KR102008706B1 - The control device for the direction changing device of conveyor and control method thereof - Google Patents

Abstract

The present invention relates to a control device for a direction changing device of a conveyor, which changes the direction of a door-to-door parcel transferred on the conveyor to classify the door-to-door parcel in a desired direction, and a control method thereof. According to the present invention, the control device for a direction changing device of a conveyor comprises: a main PLC unit including a main power distribution unit, a main PLC controlling the speed of the conveyor, tracking the position of a door-to-door parcel, and transmitting door-to-door parcel classification information data received from a server, and an automatic/manual relay switch; a first direction changing device PLC unit including a first power distribution unit, a first direction changing device PLC analyzing the classification information data of the main PLC to control a first direction changing device or transmitting the door-to-door parcel classification information data to each of the following direction changing device PLCs, and an automatic/manual relay switch; and an N^th direction changing device PLC unit including an N^th power distribution unit, an N^th direction changing device PLC receiving the classification information data from the first direction changing device to control a transfer roll, and an automatic/manual relay switch.

Description

Control device and method for controlling the direction changer for conveying conveyors

The present invention relates to a control device and a control method of a direction changer for conveying conveyors for transporting and classifying parcels, such as mail or goods, and more particularly, to change the direction of parcels conveyed from a conveyor to classify them in a desired direction. The present invention relates to a control device and a control method of a turning device for a conveying conveyor used.

In general, in a logistics system using a conveyor, the roller is driven by the controller itself, and it is necessary to move the parcel delivery in a desired direction. In order to achieve this purpose, various control devices and control methods have been proposed for various types of sorting devices such as sorters mounted on a conveyor system.

Looking at the prior art, Patent No. 10-0886389 relates to an apparatus for automatically distinguishing a parcel post, and a method, comprising: a parcel separator; A barcode scanner for scanning barcodes; A repeater for transmitting the barcode value to the size information linking server; A packet separator control computer for controlling the operation of the packet separator; A postal machine statistical management computer for transmitting the divided statistical information to the size information linking server; Receive the barcode value, receive the size information about the parcel post from the size sensor, and perform the size information combining process, the postal code conversion process and the distribution plan volume control process to process the parcel posts in the parcel branch. A size information linking server; A size detecting sensor for detecting a size of the parcel post; A PLC which performs signal processing between the size information linking server and the size detecting sensor; Receives the operation status information from the size information connection server, the encoding display unit for transmitting the operation status and the division plan set by the parcel separator operator to the size information connection server; comprising a, by detecting the size of the parcel post parcel post It provides the efficiency of postal work and reduces the workload by enabling automatic classification.

Korean Patent Laid-Open Publication No. 10-2010-0070799 relates to an article classification system using RFID, comprising: a main conveyor having a plurality of trays each for transporting articles thereon; An induction conveyor for supplying an article with an RFID tag storing information about the article to a tray of a main conveyor; An RFID reader for recognizing article information of the article by reading the RFID tag attached to the article supplied by the induction conveyor; A tray recognition unit that is mapped 1: 1 to the RFID reader and recognizes the tray when an article read by the RFID reader is supplied on a tray of the main conveyor; Moving distance measuring unit for measuring the distance each tray is moved; An article sorter which separates the article from the tray so that the article on the tray being sorted is classified into a sorting box at a predetermined position; And receiving the goods information from the RFID reader, receiving a recognition signal of the tray supplied with the goods from the tray recognition unit, checking the goods supplied to each tray and the goods information, and determining the moving distance value of each tray from the moving distance measuring unit. And a control unit for controlling the operation of the article classification unit to receive and classify the desired article in the classification of the preset position.

Patent No. 10-1687965 relates to a control device for a high speed courier and its control method, wherein a control unit for controlling the DC motor of the LM Guide pivoting the feed roller of the divider so that the courier is classified according to the destination. By separating the control board and the driver board is provided, the technology for the control device for high-speed courier freight separator with low manufacturing cost and excellent performance.

In the case of the direction changeover device, it is necessary to configure the control device based on the PLC in order to increase the capability to change the direction and classify the article.

Registered Patent Publication No. 10-0886389 (registered Feb. 24, 2009) Publication No. 10-2010-0041177 (published April 22, 2010) Publication No. 10-2010-0070799 (published June 28, 2010) Publication No. 10-2016-0076292 (Published June 30, 2016) Patent Registration No. 10-1687965 (December 14, 2016 registration)

The problem to be solved by the present invention in consideration of the above problems is to provide a redirection control device and a control method of the transfer conveyor that can efficiently change the direction of the transfer conveyor can lower the error due to malfunction in the classification of the parcel delivery cargo The purpose.

In addition, an object of the present invention is to achieve the simplification of the control by reducing the number of parts required for the control device through the PLC control.

In order to achieve the above object, the present invention is linked to the server via a network, AC servo motor for pivoting the transfer roller for sorting the parcels delivered through the conveyor according to the destination and AC for rotating the transfer roller A control device for a direction conveyor for a conveying conveyor for controlling a plurality of direction changers having a main motor, the device comprising: a main power distribution unit for supplying and distributing AC power as an external power source, and receiving power from the power distribution unit; Main PLC for controlling the speed of the conveyor, tracking the location of the parcel delivery, and transmitting parcel delivery classification information data received from the server, and for automatic / manual switching of the power distribution unit, the main PLC and the main PLC. A main PLC unit consisting of a mounting case in which a relay switch is mounted; The primary power distribution unit receiving the AC power, which is an external power source, and the parcel delivery classification information data of the main PLC are received first, and the received classification information data is analyzed to control the primary redirection device or the primary Afterwards, the PLC for the primary direction change device for transmitting parcel delivery information data to the PLC for each direction change device, the power distribution unit, the PLC for the primary direction change device, and the PLC for the primary direction change device PLC unit for the primary direction switching device made of a mounting case is mounted / Relay Switch for manual switching; And an N-th order power distribution unit receiving AC power, which is an external power source, a N-th order direction switching device PLC that receives classification information data of parcel delivery cargo from the PLC for the first direction change device, and controls a transfer roller; And a distribution unit, an N-th order turning device PLC unit including a mounting case mounted with a relay switch for automatic / manual switching of the N-th order turning device PLC and the N-th order turning device PLC. It provides a control device of the redirection device for the transfer conveyor.

In the present invention, the PLC unit for the first to N-th order direction switching device, the power distribution unit, the main and control circuit breaker for blocking the over-current, the terminal block to which various cables are connected, and the direction switching device for controlling the direction switching device And a PLC for the redirection device receives parcel delivery classification information data transmitted from the main PLC or the PLC for the primary redirection device, and a built-in program generates a drive signal according to the received classification information data. It is characterized by consisting of a CPU to transmit.

In the present invention, the PLC unit for the first to N-th order direction switching device, the servo drive for driving the AC servo motor for pivoting the feed roller for each horizontal line so that the feed roller is switched in accordance with the drive signal transmitted from the CPU It is characterized in that it is further included.

In the present invention is characterized in that it further comprises a portable angle control device connected to the terminal block of the PLC unit for the first to N-th order direction switching device for inputting the rotation angle of the feed roller pivot.

In the present invention, the parcel delivery classification information data includes a box unique number of the parcel delivered by the main PLC and transmitted to the bar code scanner when the parcel is sensed by the entrance sensor installed in front of the scanner; When the parcel is passed through the scanner and the barcode information of the parcel delivered with the box identification number is transmitted to the SMS (Sorter management system) of the server, the parcel is retrieved from the parcel list of the server by the bar code information. Characterized in that the goods information and destination information of the cargo.

In addition, the present invention is linked to the server via a network, and a plurality of AC servo motor having an AC servo motor for pivoting the transfer roller for sorting the parcels delivered through the conveyor according to the destination and the main roller to rotate the transfer roller In the control method of the redirection device for a transfer conveyor for controlling two redirection devices, when the power is applied, the main PLC drives the conveyor at a constant speed value and transmits the speed value to the PLC for the first to N-th direction redirection device The PLC for the first to Nth direction changers receives the speed value and drives the AC main motor to rotate the feed roller and the conveyor to the same speed value, and rotate the feed roller in the home position (direct direction). Initializing the AC servomotor to be disposed; When the parcel delivered from the conveyor is detected by the entry sensor and an entrance signal is transmitted to the main PLC, the main PLC generates a box ID number (Box ID.) Of the parcel delivered to the scanner and transmits it to the barcode scanner. The barcode scanner transmits the box identification number and the scanned barcode information to the SMS (Sorter management system) of the server when the parcel passes through the barcode scanner, and the SMS uses the scanned barcode information to send the goods information and the destination of the parcel. Secures the classification information including the information, and transmits the courier cargo classification information data generated together with the box unique number to the main PLC, the main PLC transmits the classification information data of the courier cargo to the PLC for the primary redirection device Making preparations; The main PLC tracks the location of the parcel delivery and corrects the position through an entry sensor installed in front of the PLC for the first direction change device. When the parcel enters the designated location, the main PLC classifies the parcel. Transmitting the information data to the PLC for the primary redirection device; The PLC for the primary redirection device analyzes the parcel delivery classification information data received from the main PLC, and the feed roller of the primary redirection device pivots so that the parcel is classified into the primary classifier to the AC servomotor. Sending a control signal or preparing to transmit parcel shipment classification information data to a PLC for a direction change device of a corresponding order; The main PLC tracks the location of the parcel delivery cargo and corrects the position with an entry sensor installed in front of the PLC for each redirection device. When the parcel delivery enters the designated location, the PLC for the primary redirection device is in the corresponding direction of each order. Transmitting parcel delivery classification information data to a PLC for the switching device; The PLC for the corresponding direction change device of each order receives the parcel delivery classification information data, sends a control signal to the AC servo motor, and rotates the AC servo motor so that the feed roller of the direction change device receiving the control signal pivots for each horizontal line. Transferring the parcel to a classifier of a corresponding order; And confirming whether the classified parcels are normally classified by a discharge sensor, and if there is no abnormality, transmitting a classification completion signal to the main PLC to complete classification of the parcels. It provides a control method of the switching device.

In the primary redirection device installed on the conveyor of the present invention, characterized in that it further comprises a pre-transfer step for transferring the parcel delivery to either side of the left and right side of the conveyor to facilitate the classification of the parcel delivery.

In the present invention, the step of initializing the AC servo motor, characterized in that it further comprises the step of connecting the PLC for the first to N-th order direction switching device and the portable angle control device to input the rotation angle to which the feed roller is pivoted. .

The present invention has an advantage that the direction of the transfer conveyor can be efficiently made to lower the error due to malfunction in the classification of the article.

In addition, the present invention has the advantage that it is possible to reduce the cost required for the installation and control of the conveyor because it can reduce the number of parts required for the control device through the PLC control.

In addition, the present invention has the advantage that it is not necessary to provide a separate converter in the SMPS because the motor is driven using an AC power source.

1 is a flow chart for the control method of the redirection device for a conveying conveyor according to the present invention.
Figure 2 is a system diagram for the control device of the conveying conveyor and the turning device according to the present invention.
Figure 3 is an enlarged view of a part of the redirection device installed in the conveying conveyor according to the present invention.
Figure 4 is a perspective view of the feed roller, AC servo motor and AC main motor according to the present invention.
5 is a cross-sectional view of the main PLC unit according to the present invention.
Figure 6 is a cross-sectional view of the PLC unit for the first to N-th order turning apparatus according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings, the turning device of the conveyor.

1 is a flow chart of a control method of a direction change device for a conveying conveyor according to the present invention, Figure 2 is a system diagram for a control device of a conveying conveyor and a direction change device according to the present invention, Figure 3 according to the present invention 4 is an enlarged view of a part of a redirection device installed in a conveying conveyor, FIG. 4 is a perspective view of a conveying roller, an AC servomotor, and an AC main motor according to the present invention, and FIG. 5 is a sectional view of a main PLC unit according to the present invention, and FIG. Is a cross-sectional view of the PLC unit for the first to N-th order direction switching apparatus according to the present invention.

1 is a flow chart of a control method of a direction change device for a conveying conveyor according to the present invention. As shown in the drawings, the transfer device for conveying conveyor according to the present invention is controlled by interlocking with the server through the network, and pivoting the transport roller for sorting the parcels conveyed through the conveyor according to the destination It is a method of controlling a plurality of direction switching apparatus having an AC servo motor and an AC main motor for rotating the feed roller.

Once the power is applied, the main PLC drives the conveyor 11 at a constant speed value and transmits the speed value to the first to Nth direction reversing device PLC, and the first to Nth direction reversing device PLC ( 16 receives the speed value and drives the AC main motor to rotate the feed roller 151 and the conveyor 11 at the same speed value, and to arrange the feed roller 151 in the home position (straight direction). Initialize the AC servomotor 152 (S11). The main PLC 12 transmits the speed value to the PLC for the first to Nth direction switching devices so that when the power is applied, the constant speed value drives the conveyor 11 and the feed roller 151 can be driven at the same speed value. The feed roller 151 can be driven.

Next, when the conveyor is driven normally, the courier cargo P is loaded on the conveyor 11 (S12).

Next, the parcel delivery P is transferred through the conveyor 11 is detected by the entry sensor 13 and the entry signal is transmitted to the main PLC 12 (S13).

When the access signal is transmitted to the main PLC 12, the main PLC 12 generates a box ID (Box ID.) Of the parcel delivery P entering the barcode scanner 14 side and transmits it to the barcode scanner 14. (S14).

The barcode scanner 14 transmits the box identification number and the scanned barcode information to the SMS (Sorter management system) of the server when the parcel passes through the barcode scanner 14 (S15).

The SMS secures the classification information including the item information and the destination information of the parcel by using the scanned barcode information, and transmits the parcel parcel classification information data generated together with the box unique number to the main PLC 12 (S16). .

The main PLC 12 receives and stores classification information data of the parcel delivery from SMS. In addition, the main PLC 12 tracks the position of the parcel delivery P, and calculates the speed value of the conveyor to track the location of the parcel delivery, and the parcel delivery P is located in front of the PLC for the primary redirection device. When detected by the installed entry sensor 17-1, the position value of the parcel delivery is corrected by comparing with the value detected by the entry sensor. When the delivery parcel P enters the designated position through the entry sensor, the main PLC 12 transmits the classification information data of the parcel parcel to the PLC for the primary redirection device (S17).

The primary direction change device PLC 16-1 analyzes the parcel delivery classification information data received from the main PLC 12, and the feed roller 151 of the primary direction change device 15-1 pivots. The control signal is sent to the AC servomotor 152 to classify the parcels to the primary classifier 19-1, or the parcel parcel classification information data is prepared to be sent to the PLC for the direction change device of the corresponding order (S21). .

The AC servomotor 152 is driven by the AC servo drive 166 which receives the control signal of the AC servomotor from the PLC for the primary direction switching device (S22). When the AC servomotor 152 is operated, the parcel delivery P is diverted to the primary classifier 19-1 and classified (S23). When the classification is completed, whether or not the discharge is completed by the discharge sensor 18-1 is transmitted to the main PLC (S24). That is, the discharge sensor 18-1 is classified as the primary classifier 19-1 and transmits whether it is normally discharged or is incorrectly discharged to the main PLC.

Next, the main PLC 12 continuously tracks the position of the parcel delivery cargo, corrects the position with the entry sensor 17-2 installed in front of the PLC 16-2 for the secondary redirection device, and delivers the parcel to the designated location. When the cargo P enters, the primary direction turning device PLC 16-1 transmits parcel delivery cargo classification information data to the secondary direction turning device PLC 16-2 (S21). The PLC 16-2 for the secondary direction change device is to drive the AC servomotor of the secondary direction change device 15-2 when the parcel is to be classified as the secondary classifier 19-2 (S31). The drive signal is transmitted to the AC servo drive 166, and the AC servo drive 166 drives the AC servo motor 152 to change the direction of the feed roller 151 (S32). By the operation of the AC servomotor 152, the parcel deliveries P are diverted by being diverted to the secondary classifier 19-2 (S33). When the classification is completed in the secondary classifier 19-2, the discharge sensor 18-2 transmits to the main PLC whether the classification is completed (S34).

By repeating the above process up to Nth order, the PLC for each order direction switching device sends a drive signal to the AC servo drive, and the AC servo drive drives the AC servomotor (Sn1). Due to the drive of the AC servomotor, the parcel delivery cargo P is classified into the corresponding classifier 19-n (Sn2). When the classification is completed, it is sent to the main PLC (Sn3).

In addition, the pre-transporting step of transferring the parcel delivery to either side of the left and right of the conveyor 11 to facilitate the classification of the parcel delivery (P) in the primary redirection device 15-1.

2 and 3 show the conveying conveyor system 1. As described in the above control method, the transfer conveyor system 1 includes a transfer conveyor 11, a main entrance sensor 13 mounted on the front side of the transfer conveyor 11, and a rear of the main entrance sensor 13. Bar code reader (BCR) 14 located in the main body, the main PLC 12 located on one side of the barcode scanner 14, and a plurality of direction switching devices located behind the barcode scanner 14 ( 15-1). Before and after the plurality of (1st to Nth) direction switching devices 15, the inlet sensor 17 and the discharge sensor 18 are mounted in turn, and on one side of the direction switching device 15, a PLC for each direction switching device ( 16 is mounted, the sorter 19 is mounted on one side or both sides of the direction changer (15).

4 is a perspective view of the turning device 15. The direction changer 15 is composed of a feed roller 151, an AC main motor 153 for driving the feed roller, and an AC servomotor 152 for pivoting the feed roller 151. Specifically, the AC main motors 153 are powered by each other using the belt 154. The rotational force of the AC main motor 153 is transmitted to the rotating body 155 for driving the conveying roller 151 through the belt 154, and finally the rotating force is transferred to the conveying roller 151 through the rotating body 155. Delivered. The AC servomotor 152 is driven through the servo drive 166, the rotational force by the rotation of the AC servomotor 152 is converted into a linear motion of the connecting rod 156, and the linear motion of the connecting rod 156 Accordingly, the connecting rod 157 on the opposite side is converted into a linear motion to change the direction of the feed roller 151.

5 is a view of the main PLC unit 12. The main PLC unit 12 receives a power distribution unit (SMPS) 125 to which AC power, which is an external power source, and the power supplied from the power distribution unit 125 to control the speed of the conveyor and to deliver a parcel (P). The main PLC (121) for tracking the location of the parcel and transmitting the parcel delivery classification data received from the server, the relay switch (124) for the automatic / manual switching of the main PLC, the main breaker (122) and the breaker for the control power supply. 123 and mounting cases 127 to which they are mounted, respectively. In addition, the terminal case 126 is further formed in the mounting case 127, and various cables may be connected thereto.

FIG. 6 shows the PLC unit 16 for the first to Nth direction switching devices. As shown in the figure, the PLC unit 16 for the redirection device primarily supplies power distribution unit (SMPS) 165 to which AC power, which is an external power source, and parcel delivery classification information data of the main PLC 121 are primarily. PLC for the primary redirection device which receives and analyzes the received parcel delivery classification information data to control the primary redirection device or transmits the parcel delivery classification information data to the PLC for each redirection device after the primary. ), A main circuit breaker 162 and a control power circuit breaker 163, a relay switch 164 for automatic / manual switching of a PLC for a primary direction switching device, and a servo drive 166 for driving an AC servomotor. And an inverter 167 for converting to a control power source, and a terminal block 168 to which a cable can be connected, and a mounting case 169 to which each is mounted.

It will be apparent to those skilled in the art that the present invention is not limited to the above embodiments and may be variously modified and modified without departing from the technical spirit of the present invention. will be.

1: transfer conveyor system
11: transfer conveyor 12: main PLC
13: main entrance sensor 14: barcode scanner
15: direction change device 16: PLC for direction change device
17: entry sensor 18: discharge sensor
19: classifier
P: Courier

Claims (8)

A plurality of redirection devices including an AC servo motor which pivots a feed roller for sorting the parcels conveyed by the conveyor according to a destination through a network, and an AC main motor that rotates the feed roller. In the control device of the redirection device for conveying conveyor to control,
The main power distribution unit that receives and distributes AC power, which is an external power source, controls the speed of the conveyor by receiving power from the power distribution unit, tracks the location of the parcel delivery, and receives parcel delivery classification data received from the server. A main PLC unit comprising a main PLC to transmit, and a mounting case to which the power distribution unit, the main PLC, and a relay switch for automatic / manual switching of the main PLC are mounted;
The primary power distribution unit receiving the AC power, which is an external power source, and the parcel delivery classification information data of the main PLC are received first, and the received classification information data is analyzed to control the primary redirection device or the primary Afterwards, the PLC for the primary direction change device for transmitting parcel delivery information data to the PLC for each direction change device, the power distribution unit, the PLC for the primary direction change device, and the PLC for the primary direction change device PLC unit for the primary direction switching device made of a mounting case is mounted / Relay Switch for manual switching; And
N-th order power distribution unit receiving AC power, which is an external power source, N-th order direction switching device PLC for controlling the conveying roller by receiving classification information data of parcel delivery from the PLC for the first direction change device, and the power supply And a PLC unit for an N-thir direction switching device comprising a mounting case mounted with a relay switch for automatic / manual switching of the PLC for the N-th direction switching device and the N-th direction switching device PLC.
The PLC unit for the first to N-th order direction switching device, the power distribution unit, the main and control circuit breaker for blocking the over-current, the terminal block to which various cables are connected, and the direction switching device PLC to control the direction switching device Composed,
The PLC for redirection device receives the parcel delivery classification information data transmitted from the main PLC or the PLC for the primary redirection device, and transmits the parcel information to the CPU to which a built-in program generates and transmits a driving signal according to the received classification information data. Control device of the transfer device for a transfer conveyor, characterized in that the configuration.
delete The method of claim 1,
The PLC unit for the first to N-th order direction switching device, the servo drive for driving the AC servo motor for pivoting the feed roller for each horizontal line so that the feed roller is changed direction according to the drive signal transmitted from the CPU Control device of the transfer device for a transfer conveyor characterized in that it further comprises.
The method of claim 3,
And a portable angle control device connected to the terminal block of the PLC unit for the first to Nth direction turning devices to input a rotation angle at which the feed roller is pivoted.
The method according to any one of claims 1, 3 and 4,
The parcel delivery classification information data,
A box identification number of the parcel delivered by the main PLC and transmitted to the barcode scanner when the parcel is sensed by the entrance sensor installed in front of the scanner;
When the parcel is passed through the scanner and the barcode information of the parcel delivered with the box identification number is transmitted to the SMS (Sorter management system) of the server, the parcel is retrieved from the parcel list of the server by the bar code information. Control device of the transfer device for a transfer conveyor, characterized in that the goods information and destination information of the cargo.
A plurality of redirection devices including an AC servo motor which pivots a feed roller for sorting the parcels conveyed by the conveyor according to a destination through a network, and an AC main motor that rotates the feed roller. In the control method of the turning device for the conveying conveyor to control,
When power is applied, the main PLC drives the conveyor at a constant speed value and transmits the speed value to the first to Nth direction reversing device PLC, and the first to Nth direction reversing device PLC transmits the speed value. Receiving and driving the AC main motor to rotate the feed roller and the conveyor at the same speed value, and initializing the AC servomotor so that the feed roller is disposed in the home position (straight direction);
When the parcel delivered from the conveyor is detected by the entry sensor and an entrance signal is transmitted to the main PLC, the main PLC generates a box ID number (Box ID.) Of the parcel delivered to the scanner and transmits it to the barcode scanner. The barcode scanner transmits the box identification number and the scanned barcode information to the SMS (Sorter management system) of the server when the parcel passes through the barcode scanner. Secures the classification information including the information, and transmits the courier cargo classification information data generated together with the box unique number to the main PLC, the main PLC transmits the classification information data of the courier cargo to the PLC for the primary redirection device Making preparations;
The main PLC tracks the location of the parcel delivery and corrects the position through an entry sensor installed in front of the PLC for the first direction change device. Transmitting the information data to the PLC for the primary redirection device;
The PLC for the primary redirection device analyzes the parcel delivery classification information data received from the main PLC, and the feed roller of the primary redirection device pivots so that the parcel is classified into the primary classifier to the AC servomotor. Sending a control signal or preparing to transmit parcel shipment classification information data to a PLC for a direction change device of a corresponding order;
The main PLC tracks the location of the parcel delivery cargo and corrects the position with an entry sensor installed in front of the PLC for each redirection device. When the parcel delivery enters the designated location, the PLC for the primary redirection device is in the corresponding direction of each order. Transmitting parcel delivery classification information data to a PLC for the switching device;
The PLC for the corresponding direction change device of each order receives the parcel delivery classification information data, sends a control signal to the AC servo motor, and rotates the AC servo motor so that the feed roller of the direction change device receiving the control signal pivots for each horizontal line. Transferring the parcel to a classifier of a corresponding order; And
Checking whether the classified parcels are normally classified by a discharge sensor, and if there is no abnormality, transmitting a classification completion signal to the main PLC to complete the classification of parcels.

In the primary turning device installed on the conveyor,
And a pre-transporting step of transferring the parcel delivery to any one side of the conveyor to facilitate classification of the parcel delivery.
delete The method of claim 6,
In the initializing of the AC servo motor,
And connecting the PLC for the first to Nth direction turning devices and a portable angle control device to input a rotation angle at which the feed roller is pivoted.

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