Conveying system capable of continuously and flexibly turning over boxes in two directions

Abstract

The invention belongs to the technical field of box turnover conveyors, and particularly relates to a continuous flexible bidirectional box turnover conveying system which comprises an inlet end conveyor, an inlet end guide roller, a box turnover device, an outlet end guide roller and an outlet end conveyor. The box turning device comprises a rotating shaft, a rotating roller is connected to the outer side of the rotating shaft in a sleeving mode, four rotating arms which are perpendicular in sequence are arranged on the rotating roller, every two adjacent rotating arms are the long rotating arm and the short rotating arm respectively, a plurality of pulleys are arranged on each rotating arm, and an output shaft of the motor is fixedly connected with the rotating shaft. According to the system, due to the fact that the rotating arms are short, errors can not occur even if the rotating arms are squeezed together before box turning, the cigarette boxes are pressed on the guide rollers, slowly pressed on the rotating arms and then slowly pressed on the conveying rollers at the output end during box turning, box turning can be continuously and flexibly carried out, the cigarette boxes can be placed horizontally instead of being placed vertically, and the production efficiency is improved. And when the turning speed is slightly higher, the smoke box cannot fall on the conveyor heavily, the horizontal placement can be converted into the vertical placement, the structure is simple, and the operation is convenient.

Description

Technical Field

[0001] The present invention belongs to the technical field of turnover conveyors, and particularly relates to a conveying system for continuous flexible two-way turnover of boxes. Background Art

[0002] Currently, the structure control of the known cigarette box turnover device is complex. It requires the lifting and blocking device 01 to be raised and lowered through program control for cooperation, and continuous turnover operation cannot be achieved. Moreover, under the control of the reducer, the "cross" rotation device 02 rotates 90 degrees each time, and all the force of the cigarette box is on the "cross" frame. When the turnover speed is slightly faster, the cigarette box will heavily fall onto the conveyor, as Figure 1 shown. Summary of the Invention

[0003] The purpose of the present invention is to provide a conveying system for continuous flexible two-way turnover of boxes to solve the problems existing in the above background art, make the turnover device simpler and more convenient to use, achieve continuous turnover of cigarette boxes, be suitable for turning a vertically placed cigarette box into a horizontally placed one, and also suitable for turning a horizontally placed cigarette box into a vertically placed one, improve the operation efficiency, and meet the production requirements.

[0004] To achieve the above purpose, the present application is realized through the following technical solutions:

[0005] A conveying system for continuous flexible two-way turnover of boxes includes an inlet conveyor, an inlet guiding roller, a turnover device, an outlet guiding roller, and an outlet conveyor;

[0006] The front end of the inlet guiding roller corresponds to the rear end of the inlet conveyor, the rear end of the inlet guiding roller corresponds to the turnover device, the front end of the outlet guiding roller corresponds to the turnover device, and the rear end of the outlet guiding roller corresponds to the front end of the outlet conveyor;

[0007] The turnover device includes a rotating shaft, a rotating roller is sleeved outside the rotating shaft, four rotating arms perpendicular to each other in sequence are arranged on the rotating roller, and adjacent two rotating arms are respectively a long rotating arm and a short rotating arm, and a plurality of pulleys are arranged on each rotating arm, and the output shaft of the motor is fixedly connected to the rotating shaft;

[0008] The PLC controller is electrically connected to the driving devices of the inlet conveyor and the outlet conveyor and the motor by electrical signals.

[0009] Further, an inlet photoelectric sensor is arranged on one side of the inlet conveyor, a process detection photoelectric sensor is arranged on one side of the inlet guiding roller, a turnover photoelectric sensor is arranged at the corresponding position of the turnover device, and an outlet photoelectric sensor is arranged on one side of the outlet guiding roller. The above-mentioned photoelectric sensors are all electrically connected to the PLC controller by electrical signals.

[0010] Further, a reflector of the photoelectric sensor is arranged on one side corresponding to each photoelectric sensor.

[0011] Further, the distance between the inlet guide roller and the rotating arm is less than half of the width of the cigarette case, and the distance between the outlet guide roller and the rotating arm is less than half of the height of the cigarette case.

[0012] Further, the conveying planes of the inlet conveyor, the inlet guide roller, the outlet guide roller, and the outlet conveyor are all on the same plane and higher than the plane of the rotating arm.

[0013] Further, the length of the short rotating arm is less than the width of the cigarette case, and the length of the long rotating arm is greater than half of the height of the cigarette case and less than the height of the cigarette case.

[0014] Further, the distances between adjacent two pulleys on each rotating arm are not the same. From the rotating roller to the end of the rotating arm, the distances between adjacent two pulleys gradually decrease.

[0015] Further, the control method for the conveying system of any of the above continuous flexible two-way case turning includes the following steps:

[0016] S1. When the inlet photoelectric sensor detects the cigarette case, it transmits the detection signal to the PLC controller; the PLC controls the start of the inlet conveyor;

[0017] S2. When the case turning photoelectric sensor detects the cigarette case, it transmits the detection signal to the PLC controller, and the PLC controller controls the start of the motor to drive the rotating arm to rotate and start case turning;

[0018] S3. When the outlet photoelectric sensor detects the cigarette case, it transmits the detection signal to the PLC controller, and the PLC controller starts the outlet conveyor to output the cigarette case;

[0019] S4. When neither the inlet photoelectric sensor nor the case turning photoelectric sensor detects the cigarette case, the PLC controller controls the inlet conveyor, the motor, and the outlet conveyor to stop and waits to start again when detecting the cigarette case again.

[0020] Further, when continuous cigarette cases enter at the inlet, the PLC controller performs PID control on the case turning speed to achieve continuous flexible case turning and conveying.

[0021] Further, the PLC controller performs PID control on the case turning speed by the following steps:

[0022] S11. The inlet photoelectric sensor detects the speed of the cigarette case entering and real-time feeds back the speed signal to the PLC controller;

[0023] S12. The PLC controller reads the actual speeds of the inlet guide roller detected by the process detection photoelectric sensor and the case turning device detected by the case turning photoelectric sensor, and calculates the speed deviation between the two;

[0024] S13. The PLC controller inputs the calculated speed deviation into the PID function module. The PID function module calculates the control quantity according to the set parameters and sends the control quantity to the frequency converter through the output port of the PLC controller.

[0025] S14. The frequency converter adjusts the rotation speed of the motor of the case turnover device according to the received signal, so that the rotation speed of the case turnover device is adapted to the speed of the cigarette case conveying.

[0026] The beneficial effects of the present invention are as follows:

[0027] This system cancels the jacking and blocking device. Since the rotating arm is short, there will be no errors even if the cigarette cases are crowded together before turnover. For the case turnover device with this structure, when turning over the cigarette case, the cigarette case presses on the guide roller, slowly turns to press on the rotating arm, and then slowly presses on the output end conveying roller, and can continuously and flexibly turn over the cigarette case, so that the cigarette case is converted from standing to lying, and when the turnover speed is slightly faster, the cigarette case will not heavily fall onto the conveyor, and it can also be converted from lying to standing. The structure is simple and the operation is convenient. Description of the Drawings

[0028] Figure 1 FIG. is a working schematic diagram of a cigarette case turnover device in the prior art. Among them, FIG. A is a schematic diagram of the prior art case turnover device, FIG. B is a schematic diagram during the turnover process; FIG. C is a schematic diagram when the turnover speed is appropriate during the turnover process; FIG. D is a schematic diagram when the turnover speed is too fast during the turnover process.

[0029] Figure 2 FIG. is a main schematic diagram of the conveying system for continuous flexible two-way turnover of the present invention.

[0030] Figure 3 The top view of the conveying system for continuous flexible two-way turnover of the present invention.

[0031] Figure 4 FIG. is a working process schematic diagram of converting the cigarette case from a standing case to a lying case of the present invention.

[0032] Figure 5 FIG. is a working process schematic diagram of converting the cigarette case from a lying case to a standing case of the present invention.

[0033] Description of the Reference Numerals:

[0034] 01. Jacking and blocking device; 02. Cross-shaped rotating device; 1. Inlet conveyor; 2. Inlet guide roller; 3. Outlet guide roller; 4. Outlet conveyor; 5. Rotating arm; 6. Rotating roller; 7. Rotating shaft; 8. Pulley; 9. Inlet photoelectric sensor; 10. Process detection photoelectric sensor; 11. Turnover photoelectric sensor; 12. Outlet photoelectric sensor; 13. Motor; 14. Photoelectric sensor reflector. Detailed Embodiments

[0035] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, rather than being construed as a limitation to the technical solution of the present invention.

[0036] As Figure 2 and Figure 3 shown, the present application provides a conveying system for continuous flexible two-way case turning, including an inlet conveyor 1, an inlet guiding roller 2, a case turning device, an outlet guiding roller 3, and an outlet conveyor 4.

[0037] The front end of the inlet guiding roller 2 corresponds to the rear end of the inlet conveyor 1, the rear end of the inlet guiding roller 2 corresponds to the case turning device, the front end of the outlet guiding roller 3 corresponds to the case turning device, and the rear end of the outlet guiding roller 3 corresponds to the front end of the outlet conveyor 4; the conveying planes of the inlet conveyor 1, the inlet guiding roller 2, the outlet guiding roller 3, and the outlet conveyor 4 are all in the same plane.

[0038] The case turning device includes a rotating shaft 7, a rotating roller 6 is sleeved outside the rotating shaft 7, four rotating arms 5 are arranged vertically in sequence on the rotating roller 6, and adjacent two rotating arms are respectively a long rotating arm and a short rotating arm, and a plurality of pulleys 8 are arranged on each rotating arm, and the output shaft of the motor 13 is fixedly connected to the rotating shaft 7.

[0039] To ensure the realization of flexible continuous case turning, the distance between the inlet guiding roller and the rotating arm should be slightly less than half of the width of the cigarette case, the distance between the outlet guiding roller and the rotating arm should be slightly less than half of the height of the cigarette case, and there should be a certain vertical distance between the conveying plane and the rotating arm. To ensure the continuity of case turning, the length of the short side of the rotating arm should be less than the width of the cigarette case, and the length of the long side should be greater than half of the height of the cigarette case and less than the height of the cigarette case. Only in this way can continuous flexible case turning be ensured. When the turning speed is slightly faster, the cigarette case will not fall heavily onto the conveyor when turning over.

[0040] The PLC controller is electrically connected to the driving devices and the motor of the inlet conveyor and the outlet conveyor by electrical signals.

[0041] In the present application, an inlet photoelectric sensor 9 is provided on one side of the inlet conveyor, a process detection photoelectric sensor 10 is provided on one side of the inlet guiding roller, a case turning photoelectric sensor 11 is provided at the corresponding position of the case turning device, and an outlet photoelectric sensor 12 is provided on one side of the outlet guiding roller. The above-mentioned photoelectric sensors are all electrically connected to the PLC controller. A photoelectric sensor reflector 14 is provided on one side corresponding to each photoelectric sensor.

[0042] In this application, the distances between adjacent pulleys on each rotating arm are different. From the rotating roller to the end of the rotating arm, the distances between adjacent pulleys gradually decrease. With such a pulley design, when the rotating arm rotates from the vertical to the horizontal direction, the number of pulleys at the end of the rotating arm increases. At this time, the pressing force between the lower part of the cigarette case and the rotating arm will increase compared to the previous part, making the force for the cigarette case to be thrown out relatively decrease.

[0043] As Figures 4 to 5 shown, this application also provides a control method for a conveying system for continuous flexible two-way case turning, including the following steps:

[0044] S1. When the in-end photoelectric sensor detects a cigarette case, it transmits the detection signal to the PLC controller; the PLC controls the in-end conveyor to start.

[0045] S2. When the case-turning photoelectric sensor detects a cigarette case, it transmits the detection signal to the PLC controller, and the PLC controller controls the motor to start, driving the rotating arm to rotate to start case turning.

[0046] S3. When the out-end photoelectric sensor detects a cigarette case, it transmits the detection signal to the PLC controller, and the PLC controller starts the out-end conveyor to output the cigarette case.

[0047] S4. When neither the in-end photoelectric sensor nor the case-turning photoelectric sensor detects a cigarette case, the PLC controller controls the in-end conveyor, the motor, and the out-end conveyor to stop, and waits to start again when a cigarette case is detected again.

[0048] In this application, when continuous cigarette cases enter at the in-end, the PLC controller performs PID control on the case-turning speed to achieve continuous flexible case-turning and conveying.

[0049] In this application, the PLC controller performs PID control on the case-turning speed using the following steps:

[0050] S11. The in-end photoelectric sensor detects the speed at which the cigarette case enters and real-time feeds back the speed signal to the PLC controller.

[0051] S12. The PLC controller reads the actual speeds of the in-end guide roller detected by the process detection photoelectric sensor and the case-turning device detected by the case-turning photoelectric sensor, and calculates the speed deviation between the two.

[0052] S13. The PLC controller inputs the calculated speed deviation into the PID function module. The PID function module calculates the control quantity according to the set parameters and sends the control quantity to the frequency converter through the output port of the PLC controller.

[0053] S14. The frequency converter adjusts the rotational speed of the motor of the case-turning device according to the received signal, so that the rotational speed of the case-turning device adapts to the speed of cigarette case conveying.

[0054] The specific control principle is as follows:

[0055] When the in - end photoelectric sensor detects the cigarette case, the in - end conveyor is started. When the case - turning photoelectric sensor detects the cigarette case, the case - turning device is started to turn the case. When the out - end photoelectric sensor detects the cigarette case, the out - end conveyor is started to send the cigarette case away. When both the in - end photoelectric sensor and the case - turning photoelectric sensor cannot detect the cigarette case, the in - out conveyor and the case - turning stop and wait to be started again when detected. When continuous cigarette cases enter the in - end, the system will perform PID control through the PLC to continuously and flexibly turn and convey the cases at a continuous turning speed of the case - turning device.

[0056] Since the speeds of the in - out conveyors are designed to match, it is necessary to control the rotational speed of the case - turning to match the conveying speed to achieve continuous and smooth conveying and case - turning. The rotational speed of the case - turning is controlled by a frequency converter. By detecting the material speed (the frequency or frequency of the cigarette case entering), it is set to match the frequency of the conveyor to achieve continuous rotation and conveying of 360 degrees without stopping.

[0057] The PLC is used to achieve automatic adaptation of the rotational speed of the case - turning device to the speed of the conveying roller path (the frequency or frequency of the cigarette case entering) through the PID control method. Specifically, the PLC is connected to the frequency converter through a communication interface, and the communication protocol (Profibus) is set to ensure normal communication between the PLC and the frequency converter.

[0058] An in - end photoelectric sensor is installed to convert the detected cigarette position into the speed of the cigarette entering, and the speed signal is fed back to the PLC in real - time. After the PLC reads the actual speed feedback values of the guiding roller and the case - turning device, it calculates the speed deviation between the two. The speed deviation value is input into the PID function block for operation. The PID function block calculates the control quantity according to the set parameters. This control quantity is sent to the frequency converter through the output port of the PLC, and the frequency converter adjusts the motor speed of the case - turning device according to the received signal, so that the rotational speed of the case - turning device adapts to the speed of the cigarette case conveying (the frequency or frequency of the cigarette case entering).

[0059] Parameter design:

[0060] In a specific embodiment of this application, to ensure continuous conveying, the speed of the out - end roller conveyor is designed at 20 m / min. The height of the cigarette case is 0.58 m and the thickness is 0.26 m. Then the speed of the in - end roller conveyor is designed at about 9 m / min proportionally. The fastest operation can convey 2000 pieces of cigarettes per hour. Exceeding 1200 pieces per hour, it fully meets the production requirements.

[0061] Calculated based on the maximum width of 260 cm and height of 580 cm of a common cigarette case, when the speed of the out - end guiding roller is set at 20 m / min, the speed of the in - end guiding roller needs to be set at 9 m / min.

[0062] The length of the short side of the rotating arm is 240 cm, and the length of the long side of the rotating arm is 300 cm.

[0063] The distance between the inlet guiding roller and the rotating arm is less than half of the cigarette case, which is 120 cm, and the distance between the outlet guiding roller and the rotating arm is greater than half of the height of the cigarette case, which is 300 cm. In this way, the case turning and conveying can be carried out continuously.

[0064] When the inlet photoelectric sensor detects the entry of the cigarette case, the inlet conveyor starts. When the cigarette case blocks the case turning photoelectric sensor, the motor starts, and the rotating arm starts to rotate driven by the motor. Since the distance between the guiding roller and the rotating arm is greater than half of the width of the cigarette case, the cigarette case tilts forward around the guiding roller under the action of gravity, and leans against the rotating arm through the pulley. When the rotating arm rotates 90 degrees, the cigarette case is converted from a standing position to a flat position. At the same time, when the outlet photoelectric sensor is blocked, the outlet conveyor starts to send away the turned cigarette case. Meanwhile, another cigarette case enters, and the case turning starts, and the case turning and sending can be carried out continuously and flexibly. It is suitable for turning a standing cigarette case into a flat one, and is also suitable for turning a flat cigarette case into a standing one.

[0065] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous flexible two-way case turnover conveying system, characterized in that It includes an inlet conveyor, an inlet guiding roller, a case turnover device, an outlet guiding roller, and an outlet conveyor; The front end of the inlet guiding roller corresponds to the rear end of the inlet conveyor, the rear end of the inlet guiding roller corresponds to the case turnover device, the front end of the outlet guiding roller corresponds to the case turnover device, and the rear end of the outlet guiding roller corresponds to the front end of the outlet conveyor; The case turnover device includes a rotating shaft, a rotating roller is sleeved outside the rotating shaft, four rotating arms perpendicular to each other in sequence are arranged on the rotating roller, and adjacent two rotating arms are respectively a long rotating arm and a short rotating arm, and a plurality of pulleys are arranged on each rotating arm, and the output shaft of the motor is fixedly connected to the rotating shaft; The PLC controller is electrically connected to the driving devices of the inlet conveyor and the outlet conveyor and the motor by electrical signals.

2. The conveying system for continuously and flexibly turning boxes bidirectionally according to claim 1, wherein, An inlet photoelectric sensor is arranged on one side of the inlet conveyor, a process detection photoelectric sensor is arranged on one side of the inlet guiding roller, a case turnover photoelectric sensor is arranged corresponding to the case turnover device, and an outlet photoelectric sensor is arranged on one side of the outlet guiding roller. The above-mentioned photoelectric sensors are all electrically connected to the PLC controller by electrical signals.

3. The conveying system for continuously and flexibly turning boxes bidirectionally according to claim 2, wherein A reflector of the photoelectric sensor is arranged on one side corresponding to each photoelectric sensor.

4. The conveying system for continuously and flexibly turning boxes bidirectionally according to claim 1, wherein, The distance between the inlet guiding roller and the rotating arm is less than half of the width of the cigarette case, and the distance between the outlet guiding roller and the rotating arm is less than half of the height of the cigarette case.

5. The conveying system for continuously and flexibly turning boxes bidirectionally according to claim 1, wherein, The conveying planes of the inlet conveyor, the inlet guiding roller, the outlet guiding roller, and the outlet conveyor are all in the same plane and higher than the plane of the rotating arm.

6. The conveying system for continuously and flexibly turning boxes bidirectionally according to claim 1, wherein, The length of the short rotating arm is less than the width of the cigarette case, and the length of the long rotating arm is greater than half of the height of the cigarette case and less than the height of the cigarette case.

7. The conveying system for continuous flexible two-way box turning according to claim 1, characterized in that The distances between adjacent two pulleys on each rotating arm are not the same. From the rotating roller to the end of the rotating arm, the distances between adjacent two pulleys gradually decrease.

8. The control method of the conveying system for continuous flexible two-way box turning according to any one of the above claims 1 to 7, characterized in that, It includes the following steps: S1. When the inlet photoelectric sensor detects the cigarette case, it transmits the detection signal to the PLC controller; the PLC controls the inlet conveyor to start; S2. When the case turnover photoelectric sensor detects the cigarette case, it transmits the detection signal to the PLC controller, and the PLC controller controls the motor to start, driving the rotating arm to rotate to start case turnover; S3. When the outlet photoelectric sensor detects the cigarette case, it transmits the detection signal to the PLC controller, and the PLC controller starts the outlet conveyor to output the cigarette case; S4. When neither the inlet photoelectric sensor nor the case turnover photoelectric sensor detects the cigarette case, the PLC controller controls the inlet conveyor, the motor, and the outlet conveyor to stop and waits to start again when the cigarette case is detected again.

9. The control method of the conveying system for continuous flexible two-way box turning according to claim 8, characterized in that, When continuous cigarette cases enter at the inlet, the PLC controller performs PID control on the case turnover speed to achieve continuous flexible case turnover and conveying.

10. The control method of the conveying system for continuous flexible two-way box turning according to claim 9, characterized in that, The PLC controller performs PID control on the case turnover speed, adopting the following steps: S11. The inlet photoelectric sensor detects the speed at which the cigarette case enters and real-time feeds back the speed signal to the PLC controller; S12. The PLC controller reads the actual speeds of the inlet guiding roller detected by the process detection photoelectric sensor and the case turnover device detected by the case turnover photoelectric sensor, and calculates the speed deviation between the two; S13. The PLC controller inputs the calculated speed deviation into the PID function module. The PID function module calculates the control quantity according to the set parameters and sends the control quantity to the frequency converter through the output port of the PLC controller; S14. The frequency converter adjusts the speed of the motor of the case turnover device according to the received signal, so that the rotation speed of the case turnover device is adapted to the speed of the cigarette case transportation.

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