Winding film packaging device

Abstract

The utility model discloses a wrapping film packing device which comprises a moving trolley, a guide column, a lifting frame, a driving device and a cutter assembly, the guide column is fixedly installed on the moving trolley, the lifting frame is installed on the guide column in a sliding mode, the lifting frame is used for installing a film roll, and the driving device is arranged on the moving trolley. The driving device is used for driving the lifting frame to move in the first preset direction, and the cutter assembly is installed on the lifting frame and used for cutting a thin film released by the thin film roll. The lifting frame is installed on the guide column in a sliding mode, and the driving device drives the lifting frame to ascend and descend relative to the guide column, so that when the moving trolley moves around a packaged object, the object is packaged through unwinding of a thin film roll on the lifting frame, and after packaging, the thin film is cut off through the cutter assembly to complete packaging. In the whole process, packaging can be achieved by moving the moving trolley around the packaged object, and therefore objects at different positions and heights can be flexibly packaged.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a stretch film packaging device. Background Art

[0002] In modern logistics and warehousing management, effective packaging of goods is crucial for ensuring their safe transportation and storage. Traditional stretch film packaging methods often rely on manual labor, which is not only labor-intensive but also inefficient. Especially when handling large or heavy items such as pallets and boxes, operators need to bend frequently, which not only increases the difficulty of the work but also easily leads to physical fatigue and even injury. Furthermore, while existing packaging devices can alleviate the labor burden to a certain extent, these devices are typically bulky and heavy, posing new challenges to mobility and flexibility in work environments with limited space. Therefore, we provide a stretch film packaging device to address these issues. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a stretch film packaging device.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A stretch film packaging device, comprising:

[0006] A mobile trolley, the mobile trolley is used for movement;

[0007] A guide column, the guide column being fixedly mounted on the mobile trolley;

[0008] A lifting frame, the lifting frame is slidably mounted on the guide column, and the lifting frame is used for installing a film roll;

[0009] A driving device, the driving device being disposed on the moving trolley and configured to drive the lifting frame to move along a first preset direction;

[0010] A cutter assembly is installed on the lifting frame and is used for cutting the film released from the film roll.

[0011] Preferably, the lifting frame includes a bracket slidably mounted on the guide column, and rotating disks are mounted on the inner top wall and the inner bottom wall of the bracket, and the film roll is mounted between the two rotating disks.

[0012] Preferably, the bracket includes a movable plate slidably mounted on the guide column, a connecting plate is fixedly arranged between the two movable plates, the two movable plates are connected by the connecting plate, and the two rotating disks are respectively rotatably arranged on the two movable plates.

[0013] Preferably, a spacing adjustment structure is provided on the bracket, and the spacing adjustment structure includes a guide cylinder fixedly mounted on the movable plate, a pull rod is slidably mounted in the guide cylinder, one end of the pull rod is mounted on the rotating disk, and a handle is fixedly mounted on the end of the pull rod away from the rotating disk, and an elastic telescopic part is sleeved on the outer surface of the pull rod, and the elastic telescopic part is located between the rotating disk and the movable plate.

[0014] Preferably, at least one guide shaft is provided between the inner bottom wall and the inner top wall of the bracket.

[0015] Preferably, a column is fixedly mounted on the mobile trolley, the driving device includes a rotating driving member fixedly mounted on the mobile trolley, a wire drum is mounted on the power output end of the rotating driving member, a guide wheel is fixedly mounted on the top of the column, a pull rope is wound on the wire drum, and the pull rope is wound around the guide wheel and connected to the lifting frame.

[0016] Preferably, a handle is fixedly mounted on the column, and a button is provided at the position of the handle.

[0017] Preferably, the cutter assembly includes a mounting plate, a slide groove is provided on one side of the mounting plate, a slider is slidably installed inside the slide groove, the cutter body is fixedly installed on the slider, and a card groove is provided on the side of the mounting plate away from the slide groove.

[0018] Preferably, travel switches are provided at both the highest travel position and the lowest travel position of the lifting frame.

[0019] Preferably, a power supply is installed on the mobile vehicle.

[0020] The utility model has the following advantages:

[0021] 1. The utility model installs a lifting frame on the guide column in a sliding manner, and drives the lifting frame to rise and fall with respect to the guide column through a driving device, so that the objects are packed by unwinding the film roll on the lifting frame during the movement of the mobile trolley around the packed objects. After packing, the film is cut by the cutter assembly to complete the packing. During the whole process, the packing can be achieved by moving the mobile trolley around the packed objects, so that objects at different positions and heights can be flexibly packed, thereby improving the flexibility of object packing.

[0022] 2. The utility model provides a rotating disk on each movable plate, and the film roll is located between the two rotating disks. As the film roll is unwound, the connecting plate rotates, thereby enabling the film roll to rotate and unwind smoothly.

[0023] 3. The utility model changes the distance between the two rotating disks by pulling the pull rod, so that film rolls of different widths can be installed, and the elasticity of the handle drives the rotating disk to always abut against the end of the film roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model from the first perspective.

[0025] Figure 2 This is a schematic diagram of the overall structure of the utility model from a second perspective.

[0026] Figure 3 This is a schematic diagram of the overall structure of the utility model from a third perspective.

[0027] Figure 4 This is a schematic structural diagram of the driving device of the present utility model.

[0028] Figure 5 This is a schematic structural diagram of the positional relationship between the mobile trolley and the rotating drive component of the utility model.

[0029] Figure 6 This is a schematic diagram of the assembly state of the connecting plate and the cutter assembly of the present invention.

[0030] Figure 7 This is a schematic diagram of the explosion state of the connecting plate and cutter assembly of the utility model.

[0031] In the figure, 100, mobile trolley; 200, guide column; 300, lifting frame; 310, movable plate; 320, connecting plate; 330, rotating disk; 340, spacing adjustment structure; 341, guide cylinder; 342, pull rod; 343, elastic telescopic member; 344, handle; 350, guide shaft; 360, limit slot; 400, driving device; 410, rotating driving member; 420, wire drum; 430, guide wheel; 440, pull rope; 500, cutter assembly; 510, mounting plate; 520, slide groove; 530, slider; 540, cutter body; 550, card slot; 600, column; 700, handle; 800, button; 900, power supply. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1 — Figure 7 The embodiment shown.

[0035] Existing automatic balers are generally large in size and inconvenient to move. The objects to be packaged must be moved to the baler position before they can be packaged. Therefore, it is inconvenient to pack the items. The present application installs a film roll on the lifting frame 300, and drives the lifting frame 300 to rise and fall along the guide column 200 through the driving device 400, so that objects of different heights can be packaged. Specifically, the film roll can be unwound by moving the mobile trolley 100 to pack the objects.

[0036] Specifically, the present application discloses a stretch film packaging device, which includes a moving vehicle 100 , a guide column 200 , a lifting frame 300 , a driving device 400 and a cutter assembly 500 .

[0037] The mobile trolley 100 is used for movement, the guide column 200 is fixedly installed on the mobile trolley 100, the lifting frame 300 is slidably installed on the guide column 200, the lifting frame 300 is used for film roll installation, the driving device 400 is set on the mobile trolley 100, the driving device 400 is used to drive the lifting frame 300 to move along a first preset direction, the cutter assembly 500 is installed on the lifting frame 300, and the cutter assembly 500 is used to cut the film released from the film roll.

[0038] See Figures 1 to 3 As shown, the entire device first moves to the vicinity of the object to be packaged by the mobile trolley 100, and then uses the guide column 200 as the vertical movement track of the lifting frame 300 to ensure that the lifting frame 300 can be smoothly lifted and lowered in the height direction under the drive of the driving device 400. The film roll installed on the lifting frame 300 is adjusted to an appropriate height as the lifting frame moves. As the lifting frame 100 moves around the object to be packaged, the film is released from the film roll, and the film roll is released and wrapped around the object to be packaged; when the film is wrapped to the required length or number of layers, the cutter assembly 500 on the lifting frame 300 plays a role, that is, the film is cut by the cutter assembly 500 to complete the film fixation of one packaging cycle; the entire process moves around the object to be packaged, thereby making packaging more flexible.

[0039] The device can be moved to the object to be packaged for packaging as needed. Compared with the existing method of moving the object to the packaging machine for packaging, the device is more flexible.

[0040] In this embodiment, the first preset direction mentioned above is the height direction.

[0041] It should be noted that the precise control of the lifting frame 300 by the drive device 400 enables flexible packaging of objects of varying heights. In practice, the drive device 400, acting as the power source of the entire device, stably and precisely drives the lifting frame 300 vertically along the guide post 200. This design not only makes the packaging process more efficient but also greatly expands the device's application range, enabling it to easily handle objects of various heights and shapes.

[0042] When an object needs to be packaged, the entire device is first moved near the object using the mobile cart 100. Then, based on the object's actual height, the lift 300 is adjusted to the appropriate position using the drive device 400. During this process, as the mobile cart 100 moves around the object being packaged, the film roll on the lift 300 begins to unwind, gradually covering the surface of the object. Simultaneously, the lift 300, driven by the drive device 400, continues to rise, ensuring that the film can be tightly wrapped around the contours of the object. As the lift 300 moves, the film roll on the lift 300 automatically adjusts to the appropriate unwinding height, ensuring that the film fits tightly and evenly onto the surface of the object. During this process, the film's direction and tightness can be fine-tuned manually or through an automatic control system to ensure optimal packaging results.

[0043] When the film is wound to the required length or number of layers, the cutter assembly 500 on the lifting frame 300 quickly and accurately cuts the film, completing the film fixation of a packaging cycle. The whole process is not only efficient and flexible, but also has a tight and beautiful packaging effect, greatly improving the transportation and storage safety of the items.

[0044] Furthermore, the objects packaged in this application are generally larger or heavier objects such as boxes and pallets.

[0045] In this embodiment, the design of the mobile cart 100 takes practicality and flexibility into full consideration. Its main structure consists of a rectangular base, providing a stable support foundation for the entire device. Casters are cleverly mounted at the four corners of the base. These casters not only enable the mobile cart to move easily on various surfaces, but also significantly enhance the device's portability and adaptability.

[0046] In order to further improve the degree of automation, the casters are designed as electric wheels. Through electric drive, the mobile cart 100 can move autonomously in the working area without manual push, thereby greatly improving work efficiency. The application of electric wheels also enables the mobile cart 100 to move more accurately and conveniently to the vicinity of the object to be packaged, providing great convenience for subsequent packaging operations.

[0047] The lifting frame 300 includes a bracket slidably mounted on the guide column 200 , and a rotating disk 330 is mounted on the inner top wall and the inner bottom wall of the bracket. The film roll is mounted between the two rotating disks 330 .

[0048] Continue reading Figures 1 to 3 As shown, in the design of the lifting frame 300, a rotating disk 330 is used to optimize the unwinding process of the film roll. Specifically, the film roll is stably mounted between two rotating disks 330, and the two rotating disks are respectively fixed on the inner top wall and the inner bottom wall of the bracket. It is worth noting that the edges of the two rotating disks 330 are close to the ends of the film roll. This design ensures that they can rotate synchronously when the film roll is unrolled.

[0049] In actual operation, as the mobile trolley 100 moves and the lifting frame 300 rises and falls, the film roll begins to unwind slowly. At this time, the two rotating disks 330 rotate closely following the rotation of the film roll, providing stable support and guidance for the unwinding of the film. This design not only greatly reduces the friction and resistance of the film during the unwinding process, but also makes the unwinding process smoother.

[0050] The bracket includes a movable plate 310 slidably mounted on the guide column 200 , a connecting plate 320 is fixedly arranged between the two movable plates 310 , the two movable plates 310 are connected by the connecting plate 320 , and the two rotating disks 330 are rotatably arranged on the two movable plates 310 respectively.

[0051] See Figure 2 and Figure 3 The detailed structure of the bracket is composed of two movable plates 310 and a connecting plate 320 tightly combined to form a structure that is both stable and can be raised and lowered. The two movable plates 310 are installed on the guide column 200 through a precise sliding mechanism, ensuring the stability and precision of the bracket during the lifting process.

[0052] It should be pointed out here that the inner top wall and the inner bottom wall of the bracket mentioned in the above description are actually composed of the side surfaces of two movable plates 310 close to each other. These two sides not only provide a safe installation environment for the film roll, but also form a complete film roll installation space through the two movable plates 310, the connecting plate 320 and the guide column 200.

[0053] The design of the rotating disk 330 located on the movable plate 310 not only closely abuts against the end of the film roll, ensuring the stability and smoothness of the film during the unwinding process, but also further reduces the friction between the film and the bracket through its own rotation.

[0054] A spacing adjustment structure 340 is provided on the bracket, and the spacing adjustment structure 340 includes a guide cylinder 341 fixedly mounted on the movable plate 310, and a pull rod 342 is slidably installed in the guide cylinder 341, one end of the pull rod 342 is installed with the rotating disk 330, and a handle 344 is fixedly mounted on the end of the pull rod 342 away from the rotating disk 330, and an elastic telescopic part 343 is sleeved on the outer surface of the pull rod 342, and the elastic telescopic part 343 is located between the rotating disk 330 and the movable plate 310.

[0055] Continue reading Figure 2 and Figure 3 As shown, in order to ensure that film rolls of various widths can be firmly placed between the two rotating disks 330, a flexible spacing adjustment structure 340 is designed. This structure allows the user to easily adjust the distance between the two rotating disks according to the actual width of the film roll. This design not only improves the compatibility of the equipment, but also simplifies the installation process of the film roll.

[0056] In practice, there are two basic adjustment strategies for film rolls of varying sizes: one is to adjust the positions of the two rotating disks individually to change the relative distance between them; the other is to adjust both rotating disks simultaneously to achieve a uniform increase or decrease in the spacing. However, in this embodiment, to simplify the process and reduce costs, the spacing is adjusted by adjusting only the position of one rotating disk 330.

[0057] To implement this adjustment mechanism, the user first needs to operate the spacing adjustment mechanism using handle 344. Specifically, they grasp handle 344 and pull it away from rotating disk 330. This action overcomes the resistance created by the elastic member 343, causing the pull rod 342 and its connected rotating disk 330 to move accordingly. As the pull rod extends, the distance between the two rotating disks gradually increases, providing sufficient space for film rolls of different widths.

[0058] Once the distance between the two rotating disks is large enough to accommodate the desired film roll, the user can place the film roll between them. Then, by releasing handle 344, the elastic member 343, with its inherent elastic force, begins to function, pushing the rotating disk 330 and the pull rod 342 toward the end of the film roll. As the rotating disks gradually approach and eventually come into contact with the end of the film roll, not only is the film roll installed, but the physical contact also secures it, effectively preventing it from tipping over or shifting during use.

[0059] This design not only ensures stable installation of the film roll, but also simplifies the installation process and reduces the need for manual intervention through the automatic reset function of the elastic expansion member 343. Furthermore, since the spacing can be changed by simply adjusting the position of a rotating disk, this solution not only improves operational convenience but also reduces manufacturing costs and maintenance complexity, providing users with a more efficient and flexible experience.

[0060] In this embodiment, the elastic stretch member 343 is a spring. Specifically, the elastic stretch member 343 is a compression spring.

[0061] At least one guide shaft 350 is further provided between the inner bottom wall and the inner top wall of the bracket.

[0062] See Figure 2 As shown, in order to prevent the film released from the film roll from wrinkling or twisting, the released film is wound around the surface of the guide shaft 350. Specifically, in order to further guide the released film, a guide shaft 350 is set between the inner bottom wall and the inner top wall of the bracket, that is, two guide shafts 350 are rotatably installed between the two movable plates 310, and the film released from the film roll passes between the two guide shafts 350, and the film is guided by the two guide shafts 350.

[0063] A column 600 is fixedly mounted on the mobile trolley 100, and the driving device 400 includes a rotating driving member 410 fixedly mounted on the mobile trolley 100. A wire drum 420 is mounted on the power output end of the rotating driving member 410. A guide wheel 430 is fixedly mounted on the top of the column 600, and a pull rope 440 is wound on the wire drum 420. The pull rope 440 is wound around the guide wheel 430 and connected to the lifting frame 300.

[0064] In this embodiment, the rotation driving component 410 is a motor.

[0065] See Figure 3 and Figure 4As shown, in order to drive the lifting frame 300 to rise and fall, it is driven to rise by the driving device 400. Specifically, the rotating driving member 410 drives the wire drum 420 to rotate, thereby winding the pull rope 440, so that the lifting frame 300 connected to the pull rope 440 is raised under the guidance of the guide column 200. It should be noted that after the pull rope 440 is released from the wire drum 420, it passes through the internal channel of the column 600 to the guide wheel 430 at the top. The direction of the pull rope 440 is changed by the guide wheel 430. The end of the pull rope 440 away from the wire drum 420 is fixedly connected to the upper movable plate 310, thereby achieving the movement of the movable plate 310 when the pull rope 440 is wound, thereby driving the entire lifting frame 300 to rise; when the lifting frame 300 needs to be lowered, it is only necessary to rotate the driving member 410 to drive the wire drum 420 to rotate in the opposite direction, that is, continue to release the pull rope 440. Under the action of gravity, the lifting frame 300 moves downward under the guidance of the guide column 200.

[0066] In this embodiment, in order to have sufficient force to drive the lifting frame 300 to move, a reducer can be installed at the power output end of the rotating drive member 410, and the conveying shaft of the reducer is connected to the wire drum 420, so that the speed of the rotating drive member 410 is reduced by the reducer to increase the torque, thereby being able to have sufficient force to drive the lifting frame 300 to move up and down. Furthermore, the pull rope 440 can be a steel wire rope.

[0067] In this embodiment, there are two guide wheels 430, both of which are arranged on the fixed plate at the top of the column 600. The pulling direction of the pull rope 440 is changed by the cooperation of the two guide wheels 430.

[0068] Please continue reading Figure 2 and Figure 3 As shown, when the guide column 200 is a cylinder, in order to prevent the bracket composed of the two movable plates 310 and the connecting plate 320 from rotating about the guide column 200, a limiting groove 360 ​​is provided at the end of the movable plate 310 close to the column 600, and the limiting groove 360 ​​is adapted to the column 600, so as to limit the movable plate 310 through the cooperation between the column 600 and the limiting groove 360, and prevent the bracket composed of the movable plate 310 and the connecting plate 320 from rotating around the guide column 200 as the center; in another embodiment, in order to cancel the setting of the limiting groove 360 ​​on the movable plate 310, the guide column 200 can be set to a polygon, of course, the movable plate 310 must also be provided with a sliding hole adapted to the polygon, the polygon here can be a quadrilateral, pentagon, hexagon, etc., which is not limited here, that is, it is only necessary to be able to limit the movable plate 310 in the circumferential direction.

[0069] A power supply 900 is installed on the mobile vehicle 100 ; a handle 700 is fixedly installed on the column 600 , and a button 800 is provided at the position of the handle 700 .

[0070] See Figures 1 to 3 as well as Figure 5 As shown, in this embodiment, the power supply 900 is used to provide power for the operation of the rotating drive member 410 and other electrical components. Accordingly, a corresponding controller is also provided on the mobile cart 100, which controls whether the rotating drive member 410 is driven or turned off, and whether it is forward or reversed. The button 800 is connected to the controller. Specifically, in order to enable the mobile cart 100 to move, a handle 700 is installed on the column 600. When the column 600 needs to move, the handle 700 can be held to push the mobile cart 100 to move, and the button 800 can be used to control the start or stop and forward or reverse rotation of the rotating drive member 410. The number and function of the buttons 800 can be designed according to actual needs and are not limited here.

[0071] The cutter assembly 500 includes a mounting plate 510, one side of which is provided with a slide groove 520, a slider 530 is slidably installed inside the slide groove 520, and a cutter body 540 is fixedly installed on the slider 530. A card slot 550 is provided on the side of the mounting plate 510 away from the slide groove 520.

[0072] See Figure 2 、 Figure 6 and Figure 7 As shown, the cutter assembly 500 is detachably mounted on the connecting plate 320, and the connecting plate 320 is arranged in a vertical direction. The corresponding cutter assembly 500 is vertically detachably mounted on the connecting plate 320. Specifically, the slot 550 can be inserted into the side of the connecting plate 320, and the slot 550 and the connecting plate 320 are connected by interference fit to complete the connection between the mounting plate 510 and the connecting plate 320. Then, the slider 530 is slidably installed in the slide groove 520, and the cutter body 540 moves following the sliding of the slider 530.

[0073] After the objects are packed, the cutter body 540 only needs to slide along the slide 530 in the slide groove 520 to cut the film.

[0074] The lifting frame 300 is provided with travel switches (not shown) at both the highest and lowest travel positions. In this embodiment, in order to prevent the lifting frame 300 from rising too high and colliding with the guide wheel 430, and to prevent the lifting frame 300 from descending too low and colliding with the surface of the moving vehicle 100, travel switches are provided at the highest and lowest travel positions of the lifting frame 300. When the lifting frame 300 touches the travel switches, the rotation of the rotary drive member 410 is automatically stopped.

[0075] The working process of the present invention is as follows: first, the position of one of the rotating disks 330 can be adjusted by the spacing adjustment structure 340, so that the film roll is set between the two rotating disks 330 to complete the installation of the film roll. Next, the handle 700 is manually held to make the mobile trolley 100 wrap around the object to be packaged for one circle. During the movement of the mobile trolley 100, the film roll is unwound at the same time. Then the rotary drive member 410 is started to drive the wire drum 420 to rotate, thereby driving the lifting frame 300 to rise through the pull rope 440. During the rising process of the lifting frame 300, the mobile trolley 100 continues to rotate and move around the object to be packaged, and the packaged object is completed during the movement. Then, the cutter body 540 is manually pushed to move and cut the film. After cutting, the rotary drive member 410 drives the wire drum 420 to rotate in the opposite direction, that is, the pull rope 440 is released. Under the action of gravity, the lifting frame 300 drives the film roll to move downward and returns to the initial position, waiting for the next object to be packaged.

[0076] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stretch film packaging device, characterized in that: include: A mobile trolley (100), the mobile trolley (100) is used for movement; A guide column (200), wherein the guide column (200) is fixedly mounted on the moving vehicle (100); A lifting frame (300), the lifting frame (300) is slidably mounted on the guide column (200), and the lifting frame (300) is used for film roll installation; a driving device (400), the driving device (400) being arranged on the moving trolley (100), and the driving device (400) being used to drive the lifting frame (300) to move along a first preset direction; A cutter assembly (500) is installed on the lifting frame (300), and the cutter assembly (500) is used to cut the film released from the film roll.

2. The stretch film packaging device according to claim 1, characterized in that: The lifting frame (300) comprises a bracket slidably mounted on the guide column (200), and a rotating disk (330) is mounted on the inner top wall and the inner bottom wall of the bracket, and a film roll is mounted between the two rotating disks (330).

3. The stretch film packaging device according to claim 2, characterized in that: The bracket includes a movable plate (310) slidably mounted on the guide column (200), a connecting plate (320) is fixedly arranged between the two movable plates (310), the two movable plates (310) are connected via the connecting plate (320), and the two rotating disks (330) are rotatably arranged on the two movable plates (310).

4. The stretch film packaging device according to claim 3, characterized in that: The bracket is provided with a spacing adjustment structure (340), and the spacing adjustment structure (340) includes a guide cylinder (341) fixedly mounted on the movable plate (310), a pull rod (342) is slidably mounted in the guide cylinder (341), one end of the pull rod (342) is mounted on the rotating disk (330), and a handle (344) is fixedly mounted on the end of the pull rod (342) away from the rotating disk (330), and an elastic telescopic part (343) is sleeved on the outer surface of the pull rod (342), and the elastic telescopic part (343) is located between the rotating disk (330) and the movable plate (310).

5. The stretch film packaging device according to claim 2, characterized in that: At least one guide shaft (350) is also provided between the inner bottom wall and the inner top wall of the bracket.

6. The stretch film packaging device according to claim 1, characterized in that: A column (600) is fixedly mounted on the mobile trolley (100), the driving device (400) comprises a rotating driving member (410) fixedly mounted on the mobile trolley (100), a wire drum (420) is mounted on the power output end of the rotating driving member (410), a guide wheel (430) is fixedly mounted on the top of the column (600), a pull rope (440) is wound around the wire drum (420), and the pull rope (440) is wound around the guide wheel (430) and connected to the lifting frame (300).

7. The stretch film packaging device according to claim 6, characterized in that: A handle (700) is fixedly mounted on the column (600), and a button (800) is provided at the position of the handle (700).

8. The stretch film packaging device according to claim 1, characterized in that: The cutter assembly (500) includes a mounting plate (510), one side of the mounting plate (510) is provided with a slide groove (520), a slider (530) is slidably installed inside the slide groove (520), a cutter body (540) is fixedly installed on the slider (530), and a clamping groove (550) is provided on the side of the mounting plate (510) away from the slide groove (520).

9. The stretch film packaging device according to claim 1, characterized in that: Travel switches are provided at both the highest travel position and the lowest travel position of the lifting frame (300).

10. The stretch film packaging device according to claim 1, characterized in that: A power supply (900) is installed on the mobile vehicle (100).

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