JP2022154053A - elevator control system - Google Patents

Abstract

To enable the use of a small-capacity auxiliary power supply which is required in the event of power failure or other abnormalities in an elevator that includes a plurality of cars within a single transport section (multi-deck elevator).SOLUTION: A control system comprises: a first control unit that controls a first drive device that raises and lowers a transport unit; a second control unit that controls a second drive device for operating at least one car in the transport unit; an abnormality detection unit that detects abnormalities in power supplied from an external power supply; and an auxiliary power supply to be used when such abnormality is detected by the abnormality detection unit. When the abnormality detection unit detects an abnormality, the first control unit generates regenerative power to the first drive device by dropping the transport unit and a balancing weight in a heavier direction, and the second control unit controls the second drive device using the regenerative power generated by the first drive device, and suppresses power consumption of the auxiliary power supply with this control.SELECTED DRAWING: Figure 2

Description

The present invention relates to control technology for an elevator equipped with an auxiliary power supply that is used when an abnormality such as a power failure occurs.

Conventional single-deck elevators are equipped with an auxiliary power supply to store the necessary power so that passengers in the car can be evacuated even in the event of a power outage or other abnormality. There are many things.

In recent years, in order to increase transportation capacity, a double-deck elevator has been proposed in which a transportation section including two cars is moved up and down in one hoistway. Also in such a double-deck elevator, it has been proposed to provide an auxiliary power supply for storing electric power required when an abnormality such as a power failure occurs (see, for example, Patent Document 1). .

JP-A-2002-87716

In the above-described double-deck elevator, the distance between two vertically adjacent floors is not necessarily the same for any combination of the two floors. Therefore, the transport unit has a position adjustment mechanism for enabling position adjustment of the cars so that the two cars can land at the same time regardless of the combination of the two floors that are vertically adjacent to each other. A device is provided.

Therefore, the double-deck elevator requires electric power for adjusting the position of the car in addition to the electric power for raising and lowering the transport section and opening and closing the car door. In addition, even if an abnormality such as a power failure occurs, it is necessary for the car to land on the nearest floor in order to evacuate the user safely, and electric power is required for this purpose. If all the power required in the event of an abnormality such as a power outage is to be covered solely by the power of the auxiliary power supply, the auxiliary power supply must be able to store all of the power. Therefore, in order to secure the necessary power in the event of a power outage or other abnormality, the total capacity of the auxiliary power supply must be reduced by increasing the capacity of the auxiliary power supply or installing a separate auxiliary power supply. There was no choice but to increase the size (see, for example, Patent Document 1).

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to use a small-capacity auxiliary power supply for an elevator (multi-deck type elevator) that includes a plurality of cars in one transport unit as an auxiliary power supply that is required when an abnormality such as a power failure occurs. is to make it possible.

The control system according to the present invention can be applied to the following elevators. The elevator includes a conveying section including a plurality of cars, a first driving device for raising and lowering the conveying section, a second driving device for operating at least one car in the conveying section, and a first a counterweight suspended from the drive. The control system includes a first control unit that controls the first drive device, a second control unit that controls the second drive device, an abnormality detection unit that detects an abnormality in the power supplied from the external power source, and the abnormality detection unit. and an auxiliary power supply that is used when the unit detects an abnormality. Then, when the abnormality detection unit detects an abnormality, the first control unit causes the first driving device to generate regenerative power by dropping the conveying unit and the counterweight in the heavier direction, and the second control unit: The regenerative electric power generated by the first driving device is used to control the second driving device, and these controls suppress the power consumption of the auxiliary power supply.

According to the above control system, even if an abnormality (such as a power outage) occurs in the power supplied from the external power supply and power supply from the auxiliary power supply becomes necessary, the transport section and the counterweight can be controlled by their weights. By using the difference to drop the heavy object, it is possible to move the transport unit to the nearest floor while suppressing power consumption of the auxiliary power supply. Further, even when the second driving device needs to be controlled by power running, the power consumption of the auxiliary power supply can be suppressed by controlling the second driving device using the regenerated electric power generated by the first driving device. . As described above, according to the above control system, even when an abnormality such as a power failure occurs and power supply from the auxiliary power supply becomes necessary, the power consumption of the auxiliary power supply can be significantly suppressed.

The control system described above may be applied to an elevator further comprising a braking device for blocking rotation of the first drive. In such a configuration, when the abnormality detection section detects an abnormality, the first control section releases the braking device using the electric power of the auxiliary power supply, thereby dropping the conveying section and the counterweight to the heavier side. and thereby cause the first driving device to generate regenerative power. According to this configuration, in order to drop the conveying unit and the counterweight to the heavier side in the event of an abnormality such as a power failure, electric power is required to open the brake device. Since the transport section can be moved to the nearest floor using the weight difference, power consumption is significantly suppressed compared to the case where the transport section is moved to the nearest floor by power running control.

In the above control system, the second drive device may be a position adjustment device that enables position adjustment of at least one car within the transport section. In this configuration, when the abnormality detection section detects an abnormality, the second control section controls the position adjustment device using the regenerated electric power generated by the first drive device, thereby allowing the entire car to land on the floor. You can move it to a position. Here, when the second driving device is a position adjusting device, it may be necessary to control the second driving device by power running. Even when it is necessary to control the second driving device by power running, according to the above configuration, the second driving device can be controlled using the regenerated electric power generated by the first driving device. All the cars can be landed on the nearest floor while suppressing power consumption of the auxiliary power supply.

In the above control system, when the abnormality detection section detects an abnormality, the first control section may charge the auxiliary power supply using the regenerated electric power generated by the first driving device. Then, the second control unit may control the second driving device using the power of the auxiliary power supply charged by the regenerated power. According to this configuration, the regenerated electric power generated by the first driving device can be temporarily stored in the auxiliary power supply. Therefore, even after the transport unit stops at the nearest floor and regenerative power is no longer generated, the power of the auxiliary power supply can be used to control the second driving device. Therefore, the regenerated electric power generated by the first driving device can be effectively used.

Further, the second control unit uses part of the regenerated power generated by the first drive device to operate the second drive device even during a period in which the auxiliary power supply is being charged by the regenerated power generated by the first drive device. may be controlled. According to this configuration, even if a part of the regenerated power remains unusable for charging the auxiliary power supply because the regenerated power is generated beyond the free capacity of the auxiliary power supply, it is transferred to the second driving device. Effective use for control becomes possible. Therefore, as a means of effectively using the remaining regenerative power, it is necessary to adopt a means of increasing the capacity of the auxiliary power supply so that all the regenerative power can be charged (that is, means of increasing the size of the auxiliary power supply). Gone.

According to the present invention, in an elevator (multi-deck type elevator) including a plurality of cars in one conveying unit, an auxiliary power supply with a small capacity is used as an auxiliary power supply required when an abnormality such as a power failure occurs. becomes possible.

1 is a conceptual diagram showing the configuration of a double-deck elevator; FIG. 1 is a conceptual diagram showing the configuration of a control system according to an embodiment; FIG.

[1] Embodiment As an embodiment, a control system applicable to a double-deck elevator will be described. First, the configuration of the double-deck elevator will be described.

[1-1] Configuration of Elevator FIG. 1 is a conceptual diagram showing the configuration of a double-deck elevator. As shown in FIG. 1 , the double-deck elevator includes a transport section 1 , a drive mechanism 2 and a control section 3 . The configuration of each unit will be specifically described below.

<Conveyor>
The transport section 1 includes an outer car 10 (car frame or the like) that moves in the hoistway, and two cars 11A and 11B that are vertically arranged in the outer car 10 .

<Drive Mechanism>
The drive mechanism 2 includes a first drive device 21 for raising and lowering the transport section 1 within the hoistway, a second drive device 22 for operating at least one of the cars 11A and 11B within the transport section 1, a transport a counterweight 23 suspended on the first drive 21 with the part 1 .

In this embodiment, the first driving device 21 is configured by an electric motor 211 , a sheave 212 rotated by the power of the electric motor 211 , and a main rope 213 hung on the sheave 212 . In addition, the transport section 1 and the counterweight 23 are suspended on both sides of the sheave 212 by the main ropes 213 . According to such a first driving device 21 , by rotating the sheave 212 with the power of the electric motor 211 , it is possible to raise and lower the conveying section 1 within the hoistway. A relatively high-output motor is used as the electric motor 211 so as to appropriately output the torque required when the conveying unit 1 is moved up and down by power running control.

In a double-deck elevator, the distance between two vertically adjacent floors is not necessarily the same for any combination of the two floors. Therefore, in this embodiment, a position adjusting device 12 that enables position adjustment of at least one of the cars 11A and 11B in the outer car 10 is provided in the conveying section 1 as the second driving device 22. . According to such a second driving device 22, regardless of the combination of two vertically adjacent floors, the positions of the cars 11A and 11B are adjusted immediately before or after the transport section 1 stops. , the cars 11A and 11B can be landed at the same time.

In the example of FIG. 1, the position adjusting device 12 is configured by suspending the cars 11A and 11B by hanging a wire rope 122 on a drive pulley 121 provided on the ceiling of the outer car 10 (traction type). In this case, by rotating the drive pulley 121, the two cars 11A and 11B can be moved in opposite directions by the same distance. The position adjusting device 12 is not limited to the traction type, but may be composed of a ball screw, a pantograph, or the like, as long as the position adjusting device 12 is capable of adjusting the position of at least one of the cars 11A and 11B. may be changed as appropriate.

In such a configuration, the drive mechanism 2 further includes a brake device 24 that blocks rotation of the first drive device 21 . Specifically, the brake device 24 is a device that stops the shaft rotation of the electric motor 211 and sheave 212 of the first drive device 21 . Such a brake device 24 is used to prevent displacement of the transport section 1 when the cars 11A and 11B land on two vertically adjacent floors. The brake device 24 is also used to prevent the conveying unit 1 from falling when the elevator is stopped in an emergency due to a power failure or the like.

<Control part>
The controller 3 includes a first controller 31 that controls the first drive device 21 and a second controller 32 that controls the second drive device 22 . The first control unit 31 and the second control unit 32 are parts configured by a processing device such as a CPU. It may be configured by hardware. The elevator may further include a storage unit (a portion composed of memory such as ROM and RAM; not shown) for storing various information necessary for control by the control unit 3 .

[1-2] Configuration of Control System FIG. 2 is a conceptual diagram showing the configuration of the control system according to this embodiment. As shown in FIG. 2, in the control system, the first control unit 31 and the second control unit 32 are electrically connected to each other by a wire Lx. Power is supplied to the first control unit 31 and the second control unit 32 through Lx. In such a configuration, the control system further includes an auxiliary power supply 4, an abnormality detector 5, and switches 6A and 6B. The configuration of each unit will be specifically described below.

The control processing executed by the abnormality detection unit 5, the first control unit 31, and the second control unit 32, which will be described below, may be realized by software by causing a processing device (such as a CPU) to execute a program. Alternatively, it may be implemented in hardware by constructing a circuit.

<Auxiliary power supply>
The auxiliary power supply 4 is a power supply used when an abnormality (power failure, etc.) occurs in the power supplied from the external power supply 100 to the wire Lx. As an example, the auxiliary power supply 4 is composed of a rechargeable storage battery.

<Abnormality detector and switch>
The abnormality detection unit 5 detects an abnormality (power failure, etc.) in the power supplied from the external power supply 100 to the wire Lx. Specifically, when the input voltage Vx from the external power supply 100 to the wire Lx becomes lower than the predetermined voltage V0, the abnormality detection unit 5 detects it as an abnormality. As an example, the predetermined voltage V0 is the lower limit of the voltage required to normally control the elevator.

The switch 6A is provided between the external power supply 100 and the wire Lx, and the switch 6B is provided between the auxiliary power supply 4 and the wire Lx.

When detecting an abnormality, the abnormality detection section 5 transmits an abnormality signal Sp to the first control section 31 and the second control section 32, and opens the switch 6A so that the external power supply 100 and the external power supply 100 The electric line Lx is electrically cut off, while the auxiliary power supply 4 and the electric line Lx are electrically connected by closing the switch 6B. As a result, even if an abnormality such as a power failure occurs, power from the auxiliary power supply 4 is supplied to the first control unit 31 and the second control unit 32 instead of the external power supply 100 . Therefore, it is possible to avoid a situation in which the first control unit 31 and the second control unit 32 completely stop due to power shortage.

On the other hand, when the abnormality detection unit 5 no longer detects an abnormality, it transmits a normal signal Sq to inform the first control unit 31 and the second control unit 32, and closes the switch 6A. to electrically connect the external power source 100 and the wire Lx, while opening the switch 6B electrically disconnects the auxiliary power source 4 and the wire Lx. As a result, power from the auxiliary power supply 4 is cut off, while power from the external power supply 100 restored to normal is supplied to the first control unit 31 and the second control unit 32 .

<First Control Unit and Second Control Unit>
When the first control unit 31 receives the abnormality signal Sp from the abnormality detection unit 5, the first control unit 31 causes the transport unit 1 and the counterweight 23 to drop to the heavier side by utilizing the weight difference between them. 21 is caused to function as a generator to cause the first driving device 21 to generate regenerative electric power Wr.

In this embodiment, when an abnormality such as a power failure occurs, the elevator is brought to an emergency stop, and the rotation of the first driving device 21 is stopped by the braking device 24 . Therefore, when receiving the abnormality signal Sp from the abnormality detection section 5, the first control section 31 opens the brake device 24 using the electric power of the auxiliary power supply 4, thereby allowing the first driving device 21 to rotate freely. make it possible. As a result, the first control unit 31 causes the conveying unit 1 and the counterweight 23 to drop in the heavier direction, thereby allowing the first driving device 21 to generate the regenerative electric power Wr. When dropping the conveying unit 1 and the counterweight 23 in the heavier direction, the first control unit 31 uses the electric power of the auxiliary power supply 4 to control the first driving unit 21 so as to keep their speeds constant. Torque may be generated. Also, the first control unit 31 can use the electric power of the auxiliary power supply 4 when stopping the conveying unit 1 at the nearest floor and then operating the brake device 24 .

In this embodiment, the first controller 31 directly supplies the regenerated electric power Wr generated by the first drive device 21 to the second controller 32 through the electric wire Lx. Here, since the electric motor 211 of the first driving device 21 uses a relatively high-output motor as described above, when it functions as a generator, it generates relatively large regenerative electric power Wr. be able to. Since the load of the second driving device 22 controlled by the second control unit 32 is sufficiently smaller than that of the first driving device 21, when the first driving device 21 functions as a generator, the second driving device 22 It is possible to cause the first driving device 21 to generate the regenerative electric power Wr sufficient to cover the electric power required for controlling the driving device 22 . Therefore, even if the first control unit 31 directly supplies the regenerated power Wr to the second control unit 32, the second control unit 32 uses the regenerated power Wr directly supplied from the first control unit 31 to perform the second control. The drive 22 can be controlled.

Therefore, in the present embodiment, the second control unit 32 controls the second driving device 22 using the regenerated electric power Wr generated in the first driving device 21 when receiving the abnormality signal Sp from the abnormality detection unit 5 . Specifically, the second control unit 32 uses the regenerated electric power Wr directly supplied from the first control unit 31 to control the position adjustment device 12, which is the second driving device 22, thereby performing the first control. All of the cars 11A and 11B are moved to the landing position before the unit 31 stops the transport unit 1 at the nearest floor.

On the other hand, when receiving the normal signal Sq from the abnormality detection unit 5 , the first control unit 31 and the second control unit 32 execute normal control processing using power from the external power supply 100 .

According to the above control system, even if the power supply from the auxiliary power supply 4 becomes necessary due to an abnormality (such as a power failure) in the power supplied from the external power supply 100, the transfer unit 1 and the counterweight 23 can be operated. , and drop them in the heavier direction by utilizing the weight difference between them, so that the power consumption of the auxiliary power supply 4 can be suppressed while the transport unit 1 can be moved to the nearest floor. In this embodiment, electric power is required to open the brake device 24 in order to drop the conveying unit 1 and the counterweight 23 in the heavier direction in the event of an abnormality such as a power failure. can be released, the weight difference can be used to move the transport unit 1 to the nearest floor, so power consumption is significantly reduced compared to the case of moving the transport unit 1 to the nearest floor by power running control.

Further, in this embodiment, when the cars 11A and 11B are caused to land on the floor by position adjustment by the position adjustment device 12, which is the second driving device 22, the position adjustment device 12 may need to be controlled by power running. For example, when the position adjustment device 12 is of a traction type (see FIG. 1), and the positions are adjusted by moving the cars 11A and 11B to the lighter side, the drive pulley 121 is rotated by power running control. There is a need. Even when the position adjusting device 12 needs to be controlled by power running in this manner, the above control system can control the position adjusting device 12 using the regenerative electric power Wr generated by the first driving device 21. , all the cars 11A and 11B can land on the nearest floor while suppressing the power consumption of the auxiliary power supply 4.

As described above, according to the control system of the present embodiment, even when an abnormality such as a power failure occurs and power supply from the auxiliary power supply 4 becomes necessary, the power consumption of the auxiliary power supply 4 can be significantly suppressed. can be done. In other words, if the auxiliary power supply 4 stores at least the electric power required until the regenerative electric power Wr is generated by the first driving device 21 in the initial stage when an abnormality such as a power failure occurs, the regenerative electric power Wr can be regenerated. Since the power Wr can be reliably generated and control can be performed using the regenerated power Wr, the user can be evacuated safely. Therefore, even in an elevator such as a double-deck elevator that consumes a large amount of electric power, it is possible to use a small-capacity auxiliary power supply 4 .

[2] Modification [2-1] First Modification In the above-described control system, the first control unit 31 directly supplies the regenerated electric power Wr generated by the first driving device 21 to the second control unit 32. Alternatively, the regenerated electric power Wr may be used to charge the auxiliary power supply 4 . That is, the first control unit 31 may temporarily store the regenerated electric power Wr generated by the first driving device 21 in the auxiliary power supply 4 . Then, the second control unit 32 may control the second driving device 22 using the power of the auxiliary power supply 4 charged with the regenerated power Wr.

According to this configuration, by temporarily storing the regenerative power Wr generated by the first driving device 21 in the auxiliary power supply 4, after the transport unit 1 stops at the nearest floor and the regenerative power Wr is no longer generated, Even if there is, the power of the auxiliary power supply 4 can be used to control the second driving device 22 . Specifically, even after the first control unit 31 stops the transport unit 1 at the nearest floor, the second control unit 32 causes the position adjustment device 12 that is the second driving device 22 to , all of the cars 11A and 11B can be moved to the landing position. Therefore, the regenerated electric power Wr generated by the first driving device 21 can be effectively used.

Further, the second control unit 32 uses part of the regenerated electric power Wr generated by the first driving device 21 even during the period when the auxiliary power supply 4 is being charged by the regenerated electric power Wr generated by the first driving device 21. may be used to control the second drive device 22 .

According to this configuration, even if a portion of the regenerated power Wr remains unusable for charging the auxiliary power supply 4 due to the generation of the regenerated power Wr exceeding the free capacity of the auxiliary power supply 4, it is transferred to the second power supply. It becomes possible to effectively use it for the control of the two-drive device 22 . Therefore, as means for effectively using the remaining regenerative power Wr, means for increasing the capacity of the auxiliary power supply 4 so that all the regenerative power Wr can be charged (that is, means for increasing the size of the auxiliary power supply 4). no longer need to be hired.

[2-2] Second Modification In the control system described above, the second control unit 32 uses a door opening/closing device (not shown) for opening and closing the car doors of the cars 11A and 11B as the second driving device 22, The door opening/closing device may be controlled using the regenerated power Wr generated by the first driving device 21 (specifically, the power of the auxiliary power supply 4 charged with the regenerated power Wr). It should be noted that the second control unit 32 operates not only the position adjustment device 12 and the door opening/closing device, but also various devices that operate at least one of the cars 11A and 11B in the transport unit 1 as the second driving device 22. Alternatively, at least one of these devices may be controlled using the regenerated power Wr generated by the first driving device 21 (including the power of the auxiliary power supply 4 charged with the regenerated power Wr).

[2-3] Other Modifications The control system described above can be applied not only to a double-deck elevator but also to a multi-deck elevator in which a plurality of cars are included in the transport section 1.

In addition, the control system described above causes the first driving device 21 to generate regenerative electric power Wr not only when an abnormality such as a power failure occurs, but also in normal times, and uses it to control the second driving device 22. good too.

The above descriptions of the embodiments and modifications should be considered illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than by the embodiments or variations described above. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and range of equivalents of the claims.

Further, from the above-described embodiments and modifications, the subject matter of the invention is not limited to the elevator control system, but may be individually extracted from devices, control processes, programs, etc. that constitute the elevator control system, or part of them. may be partially extracted.

Reference Signs List 1 Conveyor 2 Drive mechanism 3 Control unit 4 Auxiliary power source 5 Abnormality detection unit 6A, 6B Switch 10 Outer car 11A, 11B Car 12 Position adjustment device 21 First drive device 22 Second drive device 23 Counterweight 24 Brake device 31 First control unit 32 Second control unit Lx Electric wire Sp Abnormal signal Sq Normal signal Vx Input voltage V0 Predetermined voltage Wr Regenerative power 100 External power supply 121 Drive pulley 122 Wire rope 211 Electric motor 212 Sheave 213 Main rope

Claims (5)

a transport unit including a plurality of cars; a first driving device for raising and lowering the transport unit; a second driving device for operating at least one of the plurality of cars in the transport unit; a control system applicable to an elevator comprising a transport section and a counterweight suspended on said first drive,
a first control unit that controls the first driving device;
a second control unit that controls the second driving device;
an anomaly detection unit that detects an anomaly in power supplied from an external power supply;
an auxiliary power supply used when the abnormality detection unit detects the abnormality;
with
When the abnormality detection unit detects the abnormality,
The first control unit causes the first driving device to generate regenerative electric power by dropping the conveying unit and the counterweight in a heavier direction,
The second control unit controls the second drive device using the regenerated electric power generated by the first drive device,
A control system for an elevator that suppresses power consumption of the auxiliary power supply by these controls. A control system applicable to an elevator further comprising a braking device for stopping rotation of the first drive device,
When the abnormality detection section detects the abnormality, the first control section releases the braking device using the electric power of the auxiliary power supply, thereby moving the conveying section and the counterweight to the heavier side. 2. The elevator control system of claim 1, causing the elevator to fall thereby causing the first drive to generate the regenerative power. The second drive device is a position adjustment device that enables position adjustment of at least one of the plurality of cars in the transport unit,
When the abnormality detection section detects the abnormality, the second control section controls the position adjustment device using the regenerative electric power generated by the first drive device so that all of the cars are 3. The elevator control system according to claim 1 or 2, which moves the to the landing position. When the abnormality detection unit detects the abnormality,
The first control unit charges the auxiliary power supply using the regenerated electric power generated by the first driving device,
4. The elevator control system according to any one of claims 1 to 3, wherein said second control unit controls said second driving device using power of said auxiliary power supply charged with said regenerated power. The second control unit uses a part of the regenerative power generated by the first driving device to perform the regenerative power generation even during a period in which the auxiliary power supply is being charged by the regenerative power generated by the first driving device. 5. The elevator control system according to claim 4, for controlling the second drive.

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