KR100534716B1 - Apparatus amending velocity deflection of friction roll conveyor and method thereof - Google Patents

Abstract

The friction roll conveyor speed deviation correction device of the present invention compares the existing set cycle time with the actually detected cycle time, and changes the conveyor speed to change the frequency command value of the inverter to correspond to the cycle time at the actual detection time. Main line control panel (PLC) 1, which controls, monitors and stores data, and interlocks with associated conveyors and standalone equipment, and a PLC CPU that acts as a brain for operating the devices in the line within the main line control panel ( 3) PLC I / O (5) processing various input / output signals in this PLC, inverter (7) receiving signals and electric signals from this PLC I / O, and driven by the rotation speed regulated by this interleaver By the drive motor 9 which generates rotational power, the friction roll 11 which pushes a trolley | bogie with frictional force by the power transmitted from this drive motor, and this friction roll Ryeona is composed of the balance sensing sensor 15 for sensing the passage of the vehicle (13) to detect the current cycle time of the vehicle.

Description

Friction roll conveyor speed deviation correction device and its method {APPARATUS AMENDING VELOCITY DEFLECTION OF FRICTION ROLL CONVEYOR AND METHOD THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction roll conveyor speed deviation correction device and a method thereof, and more particularly, a friction roll conveyor speed deviation correction that compares an existing set cycle time with an actually detected cycle time to change an inverter frequency command value. An apparatus and a method thereof are provided.

Generally, a friction roll conveyor apparatus is comprised from a main control panel, PLC CPU, PLC I / O, an inverter, a drive motor, a drive roller, and a trolley | bogie.

The main line control panel (PLC) is configured to control conveyor speed, monitor and store data, and to interlock with associated conveyors and standalone equipment.

The PLC CPU is configured to act as a brain for operating the devices of the line in the main line control panel.

The PLC I / O is configured to process various input / output signals in the PLC.

The inverter is configured to apply a signal and electricity to the drive motor to adjust the rotation speed of the drive motor.

The drive motor is configured to generate rotational power using electrical energy.

The drive roller is configured to push the trolley with frictional force from the power transmitted from the drive motor.

And the trolley | bogie is comprised with the general image processing apparatus.

In the friction roll conveyor apparatus configured as described above, when the production conditions change, the operator transmits the replacement cycle time command data to the PLC CPU connected to the network while watching the monitor on the main line control panel.

The PLC CPU that has received this command data commands the inverter to rotate in accordance with the parameters already set.

The inverter commanded by this rotational frequency transmits a constant voltage current to the drive motor.

The drive motor receiving this voltage current is driven to drive the conveyor at constant speed.

When the conveyor driven in this way is operated, the operator detects the actual conveyor speed according to the change in the load state, the wear state of the friction roll, and the like.

The operator then corrects the cycle time. That is, the operator corrects the cycle time by changing the frequency command value of the inverter.

In addition, the operator corrects this cycle time every time the state changes, such as wear and replacement of the conveyor friction roll, and stores this correction value in memory until the next change.

Such friction roll conveyor speed deviation correction method has a problem that the maintenance efficiency and reliability is lowered because the conveyor speed is corrected by the operator after checking the friction roll replacement and wear condition, after adjusting the cycle time.

In addition, the correction method has a problem that the management efficiency is low, causing a factor in the utilization rate due to the deviation of the existing conveyor cycle time, it is difficult to recognize when the bottleneck process occurs, causing a decrease in the operation rate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to compare an existing set cycle time with an actually detected cycle time, and to change the frequency command value of the inverter to correspond to the cycle time of the actual detection time. Friction roll conveyor speed deviation correction apparatus and method thereof are provided.

Friction roll conveyor speed deviation correction device of the present invention,

Main Line Control Panel (PLC), which controls conveyor speed, monitors and stores data, and interlocks with associated conveyors and standalone equipment,

PLC CPU which acts as a brain for operating the devices of the line in the main line control panel,

PLC I / O for processing various input and output signals in the PLC,

An inverter receiving a signal and an electrical signal from the PLC I / O,

A drive motor driven by the rotation speed controlled by the interleaver to generate rotational power;

Friction roll for pushing the trolley with friction force from the power transmitted from the drive motor, and

And a balance detecting sensor for detecting the passage of the balance so as to detect the current cycle time of the balance being pushed by the friction roll.

The balance detection sensor is preferably composed of a proximity sensor using a magnetic field is electrically connected to the PLC.

In addition, the friction roll conveyor speed deviation correction method of the present invention,

Input stage to input existing set cycle time and actual detected cycle time,

A determination step of determining whether the set cycle time input in the input step is equal to the actual cycle time;

An inverter frequency adjustment step of adjusting an inverter frequency corresponding to an actual cycle time when the determination of the determination step is not satisfied;

A driving motor rotation speed adjusting step of adjusting the rotation speed of the driving motor following the adjustment step; and

And a conveyor driving step of driving the conveyor by driving the driving motor at the rotation speed adjusted in the adjusting step.

In the input step, the actual detection cycle time of the conveyor actually driven by the adjusted inverter frequency and the drive motor speed is continuously input.

Advantages and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

1 is a configuration diagram of a friction roll conveyor speed deviation correction device according to the present invention, by comparing the detection cycle time of the existing set cycle time and the conveyor actually being driven to drive the drive motor at a rotational speed corresponding to the actual cycle time. It is configured to drive the conveyor at a constant speed even when the friction roll is worn and replaced.

The conveyor speed deviation correction device includes a main line control panel (PLC, 1), a PLC CPU (3), a PLC I / O (5), an inverter (7), a drive motor (9), a friction roll (11), a bogie ( 13), and the balance detection sensor (15).

The main line control panel 1 is configured to control the conveyor speed, to store monitoring and data, and to be in charge of interlocking with the related conveyor and independent equipment. This main line control panel 1 incorporates the PLC CPU 3, the PLC I / O 5, and the inverter 7 described above.

The PLC CPU 3 is configured to serve as a brain for operating the devices of the line in the main line control panel 1. Therefore, this PLC CPU 3 is electrically connected to the inverter 5 via the PLC I / O 5.

The PLC I / O 5 processes various input / output signals in the PLC 10. The inverter 7 receives a signal and an electric signal from the PLC I / O 5 to adjust the rotation speed of the drive motor 9.

The drive motor 9 is driven at the rotational speed controlled by the inverter 7 to generate rotational power. This drive motor 9 is preferably provided on both sides of the trolley 13 to move the trolley 13 to a stable structure.

The friction roll 11 receives power from the drive motor 9 to generate friction force with the trolley 13, and is configured to be able to push the trolley 13 with this friction force.

In addition, this friction roll 11 is driven by the drive motor 9 provided in the said both sides, It is preferable to be provided in the both sides of the trolley | bogie 13. This trolley | bogie 13 is comprised with the image processing apparatus.

On the other hand, the balance sensor 15 is configured to detect the current cycle time of the balance 13 pushed by the friction roll 11, the balance 13 to detect the passage of the balance 13 It is provided on one side that passes.

The balance sensor 15 may be formed in various forms, but is preferably configured as a proximity sensor that senses using a magnetic field and is electrically connected to the PLC 1.

In addition, it is preferable that the balance detection dog 17 is provided at both ends of the balance 13 so that the balance detection sensor 15 can accurately detect the cycle time of the balance 13.

The correction method using the correction device configured as described above is as shown in FIG. When production conditions change in a correction device that realizes this correction method, the cycle time command data is transmitted to the PLC CPU 3 connected to the network while watching the monitor from the main line control panel 1 by a worker as in the conventional art.

The PLC CPU 3 commands the rotation frequency to the inverter 7 according to the set parameter. The inverter 7 transmits a constant voltage and current to the drive motor 9 to drive the conveyor at constant speed.

On the other hand, when the load state change and the friction roll 11 are worn, it is controlled by the following correction method.

This friction roll conveyor speed deviation correction method is executed from the input step ST10.

In this input step ST0, the existing set cycle time of the conveyor and the actually detected cycle time are input. The existing set cycle time is set via the graphics panel. The actual detection cycle time is input and output via the PLC I / O 5 by checking the passage of the bogie 13.

In this input step ST10, the balance sensor 15 detects the movement time of one process (pitch) of the conveyor. That is, the moving time of one trolley | bogie 13 is measured, and this moving time is the time which averaged by measuring the moving time of three trolley | bogies.

The determination step ST20 is followed by this input step ST10. This determination step ST20 compares and determines whether the set cycle time input in the input step ST10 is equal to the actual cycle time.

If the set cycle time is equal to the actual cycle time, it is determined that the speed change of the trolley 13 does not occur, and the drive motor 9 is driven in the present state.

 On the other hand, if it is determined that the set cycle time input in the determination step ST20 is not equal to the actual cycle time due to the replacement of the friction roll 11 and the adjustment of the cycle time, the inverter frequency is adjusted in the inverter frequency adjustment step ST30. Done.

This inverter frequency adjusting step ST30 adjusts the inverter frequency corresponding to the actual cycle time of the trolley 13. At this time, the PLC CPU 3 changes the frequency command value in the inverter 7 by comparing or decrementing the value of the set cycle time with the actual cycle time.

Such inverter frequency adjustment is performed every conveyor operation, and the corrected command value is preferably stored and used until the start of sub operation.

This drive frequency adjustment step ST30 is followed by the drive motor rotation speed adjustment step ST40.

The driving motor rotation speed adjusting step ST40 adjusts the rotation speed of the driving motor to correspond to the inverter frequency adjusted as described above.

Following the drive motor rotation speed adjusting step ST40, the conveyor driving step ST50 proceeds. This conveyor drive step ST50 drives the conveyor by driving the drive motor 9 at the rotation speed adjusted in the adjustment steps ST30 and ST40.

As described above, the present invention can efficiently correct the conveyor speed by detecting the actual moving time of the truck with the balance sensor after replacing the friction roll and adjusting the cycle time, and correcting the conveyor speed, thereby increasing the reliability of the correction. Can be.

1 is a block diagram of a friction roll conveyor speed deviation correction apparatus according to the present invention.

Figure 2 is a flow chart of the friction roll conveyor speed deviation correction method according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: main line control panel 3: PLC CPU

5: PLC I / O 7: Inverter

9: drive motor 11: friction roll

13: Balance 15: Balance Detection Sensor

Claims (4)

Main Line Control Panel (PLC), which controls conveyor speed, monitors and stores data, and interlocks with associated conveyors and standalone equipment, PLC CPU which acts as a brain for operating the devices of the line in the main line control panel, PLC I / O for processing various input and output signals in the PLC, An inverter receiving a signal and an electrical signal from the PLC I / O, A drive motor driven by the rotation speed controlled by the interleaver to generate rotational power; Friction roll for pushing the trolley with friction force from the power transmitted from the drive motor, and Friction roll conveyor speed deviation correction device including a balance sensor for detecting the passage of the balance to detect the current cycle time of the balance pushed by the friction roll. The method according to claim 1, The balance detection sensor is composed of a proximity sensor using a magnetic field, friction roll conveyor speed deviation correction device, characterized in that electrically connected to the PLC. Input stage to input existing set cycle time and actual detected cycle time, A determination step of determining whether the set cycle time input in the input step is equal to the actual cycle time; An inverter frequency adjustment step of adjusting an inverter frequency corresponding to an actual cycle time when the determination of the determination step is not satisfied; A driving motor rotation speed adjusting step of adjusting the rotation speed of the driving motor following the adjustment step; and Friction roll conveyor speed deviation correction method comprising a conveyor driving step of driving the conveyor by driving the drive motor the rotation speed adjusted in the adjusting step. The method according to claim 3, And in the inputting step, the actual detection cycle time of the conveyor actually driven by the adjusted inverter frequency and the drive motor speed is continuously input.