JP2012175857A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator capable of continuously operating adaptively to a state of insufficient power supply from a non-contact power supply device.SOLUTION: The elevator includes a power reception device 24 which is provided to a counterweight, and faces a non-contact power supply device 23 when an elevator cage stops on each floor to receive electric power supplied from the non-contact power supply device 23; an electric power monitoring part 32 which monitors the electric power being supplied through the power reception device 24; and an operation control part 35 which switches the mode to an energy-saving operation mode when the electric power monitoring part 32 detects a state in which the electric power decreases to a certain value or smaller.

Description

  Embodiments of the present invention relate to an elevator that includes a power receiving device in a counterweight and receives electric power in a non-contact manner from a non-contact power feeding device installed in a hoistway.

  In recent years, elevators using a non-contact power feeding method have become widespread. In particular, there is an elevator that includes a power receiving device in a counterweight and operates by receiving electric power in a non-contact manner from a non-contact power feeding device installed in a hoistway.

  In this type of elevator, the counterweight is provided with a battery and a motor, and normally operates by driving the motor with electric power stored in the battery. And at the time of electric power feeding, the electric power feeder installed in the hoistway and the electric power receiving apparatus installed in the counterweight are made to oppose, it receives electric power from a non-contact electric power feeder non-contactedly, and this is stored in a battery.

JP 2001-163533 A JP 2002-249285 A

  In the elevator of the non-contact power feeding method as described above, there is a problem that if any abnormality occurs in the non-contact power feeding device or the power receiving device, the remaining battery capacity becomes insufficient and the operation cannot be continued.

  Further, the non-contact power feeding device cannot feed power unless it faces the power receiving device on the counterweight side with high accuracy. However, the alignment of the non-contact power feeding device and the power receiving device may be shifted due to the elongation of the rope accompanying the secular change and the wear of the sheave, and the power feeding efficiency may be significantly reduced, resulting in a shortage of the battery.

  The problem to be solved by the present invention is to provide an elevator capable of coping with a state where power supply from a non-contact power supply device is insufficient and continuing operation.

  An elevator according to an embodiment is provided in the counterweight in an elevator including a non-contact power feeding device that supplies power in a non-contact manner to a counterweight that moves up and down with a car in a hoistway, and the car is provided on each floor. A power receiving device that receives power supplied from the non-contact power supply device facing the non-contact power supply device when landing, a power monitoring unit that monitors power at the time of power supply obtained through the power receiving device, and the power And an operation control means for switching to the energy saving operation mode when the monitoring means detects a state where the electric power is reduced below a certain value.

FIG. 1 is a diagram illustrating a configuration of an elevator according to the first embodiment. FIG. 2 is a block diagram showing a functional configuration of the elevator control device according to the embodiment. FIG. 3 is a flowchart showing the operation of the elevator according to the embodiment. FIG. 4 is a flowchart showing the operation operation of the elevator in the energy saving operation mode in the same embodiment. FIG. 5 is a block diagram illustrating a functional configuration of an elevator control device according to the second embodiment. FIG. 6 is a flowchart showing the operation of the elevator according to the embodiment. FIG. 7 is a diagram showing a state of the elevator car when landing in the third embodiment. FIG. 8 is a block diagram illustrating a functional configuration of the elevator control device according to the embodiment. FIG. 9 is a flowchart showing the operation of the elevator according to the embodiment.

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

(First embodiment)
FIG. 1 is a diagram showing the configuration of the elevator according to the first embodiment, and shows the configuration of a 2: 1 low pink type elevator.

  A car 11 and a counterweight (suspending weight) 12 are provided in the hoistway 10 and are supported by guide rails (not shown) so as to be able to move up and down. The car 11 has a sheave 14 under the car, and a rope 13 having one end fixed to the top of the hoistway is installed below the sheave 14.

  The rope 13 is wound around a traction sheave 16 provided in the counterweight 12 via a sheave 15 provided at the top of the hoistway, and the other end is fixed to the top of the hoistway. As a result, the car 11 and the counterweight 12 are supported in a 2: 1 low pink format.

  Further, the counterweight 12 is equipped with a motor 17, a control device 18, and a battery 19. The motor 17 is a driving device for moving the car 11 and the counterweight 12 up and down. When the traction sheave 16 attached to the rotating shaft of the motor 17 rotates, the car 11 and the counterweight 12 are lifted and lowered in a slipping manner via the rope 13 wound around the traction sheave 16.

  The control device 18 controls the entire elevator including drive control of the motor 17. The functional configuration of the control device 18 will be described later with reference to FIG. The battery 19 stores electric power necessary for driving the elevator.

  In the present embodiment, the hoistway 10 is provided with a power feeding system 20 for supplying required power to the counterweight 12 without contact.

  This power supply system 20 includes a plurality of power supply devices 22-1, 22-2,... 22-n connected to a three-phase AC power supply 21, and these power supply devices 22-1, 22-2,. It consists of the non-contact electric power feeders 23-1, 23-2, ... 23-n connected.

  The power supply devices 22-1 2-2,... 22-n are provided corresponding to the respective floors of the building, and each converts power supplied from the three-phase AC power supply 21 into power required for driving the elevator. To do.

  The contactless power feeding devices 23-1, 23-2, ... 23-n are arranged in the hoistway 10 in accordance with the position of the counterweight 12 when the car 11 is stopped on each floor. These non-contact power feeding devices 23-1, 23-2,... 23-n perform power feeding in a non-contact manner when facing the power receiving device 24 provided in the counterweight 12.

  For example, an electromagnetic induction method is used as a non-contact power supply method. The “electromagnetic induction method” is a method of transmitting power to the other coil (power receiving side coil) through the magnetic flux generated when a current is passed through one of the two adjacent coils (power feeding side coil). In addition to this, there are a "radio wave system" that converts current into electromagnetic waves and transmits power through an antenna, and an "electromagnetic field resonance system" that uses the resonance phenomenon of electromagnetic fields. It is not limited.

  In addition, in the example of FIG. 1, the non-contact power feeding devices 23-1, 23-2, ... 23-n are installed on each floor, but the number is arbitrary, for example, installed only on the top floor and the bottom floor. It is also possible to keep it.

  A pulse generator 25 is provided on the rotating shaft of the motor 17. The pulse generator 25 detects the rotation of the motor 17 and outputs a pulse signal several hundred times per rotation. The controller 18 grasps the current position of the car 11 by counting the pulse signals.

  On the other hand, a load sensor 26 for detecting a loaded load is provided at the bottom of the car 11. A signal indicating the loaded load detected by the load sensor 26 is given to the control device 18 via a transmission cable (not shown).

  In such a configuration, by obtaining power from the battery 19 mounted on the counterweight 12, the motor 17 is driven to drive the car 11 and the counterweight 12. When the car 11 stops on each floor, the contactless power feeding devices 23-1, 23-2, ... 23-n pass through the contactless power feeding device facing the power receiving device 24 provided on the counterweight 12. The electric power is received and the electric power is stored in the battery 19.

  Here, the non-contact power feeding devices 23-1, 23-2,... 23-n cannot feed power unless they face the power receiving device 24 on the counterweight 12 side with high accuracy. Further, if any abnormality occurs in the non-contact power feeding devices 23-1, 23-2,... 23-n and the power receiving device 24, the power feeding efficiency is remarkably lowered, the battery becomes insufficient, and the elevator cannot be operated normally.

  FIG. 2 is a block diagram showing a functional configuration of the elevator control device 18 in the first embodiment. In FIG. 2, reference numeral 23 is attached to the non-contact power feeding device installed on an arbitrary floor on behalf of the non-contact power feeding devices 23-1, 23-2,. I will explain.

  As shown in FIG. 1, a power receiving device 24 is installed in the counterweight 12. The power receiving device 24 receives required power from the non-contact power feeding device 23 in a non-contact manner when facing the non-contact power feeding device 23 with the landing of the car 11.

  Here, in the first embodiment, a current sensor 31 for detecting a current value (amount of power received) obtained from the non-contact power feeding device 23 is provided in the power receiving device 24, and a detection signal of the current sensor 31 is provided. Is input to the control device 18.

  The control device 18 includes a power monitoring unit 32, an external notification unit 33, a control parameter switching unit 34, and an operation control unit 35.

  The power monitoring unit 32 monitors the amount of power during power feeding based on the current value detected by the current sensor 31, and outputs an abnormal signal to the outside when a state in which the power drops below a certain value is detected. The information is output to the reporting unit 33 and the control parameter switching unit 34.

  When receiving the power drop abnormality signal from the power monitoring unit 32, the external reporting unit 33 reports that fact to the outside. The term “external” as used herein refers to an elevator monitoring room (not shown) in a building or a monitoring center (not shown) that remotely monitors the state of the elevator via a communication network in a remote place.

  When the control parameter switching unit 34 receives an abnormal signal indicating a power decrease from the power monitoring unit 32, the control parameter switching unit 34 switches the operation parameter of the elevator for energy saving operation. The operation parameters are parameters related to the operation of the elevator. For example, rated speed, acceleration / deceleration, jerk (time change rate of acceleration / deceleration), door opening / closing speed and illuminance of car lighting, announcement device in the car, Includes operating conditions for air conditioners.

  The operation control unit 35 controls the driving of the motor 17 to move the car 11 and the counterweight 12 up and down. At this time, when an operation parameter for energy-saving operation is given from the control parameter switching unit 34, the operation control unit 35 operates by switching the operation mode of the elevator to the energy-saving operation mode using the operation parameter.

  Reference numeral 36 denotes an inverter device used as a driving device for the motor 17. Although not shown in FIG. 1, the inverter device 36 is actually provided in the counterweight 12 together with the motor 17.

Next, the operation of the first embodiment will be described.
FIG. 3 is a flowchart showing the operation of the elevator according to the first embodiment.

  When the car 11 is traveling, electric power is obtained from the battery 19 mounted on the counterweight 12, and the motor 17 is driven to rotate.

  When the car 11 reaches any floor (Yes in Step A11), the power receiving device 24 installed on the counterweight 12 and the non-contact power feeding device 23 are opposed to each other, and power is supplied from the non-contact power feeding device 23 in a non-contact manner. The power is received and stored in the battery 19 (step A12).

  Here, a current value during power feeding is detected by a current sensor 31 provided in the power receiving device 24. The control device 18 monitors the current value detected by the current sensor 31 (step A13). When the current value is equal to or less than a certain value (for example, less than half of that when power supply is normal) (Yes in step A14), the control device 18 determines that the power during power supply has been reduced for some reason. This is reported to the outside (elevator management room or monitoring center) (step A15).

  Further, the control device 18 switches the operation parameter of the elevator for energy saving, and operates the elevator in the energy saving operation mode (step A16). Specifically, for example, by reducing the rated speed, acceleration / deceleration, and jerk of the elevator (riding car) to 20% of the normal time, or reducing the door opening / closing speed of the car door to 20% of the normal time. Operate while minimizing the power consumed inside. During the energy saving operation, the luminance of the lighting device in the car 11 and the air conditioning operation frequency may be lowered than usual.

  On the other hand, when the current value detected by the current sensor 31 is greater than a certain value and it is determined that there is no problem with power feeding (No in step A14), the control device 18 continues the normal operation mode (step A17). ).

  In this way, when it is detected that the power supply during power supply has been reduced for some reason, it is reported to the outside, and during that time, switching to the energy-saving operation mode allows consumption until maintenance personnel arrive at the site. Operation can be continued while suppressing power.

  In addition, when switching to the energy saving operation mode due to power reduction during power feeding, the energy saving operation may be performed only during the power running operation instead of always performing the energy saving operation.

  That is, for example, when the car 11 moves downward in the hoistway 10, if the load of the car 11 at that time is heavier than the counterweight 12, the motor 17 functions as a generator because it moves in the balance direction. Power is generated. Similarly, when the car 11 moves upward, if the load on the car 11 at that time is lighter than the counterweight 12, it moves in the balance direction, so that the motor 17 functions as a generator to generate electric power.

  Thus, operating the car 11 without requiring power by moving in the balance direction is called “regenerative operation”, and the electric power generated at that time is called “regenerative power”. Conversely, an operation that requires the power of the motor 17 is referred to as a “power running operation”. Whether the current operation state is regenerative operation or power running operation can be determined from the operation direction of the car 11 and the loaded load.

  FIG. 4 is a flowchart showing the operation operation of the elevator in the energy saving operation mode in the first embodiment.

  The control device 18 acquires the driving direction and the loaded load of the car 11 as elevator driving information (step B11). The driving direction can be determined from the current position and the direction called, and the loaded load is detected by a load sensor 26 installed at the bottom of the car 11.

  The control device 18 determines whether the operation corresponding to the call is a power running operation or a regenerative operation based on the operation direction and the loaded load of the car 11 (step B12). As a result, when it is a power running operation (Yes in Step B12), the control device 18 executes the energy saving operation, and causes the car 11 to respond to the called floor by reducing the rated speed (Step B13). .

  On the other hand, if the operation is a regenerative operation (No in Step B12), the control device 18 does not perform the energy saving operation, but causes the car 11 to respond to the called floor as it is by the normal operation (Step B14).

  As described above, by performing the energy saving operation only during the power running operation that requires electric power, it is possible to continue the operation without reducing the operation efficiency as much as possible.

(Second Embodiment)
Next, a second embodiment will be described.

  In the second embodiment, in addition to the configuration of the first embodiment, when the remaining battery level falls below a certain value, the mode is switched to the energy saving operation mode.

  FIG. 5 is a block diagram showing a functional configuration of the elevator control device 18 according to the second embodiment. In addition, the same code | symbol is attached | subjected to the same part as the structure of FIG. 2 in the said 1st Embodiment, and the description shall be abbreviate | omitted.

  The difference from FIG. 2 is that a remaining battery level detection unit 37 is added to the control device 18. The battery remaining amount detection unit 37 has a function of detecting the current remaining amount (electric energy) from the voltage of the battery 19, and when the remaining amount of the battery 19 is reduced below a certain level, an abnormal signal is transmitted to the external notification unit 33. Output to the control parameter switching unit 34.

  FIG. 6 is a flowchart showing the operation of the elevator in the second embodiment.

  When the car 11 is traveling, electric power is obtained from the battery 19 mounted on the counterweight 12, and the motor 17 is driven to rotate.

  When the car 11 reaches any floor (Yes in step C11), the power receiving device 24 and the non-contact power feeding device 23 installed on the counterweight 12 are opposed to each other, and power is supplied from the non-contact power feeding device 23 in a non-contact manner. The power is received and stored in the battery 19 (step C12).

  Here, a current value during power feeding is detected by a current sensor 31 provided in the power receiving device 24. The control device 18 monitors the current value detected by the current sensor 31 (step C13). When the current value is equal to or less than a certain value (for example, less than half of that when power supply is normal) (Yes in step C14), the control device 18 determines that the power during power supply has been reduced for some reason. This is reported to the outside (elevator management room or monitoring center) (step C15).

  Further, the control device 18 switches the operation parameter of the elevator for energy saving, and operates the elevator in the energy saving operation mode (step C16). Specifically, for example, by reducing the rated speed, acceleration / deceleration, and jerk of the elevator (riding car) to 20% of the normal time, or reducing the door opening / closing speed of the car door to 20% of the normal time. Operate while minimizing the power consumed inside. During the energy saving operation, the luminance of the lighting device in the car 11 and the air conditioning operation frequency may be lowered than usual.

  On the other hand, when it is determined that the current value detected by the current sensor 31 is greater than a certain value (No in Step C14), the control device 18 detects the current remaining amount from the voltage of the battery 19 (Step C17). . As a result, when the remaining amount of the battery 19 is equal to or less than a certain value (for example, less than half of the battery capacity) (Yes in Step C18), the control device 18 determines that the operation is hindered due to power shortage. Then, the fact is notified to the outside (step C15), the operation parameter of the elevator is switched to energy saving, and the elevator is operated in the energy saving operation mode (step C16).

  In this way, by monitoring the remaining battery level in addition to the power being fed, the current power state of the elevator can be grasped more reliably, and it is possible to respond appropriately when troubles occur due to power shortage. .

  In addition, although it was set as the structure which monitors both the electric power and the battery remaining charge during feeding here, when only the battery remaining amount is monitored, when it falls below a fixed value, it will switch to energy saving operation mode with an external alarm. Also good.

  Further, in the energy saving operation mode, as described with reference to FIG. 4, the energy saving operation may be executed only during the power running operation.

(Third embodiment)
Next, a third embodiment will be described.

  FIG. 7 is a diagram showing a state of the elevator car when landing in the third embodiment. A landing detection sensor 41 for detecting the landing level of the car 11 is provided at the bottom of the car 11. The landing detection sensor 41 approaches the car 11 by approaching one of landing plates 42-1, 42-2... 42-n provided on the lower side of the landing entrance on each floor in the hoistway 12. Detects that has landed at the landing.

  At this time, normally, the power receiving device 24 provided in the counterweight 12 is in a state in which power can be supplied facing any of the non-contact power feeding devices 23-1, 23-2, ... 23-n. However, there may be a positional shift between the non-contact power feeding devices 23-1, 23-2,... 23-n and the power receiving device 24 due to the stretch of the rope 13 or the wear of the traction sheave 16. If such a position shift occurs, the power supply efficiency is lowered, and therefore, the elevator side has insufficient power (battery shortage), which hinders operation.

  In the third embodiment, the power reduction due to the positional deviation between the non-contact power feeding devices 23-1, 23-2,... 23-n and the power receiving device 24 is prevented.

  FIG. 8 is a block diagram illustrating a functional configuration of the elevator control device 18 according to the third embodiment. In addition, the same code | symbol is attached | subjected to the same part as the structure of FIG. 2 in the said 1st Embodiment, and the description shall be abbreviate | omitted.

  The difference from FIG. 2 is that a position adjusting unit 38 is added to the control device 18. The position adjusting unit 38 finely adjusts the landing position when a power drop is detected by the power monitoring unit 32 when the car 11 is landing. When power is increased by this adjustment operation, the operation control unit 35 stores the adjusted position and performs position control so that the car 11 is landed at the position after the fine adjustment from the next operation. Do.

  FIG. 9 is a flowchart showing the operation of the elevator according to the third embodiment.

  When the car 11 is traveling, electric power is obtained from the battery 19 mounted on the counterweight 12, and the motor 17 is driven to rotate.

  When the car 11 reaches any floor (Yes in Step D11), the power receiving device 24 installed on the counterweight 12 and the non-contact power feeding device 23 are opposed to each other, and electric power is supplied from the non-contact power feeding device 23 in a non-contact manner. The power is received and stored in the battery 19 (step D12).

  Here, a current value during power feeding is detected by a current sensor 31 provided in the power receiving device 24. The control device 18 monitors the current value detected by the current sensor 31 (step D13). When the current value is equal to or less than a certain value (for example, less than half of the normal power supply) (Yes in Step D14), the control device 18 determines the possibility of misalignment between the non-contact power supply device 23 and the power receiving device 24. Considering, fine adjustment of the landing position is performed (step D15).

  Specifically, the motor 17 is driven and the car 11 is moved slightly upward or downward to the extent that it does not affect the landing level. This fine adjustment operation is preferably performed in a state where there is no call for a certain period of time.

  When the power is increased by this fine adjustment, that is, when the current value detected by the current sensor 31 is higher than a certain value (Yes in step D16), the control device 18 includes the non-contact power feeding device 23 and the power receiving device. 24, the position after the adjustment (number of pulses of the pulse generator 25) is stored, and the car 11 is landed at the position after the fine adjustment from the next operation. Position control is performed as described above (step D17).

  Further, when the amount of adjustment of the landing position becomes equal to or greater than a certain level (Step D20 Yes), an external notification is given that the size of the step generated at the landing and the platform is outside the allowable range, and the non-contact power feeding device 23 Alternatively, the fact that adjustment is necessary is notified to the mounting position of the power receiving device 24 (step D21).

  On the other hand, if the power does not increase due to the fine adjustment, that is, if the current value detected by the current sensor 31 is equal to or less than a certain value (No in step D16), the control device 18 causes trouble in operation due to power shortage. This is notified to the outside (step D18), the operation parameter of the elevator is switched to energy saving, and the elevator is operated in the energy saving operation mode (step D19).

  As described above, by providing the function of finely adjusting the landing position, it is possible to prevent power reduction due to the positional deviation between the non-contact power feeding device 23 and the power receiving device 24.

  In addition, although it was set as the structure which monitors the electric power in electric power feeding here, it is good also as a structure which monitors both the electric power in electric power feeding and a battery remaining charge like the said 2nd Embodiment.

  Further, in the energy saving operation mode, as described with reference to FIG. 4, the energy saving operation may be executed only during the power running operation.

  According to at least one embodiment described above, it is possible to provide an elevator capable of coping with a state where power supply from the non-contact power supply device is insufficient and continuing operation.

  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 ... Hoistway, 11 ... Ride car, 12 ... Counterweight, 13 ... Rope, 14 ... Sheave, 15 ... Sheave, 16 ... Traction sheave, 17 ... Motor, 18 ... Control device, 19 ... Battery, 20 ... Power feeding system, DESCRIPTION OF SYMBOLS 21 ... Three-phase alternating current power supply, 22-1, 222-2-22-n ... Power supply device, 23-1, 23-2-23-n ... Non-contact electric power supply device, 24 ... Power receiving device, 25 ... Pulse generator, 26 DESCRIPTION OF SYMBOLS ... Load sensor, 31 ... Current sensor, 32 ... Electric power monitoring part, 33 ... External notification part, 34 ... Control parameter switching part, 35 ... Operation control part, 36 ... Inverter device, 37 ... Battery remaining amount detection part, 38 ... Position adjustment unit.

Claims (6)

In an elevator equipped with a non-contact power feeding device that supplies power in a non-contact manner to a counterweight that moves up and down with a car in a hoistway,
A power receiving device that is provided in the counterweight and receives power supplied from the non-contact power feeding device opposite the non-contact power feeding device when the car is landed on each floor;
Power monitoring means for monitoring the power at the time of power supply obtained through the power receiving device;
An elevator comprising: an operation control unit that switches to an energy-saving operation mode when a state in which the power is reduced to a predetermined value or less is detected by the power monitoring unit. A battery for storing electric power supplied from the contactless power supply device;
Battery remaining amount detecting means for detecting the remaining amount of the battery,
The operation control means includes
When the power monitoring means detects that the power is decreasing below a certain value, or when the battery remaining capacity detecting means detects that the remaining battery power is below a certain value The elevator according to claim 1, wherein the elevator is operated by switching to an energy saving operation mode. The operation control means includes
2. The elevator according to claim 1, wherein it is determined whether or not a power running operation is performed based on a driving direction of the car and a loaded load, and the power saving operation mode is switched to the energy saving operation mode in the case of the power running operation. A current sensor provided in the power receiving device for detecting a current value obtained from the non-contact power feeding device;
The power monitoring means includes
The elevator according to claim 1, wherein the electric power during power feeding is monitored based on a current value detected by the current sensor.   2. The apparatus according to claim 1, further comprising external reporting means for reporting the fact to the outside when the power monitoring means detects that the power is decreasing below a certain value. The elevator described. A position adjusting means for finely adjusting the landing position of the car when the power monitoring means detects a state in which the power is reduced below a certain value;
The operation control means includes
2. The elevator according to claim 1, wherein position control is performed so that, when power is increased by the adjustment operation by the position adjustment means, the car is landed at the adjusted position from the next operation.

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