KR200342940Y1 - Crane control machine - Google Patents

Abstract

The present invention relates to a crane control device, which aims at minimizing malfunctions and failures due to disconnection during crane control, reducing production staff, providing basic contents for automation, and reducing the size of equipment. It is done.

Crane control apparatus according to the present invention, the signal generated from the signal generating unit consisting of a PCB module embedded in the control box, and a sensor unit mounted on the PCB module for sensing various data for controlling the operation of the crane According to the present invention, the microcomputer 100 includes a built-in program for operating a crane. The microcomputer includes an input unit 110 to which a signal generated through the signal generator is input, and a signal input through the input unit. Based on the control / load calculation unit 120 for controlling the driving of the crane, the display unit 130 and the output unit for driving the crane driving motor according to the control of the control / load calculation unit.

Description

Crane Control Unit {CRANE CONTROL MACHINE}

The present invention relates to a crane control device, and more particularly, to a crane control device to minimize the malfunction / failure due to disconnection in the control of the crane, and to reduce the size of the device.

In general, a crane (crane, crane) is a generic name of a mechanical device that can lift the cargo using power to move it horizontally, it is classified as a crane, mobile crane, derrick, cargo lifting device. Among these, overhead traveling crane mainly carries cargo (moving north-south) and traverses (east-west) while traveling parallel to the ceiling of factories, warehouses, or outdoor storage spaces. This crane is used for transporting heavy materials in buildings such as factories and power plants, and for unloading heavy materials such as coal and ores in outdoor storage. Is also used.

As shown in Figure 1, such a ceiling crane (1) is a heavy chain moving object, that is, a bucket (bucket, mainly unsoiled ore, such as soil or ore that serves to walk for the lifting of the cargo between the cargo and the crane) Power supply unit (2) comprising a tong (2) consisting of a hook or a hook (mainly used for heavy materials such as machinery or construction members), a drive unit for moving the tong device (2), supplying power to the drive unit And a power supply unit, a pendant switch for operating the drive unit, an input device such as a remote controller, and a controller for controlling each of the drive units by an input signal from the input device.

The drive unit is a hoist unit for hoisting (raising or lowering) the cargo contained in the tongs device 2, and a traverse for moving the tongs device 2 along the east-west guide rail 3 in the east-west direction. ), A travel unit for moving the east-west direction guide rail 3 together with the tong device 2 through the north-south direction guide rails 4 in the north-south direction.

The hoisting / lowering drive unit, the traveling drive unit, and the transverse driving unit are each composed of a contact point relay by a controller and a sequence. At this time, the hoisting / lowering part and the transverse part are installed in one hoist control box 5 on the moving structure of the tong device 2, and the traveling part is installed in the traveling control box separately from these.

In addition, since the crane is to transport heavy objects, a load limiter that is classified as a dangerous goods machine and inspected by the Korea Occupational Safety and Health Agency should be installed. The load limiter (6) serves to stop the machine in order to protect the mechanism and eliminate the risk of industrial accidents when transporting a load heavier than the limit load of the crane, the outside of the hoist control box (5) It is installed on the hoist controller and is electrically connected through wire.

However, the crane according to the prior art has the following problems.

The hoist controller, travel controller, traverse controller and each drive unit are in contact contact form by sequence control through a contact relay, and the load limiter also takes a contact action form with the controller. As the connection ring of the wire connecting each contact is easily broken by the vibration generated during the movement of the crane, there is a disadvantage in that failure due to disconnection occurs frequently.

Therefore, since the wiring must be wired so that the wire connection is not disconnected when the crane moves, the labor cost is increased because the wiring work is dependent on skilled workers, and the size of a device such as a control box is increased to accommodate the wire.

The present invention is to solve the above-mentioned conventional problems, using only the necessary wires for the drive unit and the controller for driving the crane, the wires for control are connected in a wireless manner as possible to prevent malfunction due to disconnection The aim is to provide a crane control that can be prevented.

In addition, another object of the present invention is to reduce the manufacturing cost and to reduce the size of the device to be able to manufacture even unskilled workers.

1 is a perspective view of an excerpt of a typical ceiling crane.

2 is a block diagram of a crane control device according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: input device, 20: load limiter sensor

30: current detector, 40: encoder for rotational speed detection

100: microcomputer, 110: input unit

111: sensor input unit, 112: parameter input unit

120: control / load calculation unit, 130: display unit

140: output unit, 141: hoisting / lowering

142: transverse section, 143: running section

The present invention provided to achieve the above object is a PCB module embedded in the control box; The microcomputer is mounted on the PCB module and includes a microcomputer in which a program for operating the crane is mounted in accordance with a signal generated from a signal generator configured to detect various data for controlling the driving of the crane. The microcomputer may include an input unit to which a signal generated through the signal generator is input, a control / load calculation unit that controls driving of the crane based on a signal input through the input unit, a display unit, and the control / load calculation unit It is composed of an output unit for driving the crane driving motor according to the control.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims are defined in the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her own design. It must be interpreted to mean meanings and concepts.

As shown in Figure 1, the crane control apparatus according to the present invention, a PCB module (not shown) mounted in the control box not shown, and the signal generation to be mounted on the PCB module to generate a signal for the operation of the crane According to the negative signal, the microcomputer 100 includes a program for controlling the driving means (for example, the driving motor M) of the crane.

The signal generator is mounted on an input device 10 such as a pendant switch or a remote controller and the PCB module and connected to the load end of the crane to apply a signal to the microcomputer 100 when the load of the crane is greater than or equal to a predetermined weight. The microcomputer 100 includes a load limiter sensor unit 20 for stopping the operation of the crane.

The load limiter sensor 20 detects the load current flowing through the motor when the rated load is applied at the initial test run of the crane (industry completion inspection of the Korea Occupational Safety and Health Agency), and protects the mechanical mechanism when the current flowing higher than the set current value is higher. And by applying a signal to the microcomputer 100 in order to prevent industrial accidents, it is mounted on the PCB module. That is, when the overload signal is applied from the load limiter sensor 20, the microcomputer 100 stops the hoisting, traversing and traveling operation functions through the output unit 140 to be described later and controls only the pulling operation.

The microcomputer 100 includes an input unit 110, a control / load calculation unit 120, a display unit 130, and an output unit 140.

The input unit 110 is divided into a sensor input unit 111 and a parameter input unit 112.

The sensor input unit 111 receives the general items for controlling the crane and inputs them to the control / load calculation unit 120. For example, the operation operation signal of the crane applied from the input device 10 and the load limiter sensor 20. Load of the moving object to be applied from the current value applied in real time to the crane driving motor (M) detected through the current detector 30 and rotation of the motor drive shaft applied from the rotation speed detection encoder 40 to be described later The number and the like are received and transmitted to the control / load calculation unit 120.

The parameter input unit 112 inputs and modifies the limit load input through the parameter input key 121, and allows only the relevant person to use the password. The parameter input key 113 may be composed of up, down, left, right, enter key, and program key.

The control and load calculating unit 120 controls the driving of the crane driving means, for example, the driving motor M, based on the value input through the input unit 110.

The display unit 130 outputs the state, position, and the like of the crane.

The output part 140 is a part for operating a crane, and is divided into the lifting / lowering part 141, the transverse part 142, and the travel part 143. FIG. The hoist / lower part 141 is for hoist control to operate within a limited range (a state in which an up final limit switch is not operated) by receiving a command of hoisting and lowering commanded by the input device 10. The magnetic contactor 150 (magnetic contactor) is controlled, and the transverse portion 142 receives a command in the east direction and the west direction by the manipulation of the input device 10 (front and back limit switches (front / back) limit the magnetic contactor 150 for the lateral control to enable operation within the state (operation of the limit switch), and the driving unit 143 receives the south / north running command commanded by the input device 10 to limit the range The driving control magnetic contactor 150 is controlled to allow driving in the state (the right and left final limit switches are not operated).

Here, the hoist / lower part 141 and the transverse part 142 are provided in one hoist control box, and the traveling part 143 controls the traveling part separately from the hoist / lower part 141 and the transverse part 142 operations. Although performed in a box, the control state is performed in the microcomputer 100, and the power is performed in a separate driving control box. This is because the hoisting / lowering and traversing (east-west direction) operation is performed in the hoist control box, and the traveling (north-south direction) operation is performed in the traveling control box due to the characteristics of the crane.

Although the magnetic contactor 150 for the hoisting / lowering part 141, the transverse part 142, and the driving part 143 is illustrated as one in the drawing, the magnetic contactor 150 is divided by each operation.

In the present invention, a function of transmitting data to the computer or another crane on the ground by wireless or wired various data performed by the input unit 110, the control / load operation unit 120, the display unit 130 and the output unit 140 The communication unit 160 may be further included.

The crane control apparatus according to the present invention can detect and display the position of the crane, and for this purpose, the motor M for driving the crane (wherein, the motor M is a hoisting / lowering motor, a motor for the traverse part, and traveling). In the drive shaft of the auxiliary motor), an encoder 40 for detecting a speed of detecting the rotational speed of each drive shaft and inputting it to the sensor input unit 111 is provided, and the control / load of the microcomputer 100 is provided. The calculating unit 120 converts the rotational speed of the motor drive shaft input from the rotational speed detection encoder 40 into the moving distance of the crane so that the screen is output to the worker computer.

In addition, the present invention recognizes the rated current of the motor M, the overload capacity, the current value flowing in real time through the current detector 30 in order to protect the motor (M) generating power to compare and analyze with various motor-related data Therefore, if an abnormal current flows in the motor, stop the motor (M), output a fault signal, remember the fault value, and use it for future maintenance data.

The operation of the crane control apparatus according to the present invention configured as described above will be described.

Before using the crane to which the crane control device according to the present invention is applied, the limit load is set by operating the parameter input key 113. At this time, set the limit load after authentication by inputting a password to prevent setting the limit load except the person concerned.

The operator manipulates the input device 10 such as a pendant switch or a remote controller to move the moving object. By operating the input device 10, the crane can be operated in the order of north-south direction, east-west direction and up-down direction. First, when the north-south direction key is selected, the sensor input unit 10 of the microcomputer 100 recognizes an input signal and transmits it to the control / load calculation unit 120, and the control / load calculation unit 120 outputs the output unit ( The driving unit 143 (the north-south direction) of the 140 is controlled, and the driving unit 143 controls the magnetic contactor 150 to move the crane in the north-south direction. Subsequently, by moving the east-west and up-down keys to move the crane in the east-west and up-down directions, the moving object is fixed to the tongs device.

In this manner, the object to be hooked on the hook (tweezer device) is fixed and then the object to be moved is moved by moving the crane based on the above-described method.

While the moving object is being moved by the driving force of the motor M, the rotation speed detection encoder 40 provided on the drive shaft of each motor M detects the rotation speed of the drive shaft, and the control / rod calculation unit 120 The position of the crane is calculated by converting the detected rotational speed into a moving distance, and the position is displayed on the screen in real time. Therefore, the operator can visually confirm the operation and malfunction of the crane movement while visually confirming the position of the crane displayed on the monitor of the work computer.

On the other hand, when a moving object is fixed to a tong device such as a hook, the load limiter sensor 20 inputs a loading load fixed to the hook (or tong device) to the sensor input unit 111, and if it is input to the sensor input unit 111. If the current load is greater than the limit load input through the parameter input unit 112, the control / load calculation unit 120 to stop the function of hoisting, east-west and north-south operation through the output to prevent the accident, only the lowering operation The output unit 140 is controlled to control the output unit 140.

In addition, the control / load calculation unit 120 compares the current value applied through the current detector 30 with the reference current value, and if the motor M is overloaded or an abnormal current flows during the operation of the device, Stop the drive.

As described above, according to the crane control apparatus according to the present invention, the microcomputer with a program for driving the crane is mounted on the PCB module, and the wires are greatly reduced except for the necessity of connection, thus, the crane Even if vibration occurs during movement, the failure rate at which the wire connection is disconnected is lowered, thereby improving the reliability of the product. In addition, by reducing the failure rate during operation of the crane it is possible to shorten the downtime of the crane to improve the productivity.

In addition, unskilled workers can be easily manufactured to drive cranes, which can reduce labor costs for manufacturing and maintenance.

The invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, but the invention is not limited to the configuration and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

Claims (6)

A PCB module embedded in the control box; In addition, the microcomputer 100 is mounted on the PCB module and includes a microcomputer 100 having a program for operating the crane according to a signal generated from a signal generation unit including a sensor unit for sensing various data for controlling the driving of the crane. The microcomputer may include an input unit 110 to which a signal generated through the signal generator is input, a control / load operator 120 to control driving of the crane based on a signal input through the input unit, and a display. Crane control device, characterized in that consisting of an output unit for driving the crane driving motor according to the control of the control unit 130 and the control / load calculation unit. The sensor of claim 1, wherein the sensor unit of the signal generating unit is connected to the load end of the crane to apply an overload signal to the microcomputer when the overload (when the limit load is exceeded) to cause the microcomputer to stop the operation of the crane. And a load limiter sensor (20) for detecting the current applied to the driving motor (30). The sensor input unit of claim 2, wherein the input unit receives a driving / stop signal of a crane by an operation of the input device 10, a load value by the load limiter sensor 20, and a current by the current detector 30. (111) and a parameter control unit 112 for setting the limit load. The crane control apparatus according to claim 1, wherein the output unit comprises a hoist / lower part for hoisting and hoisting a crane, a transverse part for moving the crane in the east-west direction, and a traveling part for moving the crane in the north-south direction. . 5. The apparatus as claimed in any one of claims 1 to 4, further comprising rotation speed sensing means installed on the drive shaft of the motor to detect the rotation speed of the drive shaft, wherein the control / rod calculation unit comprises the rotation speed sensing means. The crane control device, characterized in that for calculating the movement distance of the crane on the basis of the rotation speed of each motor drive shaft input through the screen and outputs the position of the crane on the operator monitor. The crane of claim 1, wherein the microcomputer further comprises a communication unit configured to transmit data performed by the input unit, the control / load calculation unit, the output unit, and the display unit to a worker computer via wired / wireless communication. Control unit.