Unwinding film winding device

Abstract

The utility model provides an unwinding film winding device which comprises an unwinding trolley and an unwinding assembly, trundles are arranged at the bottom of the unwinding trolley, the unwinding assembly is fixedly connected with the unwinding trolley, the unwinding assembly comprises an unwinding shaft, and a packaging film is nested on the unwinding shaft; the unwinding trolley can drive the unwinding assembly to rotate around the workpiece, so that the packaging film on the unwinding shaft covers the outer side of the workpiece. The unwinding shaft is driven by the trundles at the bottom of the unwinding trolley to rotate around the outer side of the workpiece, all-directional film winding covering of the workpiece is achieved, the structure of the unwinding film winding device is simplified, and the film winding efficiency is improved.

Description

Technical Field

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

[0002] During the storage and placement of production materials, a protective film is applied to the outside of the packaged materials to prevent rain from soaking the packaging boxes and potentially endangering their quality. Traditional wrapping requires operators to manually wrap the materials with the wrapping film in both hands. Specifically, the operator grasps the wrapping film's axis and rotates it around the material, wrapping it around the periphery at various locations. The constant rotation of the wrapping film generates heat from friction at the grip, impacting both production efficiency and operator stability. Furthermore, handheld operation is labor-intensive, and differences in operator experience and operation can lead to uneven wrapping surfaces, reducing wrapping efficiency.

[0003] Existing automated unwinding and winding devices usually fix the film winding components and allow the product to move to achieve product packaging. However, in the large-scale product packaging process, moving the product requires setting up a special transmission line or changing the winding line to achieve all-round film winding of the product, which sharply increases the film winding cost and is not conducive to improving the film winding efficiency. Utility Model Content

[0004] In order to overcome the problems existing in the related technology, the purpose of the utility model is to provide a film unwinding device, which drives the unwinding shaft to rotate around the outside of the workpiece through the casters at the bottom of the unwinding trolley, thereby achieving all-round film coverage of the workpiece, simplifying the structure of the unwinding film winding device and improving the film winding efficiency.

[0005] A film unwinding device includes an unwinding trolley and an unwinding assembly. Casters are provided at the bottom of the unwinding trolley. The unwinding assembly is fixedly connected to the unwinding trolley. The unwinding assembly includes an unwinding shaft, and the packaging film is nested on the unwinding shaft. The unwinding trolley can drive the unwinding assembly to rotate around a workpiece so that the packaging film on the unwinding shaft covers the outside of the workpiece.

[0006] The principle of this application is that the workpiece is fixed, and the unwinding trolley drives the unwinding shaft to rotate around the workpiece, so that the outside of the workpiece is wrapped with packaging film, avoiding the manual operation defects of holding the unwinding shaft for unwinding, and also avoiding the inconvenience caused by the need to move or rotate the workpiece, simplifying the structure of the unwinding and winding device, and improving the winding efficiency.

[0007] In a preferred technical solution of the present invention, the unwinding trolley includes a frame body, a fixing rod is provided in the frame body, the unwinding shaft is arranged parallel to the fixing rod, and the two ends of the unwinding shaft are respectively fixedly connected to the two ends of the fixing rod.

[0008] In the present application, the vehicle frame can be of any shape, such as a cuboid, a cylinder, or other irregular shapes, wherein a fixed rod is provided at the edge of the vehicle frame, and the fixed rod can be specifically a vertical rod-shaped structure. The unwinding shaft is provided parallel to the fixed rod and also extends in the vertical direction. The packaging film can specifically be a roll-shaped structure, and the center of the roll packaging film is nested on the unwinding shaft. The vertically arranged unwinding shaft and fixed rod can ensure that the unwinding film is wrapped around the outside of the workpiece with the maximum area, and the unwinding shaft can be suspended outside the unwinding trolley through the fixed rod. In this way, when wrapping the product, it is only necessary to move the side where the fixed rod is located close to the workpiece to make the unwinding shaft and the workpiece closely fit, and then the unwinding trolley drives the unwinding film to unwind and wrap.

[0009] In a preferred technical solution of the present invention, a lifting drive component is further provided in the frame body, and the output end of the lifting drive component is connected to the fixing rod.

[0010] The lifting drive can drive the fixed rod to lift in the vertical direction, and the fixed rod and the unwinding shaft are fixedly connected, so that the lifting drive can drive the fixed rod and the unwinding shaft to lift. For workpieces with a larger height, the lifting drive can achieve wrapping at different heights of the workpiece. In actual operation, the height of the unwinding shaft can be adjusted by the lifting drive to achieve wrapping of the workpiece from top to bottom or from bottom to top. The lifting drive is integrated inside the unwinding trolley, which simplifies the structure of the unwinding film device and can also be used for wrapping workpieces of different heights, which helps to improve the scope of application of the device of this application.

[0011] In a preferred technical solution of the present invention, the frame body is a rectangular frame, and the frame body includes a first vertical rod, a second vertical rod, a third vertical rod and a fourth vertical rod arranged in parallel, a traction member is provided between the first vertical rod and the second vertical rod, the traction member includes a first sheath, a second sheath and a traction platform, the first sheath is nested on the outside of the first vertical rod, the second sheath is nested on the outside of the second vertical rod, the first sheath and the second sheath are respectively connected to the two ends of the traction platform; the traction member is simultaneously connected to the lifting drive member and the fixed rod.

[0012] The first, second, third, and fourth vertical rods are located at the four corners of the rectangular body frame and are arranged parallel to each other. The traction platform is located between the first and second vertical rods. The traction platform, driven by a lifting drive, can drive the fixed rod and the unwinding shaft to rise and fall. The traction platform, located between the first and second vertical rods, can smoothly rise and fall and slide via the first and second sheaths, thereby driving the unwinding shaft to smoothly rise and fall and slide, thereby improving the stability of the unwinding shaft at different heights.

[0013] In a preferred technical solution of the present invention, the fixing rod is arranged parallel to the first sheath or the second sheath and is fixedly connected.

[0014] In the present application, the fixed rod is parallel to the first sheath or the second sheath, that is, the fixed rod is arranged in parallel with the first vertical rod or the second vertical rod, and the fixed rod needs to be arranged on the side of the first vertical rod or the second vertical rod away from the frame body. In fact, the fixed rod can be fixedly connected to any position in the traction member, and the traction member can realize the lifting and lowering driving effect of the fixed rod. In actual operation, since the unwinding trolley rotates around the workpiece, in order to make the wrapping efficiency higher, the unwinding shaft is preferably arranged between the unwinding trolley and the workpiece, that is, the unwinding shaft is preferably fixedly connected to the first sheath or the second sheath, and is extended relative to the body frame toward the workpiece. This ensures that when the body frame rotates around the workpiece, the unwinding shaft is closest to the outside of the workpiece, thereby achieving efficient wrapping.

[0015] In a preferred technical solution of the present invention, the lifting drive component includes a fixed pulley, a winding and a lifting platform, one end of the winding is fixedly connected to the fixed rod, and the other end of the winding is passed around the fixed pulley and fixedly connected to the lifting platform; the two ends of the lifting platform are respectively slidably connected to the third vertical rod and the fourth vertical rod.

[0016] In the present application, the lifting platform disposed between the third and fourth vertical rods can smoothly rise and fall and slide along the third and fourth vertical rods. The lifting and lowering of the lifting platform is transmitted to the traction platform via the fixed pulley and winding, thereby driving the traction platform to rise and fall and slide along the first and second vertical rods. The present application simplifies the drive relationship between the traction platform and the lifting platform through the coordination of the fixed pulley assembly and the winding, avoiding the need for a cumbersome drive device to drive the traction platform up and down. This has the advantages of reduced energy consumption, ease of operation, simple structure, and reasonable wiring.

[0017] In a preferred technical solution of the present invention, the two ends of the lifting platform are respectively nested in the third vertical rod and the fourth vertical rod through the third sheath and the fourth sheath, and the lifting platform includes a handheld frame and a counterweight frame, and the counterweight frame is located below the handheld frame.

[0018] The third and fourth sheaths can smoothly drive the lifting platform to rise and slide along the third and fourth vertical rods. Limiters can also be set at the top or bottom of the third and fourth sheaths. The limiters have the function of opening and locking. During the process of adjusting the height of the lifting platform, the limiters are opened without interfering with the vertical interaction of the lifting platform. When the height of the lifting platform is fixed, the limiters are locked, so that at the height, the unwinding trolley drives the unwinding shaft to rotate around the workpiece once, achieving wrapping of the outer side of the workpiece at that height.

[0019] In this application, the lifting platform can be subdivided into a handheld frame and a counterweight frame, wherein the counterweight frame is located below the handheld frame, and the handheld frame is the position where the operator holds the handheld frame. The counterweight frame has a certain weight and is arranged below the handheld frame. When the handheld frame needs to be lowered, that is, the handheld frame needs to be lowered and the traction platform is driven to rise synchronously, the gravity of the counterweight frame itself can be used to reduce the force applied to the handheld frame, so that the operator's force on the handheld frame is reduced, and the difficulty of controlling the lifting platform is reduced.

[0020] In a preferred technical solution of the present invention, the top ends of the first vertical rod and the second vertical rod are connected by a first cross rod, the top ends of the third vertical rod and the fourth vertical rod are connected by a second cross rod, a first fixed pulley is provided in the first cross rod, a second fixed pulley is provided in the second cross rod, a third fixed pulley is provided in the traction platform, and a fourth fixed pulley is provided in the lifting platform, and the winding passes through the third fixed pulley, the first fixed pulley, the second fixed pulley and the fourth fixed pulley in sequence to form a circular winding.

[0021] In the present application, the total length of the circulating winding is fixed. When the lifting platform is raised along the third and fourth vertical rods, the force of the circulating winding and the fixed pulley can drive the traction platform to descend along the first and second vertical rods. When the lifting platform is descended along the third and fourth vertical rods, the force of the circulating winding and the fixed pulley can drive the traction platform to rise along the first and second vertical rods. Through the relationship between the fixed pulley and the circulating winding, the present application can ensure that the lifting platform and the traction platform can slide up and down stably, and the lifting drive has a simple structure and simple wiring, and can achieve all-round coating of the workpiece from top to bottom or from bottom to top without additional energy consumption.

[0022] In a preferred technical solution of the present invention, a first rotary joint is provided at the top and bottom ends of the unwinding shaft respectively, a second rotary joint is provided at both ends of the fixed rod respectively, and the first rotary joint and the second rotary joint are connected through the fixed rod.

[0023] In the present application, a first rotary joint and a second rotary joint are respectively provided in the unwinding shaft and the fixed rod, wherein the second rotary joint fixed in the fixed rod can drive the unwinding shaft to swing during the rotation process, so that unwinding at different angles can be achieved. At the same time, there are two second rotary joints, and there are also two first rotary joints connected to the second rotary joints. By rotating the two second rotary joints at the top and bottom ends of the fixed rod, the unwinding shaft can be stably driven to swing to different positions, thereby achieving unwinding at different angles. For example, when the second rotary joint rotates clockwise, it can drive the unwinding shaft to swing in the clockwise direction, thereby changing the relative position relationship between the unwinding shaft and the vehicle frame to adapt to the outer wrapping of workpieces of different sizes and models.

[0024] In a preferred technical solution of the present invention, limit rings are respectively provided at the top and bottom ends of the unwinding shaft.

[0025] The limit ring is used to limit the position of the unwinding film at both ends, and the height of the limit ring in the unwinding shaft can be adjusted. When the unwinding film needs to be replaced, only the limit ring at one end needs to be removed and the unwinding film can be reinstalled. The position of the limit ring can also be changed according to the height of the unwinding film, which can be used to limit the position of unwinding films of different heights and sizes. It also ensures that the unwinding film does not shift during the rotation and unwinding process, improving the accuracy of the unwinding film.

[0026] The beneficial effects of the utility model are:

[0027] The utility model provides a film unwinding and winding device, comprising an unwinding trolley and an unwinding assembly, wherein the unwinding assembly is fixedly connected to the unwinding trolley, the unwinding assembly comprising an unwinding shaft, and a packaging film is nested on the unwinding shaft; casters are provided at the bottom of the unwinding trolley, and the casters can drive the unwinding trolley to move. When winding the film around the outside of the product, the unwinding trolley can drive the unwinding assembly to rotate around the workpiece, and at the same time, one end of the packaging film is fixed to the product. During the rotation of the unwinding trolley, the packaging film on the unwinding shaft can be covered on the outside of the workpiece. The principle of this application is that the workpiece is fixed, and the unwinding trolley drives the unwinding shaft to rotate around the workpiece, so that the outside of the workpiece is wrapped with packaging film, thereby avoiding the defects of manual unwinding by holding the unwinding shaft, and also avoiding the inconvenience caused by the need to move or rotate the workpiece, simplifying the structure of the unwinding and winding device, and improving the film winding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the left side of the film unwinding device;

[0029] Figure 2 It is a side view of the film unwinding device;

[0030] Figure 3It is a schematic diagram of the right side of the film unwinding device;

[0031] Figure 4 It is a schematic diagram of the connection between the unwinding shaft and the fixed rod;

[0032] Figure 5 It is a structural diagram of the traction member;

[0033] Figure 6 This is a schematic diagram of the lifting platform;

[0034] Figure 7 Schematic diagram of the overall structure of the fixed pulley and winding;

[0035] Figure 8 It is a top view of the fixed pulley and winding;

[0036] Reference numerals:

[0037] 11. First vertical rod; 12. Second vertical rod; 13. Third vertical rod; 14. Fourth vertical rod; 15. First crossbar; 16. Second crossbar; 17. Caster; 21. First sheath; 22. Second sheath; 23. Third sheath; 24. Fourth sheath; 25. Towing platform; 26. Handheld frame; 27. Counterweight frame; 31. First fixed pulley; 32. Second fixed pulley; 33. Third fixed pulley; 34. Fourth fixed pulley; 35. Steering pulley; 36. Winding; 50. Fixed rod; 51. Unwinding shaft; 52. Packaging film; 53. First rotary joint; 54. Second rotary joint; 55. Connecting rod. DETAILED DESCRIPTION

[0038] The following describes preferred embodiments of the present invention in more detail with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0039] The terms used in this utility model are for the purpose of describing specific embodiments only and are not intended to limit the utility model. As used in this utility model and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0040] It should be understood that although the terms "first", "second", "third", etc. may be used in the present invention to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0041] Example 1

[0042] like Figures 1-8 As shown, the present embodiment provides a film unwinding device, comprising an unwinding trolley and an unwinding assembly, wherein casters 17 are provided at the bottom of the unwinding trolley, the unwinding assembly is fixedly connected to the unwinding trolley, the unwinding assembly comprises an unwinding shaft 51, and a packaging film 52 is nested on the unwinding shaft 51; the unwinding trolley can drive the unwinding assembly to rotate around the workpiece, so that the packaging film 52 on the unwinding shaft 51 covers the outside of the workpiece.

[0043] In the present application, the unwinding assembly is fixed to the side of the unwinding trolley, and the unwinding assembly includes an unwinding shaft 51, on which a packaging film 52 is nested; the bottom of the unwinding trolley is provided with casters 17, which can drive the unwinding trolley to move. When wrapping the film around the outside of the product, the unwinding trolley can drive the unwinding assembly to rotate around the workpiece, and at the same time, one end of the packaging film 52 is fixed to the product. During the rotation of the unwinding trolley, the packaging film 52 on the unwinding shaft 51 can be covered on the outside of the workpiece. The principle of the present application is that the workpiece is fixed, and the unwinding trolley drives the unwinding shaft 51 to rotate around the workpiece, so that the outside of the workpiece is wrapped with the packaging film 52. This avoids the manual operation defects of unwinding by holding the unwinding shaft 51, and also avoids the inconvenience caused by the need to move or rotate the workpiece, simplifies the structure of the unwinding and film winding device, and improves the film winding efficiency.

[0044] The unwinding trolley of the present application is small in size and easy to move by casters 17, and is particularly suitable for wrapping film around large workpieces that are large in size and weight and difficult to move. The specific packaging film 52 can be made of waterproof material and wrapped around the outside of the workpiece to prevent the workpiece from being eroded by rainwater.

[0045] In the present application, the caster 17 at the bottom of the unwinding trolley can be a universal wheel, which can rotate in all directions, so that the moving trajectory of the unwinding trolley is adapted to the shape of the workpiece and can move around the outer circumference of the product.

[0046] The present application can use manual means to drive the unwinding trolley to rotate. The operator holds the unwinding trolley to move it, and controls the rotation direction of the caster 17 at the corner of the workpiece so that the unwinding trolley can turn smoothly at the corner of the workpiece to fit the shape of the outer peripheral side of the workpiece.

[0047] The present application can also design an automatic drive mode to drive the unwinding trolley to rotate. Specifically, the drive component is integrated inside the unwinding trolley, and the drive component is used to drive the movement trajectory of the caster 17. The movement trajectory can be designed according to the outer shape of the product, so that the unwinding trolley can turn smoothly at the corner of the workpiece to fit the outer shape of the workpiece.

[0048] Example 2

[0049] like Figures 1-8 As shown, the present embodiment provides a film unwinding device, comprising an unwinding trolley and an unwinding assembly, wherein casters 17 are provided at the bottom of the unwinding trolley, the unwinding assembly is fixedly connected to the unwinding trolley, the unwinding assembly comprises an unwinding shaft 51, and a packaging film 52 is nested on the unwinding shaft 51; the unwinding trolley can drive the unwinding assembly to rotate around the workpiece, so that the packaging film 52 on the unwinding shaft 51 covers the outside of the workpiece.

[0050] The unwinding trolley includes a frame body, in which a fixing rod 50 is provided. The unwinding shaft 51 is arranged parallel to the fixing rod 50 , and two ends of the unwinding shaft 51 are fixedly connected to two ends of the fixing rod 50 respectively.

[0051] In the present application, the vehicle frame can be of any shape, such as a cuboid, a cylinder or other irregular shapes, wherein a fixed rod 50 is provided on the edge of the vehicle frame, and the fixed rod 50 can be specifically a vertical rod-shaped structure, and the unwinding shaft 51 is provided in parallel with the fixed rod 50 and also extends in the vertical direction, and the packaging film 52 can be specifically a roll-shaped structure, and the center of the roll packaging film 52 is nested on the unwinding shaft 51. The vertically arranged unwinding shaft 51 and the fixed rod 50 can ensure that the maximum area of ​​the unwinding film is wrapped on the outside of the workpiece, and the unwinding shaft 51 can be suspended on the outside of the unwinding trolley through the fixed rod 50. In this way, when wrapping the product, it is only necessary to move the side where the fixed rod 50 is located close to the workpiece to make the unwinding shaft 51 fit closely with the workpiece, and then the unwinding trolley drives the unwinding film to unwind and wrap.

[0052] Furthermore, a lifting drive component is also provided in the frame body, and the output end of the lifting drive component is connected to the fixing rod 50.

[0053] The lifting drive can drive the fixed rod 50 to lift in the vertical direction, and the fixed rod 50 and the unwinding shaft 51 are fixedly connected, so that the lifting drive can drive the fixed rod 50 and the unwinding shaft 51 to lift. For workpieces with a larger height, the lifting drive can achieve wrapping at different heights of the workpiece. In actual operation, the height of the unwinding shaft 51 can be adjusted by the lifting drive to achieve wrapping of the workpiece from top to bottom or from bottom to top. The lifting drive is integrated inside the unwinding trolley, which simplifies the structure of the unwinding film device and can also be used for wrapping workpieces of different heights, which helps to improve the scope of application of the device of the present application.

[0054] It should be noted that wrapping from bottom to top here means wrapping the bottom of the workpiece once, then the lifting assembly drives the unwinding shaft 51 to an unwrapped position, the unwinding trolley drives the unwinding product once to wrap the outer periphery at that height, and then the lifting assembly moves the unwinding shaft 51 to the next unwrapped position, and so on, to achieve a circle of wrapping from bottom to top on the outer periphery of the workpiece. The same principle applies to wrapping from top to bottom, which requires wrapping around the workpiece once, and then the lifting drive component drives the unwinding shaft 51 down.

[0055] It should be noted that in the present application, the packaging film 52 has a certain height in the vertical direction, that is, it can wrap a certain range on the outside of the workpiece. Therefore, the distance that the lifting drive component drives the unwinding shaft 51 to rise or fall each time can be slightly smaller than the height of the packaging film 52. In this way, the next wrapping can overlap with the edge of the previous wrapping, realizing the wrapping of the product without dead angles and omissions, and improving the sealing of the wrapping on the outside of the workpiece.

[0056] Furthermore, the frame body of the present application is a rectangular frame, and the frame body includes a first vertical rod 11, a second vertical rod 12, a third vertical rod 13 and a fourth vertical rod 14 arranged in parallel, and a traction member is provided between the first vertical rod 11 and the second vertical rod 12, and the traction member includes a first sheath 21, a second sheath 22 and a traction platform 25, the first sheath 21 is nested on the outside of the first vertical rod 11, and the second sheath 22 is nested on the outside of the second vertical rod 12, and the first sheath 21 and the second sheath 22 are respectively connected to the two ends of the traction platform 25; the traction member is simultaneously connected to the lifting drive member and the fixed rod 50.

[0057] The first vertical rod 11, the second vertical rod 12, the third vertical rod 13, and the fourth vertical rod 14 are respectively located at the four corners of the rectangular body frame and are arranged parallel to each other. A traction platform 25 is located between the first vertical rod 11 and the second vertical rod 12. Under the action of the lifting drive, the traction platform 25 can drive the fixed rod 50 and the unwinding shaft 51 to rise and fall. The traction platform 25, which is located between the first vertical rod 11 and the second vertical rod 12, can smoothly rise and fall and slide through the first and second sheaths 21 and 22, thereby driving the unwinding shaft 51 to smoothly rise and fall and slide, thereby improving the stability of the unwinding shaft 51 at different heights.

[0058] Furthermore, the fixing rod 50 is arranged parallel to the first sheath 21 or the second sheath 22 and is fixedly connected thereto.

[0059] In the present application, the fixed rod 50 is parallel to the first sheath 21 or the second sheath 22, that is, the fixed rod 50 is arranged parallel to the first vertical rod 11 or the second vertical rod 12, and the fixed rod 50 needs to be arranged on the side of the first vertical rod 11 or the second vertical rod 12 away from the frame body. In fact, the fixed rod 50 can be fixedly connected to any position in the traction member, and the traction member can realize the lifting and lowering driving effect of the fixed rod 50. In actual operation, since the unwinding trolley rotates around the workpiece, in order to make the wrapping efficiency higher, the unwinding shaft 51 is preferably arranged between the unwinding trolley and the workpiece, that is, the unwinding shaft 51 is preferably fixedly connected to the first sheath 21 or the second sheath 22, and is extended relative to the body frame toward the workpiece. This ensures that when the body frame rotates around the workpiece, the unwinding shaft 51 is closest to the outside of the workpiece, thereby achieving efficient wrapping.

[0060] Furthermore, the lifting drive component described in the present application includes a fixed pulley, a winding 36 and a lifting platform, one end of the winding 36 is fixedly connected to the fixed rod 50, and the other end of the winding 36 passes around the fixed pulley and is fixedly connected to the lifting platform; the two ends of the lifting platform are respectively slidably connected to the third vertical rod 13 and the fourth vertical rod 14.

[0061] In the present application, the lifting platform disposed between the third vertical rod 13 and the fourth vertical rod 14 can smoothly rise and fall and slide along the third vertical rod 13 and the fourth vertical rod 14. The lifting and lowering of the lifting platform is transmitted to the traction platform 25 via the fixed pulley and the winding, thereby driving the traction platform 25 to rise and fall and slide along the first vertical rod 11 and the second vertical rod 12. The present application simplifies the driving relationship between the traction platform 25 and the lifting platform through the coordination of the fixed pulley assembly and the winding, avoiding the need for a cumbersome driving device to drive the traction platform 25 up and down, thereby having the advantages of reduced energy consumption, easy operation, simple structure, and reasonable wiring.

[0062] As another embodiment, the lifting drive component can also be set to a drive mode of a servo motor, a reduction gearbox, a chain, and a sprocket. The lifting height of the traction platform 25 can be accurately controlled by the operation of the servo motor, but the structure is more complicated and the cost is higher.

[0063] Furthermore, both ends of the lifting platform are respectively nested in the third vertical rod 13 and the fourth vertical rod 14 through a third sheath 23 and a fourth sheath 24 . The lifting platform includes a handheld frame 26 and a counterweight frame 27 . The counterweight frame 27 is located below the handheld frame 26 .

[0064] The third and fourth sheaths 23 and 24 can smoothly drive the lifting platform to move up and down and slide along the third and fourth vertical rods 13 and 14. A limiter can also be provided at the top or bottom of the third and fourth sheaths 23 and 24. The limiter has the function of opening and locking. During the adjustment of the height of the lifting platform, the limiter is opened without interfering with the upward and downward interaction of the lifting platform. When the height of the lifting platform is fixed, the limiter is locked, so that at the height, the unwinding trolley drives the unwinding shaft 51 to rotate around the workpiece once, thereby wrapping the outer peripheral side of the workpiece at that height.

[0065] In the present application, the lifting platform can be subdivided into a handheld frame 26 and a counterweight frame 27, wherein the counterweight frame 27 is located below the handheld frame 26, which is the position where the operator holds the handheld frame. The counterweight frame 27 has a certain weight and is arranged below the handheld frame 26. When the handheld frame 26 needs to be lowered, that is, the handheld frame 26 needs to be lowered and the traction platform 25 needs to be raised simultaneously, the gravity of the counterweight frame 27 itself can be used to reduce the force applied to the handheld frame 26, so that the operator's force on the handheld frame 26 is reduced, and the difficulty of controlling the lifting platform is reduced.

[0066] In the present application, the top and bottom ends of the unwinding shaft 51 are respectively provided with a first rotary joint 53 , and the two ends of the connecting rod 55 are respectively provided with a second rotary joint 54 , and the first rotary joint 53 and the second rotary joint 54 are connected by the connecting rod 55 .

[0067] The present application adjusts the distance between the unwinding shaft 51 and the unwinding trolley by adjusting the length of the connecting rod 55, allowing the unwinding shaft 51 to be suspended and externally positioned at different distances from the unwinding trolley. The specific length of the connecting rod 55 can be determined based on the dimensions of the unwinding trolley and the workpiece. This ensures that when the trolley frame rotates around the workpiece, the unwinding shaft 51 is located between the trolley frame and the workpiece, achieving more efficient lamination.

[0068] In the present application, the packaging film 52 is nested on the outside of the unwinding shaft 51. During the unwinding process, since one end of the packaging film 52 is fixed on the outside of the workpiece, when the unwinding trolley drives the packaging film 52 to rotate around the workpiece, the rolled packaging film 52 nested on the outside of the unwinding shaft 51 will rotate, so that the packaging film 52 is released and wrapped around the outside of the workpiece.

[0069] In the present application, a first rotary joint 53 and a second rotary joint 54 are respectively provided in the unwinding shaft 51 and the fixed rod 50, wherein the second rotary joint 54 fixed in the fixed rod 50 can drive the unwinding shaft 51 to swing during the rotation process, so that unwinding at different angles can be achieved. At the same time, there are two second rotary joints 54, and there are also two first rotary joints 53 connected to the second rotary joints 54. By rotating the two second rotary joints 54 at the top and bottom ends of the fixed rod 50, the unwinding shaft 51 can be stably driven to swing to different positions, thereby achieving unwinding at different angles. For example, when the second rotary joint 54 rotates clockwise, it can drive the unwinding shaft 51 to swing in the clockwise direction, thereby changing the relative position relationship between the unwinding shaft 51 and the vehicle frame to adapt to the outer wrapping of workpieces of different sizes and models.

[0070] The top and bottom ends of the unwinding shaft 51 described in the present application are respectively provided with limit rings.

[0071] The limit rings are used to limit the position of both ends of the unwinding film, and their height within the unwinding shaft 51 is adjustable. When the unwinding film needs to be replaced, simply remove the limit ring at one end and reinstall the film. The position of the limit rings can also be adjusted according to the height of the unwinding film, allowing for positioning of unwinding films of different heights and sizes. Furthermore, the limit rings ensure that the unwinding film does not shift during rotation, improving the accuracy of the unwinding film.

[0072] Example 3

[0073] like Figures 1-8 As shown, the present embodiment provides a film unwinding device, comprising an unwinding trolley and an unwinding assembly, wherein casters 17 are provided at the bottom of the unwinding trolley, the unwinding assembly is fixedly connected to the unwinding trolley, the unwinding assembly comprises an unwinding shaft 51, and a packaging film 52 is nested on the unwinding shaft 51; the unwinding trolley can drive the unwinding assembly to rotate around the workpiece, so that the packaging film 52 on the unwinding shaft 51 covers the outside of the workpiece.

[0074] The unwinding trolley includes a frame body, in which a lifting drive is also provided. Specifically, the frame body includes a first vertical rod 11, a second vertical rod 12, a third vertical rod 13, and a fourth vertical rod 14 arranged in parallel. A traction member is provided between the first vertical rod 11 and the second vertical rod 12. The traction member includes a first sheath 21, a second sheath 22, and a traction platform 25. The first sheath 21 is nested outside the first vertical rod 11, and the second sheath 22 is nested outside the second vertical rod 12. The first sheath 21 and the second sheath 22 are respectively connected to the two ends of the traction platform 25. The traction member is also connected to the lifting drive and the fixed rod 50.

[0075] The lifting drive component includes a fixed pulley, a winding 36 and a lifting platform. One end of the winding 36 is fixedly connected to the fixed rod 50, and the other end of the winding 36 is passed around the fixed pulley and fixedly connected to the lifting platform; the two ends of the lifting platform are respectively slidably connected to the third vertical rod 13 and the fourth vertical rod 14.

[0076] The top ends of the first vertical rod 11 and the second vertical rod 12 are connected by a first cross rod 15, and the top ends of the third vertical rod 13 and the fourth vertical rod 14 are connected by a second cross rod 16. A first fixed pulley 31 is provided in the first cross rod 15, and a second fixed pulley 32 is provided in the second cross rod 16. A third fixed pulley 33 is provided in the traction platform 25, and a fourth fixed pulley 34 is provided in the lifting platform. The winding 36 passes through the third fixed pulley 33, the first fixed pulley 31, the second fixed pulley 32 and the fourth fixed pulley in sequence to form a circulating winding.

[0077] In the present application, the total length of the circulating winding is fixed. When the lifting platform is raised along the third vertical rod 13 and the fourth vertical rod 14, the force of the circulating winding and the fixed pulley can drive the traction platform 25 to descend along the first vertical rod 11 and the second vertical rod 12. When the lifting platform is descended along the third vertical rod 13 and the fourth vertical rod 14, the force of the circulating winding and the fixed pulley can drive the traction platform 25 to rise along the first vertical rod 11 and the second vertical rod 12. Through the relationship between the fixed pulley and the circulating winding, the present application can ensure that the lifting platform and the traction platform 25 can slide up and down stably. The lifting drive has a simple structure and simple wiring, and can achieve all-round coating of the workpiece from top to bottom or from bottom to top without additional energy consumption.

[0078] In order to ensure that the circular winding can rotate stably around the fixed pulley, the number of the first fixed pulley 31, the second fixed pulley 32, the third fixed pulley 33 and the fourth fixed pulley 34 in the present application can be set to multiple, and the multiple fixed pulleys are evenly distributed in the horizontal direction in sequence, ensuring that the points of action of the circular winding 36 are distributed at different positions of the lifting platform and the traction platform 25, thereby improving the force stability of the lifting platform and the traction platform 25.

[0079] As a specific embodiment, Figure 7 and Figure 8 As shown, there are two third fixed pulleys 33, evenly distributed on both sides of the traction platform 25. There are four first fixed pulleys 31, evenly distributed in the first crossbar 15. There are four second fixed pulleys 32, evenly distributed in the second crossbar 16. There are two fourth fixed pulleys 34, evenly distributed on both sides of the lifting platform.

[0080] A steering pulley 35 is provided between the outermost first fixed pulley 31 and the second fixed change pulley. There are four steering change pulleys, which are respectively arranged at both ends of the first cross bar 15 and the second cross bar 16, and are used to turn the winding 36 in the vertical direction to the horizontal direction, thereby realizing a horizontal transition connection of the winding 36 between the first cross bar 15 and the second cross bar 16.

[0081] The winding 36 passes through the third fixed pulley 33, the first fixed pulley 31, the second fixed pulley 32 and the fourth fixed pulley in sequence to form a circular winding, and the circular winding is a closed winding 36 with a fixed length, ensuring that the rise of the lifting platform corresponds to the descent of the traction platform 25, and the descent of the lifting platform corresponds to the rise of the traction platform 25.

[0082] The main structure of the vehicle body frame in this application adopts the third-generation lean tube made of aluminum alloy and its lean tube connecting joints, which not only ensures the lightweight design of the overall structure of the unwinding trolley, but also has a certain structural strength.

[0083] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures. In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0084] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0085] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A film unwinding device, characterized in that: The invention comprises an unwinding trolley and an unwinding assembly, wherein a caster (17) is provided at the bottom of the unwinding trolley, and the unwinding assembly is fixedly connected to the unwinding trolley. The unwinding assembly comprises an unwinding shaft (51), and a packaging film (52) is nested on the unwinding shaft (51); the unwinding trolley can drive the unwinding assembly to rotate around a workpiece, so that the packaging film (52) on the unwinding shaft (51) covers the outside of the workpiece.

2. The film unwinding device according to claim 1, characterized in that: The unwinding trolley comprises a frame body, a fixing rod (50) is provided in the frame body, the unwinding shaft (51) is arranged parallel to the fixing rod (50), and the two ends of the unwinding shaft (51) are respectively fixedly connected to the two ends of the fixing rod (50).

3. The film unwinding device according to claim 2, characterized in that: A lifting drive member is also provided in the frame body, and an output end of the lifting drive member is connected to the fixing rod (50).

4. The film unwinding device according to claim 3, characterized in that: The frame body is a rectangular parallelepiped frame, and the frame body comprises a first vertical rod (11), a second vertical rod (12), a third vertical rod (13) and a fourth vertical rod (14) arranged in parallel, a traction member is arranged between the first vertical rod (11) and the second vertical rod (12), and the traction member comprises a first sheath (21), a second sheath (22) and a traction platform (25), the first sheath (21) is nested outside the first vertical rod (11), the second sheath (22) is nested outside the second vertical rod (12), the first sheath (21) and the second sheath (22) are respectively connected to two ends of the traction platform (25); the traction member is simultaneously connected to the lifting drive member and the fixing rod (50).

5. The film unwinding device according to claim 4, characterized in that: The fixing rod (50) is arranged in parallel with the first sheath (21) or the second sheath (22) and is fixedly connected.

6. The film unwinding device according to claim 4, characterized in that: The lifting drive component includes a fixed pulley, a winding wire (36) and a lifting platform. One end of the winding wire (36) is fixedly connected to the fixed rod (50), and the other end of the winding wire (36) passes around the fixed pulley and is fixedly connected to the lifting platform. The two ends of the lifting platform are respectively slidably connected to the third vertical rod (13) and the fourth vertical rod (14).

7. The film unwinding device according to claim 6, characterized in that: The two ends of the lifting platform are respectively nested in the third vertical rod (13) and the fourth vertical rod (14) through a third sheath (23) and a fourth sheath (24). The lifting platform comprises a handheld frame (26) and a counterweight frame (27). The counterweight frame (27) is located below the handheld frame (26).

8. The film unwinding device according to claim 6, characterized in that: The top ends of the first vertical rod (11) and the second vertical rod (12) are connected via a first crossbar (15), the top ends of the third vertical rod (13) and the fourth vertical rod (14) are connected via a second crossbar (16), a first fixed pulley (31) is provided in the first crossbar (15), a second fixed pulley (32) is provided in the second crossbar (16), a third fixed pulley (33) is provided in the traction platform (25), and a fourth fixed pulley (34) is provided in the lifting platform, and the winding (36) passes through the third fixed pulley (33), the first fixed pulley (31), the second fixed pulley (32) and the fourth fixed pulley in sequence to form a circulating winding.

9. The film unwinding device according to claim 2, characterized in that: The top and bottom ends of the unwinding shaft (51) are respectively provided with first rotary joints (53), and the two ends of the fixing rod (50) are respectively provided with second rotary joints (54), and the first rotary joint (53) and the second rotary joint (54) are connected by a connecting rod (55).

10. The film unwinding device according to claim 1, characterized in that: The top and bottom ends of the unwinding shaft (51) are respectively provided with limiting rings.

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