JPH07196269A - Operating device for elevator during failure of electric supply - Google Patents

Abstract

PURPOSE:To enable an elevator door to open even when the voltage of a storage battery has lowered in the case of the rescue-operation of an elevator using the storage battery as a power source during the failure of electric supply. CONSTITUTION:In the case of the failure of electric supply of a commercial power source 1, an elevator is rescue-operated by a storage battery 9 in a rescue-operating device 12. When a voltage detection circuit 21 detects the lowering of the voltage of the storage battery 9, a contact 22 is closed to connect a storage battery 23 loaded on a cage 13 to a door control device 14. A door control power source voltage thereby increases to surely close a door 13a for rescuing passengers.

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 using a storage battery during a power failure as a power source.

[0002]

2. Description of the Related Art FIGS.
FIG. 8 is a diagram in which the conventional elevator power failure operation device shown in No. 833 is applied to a winding body type elevator, FIG. 6 is an overall configuration diagram, FIG. 7 is a load current waveform diagram when the door is opened and closed, and FIG. FIG. 9 is a control power supply voltage waveform diagram, and FIG. 9 is a control power supply voltage waveform diagram when the storage battery capacity decreases.

In FIG. 6, (1) is a commercial power source, (2) is a main circuit contact which is closed during normal operation, (3) is a drive circuit which is connected to the main circuit contact (2) and drives an electric motor (4). , (5) is a control power supply contact that is closed during normal operation, (6) is a control power supply device that is connected to the control power supply contact (5) and establishes various control power supplies to the board, relay, etc., (7) is Drive circuit connected to control power supply (6)
(3) is a control circuit for controlling the above devices (2) (3) (5) ~
(7) constitutes the operation control device (8).

Reference numeral (9) is a storage battery for supplying power to the commercial power source (1) at the time of power failure, which is closed at the time of power failure to the drive circuit (3) through the operation main contact (10) at power failure at the time of power failure. It is connected to the control power supply device (6) via a power failure operation control power supply contact (11), and the above devices (9) to (11) constitute a power failure rescue operation device (12).

(13) is an elevator car, (14) is a car (1
A door control device for controlling the opening and closing of the door (13a) provided in 3) is connected to the control circuit (7) and the control power supply device (6) via moving cables (15) and (16), respectively. (17) is a main rope, one end of which is wound around a winding drum (18) driven by an electric motor (4) and the other end of which is connected to a car (13). (19) is a pulley installed above the hoistway and around which the main rope (17) is wound.

The conventional elevator power failure operation device is configured as described above, and the contacts (2) and (5) are closed during normal operation, and the drive circuit (3) and the control power supply device (6) are supplied with commercial power. (1) is supplied. The control circuit (7) operates by the control power supply supplied from the control power supply device (6) to control the drive circuit (3).
Now, the electric motor (4) is driven, the winding drum (18) rotates, and the main rope
By winding (17) and rewinding the basket
(13) moves up and down. When the car (13) lands on the floor, the door control device (14) operates and the door (13a) opens and closes.

Next, when the commercial power source (1) fails, a power failure detection device (not shown) detects the power failure, and the contact (5) is opened. Once the contact (5) is opened, it will not close during the rescue operation even if the power failure is restored. Also,
When a power failure is detected, the contact (11) is closed and the storage battery (9) is connected to the control power supply (6). When it is confirmed that the elevator safety device (not shown) is not operating, if the car (13) is stopped between floors, the contact (10)
Is closed, power is supplied to the drive circuit (3) to drive the electric motor (4), and the car (13) is moved to the nearest floor.

Generally, in a rescue operation in a winding-cylinder elevator, the car (13) is driven in the descending direction, so that the electric motor (4) does not require electric power except for starting and stopping. Will be done. At this time, the contact (2) is mechanically interlocked so that it cannot be closed when the contact (10) is closed.

When the car (13) has landed on the nearest floor, the door control device (14) opens the car according to a command from the control circuit (7).
Rescue passengers in (13). Here, the door control device (14) is supplied with power from the control power supply device (6) to open and close the door (13a).

7 to 9 show current and voltage when the door is opened and closed. FIG. 7 is a current waveform consumed by the door control device (14), where A is a region when the door is being pushed, B is a door being moved, C is a door that is being pushed, and D is a door being moved. Area. Current I in areas A and C when door is pressed and when door is pressed
₁ flows, current I ₂ flows in regions B and D during door opening movement and door closing movement, and there is a relation of I ₂ > I ₁ .

From the relationship between the load currents I ₁ and I ₂ ,
The door control power supply voltage also fluctuates as shown in FIG. That is, the voltage V is applied in the areas A and C when the door is closed and pressed.
_It becomes ₁ and falls to the voltage V ₂ in the areas B and D during the door open movement and the door close movement. Here, ΔV ₁ is the line voltage drop from the storage battery (9) to the door control device (14), and V ₁ + ΔV ₁ corresponds to the voltage of the storage battery (9). Incidentally, V ₃ denotes the minimum value of the door open possible voltage.

FIG. 9 shows that the door control power supply voltage V ₂ 'can be opened during the end of life of the storage battery (9) or when the storage battery (9) voltage drops for some reason, during door opening movement and door closing movement. The case where the voltage is lower than the minimum voltage V ₃ is shown. In such a case, the door cannot be opened and the passenger is trapped in the car (13).

[0013]

In the elevator power failure operation device as described above, since the electric power is supplied to the electric motor (4) and the door control device (14) by using the storage battery (9) at the time of power failure as a power source, The load current also increases the voltage drop of the storage battery (9). Further, depending on the condition of the building, the distance from the storage battery (9) to the door control device (14) becomes long and the line voltage drop becomes large. For example, as shown in FIG. 9, the door control power supply voltage V
Despite ₂ 'drops below the door-open lowest possible voltage V _3, there is a problem that becomes impossible door open operation would confine the passengers in the cage (13).

In order to prevent this, it is necessary to replace the storage battery (9) regularly, but the ambient temperature of the storage battery (9),
Since the number of discharges and the depth of discharge differ depending on each elevator, it is necessary to take measures such as shortening the replacement cycle and increasing the capacity of the storage battery (9), which makes the cost expensive. There is a problem.

The present invention has been made in order to solve the above-mentioned problems, so that even if the voltage of the storage battery drops, the door can be reliably opened and the passengers can be rescued without being confined in the car. It is an object of the present invention to provide a device for operating an elevator during a power failure.

[0016]

According to a first aspect of the present invention, there is provided an elevator power failure operating device in which a second storage battery is mounted in a car and a second control power supply circuit of a door power failure rescue door control device is provided. It is provided with a connection circuit for connecting the storage battery of.

Further, an elevator power failure operating device according to a second aspect of the present invention includes a second storage battery mounted in a car, and a voltage detection circuit which operates when the voltage of the first storage battery decreases.
A control circuit for connecting the second storage battery to the control power supply circuit of the door control device when the voltage detection circuit during a power failure rescue operation operates is provided.

The elevator power failure operating device according to the third aspect of the invention is provided with a slow door opening command circuit for issuing a command to slow down the door opening speed of the car door during a power failure rescue operation.

Further, the elevator power failure operating device according to the fourth aspect of the invention is provided with a door half-open command circuit for issuing a command to stop the door opening operation of the car door during a power failure rescue operation.

Further, an elevator power failure operation device according to a fifth aspect of the present invention is the elevator according to the fourth aspect of the present invention, which is provided with a broadcasting device that broadcasts a prohibition on boarding a car when the door half-open command circuit operates. is there.

[0021]

In the first invention of this invention, the second
Since the storage battery of is installed and is connected to the door control device at the time of power failure, the door control power supply voltage rises.

Further, in the second invention, the second car
When the voltage of the first storage battery drops during a power failure, the second storage battery is connected to the door control device, so that the door control power supply voltage rises and the second storage battery is installed.
The number of discharges of the storage battery is reduced.

Further, in the third aspect of the invention, since the door opening speed is set to be slow during the power failure rescue operation, the load current of the door motor is reduced as compared with the normal time.

Further, in the fourth aspect of the invention, the door opening operation is stopped halfway during the power outage rescue operation, and in the fifth aspect of the invention, the entry prohibition is further broadcast, so the door is half opened. Only one person can leave the car. It is also prohibited to board the car.

[0025]

【Example】

Example 1. 1 and 2 are views showing an embodiment of the first and second inventions of the present invention, FIG. 1 is an overall configuration diagram, and FIG. 2 is a control power supply voltage waveform diagram when the storage battery capacity is lowered, Portions similar to those are denoted by the same reference numerals (the same applies to the following embodiments).

In FIG. 1, (21) is a voltage detection circuit for detecting a decrease in the voltage of the storage battery (9), (22) is a contact which is closed when the voltage detection circuit (21) operates, and (23) is A storage battery mounted on the car (13) and connected to the door control device (14).

In the elevator power failure operating device constructed as described above, the contact (5) is opened and the contact (11) is closed as described above. Then, when it is confirmed that the control power source from the storage battery (9) is established and the safety device etc. are not operating, the contact (10) is closed and the drive circuit (3) is operated, and the motor ( 4) is driven and the car (13) stops at the nearest floor and starts the door opening operation.

At this time, the voltage of the storage battery (9) drops,
When the control power supply voltage becomes a voltage V ₂ ′ that is lower than the minimum door openable voltage V ₃ shown in FIG. 2, the door cannot be opened. But the storage battery
When the voltage of (9) drops, the voltage detection circuit (21) outputs, the contact (22) is closed, the storage battery (23) is connected in series with the storage battery (9), and the door control device (14) because it is connected to the control power supply voltage V ₂ '+ V ₄ rises the voltage V ₄ minutes battery (9)
Therefore, V ₃ <(V ₂ '+ V ₄ ) is established and the door can be opened. This makes it possible to rescue the passengers in the car (13).

In this way, it is detected that the voltage of the storage battery (9) has dropped and the storage battery (23) is connected to the door control device (14). It is possible to prevent the decrease of the capacity and to further improve the reliability. However, even if the contact (22) is closed at the same time as the contact (11) is closed without using the voltage detection circuit (21), the control power supply voltage can be increased and the circuit becomes simple and sufficient. It will be useful. The storage battery (23) can also be used as a power source for a power failure lamp (not shown) in the car (13).

Example 2. 3 and 4 show a third embodiment of the present invention.
FIG. 3 is a diagram showing an embodiment of the invention of FIG.
FIG. 4 is a current and torque characteristic diagram of a door motor. In this embodiment, when the rescue operation device (12) operates, the operation control device
A slow door opening command circuit (not shown) that reduces the rotation speed of the door motor (25), that is, the door opening speed of the door (13a) in response to a command from (8) is provided. As a result, the power consumption of the door control device (14) can be reduced and the door opening operation can be smoothly performed.

FIG. 4 shows the relationship between the current I and torque T of the door motor (25) and the angular frequency ω. Although the door motor current Ia was consumed for the normal door opening operation, the door motor current at that time was Ib by slowing the door opening speed during the rescue operation. It can be reduced. At this time, assuming that the angular frequency is ωa when the door is normally opened, the angular frequency during the rescue operation is ωb, and ωa> ωb.

Example 3. FIG. 5 shows the fourth and fifth aspects of the present invention.
FIG. 3 is a front view of a car showing an embodiment of the invention of FIG. Example 2
Showed that the door opening speed should be slowed during rescue operation.
In the third embodiment, at the same time, only during the rescue operation, the door opening operation circuit (14a) stops the door opening operation by the door motor (25) on the way to half open the door (13a). (Not shown) is provided.

With this, a space for each passenger in the car (13) can be secured, the door motor current can be reduced, and it becomes difficult to get into the car (13) from the outside. Further, if a speaker is provided in the car (13) and broadcasting is performed to prohibit the boarding from the outside, it becomes more useful for emphasizing the boarding prohibition.

[0034]

As described above, according to the first aspect of the present invention, the second storage battery is mounted on the car and is connected to the door control device during a power failure, so that the door control power supply voltage increases. There is an effect that it is possible to prevent the passengers from being opened reliably and trapping passengers in the car.

In the second aspect of the invention, the second storage battery is mounted on the car, and the second storage battery is connected to the door control device when the voltage of the first storage battery drops during a power failure. As the door control power supply voltage rises, the number of discharges of the second storage battery decreases, and it is possible to prevent the capacity from decreasing and further improve the reliability.

Further, in the third aspect of the invention, the door opening speed is set to be slow during the power failure rescue operation, so that the load current of the door motor is reduced as compared with the normal time, and the power consumption can be reduced.

Further, in the fourth invention, the door opening operation is stopped halfway during the power outage rescue operation, and in the fifth invention, the prohibition of boarding is broadcast further, so that the door is half opened and the car is opened. Only one person can get out from the inside, which has the effect of making it difficult to get into the car from the outside. It also has the effect of emphasizing the prohibition on boarding the car.

[Brief description of drawings]

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

2 is a control power supply voltage waveform diagram when the storage battery capacity in FIG. 1 is low.

FIG. 3 is a schematic configuration diagram showing a second embodiment of the present invention.

4 is a current and torque characteristic diagram of the door motor of FIG.

FIG. 5 is a front view of a car showing a third embodiment of the present invention.

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

FIG. 7 is a load current waveform diagram when the door of FIG. 6 is opened and closed.

8 is a control power supply voltage waveform diagram when the door of FIG. 6 is opened and closed.

9 is a control power supply voltage waveform diagram when the storage battery capacity in FIG. 6 is low.

[Explanation of symbols]

 1 Commercial Power Source 4 Electric Motor 6 Control Power Supply Device 9 First Storage Battery 11 Connection Circuit (Contact) 13 Car 13a Car Door 14 Door Control Device 21 Voltage Detection Circuit 22 Connection Circuit (Contact) 23 Second Storage Battery 25 Door Motor

Claims (5)

[Claims] 1. A device for rescue operation of a car by using a first storage battery as a power source for a hoisting electric motor and a door control device during a power failure, wherein a second storage battery is mounted on the car, and the door control device is provided during the power failure rescue operation. A control power supply circuit of the above is provided with a connection circuit for connecting the second storage battery, and an elevator power failure operation device. 2. A device for performing a rescue operation of a car by using the first storage battery as a power source for a hoisting electric motor and a door control device during a power failure, wherein the second storage battery is mounted on the car, and the voltage of the first storage battery decreases. An elevator comprising: a voltage detection circuit that operates when the above operation is performed; and a connection circuit that connects the second storage battery to a control power supply circuit of the door control device when the voltage detection circuit operates during the power outage rescue operation. Power failure operation device. 3. A device for performing a rescue operation of a car using a storage battery during a power failure as a power source, comprising a slow door opening command circuit for issuing a command for slowing the door opening speed of the car during the power failure rescue operation. Elevator power failure operation device. 4. A device for performing a power outage rescue operation of a car by using a storage battery during a power outage, comprising a door half-open command circuit for issuing a command to stop the door opening operation of the car door during the power outage rescue operation. Characteristic elevator power failure operation device. 5. The elevator power failure operating device according to claim 4, further comprising a broadcasting device for broadcasting a prohibition on boarding the car when the door half-open command circuit operates.