Elevator power supply control device and elevator power supply control method

Abstract

The present application provides an elevator power supply control device and an elevator power supply control method. In the event of a power supply abnormality in a main power supply circuit connected to a cutout, appropriate automatic stop operation can be performed. A first cutout (111) is provided in a control panel (110) and is connected to a power supply circuit that supplies a main power supply. A second cutout (101) is connected to the power supply circuit at a location different from the control panel (110). The second cutout (101) has an auxiliary contact (101a) that is opened in conjunction with the opening of a main contact and an alarm contact (101b) that is closed when an abnormality in the main power supply is detected by the cutout. When the supply of the main power supply is detected to have stopped in a state in which the closing of the alarm contact (101b) is detected, power from a power outage storage battery (116) is supplied to an elevator main circuit (115), and automatic stop operation of the elevator is performed.

Description

TECHNICAL FIELD

[0001] The present application relates to an elevator power supply control device and an elevator power supply control method. BACKGROUND

[0002] In the case of an elevator provided with a machine room, a main power supply operating device is generally provided in a control panel in the machine room. By manual operation of the main power supply operating device, the main power supply to the hoisting machine can be cut off. However, cutting off the main power supply using the main power supply operating device is basically limited to the time of maintenance of the elevator, and sudden cutting off of the main power supply is prohibited during normal operation. For example, a case is considered in which the main power supply is temporarily cut off by the main power supply operating device during maintenance work, and it is confirmed whether the brake is working properly or not.

[0003] Further, there is also a case in which a main power supply cutoff machine (a second main power supply operating device) is provided separately from the main power supply operating device near the entrance of the machine room. If the main power supply cutoff machine is provided near the entrance of the machine room, the maintenance personnel entering the machine room can immediately perform the operation of cutting off the main power supply, and thus rapid response in an emergency can be performed.

[0004] However, the situation of cutting off the main power supply of the elevator also occurs when a power failure, grounding, short circuit, electric leakage, or the like occurs. When a power failure or a power supply abnormality occurs during the operation of the elevator, the car in operation can automatically stop at the nearest floor. That is, the elevator is provided with a battery for emergency use, and when a power supply abnormality due to a power failure or the like occurs, the elevator automatically stops at the nearest floor using the power supplied from the battery. In addition, the power supply abnormality such as grounding, short circuit, electric leakage, or the like is detected by an overcurrent protection function or an electric leakage protection function.

[0005] On the other hand, the case of cutting off the main power supply by manual operation of the above-described main power supply operating device is, for example, a case in which an operator wants to make an emergency stop of the operation for some reason during the execution of maintenance work, but in such a case, the car is immediately stopped, and automatic stopping is prohibited.

[0006] Patent Document 1 describes an example of an elevator that automatically stops at the nearest floor when a power failure occurs.

[0007] PRIOR ART DOCUMENT

[0008] PATENT DOCUMENT

[0009] Patent Document 1: Japanese Patent Application Publication No. 2018-167920 SUMMARY

[0010] PROBLEMS TO BE SOLVED BY THE INVENTION

[0011] Power supply abnormalities such as power failure, grounding, short circuit, and electric leakage can occur in normal elevator operation, and in such a case, the elevator needs to perform automatic stop operation in order to prevent a passenger from being trapped. Here, the power supply abnormalities such as grounding, short circuit, and electric leakage can also occur due to an abnormality of a cutoff machine (second main power supply operating device) outside the control panel. In particular, even a cutoff machine provided near an entrance of a machine room can have a power supply abnormality.

[0012] However, as explained in the section of background art, since automatic stop is prohibited at the time of manual operation of the main power supply operating device (cutoff machine), a situation where automatic stop operation cannot be performed can occur when grounding, short circuit, electric leakage, or the like occurs due to an abnormality in a main power supply circuit connected to the main power supply operating device.

[0013] The present application is made in view of this, and aims to provide an elevator power supply control device and an elevator power supply control method that can perform appropriate automatic stop operation when a power supply abnormality occurs in a main power supply circuit connected to a cutoff machine.

[0014] - Means for solving the problem -

[0015] To solve the above problem, for example, the structure described in the technical solution is adopted.

[0016] The present application includes a plurality of solutions to the above problem, and if one example is cited, as an elevator power supply control device, it is applied to an elevator power supply control device having: a first cutoff machine provided in a control panel, connected to a power supply circuit that supplies a main power supply, having a main contact that cuts off the main power supply and an auxiliary contact that is opened in conjunction with the cutting off of the main contact; a second cutoff machine connected to the power supply circuit at a position different from the control panel, having a main contact that cuts off the main power supply and an auxiliary contact that is opened in conjunction with the cutting off of the main contact; an elevator main circuit supplied with the main power supply via the power supply circuit to which the first cutoff machine and the second cutoff machine are connected, to obtain a power supply for driving the elevator; a detection circuit that connects the respective auxiliary contacts in series; and a control circuit that stops the elevator main circuit when the opening of any one of the auxiliary contacts is detected by the detection circuit, and supplies a power supply from a power failure storage battery to the elevator main circuit when the supply of the main power supply to the elevator main circuit is detected to be stopped in a state where the closing of the auxiliary contact is detected by the detection circuit, to perform automatic stop operation of the elevator.

[0017] Here, an alarm contact that is closed when an abnormality of the main power supply is detected by the second cutoff machine is connected in parallel to the auxiliary contact of the second cutoff machine, and when the supply of the main power supply is detected to be stopped in a state where the closing of the alarm contact is detected by the detection circuit, the control circuit supplies a power supply from the power failure storage battery to the elevator main circuit to perform automatic stop operation of the elevator.

[0018] -Effects of Invention-

[0019] According to the present application, when the main power is cut off by the operation of the second cutout, the main power is immediately cut off, and the automatic stop operation is not performed. On the other hand, when the power at the site of the second cutout is abnormal, the automatic stop operation based on the on of the alarm contact is performed, and the rescue of passengers based on the automatic stop operation can be appropriately performed.

[0020] The above problems, structures, and effects other than the above are clarified by the following embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural view showing a configuration example of a cutout in a machine room of one embodiment example of the present application.

[0022] Figure 2 is a circuit diagram showing an example of a power supply device of an elevator of one embodiment example of the present application.

[0023] Figure 3 is a flowchart showing an example of control processing of a control circuit of one embodiment example of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 10 … hoistway, 11 … car, 12 … counterweight, 13 … main rope, 14 … hoisting machine, 21 … lobby, 30 … machine room, 31 … first entrance, 32 … second entrance, 101 … second cutout (entrance set cutout), 101a … auxiliary contact, 101b … alarm contact, 102 … third cutout (entrance set cutout), 102a … auxiliary contact, 102b … alarm contact, 103 … detection circuit, 104 … power lead-in, 105 … cutout, 110 … elevator control panel, 111 … first cutout, 111a … auxiliary contact, 112 … cutout operation part, 113 … noise filter, 114 … building power supply contactor, 115 … elevator main circuit, 116 … power failure storage battery, 117 … storage battery power supply contactor, 121 … control circuit, 122 … auxiliary storage battery. DETAILED DESCRIPTION

[0026] Hereinafter, an elevator power control device and an elevator power control method of one embodiment example (hereinafter, referred to as “the present example”) of the present application will be described with reference to the drawings.

[0027] [Structure of elevator and machine room]

[0028] Figure 1 shows a structural example of an elevator to which the elevator power control device of the present example is applied.

[0029] In this example, the elevator has a car 11 installed in the elevator shaft 10. The car 11 and the counterweight 12 are connected via a main hoist 13. Driven by a traction machine 14 wound with the main hoist 13, the car 11 moves up and down. The car 11 stops in the waiting hall 21 on each floor.

[0030] A machine room 30 is provided at the upper part of the elevator shaft 10. The machine room 30 is equipped with a traction machine 14 and an elevator control panel 110. The elevator control panel 110 controls the power supply to the traction machine 14. The elevator control panel 110 is equipped with a cut-off machine 111 for operators to manually cut off the power.

[0031] In addition, the computer room 30 is equipped with a first entrance 31 and a second entrance 32. Inside the computer room 30 (on walls, etc.) near each entrance 31 and 32, cutting machines 101 and 102 are prepared for installation. These cutting machines 101 and 102 at each entrance also serve as devices for personnel entering the computer room 30 to manually perform cutting operations. These cutting machines 111, 101, and 102 all have overcurrent protection or leakage protection functions. When an abnormal power supply is detected by the overcurrent protection or leakage protection function, each cutting machine 111, 101, and 102 will perform a cutting action.

[0032] In the following description, the cut-off machine 111 of the elevator control panel 110 is referred to as the first cut-off machine, the cut-off machine 101 near the first entrance / exit 31 is referred to as the second cut-off machine, and the cut-off machine 102 near the second entrance / exit 32 is referred to as the third cut-off machine.

[0033] In addition, such as Figure 1 As shown, a cutting machine 105 can also be installed in the pit or other lifting channel at the bottom of the lifting channel 10.

[0034] [Structure of the power supply circuit]

[0035] Figure 2 This describes the circuit structure of the elevator power supply device that supplies power for elevator drive to the traction machine 14.

[0036] like Figure 2 As shown, the main power supply (200V three-phase AC building power) supplied via power inlet line 104 is supplied to the elevator control panel 110 via the second cut-off mechanism 101 and the third cut-off mechanism 102. Figure 1 As shown, the second cutter 101 and the third cutter 102 are cutters installed at the entrances near the first entrance 31 and the second entrance 32.

[0037] The main power supply to the elevator control panel 110 is connected to the first cutout 111. The first cutout 111 has a cutout operation portion 112, and has an auxiliary contact 111a that is turned on / off in conjunction with the cutout of the main power supply in the cutout operation portion 112. That is, the auxiliary contact 111a is turned on when the cutout operation of the main power supply in the cutout operation portion 112 is not performed, and is turned off when the cutout operation of the main power supply in the cutout operation portion 112 is performed. This auxiliary contact 111a is connected in series with the other auxiliary contacts 101a, 102a described later.

[0038] The main power supply that has passed through the first cutout 111 is supplied to the elevator main circuit 115 via a noise filter 113 and a building power supply feeding contactor 114.

[0039] The elevator main circuit 115 has an inverter, a converter, and performs conversion of frequency and voltage for supply to the hoisting machine 14 (traction machine) 14 by control from a control circuit 121, and supplies the converted power as a power for elevator drive to the hoisting machine 14. Figure 1 ) supply to the hoisting machine 14 (traction machine) 14 by control from a control circuit 121, and performs conversion of frequency and voltage for supply to the hoisting machine 14 (traction machine) 14 by control from a control circuit 121, and supplies the converted power as a power for elevator drive to the hoisting machine 14 (traction machine) 14.

[0040] Further, the power supply from the emergency power storage battery 116 is supplied to the elevator main circuit 115 via an emergency power storage battery power supply feeding contactor 117. The power supply from the emergency power storage battery 116 is performed by the control circuit 121. Then, conversion of frequency and voltage for supply to the hoisting machine 14 is performed by the elevator main circuit 115, and the converted power is supplied as a power for elevator drive to the hoisting machine 14.

[0041] In addition, the power for elevator drive from the emergency power storage battery 116 to the hoisting machine 14 via the elevator main circuit 115 is a power for automatic stop operation, and is supplied for only a few seconds for stopping at the nearest landing lobby 21.

[0042] The power supply route between the noise filter 113 and the building power supply feeding contactor 114 is monitored by the control circuit 121, and it is detected whether the main power supply is supplied as the building power supply. In a state where the cutout operation is not performed in each cutout 111, 101, 102 by the process described later, if it is detected that the main power supply is not supplied, the control circuit 121 supplies the power for elevator drive from the emergency power storage battery 116 to the hoisting machine 14 via the elevator main circuit 115, and performs the automatic stop operation. Details of the judgment process for performing this automatic stop operation are described later.

[0043] The control circuit 121 may be configured as a computer, which includes a CPU (Central Processing Unit) that directs the execution of program-based computational processing, and a memory that performs computational processing under the control of the CPU. Furthermore, when no external power is available, the control circuit 121 operates using power from the auxiliary battery 122.

[0044] Next, the structure of the second cutter 101 and the third cutter 102, which are cutters installed at the entrance and exit, will be described.

[0045] The second cutter 101 and the third cutter 102 are cutters that perform the main power cut-off operation, and are respectively equipped with auxiliary contacts 101a and 102a and alarm contacts 101b and 102b.

[0046] That is, the second cut-off mechanism 101 has an auxiliary contact 101a that is disconnected in conjunction with the disconnection of the main power supply, and an alarm contact 101b connected in parallel with the auxiliary contact 101a. The auxiliary contact 101a is a contact that is disconnected in conjunction with the disconnection of the main power supply in the second cut-off mechanism 101, and is always connected when the main power supply in the second cut-off mechanism 101 is not disconnected. The alarm contact 101b is a contact that is connected when an abnormality (grounding, short circuit, leakage, etc.) in the main power supply of the second cut-off mechanism 101 is detected, and is disconnected when no abnormality in the main power supply is detected.

[0047] The auxiliary contacts 102a and alarm contacts 102b of the third cut-off machine 102 are also controlled to be on / off based on the main power supply disconnection operation and the detection of main power supply abnormalities, just like the auxiliary contacts 101a and alarm contacts 101b of the second cut-off machine 101.

[0048] like Figure 2 As shown, two auxiliary contacts 101a and 102a, and alarm contacts 101b and 102b connected in parallel with these auxiliary contacts 101a and 102a, are connected in series with the auxiliary contact 111a of the first cut-off machine 111. A given DC voltage (48V, etc.) is supplied to one end of the series circuit of these auxiliary contacts 101a, 102a, 111a and alarm contacts 101b and 102b, and a detection circuit 103 for this DC voltage is connected to the other end.

[0049] In addition, a timer is assembled in the detection circuit 103 to count the time (about a few seconds) required for automatic docking operation.

[0050] The detection state of the direct current voltage in the detection circuit 103 is judged by the control circuit 121. For example, in the case where the main power supply is not cut off by any of the cut-off devices 101, 102, 111, each auxiliary contact 101a, 102a, 111a is closed, and a given voltage is detected by the detection circuit 103. At this time, the control circuit 121 judges that the cut-off of the main power supply is not performed in any of the cut-off devices 101, 102, 111.

[0051] The control circuit 121 judges that there is no power failure and continues the operation of the elevator main circuit 115 as it is when the control circuit 121 judges that each auxiliary contact 101a, 102a, 111a is closed and no cut-off operation is performed in the case where the main power supply is supplied to the elevator main circuit 115.

[0052] Further, in the case where the cut-off of the main power supply is performed in any of the cut-off devices (any of the cut-off devices 101, 102, 111), any of the auxiliary contacts 101a, 102a, 111a is opened, and thus the given voltage is not detected by the detection circuit 103. Here, the control circuit 121 performs the process of stopping the main power supply based on the cut-off operation of the main power supply by any of the cut-off devices (any of the cut-off devices 101, 102, 111) when the main power supply is not supplied to the elevator main circuit 115 and the given voltage is not detected by the detection circuit 103. That is, the control circuit 121 judges that the main power supply is stopped due to something other than the power failure, and stops the elevator main circuit 115 without performing the automatic stop operation.

[0053] However, in the case of the second cut-off device 101 and the third cut-off device 102, since the alarm contacts 101b, 102b are connected in parallel with the auxiliary contacts 101a, 102a, in the case where the cut-off operation is performed by the protection function of the overcurrent or the leakage current in any of the cut-off devices 101, 102, the corresponding alarm contact 101b or 102b is closed. Thus, the given voltage is detected by the detection circuit 103.

[0054] The control circuit 121 causes the timer incorporated in the detection circuit 103 to operate and performs the automatic stop operation in the case where the main power supply is not supplied to the elevator main circuit 115 and the given voltage is detected by the detection circuit 103.

[0055] That is, in the case where a ground fault, a short circuit, an electric leakage, or the like occurs in the main power supply circuit from the two entrances 31, 32 to the main power supply cutout 111 of the elevator control panel 110, the overcurrent protection function or the electric leakage protection function operates in at least one of the second cutout 101 and the third cutout 102 in the vicinity of the entrances 31, 32. Further, the cutout operation is performed by the second cutout 101 or the third cutout 102 through the overcurrent protection function or the electric leakage protection function. At this time, the auxiliary contact 101a, 102a linked to the second cutout 101, the third cutout 102 is cut off and becomes the open state in linkage, and thus, the condition in which the automatic stop operation cannot be performed is created.

[0056] Here, in the case of the present example, the alarm contact 101b, 102b is connected in parallel to the auxiliary contact 101a, 102a on the second cutout 101 and the third cutout 102, and the alarm contact 101b, 102b issues an alarm in the case where the cutout operation is performed by the second cutout 101 or the third cutout 102 through the overcurrent protection function or the electric leakage protection function.

[0057] For example, in the case where a ground fault, a short circuit, an electric leakage, or the like occurs in the main power supply circuit from the two entrances 31, 32 to the main power supply cutout 111 of the elevator control panel 110, the cutout operation is performed by at least one of the second cutout 101 and the third cutout 102 in the vicinity of the two entrances 31, 32 through the overcurrent protection function or the electric leakage protection function.

[0058] At this time, the auxiliary contact 101a, 102a linked to the operating cutout 101, 102 is cut off and opened, but since it is the cutout operation in the protection function, the alarm contact 101b, 102b maintains the on state. That is, the on state of the alarm contact 101b, 102b is detected by the detection circuit 103 for the automatic stop operation, and the timer in the detection circuit 103 operates. Then, the control circuit 121 supplies the power from the power supply battery 116 to the elevator main circuit 115 during the operation of the timer, and performs the automatic stop operation.

[0059] Further, the cutout 111 in the elevator control panel 110 is provided only with the auxiliary contact 111a, and is not configured to connect the alarm contact in parallel to the auxiliary contact 111a.

[0060] This is because, in the inside of the control function of the elevator, in the case where the cutout is caused by the overcurrent or the electric leakage of the cutout (main contact operating device), the function of the automatic rescue operation at the time of power failure does not normally operate. Thus, it is possible to reduce the possibility of occurrence of a secondary failure.

[0061] [Control operation from the control circuit]

[0062] Figure 3 is a flowchart showing a control action example in the case where the cutoff due to the detection of overcurrent or leakage current in the detection circuit 103 is detected.

[0063] The control circuit 121 monitors the power supply path between the noise filter 113 and the building power supply contactor 114, and determines whether or not the supply of the main power to the elevator main circuit 115 is stopped (step Sll).

[0064] In this case, in the case where the supply of the main power is not stopped (NO in step Sll), the control circuit 121 repeats the determination of step Sll.

[0065] Then, in the case where it is determined in step Sll that the supply of the main power is stopped (YES in step Sll), the control circuit 121 determines whether or not the timer of the detection circuit 103 is in operation (step S12). In the case where the timer of the detection circuit 103 is in operation, that is, in the case where the closing of the alarm contacts 101b, 102b is detected (YES in step S12), the control circuit 121 supplies the power from the power storage battery 116 to the elevator main circuit 115, and executes the automatic stop operation (step S13).

[0066] That is, after the automatic stop operation is started in step S13, the determination of step S12 is returned, and the automatic stop operation is executed during the period in which the timer is in operation. The automatic stop operation is an operation for stopping the car at the nearest floor for a period of, for example, several seconds.

[0067] Then, in the case where the timer of the detection circuit 103 is not in operation in step S12 (NO in step S12), the control circuit 121 stops the supply of the power to the elevator main circuit 115 (step S14), and ends the process in the case where the main power is supplied to the elevator main circuit 115.

[0068] As described above, according to the elevator power control device of the present example, in the case where the cutoff operation is performed by the second cutoff machine 101 or the third cutoff machine 102 provided near the entrances 31, 32 of the machine room 30, the automatic stop operation is not performed, and the operation of the elevator is immediately stopped by the cutoff operation.

[0069] On the other hand, in the case where the cutoff operation is performed by the overcurrent protection function or the leakage protection function in the second cutoff machine 101 or the third cutoff machine 102, the automatic stop operation is performed by detecting the closing of the alarm contacts 101b or 102b, and the evacuation of the passengers can be appropriately performed.

[0070] Further, in the case of the first cutout 111 provided to the elevator control panel 110, even if the cutout operation is performed by the overcurrent protection function or the leakage protection function, the automatic stop operation is not performed. Thus, in the case where the function of the automatic stop operation at the time of power failure can not work properly, the automatic stop operation can be prevented from being performed.

[0071] [Modified example]

[0072] Further, the embodiment examples explained so far are explained in detail for easily understanding the present application, and are not necessarily limited to having all the structures explained.

[0073] For example, in the structure of Figure 1 , the two entrances 31, 32 are provided to the machine room 30, and the cutouts 101, 102 are provided to each of the entrances 31, 32. In contrast to this, in the case of the structure where one entrance is provided to the machine room 30, the third cutout 102 can be omitted.

[0074] Further, the cutout can be provided at a place other than the vicinity of the entrance of the machine room 30.

[0075] For example, as shown in Figure 1 , the cutout 105 can be provided in the pit at the bottom of the hoistway 10. In this case, the cutout 105 is connected to the main power supply circuit like the cutouts 101, 102 shown in Figure 2 , and is connected in series to the other auxiliary contact points on the basis of being connected in parallel to the auxiliary contact point and the alarm contact point.

[0076] Thus, the car is immediately stopped by the cutout operation of the cutout 105 by the worker in the pit, and the automatic stop operation at the time of power failure is performed in the case where the cutout operation is performed by the overcurrent protection function or the leakage protection function in the cutout 105.

Claims

1. An elevator power supply control device, comprising: a first cutout provided in a control panel, connected to a power supply circuit that supplies a main power supply, having a main contact that cuts off the main power supply and an auxiliary contact that is opened in conjunction with the cutting off of the main contact; a second cutout connected to the power supply circuit at a location different from the control panel, having a main contact that cuts off the main power supply and an auxiliary contact that is opened in conjunction with the cutting off of the main contact; an elevator main circuit that is supplied with the main power supply via the power supply circuit to which the first cutout and the second cutout are connected, and that obtains a power supply for driving an elevator; a detection circuit that connects the respective auxiliary contacts in series; and a control circuit that stops the elevator main circuit when the opening of any one of the auxiliary contacts is detected by the detection circuit, and that supplies a power supply from a power failure storage battery to the elevator main circuit when the supply of the main power supply to the elevator main circuit is detected to have stopped in a state in which the closing of the auxiliary contact is detected by the detection circuit, and that performs automatic landing operation of the elevator, characterized in that an alarm contact that is closed when an abnormality in the main power supply is detected by the second cutout is connected in parallel to the auxiliary contact of the second cutout, and the control circuit supplies the power supply from the power failure storage battery to the elevator main circuit when the supply of the main power supply is detected to have stopped in a state in which the closing of the alarm contact is detected by the detection circuit, and performs automatic landing operation of the elevator.

2. The elevator power supply control device according to claim 1, wherein the second cutout is provided in the vicinity of an entrance to a machine room of an elevator.

3. The elevator power supply control device according to claim 1, wherein a timer that counts a certain time is provided in the detection circuit, and the control circuit performs automatic landing operation of the elevator during a period in which the closing of the alarm contact causes the timer to count the certain time in a state in which the cutting off of the main power supply is detected, and stops the supply of the power supply from the power failure storage battery after the certain time elapses.

4. The elevator power supply control device according to claim 1, further comprising a third cutout connected to the power supply circuit, having a main contact that cuts off the main power supply, an auxiliary contact that is opened in conjunction with the cutting off of the main contact, and an alarm contact connected in parallel to the auxiliary contact, the respective auxiliary contacts are connected in series to the detection circuit, and the control circuit also supplies the power supply from the power failure storage battery to the elevator main circuit when the closing of the alarm contact of the third cutout is detected, and performs automatic landing operation of the elevator.

5. An elevator power supply control method that controls an elevator power supply device, the elevator power supply device comprising: a first cutout provided in a control panel, connected to a power supply circuit that supplies a main power supply, having a main contact that cuts off the main power supply and an auxiliary contact that is opened in conjunction with the cutting off of the main contact; ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ a second cutout connected to the power supply circuit at a position different from the control panel, having a main contact for cutting off the main power supply, an auxiliary contact opened in conjunction with the cutting off of the main contact, and an alarm contact connected in parallel to the auxiliary contact and turned on in the event of a power supply abnormality; and an elevator main circuit supplied with the main power supply via the power supply circuit to which the first cutout and the second cutout are connected, to obtain a power supply for driving the elevator, The elevator power supply control method is characterized in that an automatic stop operation process is executed, in the event that the supply of the main power supply to the elevator main circuit is detected to have stopped in a state in which the alarm contact is detected to be turned on, the power supply from a power failure storage battery is supplied to the elevator main circuit, and the automatic stop operation of the elevator is performed.

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