JP6105123B1 - Power control device for emergency elevator - Google Patents

Abstract

Control power can be supplied even when a control power operation switch provided at a landing is grounded. In a power supply control device 20A according to an embodiment, a contact 12 of a control power contactor 1SC is connected between a main power supply 1 and a primary side of a control power transformer 11, and the control is performed by turning on the contact 12. Control power supply operation fuses 14a and 14b and a control power supply operation switch are provided between the control power supply circuit 21 that outputs control power from the secondary side of the power transformer 11 and the coil 13 of the main power supply 1 and the control power supply relay 1SCR. 15 is connected between the control power supply operation switch input circuit 22 connected in series, the main power supply 1 and the coil 16 of the control power supply contactor 1SC, the contacts 17a and 17b of the control power supply relay 1SCR, and the fire fighting operation switch. And a control power supply switching circuit 23 connected in parallel with contacts 29a and 29b which are turned on in response to operations of 31 and 33. [Selection] Figure 2

Description

  Embodiments described herein relate generally to an emergency elevator power control device.

  Emergency elevators are installed for the purpose of fire extinguishing work by fire brigades and rescue work for people left in the building when a building fire is difficult to extinguish. Conventionally, an emergency elevator has a hoisting machine, a control panel, and the like installed in a machine room surrounded by a fire-resistant floor and walls. On the other hand, in recent years, elevators in which hoisting machines and control panels are installed in hoistways without providing machine rooms are becoming mainstream, and even elevators without such machine rooms can be applied to emergency elevators. It is being considered.

  Since an elevator without a machine room has a control panel installed in the hoistway, when operating a control power source during maintenance and inspection, the power breaker provided inside the control panel cannot be operated directly. For this reason, a control power supply operation switch is provided on the backside of the floor display of the hall, and the control power supply of the elevator can be operated by operating this control power supply operation switch.

  When an elevator without a machine room is applied to an emergency elevator, it is assumed that a ground fault occurs in a control power operation switch provided at the landing due to spraying of fire-extinguishing water. In this case, the fuse provided to prevent overcurrent is blown, and even if the control power operation switch is turned on, the control power is not supplied and the emergency elevator does not operate. Because emergency elevators are required to operate reliably when performing fire extinguishing work, etc., when applying elevators without a machine room to emergency elevators, control provided at the landing by spraying fire extinguishing water, etc. It is desirable to take effective measures when the power operation switch is grounded.

Japanese Patent No. 5349743

  The problem to be solved by the present invention is to provide a power control device for an emergency elevator that can supply control power even when a control power operation switch provided at a landing is grounded.

  The power control device of the embodiment is an emergency elevator in which a control power operation switch for operating the control power of the elevator is provided at the landing, and a fire fighting operation switch for switching the elevator control mode to the fire fighting operation mode is provided in the car. It is a power supply control device. The power control apparatus includes a control power supply circuit, a control power operation switch input circuit, and a control power switching circuit. In the control power supply circuit, a contact of a control power contactor is connected between the main power supply and the primary side of the control power transformer, and when the contact is turned on, the control power is supplied from the secondary side of the control power transformer. Output. In the control power supply operation switch input circuit, the control power supply operation switch and the control power supply operation fuse are connected in series between the main power supply and the coil of the control power supply relay. In the control power supply switching circuit, a contact of the relay for the control power supply and a contact that is turned on in response to the operation of the fire fighting operation switch are connected in parallel between the main power supply and the coil of the contactor for the control power supply. ing.

FIG. 1 is a configuration diagram of a power supply control device of a comparative example. FIG. 2 is a configuration diagram of the power supply control device according to the first embodiment. FIG. 3 is a timing chart for explaining the operation of the power supply control apparatus according to the first embodiment. FIG. 4 is a configuration diagram of a power supply control device according to the second embodiment. FIG. 5 is a configuration diagram of a power supply control device according to the third embodiment. FIG. 6 is a configuration diagram of a power supply control device according to the fourth embodiment. FIG. 7 is a flowchart illustrating an example of processing for detecting contact signal mismatch. FIG. 8 is a configuration diagram of a power supply control device according to the fifth embodiment. FIG. 9 is a configuration diagram of a power supply control device according to the sixth embodiment.

  Hereinafter, a power control device for an emergency elevator according to an embodiment will be described in detail with reference to the drawings. The power control device of the present embodiment allows the control power to be supplied according to the operation of the fire fighting operation switch in the car even when the control power operation switch of the hall is grounded due to the spraying of fire extinguishing water, etc. The emergency elevator is configured to operate reliably when fire extinguishing work is performed.

<Comparative example>
First, prior to description of a specific embodiment, a general configuration of a power supply control device when an elevator without a machine room is applied to an emergency elevator will be described as a comparative example.

  FIG. 1 is a configuration diagram of a power supply control device 100 of a comparative example. The main power source 1 supplied from the customer is connected to the input of the inverter 4 via the main power source breaker 2 and the contact 3 of the inverter contactor (electromagnetic contactor) MC. The output of the inverter 4 is connected to the motor of the hoisting machine 5. A main rope 8 connecting the car 6 and the counterweight 7 is hung on the sheave of the hoisting machine 5. The inverter 4 converts the power of the main power source 1 in accordance with a control command from the control microcomputer 9 that operates by supplying the control power while the contact 3 of the main power breaker 2 and the contactor MC for the inverter is turned on. Then, the motor of the hoisting machine 5 is driven and controlled. Thereby, the main rope 8 is fed and the car 6 moves up and down in the hoistway. The contact 3 of the inverter contactor MC is turned on when the coil 10 of the inverter contactor MC is energized and excited by the supply of control power.

  The supply of control power to the emergency elevator is controlled by the power supply control device 100. The power control apparatus 100 according to the comparative example includes a control power supply circuit 101, a control power operation switch input circuit 102, and a control power switching circuit 103.

  The control power supply circuit 101 connects the secondary side of the main power breaker 2 and the primary side of the control power transformer 11 via the contact 12 of the control power contactor (electromagnetic contactor) 1SC, and is used for the control power supply. In this configuration, the output on the secondary side of the transformer 11 is supplied as a control power source. That is, the control power supply circuit 101 is connected to the control power supply contactor 1SC between the main power supply 1 and the control power supply transformer 11, and the control power supply circuit 101 is connected to the control power supply circuit 101 with the main power breaker 2 turned on. When the contact 12 of the contactor 1SC is turned on, the control power is output from the secondary side of the control power transformer 11.

  The control power operation switch input circuit 102 connects the secondary side R phase of the main power circuit breaker 2 and one end side of the coil 13 of the control power relay (electromagnetic relay) 1SCR, the control power operation fuse 14a, and the control power operation of the landing. This is a configuration in which the other end of the coil 13 of the control power relay 1SCR and the secondary S phase of the main power breaker 2 are connected via a control power operation fuse 14b. That is, the control power supply operation switch input circuit 102 includes a control power supply operation fuse 14a, 14b and a control power supply operation switch 15 at the landing connected in series between the main power supply 1 and the coil 13 of the control power supply relay 1SCR. Yes.

  The control power supply switching circuit 103 connects the secondary side R phase of the main power supply breaker 2 and one end side of the coil 16 of the control power supply contactor 1SC via a contact (a contact) 17a of the control power supply relay 1SCR. The other end of the coil 16 of the control power contactor 1SC and the secondary S phase of the main power breaker 2 are connected via a contact (a contact) 17b of the control power relay 1SCR. That is, in the control power supply switching circuit 103, the contacts 17a and 17b of the control power supply relay 1SCR are connected between the main power supply 1 and the coil 16 of the control power supply contactor 1SC. The contacts 17a and 17b of the control power relay 1SCR are contacts that are turned on in response to an operation (on operation) of the control power operation switch 15 at the hall.

  In the power control apparatus 100 of the comparative example configured as described above, the worker turns on the control power operation switch 15 at the landing when the main power breaker 2 is turned on, for example, during maintenance and inspection of the emergency elevator. Then, when the coil 13 of the control power relay 1SCR is energized and excited, the contacts 17a and 17b of the control power relay 1SCR are turned on. When the contacts 17a and 17b of the control power supply relay 1SCR are turned on, the coil 16 of the control power contactor 1SC is energized and excited to turn on the contact 12 of the control power contactor 1SC. As a result, the control power is output from the secondary side of the control power transformer 11. The control power output from the secondary side of the control power transformer 11 is supplied to the control circuit of each part of the emergency elevator including the control microcomputer 9.

  Here, consider a case where water enters the equipment (floor display or the like) provided with the control power operation switch 15 at the landing due to, for example, spraying of fire-extinguishing water, and the control power operation switch 15 is grounded. The control power operation switch input circuit 102 includes control power operation fuses 14 a and 14 b in series with the control power operation switch 15 in order to prevent damage to the equipment due to an overcurrent flowing due to a ground fault of the control power operation switch 15. Is provided. When the control power supply operation switch 15 is grounded, the control power supply operation fuses 14a and 14b are blown. Therefore, even if the control power supply operation switch 15 is turned on, the coil 13 of the control power supply relay 1SCR is not energized. Control power is not supplied to the control circuit of each part of the emergency elevator including the control microcomputer 9. For this reason, there is a concern that the emergency elevator will not operate and may hinder fire extinguishing work by the fire brigade.

  By the way, in the emergency elevator, a fire fighting operation switch for switching the elevator control mode to the fire fighting operation mode is provided in the car. The fire fighting operation switch is normally configured as a key switch that can be turned on in two stages. The first stage is a primary fire fighting operation switch, and the second stage is a secondary fire fighting operation switch. When the primary fire fighting operation switch is turned on, the elevator control mode is switched to the primary fire fighting operation mode. In the primary fire-fighting operation mode, the hall call is disabled and the raising / lowering of the car is controlled only in accordance with the car call. When the secondary fire fighting operation switch is turned on, the elevator control mode is switched to the secondary fire fighting operation mode. In the secondary fire-fighting operation mode, the door open detection signal that is output when the car or the landing door is open is invalidated, and the raising / lowering of the car is permitted even when the door is open.

  When fire extinguishing work is performed using an emergency elevator, the fire fighting operation switch in the car is normally turned on. Therefore, the emergency elevator power control device according to the embodiment allows the control power to be supplied according to the operation of the fire-fighting operation switch in the car even when the control power-operating switch 15 at the landing is grounded. When a fire extinguishing work or the like is performed, the emergency elevator can be reliably operated. Below, the specific structural example of the power supply control apparatus of the emergency elevator of such embodiment is demonstrated in detail. In the following description, the same components as those in the above-described comparative example are denoted by the same reference numerals, and redundant description is omitted as appropriate.

<First Embodiment>
FIG. 2 is a configuration diagram of the power supply control device 20A of the first embodiment. As shown in FIG. 2, the power control device 20A of the present embodiment includes a control power supply circuit 21, a control power operation switch input circuit 22, a control power switching circuit 23, a fire fighting operation switch input circuit 24, and a fire fighting operation. Hour power control circuit 25.

  The fire-fighting operation switch input circuit 24 and the fire-fighting power control circuit 25 have a secondary side of an emergency transformer 27 whose primary side is connected to the secondary-side R-phase and S-phase of the main power breaker 2 via an emergency breaker 26. Connected in parallel to the side. That is, the fire-fighting operation switch input circuit 24 and the fire-fighting operation power control circuit 25 are configured to operate by being supplied with power from the secondary side of the emergency transformer 27. Between the secondary side of the emergency transformer 27 and the fire-fighting operation switch input circuit 24 and the fire-fighting power supply control circuit 25, an overcurrent should not flow in the fire-fighting operation switch input circuit 24 and the fire-fighting power supply control circuit 25. An emergency fuse 28 is provided.

  The control power supply circuit 21 has the same configuration as the control power supply circuit 101 in the power control apparatus 100 of the comparative example, and the contact 12 of the control power contactor 1SC is interposed between the main power supply 1 and the control power transformer 11. When the contact 12 of the control power contactor 1SC is connected and turned on, the control power is output from the secondary side of the control power transformer 11.

  The control power operation switch input circuit 22 has the same configuration as that of the control power operation switch input circuit 102 in the power control apparatus 100 of the comparative example, and the control power operation is performed between the main power 1 and the coil 13 of the control power relay 1SCR. The fuses 14a and 14b and the control power supply operation switch 15 at the hall are connected in series.

  The control power supply switching circuit 23 is connected to the contact point (a contact) 29a, 29b of the fire-fighting operation relay (electromagnetic relay) ESR with respect to the control power supply switching circuit 103 in the power supply control device 100 of the comparative example, and the contact 17a of the control power supply relay 1SCR. 17b is connected in parallel with each other. That is, the control power supply switching circuit 23 includes the contacts 17a and 17b of the control power supply relay 1SCR and the contacts 29a and 29b of the fire fighting operation relay ESR between the main power supply 1 and the coil 16 of the control power supply contactor 1SC. Connected in parallel. The contacts 29a and 29b of the fire-fighting operation relay ESR are turned on in response to at least one operation (ON operation) of a primary fire-fighting operation switch 31 and a secondary fire-fighting operation switch 33 described later.

  The fire fighting operation switch input circuit 24 connects the secondary side of the emergency transformer 27 and the coil 30 of the primary fire fighting operation switch input relay (electromagnetic relay) 1 EKR via the primary fire fighting operation switch 31 in the car, The secondary side of the emergency transformer 27 and the secondary fire fighting operation switch input relay (electromagnetic relay) 2EKR coil 32 are connected via a secondary fire fighting operation switch 33 in the car. That is, the fire fighting operation switch input circuit 24 is connected between the main power source 1 and the coil 30 of the primary fire fighting operation switch input relay 1 EKR and the coil 32 of the secondary fire fighting operation switch input relay 2 EKR. 31 and a secondary fire fighting operation switch 33 are connected.

  The power control circuit 25 at the time of fire-fighting operation connects the secondary side of the emergency transformer 27 and the coil 34 of the fire-fighting operation relay ESR to the contact (a contact) 35 of the primary fire-fighting operation switch input relay 1 EKR and the secondary fire-fighting operation switch input. It is the structure connected via the contact (a contact) 36 of the relay 2EKR. The contact point 35 of the primary fire fighting operation switch input relay 1 EKR and the contact point 36 of the secondary fire fighting operation switch input relay 2 EKR are connected in parallel between the secondary side of the emergency transformer 27 and the coil 34 of the fire fighting operation relay ESR. Yes. That is, the power control circuit 25 for fire fighting operation has a contact 35 of the primary fire fighting operation switch input relay 1 EKR and a contact 36 of the secondary fire fighting operation switch input relay 2 EKR between the main power source 1 and the coil 34 of the fire fighting operation relay ESR. Is connected.

  In the power supply control device 20A of the present embodiment configured as described above, if the control power supply operation switch 15 at the landing is not in a ground fault, the control power supply operation switch is the same as the power supply control device 100 of the comparative example. In response to the ON operation of 15, the control power is output from the secondary side of the control power transformer 11. Further, in the power control device 20A of the present embodiment, even if the control power operation switch 15 at the landing is in a ground fault state, at least one of the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33 in the car is on. When operated, the control power is output from the secondary side of the control power transformer 11.

  That is, when the primary fire fighting operation switch 31 is turned on, the coil 30 of the primary fire fighting operation switch input relay 1 EKR is energized and excited, thereby turning on the contact 35 of the primary fire fighting operation switch input relay 1 EKR. . When the secondary fire fighting operation switch 33 is turned on, the coil 32 of the secondary fire fighting operation switch input relay 2EKR is energized and excited, thereby turning on the contact 36 of the secondary fire fighting operation switch input relay 2EKR. . When at least one of the contact point 35 of the primary fire-fighting operation switch input relay 1 EKR and the contact point 36 of the secondary fire-fighting operation switch input relay 2 EKR is turned on, the coil 34 of the fire-fighting operation relay ESR is energized and excited, thereby The contacts 29a and 29b of the operation relay ESR are turned on. Accordingly, even if the coil 13 of the control power supply relay 1SCR is not energized due to the ground fault of the control power supply operation switch 15 at the hall, even if the contacts 17a and 17b of the control power supply relay 1SCR are not turned on, the fire fighting operation relay When the ESR contacts 29a and 29b are turned on, the coil 16 of the control power contactor 1SC is energized and excited. As a result, the contact 12 of the control power contactor 1SC is turned on, and the control power is output from the secondary side of the control power transformer 11.

  FIG. 3 is a timing chart for explaining the operation of the power supply control device 20A of the present embodiment as described above. As shown in FIG. 3, when the control power operation switch 15 at the landing is grounded, for example, by spraying fire extinguishing water, the contacts 17 a and 17 b of the control power relay 1SCR are not turned on even when the control power operation switch 15 is turned on. The control power is not supplied because the contact 12 of the control power contactor 1SC is not turned on. However, when the primary fire fighting operation switch 31 or the secondary fire fighting operation switch 33 (shown as “fire fighting operation switch” in FIG. 3) is turned on, the primary fire fighting operation switch input relay 1 EKR or the secondary fire fighting operation switch input relay 2 EKR. The contacts 35 and 36 of the fire fighting operation switch input relay (shown in FIG. 3) are turned on, and the contacts 29a and 29b of the fire fighting operation relay ESR are turned on. As a result, even when the contacts 17a and 17b of the control power relay 1SCR are turned off, the contact 12 of the control power contact 1SC is turned on, and the control power is supplied from the secondary side of the control power transformer 11 Is output.

  As described above, according to the power supply control device 20A of the present embodiment, even when the landing control power supply operation switch 15 is grounded due to spraying of fire-extinguishing water, etc., the primary fire fighting operation switch 31 in the car. Alternatively, the control power can be supplied by operating the secondary fire fighting operation switch 33. Therefore, the emergency elevator can be reliably operated when a fire fighting operation is performed by the fire brigade.

  Note that the power supply control device 20A of the present embodiment includes contacts 29a and 29b of the fire fighting operation relay ESR as an example of contacts that are turned on in response to at least one operation of the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33. It is connected in parallel with the contacts 17a and 17b of the control power supply relay 1SCR. However, the contact connected in parallel with the contacts 17a and 17b of the control power supply relay 1SCR may be any contact that turns on in response to at least one operation of the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33. It is not restricted to the contacts 29a and 29b of the operation relay ESR. For example, the contact 35 of the primary fire-fighting operation switch input relay 1 EKR and the contact 36 of the secondary fire-fighting operation switch input relay 2 EKR are arranged in parallel with the contacts 17 a and 17 b of the control power relay 1 SCR without providing the power control circuit 25 during fire-fighting operation. It is good also as a structure connected to.

<Second Embodiment>
FIG. 4 is a configuration diagram of the power supply control device 20B of the second embodiment. In the power supply control device 20B of the present embodiment, as shown in FIG. 4, the coil 40 of the second fire fighting operation relay (electromagnetic relay) ESR2 is provided in parallel with the coil 34 of the fire fighting operation relay ESR in the power control circuit 25 during fire fighting operation. Connected. In addition, the contacts (a contacts) 41a and 41b of the second fire fighting relay ESR2 are connected in parallel with the contacts 29a and 29b of the fire fighting relay ESR in the control power supply switching circuit 23. That is, in this embodiment, in addition to the contacts 29a and 29b of the fire-fighting operation relay ESR, the second fire-fighting operation relay is used as a contact that turns on in response to at least one operation of the primary fire-fighting operation switch 31 and the secondary fire-fighting operation switch 33. ESR2 contacts 41a and 41b are provided. The contacts 29a and 29b of the fire fighting operation relay ESR and the contacts 41a and 41b of the second fire fighting operation relay ESR2 are connected in parallel with the contacts 17a and 17b of the control power supply relay 1SCR, respectively. Other configurations of the power supply control device 20B of the present embodiment are the same as those of the power supply control device 20A of the first embodiment described above.

  In the power supply control device 20B of the present embodiment, for example, even if an off failure such as disconnection of the coil 34 occurs in the fire fighting operation relay ESR, if the second fire fighting operation relay ESR2 is healthy, the primary fire fighting operation switch 31 Since the contacts 41a and 41b of the second fire-fighting operation relay ESR2 are turned on in response to the turning-on operation of at least one of the secondary fire-fighting operation switch 33, it is possible to supply the control power and operate the emergency elevator. On the other hand, even if an off failure such as a disconnection of the coil 40 occurs in the second fire fighting operation relay ESR2, if the fire fighting operation relay ESR is healthy, the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33 Since the contacts 29a and 29b of the fire-fighting operation relay ESR are turned on in response to at least one of the turning-on operations, the emergency elevator can be operated with supply of control power. It is extremely rare that a double failure occurs between the fire-fighting operation relay ESR and the second fire-fighting operation relay ESR2, and according to the power supply control device 20B of this embodiment, one of the fire-fighting operation relay ESR and the second fire-fighting operation relay ESR2 The emergency elevator can be operated even when an off-failure occurs.

<Third Embodiment>
FIG. 5 is a configuration diagram of a power supply control device 20C according to the third embodiment. In the power supply control device 20C of this embodiment, the coil 40 of the second fire fighting operation relay ESR2 is connected in parallel with the coil 34 of the fire fighting operation relay ESR in the power control circuit 25 during fire fighting operation, as in the second embodiment. ing. Further, the contacts 41a and 41b of the second fire fighting operation relay ESR2 are connected in series to the contacts 29a and 29b of the fire fighting operation relay ESR in the control power supply switching circuit 23. That is, in this embodiment, in addition to the contacts 29a and 29b of the fire-fighting operation relay ESR, the second fire-fighting operation relay is used as a contact that turns on in response to at least one operation of the primary fire-fighting operation switch 31 and the secondary fire-fighting operation switch 33. ESR2 contacts 41a and 41b are provided. The contacts 41a and 41b of the second fire fighting relay ESR2 are connected in series to the contacts 29a and 29b of the fire fighting relay ESR connected in parallel with the contacts 17a and 17b of the control power relay 1SCR. Other configurations of the power control device 20C of the present embodiment are the same as those of the power control device 20A of the first embodiment described above.

  In the power supply control device 20C of the present embodiment, for example, even if an ON failure such as welding of the contacts 29a and 29b occurs in the fire fighting operation relay ESR, if the second fire fighting operation relay ESR2 is healthy, the primary fire fighting operation When both the switch 31 and the secondary fire fighting operation switch 33 are turned off, the contacts 41a and 41b of the second fire fighting operation relay ESR2 are turned off, so that the control power supply can be cut off and the operation of the emergency elevator can be stopped. . On the other hand, even if an ON failure such as welding of the contacts 41a and 41b occurs in the second fire fighting operation relay ESR2, if the fire fighting operation relay ESR is healthy, the primary fire fighting operation switch 31 and the secondary fire fighting operation switch When both of the switches 33 are turned off, the contacts 29a and 29b of the fire-fighting operation relay ESR are turned off, so that the supply of control power can be cut off and the operation of the emergency elevator can be stopped. It is extremely rare that a double failure occurs between the fire-fighting operation relay ESR and the second fire-fighting operation relay ESR2, and in the power supply control device 20C of this embodiment, one of the fire-fighting operation relay ESR and the second fire-fighting operation relay ESR2 is on-failed. Even so, the operation of the emergency elevator can be stopped according to the turning-off operation of the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33, and the safety of the worker can be ensured.

<Fourth Embodiment>
FIG. 6 is a configuration diagram of a power supply control device 20D of the fourth embodiment. In the power supply control device 20D of the present embodiment, as shown in FIG. 6, the state of the first EKR contact signal indicating the state of the contact 35 of the primary fire fighting operation switch input relay 1EKR and the state of the contact 36 of the secondary fire fighting operation switch input relay 2EKR are changed. The 2 EKR contact signal that represents the signal and the ESR contact signal that represents the state of the contacts 29 a and 29 b of the fire-fighting relay ESR are input to the control microcomputer 9. Then, the control microcomputer 9 executes processing for detecting inconsistency between the 1 EKR contact signal, the 2 EKR contact signal, and the ESR contact signal (detection means), and if an inconsistency is detected, an error code is registered and an error is detected. Make a report. Other configurations of the power control device 20D of the present embodiment are the same as those of the power control device 20A of the first embodiment described above.

  FIG. 7 is a flowchart showing an example of processing for detecting a mismatch of contact signals executed by the control microcomputer 9 in the power supply control device 20D of the present embodiment. In the present embodiment, the control microcomputer 9 detects a contact signal mismatch in a state where the control power is supplied to the control microcomputer 9 in response to the ON operation of the control power supply operation switch 15 at the hall. It is assumed to be executed.

  First, in step S101, the control microcomputer 9 inputs a 1 EKR contact signal, a 2 EKR contact signal, and an ESR contact signal. In step S102, the control microcomputer 9 determines whether or not the 1 EKR contact signal or the 2 EKR contact signal is on, that is, the contact 35 of the primary fire fighting operation switch input relay 1 EKR or the secondary fire fighting operation switch input relay 2 EKR. It is determined whether or not the contact 36 is in an ON state.

  Here, if the 1 EKR contact signal or the 2 EKR contact signal is on (step S102: Yes), the control microcomputer 9 next determines whether or not the ESR contact signal is on in step S103, that is, It is determined whether or not the contacts 29a and 29b of the fire-fighting operation relay ESR are on. If the ESR contact signal is on (step S103: Yes), the control microcomputer 9 determines in step S104 that the fire-fighting relay ESR is operating normally, and ends the process.

  On the other hand, if the ESR contact signal is off (step S103: No), the control microcomputer 9 determines in step S105 that an off failure has occurred in the fire-fighting operation relay ESR. Then, in step S106, the control microcomputer 9 registers an error code indicating an off failure of the fire-fighting operation relay ESR. In step S107, the control microcomputer 9 terminates the process after issuing an abnormality.

  If both the 1 EKR contact signal and the 2 EKR contact signal are off in step S102 (step S102: No), the control microcomputer 9 next determines in step S108 whether or not the ESR contact signal is off. To do. If the ESR contact signal is off (step S108: Yes), the control microcomputer 9 determines in step S109 that the fire-fighting relay ESR is operating normally, and ends the process.

  On the other hand, if the ESR contact signal is on (step S108: No), the control microcomputer 9 determines in step S110 that an on failure has occurred in the fire-fighting operation relay ESR. Then, in step S111, the control microcomputer 9 registers an error code indicating an on failure of the fire-fighting operation relay ESR. In step S112, the control microcomputer 9 terminates the process after issuing an abnormality report.

  As described above, according to the power supply control device 20D of the present embodiment, the control microcomputer 9 executes the process of detecting the mismatch between the 1 EKR contact signal and the 2 EKR contact signal and the ESR contact signal, and the mismatch is detected. In this case, since an error code is registered and an abnormality is issued, when an abnormality such as a failure of the fire-fighting operation relay ESR occurs, the abnormality can be recognized by maintenance personnel.

<Fifth Embodiment>
FIG. 8 is a configuration diagram of a power supply control device 20E of the fifth embodiment. In the present embodiment, a safety circuit operation switch 46 for operating the elevator safety circuit 45 is further provided in addition to the above-described control power operation switch 15 on the back side of the floor display of the hall. The power supply control device 20E of the present embodiment enables power supply to the safety circuit 45 even when the safety circuit operation switch 46 is grounded due to spraying of fire-extinguishing water, etc., during operation of the emergency elevator. The safety circuit 45 is prevented from being inadvertently interrupted.

  In the power supply control device 20E of the present embodiment, as shown in FIG. 8, a control power supply fuse 47 and a safety circuit operation switch power supply fuse 48 are connected in parallel to the secondary side of the control power supply transformer 11. . The control power is supplied from the secondary side of the control power transformer 11 via the control power fuse 47 and the safety circuit operation switch power is supplied via the safety circuit operation switch power fuse 48. Yes. In addition to the configuration of the power control device 20A of the first embodiment described above, the power control device 20E of the present embodiment is supplied with a safety circuit operation circuit 49 to which a safety circuit operation switch power is supplied, and a control power supply. The safety circuit power supply circuit 50 is provided. Other configurations of the power control device 20E of the present embodiment are the same as those of the power control device 20A of the first embodiment described above.

  The safety circuit operation circuit 49 is provided between the secondary side of the control power transformer 11 and the coil 51 of the safety circuit operation relay (electromagnetic relay) CCSR and the safety circuit operation switch power supply fuse 48 and the safety of the landing. The circuit operation switch 46 is connected in series.

  The safety circuit power supply circuit 50 includes a contact (a contact) 52 of the safety circuit operation relay CCSR and a contact (a of the fire-fighting operation relay ESR) between the secondary side of the control power transformer 11 and the safety circuit 45. Contact) 53 is connected in parallel.

  In the power supply control device 20E of the present embodiment configured as described above, if the safety circuit operation switch 46 at the landing is not in a ground fault, the safety circuit operation relay CCSR is turned on by turning on the safety circuit operation switch 46. When the coil 51 is energized and excited, the contact 52 of the safety circuit operation relay CCSR is turned on. As a result, control power is supplied to the safety circuit 45. Further, in the power supply control device 20E of the present embodiment, at least one of the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33 in the car is on even when the safety circuit operation switch 46 at the landing is grounded. When operated, the coil 34 of the fire-fighting operation relay ESR is energized and excited as in the first embodiment, and the contact 53 of the fire-fighting operation relay ESR is turned on. As a result, control power is supplied to the safety circuit 45.

  As described above, according to the power supply control device 20E of the present embodiment, even if the safety circuit operation switch 46 at the landing is grounded due to spraying of fire extinguishing water or the like, the primary fire fighting operation switch 31 in the car or By operating the secondary fire-fighting operation switch 33, it is possible to supply power to the safety circuit 45, and it is possible to effectively prevent the safety circuit 45 from being inadvertently interrupted during operation of the emergency elevator.

<Sixth Embodiment>
FIG. 9 is a configuration diagram of a power supply control device 20F of the sixth embodiment. In the power supply control device 20F of the present embodiment, as shown in FIG. 9, the contact of the fire-fighting operation relay ESR with respect to the control power supply operation fuses 14a and 14b of the control power supply operation switch input circuit 22 and the control power supply operation switch 15 at the landing. (B contacts) 55a and 55b are connected in series. The contacts 55a and 55b of the fire-fighting operation relay ESR are turned off in response to at least one operation (ON operation) of the primary fire-fighting operation switch 31 and the secondary fire-fighting operation switch 33. Other configurations of the power supply control device 20F of the present embodiment are the same as those of the power supply control device 20A of the first embodiment described above.

  In the power supply control device 20F of the present embodiment, when at least one of the primary fire fighting operation switch 31 and the secondary fire fighting operation switch 33 in the car is turned on, the contact of the fire fighting operation relay ESR in the control power operation switch input circuit 22 Since 55a and 55b are turned off, the control power operation switch input circuit 22 is disconnected. Accordingly, it is possible to more effectively prevent an overcurrent from flowing due to a ground fault of the control power supply operation switch 15 at the hall and adversely affecting other circuits.

  According to the power control device for an emergency elevator according to at least one embodiment described above, even if the control power operation switch at the landing is grounded, the control power is controlled according to the operation of the fire fighting operation switch in the car. The emergency elevator can be reliably operated when fire extinguishing work or the like is performed by the fire brigade.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 Main power supply, 9 Control microcomputer, 11 Control power supply transformer, 12 Contact of control power supply contactor 1SC, 13 Coil of control power supply relay 1SCR, 14a, 14b Control power supply operation fuse, 15 Control power supply operation switch, 16 Control power contactor 1SC coil, 17a, 17b Control power relay 1SCR contact, 20A-20F power control device, 21 control power supply circuit, 22 control power operation switch input circuit, 23 control power supply switching circuit, 24 fire fighting operation Switch input circuit, 25 Power control circuit during fire-fighting operation, 27 Emergency transformer, 29a, 29b Contact of fire-fighting operation relay ESR, 30 Primary fire-fighting operation switch Input relay 1 EKR coil, 31 Primary fire-fighting operation switch, 32 Secondary fire-fighting Coil of operation switch input relay 2EKR, 33 secondary Safety operation switch, 34 Coil of fire fighting operation relay ESR, 35 Primary fire operation switch input relay 1 EKR contact, 36 Secondary fire operation switch input relay 2 EKR contact, 41 a, 41 b Second fire operation relay ESR 2 contact, 45 Safety Circuit, 46 Safety circuit operation switch, 48 Safety circuit operation switch Power supply fuse, 49 Safety circuit operation circuit, 50 Safety circuit power supply circuit, 51 Safety circuit operation relay CCSR coil, 52 Safety circuit operation relay CCSR Contact, 53 Contact of fire-fighting relay ESR, 55a, 55b Contact of fire-fighting relay ESR (b contact)

Claims (10)

A power control device for an emergency elevator, in which a control power operation switch for operating the control power of the elevator is provided at the landing, and a fire fighting operation switch for switching the elevator control mode to the fire fighting operation mode is provided in the car,
A control power supply circuit for connecting a contact of a control power contactor between the main power supply and the primary side of the control power transformer and outputting the control power from the secondary side of the control power transformer when the contact is turned on When,
A control power supply operation switch input circuit in which a control power supply operation fuse and the control power supply operation switch are connected in series between the main power supply and the coil of the control power supply relay;
A control power supply switching circuit in which a contact of the control power relay and a contact turned on in response to an operation of the fire fighting operation switch are connected in parallel between the main power supply and the coil of the control power contactor A power control apparatus for an emergency elevator, comprising: A fire fighting operation switch input circuit in which the fire fighting operation switch is connected between the main power supply and a coil of the fire fighting operation switch input relay;
A fire-fighting operation power control circuit in which a contact of the fire-fighting operation switch input relay is connected between the main power supply and the coil of the fire-fighting operation relay;
The emergency elevator power control device according to claim 1, wherein the contact point that is turned on in response to the operation of the fire fighting operation switch is a contact point of the fire fighting operation relay.   The fire fighting operation switch input circuit and the fire fighting operation power supply control circuit are connected in parallel to a secondary side of an emergency transformer whose primary side is connected to the main power source. Emergency elevator power control device.   The apparatus further comprises detection means for detecting a mismatch between the first contact signal indicating the contact state of the fire-fighting operation switch input relay and the second contact signal indicating the contact state of the fire-fighting operation relay. The power control device for an emergency elevator according to claim 2 or 3. The fire fighting operation switch includes a primary fire fighting operation switch and a secondary fire fighting operation switch,
The contact point that is turned on in response to an operation of the fire fighting operation switch is turned on when at least one of the primary fire fighting operation switch and the secondary fire fighting operation switch is operated. The power control device for an emergency elevator according to one item.   6. The emergency elevator power control apparatus according to claim 1, wherein the contacts that are turned on in response to an operation of the fire fighting operation switch include a plurality of contacts that are connected in parallel. 7.   6. The emergency elevator power control apparatus according to claim 1, wherein the contacts that are turned on in response to an operation of the fire fighting operation switch include a plurality of contacts connected in series. A safety circuit operation switch for operating the safety circuit of the elevator is further provided in the hall,
A safety circuit operation circuit in which a safety circuit operation switch power supply fuse and the safety circuit operation switch are connected in series between a secondary side of the control power transformer and a coil of a safety circuit operation relay;
Between the secondary side of the control power transformer and the safety circuit, the contact of the relay for operating the safety circuit and the contact that turns on in response to the operation of the fire fighting operation switch are connected in parallel. A power supply circuit for an emergency elevator according to any one of claims 1 to 7, further comprising a power supply circuit.   The contact which turns off in response to the operation of the fire fighting operation switch is further connected in series to the control power operation fuse of the control power operation switch input circuit and the control power operation switch. The power control apparatus for an emergency elevator according to any one of 1 to 8. A power control device for an emergency elevator, in which a control power operation switch for operating the control power of the elevator is provided at the landing, and a fire fighting operation switch for switching the elevator control mode to the fire fighting operation mode is provided in the car,
A power control device for an emergency elevator, wherein a contact that is turned on in response to an operation of the fire fighting operation switch is connected in parallel to a contact that is turned on in response to an operation of the control power operation switch.

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