Conveyor belt type vision labeling machine

Abstract

This utility model discloses a conveyor belt type vision labeling machine, which includes a frame, controller, X-axis moving mechanism, Y-axis moving mechanism, Z-axis moving mechanism, support, labeling conveyor, conveyor belt mechanism, rotary suction device, first vision camera, and second vision camera. This utility model features a reasonable structural design, employing a conveyor belt to transport products, meaning products can be placed at random angles on the conveyor belt mechanism. This eliminates the step of precisely positioning products on fixtures, resulting in faster production cycles and higher efficiency. By using the dual vision of the first and second vision cameras to position the product and label respectively, and dynamically rotating to correct the label angle, it effectively eliminates labeling skew defects caused by label deviation or random product angles, significantly improving labeling quality.

Description

Technical Field

[0001] This utility model relates to the field of labeling technology, specifically to a conveyor belt type visual labeling machine. Background Technology

[0002] In modern industrial production, especially in industries such as electronics, food, pharmaceuticals, and cosmetics, product labeling is a crucial process. Labels not only carry product information and brand identification, but often also contain data such as serial numbers and QR codes required for traceability. Therefore, extremely high demands are placed on the accuracy, efficiency, and consistency of labeling.

[0003] Traditional labeling methods rely primarily on manual operation or semi-automatic equipment, resulting in low efficiency, poor labeling consistency, and high labor intensity, making them unsuitable for large-scale automated production. To address this, automated vision labeling machines have emerged. These machines typically transport products via conveyor belts, using robotic arms or nozzles to pick up labels and affix them to the products, with positioning aided by a vision system. Currently, the typical workflow of vision labeling machines on the market is as follows: first, the product is accurately placed on a moving fixture for transport; upon reaching a predetermined position, a vision camera photographs the product on the fixture to pinpoint the labeling location; then, a robotic arm picks up the label from the label belt and moves it over the product for affixing. However, the label may have rotated or shifted in position while being transported on the conveyor belt or picked up by the nozzle. Existing equipment usually assumes the label is upright when picked up, only providing visual compensation for product position. This means that if the label itself has an angular deviation, even if the product is accurately positioned, the final labeling will be crooked, affecting aesthetics and readability. Furthermore, using mobile fixtures to transport products requires accurately placing the products onto the mobile fixtures, which is time-consuming and results in low work efficiency. Utility Model Content

[0004] To address the aforementioned shortcomings, the purpose of this utility model is to provide a conveyor belt type visual labeling machine with a reasonable structural design, good labeling effect, and high speed.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A conveyor belt type vision labeling machine includes a frame, a controller, an X-axis moving mechanism, a Y-axis moving mechanism, a Z-axis moving mechanism, a support, a labeling conveyor, a conveyor belt mechanism, a rotary suction device, a first vision camera, and a second vision camera. The support and the conveyor belt mechanism are mounted on the worktable of the frame. The Y-axis moving mechanism is mounted on the support, and the reciprocating direction of the Y-axis moving mechanism is perpendicular to the conveying direction of the conveyor belt mechanism. The X-axis moving mechanism is mounted on the Y-axis moving mechanism. The rotary suction device is mounted on the X-axis moving mechanism via the Z-axis moving mechanism. The labeling conveyor is located on one side of the support. The first vision camera is located between the labeling conveyor and the conveyor belt mechanism. The second vision camera is located above the conveyor belt mechanism. The X-axis moving mechanism, Y-axis moving mechanism, Z-axis moving mechanism, labeling conveyor, conveyor belt mechanism, rotary suction device, first vision camera, and second vision camera are all connected to the controller.

[0007] In a preferred embodiment of this utility model, the Z-axis moving mechanism includes a Z-axis frame, a Z-axis motor, a Z-axis slide rail, a Z-axis slider, a Z-axis slide block, a Z-axis drive wheel, a Z-axis driven wheel, and a Z-axis belt. The Z-axis slide rail is mounted on the Z-axis frame. The Z-axis driven wheel is mounted on the Z-axis frame at the lower end of the Z-axis slide rail. The Z-axis motor is mounted on the Z-axis frame at the upper end of the Z-axis slide rail. The Z-axis drive wheel is mounted on the drive shaft of the Z-axis motor and connected to the Z-axis driven wheel via the Z-axis belt. The Z-axis slide block is movably mounted on the Z-axis slide rail via the Z-axis slider. The Z-axis slide block is connected to the Z-axis belt via a connecting plate, thereby realizing the lifting action of the rotary suction device.

[0008] As a preferred embodiment of this utility model, the rotary suction device includes a hollow motor, a connector, a spring, a hollow rod, and a suction nozzle. The connector is mounted on the rotating shaft of the hollow motor. The upper end of the hollow rod is telescopically mounted on the connector, and the lower end is mounted on the suction nozzle. The spring is sleeved on the hollow rod, with its upper end abutting against the connector and its lower end abutting against the suction nozzle, providing buffering in the Z direction and forming flexible contact to avoid damaging the product or label.

[0009] As a preferred embodiment of this utility model, the conveyor belt mechanism includes a feeding frame, a conveyor belt, a conveyor motor, a conveyor drive roller, and a conveyor driven roller. The conveyor drive roller and the conveyor driven roller are disposed at both ends of the feeding frame. The conveyor belt passes around the conveyor drive roller and the conveyor driven roller. The conveyor motor drives the conveyor drive roller to rotate through a pulley assembly, thereby driving the conveyor belt to move continuously or intermittently, thus realizing the conveying of products.

[0010] As a preferred embodiment of this utility model, the labeling conveying device includes a conveyor frame, a feeding wheel assembly, a receiving wheel assembly, guide rollers, a traction wheel assembly, a stepper motor, a peeling plate, a pressure plate, and a support plate. The feeding wheel assembly is located at the tail end of the conveyor frame. The peeling plate and the support plate are arranged sequentially from back to front at the front of the conveyor frame. The pressure plate is located on the peeling plate and forms a material passage groove between the pressure plate and the peeling plate. The traction wheel assembly and the receiving wheel assembly are arranged sequentially from front to back at the lower part of the conveyor frame. The stepper motor drives the traction wheel assembly and the receiving wheel assembly to rotate through a linkage belt assembly. Two guide rollers are positioned at the upper edge of the conveyor frame, corresponding to the positions between the feeding wheel assembly and the peeling plate. One guide roller is positioned on the conveyor frame, corresponding to the position between the receiving wheel assembly and the traction wheel assembly. This device can realize the processes of feeding, traction, peeling, and receiving, ensuring the stability and reliability of label supply.

[0011] In a preferred embodiment of this invention, the feeding wheel assembly includes a support arm, a magnetic powder tensioner, a feeding shaft, and a feeding disc. One end of the support arm is fixedly mounted on the conveyor frame, the feeding shaft is mounted on the other end of the support arm via the magnetic powder tensioner, and the feeding disc is mounted on the feeding shaft. The magnetic powder tensioner provides a constant and adjustable reverse torque to the feeding shaft, ensuring the smoothness of the feeding process.

[0012] As a preferred embodiment of this utility model, the traction wheel assembly includes a side plate, a fixed roller, an adjusting roller, an adjusting handle, and an eccentric wheel. The side plate is provided with a bearing cavity and an adjusting cavity. A bearing is provided in the bearing cavity. The end of the roller shaft of the fixed roller is disposed on the bearing. An elongated sliding hole is provided in the adjusting cavity. The long side of the elongated sliding hole extends along the center line connecting the bearing cavity and the adjusting cavity. The eccentric wheel is located in the adjusting cavity. The roller shaft of the adjusting roller passes through the wheel hole and the radial sliding hole of the eccentric wheel and is provided with the adjusting handle. The operation is simple and convenient.

[0013] In a preferred embodiment of this utility model, the linkage belt assembly includes a driving synchronous pulley, a driven synchronous pulley, a synchronous belt, a driving round pulley, a driven round pulley, and a round belt. The driven synchronous pulley and the driving round pulley are concentrically arranged on the roller shaft of the fixed roller. The driving synchronous pulley is arranged on the drive shaft of the stepper motor and is connected to the driven synchronous pulley via the synchronous belt. The driven round pulley is arranged on the take-up roller assembly and is connected to the driving round pulley via the round belt, thereby achieving synchronization of traction and take-up.

[0014] As a preferred embodiment of this utility model, the peeling plate is provided with limiting guide strips on both sides, and the lower part of the limiting guide strip is provided with a limiting groove to ensure that the material belt moves forward in a straight line.

[0015] The beneficial effects of this utility model are as follows: The utility model has a reasonable structural design and uses a conveyor belt to transport products, meaning products can be placed at random angles on the conveyor belt mechanism. This eliminates the step of precisely positioning products on a fixture, resulting in a faster production cycle and higher efficiency. By using dual vision from a first vision camera and a second vision camera to position the product and label respectively, and dynamically rotating to correct the label angle, it effectively eliminates labeling skew defects caused by label deviation or random product angles, significantly improving labeling quality.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a side view of the structure of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the hidden upper shell in this utility model.

[0020] Figure 4 This is a schematic diagram of the Z-axis moving mechanism in this utility model.

[0021] Figure 5 This is a schematic diagram of the rotating adsorption device in this utility model.

[0022] Figure 6 This is a schematic diagram of the labeling conveying device in this utility model.

[0023] Figure 7 This is a schematic diagram of the conveyor belt mechanism in this utility model. Detailed Implementation

[0024] See the example. Figures 1 to 7 This embodiment provides a conveyor belt type vision labeling machine, which includes a frame 1, a controller 2, an X-axis moving mechanism 3, a Y-axis moving mechanism 4, a Z-axis moving mechanism 5, a bracket 6, a labeling conveying device 7, a conveyor belt mechanism 8, a rotary suction device 9, a first vision camera 10, and a second vision camera 11.

[0025] The support 6 and the conveyor belt mechanism 8 are mounted on the worktable of the frame 1. (See also...) Figure 4The conveyor belt mechanism 8 includes a feed frame 81, a conveyor belt 82, a conveyor motor 83, a drive conveyor roller 84, and a driven conveyor roller 85. The drive conveyor roller 84 and the driven conveyor roller 85 are located at both ends of the feed frame 81. The conveyor belt 82 passes around the drive conveyor roller 84 and the driven conveyor roller 85. The conveyor motor 83 drives the drive conveyor roller 84 to rotate via a pulley assembly. The conveyor motor 83 transmits power to the drive conveyor roller through the pulley assembly 86, thereby driving the conveyor belt 82 to move continuously or intermittently, thus realizing the conveying of products. This eliminates the cumbersome step of fixture positioning, simplifies the process, and improves efficiency.

[0026] The Y-axis moving mechanism 4 is mounted on the bracket 6, and the reciprocating direction of the Y-axis moving mechanism 4 is perpendicular to the conveying direction of the conveyor belt mechanism 8. The X-axis moving mechanism 3 is mounted on the Y-axis moving mechanism 4, and the rotary suction device 9 is mounted on the X-axis moving mechanism 3 via the Z-axis moving mechanism 5.

[0027] See Figure 5 The Z-axis moving mechanism 5 includes a Z-axis frame 51, a Z-axis motor 52, a Z-axis slide rail 53, a Z-axis slider 54, a Z-axis slide block 55, a Z-axis drive wheel 56, a Z-axis driven wheel 57, and a Z-axis belt 58. The Z-axis slide rail 53 is mounted on the Z-axis frame 51. The Z-axis driven wheel 57 is mounted on the Z-axis frame 51 at the lower end position of the Z-axis slide rail 53. The Z-axis motor 52 is mounted on the Z-axis frame 51 at the upper end position of the Z-axis slide rail 53. The Z-axis drive wheel 56 is mounted on the drive shaft of the Z-axis motor 52 and connected to the Z-axis driven wheel 57 via the Z-axis belt 58. The Z-axis slide block 55 is movably mounted on the Z-axis slide rail 53 via the Z-axis slider 54 and is connected to the Z-axis belt 58 via a connecting plate. The Z-axis motor 52 drives the drive wheel, which in turn drives the driven wheel via a synchronous belt. The connecting plate, connected to the synchronous belt, converts the rotary motion into linear motion, driving the X-axis slide to precisely rise and fall along the slide rail, thereby realizing the lifting and lowering action of the rotary suction device 9. (See also...) Figure 6The rotary suction device 9 includes a hollow motor 91, a connector 92, a spring 93, a hollow rod 94, and a suction nozzle 95. The connector 92 is mounted on the shaft of the hollow motor 91. The upper end of the hollow rod 94 is retractably mounted on the connector 92, and the lower end is fitted with the suction nozzle 95. The spring 93 is sleeved on the hollow rod 94, with its upper end abutting against the connector 92 and its lower end abutting against the suction nozzle 95. The hollow motor 91 achieves precise rotation, and the hollow channel between the hollow motor 91 and the hollow rod 94 is used to connect to a vacuum line. The retractable design of the spring 93 and the hollow rod 94 provides buffering in the Z-direction. The hollow motor 91 receives commands from the controller 2 and drives the entire suction nozzle 95 to rotate by a specified angle. When labeling, the suction nozzle 95 contacts the product surface, and the hollow rod 94 can slightly retract upwards to overcome the force of the spring 93, forming a flexible contact and avoiding damage to the product or label.

[0028] The labeling conveying device 7 is located on one side of the bracket 6. (See also...) Figure 7 The labeling conveying device 7 includes a conveyor frame 71, a feeding wheel assembly 72, a receiving wheel assembly 73, a guide roller 74, a traction wheel assembly 75, a peeling plate 76, a pressure plate 77, a support plate 78, and a stepper motor. The feeding wheel assembly 72 is located at the tail end of the conveyor frame 71. The peeling plate 76 and the support plate 78 are arranged sequentially from back to front at the front of the conveyor frame 71. The pressure plate 77 is located on the peeling plate 76 and forms a material passage groove with the peeling plate 76. Preferably, the pressure plate 77 is magnetically attached to the peeling plate 76. Specifically, the bottom surface of the pressure plate 77 has positioning holes at the middle positions of both ends, and receiving cavities are provided on both sides of the positioning holes. Magnets are fixed in the receiving cavities. Positioning posts that match the positioning holes are provided on both sides of the peeling plate 76. The cooperation between the positioning posts and the positioning holes ensures that the pressure plate 77 can be quickly and accurately reset to the correct position each time it is installed, and the pressure can be adjusted by floating up and down. The magnet provides magnetic attraction, which attracts the pressure plate 77 to the peeling plate 76, providing a stable adhesion force.

[0029] The traction wheel assembly 75 and the take-up wheel assembly 73 are arranged sequentially from front to back at the lower part of the conveyor frame 71. The stepper motor drives the traction wheel assembly 75 and the take-up wheel assembly 73 to rotate via a linkage belt assembly. Two guide rollers 74 are positioned at the upper edge of the conveyor frame 71, corresponding to the positions between the feed wheel assembly 72 and the peeling plate 76. One guide roller 74 is positioned on the conveyor frame 71, corresponding to the position between the take-up wheel assembly 73 and the traction wheel assembly 75. The stepper motor drives the traction wheel assembly 75 to pull the label strip forward. When the strip passes the front end of the peeling plate 76, the label is suddenly bent and peeled off by the adhesive strip, causing the label to be suspended and placed flat on the support plate 78 for easy pickup by the suction nozzle 95. The peeled strip is then collected by the take-up wheel assembly 73, thus realizing the processes of feed, traction, peeling, and collection, ensuring the stability and reliability of the label supply. Specifically, the feeding wheel assembly 72 includes a support arm, a magnetic powder tensioner, a feeding shaft, and a feeding disc. One end of the support arm is fixedly mounted on the conveyor frame 71, and the feeding shaft is mounted on the other end of the support arm via the magnetic powder tensioner. The feeding disc is mounted on the feeding shaft. The magnetic powder tensioner provides a constant and adjustable reverse torque to the feeding shaft, ensuring the material belt remains taut and preventing it from slackening due to inertia, thus ensuring the smoothness of the feeding process. The traction wheel assembly 75 includes a side plate, a fixed roller, an adjusting roller, an adjusting handle, and an eccentric wheel. The side plate has a bearing cavity and an adjusting cavity. A bearing is located in the bearing cavity, and the end of the fixed roller shaft is mounted on the bearing. The adjusting cavity has an elongated sliding hole, the long side of which extends along the line connecting the center of the bearing cavity and the adjusting cavity. The eccentric wheel is located in the adjusting cavity, and the roller shaft of the adjusting roller passes through the wheel hole and radial sliding hole of the eccentric wheel, and is equipped with the adjusting handle. Rotating the adjustment handle drives the eccentric wheel to rotate, thereby pushing the adjustment roller closer to or further away from the fixed roller, achieving stepless adjustment of the clamping force. This adapts to material strips of different thicknesses and materials, ensuring no slippage or damage to the strip during traction. Operation is simple and convenient. The linkage belt assembly includes an active synchronous pulley, a driven synchronous pulley, a synchronous belt, an active round pulley, a driven round pulley, and a round belt. The driven synchronous pulley and the active round pulley are concentrically mounted on the roller shaft of the fixed roller. The active synchronous pulley is mounted on the drive shaft of the stepper motor and connected to the driven synchronous pulley via the synchronous belt. The driven round pulley is mounted on the take-up roller assembly 73 and connected to the active round pulley via the round belt. The stepper motor drives the traction roller assembly 75 via the synchronous belt to ensure traction accuracy; simultaneously, power is transmitted to the take-up roller assembly 73 via the coaxial round pulley and round belt. The round belt automatically compensates for the linear velocity difference between the traction roller and the take-up roller caused by changes in roll diameter using elastic sliding, achieving synchronization of traction and take-up. The peeling plate 76 has limiting guide strips on both sides, and limiting grooves are provided at the bottom of the limiting guide strips. The positioning grooves limit and guide the material belt, ensuring that the material belt moves in a straight line and does not deviate.The bottom surface of the limit guide bar is provided with a positioning boss, and the upper surface of the peeling plate 76 is provided with a positioning groove adapted to the positioning boss. The cooperation between the positioning boss and the groove ensures fast and accurate alignment and installation of the limit guide bar. Preferably, a plurality of slots are arranged side by side on the pallet 78, which reduces the adsorption area on the bottom surface of the label, lowers the viscous resistance, and is more conducive to sucking away the label.

[0030] The first vision camera 10 is disposed at a position between the labeling conveying device 7 and the conveyor belt mechanism 8. Specifically, an opening is provided on the workbench of the frame 1, and the first vision camera 10 is disposed at a position below the opening. The first vision camera 10 includes a first CCD camera and an annular light source arranged above the first CCD camera.

[0031] The second vision camera 11 is located at a position above the conveyor belt mechanism 8. Specifically, when the frame 1 is viewed from the side, the whole body is in a "匚" shape, and the second vision camera 11 is located at the top of the frame 1 and faces the conveyor belt mechanism 8. The second vision camera 11 includes a second CCD camera and a square light source arranged below the second CCD camera.

[0032] The controller 2 is disposed on the upper front face of the frame 1. The X-axis moving mechanism 3, the Y-axis moving mechanism 4, the Z-axis moving mechanism 5, the labeling conveying device 7, the conveyor belt mechanism 8, the rotary adsorption device 9, the first vision camera 10 and the second vision camera 11 are all connected to the controller 2 and controlled by it.

[0033] During operation, since products are conveyed by a conveyor belt, the products can be placed on the conveyor belt mechanism 8 at random angles. The step of precisely positioning the product on the jig is omitted, the production cycle is faster, and the efficiency is higher. Through the cooperation of the X-axis moving mechanism 3, the Y-axis moving mechanism 4 and the Z-axis moving mechanism 5, the rotary adsorption device 9 is enabled to adsorb the label conveyed by the labeling conveying device 7 and move it to the position of the first vision camera 10. The first vision camera 10 takes a picture and obtains the position and deflection angle a of the label through analysis. At the same time, the second vision camera 11 takes a picture of the product conveyed by the conveyor belt mechanism 8 and obtains the labeling position and deflection angle b of the product through analysis. Then the controller 2 controls the rotary adsorption device 9 to drive the label to deflect by a corresponding angle, so that the deflection angle a is consistent with the deflection angle b, and the label is adhered to the labeling position of the product, achieving good labeling effect.

[0034] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model. The use of mechanical equipment that is the same as or similar to that used in this utility model is within the protection scope of this utility model.

Claims

1. A conveyor belt type vision labeling machine, comprising a frame, a controller, an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism, characterized in that, It also includes a support, a labeling conveyor, a conveyor belt mechanism, a rotary suction device, a first vision camera, and a second vision camera. The support and conveyor belt mechanism are mounted on the worktable of the frame. The Y-axis moving mechanism is mounted on the support, and the reciprocating direction of the Y-axis moving mechanism is perpendicular to the conveying direction of the conveyor belt mechanism. The X-axis moving mechanism is mounted on the Y-axis moving mechanism. The rotary suction device is mounted on the X-axis moving mechanism via the Z-axis moving mechanism. The labeling conveyor is located on one side of the support. The first vision camera is located between the labeling conveyor and the conveyor belt mechanism. The second vision camera is located above the conveyor belt mechanism. The X-axis moving mechanism, Y-axis moving mechanism, Z-axis moving mechanism, labeling conveyor, conveyor belt mechanism, rotary suction device, first vision camera, and second vision camera are all connected to the controller.

2. The conveyor belt type visual labeling machine according to claim 1, characterized in that: The Z-axis moving mechanism includes a Z-axis frame, a Z-axis motor, a Z-axis slide rail, a Z-axis slider, a Z-axis slide block, a Z-axis drive wheel, a Z-axis driven wheel, and a Z-axis belt. The Z-axis slide rail is mounted on the Z-axis frame. The Z-axis driven wheel is mounted on the Z-axis frame at the lower end of the Z-axis slide rail. The Z-axis motor is mounted on the Z-axis frame at the upper end of the Z-axis slide rail. The Z-axis drive wheel is mounted on the drive shaft of the Z-axis motor and connected to the Z-axis driven wheel via the Z-axis belt. The Z-axis slide block is movably mounted on the Z-axis slide rail via the Z-axis slider and is connected to the Z-axis belt via a connecting plate.

3. The conveyor belt type visual labeling machine according to claim 1, characterized in that: The rotary suction device includes a hollow motor, a connector, a spring, a hollow rod, and a suction nozzle. The connector is mounted on the shaft of the hollow motor. The upper end of the hollow rod is telescopically mounted on the connector, and the lower end is provided with the suction nozzle. The spring is sleeved on the hollow rod, with its upper end abutting against the connector and its lower end abutting against the suction nozzle.

4. The conveyor belt type visual labeling machine according to claim 1, characterized in that: The conveyor belt mechanism includes a feed frame, a conveyor belt, a conveyor motor, a conveyor drive roller, and a conveyor driven roller. The conveyor drive roller and the conveyor driven roller are located at both ends of the feed frame. The conveyor belt passes around the conveyor drive roller and the conveyor driven roller. The conveyor motor drives the conveyor drive roller to rotate through a pulley assembly.

5. The conveyor belt type visual labeling machine according to claim 1, characterized in that: The labeling conveying device includes a conveyor frame, a feeding wheel assembly, a receiving wheel assembly, guide rollers, a traction wheel assembly, a stepper motor, a peeling plate, a pressure plate, and a support plate. The feeding wheel assembly is located at the tail end of the conveyor frame. The peeling plate and the support plate are arranged sequentially from back to front at the front of the conveyor frame. The pressure plate is located on the peeling plate and forms a material passage groove between the pressure plate and the peeling plate. The traction wheel assembly and the receiving wheel assembly are arranged sequentially from front to back at the lower part of the conveyor frame. The stepper motor drives the traction wheel assembly and the receiving wheel assembly to rotate through a linkage belt assembly. Two guide rollers are positioned at the upper edge of the conveyor frame, corresponding to the positions between the feeding wheel assembly and the peeling plate. One guide roller is positioned on the conveyor frame, corresponding to the positions between the receiving wheel assembly and the traction wheel assembly.

6. The conveyor belt type visual labeling machine according to claim 5, characterized in that: The feeding wheel assembly includes a support arm, a magnetic powder tensioner, a feeding shaft, and a feeding disc. One end of the support arm is fixedly mounted on the conveyor frame, the feeding shaft is mounted on the other end of the support arm via the magnetic powder tensioner, and the feeding disc is mounted on the feeding shaft.

7. The conveyor belt type visual labeling machine according to claim 5, characterized in that: The traction wheel assembly includes a side plate, a fixed roller, an adjusting roller, an adjusting handle, and an eccentric wheel. The side plate has a bearing cavity and an adjusting cavity. A bearing is installed in the bearing cavity. The end of the roller shaft of the fixed roller is mounted on the bearing. The adjusting cavity has an elongated sliding hole. The long side of the elongated sliding hole extends along the center line connecting the bearing cavity and the adjusting cavity. The eccentric wheel is located in the adjusting cavity. The roller shaft of the adjusting roller passes through the wheel hole and the radial sliding hole of the eccentric wheel and is provided with the adjusting handle.

8. The conveyor belt type visual labeling machine according to claim 7, characterized in that: The linkage belt assembly includes a driving synchronous pulley, a driven synchronous pulley, a synchronous belt, a driving round pulley, a driven round pulley, and a round belt. The driven synchronous pulley and the driving round pulley are concentrically arranged on the roller shaft of the fixed roller. The driving synchronous pulley is arranged on the drive shaft of the stepper motor and is connected to the driven synchronous pulley through the synchronous belt. The driven round pulley is arranged on the take-up roller assembly and is connected to the driving round pulley through the round belt.

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