Non-setting adhesive labeling machine uninterrupted automatic label receiving device based on multi-cylinder linkage

Abstract

The invention relates to the technical field of labeling machines, in particular to a non-setting adhesive labeling machine uninterrupted automatic label receiving device based on multi-cylinder linkage, and provides the non-setting adhesive labeling machine uninterrupted automatic label receiving device based on multi-cylinder linkage aiming at the problem that an existing labeling device cannot achieve continuous production operation. A first label roll and a second label roll are arranged on the two sides of the upper end of the machine frame, a label belt sequentially penetrates through the automatic label receiving and changing device, the label feeding buffering device, the label feeding driving mechanism, the stripping device, the paper collecting buffering device and the bottom paper reversing device, and under the work of the automatic label receiving and changing device, the label belt can be automatically bonded. When the label feeding buffer device and the paper collecting buffer device work, the tension force of a label belt can be adjusted, and when the label belt moves into the stripping device, a label can be separated from the label belt; the labeling machine can automatically and reliably complete replacement of new and old label rolls in a completely non-stop state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of labeling machines, in particular to an uninterrupted automatic label splicing device for an adhesive labeling machine based on multi-cylinder linkage. BACKGROUND

[0002] An adhesive automatic labeling machine is a key equipment in modern packaging production lines and is widely used in product packaging labeling processes in many industries such as food, beverage, and pharmaceuticals. The core of the adhesive automatic labeling machine is to realize the continuous operation of label separation from the backing paper, precise labeling, and backing paper recycling through traction, peeling, labeling, and paper collection mechanisms.

[0003] Currently, most automatic labeling machines on the market use a single roll label supply mode, which means that only one roll of label tape can be installed at a time. When the label is used up, the device needs to be stopped or an alarm is triggered, and the operator manually completes the stop, disassembly, new installation, manual label threading, debugging, and restart of the labeling process.

[0004] This traditional method has obvious defects: first, the stop and label replacement disrupt the continuity of production, significantly reducing the efficiency and capacity of high-speed production lines; second, label replacement relies on skilled operators, which is high in labor cost and low in automation, and cannot meet the demand for 24-hour continuous production; third, manual operation is prone to errors, increasing the risk of labeling quality and material waste; fourth, it does not meet the demand for full-process automation in industrial 4.0 and black factory, becoming a bottleneck in production automation.

[0005] To solve the above problems, the industry has proposed two improvement schemes: double label station switching and simple lap joint. However, both schemes have shortcomings: the double label station switching mechanism is complex and costly, and does not solve the problem of coordinated buffering between the paper collection side and the label feeding side, which can easily lead to label replacement failure; the simple lap joint relies on manual operation, has poor joint quality, and is prone to belt jamming and breakage, making it impossible to achieve true automation.

[0006] The core shortcoming of existing technology is the lack of reliability and high cost of automatic joint on the label feeding side, and the coordinated buffering control between label feeding and paper collection is generally ignored, making it impossible to achieve true uninterrupted labeling. Therefore, there is an urgent need for an uninterrupted automatic label splicing device that is compact in structure, reliable in joint, and can coordinate the control of label feeding and paper collection to solve the pain points of existing technology. SUMMARY

[0007] To solve the problem of continuous production of existing labeling devices, the present application provides an uninterrupted automatic label splicing device for an adhesive labeling machine based on multi-cylinder linkage, which can automatically and reliably complete the replacement of new and old label rolls without stopping the labeling machine, effectively solving the problems mentioned in the background technology.

[0008] To solve the above problems, the technical solution adopted by the present application is:

[0009] The application discloses a multi-cylinder linkage-based uninterrupted automatic label receiving device of an adhesive label marking machine. The automatic label receiving device comprises a rack, first and second label rolls arranged at the two sides of the upper end of the rack, label bands sleeved on the outer surfaces of the first and second label rolls, an automatic label receiving device, a label feeding buffer device, a label feeding driving mechanism, a peeling device, a paper collecting buffer device and a bottom paper reversing device arranged on the upper end of the rack, and the label bands sequentially pass through the automatic label receiving device, the label feeding buffer device, the label feeding driving mechanism, the peeling device, the paper collecting buffer device and the bottom paper reversing device.

[0010] The automatic label receiving device comprises a left half part mechanism and a right half part mechanism.

[0011] The first label clamping mechanism comprises a label clamping support seat, a label clamping cylinder, a movable clamping plate and a fixed clamping plate.

[0012] The push plate mechanism comprises a push plate cylinder.

[0013] The first translation mechanism comprises a translation cylinder and a translation fixed seat.

[0014] The first label pressing mechanism comprises a first label pressing cylinder, and the extension end of the first label pressing cylinder is provided with a label pressing push plate.

[0015] The cutting mechanism comprises a cutting cylinder.

[0016] The label feeding buffer device comprises a fixed guide assembly and a movable buffer assembly.

[0017] The machine frame is also provided with a bottom paper collecting device on one side, which comprises a support frame, a gravity tensioning assembly is arranged on one side of the support frame, and a driven collecting assembly is arranged on the other side of the support frame.

[0018] A fixed roller assembly is further arranged on the support frame, the fixed roller assembly comprises a plurality of fixed roller cylinders rotationally connected with the support frame; the gravity tensioning assembly comprises a sliding guide groove, and a movable roller assembly is slidably connected to the inner wall of the sliding guide groove; the driven collecting assembly comprises a paper collecting motor fixedly connected with the support frame, and a paper collecting shaft is arranged at the output end of the paper collecting motor; the bottom paper is firstly wound through the fixed roller assembly, changes direction and passes through the gravity tensioning assembly in an S-shaped multiple winding manner, and finally the tail end of the bottom paper is fixed on the paper collecting shaft; in the process that the paper collecting motor drives the paper collecting shaft to wind the bottom paper, the bottom paper will pull the movable roller assembly to move upward along the sliding guide groove against the gravity of the movable roller assembly.

[0019] Compared with the prior art, the present application has the following advantages:

[0020] 1. Real high reliability and full-automatic uninterrupted label connection are realized, and the production efficiency is greatly improved

[0021] The present application comprises a left-right symmetrical label clamping, translation, label pressing and cutting mechanism, and a closed-loop automatic label connection workstation is constructed, when label replacement is needed, the whole process of pressing, cutting, translation alignment, pushing and sticking, and resetting is automatically executed by the cylinder according to the preset program, no manual intervention is needed in the whole process, and the label sticking host does not need to stop, which completely eliminates the production line interruption caused by the traditional label replacement method, and the label replacement time is compressed from several minutes to several seconds, the comprehensive utilization rate and overall production efficiency of the equipment are significantly improved, and the present application is especially suitable for high-speed continuous production lines.

[0022] 2. The rigidity linkage and accurate alignment of multiple cylinders ensure high consistency and stability of the connection quality

[0023] The core advantage of the present application lies in the certainty of mechanical action:

[0024] Rigid clamping and pressing: independent label clamping cylinders and label pressing cylinders are used to independently and firmly fix the new and old label bands, thereby providing a stable basis for subsequent operations and avoiding band sliding;

[0025] Precise alignment: through the synchronous contraction movement of the two translation cylinders, the millimeter-level precision alignment of the cut-off tail of the old label band and the head of the new label band with adhesive on the axis of the push plate mechanism can be ensured, and the mechanical alignment method has higher reliability than pure visual guidance or manual alignment;

[0026] Controllable pressing: the push plate cylinder completes the pressing of the adhesive tape with constant force and stroke, thereby ensuring the consistency of the adhesive strength and flatness of each connection;

[0027] The above features make the success rate of each joint close to 100%, and the joint is firm and flat, which can smoothly pass through the peeling plate and detection sensor of the labeling machine, and eliminates quality accidents such as jamming, broken tape or skewed labeling caused by poor joint.

[0028] 3. Modularization and symmetrical design of structure, which gives the device excellent compatibility and maintainability

[0029] Symmetrical compatibility: the left and right parts of the mechanism are basically symmetrical, so that the device can equally process label tape from two directions, the logic is clear, easy to control and debug;

[0030] Modular design: the label clamping, translation, label pressing and label cutting functions are realized by independent cylinder modules, and are connected by standard bolts; when a functional module fails, it can be quickly and independently disassembled and replaced without the need for major repairs, greatly reducing the difficulty of maintenance and shortening the downtime for repair;

[0031] Space efficiency: although the functions are complete, all the cylinders are integrated in a compact work station space through clever layout, and the overall device structure is compact, which facilitates integration as a standard module into existing labeling machines of different models, and has strong flexibility and low cost for implementation of modification.

[0032] 4. Adopting a full pneumatic solution, achieving a perfect balance between high performance and low cost

[0033] The invention discards the high-cost servo motor, ball screw or robot driving scheme, and all uses standard industrial cylinders as the execution element, the pneumatic system has the natural advantages of low cost, mature technology, strong overload capacity and simple maintenance, through the simple on-off time sequence control of multiple solenoid valves by the programmable controller, the complex coordinated action can be realized, which makes the device have similar functions to high-end mechatronic systems while reducing the manufacturing cost by about 50%, and has an overwhelming advantage in long-term use and maintenance cost, providing an automatic upgrade solution with high cost performance for the market.

[0034] 5. Action logic interlocking and sequence control, ensuring high safety and stability of the device operation

[0035] The entire label receiving process is designed as a series of strictly sequentially executed mechanical actions, and is hard interlocked by the PLC program; for example, only after the label pressing mechanism confirms that the label is pressed, the label cutting mechanism is allowed to act; only after the two side translation mechanisms are retracted in place, the push plate mechanism is allowed to push out, this kind of "sequential triggering, conditional interlocking" control logic prevents misoperation or action disorder from the root, and ensures that the device can operate stably, safely and reliably for a long time even in complex industrial site environment. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 This is a schematic diagram of the main structure of the uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage of the present invention.

[0037] Figure 2 This is a schematic diagram of the label feeding buffer device of the uninterrupted automatic label receiving device for self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0038] Figure 3 This is a schematic diagram of the automatic label receiving and changing device of the self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0039] Figure 4 This is a schematic diagram of the label clamping mechanism of the uninterrupted automatic label receiving device for self-adhesive labeling machines based on multi-cylinder linkage of the present invention.

[0040] Figure 5 This is a schematic diagram of the push plate mechanism of the uninterrupted automatic label receiving device for self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0041] Figure 6 This is a schematic diagram of the translation mechanism of the uninterrupted automatic labeling device for self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0042] Figure 7 This is a schematic diagram of the first label pressing mechanism of the uninterrupted automatic label receiving device for self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0043] Figure 8 This is a schematic diagram of the label cutting mechanism of the uninterrupted automatic label receiving device for self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0044] Figure 9 This is a schematic diagram of the second label pressing mechanism of the uninterrupted automatic label receiving device for self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0045] Figure 10 Figure I illustrates the action of changing the left label in the uninterrupted automatic label receiving device for self-adhesive labeling machines based on multi-cylinder linkage of the present invention.

[0046] Figure 11 Figure II shows the action of changing the left label in the uninterrupted automatic label receiving device of the self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0047] Figure 12 Figure III shows the action of changing the left label in the uninterrupted automatic label receiving device of the self-adhesive labeling machine based on multi-cylinder linkage of the present invention.

[0048] Figure 13 This is a schematic diagram of the bottom paper collection device of the self-adhesive labeling machine continuous automatic label receiving device based on multi-cylinder linkage of the present invention.

[0049] Figure 14 This is a schematic diagram of the active collection component of the uninterrupted automatic label receiving device for self-adhesive labeling machines based on multi-cylinder linkage according to the present invention.

[0050] The diagram shows the following components: 1-Automatic label receiving and changing device, 2-First label roll, 3-Second label roll, 4-Label feeding buffer device, 5-Paper receiving buffer device, 6-Peeling device, 7-Bottom paper reversing device, 8-Inlet guide roller, 9-First stationary roller, 10-Second stationary roller, 11-Moving roller cylinder, 12-Moving roller guide rod, 13-Moving roller slide, 14-First moving roller, 15-Second moving roller, 16-First label clamping mechanism, 17-Second label clamping mechanism, 18-Push plate mechanism, 19-First translation mechanism, 20-Second translation mechanism, 21-Label cutting mechanism, 22-Second label pressing mechanism. Mechanism, 23-First label pressing mechanism, 24-Label clamping support seat, 25-Label clamping cylinder, 26-Fixed clamping plate, 27-Modible clamping plate, 28-Push plate cylinder, 29-Push head, 30-Translation cylinder, 31-Translation fixed seat, 32-First label pressing cylinder, 33-Label pressing push plate, 34-Cut-off knife, 35-Label cutting cylinder, 36-Frame, 37-Sensor, 38-Label feeding drive mechanism, 39-Second label pressing cylinder, 40-Label pressing plate, 41-Fixed roller, 42-Sliding guide groove, 43-Modible roller, 44-Paper delivery motor, 45-Paper delivery shaft, 46-Support frame. Detailed Implementation

[0051] The following are specific embodiments of the present invention, and the technical solutions of the present invention will be further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0052] like Figures 1-14 As shown, this invention provides an uninterrupted automatic labeling device for a self-adhesive labeling machine based on multi-cylinder linkage. It includes a frame 36, with a first label roll 2 and a second label roll 3 on both sides of the upper end of the frame 36. Label tape is fitted onto the outer surfaces of both the first label roll 2 and the second label roll 3. The upper end of the frame 36 also includes an automatic label-changing device 1, a label feeding buffer device 4, a label feeding drive mechanism 38, a peeling device 6, a paper receiving buffer device 5, and a bottom paper reversing device 7. The label tape passes sequentially through the automatic label-changing device 1, the label feeding buffer device 4, the label feeding drive mechanism 38, the peeling device 6, the paper receiving buffer device 5, and the bottom paper reversing device 7. When the first label roll 2 or the second label roll 3 needs to be replaced, the automatic label-changing device 1 automatically adheres the label tape. When the label feeding buffer device 4 and the paper receiving buffer device 5 are working, the tension of the label tape can be adjusted. When the label tape moves into the peeling device 6, the label can detach from the label tape.

[0053] like Figures 1-3 As shown, a sensor 37 is installed at the upper end of the frame 36. The sensor 37 can detect the usage status of the label roll; the winding direction of the label tape is as follows.Figure 1 As shown in the figure, the arrow direction indicates the winding direction of the label tape; the label feeding drive mechanism 38 is used to drive the label tape to move, and the bottom paper reversing device 7 is located downstream of the paper receiving buffer device 5 to change the conveying direction of the bottom paper; the end of the label tape is connected to the bottom paper collecting device, which can pull and collect the detached label bottom paper when the bottom paper collecting device is working; during normal operation, the label tape of the currently used label roll is drawn out from the first label roll 2 or the second label roll 3 and enters the automatic label receiving and changing device 1. When the sensor 37 detects that the current label roll is about to run out, the automatic label receiving and changing device 1 starts the working process: the label tape in use is cut from the gap between two labels, and the end of the spare label roll is glued to the end of the cut label tape with tape, thereby realizing uninterrupted automatic label receiving; after the label receiving is completed, the label tape passes through the label feeding buffer device 4 and the label feeding drive device in sequence, wherein the label feeding buffer device 4, the label feeding buffer device 5, the label feeding buffer device 6, the label feeding buffer device 7 ... The buffer device 4, through the controlled movement of its moving roller group, absorbs and compensates for tension fluctuations on the label feeding path during the engagement action of the automatic label receiving and changing device 1, maintaining a constant label feeding tension and preventing the label tape from loosening or breaking. After the label tape enters the label feeding drive mechanism 38, the motor-driven active rubber roller works in conjunction with the label inlet and outlet pressure rollers to achieve precise traction and conveying of the label tape. The label tape then passes around the peeling plate blade of the peeling device 6, separating the label from the backing paper. The label feeding drive mechanism 38 and the peeling device 6 are both existing technologies and will not be described in detail. The peeled backing paper enters the paper receiving buffer device 5. This device, also through the movement of the moving roller group, independently buffers the tension fluctuations on the paper receiving side when the automatic label receiving and changing action occurs, ensuring the continuity of backing paper recycling and avoiding backing paper breakage or accumulation due to sudden tension changes. The buffered backing paper is guided to the backing paper collection device for final winding and recycling.

[0054] The automatic label receiving and changing device 1 includes a left half mechanism and a right half mechanism. The left half mechanism is provided with a first label clamping mechanism 16, a push plate mechanism 18, a first translation mechanism 19 and a first label pressing mechanism 23 arranged sequentially along the label direction. The right half mechanism includes a second label clamping mechanism 17, a second translation mechanism 20, a label cutting mechanism 21 and a second label pressing mechanism 22.

[0055] like Figure 3 As shown, both the left and right halves of the mechanism are fixed on the frame 36. The automatic label changing device 1 consists of two symmetrically arranged and functionally coordinated mechanisms. Through precise timing control of multiple cylinders, it completes the entire process of clamping, positioning, pressing, cutting, and joining new and old label tapes. Through the set label clamping mechanism, push plate mechanism 18, label cutting mechanism 21, translation mechanism, and label pressing mechanism, it can realize the work of clamping, positioning, pressing, cutting, and joining new and old label tapes.

[0056] The first label clamping mechanism 16 includes a label clamping support 24, a label clamping cylinder 25, a movable clamping plate 27, and a fixed clamping plate 26. The label clamping support 24 is fixed to the frame 36. The movable clamping plate 27 is fixed to the piston rod of the label clamping cylinder 25 and can open and close as the piston rod extends and retracts.

[0057] like Figure 4 As shown, the second label clamping mechanism 17 has the same structure as the first label clamping mechanism 16. Taking the first label clamping mechanism 16 as an example, the first label clamping mechanism 16 is used to clamp the end of the old label tape from the first label roll 2; the second label clamping mechanism 17 is used to clamp the beginning of the new label tape from the second label roll 3, and the beginning of the new label tape has a piece of adhesive tape pre-attached to it.

[0058] The push plate mechanism 18 includes a push plate cylinder 28, and the telescopic end of the push plate cylinder 28 is provided with a push head 29.

[0059] like Figure 5 As shown, the push plate mechanism 18 is used to push and press the tape at the front end of the new label tape onto the old label tape during bonding. Its structure consists of a push plate cylinder 28 and a push head 29 fixed to the end of its piston rod.

[0060] The first translation mechanism 19 includes a translation cylinder 30 and a translation fixation, and the translation fixation seat 31 is fixedly connected to the piston rod of the translation cylinder 30.

[0061] like Figure 6 As shown, the first translation mechanism 19 is used to drive the first pressure mark mechanism 23 on it to move laterally, and the second translation mechanism 20 has the same structure as the first translation mechanism 19. The second translation mechanism 20 is used to drive the second pressure mark mechanism 22 on it to move laterally.

[0062] The first label pressing mechanism 23 includes a first label pressing cylinder 32, and the telescopic end of the first label pressing cylinder 32 is provided with a label pressing push plate 33. The second label pressing mechanism 22 includes a second label pressing cylinder 39, and the telescopic end of the second label pressing cylinder 39 is provided with a label pressing plate 40.

[0063] like Figure 7 As shown, the first label pressing mechanism 23 is fixedly installed on the corresponding translational fixing seat 31 and can move together with it; it is used to press the old label tape before cutting; the mechanism consists of a first label pressing cylinder 32 and a label pressing push plate 33 fixed to the end of its piston rod; as shown Figure 9 As shown, the second pressure mark mechanism 22 is fixedly installed on the corresponding translational fixed base 31. It consists of a second pressure mark cylinder 39 and a pressure mark plate 40 fixed to the end of its piston rod. The pressure mark plate 40 serves as a pressure-bearing platform during engagement.

[0064] The label cutting mechanism 21 includes a label cutting cylinder 35, and the telescopic end of the label cutting cylinder 35 is provided with a cutting blade 34.

[0065] like Figure 8 As shown, the label cutting mechanism 21 is fixedly installed on the label pressing plate 40 and moves with it; this mechanism is used to cut off the waste end of the old label tape, and consists of a label cutting cylinder 35 and a cutting blade 34 fixed on its piston rod; label path: the first label roll 2 is led out from the label roll, passes around the guide roller in sequence, enters the working area below the label cutting mechanism 21, and then continues to supply labels to the labeling machine host; the second label roll 3 new label tape follows the same path.

[0066] Its main workflow and collaborative actions among various organizations, taking the replacement of the left-side label as an example:

[0067] like Figures 10-12 As shown, the initial state of the device, i.e., the normal labeling stage, is as follows:

[0068] The label clamping cylinder 25 of the first label clamping mechanism 16 is in the extended state, releasing the old label tape;

[0069] The label clamping cylinder 25 of the second label clamping mechanism 17 is in the retracted state, clamping the new label tape;

[0070] The push plate mechanism 18, the first label pressing mechanism 23, the second label pressing mechanism 22, and the label cutting mechanism 21 are all in a retracted state;

[0071] Both the first translation mechanism 19 and the second translation mechanism 20 are in the extended state, causing the working end faces of the left and right parts of the mechanism to separate.

[0072] When the left-side old label roll is detected to be running out and automatic label transfer is required, the control unit triggers the cylinders in the following sequence:

[0073] Pressing and positioning: The clamping cylinder 25 of the first clamping mechanism 16 retracts, and at the same time the pressing cylinder of the first pressing mechanism 23 is activated, and its pressing plate 33 is pushed out to the right, firmly pressing the old label tape on the left end onto the pressing plate 40 of the second pressing mechanism 22 on the right, forming a stable jointing position.

[0074] Cutting the old tape: The label cutting cylinder 35 of the label cutting mechanism 21 is activated, driving the cutting knife 34 to move to the left, cutting the old label tape pressed on the label pressing plate 40. After cutting is completed, the label cutting cylinder 35 retracts and the cutting knife 34 resets.

[0075] Translational alignment: The translation cylinders 30 of the first translation mechanism 19 and the second translation mechanism 20 retract synchronously, respectively driving the first label pressing mechanism 23, the old label tape end pressed by it, and the second label pressing mechanism 22 to move towards the middle, until the old label tape end and the tape area at the front end of the new label tape are precisely aligned in front of the pusher 29 of the pusher mechanism 18.

[0076] Execution of engagement: The pusher cylinder 28 of the pusher mechanism 18 is activated, driving the pusher head 29 to push forward horizontally, precisely pressing and adhering the pre-placed adhesive tape at the front end of the new label tape on the right side to the broken end of the old label tape.

[0077] Reset and Switching: After the engagement is completed, the push plate mechanism 18 retracts; the first label pressing mechanism 23 retracts and releases the old label tape; the first label clamping mechanism 16 releases; at the same time, the label clamping cylinder 25 of the second label clamping mechanism 17 extends and clamps the new label tape; subsequently, the first translation mechanism 19 and the second translation mechanism 20 extend and reset again, and the main drive of the labeling machine begins to pull the new label tape, completing the entire uninterrupted automatic labeling process, and production can proceed continuously.

[0078] The label feeding buffer device 4 includes a fixed guide assembly and a movable buffer assembly. The fixed guide assembly includes an inlet guide roller 8 and two stationary rollers, both of which are mounted on the frame 36. The movable buffer assembly includes a set of moving rollers and a moving roller guide rod 12 fixedly connected to the frame 36. A moving roller slide 13 is slidably connected to the outer surface of the moving roller guide rod 12. The moving roller set is mounted on the moving roller slide 13. The movable buffer assembly also includes a moving roller cylinder 11 fixedly connected to the frame 36. The moving roller slide 13 is mounted on the telescopic end of the moving roller cylinder 11.

[0079] like Figure 2 As shown, the label feeding buffer device 4 and the paper receiving buffer device are basically the same in mechanical structure. They are respectively arranged between the automatic label receiving device and the label feeding drive device in the label feeding path and between the paper receiving path peeling device 6 and the bottom paper reversing device 7 in the paper receiving path. They are used to independently absorb tension fluctuations on their respective paths and achieve constant tension control. The core structure of the two buffer devices is the same. The label feeding buffer device 4 is used as an example for explanation. The stationary rollers include the first stationary roller 9 and the second stationary roller 10. The label tape is introduced from the inlet guide roller 8 and passes around each stationary roller according to a predetermined path. Through the set moving roller guide rod 12 and moving roller slide 13, the moving roller group can be limited to move left and right in a specified direction. The moving roller group includes the first moving roller 14 and the second moving roller 15. When the moving roller cylinder 11 works, it can adjust the position of the moving roller group, thereby adjusting the tension of the label tape. The moving roller cylinder 11 is supplied with and maintained with a constant preset air pressure, so that its piston rod generates a constant thrust in the buffer direction, which is usually the contraction direction.

[0080] Working principle:

[0081] The label tape travels in an “S” or “Ω” shaped path, alternately around a fixed stationary roller and a moving roller mounted on a moving roller slide 13;

[0082] Under normal tension balance: When the system's label feeding or paper receiving force is stable, the tension applied by the label tape to the moving roller assembly is balanced with the constant thrust of the moving roller cylinder 11, the moving roller slide 13 remains stationary, and the tape path length is fixed;

[0083] During the buffering process, when tension fluctuates: when an automatic label receiving action or other disturbance occurs upstream, causing a sudden increase in the label tape tension, the increased tension will overcome the constant thrust of the cylinder, pushing the moving roller slide along the moving roller guide rod 12 towards the contraction direction of the moving roller cylinder 11; this movement immediately releases part of the label tape length wound on the moving roller, which is equivalent to providing the system with a "flexible storage" tape length, thereby quickly absorbing and offsetting the tension spike, and avoiding the tension directly impacting the downstream precision drive or peeling mechanism; conversely, when the tension decreases, the constant thrust of the cylinder will push the slide to move in the opposite direction, tightening the tape path and maintaining tension stability;

[0084] Core advantages:

[0085] Active constant tension control: By using the constant back pressure of the cylinder, an adjustable and stable reference tension is set for the system, making the buffer action smooth and the response rapid.

[0086] Two-way isolation protection: The label feeding buffer device 4 effectively isolates the tension impact caused by the automatic label receiving action on the label feeding drive device and the peeling process; the paper receiving buffer device 5 isolates the impact of the peeling point tension change on the bottom paper recycling system; this dual-sided independent buffer design is the key to ensuring that the entire automatic label receiving process is stable, reliable and does not affect the labeling quality.

[0087] Simple and reliable structure: The whole set of equipment consists of standard guide rails, rollers and cylinders, without complex sensors or closed-loop servo control, low cost, high reliability and easy maintenance.

[0088] The frame 36 is also provided with a bottom paper collection device on one side. The bottom paper collection device includes a support frame 46. A gravity tensioning component is provided on one side of the support frame 46, and an active collection component is provided on the other side of the support frame 46.

[0089] like Figures 13-14 As shown, the bottom paper collection device is set independently of the main station frame 36 and is used to finally wind and collect the bottom paper after it has been peeled off and guided by the bottom paper reversing device 7. The device ensures the smooth and efficient recycling of the bottom paper by combining gravity tension and active winding.

[0090] The support frame 46 is also equipped with a fixed roller assembly, which includes multiple fixed rollers 41 rotatably connected to the support frame 46; the gravity tensioning assembly includes a sliding guide groove 42, and a moving roller assembly is slidably connected to the inner wall of the sliding guide groove 42; the active collection assembly includes a take-up motor 44 fixedly connected to the support frame 46, and a take-up shaft 45 is provided at the output end of the take-up motor 44; the bottom paper first passes around the fixed roller assembly, changes direction and passes through the gravity tensioning assembly in an S-shaped manner multiple times, and finally the end of the bottom paper is fixed on the take-up shaft 45; during the process of the take-up motor 44 driving the take-up shaft 45 to wind the bottom paper, the bottom paper will pull the moving roller assembly to resist its gravity and move upward along the sliding guide groove 42.

[0091] like Figures 13-14 As shown, the fixed roller assembly is fixedly installed on the support frame 46 of the bottom paper collection device, serving as a fixed guide fulcrum for the bottom paper entering the device; the gravity tensioning assembly provides stable tension before the bottom paper enters the take-up shaft 45; the sliding guide groove 42 is fixed vertically or inclinedly on the frame 36; the moving roller assembly includes multiple moving rollers 43, which are roller groups composed of multiple parallel rollers, with both ends installed in the sliding guide groove 42 and able to slide freely up and down along the guide groove; the moving roller assembly maintains a downward trend in the guide groove by its own weight; the take-up shaft 45 is rotatably supported on the device support frame 46. 6. The paper take-up motor 44 is fixedly mounted on the support frame 46. Its output end is connected to the paper take-up shaft 45 through a transmission mechanism such as a coupling, belt or gear, and drives it to rotate. After the paper take-up is led out from the paper take-up reversing device 7, its travel path is as follows: First, it passes around the fixed roller assembly, changes direction and enters the gravity tensioning area. Then, it passes through the gravity tensioning assembly in an S-shape or multiple passes. The paper takes-up alternately around the fixed roller 41 or other fixed points on the device frame and the sliding moving roller assembly. Finally, the end of the paper is fixed on the paper take-up shaft 45.

[0092] Gravity constant tension principle: During the process of the take-up motor 44 driving the take-up shaft 45 to wind the bottom paper, the bottom paper will pull the moving roller assembly against its gravity to move upward along the sliding guide groove 42. The gravity of the moving roller assembly provides a constant and adjustable tension force. This force is transmitted through the bottom paper, so that the entire take-up path always maintains a stable and appropriate tension during the winding process, effectively avoiding the loosening, wrinkling or breakage of the bottom paper due to the instantaneous mismatch between the winding speed and the incoming material speed.

[0093] Large-capacity independent collection: As an independent module, this device can be designed to accommodate large-diameter bottom paper rolls. Its layout is independent of the main label station, avoiding the adverse effects of heavy large rolls of bottom paper on the structural rigidity and movement stability of the main label frame, and optimizing the overall mechanical performance of the machine.

[0094] System decoupling and reliability: As a passive mechanical buffer, the gravity tensioning component can automatically absorb the slight speed difference between the upstream and winding actions, which simplifies the control system of the paper take-up motor 44 and improves the operational stability and reliability of the entire recycling system.

[0095] In use, the label tape of the currently used label roll is drawn from the first label roll 2 or the second label roll 3 and enters the automatic label-switching device 1. When the sensor 37 detects that the current label roll is about to run out, the automatic label-switching device 1 starts its workflow: cutting the label tape in use at the gap between two labels, and using adhesive tape to attach the end of the spare label roll to the end of the cut label tape, thereby achieving uninterrupted automatic label-switching. After label-switching is completed, the label tape passes sequentially through the label-feeding buffer device 4 and the label-feeding drive device. The label-feeding buffer device 4, through the controlled movement of its moving roller group, absorbs and compensates for tension fluctuations on the label-feeding path during the joining action of the automatic label-switching device 1, maintaining a constant tension. The label feeding tension is controlled to prevent the label tape from loosening or breaking. After the label tape enters the label feeding drive mechanism 38, the active rubber roller driven by the motor works in conjunction with the label inlet and outlet pressure rollers to achieve precise traction and conveying of the label tape. The label tape then passes around the peeling plate blade of the peeling device 6 to separate the label from the backing paper. Both the label feeding drive mechanism 38 and the peeling device 6 are existing technologies and will not be described in detail. The peeled backing paper enters the paper receiving buffer device 5. This device, through the movement of the moving roller group, independently buffers the tension fluctuations on the paper receiving side when the automatic label receiving action occurs, ensuring the continuity of backing paper recycling and avoiding backing paper breakage or accumulation due to sudden tension changes. The buffered backing paper is guided to the backing paper collection device for final winding and recycling.

Claims

1. A continuous automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage, comprising a frame (36), characterized in that: The upper end of the frame (36) is provided with a first label roll (2) and a second label roll (3). The outer surfaces of the first label roll (2) and the second label roll (3) are covered with label tape. The upper end of the frame (36) is also provided with an automatic label replacement device (1), a label feeding buffer device (4), a label feeding drive mechanism (38), a peeling device (6), a paper receiving buffer device (5), and a bottom paper reversing device (7). The label tape passes through the automatic label replacement device (1), the label feeding buffer device (4), the label feeding drive mechanism (38), the peeling device (6), the paper receiving buffer device (5), and the bottom paper reversing device (7) in sequence. When it is necessary to replace the first label roll (2) or the second label roll (3), the label tape can be automatically glued under the operation of the automatic label replacement device (1). When the label feeding buffer device (4) and the paper receiving buffer device (5) are working, the tension of the label tape can be adjusted. When the label tape moves into the peeling device (6), the label can be separated from the label tape.

2. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 1, characterized in that: The automatic label receiving and changing device (1) includes a left half mechanism and a right half mechanism. The left half mechanism is provided with a first label clamping mechanism (16), a push plate mechanism (18), a first translation mechanism (19) and a first label pressing mechanism (23) in sequence along the label direction. The right half mechanism includes a second label clamping mechanism (17), a second translation mechanism (20), a label cutting mechanism (21) and a second label pressing mechanism (22).

3. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 2, characterized in that: The first label clamping mechanism (16) includes a label clamping support (24), a label clamping cylinder (25), a movable clamping plate (27), and a fixed clamping plate (26). The label clamping support (24) is fixed to the frame (36), and the movable clamping plate (27) is fixed to the piston rod of the label clamping cylinder (25) and can open and close with the extension and retraction of the piston rod.

4. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 2, characterized in that: The push plate mechanism (18) includes a push plate cylinder (28), and the telescopic end of the push plate cylinder (28) is provided with a push head (29).

5. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 2, characterized in that: The first translation mechanism (19) includes a translation cylinder (30) and a translation fixation, and a translation fixation seat (31) is fixed to the piston rod of the translation cylinder (30).

6. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 2, characterized in that: The first label pressing mechanism (23) includes a first label pressing cylinder (32), and the telescopic end of the first label pressing cylinder (32) is provided with a label pressing push plate (33). The second label pressing mechanism (22) includes a second label pressing cylinder (39), and the telescopic end of the second label pressing cylinder (39) is provided with a label pressing plate (40).

7. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 2, characterized in that: The label cutting mechanism (21) includes a label cutting cylinder (35), and the telescopic end of the label cutting cylinder (35) is provided with a cutting blade (34).

8. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 1, characterized in that: The label feeding buffer device (4) includes a fixed guide assembly and a movable buffer assembly. The fixed guide assembly includes an inlet guide roller (8) and two stationary rollers. The fixed guide assembly is mounted on the frame (36). The movable buffer assembly includes a moving roller group and a moving roller guide rod (12) fixed to the frame (36). A moving roller slide (13) is slidably connected to the outer surface of the moving roller guide rod (12). The moving roller group is mounted on the moving roller slide (13). The movable buffer assembly also includes a moving roller cylinder (11) fixed to the frame (36). The moving roller slide (13) is mounted on the telescopic end of the moving roller cylinder (11).

9. The uninterrupted automatic labeling device for self-adhesive labeling machines based on multi-cylinder linkage as described in claim 1, characterized in that: The frame (36) is also provided with a bottom paper collection device on one side. The bottom paper collection device includes a support frame (46). A gravity tensioning component is provided on one side of the support frame (46), and an active collection component is provided on the other side of the support frame (46).

10. The uninterrupted automatic labeling device for a self-adhesive labeling machine based on multi-cylinder linkage as described in claim 9, characterized in that: The support frame (46) is also equipped with a fixed roller assembly, which includes multiple fixed rollers (41) rotatably connected to the support frame (46); the gravity tensioning assembly includes a sliding guide groove (42), and a moving roller assembly is slidably connected to the inner wall of the sliding guide groove (42); the active collection assembly includes a paper take-up motor (44) fixed to the support frame (46), and a paper take-up shaft (45) is provided at the output end of the paper take-up motor (44); the bottom paper first passes around the fixed roller assembly, changes direction and passes through the gravity tensioning assembly in an S-shaped manner multiple times, and finally the end of the bottom paper is fixed on the paper take-up shaft (45); during the process of the paper take-up motor (44) driving the paper take-up shaft (45) to wind the bottom paper, the bottom paper will pull the moving roller assembly to resist its gravity and move upward along the sliding guide groove (42).

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