JP7537581B1 - Elevator system and method for shutting off elevator drive power supply - Google Patents

Abstract

To provide an elevator mounted on a machine, capable of reliably cutting off power supplied to a drive unit during an emergency or during maintenance and inspection.
[Solution] The elevator system 2 comprises a hoistway X1 through which an elevator car 9 rises and falls, a drive unit 4 installed at the top of the hoistway for raising and lowering the elevator car 9, a commercial power source 15 for supplying power to drive the drive unit 4, a control unit 18 for controlling the raising and lowering of the elevator car 9, a control power cut-off means 25 for cutting off the supply of power from the commercial power source 15 to the control unit 18, short-circuiting units 11, 12, 13 for cutting off the supply of power from the commercial power source 15 to the control unit 18 by the control power cut-off means 25 by short-circuiting, and drive power cut-off means 19 for cutting off the supply of power from the commercial power source 15 to the drive unit 4 by cutting off the supply of power from the commercial power source 15 to the control unit 18 by the control power cut-off means 25.

[Selected figure] Figure 2

Description

The present invention relates to an elevator system that cuts off the power supply to the drive unit during elevator maintenance and inspection, and a method for cutting off the drive power supply to an elevator.

Elevators sometimes do not have a machine room at the top of the hoistway to house the drive unit (machine) and control panel, but rather use machine room-less elevators that house the drive unit and control panel within the hoistway.
In addition, the drive unit and control panel of a machine-room-less elevator may be installed below the hoistway (machine-under-mounted) or above (machine-over-mounted), but in recent years, there has been a desire to install the drive unit and control panel above the hoistway to avoid the drive unit and control panel being submerged and damaged in cases where buildings have been flooded due to heavy rains.
In addition, it is desirable to install the control panel near the drive device in order to shorten the wiring to the drive device.

In the case of machine-mounted installation, the drive unit is installed above (overhead) the top of the elevator car that has landed on the top floor, or in a position that does not overlap with the elevator car in a plan view but overlaps with at least a portion of the elevator car in a front or side view.
In addition, the control panel is installed in a position where the bottom end of the control panel is above the top floor level and does not overlap with the elevator car in a plan view.
In this case, for example, the upper end of the control panel protrudes above the top of the elevator car that has landed on the top floor.

In conventional control panels, when an elevator malfunctioned and stopped and an attempt was made to reset the power supply, the conventional circuit configuration required directly operating a breaker installed in the control panel or a breaker box located near the control panel to reset the power supply.
With conventional machines placed underneath the elevator, if the elevator car was stopped on any floor other than the lowest floor, it was possible to access the control panel and breaker box by opening the lowest floor door and entering the pit.

However, when the machine is placed on top, the control panel can only be accessed by standing on top of the elevator car, meaning that the control panel or breaker box can only be accessed when the elevator car is stopped in a position that allows access from the top floor onto the car, meaning that the restrictions imposed by the elevator car's stopping position are much stricter than when the machine is placed underneath.

If the above situation occurs when the machine is placed on top of the elevator, it is necessary to release the electrical emergency brake and move the elevator car to a position where the control panel and breaker box can be accessed. However, releasing the electrical emergency brake only allows the elevator car to move in the direction of the lowering load (the direction of the heavier of the elevator car and counterweight), so it cannot be said with certainty that the control panel and breaker box can be accessed.

Furthermore, in the case of a control panel mounted on a machine, when performing routine maintenance such as replacing or inspecting parts installed on the top of the control panel, the breaker may be out of reach when the elevator car is moved to the appropriate position to perform maintenance work, and even when a power cut is required for work, it may not be possible to cut the power with the breaker.
This problem occurs because when the elevator car is moved to a position where part replacement work is performed, the breaker overlaps with the elevator car when viewed from the front or side.

The remote control switch 81 that supplies or cuts off power to the control panel 5 using a remote control unit 82 on the elevator car is known from JP 2006-225090 A, but the elevator car is not necessarily stopped in a position where a person can get on top of it.

JP 2006-225090 A

The challenge, therefore, is to provide an elevator mounted on a machine that can reliably cut off the power supplied to the drive unit during emergencies and maintenance inspections.

The elevator system of the present invention includes a hoistway through which an elevator car moves up and down, a drive unit installed at an upper part of the hoistway for raising and lowering the elevator car, a commercial power source which supplies power to drive the drive unit, a control unit which controls the raising and lowering of the elevator car, control power cut-off means which cuts off the supply of power from the commercial power source to the control unit, a short-circuiting unit which cuts off the supply of power from the commercial power source to the control unit by the control power cut-off means, drive power cut-off means which cuts off the supply of power from the commercial power source to the drive unit by cutting off the supply of power from the commercial power source to the control unit by the control power cut-off means , and the control power cut-off means and the drive power cut-off means are electromagnetic contactors, the short-circuiting unit is connected to an automatic voltage regulator which adjusts the voltage of the commercial power source, and an electromagnetic contactor control coil which constitutes the electromagnetic contactor of the control power cut-off means is connected to a connection circuit between the automatic voltage regulator and the short-circuiting unit .

The elevator system according to the present invention further includes a breaker provided on the connection circuit between the drive unit and the commercial power source, an uninterruptible power supply that supplies power to the drive unit and the control unit during a power outage, and an uninterruptible power supply shutdown circuit that outputs a signal to stop the function of the uninterruptible power supply supplying power to the drive unit and the control unit, and the uninterruptible power supply shutdown circuit may not output a signal to stop the function of supplying power when the breaker trips, but may output a signal to stop the function of supplying power when the breaker is turned OFF and when any one of the short-circuiting parts is short-circuited.

The elevator drive power cut-off method of the present invention includes the steps of: cutting off the supply of power from the commercial power source to the control unit by the control power cut-off means which is an electromagnetic contactor by short -circuiting the short-circuiting part, which is connected to an automatic voltage regulator that adjusts the voltage of the commercial power source and has an electromagnetic contactor control coil constituting the electromagnetic contactor of the control power cut-off means connected on a connection circuit between the automatic voltage regulator and the short-circuiting part; cutting off the supply of power from the commercial power source to the control unit by the control power cut-off means shorting the short-circuiting part; and cutting off the supply of power from the commercial power source to the drive unit by the drive power cut-off means which is an electromagnetic contactor by cutting off the supply of power from the commercial power source to the control unit.

The elevator system and elevator drive power cut-off method of the present invention can provide an elevator mounted on a machine that can reliably cut off the power supplied to the drive unit during emergencies and maintenance inspections.

1 is a schematic configuration diagram of an elevator system according to one embodiment of the present invention; 1 is a schematic block diagram of an elevator system according to one embodiment of the present invention; FIG. 2 is a flow chart of a method for cutting off the driving power supply of an elevator according to an embodiment of the present invention.

In each drawing, the dimensions of the components may be enlarged or reduced relative to their actual dimensions, for example, to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. In each drawing, some of the components may be omitted, for example, to facilitate understanding.

Below, an embodiment of an elevator system according to the present invention will be described with reference to Figs. 1 and 2. Also, an embodiment of a method for cutting off the driving power supply of an elevator according to the present invention will be described with reference to Fig. 3. Note that the following embodiment is provided as an example to aid in understanding the configuration of the elevator system and the method for cutting off the driving power supply of an elevator, and is not intended to limit the configuration of the elevator system and the method for cutting off the driving power supply of an elevator.

Figure 1 is a schematic diagram of an elevator system according to one embodiment of the present invention. As shown in Figure 1, the elevator 1 may include, for example, an elevator car 9 for passengers to ride in, a main rope 8 connected to the elevator car 9, a counterweight 5 connected to the main rope 8, a drive unit 4 that drives the main rope 8 to move the elevator car 9 and the counterweight 5 in the vertical direction D3, and a control panel 3 that controls each part of the elevator 1. In addition, a buffer 6 may be provided as a safety device at the bottom of the elevator shaft X1 below the elevator car 9 and the counterweight 5.

In each figure, the first direction D1 is the first horizontal direction D1, which is parallel to the horizontal direction, the second direction D2 is the second horizontal direction D2, which is parallel to the horizontal direction and perpendicular to the first horizontal direction D1, and the third direction D3 is the vertical direction perpendicular to the first horizontal direction D1 and the second horizontal direction D2, which is the up-down direction D3. Note that, for example, the direction in which people get on and off the elevator car 9 may be the first horizontal direction D1.

The drive unit 4 is driven by a motor 14. The main rope 8 driven by the drive unit 4 has one end fixed to a part near the top of the hoistway X1, passes through a car sheave 10 provided on the elevator car 9, is wound around a drive sheave (not shown) of the drive unit 4, and passes through a counterweight sheave 7 provided on the counterweight 5, and is again fixed at the other end to a part near the top of the hoistway X1. Note that in this embodiment, the drive unit 4 is driven by a motor 14, but the driving means is not limited to the motor 14. For example, the driving means may be a linear drive system or a hydraulic drive system.

In the present invention, as in this embodiment, the drive unit 4 is disposed inside the elevator shaft X1 and above the top floor landing. Specifically, it is disposed near the top of the elevator shaft X1.

As shown in FIG. 1, for example, multiple landings are provided. In this embodiment, at least a top floor landing NT and a bottom floor landing NL are provided, and one or more landings are provided between the top floor landing NT and the bottom floor landing NL depending on the building.

Figure 2 is a schematic block diagram of an elevator system 2 according to one embodiment of the present invention. The elevator system 2 according to the present invention is composed of circuits in a control panel 3. The elevator system 2 controls the power supply from a commercial power source 15 to the motor 14 so as to cut off the power supplied to the drive unit 4 (motor 14) during an emergency or during maintenance and inspection.

The elevator system 2 is connected to a commercial power source 15 and includes a control unit 18 that controls the elevation and descent of the elevator car 9, a motor 14, an inverter 16, and an uninterruptible power supply (UPS) 17. Power from the commercial power source 15 may be supplied to the motor 14 via the inverter 16, and to the control unit 18 via the uninterruptible power supply 17. The uninterruptible power supply 17 also stores power via a battery connection unit 28, and temporarily supplies power to the inverter 16 and the control unit 18 in the event of a power outage in the commercial power source 15, causing the elevator car 9 to land at the nearest floor.

The elevator system 2, which is one embodiment of the present invention, includes a power supply cutoff unit 27. The power supply cutoff unit 27 is the part surrounded by a dashed line in FIG. 2. The power supply cutoff unit 27 may include an automatic voltage regulator 24 that adjusts the voltage of the power from the commercial power supply 15, which is connected to the commercial power supply 15. The automatic voltage regulator 24 may be connected to the short-circuiting parts 11, 12, and 13, which are open circuits, and one connection circuit of each short-circuiting part may be connected together to the electromagnetic contactor control coil 26A. Although three short-circuiting parts are provided in this embodiment, one, two, or four or more short-circuiting parts may be provided. The voltage of the power adjusted by the automatic voltage regulator 24 may be 48V or less, and preferably 24V.

As shown in FIG. 1, the short circuit unit 11 may be provided, for example, at the upper end of the control panel 3. The short circuit unit 12 may be provided, for example, on the hoistway side of the landing door on the top floor NT and below the landing door threshold. The short circuit unit 13 may be provided, for example, on the hoistway side of the landing door on the bottom floor NL and below the landing door threshold. The installation positions of the short circuit unit 12 and the short circuit unit 13 may be positions that can be accessed when an operator opens the landing door. The short circuit units 11, 12, and 13 may be connectors, for example, and may be shorted by jumper pins.

The automatic voltage regulator 24 may also be connected to an independent closed circuit, and the closed circuit may include an electromagnetic contactor contact 26B that opens and closes in response to the operation of the electromagnetic contactor control coil 26A, and an electromagnetic contactor control coil 25A that are connected in series. The electromagnetic contactor contact 26B is normally closed, and may be opened by passing current through the electromagnetic contactor control coil 26A.

An electromagnetic contactor contact 25B may be provided on the connection circuit between the commercial power source 15 and the uninterruptible power supply 17. The electromagnetic contactor contact 25B is normally closed, and may be opened when the power supply to the electromagnetic contactor control coil 25A is cut off. This cuts off the supply of power from the commercial power source 15 to the uninterruptible power supply 17, and further cuts off the supply of power to the control unit 18 that was being supplied via the uninterruptible power supply 17.

Electromagnetic contactor contacts 19B may be provided between the commercial power supply 15 and the inverter 16, and electromagnetic contactor contacts 20B may be provided between the uninterruptible power supply 17 and the inverter 16. Also, an electromagnetic contactor control coil 19A may be provided, which is connected to the control unit 18 and energized when power is supplied to the control unit 18 and whose power supply is cut off when the power to the control unit 18 is cut off, and an electromagnetic contactor control coil 20A may be provided, which is connected to the control unit 18 and de-energized under the control of the control unit 18 when power is supplied to the control unit 18 and energized under the control of the control unit 18 that receives power from the uninterruptible power supply 17 when the power to the control unit 18 is cut off.

The electromagnetic contactor contact 19B is normally closed, and may be opened by cutting off the power supply to the electromagnetic contactor control coil 19A. The electromagnetic contactor contact 20B is normally open, and may be closed by energizing the electromagnetic contactor control coil 20A. When the commercial power supply 15 is lost due to a power outage or other power supply abnormality, the control unit 18, which receives power from the uninterruptible power supply 17, controls the electromagnetic contactor control coil 20A to energize and close the electromagnetic contactor contact 20B, thereby supplying the power stored by the uninterruptible power supply 17 to the inverter 16 and landing the elevator car 9 at the nearest floor.

On the other hand, when short-circuited by the short-circuiting parts 11, 12, and 13, the electromagnetic contactor contact 25B opens as described above, cutting off the power supply to the control part 18, and the power supply from the uninterruptible power supply 17 to the control part 18 is cut off by the uninterruptible power supply shutdown circuit 29 described later, cutting off the power supply to the electromagnetic contactor control coil 19A, and cutting off the control power supply of the control part 18. Therefore, the electromagnetic contactor control coil 20A is not energized by the control of the control part 18, and the electromagnetic contactor control coil 20A maintains a state in which the power supply is cut off. As a result, the electromagnetic contactor contact 19B opens, and the electromagnetic contactor contact 20B maintains an open state. Therefore, when short-circuited by the short-circuiting parts 11, 12, and 13, neither the power from the commercial power supply 15 nor the power from the uninterruptible power supply 17 is supplied to the inverter 16 and the motor 14.

As a result, the electromagnetic contactor contact 19B functions as a drive power supply cutoff means, and the electromagnetic contactor contact 25B functions as a control power supply cutoff means.

In this embodiment, the electromagnetic contactor 19 including the electromagnetic contactor control coil 19A and the electromagnetic contactor contact 19B, the electromagnetic contactor 20 including the electromagnetic contactor control coil 20A and the electromagnetic contactor contact 20B, and the electromagnetic contactor 25 including the electromagnetic contactor control coil 25A and the electromagnetic contactor contact 25B may be contactors. Also, in this embodiment, the electromagnetic contactor 26 including the electromagnetic contactor control coil 26A and the electromagnetic contactor contact 26B may be a relay. The electromagnetic contactors 19, 20, and 25 are preferably contactors because a large current flows through them, whereas the electromagnetic contactor 26 does not pass a large current through it, so by making it a relay, a circuit can be formed using a small and inexpensive device.

In this embodiment, in order to prevent damage to each device in the event of an overcurrent, a breaker 21 may be provided between the commercial power source 15 and the inverter 16, a breaker 22 may be provided between the commercial power source 15 and the automatic voltage regulator 24 and between the uninterruptible power supply 17, and a breaker 23 may be provided between the uninterruptible power supply 17 and the inverter 16.

In this embodiment, an uninterruptible power supply shutdown circuit 29 may be provided that outputs a signal to the uninterruptible power supply 17 to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18. When a closed circuit is formed, the uninterruptible power supply shutdown circuit 29 outputs a signal to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18.

The uninterruptible power supply shutdown circuit 29 may be connected to the auxiliary contact 21A of the breaker 21. The auxiliary contact 21A may be configured to open and close depending on whether the breaker 21 is ON, tripped, or OFF. Specifically, when the breaker 21 is ON or tripped, the auxiliary contact 21A may be open, and when the breaker 21 is OFF, the auxiliary contact 21A may be closed.

As a result, when the breaker 21 is ON in the normal state and the breaker 21 trips due to an overcurrent, the auxiliary contact 21A remains open, and the uninterruptible power supply shutdown circuit 29 does not output a signal to the uninterruptible power supply 17 to stop the temporary supply of power stored in the battery to the inverter 16 and the control unit 18. Therefore, when the breaker 21 trips due to a power outage or overcurrent and power is no longer supplied to the motor 14 and the control unit 18, the uninterruptible power supply 17 temporarily supplies the power stored in the battery to the inverter 16 and the control unit 18.

In contrast, when the breaker 21 is manually turned OFF, for example, the auxiliary contact 21A closes. When the auxiliary contact 21A closes, the uninterruptible power supply shutdown circuit 29 outputs a signal to the uninterruptible power supply 17 to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18. As a result, the uninterruptible power supply 17 does not temporarily supply the power stored in the battery to the inverter 16 and the control unit 18, so the elevator car 9 does not rise or fall, and the worker who manually turned OFF the breaker 21 for maintenance work, etc., can work safely.

The uninterruptible power supply shutdown circuit 29 may be configured to output, or not output, a signal to the uninterruptible power supply 17 to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18, by the electromagnetic contactor contact 26C of the electromagnetic contactor 26. Specifically, the electromagnetic contactor contact 26C is normally open, and does not output a signal to the uninterruptible power supply 17 to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18. Therefore, when the breaker 21 is tripped due to a power outage or overcurrent, and power is no longer supplied to the motor 14 and the control unit 18, the uninterruptible power supply 17 temporarily supplies the power stored in the battery to the inverter 16 and the control unit 18.

On the other hand, when any of the short-circuiting parts 11, 12, 13 is short-circuited and current is passed through the electromagnetic contactor control coil 26A, the electromagnetic contactor contact 26C closes and outputs a signal to the uninterruptible power supply 17 to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18. As a result, the uninterruptible power supply 17 does not temporarily supply the power stored in the battery to the inverter 16 and the control unit 18, so the elevator car 9 does not rise or fall, and workers who have shorted any of the short-circuiting parts 11, 12, 13 for maintenance work, etc., can work safely.

Next, the method for cutting off the elevator drive power supply according to this embodiment will be described with reference to Figures 2 and 3.

As shown in FIG. 3, one of the short circuit parts 11 (control panel), 12 (top floor), and 13 (bottom floor) shown in FIG. 2 is short circuited by a worker (maintenance worker) (YES in S1).

When any one of the (control panel) short circuit part 11, (top floor) short circuit part 12, and (bottom floor) short circuit part 13 is short circuited, electricity is passed through the electromagnetic contactor control coil 26A connected to them (S2).

In a closed circuit powered by the automatic voltage regulator 24, the electromagnetic contactor contact 26B and the electromagnetic contactor control coil 25A are connected in series, and when electricity is applied to the electromagnetic contactor control coil 26A, the electromagnetic contactor contact 26B opens and the electromagnetic contactor contact 26C closes (S3).

When the electromagnetic contactor contact 26B closes, the power supply to the electromagnetic contactor control coil 25A connected in series with the electromagnetic contactor contact 26B is cut off (S4), and when the electromagnetic contactor contact 26C opens, the uninterruptible power supply shutdown circuit 29 outputs a signal to the uninterruptible power supply 17 to temporarily stop supplying the power stored in the battery to the inverter 16 and the control unit 18 (S5).

When the current to the electromagnetic contactor control coil 25A is cut off, the electromagnetic contactor contact 25B on the connection circuit between the commercial power source 15 and the control unit 18 opens, and power from the commercial power source 15 to the control unit 18 is cut off (S6).

When the power supply from the commercial power source 15 to the control unit 18 is cut off, the power supply to the electromagnetic contactor control coil 19A connected to the control unit 18 is cut off, and since the control unit 18 is not controlled by the power supply not being supplied from the uninterruptible power supply 17, the state in which the power supply to the electromagnetic contactor control coil 20A is cut off is maintained (S7).

By cutting off the current to the electromagnetic contactor control coil 19A, the electromagnetic contactor contact 19B on the connection circuit between the commercial power source 15 and the inverter 16 opens. In addition, by maintaining the current to the electromagnetic contactor control coil 20A cut off, the electromagnetic contactor contact 20B on the connection circuit between the uninterruptible power supply 17 and the inverter 16 remains open (S8).

As described above, when any one of the short circuit parts 11 (control panel), 12 (top floor) and 13 (bottom floor) is short circuited by an operator (maintenance person), the drive power from the commercial power source 15 to the motor 14 via the inverter 16 and the drive power from the uninterruptible power supply 17 to the motor 14 via the inverter 16 are cut off (S9).

[1]
As described above, an elevator system 2 according to the present invention may include a hoistway X1 through which an elevator car 9 rises and falls, a drive unit 4 installed at the top of the hoistway for raising and lowering the elevator car 9, a commercial power source 15 for supplying power to drive the drive unit 4, a control unit 18 for controlling the raising and lowering of the elevator car 9, a control power cut-off means 25 for cutting off the supply of power from the commercial power source 15 to the control unit 18, short-circuiting units 11, 12, 13 for cutting off the supply of power from the commercial power source 15 to the control unit 18 by the control power cut-off means 25 by short-circuiting, and drive power cut-off means 19 for cutting off the supply of power from the commercial power source 15 to the drive unit 4 by cutting off the supply of power from the commercial power source 15 to the control unit 18 by the control power cut-off means 25.

With this configuration, the drive power supply for elevator 1 can be shut off by performing work on the top of the control panel 3, at the top floor landing NT, and at the bottom floor landing NL.

[2]
In the elevator system 2 according to the present invention, the control power supply cut-off means 25 and the drive power supply cut-off means 19 may be electromagnetic contactors 25 , 19 .

With this configuration, the drive power supply for elevator 1 can be cut off using a small device.

[3]
Furthermore, in the elevator system 2 according to the present invention, the short-circuiting sections 11, 12, and 13 may be connected to an automatic voltage regulator 24 that adjusts the voltage of the commercial power source 15, and an electromagnetic contactor control coil 25A constituting the electromagnetic contactor 25 of the control power supply cut-off means 25 may be connected to the connection circuit between the automatic voltage regulator 24 and the short-circuiting sections 11, 12, and 13.

With this configuration, the low-voltage power supply supplied from the automatic voltage regulator 24 can be short-circuited at the short-circuiting sections 11, 12, and 13, thereby safely cutting off the drive power supply for the elevator 1.

[4]
In addition, the elevator system 2 of the present invention further includes a breaker 21 provided on the connection circuit between the drive unit 4 and the commercial power source 15, an uninterruptible power supply 17 that supplies power to the drive unit 4 and the control unit 18 in the event of a power outage, and an uninterruptible power supply shutdown circuit 29 that outputs a signal to stop the function of the uninterruptible power supply 17 supplying power to the drive unit 4 and the control unit 18, and the uninterruptible power supply shutdown circuit 29 may not output a signal to stop the function of supplying power when the breaker 21 is tripped, but may output a signal to stop the function of supplying power when the breaker 21 is turned OFF and when any one of the short-circuiting units 11, 12, 13 is short-circuited.

With this configuration, contrary to the intention of the worker to cut off the power supply to the drive unit 4 in order to perform maintenance work, power is not supplied from the uninterruptible power supply 17 to the drive unit 4, so maintenance work can be performed safely.

[5]
The elevator drive power cutoff method according to the present invention includes a step S1 of short-circuiting the short-circuiting units 11, 12, and 13, which cut off the supply of power from the commercial power source 15 to the control unit 18 by the control power cutoff means 25 by short-circuiting the short-circuiting units 11, 12, and 13;
Step S6 in which the control power cutoff means 25 cuts off the supply of power from the commercial power source 15 to the control unit 18 due to the short circuit of the short-circuiting portions 11, 12, and 13;
and a step S9 in which the drive power cut-off means 19 cuts off the supply of power from the commercial power source 15 to the drive device 4 when the supply of power from the commercial power source 15 to the control unit 18 is cut off.

With this configuration, the drive power supply for elevator 1 can be shut off by performing work on the top of the control panel 3, at the top floor landing NT, and at the bottom floor landing NL.

The elevator system and elevator power supply cutoff method according to the present invention are not limited to the configurations of the above-mentioned embodiments, nor are they limited to the above-mentioned effects. Furthermore, the elevator system and elevator power supply cutoff method can of course be modified in various ways without departing from the gist of the present invention. For example, it is of course possible to arbitrarily select one or more of the configurations and methods according to the various modified examples described below and adopt them in the configurations and methods according to the above-mentioned embodiments.

(A) In the elevator system and elevator drive power cut-off method according to the above embodiment, the short circuit unit 12 provided on the top floor NT and the short circuit unit 13 provided on the bottom floor NL are installed on the hoistway side of the landing threshold. However, the elevator system and elevator drive power cut-off method are not limited to this configuration.

For example, the short circuit portion 12 and the short circuit portion 13 can of course be provided in a terminal box provided at the landing, or inside the box of the landing operation device, and the same effect can be obtained.

(B) In addition, in the elevator system and elevator drive power cut-off method according to the above embodiment, the short-circuiting units 11, 12, and 13 are configured to be short-circuited by inserting a jumper pin. However, the elevator system and elevator drive power cut-off method are not limited to such a configuration.

For example, the shorting of the shorting sections 11, 12, and 13 may be achieved by operating a switch, or by operating a touch panel installed at the boarding area, or of course the same effect can be achieved by operating a mobile terminal connected to the shorting sections 11, 12, and 13.

(C) For example, the order of execution of each process, such as operations, procedures, steps, and stages, in the systems and methods shown in the claims, specifications, and drawings, can be realized in any order, so long as the result of a previous process is not used in a subsequent process. For example, even if "first" and "next" are used for convenience in the description, this does not mean that it is necessary to execute the processes in that order.

1...Elevator, 2...Elevator system, 3...Control panel, 4...Drive unit, 5...Balance weight, 6...Buffer, 7...Balance weight sheave, 8...Main rope, 9...Elevator cage, 10...Cage sheave, 11...Control panel short circuit section, 12...Top floor short circuit section, 13...Bottom floor short circuit section, 14...Motor, 15...Commercial power source, 16...Inverter, 17...Uninterruptible power supply (UPS), 18...Control unit, 19, 20, 25, 26...Electromagnetic contactor, 19A, 20A, 25A, 26A...Electromagnetic contactor control coil, 19B, 20B, 25B, 26B, 26C...Electromagnetic contactor contacts, 21, 22, 23,...Breaker, 21A...Breaker auxiliary auxiliary contact, 24...Automatic voltage regulator, 27...Power cut-off section, 28...Battery connection section, 29...Uninterruptible power supply shutdown circuit

Claims (3)

a hoistway through which the elevator car ascends and descends;
A drive device that raises and lowers the elevator car, the drive device being installed at an upper portion of the elevator shaft;
a commercial power source that supplies power to drive the drive device;
A control unit that controls the elevation and lowering of the elevator car;
a control power cutoff means for cutting off the supply of power from the commercial power source to the control unit;
a short circuit unit that cuts off the supply of power from the commercial power source to the control unit by the control power cutoff means when the short circuit occurs;
a drive power cutoff means for cutting off the supply of power from the commercial power source to the drive device when the control power cutoff means cuts off the supply of power from the commercial power source to the control unit ;
The control power supply cutoff means and the drive power supply cutoff means are electromagnetic contactors,
The short-circuiting portion is connected to an automatic voltage regulator that adjusts the voltage of the commercial power supply, and an electromagnetic contactor control coil that constitutes the electromagnetic contactor of the controlled power supply cutoff means is connected to a connection circuit between the automatic voltage regulator and the short-circuiting portion.
Elevator system. a hoistway through which the elevator car ascends and descends;
A drive device that raises and lowers the elevator car, the drive device being installed at an upper portion of the elevator shaft;
a commercial power source that supplies power to drive the drive device;
A control unit that controls the elevation and lowering of the elevator car;
a control power cutoff means for cutting off the supply of power from the commercial power source to the control unit;
a short circuit unit that cuts off the supply of power from the commercial power source to the control unit by the control power cutoff means when the short circuit occurs;
a drive power cutoff means for cutting off the supply of power from the commercial power source to the drive device when the control power cutoff means cuts off the supply of power from the commercial power source to the control unit;
a breaker provided on a connection circuit between the drive device and the commercial power supply;
an uninterruptible power supply that supplies power to the drive device and the control unit during a power outage;
an uninterruptible power supply shutdown circuit that outputs a signal to stop a function of supplying power to the drive device and the control unit of the uninterruptible power supply;
The uninterruptible power supply shutdown circuit does not output a signal to stop the function of supplying power when the breaker is tripped, but outputs a signal to stop the function of supplying power when the breaker is turned OFF and when any one of the short-circuiting parts is short-circuited.
Elevator system. a step of cutting off the supply of power from a commercial power source to a control unit by a controlled power source cutoff means which is an electromagnetic contactor by short-circuiting the short-circuiting part, the short-circuiting part being connected to an automatic voltage regulator which adjusts the voltage of the commercial power source, and an electromagnetic contactor control coil constituting the electromagnetic contactor of the controlled power source cutoff means being connected to a connection circuit between the automatic voltage regulator and the short -circuiting part;
a step of cutting off the supply of power from the commercial power source to the control unit by the control power cutoff means due to a short circuit at the short-circuiting portion;
a step of cutting off the supply of power from the commercial power source to the control unit by a drive power cutting means which is an electromagnetic contactor, cutting off the supply of power from the commercial power source to the drive unit.

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