JP2018008760A - Elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safer elevator having a simple configuration and enabling detection of abnormality (failure) of a power source and/or a relay of the elevator.SOLUTION: An elevator includes a controlled body 36 and a power supply circuit for supplying electric power to the controlled body 36. The power supply circuit includes: a controlled body power source 37 for supplying electric power to the controlled body 36; a relay section 38 for controlling electric power supply to the controlled body 36; a signal detection section 35 for detecting a state of the relay section 38; a first power source 33; a second power source 34; and a monitoring section 31 for monitoring both of the power sources 33, 34. The relay section 38 includes: a first relay RY1 driven by being supplied with electric power from the first power source 33; and a third relay RY3 being connected in series to the first relay RY1 and driven by being supplied with electric power from the second power source 34. The monitoring section 31 drives both of the relays RY1, RY3, respectively, and monitors states of both of the power sources 33, 34.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an elevator using a relay for power supply control to a drive unit.

  In order to ensure the safe operation of the elevator, various safety devices are provided. As this type of background art, there is JP 2013-142038 A (Patent Document 1). In this patent document, in an elevator, a car operated by a driving force generated by a motor, a controller for controlling the operation of the car, a safety device for stopping the operation of the car, and a safety device are operated. A power supply control device that controls the supply of power to be controlled, and an electronic controller that performs control by diagnosing the operation of the power supply control device. The elevator which diagnoses the operation | movement of an electric power supply control device in the period until is shown.

JP 2013-142038 A

  However, in the elevator described in Patent Document 1, no consideration has been given to the detection (abnormality) of the control power supply.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an elevator with higher safety by detecting an abnormality (failure) in a power source and / or relay of an elevator with a simple configuration.

  In order to achieve the above object, an elevator according to the present invention is an elevator including a controlled body and a power supply circuit that supplies power to the controlled body and controls the operation of the controlled body. A controlled body power supply for supplying power to the controlled body, a relay section for controlling power supply from the controlled body power supply to the controlled body, and a signal detection section for detecting a state of the relay section; A first power source; a second power source independent of the first power source; and a monitoring unit that monitors the first power source and the second power source, wherein the relay unit includes the first power source. A first relay that is driven by power supplied from one power source, and a third relay that is connected in series to the first relay and driven by power supplied from the second power source, The monitoring unit includes the first relay and the Third relay respectively driven, is characterized by monitoring the state of the first power supply and said second power supply.

  According to the present invention, it is possible to detect an abnormality (failure) in the power supply and / or relay of the elevator with a simple configuration, and the safety of the elevator can be further improved. Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

1 is an overall view showing a configuration of an embodiment of an elevator according to the present invention. It is a figure which shows the structure of the power supply circuit of the control panel of embodiment of this invention. It is a functional block diagram of the control microcomputer of the embodiment of the present invention. It is a flowchart of the failure detection process by the control microcomputer of embodiment of this invention.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the elevator which concerns on this invention is demonstrated based on figures.

  FIG. 1 is an overall view showing a configuration of an embodiment of an elevator according to the present invention. The figure schematically shows only the lowermost floor and the uppermost floor among the floors of the building 11 in which the elevator 101 according to the present embodiment is installed. However, in the present embodiment, the building 11 has two or more floors. The present invention can be applied to the elevator 101 that is installed.

  The elevator 101 according to the present embodiment includes a hoistway 12 formed in the building 11, a car 13 that moves up and down in the hoistway 12 of the building 11, a main rope 14 that has one end attached to the car 13, The other end of the main rope 14 is attached, and the counterweight 15 is suspended in the hoistway 12.

  The elevator 101 is provided in a machine room 16 located above the hoistway 12, and a hoisting machine 17 that drives the car 13 and the counterweight 15, and a deflector disposed near the hoisting machine 17. A car 18 and a landing door 20 that can be opened and closed on the landing 19 side of the building 11 and that opens and closes the door in conjunction with a car door (not shown) of the car 13, and is installed in the machine room 16 And a control panel 30 as a control device for controlling the operation of the car 13.

  The hoisting machine 17 includes a drive sheave 171 around which the main rope 14 is wound, a motor 172 that rotates the drive sheave 171, and a brake device 36 as a controlled body that brakes the rotation of the drive sheave 171 (see FIG. 2). The motor 172 and the brake device 36 are electrically connected to the control panel 30. Accordingly, the hoisting machine 17 operates the motor 172 and the brake device 36 in response to a control command from the control panel 30 to raise and lower the car 13 relative to the counterweight 15.

  Although not shown, the control panel 30 stores a CPU (Central Processing Unit) for performing various calculations for performing the raising / lowering operation of the car 13 and the opening / closing operation of the car door, and a program for executing the calculation by the CPU. Hardware including a storage device such as a ROM (Read Only Memory) and a HDD (Hard Disk Drive), and a RAM (Random Access Memory) serving as a work area when the CPU executes a program, and stored in the storage device The software is executed by

  In such a configuration of the control panel 30, a program or the like stored in a storage device such as a ROM or HDD is read into the RAM, and operates according to the control of the CPU, so that the software and hardware cooperate, Functional blocks for realizing each function of the control panel 30 are configured. The control panel 30 of the present embodiment includes, for example, a power supply circuit that supplies electric power to the brake device 36 and the like given as an example of a controlled body and controls the operation of the brake device 36 and the like. A specific configuration of the power supply circuit of the control panel 30 will be described later in detail.

  On the other hand, the control panel 30 is electrically connected to the equipment of the car 13 via a tail cord 23, a repeater 24, and a communication cable 25 disposed in the hoistway 12. The tail cord 23 has one end connected to the lower part of the car 13 and the other end connected to the repeater 24, and is suspended in a U shape in the hoistway 12. The repeater 24 is a device that is fixed to the wall surface of the hoistway 12 and relays communication performed between each device of the car 13 and the control panel 30.

  Next, the configuration of the power supply circuit of the control panel 30 for driving the equipment of the elevator 101 including the brake device 36 cited as an example of the controlled body according to the present embodiment will be described in detail with reference to FIG. .

  FIG. 2 is a diagram showing the configuration of the power supply circuit of the control panel 30 according to the present embodiment.

  As shown in FIG. 2, the power supply circuit of the control panel 30 includes a controlled body power supply (brake drive power supply) 37 that supplies power to the controlled body (brake device) 36, and a brake drive power supply 37 to the brake device 36. A relay unit 38 that controls power supply, a relay control unit 32 that controls the operation of the relay unit 38, a signal detection unit 35 that detects the state of the relay unit 38, a first power source 33, and a first power source 33. And a control microcomputer 31 that controls the operation of each component of the control panel 30, including the relay control unit 32 and the signal detection unit 35.

  The relay unit 38 includes a plurality of relays that supply and cut off electric power from the brake drive power supply 37 to the brake device 36. In the present embodiment, a first series connection body 381 including two or more relays connected in series and a second series connection body 382 including two or more relays connected in series are provided. The first series connection body 381 and the second series connection body 382 are connected in parallel between the brake drive power supply 37 and the brake device 36 to form a so-called bridge circuit.

  Hereinafter, the first relay RY1 and the third relay RY3 are connected in series as the first series connection body 381, and the second relay RY2 and the fourth relay RY4 are connected in series as the second series connection body 382. An example of the case of being connected to will be described. In addition, when it is not necessary to distinguish in particular, these are collectively called the relay RY.

  The relay control unit 32 includes a relay driving unit that drives the relay RY for each relay RY. That is, the first drive unit 321 that drives the first relay RY1, the second drive unit 322 that drives the second relay RY2, the third drive unit 323 that drives the third relay, And a fourth drive unit 324 that drives the four relays. In addition, when it is not necessary to distinguish these, the drive part 320 is named generically.

  In the present embodiment, the first relay RY1, the second relay RY2, the third relay RY3, and the fourth relay RY4 are each driven by the corresponding drive unit 320 of the relay control unit 32 in accordance with a command from the control microcomputer 31. Driven. Specifically, each is controlled to either an ON state in which power is supplied or an OFF state in which power is cut off.

  Usually, the first series connection body 381 and the second series connection body 382 are switched and used alternately every time the elevator 101 is operated. At this time, when the supply voltage from the first power supply 33 and the second power supply 34 decreases, each drive unit 320 cannot be driven, and accordingly, the ON / OFF operation of each relay RY cannot be performed.

  In order to detect the voltage drop of these power supplies, in the control panel 30 of this embodiment, the power supply which supplies electric power to each drive part 320 is divided | segmented into two. Specifically, the first drive unit 321 and the second drive unit 322 are supplied from the first power supply 33, and the third drive unit 323 and the fourth drive unit 324 are supplied from the second power supply 34, Each is configured to supply power.

  The first power supply 33 is connected to, for example, the control microcomputer 31, the relay control unit 32, the signal detection unit 35, and the like in addition to the first drive unit 321 and the second drive unit 322, and supplies power thereto. The first power source 33 is, for example, a DC 24V signal circuit power source. Hereinafter, the first power supply 33 is referred to as a control means power supply 33.

  The second power source 34 is connected to, for example, an external switch in addition to the third drive unit 323 and the fourth drive unit 324, and supplies power thereto. The second power source 34 is, for example, a direct current 48V circuit power source. Hereinafter, the second power supply 34 is referred to as a relay drive power supply 34.

  The signal detector 35 detects contact signals from the first relay RY1, the second relay RY2, the third relay RY3, and the fourth relay RY4 that form a bridge circuit, and determines the ON / OFF state of each. To detect.

  The control microcomputer 31 of the present embodiment uses these parts to provide the first relay RY1, the second relay RY2, the third relay RY3, the fourth relay RY4, the control means power supply 33, and the relay drive power supply 34. Functions as a monitoring unit for monitoring.

  In order to realize this, as shown in FIG. 3, the control microcomputer 31 of the present embodiment includes an ON / OFF command unit 311, a relay state determination unit 312, a power supply state determination unit 313, a control command unit 314, Is provided. With these units, the control microcomputer 31 of the present embodiment executes a failure detection process for detecting a failure of the relay unit 38, the control unit power source 33, and the relay drive power source 34 as a monitoring unit.

  The ON / OFF command unit 311 turns each relay RY on / off according to a predetermined procedure. In the present embodiment, an instruction is given to the relay control unit 32, and the relay control unit 32 turns each relay RY ON / OFF.

  Relay state determination unit 312 determines the ON / OFF state of each relay RY. In this embodiment, according to the contact signal detected by the signal detection unit 35, it is determined whether it is in an ON state or an OFF state.

  The power supply state determination unit 313 determines the states of the control unit power supply 33 and the relay drive power supply 34 according to the state of each relay RY determined by the relay state determination unit 312.

  The control command unit 314 determines the situation according to the state of each relay RY and the state of each power source determined by the relay state determination unit 312 and the power supply state determination unit 313, and controls the operation of the car 13 of the elevator 101. Outputs a command. For example, the elevator control unit 39 provided in the control panel 30 issues a command to the elevator operation controller 39 that controls the elevator operation of the car 13 via the motor 172, the brake device 36, and the like.

  As described above, each function of performing the failure detection process of the control microcomputer 31 is realized by the CPU loading the program stored in the storage device or the like included in the control panel 30 into the memory and executing it. Note that all or some of the functions may be realized by hardware such as an application specific integrated circuit (ASIC) or a field-programmable gate array (FPGA).

  Various data used for processing of each function and various data generated during the processing are stored in a memory or a storage device.

  Hereinafter, the flow of failure detection processing by each part of the control microcomputer 31 will be described. FIG. 4 is a process flow of the failure detection process of the present embodiment. The failure detection process is executed at predetermined time intervals. Alternatively, it is executed by an instruction from a user such as an operator who performs maintenance / inspection of the elevator 101. At the start of the failure detection process, each relay RY is turned off.

  First, an instruction is given to turn on the relay of the first series connection body 381. Specifically, the ON / OFF command unit 311 outputs an ON command to the first drive unit 321 and the third drive unit 323, and turns on the first relay RY1 and the third relay RY3, respectively ( Step S101).

  The relay state determination unit 312 determines whether or not the first relay RY1 and the third relay RY3 are turned on (step S102). The determination is made based on whether or not a contact signal is detected by the signal detection unit 35 as described above.

  If it is determined that both the first relay RY1 and the third relay RY3 are in the ON state, the process ends. This is because both the control means power supply 33 and the relay drive power supply 34 connected to the relays RY1 and RY3 and the first drive part 321 and the third drive part 323 that drive the relays RY1 and RY3, respectively, are normal. It is because it shows.

  On the other hand, when it is determined that at least one is in the OFF state, the relay state determination unit 312 stores the determination result as a first determination result (step S103). Here, as a first determination result, only the first relay RY1 is OFF, only the third relay RY3 is OFF, and both the first relay RY1 and the third relay RY3 are OFF. One of the three states is stored. The first determination result is stored in, for example, a memory or a storage device.

  Next, the ON / OFF command unit 311 turns off the first relay RY1 and the third relay RY3 (step S104).

  Next, the relay of the second series connection body 382 is instructed to be turned on. Specifically, the ON / OFF command unit 311 outputs an ON command to the second drive unit 322 and the fourth drive unit 324, and turns on the second relay RY2 and the fourth relay RY4, respectively ( Step S105).

  Next, the relay state determination unit 312 determines the ON / OFF state of the second relay RY2 and the fourth relay RY4 (step S106). The determination is made based on whether or not a contact signal is detected by the signal detection unit 35 as described above.

  The relay state determination unit 312 stores the determination result as a second determination result (step S107). Here, the state where both the second relay RY2 and the fourth relay RY4 are ON, the state where only the second relay RY2 is OFF, the state where only the fourth relay RY4 is OFF, and the second relay It stores which of the four states, RY2 and fourth relay RY4 are both OFF. The second determination result is stored in, for example, a memory or a storage device.

  The power supply state determination unit 313 determines the states of the control means power supply 33 and the relay drive power supply 34 from the first determination result and the second determination result (step S108).

  Specifically, when both the first relay RY1 and the second relay RY2 are OFF, it is determined that the voltage of the control means power source 33 that drives them is lowered. Further, when both the third relay RY3 and the fourth relay RY4 are OFF, it is determined that the voltage of the relay drive power source 34 that drives them is lowered.

  Therefore, when all the relays RY are OFF, it is determined that both the voltages of the control means power supply 33 and the relay drive power supply 34 are lowered.

  On the other hand, in other cases, that is, in a case other than the above combination, when the relay RY is OFF, it is determined that the relay RY is out of order. For example, when any one of the relays RY is OFF, the first relay RY1 and the third relay RY3 are OFF, but when the second relay RY2 and the fourth relay RY4 are ON, Alternatively, the second relay RY2 and the fourth relay RY4 are OFF, but the first relay RY1 and the third relay RY3 are ON.

  The control command unit 314 outputs a command to perform predetermined control according to the determination result of the power supply state determination unit 313 (step S109). Here, for example, when it is determined that there is no voltage drop in the power supply and the relay RY is out of order, a command is issued to stop the car 13 of the elevator 101 at the nearest floor. If it is determined that the voltage of at least one of the control means power supply 33 and the relay drive power supply 34 has dropped, a command is issued to stop the car 13 of the elevator 101 on the spot.

  When the above process is completed, the control microcomputer 31 ends the process.

  In the failure detection process, the first series connection body 381 is first instructed to be in the ON state and the determination process is performed. However, the second series connection body 382 is first set to the ON state. It may be instructed to perform the discrimination process.

  As described above, in the elevator 101 of the present embodiment, the power source that supplies power for driving the plurality of relays RY connected in series is divided into two. Moreover, the signal detection part 35 which detects the ON / OFF state of each relay from a contact signal is provided.

  At the time of failure diagnosis, each relay group connected in series is driven, and each ON / OFF state is detected to determine whether the relay is in failure or whether the voltage of each power supply is reduced.

  Since it has such a configuration, according to this embodiment, it is possible to easily detect abnormality (failure) of the power source and / or the relay by using a simple configuration in which the control power source is divided into two.

  Further, the signal detection unit 35 of the present embodiment includes a first series connection body 381 driven by the control means power supply 33 and the relay drive power supply 34, and a second drive driven by the control means power supply 33 and the relay drive power supply 34. A serial connection body 382 may be connected in parallel to form a bridge circuit, and the ON / OFF states of the relays RY1 to RY4 may be detected from contact signals of the relays RY1 to RY4 in the bridge circuit.

  At this time, in the power supply circuit of the present embodiment, the power supply for driving the relays RY1 to RY4 is divided into the control means power supply 33 and the relay drive power supply 34. The control means power supply 33 is a power supply for the control microcomputer 31, the relay control unit 32, the signal detection unit 35, and one of the relays RY1 and RY2 that are distributed, and the relay drive power supply 34 is the other relay that is distributed. It is assumed that power is supplied to RY3 and RY4.

  Since the elevator 101 of this embodiment has such a configuration, it is possible to detect a failure of a power source or a relay or a voltage abnormality with a simple configuration. Further, since the number of relays RY used for detection increases, the accuracy of failure determination increases, and the elevator 101 with higher reliability can be obtained.

  Furthermore, the monitoring part (control microcomputer 31) of this embodiment outputs the instruction | indication which controls operation | movement of the elevator 101 according to the monitoring result.

  Specifically, when it is determined that the power supply voltage is low, the car 13 of the elevator 101 is stopped, and when it is determined that the relay RY is broken, the car 13 of the elevator 101 is Move to the nearest floor and stop. For this reason, it becomes easy to perform an appropriate treatment after the failure determination, and the safety is further improved.

  In the above embodiment, the case where there are two series connection bodies of relays connected in parallel between the brake drive power supply 37 and the brake device 36 has been described as an example. However, the number of series connection bodies is as follows. It is not limited to. There may be three or more. In this case, each series connection body is used by switching in order for each operation of the elevator 101.

  If there are three or more series-connected bodies and only the power supply diagnosis is performed, the above-described processing may be performed using two series-connected bodies. When discriminating up to the failure of the relay, it is discriminated by issuing an ON command independently for all the serially connected bodies.

  In the above embodiment, the case where the number of relays included in the serial connection body is two has been described as an example, but the number of relays is not limited to this. It is sufficient if there are two or more. In the case of three or more, for example, it is divided into a first relay group connected to the control means power supply 33 and a second relay group connected to the relay drive power supply 34, and an ON / OFF command is given to each relay group. Thus, the presence or absence of a voltage drop of the connected power source is determined.

  Furthermore, although the said embodiment gave and demonstrated the case where the to-be-controlled body 36 was a brake device, the to-be-controlled body 36 is not limited to this. For example, the motor 172 or the like may be used.

  In addition, this invention is not limited to embodiment mentioned above, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Moreover, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 11 ... Building, 12 ... Hoistway, 13 ... Ride car, 14 ... Main rope, 15 ... Counterweight, 16 ... Machine room, 17 ... Hoisting machine, 18 ... Baffle, 19 ... Landing place, 20 ... Landing door, 23 DESCRIPTION OF SYMBOLS ... Tail cord, 24 ... Repeater, 25 ... Communication cable 30 ... Control panel, 31 ... Control microcomputer (monitoring part), 32 ... Relay control part, 33 ... First power supply (control means power supply), 34 ... Second Power source (relay driving power source), 35 ... Signal detection unit, 36 ... Controlled body (brake device), 37 ... Controlled body power source (brake driving power source), 38 ... Relay unit, 39 ... Elevating operation control unit 101 ... Elevator, 171: Drive sheave, 172 ... Motor 311 ... ON / OFF command unit, 312 ... Relay state determination unit, 313 ... Power supply state determination unit, 314 ... Control command unit, 320 ... Drive unit, 321 ... First drive unit, 322 … No. ,..., Third drive unit, 324... Fourth drive unit, 381... First series connection body, 382... Second series connection body RY... Relay, RY1. Second relay, RY3 ... Third relay, RY4 ... Fourth relay

Claims (5)

In an elevator comprising a controlled body and a power supply circuit that supplies power to the controlled body and controls the operation of the controlled body.
The power supply circuit is
A controlled body power supply for supplying power to the controlled body;
A relay unit for controlling power supply from the controlled body power source to the controlled body;
A signal detection unit for detecting the state of the relay unit;
The first power supply,
A second power source independent of the first power source;
A monitoring unit that monitors the first power source and the second power source,
The relay unit is
A first relay that is driven by power supplied from the first power source;
A third relay connected in series to the first relay and driven by being supplied with power from the second power source;
The said monitoring part drives said 1st relay and said 3rd relay, respectively, and monitors the state of said 1st power supply and said 2nd power supply, The elevator characterized by the above-mentioned. In the elevator according to claim 1,
The relay unit includes a first series connection body and a second series connection body connected in parallel between the controlled body and the controlled body power supply,
The first series connection body includes the first relay and the third relay,
The second series connection body is:
A second relay that is driven by power supplied from the first power source;
A fourth relay connected in series to the second relay and driven by being supplied with power from the second power source;
The monitoring unit drives the first relay and the third relay, and drives the second relay and the fourth relay separately from the first relay and the third relay. The elevator monitors the states of the first power source, the second power source, and the relay unit. In the elevator according to claim 2,
The monitoring unit
An ON / OFF command section for turning ON / OFF the first relay, the second relay, the third relay, and the fourth relay;
From the result detected by the signal detection unit, a relay state determination unit that determines the ON / OFF state of each of the first relay, the second relay, the third relay, and the fourth relay;
A power supply state determination unit that determines the state of the first power supply and the second power supply from the determination result by the relay state determination unit;
The ON / OFF command unit commands the first relay, the second relay, the third relay, and the fourth relay that have been turned off in advance to be turned on according to a predetermined procedure,
The said signal detection part detects the state of said 1st relay, said 2nd relay, said 3rd relay, and said 4th relay after instruction | command, The elevator characterized by the above-mentioned. In the elevator according to claim 3,
The power supply state determination unit determines that the first power supply has failed when the first relay and the second relay are determined to be in an OFF state, and the third relay and the second relay An elevator characterized in that, when it is determined that the fourth relay is in an OFF state, it is determined that the second power supply has failed. In the elevator according to any one of claims 1 to 4,
The said monitoring part is further equipped with the control command part which outputs the command which controls the operation | movement of the said elevator according to the monitoring result, The elevator characterized by the above-mentioned.