Automatic carton sealing and labeling device

Abstract

The application discloses a kind of automatic carton sealing and labeling device, belong to carton sealing and labeling device field.The application is positioned by being made into positioning by multiple cyclic motion sealing assembly being set on conveying belt, using the speed difference of automatic sealing table and conveying belt to make carton in continuous motion naturally close to abutting block, realize sealing assembly and carton synchronous completion sealing and labeling, solve the restriction of traditional intermittent stop mode to production line efficiency;By setting the stop plate to thin hard smooth material, a rigid support surface is formed below the hinge, ensuring the flatness of the top surface of the carton and the gapless bonding of the adhesive tape;By pressing the rod and the rack groove, the electric push rod continues to press down, and the speed increasing transmission of the bevel gear set is automatically converted into a pull rope release to drive the stop plate to retract, and the reset is triggered by the release block on the return path, realizing the timing of the mechanical linkage and automatic cycle reset when retracting, without the need for sensors to meet the continuous operation requirements of high-speed production line.

Description

Technical Field

[0001] This invention relates to the field of carton sealing and labeling devices, specifically an automatic carton sealing and labeling device. Background Technology

[0002] Carton sealing and labeling devices are key equipment in the final stage of the packaging production line. They are primarily used to automatically close the top hinges of filled cartons, seal them with tape, and automatically attach logistics or product labels, thus ensuring the cartons meet the sealing and labeling requirements for warehousing and transportation. These devices are typically located on the conveyor line between the packing and palletizing stations, working in conjunction with upstream automatic packing machines and downstream palletizing robots to form a complete downstream process in the packaging production line. With the rapid development of e-commerce and the fast-moving consumer goods (FMCG) industry, packaging production lines have placed higher demands on the processing speed and automation level of the sealing and labeling process. Sealing and labeling devices have gradually evolved from early semi-automatic stand-alone operations to fully automatic online equipment integrated with the production line's conveyor system.

[0003] Existing carton sealing and labeling equipment generally employs a positioning, stopping, operation, and release workflow. Specifically, after a carton is conveyed to the designated sealing station via a conveyor line, a photoelectric sensor detects the carton's arrival signal. The conveyor line then stops, or a cylinder-driven blocking mechanism stops the carton at a preset position, bringing it to a complete stop. The sealing mechanism then operates, first folding the four hinges at the top of the carton sequentially or simultaneously, then applying sealing tape along the center seam of the top surface of the carton and folding it to the sides. After sealing, the labeling mechanism starts, affixing pre-printed shipping labels or product labels to the designated surface of the carton. Once all operations are complete, the blocking mechanism retracts or the conveyor line restarts, releasing the carton to the next station. Throughout this entire cycle, cartons already packed upstream can only queue on the conveyor line, unable to enter the sealing station, creating a logistical bottleneck between processes.

[0004] However, the aforementioned carton sealing and labeling equipment still has the following drawbacks: both sealing and labeling operations require the carton to be completely stationary. The dwell time of each carton at the sealing station typically includes three parts: braking and deceleration time, mechanism movement time, and re-acceleration time. Among these, braking and deceleration are non-productive time consumption, which can accumulate to 0.5 to 1.5 seconds per carton in high-speed production lines. Based on a processing rate of 30 cartons per minute, non-productive time can account for 25% to 75%, severely restricting the overall flow efficiency of the production line. Simultaneously, the conveyor line undergoes a speed cycle from running speed to zero and back to running speed with each carton passing through. The conveyor belt, its drive motor, and reducer are subjected to frequent forward and reverse impact loads, accelerating fatigue wear of transmission components, shortening equipment lifespan, and increasing maintenance and replacement frequency. Especially in high-load production lines with a daily processing capacity exceeding 10,000 cartons, transmission system failures caused by start-stop impacts have become one of the main causes of unplanned downtime. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic carton sealing and labeling device to solve the problem of non-productive time consumption during braking, deceleration, and re-acceleration in the prior art.

[0006] The technical problem to be solved by the present invention can be achieved through the following technical solution: an automatic carton sealing and labeling device, comprising: an automatic sealing table, wherein a pre-processing component and a rotating component are installed on the top of the automatic sealing table; the pre-processing component includes a pre-processing frame, which is installed on the top of the automatic sealing table, and a driving block is installed on the top of the pre-processing frame, and a toggle lever is installed at the output end of the driving block; the rotating component includes a support frame, which is installed on the top of the automatic sealing table, and a conveyor belt and a release block are installed on the support frame, wherein multiple evenly distributed sealing components are installed on the conveyor belt, and a tape sealing machine, a blocking component and a labeling mechanism are provided inside the sealing components, wherein the labeling mechanism includes a labeling machine installed on a moving plate, and the labeling head of the labeling machine is positioned facing the top surface of the carton.

[0007] Preferably, the sealing assembly includes a sealing frame, one end of which is connected to the conveyor belt, and an abutment block is installed at the bottom of the sealing frame.

[0008] Preferably, an electric push rod is installed on the inner wall of the sealing frame, a movable plate is installed at the output end of the electric push rod, a damping telescopic rod is installed at the bottom end of the movable plate, and a pressing rod is fixedly connected to one end of the movable plate. A connecting plate is installed at the bottom end of the damping telescopic rod, and the bottom end of the connecting plate is connected to the tape sealing machine.

[0009] Preferably, the blocking assembly includes a damper installed at one end of the sealing frame, and a blocking plate is installed at the output end of the damper. The blocking plate is slidably connected to a groove formed in the abutment block.

[0010] Preferably, the blocking assembly further includes a support base installed at one end of the sealing frame, a damping shaft installed at the top of the support base, a pull rope wound around the outer periphery of the damping shaft, and the pull rope being connected to the blocking plate.

[0011] Preferably, a first bevel gear is mounted on the top of the damping shaft, a second bevel gear is meshed with one end of the first bevel gear, a synchronizing gear is mounted on one end of the second bevel gear, and the synchronizing gear is rotatably connected to the support base.

[0012] Preferably, a rack is slidably connected to the outer surface of the sealing frame, and the rack is meshed with a synchronous gear.

[0013] Preferably, the rack has a groove, and the inner wall of the groove abuts against the pressing rod.

[0014] Preferably, a limiting groove is formed on the outer surface of the rack, a spring is installed in the limiting groove, and a limiting block is installed at one end of the spring.

[0015] Preferably, a positioning block is installed on the support base, the positioning block has a locking groove that matches the limiting block, and an elastic release rod that matches the release block is installed at one end of the positioning block.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention, by setting multiple cyclically moving sealing components on a conveyor belt and setting the conveyor speed of the automatic sealing station to be lower than that of the conveyor belt, allows the cartons to naturally move towards the abutment block for positioning during continuous movement, utilizing the speed difference. The sealing components and cartons form a synchronous relationship, and the tape sealing machine and labeling machine complete the sealing and labeling operations during synchronous movement. This solution transforms the traditional intermittent mode of stopping, operating, and restarting into a continuous mode where the equipment follows the cartons, solving the problem of non-productive time accumulation and impact wear of transmission components caused by frequent start-stop cycles, significantly improving production line efficiency and reducing equipment maintenance costs.

[0017] 2. This invention solves the problem of hinges denting or springing back due to lack of support when the pressure rollers of a tape sealing machine apply pressure by setting the baffle plate to a thin, rigid, and smooth material. After the carton is positioned, it is completely located under the two longer hinges to form a rigid support surface. The thin wall ensures smooth entry and exit from narrow gaps, the rigid material ensures that it does not deform under pressure, and the smoothness ensures that the attached tape does not peel off when pulled out. The three factors work together to keep the top surface of the carton flat during the sealing process, and the tape and the carton surface form a tight, gapless fit, which significantly improves the sealing quality.

[0018] 3. This invention automatically converts the downward pressing action of the electric push rod into rack displacement through the abutment engagement between the pressing rod and the rack groove. The two-stage speed-increasing transmission of the synchronous gear and bevel gear set causes the damping shaft to release the pull rope, and the damper thrust drives the stop plate to automatically pull out. This achieves a purely mechanical linkage between the timing of the pull-out and the timing of the completion of the top adhesive tape application, without the need for sensor or controller intervention. For resetting, the limit block and locking groove self-lock to maintain the final working state, and then the release block on the return path of the conveyor belt triggers the elastic release rod to complete the unlocking. The gear set reverses the transmission to make the whole automatically return to the initial state, realizing a fully mechanical, unattended cyclic reset, which meets the continuous operation requirements of high-speed production lines. Attached Figure Description

[0019] Figure 1 A three-dimensional structural diagram of the automatic carton sealing and labeling device provided by the present invention; Figure 2 This is a three-dimensional structural diagram of the side of the device provided by the present invention; Figure 3 This is a three-dimensional structural diagram of the rotating component provided by the present invention; Figure 4 This is a three-dimensional structural diagram of the sealing assembly provided by the present invention; Figure 5 This is a schematic diagram of the internal structure of the sealing frame provided by the present invention; Figure 6 This is a schematic diagram of the baffle structure provided by the present invention; Figure 7 This is a schematic diagram of the side structure of the sealing frame provided by the present invention; Figure 8 A schematic diagram of the side structure of the blocking component provided by the present invention; Figure 9 This is a schematic diagram of the rack structure provided by the present invention; Figure 10 This is a schematic diagram of the pretreatment component processing provided by the present invention; Figure 11 This is a schematic diagram of the abutment process of the baffle provided by the present invention; Figure 12 This is a schematic diagram of the processing structure of the tape sealing machine provided by the present invention; Figure 13 This is a preliminary process structure diagram of the tape sealing machine provided by the present invention; Figure 14 This is a schematic diagram of the edge processing structure of the tape sealing machine provided by the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Automatic sealing table; 2. Pre-treatment assembly; 3. Rotating assembly; 4. Sealing assembly; 5. Blocking assembly; 21. Pre-treatment frame; 22. Drive block; 23. Actuating rod; 31. Support frame; 32. Conveyor belt; 41. Sealing frame; 42. Blocking block; 43. Electric push rod; 44. Moving plate; 45. Damping telescopic rod; 46. Connecting plate; 47. Tape sealing machine; 48. Pressing rod; 51. Damper; 52. Blocking plate; 53. Support base; 54. Damping shaft; 55. First bevel gear; 56. Second bevel gear; 57. Synchronizing gear; 58. Rack; 59. Positioning block; 60. Elastic release rod. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1 Existing carton sealing and labeling equipment typically requires the carton to be transported to a designated workstation and then brought to a complete stop before the sealing and labeling mechanisms can complete their respective operations. Only after these operations are completed can the carton be transported to the next process.

[0023] This intermittent work pattern of stopping, operating, and restarting significantly restricts the overall flow efficiency of the production line. Especially in high-speed packaging production lines, frequent starts and stops not only reduce capacity but also cause impact wear on the transmission mechanism and increase equipment maintenance costs.

[0024] like Figures 1 to 5 In this embodiment, a pre-processing component 2 and a rotating component 3 are installed at the top of the automatic sealing table 1. The rotating component 3 includes a support frame 31, on which a conveyor belt 32 and a release block are installed. Multiple evenly distributed sealing components 4 are installed on the conveyor belt 32. Each sealing component 4 includes a sealing frame 41, one end of which is connected to the conveyor belt 32. An abutment block 42 is installed at the bottom of the sealing frame 41. An electric push rod 43 is installed on the inner wall of the sealing frame 41. A moving plate 44 is installed at the output end of the electric push rod 43. A damping telescopic rod 45 is installed at the bottom of the moving plate 44. A pressing rod 48 is fixedly connected to one end of the moving plate 44. A connecting plate 46 is installed at the bottom of the damping telescopic rod 45. The bottom of the connecting plate 46 is connected to a tape sealing machine 47. A labeling machine is also installed on the moving plate 44, with the labeling head facing the top surface of the carton.

[0025] A stop assembly 5 is installed at one end of the sealing frame 41. The stop assembly 5 includes a damper 51 and a stop plate 52. The output end of the damper 51 is connected to the stop plate 52, and the stop plate 52 is slidably connected to a groove on the abutment block 42. A support base 53 is also installed at one end of the sealing frame 41. A damping shaft 54 ​​is installed at the top of the support base 53. A pull rope is wound around the outer circumference of the damping shaft 54, and the other end of the pull rope is connected to the stop plate 52. The transmission speed of the automatic sealing table 1 is set to be lower than the transmission speed of the conveyor belt 32.

[0026] The working principle of the automatic carton sealing and labeling device: In the initial state, the damper 51 applies a continuous pushing force to the baffle 52 in the pulling direction, that is, away from the carton. This pushing force tends to pull the baffle 52 out of the carton working area. However, the pull rope wound on the damping shaft 54 ​​is in a tightened state. The tension of the pull rope is balanced with the pushing force of the damper 51, which restrains the baffle 52 in the extended position, that is, the front end of the baffle 52 is kept in a preset position outside the sealing frame 41.

[0027] The packaging box is first placed on the automatic sealing table 1, and then transported by the automatic sealing table 1 into the working area of ​​the pre-processing component 2. The pre-processing frame 21 is equipped with a pre-processing mechanism, which first presses down on the two shorter hinges on the packaging box to close it.

[0028] Then the packaging box moves again after being unlocked by the pre-processing mechanism. At this time, the packaging box continues to be conveyed forward with the automatic sealing table 1. As the packaging box continues to move, the sealing component 4 runs synchronously with the conveyor belt 32. The front end of the baffle 52 gradually enters the upper side of the packaging box, that is, above the opening area when the two longer hinges are not yet closed.

[0029] Once the front end of the baffle 52 has entered the upper area of ​​the packaging box, the drive block 22 on the pre-processing frame 21 is activated. The drive block 22 drives the lever 23 to move in opposite directions while pressing down, pressing down the two longer hinges on the packaging box. At this time, the baffle 52 is just clamped under the two longer hinges.

[0030] Because the conveying speed of the automatic sealing station 1 is lower than that of the conveyor belt 32, during subsequent conveying, the packaging box gradually moves towards the side closer to the abutment block 42 relative to the sealing assembly 4. This causes the abutment plate 52 to gradually extend into the area below the two longer hinges until the front end of the packaging box abuts against the abutment block 42 and is positioned. After positioning, the electric push rod 43 is activated, causing the tape sealing machine 47 to descend and abut against the top surface of the packaging box to complete the sealing. At the same time, the labeling machine completes the label application. The entire process is completed while the carton is in continuous motion.

[0031] It should be emphasized that the core improvement of this embodiment is: in response to the problem that existing carton sealing and labeling equipment must stop the carton before it can be operated, this solution sets up multiple sealing components 4 that move in a cycle with the conveyor belt 32, and uses the speed difference between the automatic sealing table 1 and the conveyor belt 32 to make the carton naturally move towards the abutment block 42 in the sealing component 4 to complete the positioning while in continuous motion, thereby realizing the synchronous movement of the sealing component 4 and the carton.

[0032] Simultaneously, through the cooperation of the damper 51 and the pull rope on the damping shaft 54, the stop plate 52 maintains a stable extended position in the initial state. Then, utilizing the step-by-step operation sequence of the pre-processing component 2, the short hinge is closed first, and then the long hinge is closed after the stop plate 52 enters, allowing the stop plate 52 to naturally insert under the long hinge. This concept transforms the equipment waiting for the carton into the equipment following the carton, solving the intermittent pauses in the traditional solution.

[0033] It should be noted that the drive block 22 in the preprocessing component 2 has a bidirectional output structure. The two actuating rods 23 connected to its output end can move simultaneously towards each other, synchronously pressing the longer hinges on both sides of the packaging box. The actuating rods 23 must be activated only after the front end of the stop plate 52 has entered the opening area above the packaging box. Otherwise, if the hinge is pressed down first and then an attempt is made to insert the stop plate 52 under the hinge, it will not be possible because the hinge is already closed. Therefore, the timing of the actuating rods 23 and the running position of the conveyor belt 32 need to be linked and controlled, which can be achieved through a position sensor or a mechanical cam trigger.

[0034] It should be noted that the initial state of the pull rope wound on the damping shaft 54 ​​is that the pull rope is in a fully tightened state, and the damping characteristics of the damping shaft 54 ​​prevent it from rotating on its own under the torque transmitted by the thrust of the damper 51 through the pull rope.

[0035] In other words, the damping shaft 54 ​​is equivalent to a one-way controllable rope release device. The rope will only be released when the external gear transmission mechanism actively drives the damping shaft 54 ​​to rotate. The thrust of the damper 51 alone is insufficient to rotate the damping shaft 54 ​​to release the rope by pulling the rope.

[0036] This feature ensures that throughout the entire sealing operation, the baffle 52 is always restrained by the pull rope in the support position below the hinge and will not be accidentally pulled out when the tape sealing machine 47 applies pressure.

[0037] In this embodiment, the speed difference between the automatic sealing station 1 and the conveyor belt 32 needs to be designed to match the size of the packaging box and the spacing between the sealing components 4.

[0038] The speed difference should ensure that within the time it takes for the sealing assembly 4 to travel from the exit of the pretreatment assembly 2 to leave the working area, the carton is just able to come together completely at the abutment block 42.

[0039] Excessive speed difference can cause excessive relative sliding friction between the carton and the sealing assembly, damaging the outer surface of the carton. Insufficient speed difference can lead to the carton not being positioned correctly within the limited working stroke, affecting the subsequent sealing accuracy.

[0040] Example 2 It is understandable that in Embodiment 1, when the tape sealing machine 47 seals the top surface of the packaging box with tape, the electric push rod 43 drives the tape sealing machine 47 to press down against the top surface of the packaging box.

[0041] However, after being pressed by the lever 23, the two longer hinges of the packaging box only rely on their own crease stress to maintain a closed state, without any continuous supporting force from below. When the tape sealing machine 47 applies downward application pressure, the two longer hinges are prone to indentation or springing up due to the lack of support from below. This results in the top surface of the carton not being flat enough after the tape is applied, and there are air bubbles or wrinkles between the tape and the surface of the carton, which seriously affects the sealing quality.

[0042] like Figures 6 to 11 To solve the above problems, after the carton is brought close to the abutment block 42 and positioned, the baffle 52 is completely located below the two longer hinges of the carton.

[0043] The baffle plate 52 is made of a thin, hard, and smooth material, specifically a stainless steel sheet with a thickness of 0.5mm to 1.5mm or a spring steel plate that has been mirror-polished.

[0044] The thin material is chosen to ensure it can smoothly enter and exit through the narrow gap between the hinge and the side wall of the carton; the rigid material is chosen to prevent bending deformation when the tape sealing machine 47 applies downward pressure, providing a reliable rigid support surface for the hinge; the smooth material is chosen to reduce friction between the material and the inner surface of the hinge during subsequent extraction, ensuring smooth extraction and preventing peeling force on the already applied tape.

[0045] The working principle of the support function of the baffle plate 52: When the electric push rod 43 is started, it drives the tape sealing machine 47 to descend to contact the top surface of the packaging box, and the tape sealing machine 47 starts to work.

[0046] The working process of the tape sealing machine 47 is as follows: It is equipped with a tape roll and a pressure roller mechanism. The pressure roller draws the tape from the roll and presses the tape adhesive surface onto the top surface of the carton with a certain pressure. As the sealing assembly 4 moves synchronously with the carton, the pressure roller continuously applies the tape along the center seam of the top surface of the carton.

[0047] During this process, the pressure roller applies downward pressure to the top surface of the carton, which is transmitted through two longer hinges to the abutment plate 52 below the hinges. Since the abutment plate 52 is made of rigid material and is rigidly connected to the abutment block 42 through a groove, it can provide sufficient reaction force support for the hinges, ensuring that the hinges will not dent inward due to the pressure of the pressure rollers during the attachment process.

[0048] The presence of the baffle 52 keeps the upper surfaces of the two longer hinges in the same plane, and forms a tight, gapless fit between the tape and the carton surface, significantly improving the sealing quality.

[0049] It should be emphasized that the core improvement of this embodiment is: in response to the problem that the tape does not adhere tightly due to the lack of support under the hinge during the sealing process, this solution forms a rigid support surface under the hinge by setting a baffle plate 52 made of hard, smooth, thin plate material.

[0050] The thin-walled design of the baffle 52 allows it to enter the working position through the narrow space between the carton hinges, while its rigidity ensures that it does not deform under the pressure of the tape sealing machine 47. Its smooth surface creates low-friction conditions for subsequent removal. The synergy of these three material properties allows the baffle 52 to provide reliable support during the sealing process and to be smoothly removed when needed without affecting the already applied tape.

[0051] It should be noted that the tape sealing machine 47 is connected to the moving plate 44 via the connecting plate 46 and the damping telescopic rod 45. During the normal carton sealing stage, i.e., when the tape sealing machine applies tape to the top surface of the carton, the damping telescopic rod 45 is in a naturally extended state and does not shorten.

[0052] During this stage, the downward stroke of the electric push rod 43 causes the pressure roller of the tape sealing machine 47 to contact the top surface of the carton with appropriate pressure. The magnitude of this pressure is determined by the output force of the electric push rod 43 and the damping coefficient of the damping telescopic rod 45.

[0053] After the tape sealing machine 47 finishes applying the tape to the center seam of the top surface of the carton, the tape needs to continue to extend to the front and back sides of the carton and be applied to finish. That is, the tape needs to be folded down from the top surface of the carton along the front and back sides for a certain length and then cut to ensure the firmness and airtightness of the seal.

[0054] It should be noted that the labeling machine is mounted on the moving plate 44, with the labeling head facing the top of the carton. As the electric push rod 43 drives the moving plate 44 downward, the labeling machine descends synchronously with the moving plate 44 to a working height close to the top of the carton.

[0055] The working sequence of the labeling machine is set as follows: during the same time period after the tape sealing machine 47 completes the tape application on the top seam of the carton and performs the side finishing operation, the labeling machine starts to apply the label to the designated position on the top surface of the carton away from the center seam.

[0056] Since both the labeling machine and the tape sealing machine 47 are mounted on the same moving plate 44, they share the downward stroke of the electric push rod 43 to achieve working height positioning, eliminating the need for an additional lifting drive mechanism. This simplifies the structure while ensuring that labeling and sealing operations are completed synchronously within the same work cycle. The labeling machine is equipped with a label roll and a peeling plate. When the label is pulled from the roll through the peeling plate, the backing paper separates from the label, and the label is adhered to the top surface of the carton under the pressure of the cylinder or spring of the labeling head.

[0057] In this embodiment, as a preferred option, the baffle 52 can be designed as a wedge-shaped cross-section that gradually thins along the extraction direction. That is, the end of the baffle 52 near the inside of the carton and the end away from the damper is thicker, while the end near the damper, i.e., the front end in the extraction direction, is thinner.

[0058] The motivation for this design is that when the baffle 52 is pulled out of the carton, the gap between the hinge and the upper surface of the baffle 52 gradually decreases as the baffle is pulled out, and the hinge gradually fits together rather than suddenly collapses during the process of pulling out the baffle 52.

[0059] If the baffle 52 has a uniform thickness cross-section, the hinge will suddenly lose support and fall the instant the end of the baffle 52 is fully withdrawn. The applied tape may become loose or wrinkled due to the sudden fall of the hinge. The wedge-shaped cross-section, however, allows the hinge to gradually descend and adhere to the side wall of the carton as it passes through the thinning area of ​​the baffle 52, while the tape remains taut throughout. This design is suitable for scenarios requiring a high degree of flatness in the sealed carton appearance. For general packaging requirements, a baffle 52 with a uniform thickness cross-section can also meet the needs. Example 3 Understandably, in Embodiment 2, after the tape sealing machine 47 finishes applying the tape to the center seam of the top surface of the carton, the tape needs to be folded and applied to the front and back sides of the carton to finish the process.

[0060] However, at this time, the baffle 52 is still located below the two longer hinges. The physical presence of the baffle 52 prevents the tape sealing machine 47 from moving down to the side of the carton to complete the folding and finishing operation.

[0061] Therefore, the baffle 52 needs to be removed from the carton after the top tape is applied. At the same time, after being removed, the transmission components such as the rack 58, synchronous gear 57, bevel gear set, and damping shaft 54 ​​in the sealing assembly 4 are all in non-initial positions. If they are not reset, they cannot enter the next working cycle.

[0062] There are two problems that need to be solved: first, how to automatically trigger the withdrawal of the baffle plate 52 by using the continued downward action of the electric push rod 43; second, how to achieve automatic overall reset after the sealing assembly 4 has completed its work.

[0063] like Figures 12 to 14 To solve the above problems, a first bevel gear 55 is installed at the top of the damping shaft 54. A second bevel gear 56 is meshed with one end of the first bevel gear 55. A synchronizing gear 57 is installed at one end of the second bevel gear 56. The synchronizing gear 57 and the second bevel gear 56 are coaxially arranged and are both rotatably connected to the support base 53.

[0064] A rack 58 is slidably connected to the outer surface of the sealing frame 41. A groove is provided on the rack 58. The end of the pressing rod 48, which is fixedly connected to one end of the moving plate 44, extends into the groove and abuts against the inner wall of the groove.

[0065] A limiting groove is formed on the outer surface of the rack 58, and a spring is installed in the limiting groove. A limiting block is installed at one end of the spring, and the limiting block can protrude from the outer surface of the rack 58 under the action of the spring. A positioning block 59 is installed on the support base 53. A locking groove matching the limiting block is formed in the positioning block 59, and an elastic release rod 60 matching the release block is installed at one end of the positioning block 59.

[0066] The diameter of the second bevel gear 56 is much larger than that of the synchronous gear 57, while the diameter of the first bevel gear 55 is much smaller than that of the second bevel gear 56.

[0067] Working principle of the baffle plate extraction and overall reset mechanism: After the tape sealing machine 47 finishes applying the tape to the center seam of the top surface of the carton, the electric push rod 43 continues to drive the moving plate 44 to move downward.

[0068] Since the stop plate 52 is located below the hinge and obstructs the further downward movement of the tape sealing machine 47, the tape sealing machine 47 cannot continue to move downward. At this time, the damping telescopic rod 45 shortens to absorb the displacement difference between the moving plate 44 and the tape sealing machine 47, while the moving plate 44 itself continues to move downward under the drive of the electric push rod 43.

[0069] As the movable plate 44 continues to move downward, it causes the pressing rod 48 to move downward. The pressing rod 48 pushes the rack 58 to slide downward along the outer surface of the sealing frame 41 through the groove.

[0070] It should be noted that during the initial downward movement of the tape sealing machine 47 to the top of the carton, the pressing rod 48 had already pushed the rack 58 downward a certain distance, so that the tooth surface of the rack 58 was exactly at the starting position of meshing with the synchronous gear 57.

[0071] Therefore, when the pressing rod 48 pushes the rack 58 to continue moving downwards, the rack 58 effectively meshes with the synchronizing gear 57 and drives the synchronizing gear 57 to rotate.

[0072] Since the synchronizing gear 57 and the second bevel gear 56 are coaxially connected, the rotation of the synchronizing gear 57 synchronously drives the second bevel gear 56 to rotate at the same angular velocity.

[0073] Furthermore, since the diameter of the second bevel gear 56 is much larger than that of the first bevel gear 55, when the two mesh and transmit power, the rotational speed of the first bevel gear 55 is much higher than that of the second bevel gear 56. As a result, the damping shaft 54, which is coaxially connected to the first bevel gear 55, obtains a number of rotations much greater than that of the synchronous gear 57.

[0074] The multiple rotations of the damping shaft 54 ​​cause a large amount of the pull rope wrapped around its outer periphery to be released. After the pull rope is relaxed, it no longer restrains the stop plate 52. Meanwhile, the damper 51 continuously applies a thrust to the stop plate 52 in the extraction direction. At this time, after the pull rope restraint is removed, the thrust of the damper 51 drives the stop plate 52 to be pulled out from under the carton hinge.

[0075] Because the stop plate 52 is made of a thin, hard, and smooth material, the friction between it and the inner surface of the hinge is very small, so it can be smoothly pulled out under the thrust of the damper 51.

[0076] After the baffle 52 is pulled out, the two longer hinges lose their support from below and naturally adhere to the side wall of the carton. If a wedge-shaped cross section is used, the adhesion will be gradual. At this time, the tape sealing machine 47 is no longer obstructed and can continue to move down to the side of the carton under the drive of the electric push rod 43. Through its pressure roller mechanism, the tape that has been attached to the top surface of the carton is folded and extended to the front and rear sides of the carton for a certain length before being cut by the built-in cutter, completing the side finishing operation of tape sealing.

[0077] At the same time, the labeling machine installed on the moving plate 44 also completes the affixing of the label to the top of the carton at this stage.

[0078] When the rack 58 moves downward to the set end position, the spring in the limiting groove on the outer surface of the rack 58 will pop the limiting block outward. The limiting block will then be locked into the locking groove in the positioning block 59 on the support base 53, locking the rack 58 in the current position.

[0079] The locking mechanism is designed to prevent the rack 58 from retracting itself due to vibration or its own weight during the subsequent cyclic operation of the sealing assembly 4 driven by the conveyor belt 32, thus preventing disruption of the transmission chain.

[0080] After the sealing and labeling operations are completed, the electric push rod 43 retracts, causing the moving plate 44 to rise. The sealing assembly 4 leaves the working area and enters the return path as the conveyor belt 32 rotates. The finished packaging box continues to be transported to the next process through the automatic sealing table 1.

[0081] When the sealing assembly 4 moves with the conveyor belt 32 to the position of the release block fixedly installed on the support frame 31, the elastic release rod 60 installed at one end of the positioning block 59 abuts against the release block. The release block applies a pushing force to make the elastic release rod 60 elastically deform and squeeze the limit block in the locking groove, pushing the limit block out of the locking groove and retracting it into the limit groove of the rack 58, thus unlocking the rack 58.

[0082] After the rack 58 is unlocked, the pull rope is rewound and tightened under the damping return torque of the damping shaft 54. The rack 58 rises back to its initial position under the reverse transmission of the gear set driven by the tightening of the pull rope. The stop plate 52 overcomes the thrust of the damper 51 under the tension of the tightening pull rope and returns to its initial extended position. The damping telescopic rod 45 returns to its natural extension length. The entire sealing assembly 4 returns to its initial working state and can be put into the next sealing and labeling cycle.

[0083] It should be emphasized that the core improvement of this embodiment is as follows: In response to the two problems that the baffle 52 needs to be pulled out in time after completing its supporting function to allow the tape to be finished on the side, and the overall automatic reset after the work cycle is completed, this solution automatically converts the continued pressing action of the electric push rod 43 into the displacement of the rack 58 through the cooperation of the pressing rod 48 and the groove. Then, through the two-stage speed-increasing transmission of the synchronous gear 57 and the bevel gear set, the damping shaft 54 ​​releases a sufficiently long pull rope to release the constraint on the baffle 52.

[0084] This allows the timing of the withdrawal of the baffle 52 to automatically correspond to the timing of the tape being attached to the top surface, eliminating the need for sensors or controllers to determine the timing. For resetting, the spring self-locking structure of the limit block and the locking groove maintains the final working state, and the release block fixedly set on the return path of the conveyor belt 32 triggers the elastic release rod 60 to complete the unlocking, achieving a fully mechanical automatic cyclic reset.

[0085] It should be noted that when the electric actuator 43 drives the moving plate 44 downward, the pressing rod 48 moves downward and abuts against the lower wall of the groove, thereby pushing the rack 58 to slide downward and driving the subsequent gear transmission chain to complete the extraction of the stop plate 52.

[0086] After the sealing operation is completed, the electric push rod 43 retracts, causing the moving plate 44 to move upward and reset, and the pressing rod 48 moves upward accordingly. However, at this time, the rack 58 has been locked in the locking groove of the positioning block 59 by the limit block and is locked in its current position, so the rack 58 will not move upward.

[0087] Therefore, the pressing rod 48 slides upward in the groove and disengages from the lower wall of the groove, thereby separating the pressing rod 48 from the rack 58 and preventing interference with or damage to the locked rack when the pressing rod moves upward.

[0088] Subsequently, when the sealing assembly 4 moves with the conveyor belt 32 to the release block position, the elastic release rod 60 is triggered, the limit block disengages from the locking groove, the rack 58 is unlocked, and it rises back to the initial position under the reverse transmission of the gear set.

[0089] After the rack 58 is reset, the pressing rod 48 is back in the correct relative position in the groove, that is, it abuts against the lower wall of the groove, which meets the cooperation requirement of the pressing rod 48 pushing the rack 58 down again in the next working cycle.

[0090] It should be noted that the specific parameter setting logic for the speed-increasing design of the gear transmission is as follows: the rack 58 is limited by the size of the sealing frame 41, and the available effective meshing stroke is relatively short, usually 20mm to 40mm. In order to completely cover the width of the two longer hinges on the top surface of the carton, the length of the baffle 52 is usually 150mm to 300mm. Correspondingly, the length of the pull rope that the damping shaft 54 ​​needs to release is also in the range of 150mm to 300mm.

[0091] Assuming the rope diameter of the damping shaft 54 ​​is 10mm, it takes about 6.4 rotations of the damping shaft 54 ​​to release 200mm of rope.

[0092] If the synchronizing gear 57 rotates only about 0.5 revolutions within the effective travel 30mm of the rack 58, then the speed needs to be increased from 0.5 revolutions to 6.4 revolutions, which requires a total speed increase ratio of about 12.8 times.

[0093] By setting the coaxial speed ratio of the second bevel gear 56 and the synchronous gear 57 to 1:1, and setting the diameter ratio of the second bevel gear 56 and the first bevel gear 55 to approximately 13:1, the desired speed increase effect can be achieved. In practical applications, the diameter ratio of each gear can be adjusted according to specific size requirements.

[0094] In this embodiment, the release block is fixedly installed on the support frame 31 at a return path position away from the sealing working area. The motivation for this design is to set the reset trigger point on the return path after the sealing assembly 4 has completely left the carton working area, ensuring that the sealing assembly 4 maintains the final working state of the rack 58 locked and the stop plate 52 pulled out throughout the entire working stroke, avoiding premature reset before the carton has completely detached from the sealing assembly 4, which could lead to mechanical interference or damage to the carton.

[0095] The elastic release lever 60 is made of elastic metal or elastic plastic and has a certain degree of bending elasticity. When it comes into contact with the release block and is pushed and bent to make the limit block disengage from the locking groove, the elastic release lever 60 can automatically return to its original shape without affecting the normal locking engagement between the limit block and the locking groove in the next cycle.

[0096] The release block is a protrusion or inclined structure fixed on the support frame 31. Its shape design allows the elastic release rod 60 to be subjected to a gradual thrust upon contact, avoiding fatigue fracture of the elastic release rod 60 caused by instantaneous impact.

[0097] The technical solutions of the three embodiments described above can be combined and implemented in different ways. The conveyor belt 32 follow-up sealing scheme of Embodiment 1 can be implemented independently and is suitable for scenarios where the flatness requirement of the sealing box is generally low and only continuous sealing and labeling without stopping the machine is required.

[0098] In scenarios where high sealing quality is required, Embodiment 1 and Embodiment 2 can be combined to improve the tightness of tape adhesion by utilizing the rigid support of the baffle 52 and the preferred wedge-shaped cross-section design. In high-speed production lines that require fully automated continuous cyclic operation, all three embodiments should be implemented in combination. The gear-driven linkage extraction mechanism and the automatic reset mechanism of the release block ensure that the sealing assembly 4 automatically completes the entire process of support, extraction, finishing, and reset in each work cycle, achieving unmanned continuous production.

[0099] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. An automatic carton sealing and labeling device, characterized in that, include: Automatic sealing station (1), the top of which is equipped with a pre-processing component (2) and a rotating component (3); The pre-processing component (2) includes a pre-processing frame (21), which is installed on the top of the automatic sealing table (1). A drive block (22) is installed on the top of the pre-processing frame (21), and a toggle lever (23) is installed at the output end of the drive block (22). A rotating assembly (3) includes a support frame (31) mounted on the top of an automatic sealing table (1). A conveyor belt (32) and a release block are mounted on the support frame (31). Multiple evenly distributed sealing assemblies (4) are mounted on the conveyor belt (32). Each sealing assembly (4) contains a tape sealing machine (47), a blocking assembly (5), and a labeling mechanism. The labeling mechanism includes a labeling machine mounted on a moving plate (44), with the labeling head of the labeling machine facing the top surface of the carton. The sealing assembly (4) includes a sealing... A box frame (41) is connected to a conveyor belt (32) at one end. An abutment block (42) is installed at the bottom of the box frame (41). An electric push rod (43) is installed on the inner wall of the box frame (41). A moving plate (44) is installed at the output end of the electric push rod (43). A damping telescopic rod (45) is installed at the bottom of the moving plate (44). A pressing rod (48) is fixedly connected to one end of the moving plate (44). A connecting plate (46) is installed at the bottom of the damping telescopic rod (45). The bottom end of the connecting plate (46) is connected to a tape sealing machine (47).

2. The automatic carton sealing and labeling device as described in claim 1, characterized in that, The blocking component (5) includes a damper (51) installed at one end of the sealing frame (41), and a blocking plate (52) is installed at the output end of the damper (51). The blocking plate (52) is slidably connected to the groove opened in the abutment block (42).

3. The automatic carton sealing and labeling device as described in claim 1, characterized in that, The blocking component (5) also includes a support base (53) installed at one end of the sealing frame (41). A damping shaft (54) is installed at the top of the support base (53). A pull rope is wound around the outer periphery of the damping shaft (54). The pull rope is connected to the blocking plate (52).

4. The automatic carton sealing and labeling device as described in claim 3, characterized in that, The damping shaft (54) is equipped with a first bevel gear (55) at its top end. A second bevel gear (56) is meshed with one end of the first bevel gear (55). A synchronizing gear (57) is installed at one end of the second bevel gear (56). The synchronizing gear (57) is rotatably connected to the support base (53).

5. The automatic carton sealing and labeling device as described in claim 4, characterized in that, A rack (58) is slidably connected to the outer surface of the sealing frame (41), and the rack (58) meshes with the synchronous gear (57).

6. The automatic carton sealing and labeling device as described in claim 5, characterized in that, The rack (58) has a groove, and the inner wall of the groove abuts against the pressing rod (48).

7. The automatic carton sealing and labeling device as described in claim 5, characterized in that, A limiting groove is formed on the outer surface of the rack (58), a spring is installed in the limiting groove, and a limiting block is installed at one end of the spring.

8. The automatic carton sealing and labeling device as described in claim 3, characterized in that, A positioning block (59) is installed on the support base (53). A locking groove matching the limiting block is opened in the positioning block (59). An elastic release rod (60) matching the release block is installed at one end of the positioning block (59).

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