JPH115676A - Automatic landing device for elevator power failure - Google Patents

Abstract

(57) [Summary] [Problem] When confirming the operation at the time of power failure of commercial AC power supply,
Providing an automatic landing device for elevators during a power outage that can reduce the shock of stopping the car. SOLUTION: A power failure detector 11 for detecting a power failure of a commercial AC power supply 1 is provided with a command output unit 19 for outputting a control command in response to an operation of an operation check switch 18, and controls a motor 7 for driving a car 16 The apparatus 10 includes a switching control unit 20 that outputs a command to switch from the commercial AC power supply 1 to the battery 14 after stopping the car 16 by driving the commercial AC power supply 1 in response to the control command. When the car 16 is positioned outside the door opening / closing zone, the maintenance staff operates the operation confirmation switch 18 to smoothly stop the car 16 between the floors using the commercial AC power supply 1, and then the battery 14 Drives the car 16 to the nearest floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator power failure automatic landing apparatus for driving a car to the nearest floor by driving a battery when a commercial AC power supply fails.

[0002]

2. Description of the Related Art Generally, in an elevator, when a car is driven by a commercial AC power supply and the car stops between floors due to a power outage of the commercial AC power supply, passengers are trapped in the car. In order to prevent such an accident, an automatic power-on landing device for an elevator that drives the car to the nearest floor by driving a battery at the time of a power failure of a commercial AC power supply is provided. In order to prevent the above-mentioned passenger confinement accident, it is important for the automatic landing device to operate reliably when the commercial AC power source fails, so the battery is driven during the maintenance and inspection of the elevator. Driving the car and checking the operation at that time.

FIG. 3 is an explanatory view showing this kind of conventional automatic landing apparatus at the time of power failure, and FIG. 4 is a flowchart showing a processing procedure of the automatic landing apparatus at the time of power failure of FIG.

The elevator shown in FIG. 3 is connected to a commercial AC power supply 1 for supplying three-phase AC power, a switch (so-called FFB) 1a for opening and closing the supply path of the commercial AC power supply 1, and connected to the switch 1a. A main converter 2 for converting AC power to DC power, a smoothing capacitor 3 connected to the output side of the main converter 2 for smoothing the DC power,
A main inverter 4 is connected to the smoothing capacitor 3 and converts the smoothed DC power into a variable voltage and variable frequency AC power, and a control device 10 for controlling the output voltage of the main inverter 4. .

An electric motor 7 for driving a hoisting sheave 6 is connected to the output side of the main inverter 4. A magnet shaft device 5 for braking the electric motor 7, a rotational speed of the electric motor 7, And a speed detector 8 for detecting the speed. The power is supplied from the commercial AC power supply 1 to the magnet brake device 5 and the control device 10 via the control power supply device 9.

As shown in FIG. 3, an automatic landing device for power failure provided in the elevator includes a battery 14 for supplying DC power when the commercial AC power source 1 fails, and a charger 15 for charging the battery 14. , An inverter 12 for converting the DC power into three-phase AC power,
The voltage of the three-phase AC power output from
A transformer 13 connected to the secondary side of the switch 1a for detecting a power failure of the commercial AC power supply 1, and a power failure detector 11 connected to the secondary side of the switch 1a.
And an operation check switch 18 for inputting an operation check signal for checking the operation.

The power failure detector 11 has a first contact Rya1 provided between the switch 1a and the main converter 2, a second contact Rya2 provided between the switch 1a and the control power supply 9, It has a third contact Ryb1 interposed between the battery 14 and the main converter 2, and a fourth contact Ryb2 interposed between the step-up transformer 13 and the control power supply 9, and these power failure detectors 11, And contact Rya
1, Rya2, Ryb1, and Ryb2 constitute a power supply switching means for switching from the commercial AC power supply 1 to the battery 14. In this power supply switching means, the first
Contact Rya1 and second contact Rya2 are closed, respectively, and third contact Ryb1 and fourth contact R
yb2 is kept open. On the other hand, when a power failure of the commercial AC power supply 1 is detected or when the operation check switch 18 is operated, the first contact Rya1 and the second contact Rya2 are opened, and the third contact Ryb1 is opened.
And the fourth contact Ryb2 respectively closes,
A power failure occurrence signal is output from power failure detector 11 to control device 10, and a start command is output to inverter 12.

[0008] In this conventional power failure automatic landing device, the operation of the commercial AC power supply 1 at the time of power failure is confirmed according to the processing procedure shown in FIG. That is,
At step S21, the maintenance person operates the car 16 and the counterweight 17 at high speed, and at step S22, it is determined whether the position of the car 16 is in the door opening / closing zone. For example, when the position of the car 16 is in the door opening / closing zone, the maintenance person operates the operation check switch 1 in step S23.
8 is operated, a first contact Rya1 is performed in step S24.
Then, the second contact Rya2 is opened, the elevator is disconnected from the commercial AC power supply 1, and a pseudo power failure state occurs, and the output voltage from the control power supply device 9 disappears. As a result, the power supply to the electric motor 7 is cut off, and the magnet brake device 5 is released when the power supply from the control power supply device 9 is cut off in step S25, so that the car 16 and the counterweight 17 are moved at high speed in step S26. Stop suddenly from the operating state.

Simultaneously with the occurrence of the above-described power failure state, the power failure detector 11 outputs a power failure occurrence signal to the control device 10 to maintain the released state of the magnet brake device 5 and, at step S27, to the inverter 12 The inverter 12 outputs a start command and converts the DC power of the battery 14 into three-phase AC power. Next, step S28
The power failure detector 11 is connected to the third contact Ryb1 and the fourth contact Ryb1.
By closing each of the contacts Ryb2, a circuit using the battery 14 as a power supply is formed, whereby the control power supply 9 is supplied with the three-phase AC power converted by the inverter 12, and the motor 7 of the elevator main circuit is supplied to the control power supply 9. The DC power of the battery 14 is supplied via the third contact Ryb1.

Next, with the supply of the three-phase AC power converted by the inverter 12, the control device 10 is restarted in step S29, and in step S30, the battery 14 responds to the power failure occurrence signal output from the power failure detector 11. Starts operation with the power supply. Thereafter, as the step S31, the car 16
Arrives at the nearest floor, stops the inverter 12 in step S32, and contacts Rya1, Ray in step S33.
2 are opened and the other contacts Ryb1, Ryb2
To return to normal operation using the commercial AC power supply 1. At this time, in step S34, the maintenance person determines whether a series of operations using the battery 14 as a power source has been normally performed,
As a result, when a series of operations using the battery 14 as a power source is normal, the operation check of the automatic landing device at the time of power failure ends, while when the series of operations is abnormal, the procedure S
As 35, the cause is investigated and necessary measures are taken, and then the operation check is terminated.

[0011]

By the way, in the above-mentioned conventional automatic landing apparatus at the time of a power failure, the maintenance AC switch 18 is operated by the maintenance staff to disconnect the commercial AC power supply 1 during the high-speed operation of the elevator. Since the electric power supply to the electric motor 7, the magnet brake device 5 and the control power supply device 10 is cut off, the car 16 is rapidly braked by the operation of the magnet brake device 5, thereby considerably stopping the elevator equipment as well as the building. There was a problem of shock.

The present invention has been made in view of such circumstances in the prior art, and has as its object to reduce the shock of stopping a car when confirming the operation during a power failure of a commercial AC power supply. To provide an automatic landing device at the time of a power failure.

[0013]

In order to achieve this object, the present invention provides a battery for supplying DC power when a commercial AC power supply fails, a charger for charging the battery, and a three-phase AC power supply for charging the DC power. An inverter that converts the power, a boost transformer that boosts the voltage of the three-phase AC power output from the inverter until the voltage corresponds to the voltage of the commercial AC power supply, a power failure detector that detects a power failure of the commercial AC power supply, An operation check switch for inputting an operation check signal for checking the operation of the power failure detector; and power supply switching means for switching from the commercial AC power supply to the battery, wherein the car is driven by driving the battery when the commercial AC power supply fails. A command output unit for outputting a control command in response to operation of the operation check switch in an automatic landing device for power failure of an elevator that drives to the nearest floor A switching control unit that stops the car by driving the commercial AC power supply in response to the output of the control command, and then activates the power supply switching unit, wherein the car is driven by the commercial AC power supply. When this car is located outside the door opening / closing zone during high-speed operation of
A maintenance worker operates the operation check switch to temporarily stop the car between floors by driving the commercial AC power supply, and then operates the power supply switching unit to drive the car by driving the battery. It is configured to drive to the nearest floor.

In the present invention constructed as described above, the car during high-speed operation is smoothly braked using a commercial AC power supply in the same state as in normal operation to temporarily stop between floors, and then the power supply is switched. Activate the means and drive the car to the nearest floor by driving the battery. Thereby, when checking the operation at the time of the power failure of the commercial AC power supply, the stop shock of the car can be reduced.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an automatic landing apparatus for a power failure of an elevator according to the present invention.
FIG. 1 is an explanatory view showing an automatic landing device for power failure of an elevator according to an embodiment of the present invention, and FIG. 2 is a flowchart showing a processing procedure of the automatic landing device for power failure in FIG. In FIG. 1, the same components as those shown in FIG. 3 described above are denoted by the same reference numerals.

In the automatic landing apparatus at the time of power failure of this embodiment shown in FIG. 1, a control command is output to the power failure detector 11 in accordance with the operation of the operation confirmation switch 18 as compared with the apparatus shown in FIG. A command output unit 19 is provided, and the control unit 10 is controlled by the commercial AC power supply 1 in response to the control command to the car 16.
Is mainly provided in that a switching control unit 20 that outputs a disconnection command after landing on a floor (not shown) is provided, and other configurations are basically the same.

In this embodiment, the operation at the time of a power failure of the commercial AC power supply 1 is confirmed according to the processing procedure shown in FIG. That is, the maintenance person operates the car 16 and the counterweight 17 at high speed in step S1, and determines whether the position of the car 16 is in the door opening / closing zone in step S2. For example, car 1
When the operation check switch 18 is operated in step S3 when the position of 6 is outside the door opening / closing zone, the command output unit 19 of the power failure detector 11 outputs a control command to the switching control unit 20 of the control device 10 in step S4. In step S5, the switching control unit 20 starts operating according to the control command, and controls the output voltage and output frequency of the main inverter 4 based on the rotation speed of the electric motor 7 detected by the speed detector 8. Thus, after the car 16 is braked between floors in the same manner as in the normal state using the commercial AC power supply 1, that is, the car 16 is smoothly braked and temporarily stopped, and then the switching control unit 20 is performed in step S6.
And outputs a disconnection command to the power failure detector 11.

Next, in step S7, the power failure detector 11
The first contact Rya1 and the second contact Rya2 are respectively opened and disconnected from the commercial AC power supply 1 in response to the disconnection command, whereby the elevator enters a pseudo power failure state and the output from the control power supply 9 The voltage disappears,
As a result, the control device 10 stops. At this time, the power failure detector 11 outputs a power failure occurrence signal to the control device 10 and holds the signal. The above-mentioned contacts Rya1, Rya2
In step S8, the power failure detector 11 outputs a start command to the inverter 12 in step S8.
Converts the DC power of the battery 14 into three-phase AC power.
Next, in step S9, the power failure detector 11 sets the third contact R
By closing the yb1 and the fourth contact Ryb2, respectively, a circuit using the battery 14 as a power supply is formed, whereby the control power supply 9 is supplied with the three-phase AC power converted by the inverter 12 and the motor 7 Is supplied with the DC power of the battery 14 via the third contact Ryb1.

Next, with the supply of the three-phase AC power converted by the inverter 12, the control device 10 is restarted in step S 10, and in step S 11, in response to the power failure occurrence signal output from the power failure detector 11, Operation is started using the power supply 14. After that, the car 1 is set in step S12.
6 arrives at the nearest floor, stops the inverter 12 in step S13, and contacts Rya1, Ra in step S14.
y2 is opened and the other contacts Ryb1, Ryb
2 is closed to return to normal operation using the commercial AC power supply 1.
At this time, in step S15, the maintenance person determines whether a series of operations using the battery 14 as a power supply has been performed normally. As a result, if the series of operations using the battery 14 as a power supply is normal, When the operation check at the time of the power failure of 1 is ended, on the other hand, if the above-described series of operations is abnormal, the cause is investigated as a step S16, necessary measures are taken, and then the operation check is ended.

In the embodiment configured as described above, when confirming the operation of the commercial AC power supply 1 at the time of power failure, the car 16 during high-speed operation is smoothly operated using the commercial AC power supply 1 in the same state as the normal state. After the car 16 is temporarily stopped between the floors, the car 16 is driven to the nearest floor by driving the battery 14, so that the stop shock applied to the elevator equipment and the building can be reduced.

[0021]

As described above, the present invention is constructed as described above. After the car during the high-speed operation is temporarily stopped between the floors by using the commercial AC power supply, the car is driven to the nearest floor by driving the battery. Drive until Therefore, there is an effect that the stop shock applied to the elevator equipment and the building can be reduced when checking the operation at the time of the power failure of the commercial AC power supply.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an automatic landing device for a power failure of an elevator according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of the automatic landing device at the time of power failure in FIG. 1;

FIG. 3 is an explanatory view showing a conventional example of an automatic landing device at the time of a power failure of an elevator.

FIG. 4 is a flowchart illustrating a processing procedure of the automatic power-on landing apparatus of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commercial AC power supply 7 Electric motor 9 Control power supply device 10 Control device 11 Power failure detector 12 Inverter 13 Boost transformer 14 Battery 15 Charger 16 Car 18 Operation check switch 19 Command output unit 20 Switching control unit Rya1, Rya2 Contact Ryb1, Ryb2 Contact

Continued on the front page (72) Inventor Rei Ishida 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Inside the Hitachi Building System Co., Ltd. (72) Inventor Keijiro Amano 2477 Takaba, Hitachinaka City, Ibaraki Prefecture Within Hitachi Car Engineering Co., Ltd.

Claims (2)

[Claims] 1. A battery that supplies DC power when a commercial AC power supply fails, a charger that charges the battery, an inverter that converts the DC power into three-phase AC power, and a three-phase output from the inverter. A step-up transformer that boosts the voltage of the AC power until it corresponds to the voltage of the commercial AC power supply, a power failure detector that detects a power failure of the commercial AC power supply, and an operation confirmation signal that confirms the operation of the power failure detector are input. An operation confirmation switch, and a power switching means for switching from the commercial AC power supply to the battery, wherein the automatic landing device for a power failure of an elevator that drives the car to the nearest floor by driving the battery when the commercial AC power supply fails. A command output unit that outputs a control command according to an operation of the operation check switch; and a commercial AC power supply that outputs the control command according to the output of the control command. After the passenger cage is stopped by the drive, and a switching control unit for operating the power switching means, the multiplication during high-speed operation of the car in the driving of the commercial AC power source,
When the car is located outside the door opening / closing zone, after a maintenance staff operates the operation check switch and temporarily stops the car between floors by driving the commercial AC power supply,
An automatic landing apparatus for an elevator during a power failure, wherein the power supply switching means is operated to drive the car to the nearest floor by driving the battery. 2. The control device according to claim 1, wherein the power failure detector includes the command output unit, and a control device of a motor for driving the car includes the switching control unit.
The automatic landing device at the time of a power failure of the elevator described in the above.