JPH02198994A - Automatic floor setting device for ac elevator - Google Patents

Abstract

PURPOSE:To permit the safe and speedy refuge even after the getting-off from the cage of an elevator by controlling a dc/ac converter and installing a control means for the emergent operation in which the operation to a destinated floor which is previously determined for the easy refuge. CONSTITUTION:A dc/ac motor IM is driven by a dc/ac converter 10, having a battery 8 as electric power source, and controlled by a control means 7 for the emergent operation, and a destination floor which is previously determined for the easy refuge is detected, and an elevator is reached. Therefore, the passengers in a cage C can be rescued speedily.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an emergency automatic landing device for rescuing passengers trapped in an elevator car in the event of an emergency due to loss of power or breakdown due to a power outage or the like. It is about improvement.

[Conventional technology]

As a conventional AC elevator operating system during a power outage, there are two known systems, such as those shown in Japanese Utility Model Application Publication No. 59-116360.

In this conventional device, the regular power supply (R68
. If at this time,
When it is detected that the elevator car is located between the 2nd and 3rd floors, and that the weight on the side of the car is lighter than the weight on the main side, the inverter uses the battery as a power source to convert the direct current into three-phase alternating current. Moreover, by selecting the phase rotation of the inverter output so as to raise the car at this time, the three-phase AC motor is driven, and the car is brought to the nearest floor (3F in this case) and stopped. This makes it easier to rescue passengers inside the elevator car. With this configuration, the elevator passenger rescue device in the event of a power outage moves in the light load direction and stops at the nearest floor, and is installed in each elevator, so the rescue time from inside the car is short and the inverter It is easier to control and requires less battery capacity.

[Problem to be solved by the invention]

The rescue device in the event of a power outage with the above configuration simply stops at the nearest floor, and after that, the person must use the stairs from that floor. in this case.

Passengers in wheelchairs may become stranded, and in an emergency where human life is at stake, such as when a building's power supply system or elevator control equipment malfunctions due to an earthquake or fire, it is necessary not only to rescue them from the car but also to remove them from the building. The problem of rescue remains.

Recently, there has been an increasing demand for consistent accident countermeasures that consider the safety of the entire building.

Conventional rescue devices have had the problem that in an emergency, it is not possible to place the elevator car on a specific floor, such as the first floor, where evacuation is easy after exiting the elevator.

Furthermore, it is known to install a private power generator in a building as a way to operate even during a power outage, but this equipment is expensive and difficult to install, and even if it was installed, it would be expensive. Since the rescue operation is carried out one car at a time with the capacity to fully operate one elevator, it takes time until the passengers in the car are finally rescued, and there are problems in that it cannot be used except during power outages. Ta.

This invention was made in order to solve the above-mentioned problems.It is possible to operate the elevator car to land on a designated return floor in an emergency, and the emergency automatic landing of an AC elevator is shortened in rescue time. The whole purpose is to obtain the equipment.

[Means to solve the problem]

The emergency automatic landing device according to the present invention uses a battery as a power source, drives an AC motor with a DC/AC converter, controls it with an emergency operation control means, and selects a predetermined designated floor where evacuation can be easily performed. Detection and implantation.

[Effect]

The emergency landing device according to the present invention outputs a frequency corresponding to the shibatsu voltage using DC/AC control, moves the car in emergency operation to a predetermined designated floor where evacuation can be easily carried out, and Rescue the passengers.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration E' of an example of the present invention, and FIG. 2 shows the relationship between the three-phase AC voltage applied to the AC motor and the frequency.

FIG. 3 is a principle diagram of PWM control, FIG. 4 is a speed/torque characteristic, and FIG. 5 is a flowchart of emergency rescue operation using this device.

In the figure, (1) is a control circuit during normal operation, (2) is a control power supply unit during normal operation, R, 8, and T are three-phase AC power supplies that receive power during normal operation, and N+ and N are DC output of control power supply (2), (3) is a fault detector.

(4) is 6 with failure detection relay! D, (451) is its normally closed contact, (5) is its rescue operation relay, (5a) is its normally open contact, (5b) (5c) is its normally closed contact, (6)
(7) is the contactor for normal operation, (7a) is its normally open contact # (7b) is its normally closed contact.

(8) is a battery that supplies direct current, (9) is a smoothing capacitor, a1 is a three-phase inverter, aυ is a regenerative resistor, (
I3 is the regenerative transistor, 0 is the control power supply for emergency rescue operation, E+, R- is the DC output of this control power supply, αhiro is the emergency runnable detector, and AS is for emergency rescue operation. (i5a) is its normally open contact, (15b) is its normally closed contact, (IS is the PWM control type inverter control circuit, aη is the emergency rescue operation control device, MFL is the designated return floor, BOT is the bottom floor, a is the designated return floor (MFL) detection position switch, (143 is the bottom floor (BOT) detection position switch, P(N/PO2)
C is a pulse generator that generates pulses proportional to the rotation speed of the electric motor (IM), and C is an elevator car.

Next, to explain the operation of the embodiment of the present invention, during normal operation, the failure detector (3) is opened and the failure detection relay (3) is opened.
4) is in decline. Therefore, rescue operation relay (5)
is energized. Therefore, the contact (5a) is closed/contact (
5b) (5c) is open. As a result, the output voltages E+ and H- of the control power supply device a3 do not exist, so the emergency rescue operation contactor a! 9 is deactivated.

The contact (15a) is open and the contact (15b) is closed. A call is made to the elevator, the direction of operation is determined, and if there is no problem with the travel-ready detector (6), the normal operation contactor (
7) is energized, the contact (7a) is closed, and the imprinter (IM) is operated and controlled by the speed feedback signal from the PGj and the control circuit 11), and normal operations such as starting, running, stopping, and opening/closing the door are performed. It will be done.

Next, if a power outage occurs when the heel (C) of the elevator in which a passenger has boarded is in the position shown in Figure 1, the normal three-phase AC power supply R,
8. Since T will no longer supply power, the control power supply device (2
) has no DC output N+, N-, and the rescue operation relay (5
) is deenergized and the elevator stops. During a power outage, the contact (5a) is open and the normal operation contactor (7) is not energized. On the other hand, since the contacts (5b) and (5c) are closed, the battery (8) is connected to the three-phase inverter aI and the control power supply unit t.
Connected to i3. With this, the current output is I! -)-,B
- is established, and when the emergency runnability detector I, which confirms the safety of the elevator, is established, the contactor for emergency rescue operation ([
! 9 is energized, the contact (15a) closes and the electric motor (I
M) becomes operational.

At the same time, a command is issued to the rescue operation control device aη to first operate in the downward direction, and the three-phase inverter is activated based on the feedback signal from the pulse generator PG2 and the command from the inverter control circuit αe. Output. In this case, PWM control (pulse width modulation) as shown in FIG. 3 is performed so that the voltage V and frequency f applied to the electric motor (IM) are basically constant as shown in FIG. However, in the low frequency range, voltage compensation is performed due to the influence of impedance. When the frequency f″lf is increased from small to large according to the speed pattern, the torque characteristic becomes as shown in Fig. Even in the case of lifting load operation in which the heavier one of (B) is raised, the motor torque is sufficient and it is possible to start the motor.In this case.

The rated speed is 60 m/m, although it varies depending on the voltage value of the battery (8) as emergency equipment, the rated speed of the elevator, etc.
Speed during rescue operation for indoor elevators (constant speed)
A speed of about 10 m/min is possible. If the load inside the car is heavy and the car is lowered in a lowering operation, it will be in a second regeneration state.

In this case, the regenerative energy is consumed by the regenerative resistor riυ by properly controlling the regenerative transistor 0 in a 0N10FF state so that the regenerative current is not returned to the battery (8). Figure 5 shows the flowchart of the rescue operation.If the designated return floor (MFL) is the lowest floor (B
Assume that the car (CJ) has stopped at the location shown in the diagram due to a power outage.

Regardless of the load inside the car, the car begins to descend according to a command from the rescue operation control device rLη. The basket cutter is the designated return floor (M
When the MFL detection position switch located a predetermined distance before the landing level of FL) is reached and turned ON, the
) is on the designated return floor: s and the rescue operation control device aη
is determined and commands are given to decelerate and stop. Due to the landing arrest, the passengers inside the car were rescued on this floor. Generally, the 1st floor is the designated return floor, so a path to the outside of the building is secured and passengers are guaranteed safety in any emergency.

If a power outage occurs and the position where the elevator heel (C) stops is below the designated return floor (MFL), the car will first be lowered and when it reaches the BOT floor, the bottom floor will be detected. When position switch +II is set to ONE, it decelerates and stops at -, but immediately reverses direction and drives the elevator in the ascending direction, and when it reaches the designated return floor (MFL) K, position switch a
1 is ONL, and the passengers in the car are similarly rescued.

As a procedure for rescue operation, regardless of the magnitude of the load inside the car, the first thing to do is to set the driving direction in the descending direction. 1. Normally, the designated return floor should be a lower floor (for example, 1y) that is safe and easy to rescue. This is because the number of floors is small, so the probability of driving in a direction away from the designated return floor is small, and the overall rescue time becomes longer.

If you use a private power generator to perform an elevator rescue operation, use the private power generator after the regular power supply has been cut off.

Generally, it takes about 1 to 2 minutes for the electric power to be established, and moreover, multiple elevators must be returned to the designated floor one after another.

For example, 6 stops (lifting distance 20m), rated speed Son/m
In, assuming that there are 6 elevators, find the average time until the final passenger is rescued.

becomes.

On the other hand, in the embodiment of the present invention, since it is much cheaper than a private power generator, it is possible to install this equipment in each elevator, and the rescue time for one passenger is on average 10 minutes under the same conditions. m/min, and there is no waiting time and the train moves downward, which has a great psychological effect on passengers.

The above describes the operation during power outages, but the failure detector (3) can also be used in situations other than power outage accidents.

In the event of an emergency such as an elevator malfunction or a fire, it is also possible to rescue passengers from being "trapped" in a car when the elevator malfunctions.

In this case, there is no power outage, and the DC output N-1-N- of the control power supply (2) is alive, so the fault detector (3)
When the relay detects an abnormality and closes, the failure detection relay (4) is energized. As a result, the contact (4a) opens and the rescue relay (
5) will be deenergized, so the sequence of rescue operations will be the same as in the case of a power outage.
Rescued by L).

In addition, as a countermeasure in case of an emergency caused by a failure of the elevator control device, etc., for example, a pulse generator (P
Rescue operation can be carried out effectively by providing a pulse generator (PO2) and a pulse generator (PO2) for emergency operation.

In the above explanation, the procedure for rescue operation is to first perform downward operation.1 For example, by providing a car position storage device, all the positions of the car corners can be confirmed, and from there, the car can go directly to the designated return (MFL). is also possible.

〔Effect of the invention〕

As described above, according to the present invention, in the event of an abnormality such as a power outage, the battery is used as a power source, the sound of the DC/AC converter is used to drive the electric motor, and the elevator is operated as an emergency operation control means, for example, on the first floor. Since the elevator is driven to a designated floor where evacuation from the elevator can be easily performed, an emergency rescue device for elevators that can safely and quickly evacuate even after exiting the car, has a short rescue time, and is inexpensive. effective.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIGS. 2 to 4 are explanatory diagrams of characteristics of the embodiment of the invention. FIG. 5 is a flowchart of an embodiment of the invention, Section 6.7
The figure shows the configuration of a conventional example. (3) is a failure detector, (5) is a rescue operation relay, (the tree is a battery, the back is a PMW three-phase inverter, the fin is a rescue operation control device, and the α frame is a return designation. The position switch for floor detection is shown. In addition, the same reference numerals in the figure indicate the same or corresponding parts. 1st rA

Claims (1)

[Scope of Claims] A battery power supply device as an emergency power supply that switches from a regular power supply to supply direct current when an abnormality in the elevator is detected; and a battery power supply device that converts the direct current supplied from the battery power supply device into alternating current. A DC/AC converter that drives an AC motor to move the elevator up and down, and an emergency operation control means that controls the DC/AC converter and operates to a predetermined designated floor where evacuation can be easily performed. An emergency automatic landing device for an AC elevator, comprising: a landing means for detecting arrival at the designated floor, landing the elevator car on the floor, and opening the door.