Film winding and pressing device and film winding machine with same

Abstract

The utility model provides a kind of film winding pressure top device and the film winding machine with it, film winding pressure top device includes: pressure part, drive cylinder and lifting mechanism, pressure part is movably arranged along vertical direction, pressure part is used to exert pressure on the top of box body;Drive cylinder is arranged at the top of rack, lifting mechanism is respectively connected with the drive end of drive cylinder and pressure part, and pressure part is below lifting mechanism;Drive cylinder is lifted along vertical direction by driving lifting mechanism, so that lifting mechanism drives pressure part to move.The film winding pressure top device effectively solves the technical problems that the film winding machine in the prior art generally relies on box body bottom clamping for positioning, is difficult to be compatible with different size box body, and has poor versatility.

Description

Technical Field

[0001] This utility model relates to the technical field of wrapping machines, specifically to a wrapping pressing device and a wrapping machine having the same. Background Technology

[0002] In modern logistics and warehousing systems, to ensure the stability of containers during transportation, single or stacked containers are usually wrapped with stretch film (i.e., film wrapping). This operation is mostly completed by automatic wrapping machines: a rotating platform drives the container to rotate circumferentially, while the film winding mechanism reciprocates vertically, evenly wrapping the stretch film around the outside of the container.

[0003] However, in actual wrapping processes, when the box is lightweight, has a high center of gravity, or a smooth surface, it is highly susceptible to slippage, tipping, or even displacement due to centrifugal force generated by rotation or film tension. This can lead to problems such as loose wrapping, film misalignment, and packaging failure. Furthermore, the shaking of the box during the wrapping process can interfere with normal equipment operation, affect operational safety, and reduce automation efficiency.

[0004] To address the aforementioned issues, some existing winding equipment employs clamping structures or friction pads at the bottom of the casing to enhance the fixing effect. However, such solutions typically only work on the bottom of the casing, making it difficult to adapt to casings of different sizes and resulting in poor versatility. Furthermore, they cannot effectively suppress the swaying of the upper part of the casing, making it difficult to guarantee the stability of the winding film. Another solution introduces a lateral clamping mechanism, which can improve the positioning effect to some extent, but it is prone to causing damage to the casing surface, and its structure is complex, costly, and inconvenient to maintain.

[0005] Therefore, existing technologies still need further development. Utility Model Content

[0006] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a wrapping pressing device and a wrapping machine having the same, so as to solve the technical problems of existing wrapping machines generally relying on the bottom of the box for positioning, having difficulty in compatibility with boxes of different sizes, and having poor versatility.

[0007] To achieve the above-mentioned technical objectives, according to one aspect of this utility model: a film wrapping and pressing device is provided, comprising: a pressing member, a drive cylinder, and a lifting mechanism. The pressing member is movably arranged in a vertical direction and is used to apply a pressing force to the top of the box. The drive cylinder is arranged at the top of the frame, and the lifting mechanism is connected to the drive end of the drive cylinder and the pressing member respectively. The pressing member is located below the lifting mechanism. The drive cylinder drives the lifting mechanism to move vertically, thereby causing the lifting mechanism to move the pressing member.

[0008] Furthermore, the film wrapping and pressing device also includes: a support frame, which is connected to the cylinder body of the drive cylinder and is located at the bottom of the cylinder body of the drive cylinder; the support frame has a guide hole extending in the vertical direction, and the telescopic rod of the drive cylinder passes through the guide hole and is connected to the lifting mechanism; the lifting mechanism is movably mounted on the support frame.

[0009] Furthermore, the lifting mechanism includes: a first scissor lift assembly and a second scissor lift assembly, which are spaced apart along the width direction of the support frame and are arranged opposite to each other. The tops of the first and second scissor lift assemblies are movably mounted on the support frame, and the bottoms of the first and second scissor lift assemblies are movably mounted on the clamping member; a first drive shaft, which extends along the width direction of the support frame, and its two ends are rotatably connected to the first and second scissor lift assemblies respectively; and the free end of the telescopic rod of the drive cylinder is hinged to the first drive shaft.

[0010] Furthermore, the lifting mechanism also includes: a first link and a second link, one end of the first link and one end of the second link are both hinged to the bottom of the first scissor assembly, and the other ends of the first link and the second link are both rotatably connected to the clamping member, and the other ends of the first link and the second link are spaced apart along the length direction of the support frame; a third link and a fourth link, one end of the third link and one end of the fourth link are both hinged to the top of the first scissor assembly, and the other ends of the third link and the fourth link are both rotatably connected to the support frame, and the other ends of the third link and the fourth link are spaced apart along the length direction of the support frame; the first link and the fourth link are arranged parallel to each other, and the second link and the third link are arranged parallel to each other. The connecting rods are arranged in parallel; the fifth and sixth connecting rods, one end of the fifth connecting rod and one end of the sixth connecting rod are hinged to the bottom of the second scissor lift assembly, and the other ends of the fifth connecting rod and the sixth connecting rod are rotatably connected to the clamping member, and the other ends of the fifth connecting rod and the sixth connecting rod are spaced apart along the length of the support frame; the seventh and eighth connecting rods, one end of the seventh connecting rod and one end of the eighth connecting rod are hinged to the top of the second scissor lift assembly, and the other ends of the seventh connecting rod and the eighth connecting rod are rotatably connected to the support frame, and the other ends of the seventh connecting rod and the eighth connecting rod are spaced apart along the length of the support frame; the fifth and eighth connecting rods are arranged in parallel, and the sixth and seventh connecting rods are arranged in parallel.

[0011] Furthermore, the film wrapping and pressing device also includes: a first gear and a second gear meshing with each other, the first gear and the second gear being rotatably mounted on the pressing member, and the first gear and the second gear being arranged sequentially along the length direction of the support frame; a first connecting rod having one end away from the first scissor assembly fixedly connected to the first gear, and a second connecting rod having one end away from the first scissor assembly fixedly connected to the second gear; a third gear and a fourth gear meshing with each other, the third gear and the fourth gear being rotatably mounted on the pressing member, and the third gear and the fourth gear being arranged sequentially along the length direction of the support frame; a fifth connecting rod having one end away from the second scissor assembly fixedly connected to the third gear, and a sixth connecting rod having one end away from the second scissor assembly fixedly connected to the fourth gear.

[0012] Furthermore, the film wrapping and pressing device also includes: a meshing fifth gear and a sixth gear, which are rotatably mounted on the support frame and arranged sequentially along the length of the support frame; a third connecting rod whose end is away from the first scissor assembly is fixedly connected to the fifth gear, and a fourth connecting rod whose end is away from the first scissor assembly is fixedly connected to the sixth gear; a meshing seventh gear and an eighth gear, which are rotatably mounted on the support frame and arranged sequentially along the length of the support frame; a seventh connecting rod whose end is away from the second scissor assembly is fixedly connected to the seventh gear, and an eighth connecting rod whose end is away from the second scissor assembly is fixedly connected to the eighth gear.

[0013] Furthermore, the clamping component includes: a clamping body, the bottom of which is used to contact the top of the housing, and the top of the clamping body having an installation space; a connecting frame, which is installed within the installation space, and a lifting mechanism is connected to the connecting frame.

[0014] Furthermore, the clamping body includes a clamping plate and an annular side plate. The clamping plate is used to contact the top of the housing, and the annular side plate is fixedly connected to the clamping plate and protrudes from the clamping plate. The clamping plate and the annular side plate form an installation space.

[0015] According to another aspect of the present invention, a wrapping machine is provided, characterized in that it includes the above-mentioned wrapping pressure device.

[0016] Furthermore, the wrapping machine also includes: a rocker arm rotatably arranged around the side wall of the box; and a wrapping mechanism movably arranged on the rocker arm in a vertical direction for wrapping the side wall of the box.

[0017] Beneficial effects: Applying the technical solution of this utility model, the film-wrapping and pressing device provided by this utility model includes: a pressing member, a drive cylinder, and a lifting mechanism. The pressing member is movably arranged in the vertical direction and is used to apply a downward pressing force to the top of the box during film wrapping operations, thereby clamping and fixing the box together with the ground or the support structure supporting the box, preventing it from sliding or tipping over during rotation. The drive cylinder is mounted on the frame and located at the top of the frame. The free end of the telescopic rod of the drive cylinder is set towards the ground, and the telescopic rod is extendable and retractable in the vertical direction. The drive cylinder is located above the pressing member. The lifting mechanism is located between the drive cylinder and the pressing member, and the lifting mechanism is connected to the drive end of the drive cylinder and the pressing member respectively. The drive cylinder drives the lifting mechanism to move up and down in the vertical direction, thereby moving the pressing member closer to or away from the box, realizing adaptive pressing and positioning of boxes of different heights.

[0018] Therefore, by setting up a clamping component and applying downward pressure during the wrapping process, creating a clamping effect between the component and the support structure at the bottom of the box or the ground, the box's stability is significantly enhanced. This effectively prevents slippage, tipping, or swaying caused by rotational centrifugal force or film tension, ensuring tight, neat, and misaligned wrapping. Simultaneously, this top-clamping method avoids the problems of indentation, deformation, or damage to the carton that are easily caused by traditional lateral clamping, better protecting the packaging appearance. Furthermore, the vertical movement of the lifting mechanism driven by the drive cylinder allows for flexible adjustment of the clamping component's height, precisely adapting to boxes of different heights without requiring component replacement or manual intervention, greatly improving the equipment's compatibility and automation flexibility with various box sizes. At the same time, the lifting mechanism, as an intermediate transmission unit between the drive cylinder and the clamping component, effectively transitions and adjusts the driving force, preventing rigid impact from the clamping component upon contact with the box. This indirect drive method absorbs motion inertia, making the clamping process smoother and gentler, especially suitable for lightweight or easily deformable cartons, effectively preventing box collapse or displacement due to impact. Furthermore, the lifting mechanism enhances motion guidance accuracy, ensuring the clamping component moves vertically. This effectively avoids problems such as swaying, tilting, or clamping force eccentricity that can occur under long-term reciprocating motion or uneven load conditions when the drive cylinder is directly connected to the clamping component, significantly improving positioning consistency and reliability. In addition, the lifting mechanism allows the clamping component to achieve a larger effective working stroke; or optimizes the output clamping force under the same driving force, thus flexibly adapting to boxes of different weights, sizes, or rigidities, further enhancing the system's adaptability and operational stability. This wrapping machine top clamping device effectively solves the technical problems of existing wrapping machines that generally rely on bottom clamping for positioning, are difficult to be compatible with boxes of different sizes, and have poor versatility. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings: Figure 1 A first-view structural schematic diagram of the film wrapping and pressing device according to the present invention is shown; Figure 2 A second-view structural schematic diagram of the film wrapping and pressing device according to the present invention is shown.

[0020] The above figures include the following reference numerals: 1. Clamping component; 11. Clamping body; 111. Clamping plate; 112. Annular side plate; 12. Connecting frame; 2. Drive cylinder; 21. Cylinder body; 22. Telescopic rod; 3. Lifting mechanism; 31. First scissor lift assembly; 311. First support arm; 312. Second support arm; 32. Second scissor lift assembly; 321. Third support arm; 322. Fourth support arm; 33. First drive shaft; 34. First connecting rod; 35. Second connecting rod; 36. Third connecting rod; 37. Fourth connecting rod; 38. Fifth connecting rod; 39. Sixth connecting rod; 300. Seventh connecting rod; 301. Eighth connecting rod; 4. Support frame; 5. First gear; 6. Second gear; 7. Third gear; 8. Fourth gear; 9. Fifth gear; 10. Sixth gear; 13. Seventh gear; 14. Eighth gear; 15. Fixing frame; 16. First crossbar; 17. Second crossbar. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] Please see Figures 1 to 2 According to an embodiment of the present invention, a film wrapping and pressing device is provided, comprising: a pressing member 1, a drive cylinder 2, and a lifting mechanism 3. The pressing member 1 is movably arranged in the vertical direction and is used to apply a pressing force to the top of the box. The drive cylinder 2 is arranged on the top of the frame, and the lifting mechanism 3 is connected to the drive end of the drive cylinder 2 and the pressing member 1 respectively. The pressing member 1 is located below the lifting mechanism 3. The drive cylinder 2 can drive the lifting mechanism 3 to move vertically, so that the lifting mechanism 3 drives the pressing member 1 to move.

[0023] As can be seen, the film wrapping and pressing device provided by this utility model includes: a pressing component 1, a drive cylinder 2, and a lifting mechanism 3. The pressing component 1 is movably arranged in the vertical direction and is used to apply a downward pressing force to the top of the box during the film wrapping operation, thereby clamping and fixing the box together with the ground or the support structure used to support the box, preventing it from sliding or tipping over during rotation. The drive cylinder 2 is mounted on the frame and located at the top of the frame. The free end of the telescopic rod 22 of the drive cylinder 2 is set towards the ground, and the telescopic rod 22 is extendable and retractable in the vertical direction. The drive cylinder 2 is located above the pressing component 1. The lifting mechanism 3 is located between the drive cylinder 2 and the pressing component 1, and the lifting mechanism 3 is connected to the drive end of the drive cylinder 2 and the pressing component 1 respectively. The drive cylinder 2 drives the lifting mechanism 3 to rise and fall in the vertical direction, thereby driving the pressing component 1 to move closer to or away from the box, realizing adaptive pressing and positioning of boxes of different heights.

[0024] Therefore, by setting up the clamping component 1 and applying downward clamping force to it during the wrapping process, it forms an upper and lower clamp with the support structure at the bottom of the box or the ground, which significantly enhances the fixation effect of the box and effectively prevents slippage, tipping, or swaying caused by rotational centrifugal force or film tension, thus ensuring tight, neat, and misaligned wrapping. At the same time, this top clamping method avoids the problems of carton indentation, deformation, or damage that are easily caused by traditional side clamping, better protecting the appearance of the packaging. Furthermore, by driving the lifting mechanism 3 vertically through the drive cylinder 2, the height position of the clamping component 1 can be flexibly adjusted to precisely adapt to boxes of different heights without the need to replace parts or manual intervention, greatly improving the equipment's compatibility and automation flexibility for boxes of various specifications. Meanwhile, the lifting mechanism 3, as an intermediate transmission unit between the drive cylinder 2 and the clamping component 1, can effectively transition and adjust the driving force, avoiding rigid impact of the clamping component 1 upon contact with the box. This indirect drive method absorbs motion inertia, making the clamping process smoother and gentler, especially suitable for lightweight or easily deformable cartons, effectively preventing box collapse or displacement due to impact. Furthermore, the lifting mechanism 3 enhances motion guidance accuracy, ensuring the clamping element 1 moves vertically, effectively avoiding problems such as swaying, tilting, or clamping force eccentricity that occur when the drive cylinder 2 is directly connected to the clamping element 1 under long-term reciprocating motion or uneven load conditions, significantly improving positioning consistency and reliability. In addition, by setting the lifting mechanism 3, the clamping element 1 can achieve a larger effective working stroke; or optimize the output clamping force under the same driving force, thus flexibly adapting to boxes of different weights, sizes, or rigidities, further enhancing the system's adaptability and operational stability. This wrapping and pressing device effectively solves the technical problems of existing wrapping machines that generally rely on bottom clamping for positioning, are difficult to be compatible with boxes of different sizes, and have poor versatility.

[0025] Specifically, such as Figures 1 to 2As shown, the film wrapping and pressing device also includes: a support frame 4, which is connected to the cylinder body 21 of the drive cylinder 2 and is located at the bottom of the cylinder body 21 of the drive cylinder 2; the support frame 4 has a guide hole extending in the vertical direction, and the telescopic rod 22 of the drive cylinder 2 passes through the guide hole and is connected to the lifting mechanism 3; the lifting mechanism 3 is movably mounted on the support frame 4.

[0026] By adopting the above-described structural design, guide holes are provided on the support frame 4 to radially limit and guide the telescopic rod 22, effectively constraining its movement trajectory and preventing swaying or deflection of the telescopic rod due to load eccentricity, vibration, or assembly errors. This ensures that the lifting mechanism 3 and the clamping component 1 move smoothly in a strictly vertical direction, avoiding uneven clamping force or uneven stress on the housing. Simultaneously, by setting up the support frame 4 and movably mounting the lifting mechanism 3 on it, the support frame 4 provides a reliable connection point and vertical guiding constraint for the upper part of the lifting mechanism 3. This design significantly improves the structural stability and movement trajectory accuracy of the lifting mechanism 3 during the lifting process: on the one hand, the support frame 4 effectively limits the swaying or deflection of the lifting mechanism 3 in the horizontal direction, ensuring its smooth operation in a strictly vertical direction; on the other hand, the top of the lifting mechanism 3 forms a stable connection with the support frame 4, greatly enhancing the overall rigidity and effectively preventing twisting, tilting, or movement jamming caused by cantilever force or load eccentricity, thereby ensuring the accuracy and reliability of the clamping action.

[0027] Furthermore, the film wrapping and pressing device also includes: a fixing frame 15, which is sleeved on the cylinder body 21 of the drive cylinder 2, and the fixing frame 15 is fixedly connected to the cylinder body 21. The fixing frame 15 is located above the support frame 4, and the drive cylinder 2 is fixed to the frame through the fixing frame 15.

[0028] Optionally, the drive cylinder 2 is a pneumatic cylinder.

[0029] Specifically, such as Figures 1 to 2 As shown, the lifting mechanism 3 includes: a first scissor lift assembly 31 and a second scissor lift assembly 32, which are spaced apart along the width direction of the support frame 4 and are arranged opposite to each other. The top of the first scissor lift assembly 31 and the top of the second scissor lift assembly 32 are movably mounted on the support frame 4, and the bottom of the first scissor lift assembly 31 and the bottom of the second scissor lift assembly 32 are movably mounted on the clamping member 1; a first drive shaft 33, which extends along the width direction of the support frame 4, and its two ends are rotatably connected to the first scissor lift assembly 31 and the second scissor lift assembly 32 respectively; and the free end of the telescopic rod 22 of the drive cylinder 2 is hinged to the first drive shaft 33.

[0030] With the above-described structure, the first scissor lift assembly 31 and the second scissor lift assembly 32 are spaced apart and opposite to each other along the width direction of the support frame 4. They are rigidly connected by the first drive shaft 33, and the telescopic rod 22 of the drive cylinder 2 is hinged to the middle of the drive shaft. When the drive cylinder 2 is activated, the driving force is synchronously transmitted to the two scissor lift assemblies through the first drive shaft 33, forcing them to unfold or retract at the same angle. This drives the two ends of the clamping member 1 to rise and fall synchronously, effectively avoiding tilting, jamming, or uneven load indentation on the housing caused by one side moving first. At the same time, the double scissor lift assemblies are located on both sides of the clamping member 1 in the width direction, forming a stable mechanical layout of "two-point support + middle drive". The clamping force is borne by both scissor lift arms, which greatly reduces the load on one side, enhances the system's torsional resistance and load-bearing rigidity, and is especially suitable for housings with a large area or offset center of gravity, ensuring that the clamping member 1 remains in a horizontal position during the clamping process.

[0031] Among them, such as Figure 2 In the diagram, arrow A indicates the width direction of support frame 4; arrow B indicates the length direction of support frame 4. The width direction of support frame 4 can also be understood as the width direction of clamping member 1.

[0032] Furthermore, both the first scissor lift assembly 31 and the second scissor lift assembly 32 are positioned above the clamping member 1.

[0033] Furthermore, the first scissor lift assembly 31 includes a first support arm 311 and a second support arm 312 arranged in a cross configuration, both being symmetrical structures. The end of the first drive shaft 33 furthest from the second scissor lift assembly 32 passes through the center point of the first support arm 311 and the center point of the second support arm 312, and is rotatably connected to both at that central position (i.e., both the first support arm 311 and the second support arm 312 are sleeved on the first drive shaft 33, the first support arm 311 and the second support arm 312 are located at the end of the first drive shaft 33 furthest from the second scissor lift assembly 32, and this end of the first drive shaft 33 is located at the center of the intersection of the two support arms, forming a stable hinged linkage node). The top ends of the first support arm 311 and the second support arm 312 are movably mounted on the support frame 4, and the bottom ends of the first support arm 311 and the second support arm 312 are movably mounted on the clamping member 1. The top of the first support arm 311 and the top of the second support arm 312 form the top of the first scissor lift assembly 31, and the bottom of the first support arm 311 and the bottom of the second support arm 312 form the bottom of the first scissor lift assembly 31.

[0034] Furthermore, the second scissor lift assembly 32 includes a third support arm 321 and a fourth support arm 322 arranged in a cross configuration, both being symmetrical structures. The end of the first drive shaft 33 furthest from the first scissor lift assembly 31 passes through the center point of the third support arm 321 and the center point of the fourth support arm 322, and is rotatably connected to both at this central position (i.e., both the third support arm 321 and the fourth support arm 322 are sleeved on the first drive shaft 33, with the third support arm 321 and the fourth support arm 322 located at the end of the first drive shaft 33 furthest from the first scissor lift assembly 31, and this end of the first drive shaft 33 located at the center of the intersection of the two support arms, forming a stable hinged linkage node). The top ends of the third support arm 321 and the fourth support arm 322 are movably mounted on the support frame 4, and the bottom ends of the third support arm 321 and the fourth support arm 322 are movably mounted on the clamping member 1. The top of the third support arm 321 and the top of the fourth support arm 322 form the top of the second scissor lift assembly 32, and the bottom of the third support arm 321 and the bottom of the fourth support arm 322 form the bottom of the second scissor lift assembly 32.

[0035] Furthermore, the film wrapping and pressing device also includes: two first crossbars 16, which are spaced apart along the extension direction of the first support arm 311, and the two ends of the two first crossbars 16 are respectively hinged to the first support arm 311 and the third support arm 321.

[0036] Furthermore, the film-wrapping and pressing device also includes two second crossbars 17, which are spaced apart along the extension direction of the second support arm 312, and the two ends of the two second crossbars 17 are respectively hinged to the second support arm 312 and the fourth support arm 322. Two first crossbars 16 and two second crossbars 17 are arranged in a one-to-one correspondence, with each first crossbar 16 located below the corresponding second crossbar 17.

[0037] Specifically, such as Figures 1 to 2 As shown, the lifting mechanism 3 also includes a first link 34 and a second link 35. One end of the first link 34 and one end of the second link 35 are both hinged to the bottom of the first scissor assembly 31. The other end of the first link 34 and the other end of the second link 35 are both rotatably connected to the clamping member 1. The other ends of the first link 34 and the other ends of the second link 35 are spaced apart along the length of the support frame 4.

[0038] The third link 36 and the fourth link 37 are hinged at one end to the top of the first scissor lift assembly 31, and the other ends of the third link 36 and the fourth link 37 are rotatably connected to the support frame 4. The other ends of the third link 36 and the fourth link 37 are spaced apart along the length of the support frame 4. The first link 34 is parallel to the fourth link 37, and the second link 35 is parallel to the third link 36.

[0039] The fifth link 38 and the sixth link 39 are hinged at one end to the bottom of the second scissor lift assembly 32, and the other ends of the fifth link 38 and the sixth link 39 are rotatably connected to the clamping member 1. The other ends of the fifth link 38 and the sixth link 39 are spaced apart along the length of the support frame 4.

[0040] The seventh link 300 and the eighth link 301 are hinged at one end to the top of the second scissor lift assembly 32, and the other ends of the seventh link 300 and the eighth link 301 are rotatably connected to the support frame 4. The other ends of the seventh link 300 and the eighth link 301 are spaced apart along the length of the support frame 4. The fifth link 38 is parallel to the eighth link 301, and the sixth link 39 is parallel to the seventh link 300.

[0041] With the above-described structure, the first link 34 is parallel to the fourth link 37, and the second link 35 is parallel to the third link 36, forming two sets of parallelogram linkage mechanisms, connecting the clamping member 1 and the support frame 4 respectively. Similarly, the fifth to eighth links form a symmetrical parallel guide structure on the other side. This design forces the clamping member 1 to maintain a strictly horizontal posture during lifting and lowering, effectively preventing tilting, twisting, or unilateral sinking even under eccentric loads or dynamic impacts, ensuring uniform pressure on the top of the housing. At the same time, the third to fourth links (and the seventh to eighth links) flexibly connect the top of the scissor lift to the support frame 4, forming a lateral constraint that effectively limits the lateral displacement of the scissor lift arm. Meanwhile, the bottom links (first to second, fifth to sixth) link the bottom of the scissor lift to the clamping member 1, avoiding local suspension and improving the overall anti-disturbance capability. In addition, the multi-link structure distributes the clamping force and driving reaction force to multiple hinge points, avoiding stress concentration at the scissor lift hinge center or drive shaft.

[0042] Furthermore, the end of the first link 34 away from the clamping member 1 is hinged to one end of the second support arm 312, and the end of the fourth link 37 away from the support frame 4 is hinged to the other end of the second support arm 312. The end of the second link 35 away from the clamping member 1 is hinged to one end of the first support arm 311; and the end of the third link 36 away from the support frame 4 is hinged to the other end of the first support arm 311.

[0043] Furthermore, the end of the fifth link 38 away from the clamping member 1 is hinged to one end of the fourth support arm 322, and the end of the eighth link 301 away from the support frame 4 is hinged to the other end of the fourth support arm 322. The end of the sixth link 39 away from the clamping member 1 is hinged to one end of the third support arm 321, and the end of the seventh link 300 away from the support frame 4 is hinged to the other end of the third support arm 321.

[0044] It should be noted that the top end of the first support arm 311 refers to the end that is hinged to the third link 36, while its bottom end refers to the end that is hinged to the second link 35. The top end of the second support arm 312 refers to the end that is hinged to the fourth link 37, and the bottom end of the second support arm 312 refers to the end that is hinged to the first link 34.

[0045] The top end of the third support arm 321 refers to the end that is hinged to the seventh link 300, and the bottom end of the third support arm 321 refers to the end that is hinged to the sixth link 39. The top end of the fourth support arm 322 refers to the end that is hinged to the eighth link 301, and the bottom end of the fourth support arm 322 refers to the end that is hinged to the fifth link 38.

[0046] Specifically, such as Figures 1 to 2 As shown, the film wrapping and pressing device further includes: a first gear 5 and a second gear 6 meshing with each other, the first gear 5 and the second gear 6 being rotatably mounted on the pressing member 1, and the first gear 5 and the second gear 6 being arranged sequentially along the length direction of the support frame 4; the end of the first connecting rod 34 away from the first scissor assembly 31 being fixedly connected to the first gear 5, and the end of the second connecting rod 35 away from the first scissor assembly 31 being fixedly connected to the second gear 6; a third gear 7 and a fourth gear 8 meshing with each other, the third gear 7 and the fourth gear 8 being rotatably mounted on the pressing member 1, and the third gear 7 and the fourth gear 8 being arranged sequentially along the length direction of the support frame 4; the end of the fifth connecting rod 38 away from the second scissor assembly 32 being fixedly connected to the third gear 7, and the end of the sixth connecting rod 39 away from the second scissor assembly 32 being fixedly connected to the fourth gear 8.

[0047] With the above-described structure, by configuring the first gear 5 and the second gear 6 to mesh with each other, when the lifting mechanism is activated, if the first connecting rod 34 is rotated under force, it will drive the first gear 5 to rotate, and through the gear meshing relationship, drive the second gear 6 to rotate at the same speed but in the opposite direction, thereby causing the second connecting rod 35 to swing in the opposite direction synchronously; the linkage principle of the third gear 7 and the fourth gear 8 is the same. This design ensures that the two connecting rods on the same side always move in a symmetrical and coordinated manner, effectively offsetting the torque on one side and preventing the clamping member 1 from twisting or swaying around its own axis during the lifting process, thus maintaining a horizontal posture and centering accuracy at all times. In addition, with the help of the rigid transmission characteristics of gear meshing, the connecting rods on both sides can move precisely and in tandem, so that the pressure of the clamping member 1 on the top of the box is evenly applied through multiple connection points; even if there is a slight shift in the center of gravity of the box, the gear linkage mechanism can automatically balance the force at each point, effectively avoiding problems such as box collapse, surface indentation, or positioning misalignment caused by contact on one side first.

[0048] Specifically, such as Figures 1 to 2 As shown, the film wrapping and pressing device further includes: a meshing fifth gear 9 and a sixth gear 10, which are rotatably mounted on the support frame 4 and arranged sequentially along the length of the support frame 4; a third connecting rod 36 whose end away from the first scissor assembly 31 is fixedly connected to the fifth gear 9, and a fourth connecting rod 37 whose end away from the first scissor assembly 31 is fixedly connected to the sixth gear 10; a meshing seventh gear 13 and an eighth gear 14, which are rotatably mounted on the support frame 4 and arranged sequentially along the length of the support frame 4; a seventh connecting rod 300 whose end away from the second scissor assembly 32 is fixedly connected to the seventh gear 13, and an eighth connecting rod 301 whose end away from the second scissor assembly 32 is fixedly connected to the eighth gear 14.

[0049] With the above-described structure, two sets of meshing gear pairs (fifth gear 9 and sixth gear 10, seventh gear 13 and eighth gear 14) are installed on the support frame 4, and the top connecting rods are fixedly connected to the corresponding gears, thus creating a reverse synchronous linkage mechanism in the upper part of the lifting mechanism 3. When the third connecting rod 36 is rotated under force, it drives the fifth gear 9 to rotate, and through the meshing relationship, drives the sixth gear 10 to rotate in the opposite direction at the same speed, thereby causing the fourth connecting rod 37 to swing synchronously in the opposite direction; the linkage principle of the seventh gear 13 and the eighth gear 14 is the same. This structure ensures that the movement of the connecting rods on both sides of the top of the scissor lift assembly is strictly symmetrical, effectively suppressing the twisting, swaying or tilting of the clamping member 1 during the lifting process, and significantly improving the overall movement stability and positioning accuracy. In addition, both the upper and lower ends adopt a gear meshing linkage design (the first to fourth gears on the clamping member 1 side, and the fifth to eighth gears on the support frame 4 side), forming a "double-layer synchronous constraint" system. This dual protection not only significantly enhances the structural rigidity and anti-eccentric load capacity of the lifting mechanism, but also automatically balances the force distribution at each connection point when the size or center of gravity of the box changes, avoiding damage to the carton or positioning failure caused by local stress concentration. This enables stable, gentle and precise top clamping of boxes of different specifications, comprehensively improving the reliability and adaptability of the wrapping operation.

[0050] Specifically, such as Figures 1 to 2 As shown, the clamping component 1 includes: a clamping body 11, the bottom of which is used to contact the top of the housing, and the top of the clamping body 11 having an installation space; a connecting frame 12, which is installed within the installation space, and a lifting mechanism 3 connected to the connecting frame 12. The connecting frame 12 protrudes from the bottom wall of the installation space. With this structural arrangement, by fixing the connecting frame 12 to the installation space at the top of the clamping body 11 and connecting the lifting mechanism 3 to the connecting frame 12, the lifting driving force acts directly on the upper central area of ​​the clamping body 11. The force transmission path is short and symmetrical, effectively avoiding tilting or swaying caused by uneven loading during the clamping process. Furthermore, the first gear 5 to the fourth gear 8 are rotatably mounted on the connecting frame 12.

[0051] Furthermore, such as Figures 1 to 2As shown, the clamping body 11 includes a clamping plate 111 and an annular side plate 112. The clamping plate 111 is used to contact the top of the box. The annular side plate 112 is fixedly connected to the clamping plate 111 and is provided to protrude from the clamping plate 111. The clamping plate 111 and the annular side plate 112 form an installation space. With this structural design, the installation space formed by the integrated enclosure of the clamping plate 111 and the annular side plate 112 not only provides a stable internal installation position for the connecting frame 12, allowing the driving force of the lifting mechanism 3 to be directly and centrally transmitted to the central area of ​​the clamping body 11 through the connecting frame 12, effectively suppressing off-center loading and shaking during the clamping process; at the same time, the clamping plate 111, as an independent lower contact surface, has a flat surface without exposed connecting parts, and can fully fit with the top of the housing, improving the reliability of clamping; in addition, the annular side plate 112 forms a circumferential enclosure of the installation space, which limits and protects the connecting frame 12, preventing it from lateral displacement or loosening during operation, and enhancing the overall rigidity and long-term stability of the device.

[0052] Optionally, the working process of the film wrapping and pressing device is as follows: When the container is transported directly below the wrapping and pressing device, ready for the wrapping operation, the drive cylinder 2 is activated, and its telescopic rod 22 extends vertically downward (i.e. towards the container). The free end of the telescopic rod 22 is hinged to the middle of the first drive shaft 33, thus applying a downward thrust to the first drive shaft 33 during the extension process.

[0053] The thrust is synchronously transmitted through the first drive shaft 33 to the hinge points of the cross arms of the first scissor lift assembly 31 and the second scissor lift assembly 32. Under this downward thrust, the included angle α of the cross arms in the two scissor lift assemblies decreases, meaning the entire scissor lift structure begins to extend in the height direction. As the scissor lift assemblies extend, the top and bottom ends of the two support arms of the first scissor lift assembly 31 and the two support arms of the second scissor lift assembly 32 approach each other, thereby increasing the distance between the clamping member 1 and the support frame 4, thus pushing the clamping member 1 downward as a whole.

[0054] During this process, the first connecting rod 34 and the second connecting rod 35 connected to the bottom of the first scissor lift assembly 31 swing accordingly: the first connecting rod 34 drives the first gear 5, which is fixedly connected to it, to rotate around its own axis relative to the clamping member 1; since the first gear 5 and the second gear 6 mesh with each other, the second gear 6 then rotates at the same speed but in the opposite direction, and drives the second connecting rod 35, which is fixedly connected to it, to swing synchronously in the opposite direction. Thus, the first connecting rod 34 and the second connecting rod 35 achieve symmetrical and coordinated movement, ensuring that the clamping member 1 is subjected to balanced force and has a horizontal posture.

[0055] Simultaneously, the third link 36 and the fourth link 37 connected to the top of the first scissor lift assembly 31 also move synchronously: the third link 36 drives the fifth gear 9 to rotate relative to the support frame 4 around its mounting axis; the fifth gear 9 meshes with the sixth gear 10, thereby driving the sixth gear 10 to rotate in the opposite direction, and causing the fourth link 37 to swing accordingly. Thus, the third link 36 and the fourth link 37 also achieve synchronous movement in opposite directions, forming a stable constraint on the top of the scissor lift, preventing the mechanism from swaying or twisting.

[0056] The fifth to eighth links on the second scissor lift assembly 32 and their corresponding gear sets (i.e., the third gear 7 and the fourth gear 8, as well as the seventh gear 13 and the eighth gear 14) work on the same principle, achieving synchronous and coordinated action of the right-side structure.

[0057] Finally, the entire lifting mechanism 3 extends smoothly under the drive of the drive cylinder 2, driving the clamping component 1 to descend precisely and vertically to the top of the box, and applying a moderate and uniform clamping force, which together with the bottom support platform clamps and fixes the box, providing a stable and reliable positioning foundation for subsequent rocker arm rotation and wrapping operations.

[0058] When it is necessary to lift the clamping member 1 away from the housing, the drive cylinder 2 retracts, and its telescopic rod 22 moves upward in the vertical direction. This retraction action applies an upward pulling force to the two sets of scissor assemblies through the first drive shaft 33. Under this pulling force, the angle α between the cross arms of the first scissor assembly 31 and the second scissor assembly 32 increases, causing the entire lifting mechanism 3 to retract in the height direction (i.e., the lifting mechanism 3 extends in the horizontal direction). Specifically: the top end of the first support arm 311 of the first scissor assembly 31 approaches the bottom end of the second support arm 312, and the bottom end of the first support arm 311 of the first scissor assembly 31 approaches the top end of the second support arm 312. The top end of the third support arm 321 of the second scissor assembly 32 approaches the bottom end of the fourth support arm 322, and the bottom end of the third support arm 321 of the second scissor assembly 32 approaches the top end of the fourth support arm 322. This shortens the distance between the clamping member 1 and the support frame 4, thereby driving the clamping member 1 to rise.

[0059] At the same time, the linkage and gear synchronization mechanism (including the first to eighth linkages and their corresponding gear pairs) connected to the scissor lift assembly begins to move in the opposite direction, the principle of which is the opposite of the descent process. This synchronization mechanism ensures that the clamping component 1 always maintains a horizontal posture during the ascent, with balanced force and no risk of swaying or jamming.

[0060] Finally, clamping element 1 rises smoothly to the predetermined position, making room for the box to enter or be removed.

[0061] This utility model provides a wrapping machine, including: the wrapping pressing device described in the above embodiment.

[0062] Specifically, the wrapping machine also includes: a rocker arm, which is rotatably arranged around the side wall of the box; and a wrapping mechanism, which is movably arranged on the rocker arm in a vertical direction, for wrapping the side wall of the box.

[0063] With the above-described structure, the pressure cap and wrapping film work synergistically to significantly improve packaging stability. During the wrapping process, the pressure cap applies a controllable downward pressure to the top of the box, forming a clamping effect with the bottom support. This effectively prevents the box from slipping, tipping, or shaking due to centrifugal force or film tension when the rocker arm rotates. Simultaneously, the rocker arm rotates around the side wall of the box, causing the wrapping mechanism to evenly cover the box circumferentially. The two mechanisms work together to ensure a smooth wrapping process and a tight, neat film layer, significantly improving packaging quality and reliability. Furthermore, the wrapping mechanism is movably mounted vertically on the rocker arm, allowing for synchronous up-and-down reciprocating motion during rotation, achieving continuous spiral wrapping from the bottom to the top of the box. Combined with the pressure cap's adaptive adjustment capability for boxes of different heights, the machine is compatible with various box sizes without requiring tooling changes, greatly improving equipment flexibility and automation.

[0064] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0065] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0066] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0067] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0068] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A film-wrapping and pressing device, characterized in that, include: A clamping element (1) is movably disposed in the vertical direction, and the clamping element (1) is used to apply a clamping force to the top of the box; The drive cylinder (2) and the lifting mechanism (3) are provided. The drive cylinder (2) is located at the top of the frame. The lifting mechanism (3) is connected to the drive end of the drive cylinder (2) and the clamping member (1) respectively. The clamping member (1) is located below the lifting mechanism (3). The drive cylinder (2) drives the lifting mechanism (3) to move up and down in the vertical direction, so that the lifting mechanism (3) drives the clamping member (1) to move.

2. The film-wrapping and pressing device according to claim 1, characterized in that, The film wrapping and pressing device further includes: a support frame (4), which is connected to the cylinder body (21) of the drive cylinder (2) and is located at the bottom of the cylinder body (21) of the drive cylinder (2); the support frame (4) has a guide hole extending along the vertical direction, and the telescopic rod (22) of the drive cylinder (2) passes through the guide hole and is connected to the lifting mechanism (3); the lifting mechanism (3) is movably mounted on the support frame (4).

3. The film-wrapping and pressing device according to claim 2, characterized in that, The lifting mechanism (3) includes: The first scissor fork assembly (31) and the second scissor fork assembly (32) are spaced apart along the width direction of the support frame (4) and are arranged opposite to each other. The top of the first scissor fork assembly (31) and the top of the second scissor fork assembly (32) are movably mounted on the support frame (4), and the bottom of the first scissor fork assembly (31) and the bottom of the second scissor fork assembly (32) are movably mounted on the clamping member (1). The first drive shaft (33) extends along the width direction of the support frame (4), and the two ends of the first drive shaft (33) are rotatably connected to the first scissor lift assembly (31) and the second scissor lift assembly (32), respectively; the free end of the telescopic rod (22) of the drive cylinder (2) is hinged to the first drive shaft (33).

4. The film-wrapping and pressing device according to claim 3, characterized in that, The lifting mechanism (3) also includes: The first link (34) and the second link (35) are hinged to the bottom of the first scissor lift assembly (31) at one end and the second link (35) at one end. The other ends of the first link (34) and the second link (35) are rotatably connected to the clamping member (1). The other ends of the first link (34) and the second link (35) are spaced apart along the length of the support frame (4). The third link (36) and the fourth link (37) are hinged at one end to the top of the first scissor lift assembly (31), and the other ends of the third link (36) and the fourth link (37) are rotatably connected to the support frame (4). The other ends of the third link (36) and the fourth link (37) are spaced apart along the length of the support frame (4). The first link (34) is parallel to the fourth link (37), and the second link (35) is parallel to the third link (36). The fifth link (38) and the sixth link (39) are hinged to the bottom of the second scissor lift assembly (32) at one end and the sixth link (39) at the other end, which are rotatably connected to the clamping member (1). The other ends of the fifth link (38) and the sixth link (39) are spaced apart along the length of the support frame (4). The seventh link (300) and the eighth link (301) are hinged at one end to the top of the second scissor lift assembly (32), and the other ends of the seventh link (300) and the eighth link (301) are rotatably connected to the support frame (4). The other ends of the seventh link (300) and the eighth link (301) are spaced apart along the length of the support frame (4). The fifth link (38) is parallel to the eighth link (301), and the sixth link (39) is parallel to the seventh link (300).

5. The film-wrapping and pressing device according to claim 4, characterized in that, The wrapping and pressing device also includes: A first gear (5) and a second gear (6) mesh with each other, the first gear (5) and the second gear (6) are rotatably mounted on the clamping member (1), and the first gear (5) and the second gear (6) are arranged sequentially along the length direction of the support frame (4); the end of the first connecting rod (34) away from the first scissor fork assembly (31) is fixedly connected to the first gear (5), and the end of the second connecting rod (35) away from the first scissor fork assembly (31) is fixedly connected to the second gear (6); The third gear (7) and the fourth gear (8) mesh with each other, the third gear (7) and the fourth gear (8) are rotatably mounted on the clamping member (1), and the third gear (7) and the fourth gear (8) are arranged sequentially along the length direction of the support frame (4); the end of the fifth link (38) away from the second scissor assembly (32) is fixedly connected to the third gear (7), and the end of the sixth link (39) away from the second scissor assembly (32) is fixedly connected to the fourth gear (8).

6. The film-wrapping and pressing device according to claim 4, characterized in that, The wrapping and pressing device also includes: A fifth gear (9) and a sixth gear (10) mesh with each other, the fifth gear (9) and the sixth gear (10) are rotatably mounted on the support frame (4), and the fifth gear (9) and the sixth gear (10) are arranged sequentially along the length direction of the support frame (4); the end of the third link (36) away from the first scissor fork assembly (31) is fixedly connected to the fifth gear (9), and the end of the fourth link (37) away from the first scissor fork assembly (31) is fixedly connected to the sixth gear (10); The seventh gear (13) and the eighth gear (14) mesh with each other, the seventh gear (13) and the eighth gear (14) are rotatably mounted on the support frame (4), and the seventh gear (13) and the eighth gear (14) are arranged sequentially along the length direction of the support frame (4); the end of the seventh link (300) away from the second scissor assembly (32) is fixedly connected to the seventh gear (13), and the end of the eighth link (301) away from the second scissor assembly (32) is fixedly connected to the eighth gear (14).

7. The film-wrapping and pressing device according to claim 1, characterized in that, The clamping element (1) includes: A clamping body (11) is provided, the bottom of which is used to contact the top of the housing, and the top of the clamping body (11) has an installation space. A connecting frame (12) is installed in the installation space, and the lifting mechanism (3) is connected to the connecting frame (12).

8. The film-wrapping and pressing device according to claim 7, characterized in that, The clamping body (11) includes a clamping plate (111) and an annular side plate (112). The clamping plate (111) is used to contact the top of the housing. The annular side plate (112) is fixedly connected to the clamping plate (111) and the annular side plate (112) protrudes from the clamping plate (111). The clamping plate (111) and the annular side plate (112) form the installation space.

9. A wrapping machine, characterized in that, include: The film wrapping and pressing device as described in any one of claims 1 to 8.

10. The wrapping machine according to claim 9, characterized in that, The wrapping machine also includes: A rocker arm, which is rotatably disposed around the side wall of the housing; A film wrapping mechanism is movably mounted on the rocker arm in a vertical direction for wrapping the side walls of the housing.

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