JPH0986885A - Crane device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve safety and reliability, miniaturize and reduce its cost by realizing the variable speed crane control of a wireless operation by a simple circuit constitution. SOLUTION: A receiving part 33 in a control board 36 receives a wireless signal sent from a wireless transmitter 35 and converts to the series operation signal of a week current system. A inverter main control part 32 takes in this operation signal and controls an inverter main circuit part 31. As the control system from a transmitter upto the main control part handles all signals of the week current system, the processing by a series data can be carried out and a simple circuit, miniaturization and cost reduction can be carried out. As a mechanical contact point is not required, safety and reliability are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane device using an electric hoist or other electric hoist, and more particularly to a variable speed control of an electric hoist, an electric traverse device, an electric traveling device and the like by wireless remote control. The present invention relates to a suitable control device.

[0002]

2. Description of the Related Art An overhead crane device equipped with an electric hoist or other electric hoist, an electric traverse device and an electric traveling device is used for cushion start and stop operations for reducing swing and impact of suspended loads and for improving work efficiency. Therefore, the number of cases in which the operating speed is controlled at a variable speed is increasing. In addition, in order to secure work safety and improve operability and workability, there are an increasing number of cases in which control operation is changed from pushbutton switch operation with a cable to wireless remote operation.

Generally, for variable speed control, inverter control is used to supply power to the drive motor, and for wireless remote operation, a commercially available weak radio wave system or specific low power system tele control is used. Products (hereinafter called "telecon") are used.

4 to 8 are block diagrams of a control device for a hoisting machine in a conventional crane device.

FIG. 4 shows that the push button switch device 4 is turned on.
FIG. 3 is a block diagram of a control system of a standard hoist 1 for operating a hoisting drive motor 3 by converting an operation signal generated by an off operation into on / off of a drive current by a magnet switch 5 in a control panel 2.

As shown in FIG. 5, the conventional variable speed hoist 6 uses a commercially available general-purpose inverter device 7 in place of the magnet switch 5 in order to operate the hoisting drive motor 3 at a variable speed. The general-purpose inverter device 7 includes a main circuit section 8 having a power control element for intermittently controlling a motor drive current, a main control section 9 for controlling on / off timing of the power control element of the main circuit section 8, and the main control section. A power supply unit 10 for supplying power to 9 is provided. Further, in order to operate the general-purpose inverter device 7 based on the interface unit 13 that converts the operation signal of the AC200V system generated by the push button switch device 4 into the operation signal of the weak electric system and the weak electric system operation signal obtained by the conversion. It is necessary to equip the control panel 14 with the auxiliary control unit 12 for controlling the speed data, motor rotation direction data, safety interlock, and the like. Further, a dedicated power supply unit 11 for operating the auxiliary control unit 12 is also required.

A variable speed hoist 20 using a dedicated inverter device 15 dedicated to the hoist instead of the commercially available general-purpose inverter device 7 is controlled by a set of a main control unit 18 and a power supply unit 17, as shown in FIG. Although there is an advantage that the circuit section 16 can be controlled, the AC200V type push button interface 19 for converting the high electric system operation signal from the push button switch device 4 into the weak electric system operation signal is necessary.

When remotely controlling the hoist 6 shown in FIG. 5 by radio, as shown in FIG. 7, a teleconverter receiver 25 and a teleconverter transmitter 26 are provided instead of the push button switch device 4, and Hoist 2 shown in FIG.
When 0 is wirelessly controlled remotely, as shown in FIG. 8, a teleconverter receiver 25 and a teleconverter transmitter 26 are provided instead of the push button switch device 4.

The teleconverter receiver 25 includes an antenna section 24.
The wireless operation signal received from the wireless transmitter 26 is detected by the receiving unit 27 and converted into a voltage, and the teleconverter main control unit 22 checks the address data of the transmitter 26 and the receiving device 25 for preventing malfunction, and transmits the transmitted data. The transmission data is serial / parallel converted by performing a parity check or the like, converted into an AC200V operation signal in the relay interface unit 21, and output to the hoist control system. In the current tele-con products, the push button interface of the hoist is generally AC200V, so all AC2
It is a 00V relay interface. Figure 7
And the hoist shown in FIG. 8 are both AC200V
System interface is required. Further, since the teleconverter device is an independent device different from the hoist, the teleconverter power supply unit 23 is also provided.

[0010]

In the conventional hoist device configured as described above, the operation signal from the teleconverter transmitter is processed by the weak electric system signal inside the teleconverter receiver, but the hoist controller and the interface are processed. In order to do so, it is necessary to once convert it into a high voltage system signal of AC200V system. For this reason, a relay for switching the AC200V system circuit and a circuit for the number of operation signals for returning the AC200V system signal to the weak electric system signal are required, and the number of operation signal circuits is extremely small when speed control is performed finely. However, there is a problem that the size of the device becomes large and the cost is high.In addition, since mechanical contacts are present, the danger of crane runaway due to welding of these contacts increases and safety is increased. It was a cause of many problems such as reliability problems.

An object of the present invention is to provide a control device for a crane device that solves these problems.

Specifically, it is to enhance safety and reliability without interposing a mechanical contact for converting a high-voltage system signal in a transmission path of an operation signal received as a radio signal.

Another object of the present invention is to reduce the size of the circuit and realize the miniaturization and cost reduction of the device.

[0014]

The present invention relates to a hoisting machine, a traverse device for traversing the hoisting machine, a traveling device for traveling a girder mechanism equipped with the traverse device and the hoisting machine, and the hoisting machine. Speed control device including a main circuit part for controlling power supply to a drive motor for driving at least one of a motor, a traverse device, and a traveling device, and a main control part for controlling the main circuit part, and an operation In a crane device including a wireless operation device for remotely controlling the speed control device by converting a signal into a wireless signal and transmitting the signal, one feature is that the speed control device receives the wireless signal and performs the operation. A receiving unit for reproducing a signal is provided, and the main control unit takes in the operation signal reproduced by the receiving unit to control the main circuit unit.

Another feature is that the speed control includes an inverter main circuit section for controlling power supply to a drive motor for driving a hoisting machine to control a variable speed and a main control section for controlling the inverter main circuit section. In a crane device including a device and a wireless operation device for remotely controlling the speed control device by converting an operation signal into a wireless signal and transmitting the operation signal, the wireless operation device is provided with an operation signal for operating the hoisting machine. A push-button switch that is generated and a signal conversion processing unit that converts the operation signal into a wireless operation signal are provided, and the speed control device includes a reception unit that receives the wireless signal and reproduces the operation signal. The control unit may take in the operation signal reproduced by the receiving unit and control the inverter main circuit unit.

The wireless operation device includes a plurality of push button switches that generate operation signals for operating the hoisting machine, the traverse device, and the traveling device, and a wireless radio device that operates the operation signals in series according to the push button switches. It is characterized by comprising a signal conversion processing unit for converting into an operation signal.

Further, the main control unit is provided with a microcomputer, and the receiving unit reproduces an operation signal to an input signal voltage level of the microcomputer.

[0018]

The main control unit in the speed control device controls the main circuit unit by sequentially fetching the series operation signals of the weak electric system reproduced by receiving the radio signal and controls the main circuit unit. The reliability and reliability are improved, and the circuit scale is reduced to enable downsizing and cost reduction.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the block diagrams shown in FIGS.

FIG. 1 shows a control device for a hoisting machine in a crane device. The receiving unit 33 in the control panel 36 of the hoist 30, which is a hoisting machine, reproduces a data signal from the wireless signal from the wireless transmitter 35 received by the antenna 24 and outputs it to the main control unit 32. The main control unit 32 processes this data signal, decodes the operation signal, and outputs a control signal for controlling the on / off timing of the power control element in the inverter main circuit unit 31. Hoisting drive motor 3
Operates at a variable speed using the output of the inverter main circuit unit 31 as a power source. Inverter main controller 32 and receiver 33
Receives power from the power supply unit 34.

Next, the wireless transmitter 35 and the control panel 36
Will be described in detail with reference to FIG.

The wireless transmitter 35 converts the operation signal generated by the push button switch device 42 from parallel data to serial data in the transmitter main control section 41, and adds serial address data and parity check data of the transmitter. It is output to the wireless transmission unit 40 as a digital data signal. The wireless transmission unit 40 converts this serial digital data signal into a radio wave signal and emits it from the antenna 51. It should be noted that each circuit in the wireless transmitter 35 is a weak electric system signal circuit which is operated by the power source of the battery 43, and in this embodiment, a DC 5V system circuit is adopted.

The emitted radio signal propagates through the air and is received by the receiving antenna 24 of the hoist control board 36.

The receiving section 33 in the control panel 36 detects the received radio wave signal in the radio wave detecting section 50,
The voltage converter 49 reproduces a weak electric series digital data signal. In this embodiment, a DC5V system is adopted.

The microcomputer 48 in the main controller 32 inputs the voltage-converted digital data signal as it is as serial data. The microcomputer 48 includes a transmitter 35 and a receiver 33 for preventing malfunction.
Each side address data is checked, the transmission data is checked for parity, and the operation signal is checked to convert it into a control signal for controlling the on / off timing of the power control element of the inverter main circuit unit 31. The photocoupler interface section 47 supplies the control signal to the power control element unit 46 of the inverter main circuit section 31.
The power control element unit 4 of this inverter main circuit section 31
6 adopts an IPM (intelligent power module) in this embodiment.

The inverter main circuit section 31 includes a three-phase AC2.
The 00V power source is rectified by the diode module 44, smoothed by the capacitor 45, and converted into a DC power source. The power control element of the power control element unit 46 connects this DC power source to P
The WM (pulse width modulation) control is switched and supplied to the hoisting drive motor 3 to control the drive motor 3 at a variable speed.

The internal power supply unit 34 is a switching type power supply circuit using the DC power supply as a primary power supply.

Although the above description has been made entirely for the hoisting portion of the crane device, the overall control device for the crane device according to the present invention will now be described with reference to FIG. Here, the hoisting control unit 69 that controls the hoisting drive motor 3 at a variable speed is the control panel 3 described with reference to FIG.
This corresponds to 6.

The traverse control unit 63 in the traverse device for traversing the suspended load (hoist) is constructed in the same manner as the control panel 36 excluding the receiving part 33, and includes an inverter auxiliary control part 64, a power source part 66, A traverse inverter main circuit unit 65 is provided, and power supply to the traverse drive motor 62 is controlled to operate at variable speed. The hoist 60 in this embodiment has a traverse device in which a hoist and a traverse device are integrally connected, and the hoist control unit 69 and the traverse control unit 63 are arranged on one control panel 61.

The traveling control unit 71 in the traveling device 68 for traveling the suspended load (hoist) has the same structure as the traverse control unit 63 of the traverse device described above, and includes an inverter auxiliary control unit 74 and a traveling inverter main unit. A drive motor 67 for traveling, which includes a circuit section 75 and a power supply section 76.
It controls the power supply to and operates this at a variable speed.

Operation signals to the traverse control unit 63 and the traveling control unit 71 are supplied from the main control section 32 of the hoisting control unit 69.

In the thus constructed crane apparatus, the main control section 32 of the hoisting control unit 69 takes in the serial data signal including the hoisting operation signal, the traverse operation signal and the traveling operation signal received by the receiving section 33. To perform comprehensive signal processing. The hoisting operation signal is used by the main control unit 32 itself to control the inverter main circuit unit 31. Then, regarding the traverse operation signal and the travel operation signal, the traverse control unit 63 and the travel control unit 7
Distribute to 1.

In the traverse control unit 63 to which the traverse operation signal is distributed, the inverter auxiliary control unit 64 controls the traverse inverter main circuit unit 65 in accordance with the operation signal to execute the traverse speed control of the traverse device. In the travel control unit 71 to which the travel operation signal is distributed, the inverter auxiliary control unit 74 controls the travel inverter main circuit unit 75 according to the operation signal to execute the travel speed control of the travel device.

According to such a crane device, the main control unit 32 directly takes in the serial data signal of the weak electric system received and reproduced by the receiving unit 33 and executes the control process.
Since it is not necessary to interpose a mechanical contact point in the signal system, safety and reliability are improved, and in the hoisting control unit 69, the variable speed control section and the wireless control section are independent of the main control section and the power supply section. Since they can be shared as a set, the effects of downsizing and cost reduction can be obtained.

The inverter auxiliary control unit 64 of the traverse control unit 63 and the inverter auxiliary control unit 74 of the traveling control unit 71 directly take in the data signal received and reproduced by the receiving unit 33 from the receiving unit 33 and perform control processing. It is also possible to execute.

Further, the traverse control unit 63 mounted on the same control panel 61 as the hoist control unit 69 includes a power source section 66.
Alternatively, the electric power may be supplied from the power supply unit 34 in the hoisting control unit 69.

Furthermore, the inverter main circuit portions 31, 6 are
5,75 can be replaced by various control means using a silicon control element such as a triac.

Furthermore, the crane device of the present invention can be applied to a device having neither a traverse device nor a traveling device, or both of them, and the commercial power source voltage is AC2.
Not limited to 00V, it can be implemented using a power source having a voltage other than AC200V.

[0039]

Since the main control unit in the speed control device according to the present invention takes in the operation signal of the weak electric system which receives and reproduces the radio signal to control the main circuit unit, the interface having a plurality of mechanical contacts is provided. Is unnecessary, safety and reliability are improved, and the circuit scale is reduced to enable downsizing and cost reduction.

[Brief description of drawings]

FIG. 1 is a block diagram of a control system of a hoisting machine section in a crane device according to the present invention.

FIG. 2 is a block diagram showing in detail the internal configuration of the control device shown in FIG.

FIG. 3 is a block diagram showing an entire control system in the crane apparatus according to the present invention.

FIG. 4 is a block diagram of a conventional standard hoist control system.

FIG. 5 is a block diagram of a conventional control system for a variable speed hoist.

FIG. 6 is a block diagram of a conventional control system for a variable speed hoist.

FIG. 7 is a block diagram of a conventional control system for a variable speed hoist by wireless remote control.

FIG. 8 is a block diagram of a control system for a conventional variable speed hoist by wireless remote control.

[Explanation of symbols]

 3 Hoisting drive motor 24 Antenna part 30 Hoist 31 Inverter main circuit part 32 Inverter main control part 33 Receiving part 34 Power supply part 35 Radio transmitter 36 Control panel

Front page continuation (72) Inventor Yukihiro Inaba 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Hitachi Electric Co., Ltd. Electric Appliances Division, Taga Headquarters (72) Inventor Satoshi Ishikawa 1-chome, Higashitaga-cho, Hitachi-shi, Ibaraki 1-1 No. 1 in Taga Headquarters, Electric Appliances Division, Hitachi, Ltd. (72) Inventor Kazumasa Saito 1-1-1, Higashitaga-cho, Hitachi, Hitachi, Ibaraki Within Taga Headquarters, Electrical Equipment Division, Hitachi, Ltd. (72) Inventor Masayoshi Nakamura 1-1-1, Higashitaga-cho, Hitachi-shi, Ibaraki Ltd. Inside the Taga Headquarters, Electric Equipment Division, Hitachi, Ltd.

Claims (8)

[Claims] 1. A hoisting machine, a traverse device for traversing the hoisting machine, a traveling device for traveling a girder mechanism equipped with the traversing device and the hoisting machine, and a hoisting machine, a traversing device, and a traveling device. A speed control device including a main circuit unit that controls power supply to a drive motor that drives at least one to control a variable speed, and a main control unit that controls the main circuit unit; and an operation signal converted into a wireless signal. In a crane device including a wireless operation device that remotely controls the speed control device by transmitting, the speed control device includes a reception unit that receives the wireless signal and reproduces the operation signal, and the main control unit Is a crane device that takes in the operation signal reproduced by the receiving unit and controls the main circuit unit. 2. The wireless operation device according to claim 1, wherein the wireless operation device includes a plurality of push button switches for generating operation signals for operating the hoisting machine, the traverse device, and the traveling device, and the operation signals to the push button switches. A crane device comprising a signal conversion processing unit for converting a corresponding serial wireless operation signal. 3. The crane apparatus according to claim 1, wherein the main control unit includes a microcomputer, and the receiving unit reproduces an operation signal at an input signal voltage level of the microcomputer. 4. A hoist, a traverse device for traversing the hoist, a traveling device for traveling a girder mechanism equipped with the traverse device and the hoist, and the hoist, traverse device, and traveling device. A speed control device including an inverter main circuit section that controls power supply to a drive motor that drives at least one to perform variable speed control, and a main control section that controls the inverter main circuit section, and converts an operation signal into a wireless signal. In a crane device including a wireless operation device that remotely controls the speed control device by transmitting the speed control device, the speed control device includes a receiving unit that receives the wireless signal and reproduces the operation signal, The crane device, wherein the control unit takes in the operation signal reproduced by the receiving unit and controls the inverter main circuit unit. 5. The wireless operation device according to claim 4, wherein the wireless operation device includes a plurality of push button switches for generating operation signals for operating the hoisting machine, the traverse device, and the traveling device, and the operation signals to the push button switches. A crane device comprising a signal conversion processing unit for converting a corresponding wireless operation signal. 6. The crane apparatus according to claim 4, wherein the main control section includes a microcomputer, and the receiving section reproduces an operation signal at an input signal voltage level of the microcomputer. 7. A speed control device including an inverter main circuit section for controlling power supply to a drive motor for driving a hoisting machine to control a variable speed and a main control section for controlling the inverter main circuit section, and an operation signal. In a crane device provided with a wireless operation device for remotely controlling the speed control device by converting to a wireless signal, the wireless operation device is a push button switch for generating an operation signal for operating the hoisting machine. And a signal conversion processing unit that converts the operation signal into a wireless operation signal, the speed control device includes a reception unit that receives the wireless operation signal and reproduces the operation signal, and the main control unit is the A crane device for controlling the inverter main circuit unit by taking in the operation signal reproduced by a receiving unit. 8. The crane apparatus according to claim 7, wherein the main control unit includes a microcomputer, and the receiving unit reproduces an operation signal at an input signal voltage level of the microcomputer.