A vertical packaging machine

Abstract

The utility model discloses a vertical packing machine solves the poor adaptability of existing equipment, low efficiency etc. problem, and this packing machine realizes the full process automation of feeding, opening box, edge folding, loading, sealing through modularization design, automatic operation and the flexible gripping to carton, reduces manual intervention, reduces the labor intensity, promotes the production efficiency of carton loading and packing, adapts the flexible production demand of many specifications carton, satisfies the packing demand of many industries. The utility model discloses a carton feeding assembly, the conveying frame for limiting paper box element, and the carton feeding assembly is arranged at the feed end of conveying frame, and the carton feeding assembly is installed with the feeding frame and the opening box adsorption subassembly, and the conveying frame is equipped with bottom edge folding subassembly, loading component and top edge folding subassembly, and the utility model discloses is applied to the automatic carton loading equipment technical field.

Description

Technical Field

[0001] This invention relates to the field of automated cartoning equipment technology, and in particular to a vertical packaging machine. Background Technology

[0002] Among existing automated packaging equipment, automated packaging machines generally suffer from problems such as poor adaptability, high cardboard box damage rate, and insufficient packaging stability: most machines can only adapt to a single specification of cardboard box, and the mechanical structure needs to be significantly adjusted when changing production, which is cumbersome and time-consuming; the automated box opening structure often uses a rigid clamping method, which can easily cause thin and brittle cardboard boxes to have indentations, tears or deformation, affecting the integrity of the packaging appearance.

[0003] The coordination between different processes in some parts of the general automated packaging machine is poor, and there are many manual interventions. This not only results in high labor intensity, but also low production efficiency and insufficient standardization of packaging, making it difficult to meet the needs of the food, pharmaceutical, cosmetic and other industries for packaging accuracy, stability and flexible production.

[0004] To address the aforementioned technical pain points, this utility model provides a vertical packaging machine. This packaging machine achieves full automation of the entire process of feeding, opening, folding, filling, and sealing through modular design, automated collaborative operation, and flexible gripping of paper boxes. This reduces manual intervention, lowers labor intensity, improves the production efficiency of paper box packaging, adapts to the flexible production needs of various paper box specifications, and meets the packaging needs of multiple industries. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a vertical packaging machine. Through modular design and automated collaborative operation, the packaging machine realizes full automation of feeding, opening, folding, filling and sealing, reduces manual intervention, lowers labor intensity, improves the production efficiency of paper box packaging, adapts to the flexible production needs of multiple specifications of paper boxes, and meets the packaging needs of multiple industries.

[0006] The technical solution adopted by this utility model to solve its technical problem is: This utility model provides a vertical packaging machine, which includes a paper box feeding assembly and a conveyor frame for limiting paper box elements. The paper box feeding assembly is located at the feeding end of the conveyor frame. The paper box feeding assembly is equipped with a feeding rack and a box opening suction assembly. The conveyor frame is provided with a bottom folding assembly, a filling assembly and a top folding assembly in sequence along the material conveying direction. Several unopened paper box elements are evenly limited on the feeding rack. The box opening suction assembly is used to open the paper box elements and transfer them to the initial working position of the conveyor frame. The bottom folding assembly is used to shape the bottom fold of the opened paper box elements. The filling assembly is used to quantitatively fill the material into the paper box. The top folding assembly is used to fold and seal the top of the opened paper box elements.

[0007] As described above, in a vertical packaging machine, the conveyor frame is provided with a plurality of positioning clamps for limiting the paper box elements. The plurality of positioning clamps are evenly spaced along the conveying direction of the conveyor frame. Each positioning clamp includes a fixed base and a plurality of symmetrically arranged elastic claws. Two sets of elastic claws are elastically connected to the fixed base. The spacing between the elastic claws is adapted to the width of the paper box elements after opening the box.

[0008] As described above, in a vertical packaging machine, the feeding rack includes a carton conveyor seat, the bottom of which is provided with a position adjustment seat, and the position adjustment seat is provided with an operating handwheel for adjusting the horizontal position of the carton conveyor seat. Both ends of the carton conveyor seat are provided with limit frames along the conveying direction, and the limit frames are used to limit the movement of several unopened carton components on both sides.

[0009] As described above, in a vertical packaging machine, the box-opening adsorption assembly includes a support base, on which a timing belt assembly, a driving component for driving the timing belt assembly to rotate, and a movable seat that slides on the timing belt assembly are provided. At the end of the movable seat, a plurality of paper box gripping elements are provided, which are used to grip unopened paper box elements.

[0010] As described above, in a vertical packaging machine, the bottom folding assembly includes several bottom pressing rods, a rotary push rod, and a pressing push head. The bottom pressing rods, the rotary push rod, and the pressing push head are all mounted on the conveyor frame. The bottom folding edge of the paper box element is divided into a bottom front end, a bottom left end, a bottom right end, and a bottom rear end. The bottom pressing rods are used to gradually bend the bottom left end, bottom front end, and bottom rear end of the paper box during transportation. The rotary push rods are used to bend the bottom right end of the paper box. The pressing push head is used to press and shape the bottom front end, bottom left end, bottom right end, and bottom rear end.

[0011] As described above, in a vertical packaging machine, the feeding assembly includes a hopper, a pushing assembly, and a material handling assembly. The hopper is used to store materials to be packaged. The pushing assembly is located at the discharge end of the material handling assembly and is used to control the amount of material fed at one time. The lower end of the discharge port of the pushing assembly is correspondingly arranged with the top opening of the carton element.

[0012] As described above, in a vertical packaging machine, the top folding assembly includes several top pressing rods, a rotating push rod, and a capping push block. The top pressing rods, the rotating push rod, and the capping push block are all mounted on the conveyor frame. The top folding edge of the paper box element is divided into a top front end, a top left end, a top right end, and a top rear end. The top pressing rods are used to gradually bend the top left end, top front end, and top rear end of the paper box during transportation. The rotating push rods are used to bend the top right end of the paper box. The capping push block is used to push the top front end and the top rear end to engage in a snap-fit ​​limiting action.

[0013] In the vertical packaging machine described above, the cardboard box gripping element is a vacuum suction cup, which is connected to an external vacuum pump via an air pipe, and the suction surface of the vacuum suction cup is adsorbed and engaged with the side of the unopened cardboard box element.

[0014] In the vertical packaging machine described above, the cardboard box gripping element is a pressure-sensitive adhesive, and the adhesive surface of the pressure-sensitive adhesive can be detachably adsorbed onto the side of the unopened cardboard box element.

[0015] As described above, in a vertical packaging machine, the inner side of the elastic gripper is provided with a flexible protective pad, which is a rubber pad or a silicone pad, to avoid damaging the outer wall of the cardboard box component.

[0016] The beneficial effects of this utility model are as follows: Through modular design and automated collaborative operation, this utility model significantly improves the production efficiency and standardization of cardboard packaging, adapts to the flexible production needs of cardboard boxes of various specifications, and adopts a flexible gripping method using vacuum suction cups or pressure-sensitive adhesive, combined with a flexible protective pad design of elastic claws, to avoid cardboard box pinching, scratching or deformation throughout the process, ensuring the integrity of the packaging appearance. The step-by-step bending and pressing and shaping of the bottom folding component, and the snap-locking structure of the top folding component, ensure that the cardboard box is firmly sealed and has stable load-bearing capacity, effectively preventing material leakage after filling or loosening of the box during transportation.

[0017] The modular components and conveyor frame work in precise coordination to automate the entire process of feeding, opening, folding, filling and sealing, reducing manual intervention and labor intensity. At the same time, the simple structure makes it easy to maintain, and the stable and reliable operation makes it suitable for the packaging needs of multiple industries such as food, pharmaceuticals and cosmetics. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a first structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the second structure of the present invention; Figure 3 This is a schematic diagram of the first structure of the conveyor frame; Figure 4 This is a structural diagram of the loading rack; Figure 5 This is a schematic diagram of the second structure of the conveyor frame; Figure 6 This is a schematic diagram of the third structure of the conveyor frame; Figure 7 This is a schematic diagram of the structure of the box-opening adsorption component; Figure 8 This is a schematic diagram of the first structure of the box-opening adsorption component; Figure 9 This is a schematic diagram of the second structure of the box-opening adsorption component; Figure 10 This is a first structural schematic diagram of the cardboard box components; Figure 11 This is a schematic diagram of the first structure of the paper box component. Detailed Implementation

[0021] 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.

[0022] like Figure 1 and Figure 11As shown, in this embodiment, the present invention includes a paper box feeding assembly 1 and a conveyor frame 3 for limiting the paper box elements 2. The paper box feeding assembly 1 is disposed at the feeding end of the conveyor frame 3. The paper box feeding assembly 1 is equipped with a feeding rack 10 and a box opening adsorption assembly 11. The conveyor frame 3 is provided with a bottom folding assembly 4, a filling assembly 5 and a top folding assembly 6 in sequence along the material conveying direction. Several unopened paper box elements 2 are evenly limited on the feeding rack 10. The box opening adsorption assembly 11 is used to open the paper box elements 2 and transfer them to the initial working position of the conveyor frame 3. The bottom folding assembly 4 is used to shape the bottom fold of the opened paper box elements 2. The filling assembly 5 is used to quantitatively fill the material into the paper box. The top folding assembly 6 is used to fold and seal the top of the opened paper box elements 2. Therefore, the cardboard box feeding component 1 includes a feeding rack 10 and an opening and closing suction component 11. The feeding rack 10 carries and stores unopened cardboard boxes, providing a stable material supply. The opening and closing suction component 11 opens the flat cardboard box into a three-dimensional state and transports it to the conveyor rack 3. The conveyor rack 3 accurately positions the opened cardboard box and transports it to each processing station. The bottom folding component 4 folds and fixes the bottom of the opened cardboard box, providing support for the subsequent filling station. The filling component 5 accurately and quantitatively fills several portions of material into the formed cardboard box. The top folding component 6 folds the top of the opened cardboard box and seals it through methods such as gluing and extrusion. This utility model automates the process by following the feeding → opening → positioning → bottom fixing → filling → top sealing process, ensuring smooth operation and thus achieving efficient and automated conversion from flat cardboard boxes to finished packaging.

[0023] Furthermore, in this embodiment, the conveyor frame 3 is provided with a plurality of positioning fixtures for limiting the position of the paper box element 2. These positioning fixtures are evenly spaced along the conveying direction of the conveyor frame. Each positioning fixture includes a fixed base 30 and multiple sets of symmetrically arranged elastic grippers 31. Two sets of elastic grippers 31 are elastically connected to the fixed base 30, and the distance between the elastic grippers 31 is adapted to the width of the paper box element 2 after opening. Thus, the conveyor frame 3 serves to mount the fixed base 30, and the fixed base 30 serves to limit the installation of the elastic grippers 31. The grippers are mirror-distributed, providing stable and uniform clamping force to both sides of the paper box. Furthermore, the distance between the elastic grippers 31 and the fixed base 30 can be adjusted, enabling clamping and positioning of paper box products of different specifications, making it suitable for high-speed automated packaging production lines.

[0024] Furthermore, in this embodiment, the feeding rack 10 includes a paper box conveying seat 100. The bottom of the paper box conveying seat 100 is provided with a position adjustment seat 101. The position adjustment seat 101 is provided with an operating handwheel for adjusting the horizontal position of the paper box conveying seat 100. Both ends of the paper box conveying seat 100 are provided with limiting frames 102 along the conveying direction. The limiting frames 102 are used to limit the sides of several unopened paper box elements 2. Therefore, the paper box conveyor 100 serves to carry and transport several unopened paper boxes. It precisely docks with the opening adsorption component 11 to achieve stable transfer of the paper boxes. The position adjustment seat 101 provides horizontal position adjustment for the paper box conveyor 100. Through precise adjustment, it ensures that the positions of the paper box conveyor 100 and the opening adsorption component 11 are relatively accurate. The operating handwheel provides manual adjustment of the position of the paper box conveyor 100. The limiting frame 102 is set at the left and right ends of the paper box conveyor 100 to limit the paper boxes stacked on the paper box conveyor 100 on both sides and prevent the paper boxes from shifting or tipping over during the conveying process.

[0025] Furthermore, in this embodiment, the box-opening adsorption assembly 11 includes a support base 110, on which a timing belt assembly 111, a driving component 112 for driving the timing belt assembly 111 to rotate, and a movable seat 113 that slides on the timing belt assembly 111 are provided. At the end of the movable seat 113, a plurality of paper box gripping elements 114 are provided, which are used to grip unopened paper box elements 2. Therefore, the support base 110 serves to install and fix the synchronous belt assembly 11, the drive component 112, and the movable base 113. The synchronous belt assembly 111 transmits power to the drive component 112 and drives the movable base 113 to reciprocate linearly along the trajectory. The drive component 112 provides stable power to the synchronous belt assembly 111. The movable base 113 supports and fixes the cardboard box gripping element 114. The cardboard box gripping element 114 grips the unopened cardboard box and, in conjunction with the movement of the movable base 113, drives the flat cardboard box to complete the opening action, and clamps the opened cardboard box to the initial position of the conveyor frame 3.

[0026] Furthermore, in this embodiment, the bottom folding assembly 4 includes several bottom pressing rods 40, rotary push rods 41, and pressing push heads 42. The bottom pressing rods 40, rotary push rods 41, and pressing push heads 42 are all mounted on the conveyor frame 3. The bottom folding edge of the paper box element 2 is divided into a bottom front end 21, a bottom left end 22, a bottom right end 23, and a bottom rear end 24. The bottom pressing rods 40 are used to gradually bend the bottom left end 22, bottom front end 21, and bottom rear end 24 of the paper box during transportation. The rotary push rods 41 are used to bend the bottom right end 23 of the paper box. The pressing push heads 42 are used to press and shape the bottom front end 21, bottom left end 22, bottom right end 23, and bottom rear end 24. As can be seen, the bottom pressing rod 40, as the paper box element 2 is conveyed, sequentially bends the bottom left end 22, bottom front end 21, and bottom rear end 24 of the paper box element 2, thus laying the foundation for subsequent pressing and shaping. The rotary push rod 31 bends the bottom right end 23 of the paper box element 2, and then bends the next paper box element 2 through rotary rhythm. The pressing push head 42 applies uniform pressure to the bottom front end 21, bottom left end 22, bottom right end 23, and bottom rear end 24, completely pressing the folded edge against the bottom of the paper box, overcoming the paper's springback characteristics, and adding adhesive to ensure the folded edge is firmly shaped.

[0027] Furthermore, in this embodiment, the loading component 5 includes a hopper, a pushing component 50, and a material handling component 51. The hopper stores the material to be packaged. The pushing component 50 is located at the discharge end of the material handling component 51 and controls the amount of material discharged at one time. The lower end of the discharge port of the pushing component 50 corresponds to the top opening of the cardboard box element 2. Thus, the hopper stores the material, providing a stable supply for continuous production. The material handling component 51 connects the hopper and the pushing component 50, and evenly transports the material to the pushing component 50. The pushing component 50 pushes the material into the cardboard box through a rhythmic, intermittent motion, precisely controlling the amount of material discharged at one time and ensuring that the weight of each box is almost uniform. The discharge port has a trumpet-shaped structure, with its lower end precisely aligned with the upper end of the cardboard box, achieving efficient, stable, and clean loading operations.

[0028] Furthermore, in this embodiment, the top folding assembly 6 includes several top pressing rods 60, rotating push rods 61, and pressure cover push blocks 62. The top pressing rods 60, rotating push rods 61, and pressure cover push blocks 62 are all mounted on the conveyor frame 3. The top folding edge of the paper box element 2 is divided into a top front end 25, a top left end 26, a top right end 27, and a top rear end 28. The top pressing rods 60 are used to gradually bend the top left end 26, top front end 25, and top rear end 28 of the paper box during transportation. The rotating push rods 61 are used to bend the top right end 27 of the paper box. The pressure cover push blocks 62 are used to push the top front end 25 and the top rear end 28 to engage in a snap-fit ​​limiting cooperation. As can be seen, the top pressing rod 60 is fed into the carton component 2 and sequentially bends its top left end 26, top front end 25, and top rear end 28, folding the carton's edge from a vertical position to a near-horizontal position. The rotating push rod 61 is specifically designed to precisely bend the top right end 27, serving as a supplementary bending function. The pressing cover push block 62 aligns the top front end 25 with the top rear end to form a secure locking structure, preventing material spillage. This is particularly suitable for products such as food and medicine that require hygienic sealing. The snap-locking mechanism also facilitates disassembly during subsequent use.

[0029] Furthermore, in this embodiment, the cardboard box gripping element 114 is a vacuum suction cup. The vacuum suction cup is connected to an external vacuum pump via an air pipe, and the suction surface of the vacuum suction cup adheres to the side of the unopened cardboard box element 2. Thus, the cardboard box gripping element 114, being a vacuum suction cup, distributes its vacuum force evenly along the side of the cardboard box, preventing point contact by mechanical grippers from causing indentations, tears, or deformation, protecting the appearance and structural integrity of the cardboard box. Moreover, the vacuum suction cup structure is highly adaptable; by adjusting the position and angle of the mounting bracket, it can accommodate cardboard boxes of different widths.

[0030] Optionally, in this embodiment, the cardboard box gripping element 114 is a pressure-sensitive adhesive, and the adhesive surface of the pressure-sensitive adhesive is detachably adsorbed onto the side of the unopened cardboard box element 2. Thus, the pressure-sensitive adhesive has the characteristics of easy adhesion with light pressure and easy detachment upon peeling, making it particularly suitable for thin, brittle unopened cardboard boxes whose surfaces are not suitable for vacuum adsorption. Furthermore, its simple structure eliminates the need for supporting components such as air tubes, vacuum pumps, and pressure sensors, and also avoids indentations, tears, or deformation caused by point contact of mechanical grippers, protecting the appearance and structural integrity of the cardboard box.

[0031] Optionally, in this embodiment, a flexible protective pad is provided on the inner side of the elastic gripper 31. The flexible protective pad is a rubber pad or a silicone pad, used to prevent damage to the outer wall of the cardboard box element 2. Thus, the elastic gripper 31 provides support and fixation for the flexible protective pad, and the flexible protective pad disperses the clamping force through its own deformation, preventing excessive local pressure from the elastic gripper 31 that could cause dents, indentations, or tears in the side wall of the cardboard box.

[0032] The working principle of this utility model is as follows: Unopened cardboard box components 2 are neatly positioned on the feeding rack 10. The position adjustment seat 101 and the operating handwheel are used to calibrate the position of the cardboard box conveyor 100 to ensure precise docking with the box opening adsorption component 11. The drive unit 112 drives the synchronous belt assembly 111 to operate. The moving seat 113 carries a vacuum suction cup (or pressure-sensitive adhesive) to adhere to the side of the carton, and after completing the opening action, it is transferred to the positioning fixture of the conveyor frame 3. The flexible protective pad on the inner side of the elastic gripper 31 holds the carton and transports it stably. During the conveying process, the bottom folding assembly 4 first bends the bottom left end 22, bottom front end 21 and bottom rear end 24 in steps by the bottom pressing rod 40, and the rotary push rod 41 folds the bottom right end 23. Then, it is pressed and shaped by the pressing push head 42. Subsequently, the hopper of the loading assembly 5 is fed by the material handling assembly 51, and the pushing assembly 50 quantitatively feeds the material into the carton. Finally, the top pressing rod 60 of the top folding assembly 6 pre-folds the top left end 26, top front end 25 and top rear end 28, the rotating push rod 61 bends the top right end 27, and the pressing cover push block 62 pushes the top front end and top rear end to lock together, completing the entire automated paper box packaging process.

[0033] It should be understood that the terms "first," "second," etc., are used in this utility model to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this utility model, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information. In addition, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] The above embodiments do not limit the scope of protection of this utility model. All equivalent modifications and variations made by those skilled in the art without departing from the overall concept of this utility model shall still fall within the scope of this utility model.

Claims

1. A vertical packaging machine, characterized in that, It includes a paper box feeding assembly (1) and a conveyor frame (3) for limiting the paper box elements (2). The paper box feeding assembly (1) is set at the feeding end of the conveyor frame (3). The paper box feeding assembly (1) is equipped with a feeding rack (10) and a box opening adsorption assembly (11). The conveyor frame (3) is provided with a bottom folding assembly (4), a loading assembly (5) and a top folding assembly (6) in sequence along the material conveying direction. Several unopened paper box elements (2) are evenly limited on the feeding rack (10). The box opening adsorption assembly (11) is used to open the paper box elements (2) and transfer them to the initial working position of the conveyor frame (3). The bottom folding assembly (4) is used to shape the bottom fold of the paper box elements (2) after opening. The loading assembly (5) is used to quantitatively load the material into the paper box. The top folding assembly (6) is used to fold and seal the top of the paper box elements (2) after opening.

2. A vertical packaging machine according to claim 1, characterized in that, The conveyor frame (3) is provided with a number of positioning fixtures for limiting the paper box element (2). The positioning fixtures are evenly spaced along the conveying direction of the conveyor frame. The positioning fixture includes a fixed base (30) and multiple sets of symmetrically arranged elastic claws (31). Two sets of elastic claws (31) are elastically connected to the fixed base (30). The distance between the elastic claws (31) is adapted to the width of the paper box element (2) after opening the box.

3. A vertical packaging machine according to claim 1, characterized in that, The feeding rack (10) includes a paper box conveyor (100). The bottom of the paper box conveyor (100) is provided with a position adjustment seat (101). The position adjustment seat (101) is provided with an operating handwheel for adjusting the horizontal position of the paper box conveyor (100). Both ends of the paper box conveyor (100) are provided with limit frames (102) along the conveying direction. The limit frames (102) are used to limit the sides of several unopened paper box elements (2).

4. A vertical packaging machine according to claim 1, characterized in that, The box opening adsorption assembly (11) includes a support base (110), on which a timing belt assembly (111), a driving component (112) for driving the timing belt assembly (111) to rotate, and a movable seat (113) that slides on the timing belt assembly (111) are provided. At the end of the movable seat (113) are a plurality of paper box gripping elements (114), which are used to grip unopened paper box elements (2).

5. A vertical packaging machine according to claim 1, characterized in that, The bottom folding assembly (4) includes several bottom pressing rods (40), rotary push rods (41) and pressing push heads (42). The bottom pressing rods (40), rotary push rods (41) and pressing push heads (42) are all installed on the conveyor frame (3). The bottom folding of the paper box element (2) is divided into bottom front end (21), bottom left end (22), bottom right end (23) and bottom rear end (24). The bottom pressing rods (40) are used to gradually bend the bottom left end (22), bottom front end (21) and bottom rear end (24) of the paper box during transportation. The rotary push rods (41) are used to bend the bottom right end (23) of the paper box. The pressing push heads (42) are used to press and shape the bottom front end (21), bottom left end (22), bottom right end (23) and bottom rear end (24).

6. A vertical packaging machine according to claim 1, characterized in that, The loading assembly (5) includes a hopper, a pushing assembly (50), and a material handling assembly (51). The hopper is used to store materials to be packaged. The pushing assembly (50) is located at the discharge end of the material handling assembly (51) and is used to control the amount of material discharged at one time. The lower end of the discharge port of the pushing assembly (50) is corresponding to the top opening of the paper box element (2).

7. A vertical packaging machine according to claim 1, characterized in that, The top edge assembly (6) includes several top edge pressing rods (60), rotating push rods (61) and pressure cover push blocks (62). The top edge pressing rods (60), rotating push rods (61) and pressure cover push blocks (62) are all installed on the conveyor frame (3). The top edge of the paper box element (2) is divided into a top front end (25), a top left end (26), a top right end (27) and a top rear end (28). The top edge pressing rods (60) are used to gradually bend the top left end (26), top front end (25) and top rear end (28) of the paper box during transportation. The rotating push rods (61) are used to bend the top right end (27) of the paper box. The pressure cover push blocks (62) are used to push the top front end (25) and the top rear end (28) to engage in a snap-fit ​​limiting cooperation.

8. A vertical packaging machine according to claim 4, characterized in that, The cardboard box gripping element (114) is a vacuum suction cup. The vacuum suction cup is connected to an external vacuum pump through an air pipe. The suction surface of the vacuum suction cup is adsorbed and engaged with the side of the unopened cardboard box element (2).

9. A vertical packaging machine according to claim 4, characterized in that, The cardboard box gripping element (114) is a pressure-sensitive adhesive, and the adhesive surface of the pressure-sensitive adhesive can be detachably adsorbed and engaged with the side of the unopened cardboard box element (2).

10. A vertical packaging machine according to claim 2, characterized in that, The inner side of the elastic gripper (31) is provided with a flexible protective pad, which is a rubber pad or a silicone pad, to avoid damaging the outer wall of the cardboard box element (2).

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