JP5535352B1 - elevator - Google Patents

Abstract

In the prior art, for example, there is room for further improvement in terms of operation during a power failure.
An elevator according to an embodiment includes a basket that can move up and down a hoistway and a control device. The control device can be switched between a normal operation in which the car is raised and lowered by power from a power source and a power failure operation in which the car is raised and lowered by power from a power storage device when the power source is powered down. . The controller responds to the registered call when a call is registered in the car when the power supply for power is restored from the power failure while the operation is performed at the time of the power failure. If the expected lifting distance at the time is longer than the preset normal operation return determination distance, the operation at the time of power failure is continued. The control device returns to the normal operation from the operation at the time of power failure when the predicted ascending / descending distance is equal to or less than the normal operation return determination distance.
[Selection] Figure 1

Description

  Embodiments described herein relate generally to an elevator.

  Conventionally, an elevator moves a car (car) to an arbitrary floor when the car moves in the hoistway. Such an elevator may execute control for driving a car by using battery power during a power failure.

JP 2006-290501 A

  By the way, in a prior art, there exists room for the further improvement in the point of the driving | operation at the time of a power failure, for example.

  The elevator according to the embodiment includes a basket capable of moving up and down a hoistway and a control device. The control device can be switched between a normal operation in which the car is raised and lowered by power from a power source and a power failure operation in which the car is raised and lowered by power from a power storage device when the power source is powered down. . The controller responds to the registered call when a call is registered in the car when the power supply for power is restored from the power failure while the operation is performed at the time of the power failure. If the expected lifting distance at the time is longer than the preset normal operation return determination distance, the operation at the time of power failure is continued. The control device returns to the normal operation from the operation at the time of power failure when the predicted ascending / descending distance is equal to or less than the normal operation return determination distance.

FIG. 1 is a block diagram illustrating a schematic configuration example of an elevator according to the embodiment. FIG. 2 is a flowchart illustrating an example of control in the elevator according to the embodiment. FIG. 3 is a flowchart for explaining an example of control in the elevator according to the modification.

[Embodiment]
FIG. 1 is a block diagram illustrating a schematic configuration example of an elevator according to the embodiment. FIG. 2 is a flowchart illustrating an example of control in the elevator according to the embodiment. FIG. 3 is a flowchart for explaining an example of control in the elevator according to the modification.

  As shown in FIG. 1, the elevator 1 of the present embodiment typically has an elevator power source that can perform continuous operation during a power failure as a power failure operation using a battery 12 as a power storage device even in a power failure state. It is also a backup system. The elevator 1 can be operated by power from the power source 50 and power from the battery 12.

  The elevator 1 includes a basket 2, a counterweight 3, a main rope 4, a hoisting machine 5, a control device 10, and the like. The elevator 1 is a so-called elevator type elevator in which a car 2 and a counterweight 3 are connected by a main rope 4. The elevator 1 is provided with a landing 6.

  The basket 2 can move up and down a hoistway 7 provided in the building. The basket 2 includes a basket call registration device 8, a load detector 2a, and the like. The basket call registration device 8 is provided inside the basket 2. The basket call registration device 8 performs so-called basket call registration and the like in response to an operation input by the user. The load detector 2a detects the loaded load in the basket 2.

  The counterweight 3 is a counterweight for the cage 2.

  The main rope 4 is hung on the main sheave 5a, the deflecting sheave 5b, etc. of the hoisting machine 5 provided in the upper part (or machine room etc.) of the hoistway 7. The main rope 4 has a cage 2 connected to one end and a counterweight 3 connected to the other end.

  The hoisting machine 5 includes, for example, an electric motor (motor) 5c that generates power. Electric power is supplied to the electric motor 5c from the power source 50 and the battery 12 via the control device 10 and the like. In the hoisting machine 5, when the electric motor 5c is driven, the main sheave 5a connected to the electric motor 5c is rotationally driven. The hoisting machine 5 uses the friction force generated between the main sheave 5a and the main rope 4 to wind up the main rope 4 electrically. Moreover, the electric motor 5c can also perform regenerative power generation. That is, the electric motor 5c is a so-called rotating electric machine, and functions as a motor (power running function) that converts supplied electric power into mechanical power, and functions as a generator that converts input mechanical power into electric power. (Regenerative function).

  The landing 6 is provided on each elevator stop floor where the car 2 can land. Each hall 6 includes a hall call registration device 9 and the like. The hall call registration device 9 performs so-called hall call registration according to an operation input by the user.

  The control device 10 of the present embodiment includes an operation control device 11, a battery 12 as a power storage device, a power supply control device 13, and the like.

  The operation control device 11 includes a CPU (central processing unit), a ROM, a RAM, a backup RAM, a microcomputer having an input / output port device, and a drive circuit that are connected to each other by a bidirectional common bus of a normal type. Yes. A ROM (Read Only Memory) stores a predetermined control program and the like in advance. A RAM (Random Access Memory) temporarily stores a calculation result of the CPU. The backup RAM stores information such as map data prepared in advance and specifications of the corresponding elevator 1. The operation control device 11 is electrically connected to each part of the elevator 1 such as various sensors, detectors, load detectors 2a, a car call registration device 8, a hall call registration device 9, and a power supply control device 13. The operation control device 11 comprehensively controls the operation of each part of the elevator 1. The operation control device 11 controls the driving of the hoisting machine 5 according to the operation input from the user to the car call registration device 8, the hall call registration device 9, etc., and the car 2 is moved in the hoistway 7. Move up and down. Thereby, the elevator 1 can move the car 2 to the designated destination floor according to the call registration.

  Here, as described above, the plurality of elevators 1 according to the present embodiment are supplied with electric power from the power source 50 for power, and are further provided with a battery 12. The power source 50 is a main power source that is mainly used during normal operation of the elevator 1. As the power source 50 for power, a so-called commercial power source (three-phase AC power source) or the like is typically used, but for example, a private power generation device or the like may be used.

  On the other hand, the battery 12 is an emergency auxiliary power source mainly used at the time of a power failure of the elevator 1, that is, a power failure when the power supply from the power source 50 is stopped. It can also be used for the purpose of assisting power from 50. As the battery 12, a so-called storage battery (secondary battery) or the like is typically used. The battery 12 is provided with an ammeter 12a and a voltmeter 12b, respectively. Each ammeter 12a and each voltmeter 12b can transmit a detected value to the operation control device 11 via the power supply control device 13 or the like.

  The power supply control device 13 controls charging / discharging of the battery 12. The power supply control device 13 is connected to the operation control device 11 and the battery 12 and is also connected to a power source 50 for power. For example, the power supply control device 13 rectifies the alternating current supplied from the power supply 50 for power and converts it into direct current, the smoothing capacitor that rectifies the direct current converted by the converter device, and the direct current smoothed by the smoothing capacitor. It has an electric circuit including an inverter device or the like that converts it into alternating current that can be used by the electric motor 5c of the upper machine 5 or the like.

  Further, the power supply control device 13 can appropriately switch the power for operating the elevator 1 according to the supply state of power from the power source 50 for power, and can perform charge / discharge control of the battery 12. The power control device 13 uses power supplied from at least one of the power source 50 for power and the battery 12 as power for driving the elevator 1, and the operation control device 11 operates each part using this power. And the elevator 1 is operated. For example, during normal operation in which the power supply 50 is healthy, the power supply control device 13 mainly uses the power supplied from the power supply 50 as the power used to move the car 2. At the time of a power failure, the power supplied from the battery 12 is used as the power used to move the car 2. The power supply control device 13 may use the power supplied from the battery 12 for the purpose of assisting the power from the power source 50 during normal operation. Further, the power supply control device 13 regenerates a part of the electric power supplied from the power source 50 during normal operation of the elevator 1 or regeneratively generated by the electric motor 5c during regenerative operation of the elevator 1 during normal operation or power failure. The battery 12 can be charged using electric power.

  The elevator 1 configured as described above operates as follows when a call operation of the car 2 is performed by a user via the car call registration device 8, the hall call registration device 9, or the like as a normal operation. . That is, the elevator 1 receives a car call registration signal and a hall call registration signal corresponding to the operation control apparatus 11 from the car call registration device 8, the hall call registration device 9, and the like. In the elevator 1, the operation control device 11 performs the car call registration of the car 2 or the hall call registration according to the car call registration signal and the hall call registration signal. Then, the operation control device 11 can reasonably move the car 2 based on the car call registration, the hall call registration, various sensors, outputs from the detectors, the current moving direction (lifting direction) of the car 2, and the like. However, the landing order of the basket 2 is determined so as to answer each call. Then, the operation control device 11 drives and controls the hoist 5 to move the basket 2 to the target floor. Thus, in the elevator 1, the car 2 moves up and down in the vertical direction in the hoistway 7 and moves to the landing 6 on an arbitrary destination floor. When the elevator 1 detects that the car 2 has landed on the landing 6 on the destination floor and has landed at a predetermined landing position, the operation control device 11 thereafter detects the car 2 and the door 14 of the landing 6. Is released. As a result, a user waiting at the landing 6 can get into the car 2, and a user inside the car 2 can get off at the landing 6.

  And the operation control apparatus 11 of the control apparatus 10 of this embodiment can perform the continuous operation at the time of a power failure by the battery 12 even in the power failure state of the power source 50 for power. That is, the control device 10 according to the present embodiment can be executed by switching between the normal operation described above and the continuous operation at the time of power failure described later (operation at the time of power failure).

  The normal operation is an operation when the power source 50 for power is healthy, and is an operation for moving the cage 2 up and down by the electric power from the power source 50 for power. Note that, as described above, the control device 10 may further use the power of the battery 12 as the assist power in the normal operation.

  On the other hand, the continuous operation at the time of a power failure is an operation different from the normal operation and is an operation at the time of a power failure of the power source 50 for power. The continuous operation at the time of a power failure is an operation in which the car 2 is moved up and down by the power from the battery 12 when the power source 50 is powered down. Furthermore, the continuous operation at the time of a power failure is an operation in which the car 2 is continuously moved up and down by the electric power from the battery 12 when the power source 50 is powered down. The continuous operation at the time of a power failure may be, for example, an operation in which various restrictions are provided with respect to the normal operation and the car 2 is moved up and down while suppressing the amount of power used compared to the case of the normal operation. For example, in the continuous operation during a power failure, the operation control device 11 suppresses the load on the electric motor 5c by relatively lowering the lifting speed of the cage 2 as compared with the normal operation, and the normal operation Compare power consumption. In addition, for example, in the continuous operation during a power failure, the operation control device 11 controls a cage guidance device provided in the cage 2, a landing guidance device provided in the hall 6, and the like (for example, a waiting time) Or the remaining available service time, guidance for prompting use of stairs, etc.). Thereby, the elevator 1 can make a user known that the said elevator 1 is continuing operation at the time of a power failure.

  Typically, the operation control device 11 performs normal operation when the power source 50 is healthy. And when the power supply 50 for motive power fails, the operation control apparatus 11 switches a power supply system by control of the power supply control apparatus 13, and switches from normal operation to continuous operation at the time of a power failure. Further, when the power failure of the power source 50 is restored, the operation control device 11 is switched to the normal operation from the continuous operation at the time of the power failure by switching the power system under the control of the power control device 13.

  By the way, the elevator 1 of this embodiment switches the power supply system immediately after the landing of the car 2 to the next stop floor when the power failure of the power source 50 is restored (recovered) as described above. When returning from the continuous operation to the normal operation, various problems may occur, for example, when an intermittent power failure occurs in an environment where the power situation is unstable. In this case, for example, when a power failure occurs intermittently, the elevator 1 is in a state where the normal operation and the continuous operation at the time of the power failure are alternately repeated in a short period of time. For example, there is a possibility that forced deceleration frequently occurs. Thereby, the elevator 1 may give a passenger discomfort and may affect the life of the product.

  Therefore, the elevator 1 according to the present embodiment, when the power source 50 for power failure and the continuous operation at the time of power failure are performed, when the power source 50 for power supply is recovered from the power failure, the elevator 2 is landed on a predetermined floor. Later, when returning from continuous operation during a power failure to normal operation, the normal operation during a power failure is maintained without returning to normal operation under certain conditions.

  Specifically, the operation control device 11 of the control device 10 is configured such that, for example, when the power source 50 for power is restored from the power failure while the power source 50 for power is interrupted and the operation is continued during a power failure, for example, the basket 2 After landing on a predetermined floor (for example, the nearest destination floor, the next stop floor, etc.), the presence / absence of passengers in the basket 2, the moving distance, the remaining amount of electricity stored in the battery 12, the driving direction after landing, etc. Check.

  When the call is not registered in the car 2 after the basket 2 is landed, that is, when the call to be answered after the car 2 is landed on the predetermined floor is not registered, Immediately, the power supply system is switched under the control of the power supply control device 13, the normal operation is restored from the continuous operation at the time of a power failure, and the cage 2 is put on standby. In the state where the elevator 1 is not registered in the car 2 after landing of the car 2 and it can be estimated that there are no passengers in the car 2, the forced deceleration as described above may occur or the passenger may not Since it does not give a pleasant feeling, there is no problem even if the normal operation is restored from the continuous operation at the time of power failure as soon as possible.

  On the other hand, when the call is registered in the car 2 after the car 2 has landed, that is, when the call to be answered after the car 2 has landed on the predetermined floor is registered, Based on the lifting distance expected when the car 2 responds to the registered call, it is determined whether or not it is possible to return from the continuous operation during a power failure to the normal operation. The lift distance expected when the cage 2 responds to the registered call corresponds to the lift stroke expected when the cage 2 moves to the destination floor corresponding to the registered call. Hereinafter, the expected lifting distance when the basket 2 responds to the registered call may be referred to as “expected lifting distance”.

  When the power supply 50 for power is restored from the power failure, the operation control device 11 is based on the current position of the car 2, the position of the target floor corresponding to the call registered in the car 2, the distance between the floors, and the like. After the landing of the car 2, the expected ascending / descending distance when the call currently registered in the car 2 is answered is calculated.

  And the driving | operation control apparatus 11 continues a continuous operation at the time of a power failure, when the estimated raising / lowering distance when the cage | basket | car 2 responds to the said registered call is longer than the preset normal driving | operation return determination distance. On the other hand, when the predicted ascending / descending distance is equal to or less than the normal operation return determination distance, the operation control device 11 switches the power supply system under the control of the power supply control device 13 and returns from the continuous operation at the time of power failure to the normal operation. Here, for the normal operation return determination distance, for example, a value arbitrarily set in advance according to an experiment or the like based on the power situation around the building where the elevator 1 is installed may be used.

  Next, an example of control by the control device 10 will be described with reference to the flowchart of FIG. Here, the control at the time of returning to normal operation from the state where the power source 50 for power supply has failed and the continuous operation at the time of power failure is performed will be described.

  First, the power supply control device 13 of the control device 10 determines whether or not the power failure of the power supply 50 has been restored based on the operating state of the power supply 50 (step ST1). When it is determined by the power supply control device 13 that the power failure of the power source 50 has not been restored (step ST1: No), the control device 10 ends the current control cycle and shifts to the next control cycle.

  When it is determined by the power supply control device 13 that the power supply 50 has been restored from the power failure (step ST1: Yes), the operation control device 11 of the control device 10 causes the basket 2 to land on the next stop floor (step ST2). ).

  Next, the operation control device 11 determines whether or not the car call remains in the car 2, that is, whether or not a call is registered in the car 2 (step ST3).

  When it is determined that the car call remains in the car 2, that is, the call is registered in the car 2 (step ST3: Yes), the operation control device 11 determines the expected lift distance when responding to the next car call. It is calculated and it is determined whether or not the expected ascending / descending distance is longer than the normal operation return determination distance (step ST4).

  If the operation control device 11 determines that the expected lifting distance is longer than the normal operation return determination distance (step ST4: Yes), the operation control device 11 does not return to the normal operation and maintains the continuous operation during a power failure (step ST5). End the current control cycle and move to the next control cycle.

  If the operation control device 11 determines in step ST3 that no car call remains in the car 2, that is, no call is registered in the car 2 (step ST3: No), the power control device 13 controls the power supply. The system is switched to return from the continuous operation at the time of power failure to the normal operation (step ST6), the current control cycle is terminated, and the next control cycle is started.

  If it is determined in step ST4 that the predicted lifting distance is equal to or less than the normal operation return determination distance (step ST4: No), the operation control device 11 switches the power supply system under the control of the power supply control device 13 and continues during a power failure. The operation returns to normal operation (step ST6), the current control cycle is terminated, and the next control cycle is started.

  The elevator 1 configured as described above can continue to raise and lower the car 2 by performing continuous operation during power failure using the power of the battery 12 when the power source 50 is powered down. At this time, in the continuous operation at the time of a power failure, the elevator 1 can raise and lower the car 2 while suppressing the amount of power used, compared to the case of the normal operation, and thus continues the continuous operation at the time of a power failure for a longer time. be able to. As a result, since the elevator 1 can raise and lower the car 2 by a continuous operation during a power failure for a longer time, for example, even when the power source 50 is out of power, more people in the building can take up the elevator 1. Can be used.

  And when the power supply 50 recovers from a power failure in the state of continuous operation at the time of a power failure, the elevator 1 continues the continuous operation at the time of a power failure until the next stop floor. Then, when the car 1 is registered in the car 2 after the car 2 has landed on the next stop floor, the expected lifting distance when the car 2 responds to the registered call is normal operation. If it is longer than the return judgment distance, continue operation at power failure. Thereby, since the elevator 1 has a relatively long ascent distance, it can be estimated that the possibility of a power failure again during traveling to the destination floor corresponding to the call registered in the car 2 is relatively high. In this case, continuous operation during a power failure can be maintained. As a result, the elevator 1 is in a state where the normal operation and the continuous operation during a power failure are alternately repeated in a short period of time, for example, when a power failure occurs intermittently in an environment where the power situation is unstable. Can be suppressed. Therefore, since the elevator 1 can suppress frequent switching between normal operation and continuous operation during a power failure due to an intermittent power failure, it can suppress frequent occurrence of forced deceleration. For example, it is possible to suppress discomfort to the passengers and to suppress a decrease in the service life of the product.

  On the other hand, when the power source 50 for power is restored from the power failure in the state of continuous operation at the time of power failure, the elevator 1 has a car registered when a call is registered in the car 2 after the car 2 has landed on the next stop floor. When the expected lifting distance when 2 responds to the registered call is equal to or less than the normal operation return determination distance, the normal operation is resumed from the continuous operation at the time of power failure. As a result, the elevator 1 returns to the normal operation from the continuous operation at the time of power failure when it can be estimated that the possibility of a power failure again is relatively low during traveling to the destination floor corresponding to the call registered in the car 2. can do.

  In addition, when the power source 50 for power is restored from the power failure in the state of continuous operation at the time of power failure, the elevator 1 immediately after the car 2 has landed on the next stop floor and the call is not registered in the car 2 Then, the normal operation is restored from the continuous operation at the time of power failure, and the basket 2 is put on standby. In this case, if possible, the elevator 1 can switch the power system from the battery 12 to the power source 50 immediately after the power source 50 is restored, so that the power consumption of the battery 12 can be suppressed. it can.

  The elevator 1 described above includes a basket 2 that can move up and down the hoistway 7 and a control device 10. The control device 10 can switch between a normal operation in which the car 2 is moved up and down by the power from the power source 50 and a continuous operation at the time of a power failure in which the car 2 is moved up and down by the power from the battery 12 when the power source 50 is powered down. It is. When a call is registered in the car 2 when the power source 50 is restored from the power failure while the power supply 50 is restored from the power outage in a state where the control device 10 is continuously operated during a power failure, the car 2 is changed to the registered call. When the expected lifting distance when responding is longer than the preset normal operation return determination distance, the continuous operation at the time of power failure is continued. The control device 10 returns to the normal operation from the continuous operation at the time of a power failure when the predicted ascending / descending distance is not more than the normal operation return determination distance. Therefore, the elevator 1 can continue the operation by the continuous operation at the time of power failure using the power from the battery 12 even when the power source 50 for power failure, and for example, the power source 50 for intermittent power Since it is possible to suppress frequent switching between normal operation and continuous operation during a power failure due to a power failure, it is possible to appropriately perform the operation during a power failure.

  In addition, the elevator which concerns on embodiment mentioned above is not limited to embodiment mentioned above, A various change is possible in the range described in the claim.

  The operation control device 11 described above may change the normal operation return determination distance in accordance with, for example, the state of the elevator 1 or the state of the power source 50 for power. In this case, for example, as illustrated in the modified example of FIG. 3, the operation control device 11 determines that the car call remains in the car 2 in step ST3 (step ST3: Yes), and then performs the process of step ST4. Before the operation, a process for setting the normal operation return determination distance may be performed in accordance with the state of the elevator 1, the state of the power supply 50, and the like (step ST4a).

  For example, the operation control device 11 makes the normal operation return determination distance variable according to the stability of the power source 50 for power, in other words, according to the difficulty of occurrence of an intermittent power failure. In this case, for example, the operation control device 11 is a period from the end of the continuous operation at the time of a power failure to the resumption of the continuous operation at the time of the power failure, or from the recovery from the power failure of the power source 50 to the power failure of the power source 50 again. This period may be stored and learned, and the stability of the power source 50 may be estimated based on the period. In this case, for example, when the operation control device 11 has a relatively short period from the end of the continuous operation at the time of a power failure to the resumption of the continuous operation at the time of the power failure, the period from the recovery from the power failure of the power source 50 to the re-power failure. It is estimated that the stability of the power source 50 is relatively low and the power supply state by the power source 50 is not stable. On the other hand, for example, when the operation control device 11 has a relatively long period from the end of the continuous operation at the time of a power failure to the resumption of the continuous operation at the time of the power failure, the period from the recovery from the power failure of the power supply 50 to the re-power failure. It is estimated that the stability of the power source 50 is relatively high and the power supply state by the power source 50 is stable.

  Then, the operation control device 11 reflects the estimated stability of the power supply 50 for power in the setting of the normal operation return determination distance. Here, when the stability of the power supply 50 is relatively high, the operation control device 11 increases the normal operation return determination distance relatively long and the stability of the power supply 50 is relatively low. The normal operation return determination distance is made relatively short.

  Thereby, when the stability of the power supply 50 is relatively high and the power supply state by the power supply 50 can be estimated to be relatively stable, the elevator 1 increases the normal operation return determination distance. In addition, it is possible to easily return from the continuous operation during a power failure to the normal operation. On the other hand, when the stability of the power source 50 is relatively low and it can be estimated that the power supply state by the power source 50 is not relatively stable, the elevator 1 shortens the normal operation return determination distance. This makes it difficult to return to normal operation from continuous operation during a power failure. Therefore, the elevator 1 can shorten the time when the serviceability is reduced as much as possible.

  Further, the operation control device 11 may change the normal operation return determination distance according to, for example, the remaining power storage amount of the battery 12. In this case, for example, the operation control device 11 periodically receives the detection result from the ammeter 12a and the voltmeter 12b of the battery 12 via the power supply control device 13 and the like, and based on the detection result, the current of the battery 12 Value and voltage value are monitored, and the remaining charge amount of the battery 12 is monitored.

  Then, the operation control device 11 reflects the remaining power storage amount of the battery 12 in the setting of the normal operation return determination distance. Here, the operation control device 11 makes the normal operation return determination distance relatively long when the remaining charge amount of the battery 12 is relatively small, and is normal when the remaining charge amount of the battery 12 is relatively large. Reducing the driving return judgment distance relatively.

  As a result, when the remaining charge amount of the battery 12 is small and the time during which the continuous operation during power failure can be continued with the power of the battery 12 is relatively short, the elevator 1 increases the normal operation return determination distance, It can be made easy to return from the continuous operation to the normal operation. On the other hand, when the remaining charge amount of the battery 12 is large and the time during which the continuous operation during power failure can be continued with the power of the battery 12 is relatively long, the elevator 1 shortens the normal operation return determination distance and continues during the power failure. It can be made difficult to return to normal operation from operation. Therefore, since the elevator 1 can return to normal operation relatively early when the remaining amount of electricity stored in the battery 12 is small, the power of the battery 12 can be reduced under a situation where the remaining amount of electricity stored in the battery 12 is small. Consumption can be suppressed, and normal operation can be restored from continuous operation during a power failure.

  The operation control device 11 is not limited to the above, and the normal operation return determination distance may be variable according to both the stability of the power source 50 for power and the remaining power storage amount of the battery 12, and other parameters, For example, the presence / absence of passengers in the car 2 and the driving direction after landing may be reflected in the setting of the normal driving return determination distance.

  According to the elevator which concerns on embodiment described above and the modification, the driving | operation at the time of a power failure can be performed appropriately.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These 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 their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Elevator 2 Basket 3 Counterweight 4 Main rope 5 Hoisting machine 6 Platform 7 Hoistway 8 Basket call registration device 9 Platform call registration device 10 Control device 11 Operation control device 12 Battery (power storage device)
13 Power Control Device 14 Door 50 Power Supply for Power

Claims (4)

A basket capable of moving up and down the hoistway;
A control device capable of switching between a normal operation for raising and lowering the car with electric power from a power source for power supply and a power failure operation for raising and lowering the car with electric power from a power storage device when the power source for power supply is interrupted ,
The controller responds to the registered call when a call is registered in the car when the power supply for power is restored from the power failure while the operation is performed at the time of the power failure. When the expected lifting distance is longer than the preset normal operation return determination distance, the operation at the time of power failure is continued, and when the predicted lifting distance is equal to or less than the normal operation return determination distance, the operation at the time of power failure is performed. To return to the normal operation from
elevator. The control device makes the normal operation return determination distance variable according to the stability of the power source for power,
When the stability of the power source for power is relatively high, the normal operation return determination distance is relatively long,
When the stability of the power supply for power is relatively low, the normal operation return determination distance is relatively shortened,
The elevator according to claim 1. The control device is for the power based on a period from the end of the operation at the time of a power failure to the restart of the operation at the time of the power failure, or a period from a recovery from a power failure of the power source for power to a re-power failure of the power source for the power. Estimating the stability of the power supply,
The elevator according to claim 2. The control device is configured to change the normal operation return determination distance according to the remaining power storage amount of the power storage device,
When the remaining power storage amount of the power storage device is relatively small, the normal operation return determination distance is relatively long,
When the remaining power storage amount of the power storage device is relatively large, the normal operation return determination distance is relatively short,
The elevator according to any one of claims 1 to 3.

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