JPH08319072A - Operation device for elevator if power should fail - Google Patents

Abstract

PURPOSE: To reduce the consumption of electric power of a battery by means of a rescue operation device at all times when switch-over is made to the rescue operation device if power should fail. CONSTITUTION: It is normally detected by a load detector 14 whether or not there exist any passenger in an elevator cage 8, and if there exist some passengers in the cage, the existence of the passengers is stored in a passenger detection memory circuit 23. When the existence of the passengers in the cage is stored in the passenger detection memory circuit 23 if power should fail, service interruption passenger detection relay contacts 21a and 21b are closed in circuit, and a battery 20 is connected to a first and a second inverter 5 and 15, so that rescue operation is thereby started. Therefore, if there exists no passenger in the cage 8, the contacts 21a and 21b will never be closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for operating an elevator during a power failure.

[0002]

2. Description of the Related Art When a power failure occurs during operation of an elevator, a car may stop between floors, trapping passengers in the car. In order to prevent this, an operation device at the time of a power failure has been installed to rescue passengers by operating an elevator by using a battery as a power source during a power failure. In recent years, in order to reduce power consumption, an elevator driving electric motor is connected to an inverter, and this inverter is controlled by a microcomputer (hereinafter referred to as a microcomputer). A battery is connected to the DC side to operate during a power failure.

FIG. 6 is an overall configuration diagram showing a conventional elevator power failure operation device disclosed in, for example, Japanese Patent Laid-Open No. 64-75382. In the figure, an operation control device 81 is connected to the three-phase AC power supply 1, and a three-phase induction motor 6 is connected via a main circuit contact 82. The electric sheave 6 drives the drive sheave 7, and the car 8 and the counterweight 9 are moved up and down. A load detector 14 for detecting the presence or absence of passengers in the car is installed in the car 8.

On the other hand, a rescue operation device 83 is connected to the battery 20 for operation during a power failure, and is connected to the electric motor 6 via a rescue operation relay contact 84a. In addition, the rescue operation condition relay contact 3 that closes when the battery 20 detects a power failure
5, the load detection relay contact 14a that closes when the load detector 14 operates, and the series circuit of the rescue operation relay 84 are connected, and the door open detection relay contact 26 is connected in parallel to the load detection relay contact 14a. .

The conventional elevator power failure operation device is constructed as described above. During normal operation, the main circuit contact 82 is closed, and power is supplied from the three-phase AC power supply 1 to the electric motor by the operation control device 81. 6 is driven, the drive sheave 7 rotates, and the raising and lowering of the car 8 is controlled. When the three-phase AC power supply 1 has a power failure (hereinafter simply referred to as a power failure) and a rescue operation is required, the rescue operation condition relay contact 35 is closed. In this state, if a passenger is in the car 8, the load detector 14 operates and the load detection relay contact 14a is closed.

As a result, the rescue operation relay 84 is energized, the contact 84a is closed, power is supplied from the battery 20, and the rescue operation device 83 drives the electric motor 6 to start the rescue operation. Then, the car 8 is driven to the nearest floor. When the car 8 stops at the nearest floor and the door is opened, the door open detection relay contact 26 is closed, the passenger in the car 8 is rescued, and the door open state is maintained even if the load detector 14 no longer detects the load. The rescue operation relay 84 continues to be energized as long as it continues.

Thereafter, when the passenger is rescued from the car 8 and the door is closed, the door open detection relay contact 26 is opened, the load detection relay contact 14a is also opened, the rescue operation relay 84 is deenergized, and the contact 84a. Is opened, and the rescue operation of the elevator ends. Even when the rescue operation condition relay contact 35 is closed due to a power failure from the normal operation, the load detection relay contact 14a remains open and the rescue operation relay 84 is attached when the passenger is not in the car 8. Not energized.
Therefore, rescue operation is not started.

[0008]

In the conventional elevator power failure operation device as described above, the rescue operation device 83 is connected to the battery 20 regardless of the presence or absence of passengers in the car 8. If no passengers are on the vehicle and the rescue operation is not actually needed, the battery 20 is unnecessarily used, and if the power outage is intermittent within a short time, the rescue operation is repeated. However, there is a problem in that the electric power consumption of the battery 20 increases and the rescue operation becomes impossible when the rescue operation is actually required.

Particularly, in recent elevators, an inverter controlled by a microcomputer is used to control the electric motor 6. The clock frequency has also become considerably higher due to higher functionality and higher performance. For this reason, the power consumption of the control device tends to increase, and the above problems cannot be ignored.

The present invention has been made to solve the above problems, and when there is no passenger in the car during a power failure,
It is an object of the present invention to provide an elevator power failure operation device capable of eliminating the power supply from the battery to the rescue operation device.

[0011]

According to a first aspect of the present invention, there is provided an elevator power failure operation device, which detects passengers in a car during normal operation and stores them, and a power failure detection means. When the rescue operation condition circuit that operates upon detection, and the rescue operation condition circuit and passenger detection storage means operate, a battery is supplied to the first inverter connected to the car driving motor and the second inverter connected to the control circuit. It is provided with a power failure passenger detection contact point to be connected.

Further, the elevator power failure operating device according to the second aspect of the present invention is, in the first aspect of the invention, provided with a passenger presence detection holding circuit for holding the operation of the power failure passenger detection contact during the rescue operation.

Further, the elevator power failure operating device according to a third aspect of the present invention is, in the first aspect of the invention, provided with a rescue operation canceling circuit for canceling the operation of the power failure occupant detection contact when a predetermined time elapses after the rescue operation is completed. Is.

In the elevator power failure operation device according to a fourth aspect of the present invention, in the first aspect of the invention, the battery voltage and the control circuit power supply voltage are set to be equal, and the power failure control circuit is provided from the second inverter side. A power supply switching circuit that is cut off and connected to the battery is provided.

The elevator power failure operation device according to a fifth aspect of the present invention is the elevator according to the first aspect of the present invention, in which an indicator lamp that lights up during a power failure and a door opening button that is illuminated by this indicator lamp are provided in the car. A door-open rescue circuit for operating the passenger detection and storage means when the open button is operated is provided.

In addition, an elevator power failure operation device according to a sixth aspect of the present invention is the one according to the first aspect of the present invention, in which a cut-off switch for invalidating the operation of the passenger detection and storage circuit by an artificial operation is provided.

[0017]

In the first aspect of the present invention, the presence of passengers in the car during normal operation is detected and stored, and the presence of passengers in the car is stored when the rescue operation condition during a power failure is satisfied. Since the batteries are connected to the first and second inverters, the batteries are not connected to the first and second inverters even when there is no passenger in the car during the power failure.

Further, in the second aspect of the invention, since the operation of the power failure passenger detection contact is retained during the rescue operation, the operation of the power failure passenger detection contact is retained even if the passenger is rescued.

Further, in the third aspect of the invention, the operation of the power failure passenger detection contact is released after a lapse of a predetermined time after the rescue operation is completed, so that the various operations at the time of the power failure are automatically reset after the rescue operation is completed.

Further, in the fourth aspect of the invention, the battery voltage and the power supply voltage for the control circuit are set to be equal, and the battery is connected to the control circuit at the time of power failure, so the load of the second inverter is reduced.

Further, in the fifth aspect of the invention, the door open button is illuminated by the indicator light at the time of power failure, and when the door open button is operated, it is memorized that there is a passenger.
Even if the weight of the passenger is light and the load detector does not work,
It becomes possible to memorize that there are passengers.

Further, in the sixth aspect of the invention, since the memory of the presence of the passenger is reset by operating the cut-off switch, the battery is cut off by operating the cut-off switch.

[0023]

【Example】

Example 1. 1 to 3 are views showing an embodiment of the first to third inventions of the present invention, FIG. 1 is an overall configuration diagram, and FIGS. 2 and 3 are passenger detection memory circuit diagrams, which are similar to those of the conventional device. Portions are denoted by the same reference numerals (the same applies to the following embodiments).

In FIG. 1, 1 is a commercial three-phase AC power supply, and 2
Is a main circuit contact that is connected to the three-phase AC power supply 1 and that is closed when the elevator is running and that is open when the elevator is stopped. 3 is a converter that is connected to the main circuit contact 2 and that converts a three-phase AC voltage into a DC voltage.
Is a smoothing capacitor for smoothing the output voltage of the converter 3, 5 is a first inverter connected to the smoothing capacitor 4 for converting a DC voltage into a three-phase AC voltage of a variable voltage and a variable frequency, and 6 is a first inverter 5 An elevator-driving three-phase induction motor connected to the AC side, and 7 is a drive sheave that is coupled to the electric motor 6 and drives a car 8 and a counterweight 9.

Reference numeral 10 is an in-car operation panel installed in the car 8 and is provided with a destination call button for registering a call for a destination floor, a door open button 12 and a door close button 13 operated when the door is opened and closed. 14 is a load detector for detecting the presence or absence of passengers in the car 8, 15 is a second inverter whose DC side is connected to the DC side of the converter 3, and 16 is a primary side which is connected to the AC side of the second inverter 15. Transformer, 17A, 17
B is a rectifier connected to the secondary side of the transformer 16, 18A,
Reference numeral 18B is a smoothing capacitor connected to the output side of the rectifiers 17A and 17B.

Reference numeral 19 is a control circuit for controlling the first inverter 5 by being supplied with power via the rectifiers 17A and 17B.
Reference numeral 0 is a battery for operation during a power failure, and 21a and 21b are normally open contacts of the power failure passenger detection relay 21 (FIG. 3), which are connected between the battery 20 and the inverter 15, and the contacts 21a and the inverter 15 are connected.
A diode 22 is inserted between the two. 23 is a battery 2
0, the cage 8 connected to the load detector 14 and the control circuit 19
It is a passenger detection storage circuit that detects the presence or absence of an internal passenger and stores the information.

[0027] In FIG. 2, (+) (-) DC power supply, V _BAT made by the control circuit 19 (+), V _{B AT} (-) is very power, 14a is load detector supplied from the battery 20 Load detection relay contact that closes when 14 operates, 26 door open detection relay contact that closes when the door opens during a power failure, 27 passenger detection relay, 28 door open button relay, 29 a car during a power failure 8
Door-opening button indicators for displaying the position of the door-opening button 12 to passengers therein, 30a is a power failure detection relay contact that opens when a power failure is detected, and 30b and 30c are power failure detection relay contacts that are also closed.

In FIG. 3, 31 is a passenger detection storage circuit 2.
Capacitors constituting the main part of 3, 32 to 34 are resistors that limit the charging / discharging current of the capacitor 31, 35 is a rescue operation condition relay contact that is closed when a power failure is detected, 36 is resistors 37, 38 and capacitors Contact point 35 composed of 39
A filter circuit for eliminating the interruption of the current due to the chattering (hereinafter referred to as chattering removal), 40 is an AND element,
41 and 42 are resistors, and 43 is a MOS field effect transistor (hereinafter referred to as FET) connected in series with the power failure passenger detection relay 21 and connected between the emergency power supply V _BAT (+) and the ground.
The gate is connected to the AND element 40 via the resistor 41. 21 c is a normally open contact of the power failure passenger detection relay 21.

44 and 45 are Zener diodes and resistors for supplying power from the emergency power source 20 to the AND element 40, and 4
A reverse current prevention diode 6 of the capacitor 31 is connected in series with the normally open contact 28a of the door open button relay 28 (FIG. 2) and is connected between the contact 35 and the resistor 33. 47
Is a charge discharge prevention diode of the capacitor 31, which is connected in series with the Zener diode 48 and is connected between the DC power source (+) and the resistor 32.

The passenger detection relay 27 is composed of a resistor 50 and a capacitor 51, and is connected to a DC power source (+).
A chattering-removing filter circuit of the normally closed contact 27a (see FIG. 2), 52 is a Zener diode, 53 is a transistor for discharging the electric charge of the capacitor 31, and its base is connected to the Zener diode 52 via the resistor 54. . Reference numeral 55 is a resistor for stably operating the transistor 53 together with the resistor 54.

Reference numeral 56 is a passenger presence detecting and holding circuit which is connected to the contact 21c and is composed of a transistor 57, a capacitor 58 and resistors 59 to 61, and 62 is a rescue operation canceling circuit which is connected to the resistor 33 and includes a transistor 63 and resistors 64 and 65. 66 is a normally open contact of a rescue operation release relay (not shown) that closes after a lapse of a predetermined time after completion of the rescue operation
Is a battery disconnection switch operated during maintenance.

Next, the operation of this embodiment will be described. The operation during normal operation is as described in FIG. At this time, the control power of the control circuit 19 is supplied via the inverter 15. That is, the output voltage of the converter 3 is converted into an AC voltage by the inverter 15 and transformed by the transformer 16. Then, the secondary voltage is converted into direct current by the rectifiers 17A and 17B, smoothed by the smoothing capacitors 18A and 18B, and supplied.

During normal operation, the door open detection relay contact 26 is open. When a passenger gets on the car 8, the load detector 14 operates and the load detection relay contact 14a is closed, the passenger detection relay 27 is energized, and the contact 27a is opened. with this,
The transistor 53 is turned off, and (+)-48-47-32-
33-31-The capacitor 31 is charged in the ground circuit,
You will remember that there are passengers. However, during normal operation, since the rescue operation condition relay contact 35 is open, the AND condition of the AND element 40 is not satisfied, and the power outage passenger detection relay 21 is not energized.

When the passenger gets off the car 8, the load detection relay contact 14a is opened, the passenger detection relay 27 is deenergized, the contact 27a is closed, and the transistor 53 is turned on. Now, the charge of the transistor 31 is 31-33-5.
3-Discharged through the ground circuit and remember that there are no passengers.

Next, the operation at the time of power failure will be described. When the capacitor 31 is charged and a power failure occurs while remembering that there are passengers, the rescue operation condition relay contact 35
Is closed, the AND condition of the AND element 40 is satisfied, the power failure passenger detection relay 21 is energized, and the contacts 21a,
21b is closed and the battery 20 is connected to the inverter 15. The elevator will now perform the rescue operation as described above.

On the other hand, since the contact 21c is closed, the base current flows through the transistor 57 through the resistor 59, so that the contact 21c is turned on and the power failure passenger detection relay 21 is self-held. Further, since the transistor 57 is turned on, the transistor 53 remains off. In this way, the rescue operation is performed, the car 8 is driven to the nearest floor by the power of the battery 20, the door is opened, and the passenger is rescued.

When a predetermined time has passed since the passenger was rescued and the door was closed, the rescue operation end relay contact 66 is closed. This turns on the transistor 63 and turns on the capacitor 3
The charge of 1 is discharged. The rescue operation cancellation circuit 62 continues to operate until the power failure passenger detection relay 21 is deenergized.
As a result, the charge of the capacitor 31 disappears, the AND condition of the AND element 40 no longer holds, the power failure passenger detection relay 21 is deactivated, and the rescue operation is completed.

Example 2. 4 and 5 show a fourth embodiment of the present invention.
FIG. 4 is a diagram showing an embodiment of the invention, FIG. 4 is an overall configuration diagram, and FIG. 5 is a passenger detection memory circuit diagram. 2 is also used in the second embodiment. In FIG. 4, 71 is a power failure passenger detection relay 2
1 is a power supply switching relay contact that is opened after the operation of 1, 1 is a power supply switching relay contact that is also closed, and the contact 71 is a rectifier 1
It is inserted on the output side of 7B. Also, the contacts 21a, 2
1b and the smoothing capacitor 18B are connected, and a contact 72 and a diode 73 are inserted between them.

In this embodiment, the voltage V _ccn supplied to the control circuit 19 and the voltage V _{BAT of the} battery 20 are set to be equal. Then, at the time of power failure, the battery 20 is _supplied before the control circuit 19 is reset due to the decrease in the power supply voltage V _ccn of the control circuit 19.
Is to be connected. Other than the above, it is the same as FIG. 5, the contact 21c, the passenger presence detection and holding circuit 56, the rescue operation release circuit 62, the contacts 66 and 28a and the diode 46 are removed from FIG. 1, and the battery disconnection switch 67 is connected in parallel to the contact 27a. .

Next, the operation of this embodiment will be described. The normal operation and the rescue operation when the passenger is not in the car 8 are the same as in the first embodiment. That is, when the passenger is in the car 8, the load detection relay contact 14a is closed, the passenger detection relay 27 is energized and the contact 27a is opened, and the voltage is applied to the capacitor 31 so that the passenger is in the car 8
I remember being in

When a power failure occurs at this time, the power failure passenger detection relay 21 is energized and the contacts 21a and 21b are closed due to the AND condition with the rescue operation condition relay contact 35.
On the other hand, the power supply switching relay contact 71 is opened and the contact 72 is closed. Therefore, when switching from the battery 20 power supply to the control circuit 19, the power supply voltage V _ccn is the smoothing capacitor 18
While held in B. Therefore, the passenger detection relay 27 is not deenergized and the contact 27a is not closed. Then, when the car 8 runs and stops at the nearest floor and the door opens, the door open detection relay contact 26 is closed. Now the passengers in the car 8 are rescued and the load detection relay contact 1
Even if 4a is opened, the passenger detection relay 27 continues to be energized as long as the door open state continues.

After that, when the door is closed, the contact 26 is opened. At this time, the contact 14a is also opened, so that the passenger detection relay 27 is deenergized, the contact 27a is closed, the transistor 53 is turned on, and the capacitor is turned on. The charge of 31 is discharged. Therefore, the AN with the rescue operation condition relay contact 35
The D condition is no longer satisfied, the power failure passenger detection relay 21 is deactivated, and the rescue operation of the elevator ends. here,
The contacts 71 and 72 form a power supply disconnection circuit. Thus, the voltage V _ccn supplied to the control circuit 19 and the battery 20
Since the voltages V _BAT are set to be equal, the load on the inverter 15 is reduced and the capacity of the battery 20 can be reduced.

Example 3. This embodiment shows an embodiment of the fifth invention of the present invention and will be described with reference to FIGS. When a light weight person such as a child gets into the car 8 during a power failure, the load detection relay contact 14a may not close. In this case, the power failure detection relay contact 30a is opened,
Since the contacts 30b and 30c are closed, the door open button indicator light 29 is turned on and the door open button 12 is illuminated.
Then, when the passenger pushes the door open button 12, V _{BA T} -30
The door open button relay 28 is energized by the circuit b-12-28-V _BAT (-), and the contact 28a is closed.

Thus, the capacitor 31 becomes the diode 46.
Be charged through. As a result, the AND condition with the rescue operation condition relay contact 35 is satisfied, and the power failure passenger detection relay 21 is activated. Hereinafter, the rescue operation similar to that of the first embodiment is started. Here, the contact 28a constitutes a door-open rescue circuit. As described above, even when the load detector 14 does not operate, the rescue operation can be performed by the passenger's operation.

Example 4. This embodiment shows an embodiment of the sixth invention of the present invention and will be described with reference to FIGS. 3 and 5. During maintenance, when a maintenance person turns on the battery disconnection switch 67, the transistor 63 of the rescue operation release circuit 62 is turned on, and the charge of the capacitor 31 is discharged. Therefore, even if the breaker (not shown) of the AC power supply 1 is cut off to create a power failure state, the battery 20 is not connected to the rescue operation device.

The same applies to the case of FIG. 5, and when the battery disconnection switch 67 is turned on, the transistor 53 is turned on, and the electric charge of the capacitor 31 is discharged. As described above, during maintenance and inspection, it is possible to smoothly proceed with maintenance work without automatically shifting to the rescue operation due to the operation of the circuit breaker. Further, even if the rescue operation device and the control device are provided separately, the maintenance personnel can disconnect the battery 20 on the control device side, and the rescue operation during maintenance or the rescue operation during normal operation due to forgetting to operate the battery disconnection switch. It becomes possible to eliminate the disability.

[0047]

As described above, according to the first aspect of the present invention, it is possible to detect and memorize the presence of passengers in the car during normal operation, and to detect passengers in the car when the rescue operation condition during a power failure is satisfied. If it is stored, the battery is connected to the first and second inverters, so the battery will not be connected to the first and second inverters even when there is no passenger in the car during a power failure. Unlike the case where the battery and the rescue operation device are always connected when a power failure occurs, there is an effect that the power consumption of the battery can be further reduced and a reliable passenger rescue operation can be realized with an inexpensive configuration.

Further, in the second aspect of the invention, since the operation of the power failure passenger detection contact is retained during the rescue operation, the operation of the power failure passenger detection contact is retained even if the passenger is rescued, and the end of the rescue operation is confirmed. There is an effect that can be.

Further, in the third aspect of the invention, the operation of the power failure passenger detection contact is canceled after a lapse of a predetermined time after the end of the rescue operation, so that the various operations at the time of the power failure are automatically reset after the end of the rescue operation. There is an effect that can be prepared for the operation at the time of power failure.

Further, in the fourth invention, the battery voltage and the power supply voltage for the control circuit are set equal to each other, and the battery is connected to the control circuit at the time of a power failure. Therefore, the load of the second inverter is reduced and the second inverter is reduced. There is an effect that the cost of the inverter can be reduced.

Further, in the fifth invention, the door open button is illuminated by the indicator light at the time of a power failure, and when the door open button is operated, it is memorized that there is a passenger, so that the weight of the passenger is light. Even when the load detector does not operate, it is possible to store the presence of passengers, and it is possible to realize a reliable rescue operation.

Further, in the sixth aspect of the invention, since the memory of the presence of the passenger is reset by operating the cut-off switch, the battery is cut off by operating the cut-off switch, and an inexpensive battery cut-off switch is provided. You can In addition, even if the rescue operation device and the control device are placed separately, maintenance personnel can cut off the battery on the control device side, and it is possible to eliminate the inability to perform rescue operation due to forgetting the switch operation on the rescue operation device side. There is.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a passenger detection memory circuit diagram of FIG.

FIG. 3 is a passenger detection memory circuit diagram of FIG. 1.

FIG. 4 is an overall configuration diagram showing a second embodiment of the present invention.

5 is a passenger detection storage circuit diagram of FIG. 4;

FIG. 6 is an overall configuration diagram showing a conventional elevator power failure operation device.

[Explanation of symbols]

1 three-phase AC power supply, 3 converter, 5 first inverter, 6 three-phase induction motor, 8 car, 12 door open button, 14 load detector, 14a load detection relay contact,
15 2nd inverter, 19 control circuit, 20 battery, 21 blackout passenger detection relay, 21a-21c blackout passenger detection relay contact, 23 passenger detection memory circuit, 27
Passenger detection relay, 27a Passenger detection relay contact, 28a
Door open rescue circuit (door open button relay contact), 29 door open button indicator light, 30b, 30c power failure detection relay contact,
31 passenger detection storage means (capacitor), 35 rescue operation condition circuit (rescue operation condition relay contact), 40 AND
Element, 56 Passenger presence detection holding circuit, 62 Rescue operation cancellation circuit, 66 Rescue operation cancellation circuit (rescue operation cancellation relay contact), 67 Battery disconnection switch, 71, 72 Power switching circuit (power switching relay contact).

Claims (6)

[Claims] 1. A converter for converting a commercial AC power source into a DC voltage, a first inverter for converting an output of the converter into a variable voltage / variable frequency AC voltage and supplying the same to a car driving motor, and the first inverter. Of the control circuit for controlling the inverter of No. 2, a second inverter for supplying electric power to this control circuit, a battery for supplying DC power at the time of power failure of the commercial AC power supply, and detection of the presence of passengers in the car during normal operation. And a rescue operation condition circuit that operates when the power failure is detected, and when the rescue operation condition circuit and the passenger detection memory device operate, the battery is transferred to the first and second inverters. An elevator power failure operation device equipped with a power failure passenger detection contact to be connected. 2. The elevator power failure operation device according to claim 1, further comprising a passenger presence detection holding circuit that holds the operation of the power failure passenger detection contact during rescue operation. 3. The elevator power failure operating device according to claim 1, further comprising a rescue operation canceling circuit for canceling the operation of the power failure passenger detection contact after a lapse of a predetermined time after the rescue operation is completed. 4. A power supply switching circuit for setting the battery voltage and the control circuit power supply voltage equal, and disconnecting the control circuit from the second inverter side and connecting to the battery when a commercial AC power supply fails. The operation device for an elevator during a power failure according to claim 1. 5. A car is provided with an indicator light that lights up in the event of a power failure and a door open button illuminated by this indicator, and a door open rescue circuit that operates passenger detection and storage means when the door open button is operated. Elevator power failure operation device characterized by 6. The elevator power failure operation device according to claim 1, further comprising a cut-off switch for invalidating the operation of the passenger detection and storage circuit by an artificial operation.