped at an arbitrary floor.

  When the elevator operation service is restored, the activation control unit 32b of the control device 22 first determines the function stop time of the rope shake estimation unit 31a (step S202). As a result, when the function stop time of the rope shake estimation unit 31a is within the predetermined time (Yes in Step S202), the activation control unit 32b determines that the rope shake estimation unit 31 can be restarted, The rope shake amount immediately before the rope shake estimation unit 31 stops is read from the storage unit 34 (step S203). In addition, the said predetermined time is set supposing the function stop of a short time like the time of an instantaneous power failure, for example.

  The activation control unit 32b gives the rope deflection amount read from the storage unit 34 to the rope deflection estimation unit 31 and restarts it (step S204). The rope shake estimation unit 31 resumes the calculation process from the rope shake amount immediately before the rope shake estimation unit 31 stops, and outputs the rope shake amount sequentially obtained as the calculation result as the current rope shake amount.

  In this way, if the function is stopped for a short period of time, the rope runout amount obtained immediately before the stop can be used to correctly calculate the subsequent rope runout amount. Driving service can be resumed safely.

  On the other hand, when the function stop time of the rope swing estimation unit 31 exceeds the predetermined time (step S202), the start control unit 32b restarts based on the stop position of the car 14 and the amount of shaking of the building 10. Judgment is made (steps S205 and S206).

  Here, when the stop position of the car 14 is the resonance floor (Yes in Step S205) and the amount of shaking of the building exceeds a predetermined amount (Yes in Step S206), the activation control unit 32b cannot be restarted. The operation service of the elevator (car 14) is suspended (step S207).

  The “resonance floor” is a floor where the rope swings in resonance with the shaking of the building 10. As shown in FIGS. 3 to 6, in the case of the main rope 13a on the car 14 side, the vicinity of the lowest floor corresponds to the resonance floor. In the case of the main rope 13b on the counterweight 15 side, the vicinity of the top floor corresponds to the resonance floor. In the case of the compen- sion rope 17a on the car 14 side, the floor slightly above the center floor corresponds to the resonance floor. In the case of the compen- sion rope 17b on the counterweight 15 side, the floor slightly below the center floor corresponds to the resonance floor.

  When the car 14 stops at the resonance floor, the rope swings greatly due to the resonance phenomenon. The swing amount of the rope at this time depends on the swing amount of the building 10, and the greater the swing amount of the building 10, the greater the swing amount of the rope, and the higher the possibility of being entangled with the equipment in the hoistway. Therefore, it is preferable to ensure safety by stopping the operation service.

  On the other hand, if the car 14 is stopped on a floor other than the resonance floor (No in step S205) or if the amount of shaking of the building 10 is other than a predetermined amount (No in step S206), the activation control unit 32b determines that restart is possible, and once the car 14 is moved to an attenuation floor where the rope runout can be attenuated (step S208), the rope runout amount preset in the rope runout estimation unit 31 is set. The initial value is preset and restarted (step S209).

  Note that the “floor other than the resonance floor” referred to in step S205 is a floor where there is little rope fluctuation due to the resonance phenomenon, that is, a non-resonance floor. On the other hand, the “attenuating floor” is a floor capable of attenuating rope runout and includes a non-resonant floor. The “attenuating floor” is not limited to a floor where passengers can get on and off, and may be a certain position between floors as long as the rope swing can be attenuated. Similarly, “resonance floors” and “floors other than the resonance floors” are not limited to floors on which passengers can get on and off, and may be between floors or at specific positions.

  As shown in FIGS. 3 to 6, in the main rope 13a on the car 14 side, the vicinity of the top floor corresponds to the attenuation floor. In the case of the main rope 13b on the counterweight 15 side, the vicinity of the lowest floor corresponds to the attenuation floor. In the case of the compen- sion rope 17a on the car 14 side and the compen- sion rope 17b on the counterweight 15 side, the vicinity of the center floor corresponds to the attenuation floor.

  As already described, the attenuation floor is obtained from the result of comprehensive analysis of the swing characteristics of these ropes 13a, 13b, 17a, 17b. Generally, since the ropes 13a, 13b, 17a, and 17b have little swing near the center of the building 10, the floor near the center is set as one of the most effective attenuation floors.

  FIG. 9 shows an example in which the car 14 is moved to an attenuation floor common to the ropes 13a, 13b, 17a, and 17b.

  For example, in the building 10 on the 1st to 60th floors, it is assumed that the car 14 is stopped on the 15th floor. Here, if the attenuation floor common to the ropes 13a, 13b, 17a, and 17b is set to the 30th floor, the car 14 is moved from the 15th floor to the 30th floor upon restoration.

  When the car 14 is moved to the 30th floor which is the attenuation floor, the resonance phenomenon does not occur, so that the swings of the ropes 13a, 13b, 17a and 17b gradually converge. Therefore, if the rope runout estimation unit 31 is preset with the initial value of the rope runout after a certain period of time (after the time required for the convergence of the rope runout) and restarted, the rope runout is calculated from a state close to the current state. You can continue. As a result, an error from the true value (actual rope runout amount) can be minimized, and an accurate rope runout amount can be obtained in real time.

  In step S205, if the car 14 is stopped on a floor other than the resonance floor and the stop floor is an attenuation floor, the car 14 does not need to be moved, and after a certain time in the same place. Assume that the rope runout estimation unit 31 is restarted.

  In step S208 described above, the car 14 is moved to the common attenuation floor for the ropes 13a, 13b, 17a, and 17b, and waits for each swing to gradually converge. Alternatively, the ropes 13a, 13b, 17a, and 17b may be moved to their respective attenuation floors to forcibly converge each runout.

  FIG. 10 shows an example in which the car 14 is moved to the attenuation floor unique to each of the ropes 13a, 13b, 17a, and 17b.

  For example, in the building 10 on the 1st to 60th floors, it is assumed that the car 14 is stopped on the 15th floor. Here, it is assumed that the 60th floor of the uppermost floor is set as the attenuation floor of the main rope 13a on the passenger car 14 side, and the first floor of the lowermost floor is set as the attenuation floor of the main rope 13b on the counterweight 15 side. Further, it is assumed that the 30th floor of the central floor is set as the attenuation floor of the compen- sion rope 17a on the car 14 side and the compen- sion rope 17b on the counterweight 15 side.

  In such a case, in order to move the car 14 to the attenuation floor specific to each of the ropes 13a, 13b, 17a, 17b, the car 14 is first moved to the first floor of the lowest floor. The reason for moving to the first floor first is that it is a floor closer to the current position (15th floor) and an attenuation floor related to the main rope 13.

  That is, when comparing the amount of swing of the main rope 13 and the amount of swing of the compen- sion rope 17 that are monitored in the present embodiment, the amount of swing of the main rope 13 is much larger. Therefore, first, the car 14 is moved to an attenuation floor effective for attenuating the swing of the main rope 13 (specifically, the swing of the main rope 13a on the car 14 side and the swing of the main rope 13b on the counterweight 15 side). It is preferable.

  When the car 14 is moved to the first floor of the lowest floor, the length of the main rope 13b on the counterweight 15 side becomes the shortest, so that the deflection is forcibly converged. Subsequently, the car 14 is moved to the 60th floor of the top floor. As a result, the main rope 13a on the side of the car 14 becomes the shortest, so that the deflection is forcibly converged.

  Finally, the car 14 is moved to the 30th floor to forcibly converge the swing of the compen- sion rope 17a on the car 14 side and the compen- sion rope 17b on the counterweight 15 side. Preset and restart.

  In this way, if the car 14 is moved to a specific attenuation floor for each of the ropes 13a, 13b, 17a, and 17b, all the rope swings are forcibly converged, and the calculation of the rope swing amount is further performed. You can resume early.

  According to at least one embodiment described above, it is possible to provide an elevator control device that can correctly obtain the current rope runout amount in real time at the time of restart and can safely restart the driving service.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Building, 11 ... Elevator, 12 ... Hoisting machine, 13, 13a, 13b ... Main rope, 14 ... Ride car, 15 ... Counter weight, 16 ... Compensation, 17, 17a, 17b ... Compen rope, 18 ... Car Control device, 19 ... car door, 20 ... transmission cable, 21a, 21b, 21c ... landing, 22 ... control device, 23 ... acceleration sensor, 31 ... rope runout estimation unit, 32 ... operation control unit, 32a ... attenuation floor setting unit , 32b ... Activation control unit, 33 ... Notification unit, 34 ... Storage unit, 41 ... Destination floor button, 42a ... Door open button, 42b ... Door close button, 43 ... Speaker.

Claims (8)

In an elevator control device equipped with a car that moves up and down via a rope installed in a hoistway of a building,
Building shaking detection means for detecting the shaking of the building,
Rope swing estimation means for estimating the amount of swing of the rope in real time based on the amount of swing of the building detected by the building swing detection means and the position of the car;
Attenuation floor setting means for setting a floor capable of attenuating the swing of the rope as an attenuation floor,
An activation control means for restarting the rope shake estimation means after moving the car to the attenuation floor set by the attenuation floor setting means when the function of the rope shake estimation means is stopped; An elevator control device characterized by the above. Storage means for storing the amount of rope swing estimated by the rope swing estimation means;
The activation control means includes
If the function stop time of the rope swing estimation means is within a predetermined time, the rope swing amount immediately before the function stop stored in the storage means is stored in the rope swing without moving the car to the attenuation floor. 2. The elevator control apparatus according to claim 1, wherein the control means is restarted by giving to the estimation means. The activation control means includes
2. The restartability determination is made based on the stop position of the car and the amount of shaking of the building when the function stop time of the rope swing estimation means exceeds a predetermined time. The elevator control device described. The activation control means includes
If the stop position of the car is other than the resonance floor where the rope swings in resonance with the shaking of the building, or if the amount of shaking of the building is less than a predetermined amount, it is determined that the vehicle can be restarted. 4. The elevator control apparatus according to claim 3, wherein the rope run-out estimating means is restarted after the car is moved to the attenuation floor set by the attenuation floor setting means. The activation control means includes
If the stop position of the car is at the resonance floor where the rope swings in resonance with the shaking of the building, and the amount of shaking of the building exceeds a predetermined amount, it is determined that the vehicle cannot be restarted, and the operation is suspended The elevator control device according to claim 3, wherein The activation control means includes
When there are a plurality of ropes to be monitored and an attenuation floor is set for each of the ropes by the attenuation floor setting means, the rope is moved to a common attenuation floor for each rope, and then 2. The elevator control device according to claim 1, wherein the rope swing estimation means is restarted. The activation control means includes
When there are a plurality of ropes to be monitored and an attenuation floor is set for each of the ropes by the attenuation floor setting means, the rope runout after the cage is moved to the attenuation floor of each rope 2. The elevator control device according to claim 1, wherein the estimating means is restarted.   When the rope to be monitored includes a main rope that is wound around a hoisting machine and moves the car up and down, the car is placed on an attenuation floor that is effective to attenuate the swing of the main rope. The elevator control device according to claim 7, wherein the elevator control device is moved preferentially.

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