Full-automatic intelligent label supplementing and marking table

Abstract

The application discloses a full-automatic intelligent label supplementing station, and relates to the technical field of packaging machinery. The device comprises a label station connecting support, a rigid main frame, an automatic label changing box platform assembly, a label storage box assembly, a label protecting device assembly, a label supplementing motion device assembly, a lifting assembly and a PLC control system. The label box is precisely conveyed through magnetic attraction cooperation of the bottom magnet and the synchronous belt. The device is provided with a large-capacity label storage structure and an independent empty box bin, and automatic box feeding and changing are realized through cooperation of the servo drive. The label protecting device assembly protects the label from collapse and deviation during the label changing transition period. The label supplementing motion device adopts servo torque closed-loop control to realize constant-tension label supply. The lifting assembly can precisely adjust the overall height of the device. The application realizes full-automatic label supplementing operation without shutdown, effectively reduces label lap joint error, greatly prolongs the unmanned operation time, has high positioning accuracy and strong adaptability, can be adapted to various high-speed label sticking production lines, and significantly improves production efficiency and reduces labor cost and product scrap rate.

Description

Technical Field

[0001] This invention relates to the field of packaging machinery technology, specifically to a fully automatic intelligent label replacement station. Background Technology

[0002] Cold glue labeling machines are widely used in various container packaging production lines, and the label table is the core component that ensures continuous labeling. Traditional label tables rely on manual replenishment, requiring a stoppage every 5-10 minutes for relabeling, with each relabeling session taking approximately 2-3 minutes. This results in 30-50 stoppages in an 8-hour shift, leading to a 10-15% loss of effective production time. Furthermore, manual overlap errors of 3-8mm easily cause double labels to overlap or break, resulting in defective products.

[0003] Chinese invention patent CN202728666U discloses an automatic label-changing device for a cold glue labeling machine. This device has up to three label box storage positions and uses a cylinder to push the label boxes sequentially into the working position, reducing manual intervention to some extent. However, this solution has the following shortcomings: First, the cylinder-driven pushing method makes it difficult to precisely control the pushing force, easily damaging the label boxes and limiting positioning accuracy; second, it lacks a label tension control mechanism, failing to adapt to the overlapping requirements of labels of different thicknesses, resulting in an overlap error of 3-6mm; third, there is no protective mechanism during the label-changing process, allowing labels to easily collapse and shift under their own weight or airflow during the label-changing intervals, resulting in a label-changing time exceeding 30 seconds, a maximum label storage capacity of 3 boxes, and an unattended operation time of less than 30 minutes, still requiring frequent manual intervention.

[0004] In addition, the existing patent CN105645157A discloses a label supply device that uses a friction roller drive method, which is a passive friction drive and cannot achieve active tension control, with an overlap error of 3-5mm; US4369089A and EP1163155B1 disclose rotary disc type and manual card box type label supply solutions respectively, both of which require stopping the machine to change labels and have no label protection mechanism, which cannot meet the needs of high-speed continuous production lines.

[0005] Existing cold glue labeling machines and automatic label changing devices have problems such as small label storage capacity, need to stop the machine for label changing, inability to automatically control label tension, and labels being prone to collapse and displacement during the label changing transition period. They cannot meet the long-term unattended operation requirements of high-speed continuous production lines. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned problems and provide a fully automatic intelligent label replacement station. To achieve the above objective, this invention adopts the following technical solution: A fully automatic intelligent label replacement table includes a cold glue labeling machine label table, wherein the cold glue labeling machine label table includes a label station connecting seat and a label box, the label box being placed on the label table surface, characterized in that it includes: The labeling station connecting support is provided with an adjusting foot at the bottom, and the labeling station connecting support is fixedly connected to the labeling station of the cold glue labeling machine; The main frame of the automatic label changing box is a rigid frame consisting of front longitudinal beams, rear cross beams and uprights connected by high-strength bolts. The bottom of the main frame is fixed to the label station connecting support. An automatic label changing box platform assembly includes a platform track plate and a belt servo motor. The platform track plate is fixed inside the main frame, and the belt servo motor is installed on the top of the main frame and connected to the synchronous belt drive via a drive shaft. The label box assembly is located in the box supply area at the rear section of the platform track plate, and includes an empty box compartment, which is located on one side of the box supply area; The label protector assembly includes a label protector guide rail and a label protector cylinder, wherein the label protector guide rail is fixed on the main frame and the label protector cylinder is mounted on the main frame; The supplementary marking motion device assembly includes a wire-pulling servo motor and a winding wheel. The wire-pulling servo motor is connected to the main frame, and the winding wheel is drivenly connected to the output shaft of the wire-pulling servo motor. The label-pushing cylinder is connected to the main frame via a cylinder mounting plate, and the piston rod of the label-pushing cylinder is connected to the label-pushing rod. An automatic label changing box lifting assembly includes a lifting base plate, the lifting base plate supporting the main frame, and the automatic label changing box lifting assembly is connected between the label station connecting support and the main frame; Sensors are installed at both ends of the platform track plate and are fixedly connected to the main frame; The PLC control system is electrically connected to the belt servo motor, the wire pull servo motor, the label protection cylinder, the label pusher cylinder, the lifting servo motor, and the sensors.

[0007] As an improvement, a strong magnet is embedded in the bottom of the label box, and a metal protrusion is provided on the synchronous belt. The strong magnet and the metal protrusion are magnetically attracted to each other, and two strong magnets are symmetrically installed at the bottom of each label box.

[0008] As an improvement, the label protector assembly also includes a label protector plate, a left mounting plate, a right mounting plate, and a cylinder connector. The left mounting plate and the right mounting plate are respectively bolted to both sides of the main frame. The two ends of the label protector guide rail are respectively connected to the left mounting plate and the right mounting plate. The piston rod of the label protector cylinder is connected to the label protector plate through the cylinder connector. The label protector plate is slidably mounted on the label protector guide rail.

[0009] As an improvement, the label box assembly further includes spring spacers, a positioning cylinder, a box guide rail, and an angle adjustment rod. The box guide rail is symmetrically arranged on both sides of the rear section of the platform track plate. The spring spacers are spaced apart between adjacent label boxes along the direction of the box guide rail. The positioning cylinder is installed at the end of the box guide rail. The empty box compartment is located on one side of the label box assembly. The angle adjustment rod can adjust the angle of the empty box compartment.

[0010] As an improvement, the label replacement motion device assembly also includes a speed reducer, a pull cable, a label movable door, a pull cable tension detector, and a pull cable spring box. The speed reducer is connected between the pull cable servo motor and the winding wheel. One end of the pull cable is wound on the winding wheel, and the other end is pre-tightened by the pull cable spring box and then passes through the guide mechanism to connect with the label movable door. The pull cable tension detector is installed on the side of the movement path of the label movable door.

[0011] As an improvement, the cylinder mounting plate is positioned and connected to the main frame by a positioning pin, an elastic buffer pad is installed at the front end of the push rod, and an air source connector is provided on the cylinder body of the push cylinder.

[0012] As an improvement, the automatic label changing box lifting assembly also includes a lifting screw, a lifting follower rod, and a translation mounting block. The lifting servo motor is fixed on the lifting base plate and is connected to the lifting screw via a transmission. The lifting screw is engaged with the lifting base plate through a nut pair. The lifting follower rod is symmetrically arranged on both sides of the lifting screw, with its upper end fixedly connected to the main frame and its lower end slidingly engaged with the lifting base plate through the translation mounting block.

[0013] As an improvement, the marker station connecting support is equipped with a rotary cylinder and a joint bearing assembly. The rotary cylinder is connected to the support body of the marker station connecting support at an adjustable angle through the joint bearing assembly. A guide copper sleeve is fixed at the bottom of the marker station connecting support. An oil-impregnated bearing is press-fitted inside the guide copper sleeve. The oil-impregnated bearing slides with the sliding shaft. The lifting guide rod is vertically installed on the support body.

[0014] As an improvement, an HMI touch screen is installed on the left side panel of the main frame. The HMI touch screen is communicatively connected to the PLC control system. A pneumatic control valve group is fixed at the lower front of the main frame. The air inlet of the pneumatic control valve group is connected to an external air source through an air pipe, and the air outlet is connected to the air inlets of the label protection cylinder, the label pushing cylinder, and the waiting cylinder, respectively.

[0015] As an improvement, the platform track plate is also provided with a guide shaft and a limiting block. The guide shaft is arranged parallel to both sides of the synchronous belt along the label box conveying direction and is fixedly connected to the platform track plate. The limiting block is fixed at both ends of the platform track plate. The main frame is made of stainless steel and aluminum alloy.

[0016] The advantages of this invention are: 1. This invention allows for label replacement without stopping the machine, with each label replacement taking approximately 12 seconds, thus improving production efficiency; 2. This invention uses a closed-loop control of the label tension via torque feedback from a pull-wire servo motor, resulting in an overlap error of less than 1.5mm, which is lower than existing technologies and significantly reduces the scrap rate. 3. The present invention features a large-capacity storage box of 6 to 8 boxes combined with an independent empty box compartment, which can operate continuously unattended for more than 2 hours at a time, reducing the labor intensity of operators; 4. The label protection cylinder interlock control mechanism of this invention effectively protects the label from collapsing during the label replacement transition period, resulting in a high success rate for label replacement; 5. The lifting servo motor of this invention, combined with the lead screw drive, achieves a positioning accuracy of less than 0.5mm, supports digital height preset and zero position memory, and can quickly adapt to various labeling machine models. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a fully automatic intelligent label replacement station.

[0018] Figure 2 This is a front view of a fully automatic intelligent label replacement station.

[0019] Figure 3 This is a structural diagram of the support for the marker station.

[0020] Figure 4 This is a structural diagram of the main frame of the automatic label changing box.

[0021] Figure 5 This is a structural diagram of the automatic label changing box platform components.

[0022] Figure 6 This is a structural diagram of the label box assembly.

[0023] Figure 7 This is a structural diagram of the protective marker assembly.

[0024] Figure 8 This is a structural diagram of the supplementary motion device assembly.

[0025] Figure 9 This is a structural diagram of the push-point cylinder.

[0026] Figure 10 This is a structural diagram of the automatic label changing box lifting assembly.

[0027] Figure 11 This is a top-down view of the working direction of a fully automatic intelligent label replacement station.

[0028] Figure 12 This is a front view of a fully automatic intelligent label replacement station (with electrical cabinet).

[0029] Figure 13 This is a structural diagram of a fully automatic intelligent label replacement station (with electrical cabinet).

[0030] Figure 14 This is a side sectional view of a fully automatic intelligent label replacement station (with electrical cabinet).

[0031] Figure 15 Block diagram of the servo torque feedback control principle for wire pulling Figure 16 This is a timeline diagram of the entire automatic label changing process.

[0032] The diagram is labeled as follows: 1. Station connection support; 11. Rotary cylinder; 12. Joint bearing assembly; 13. Sliding shaft; 14. Adjusting foot; 15. Lifting guide rod; 16. Electrical cabinet.

[0033] 2. Automatic label changing box main frame; 21. Front longitudinal beam; 22. Rear cross beam; 23. Upright pole; 3. Automatic label changing box platform assembly; 31. Belt servo motor; 32. Strong magnet; 33. Platform track plate; 34. Electromagnet mounting slot; 4. Label box assembly; 41. Waiting position cylinder; 42. Empty box compartment; 43. Angle adjustment rod; 5. Label protector assembly; 51. Label protector cylinder; 52. Label protector guide rail; 53. Label protector plate; 54. Left side mounting plate; 55. Right side mounting plate; 56. Cylinder connector; 6. Marking motion device assembly; 61. Wire pulling servo motor; 62. Winding reel; 63. Wire tension detector; 64. Wire pulling spring box; 7. Label-pushing cylinder; 71. Cylinder mounting plate; 72. Label-pushing rod; 73. Air source connector; 8. Automatic label changing box lifting assembly; 81. Lifting screw; 82. Lifting follower rod; 83. Lifting base plate; 84. Translation mounting block; 9. PLC control system; 91. HMI touch screen; 92. Pneumatic control valve assembly. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0035] In the description of the embodiments of this invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of the embodiments of the present invention, "multiple" means at least two.

[0038] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0039] The present invention will now be described in detail and specifically through specific embodiments to enable a better understanding of the invention. However, the following embodiments do not limit the scope of protection of the present invention. Technical solution

[0040] like Figures 1 to 16 As shown, a fully automatic intelligent label replacement table includes a cold glue labeling machine label table, which includes a label station connector and a label box. The label box is placed on the label table surface and includes: like Figure 3As shown, the labeling station connecting support 1 has an adjustable foot 14 at its bottom. The labeling station connecting support 1 is fixedly connected to the labeling station of the cold adhesive labeling machine. The labeling station connecting support 1 serves as a precision connection interface between the entire device and the labeling machine. It contains a rotary cylinder 11 and a spherical bearing assembly 12. The rotary cylinder 11 is connected to the support body at an adjustable angle via the spherical bearing assembly 12, adapting to the geometric differences of labeling stations of different models. A guide copper sleeve is fixed at the bottom of the support, and an oil-impregnated bearing is press-fitted inside the guide copper sleeve. The oil-impregnated bearing slides with the sliding shaft 13, forming a precision self-lubricating guide pair. The lifting guide rod 15 is vertically installed on the support body, assisting in constraining the vertical freedom of movement and ensuring smooth overall lifting. The adjustable foot 14 is located at the bottom of the support, adaptable to installation surfaces of different heights. Figures 12 to 14 As shown, an electrical cabinet 16 is installed next to the label station connection support 1 to support the entire intelligent label replacement station. The electrical cabinet 16 contains a power supply module to supply power to the entire label station.

[0041] like Figure 4 As shown, the main frame 2 of the automatic label changing box is a rigid frame formed by connecting the front longitudinal beam 21, the rear cross beam 22, and the uprights 23 with high-strength bolts. The bottom of the main frame is fixed to the label station connecting support 1. The main frame is the load-bearing skeleton of the entire device. The front longitudinal beam 21 is made of aluminum alloy profile, and the uprights 23 are made of stainless steel. Multiple uprights 23 are assembled with the front longitudinal beam 21 and the rear cross beam 22 with high-strength bolts to form a rigid frame structure, providing installation benchmarks and support for various functional components. An HMI touch screen 91 is installed on the left side panel of the main frame for human-machine interaction, allowing switching between automatic / manual modes, setting parameters, and viewing alarm information. A pneumatic control valve group 92 is fixed at the lower front of the main frame, centrally controlling all air circuits such as the label protection cylinder 51, the label pushing cylinder 7, and the waiting cylinder, facilitating maintenance and repair.

[0042] like Figure 5 As shown, the automatic label changing box platform assembly 3 includes a platform track plate 33 and a belt servo motor 31. The platform track plate 33 is fixed inside the main frame, and the belt servo motor 31 is mounted on the top of the main frame and connected to the synchronous belt via a drive shaft. The platform track plate 33 serves as the bearing surface for label box transfer. Guide shafts and a synchronous belt are arranged parallel to the label box transfer direction on the track plate 33. The guide shafts are located on both sides of the synchronous belt, guiding and constraining the movement of the label boxes. Limit blocks are provided at both ends of the platform track plate 33 to prevent the label boxes from overshooting and detaching. A powerful magnet 32 ​​is embedded in the bottom of the label box, and a metal protrusion is provided on the synchronous belt. The powerful magnet 32 ​​and the metal protrusion form a magnetic attraction for positioning. When the belt servo motor 31 drives the synchronous belt, the magnet moves along the guide shaft with the synchronous belt, achieving precise clamp-free transport of the label boxes without any mechanical clamps.

[0043] like Figure 6As shown, the label storage box assembly 4 is located in the label supply area at the rear of the platform track plate 33, including an empty box compartment 42, which is located on one side of the supply area. The label storage box assembly 4 can simultaneously accommodate 6 to 8 fully loaded label boxes for online supply. The box guide rails are symmetrically arranged on both sides of the rear section of the platform track plate 33, providing sliding channels for the label boxes. Spring spacers are provided between adjacent label boxes, spaced apart along the box guide rail direction, to prevent the label boxes from colliding and squeezing each other during conveying vibration. A waiting position cylinder 41 is installed at the end of the box guide rail to lock the last label box, which is automatically released when the belt servo motor 31 rotates forward and moves to the working position with the synchronous belt magnet. The empty box compartment 42 is located on one side of the label storage box assembly 4 and is specifically designed to receive empty label boxes after label replacement, eliminating the need for manual removal in real time. An angle adjustment rod 43 is connected to the empty box compartment 42, which can be finely adjusted according to the actual label box specifications to adapt to various box types.

[0044] like Figure 7 As shown, the label protector assembly 5 includes a label protector guide rail 52 and a label protector cylinder 51. The label protector guide rail 52 is fixed to the main frame, and the label protector cylinder 51 is mounted on the main frame. The label protector assembly 5 also includes a label protector plate 53, a left mounting plate 54, a right mounting plate 55, and a cylinder connector 56. The left mounting plate 54 and the right mounting plate 55 are respectively fixed to both sides of the main frame with bolts. The two ends of the label protector guide rail 52 are connected to the left mounting plate 54 and the right mounting plate 55 respectively, and are arranged perpendicular to the label conveying direction. The piston rod of the label protector cylinder 51 is connected to the label protector plate 53 through the cylinder connector 56, and the label protector plate 53 is slidably mounted on the label protector guide rail 52. During the label replacement transition period, the label protection cylinder 51 pushes out the label protection plate 53, which covers the top surface of the label at the working position from above the label box along the label protection guide rail 52, preventing the label from collapsing or shifting due to its own weight or airflow during the label replacement gap; after the new box is in place and clamped, the label protection cylinder 51 retracts the label protection plate 53, restoring normal label supply.

[0045] like Figure 8 As shown, the label replacement motion device assembly 6 includes a pull-wire servo motor 61 and a winding wheel 62. The pull-wire servo motor 61 is connected to the main frame, and the winding wheel 62 is driven by the output shaft of the pull-wire servo motor 61. The label replacement motion device assembly 6 also includes a reducer, a pull wire, a label sliding door, a pull wire tension detector 63, and a pull wire spring box 64. The reducer is connected between the pull-wire servo motor 61 and the winding wheel 62, serving to reduce speed and increase torque. One end of the pull wire is wound on the winding wheel 62, and the other end is pre-tensioned by the pull wire spring box 64 before passing through the guide mechanism and connecting to the label sliding door. The pull wire tension detector 63 is installed beside the movement path of the label sliding door to monitor the position of the label sliding door and the tension of the pull wire in real time. Figure 15The diagram shows the block diagram of the torque feedback control principle of the pull-string servo. The pull-string servo motor 61 operates in torque control mode, monitoring the motor current in real time and calculating the output torque. PID control maintains the pull-string tension within a preset range. When the label becomes thicker, the torque exceeds the limit and the output is automatically reduced. When the label is consumed and the movable door retracts, the pull-string is automatically released for compensation. When the movable door reaches the end of the label box, the pull-string tension detector 63 triggers a signal, and the PLC control system 9 immediately starts the next label-changing process. The pull-string spring box 64 provides a constant preload to prevent the pull-string from slack and ensure a continuous and seamless connection of the label boxes.

[0046] like Figure 9 As shown, the label-pushing cylinder 7 is connected to the main frame via a cylinder mounting plate 71, and the piston rod of the label-pushing cylinder 7 is connected to the label-pushing rod 72. The cylinder mounting plate 71 is precisely aligned with the main frame via a positioning pin to ensure the accuracy of the label-pushing direction. An elastic buffer pad is installed at the front end of the label-pushing rod 72. When the cylinder pushes out, it presses and clamps the stack of labels in the new label box. The elastic buffer pad can adapt to the compression differences of different paper labels. The cylinder body of the label-pushing cylinder 7 is equipped with an air source connector 73, and the clamping force can be adjusted by air pressure to adapt to different label materials.

[0047] like Figure 10 As shown, the automatic label changing box lifting assembly 8 includes a lifting base plate 83, which supports the main frame. The automatic label changing box lifting assembly 8 is connected between the label station connecting support 1 and the main frame. The automatic label changing box lifting assembly 8 also includes a lifting screw 81, a lifting follower rod 82, and a sliding mounting block 84. A lifting servo motor is fixed to the lifting base plate 83 and is connected to the lifting screw 81. The lifting screw 81 is engaged with the lifting base plate 83 via a nut pair. When the lifting servo motor drives the lifting screw 81 to rotate, the nut pair converts the rotational motion into linear lifting motion of the lifting base plate 83. The lifting follower rod 82 is symmetrically arranged on both sides of the lifting screw 81. Its upper end is fixedly connected to the main frame, and its lower end is slidably engaged with the lifting base plate 83 via the sliding mounting block 84, ensuring the smoothness and straightness of the lifting motion. The sliding mounting block 84 fixes the lifting follower rod 82 with bolts and is precisely aligned with the labeling machine mounting surface. The HMI touchscreen 91 offers two operation modes: jog adjustment and distance preset. It also supports setting the current position as the digital zero for repeated and precise positioning.

[0048] Sensors are installed at both ends of the platform track plate 33 and are fixedly connected to the main frame. They are used to detect the label box's arrival signal and the label remaining status in the label storage area, to prevent the label box from overshooting and falling out, and to provide a label replacement trigger signal for the PLC control system 9.

[0049] like Figure 1 , Figure 2As shown, the PLC control system 9 is electrically connected to the belt servo motor 31, the pull-wire servo motor 61, the label-protecting cylinder 51, the label-pushing cylinder 7, the lifting servo motor, and the sensors. The PLC control system 9 is the core of the entire device, coordinating the timing of the actions of each actuator to achieve precise control of the fully automated label-changing process. The PLC control system 9 also includes bottle-stopping interlock logic: when the label storage area is completely used up and there are insufficient labels at the working position, a bottle-stopping signal is output to the labeling machine and an audible and visual alarm is triggered to prevent unlabeled products from flowing out. All alarm events are recorded in the HMI touchscreen 91 log for traceability and query. Example

[0050] This embodiment discloses a fully automatic intelligent label replacement station.

[0051] like Figures 1 to 16 As shown, this embodiment includes the following: Overall structure and installation: like Figure 1 , Figure 2 As shown, the fully automatic intelligent label replacement station in this embodiment consists of a label station connecting support 1, an automatic label changing box main frame 2, an automatic label changing box platform assembly 3, a label storage box assembly 4, a label protector assembly 5, a label replacement motion device assembly 6, a label pushing cylinder 7, an automatic label changing box lifting assembly 8, and a sensor and PLC control system 9. The overall dimensions are approximately 1700mm × 1000mm × 1300mm (length × width × height), with a rated power of 0.75kW, a working air pressure of 0.6MPa, and a total weight of approximately 180kg (including a full label box).

[0052] During installation, a special transport vehicle pushes the device next to the labeling machine. After adjusting the overall height using the automatic label changing box lifting assembly 8, the label station connecting support 1 is fixedly connected to the labeling machine label station. The device can be put into use after inserting the quick-connect electrical interface (220V / 50Hz) and the air circuit interface (0.6MPa). The entire process takes no more than one working day.

[0053] Station connection support 1 component: like Figure 3 As shown, the labeling station connecting support 1 is the precision connection interface between this device and the labeling station of the labeling machine, and it is made of stainless steel. The main body of the connecting support is an integral cast frame. The rotary cylinder 11 is connected to the support body at an adjustable angle through the spherical bearing assembly 12, which can provide ±5° angle fine adjustment to adapt to the geometric differences of different labeling stations and ensure precise alignment between the label box and the label channel.

[0054] A guide copper sleeve is fixed at the bottom of the support, and an oil-impregnated bearing is press-fitted inside the guide copper sleeve. The oil-impregnated bearing slides with the sliding shaft 13 to form a precision self-lubricating guide pair, with a straightness of up to 0.1mm / 300mm. The lifting guide rod 15 is vertically installed on the support body to assist in constraining the vertical freedom of movement and ensure smooth overall lifting. Adjustable feet 14 are located on both sides of the bottom of the support to adapt to different mounting surfaces. The overall structure has high strength and is easy to assemble and disassemble.

[0055] Automatic label changing box main frame 2 components: like Figure 4 As shown, the main frame 2 of the automatic label changing box is assembled into a rigid frame by front longitudinal beams 21, rear cross beams 22, and multiple uprights 23 using high-strength bolts. The front longitudinal beams 21 are made of aluminum alloy profiles, which are lightweight and have good rigidity; the uprights 23 are made of stainless steel, which is corrosion-resistant and has high strength. The left side panel of the main frame integrates an HMI touchscreen 91, allowing the operator to switch between automatic / manual modes, set operating parameters, and view alarm information.

[0056] A pneumatic control valve group 92 is installed at the lower front of the main frame, which centrally controls all air circuits such as the label protection cylinder 51, the label pushing cylinder 7, and the waiting position cylinder 41, facilitating daily maintenance and troubleshooting. The belt servo motor 31 is installed on the top of the main frame, which transmits power to the synchronous belt through the drive shaft, driving the label box to move along the guide shaft.

[0057] Automatic label changing box platform component 3 and magnetic drive: like Figure 5 As shown, the automatic label changing box platform assembly 3 is the core transmission mechanism of this device, enabling precise, fixture-free transfer of label boxes. Guide shafts and a synchronous belt are arranged on the platform track plate 33. The guide shafts are made of stainless steel with a high surface finish, providing precise guidance and constraint for the movement of the label boxes. The synchronous belt is located between the two rows of guide shafts and is driven by a belt servo motor 31.

[0058] The platform track plate 33 is equipped with an electromagnet mounting slot 34. Two powerful magnets 32 are symmetrically embedded in the bottom of the label box. The powerful magnets 32 are axially magnetized rare-earth permanent magnets. The synchronous belt has metal protrusions, and the powerful magnets 32 and the metal protrusions form intermittent magnetic attraction positioning with a magnetic attraction force of not less than 25N. When the belt servo motor 31 drives the synchronous belt to rotate, the label box is smoothly moved along with the synchronous belt under the action of magnetic attraction. No mechanical clamps are required. The structure is simple, highly reliable, and can be adapted to label boxes of different widths.

[0059] Limit blocks are installed at both ends of the platform track plate 33 to prevent the label box from overshooting and falling out. Sensors are installed at both ends of the guide rail to detect the positioning signal of the label box. When the motor reverses, the empty box is moved towards the empty box compartment 42. When it rotates forward, the new box is sent from the label storage area into the working position. The whole process is smooth and reliable with high positioning repeatability.

[0060] Storage box assembly 4: like Figure 6 As shown, the label storage box assembly 4 is located at the rear of the platform track plate 33 and can accommodate 6 to 8 aluminum alloy label boxes simultaneously. The box guide rails are symmetrically arranged on both sides of the rear section of the platform, providing sliding channels for the label boxes. Each box can hold approximately 8,000 labels.

[0061] Spring spacers are installed between adjacent label boxes to prevent them from colliding and squeezing each other during conveyor vibration. The empty box compartment 42, located on one side of the label box assembly 4, is specifically designed to receive empty label boxes after labeling, eliminating the need for manual removal. An angle adjustment rod 43 is connected to the empty box compartment 42, allowing for fine-tuning of its angle according to the actual label box specifications, accommodating various box types. The last label box is locked by a waiting position cylinder 41, automatically releasing when the belt servo motor 31 rotates forward and moving to the working position with the magnet on the synchronous belt. With a full load of 8 boxes, it can operate continuously for over 2 hours at a production speed of 30,000 bottles / hour without manual intervention.

[0062] Protective tag component 5: like Figure 7 As shown, the label protector assembly 5 is the label replacement safety protection mechanism of this device, which is not described in the prior art. The left mounting plate 54 and the right mounting plate 55 are precisely positioned and fixed to the main frame by bolts. The two ends of the label protector guide rail 52 are connected to the left mounting plate 54 and the right mounting plate 55 respectively, and are arranged perpendicular to the label conveying direction.

[0063] The piston rod of the label protection cylinder 51 is connected to the label protection plate 53 via the cylinder connector 56. The label protection plate 53 is slidably mounted on the label protection guide rail 52. During label replacement, after the empty box is removed, the label protection cylinder 51 extends the label protection plate 53 after a delay. The label protection plate 53 covers the top surface of the label at the working position from above the label box, preventing the label from collapsing or shifting due to its own weight or airflow during the label replacement gap (approximately 4-6 seconds). After the new box is pushed and clamped, the label protection cylinder 51 retracts after a delay, with a timing error of less than 50ms, precisely controlled by the high-speed pulse output module of the PLC control system 9.

[0064] Pushing cylinder 7 and supplementary marker actuator assembly 6: like Figure 8 , Figure 9 As shown, the label-pushing cylinder 7 and the label-replenishing actuator assembly 6 are integrated into one unit. The cylinder mounting plate 71 is precisely aligned with the main frame via a positioning pin. The front end of the label-pushing rod 72 is equipped with an elastic buffer pad. When the cylinder pushes out, it presses and clamps the label stack in the new label box. The elastic buffer pad can adapt to the compression differences of different paper labels. The clamping force is adjusted by air pressure (0.3~0.6MPa). The cylinder body of the label-pushing cylinder 7 is equipped with an air source connector 73 for connecting to the air circuit.

[0065] The pull-wire servo motor 61 drives the winding wheel 62 after its speed is reduced and its torque increased by a reducer. The pull wire, pre-tensioned by the pull-wire spring box 64, passes through the guide mechanism and connects to the label sliding door. The pull-wire tension detector 63 monitors the tension and the position of the sliding door in real time. After the label-pushing cylinder 7 clamps the label, the pull-wire servo motor 61 operates in torque control mode, collecting motor current in real time to calculate torque. Through PID adjustment, the label tension is maintained within the range of 3-5N, automatically completing label overlap and follow-up wire release. When the label sliding door reaches the end of the label box, the pull-wire tension detector 63 triggers a signal, and the PLC control system 9 immediately starts the next label-changing process. The pull-wire spring box 64 provides a constant pre-tension force to prevent the pull wire from slackening.

[0066] Automatic label changing box lifting assembly 8: like Figure 10 As shown, the automatic label-changing box lifting assembly 8 supports the entire automatic label-changing box main frame 2, enabling precise adjustment of the overall height of the device. A lifting servo motor is fixed to the lifting base plate 83 and drives the lifting screw 81 to rotate. The lifting screw 81 converts the rotational motion into the vertical linear motion of the lifting base plate 83 via a nut pair. Symmetrically arranged lifting follower rods 82 on both sides ensure the smoothness and straightness of the lifting motion.

[0067] The translational mounting block 84 secures the lifting follower rod 82 with bolts, ensuring precise alignment with the labeling machine's mounting surface. The lifting range is 300mm, and the positioning accuracy is within 0.5mm. The HMI touchscreen 91 offers two operation modes: jogging (0.1mm increments) and distance preset (direct input of the target distance). It also supports setting the current position as the digital zero for repeated precise positioning, eliminating the need for manual measurement after a single model change calibration.

[0068] PLC control system 9 and label changing sequence: like Figure 1 , Figure 2 , Figure 15 As shown, the PLC control system 9 is the core of the entire device. The driver of the wire-pulling servo motor 61 implements torque closed-loop control: after comparing the set value with the real-time torque, the PID controller outputs a command, and at the same time, the encoder feeds back the speed information, forming a speed-torque dual-loop control to ensure stable label tension.

[0069] like Figure 11 , Figure 16As shown, the automatic label changing process is as follows: After the sensor detects a low scalar signal, the belt servo motor 31 drives the synchronous belt to move the empty box to the empty box compartment 42; the label protection cylinder 51 delays and pushes out the label protection plate 53 to protect the label at the working position; the belt servo motor 31 sends a new box to the working position; the label pushing cylinder 7 pushes out the label pushing rod 72 to clamp the label; the label protection cylinder 51 delays and retracts; the string pulling servo motor 61 completes the label overlap and releases the string in torque following mode. From sensor triggering to label changing completion, it takes about 12 seconds, of which the label protection cylinder 51 has an extension delay of about 500ms and a retraction delay of about 1000ms. The timing error of each step is less than 50ms, which is precisely controlled by the high-speed pulse output module of the PLC control system 9. The labeling machine runs continuously without stopping throughout the process.

[0070] The PLC control system 9 also includes bottle-stopping interlock logic: when all the label boxes in the label storage area are used up and there are not enough labels at the working position, a bottle-stopping signal is output to the labeling machine and an audible and visual alarm is triggered to prevent unlabeled products from flowing out. All alarm events are recorded in the log of the HMI touch screen 91 for traceability and query.

[0071] The main technical parameters of this embodiment are shown in the table below:

[0072] The specific embodiments of the present invention have been described in detail above, but they are merely examples, and the present invention is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the present invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. A fully automatic intelligent label replacement table, comprising a cold glue labeling machine label table, wherein the cold glue labeling machine label table includes a label station connecting seat and a label box, the label box being placed on the label table surface, characterized in that, include: The labeling station connecting support (1) is provided with an adjusting foot (14) at its bottom, and the labeling station connecting support (1) is fixedly connected to the labeling station of the cold glue labeling machine; The main frame (2) of the automatic label changing box is a rigid frame formed by connecting the front longitudinal beam (21), the rear cross beam (22) and the upright (23) with high-strength bolts. The bottom of the main frame is fixed on the label station connecting support (1). The automatic label changing box platform assembly (3) includes a platform track plate (33) and a belt servo motor (31). The platform track plate (33) is fixed inside the main frame, and the belt servo motor (31) is installed on the top of the main frame and connected to the synchronous belt drive through a drive shaft. The label box assembly (4) is located in the box supply area at the rear end of the platform track plate (33), including an empty box compartment (42), which is located on one side of the box supply area; The label protector assembly (5) includes a label protector guide rail (52) and a label protector cylinder (51), wherein the label protector guide rail (52) is fixed on the main frame and the label protector cylinder (51) is mounted on the main frame; The supplementary marking motion device assembly (6) includes a wire-pulling servo motor (61) and a winding wheel (62). The wire-pulling servo motor (61) is connected to the main frame, and the winding wheel (62) is connected to the output shaft of the wire-pulling servo motor (61). The pusher cylinder (7) is connected to the main frame via a cylinder mounting plate (71), and the piston rod of the pusher cylinder (7) is connected to the pusher rod (72); The automatic label changing box lifting assembly (8) includes a lifting base plate (83), which supports the main frame. The automatic label changing box lifting assembly (8) is connected between the label station connecting support (1) and the main frame. Sensors are installed at both ends of the platform track plate (33) and are fixedly connected to the main frame; The PLC control system (9) is electrically connected to the belt servo motor (31), the wire pull servo motor (61), the label protection cylinder (51), the label pusher cylinder (7), the lifting servo motor, and the sensors.

2. The fully automatic intelligent label replacement station according to claim 1, characterized in that, A strong magnet (32) is embedded in the bottom of the label box. A metal protrusion is provided on the synchronous belt. The strong magnet (32) and the metal protrusion are magnetically attracted to each other. Two strong magnets (32) are symmetrically installed at the bottom of each label box.

3. The fully automatic intelligent label replacement station according to claim 1, characterized in that, The label protector assembly (5) also includes a label protector plate (53), a left mounting plate (54), a right mounting plate (55), and a cylinder connector (56). The left mounting plate (54) and the right mounting plate (55) are bolted to both sides of the main frame. The two ends of the label protector guide rail (52) are connected to the left mounting plate (54) and the right mounting plate (55) respectively. The piston rod of the label protector cylinder (51) is connected to the label protector plate (53) through the cylinder connector (56). The label protector plate (53) is slidably mounted on the label protector guide rail (52).

4. The fully automatic intelligent label replacement station according to claim 1, characterized in that, The label box assembly (4) also includes a spring spacer, a positioning cylinder, a box guide rail and an angle adjustment rod (43). The box guide rail is symmetrically arranged on both sides of the rear section of the platform track plate (33). The spring spacer is spaced between adjacent label boxes along the direction of the box guide rail. The positioning cylinder is installed at the end of the box guide rail. The empty box compartment (42) is located on one side of the label box assembly (4). The angle adjustment rod (43) can adjust the angle of the empty box compartment (42).

5. The fully automatic intelligent label replacement station according to claim 1, characterized in that, The label moving device assembly (6) also includes a speed reducer, a pull wire, a label moving door, a pull wire tension detector (63), and a pull wire spring box (64). The speed reducer is connected between the pull wire servo motor (61) and the winding wheel (62). One end of the pull wire is wound on the winding wheel (62), and the other end is pre-tightened by the pull wire spring box (64) and passes through the guide mechanism to connect with the label moving door. The pull wire tension detector (63) is installed on the side of the movement path of the label moving door.

6. The fully automatic intelligent label replacement station according to claim 1, characterized in that, The cylinder mounting plate (71) is positioned and connected to the main frame by a positioning pin. An elastic buffer pad is installed at the front end of the push rod (72). An air source connector (73) is provided on the cylinder body of the push cylinder (7).

7. The fully automatic intelligent label replacement station according to claim 1, characterized in that, The automatic label changing box lifting assembly (8) also includes a lifting screw (81), a lifting follower rod (82), and a translation mounting block (84). The lifting servo motor is fixed on the lifting base plate (83) and is connected to the lifting screw (81) for transmission. The lifting screw (81) is engaged with the lifting base plate (83) through a nut pair. The lifting follower rod (82) is symmetrically arranged on both sides of the lifting screw (81). The upper end is fixedly connected to the main frame, and the lower end is slidably engaged with the lifting base plate (83) through the translation mounting block (84).

8. The fully automatic intelligent label replacement station according to claim 1, characterized in that, The marker station connecting support (1) is equipped with a rotary cylinder (11) and a joint bearing assembly (12). The rotary cylinder (11) is connected to the support body of the marker station connecting support (1) at an adjustable angle through the joint bearing assembly (12). A guide copper sleeve is fixed at the bottom of the marker station connecting support (1). An oil-impregnated bearing is press-fitted inside the guide copper sleeve. The oil-impregnated bearing is slidably engaged with the sliding shaft (13). The lifting guide rod (15) is vertically installed on the support body.

9. A fully automatic intelligent label replacement station according to claim 1, characterized in that, The left side panel of the main frame is equipped with an HMI touch screen (91), which is connected to the PLC control system (9). A pneumatic control valve group (92) is fixed at the lower front of the main frame. The air inlet of the pneumatic control valve group (92) is connected to an external air source through an air pipe, and the air outlet is connected to the air inlet of the label protection cylinder (51), the label pushing cylinder (7), and the waiting cylinder, respectively.

10. A fully automatic intelligent label replacement station according to claim 1, characterized in that, The platform track plate (33) is also provided with a guide shaft and a limiting block. The guide shaft is arranged parallel to both sides of the synchronous belt along the label box conveying direction and is fixedly connected to the platform track plate (33). The limiting block is fixed at both ends of the platform track plate (33).

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