Ejecting device and packaging machine comprising same

Abstract

The utility model discloses a material ejecting device and a packaging machine comprising the material ejecting device. A material jacking device comprises a material jacking driving device, a material jacking structure and a via hole bearing structure, a mounting plate is arranged at the output end of the material jacking driving device, the material jacking structure and the via hole bearing structure are both arranged on the mounting plate, and the material jacking driving device can drive the material jacking structure and the via hole bearing structure to ascend and descend synchronously. When the material ejecting structure ejects the packaging box to the position corresponding to the packaging table, the through hole bearing structure corresponds to the film penetrating hole in the packaging table in position, and the packaging box can pass through the film penetrating hole. The device has the beneficial effects that the material ejecting structure and the via hole bearing structure can synchronously ascend and descend, so that a good action matching effect can be achieved without excessive adjustment between the material ejecting structure and the via hole bearing structure, the packaging box conveying and film covering packaging fluency is improved, and the packaging efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging equipment technology, and in particular to a feeding device and a packaging machine including the feeding device. Background Technology

[0002] A packaging machine includes a feeding device, a top-feeding device, and a laminating device. The feeding device conveys packaging boxes containing products towards the laminating device. Before the packaging boxes are fed into the laminating device, the top-feeding device lifts the boxes, and then a pusher device feeds them into the laminating device. The laminating device includes a film feeding structure, and the packaging machine includes a packaging table with a film-perforation hole. The film feeding structure feeds the packaging film above the film-perforation hole, allowing the film to pass downwards through the hole to the underside of the packaging table. After the top-feeding device lifts the packaging box to the corresponding height on the packaging table, the pusher device pushes the box onto the packaging table, ensuring the box, with the film pressing against it, passes through the film-perforation hole. Once the box has completely passed through the hole, a cutting mechanism cuts the film.

[0003] In the aforementioned packaging machine, since the film-piercing hole is generally quite wide, a through-hole support plate is installed on the underside of the packaging table to allow the packaging box to pass through smoothly. Before the packaging box passes through the film-piercing hole, the through-hole support plate is moved to the position corresponding to the film-piercing hole; after the packaging box passes through the film-piercing hole, the through-hole support plate will move away from the film-piercing hole, allowing the packaging film to pass through smoothly through the film-piercing hole.

[0004] However, existing packaging machines have at least the following shortcomings: 1. The ejector device and the through-hole support plate need to coordinate well to allow the packaging box to smoothly complete the ejection and pushing process. However, the existing ejector device and through-hole support plate are controlled separately. It takes time to adjust them so that they can work together well. Moreover, after a period of time, problems with their coordination will occur, and they will need to be readjusted, affecting the production schedule; 2. The existing through-hole support plate is controlled by a cylinder. If the through-hole support plate moves at a fast pace, it is easy to cause a lot of noise. Utility Model Content

[0005] The main objective of this invention is to provide a top-feeding device that addresses at least one deficiency in the existing technology.

[0006] To achieve the above objectives, this utility model proposes a feeding device, including a feeding drive device, a feeding structure, and a through-hole support structure. The output end of the feeding drive device is provided with a mounting plate. The feeding structure and the through-hole support structure are both mounted on the mounting plate. The feeding drive device can drive the feeding structure and the through-hole support structure to rise and fall synchronously, so that when the feeding structure lifts the packaging box to a position corresponding to the packaging platform, the through-hole support structure corresponds to the position of the film-piercing hole on the packaging platform, allowing the packaging box to pass through the film-piercing hole.

[0007] The beneficial effects of this invention are as follows: When the top-feeding device of this invention is applied to a packaging machine, the top-feeding device lifts the packaging box to a position where its bottom surface is flush with or slightly higher than the packaging platform. Simultaneously, the through-hole support structure partially enters the film-piercing hole, with its upper side flush with or slightly higher than the packaging platform. This allows the packaging box to smoothly pass through the film-piercing hole when the subsequent pushing device pushes the box for film-sealing. In this invention, the top-feeding structure and the through-hole support structure can rise and fall synchronously, achieving good coordination without excessive adjustment. This improves the smoothness of box conveying and film-sealing, thus increasing packaging efficiency.

[0008] Preferably, the top material structure includes a top material frame and a top material plate. The top material frame includes a fixed frame and a movable frame. The fixed frame is fixedly mounted on the mounting plate and has mounting holes with elastic elements inside. The movable frame is inserted into the mounting holes and presses against the elastic elements. The fixed frame supports the movable frame through the elastic elements, and the top material plate is located on the upper side of the movable frame. By using elastic elements to support the movable frame, it is possible to accommodate the top material conveying of packaging boxes of different thicknesses, which helps to expand the application range of the top material device and the packaging machines using it.

[0009] Preferably, the mounting hole penetrates the fixed frame, and a through-rod hole is provided on the mounting plate at the position corresponding to the mounting hole. A support rod is provided at the lower end of the movable frame. The elastic element includes a spring, the lower end of which is fixedly connected to the bottom of the fixed frame. The support rod passes through the spring and the through-rod hole. A first limiting plate is provided on the support rod, located below the through-rod hole. The first limiting plate is used to restrict the upward movement of the support rod. A sensing plate is also provided at the output end of the top material drive device. The sensing plate has a sensing structure that communicates with the top material drive device. The sensing structure is located below the through-rod hole. When the support rod touches the sensing structure, the top material drive device stops lifting. This configuration helps reduce the probability of damage to packaging boxes and products, reduces the scrap rate, and improves production efficiency.

[0010] Preferably, the support rod is a screw rod, and the lower side of the movable frame is provided with a screw hole. The screw rod is screwed to the screw hole, so that the distance between the lower end of the support rod and the sensing structure can be adjusted, which can more effectively protect the packaging box and the product and further reduce the scrap rate.

[0011] Preferably, the top material structure includes a baffle plate, which is fixed to the top material plate and located on the side of the top material frame away from the through hole support structure. This prevents the packaging box and product from being damaged when the top material plate descends, and also prevents the packaging box and product from falling off the conveyor surface, thereby further protecting the product and reducing the scrap rate.

[0012] Preferably, the top material drive device includes a base and a servo electric cylinder. The servo electric cylinder is mounted on the base, which has a longitudinally extending guide rail. A connector is mounted on the mounting plate, and a slider is mounted on the connector. The connector is slidably connected to the guide rail via the slider, which helps to improve the accuracy of the movement and positioning of the top material structure and the through hole support structure.

[0013] Preferably, the through-hole support structure includes a support frame and a support plate. The support frame is mounted on the mounting plate, and the support plate is located on the upper side of the support frame. An arc-shaped connecting surface is provided between the upper side of the support plate and the side near the top material structure, which improves the fault tolerance of the top material drive device and facilitates smoother conveying of the packaging box.

[0014] This utility model also discloses a packaging machine, including the above-mentioned feeding device.

[0015] Preferably, the packaging machine also includes a frame, on which a second limiting plate is provided. The second limiting plate is located directly above the top material structure and is used to restrict the upward movement of the packaging boxes. The second limiting plate helps to screen and identify improperly placed or misaligned packaging boxes, thus improving packaging quality.

[0016] Preferably, the packaging machine also includes a frame, on which a packaging table and a film feeding device are provided. The packaging table is provided with a film-piercing hole. The film feeding device is used to transport the packaging film to the top of the film-piercing hole so that the packaging film can pass through the film-piercing hole. The through-hole support structure is directly opposite the film-piercing hole. When the packaging box passes through the film-piercing hole, the top material driving device lifts the through-hole support structure to its upper side and enters the film-piercing hole to support the packaging box. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the top material feeding device in an embodiment of this utility model;

[0019] Figure 2 This is an exploded view of the mounting plate and top material structure in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the mounting plate, sensing plate, top material structure, and through hole support structure in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the through-hole support structure in an embodiment of this utility model;

[0022] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0023] Figure 6 This is a comparative schematic diagram showing the top material of the packaging box when it is normally placed and the top material of the packaging box when it is tipped over in this embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the packaging table, film feeding device, conveying table, pushing device, second limiting plate and ejecting device of the packaging machine in the embodiment of this utility model when ejecting material;

[0025] Figure 8 for Figure 7 A magnified view of a section at point B.

[0026] In the attached diagram: 1-Top material drive device, 11-Servo electric cylinder, 12-Base, 121-Guide rail, 2-Top material structure, 21-Top material plate, 22-Top material frame, 221-Fixed frame, 2211-Mounting hole, 222-Movable frame, 23-Elastic element, 231-Spring, 24-Support rod, 241-First limit plate, 242-Screw, 25-Baffle, 3-Through hole support structure, 31-Support frame, 32-Support plate, 33-Arc-shaped connecting surface, 4-Mounting plate, 41-Through rod hole, 5-Connector, 51-Slider, 6-Induction plate, 61-Induction structure, 10-Packaging table, 101-Film through hole, 20-Film feeding device, 30-Conveying table, 301-Conveying surface, 40-Pushing device, 50-Packaging film, 60-Packaging box, 70-Second limit plate.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators, such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] like Figures 1 to 8 As shown, a feeding device includes a feeding drive device 1, a feeding structure 2, and a through hole support structure 3. The output end of the feeding drive device 1 is provided with a mounting plate 4. The feeding structure 2 and the through hole support structure 3 are both provided on the mounting plate 4. The feeding drive device 1 can drive the feeding structure 2 and the through hole support structure 3 to rise and fall synchronously, so that when the feeding structure 2 lifts the packaging box 60 to a position corresponding to the packaging platform 10, the position of the through hole support structure 3 corresponds to the position of the film penetration hole 101 on the packaging platform 10, so that the packaging box 60 can pass through the film penetration hole 101.

[0032] When the top-feeding device of this embodiment is applied to a packaging machine, the top-feeding device lifts the packaging box 60 to a position where its bottom surface is flush with or slightly higher than the packaging platform 10. Simultaneously, the through-hole support structure 3 partially enters the film-perforation hole 101, with its upper side flush with or slightly higher than the packaging platform 10. This allows the packaging box 60 to smoothly pass through the film-perforation hole 101 when the subsequent pushing device 40 pushes it for film-coating. In this embodiment, the top-feeding structure 2 and the through-hole support structure 3 can rise and fall synchronously, achieving good coordination without excessive adjustment. This improves the smoothness of the packaging box 60's conveying and film-coating process, thus enhancing packaging efficiency.

[0033] In some specific embodiments, reference is made to Figure 2 The top material structure 2 includes a top material frame 22 and a top material plate 21. The top material frame 22 includes a fixed frame 221 and a movable frame 222. The fixed frame 221 is fixedly mounted on the mounting plate 4. The fixed frame 221 is provided with a mounting hole 2211. An elastic element 23 is provided in the mounting hole 2211. The movable frame 222 is inserted into the mounting hole 2211 and presses against the elastic element 23. The fixed frame 221 supports the movable frame 222 through the elastic element 23. The top material plate 21 is located on the upper side of the movable frame 222.

[0034] During the feeding process, the feeding device works in conjunction with the second limiting plate 70 on the packaging machine to lift the packaging box 60 to a suitable height before pushing it out. The second limiting plate 70 is located directly above the feeding device and is used to restrict the upward movement of the packaging box 60. By providing elastic elements 23 to support the movable frame 222, it is possible to accommodate feeding packaging boxes 60 of different thicknesses, which helps to expand the applicability of the feeding device and the packaging machine using it.

[0035] In some specific embodiments, reference is made to Figure 2 and Figure 6 The mounting hole 2211 passes through the fixed frame 221. The mounting plate 4 has a through hole 41 at the position corresponding to the mounting hole 2211. The lower end of the movable frame 222 is provided with a support rod 24. The elastic element 23 includes a spring 231. The lower end of the spring 231 is fixedly connected to the bottom of the fixed plate 221. The support rod 24 passes through the spring 231 and the through hole 41. The support rod 24 is provided with a first limiting plate 241. The first limiting plate 241 is located below the through hole 41. The first limiting plate 241 is used to limit the upward movement of the support rod 24. The output end of the top material driving device 1 is also provided with a sensing plate 6. The sensing plate 6 is provided with a sensing structure 61 that is communicatively connected to the top material driving device 1. The sensing structure 61 is located below the through hole 41. When the support rod 24 touches the sensing structure 61, the top material driving device 1 stops lifting.

[0036] During the material conveying process, refer to Figure 6 As shown in the right figure, the packaging box 60 may tip over, increasing its height. Due to the limiting effect of the second limiting plate 70, the tipped packaging box 60 cannot be pushed to the target height corresponding to the packaging platform 10, and will compress the movable frame 222. Since the fixed frame 221 rises during the lifting process, the movable frame 222 moves downwards relative to the fixed frame 221, and the support rod 24 moves towards the sensing structure 61. When the support rod 24 touches the sensing structure 61, it indicates a possible abnormality in the lifting process. At this time, the lifting drive device 1, receiving the signal from the sensing structure 61, stops the lifting action so that technicians can inspect and repair it. This design helps reduce the probability of damage to the packaging box 60 and the product, reduces the scrap rate, and improves production efficiency.

[0037] In some specific embodiments, reference is made to Figure 2 and Figure 6 The support rod 24 is a screw rod 242, and the lower side of the movable frame 222 is provided with a screw hole, and the screw rod 242 is screwed to the screw hole.

[0038] Using screw 242 as support rod 24 allows for adjustment of the relative position between support rod 24 and movable frame 222. Adjusting the distance between the lower end of support rod 24 and movable frame 222 also adjusts the distance between the lower end of support rod 24 and sensing structure 61. This configuration allows the top-loading device to control the timing of stopping the top-loading drive device 1 by adjusting the distance between the lower end of support rod 24 and sensing structure 61, based on different packaging requirements. This provides more targeted protection for the packaging box 60 and the product, further reducing the scrap rate.

[0039] In some other embodiments, the support rod 24 is fixed to the lower side of the movable frame 222 in an adjustable manner.

[0040] In some specific embodiments, reference is made to Figure 2 and Figure 3 The top material structure 2 includes a baffle 25, which is fixed on the top material plate 21 and located on the side of the top material frame 22 away from the through hole support structure 3.

[0041] After the top material structure 2 lifts the packaging box 60, the top material plate 21 will be higher than the conveying surface 301 of the conveyor table 30. In this embodiment, a baffle 25 is provided to prevent the next packaging box 60 from moving from the conveying surface 301 to below the top material plate 21 after the top material structure 2 lifts the previous packaging box 60. This avoids the packaging box 60 and the product being damaged when the top material plate 21 descends, and also prevents the packaging box 60 and the product from falling off the conveying surface 301, further protecting the product and reducing the scrap rate.

[0042] In some specific embodiments, reference is made to Figure 1 The top material drive device 1 includes a base 12 and a servo cylinder 11. The servo cylinder 11 is mounted on the base 12. The base 12 is provided with a longitudinally extending guide rail 121. The mounting plate 4 is provided with a connector 5. The connector 5 is provided with a slider 51. The connector 5 is slidably connected to the guide rail 121 through the slider 51.

[0043] Using a servo electric cylinder 11 as the drive device improves the accuracy of movement and positioning of the top material structure 2 and the through hole support structure 3, making the process of conveying and packaging the packaging box 60 smoother. The arrangement of the guide rail 121 and the slider 51 helps to improve the stability of movement of the top material structure 2 and the through hole support structure 3, reducing the possibility of deviation.

[0044] The through hole support plate 32 is raised and lowered by the servo electric cylinder 11. Compared with the previous structure that used a cylinder to drive the through hole support plate 32, even if the movement rhythm of the through hole support plate 32 is accelerated, there will be no excessive noise, which is conducive to optimizing the user experience.

[0045] In other embodiments, the lifting and lowering of the top material structure 2 and the through hole support structure 3 are carried out by means of "motor + lead screw" or "motor + gear rack".

[0046] In some specific embodiments, reference is made to Figures 3 to 5 The through-hole support structure 3 includes a support frame 31 and a support plate 32. The support frame 31 is mounted on the mounting plate 4, and the support plate 32 is mounted on the upper side of the support frame 31. An arc-shaped connecting surface 33 is provided between the upper side of the support plate 32 and the side near the top material structure 2.

[0047] An arc-shaped connecting surface 33 is provided between the upper side of the support plate 32 and the side near the top material structure 2, so that when the packaging box 60 passes through the film penetration hole 101, the support plate 32 can be flush with or slightly higher than the packaging platform 10. If the support plate 32 is slightly higher than the packaging platform 10, the packaging box 60 can move along the arc-shaped connecting surface 33 onto the support plate 32, and then move from the support plate 32 to the packaging platform 10 on the other side. This arrangement means that the support plate 32 does not necessarily have to be flush with the packaging platform 10, improving the fault tolerance of the top material drive device 1 and facilitating smoother conveying of the packaging box 60. Moreover, the arc-shaped connecting surface 33 can also reduce the possibility of damage to the packaging box 60, protecting the packaging box 60.

[0048] Furthermore, an arc-shaped connecting surface 33 is also provided between the lower side of the support plate 32 and the side away from the top material structure 2, so that the packaging box 60 moves more smoothly from the support plate 32 to the packaging table 10, improving the smoothness of the conveying of the packaging box 60.

[0049] This embodiment also discloses a packaging machine, see reference. Figures 6 to 8 This includes the aforementioned top material device.

[0050] In some specific embodiments, reference is made to Figure 6 and Figure 7 The packaging machine also includes a frame, on which a second limiting plate 70 is provided. The second limiting plate 70 is located directly above the top material structure 2 and is used to restrict the packaging box 60 from moving upward.

[0051] By setting the second limiting plate 70, only properly placed and appropriately sized packaging boxes 60 can be lifted by the top-feeding device and pushed onto the packaging table 10 by the pushing device 40. Furthermore, with the cooperation of the second limiting plate 70, when the top-feeding device lifts a tilted packaging box 60, the second limiting plate 70 can press against the movable frame 222 through the packaging box 60, causing the support rod 24 to contact the sensing structure 61, thereby stopping the top-feeding drive device 1 from lifting. Therefore, setting the second limiting plate 70 helps to screen and identify improperly placed or misaligned packaging boxes 60, thus improving packaging quality.

[0052] In some specific embodiments, reference is made to Figure 7 and Figure 8 The packaging machine also includes a frame, on which a packaging table 10 and a film feeding device 20 are provided. The packaging table 10 is provided with a film-penetrating hole 101. The film feeding device 20 is used to transport the packaging film 50 to the top of the film-penetrating hole 101 so that the packaging film 50 can pass through the film-penetrating hole 101. The through-hole support structure 3 is directly opposite the film-penetrating hole 101. When the packaging box 60 passes through the film-penetrating hole 101, the top material driving device 1 lifts the through-hole support structure 3 to its upper side and enters the film-penetrating hole 101 to support the packaging box 60.

[0053] When the upper side of the through hole support structure 3, i.e. the support plate 32, enters the through hole 101, a gap of about 10mm is left between the support plate 32 and the side wall of the through hole 101 to allow the packaging film 50 to pass through and move.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A top-feeding device, characterized in that: The device includes a top material driving device (1), a top material structure (2), and a through hole support structure (3). The output end of the top material driving device (1) is provided with a mounting plate (4). The top material structure (2) and the through hole support structure (3) are both located on the mounting plate (4). The top material driving device (1) can drive the top material structure (2) and the through hole support structure (3) to rise and fall synchronously. When the top material structure (2) lifts the packaging box (60) to a position corresponding to the packaging platform (10), the through hole support structure (3) corresponds to the position of the perforation hole (101) on the packaging platform (10), allowing the packaging box (60) to pass through the perforation hole (101).

2. The top-feeding device according to claim 1, characterized in that: The top material structure (2) includes a top material frame (22) and a top material plate (21). The top material frame (22) includes a fixed frame (221) and a movable frame (222). The fixed frame (221) is fixedly mounted on the mounting plate (4). The fixed frame (221) is provided with a mounting hole (2211). An elastic element (23) is provided in the mounting hole (2211). The movable frame (222) is inserted into the mounting hole (2211) and presses against the elastic element (23). The fixed frame (221) supports the movable frame (222) through the elastic element (23). The top material plate (21) is located on the upper side of the movable frame (222).

3. The top-feeding device according to claim 2, characterized in that: The mounting hole (2211) passes through the fixed frame (221). The mounting plate (4) is provided with a rod hole (41) at the position corresponding to the mounting hole (2211). The lower end of the movable frame (222) is provided with a support rod (24). The elastic element (23) includes a spring (231). The lower end of the spring (231) is fixedly connected to the bottom of the fixed frame (221). The support rod (24) passes through the spring (231) and the rod hole (41). The support rod (24) is provided with a first limiting plate (241). The first limiting plate (241) is located below the rod hole (41). The first limiting plate (241) is used to restrict the support rod (24) from moving upward. The output end of the top material driving device (1) is also provided with a sensing plate (6). The sensing plate (6) is provided with a sensing structure (61) that is communicatively connected to the top material driving device (1). The sensing structure (61) is located on the lower side of the through-rod hole (41). When the support rod (24) touches the sensing structure (61), the top material driving device (1) stops lifting.

4. The top-feeding device according to claim 3, characterized in that: The support rod (24) is a screw (242), and the lower side of the movable frame (222) is provided with a screw hole. The screw (242) is screwed to the screw hole.

5. The top-feeding device according to claim 2, characterized in that: The top material structure (2) includes a baffle (25), which is fixed on the top material plate (21) and located on the side of the top material frame (22) away from the through hole support structure (3).

6. The top-feeding device according to claim 1, characterized in that: The top material driving device (1) includes a base (12) and a servo electric cylinder (11). The servo electric cylinder (11) is mounted on the base (12). The base (12) is provided with a longitudinally extending guide rail (121). The mounting plate (4) is provided with a connector (5). The connector (5) is provided with a slider (51). The connector (5) is slidably connected to the guide rail (121) through the slider (51).

7. The top-feeding device according to claim 1, characterized in that: The through-hole support structure (3) includes a support frame (31) and a support plate (32). The support frame (31) is disposed on the mounting plate (4), and the support plate (32) is disposed on the upper side of the support frame (31). An arc-shaped connecting surface (33) is provided between the upper side of the support plate (32) and the side near the top material structure (2).

8. A packaging machine, characterized in that: Includes the top material device as described in any one of claims 1 to 7.

9. The packaging machine according to claim 8, characterized in that: It also includes a frame on which a second limiting plate (70) is provided. The second limiting plate (70) is located directly above the top material structure (2) and is used to restrict the packaging box (60) from moving upward.

10. The packaging machine according to claim 8, characterized in that: It also includes a frame, on which a packaging table (10) and a film feeding device (20) are provided. The packaging table (10) is provided with a film-penetrating hole (101). The film feeding device (20) is used to transport the packaging film (50) above the film-penetrating hole (101) so that the packaging film (50) can pass through the film-penetrating hole (101). The through-hole support structure (3) is directly opposite the film-penetrating hole (101). When the packaging box (60) passes through the film-penetrating hole (101), the top material driving device (1) lifts the through-hole support structure (3) to its upper side and enters the film-penetrating hole (101) to support the packaging box (60).

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