A packaging structure and packaging line

Abstract

The present invention relates to the field of film material packaging, and discloses a packaging structure and a packaging line. A packaging structure comprises: a frame; a film pulling device, which comprises a film pulling driver and a film pulling claw driven by the film pulling driver, and the film pulling claw moves between a grabbing position and a releasing position; a film rolling device, which comprises a roller driver, a first rolling roller and a second rolling roller, and the first rolling roller and the second rolling roller are located between the grabbing position and the releasing position, and the roller driver is drivingly connected to the first rolling roller. The packaging structure is equipped with a film pulling device to automatically pull the packaging film to the first rolling roller and the second rolling roller, and then spread it out, with the sticky side of the packaging film facing upward, and then the film roll is transferred between the first rolling roller and the second rolling roller by a manipulator and the packaging film is pressed on the lower side, and the roller driver is started to rotate, so that the packaging film can be adhered to the film roll. The packaging structure realizes automatic film roll guarantee and improves safety and efficiency.

Description

Technical Field

[0001] The invention relates to the field of film material packaging, and in particular to a packaging structure and a packaging line. Background Art

[0002] After processing, membrane materials are usually stored in the form of film rolls. Before transporting the film rolls, the membrane materials usually need to be packaged to protect the membrane products. There are two main forms of outer packaging for membrane materials. The first is to directly glue kraft paper on the outside of the film roll, and the other is to first glue the kraft paper on the bubble film and then wrap the film roll. At present, the coating is mainly achieved manually. For manual coating of thick film rolls, it is necessary to lift the film roll with the assistance of an overhead crane, and then manually wrap the packaging film around the outside of the film roll, and then seal it with glue or hot melt. When using manual coating, on the one hand, there are safety hazards, and on the other hand, the coating efficiency is low and the coating quality is unstable. It can be seen that the current film coating scheme still has room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] The present invention provides a packaging structure, comprising:

[0005] frame;

[0006] A film-pulling device, comprising a film-pulling driver arranged in a front-to-back direction, and a film-pulling claw driven by the film-pulling driver, wherein the film-pulling claw moves between a grasping position and a releasing position;

[0007] A film rolling device includes a roller driver arranged on the frame, a first roller and a second roller rotatably mounted on the frame, the first roller and the second roller being located between the gripping position and the releasing position, and the roller driver being drivingly connected to the first roller.

[0008] The beneficial effects of the present invention are as follows: the packaging structure is equipped with a film-pulling device which automatically pulls the packaging film to the top of the first support roller and the second support roller and spreads it out, with the sticky side of the packaging film facing upwards, and then the film roll is transferred between the first support roller and the second support roller by a robot and the packaging film is pressed on the lower side, and the roller drive is started to rotate, so that the packaging film can be adhered to the film roll. The packaging structure realizes automatic film roll security and improves safety and efficiency.

[0009] Specifically, the use process of the packaging structure is as follows: first, prepare a packaging film with a sticky surface, for example, pre-cover a layer of adhesive film on the upper surface of kraft paper, and the film-pulling claw pulls the packaging film with adhesive on the top surface to the loosening position at the gripping position and loosens it, at which time the packaging film is placed on the first roll roller and the second roll roller; the film roll is placed on the top of the packaging film through the mechanical claw, at which time the film roll is bonded to the top surface of the packaging film, and the roller driver is started to drive the film roll to rotate through the first roll roller, so that the packaging film can cover the film roll and bond with the film roll. The action of the roller driver driving the film roll to rotate can be that the film roll is placed on the packaging film and then rotated in one direction until the packaging film completely covers the film roll, or it can be rotated forward several times in one direction first, and then the roller driver is rotated in the reverse direction until the packaging film completely covers the film roll. The method of first rotating forward and then reversing can ensure that the packaging film has a section firmly bonded to the film roll, so as to avoid the film roll being detached at the position where the packaging film is placed when the packaging film is subsequently wrapped.

[0010] As some sub-schemes of the above technical scheme, the film rolling device also includes a placing table, which is arranged on the frame, and the top surface of the placing table is a placing surface. An avoidance hole is provided in the middle of the placing table, and the avoidance hole is located below the film pulling claw, and the first supporting roller and the second supporting roller are connected below the avoidance hole.

[0011] As some sub-schemes of the above technical scheme, the packaging structure also includes a film wrapping device, which includes a film wrapping lifting platform that can be lifted and lowered on the frame, a first film wrapping rod rotatably connected to the film wrapping lifting platform, a second film wrapping rod rotatably connected to the film wrapping lifting platform, and a film wrapping driver that drives the first film wrapping rod and the second film wrapping rod to move away from or closer to each other, the first film wrapping rod and the second film wrapping rod are respectively located on both sides of the first winding roller and the second winding roller, and the film wrapping lifting platform drives the first film wrapping rod and the second film wrapping rod to move back and forth on the upper and lower sides of the first winding roller.

[0012] As some sub-schemes of the above technical scheme, the coating device also includes a first connecting rod and a first guide seat, the first guide seat is arranged on the frame, and a first guide surface is provided on the side of the first guide seat adjacent to the second coating rod, the first guide surface is inclined from bottom to top in the direction away from the second coating rod, the first connecting rod is hinged to the coating lifting platform, the first connecting rod swings left and right, the top of the first connecting rod is connected to the first coating rod, and a first guide block is also provided on the first connecting rod, and the first guide block slides along the first guide surface.

[0013] As some sub-schemes of the above technical scheme, the coating device also includes a second connecting rod and a second guide seat, the second guide seat is arranged on the frame, and a second guide surface is provided on the side of the second guide seat adjacent to the second coating rod, the second guide surface is inclined from bottom to top in the direction away from the second coating rod, the second connecting rod is hinged to the coating lifting platform, the second connecting rod swings left and right, the top of the second connecting rod is connected to the second coating rod, and a second guide block is also provided on the second connecting rod, and the second guide block slides along the second guide surface.

[0014] As some sub-schemes of the above technical scheme, the coating device also includes a first transmission wheel, a second transmission wheel and a synchronous wheel which are all rotatably arranged on the coating lifting platform, the first transmission wheel is fixedly connected to the first connecting rod, the first connecting rod is rotatably connected to the coating lifting platform through the first transmission wheel, the second transmission wheel is fixedly connected to the second connecting rod, the second connecting rod is rotatably connected to the coating lifting platform through the second transmission wheel, the synchronous wheel is located between the first transmission wheel and the second transmission wheel, and the synchronous wheel is transmission-connected to the first transmission wheel and the second transmission wheel.

[0015] As some sub-solutions of the above technical solution, the coating device further includes a heating component, and the heating component includes a heater arranged in the first coating rod and / or the second coating rod.

[0016] As some sub-schemes of the above technical scheme, the coating device also includes a lifting drive mechanism, which includes a chain mechanism and a lifting guide rail, both of which are arranged on the frame, and the chain mechanism includes a circulating rotating chain, which is arranged in the up and down directions, and a lifting transmission block is fixedly connected to the chain, and the lifting transmission block is fixedly connected to the coating lifting platform.

[0017] As some sub-schemes of the above technical scheme, the number of the film wrapping devices is two groups, and the two groups of film wrapping devices are respectively arranged on the front and rear sides of the first winding roller, and a film wrapping drive mechanism is arranged between the two groups of film wrapping devices, and the film wrapping drive mechanism includes a film wrapping drive motor, a film wrapping drive worm gear, a first film wrapping drive worm and a second film wrapping drive worm gear arranged on the frame, the film wrapping drive motor is drivingly connected to the film wrapping drive worm gear, the film wrapping drive worm gear is drivingly connected to the first film wrapping drive worm gear and the second film wrapping drive worm gear, and the first film wrapping drive worm gear and the second film wrapping drive worm gear are drivingly connected to the chain mechanisms in the two film wrapping devices respectively.

[0018] The present invention also provides a packaging line, comprising the packaging structure as described in any of the above technical solutions.

[0019] Since the packaging line of the present invention includes the packaging structure described in any of the above technical solutions, it also has the beneficial effects of the above packaging structure.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of an embodiment of the present invention (the film pulling claws are hidden in the figure);

[0023] Figure 2 It is a schematic structural diagram of the film drawing device, the film wrapping device and the film rolling device of the present invention;

[0024] Figure 3 It is a schematic diagram of the structures of the film wrapping device and the film rolling device.

[0025] In the attached figure:

[0026] 1- rack;

[0027] 100-film pulling device; 110-film pulling claw; 120-film pulling driver;

[0028] 200 - film rolling device; 210 - roller driver; 220 - first roller; 230 - second roller; 240 - placement table;

[0029] 300-encapsulation device; 310-encapsulation lifting platform; 320-first encapsulation rod; 321-first connecting rod; 322-first guide seat; 3221-first guide surface; 330-second encapsulation rod; 331-second connecting rod; 332-second guide seat; 3321-second guide surface; 340-first transmission wheel; 351-lifting guide rail; 352-chain mechanism; 353-lifting transmission block; 361-encapsulation drive motor; 362-encapsulation drive worm wheel; 363-first encapsulation drive worm; 364-second encapsulation drive worm. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, the meaning of "several" is an indefinite quantity, the meaning of "multiple" is more than two, "greater than", "less than", "exceed", etc. are understood as not including the number itself, and "above", "below", "within", etc. are understood as including the number itself. If there is a description of the first and the second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. The "and / or" that appears in the full text represents three parallel solutions. For example, A and / or B represents the solution satisfied by A, the solution satisfied by B, or the solution satisfied by both A and B.

[0033] In the description of the present invention, if there is a short sentence containing multiple parallel features, the attributive defines the closest feature, for example: B, C, and E connected to D are arranged on A, which means that B is arranged on A and E is connected to D, and does not constitute a limitation on C; but attributives that indicate the relationship between features, such as "interval arrangement" and "circular arrangement", do not belong to this category. If the word "all" is preceded by an attributive, it means that all features in the short sentence are limited, such as B, C, and D are all arranged on A, which means that B, C, and D are all arranged on A. For a sentence with an omitted subject, the omitted subject is the subject of the previous sentence, that is, B is arranged on A, including C, which means that B is arranged on A and A includes C.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Combine the following Figures 1 to 3 Embodiments of the present invention are described.

[0036] This embodiment relates to a packaging structure, including:

[0037] Rack 1;

[0038] The film-pulling device 100 comprises a film-pulling driver 120 arranged in a front-to-back direction, and a film-pulling claw 110 driven by the film-pulling driver 120, wherein the film-pulling claw 110 moves between a grasping position and a releasing position;

[0039] The film rolling device 200 includes a roller driver 210 arranged on the frame 1, a first roller 220 and a second roller 230 rotatably mounted on the frame 1, the first roller 220 and the second roller 230 are located between the gripping position and the releasing position, and the roller driver 210 is drivingly connected to the first roller 220.

[0040] The packaging structure is equipped with a film-pulling device 100 which automatically pulls the packaging film to the top of the first support roller 220 and the second support roller 230 and spreads it out, with the sticky side of the packaging film facing upwards. The film roll is then transferred between the first support roller 220 and the second support roller 230 by a robot and the packaging film is pressed on the lower side. The support roller driver 210 is started to rotate, so that the packaging film can be adhered to the film roll. The packaging structure realizes automatic film roll protection and improves safety and efficiency.

[0041] Specifically, the use process of the packaging structure is as follows: first, prepare a packaging film with a sticky surface, for example, pre-cover a layer of adhesive film on the upper surface of kraft paper, and the film-pulling claw 110 pulls the packaging film with adhesive on the top surface to the loosening position at the gripping position and loosens it, and the packaging film is placed on the first roll roller 220 and the second roll roller 230; the film roll is placed on the top of the packaging film through the mechanical claw, and the film roll is bonded to the top surface of the packaging film. The roller driver 210 is started to drive the film roll to rotate through the first roll roller 220, so that the packaging film can cover the film roll and bond with the film roll. The action of the roller driver 210 driving the film roll to rotate can be that the film roll is placed on the packaging film and then rotated in one direction until the packaging film completely covers the film roll, or it can be rotated forward several times in one direction first, and then the roller driver 210 is rotated in the reverse direction until the packaging film completely covers the film roll. The method of first rotating forward and then reversing can ensure that the packaging film has a section of stable adhesion to the film roll, and avoid the film roll from being detached at the position where the packaging film is placed when the packaging film is subsequently wrapped. In this embodiment, the film-pulling driver 120 is a rodless cylinder. In other embodiments, the film-pulling driver 120 can be a pneumatic push rod, an electric push rod, a hydraulic push rod, a linear module, a linear module, a screw mechanism, etc. Its main function is to provide an output end for linear motion.

[0042] Furthermore, the film rolling device 200 also includes a placement table 240, which is arranged on the frame 1, and the top surface of the placement table 240 is a placement surface. The middle part of the placement table 240 is provided with an avoidance hole, and the avoidance hole is located below the film drawing claw 110, and the first support roller 220 and the second support roller 230 are connected below the avoidance hole. The placement table 240 is arranged between the film drawing claw 110, the first support roller 220 and the second support roller 230. The film drawing claw 110 pulls the packaging film to the placement table 240 for placement, which can improve the flatness of the packaging film and improve the accuracy of the adhesion of the film drawing claw 110. The film drawing device 100 is specifically provided with two groups, and the two groups of film drawing devices 100 are respectively located on both sides of the film rolling device 200.

[0043] Furthermore, the packaging structure further includes a film wrapping device 300, which includes a film wrapping lifting platform 310 that is escalably arranged on the frame 1, a first film wrapping rod 320 that is rotatably connected to the film wrapping lifting platform 310, a second film wrapping rod 330 that is rotatably connected to the film wrapping lifting platform 310, and a film wrapping driver that drives the first film wrapping rod 320 and the second film wrapping rod 330 to move away from or close to each other, the first film wrapping rod 320 and the second film wrapping rod 330 are respectively located on both sides of the first roll support roller 220 and the second roll support roller 230, and the film wrapping lifting platform 310 drives the first film wrapping rod 320 and the second film wrapping rod 330 to move back and forth on the upper and lower sides of the first roll support roller 220. By configuring the film wrapping device 300, the packaging structure can also wrap the film roll in a clamping manner to adapt to the packaging requirements of different packaging film materials. The working principle of the film wrapping device 300 is as follows: before use, the packaging film and the film roll are first placed on the first roller and the second roller, and then the film wrapping lifting platform 310 drives the first film wrapping rod 320 and the second film wrapping rod 330 to rise, lift the two sides of the packaging film to the top of the film roll, and then the film wrapping driver drives the first film wrapping rod 320 and the second film wrapping rod 330 to move closer to each other to close the packaging film, completing the packaging of the film roll. After the packaging film is closed, the connection between the two sides of the packaging film can be achieved by pre-coating the packaging film with glue, or by hot-melting the two sides of the packaging film together.

[0044] Furthermore, the coating device 300 also includes a first connecting rod 321 and a first guide seat 322. The first guide seat 322 is arranged on the frame 1. The first guide seat 322 is provided with a first guide surface 3221 on the side of the first guide seat 322 adjacent to the second coating rod 330. The first guide surface 3221 is inclined from bottom to top in the direction away from the second coating rod 330. The first connecting rod 321 is hinged to the coating lifting platform 310. The first connecting rod 321 swings left and right. The top of the first connecting rod 321 is connected to the first coating rod 320. The first connecting rod 321 is also provided with a first guide block, and the first guide block slides along the first guide surface 3221. The first film wrapping rod 320 is hinged to the film wrapping lifting platform 310 through the first connecting rod 321. When the film wrapping lifting platform 310 drives the first film wrapping rod 320 and the first connecting rod 321 to rise, the first guide block slides along the first guide surface 3221, so that the first film wrapping rod 320 swings away from the second film wrapping rod 330 during the rising process, thereby increasing the span between the first film wrapping rod 320 and the second film wrapping rod 330 and expanding the maximum diameter of the film roll that can be wrapped by the film wrapping device 300.

[0045] Further, the film coating device 300 further includes a second connecting rod 331 and a second guide seat 332, the second guide seat 332 is arranged on the frame 1, a second guide surface 3321 is arranged on the side of the second guide seat 332 adjacent to the second film coating rod 330, the second guide surface 3321 is inclined from bottom to top in the direction away from the second film coating rod 330, the second connecting rod 331 is hinged to the film coating lifting platform 310, the second connecting rod 331 swings left and right, the top of the second connecting rod 331 is connected to the second film coating rod 330, and a second guide block is further arranged on the second connecting rod 331, and the second guide block slides along the second guide surface 3321. The functions of the second connecting rod 331, the second guide seat 332 and the second guide block are similar to those of the first connecting rod 321, the first guide seat 322 and the first guide block. The second connecting rod 331, the second guide seat 332 and the second guide block are configured so that the second film wrapping rod 330 swings in a direction away from the first film wrapping rod 320 during the rising process, further increasing the span between the first film wrapping rod 320 and the second film wrapping rod 330, and expanding the maximum diameter of the film roll that can be wrapped by the film wrapping device 300. In addition, the first film wrapping rod 320 and the second film wrapping rod 330 swing in a direction away from each other during the rising process, and the lateral movement force generated by the first film wrapping rod 320 and the second film wrapping rod 330 on the packaging film due to the swinging can offset each other, reducing the lateral movement of the packaging film caused by the swinging.

[0046] In this embodiment, the envelope driver is a cylinder, and a fixed end and a driving end of the cylinder are hinged to the first connecting rod 321 and the second connecting rod 331 respectively.

[0047] Furthermore, the coating device 300 also includes a first transmission wheel 340, a second transmission wheel and a synchronous wheel which are all rotatably arranged on the coating lifting platform 310, the first transmission wheel 340 is fixedly connected to the first connecting rod 321, the first connecting rod 321 is rotatably connected to the coating lifting platform 310 through the first transmission wheel 340, the second transmission wheel is fixedly connected to the second connecting rod 331, the second connecting rod 331 is rotatably connected to the coating lifting platform 310 through the second transmission wheel, the synchronous wheel is located between the first transmission wheel 340 and the second transmission wheel, and the synchronous wheel is transmission-connected to the first transmission wheel 340 and the second transmission wheel. The synchronous wheel is in contact with the first transmission wheel 340 and the second transmission wheel respectively located on both sides of the synchronous wheel, which can ensure that the first transmission wheel 340 and the second transmission wheel rotate synchronously, so that the first film wrapping rod 320 and the second film wrapping rod 330 can swing synchronously through the first connecting rod 321 and the second connecting rod 331. When the first film wrapping rod 320 and the second film wrapping rod 330 are driven inward by the film wrapping driver, that is, in the direction of approaching each other, when swinging, the packaging film can symmetrically wrap the film roll, thereby ensuring the fit between the packaging film and the film roll to the greatest extent. Compared with the film rolling device 200, the film wrapping device 300 is

[0048] Furthermore, the film wrapping device 300 further includes a heating assembly (not shown in the figure), and the heating assembly includes a heater disposed in the first film wrapping rod 320 and / or the second film wrapping rod 330. By configuring the heating assembly and arranging the heating wire in the first film wrapping rod 320 and / or the second film wrapping rod 330, the first film wrapping rod 320 and the second film wrapping rod 330 can conveniently perform hot-melt processing when clamping the packaging film.

[0049] Furthermore, the film coating device 300 further includes a lifting drive mechanism, which includes a chain mechanism 352 and a lifting guide rail 351, both of which are arranged on the frame 1, and the chain mechanism 352 includes a circulating chain, which is arranged in the up-down direction, and a lifting transmission block 353 is fixedly connected to the chain, and the lifting transmission block 353 is fixedly connected to the film coating lifting platform 310. The film coating lifting platform 310 in the film coating device 300 is driven to rise and fall by the chain mechanism 352, which has the advantage of low cost.

[0050] Furthermore, there are two groups of the film coating devices 300, which are respectively arranged on the front and rear sides of the first winding roller 220, and a film coating drive mechanism is arranged between the two groups of the film coating devices 300. The film coating drive mechanism includes a film coating drive motor 361, a film coating drive worm gear 362, a first film coating drive worm 363 and a second film coating drive worm 364 arranged on the frame 1. The film coating drive motor 361 is drivingly connected to the film coating drive worm gear 362, and the film coating drive worm gear 362 is drivingly connected to the first film coating drive worm 363 and the second film coating drive worm 364. The first film coating drive worm 363 and the second film coating drive worm 364 are respectively drivingly connected to the chain mechanisms 352 in the two film coating devices 300. Two groups of film wrapping devices 300 are configured to drive the first film wrapping rod 320 and the second film wrapping rod 330 to move in a more balanced and stable manner. The chains of the two groups of film wrapping devices 300 are connected by the transmission of the first film wrapping drive worm 363, the second film wrapping drive worm 364 and the film wrapping drive worm wheel 362 to achieve synchronous rotation, ensuring that the chain mechanisms 352 of the two groups of film wrapping devices 300 move in unison and balance the lifting and lowering of the first film wrapping rod 320 and the second film wrapping rod 330.

[0051] Both the film wrapping device 300 and the film rolling device 200 can wrap the film roll. When the film rolling device 200 wraps the film roll, it mainly relies on the glue pre-coated on the top surface of the packaging film to adhere to the film roll and keep it fixed. This type is particularly suitable for packaging films with flat surfaces, such as kraft paper packaging films, PVC packaging films, etc. However, for some non-flat packaging films with uneven surfaces, such as bubble film, the amount of glue that can be adhered to the same area on the surface of non-flat packaging films is small, and the film roll is prone to falling off when the film wrapping device 300 is used to adhere to the film roll. The film wrapping device 300 in the present disclosure fixes the packaging film and the film roll by closing the film roll after wrapping it. There is no need to pre-coat glue on the surface of the packaging film, and the surface flatness requirement is relatively low. It can be adapted to different packaging films for packaging operations.

[0052] The present disclosure also provides an embodiment of a packaging line, which includes an embodiment of any of the above-mentioned packaging structures. The packaging line can conveniently and efficiently realize automatic packaging of roll film, improve safety, and improve production efficiency. It has two automatic realization modes of film rolling and film wrapping, and can adapt to the use of different film materials.

[0053] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A packaging structure, characterized in that: include: Rack (1); A film-pulling device (100) comprises a film-pulling driver (120) arranged in a front-to-back direction, and a film-pulling claw (110) driven by the film-pulling driver (120), wherein the film-pulling claw (110) moves between a grasping position and a releasing position; A film rolling device (200), comprising a roller driver (210) arranged on the frame (1), a first roller (220) and a second roller (230) both rotatably mounted on the frame (1), the first roller (220) and the second roller (230) being located between the gripping position and the releasing position, and the roller driver (210) being drivingly connected to the first roller (220); The film rolling device (200) further comprises a placement table (240), wherein the placement table (240) is arranged on the frame (1), the top surface of the placement table (240) is a placement surface, a middle portion of the placement table (240) is provided with an avoidance hole, the avoidance hole is located below the film pulling claw (110), and the first support roller (220) and the second support roller (230) are connected below the avoidance hole; The packaging structure further comprises a film wrapping device (300), the film wrapping device (300) comprising a film wrapping lifting platform (310) movably arranged on the frame (1), a first film wrapping rod (320) rotatably connected to the film wrapping lifting platform (310), a second film wrapping rod (330) rotatably connected to the film wrapping lifting platform (310) and the film wrapping lifting platform (310), and a film wrapping driver for driving the first film wrapping rod (320) and the second film wrapping rod (330) to move away from or approach each other, the first film wrapping rod (320) and the second film wrapping rod (330) being respectively located on both sides of the first winding roller (220) and the second winding roller (230), and the film wrapping lifting platform (310) drives the first film wrapping rod (320) and the second film wrapping rod (330) to move back and forth on the upper and lower sides of the first winding roller (220); The film coating device (300) further comprises a first connecting rod (321) and a first guide seat (322), wherein the first guide seat (322) is arranged on the frame (1), and a first guide surface (3221) is arranged on the side of the first guide seat (322) adjacent to the second film coating rod (330), and the first guide surface (3221) is inclined from bottom to top in a direction away from the second film coating rod (330), and the first connecting rod (321) is hinged to the film coating lifting platform (310), and the first connecting rod (321) swings left and right, and the top of the first connecting rod (321) is connected to the first film coating rod (320), and a first guide block is also arranged on the first connecting rod (321), and the first guide block slides along the first guide surface (3221); The film coating device (300) further comprises a second connecting rod (331) and a second guide seat (332), wherein the second guide seat (332) is arranged on the frame (1), and a second guide surface (3321) is arranged on the side of the second guide seat (332) adjacent to the second film coating rod (330), and the second guide surface (3321) is inclined from bottom to top in a direction away from the second film coating rod (330), and the second connecting rod (331) is hinged to the film coating lifting platform (310), and the second connecting rod (331) swings left and right, and the top of the second connecting rod (331) is connected to the second film coating rod (330), and a second guide block is also arranged on the second connecting rod (331), and the second guide block slides along the second guide surface (3321); The coating device (300) further comprises a first transmission wheel (340), a second transmission wheel and a synchronous wheel, all of which are rotatably arranged on the coating lifting platform (310); the first transmission wheel (340) is fixedly connected to the first connecting rod (321); the first connecting rod (321) is rotationally connected to the coating lifting platform (310) via the first transmission wheel (340); the second transmission wheel is fixedly connected to the second connecting rod (331); the second connecting rod (331) is rotationally connected to the coating lifting platform (310) via the second transmission wheel; the synchronous wheel is located between the first transmission wheel (340) and the second transmission wheel; the synchronous wheel is transmission-connected to both the first transmission wheel (340) and the second transmission wheel.

2. A packaging structure according to claim 1, characterized in that: The coating device (300) further comprises a heating component, wherein the heating component comprises a heater disposed in the first coating rod (320) and / or the second coating rod (330).

3. A packaging structure according to claim 1 or 2, characterized in that: The coating device (300) further comprises a lifting drive mechanism, the lifting drive mechanism comprising a chain mechanism (352) and a lifting guide rail (351), the chain mechanism (352) and the lifting guide rail (351) are both arranged on the frame (1), the chain mechanism (352) comprises a circulating chain, the chain is arranged in the up and down direction, a lifting transmission block (353) is fixedly connected to the chain, and the lifting transmission block (353) is fixedly connected to the coating lifting platform (310).

4. A packaging structure according to claim 3, characterized in that: The number of the film coating devices (300) is two groups, and the two groups of film coating devices (300) are respectively arranged on the front side and the rear side of the first winding roller (220). A film coating driving mechanism is arranged between the two groups of the film coating devices (300), and the film coating driving mechanism comprises a film coating driving motor (361), a film coating driving worm gear (362), a first film coating driving worm (363) and a second film coating driving worm (364) arranged on the frame (1). The film coating driving motor (361) is drivingly connected to the film coating driving worm gear (362), and the film coating driving worm gear (362) is drivingly connected to the first film coating driving worm (363) and the second film coating driving worm (364). The first film coating driving worm (363) and the second film coating driving worm (364) are respectively drivingly connected to the chain mechanisms (352) in the two film coating devices (300).

5. A packaging line, characterized in that: The invention comprises the packaging structure as claimed in any one of claims 1 to 4.

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