Film conveying mechanism

Abstract

This invention provides a film conveying mechanism for packaging and conveying facial tissues and soft paper. By setting up a first roller group and a second roller group to maintain constant tension in tandem, and a third roller group integrating an opening knife to achieve precise opening, it solves the problems of tension fluctuation, insufficient opening accuracy, and short lifespan of the opening knife in existing equipment. An adjustable roller is installed on both the first and second roller groups. The first roller group dynamically controls the tension, the second roller group stabilizes the discharge tension, and the third roller group adapts to opening requirements via its adjustable roller shaft, improving packaging stability and adaptability.

Description

Technical Field

[0001] This utility model relates to the field of paper product packaging technology, and in particular to a film conveying mechanism. Background Technology

[0002] Household paper products are used every day in our daily lives, including napkins, handkerchiefs, toilet paper, facial tissues, etc. They are also commonly used in households. Their components include chlorine, bleaching powder, wood pulp, etc., and they are renewable resources. Before entering the market, household paper products need to be packaged on packaging equipment.

[0003] The packaging of household paper products requires strict control over three key stages: film feeding tension, opening formation, and discharge tension. Fluctuations in feeding / discharging tension can cause the film to wrinkle and loosen, resulting in poor packaging appearance and product jamming. Insufficient opening precision (positional or dimensional deviations) prevents products from smoothly entering the packaging cavity, reducing production efficiency. Existing equipment relies on manual intervention for tension adjustment, and the opening mechanism and tension system have poor coordination, making changeover adjustments complex and unable to meet the demands of high-speed, multi-specification production. Utility Model Content

[0004] This invention provides a film conveying mechanism to solve the defects of existing technologies, such as tension adjustment relying on manual intervention and complex production changeover debugging leading to poor applicability.

[0005] To achieve the above objectives, the technical solution of this utility model is: a film conveying mechanism, comprising:

[0006] Mounting plates, two of which are arranged opposite each other and form an installation space between them;

[0007] The first roller group is disposed at one end of the mounting plate;

[0008] The second roller group is located at the other end of the mounting plate;

[0009] The third roller group is disposed between the first roller group and the second roller group;

[0010] A transmission component is provided on the mounting plate, and three transmission components are provided and respectively connected to the first roller group, the second roller group and the third roller group;

[0011] The second roller group is fixedly installed, while the first roller group and the third roller group each include an adjustable roller body.

[0012] The adjustable roller body of the first roller group is configured as a first roller shaft, and the adjustable roller body of the third roller group is configured as a second roller shaft. The end of the first roller shaft is provided with a first mounting seat, and the mounting plate is provided with a first mounting groove for placing the first mounting seat. The end of the second roller shaft is provided with a second mounting seat, and the mounting plate is also provided with a second mounting groove for placing the second mounting seat.

[0013] Preferably, the diameter of the first roller is larger than the diameter of the second roller.

[0014] Preferably, the first roller group further includes a third roller shaft, which is disposed below the first roller shaft and is connected to one of the transmission components.

[0015] Preferably, the third roller group further includes a fourth roller shaft, a fifth roller shaft, a sixth roller shaft, a seventh roller shaft, and an eighth roller shaft. The fourth roller shaft is disposed below the second roller shaft and is drivenly connected to the second roller shaft. The fifth roller shaft is disposed between the second roller shaft and the first roller shaft. The sixth roller shaft is disposed between the second roller shaft and the second roller shaft and is located below the fifth roller shaft. The seventh roller shaft and the eighth roller shaft are disposed between the second roller shaft and the second roller group.

[0016] Preferably, the ends of the fourth roller shaft and the second roller shaft are connected by gear meshing.

[0017] Preferably, the eighth roller is mounted on a support frame, the support frame is rotatably mounted on the mounting plate, and the eighth roller is positioned above the mounting plate.

[0018] Preferably, the transmission component includes a motor and a conveyor belt, the motor is mounted on the mounting plate, and the conveyor belt is connected to the first roller group, the second roller group, and the third roller group respectively.

[0019] Preferably, the second roller group includes a ninth roller shaft and a tenth roller shaft, wherein the ninth roller shaft and the tenth roller shaft are arranged side by side.

[0020] Compared with the prior art, the beneficial effects of this utility model are: by setting a first roller group, a second roller group and a third roller group on the mounting plate to transport the film, and by setting an adjustable roller body on both the first roller group and the second roller group, the tension of the film can be adjusted by changing the position of the adjustable roller body, thus making the film conveying mechanism highly applicable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the film conveying mechanism provided by this utility model.

[0023] Figure 2 yes Figure 1 A magnified view of part a in the diagram.

[0024] Figure 3 yes Figure 1 A magnified view of part b in the diagram.

[0025] Figure label:

[0026] 10. Mounting plate; 11. First mounting slot; 12. Second mounting slot; 20. First roller group; 21. First roller shaft; 22. Third roller shaft; 23. First mounting base; 24. First limiting block; 30. Second roller group; 31. Ninth roller shaft; 32. Tenth roller shaft; 40. Third roller group; 41. Second roller shaft; 42. Fourth roller shaft; 43. Fifth roller shaft; 44. Sixth roller shaft; 45. Seventh roller shaft; 46. Eighth roller shaft; 47. Support frame; 48. Second mounting base; 49. Second limiting block; 50. Transmission component; 51. Motor; 52. Conveyor belt; 60. Opening knife base; 70. Opening knife. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to 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, it should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0031] It should be understood that the film conveying mechanism in this application is used to convey films for packaging handkerchiefs, flexible paper, napkins, facial tissues, etc.

[0032] like Figures 1 to 3 As shown, this application embodiment provides a film conveying mechanism, which includes a mounting plate 10, a first roller group 20, a second roller group 30, a third roller group 40, and a transmission component 50. The first roller group 20 is configured as a traction roller group, and the second roller group 30 is configured as a film pulling roller group.

[0033] Specifically, two mounting plates 10 are arranged opposite each other, forming an installation space between them. A first roller group 20, a second roller group 30, and a third roller group 40 are arranged between the two mounting plates 10. The first roller group 20 and the second roller group 30 are respectively arranged at both ends of the mounting plate 10, and the third roller group 40 is arranged between the first roller group 20 and the second roller group 30. A transmission component 50 is arranged on the mounting plate 10. Three transmission components 50 are arranged and are respectively connected to the first roller group 20, the second roller group 30, and the third roller group 40. The transmission components 50 are used to provide transmission power for the first roller group 20, the second roller group 30, and the third roller group 40. The second roller group 30 is fixedly arranged, and the first roller group 20 and the third roller group 40 each include an adjustable roller body.

[0034] The film is conveyed by setting the first roller group 20, the second roller group 30 and the third roller group 40 on the mounting plate 10. An adjustable roller is set on both the first roller group 20 and the second roller group 30. In this way, when it is necessary to adjust the tension of the film, it can be achieved by changing the position of the adjustable roller. This makes the film conveying mechanism highly adaptable.

[0035] In one embodiment, the adjustable roller body of the first roller group 20 is configured as a first roller shaft 21. The first roller group 20 also includes a third roller shaft 22, which is located below the first roller shaft 21. The third roller shaft 22 is connected to one of the transmission components 50. The movement of the transmission component 50 drives the third roller shaft 22 to move. The function of the first roller shaft 21 and the third roller shaft 22 here is to provide traction for the film.

[0036] The adjustable roller body of the third roller group 40 is configured as the second roller shaft 41. The third roller group 40 also includes a fourth roller shaft 42, a fifth roller shaft 43, a sixth roller shaft 44, a seventh roller shaft 45, and an eighth roller shaft 46. The fourth roller shaft 42 is located below the second roller shaft 41 and is connected to the second roller shaft 41 in a transmission manner. Specifically, a first gear is provided at one end of the fourth roller shaft 42, and a second gear is provided at the end of the second roller shaft 41. The first gear and the second gear mesh, and the rotation of the fourth roller shaft 42 drives the second roller shaft 41 to rotate. The other end of the fourth roller shaft 42 is connected to the transmission component 50. The fifth roller shaft 43 is located between the second roller shaft 41 and the first roller shaft 21. The sixth roller shaft 44 is located between the second roller shaft 41 and the fifth roller shaft 43, and the sixth roller shaft 44 is located below the fifth roller shaft 43. The seventh roller shaft 45 and the eighth roller shaft 46 are located between the second roller shaft 41 and the second roller group 30. The film passes sequentially through the fifth roller 43, the sixth roller 41, the second roller 45, and the eighth roller 46. At the same time, when it is necessary to change the height of the second roller 41, the size of the second gear can also be changed.

[0037] An opening knife base 60 is also provided on the second roller 41, and an opening knife 70 is provided on the opening knife base 60 for opening the film.

[0038] In this application, since the first roller group 20 is a traction roller group, the diameter of the first roller shaft 21 is set to be larger than the diameter of the second roller shaft 41.

[0039] In this application, a first mounting seat 23 is provided at the end of the first roller 21, and a first mounting groove 11 for placing the first mounting seat 23 is provided on the mounting plate 10. The first mounting groove 11 limits the two sides of the first mounting seat 23, and the first mounting seat 23 can move up and down in the first mounting groove 11. That is, the height of the first mounting groove 11 is higher than the height of the first mounting seat 23. A first limiting block 24 is fixedly provided at the top of the first mounting groove 11 to limit the movement of the first mounting seat 23. It should be understood that the position of the first mounting seat 23 can be changed by manually adding several shims to the bottom of the first mounting seat 23 to change the height of the first mounting seat 23. Since the height of the first mounting seat 23 of the same product will not change after it is positioned, when different products need to be adapted, only the number of shims needs to be increased or decreased. Since it will not be adjusted frequently, it will not make the adjustment troublesome. Correspondingly, a second mounting seat 48 is provided at the end of the second roller 41, and a second mounting groove 12 is also provided on the mounting plate 10. The second mounting seat 48 is set in the second mounting groove 12, and a second limiting block 49 is fixedly set above the second mounting groove 12. The adjustment method of the second mounting seat 48 is the same as that of the first mounting seat 23, so it will not be described again. Springs can also be provided at the upper ends of the first mounting seat 23 and the second mounting seat 48, respectively connected to the first limiting block 24 and the second limiting block 49, and the springs play a buffering role.

[0040] In one embodiment, a support frame 47 is also provided on the mounting plate 10, and an eighth roller 46 is disposed on the support frame 47. The eighth roller 46 is located above the mounting plate 10. The support frame 47 is rotatably connected to the mounting plate 10. When the support frame 47 swings, its height relative to the mounting plate 10 will change. That is, the height of the support frame 47 can be adjusted. The position of the support frame 47 can be changed by rotating the support frame 47, thereby changing the height of the eighth roller 46, so as to adjust the tension of the film.

[0041] In one embodiment, the second roller group 30 includes a ninth roller shaft 31 and a tenth roller shaft 32, which are arranged side by side. The film moves horizontally when passing through the first roller shaft 21 and the third roller shaft 22, and moves vertically when passing through the ninth roller shaft 31 and the tenth roller shaft 32. The film is in a taut state to allow paper to pass through for packaging.

[0042] In this application, the transmission component 50 includes a motor 51 and a conveyor belt 52. The motor 51 is mounted on the mounting plate 10, and the conveyor belts are respectively connected to the first roller group 20, the second roller group 30, and the third roller group 40. Specifically, each conveyor belt 52 has a third roller shaft 22, a fourth roller shaft 42, and a tenth roller shaft 32.

[0043] In this application, a collaborative design of "dual constant tension + synchronous opening" is adopted. The first roller group 20 has a constant feeding tension and consists of a first roller shaft 21 and a third roller shaft 22 (driven by a servo motor). The first roller shaft 21 achieves fine-tuning of the spacing within the first mounting groove 11 via a first mounting seat 23. Specifically, by turning the adjusting bolt, the first mounting seat 23 moves up and down within the first mounting groove 11, changing the distance between the first roller shaft 21 and the third roller shaft 22. If the film thickness increases, the spacing is increased to avoid tension overload; if the film thickness decreases, the spacing is decreased to enhance tension stability.

[0044] Constant tension mechanism: The servo motor drives the third roller 22 at a constant speed, and the first roller is adjusted to adapt to the film thickness / tension requirements. The two are clamped to form a dynamic constant tension feeding system with "speed synchronization + adjustable spacing".

[0045] The second roller group 30 is a constant tension discharge roller, consisting of the tenth roller shaft 32 and the ninth roller shaft 31 (driven by a servo motor), which cooperate with the first roller group 20 to form a stable clamping structure.

[0046] Constant tension mechanism: Through synchronous transmission and fixed clamping force, the film after opening is transported to the packaging station with constant tension to avoid slack or excessive stretching.

[0047] By linking the synchronous belt with the first roller group 20 and the third roller group 40, it is ensured that the discharge speed = the feed speed + the slight stretching amount in the opening area (compensated by the closed loop of the servo motor), and the discharge tension is maintained to match the feed tension (e.g., if the feed tension is 5N, the discharge tension is stable at 5±0.2N).

[0048] Third roller group 40: Precision opening. Through the opening knife 70, the second roller 41, the fourth roller 42, the fifth roller 43, the sixth roller 44, the seventh roller 45 and the eighth roller 46, the opening knife 70 is fixed to the opening knife base 60, and the multiple rollers guide the film path to form an "S" shaped path (wrap angle ≥120°), and the friction of the rollers helps to stabilize the tension.

[0049] Opening mechanism: The second roller 41 is adjusted by the cooperation of the second mounting base 48 and the second mounting groove 12, and synchronously driven by the servo motor, so that the film contacts the opening knife 70 at a preset angle / tension, so as to achieve precise and controllable opening size and position.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A film conveying mechanism, characterized in that, include: Mounting plates, two of which are arranged opposite each other and form an installation space between them; The first roller group is disposed at one end of the mounting plate; The second roller group is located at the other end of the mounting plate; The third roller group is disposed between the first roller group and the second roller group; A transmission component is provided on the mounting plate, and three transmission components are provided and respectively connected to the first roller group, the second roller group and the third roller group; The second roller group is fixedly installed, while the first roller group and the third roller group each include an adjustable roller body. The adjustable roller body of the first roller group is configured as a first roller shaft, and the adjustable roller body of the third roller group is configured as a second roller shaft. The end of the first roller shaft is provided with a first mounting seat, and the mounting plate is provided with a first mounting groove for placing the first mounting seat. The end of the second roller shaft is provided with a second mounting seat, and the mounting plate is also provided with a second mounting groove for placing the second mounting seat.

2. The film conveying mechanism according to claim 1, characterized in that, The diameter of the first roller is larger than the diameter of the second roller.

3. The film conveying mechanism according to claim 1, characterized in that, The first roller group further includes a third roller shaft, which is disposed below the first roller shaft and is connected to one of the transmission components.

4. The film conveying mechanism according to claim 1, characterized in that, The third roller group further includes a fourth roller shaft, a fifth roller shaft, a sixth roller shaft, a seventh roller shaft, and an eighth roller shaft. The fourth roller shaft is located below the second roller shaft and is connected to the second roller shaft in a driving connection. The fifth roller shaft is located between the second roller shaft and the first roller shaft. The sixth roller shaft is located between the second roller shaft and the second roller shaft and is located below the fifth roller shaft. The seventh roller shaft and the eighth roller shaft are located between the second roller shaft and the second roller group.

5. The film conveying mechanism according to claim 4, characterized in that, The ends of the fourth roller shaft and the second roller shaft are connected by gear meshing.

6. The film conveying mechanism according to claim 5, characterized in that, The eighth roller is mounted on a support frame, which is rotatably mounted on the mounting plate, with the eighth roller positioned above the mounting plate.

7. The film conveying mechanism according to claim 1, characterized in that, The transmission component includes a motor and a conveyor belt. The motor is mounted on the mounting plate, and the conveyor belt is connected to the first roller group, the second roller group, and the third roller group respectively.

8. The film conveying mechanism according to claim 1, characterized in that, The second roller group includes a ninth roller shaft and a tenth roller shaft, which are arranged side by side.

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