Film feeding system based on double tension intervals and used for multi-column packaging machine

Abstract

The utility model discloses a double tension interval-based film feeding system for a multi-column packaging machine, which comprises a paper roll mechanism arranged at the bottom of a rack, and a paper film changing mechanism, a film feeding device, a swing shaft roller tensioning mechanism, a laser coding mechanism, a laser coding position adjusting mechanism and a damping mechanism are sequentially arranged at the downstream of the paper roll mechanism according to the film feeding direction, an encoder alarm device and a mark tracking photoelectric sensor mark position adjusting mechanism are further arranged on the machine frame. During working, the film feeding device pulls out a paper film from a paper film roll of the paper roll mechanism, and the brake shaft is braked by the brake block, so that the paper film forms a first tension interval between the paper roll mechanism and the film feeding device; the damping mechanism is located at the output end of the film feeding system, the paper film is wound in a swing tensioning roller shaft system of the swing shaft roller tensioning mechanism, and the swing tensioning roller shaft system droops under the action of gravity, so that the paper film forms a second tension interval between the film feeding device and the damping mechanism. The film feeding device can be matched with multiple rows of packaging machines, can continuously feed films, and is stable in tension.

Description

Technical Field

[0001] This utility model relates to a packaging machine, and more specifically to a film feeding system based on a dual tension range for a multi-row packaging machine used in the production of bagged food or pharmaceutical packaging machinery. Background Technology

[0002] In existing packaging production machinery, the servo motor driving the paper roll rotation in the film feeding system is directly connected to the air shaft after gear transmission. When the paper roll stops rotating, the motor also stops. This intermittent starting and stopping of the paper roll drive motor, due to various factors such as inertial buffering, paper film material and plastic deformation, and differences in paper film surface roughness and pretension, results in highly unstable tension in the paper feeding mechanism during actual use. This affects the flatness of the packaging bag, the smoothness of the mechanism's movement, and causes wrinkles, localized adhesion, and, when multiple rows of packaging bags are sealed simultaneously, the difference in tension inevitably leads to poor product consistency, inaccurate positioning, and pattern misalignment. Not only can the appearance quality be compromised, but in severe cases, serious quality problems such as leaks and damaged bags may occur. Simultaneously, the fluctuation in tension also causes displacement during operation. This paper film misalignment is a problem that must be solved in current packaging machinery. The paper film travels a long distance after passing through the rollers, and the processing difficulty and assembly precision of each component limit manufacturing costs. Improving accuracy to correct deviation would undoubtedly increase manufacturing expenses. Currently, most packaging machinery on the market corrects paper film deviation by adjusting the paper roll position. This method not only wastes a lot of packaging film but is also time-consuming and labor-intensive. Furthermore, changing or reconnecting paper film is complex, requiring resetting and adjusting system tension, coding positions, and photoelectric sensor positions, consuming excessive adjustment time and causing significant inconvenience to production and maintenance. With increasing market demand, requirements for equipment output and operational stability are gradually rising. Existing film feeding mechanisms can no longer meet the demands of high-speed, high-quality, and long-term stable packaging equipment. Increased packaging speed places higher demands on the film supply system. To ensure continuous operation, a film feeding system capable of continuous film supply and stable tension is essential to match the main machine. Utility Model Content

[0003] In view of the above-mentioned prior art, the present invention provides a film feeding system based on dual tension range for multi-row packaging machines. The film feeding system based on dual tension range can be adapted to multi-row packaging machines and can continuously supply film with stable tension.

[0004] To solve the above-mentioned technical problems, this utility model proposes a film feeding system based on dual tension range for multi-row packaging machines, including a paper rack mechanism. The paper rack mechanism includes a frame, and a paper roll mechanism is provided at the bottom of the frame. Downstream of the paper roll mechanism, in the direction of film feeding, a paper changing mechanism, a film feeding device, a swing roller tensioning mechanism, a laser marking mechanism, a laser marking position adjustment mechanism, and a damping mechanism are provided in sequence. The frame is also provided with an encoder alarm device and a tracking photoelectric sensor marking position adjustment mechanism.

[0005] The paper roll mechanism includes an air-expansion shaft installed at the bottom of the frame. Bearings are installed on both sides of the air-expansion shaft, which is supported on the paper rack side upright plate A and the paper rack side upright plate B. On the inner side of the paper rack side upright plate B, near the air-expansion shaft, a low-film alarm sensor is installed, and an empty-film alarm sensor is installed upstream of the low-film alarm sensor along the paper film direction. When the paper film wound on the air-expansion shaft is about to run out, the low-film alarm sensor emits a low-film alarm signal. When the paper film is exhausted, the empty-film alarm sensor emits an empty-film signal.

[0006] A paper-rolling brake device is installed at the bottom of the frame, on the left side of the paper roll mechanism. The paper-rolling brake device includes a manual valve, a brake cylinder, a brake shaft, a brake paper-rolling lever, and a brake block. One end of the brake cylinder is fixedly supported on the side upright plate A of the paper-rolling mechanism. The cylinder rod at the other end of the brake cylinder is connected to one end of the brake paper-rolling lever. The other end of the brake paper-rolling lever is connected to the brake block. The middle position of the brake paper-rolling lever is supported on the side upright plate A of the paper-rolling mechanism. The manual valve controls the extension and retraction of the cylinder rod of the brake cylinder. In the working state, the cylinder rod extends, and under the action of the brake paper-rolling lever, the brake block presses on the brake shaft, providing resistance to the brake shaft.

[0007] The film feeding device includes a film feeding motor, a film feeding roller A, and a film pressing roller A, with the paper film located between the film feeding roller A and the film pressing roller A;

[0008] The laser marking mechanism includes a laser marking device, a visual inspection device, and a visual position adjustment device. The laser marking device includes a laser baffle, a marking support roller, a marking support plate A, and a marking support plate B. The lower part of the marking support plate B is provided with a meter-counting wheel of the laser marking machine. The visual inspection device includes two visual support rollers and a camera support plate. A visual camera is mounted on the camera support plate. The visual position adjustment device includes a visual adjustment roller A and two visual adjustment rollers B. Visual adjustment gears are provided at both ends of the visual adjustment roller A. A visual adjustment rack that meshes with the visual adjustment gears is provided on the inner side of the marking support plate A.

[0009] The tracking photoelectric sensor position adjustment mechanism includes a Y-axis displacement control mechanism, an X-axis displacement control mechanism fixed on the Y-axis displacement control mechanism, and a tracking photoelectric sensor fixed on the X-axis displacement control mechanism. The tracking photoelectric sensor identifies the position of the paper film and provides positioning origin data for the film feeding operation of the packaging machine. Both the Y-axis displacement control mechanism and the X-axis displacement control mechanism have independent motors and are driven by their respective independent threaded pairs.

[0010] The laser marking position adjustment mechanism includes two fixed rollers and one movable roller mounted on the horizontal support. Gears are respectively provided at both ends of the movable roller. A rack that meshes with the gears is provided on the inner side of the horizontal support. A slot is provided on the horizontal support at a position corresponding to the two ends of the movable roller. Under the relative movement of the gear and rack pair, the two ends of the movable roller slide within the slot.

[0011] In operation, the film feeding device pulls the film out of the film roll of the paper roll mechanism. At this time, the brake shaft is braked by the brake block, thereby forming a first tension range between the film roll mechanism and the film feeding device. The damping mechanism is located at the output end of the film feeding system. The film is wound in the swing tension roller shaft system of the swing shaft roller tensioning mechanism. Under the action of gravity, the swing tension roller shaft system droops, thereby forming a second tension range between the film feeding device and the damping mechanism.

[0012] Furthermore, in the film delivery system of this utility model:

[0013] The frame includes a horizontal support and a vertical support. The horizontal support consists of a paper holder horizontal plate A and a paper holder horizontal plate B. The vertical support consists of a paper holder vertical plate A, a paper holder vertical plate B, a paper holder side vertical plate A, a paper holder side vertical plate B, and two paper holder support shafts. Two long paper holder shafts are arranged sequentially between the paper holder vertical plates A and B along the film feeding direction. An electric cylinder support seat and a correction electric cylinder are provided above the front of the vertical support. A film-attaching photoelectric sensor and a correction sensor are provided on the inner side of the paper holder horizontal plate A along the film feeding direction. A paper holder photoelectric sensor support shaft is provided on the inner side of the horizontal support. The film-attaching photoelectric sensor points towards the paper film and is used for film attachment detection. The film-attaching photoelectric sensor can be manually adjusted axially on the paper holder photoelectric sensor support shaft.

[0014] The film changing mechanism includes a film changing plate fixed to the bottom of the frame. Each of the upper and lower sides of the film changing plate has a pressure plate and a roller. Two pressure cylinders are fixed to the back of each end of the film changing plate. The cylinder rods of the two pressure cylinders extend through four through holes in the film changing plate, and the top ends of the cylinder rods are connected to the pressure plate. The film is supported by the two rollers and laid on the film changing plate, floating between the film changing plate and the pressure plate. When the cylinder rods of the pressure cylinders are retracted, the pressure plate presses the film tightly onto the film changing plate. A knife groove is provided in the middle of the film changing plate.

[0015] The swing roller tensioning mechanism includes a swing tensioning roller shaft system and a fixed support roller shaft system installed in the middle of the vertical support and arranged sequentially along the paper film direction; one end of the swing tensioning roller shaft system extends to the outside of the vertical support; the encoder alarm device includes a follower fixed to the outside of the vertical support, an encoder synchronization wheel, a sensor and an encoder; the follower moves with the swing tensioning roller shaft system; the encoder and the encoder synchronization wheel are linked by a synchronous belt.

[0016] The damping mechanism includes a magnetic powder brake, a film pressing roller B, a film feeding roller B, and a film pressing roller shaft distance adjustment mechanism. The pressure between the film pressing roller B and the film feeding roller B is adjusted and maintained by the film pressing roller shaft distance adjustment mechanism. The film pressing roller shaft distance adjustment mechanism includes an adjustment device with the same structure respectively set at both ends of the film pressing roller B. The adjustment device includes a lock nut adjustment block sleeved on the shaft end of the film pressing roller B. The lock nut adjustment block is provided with a compression spring screw. The compression spring screw is provided with a compression spring, a lock nut plate, and a hollow lock nut stud in sequence. The lock nut plate is fixed to the horizontal bracket. The compression spring screw passes through the hollow lock nut stud and is threadedly connected to the lock nut adjustment block. The depth of the hollow lock nut stud screw screw screw into the lock nut plate is adjusted by the compression spring between the lock nut adjustment block and the hollow lock nut stud, thereby adjusting the shaft distance between the film pressing roller B and the film feeding roller B, thus providing the tension of the paper film according to production needs.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] The film feeding system based on dual tension range proposed in this utility model for multi-row packaging machines can independently control the film tension in the entire film feeding system in two stages (the initial feeding stage and the film feeding process stage). In the initial feeding stage, the film feeding servo motor provides initial conveying power. Under the damping action of the paper roll brake device, the paper roll obtains stable and uniform tension in this stage, improving the flatness and stretchability of the paper roll. At the same time, the damping is adjustable, the servo motor load is uniform and is not affected by the size of the film roll, the motor output is stable, and the service life of the film feeding servo motor is increased. It also lays a good foundation for the subsequent film feeding stage. In the subsequent film feeding process stage, the swing arm of the swing roller moves within a small angle range, which is automatically adjusted and set according to the system operation. During the film feeding process, the motor speed is automatically matched with the paper feeding speed of the packaging machine during continuous operation. When the movement range is too large and exceeds the set value, the encoder feeds back a signal to the control system to realize automatic shutdown. At the same time, it also realizes the alarm for no film or abnormal film supply, thus realizing the tension in the film feeding process stage.

[0019] The paper feeder mechanism in this invention can automatically correct paper film deviation. After the sensor detects lateral displacement of the paper film (i.e., deviation), it feeds back a signal and controls the deviation adjustment motor to drive the mechanism, achieving rapid and automatic deviation correction for the entire paper feeding mechanism. The damping mechanism in this invention has a simple and compact structure and reliable operation. By adjusting the pressure generated by the spring between the hollow locking nut stud and the adjusting nut block, it achieves consistent pressure at both ends of the two rollers, preventing paper film displacement under force, ensuring stable paper film movement, and maintaining a smooth and wrinkle-free paper film surface. When changing paper film parts, debugging, or initial setting, it significantly reduces paper film waste and operation time, improving production efficiency while achieving high-precision quality assurance, greatly enhancing market demand.

[0020] The film feeding system based on dual tension range of this utility model has a reasonable structure, high cost performance, and is easy to install. When the main packaging machine is in continuous production, it can be adapted to the main machine to continuously supply film, dynamically code and detect, providing basic support for the packaging speed of high-speed continuous packaging machines. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the dual-tension film feeding system for multi-row packaging machines according to this utility model;

[0022] Figure 2-1 yes Figure 1 The figure shows a side view of the dual tension film feeding system, illustrating the working path of the paper film.

[0023] Figure 2-2 yes Figure 2-1 Partial view of section A shown;

[0024] Figure 2-3 yes Figure 2-1 Partial view of section B shown;

[0025] Figure 3 yes Figure 1 A partial schematic diagram of the paper rack mechanism shown in the figure;

[0026] Figure 4-1 yes Figure 1 A partial schematic diagram of the paper changing and paper feeding mechanism shown in the figure;

[0027] Figure 4-2 yes Figure 4-1 A schematic diagram of the paper-loading brake device and paper-film detection device of the paper-changing and paper-rolling mechanism is shown.

[0028] Figure 4-3 yes Figure 4-2 Side view of the structure shown;

[0029] Figure 4-4 yes Figure 4-1 A schematic diagram of the paper-changing mechanism shown in the figure;

[0030] Figure 4-5 yes Figure 4-1 A schematic diagram of the paper feeding mechanism shown in the figure;

[0031] Figure 4-6 yes Figure 4-5 A schematic diagram of the paper feeding mechanism from another perspective;

[0032] Figure 5 yes Figure 1 A schematic diagram of the swing shaft roller tensioning mechanism shown in the figure;

[0033] Figure 6-1 yes Figure 1 A schematic diagram of the laser marking mechanism shown in the figure;

[0034] Figure 6-2 yes Figure 6-1 A schematic diagram of the laser marking mechanism from another perspective;

[0035] Figure 7-1 yes Figure 1 The diagram shows a schematic of the structure of the tracking photoelectric sensor mark position adjustment mechanism.

[0036] Figure 7-2 yes Figure 7-1 A schematic diagram of the Y-axis displacement control mechanism shown in the figure;

[0037] Figure 7-3 yes Figure 7-1 A schematic diagram of the X-axis displacement control mechanism shown in the figure;

[0038] Figure 8-1 yes Figure 1 The diagram shows the structure of the damping mechanism.

[0039] Figure 8-2 yes Figure 8-1 A schematic diagram of one end of the damping mechanism shown in the figure;

[0040] Figure 8-3 yes Figure 8-1 A schematic diagram of the damping wheelbase adjustment mechanism in the damping mechanism shown in the figure;

[0041] Figure 9 yes Figure 1 The diagram shows the structure of the laser marking position adjustment mechanism.

[0042] In the picture:

[0043] 1-Paper film changing mechanism 2-Paper roll mechanism 3-Paper holder brake device

[0044] 4-Film feeding device; 5-Encoder alarm device; 6-Swing shaft tensioning mechanism

[0045] 7-Paper holder mechanism; 8-Laser marking mechanism; 9-Marking photoelectric sensor position adjustment machine; 10-Damping mechanism; 11-Laser marking position adjustment mechanism; 10-Lamination roller shaft distance adjustment mechanism.

[0046] 101-Film changing plate; 102-Film pressing plate; 103-Roller

[0047] 104-Tool Groove

[0048] 201-No-film alarm sensor; 202-Insufficient-film alarm sensor

[0049] 301 - Manual valve; 302 - Brake cylinder; 303 - Brake shaft

[0050] 304 - Brake paper holder lever; 305 - Brake block

[0051] 401-Film feeding motor; 402-Film feeding roller A; 403-Film pressing roller A; 601-Oscillating tension roller shaft system; 602-Fixed support roller shaft system; 501-Follower component

[0052] 502 - Encoder timing pulley; 503 - Sensor; 504 - Encoder

[0053] 701-Paper Rack Horizontal Panel A 702-Paper Rack Horizontal Panel B 703-Paper Rack Vertical Panel A

[0054] 704 - Paper rack upright plate B; 705 - Paper rack side upright plate A; 706 - Paper rack side upright plate B

[0055] 707-Shaft Support; 708-Paper Holder Long Shaft; 709-Electric Cylinder Support

[0056] 710 - Correction Cylinder; 711 - Paper Holder Support Shaft; 712 - Correction Sensor

[0057] 713 - Film bonding optoelectronics; 714 - Paper holder optoelectronics support shaft; 715 - Paper holder shaft

[0058] 81-Laser marking device; 82-Visual position adjustment device; 83-Visual inspection device

[0059] 801-Laser baffle; 802-Marking support roller; 803-Vision adjustment roller A

[0060] 804 - Visual Adjustment Roller B; 805 - Meter Counter Wheel; 806 - Visual Adjustment Gear

[0061] 807-Vision Adjustment Rack; 808-Vision Support Roller; 809-Vision Support Plate A

[0062] 810 - Visual Camera 811 - Camera Support Plate 812 - Visual Support Plate B

[0063] 813-Marking support plate A 814-Marking support plate B 91-Y-direction displacement control mechanism 92-X-direction displacement control mechanism 901-Marking motor Y

[0064] 902-Tracking screw Y 903-Tracking support Y 904-Tracking motor mount Y

[0065] 905-Tracking slider Y 906-Tracking guide Y 910-Tracking motor X

[0066] 911-Tracking Motor Mount X 912-Tracking Screw Y 913-Tracking Lead Screw X

[0067] 914-Tracking photoelectric sensor; 915-Tracking screw block X; 916-Tracking support X

[0068] 917-Marking slider X 918-Marking guide rail X 1001-Magnetic powder brake 1002-Film pressing roller B 1003-Film feeding roller B

[0069] 1011-Locking nut adjusting block; 1012-Locking nut plate; 1013-Hollow locking nut stud

[0070] 1014 - Compression Spring Screw 1015 - Compression Spring

[0071] 1101 - Movable roller; 1102 - Fixed roller; 1103 - Rack and pinion

[0072] 1104-Gear Detailed Implementation

[0073] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0074] like Figure 1 As shown, this utility model proposes a film feeding system based on dual tension range for multi-row packaging machines, including a paper rack mechanism 7. The paper rack mechanism 7 includes a frame, and a paper roll mechanism 2 is provided at the bottom of the frame. Downstream of the paper roll mechanism 2, in the film feeding direction, a paper changing mechanism 1, a film feeding device 4, a swing roller tensioning mechanism 6, a laser marking mechanism 8, a laser marking position adjustment mechanism 11, and a damping mechanism 10 are arranged in sequence. The frame is also equipped with an encoder alarm device 5 and a tracking photoelectric sensor marking position adjustment mechanism 9.

[0075] like Figure 1 , Figure 2-1 and Figure 3 As shown, the frame includes a horizontal support and a vertical support. The horizontal support consists of a paper rack horizontal plate A701 and a paper rack horizontal plate B702, and a paper rack support shaft 711 and a paper rack shaft 715 disposed between them. The vertical support consists of a paper rack vertical plate A703, a paper rack vertical plate B704, a paper rack side vertical plate A705, a paper rack side vertical plate B706, and two paper rack support shafts 711. The paper rack vertical plates A703 and B704 are sequentially arranged along the film feeding direction. Two long paper-holding shafts 708 are provided. Linear bearings are located on the paper-holding frame uprights A703 and B704. The long paper-holding shafts 708 pass through the linear bearings and are fixed to the shaft support 707. The shaft support 707 is connected to the back of the packaging machine. An electric cylinder support 709 and a correction electric cylinder 710 are located in the middle of the back of the packaging machine (above the vertical support, in the middle of the back of the packaging machine). One end of the correction electric cylinder 710 is hinged to the electric cylinder support 709, and the other end of the cylinder rod is connected to the paper-holding frame upright B704 via a screw. A box-type bearing seat passes through the paper-holding shaft 715, and the bearing seat is connected to the top of the packaging machine. The extension and retraction of the cylinder rod of the correction electric cylinder 710 can move the entire frame left and right relative to the main body of the packaging machine. A film-attaching photoelectric sensor 713 and a correction sensor 712 (e.g., ...) are located on the inner side of the paper-holding frame horizontal plate A701 along the film-feeding direction. Figure 2-2 and Figure 2-3 As shown in the diagram, the correction sensor 712 is fixed to the packaging machine, but its relative position to the paper rack is not fixed. During the paper film conveying process, its edge is within the sensor's sensing area. Figure 3As can be seen, the correction cylinder 710 is fixed to the packaging machine by the cylinder support 709. The connection between the correction cylinder 710 and the cylinder support 709 is a hinge-type connection. The extended end of the cylinder rod is connected to a long screw, and the other end of the long screw is connected to the paper holder and secured by a nut. The edge of the paper film passes through the detection probe of the correction sensor 712. When the correction sensor 712 detects that the paper film has shifted, it sends a signal to control the correction cylinder 710 to act. The cylinder rod of the correction cylinder 710 extends or retracts by a corresponding fine-tuning distance. The entire paper holder shifts in the opposite direction under the guidance of the linear bearing to compensate for the position, realizing automatic adjustment of the paper film's shift and ensuring that the paper film's position is always in a precise positioning state. The inner side of the horizontal support is provided with a paper holder photoelectric support shaft 714. The film-attaching photoelectric sensor 713 points to the paper film and is used for film-attaching detection. The film-attaching photoelectric sensor 713 can be manually adjusted axially on the paper holder photoelectric support shaft 714. Once you have manually secured it and the tape is in place, you can proceed.

[0076] The film changing mechanism 1 includes a film changing plate 101 fixed to the bottom of the frame. Each of the upper and lower sides of the film changing plate 101 has a pressure plate 102 and a roller 103. Two pressure cylinders are fixed to the back of each end of the film changing plate 101. The cylinder rods of the two pressure cylinders extend through four through holes on the film changing plate 101, and the top ends of the cylinder rods are connected to the pressure plate 102. The film is supported by the two rollers 103 and laid on the film changing plate 101, floating between the film changing plate 101 and the pressure plate 102. The retracted state of the pressure cylinders is when the pressure plate 102 presses the film tightly onto the film changing plate 101. A narrow groove is provided in the middle of the film changing plate 101, which is a cutting groove 104 for a blade to cut the film. Figure 4-1 and Figure 4-4 As shown.

[0077] The paper roll mechanism 2 is mounted at the bottom of the entire film feeding system, such as Figure 1 and Figure 2-1 As shown, the paper film is wound on the paper roll mechanism 2, according to... Figure 2-1 The film is wound along each roller and output from the top of the film feeding system. The paper roll mechanism 2 includes an air-expanding shaft mounted at the bottom of the frame, with bearings on both sides to support its positioning and rotation on the paper rack side uprights A705 and B706. Figure 4-1 , Figure 4-2 and Figure 4-3 As shown.

[0078] like Figure 1 and Figure 4-2As shown, a paper-holding brake device 3 is installed at the bottom of the frame, on the left side of the paper roll mechanism 2. The paper-holding brake device 3 includes a manual valve 301, a brake cylinder 302, a brake shaft 303, a brake paper-holding lever 304, and a brake block 305. One end of the brake cylinder 302 is fixedly supported on the side upright plate A705 of the paper-holding mechanism. The cylinder rod at the other end of the brake cylinder 302 is connected to one end of the brake paper-holding lever 304. The other end of the brake paper-holding lever 304 is connected to the brake block 305. The middle position of the brake paper-holding lever 304 is supported on the side upright plate A705 of the paper-holding mechanism. The manual valve 301 controls the extension and retraction of the cylinder rod of the brake cylinder 302. When the cylinder rod is extended, under the action of the brake paper-holding lever 304, the brake block 305 presses against the brake shaft 303, providing resistance to the brake shaft 303. In the working state, the brake block 305 is always pressed against the brake shaft 303. On the inner side of the side upright plate B706 of the paper rack, near the air expansion shaft (i.e., the axis of the paper film roll), a low film alarm sensor 202 is installed. Between the paper film roll and the roller, along the paper film (working path) and upstream of the low film alarm sensor 202, a no-film alarm sensor 201 is installed. When the paper film wound on the air expansion shaft is about to run out, the low film alarm sensor 202 sends a low film alarm signal to the controller. When the paper film is exhausted, the no-film alarm sensor 201 sends a no-film signal to the controller.

[0079] like Figure 4-1 , Figure 4-2 and Figure 4-3 As shown in Figure 4, when film splicing or replacement is required, the brake block 305 disengages from the brake shaft 303, allowing the paper roll mechanism 2 to rotate freely. During film splicing or replacement, the film-pressing cylinder is in its original position with the cylinder rod extended. By controlling the button, the cylinder rod retracts, and the paper film is pressed firmly onto the film-changing plate 101 by the film-pressing block 102. The operator then cuts the paper film along the knife groove 104 to replace and attach a new film. As shown in Figure 4, after replacing the paper film, the control button lays the new paper film flat on the film-changing plate 101, ensuring a smooth connection. The control button extends the piston of the film-pressing cylinder, lifting the film-pressing block 102, rotating the film-feeding motor 401, and tensioning the paper film, completing the film replacement process.

[0080] like Figure 4-5 and Figure 4-6 As shown, the film feeding device 4 includes a film feeding motor 401, a film feeding roller A402, and a film pressing roller A403, with the paper film located between the film feeding roller A402 and the film pressing roller A403. The two ends of the film pressing roller A403 are fixed to the locking nut adjusting block 1011 of the film pressing roller shaft distance adjusting mechanism 1010 (see details). Figure 8-2Adjusting the roller spacing of the film pressing rollers compresses the paper film, and the film feeding motor 401 starts to pull the paper film. During operation, the brake shaft 303 is braked by the brake block 305, and the paper film is pulled out from the paper film roll, so that there is a certain tension between the paper film feeding device 4 and the paper roll mechanism 2, thus forming a tension range.

[0081] like Figure 1 and Figure 2-1 As shown, the swing roller tensioning mechanism 6 is located in the middle of the frame mechanism, and the encoder alarm device 5 is located on the outside of the paper rack upright plate A703. Figure 5 As shown, the swing roller tensioning mechanism 6 includes a swing tensioning roller shaft system 601 and a fixed support roller shaft system 602, which are installed in the middle of the vertical support and arranged sequentially along the paper film direction. The fixed support roller shaft system 602 is fixed to the paper rack mechanism 7 by a threaded connection. The two ends of the swing tensioning roller shaft system 601 are positioned on the paper rack mechanism 7 by two shaft support seats, and can swing up and down on the paper rack upright plate A703 and paper rack upright plate B704. One end of the swing tensioning roller shaft system 601 extends to the outside of the vertical support. The encoder alarm device 5 includes a follower 501, an encoder synchronous wheel 502, a sensor 503, and an encoder 504 fixed to the outside of the vertical support. The follower 501 moves with the swing tensioning roller shaft system 601. One end of the swing tensioning roller shaft system 601 extends from the paper rack upright plate A703 and is connected to the follower 501. The follower 501 swings up and down synchronously. The swing angle of the oscillating tension roller shaft system 601 is controlled by the encoder synchronous pulley 502 at the end, and the encoder 504 and the synchronous pulley 502 are linked by a synchronous belt.

[0082] like Figure 1 and Figure 6-1 As shown, the laser marking mechanism 8 is located above the middle of the paper-holding mechanism 7, fixed to the paper-holding stand plate A703 and the paper-holding stand plate B704 of the paper-holding mechanism 7, and exposed on the outside of the frame. Figure 6-1 and Figure 6-2As shown, the laser marking mechanism 8 includes a laser marking device 81, a visual inspection device 83, and a visual position adjustment device 82. The laser marking device 81 includes a laser baffle 801, marking support rollers 802, marking support plate A813, and marking support plate B814. The laser baffle 801 is positioned facing the laser marking machine lens and is fixed at both ends to the marking support plate A813. The two marking support rollers 802 are respectively positioned on the upper and lower sides of the laser baffle 801, and the paper film is laid flat on the laser baffle 801 via the marking support rollers 802. The marking support plate B814 has a long groove, allowing the entire laser marking device 81 to move back and forth, adjusting the position of the laser baffle 801 within the focal length of the laser marking machine lens. The visual inspection device 83 is fixed to the inside of the coding support plate B814 and above the laser coding device 81 via the visual support plate B812. The visual inspection device 83 includes two visual support rollers 808 and a camera support plate 811. A visual camera 810 is mounted on the camera support plate 811. A visual support plate A809 is positioned facing the lens of the visual camera 810 and fixed at both ends to the visual support plate B812. The camera support plate 811 is fixed to the visual support plate B812. The visual support plate B812 has multiple sets of screw holes. The camera support plate 811 has a long groove in the front-to-back direction to adjust the position of the visual support plate A809 within the focal length of the lens of the visual camera 810. The camera support plate 811 also has a long groove in the left-to-right direction to adjust the left-to-right position of the visual camera 810. The visual position adjustment device 82 is disposed between the laser marking device 81 and the visual inspection device 83. The visual position adjustment device 82 includes a visual adjustment roller A803 and two visual adjustment rollers B804. Visual adjustment gears 806 are provided at both ends of the visual adjustment roller A803. A visual adjustment rack 807 that meshes with the visual adjustment gears 806 is provided on the inner side of the marking support plate A813. The visual adjustment gears 806 and the meshing visual adjustment rack 807 are located on the two visual adjustment rollers B804. Between the adjusting rollers B804, there is a long groove on the outer side of the gear of the coding support plate B814. Cam knobs (hand-twisted) are installed at both ends of the visual adjusting roller A803. During adjustment, the hand-twisted cam knobs cause the visual adjusting roller A803 to drive the visual adjusting gear 806 to roll and mesh on the meshing visual adjusting rack 807. This adjusts the position of the detected mark (the result of laser coding) on ​​the visual support plate A809, bringing the mark into the field of view of the visual camera 810. Tightening the cam knobs fixes the position. The lower part of the coding support plate B814 is equipped with a measuring wheel 805 (a laser coding machine accessory). The measuring wheel 805 contacts the coding support roller 802, and the encoder of the measuring wheel sends a signal to the controller of the laser coding machine to ensure the dynamic coding function of the laser coding machine.

[0083] like Figure 1 As shown, the tracking photoelectric sensor position adjustment mechanism 9 is located at the middle position of the upper part of the paper stacker frame. Figure 7-1 As shown, the tracking photoelectric sensor position adjustment mechanism 9 includes a Y-axis displacement control mechanism 91, and an X-axis displacement control mechanism 92 is fixed on the Y-axis displacement control mechanism 91. Figure 7-2 and Figure 7-3 As shown, a tracking photoelectric sensor 914 is fixed on the X-axis displacement control mechanism 92, enabling X-axis lateral movement; the X-axis displacement control mechanism 92 is fixed on the Y-axis displacement control mechanism 91, enabling longitudinal movement; both displacement mechanisms have independent motors that are driven by screws and nuts. The tracking photoelectric sensor 914 identifies the position of the paper film, providing positioning origin data for the film feeding operation of the packaging machine; both the Y-axis displacement control mechanism 91 and the X-axis displacement control mechanism 92 have independent motors and are driven by their respective independent threaded pairs.

[0084] The specific structures of the X-axis displacement control mechanism 92 and the Y-axis displacement control mechanism 91 are as follows:

[0085] like Figure 7-3 As shown, the X-axis displacement control mechanism 92 includes a tracking support X 916. A tracking motor X 910 is provided on the outside of the tracking support X916. The tracking motor X910 is located below the tracking screw block Y912, which is fixedly connected to the tracking support X916. The output end of the tracking motor X910 is connected to a tracking lead screw X913 via gear transmission. Bearings are provided at both ends of the tracking lead screw X913, which can be supported and rotated on the tracking support X916. A tracking screw block X915 is installed on the tracking lead screw block X915. A tracking slider X917 is fixedly connected to the bottom of the tracking screw block X915. A tracking slide rail X918 parallel to the tracking lead screw block X913 is fixed to the bottom of the tracking support X916. The rotation of the tracking lead screw block X913 drives the tracking screw block X915 to move laterally along the X-axis under the guidance of the guide rail slider pair. The tracking photoelectric sensor (photoelectric sensor) 914 is fixed on the tracking screw block X915 and moves synchronously with the tracking screw block X915.

[0086] like Figure 7-2As shown, the Y-axis displacement control mechanism 91 includes a tracking support Y903 fixed to the outside of the paper rack horizontal plate A701 and a tracking screw block Y912 provided on the tracking support X916; a tracking motor Y901 is installed on the outside of the tracking support Y903 via a tracking motor base Y904, and a tracking lead screw Y902 is connected to the output end of the tracking motor Y901. The tracking lead screw Y902 cooperates with the tracking screw block Y912. The tracking lead screw Y902 has bearings at both ends, which can be supported and rotated on the tracking support Y903. A tracking slide rail Y906 parallel to the tracking lead screw Y902 is fixed on the tracking support Y903. The tracking slide rail Y906 is provided with a tracking slider Y905, and the tracking slider Y905 is fixedly connected to the tracking support X916.

[0087] The tracking screws X913 and Y902 are arranged perpendicularly to each other. An X-axis displacement control mechanism 92 is mounted on the paper holder horizontal plate A701. The tracking photoelectric sensor 914 is located at the edge of the paper film. The tracking photoelectric sensor 914 can achieve X-axis left and right displacement and Y-axis forward and backward displacement. An mounting hole is also provided on the paper holder horizontal plate B702, allowing for mirroring when the user's packaging paper film cursor is set on the other side.

[0088] The X-axis displacement control mechanism 92 moves along the Y-axis on the Y-axis displacement control mechanism 91. The tracking screw block X915 on the X-axis displacement control mechanism 92 moves along the tracking lead screw X913. The tracking photoelectric sensor 914, fixed to the tracking screw block X915, can achieve accurate positioning in the XY direction. The positioning mark on the paper film for the horizontal sealing origin position is related to the product specifications. The Y-axis displacement control mechanism 91 and the X-axis displacement control mechanism 92 work together to make the tracking photoelectric sensor 914 point to the positioning mark.

[0089] like Figure 1 As shown, the laser marking position adjustment mechanism 11 is located on the upper part of the paper holder mechanism 7, as... Figure 9As shown, the laser marking position adjustment mechanism 11 includes two fixed rollers 1102 and one movable roller 1101 mounted on the horizontal support. Gears 1104 are respectively mounted at both ends of the movable roller 1101. A rack 1103 meshing with the gears 1104 is provided on the inner side of the horizontal support. An elongated slot is provided on the horizontal support at a position corresponding to the two ends of the movable roller 1101. Under the relative movement of the gear and rack pair, the two ends of the movable roller 1101 slide within the elongated slot. Cam knobs (hand-operated) are installed at both ends of the movable roller 1101. During adjustment, turning the cam knob causes the gears 1104 to roll and mesh on the rack 1103. The length of the paper film is adjusted back and forth so that the laser marking machine lens is aligned with the marking position on the paper film. The cam knob is then tightened to fix the position. Figure 9 As shown, the film-attaching photoelectric sensor 713, which is located on the inner side of the horizontal plate A701 of the paper holder, and the paper holder photoelectric sensor support shaft 714, which is located on the inner side of the horizontal support, are located at the rear of the laser marking position adjustment mechanism 11. The film-attaching photoelectric sensor 713 points to the color mark position of the paper film. The film-attaching photoelectric sensor 713 can move left and right on the paper holder photoelectric sensor support shaft 714 for film-attaching detection.

[0090] like Figure 1 and Figure 2-1 As shown, the damping mechanism 10 is disposed between the paper holder horizontal plate A701 and the paper holder horizontal plate B702, and is located at the end of the film feeding system of this utility model. Figure 8-1 , Figure 8-2 and Figure 8-3As shown, the damping mechanism 10 includes a magnetic powder brake 1001, a film pressing roller B1002, a film feeding roller B1003, and a film pressing roller shaft distance adjustment mechanism 1010. The pressure between the film pressing roller B1002 and the film feeding roller B1003 is adjusted and maintained by the film pressing roller shaft distance adjustment mechanism 1010. The film pressing roller shaft distance adjustment mechanism 1010 includes an adjustment device with the same structure respectively disposed at both ends of the film pressing roller B1002. The adjustment device includes a sleeve on the shaft of the film pressing roller B1002. The locking nut adjusting block 1011 at the end has slots on the edges of the paper holder horizontal plate A701 and the paper holder horizontal plate B702. The locking nut adjusting block 1011 has a shallow groove that engages with it. The locking nut adjusting block 1011 can slide along the slot of the paper holder horizontal plate. The locking nut adjusting block 1011 has a through hole in the middle. The shaft end of the pressure roller B1002 is locked in the through hole of the locking nut adjusting block 1011. The shaft end of the film feeding roller B1003 has a bearing, which can fix and support it between the paper holder horizontal plate A701 and the paper holder horizontal plate B702 and allow it to rotate. The locking nut adjusting block 1101 is provided with a spring screw 1014, and the spring screw 1014 is provided with a spring 1015, a locking nut plate 1012 and a hollow locking nut stud 1013 in sequence. The locking nut plate 1012 is fixed to the horizontal bracket. The spring screw 1014 passes through the hollow locking nut stud 1013 and is threadedly connected to the locking nut adjusting block 1011. The spring 1015 between the locking nut adjusting block 1011 and the hollow locking nut stud 1013 adjusts the screw depth of the hollow locking nut stud 1013 into the locking nut plate 1012, thereby adjusting the wheelbase between the film pressing roller B1002 and the film feeding roller B1003 (the smaller the distance, the tighter the film pressing, and the greater the film pulling force required by the packaging machine host during production), thus providing the tension of the paper film according to production needs. In the main system of the packaging machine, the damping value set by the PLC is achieved through the magnetic powder brake 1001. When the film pulling force required by the main system exceeds the set value, the paper film can be pulled. The distance between the two shafts of the pressure roller B1002 and the film feeding roller B1003 is adjusted and pressure is maintained by the pressure roller shaft distance adjustment mechanism.

[0091] In the film feeding system of this utility model, the film feeding device 4 pulls the film out of the film roll of the paper roll mechanism 2. At this time, the brake shaft 303 is braked by the brake block 305, so that the film forms a first tension range between the paper roll mechanism 2 and the film feeding device 4. The damping mechanism 10 is located at the output end of the film feeding system. The film is wound by the swing shaft roller tensioning mechanism 6, so that the swing tensioning roller shaft system 601 hangs down under the action of gravity, so that the film forms a second tension range between the film feeding device 4 and the damping mechanism 10. When the swing tensioning roller shaft system 601 moves up and down slightly within a certain range due to the tension of the film output end, the tension of this section of the film feeding is kept relatively stable due to its own weight. During operation, when the tension changes, i.e., the paper roll feeding status changes (such as the paper film running out or needing to be replaced), the swing range of the swing tension roller shaft system 601 will exceed the predetermined swing range. The follower 501, synchronously connected to the swing tension roller shaft system 601, will also go beyond its sensing range. The encoder 504 will send a signal to the controller and trigger an alarm, and the film feeding motor 401 will synchronously stop. This ensures that the tension at both points in the entire paper feeding system is maintained.

[0092] When splicing or changing film, the brake block 305 disengages from the brake shaft 303, allowing the paper roll mechanism 2 to rotate freely. During splicing or changing film, the pressing cylinder is in its original position with its cylinder rod extended. By using the control button, the cylinder rod retracts, and the paper film is pressed firmly onto the film changing plate 101 by the pressing block 102. The operator then cuts the paper film along the specified cutting groove to replace or attach a new film. Figure 4-1 and Figure 4-2 As shown, after replacing the film, the control button allows the new film to be laid flat on the film changing plate 101, ensuring a smooth and even fit. The control button then extends the piston of the film pressing cylinder, lifts the film pressing block 102, rotates the film feeding motor 401, and tensions the film, completing the film changing process.

[0093] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many improvements and changes under the guidance of the present invention without departing from the spirit of the present invention, and these improvements and changes are all within the protection scope of the present invention.

Claims

1. A double tension zone interval based film feeding system for a multi-column packaging machine comprising a paper stand mechanism (7) comprising a machine frame, the bottom of which is provided with a paper roll mechanism (2), the machine frame comprising horizontal and vertical supports, characterized in that, Downstream of the paper roll mechanism (2), a paper roll changing mechanism (1), a paper feeding device (4), a swing shaft roller tensioning mechanism (6), a laser code printing mechanism (8), a laser code printing position adjusting mechanism (11) and a damping mechanism (10) are sequentially arranged in the paper feeding direction, and an encoder alarm device (5) and a mark position adjusting mechanism (9) of a photoelectric sensor are further arranged on the frame; The paper roll mechanism (2) comprises an air expanding shaft installed at the bottom of the frame, bearings are arranged on both sides of the air expanding shaft and supported on a paper frame side stand A (705) and a paper frame side stand B (706), a little paper alarm sensor (202) is arranged on the inner side of the paper frame side stand B (706) and close to the air expanding shaft, and a no paper alarm sensor (201) is arranged upstream of the little paper alarm sensor (202) along the paper feeding direction; when the paper roll wound on the air expanding shaft is about to be used up, the little paper alarm sensor (202) sends a little paper alarm signal, and when the paper roll is used up, the no paper alarm sensor (201) sends a no paper signal; A paper frame brake device (3) is arranged at the bottom of the frame and on the left side of the paper roll mechanism (2), the paper frame brake device (3) comprises a manual valve (301), a brake cylinder (302), a brake shaft (303), a brake paper frame lever (304) and a brake block (305), one end of the brake cylinder (302) is fixedly supported on the paper frame side stand A (705), the cylinder rod at the other end of the brake cylinder (302) is connected with one end of the brake paper frame lever (304), the other end of the brake paper frame lever (304) is connected with the brake block (305), the brake paper frame lever (304) is supported at the middle position on the paper frame side stand A (705), the manual valve (301) controls the extension and retraction of the cylinder rod of the brake cylinder (302), in the working state, the cylinder rod is extended, under the action of the brake paper frame lever (304), the brake block (305) is pressed on the brake shaft (303) to provide resistance for the brake shaft (303); The paper feeding device (4) comprises a paper feeding motor (401), a paper feeding rubber roller A (402) and a paper pressing roller A (403), and the paper is located between the paper feeding rubber roller A (402) and the paper pressing roller A (403). The laser coding mechanism (8) comprises a laser coding device (81), a visual inspection device (83) and a visual position adjusting device (82), the laser coding device (81) comprises a laser baffle (801), a coding support roller (802), a coding support plate A (813) and a coding support plate B (814), the lower part of the coding support plate B (814) is provided with a metering wheel (805) of the laser coding machine, the visual inspection device (83) comprises two visual support rollers (808) and a camera support plate (811), the camera support plate (811) is provided with a visual camera (810), the visual position adjusting device (82) comprises a visual adjusting roller A (803) and two visual adjusting rollers B (804), the two ends of the visual adjusting roller A (803) are provided with visual adjusting gears (806), the inner side of the coding support plate A (813) is provided with a visual adjusting rack (807) engaged with the visual adjusting gears (806); The mark photoelectric sensor position adjusting mechanism (9) comprises a Y-direction displacement control mechanism (91), the X-direction displacement control mechanism (92) is fixed on the Y-direction displacement control mechanism (91), the mark photoelectric sensor (914) is fixed on the X-direction displacement control mechanism (92), the mark photoelectric sensor (914) identifies the position of the paper film, and provides positioning origin data for the film feeding work of the packaging machine; the Y-direction displacement control mechanism (91) and the X-direction displacement control mechanism (92) each have an independent motor and are driven through independent screw pairs; The laser coding position adjusting mechanism (11) comprises two fixed rollers (1102) and an active roller (1101) arranged on the horizontal support, the two ends of the active roller (1101) are respectively provided with gears (1104), the inner side of the horizontal support is provided with a rack (1103) engaged with the gears (1104), and the horizontal support is provided with notches corresponding to the two ends of the active roller (1101), and the two ends of the active roller (1101) slide in the notches under the relative movement of the gear and rack pair.

2. The dual tension zone based film feeding system of claim 1, wherein, The horizontal support is composed of paper frame horizontal plate A (701) and paper frame horizontal plate B (702), the vertical support is composed of paper frame vertical plate A (703), paper frame vertical plate B (704), paper frame side vertical plate A (705), paper frame side vertical plate B (706) and two paper frame support shafts (711), two paper frame long shafts (708) are sequentially arranged between the paper frame vertical plate A (703) and the paper frame vertical plate B (704) along the film running direction, an electric cylinder support seat (709) and a deviation correction electric cylinder (710) are arranged above the front of the vertical support, a film receiving photoelectric sensor (713) and a deviation correction sensor (712) are arranged on the inner side of the paper frame horizontal plate A (701) along the film running direction, a paper frame photoelectric support shaft (714) is arranged on the inner side of the horizontal support, the film receiving photoelectric sensor (713) is directed to the paper film and is used for film receiving detection, and the film receiving photoelectric sensor (713) can be manually adjusted to move axially on the paper frame photoelectric support shaft (714).

3. The dual tension zone based film feeding system of claim 1, wherein, The paper film replacing mechanism (1) comprises a film replacing plate (101) fixed on the bottom of a rack, one pressing film plate (102) and one roller (103) are arranged on the upper side and the lower side of the film replacing plate (101) respectively, two pressing film cylinders are fixed on the back of the two ends of the film replacing plate (101) respectively, the cylinder rods of the two pressing film cylinders are stretched out through four through holes on the film replacing plate (101), and the top end of the cylinder rod is connected with the pressing film plate (102); the paper film is supported by the two rollers (103) and is laid on the film replacing plate (101) and floats between the film replacing plate (101) and the pressing film plate (102), the cylinder rod of the pressing film cylinder is retracted, and the pressing film plate (102) is in a state of pressing the paper film on the film replacing plate (101), and a knife groove (104) is arranged at the middle position of the film replacing plate (101).

4. The dual tension zone based film feeding system of claim 1, wherein, The swing shaft roller tensioning mechanism (6) comprises a swing tensioning roller shaft system (601) and a fixed support roller shaft system (602) which are arranged in sequence along the paper film running direction and are installed in the middle part of the vertical support, and one end of the swing tensioning roller shaft system (601) is stretched out to the outside of the vertical support; the encoder alarm device (5) comprises a follower (501), an encoder synchronous wheel (502), a sensor (503) and an encoder (504) which are fixed on the outside of the vertical support, the follower (501) is driven by the swing tensioning roller shaft system (601), and the encoder (504) is connected with the encoder synchronous wheel (502) through a synchronous belt.

5. The dual tension zone based film feeding system of claim 1, wherein, The damping mechanism (10) comprises a magnetic powder brake (1001), a film pressing roller B (1002), a film feeding rubber roller B (1003) and a film pressing roller shaft distance adjusting mechanism (1010), the pressure between the film pressing roller B (1002) and the film feeding rubber roller B (1003) is adjusted and kept by the film pressing roller shaft distance adjusting mechanism (1010); the film pressing roller shaft distance adjusting mechanism (1010) comprises adjusting devices with the same structure arranged at both ends of the film pressing roller B (1002) respectively, the adjusting device comprises a lock nut adjusting block (1011) sleeved on the shaft end of the film pressing roller B (1002), the lock nut adjusting block (1011) is provided with a compression spring screw rod (1014), the compression spring screw rod (1014) is sequentially provided with a compression spring (1015), a lock nut plate (1012) and a hollow lock nut stud (1013), the lock nut plate (1012) is fixed with the horizontal support, the compression spring screw rod (1014) is threadedly connected with the lock nut adjusting block (1011) through the hollow lock nut stud (1013), the hollow lock nut stud (1013) is adjusted in the screwing depth of the lock nut plate (1012) by the compression spring (1015) between the lock nut adjusting block (1011) and the hollow lock nut stud (1013), and then the shaft distance between the film pressing roller B (1002) and the film feeding rubber roller B (1003) is adjusted, so that the pulling force of the paper film can be provided according to the production requirement.

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