A flap pushing mechanism for a packaging machine

Abstract

The application discloses a folding plate pushing mechanism for a packaging machine and relates to the technical field of folding plates of packaging machines. The folding plate pushing mechanism comprises a packaging machine shell, the inner wall of the packaging machine shell is symmetrically and fixedly connected with slide rails in a vertical shape and limiting the moving direction, the surfaces of the two slide rails are slidably connected with sliding blocks, the surfaces of the two sliding blocks are fixedly connected with a horizontal rod on one side, the inner wall of the packaging machine shell is fixedly connected with a backboard, and the outer part of the horizontal rod is provided with a folding plate two which is slidably connected in the inner part of the backboard. After the sliding blocks and the slide rails are used to replace the swing arm, the motion track of the folding plate two is strictly limited to the vertical direction, especially suitable for the up-and-down folding scene of high boxes, the film layer dislocation or wrinkles caused by the deviation of the folding plate two is avoided, the folding plate two is driven to move by rotating the threaded rod and driving the sliding rod, stepless adjustment of the height and the working position of the folding plate two is realized, different height packaging boxes can be quickly adapted, parts do not need to be replaced or complicated debugging, and the universality of the equipment is improved.

Description

Technical Field

[0001] This application relates to the field of folding plate technology for packaging machines, and in particular to a folding plate pushing mechanism for packaging machines. Background Technology

[0002] In packaging machines, the folding and pushing mechanism is a key component for folding the plastic film of the packaging box in half vertically, and its operational stability directly affects the packaging quality.

[0003] Traditional folding plates achieve vertical movement through a swing arm drive. However, the swing arm generates a horizontal oscillation component during rotation, causing the folding plate's movement trajectory to deviate from the vertical direction. This is especially problematic when packaging tall boxes, where the increased swing arm length amplifies the offset, resulting in uneven or misaligned folds of the plastic film, and even damage to the film structure. Furthermore, the folding plate lacks height adjustment functionality or uses a bolt-locking structure, requiring manual disassembly and adjustment. This makes it difficult to quickly adapt to packaging boxes of different heights. When the box height changes, the machine must be stopped for adjustments. Due to the folding plate's movement offset and the lack of height adjustment, wrinkles, bubbles, or loose adhesion easily occur after the plastic film is folded. Utility Model Content

[0004] To address the issues of easy folding plate deviation and non-adjustable height, this application provides a folding plate pushing mechanism for a packaging machine.

[0005] The folding plate pushing mechanism for a packaging machine provided in this application adopts the following technical solution:

[0006] A folding plate pushing mechanism for a packaging machine includes a packaging machine housing. The inner wall of the packaging machine housing is symmetrically and fixedly connected with vertical slide rails that restrict the direction of movement. Slider blocks are slidably connected to the surfaces of the two slide rails. A crossbar is fixedly connected to one side of the surface of the two slide rails. A back support plate is fixedly connected to the inner wall of the packaging machine housing. A second folding plate is provided outside the crossbar and slidably connected to the inside of the back support plate.

[0007] By adopting the above technical solution, the vertical lifting and lowering movement of the folding plate is realized through the cooperation of the slide rail and the slider, which completely eliminates the horizontal offset and sway of the traditional swing arm mechanism, ensuring that the plastic film is accurately aligned when folded. It is especially suitable for high box scenarios, reducing the film layer misalignment rate and significantly improving packaging quality.

[0008] Preferably, a first folding plate is fixedly connected to one side of the surface of the crossbar, and a sliding rod that slides through and is slidably connected to the first folding plate and the interior of the crossbar is symmetrically fixed to one side of the surface of the second folding plate.

[0009] By adopting the above technical solution, the crossbar serves as the core connecting component, simultaneously driving the first and second folding plates to achieve synchronous movement. This ensures that the pressure of the folding plates on the film layer is evenly distributed, avoiding wrinkles or bubbles in the film layer and improving the appearance qualification rate of the packaging box.

[0010] Preferably, the crossbar is internally symmetrically threaded with a threaded rod for adjusting the height of the second folding plate. The surface of the threaded rod is provided with an annular groove, and the surface of the annular groove is rotatably connected to an elliptical plate that is fixedly connected to the surface of the slide bar.

[0011] By adopting the above technical solution, the sliding rod is driven by the rotating threaded rod to raise and lower the folding plate, thereby achieving stepless adjustment of the folding plate height and working position. The adjustment accuracy is high, it is suitable for packaging boxes of different heights, and there is no need to stop the machine for disassembly, which improves the versatility of the equipment and increases production efficiency.

[0012] Preferably, a connecting rod is hinged inside the crossbar, a rotating plate is hinged to the end of the connecting rod away from the crossbar, and a fixed seat that is fixedly connected to the inner wall of the packaging machine housing is hinged to the end of the rotating plate away from the connecting rod.

[0013] By adopting the above technical solution, the connecting rod and the rotating plate convert the rotational motion of the main shaft into the vertical motion of the folding plate. The structure is compact and the transmission efficiency is high, reducing energy loss, while also reducing equipment noise and improving operational stability.

[0014] Preferably, a main shaft is rotatably connected through the interior of the packaging machine housing, and a cam is fixedly connected to the surface of the main shaft.

[0015] By adopting the above technical solution, a cam is used to control the up and down rotation of the turntable.

[0016] Preferably, the surface of the cam is provided with a groove, and a round shaft that is fixedly connected to one side of the rotating plate surface is slidably connected inside the groove.

[0017] By adopting the above technical solution, grooves are opened on the surface of the cam, and it is connected to the rotating plate through a round shaft to achieve precise control of the movement trajectory and speed of the folding plate.

[0018] Preferably, a servo motor and a reducer are fixedly connected to the inner wall of the packaging machine housing, and the servo motor and the reducer are connected by a pulley for transmission.

[0019] By adopting the above technical solutions, the servo motor provides high-precision speed control, the reducer reduces the speed and increases the torque, ensuring that the folding plate pushing mechanism runs smoothly and the speed is adjustable to meet different packaging speed requirements, while reducing the motor load.

[0020] Preferably, the output end of the reducer is fixedly connected to a sprocket one, the sprocket one is externally meshed with a chain, and the end of the chain away from the sprocket one is internally meshed with a sprocket two that is fixedly connected to the surface of the main shaft.

[0021] By adopting the above technical solution, power is transmitted from the reducer to the main shaft through chain drive. The transmission ratio is accurate and the efficiency is high. In addition, the chain has a certain degree of elasticity, which can absorb some vibration and improve the stability of equipment operation.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By using a slider and slide rail to replace the swing arm, the movement trajectory of the second folding plate is strictly limited to the vertical direction, completely eliminating the left and right offset and swaying phenomenon of the traditional swing arm, ensuring precise positioning of the folding action, especially suitable for the vertical folding scenario of tall boxes, avoiding film layer misalignment or wrinkles caused by the offset of the second folding plate.

[0024] 2. By rotating the threaded rod to drive the slide bar, the second folding plate can be moved, achieving stepless adjustment of the height and working position of the second folding plate. It can quickly adapt to packaging boxes of different heights without the need to replace parts or perform complex adjustments, thus improving the equipment's versatility.

[0025] 3. The straight up-and-down movement combined with height adjustment makes the pressure distribution of the film layer on the second fold plate more uniform. After the film layer is folded, there are no wrinkles or bubbles, the appearance of the packaging box is flatter, and the defect rate is reduced. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the packaging machine of this application;

[0027] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle;

[0028] Figure 3 This is a side view of the overall structure of this application;

[0029] Figure 4 This is a schematic diagram of the positional structure of the second folding plate in this application;

[0030] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0031] Figure 6 This is a schematic diagram of the threaded rod position structure in this application.

[0032] Reference numerals in the attached diagram: 1. Packaging machine housing; 2. Servo motor; 3. Reducer; 4. Sprocket 1; 5. Chain; 6. Main shaft; 7. Sprocket 2; 8. Fixed base; 9. Rotary plate; 10. Round shaft; 11. Connecting rod;

[0033] 12. Cam; 13. Groove; 14. Crossbar; 15. Backrest plate; 16. Slider; 17. Slide rail; 18. Folding plate one; 19. Folding plate two; 20. Slide rod; 21. Threaded rod; 22. Circular groove; 23. Elliptical plate. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0035] This application discloses a folding plate pushing mechanism for a packaging machine.

[0036] Reference Figure 2 , Figure 3 A folding and pushing mechanism for a packaging machine includes a packaging machine housing 1. The inner walls of the packaging machine housing 1 are fixed to the surfaces of two slide rails 17 that are far apart from each other. The two slide rails 17 are symmetrically arranged and vertical, restricting the movement direction of the second folding plate 19. The surfaces of both slide rails 17 are slidably connected to the inner side of a slider 16, and there is no gap between the slider 16 and the slide rails 17. There is no offset during the sliding of the slider 16. The sides of the two sliders 16 that are close to each other are fixed to the surfaces at both ends of a crossbar 14. The middle of the inner wall of the packaging machine housing 1 is fixed to the outer surface of a backrest plate 15. A second folding plate 19 is provided at the top of the crossbar 14, penetrating the middle of the backrest plate 15 and slidably connected. The cooperation between the slider 16 and the slide rails 17 has high rigidity and strong resistance to lateral forces. Even under high load or high speed, the movement of the second folding plate 19 remains stable, significantly improving folding consistency.

[0037] When the packaging machine is in use, the plastic film surrounding the surface of the packaging box is folded up and down by the second folding plate 19, so that the plastic film fits the packaged item. The second folding plate 19 moves inside the back plate 15 by the movement of the crossbar 14. When the crossbar 14 moves, it drives the two sliders 16 to slide on the slide rail 17. The use of sliders 16 and slide rail 17 strictly limits the movement trajectory of the second folding plate 19 to the vertical direction, completely eliminating the left and right offset and swaying phenomenon of traditional swing arms, and ensuring precise positioning of the folding action. A spring is fixed between the bottom surface of slider 16 and the bottom of the back plate 15 for resetting so that the round shaft 10 automatically positions itself in the groove 13.

[0038] Reference Figure 5 , Figure 6 The outer side of the crossbar 14 is fixed to the outer surface of the first folding plate 18. The first folding plate 18 is located directly below the second folding plate 19. The lower surface of the second folding plate 19 is fixed to the top of the two sliding rods 20. The two sliding rods 20 are symmetrically arranged at the bottom of the second folding plate 19. The middle part of the sliding rod 20 passes through the upper and lower ends of the first folding plate 18. The outer wall of the sliding rod 20 slides against the inner wall of the first folding plate 18. The bottom of the crossbar 14 is threadedly connected to the threaded rod 21. The threaded rod 21 is used to adjust the height of the second folding plate 19. A circular groove 22 is opened on the outer surface of the bottom end of the threaded rod 21. The inner wall of the circular groove 22 is rotatably connected to the inner wall of the elliptical plate 23. The inner wall of the elliptical plate 23 is adapted to the inner wall of the circular groove 22 without gaps. The upper surface of the end of the elliptical plate 23 away from the circular groove 22 is fixed to the bottom end of the sliding rod 20.

[0039] When the height of the packaging box changes, the operator rotates the threaded rod 21. The rotation of the threaded rod 21, through the use of the annular groove 22 and the elliptical plate 23, ensures that the rotation of the annular groove 22 does not affect the rotation of the elliptical plate 23 and the sliding rod 20. The threaded rod 21 moves while rotating, and the size limitation of the annular groove 22 and the elliptical plate 23 causes the sliding rod 20 to move inside the first folding plate 18. The movement of the sliding rod 20 causes the second folding plate 19 to move, adjusting the height to accommodate packaging boxes of different heights. No machine shutdown or disassembly is required, improving the equipment's versatility. The thread pitch of the threaded rod 21 can be selected as 4mm, allowing for a 4mm adjustment with each turn of the handwheel, ensuring efficiency and facilitating fine-tuning. Before each use, the threaded rod 21 must be checked for looseness to prevent the second folding plate 19 from shifting during use.

[0040] Reference Figure 2 , Figure 4 The bottom middle of the crossbar 14 is hinged to the top of the connecting rod 11. The bottom of the connecting rod 11 is hinged to one end of the rotating plate 9. The rotating plate 9 is located at the end of the connecting rod 11 away from the crossbar 14. The other end of the rotating plate 9 is hinged to the middle of the fixed seat 8. The fixed seat 8 is located at the end of the rotating plate 9 away from the connecting rod 11. The bottom of the fixed seat 8 is fixed to the bottom of the inner wall of the packaging machine housing 1 by bolts. The interior of the packaging machine housing 1 is rotatably connected to both ends of the main shaft 6. The outer surface of the main shaft 6 is fixed to the inner side of the cam 12. The cam 12 is located in the middle of the main shaft 6. The surface of the cam 12 has a groove 13. The groove 13 penetrates the interior of the cam 12. The inner wall of the groove 13 slides against the outer wall of the round shaft 10. The size of the round shaft 10 is adapted to the size of the groove 13. The fixed end of the round shaft 10 is fixed to the surface of the rotating plate 9.

[0041] In the initial state, the round shaft 10 is located at the higher position on both sides of the groove 13. The rotation of the main shaft 6 drives the cam 12 to rotate. The rotation of the cam 12 causes the round shaft 10 to enter the interior of the groove 13. The distance difference between the groove 13 and the two sides causes the round shaft 10 to drive the rotating plate 9 to deflect. When the rotating plate 9 rotates, it drives the connecting rod 11 to move. When the connecting rod 11 moves, it drives the crossbar 14 to move. When the crossbar 14 moves, it drives the slider 16 to slide inside the slide rail 17. The movement of the crossbar 14 drives the folding plate 19 to move up and down through the slide rod 20 to fold the plastic film upward.

[0042] Reference Figure 1 , Figure 2 The bottom of the inner wall of the packaging machine housing 1 is installed with the fixed end of the servo motor 2 and the reducer 3. The output end of the servo motor 2 is connected to the input end of the reducer 3 through a belt pulley drive. The output end of the reducer 3 is fixed to the center of the first sprocket 4. The outer surface of the main shaft 6 is fixed to the inner side of the second sprocket 7. The outer side of the first sprocket 4 and the outer side of the second sprocket 7 are respectively engaged with the two ends of the chain 5.

[0043] In use, the packaging machine housing 1 starts the drive reducer 3 to rotate. The rotation of the reducer 3 drives the first sprocket 4 to rotate. The rotation of the first sprocket 4 drives the second sprocket 7 to rotate through the chain 5. The rotation of the second sprocket 7 drives the main shaft 6 to rotate. The rotation of the main shaft 6 drives the cam 12 to rotate. When the cam 12 rotates, it causes the round shaft 10 to enter the groove 13, thereby realizing the rotation of the rotating plate 9.

[0044] The servo motor 2 and the reducer 3 are both existing technologies, and their structural principles will not be elaborated here. The servo motor 2 can be a Xinje MS5G series servo motor 2, and the reducer 3 can be a WP series worm gear reducer 3. The power line of the servo motor 2 is connected to the input terminal of the driver built into the reducer 3. The output terminal of the driver is mechanically connected to the input shaft of the reducer 3 through a coupling. At the same time, the encoder signal line of the servo motor 2 is fed back to the driver to form a closed-loop control. When starting, the packaging machine control system first supplies power to the driver. The driver is enabled by a preset program or an external input signal (such as a PLC instruction). The driver adjusts the output current and frequency in real time according to the encoder feedback, driving the servo motor 2 to rotate at a set speed. Then, the speed is reduced and the torque is increased through the reducer 3. Finally, the main shaft 6 and the cam 12 are driven by the sprocket and chain drive to achieve precise driving of the folding plate pushing mechanism.

[0045] The implementation principle of the folding plate pushing mechanism for a packaging machine according to this application embodiment is as follows: By starting the servo motor 2, the servo motor 2 drives the cam 12 to rotate through the transmission of the reducer 3, sprocket 1 4, chain 5, main shaft 6 and sprocket 2 7. The rotation of the cam 12 and the groove 13 control the up and down rotation of the rotating plate 9, thereby realizing that the connecting rod 11 drives the crossbar 14 to move up and down. The up and down movement of the crossbar 14 drives the slider 16 to slide inside the slide rail 17. After replacing the swing arm with the slider 16 and the slide rail 17, the movement trajectory of the folding plate 2 19 is strictly limited to the vertical direction, completely eliminating the left and right offset and swaying phenomenon of the traditional swing arm, ensuring accurate positioning of the folding action, especially suitable for the up and down folding scenario of tall boxes, avoiding film layer misalignment or wrinkles caused by the offset of the folding plate 2 19.

[0046] When the height of the packaging box changes, the operator rotates the threaded rod 21, which drives the slide rod 20 to move the second folding plate 19, thus achieving stepless adjustment of the height and working position of the second folding plate 19. This allows for quick adaptation to packaging boxes of different heights without the need to replace parts or perform complex adjustments, improving the equipment's versatility. Through the straight up-and-down movement combined with height adjustment, the pressure distribution of the second folding plate 19 on the film layer becomes more uniform, resulting in no wrinkles or bubbles after the film layer is folded, improving the flatness of the packaging box's appearance and reducing the defect rate.

[0047] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flap pushing mechanism for a packaging machine, characterized in that: The packaging machine includes a housing (1), and the inner wall of the housing (1) is symmetrically fixedly connected with vertical slide rails (17) that restrict the direction of movement. The surfaces of the two slide rails (17) are slidably connected with sliders (16). A crossbar (14) is fixedly connected to one side of the surface of the two sliders (16). The inner wall of the packaging machine housing (1) is fixedly connected with a back panel plate (15). The crossbar (14) is provided with a folding plate (19) that penetrates and is slidably connected to the inside of the back panel plate (15).

2. A flap pushing mechanism for a packaging machine according to claim 1, characterized in that: A first folding plate (18) is fixedly connected to one side of the surface of the crossbar (14), and a sliding rod (20) is symmetrically fixedly connected to one side of the surface of the second folding plate (19), which is slidably connected through the first folding plate (18) and the crossbar (14).

3. The folding plate pushing mechanism for a packaging machine according to claim 1, characterized in that: The crossbar (14) is internally symmetrically threaded with a threaded rod (21) for adjusting the height of the second folding plate (19). The surface of the threaded rod (21) is provided with an annular groove (22). The surface of the annular groove (22) is rotatably connected to an elliptical plate (23) that is fixedly connected to the surface of the slide bar (20).

4. A flap pushing mechanism for a packaging machine according to claim 2, characterized in that: The crossbar (14) is internally hinged to a connecting rod (11), and a rotating plate (9) is hinged to the end of the connecting rod (11) away from the crossbar (14). The rotating plate (9) is hinged to a fixed seat (8) that is fixedly connected to the inner wall of the packaging machine housing (1) at the end away from the connecting rod (11).

5. A flap pushing mechanism for a packaging machine according to claim 1, characterized in that: The packaging machine housing (1) is internally connected to a main shaft (6), and a cam (12) is fixedly connected to the surface of the main shaft (6).

6. A flap-pushing mechanism for a packaging machine according to claim 5, characterized in that: The surface of the cam (12) is provided with a groove (13), and a round shaft (10) that is fixedly connected to one side of the surface of the rotating plate (9) is slidably connected inside the groove (13).

7. A flap pushing mechanism for a packaging machine according to claim 1, characterized in that: The inner wall of the packaging machine housing (1) is fixedly connected to a servo motor (2) and a reducer (3), and the servo motor (2) and the reducer (3) are connected by a belt pulley.

8. A flap pushing mechanism for a packaging machine according to claim 7, characterized in that: The output end of the reducer (3) is fixedly connected to a sprocket (4), and a chain (5) is meshed with the outside of the sprocket (4). The end of the chain (5) away from the sprocket (4) is internally meshed with a sprocket (7) fixedly connected to the surface of the main shaft (6).

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