Labeling mechanism and labeling machine

Abstract

The application discloses a labeling mechanism and a labeling machine and belongs to the technical field of labeling. The labeling mechanism comprises a label feeding assembly, a supporting assembly and an adjusting table are installed on the label feeding assembly, two groups of third air cylinders are installed on the output end of the adjusting table, and two groups of adjusting assemblies are installed on the output end of the third air cylinders. The labeling assembly comprises a supporting pipe rotatably installed on the adjusting assembly, a suction roller is installed on the supporting pipe, and the supporting pipe is in communication with the suction roller. The application adopts a circulating operation structure of double suction rollers alternately taking materials and labeling, while the labeling operation on the inner wall of the product is completed by one side of the suction roller, the other side of the suction roller can synchronously complete the label taking process, the station switching is seamlessly connected with the label taking and labeling operation, the equipment does not need to stop and wait for feeding, the continuous operation capacity and the overall labeling efficiency of the equipment are greatly improved, and the labeling operation demand of the flow line normalization batch is adapted.

Description

Technical Field

[0001] This invention relates to the field of labeling technology, and more specifically, to a labeling mechanism and a labeling machine. Background Technology

[0002] With the rapid development of industrial automation and intelligent manufacturing technologies, automated packaging equipment has become a core component of modern production lines. Among them, labeling machines, as key equipment for product identification, brand display, and information traceability, are widely used in various fields such as food, beverage, pharmaceuticals, daily chemicals, and electronics. The main function of a labeling machine is to accurately peel off and affix rolls of labels to designated positions on the products or containers to be packaged. Its labeling accuracy, operating efficiency, and operational stability directly affect the overall packaging quality and market competitiveness of the product.

[0003] Currently, there are many types of labeling machines on the market. Based on the labeling location, they can be mainly divided into flat labeling machines, side labeling machines, circumferential labeling machines, and inner wall labeling machines for special containers. For common cylindrical products, labeling operations are usually divided into outer wall labeling and inner wall labeling. Outer wall labeling technology is relatively mature, while inner wall labeling of cylindrical products, due to its limited working space, obstructed view, and diverse inner wall materials, places more stringent requirements on the structural design and control precision of the equipment.

[0004] Existing labeling equipment mostly adopts a single-station or single-adsorption structure, and its workflow is often intermittent: after the adsorption roller completes label picking, it needs to stop or slow down to perform the labeling action, and then reset before the next picking. This operating mode results in significant idle waiting time during station switching, making it impossible to synchronize the picking and labeling processes, which seriously affects the continuous operation capability of the equipment.

[0005] Secondly, existing labeling equipment uses independent drive sources to control the label feeding mechanism and the adsorption roller, which lacks forced synchronous transmission constraints. During operation, mismatches in conveying speed and rotation phase may occur, causing the peeled label to wrinkle, shift, or even tear on the adsorption roller surface. This results in poor label adsorption and forming quality, and difficulty in ensuring labeling position accuracy. Therefore, this paper proposes a labeling mechanism and labeling machine. Summary of the Invention

[0006] The purpose of this invention is to provide a labeling mechanism and a labeling machine to address at least one of the aforementioned technical problems.

[0007] This invention provides a labeling mechanism, including a label feeding component, a support component and an adjustment platform mounted on the label feeding component, two sets of third cylinders mounted on the output end of the adjustment platform, and two sets of adjustment components mounted on the output end of the third cylinders. The labeling assembly includes a support tube rotatably mounted on an adjustment assembly, an adsorption roller mounted on the support tube, and the support tube and the adsorption roller being internally connected. The adjustment table switches between two sets of adsorption rollers and coordinates with the adjustment components to make the transmission mechanism of the drive source connected to the label feeding component engage with the adsorption roller on the material feeding side, and to keep the adsorption roller on the labeling side in contact with the inner wall of the product.

[0008] As a further description of the above technical solution, the support assembly includes a support frame, which is slidably connected to the label feeding assembly. A first cylinder is installed on the label feeding assembly, and the output end of the first cylinder is connected to the support frame. A roller is rotatably installed on the support frame, and the label tape passes through the surface of the support frame and is wound around the roller. The end of the support frame has a tapered structure.

[0009] As a further description of the above technical solution, a telescopic shaft is rotatably mounted on the support frame, and the free end of the telescopic shaft is rotatably mounted on the label feeding assembly. Both ends of the telescopic shaft are equipped with second bevel teeth. A first bushing is rotatably mounted on the support frame, and a third bevel tooth is mounted on the first bushing. The third bevel tooth and the first bevel tooth mounted on the drive roller of the label feeding assembly mesh with the corresponding second bevel teeth for transmission.

[0010] As a further description of the above technical solution, the adjusting table includes an electric slide table installed on the label feeding assembly. An adjusting plate is installed at the output end of the electric slide table. The adjusting plate is slidably connected to the label feeding assembly. A lifting frame is slidably installed on the adjusting plate. A second cylinder is installed on the lifting frame. The output end of the second cylinder is connected to the adjusting plate. A motor is installed on the lifting frame. The output end of the motor is connected to the adjusting frame. The adjusting frame is rotatably connected to the lifting frame.

[0011] As a further description of the above technical solution, the adjustment assembly includes a connecting frame and a top plate. The output end of the third cylinder is connected to the top plate, the connecting frame is slidably connected to the output end of the adjustment table, the top plate is slidably connected to the connecting frame, and a first elastic element connected to the top plate is installed on the connecting frame.

[0012] As a further description of the above technical solution, a second bushing is rotatably mounted on the connecting frame, a flower shaft is slidably mounted inside the second bushing, a second elastic element connected to the flower shaft is installed inside the second bushing, and a fourth bevel tooth is installed on the second bushing. The fifth bevel tooth installed on the support tube meshes with the fourth bevel tooth for transmission.

[0013] As a further description of the above technical solution, an electromagnetic brake is installed on the connecting frame, and the electromagnetic brake is sleeved on the outside of the support tube; a tension and compression sensor is assembled between the output end of the third cylinder and the top plate.

[0014] As a further description of the above technical solution, a displacement sensor is installed on the support frame, and the displacement sensor is located directly below the first bushing.

[0015] As a further description of the above technical solution, the adsorption roller is provided with a plurality of adsorption holes, and an air slip ring is installed at the end of the support tube, and the support tube is connected to the negative pressure device through the air slip ring.

[0016] This invention also discloses a labeling machine, including the labeling mechanism described above, and further including two sets of rotatably arranged support rollers and two sets of positioning rollers. The support rollers are connected to the output end of the drive device, and the positioning rollers are rotatably mounted on the lifting device.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. This invention adopts a cyclic operation structure of alternating material picking and labeling with dual adsorption rollers. While one adsorption roller completes the labeling operation on the inner wall of the product, the other adsorption roller can simultaneously complete the label picking process. The workstation switching and material picking and labeling operations are seamlessly connected, and there is no need to stop the equipment to wait for material to be loaded. This greatly improves the continuous operation capability of the equipment and the overall labeling efficiency, and is suitable for the needs of routine batch labeling operations on the production line.

[0018] 2. This invention, through a plug-in transmission mechanism, ensures that the label tape conveying speed, rotation phase, and adsorption roller operation remain consistent, completely eliminating label folding, tearing, and offset problems caused by speed and phase deviations in traditional equipment, and significantly improving the flatness of label picking and the accuracy and stability of labeling operations.

[0019] 3. By setting up an electric slide, lifting frame, and multiple sets of cylinders, this invention can achieve flexible adjustment of the height, horizontal position, and spacing of the adsorption roller. At the same time, it sets up an automatic alignment structure between the flower shaft and the first bushing, which can autonomously complete the precise insertion and adaptation of the transmission structure, greatly reducing the difficulty of equipment alignment and assembly.

[0020] 4. The adjustment component of this invention precisely drives the top plate displacement through the third cylinder, which in turn drives the connecting frame and labeling component to make overall fine adjustments, so that the adsorption roller is stably pressed against the inner wall of the cylindrical product; the tension and pressure sensor monitors the contact pressure in real time, which can accurately control the labeling pressure, so that the adsorption roller and the inner wall of the product maintain a constant adhesion pressure. This ensures that the label is fully adhered to the inner wall of the product without gaps or air pockets, improving the adhesion of the label. It can also adapt to the corresponding pressure according to the cylindrical products with different materials and wall thicknesses, avoiding the problems of label falling off due to insufficient pressure and product deformation due to excessive pressure, thus greatly improving the labeling yield. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the labeling mechanism disclosed in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the transmission mechanism structure of the labeling mechanism disclosed in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the labeling mechanism adjustment table structure disclosed in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the labeling mechanism and label tape winding according to a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of the installation position of the third cylinder of the labeling mechanism disclosed in a preferred embodiment of the present invention; Figure 6 This is a schematic diagram of the flower shaft connection structure of the labeling mechanism disclosed in a preferred embodiment of the present invention; Figure 7 This is a partial cross-sectional view of a labeling mechanism disclosed in a preferred embodiment of the present invention; Figure 8 The labeling mechanism disclosed in a preferred embodiment of the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram illustrating the labeling principle of the product of this invention; Figure 10 This is a schematic diagram of the material pick-up position of the adsorption roller in this invention.

[0022] The following are the labeling symbols in the diagram: 1. Label feeding assembly; 11. First conical tooth; 2. Support assembly; 21. Support frame; 22. First cylinder; 23. Roller body; 24. Fixed frame; 25. Telescopic shaft; 26. Second conical tooth; 27. First bushing; 28. Third conical tooth; 3. Adjusting table; 31. Electric slide table; 32. Adjusting plate; 33. Lifting frame; 34. Second cylinder; 35. Motor; 36. Adjusting frame; 4. Third cylinder; 5. Adjusting assembly; 51. Connecting frame; 52. Top plate; 53. Guide rod; 54. First elastic element; 55. Second bushing; 56. Flower shaft; 57. Second elastic element; 58. Fourth conical tooth; 59. Electromagnetic brake; 6. Labeling assembly; 61. Support tube; 62. Adsorption roller; 63. Convection hole; 64. Adsorption hole; 65. Fifth conical tooth; 7. Support roller; 8. Positioning roller. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Reference Figures 1 to 10This application discloses a labeling mechanism and labeling machine, including a label feeding component 1. The label feeding component 1 can continuously feed the label tape on the unwinding reel to the rewinding reel. A first bevel tooth 11 is fixedly installed on the drive roller of the label feeding component 1. The drive roller is connected to the drive source. When the drive roller rotates, it can drive the first bevel tooth 11 to rotate synchronously. A support component 2 is installed on the label feeding component 1.

[0025] Reference Figures 1 to 4 The support component 2 includes a support frame 21, which is slidably connected to the mounting frame of the label feeding component 1. A first cylinder 22 is fixedly installed on the mounting frame of the label feeding component 1. The output end of the first cylinder 22 is fixedly connected to the support frame 21. A roller 23 is rotatably installed on the support frame 21. The label tape passes over the surface of the support frame 21 and is wound around the roller 23. The end of the support frame 21 has a tapered structure. After passing over the thinner end from the upper surface of the support frame 21, the label tape is folded back from its bottom and conveyed to the roller 23. The label and the backing paper are peeled off at the end of the support frame 21, thereby reducing the difficulty of picking up the label.

[0026] A fixed frame 24 is fixedly mounted on the support frame 21. A telescopic shaft 25 is rotatably mounted on the fixed frame 24. The free end of the telescopic shaft 25 is rotatably mounted on the mounting bracket of the label feeding assembly 1. Second bevel teeth 26 are fixedly mounted on both ends of the telescopic shaft 25. A first bushing 27 is rotatably mounted on the fixed frame 24. A third bevel tooth 28 is fixedly mounted on the first bushing 27. The third bevel tooth 28 and the first bevel tooth 11 mesh with the corresponding second bevel tooth 26 on the telescopic shaft 25. The first bevel tooth 11 meshes with the second bevel tooth 26 at one end of the telescopic shaft 25, driving the telescopic shaft 25 to rotate synchronously. Then, through the meshing of the second bevel tooth 26 and the third bevel tooth 28 at the other end of the telescopic shaft 25, the first bushing 27 is finally driven to rotate synchronously with the drive roller of the label feeding assembly 1.

[0027] Reference Figure 1 and Figure 3 An adjusting platform 3 is installed on the label feeding assembly 1. The adjusting platform 3 includes an electric slide 31 fixedly installed on the label feeding assembly 1. An adjusting plate 32 is fixedly installed at the output end of the electric slide 31. The adjusting plate 32 is slidably connected to the mounting frame of the label feeding assembly 1. A lifting frame 33 is slidably installed on the adjusting plate 32. A second cylinder 34 is installed on the lifting frame 33. The output end of the second cylinder 34 passes through the lifting frame 33 and is fixedly connected to the adjusting plate 32. A motor 35 is fixedly installed on the lifting frame 33. An adjusting frame 36 is fixedly connected to the output end of the motor 35. The adjusting frame 36 is rotatably connected to the lifting frame 33. When the output end of the second cylinder 34 extends, it can drive the lifting frame 33 and the adjusting frame 36 on it to rise, thereby realizing the adjustment of the lifting position in the subsequent label adsorption process.

[0028] Reference Figures 5 to 9Two sets of third cylinders 4 are fixedly installed on the adjusting frame 36. Two sets of adjusting components 5 are also installed on the adjusting frame 36. The adjusting components 5 include a connecting frame 51 and a top plate 52. The output end of the third cylinder 4 is fixedly connected to the top plate 52. The connecting frame 51 is slidably connected to the adjusting frame 36 through a guide rod 53. The top plate 52 is slidably connected to the guide rod 53. A first elastic element 54 is fitted on the guide rod 53. One end of the first elastic element 54 is fixedly connected to the connecting frame 51, and the other end is fixedly connected to the top plate 52. When the top plate 52 is located in the middle of the guide rod 53, the first elastic element 54 is in a free state, that is, at this time... The first elastic element 54 is not stretched or compressed. A second bushing 55 is rotatably mounted on the connecting frame 51. A flower shaft 56 is slidably mounted inside the second bushing 55. The flower shaft 56 slides along the axial direction of the second bushing 55. A second elastic element 57 is installed inside the second bushing 55. One end of the second elastic element 57 is fixedly connected to the second bushing 55, and the other end is fixedly connected to the flower shaft 56. The second elastic element 57 is used to drive the flower shaft 56 to move to the outside of the second bushing 55 until the flower shaft 56 reaches the limit position. The flower shaft 56 never disengages from the second bushing 55. A fourth bevel tooth 58 is fixedly mounted on the second bushing 55. When the second bushing 55 rotates to be coaxial with the first bushing 27 directly above it, the connecting frame 51 drives the second bushing 55 to move downward, enabling the flower shaft 56 and the first bushing 27 to engage. After the flower shaft 56 and the first bushing 27 engage, the first bushing 27 can drive the flower shaft 56 to rotate, thereby achieving synchronous transmission between the second bushing 55 and the drive roller of the label feeding assembly 1. An electromagnetic brake 59 is installed on the connecting frame 51. In addition, a tension / compression sensor is installed between the output end of the third cylinder 4 and the top plate 52 to monitor the tension / compression values.

[0029] Reference Figure 1 , Figures 5 to 9A labeling assembly 6 is installed on the connecting frame 51. The labeling assembly 6 includes a support tube 61 rotatably mounted on the connecting frame 51. When the connecting frame 51 is horizontal, the axes of the two support tubes 61 are at the same height as the rotation axis of the adjusting frame 36. An adsorption roller 62 is fixedly installed on the support tube 61. A convection hole 63 is opened inside the support tube 61. The support tube 61 is connected to the inside of the adsorption roller 62 through the convection hole 63. A number of adsorption holes 64 are opened on the adsorption roller 62. The number of adsorption holes 64 are circumferentially arrayed on the adsorption roller 62. An air slip ring is installed at the end of the support tube 61. The support tube 61 is connected to the negative pressure equipment through the air slip ring, so as to prevent the air guide tube from rotating and winding with the support tube 61. An electromagnetic brake 59 is fitted on the outside of the support tube 61 to brake and fix the support tube 61, so as to prevent the support tube 61 with the label adsorbed from rotating during the position switching process, reducing the difficulty of subsequent labeling on the inner wall of the cylindrical product. A fifth bevel tooth 65 is fixedly installed on the support tube 61. The fifth bevel tooth 65 meshes with the fourth bevel tooth 58 to drive the support tube 61 and the adsorption roller 62 to rotate, thereby realizing synchronous transmission between the adsorption roller 62 and the drive roller of the label feeding assembly 1. When the drive roller conveys the label tape, the adsorption roller 62 can follow the drive roller to rotate synchronously, which can completely solve the problem of label adsorption folding and tearing caused by the inconsistency of the rotation speed and rotation phase between the two, and improve the accuracy and stability of adsorption.

[0030] The labeling machine also includes two sets of support rollers 7 and two sets of positioning rollers 8. The positioning rollers 8 are installed on the lifting equipment and can be raised and lowered by the lifting equipment. One support roller 7 is connected to the drive source. The product is placed between the two support rollers 7, and the top of the product is limited by the positioning rollers 8, thereby ensuring that the product can rotate stably with the support rollers 7. After the adsorption roller 62 is inserted into the product, the output end of the third cylinder 4 drives the labeling component 6 to move through the adjustment component 5. The first elastic element 54 is gradually stretched. The adsorption roller 62 of the labeling component 6 contacts the inner wall of the product, and the tension and pressure sensor reaches the set threshold. The electromagnetic brake 59 is energized to unlock, releasing the brake lock on the support tube 61. The support roller 7 drives the product to rotate, and the adsorption roller 62 rotates accordingly, thus adhering the label to the inner wall of the cylindrical product.

[0031] It should be noted that after the adsorption roller 62 adsorbs the label, it is necessary to determine the position of the label on the adsorption roller 62 to ensure that the area where the adsorption roller 62 with the label completes the position switch and initially contacts the inner wall of the product is an empty area without the label. Subsequently, as the product and the adsorption roller 62 rotate synchronously, the label gradually adheres to the inner wall of the product, which can effectively avoid the label being torn due to force in the early stage of labeling.

[0032] In use, the second cylinder 34 drives the lifting frame 33 to rise, causing the adjusting frame 36 and its labeling assembly 6 to move upwards, raising the two sets of adsorption rollers 62 above the label tape conveying end face of the support frame 21. The first cylinder 22 drives the support frame 21 to move towards the adsorption roller 62 side. The output end of the third cylinder 4, which is close to the label tape side, extends, driving the top plate 52 to move towards the label tape. By compressing the first elastic element 54, the connecting frame 51 is pushed to its maximum limit. At this time, the lateral expansion displacement of the adsorption roller 62 of the labeling assembly 6 reaches its maximum, and the corresponding tension and pressure sensor detection value reaches the set pressure threshold, preventing the connecting frame 51 from driving the labeling assembly 6 to move in the opposite direction. This reduces the difficulty of inserting and aligning the flower shaft 56 and the first bushing 27, improving the alignment accuracy. At this time, the positions of the adsorption roller 62 and the support frame 21 are referenced. Figure 4 The first bushing 27 and the flower shaft 56 are coaxial.

[0033] The second cylinder 34 drives the adjusting component 5 and the labeling component 6 to descend via the lifting frame 33, so that the floral shaft 56 is initially inserted into the first bushing 27. At this time, the lowest point of the adsorption roller 62 is still higher than the label tape. It should be noted that a displacement sensor can be installed on the fixing frame 24. The displacement sensor is located directly below the first bushing 27. The displacement sensor is used to detect the height of the floral shaft 56, thereby determining whether the floral shaft 56 is inserted into the first bushing 27. When the floral shaft 56 has not completed effective insertion with the first bushing 27 after its initial descent, the drive source of the label feeding component 1 drives the drive roller to rotate slightly. The drive roller synchronously drives the first bevel tooth 11 to rotate. Through the meshing transmission between the first bevel tooth 11 and the second bevel tooth 26 at the end of the telescopic shaft 25, the telescopic shaft 25 and another set of second bevel teeth 26 are driven to rotate. This drives the third bevel tooth 28 that meshes with the second bevel tooth 26 and the first bushing 27 to rotate slightly, completing the precise alignment of the port of the first bushing 27 with the floral shaft 56 and achieving stable insertion between the two.

[0034] A first circumferential encoder and a second circumferential encoder are added to collect the real-time phase of the first bushing 27 and the second bushing 55, respectively. The controller compares the angle signals output by the two sets of encoders in real time and calculates the compensation angle required for the spline groove alignment of the two. The controller outputs a pulse signal to control the label feeding drive roller to perform a small rotation of the corresponding angle until the phase difference between the two sets of encoders falls into the preset insertion allowable tolerance range, and it is determined that the spline groove of the first bushing 27 and the spline shaft 56 are completely aligned. At the same time, the controller stores the phase reference value after each insertion is completed as the initial compensation parameter for the next round of alignment, eliminating the phase deviation caused by the random locking angle of the support tube 61 after each labeling.

[0035] After the initial insertion of the spool 56 and the first bushing 27, the label feeding assembly 1 begins to convey the label tape. The drive roller drives the label tape on the unwinding reel to be conveyed at a constant speed towards the rewinding reel. The label tape is wrapped around the roller 23 and adheres to the upper surface of the support frame 21. Because the end of the support frame 21 has a tapered structure, the label tape bends gently when it passes the end, allowing the label to peel off one-third of the backing paper smoothly at the end of the support frame 21, achieving initial label separation and reducing the difficulty of subsequent label picking and negative pressure adsorption operations. Subsequently, the second cylinder 34 drives the labeling assembly 6 to descend slightly again, pushing the spool 56 further into the first bushing 27 to complete the insertion and locking. At this time, the lowest point of the adsorption roller 62 is level with the label tape conveying height, and the peeled end of the label just passes the lowest point of the adsorption roller 62, accurately entering the adsorption operation area.

[0036] When the external negative pressure device is activated, the negative pressure airflow is introduced into the adsorption roller 62 through the air slip ring at the end of the support tube 61 and the convection hole 63. Finally, a stable negative pressure adsorption force is formed through the adsorption holes 64 distributed in a circumferential array on the adsorption roller 62. At the same time, the label feeding component 1 continuously feeds the label tape. The rotational torque of the drive roller is transmitted step by step through the first bevel tooth 11, through the second bevel tooth 26, the telescopic shaft 25, and the third bevel tooth 28 to the first bushing 27, and then through the insert-fitting flower shaft 56 to the second bushing 55. Finally, through the meshing transmission of the fourth bevel tooth 58 and the fifth bevel tooth 65, the support tube 61 and the adsorption roller 62 are driven to rotate synchronously, realizing the complete synchronous movement of the adsorption roller 62, the drive roller of the label feeding component 1, and the label tape. The structural design of the air slip ring can effectively avoid the problem of air tube entanglement during the rotation of the support tube 61. The synchronous transmission structure completely solves the problems of label folding, tearing, and offset caused by inconsistent speeds in traditional equipment, allowing the peeled label to be flat and accurately adsorbed and fixed on the surface of the adsorption roller 62, completing the label picking process. It should be noted that the equipment controller has pre-stored the tooth backlash compensation parameters of the multi-stage bevel gear transmission chain. Before each label feeding drive roller starts synchronous transmission, the controller first outputs the compensation angle to offset the accumulated backlash of each stage of gears, and then executes normal conveying operation. In conjunction with the dual circumferential encoder, the phase offset generated during operation is corrected in real time through closed loop, eliminating the starting impact of the adsorption roller 62 caused by the gap of the multi-stage bevel gears and preventing the label from wrinkling instantly.

[0037] Reference Figure 10 Point B is the lowest point of the adsorption roller 62 during label adsorption. After the label is picked up, it is necessary to ensure that there is no label at point D. After the two sets of adsorption rollers 62 switch positions, point D of the adsorption roller 62 with the label corresponds to point d of the adsorption roller 62 on the labeling side. Point d is the core contact point between the adsorption roller 62 and the inner wall of the product. If point d corresponds to the middle position of the label, during the labeling operation, the product drives the adsorption roller 62 to rotate, and the label on the opposite side of the inner wall of the product will tear due to the force of pulling, ultimately leading to labeling failure.

[0038] Therefore, when the adsorption roller 62 finishes picking up the material and point D is covered by the label, the adsorption roller 62 on the labeling side finishes labeling and moves towards the center of the product. The second cylinder 34 drives the adjustment component 5 and the labeling component 6 to rise slightly through the lifting frame 33, so that the adsorption roller 62 on the picking side drives the label to rise. Its bottom is higher than the label tape height on the support frame 21, and the flower shaft 56 is not separated from the first bushing 27. After the material is picked up, the label photoelectric detection sensor collects the image signal of the D-point area in real time. If the sensor detects that the D-point is covered by a label, the controller controls the independent synchronous pulley circuit of the dual-output servo motor 35 to drive the support tube 61 to rotate in the opposite direction. The servo motor 35 controls the reverse angle in a closed loop according to the label boundary position signal fed back by the sensor, until the label photoelectric detection sensor detects that the D-point area is not covered by a label and stops reversing. This reversing action only drives the adsorption roller 62 to rotate alone, which is completely isolated from the drive roller of the label feeding component 1 and the label tape conveyor chain. The unwinding reel, the rewinding reel, and the entire label tape maintain the original forward conveying tension unchanged, and there is no risk of label tape backing, tension disorder, or label breakage. After the D-point is cleared, the electromagnetic brake 59 locks the support tube 61 on the picking side to fix the current label-free phase.

[0039] When the adsorption roller 62 on the labeling side moves to the center position of the product, the second cylinder 34 drives the adjustment component 5 and the labeling component 6 to continue to rise through the lifting frame 33, so that the flower shaft 56 disengages from the first bushing 27. At the same time, the first cylinder 22 drives the support frame 21 to move backward to make room for the labeling component 6 to rotate.

[0040] The electric slide 31 drives the adjustment plate 32, lifting frame 33, adjustment component 5 and labeling component 6 to move. The adsorption roller 62 inserted into the product is pulled out from the product opening. The output end of the third cylinder 4 drives the top plate 52 to move towards the motor 35, which in turn drives the connecting frame 51 and the corresponding labeling component 6 to move towards the motor 35, reducing the distance between the two sets of labeling components 6 and preventing the labeling component 6 from colliding with the parts of the labeling machine after switching positions. The output end of the motor 35 drives the adjustment frame 36 to rotate, which in turn drives the labeling component 6 on the adjustment component 5 to switch positions. During the switching process, the positioning roller 8 rises, and the product with the label on the inner wall is unloaded by the feeding mechanism or the robot and replaced with the next product with the label. The positioning roller 8 moves down to limit the product again.

[0041] After the labeling component 6 is switched, the third cylinder 4 drives the labeling component 6 to move outward and reset until the displacement of the two sets of labeling components 6 reaches the maximum. The electric slide 31 drives the adjusting plate 32, the lifting frame 33, the adjusting component 5 and the labeling component 6 to move, so that the adsorption roller 62 is inserted into the product. The output end of the third cylinder 4 on the labeling side drives the top plate 52 to move towards the motor 35, which in turn drives the connecting frame 51 and the corresponding labeling component 6 to move towards the motor 35. When the detection value of the tension and pressure sensor reaches the set threshold, the adsorption roller 62 is pressed against the inner wall of the product. The electromagnetic brake 59 releases the fixation of the support tube 61. The support roller 7 drives the product to rotate. The adsorption roller 62 rotates synchronously with the product. When the adhesive surface of the label contacts the inner wall of the product, it can adhere to the inner wall of the product, realizing labeling on the inner wall of the cylindrical product.

[0042] It should be noted that before the adsorption roller 62 contacts the inner wall of the product, the flower shaft 56 corresponding to the adsorption roller 62 on the other side has been inserted into the first bushing 27. During the process of the label being adhered to the inner wall of the product, the adsorption roller 62 on the other side simultaneously picks up the label, completing the continuous cycle operation.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A labeling mechanism, characterized in that: It includes a label feeding component (1), a support component (2) and an adjustment platform (3) are installed on the label feeding component (1), two sets of third cylinders (4) are installed at the output end of the adjustment platform (3), and two sets of adjustment components (5) are installed at the output end of the third cylinders (4). The labeling assembly (6) includes a support tube (61) rotatably mounted on the adjustment assembly (5), an adsorption roller (62) is mounted on the support tube (61), and the support tube (61) is internally connected to the adsorption roller (62); The adjustment table (3) switches the two sets of adsorption rollers (62) and coordinates with the adjustment component (5) to make the transmission mechanism of the drive source of the label feeding component (1) engage with the adsorption roller (62) on the material feeding side, and make the adsorption roller (62) on the labeling side adhere to the inner wall of the product.

2. The labeling mechanism according to claim 1, characterized in that: The support assembly (2) includes a support frame (21), which is slidably connected to the label feeding assembly (1). A first cylinder (22) is installed on the label feeding assembly (1). The output end of the first cylinder (22) is connected to the support frame (21). A roller (23) is rotatably installed on the support frame (21). The label tape passes through the surface of the support frame (21) and is wound around the roller (23). The end of the support frame (21) has a tapered structure.

3. The labeling mechanism according to claim 2, characterized in that: A telescopic shaft (25) is rotatably mounted on the support frame (21). The free end of the telescopic shaft (25) is rotatably mounted on the label feeding assembly (1). Both ends of the telescopic shaft (25) are equipped with second bevel teeth (26). A first bushing (27) is rotatably mounted on the support frame (21). A third bevel tooth (28) is mounted on the first bushing (27). The third bevel tooth (28) and the first bevel tooth (11) mounted on the drive roller of the label feeding assembly (1) mesh with the corresponding second bevel tooth (26) for transmission.

4. The labeling mechanism according to claim 1, characterized in that: The adjustment table (3) includes an electric slide table (31) installed on the label feeding assembly (1). An adjustment plate (32) is installed at the output end of the electric slide table (31). The adjustment plate (32) is slidably connected to the label feeding assembly (1). A lifting frame (33) is slidably installed on the adjustment plate (32). A second cylinder (34) is installed on the lifting frame (33). The output end of the second cylinder (34) is connected to the adjustment plate (32). A motor (35) is installed on the lifting frame (33). The output end of the motor (35) is connected to the adjustment frame (36). The adjustment frame (36) is rotatably connected to the lifting frame (33).

5. The labeling mechanism according to claim 3, characterized in that: The adjustment assembly (5) includes a connecting frame (51) and a top plate (52). The output end of the third cylinder (4) is connected to the top plate (52). The connecting frame (51) is slidably connected to the output end of the adjustment table (3). The top plate (52) is slidably connected to the connecting frame (51). A first elastic element (54) connected to the top plate (52) is installed on the connecting frame (51).

6. The labeling mechanism according to claim 5, characterized in that: A second bushing (55) is rotatably mounted on the connecting frame (51), a flower shaft (56) is slidably mounted inside the second bushing (55), a second elastic element (57) connected to the flower shaft (56) is installed inside the second bushing (55), and a fourth bevel tooth (58) is mounted on the second bushing (55). The fifth bevel tooth (65) installed on the support tube (61) meshes with the fourth bevel tooth (58) for transmission.

7. The labeling mechanism according to claim 5, characterized in that: An electromagnetic brake (59) is installed on the connecting frame (51), and the electromagnetic brake (59) is sleeved on the outside of the support tube (61); a tension and pressure sensor is installed between the output end of the third cylinder (4) and the top plate (52).

8. The labeling mechanism according to claim 3, characterized in that: A displacement sensor is installed on the support frame (21), and the displacement sensor is located directly below the first bushing (27).

9. The labeling mechanism according to claim 1, characterized in that: The adsorption roller (62) has several adsorption holes (64), and the end of the support tube (61) is equipped with a slip ring. The support tube (61) is connected to the negative pressure device through the slip ring.

10. A labeling machine, comprising the labeling mechanism according to any one of claims 1-9, characterized in that: It also includes two sets of rotating support rollers (7) and two sets of positioning rollers (8). The support rollers (7) are connected to the output end of the drive equipment, and the positioning rollers (8) are rotatably installed on the lifting equipment.

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