JP2005104705A - Signal transmission system of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal transmission system of an elevator capable of reducing the number of traveling cables as much as possible and transmitting a signal between an elevator controller and a car control unit. <P>SOLUTION: A communication controller 3a and a signal conversion circuit 4a are provided in the elevator controller 2 and a communication controller 3b and a signal conversion circuit 4b are provided in the car control unit 15 to transmit and receive a signal by superimposing the signal on an electric power supply line. A signal is transmitted between the elevator controller 2 and the car control unit 15 using the electric power supply line in the traveling cable 16 connected between the elevator controller 2 and the car control unit 15. Consequently, it is possible to dispense with a cable exclusively for communication for transmitting a signal and reduce the number of traveling cables. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator signal transmission system for transmitting a signal between a car control unit provided in an elevator car room and an elevator control device (elevator main control device) provided in a machine room or a hoistway.

  As shown in FIG. 4, an elevator car 7 is provided with a car control unit 15 that performs door opening and closing operations and control of an operation panel and the like. The car control unit 15 and an elevator control device (elevator control panel) 2 that controls the entire elevator are connected by a moving cable 16. The movement cable 16 exchanges between the elevator control device 2 and the car control unit 15 for power supply such as door driving, lighting, ventilation fan operation, door control, communication of operation panel and intercom. Such signal transmission is the main thing, but other than that, it also performs safety circuit signals and grounding. Accordingly, the moving cable 16 includes a cable for supplying power, a communication dedicated cable for signal transmission, and a cable for grounding.

  As the market needs for elevators in recent years, the reduction and abolition of the moving cable 16 have a great impact as the space saving of the elevator and the reduction in weight and cost are advancing. Further, since the moving cable 16 has different weights applied to the car 7 depending on the position of the car 7, the load of the driving device during traveling is changed, or the balance of the car 7 is changed, which is a factor that deteriorates the riding comfort. It becomes. For this reason, some proposals for eliminating the moving cable 16 have been made so far.

For example, as means for eliminating the power supply cable, a car power source is created by electromagnetic induction during travel of an elevator (see, for example, Patent Document 1), or current is collected with a brush from a power track disposed in a hoistway. The method to take is taken. Radio is used as a signal transmission method related to control.
JP 2001-122543 A (page 3, FIGS. 1 to 3)

  However, power supply using electromagnetic induction or brushes is expensive in terms of cost and does not necessarily save space around the car. In addition, wireless signal transmission also has some problems in terms of reliability, such as noise resistance, in order to rely solely on wireless communication for safety-related signals because of the nature of a vehicle carrying an elevator person. In addition, a ground wire is also necessary. In reality, it is difficult to abolish the mobile cable, and it is difficult to put it into practical use.

  Accordingly, an object of the present invention is to provide an elevator signal transmission system that can reduce the number of moving cables as much as possible and transmit signals between the elevator control device and the car control unit.

In the elevator signal transmission system according to the first aspect of the present invention, a signal is superimposed on the power supply line on each of the elevator control device that controls the elevator and the car control unit that controls the electric device of the car. Means for separating and receiving signals from the power supply line, and using the power supply line in the moving cable connected between the elevator control device and the car control unit, the elevator control device and the car Signal transmission to and from the control unit is performed.

  According to a second aspect of the present invention, in the elevator signal transmission system according to the first aspect, each of the elevator control device and the car control unit includes means for transmitting and receiving signals wirelessly, and the power supply line. In parallel with the transmission of the signal by, the wireless signal transmission is performed.

  According to a third aspect of the present invention, in the elevator signal transmission system according to the second aspect, the elevator control device and the car control unit each match the signals received from the two systems of the power supply line and the radio. A confirmation means for confirming is provided.

  According to a fourth aspect of the present invention, in the elevator signal transmission system according to the third aspect, one of the elevator control device and the car control unit confirms the matching by the confirmation means. If they are different, an error signal is sent to the transmission source, the transmission source confirms the correctness of each system, and the signal is retransmitted from the normal system.

  According to the first aspect of the present invention, the number of moving cables can be reduced as much as possible. For example, the number of moving cable cores can be reduced by approximately half by making the moving cable only a power supply line and a ground line and eliminating all other signal lines for transmitting signals related to control.

  According to the second aspect of the present invention, even if an abnormality occurs in one of the signal from the power supply line and the signal from the radio, the signal can be normally exchanged, and the signal transmission Reliability can be greatly improved.

  According to the third aspect of the present invention, it is possible to always check whether there is an abnormality in the signal transmission system by the confirmation means for confirming the matching of the signals received from the two systems of the power supply line and the radio, Reliability can be increased.

  According to the present invention, the correct signal transmission can always be maintained even if an abnormality occurs in one of the signal transmission systems.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram showing a configuration of an elevator signal transmission system according to a first embodiment of the present invention.

  In FIG. 1, the arrangement of the hoistway 5, the hoisting machine 6, the car 7, the counterweight 8, and the elevator control device (elevator control panel) 2 is the same as that of an elevator with a normal machine room. It is also possible to arrange the elevator control device 2 in the hoistway 5 and make it a machine roomless elevator.

In this embodiment, a moving cable 16 is connected between the elevator control device 2 that controls the operation of the elevator and the car control unit 15 of the car 7. For example, one end of the moving cable 16 is fixed to a predetermined position of the hoistway 5, and the other end is fixed to a predetermined position on the lower side of the car 7 and is drawn into the car control unit 15. As the car 7 moves up and down, the moving cable 16 is suspended below the car while changing the position of the curve. The internal configuration of the moving cable 16 is composed of only a cable (power supply line) for supplying power to the car control unit 15 and a cable (ground line) for grounding the car 7.

  The elevator control device 2 includes a communication control device 3a and a signal conversion circuit 4a, which separates and converts the function of transmitting a control signal superimposed on the power supply line and the control signal on the power supply line. Have the function to receive. Similarly, the car control unit 15 includes a communication control device 3b and a signal conversion circuit 4b. The car control unit 15 separates and converts a control signal superimposed on the power supply line and a control signal on the power supply line. Have the function to receive.

  FIG. 2 shows an example of a specific configuration of the communication control device 3a (3b) and the signal conversion circuit 4a (4b). The communication control device 3a (3b) includes a CPU 21, a memory 22, a signal input / output interface 23, and a transmission / reception interface 24, and controls transmission / reception. The signal conversion circuit 4a (4b) includes a modulation / demodulation circuit 25 and a capacitor 26, and has a function of superimposing the modulated signal on the power supply line and a function of separating and demodulating the signal from the power supply line.

  According to the present embodiment, signal transmission between the elevator control device 2 and the car control unit 15 is performed by superimposing the control signal on the power supply line, and thus can be performed only by the conventional power supply cable. For this reason, it is possible to eliminate a communication dedicated cable for signal transmission, and it is possible to configure a system with about half of the conventional moving cable. Thereby, effects such as cost reduction, weight reduction, and space saving can be obtained.

(Second Embodiment)
FIG. 3 is a diagram showing an elevator signal transmission system according to the second embodiment of the present invention.

  In this embodiment, there are the hoistway 5, the hoisting machine 6, the car 7, the counterweight 8, and the elevator control device 2 of the first embodiment, and the elevator control device 2 that controls the operation of the elevator and the car control of the car 7. It is the same that the moving cable 16 is connected between the units 15. Further, the internal configuration of the moving cable 16 is composed of only a cable (power supply line) for supplying power to the car control unit 15 and a cable (ground line) for grounding the car 7. Includes a communication control device 3a and a signal conversion circuit 4a, which have a function of transmitting a control signal superimposed on a power supply line, and a function of receiving a control signal on the power supply line by separate conversion. Similarly, the car control unit 15 has a communication control device 4b and a signal conversion circuit 4b. The control signal is superimposed on the power supply line and transmitted, and the control signal on the power supply line is separated and received. It has a function to do.

  Furthermore, in 2nd Embodiment, the radio | wireless communication apparatus 17a connected to the communication control apparatus 3a of the elevator control apparatus 2 is provided in the inside of the hoistway 5, and is the radio | wireless connected to the communication control apparatus 3b of the car control unit 15. A communication device 17b is provided in the car 7, and communication of control signals using the wireless communication devices 17a and 17b is performed in parallel with communication of control signals through the power supply line.

  In the present embodiment, there are two communication means for transmitting control signals between the elevator control device 2 and the car control unit 15, one using a power supply line and one using a radio. As a result, even if either the power supply line communication or the wireless communication device communication fails, the control signal can be sent and received by the communication means of the other system. Becomes higher.

For example, when signals are transmitted by two communication means and a parity check is performed for each system on the receiving side, an error is detected in one system by the parity check and there is no error in the other system. If there is no error in the system, it is only necessary to use an error-free signal. It is also possible to send an error signal back to the transmission source and retransmit the signal from both systems.

  Furthermore, on the receiving side, even if no error is detected in the parity check for both systems, if the signals of both systems differ as a result of checking the matching of the signals of both systems (or the parity check of the signals for each system is performed) If the signal of both systems is different), the error signal and the signal received from each system are returned to the transmission source, and the transmission source determines which system the error has occurred. A regular signal may be retransmitted from a normal system.

  As described above, even if there is a signal error in the communication means of either system, if the signals of both systems differ, the error signal is returned to the transmission source and reconfirmed at the signal transmission source. By providing a function of retransmitting a signal from a normal system, the reliability of the system can be remarkably improved, and signals related to the safety of the elevator system can be handled without any problem.

  As described above, according to the present embodiment, substantially the same effect as that of the first embodiment can be obtained, and the reliability substantially equal to that in the case of using the conventional communication dedicated cable can be ensured.

  According to the present invention, it is possible to eliminate the dedicated communication cable used for signal transmission among the moving cables connected to the elevator car, so that it is possible to reduce the cost and the load on the drive device. A transmission system can be provided.

The block diagram which shows the structure of the 1st Embodiment of this invention. The block diagram which shows the further detailed structural example of the principal part in the 1st Embodiment of this invention. The block diagram which shows the structure of the 2nd Embodiment of this invention. The block diagram which shows the signal transmission system of the conventional elevator.

Explanation of symbols

2. Elevator control device (elevator control panel)
3a, 3b ... communication control devices 4a, 4b ... signal conversion circuit 5 ... hoistway 6 ... hoisting machine 7 ... car 8 ... counterweight 15 ... car control unit 16 ... moving cables 17a, 17b ... wireless communication device 21 ... CPU
22 ... Memory 23 ... Signal input / output interface 24 ... Transmission / reception interface 25 ... Modulation demodulation circuit 26 ... Capacitor

Claims (4)

  Means for superimposing and transmitting a signal to a power supply line to each of an elevator control device for controlling an elevator and a car control unit for controlling an electric device of a car, and receiving a signal separated from the power supply line And transmitting a signal between the elevator control device and the car control unit using a power supply line in a moving cable connected between the elevator control device and the car control unit. Elevator signal transmission system.   In the elevator signal transmission system according to claim 1, each of the elevator control device and the car control unit includes means for wirelessly transmitting and receiving signals, and in parallel with the signal transmission by the power supply line, An elevator signal transmission system characterized by wirelessly transmitting a signal.   3. The elevator signal transmission system according to claim 2, wherein each of the elevator control device and the car control unit is provided with confirmation means for confirming a match between signals received from two systems of a power supply line and radio. Elevator signal transmission system. 4. The elevator signal transmission system according to claim 3, wherein if the signals received from the two systems are different as a result of checking the matching by one of the elevator control device and the car control unit, an error signal is displayed. An elevator signal transmission system configured to send to a transmission source, the transmission source confirms the correctness of each system, and retransmits a signal from a normal system.

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