Automatic box making machine

Abstract

The utility model belongs to the technical field of color box manufacturing, specifically an automatic box making machine, including a color box conveyor, a mounting plate is installed on the upper left part of the color box conveyor, two groups of through holes are opened on the mounting plate, and reciprocating plates are installed at the through holes, and a driving component for driving the two groups of reciprocating plates to reciprocate is installed on the left part of the mounting plate, a rotating tube is rotatably passed through the two groups of reciprocating plates, and the unloading amount of the placed color box paper pieces can be monitored by the color box feeding monitoring component, so as to avoid the need for personnel to observe all the time, wherein the reciprocating plate will cooperate with the self-rotating component to reciprocate the rotating tube when reciprocatingly rotating, when the reciprocating plate is rotated upward under the action of the driving component, the suction head will also rotate in the direction of the color box paper piece, and the suction head will absorb the color box paper piece, and when the reciprocating plate is rotated downward, the suction head will also drive the color box paper piece to rotate in the direction of the color box conveyor, so as to realize the feeding of the color box paper piece.

Description

Technical Field

[0001] The utility model relates to the technical field of color box manufacturing, in particular to an automatic box making machine. Background Art

[0002] The box making machine is an indispensable equipment for making color boxes in the packaging industry. The color box making machines on the market mainly use PLC programmable controllers, photoelectric tracking systems, hydraulic and pneumatic systems, and touch screen human-machine interfaces. They implement automatic facial tissue feeding, facial tissue gluing, automatic cardboard transportation, cardboard forming four-corner gluing devices, positioning and laminating, and color box forming actions all at once. The whole machine is fully automatic online, and the production efficiency is more than thirty times higher than that of traditional processes. The existing fully automatic panel-type box making machines can basically meet daily use needs, but there are still some shortcomings that need to be improved.

[0003] The Chinese patent (authorization announcement number: CN 217803574 U, authorization announcement date: 2022.11.15) proposes a color box paper sheet feeding device for a box making machine, which includes a frame, a feeding frame, a rotating frame and an adsorption component; the feeding frame is installed on the frame and has a feeding channel for placing the color box paper sheets; the rotating frame is rotatably installed on the frame and is located between the feeding frame and the paper bag conveying device, and can rotate along its own axis; the adsorption component is installed on the rotating frame and is provided with a suction nozzle for adsorbing the color box paper sheets during suction; the adsorption component rotates with the rotating frame to switch the direction of the suction nozzle back and forth between the discharge end of the feeding channel and the conveying device; wherein, after the adsorption component rotates with the rotating frame to align with the paper bag on the paper bag conveying device, the color box paper sheets are placed on the paper bag by holding air. The utility model can automatically and accurately feed and attach the color box paper sheets.

[0004] The above patent does not have a mechanism for monitoring the amount of color box paper when the material is discharged by adsorption through the discharge rack and the adsorption component. Personnel are required to observe the amount of color box paper for a long time to avoid insufficient amount of color box paper and affect the production of subsequent box making machines. In order to facilitate the monitoring of the amount of color box paper, we propose an automatic box making machine. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an automatic box-making machine, which can monitor the feeding amount of the placed color box paper sheets through a color box feeding monitoring component, avoiding the need for personnel to observe all the time, so as to avoid insufficient feeding amount of the color box paper sheets and affecting the production of the subsequent box-making machine, thereby solving the background problem.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] An automatic box making machine includes a color box conveyor, wherein a mounting plate is installed on the upper left portion of the color box conveyor, two groups of through holes are opened on the mounting plate, and reciprocating plates are installed at the through holes, a driving assembly for driving the two groups of reciprocating plates to reciprocate is installed on the left portion of the mounting plate, a rotating tube is rotatably passed through the two groups of reciprocating plates, a plurality of mounting blocks are fixedly connected to the rotating tube, a suction head is fixedly installed on the mounting block, a rotation assembly for driving the rotating tube to rotate is installed on the mounting plate, an inclined plate is fixedly connected to the top of the mounting plate, and a color box feeding monitoring assembly is installed on the inclined plate.

[0008] Preferably, the color box feeding monitoring assembly includes two groups of support plates, a number of color box paper pieces are placed between the two groups of support plates, a number of baffles are fixedly connected to the support plates, a guide plate is fixedly connected to the outside of the support plates, a slide groove is opened on the guide plate, a slider is slidably connected to the slide groove, a connecting rod is fixedly connected to the slider, a counterweight plate is fixedly connected between the two groups of connecting rods, a contact block is fixedly connected to the counterweight plate, a detection plate is fixedly connected between the two groups of support plates, and a pressure sensor is fixedly installed on the detection plate.

[0009] Preferably, a controller and a buzzer are installed on the color box conveyor, and the controller is electrically connected to the signal output end of the pressure sensor and the signal input end of the buzzer through wires.

[0010] Preferably, the driving assembly includes a driving motor, two groups of fixed plates are fixedly connected to the left side of the mounting plate, a driving rod is rotatably installed between the two groups of fixed plates, the driving motor is fixedly installed on the fixing plate, the output end of the driving motor is fixedly connected to the driving rod, two groups of first driving pulleys are fixedly sleeved on the outer surface of the driving rod, two groups of first driven pulleys are rotatably installed on the inner side of the fixing plate, a transmission belt is tensioned and sleeved between the first driving pulley and the first driven pulley, a driving plate is fixedly connected to the rotating shaft of the first driven pulley, a hinged plate is rotatably connected to the driving plate, a transmission plate is fixedly connected to the reciprocating plate, the hinged plate is hinged to the transmission plate, a mounting rod is fixedly connected between the two groups of reciprocating plates, and the mounting rod is rotatably installed on the mounting plate.

[0011] Preferably, the self-rotating assembly includes two sets of first mating wheels, which are fixedly mounted on the mounting plate, and two sets of second mating wheels are fixedly sleeved on the outer surface of the rotating tube, and a tensioning belt is tensionedly sleeved between the second mating wheels and the first mating wheels.

[0012] Preferably, a first rotating joint is fixedly installed on the mounting plate, a first air pipe is fixedly connected to the first rotating joint, a second air pipe is rotatably connected to the first rotating joint, a bracket is fixedly connected to one group of reciprocating rotating plates, a second rotating joint is fixedly installed on the bracket, the second air pipe is fixedly connected to the second rotating joint, the rotating tube is rotatably connected to the second rotating joint, and the suction head is fixedly connected to the inside of the rotating tube through a third air pipe.

[0013] Preferably, the first air pipe is connected to a vacuum pump, the first air pipe is connected to a voltage-stabilizing tube, and a solenoid valve is installed on the voltage-stabilizing tube.

[0014] Preferably, the controller is electrically connected to the signal end of the drive motor, the signal end of the vacuum pump and the signal end of the solenoid valve through wires respectively.

[0015] Preferably, the height of the inclined plate gradually decreases from left to right, and the inclined plate is arranged at an angle.

[0016] Preferably, a lifting handle is fixedly mounted on the back of the counterweight plate, an anti-slip sleeve is fixedly sleeved on the supporting legs of the color box conveyor, and a plurality of friction grooves are arranged on the bottom of the anti-slip sleeve.

[0017] Beneficial Effects

[0018] The utility model provides an automatic box making machine. Compared with the prior art, it has the following beneficial effects:

[0019] 1. This automatic box-making machine presses a number of color box paper pieces by means of a counterweight plate to reduce the gaps between the color box paper pieces, so as to facilitate the subsequent suction head to adsorb and grab. When the amount of color box paper pieces discharged is reduced, the counterweight plate will also slide downward. When the contact block contacts the pressure sensor, it indicates that the amount of color box paper pieces will be insufficient at this time. Then, the amount of placed color box paper pieces can be monitored through the color box feeding monitoring component, so as to avoid the need for personnel to observe all the time, so as to avoid the insufficient amount of color box paper pieces to affect the production of subsequent box-making machines.

[0020] 2. This automatic box-making machine is provided with a driving component for making the reciprocating plate reciprocate. When the reciprocating plate reciprocates, it will cooperate with the self-rotating component to make the rotating tube reciprocate. When the reciprocating plate rotates upward under the action of the driving component, the suction head will also rotate toward the direction of the color box paper sheet, and the suction head will absorb the color box paper sheet. When the reciprocating plate rotates downward, the suction head will also drive the color box paper sheet to rotate toward the direction of the color box conveyor to realize the feeding of the color box paper sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the front view structure of the main body of the utility model;

[0022] Figure 2This is a schematic diagram of the side view structure of the main body of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the color box feeding monitoring component of the utility model;

[0024] Figure 4 This is a schematic diagram of the top view structure of the installation plate of this utility model;

[0025] Figure 5 This is a schematic diagram of the side structure of the mounting plate of the utility model;

[0026] Figure 6 It is a bottom view structural diagram of the mounting plate of the utility model.

[0027] In the figure: 1. color box conveyor; 2. reciprocating plate; 3. mounting plate; 4. detection plate; 5. pressure sensor; 6. support plate; 7. inclined plate; 8. counterweight plate; 9. second rotary joint; 10. third air pipe; 11. drive motor; 12. slider; 13. fixing plate; 14. guide plate; 15. connecting rod; 16. contact block; 17. tensioning belt; 18. baffle; 19. suction head; 20. bracket; 21. mounting rod; 22. driving rod; 23. second matching wheel; 24. rotating tube; 25. first matching wheel; 26. first air pipe; 27. second air pipe; 28. transmission plate; 29. ​​hinged plate; 30. driving plate; 31. first driven pulley; 32. transmission belt; 33. first driving pulley; 34. first rotary joint. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-6 The utility model provides a technical solution: an automatic box making machine, including a color box conveyor 1, a mounting plate 3 is installed on the upper left part of the color box conveyor 1, two groups of through holes are opened on the mounting plate 3, and reciprocating plates 2 are installed at the through holes, and a driving component for driving the two groups of reciprocating plates 2 to reciprocate is installed on the left part of the mounting plate 3, a rotating tube 24 is rotatably passed through the two groups of reciprocating plates 2, a plurality of mounting blocks are fixedly connected to the rotating tube 24, a suction head 19 is fixedly installed on the mounting block, a rotation component for driving the rotating tube 24 to rotate is installed on the mounting plate 3, an inclined plate 7 is fixedly connected to the top of the mounting plate 3, and a color box feeding monitoring component is installed on the inclined plate 7.

[0030] When in use, place the color box paper pieces on the color box feeding monitoring component. The color box feeding monitoring component can monitor the amount of the placed color box paper pieces to avoid the need for personnel to observe all the time, so as to avoid insufficient amount of color box paper pieces and affect the production of subsequent box making machines. The driving component provided therein is used to make the reciprocating plate 2 reciprocate. When the reciprocating plate 2 reciprocates, it will cooperate with the self-rotating component to make the rotating tube 24 reciprocate. When the reciprocating plate 2 rotates upward under the action of the driving component, the suction head 19 will also rotate in the direction of the color box paper pieces, and the suction head 19 will absorb the color box paper pieces. When the reciprocating plate 2 rotates downward, the suction head 19 will also drive the color box paper pieces to rotate in the direction of the color box conveyor 1 to realize the feeding of the color box paper pieces.

[0031] The color box feeding monitoring component includes two groups of support plates 6, a number of color box paper pieces are placed between the two groups of support plates 6, a number of baffles 18 are fixedly connected to the support plates 6, a guide plate 14 is fixedly connected to the outside of the support plates 6, a slide groove is opened on the guide plate 14, a slider 12 is slidably connected to the slide groove, a connecting rod 15 is fixedly connected to the slider 12, a counterweight plate 8 is fixedly connected between the two groups of connecting rods 15, a contact block 16 is fixedly connected to the counterweight plate 8, a detection plate 4 is fixedly connected between the two groups of support plates 6, and a pressure sensor 5 is fixedly installed on the detection plate 4.

[0032] A controller and a buzzer are installed on the color box conveyor 1. The controller is electrically connected to the signal output end of the pressure sensor 5 and the signal input end of the buzzer through wires.

[0033] The counterweight plate 8 is pressed on a number of color box paper pieces to reduce the gaps between the color box paper pieces, making it easier for the suction head 19 to adsorb and grab them later. When the amount of color box paper pieces discharged is reduced, the counterweight plate 8 will also slide downward. When the contact block 16 contacts the pressure sensor 5, it means that the amount of color box paper pieces will be insufficient at this time. The pressure sensor 5 transmits a signal to the controller, and the controller starts a buzzer alarm. When the buzzer alarm sounds, it will remind personnel to add the amount in time.

[0034] The driving assembly includes a driving motor 11, two groups of fixed plates 13 are fixedly connected to the left side of the mounting plate 3, a driving rod 22 is rotatably installed between the two groups of fixed plates 13, the driving motor 11 is fixedly installed on the fixing plate 13, the output end of the driving motor 11 is fixedly connected to the driving rod 22, two groups of first driving pulleys 33 are fixedly sleeved on the outer surface of the driving rod 22, two groups of first driven pulleys 31 are rotatably installed on the inner side of the fixing plate 13, a transmission belt 32 is tensioned and sleeved between the first driving pulley 33 and the first driven pulley 31, a driving plate 30 is fixedly connected to the rotating shaft of the first driven pulley 31, a hinged plate 29 is rotatably connected to the driving plate 30, a transmission plate 28 is fixedly connected to the reciprocating plate 2, the hinged plate 29 is hinged to the transmission plate 28, a mounting rod 21 is fixedly connected between the two groups of reciprocating plates 2, and the mounting rod 21 is rotatably installed on the mounting plate 3.

[0035] The self-rotating assembly includes two sets of first matching wheels 25, which are fixedly mounted on the mounting plate 3. Two sets of second matching wheels 23 are fixedly sleeved on the outer surface of the rotating tube 24, and a tensioning belt 17 is tensionedly sleeved between the second matching wheels 23 and the first matching wheels 25.

[0036] When the driving assembly 11 is started, it will drive the first active pulley 33 to rotate. Since a transmission belt 32 is tensioned between the first active pulley 33 and the first driven pulley 31, it will drive the driving plate 30 to rotate. When the driving plate 30 rotates, it will pull the reciprocating plate 2 to reciprocate through the hinge plate 29. Since the first matching wheel 25 is fixed, when the reciprocating plate 2 rotates, the rotating tube 24 will rotate under the action of the tension belt 17, and then the reciprocating plate 2 can be reciprocated through the driving assembly 11.

[0037] A first rotating joint 34 is fixedly installed on the mounting plate 3, a first air pipe 26 is fixedly connected to the first rotating joint 34, a second air pipe 27 is rotatably connected to the first rotating joint 34, a bracket 20 is fixedly connected to one group of reciprocating rotating plates 2, a second rotating joint 9 is fixedly installed on the bracket 20, the second air pipe 27 is fixedly connected to the second rotating joint 9, the rotating tube 24 is rotatably connected to the second rotating joint 9, and the suction head 19 is fixedly connected to the inside of the rotating tube 24 through the third air pipe 10.

[0038] When the reciprocating plate 2 rotates back and forth, the second air pipe 27 will rotate along the first rotating joint 34, and when the rotating tube 24 rotates, it will rotate along the second rotating joint 9, and then the suction head 19 can be sucked through the first air pipe 26, the first rotating joint 34, the second air pipe 27, the second rotating joint 9, the rotating tube 24, and the third air pipe 10.

[0039] The first air pipe 26 is connected to a vacuum pump, and the first air pipe 26 is connected to a voltage-stabilizing tube, on which a solenoid valve is installed. When the solenoid valve on the voltage-stabilizing tube is turned on, the voltage-stabilizing tube can be opened. At this time, external air will enter the suction head 19 through the voltage-stabilizing tube, thereby relieving the negative pressure state of the suction head 19 and preventing the color box paper from being unloaded onto the color box conveyor.

[0040] The controller is electrically connected to the signal end of the drive motor 11 , the signal end of the vacuum pump and the signal end of the solenoid valve through wires.

[0041] The height of the inclined plate 7 gradually decreases from left to right, and the inclined plate 7 is inclined to facilitate the unloading of the color box paper sheets by their own weight.

[0042] A lifting handle is fixedly installed on the back of the counterweight plate 8, and an anti-skid sleeve is fixedly sleeved on the supporting leg of the color box conveyor 1. The bottom of the anti-skid sleeve is provided with multiple groups of friction grooves to provide stable supporting capacity for the color box conveyor 1.

[0043] Working principle: When in use, the counterweight plate 8 is pressed on a number of color box paper pieces between the two groups of support plates 6 to reduce the gap between the color box paper pieces, so as to facilitate the suction head 19 to adsorb and grab them later. When the amount of color box paper pieces is reduced, the counterweight plate 8 will also slide downward. When the contact block 16 contacts the pressure sensor 5, it means that the amount of color box paper pieces will be insufficient. The pressure sensor 5 transmits a signal to the controller, and the controller starts the buzzer alarm. When the buzzer alarms, it will remind the personnel to add the amount in time. The color box feeding monitoring component can monitor the amount of the placed color box paper pieces, avoiding the need for personnel to observe all the time, so as to avoid insufficient amount of color box paper pieces and affect the production of subsequent box making machines;

[0044] When the driving assembly 11 is started, the first driving pulley 33 will be driven to rotate. Since the first driving pulley 33 and the first driven pulley 31 are tensioned with a transmission belt 32, the driving plate 30 will be driven to rotate. When the driving plate 30 rotates, the reciprocating plate 2 will be pulled to reciprocate through the hinge plate 29. Since the first matching wheel 25 is fixed, when the reciprocating plate 2 rotates, the rotating tube 24 will rotate under the action of the tension belt 17, and then the reciprocating plate 2 can be driven to rotate through the driving assembly 11. The reciprocating plate 2 reciprocates for grabbing, and the driving assembly is used to make the reciprocating plate 2 reciprocate. When the reciprocating plate 2 reciprocates, it will cooperate with the self-rotating assembly to make the rotating tube 24 reciprocate. When the reciprocating plate 2 rotates upward under the action of the driving assembly, the suction head 19 will also rotate in the direction of the color box paper sheet, and the suction head 19 will absorb the color box paper sheet. When the reciprocating plate 2 rotates downward, the suction head 19 will also drive the color box paper sheet to rotate in the direction of the color box conveyor 1, so as to realize the absorption and feeding of the color box paper sheet;

[0045] When the reciprocating plate 2 rotates back and forth, the second air pipe 27 will rotate along the first rotating joint 34, and when the rotating tube 24 rotates, it will rotate along the second rotating joint 9, and then the suction head 19 can be sucked through the first air pipe 26, the first rotating joint 34, the second air pipe 27, the second rotating joint 9, the rotating tube 24, and the third air pipe 10. An electromagnetic valve is installed on the voltage-stabilizing tube. When the electromagnetic valve on the voltage-stabilizing tube is turned on, the voltage-stabilizing tube can be opened. At this time, external air will enter the suction head 19 through the voltage-stabilizing tube, and then the negative pressure state of the suction head 19 can be released, preventing the color box paper from being unloaded onto the color box conveyor.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic box making machine, comprising a color box conveyor (1), characterized in that: A mounting plate (3) is installed on the upper left portion of the color box conveyor (1), and two groups of through openings are opened on the mounting plate (3), and reciprocating plates (2) are installed at the through openings. A driving assembly for driving the two groups of reciprocating plates (2) to reciprocate is installed on the left portion of the mounting plate (3), and a rotating tube (24) is rotatably passed through between the two groups of reciprocating plates (2). A plurality of mounting blocks are fixedly connected to the rotating tube (24), and a suction head (19) is fixedly installed on the mounting block. A self-rotation assembly for driving the rotating tube (24) to rotate is installed on the mounting plate (3), and an inclined plate (7) is fixedly connected to the top of the mounting plate (3), and a color box feeding monitoring assembly is installed on the inclined plate (7).

2. The automatic box making machine according to claim 1, characterized in that: The color box feeding monitoring component comprises two groups of support plates (6), a plurality of color box paper pieces are placed between the two groups of support plates (6), a plurality of baffles (18) are fixedly connected to the support plates (6), a guide plate (14) is fixedly connected to the outside of the support plates (6), a slide groove is provided on the guide plate (14), a slider (12) is slidably connected to the slide groove, a connecting rod (15) is fixedly connected to the slider (12), a counterweight plate (8) is fixedly connected between the two groups of connecting rods (15), a contact block (16) is fixedly connected to the counterweight plate (8), a detection plate (4) is fixedly connected between the two groups of support plates (6), and a pressure sensor (5) is fixedly installed on the detection plate (4).

3. The automatic box making machine according to claim 2, characterized in that: The color box conveyor (1) is equipped with a controller and a buzzer, and the controller is electrically connected to the signal output end of the pressure sensor (5) and the signal input end of the buzzer through wires.

4. The automatic box making machine according to claim 3, characterized in that: The drive assembly comprises a drive motor (11), two groups of fixed plates (13) are fixedly connected to the left side of the mounting plate (3), a drive rod (22) is rotatably mounted between the two groups of fixed plates (13), the drive motor (11) is fixedly mounted on the fixed plate (13), the output end of the drive motor (11) is fixedly connected to the drive rod (22), two groups of first driving pulleys (33) are fixedly sleeved on the outer surface of the drive rod (22), two groups of first driven pulleys (31) are rotatably mounted on the inner side of the fixed plate (13), and the A transmission belt (32) is tensionedly sleeved between the first driving pulley (33) and the first driven pulley (31); a driving plate (30) is fixedly connected to the rotating shaft of the first driven pulley (31); a hinged plate (29) is rotatably connected to the driving plate (30); a transmission plate (28) is fixedly connected to the reciprocating plate (2); the hinged plate (29) is hinged to the transmission plate (28); a mounting rod (21) is fixedly connected between the two sets of reciprocating plates (2); and the mounting rod (21) is rotatably mounted on the mounting plate (3).

5. The automatic box making machine according to claim 4, characterized in that: The self-rotating assembly comprises two sets of first mating wheels (25), wherein the first mating wheels (25) are fixedly mounted on a mounting plate (3), and two sets of second mating wheels (23) are fixedly sleeved on the outer surface of the rotating tube (24), and a tensioning belt (17) is tensionedly sleeved between the second mating wheels (23) and the first mating wheels (25).

6. The automatic box making machine according to claim 5, characterized in that: A first rotating joint (34) is fixedly mounted on the mounting plate (3), a first air pipe (26) is fixedly connected to the first rotating joint (34), a second air pipe (27) is rotatably connected to the first rotating joint (34), a bracket (20) is fixedly connected to one set of reciprocating rotating plates (2), a second rotating joint (9) is fixedly mounted on the bracket (20), the second air pipe (27) is fixedly connected to the second rotating joint (9), the rotating pipe (24) is rotatably connected to the second rotating joint (9), and the suction head (19) is fixedly connected to the inside of the rotating pipe (24) via a third air pipe (10).

7. The automatic box-making machine according to claim 6, characterized in that: The first air pipe (26) is connected to a vacuum pump, the first air pipe (26) is connected to a voltage-stabilizing tube, and a solenoid valve is installed on the voltage-stabilizing tube.

8. The automatic box-making machine according to claim 7, characterized in that: The controller is electrically connected to the signal end of the drive motor (11), the signal end of the vacuum pump, and the signal end of the electromagnetic valve through wires.

9. The automatic box-making machine according to claim 8, characterized in that: The height of the inclined plate (7) gradually decreases from left to right, and the inclined plate (7) is arranged at an angle.

10. The automatic box making machine according to claim 9, characterized in that: A lifting handle is fixedly mounted on the back of the counterweight plate (8), and an anti-slip sleeve is fixedly sleeved on the supporting leg of the color box conveyor (1), and a plurality of friction grooves are arranged on the bottom of the anti-slip sleeve.

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