Automatic zeroing device of box-packed sorting line shunting machine and control method of automatic zeroing device

Abstract

The invention discloses an automatic return-to-zero device for a box sorting line distribution machine and a control method. The automatic return-to-zero device comprises a conveying belt used for conveying boxes on a sorting line at a constant speed, a sorting line incoming line code scanner used for obtaining code scanning information, and a distribution machine front position sensor used for detecting whether distribution boxes exist at corresponding positions or not; according to the flow dividing machine, a driving motor drives a roller module to achieve box conveying, a controller controls a rotating motor to enable the flow dividing machine to be in a flow dividing state or return to the zero position, an angle detector is arranged, and the controller conducts automatic zeroing according to the deflection angle obtained through detection of the angle detector. According to the method, automatic zero returning of the distributing machine is achieved in the normal operation process of the boxed sorting loop line, the problem that the sorting loop line is blocked due to the fact that the error of the distributing machine is too large due to the fact that zero returning operation is not conducted in time is solved, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of automatic box sorting, and more specifically to an automatic zeroing device and control method for a box sorting line shunt machine. Background Art

[0002] Diverters are widely used in the logistics industry. Their main function is to divert the delivered goods to a designated location. The diverter's deflection angle can be set. In the finished product warehousing process of the cigarette logistics industry, the cigarette sorting and warehousing system records information through the main line barcode scanner, transmits the information to the upper computer WCS system, and the system assigns the target crossing. The diverter deflects the main line cigarettes at a fixed angle to transfer them to the sorting crossing.

[0003] During operation, the rotating motor of the diverter is responsible for deflecting the diverter roller module at a fixed angle. After completing the diversion, it needs to return to the origin position. However, since there is an error in the angle of each return to the origin, that is, the zero return error. When the accumulated error reaches a certain value, the deflection angle of the diverter roller module is too large, and the deflection angle of the box is abnormal. The box will hit the corner of the sorting line due to the wrong angle, and even cause a large-scale blockage.

[0004] At present, the method to eliminate the zeroing error is to manually zero the diverter when the equipment is not running, or to automatically zero the diverter after a proper delay when the entire sorting line is stopped without any pieces, so as to calibrate the zeroing position. However, both methods require the zeroing operation to be performed when the sorting line is stopped, which directly affects the efficiency of box sorting. Summary of the invention

[0005] The present invention is to avoid the deficiencies of the above-mentioned prior art and provide an automatic zeroing device and control method for a diverter of a box sorting line, so as to realize automatic zeroing of the diverter during the operation of the box sorting line, improve the reliability of equipment operation, and improve the efficiency of box sorting.

[0006] The present invention adopts the following technical solutions to achieve the purpose of the invention:

[0007] The automatic zeroing device of the box sorting line shunt machine of the present invention comprises:

[0008] The conveyor belt is a transmission mechanism used to transport the boxes on the sorting line at a constant speed;

[0009] The sorting line entry barcode scanner is set at the entrance of the sorting line, obtains the scanned barcode information including the box loading information and the entry time, and transmits the scanned barcode information to the controller;

[0010] The front position sensor of the flow divider is arranged at the front end of the flow divider, and is used to detect whether there is a flow divider box installed at the corresponding position, and record the relevant information of whether the flow divider box is installed in the controller as a "TRUE" or "FALSE" state representation;

[0011] The flow divider includes a roller module, a driving motor and a rotating motor; the driving motor is used to drive the rotation of the roller in the roller module to realize the box-packing conveyance; the controller controls the rotating motor to rotate forward or reverse, so that the flow divider is in a flow dividing state or a zeroing state respectively;

[0012] The angle detector is composed of a cam and a camshaft position sensor. The cam is linked to the motor shaft of the rotating motor. The camshaft position sensor detects the deflection angle of the cam. The controller performs automatic zeroing based on the deflection angle detected by the angle detector.

[0013] The characteristics of the automatic zeroing control method of the box sorting line shunt machine of the present invention are:

[0014] The location of the barcode scanner entering the sorting line is defined as the barcode scanning position;

[0015] The position of the position sensor in front of the diverter is defined as the detection position;

[0016] The shunt state and zero return state of the shunt machine are defined as shunt position and zero position respectively;

[0017] The performance parameters recorded by the controller include:

[0018] The maximum time Tmax required for the diverter to return from the diverting position to the zero position;

[0019] The time required for the incoming line box to move from the code scanning position to the detection position T1;

[0020] The time length T2 that the incoming box moves from the code scanning position to the current position; the current position is between the code scanning position and the detection position, but has not reached the detection position;

[0021] The automatic zeroing control method is performed according to the following steps:

[0022] Step 1: The controller monitors the running state of the sorting loop. When the sorting loop is in the automatic running state, the process goes to step 2; when the sorting loop is in the non-automatic running state, manual zeroing is performed.

[0023] Step 2: The controller monitors whether there are boxes on the sorting loop. If there are no boxes on the sorting loop for 60 seconds, it is determined that there are no boxes on the sorting loop, and the process goes to step 4; otherwise, it is determined that there are boxes on the sorting loop, and the process goes to step 3.

[0024] Step 3: The controller implements control according to the following conditions

[0025] Condition 1: There is no shunt box installed on the shunt machine, and the status representation signal sent by the shunt machine front position sensor to the controller is "FALSE";

[0026] Condition 2: (T1-T2)>Tmax;

[0027] Condition 3: The camshaft position sensor has normal detection function for the cam;

[0028] When conditions 1, 2 and 3 are met at the same time, go to step 4 to implement automatic zeroing control;

[0029] When any of condition 1, condition 2 and condition 3 is not met, return to step 1.

[0030] Step 4: The controller issues a zeroing command to control the roller module to return to the initial position according to the deflection angle detected by the cam sensor, completes automatic zeroing, and returns to step 1.

[0031] The automatic zeroing control method of the box sorting line diverter of the present invention is also characterized in that the controller sends a control signal indicating that the zeroing is completed when the camshaft position sensor detects the falling edge of the cam.

[0032] The automatic zeroing control method of the box sorting line diverter of the present invention is also characterized in that the automatic zeroing control mode is set as follows: when the controller issues a zeroing command, the rotary motor is started to rotate forward so that the camshaft position sensor continues to rotate 60° after detecting the cam; then the rotary motor is controlled to rotate until the camshaft position sensor detects the falling edge of the cam, then stops rotating, and the zeroing is completed.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. The automatic zeroing control method of the present invention is timely, accurate and reliable, which greatly improves the reliability of equipment operation, improves the efficiency of box sorting and saves manpower.

[0035] 2. The present invention is provided with a rotation angle detector composed of a cam and a camshaft position sensor, and utilizes the open-closed characteristic of the cam structure to generate a zeroing trigger signal, so that zeroing is accurate and the formation of zeroing cumulative error is effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the box sorting line of the present invention;

[0037] Figure 2 It is a schematic diagram of a diverter in a box sorting line of the present invention;

[0038] Figure 3 It is a schematic diagram of the structure of the zeroing device in the box sorting line diverter of the present invention;

[0039] Figure 4 It is a schematic diagram of the zeroing and diverting states of the diverter roller module of the present invention;

[0040] Figure 5 It is a schematic diagram of the zero-return diversion state of the cam in the diverter of the present invention.

[0041] Numbers in the figure: 1 sorting line entry scanner, 2 diverter front position sensor, 3 conveyor belt, 4 controller, 5 diverter, 51 roller module, 52 drive motor, 53 rotating motor, 54 cam, 55 camshaft position sensor. DETAILED DESCRIPTION

[0042] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 : In this embodiment, the automatic zeroing device of the box sorting line diverter includes a conveyor belt 3, a sorting line entry code scanner 1, a diverter front position sensor 2 and a diverter 5 and an angle detector.

[0043] like Figure 1 As shown, the conveyor belt 3 is a transmission mechanism, which is used to uniformly transmit the boxes on the sorting line; the sorting line entry line scanner 1 is set at the entrance position of the sorting line, obtains the scanning information including the box information and the entry time, and transmits the scanning information to the controller 4; the diverter front position sensor 2 is set at the front end of the diverter 5, which is used to detect whether there is a diverted box at the corresponding position, and records the relevant information of whether the diverted box exists in the controller 4 as a "TRUE" or "FALSE" state representation; as shown Figure 2 As shown, the diverter 5 includes a roller module 51, a drive motor 52 and a rotary motor 53; the drive motor 52 is used to drive the rotation of the roller in the roller module 51 to realize the box-packing conveyance; the rotary motor 53 is controlled by the controller 4 to rotate forward or reverse, and the forward rotation of the rotary motor 53 makes the diverter 5 present a diverting state ( Figure 4 As shown in Figure (b), the rotating motor 53 rotates to return the flow divider 5 to the zero state ( Figure 4 As shown in Figure (a)); Figure 3 As shown, the angle detector is composed of a cam 54 and a camshaft position sensor 55. The cam 54 is linked to the motor shaft of the rotating motor 53. The camshaft position sensor 55 detects the deflection angle of the cam 54. The controller 4 performs automatic zeroing based on the deflection angle obtained by the angle detector.

[0044] In order to implement the automatic zeroing control of the box sorting line diverter, the position of the sorting line incoming code scanner 1 is defined as the scanning position, the position of the diverter front position sensor 2 is defined as the detection position, the diverting state and zeroing state of the diverter 5 are defined as the diverting position and the zero position respectively, and the performance parameters recorded by the controller 4 include: the maximum time Tmax required for the diverter 5 to return to the zero position from the diverting position, the time T1 required for the incoming box to move from the scanning position to the detection position, and the time T2 taken for the incoming box to move from the scanning position to the current position. The current position is between the scanning position and the detection position, but has not reached the detection position.

[0045] In this embodiment, the automatic zeroing control method of the box sorting line diverter is carried out according to the following steps:

[0046] Step 1: The controller 4 monitors the running state of the sorting loop. When the sorting loop is in the automatic running state, the process goes to step 2; when the sorting loop is in the non-automatic running state, manual zeroing is performed.

[0047] Step 2: The controller 4 monitors whether there are boxes on the sorting loop. If there are no boxes on the sorting loop for 60 seconds, it is determined that there are no boxes on the sorting loop, and the process goes to step 4; otherwise, it is determined that there are boxes on the sorting loop, and the process goes to step 3.

[0048] Step 3: The controller 4 implements control according to the following conditions:

[0049] Condition 1: There is no shunt box installed on the shunt machine 5, and the state characterization signal sent by the shunt machine front position sensor 2 to the controller 4 is "FALSE";

[0050] Condition 2: T1-T2>Tmax;

[0051] Condition 3: The camshaft position sensor 55 has a normal detection function for the cam 54;

[0052] When conditions 1, 2 and 3 are met at the same time, go to step 4 to implement automatic zeroing control;

[0053] When any of condition 1, condition 2 and condition 3 is not met, return to step 1.

[0054] Step 4: The controller 4 issues a reset instruction to control the roller module 51 to rotate back to the initial position according to the deflection angle detected by the cam sensor 55, completes the automatic reset, and returns to step 1.

[0055] In the specific implementation, the corresponding measures also include:

[0056] The controller 4 is when the camshaft position sensor 55 detects the falling edge of the cam 54 (such as Figure 5 a), and sends a control signal that the return to zero is completed.

[0057] The control method for setting automatic zeroing is: when the controller 4 issues a zeroing command, the rotating motor 53 is started to rotate forward so that the cam sensor 55 continues to rotate 60° after detecting the cam 54; then the rotating motor 53 is controlled to rotate back until the cam sensor 55 detects the falling edge of the cam, then stops rotating, and zeroing is completed; "forward" refers to the rotation direction of the driving steering diversion state, and "reverse" refers to the rotation direction of the driving back to zero. Figure 5 The relative position of the cam 54 and the cam sensor 55 shown in a is the relative position when the cam sensor 55 detects the falling edge of the cam 54, that is, the zero position; Figure 5 FIG. b shows the relative positions of the cam 54 and the cam sensor 55 during the diversion operation.

[0058] The calculation method of Tmax in this embodiment is: when the controller 4 sends a zeroing command to the diverter 5, the rotating motor 53 rotates accordingly, driving the cam 54 to first rotate 60° clockwise and then rotate counterclockwise until the cam sensor 55 detects the falling edge of the cam 54 and stops. Depending on the starting position of the cam 54, the time required to complete the above action is different, and the maximum value is recorded as Tmax.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An automatic zeroing device for a box sorting line shunt machine, characterized by: include: The conveyor belt (3) is a transmission mechanism used to uniformly transport the boxes on the sorting line; A sorting line entry barcode scanner (1), which is arranged at the entrance of the sorting line, obtains barcode scanning information including box loading information and entry time, and transmits the barcode scanning information to a controller (4); A flow divider front position sensor (2), which is arranged at the front end of the flow divider (5) and is used to detect whether a flow divider box is installed at a corresponding position, and to record relevant information on whether the flow divider box is installed in a "TRUE" or "FALSE" state representation in the controller (4); The flow divider (5) comprises a roller module (51), a driving motor (52) and a rotating motor (53); the driving motor (52) is used to drive the rotation of the roller in the roller module (51) to realize the conveying of the boxed goods; the controller (4) controls the rotating motor (53) to rotate forward or reverse, so that the flow divider (5) is in a flow dividing state or a zeroing state respectively; The angle detector is composed of a cam (54) and a camshaft position sensor (55). The cam (54) is linked to the motor shaft of the rotating motor (53). The camshaft position sensor (55) detects the deflection angle of the cam (54). The controller (4) performs automatic zeroing according to the deflection angle detected by the angle detector.

2. An automatic zeroing control method for a box sorting line shunt machine according to claim 1, characterized in that: The position of the sorting line inlet barcode scanner (1) is defined as the barcode scanning position; The position of the diverter front position sensor (2) is defined as the detection position; The diverting state and the zeroing state of the diverter (5) are defined as the diverting position and the zero position respectively; The performance parameters recorded by the controller (4) include: The maximum time Tmax required for the diverter (5) to return from the diverting position to the zero position; The time required for the incoming line box to move from the code scanning position to the detection position T1; The time length T2 that the incoming box moves from the code scanning position to the current position; the current position is between the code scanning position and the detection position, but has not reached the detection position; The automatic zeroing control method is performed according to the following steps: Step 1: The controller (4) monitors the running state of the sorting loop line. When the sorting loop line is in an automatic running state, the process proceeds to step 2; when the sorting loop line is in a non-automatic running state, manual zeroing is performed; Step 2: The controller (4) monitors whether there are boxes on the sorting loop. If there are no boxes on the sorting loop for 60 seconds, it is determined that there are no boxes on the sorting loop, and the process goes to step 4; otherwise, it is determined that there are boxes on the sorting loop, and the process goes to step 3; Step 3: The controller (4) implements control according to the following conditions: Condition 1: There is no diverter box installed on the diverter (5), and the status representation signal sent by the diverter front position sensor (2) to the controller (4) is "FALSE"; Condition 2: (T1-T2)>Tmax; Condition 3: The camshaft position sensor (55) has a normal detection function for the cam (54); When conditions 1, 2 and 3 are met at the same time, go to step 4 to implement automatic zeroing control; When any of condition 1, condition 2 and condition 3 is not met, return to step 1; Step 4: The controller (4) issues a reset command to control the roller module (51) to rotate to the initial position according to the deflection angle detected by the cam sensor (55), completes the automatic reset, and returns to step 1.

3. The automatic zeroing control method for the box sorting line shunt machine according to claim 2 is characterized by: The controller (4) sends a control signal indicating that the return to zero is completed when the camshaft position sensor (55) detects the falling edge of the cam (54).

4. The automatic zeroing control method for the box sorting line shunt machine according to claim 3 is characterized by: The automatic zeroing control method is as follows: when the controller (4) issues a zeroing command, the rotary motor (53) is started to rotate forward so that the cam sensor (55) continues to rotate 60 degrees after detecting the cam (54); then the rotary motor (53) is controlled to rotate backward until the cam sensor (55) detects the falling edge of the cam, and then stops rotating, and the zeroing is completed.

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