JPH04365760A - Control unit for self-traveling elevator - Google Patents

Abstract

PURPOSE:To save a number of wires of signal line by transmitting a switching command signal, output from a power supply control unit of each riding cage to a section switching device of each section, as a code signal. CONSTITUTION:In an arithmetic processor 24 of a power supply control unit 19, a section select switching device 20 for supplying drive power to a section coil required for controlling a riding cage in charge of the own is selected. A data is output to a terminal device 27 of each section switching device 20 by a terminal device 25 and a transmission signal line 26. Thus in the power supply control unit 19 for controlling each riding cage of each elevator, a primary coil is divided into the above-mentioned section coil in each lift path, and a command signal is transmitted to each section select switching device 20 through the transmission signal line 26 and selectively switched by the section select switching device 20 in each before-mentioned section coil to control connection/disconnection of the power supply and propulsion of each riding cage. In this way, a number of wiring signal lines can be reduced.

Description

[Detailed description of the invention]

[Object of the invention]

0002

[Industrial Application Field] The present invention is a self-propelled elevator for simultaneously running multiple self-propelled elevator cars on the same traveling route, which use a linear motor as a drive device and are capable of running vertically and horizontally. The present invention relates to a control device.

0003

[Prior Art] Most of the elevators that have been widely used in the past are It is a system in which a car and a counterweight are connected in a rope-like manner, and one car is placed in one hoistway.

[0004] As shown in FIG. 4, this crane-shaped elevator has a car 1 and a counterweight 2 placed in a hoistway with guide rails 3 and 4 provided therebetween, and is used to raise and lower the elevator. Hoisting machine 5 installed in the machine room on the road
The structure is such that the two are connected in a hanging shape with a rope 8 via a sheave 6, a deflection sheave 7, etc. In recent years, a three-phase induction motor and an inverter device equipped with a microprocessor in the control device have been widely used as the drive motor for the hoist 5.

[0005] In such a control device for a crane-like elevator, in order to run the car 1, the driving force required is the amount of the unbalanced load with the counterweight 2, excluding the running loss caused by the machine. It has the advantage that the capacity of the drive device and control device is small, and since it is a method that has been widely used in the past, the technology is established in terms of performance and safety, and it is reliable.

However, in recent years, as a future perspective, new ideas for inter-floor transportation systems have been proposed to meet the demands of ultra-high-rise buildings.
One of the new transportation systems that has been proposed is a self-propelled elevator in which the car itself runs without the use of ropes. This is a concept for an elevator that can move vertically and horizontally.

The concept of this self-propelled elevator system is as follows:
This breaks down the conventional concept of one car per hoistway, and is attracting attention as an innovative technology that allows multiple cars to run in one hoistway.

FIG. 5 shows the system configuration of such a self-propelled elevator that can run vertically and horizontally, in which linear motor secondary conductors 10 are installed in a plurality of cars 9, and linear motors installed in the hoistway are connected to each other. The driving thrust is obtained by the magnetic force between the primary coil 11 and the primary coil 11. As a safety device, there is a brake 12 and a shock absorber 13 for mitigating the impact caused by mutual collision between the cars 9, and a superconducting magnet 14 installed inside or below the shock absorber 13 to perform connected traveling. We are prepared. Furthermore, a hanging machine 15 and a movable plate 16 for horizontal traveling are installed on the top floor, and a hydraulic jack 17 is also installed on the bottom floor.
A plurality of cars 9 can run on the hoistway.

[0009] As a power supply control device for supplying power to each car for traveling control of such a linear motor-driven self-propelled elevator, a configuration shown in FIG. 6 has been proposed. . The self-propelled elevator control device shown in FIG. 6 is a system that causes a plurality of cars (cars No. 1 to No. X) to run in a plurality of hoistways A to Z. However, to simplify the explanation, only the ascending and descending directions are described.

In the figure, 18 is the hoistway primary coil of the drive linear motor, which is installed in each hoistway A to Z, divided into a plurality of sections a to y depending on the length of the entire lifting stroke. has been done. The reason why the primary coil 18 is divided into multiple sections in this way is that if the primary coil were to span the entire length of the hoistway, it would be a long coil, but currently such a long coil has a large loss. This is because the economic efficiency of the entire system is impaired. Reference numeral 19 denotes a power supply control device for controlling drive power supply, which is installed in correspondence with the number of cars 1 to X. Further, 20 is each power supply control device 19
This is a section selection switch for supplying driving power from to each section coil 18, and as shown in the figure, each power supply control device 1
The output end of 9 connects all section coils 1 through a switch 20.
8 is connected. Therefore, the section selection switchers 20 for the number of cars can be connected to each section coil 18, and for example, the power supply control device 19 of the first car is connected to
Section selection switch 20 for the section where car No. 1 exists
The car can be propelled by selecting and supplying driving power to the section coil 18, and sequentially selecting the section selection switch 20 according to the traveling direction of the car.

[0011] In other words, the car of No. 1 is in hoistway A.
If the car exists in section B, the power supply control device 19 of car No. 1 first selects section selection switch 20 of section 1Aa, and when the car moves to section b of hoistway A,
The section selection switch 20 is selected.

[0012] Here, in order to simplify control, the section coil 18 allows only one car to be occupied within one section, based on the idea that it corresponds to a closed section in a railway system. Therefore, if the coil section length is too long, not only will the loss of the linear motor increase, but the distance between the cars will be restricted. Therefore, it is efficient to set the section length to at least slightly longer than one car, but if it is too short, there is a problem that the number of section selection switchers 20 to be installed increases, so it is preferable , the distance between the parking floors will be set so that separate cars can be stopped on each floor.

Further, when an AC linear motor is used to obtain a large thrust, polyphase AC such as three-phase AC is typically used for the section coil 18. Therefore, the section selection switch 20 also needs to be of a specification that can turn on and cut off the three-phase power supply. FIG. 7 shows, as an example of such a section selection switch 20, a semiconductor switch 21 of a natural commutation element such as a thyristor configured in three-phase anti-parallel configuration.
An example using .

In the case of the section selection switch 20, the gate circuit 23 outputs an ignition signal to the switch 21 upon receiving the selection command 22 from the power supply control device 19. This selection command 22 is outputted only during the period during which driving power is desired to be supplied to each section coil 18, and when the selection command 22 is canceled,
The switch 21 is turned off.

In the conventional control system for self-propelled elevators having such a configuration, the power supply control system 19 of each machine is installed in a room away from the hoistway, but as is clear from FIG. If the device 20 is installed in the same room as the power supply control device 19, a large number of main circuit wires for supplying drive power must be installed from the section selection switch 20 to each section coil 18, resulting in an enormous amount of wires. . Therefore, the switch 20 is installed near each coil 18 in the hoistway, and the input wires for the switch 20 are installed from the top to the bottom of the hoistway, and the sections up to the section selection switch 20 are connected to each adjacent coil. By branching out from the position, the amount of main circuit wires can be significantly reduced. Furthermore, branching to other hoistways is also possible.

In this way, by adopting a method in which the power supply control device 19 is installed in correspondence with the number of cars, regardless of the number of hoistways, compared to a method in which a separate power supply control device is installed in each section. This means that the power supply control device, which requires a huge amount of cost and space, can be installed in accordance with the number of cars, so the larger the number of hoistways and the length of the hoistway, the more effective it becomes. In this case, a large number of section selection switchers 20 are required, but these are smaller and cheaper than power supply control devices, so overall space savings and cost reductions can be achieved. There are benefits.

[0017]

[Problems to be Solved by the Invention] As described above, a control device for a self-propelled elevator in which a power supply control device is installed for each car and a large number of section selection switchers is installed is space-saving,
Although this system has a great advantage in terms of cost reduction, it is necessary to connect the power supply control device of each car to section selection switchers corresponding to the total number of travel route sections, making it difficult to transmit a huge amount of signals. It is desired to construct a system that maintains reliability and performs operations efficiently.

The present invention has been made in response to such technical demands, and is an autonomous power supply system equipped with a system suitable for supplying command signals from a power supply control device to each section selection switch connected to it. The purpose of the present invention is to provide a control device for a running elevator.

[Configuration of the invention]

[0020]

[Means for Solving the Problems] The present invention provides a primary coil of a multiphase AC linear motor provided along a running path formed in a building, and a primary coil for each of a plurality of cars arranged on the running path. In a control device for a self-propelled elevator that generates thrust by magnetic force between a secondary conductor of an installed linear motor and causes the car to travel on a traveling path, a power source for driving the car. A control device is installed for the number of cars, the primary coil of the linear motor is divided into a plurality of sections, and a section selection switch is installed to select the primary coil for each divided section and supply driving power, and the A signal transmission device is provided for transmitting a selection command signal outputted from the power supply control device of each car to the section selection switch of each section as a code signal.

Further, in the self-propelled elevator control device of the present invention, a common parallel transmission signal can be used as the selection command signal and transmitted to each section selection switch.

Further, the control device for a self-propelled elevator according to the present invention uses a serial transmission signal as the selection command signal,
The information may be transmitted to each section selection switch.

Furthermore, the self-propelled elevator control device of the present invention includes an information signal regarding the running direction of the car in the transmission signal so that two or more adjacent sections are selected for the same selection code. can be added.

[0024]

[Operation] In the self-propelled elevator control device of the present invention,
By controlling the power supply to the primary coil of the linear motor from the power supply control device corresponding to each of the plurality of cars, the running of each of the cars that it is in charge of is controlled. In this case, the primary coil of the linear motor is divided into a plurality of sections, and a section selection switch is provided to selectively switch and supply power from the power supply control device of each car for each divided section. In each divided section, each car can receive power from its own power control device to obtain thrust.

[0025] In order to select a section to be connected by each power supply control device, a section coil is selected by transmitting a command signal from the power supply control device to the corresponding section selection switch to give a connection command. Power can be supplied by

Furthermore, in the self-propelled elevator control device of the present invention, the command signal from each power supply control device to the corresponding section selection switch is converted into a parallel transmission signal and transmitted to all section selection switches. The section selection switch receives the incoming parallel signal and determines whether it is the command signal assigned to it, and if it is the selection signal for itself, it stops the power supply from the power control device. Make sure you receive it.

[0027] In this way, even if there are a large number of section coils, the section coil for driving the car to be driven can be selected and driving power can be smoothly supplied.

Furthermore, in the self-propelled elevator control device of the present invention, by using the command signal as a serial transmission signal,
The number of signal lines can be saved.

Furthermore, in the self-propelled elevator control device of the present invention, an information signal regarding the running direction of the car is added to the transmission signal so that two or more adjacent sections are selected for the same selection code. By adding this, the direction of propulsion of the car can be specified and its drive can be made smooth.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention, showing a power supply control device 19 for each car in the system shown in FIG. A section selection switch 20 for each car is shown. In the figure, 24 is an arithmetic processing unit installed in each power supply control device 19, and this arithmetic processing unit 24 is
For example, it is composed of a microprocessor or logic circuit. Further, 25 is a terminal device connected to the arithmetic processing unit 24, and a transmission signal line 26 is connected to the terminal device 24.
A selection command signal 22 is transmitted to each section selection switch 20 via.

Reference numeral 27 denotes a terminal device installed in the section selection switch 20. A transmission signal line 26 is connected to this terminal device 27, and commands transmitted from the terminal device 25 on the power supply control device 19 side are connected to the terminal device 27. It is adapted to receive a signal 22. Further, a gate circuit 23 and a semiconductor switch 21 are connected to this terminal device 27.

Next, the operation of the self-propelled elevator control device having the above configuration will be explained.

The arithmetic processing unit 24 of the power supply control device 19 includes:
Section selection switch 20 for supplying driving power to the section coil 18 necessary to control the car that you are responsible for
is selected, and the data is output to the terminal device 27 of each section selection switch 20 via the terminal device 25 and transmission signal line 26.

The terminal device 27 determines that it is the section selection switch 20 corresponding to the data, and switches the gate circuit 2
3 to turn on the switch 21. Further, when the selection based on the data is canceled, the switch 21 is turned off.

In this way, the power supply control device 19 for controlling each car of each elevator from No. 1 to No.
divides the primary coil into section coils 18 of a to y for each hoistway A to Z, transmits the command signal 22 to each section selection switch 20 via the transmission signal line 26, and selects each section coil 18.
The connection and disconnection of the power source is individually controlled by selecting each section using the section selection switch 20, thereby controlling the propulsion of each car.

The section selection switching command signal 22 to the section selection switch 20 transmitted via the transmission signal line 26 is as follows:
It may be a parallel signal or a serial signal. Furthermore, information indicating the operating direction of the elevator may be added to these signals.

FIG. 2 shows an embodiment in which parallel signals are used as command signals. The power supply control device 19 of each car is equipped with an arithmetic processing device 24 and a terminal device 25, and this terminal device 25 is equipped with a signal latch circuit 251 and an output circuit 252. It is designed to output parallel signals up to.

Furthermore, each section selection changeover device 20 has a switch 2.
1, a gate circuit 23, and a terminal device 27, and the terminal device 27 includes a parallel signal input circuit 271, a code setting circuit 272, and a logic circuit 273.

In the case of this embodiment, if the parallel signal Latch circuit 251 via 24A
transmitted to. The latch circuit 251 sets the switch selection command signal 22 of the output circuit 252 while updating data at the timing of the selection signal 25B.

This signal 22 is output as a code,
It is transmitted to the input circuit 271 of each switch terminal device 27. Here, as an example, if there are nine signal lines for the code,
29 (=512) switching devices 20 can be connected, which means that if the section distance is about one floor of a building, and the number of hoistways is 5, this is equivalent to about 102 floors in a high-rise building. This means that it can be applied to.

In each switch terminal device 27, a code setting circuit 272 has an individual code that can be recognized in advance, and the transmitted code signal is compared with this code, and if they match, the gate circuit 23 An on signal for the switch 21 is output.

[0043] In this way, the power supply control device 19 of each car
When attempting to drive the car that he/she is responsible for, in order to supply power to the section coil 18 in which the car is located, the section select switch 20 of the section coil 18 corresponding to the section coil 18 is activated by the command signal 22. By making a selection and supplying power, driving thrust is provided.

[0044] In addition, if an attempt is made to smoothly drive a car using a linear motor, the primary coil of the linear motor that supplies drive power is actually not just one section coil for the section where the car is present. Instead, it is necessary to simultaneously feed power to a plurality of adjacent coils, and to achieve this, an information signal is required in addition to the selection code. For example, two of the parallel signal lines (signal lines A and B) are used as elevator operation direction signals, one of them is set for vertical direction selection, and the other one is set for horizontal direction selection, and the ON value is "1" and the off value is "0". ” can be commanded.

Furthermore, when supplying drive power to three locations at the same time, including the primary coil 18 corresponding to the specified code and its section selection switch 20, to the adjacent coils on both sides, the logic circuit 273 allows the self-setting By discriminating the code and the codes ±1 before and after it and turning on the switch 21, the car can be driven smoothly. In other words, the order of ±1 is determined by the driving direction signal, for example, in the case of an upward driving command, [designation code +1
] → [Specification code] → [Specification code - 1] is the corresponding period, and in the case of a descending operation command, [Specification code - 1] → [
By setting [designated code] → [designated code + 1] as the corresponding period, an appropriate selection can be made. The same is true for horizontal selection.

Furthermore, along with the addition of these information signals,
By using one of the transmission signal lines 26, for example, the signal line C, as a selection permission signal, it is also possible to manage normal operation stoppage and selection in an emergency.

In this way, by transmitting the selection signal to a large number of section selection switchers 20 as a code signal, it becomes possible to share the wiring to each switcher 20. In addition, the logic circuit 27 of the terminal device 27 in the switch 20
By adding an appropriate code selection function to 3 and installing a dedicated information signal line, it becomes possible to easily select an appropriate period for smoothly driving the car. Furthermore, in FIG. 2, by increasing the number of parallel signals, it is possible to cope with an increase in the number of sections without increasing the number of signal lines.

Next, an embodiment in which a serial signal is transmitted as a code signal will be described. FIG. 3 shows an embodiment in which a serial signal is transmitted as a code signal, and the power supply control device 1
The terminal device 25 of No. 9 is equipped with a serial transmission processing CPU 253 and a transmission device 254, and the terminal device 27 of the section selection switch 20 is equipped with a serial signal transmission device 274 and a serial transmission CP.
This configuration includes U275. As the serial transmission method employed here, various widely known methods can be used.

In the self-propelled elevator control device of this embodiment, the switch selection signal (code signal) determined by the arithmetic processing unit 24 is used in the power supply control device 19 of each car.
are serial signal processing CPUs via their respective data buses.
253 to the transmission device 254 and the signal line 26 to the transmission device 274 of the section selection switch 20, where it is received and input to the serial transmission CPU 275.

Similar to the embodiment shown in FIG. 2, the serial transmission CPU 275 outputs a signal to the gate circuit 23 to turn on the switch 21 for an appropriate period corresponding to the set own code. Applicable section selection switch 2
0 supplies power to the section coil 18 to propel the car.

Here, the update of the code signal may be monitored and confirmed by the transmission processing CPU 275 at predetermined intervals. In addition, in the case of high-speed transmission, it is also possible to transmit individual codes for each switch so that the section selection switch 20 simultaneously selects the necessary locations.

Note that, when the command signal is transmitted using serial transmission signal lines as in the embodiment of FIG. 3, the number of signal lines can be significantly reduced. Furthermore, if optical transmission is used for serial transmission, reliability against noise can be improved.

[0053] Even in this method of serial transmission, in addition to the serial transmission lines, it is necessary to install parallel signal lines for important information as shown in Figure 2, and to multiplex the serial signal lines. This makes it possible to further improve the reliability of the system.

[0054]

[Effects of the Invention] As described above, according to the present invention, a power supply control device is provided for each car, a section selection switch is installed near the section coil of each hoistway, and each section selection is switched by signal transmission. By transmitting the selection signal for the device as a code signal and connecting the corresponding section selection switch to the section coil, driving power is supplied to the predetermined section coil. The number of signal lines can be significantly reduced compared to the case where the power supply line is directly connected to the signal line.

Furthermore, if this signal is transmitted using a serial transmission signal system, the number of signal lines can be further reduced compared to the case of parallel signals.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a block diagram of another embodiment of the invention.

FIG. 3 is a block diagram of yet another embodiment of the invention.

FIG. 4 is a mechanical diagram of a conventional crane elevator.

FIG. 5 is a mechanical diagram of a self-propelled elevator.

FIG. 6 is a block diagram of a power supply control device used for power supply control in the self-propelled elevator.

FIG. 7 is a block diagram of a section selection switch in the power supply control device.

[Explanation of symbols]

9...cart 10...Linear motor secondary conductor 11...Linear motor primary conductor 18…Section coil 19...Power control device 20…Section selection switch 21...Switch 22...Selection command signal 23...Gate circuit 24... Arithmetic processing unit 25...Terminal device 26...Transmission signal line 27...Terminal device 251...Signal latch circuit 252...Output circuit 253...CPU for serial transmission 254...Series transmission device 271...Input circuit 272...Code setting circuit 273...Logic circuit 274...Series transmission device 275...CPU for serial transmission

Claims (4)

[Claims] Claim 1: A primary coil of a multiphase AC linear motor installed along a running path formed in a building, and a secondary coil of a linear motor installed for each of a plurality of cars arranged on the running path. In a control device for a self-propelled elevator that generates thrust by magnetic force between a conductor and causes the car to travel on a traveling path, a power source that controls the supply of power for driving the car. A control device is installed for the number of cars, the primary coil of the linear motor is divided into a plurality of sections, and the primary coil for each divided section is selected to supply the drive power from the power supply control device to the section selection switch. and a signal transmission device for transmitting a selection command signal outputted from the power supply control device of each car to the section selection switch of each section as a code signal. Device. 2. The control device for a self-propelled elevator according to claim 1, wherein a common parallel transmission signal is used as the selection command signal and is transmitted to each section selection switch. control device. 3. The control device for a self-propelled elevator according to claim 1, wherein a serial transmission signal is used as the selection command signal and is transmitted to each section selection switch. Device. 4. The control device for a self-propelled elevator according to claim 2 or 3, wherein the transmission signal is used to select a car from a car so that two or more adjacent sections are selected for the same selection code. A control device for a self-propelled elevator that includes an information signal regarding the traveling direction of the elevator.