JP6420430B1 - Elevator safety device and elevator safety system - Google Patents

Abstract

【Task】
Provided is an elevator safety device with improved safety while using wireless communication.
[Solution]
The elevator safety device is provided at a predetermined interval in a radio transmission device provided in an elevator car and a hoistway in which the car ascends and descends, and a plurality of signals output from the radio transmission device are received. A wireless reception device for receiving, a wired transmission path provided in the hoistway for transmitting the plurality of signals by wire, and a plurality of central processing units for analyzing each of the plurality of signals and determining consistency And a determination circuit for determining the state of the elevator based on determination of consistency of the plurality of signals by the central processing unit.
[Selection] Figure 3

Description

  Embodiments described herein relate generally to an elevator safety device and an elevator safety system.

  Conventionally, an elevator safety device transmits signals from a manual operation switch provided on a car, an emergency stop button in a car and a door closing button to the control panel via a tail cord. It was.

  If the hoistway on which the car runs is lengthened, the tail cord needs to be lengthened. If the tail cord is lengthened, the weight of the tail cord increases, which places a burden on the hoist that raises and lowers the car. In order not to put a burden on the hoisting machine, it has been proposed to transmit a signal by wireless communication without using the tail cord.

  However, signal transmission by wireless communication may not be able to be performed stably due to the communication environment, and there is a problem that the safety of elevator operation is lowered.

JP 2005-534591 A

  The problem to be solved by the present invention is to provide an elevator safety device and an elevator safety system that improve safety while using wireless communication.

In order to solve the above-described problems, an elevator safety device according to an embodiment is provided with a wireless transmission device provided in an elevator car and a hoistway in which the car moves up and down spaced apart from each other at a predetermined interval. By a wireless reception device that receives a plurality of signals output from a transmission device , a plurality of central processing units that analyze each of the plurality of signals via a transmission path, and determine consistency, and the central processing unit A circuit for determining the state of the elevator based on the determination of the consistency of the plurality of signals, the determination circuit having a switch mechanism that is open when there is no control signal; When the signal is determined to be consistent, the control signal is transmitted to the switch mechanism to be closed, and the plurality of signals are not consistent by the central processing unit. A relay circuit that stops the operation of the elevator by stopping the output of the control signal when determined, the plurality of signals for each signal, information on the manual operation switch, and the state of the emergency stop device Detection information and car door door closing state detection switch information, and the plurality of central processing units include information on the manual operation switch, information on state detection of the emergency stop device, and the car door. The consistency of the plurality of signals is determined for each piece of information with the door closing state detection switch information, and the relay circuit is a plurality of relay circuits, corresponding to at least the consistency of the information of the manual operation switch A relay circuit that is independent of the consistency of other information, and the determination circuit includes a plurality of switch mechanisms in series corresponding to the consistency between the information of the manual operation switch and the other information. In We have to continue to.

In order to solve the above-mentioned problems, an elevator safety system according to an embodiment includes a wireless transmission unit that transmits a plurality of signals about a state of an elevator car, and a hoistway in which the car moves up and down at a predetermined interval. A radio receiving means for receiving a safety device signal by a radio receiving apparatus provided in a manner; a transmission means provided in the hoistway for transmitting the plurality of signals to a control panel; and analyzing each of the plurality of signals. Consistency determining means for determining consistency, and control means for stopping the elevator by cutting off the current supply of the brake and the hoisting machine power supply when the consistency determining means determines that there is no consistency. If, comprising a plurality of signals to each signal, the information of the manual operation switch, and emergency stop device state detection information, and door-closed state detection switch of the car door information, The consistency determination means is configured to output the plurality of signals for each of the information on the manual operation switch, the information on the state detection of the emergency stop device, and the information on the door closing state detection switch of the car door. When the consistency of the information on the manual operation switch is not determined, the control unit determines whether or not the elevator is operating normally. In the case of normal operation, the control means determines whether the elevator is on the landing floor. After that, the current supply to the brake and the hoisting machine power supply is cut off, and the elevator is stopped.

The figure of the safety device of the elevator which is a 1st embodiment. Correspondence table of hoistway radio devices corresponding to the current position of the car. The block diagram of the system of the safety device of the elevator which is 1st Embodiment. The flowchart of the safety system of the elevator of 1st Embodiment. The flowchart of the safety system of the elevator of 2nd Embodiment.

  Hereinafter, an embodiment of an elevator safety device will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a configuration diagram of an elevator safety device according to a first embodiment. In the elevator safety device according to the present embodiment, a car 12 and a counterweight (counterweight) 13 are connected via a main rope 14 in the hoistway 10. Each of the car 12 and the counterweight 13 is supported by a guide rail (not shown) so as to be able to move up and down.

  A control panel 11, a hoisting machine 15 and a sheave 16 are provided at the upper part of the hoistway 10. A main rope 14 is wound around the hoisting machine 15. One end of the main rope 14 is connected to the car 12 and the other end is connected to the counterweight 13 via the sheave 16.

  When the hoisting machine 15 is driven based on the control of the control panel 11, the car 12 and the counterweight 13 connected to both ends of the main rope 14 are moved up and down in directions opposite to each other.

  The car 12 is provided with a car control panel 17 and a car radio device 21 (radio transmission device, radio transmission means). Further, a plurality of hoistway radio devices 22 (wireless receiving devices, radio receiving means) are provided in the hoistway 10 at predetermined intervals along the raising / lowering direction of the car 12, and the car radio device 21. The signal transmitted from is received by radio.

  In FIG. 1, the car control panel 17 and the car radio device 21 are provided on the upper part of the outer periphery of the car 12, but their installation location is not limited to the upper part of the outer periphery. The car radio device 21 and the hoistway radio device 22 include, for example, a wireless LAN. However, the communication method of the car radio device 21 and the hoistway radio device 22 is not limited to the wireless LAN.

  The installation interval of the hoistway radio apparatus 22 is a position corresponding to the landing position of the landing 23 on each floor. FIG. 2 is a correspondence table of the hoistway radio device 22 corresponding to the current position of the car 12. 1 and 2, the hall 23 will be described in detail from the first floor to the third floor. However, in this embodiment and the following embodiments, the number of floors of the hall 23 is not limited to the third floor, and the number of wireless relay devices is not limited to three.

  The first floor hall 23 is a hall 23a, and the corresponding hoistway radio device 22 is a hoistway radio device 22a. The second floor hall 23 is a hall 23b, and the corresponding hoistway radio device 22 is a hoistway radio device 22b. The hall 23 on the third floor is a hall 23c, and the corresponding hoistway radio device 22 is a hoistway radio device 22c. The car radio device 21 performs radio communication with the hoistway radio device 22a when the car 12 is located on the first floor (the landing 23a). Similarly, the car radio device 21 includes a hoistway radio device 22b when the car 12 is located on the second floor (the landing 23b) and a hoistway radio device when the car 12 is located on the third floor (the landing 23c). 22c and wireless communication.

  A landing door 24 is provided at the landing 23 (23a to 23c) on each floor. A car door 25 is provided on the car 12. When the car 12 is landed and the car door 25 is opened, the landing door 24 on the landing floor is opened in conjunction with the car door 25. When the car door 25 is closed, the landing door 24 on the landing floor is closed in conjunction with the car door 25.

  The hoistway 10 is provided with an in-hoistway transmission line 26 (transmission means) for transmitting signals from the hoistway radio devices 22 (22a to 22c) to the control panel 11. The in-hoistway transmission line 26 is a wired transmission line. When the elevator safety device 22 of the present embodiment receives a radio signal from the car radio device 21 by the hoistway radio device 22 (22a to 22c), the control device 11 sends the signal via the in-hoistway transmission line 26. Transmit to.

  FIG. 3 is a configuration diagram of a system of an elevator safety device according to the first embodiment. The system of the elevator safety device according to the present embodiment is determined as a car-side radio communication unit 31, a hoistway-side radio communication unit 32, a first central processing unit (CPU) 33, and a second central processing unit (CPU) 34. A circuit (chain circuit) 35, a brake and hoisting machine power contactor 38, and a relay circuit 39 are provided. 3 is the system on the car 12 side, and the left one-dot chain line in FIG. 3 is the system on the hoistway 10 / control panel 11 side.

  The car-side radio communication unit 31 includes a signal converter of the car control panel 17 and a car radio device 21. The car-side radio communication unit 31 receives signals from the car 12 regarding the states of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43. These signals regarding the states of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43 are referred to as safety device signals.

  The safety device signal is a signal based on the safety of elevator operation. The elevator safety system determines that the elevator is safe if the safety signal is normal. If there is an abnormality in the safety device signal, the elevator safety device system determines that there is an abnormality in the device that issued the abnormal signal. However, the safety device signal is an example of the safety device signal for the state of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43. There is no limitation.

  The manual operation switch 41 is provided at the upper part of the outer periphery of the car 12. The manual operation switch 41 is a switch for a maintenance person to raise and lower the car 12 at the upper part of the outer periphery of the car 12 when the elevator is maintained. Therefore, the manual operation switch 41 is a switch for switching to the elevator inspection operation, and is not a switch for normal operation. The manual operation switch 41 outputs a signal indicating the switching state to the car-side wireless communication unit 31.

  The emergency stop device state detection device 42 is a device that detects the state of an emergency stop device (such as an emergency stop button) of the car 12. When the emergency stop button is pressed, the state detection device 42 of the emergency stop device outputs a signal indicating that the emergency stop button has been pressed to the car-side wireless communication unit 31.

  The car door door closed state detection switch 43 is a switch for detecting the state of the car door 25 of the car 12. The detection switch 43 in the car door door closed state outputs the detected information to the car-side wireless communication unit 31.

  When the car-side radio communication unit 31 receives signals from the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43, the car control panel 17 converts the signal into a radio signal. To do. The radio signal is a signal composed of a plurality of radio signals. In the present embodiment and the following embodiments, the first wireless signal A1 and the second wireless signal A2 are used. However, the radio signal may be composed of three or more signals.

  In the present embodiment and the following embodiments, the first radio signal A1 and the second radio signal A2 have different frequencies. For example, the first radio signal A1 is a high frequency band signal, and the second radio signal A2 is a low frequency band signal. For example, the first radio signal A1 may be a signal in the frequency band of 5 GHz, and the second radio signal A2 may be a signal in the frequency band of 2.4 GHz. In addition, the first radio signal A1 and the second radio signal A2 may be distinguished for characteristics other than frequency.

  The hoistway-side radio communication unit 32 includes the hoistway radio device 22 and a signal converter in the control panel 11. The hoistway radio device 22 receives the first radio signal A 1 and the second radio signal A 2 from the car radio device 21. The first radio signal A1 and the second radio signal A2 include information based on the states of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43. . The signal converter in the control panel 11 converts each of the first radio signal A1 and the second radio signal A2 into a digital signal.

  The first central processing unit 33 and the second central processing unit 34 read the converted digital signal. The first central processing unit 33 performs signal analysis on the first radio signal A1, and the second central processing unit 34 performs signal analysis on the second radio signal A2. That is, this embodiment is provided with a central processing unit according to the type of radio signal.

  The first central processing unit 33 obtains information on the states of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43 included in the first radio signal A1 by analysis. The second central processing unit 34 obtains information on the states of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43 included in the second radio signal A2 by analysis. The 1st central processing unit 33 and the 2nd central processing unit 34 determine consistency about each information obtained from 1st radio signal A1 and 2nd radio signal A2 as a consistency determination means.

  When it is determined that the first radio signal A1 and the second radio signal A2 are consistent, signals are output to the relay circuit 39 (RY1 to RY4 in FIG. 3). When the relay circuit 39 receives the signal, the relay circuit 39 outputs a control signal for closing the switch mechanisms 36 and 37 provided in the determination circuit 35.

  The determination circuit 35 is a chain circuit in which switch mechanisms are arranged in series. The switch mechanism is provided on the car 12, the switch mechanism 36 for the manual operation switch 41, the emergency stop device state detection device 42 and the car door door closed state detection switch provided in the car 12. 43 has a switch mechanism 37. Other switch mechanisms include, for example, a manual operation switch installed on the hoistway 10 side, a switch for a safety device installed on the hoistway 10, and a switch mechanism for a door closing switch on the landing 23 side. However, other switch mechanisms are not limited to these.

  The switch mechanisms 36 and 37 are opened when the control signal is not received (open state), and when the control signal is received from the relay circuit 39, the switch is closed (closed state). Other switch mechanisms are open when no control signal is received, and switches are closed when a control signal is received for each switch mechanism.

  The determination circuit 35 is connected to the brake and hoisting machine power contactor 38, and is a circuit as a control means. When all the switch mechanisms in the determination circuit 35 are closed, current is supplied to the brake and hoisting machine power contactor 38, and the elevator can be moved up and down. When at least one of the switch mechanisms in the determination circuit 35 is in the open state, no electric current is supplied to the brake and the hoisting machine power contactor 38, so that the elevator lifting / lowering operation stops.

  As a result of signal analysis by the first central processing unit 33 and the second central processing unit 34, when it is determined that the information of the manual operation switch 41 is consistent, the first central processing unit 33 determines that the relay circuit 39 ( RY1) transmits a control signal for closing the switch mechanism 36, and the second central processing unit 34 causes the relay circuit 39 (RY2) to transmit a control signal for closing the switch mechanism 36.

  As a result of signal analysis by the first central processing unit 33 and the second central processing unit 34, it is determined that the state information of the emergency stop device state detection device 42 and the state of the car door door closed state detection switch 43 is consistent. Then, the first central processing unit 33 causes the relay circuit 39 (RY3) to transmit a control signal for closing the switch mechanism 37, and the second central processing unit 34 causes the relay circuit 39 (RY4) to switch to the switch mechanism. A control signal for closing 37 is transmitted.

  In FIG. 3, the control signal is sent from the relay circuit 39 to the switch mechanisms 36 and 37 in the state of the manual operation switch 41 and the state of the emergency stop device state detection device 42 and the state of the car door door closed state detection switch 43. However, the switch mechanisms 36 and 37 may be separated into one switch mechanism. Further, the state of the emergency stop device state detection device 42 and the state of the car door closed state detection switch 43 may be determined separately, and one more switch mechanism may be added.

  FIG. 4 is a flowchart of the elevator safety system according to the first embodiment. The first central processing unit 33 and the second central processing unit 34 determine the consistency of the safety device signal. That is, it is determined whether the first radio signal A1 and the second radio signal A2 are consistent from the state of the manual operation switch 41, the emergency stop device state detection device 42, and the car door door closed state detection switch 43. Perform (step S100). If there is consistency (YES in step S100), normal operation of the elevator is continued (step S101). If there is no consistency (NO in step S100), the brake and hoisting machine power contactor 38 is shut off, and a fault condition is reported (step S103).

  As described above, the elevator safety device and the elevator safety system of the present embodiment can improve safety while using wireless communication instead of the tail cord.

(Second Embodiment)
The configuration diagram of the elevator safety device of the second embodiment is the same as FIG. Further, the correspondence table of the hoistway radio device 22 corresponding to the current position of the car 12 of the second embodiment is the same as FIG. The configuration diagram of the system of the elevator safety device of the present embodiment is the same as FIG. However, the relay circuit is composed of a plurality of relay circuits 39, and at least the relay circuit 39 (RY1, RY2) corresponding to the information consistency of the manual operation switch 41 has other information (that is, the state of the emergency stop device). It has independently the relay circuit 39 (RY3, RY4) corresponding to the consistency of the detection device 42 and the detection switch 43 in the closed state of the car door.

  Since the manual operation switch 41 is a switch that is switched only to the inspection operation, the manual switch 41 is not switched during the normal operation. As a result of signal analysis by the first central processing unit 33 and the second central processing unit 34, if it is determined that the signal for the manual operation switch 41 is inconsistent, there is a possibility that a malfunction has occurred. . In the present embodiment, the possibility of malfunction of the manual operation switch 41 is determined.

FIG. 5 is a flowchart of the elevator safety system according to the second embodiment. The first central processing unit 33 and the second central processing unit 34 determine the signal consistency of the manual operation switch 41 among the signals of the safety device (step S200). If there is consistency (YES in step S200), the consistency of the signal regarding the safety device of the car 12 among the signals of the safety device is determined. That is, it is determined whether the first radio signal A1 and the second radio signal A2 are consistent from the state of the emergency stop device state detection device 42 and the car door closed detection switch 43 (step S201). . If there is consistency (YES in step S201), normal operation of the elevator is continued (step S202). If there is no consistency (NO in step S201), the emergency stop button is pressed or the signal of the detection switch 43 in the car door closed state is abnormal, so the brake and hoisting machine power supply is immediately shut off. Then, the elevator is stopped and a failure state is issued (step S204).

  If the consistency of the signal for the manual operation switch 41 (step S200) is not consistent (NO in step S200), it is determined whether or not the elevator is in normal operation (step S203).

  If not in normal operation (NO in step S203), the elevator is in a state of stop / inspection operation, etc., and the brake and hoisting machine power contactor 38 are immediately shut off and a fault condition is reported (step S204). .

  In the case of normal operation (YES in step S203), the manual operation switch 41 may be detected by vibration or the like. In this case, after the elevator is moved to the landing floor and stopped, the brake and the hoisting machine power contactor 38 are shut off, and the failure state is notified (step S205).

  As described above, the elevator safety device and the elevator safety system according to the present embodiment can check the state of the manual operation switch while using wireless communication instead of the tail cord. Thereby, safety can be improved.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Hoistway 11 ... Control board 12 ... Car 13 ... Counterweight 14 ... Main rope 15 ... Hoisting machine 16 ... Sheave 17 ... Car control board 21 ... Car radio | wireless apparatus 22 (22a-22c) ... Hoistway radio | wireless apparatus 23 (23a to 23c) ... landing 24 ... landing door 25 ... car door 26 ... transmission line 31 in hoistway ... car side radio communication unit 32 ... hoistway side radio communication unit 33 ... first central processing unit (CPU)
34 ... Second central processing unit (CPU)
35 ... Judgment circuit (chain circuit)
36 ... Switch mechanism 37 (for manual operation switch) ... Switch mechanism 38 (for emergency stop device state detection device and car door door closed state detection switch) ... Brake and hoisting machine power contactor 39 ... Relay circuit 41 ... Manual operation switch 42 ... Emergency stop device state detection device 43 ... Car door door closed state detection switch A1 ... First wireless signal A2 ... Second wireless signal

Claims (4)

A wireless transmission device provided in the elevator car;
A wireless receiver that receives a plurality of signals output from the wireless transmitter, and is provided at a predetermined interval in a hoistway in which the car moves up and down;
Analyzing each of the plurality of signals via a transmission line, and determining a plurality of central processing units for determining consistency,
A circuit for determining the state of the elevator based on determination of the consistency of the plurality of signals by the central processing unit, and a determination circuit having a switch mechanism that is open when there is no control signal;
When the central processing unit determines that the plurality of signals are consistent, the control signal is transmitted to the switch mechanism to be in a closed state, and the plurality of signals are not consistent by the central processing unit. If determined, a relay circuit that stops the operation of the elevator by stopping the output of the control signal;
Comprising
For each signal, the plurality of signals include information on a manual operation switch, information on state detection of an emergency stop device, and information on a door closing state detection switch of a car door,
The plurality of central processing units match the plurality of signals for information on the manual operation switch, information on state detection of the emergency stop device, and information on the door closing state detection switch of the car door. Judging gender,
The relay circuit is a plurality of relay circuits, and has at least a relay circuit corresponding to the consistency of information of the manual operation switch, independently of the consistency of other information,
The determination circuit has a plurality of switch mechanisms connected in series corresponding to the consistency between the information on the manual operation switch and the other information.
Elevator safety device. The plurality of signals include a signal having a first frequency and a signal having a second frequency;
The plurality of central processing units includes a first central processing unit that analyzes a signal having the first frequency, and a second central processing unit that analyzes a signal having the second frequency, Determining consistency based on the analysis results of the first central processing unit and the second central processing unit;
The elevator safety device according to claim 1. Wireless transmission means for transmitting a plurality of signals about the state of the elevator car;
Radio receiving means for receiving a safety device signal by a radio receiving device provided at a predetermined interval in a hoistway where the car ascends and descends;
A transmission means provided in the hoistway for transmitting the plurality of signals to the control panel;
Consistency determining means for analyzing each of the plurality of signals and determining consistency;
Control means for stopping the elevator by cutting off the current supply of the brake and the hoisting machine power supply when the consistency determination means determines that there is no consistency,
Equipped with,
For each signal, the plurality of signals include information on a manual operation switch, information on state detection of an emergency stop device, and information on a door closing state detection switch of a car door,
The consistency determination means is configured to match the plurality of signals for each of the information on the manual operation switch, the information on the state detection of the emergency stop device, and the information on the door closing state detection switch of the car door. Determine
If there is no consistency in the information of the manual operation switch, the control means determines whether or not the elevator is in normal operation, and in normal operation, moves the car to the landing floor, and then brakes And shut off the current supply of the hoisting machine power supply and stop the elevator,
Elevator safety system. The plurality of signals include a signal having a first frequency and a signal having a second frequency;
The consistency determination unit is based on an analysis result of a first central processing unit that analyzes the signal having the first frequency and a second central processing unit that analyzes the signal having the second frequency. To determine consistency
The elevator safety system according to claim 3 .