Coil unloading device of plastic film winding roller

Abstract

The utility model relates to the field of winding machines, discloses a coil unloading device of a plastic film winding roller, and aims to solve the problems that in the conventional technology, when the winding roller is manually unloaded, when the plastic film coiling scale is larger, the unloaded coil is heavier, meanwhile, the wound material coil needs to be unloaded from a high position, the operation is strenuous, and potential safety hazards also exist. The base is arranged at the top of the box body, the threaded block is used in cooperation with the first sliding groove and the threaded rod at the same time, the sliding block is used in cooperation with the second sliding groove, the clamping groove is used in cooperation with the buckle, the threaded block, the first fixed block, the sliding block, the second fixed block, the first movable rod, the second movable rod and the pin shaft act in a matched mode, and the winding roller is fixedly connected with the buckle. And after the plastic film is rolled, the winding roller can be conveniently detached, so that time and labor are saved, the labor cost is reduced, potential safety hazards are reduced, and the practicability of the plastic film winding machine is improved.

Description

Technical Field

[0001] The utility model relates to the field of winding machines, in particular to an unwinding device for a plastic film winding roller. Background Art

[0002] The material receiving part of the coil processing production line mechanically reels the raw materials into coils. It is widely used in paper rolls, cloth rolls, plastic rolls, and metal coil processing production lines. The design is diversified according to the actual process requirements. Common ones include simple rewinders and hydraulic rewinders. Rewinders generally have strict requirements on the inner diameter, outer diameter, thickness, and width of the material.

[0003] In the production process of plastic film, the plastic film is wound by a winder. The common technology is to put the core shaft on the winding roller, and the winding roller rotates to wind the plastic film. When the roll reaches the winding length, the winding roller is manually removed. When the plastic film roll is large, the weight of the unloaded roll is heavy. At the same time, the wound material roll needs to be unloaded from a high position, which is laborious to operate, increases labor costs, and also poses a safety hazard. Utility Model Content

[0004] The utility model aims to solve the technical problem that the plastic film is too heavy to be unrolled by a winding roller after being rolled, and provides an unrolling device for the plastic film winding roller, so as to timely unload the plastic film and the winding roller which are too heavy and difficult to carry.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The unwinding device of the plastic film winding roller comprises a box body, a frame, a base, a first motor, a threaded rod, a first slide, a threaded block, a first fixed block, a second slide, a slider, a second fixed block, a first movable rod, a second movable rod, a pin shaft, a second motor, a transmission rod, a pull rod, a limit nut, two slots, a winding roller, two buckles, and a controller. The box body is a box-shaped structure with an opening at the top, and the interior of the box body is connected to the outside world. The frame is a door-shaped structure, the frame is arranged above the box body, the bottom of the frame is fixedly connected to the top of the box body, and the interior of the frame is connected to the outside world. The base is a square metal plate, which is horizontally arranged at the top of the box body and fits with the opening at the top of the box body. The first motor is arranged inside the box body, the first motor shaft is horizontally arranged in the long side direction of the box body, and the bottom of the first motor is fixedly connected to the inner surface of the box body. The threaded rod is horizontally arranged on the side of the first motor, and the axial direction coincides with the axial direction of the first motor shaft, and the side end of the threaded rod is fixedly connected to the first motor shaft. The first chute is transversely arranged at the bottom of the inner cavity of the box body and is arranged below the threaded rod. The notch of the first chute is connected with the inner cavity of the box body. The threaded block is arranged through the upper part of the first chute. The bottom of the threaded block is slidably connected with the inner wall of the first chute. The inner wall of the threaded block is connected with the surface of the threaded rod by threads. The threaded block is used in conjunction with the first chute and the threaded rod at the same time. The first fixed block is arranged inside the box body. The direction of the line connecting the first fixed block and the threaded block coincides with the direction of the axis of the threaded rod. The bottom of the first fixed block is fixedly connected with the inner surface of the box body. The second chute is transversely arranged at the lower part of the base and is arranged above the threaded rod. The notch of the second chute is connected with the outside. The slider is arranged through the lower part of the second chute. The top of the slider is slidably connected with the inner wall of the second chute. The slider is used in conjunction with the second chute. The second fixed block is arranged below the base. The direction of the line connecting the second fixed block and the slider is parallel to the direction of the axis of the threaded rod. The top of the second fixed block is fixedly connected with the bottom of the base. The first movable rod is arranged below the base. The lower end of the first movable rod is hinged with the threaded block, and the upper end is hinged with the second fixed block. The second movable rod is arranged below the base, the lower end of the second movable rod is hinged to the first fixed block, and the upper end is hinged to the slider. A pin is arranged between the first movable rod and the second movable rod, and the first movable rod and the second movable rod are movably connected through the pin. The second motor is arranged transversely on the side of the frame, the second motor shaft passes through the side of the frame transversely, and the axis direction is parallel to the axis direction of the threaded rod, and the side of the second motor is fixedly connected to the side of the frame. The transmission rod is arranged transversely inside the frame and on the side of the second motor, the axis direction of the transmission rod coincides with the axis direction of the second motor shaft, and the side end of the transmission rod is fixedly connected to the second motor shaft. The pull rod is arranged transversely through the side of the frame away from the second motor, the axis direction of the pull rod coincides with the axis direction of the second motor shaft, and the outer wall of the pull rod is slidably connected to the inner wall of the frame where it passes through. The limit nut is arranged inside the frame and outside the pull rod, and the inner wall of the limit nut is threadedly connected to the outer wall of the pull rod. The two slots are respectively arranged at the side end of the transmission rod away from the second motor and the side end of the pull rod close to the second motor. The two slot sides are respectively fixedly connected to the side end of the transmission rod and the side end of the pull rod, and the connecting direction of the two slots coincides with the direction of the second motor shaft.The winding roller is of an inflatable shaft type. The winding roller is transversely arranged on the side of the transmission rod away from the second motor, and the axis direction coincides with the axis direction of the second motor shaft. Two buckles are respectively arranged on the side end of the winding roller away from the second motor and the side end close to the second motor. The two buckle sides are respectively fixedly connected to the two ends of the winding roller and are respectively tightly attached to the two slot sides. The connection direction of the two buckles coincides with the direction of the second motor shaft. The controller is arranged on the side of the frame away from the second motor. The side of the controller is fixedly connected to the side of the frame. The controller is electrically connected to the first motor, the second motor, and the winding roller.

[0007] When the plastic film needs to be rolled up, the staff loosens the limit nut and pulls the pull rod. The pull rod moves horizontally in the direction away from the winding roller and drives the card slot to release the buckle. The winding roller can be removed and the mandrel of the plastic film to be rolled up is passed through the winding roller. The limit nut is tightened in the reverse operation to clamp the buckle. The second motor is turned on by the controller and the winding roller is inflated. The winding roller clamps the mandrel to prevent position deviation during the winding of the plastic film. The second motor rotates the shaft to drive the transmission rod to rotate along the axis of the transmission rod. The transmission rod drives the card slot, buckle, and winding roller to rotate along the axis of the winding roller in turn. The winding roller then drives the mandrel to rotate along the axis of the mandrel to wind the plastic film into a roll. When the winding is completed, the staff turns off the second motor and deflates the winding roller through the controller. The second motor stops running and the winding roller releases the mandrel.

[0008] When it is necessary to unload the winding roller, the staff starts the first motor through the controller. The first motor runs the rotating shaft to drive the threaded rod to rotate along the axis direction of the threaded rod. The threaded rod drives the threaded block to move along the axis direction of the threaded rod close to the first fixed block. At the same time, the threaded block slides in the direction of the first slide groove. The threaded block drives the lower end of the first movable rod to move along the axis direction of the threaded rod close to the first fixed block. At the same time, it drives the pin shaft to move upward, the upper end of the first movable rod to move vertically upward, the upper end of the second movable rod to move upward and move horizontally relative to the base close to the second fixed block. The upper end of the first movable rod drives the second fixed block to move vertically upward, the upper end of the second movable rod drives the slider to move upward and slide in the direction of the second slide groove, the slider and the second fixed block drive the base to move vertically upward until it contacts the rolled plastic film. At the same time, the staff turns off the first motor through the controller. The staff loosens the limit nut and pulls the pull rod. The pull rod moves horizontally in the direction away from the winding roller and drives the slot to release the buckle. The buckle drives the winding roller out of the slot and acts on the base. Finally, the staff starts the first motor to reverse through the controller. Similarly, the base, slider, first movable rod, second movable rod, pin shaft, and threaded block return to the starting position, thus completing the unloading of the plastic film winding roller.

[0009] Furthermore, it comprises a fixed roller, which is arranged transversely inside the frame and above the winding roller, and both ends of the fixed roller are respectively fixedly connected to the top of the inner cavity of the frame.

[0010] The fixed roller can position the plastic film during the winding process to prevent the plastic film from deviating during winding.

[0011] Furthermore, the frame is fixed to the box body and the controller by welding.

[0012] Welding fixation can increase the stability of the structure.

[0013] Furthermore, the top surface of the base is wider than the bottom surface.

[0014] The wider top surface allows the base to overlap the top of the box, making the structure more stable.

[0015] Furthermore, the upper portion of the base is an arc-shaped notch.

[0016] The arc-shaped notch is more suitable for the plastic film to be rolled up, so as to prevent the plastic film from rolling during the movement.

[0017] Furthermore, lubricant is applied between the first sliding groove and the threaded block, and between the second sliding groove and the sliding block.

[0018] Applying lubricant makes the sliding between components smoother.

[0019] Beneficial effects of the utility model:

[0020] 1. The utility model can conveniently remove the winding roller after the plastic film is rolled up by arranging structures such as threaded rods, threaded blocks, sliders, first movable rods, second movable rods, pull rods, transmission rods, slots, buckles, and limit nuts, which saves time and effort, reduces labor costs, reduces safety hazards, and increases the practicality of the plastic film winder. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is a front view structural schematic diagram of a unwinding device of a plastic film winding roller.

[0022] Figure 2 The utility model is a front view cross-sectional structural schematic diagram of a reel unloading device of a plastic film reel.

[0023] Figure 3 The utility model is a schematic diagram of the structure of the clamping groove and the clamping buckle of the unwinding device of the plastic film winding roller.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. housing; 2. frame; 3. base; 4. first motor; 5. threaded rod; 6. first slide groove; 7. threaded block; 8. first fixed block; 9. second slide groove; 10. slider; 11. second fixed block; 12. first movable rod; 13. second movable rod; 14. pin shaft; 15. second motor; 16. transmission rod; 17. pull rod; 18. limit nut; 19. slot; 20. winding roller; 21. buckle; 22. fixed roller; 23. controller. DETAILED DESCRIPTION

[0025] The concept of the present invention and the technical effects produced will be clearly and completely described below in conjunction with the embodiments so as to fully understand the purpose, features and effects of the present invention.

[0026] like Figure 1, a roll unloading device for a plastic film winding roller 20, comprising a box body 1, a frame 2, a base 3, a first motor 4, a threaded rod 5, a first slide 6, a threaded block 7, a first fixed block 8, a second slide 9, a slider 10, a second fixed block 11, a first movable rod 12, a second movable rod 13, a pin 14, a second motor 15, a transmission rod 16, a pull rod 17, a limit nut 18, two card slots 19, a winding roller 20, two buckles 21, and a controller 23. The box body 1 is a box-shaped structure with an open top, and the inside of the box body 1 is connected to the outside. The frame 2 is a door-shaped structure, the frame 2 is arranged above the box body 1, the bottom of the frame 2 is fixedly connected to the top of the box body 1, and the inside of the frame 2 is connected to the outside. The base 3 is a square metal plate, which is horizontally arranged on the top of the box body 1 and fits with the top opening of the box body 1. The first motor 4 is arranged inside the box body 1, the rotating shaft of the first motor 4 is horizontally arranged in the long side direction of the box body 1, and the bottom of the first motor 4 is fixedly connected to the inner surface of the box body 1. The threaded rod 5 is transversely arranged on the side of the first motor 4, and the axial direction coincides with the axial direction of the rotating shaft of the first motor 4, and the side end of the threaded rod 5 is fixedly connected to the rotating shaft of the first motor 4. The first chute 6 is transversely arranged at the bottom of the inner cavity of the box body 1, and is arranged below the threaded rod 5, and the notch of the first chute 6 is connected to the inner cavity of the box body 1. The threaded block 7 is arranged through the upper part of the first chute 6, the bottom of the threaded block 7 is slidably connected to the inner wall of the first chute 6, the inner wall of the threaded block 7 is connected to the surface of the threaded rod 5 by threads, and the threaded block 7 is used in conjunction with the first chute 6 and the threaded rod 5. The first fixed block 8 is arranged inside the box body 1, and the direction of the line connecting the first fixed block 8 and the threaded block 7 coincides with the axial direction of the threaded rod 5, and the bottom of the first fixed block 8 is fixedly connected to the inner surface of the box body 1. The second chute 9 is transversely arranged at the lower part of the base 3, and is arranged above the threaded rod 5, and the notch of the second chute 9 is connected to the outside world. The slider 10 is arranged through the lower part of the second slide groove 9, and the top of the slider 10 is slidably connected to the inner wall of the second slide groove 9, and the slider 10 is used in conjunction with the second slide groove 9. The second fixed block 11 is arranged below the base 3, and the direction of the line connecting the second fixed block 11 and the slider 10 is parallel to the axial direction of the threaded rod 5, and the top of the second fixed block 11 is fixedly connected to the bottom of the base 3. The first movable rod 12 is arranged below the base 3, and the lower end of the first movable rod 12 is hinged to the threaded block 7, and the upper end is hinged to the second fixed block 11. The second movable rod 13 is arranged below the base 3, and the lower end of the second movable rod 13 is hinged to the first fixed block 8, and the upper end is hinged to the slider 10. A pin 14 is arranged between the first movable rod 12 and the second movable rod 13, and the first movable rod 12 and the second movable rod 13 are movably connected through the pin 14. The second motor 15 is arranged horizontally on the side of the frame 2, and the rotating shaft of the second motor 15 horizontally passes through the side of the frame 2, and the axial direction is parallel to the axial direction of the threaded rod 5, and the side of the second motor 15 is fixedly connected to the side of the frame 2. The transmission rod 16 is transversely arranged inside the frame 2 and is arranged on the side of the second motor 15 . The axial direction of the transmission rod 16 coincides with the axial direction of the shaft of the second motor 15 . The side end of the transmission rod 16 is fixedly connected to the shaft of the second motor 15 .The pull rod 17 is transversely penetrated and arranged on the side of the frame 2 away from the second motor 15, the axis direction of the pull rod 17 coincides with the axis direction of the second motor 15 shaft, and the outer wall of the pull rod 17 is slidably connected to the inner wall of the frame 2 where it passes through. The limit nut 18 is arranged inside the frame 2 and outside the pull rod 17, and the inner wall of the limit nut 18 is threadedly connected to the outer wall of the pull rod 17. Two slots 19 are respectively arranged on the side end of the transmission rod 16 away from the second motor 15 and the side end of the pull rod 17 close to the second motor 15, the sides of the two slots 19 are respectively fixedly connected to the side ends of the transmission rod 16 and the side ends of the pull rod 17, and the connecting direction of the two slots 19 coincides with the axis direction of the second motor 15 shaft. The winding roller 20 is an inflatable shaft type, and the winding roller 20 is transversely arranged on the side of the transmission rod 16 away from the second motor 15, and the axis direction coincides with the axis direction of the second motor 15 shaft. The two buckles 21 are respectively arranged at the side end of the winding roller 20 away from the second motor 15 and the side end close to the second motor 15. The sides of the two buckles 21 are respectively fixedly connected to the two ends of the winding roller 20 and are respectively in close contact with the sides of the two slots 19. The connecting direction of the two buckles 21 coincides with the direction of the rotating shaft of the second motor 15. The controller 23 is arranged on the side of the frame 2 away from the second motor 15. The side of the controller 23 is fixedly connected to the side of the frame 2. The controller 23 is respectively electrically connected to the first motor 4, the second motor 15, and the winding roller 20.

[0027] When the plastic film needs to be rolled up, the staff loosens the limit nut 18 and pulls the pull rod 17. The pull rod 17 moves horizontally in a direction away from the winding roller 20 and drives the slot 19 to release the buckle 21, so that the winding roller 20 can be removed, and the core shaft that needs to be rolled up of the plastic film passes through the winding roller 20, and the limit nut 18 is tightened in the reverse operation to clamp the buckle 21. The second motor 15 is turned on by the controller 23 and the winding roller 20 is inflated. The winding roller 20 clamps the core shaft to prevent position deviation during the winding process of the plastic film. The second motor 15 runs the rotating shaft to rotate and drive the transmission rod 16 to rotate along the axis direction of the transmission rod 16. The transmission rod 16 drives the slot 19, the buckle 21, and the winding roller 20 to rotate along the axis direction of the winding roller 20 in turn. The winding roller 20 then drives the core shaft to rotate along the axis direction of the core shaft to wind the plastic film into a roll. When the winding is completed, the staff turns off the second motor 15 and deflates the winding roller 20 through the controller 23, the second motor 15 stops running, and the winding roller 20 releases the core shaft.

[0028] When it is necessary to unload the winding roller 20, the staff starts the first motor 4 through the controller 23. The first motor 4 runs and the rotating shaft rotates to drive the threaded rod 5 to rotate along the axial direction of the threaded rod 5. The threaded rod 5 drives the threaded block 7 to move along the axial direction of the threaded rod 5 close to the first fixed block 8. At the same time, the threaded block 7 slides along the first slide groove 6. The threaded block 7 drives the lower end of the first movable rod 12 to move along the axial direction of the threaded rod 5 close to the first fixed block 8. At the same time, it drives the pin shaft 14 to move upward, the upper end of the first movable rod 12 to move vertically upward, and the upper end of the second movable rod 13 to move upward and move horizontally relative to the base 3 close to the second fixed block 11. The upper end of the first movable rod 12 drives the second fixed block 11 to move vertically upward, and the upper end of the second movable rod 13 drives the slider 10 to move upward and slide along the second slide groove 9. The slider 10 and the second fixed block 11 drive the base 3 to move vertically upward until it contacts the rolled plastic film. At the same time, the staff turns off the first motor 4 through the controller 23. The staff loosens the limit nut 18 and pulls the pull rod 17. The pull rod 17 moves horizontally in the direction away from the winding roller 20 and drives the slot 19 to release the buckle 21. The buckle 21 drives the winding roller 20 to disengage from the slot 19 and acts on the base 3. Finally, the staff starts the first motor 4 to reverse through the controller 23. Similarly, the base 3, the slider 10, the first movable rod 12, the second movable rod 13, the pin 14, and the threaded block 7 return to the starting position, thereby completing the unloading of the plastic film winding roller 20.

[0029] It includes a fixed roller 22 , which is transversely arranged inside the frame 2 and above the winding roller 20 , and both ends of the fixed roller 22 are fixedly connected to the top of the inner cavity of the frame 2 .

[0030] The fixed roller 22 can position the plastic film during the winding process to prevent the plastic film from deviating during the winding process.

[0031] The frame 2 is fixed to the box body 1 and the controller 23 by welding.

[0032] Welding fixation can increase the stability of the structure.

[0033] The top surface of the base 3 is wider than the bottom surface.

[0034] The wider top surface allows the base 3 to overlap the top of the box body 1, making the structure more stable.

[0035] The upper portion of the base 3 is an arc-shaped notch.

[0036] The arc-shaped notch is more suitable for the plastic film to be rolled up, so as to prevent the plastic film from rolling during the movement.

[0037] Lubricant is applied between the first slide groove 6 and the threaded block 7 , and between the second slide groove 9 and the sliding block 10 .

[0038] Applying lubricant makes the sliding between components smoother.

[0039] Working principle: when the plastic film needs to be rolled up, the staff loosens the limit nut 18 and pulls the pull rod 17. The pull rod 17 moves horizontally in the direction away from the winding roller 20 and drives the slot 19 to release the buckle 21, so that the winding roller 20 can be removed, and the core shaft that needs to be rolled up of the plastic film passes through the winding roller 20, and the limit nut 18 is tightened in the reverse operation to clamp the buckle 21. The second motor 15 is turned on by the controller 23 and the winding roller 20 is inflated. The winding roller 20 clamps the core shaft to prevent position deviation during the winding process of the plastic film. The second motor 15 rotates the shaft to drive the transmission rod 16 to rotate along the axis direction of the transmission rod 16. The transmission rod 16 drives the slot 19, the buckle 21, and the winding roller 20 to rotate along the axis direction of the winding roller 20 in turn. The winding roller 20 then drives the core shaft to rotate along the axis direction of the core shaft to wind the plastic film into a roll. When the winding is completed, the staff turns off the second motor 15 and deflates the winding roller 20 through the controller 23, the second motor 15 stops running, and the winding roller 20 releases the core shaft. When it is necessary to unload the winding roller 20, the staff starts the first motor 4 through the controller 23. The first motor 4 runs and the rotating shaft rotates to drive the threaded rod 5 to rotate along the axial direction of the threaded rod 5. The threaded rod 5 drives the threaded block 7 to move along the axial direction of the threaded rod 5 close to the first fixed block 8. At the same time, the threaded block 7 slides along the first slide groove 6. The threaded block 7 drives the lower end of the first movable rod 12 to move along the axial direction of the threaded rod 5 close to the first fixed block 8. At the same time, it drives the pin shaft 14 to move upward, the upper end of the first movable rod 12 to move vertically upward, and the upper end of the second movable rod 13 to move upward and move horizontally relative to the base 3 close to the second fixed block 11. The upper end of the first movable rod 12 drives the second fixed block 11 to move vertically upward, and the upper end of the second movable rod 13 drives the slider 10 to move upward and slide along the second slide groove 9. The slider 10 and the second fixed block 11 drive the base 3 to move vertically upward until it contacts the rolled plastic film. At the same time, the staff turns off the first motor 4 through the controller 23. The staff loosens the limit nut 18 and pulls the pull rod 17. The pull rod 17 moves horizontally in the direction away from the winding roller 20 and drives the slot 19 to release the buckle 21. The buckle 21 drives the winding roller 20 to disengage from the slot 19 and acts on the base 3. Finally, the staff starts the first motor 4 to reverse through the controller 23. Similarly, the base 3, the slider 10, the first movable rod 12, the second movable rod 13, the pin 14, and the threaded block 7 return to the starting position, thereby completing the unloading of the plastic film winding roller 20.

[0040] The above embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work all fall within the scope of protection of the utility model.

Claims

1. The unwinding device of the plastic film winding roller is characterized by: The invention comprises a box body (1), a frame (2), a base (3), a first motor (4), a threaded rod (5), a first slide groove (6), a threaded block (7), a first fixed block (8), a second slide groove (9), a slider (10), a second fixed block (11), a first movable rod (12), a second movable rod (13), a pin shaft (14), a second motor (15), a transmission rod (16), a pull rod (17), a limit nut (18), two slots (19), a winding roller (20), two buckles (21), and a controller (23). The box body (1) is a box-shaped structure with an opening at the top, and the interior of the box body (1) is connected to the outside; the frame (2) is a door-shaped structure, and the frame (2) is arranged above the box body (1). The bottom of the frame (2) is fixedly connected to the top of the box (1), and the interior of the frame (2) is connected to the outside; the base (3) is a square metal plate, which is arranged horizontally on the top of the box (1) and fits with the opening at the top of the box (1); the first motor (4) is arranged inside the box (1), the rotating shaft of the first motor (4) is arranged horizontally in the long side direction of the box (1), and the bottom of the first motor (4) is fixedly connected to the inner surface of the box (1); the threaded rod (5) is arranged horizontally on the side of the first motor (4), and the axial direction coincides with the axial direction of the rotating shaft of the first motor (4), and the side end of the threaded rod (5) is fixedly connected to the rotating shaft of the first motor (4); A slide groove (6) is transversely arranged at the bottom of the inner cavity of the box body (1) and is arranged below the threaded rod (5), and the notch of the first slide groove (6) is connected to the inner cavity of the box body (1); the threaded block (7) is arranged through the upper part of the first slide groove (6), the bottom of the threaded block (7) is slidably connected to the inner wall of the first slide groove (6), the inner wall of the threaded block (7) is connected to the surface of the threaded rod (5) through a thread, and the threaded block (7) is used in conjunction with the first slide groove (6) and the threaded rod (5); the first fixed block (8) is arranged inside the box body (1), the connection direction of the first fixed block (8) and the threaded block (7) coincides with the axial direction of the threaded rod (5), and the first fixed block (8) is connected to the inner wall of the threaded rod (5) through a thread. The bottom of the block (8) is fixedly connected to the inner surface of the box body (1); the second slide groove (9) is transversely arranged at the lower part of the base (3) and arranged above the threaded rod (5), and the notch of the second slide groove (9) is connected to the outside; the slider (10) is arranged through the lower part of the second slide groove (9), the top of the slider (10) is slidably connected to the inner wall of the second slide groove (9), and the slider (10) is used in conjunction with the second slide groove (9); the second fixed block (11) is arranged below the base (3), the direction of the connection between the second fixed block (11) and the slider (10) is parallel to the axial direction of the threaded rod (5), and the top of the second fixed block (11) is fixedly connected to the bottom of the base (3);The first movable rod (12) is arranged below the base (3), the lower end of the first movable rod (12) is hinged to the threaded block (7), and the upper end is hinged to the second fixed block (11); the second movable rod (13) is arranged below the base (3), the lower end of the second movable rod (13) is hinged to the first fixed block (8), and the upper end is hinged to the slider (10); the pin shaft (14) is arranged between the first movable rod (12) and the second movable rod (13), and the first movable rod (12) and the second movable rod (13) are movably connected via the pin shaft (14); the second motor (15) is arranged laterally on the side of the frame (2), and the second motor (15) is arranged on the side of the frame (2). 5) the rotating shaft transversely penetrates the side of the frame (2), and the axial direction is parallel to the axial direction of the threaded rod (5), and the side of the second motor (15) is fixedly connected to the side of the frame (2); the transmission rod (16) is transversely arranged inside the frame (2) and arranged on the side of the second motor (15), the axial direction of the transmission rod (16) coincides with the axial direction of the rotating shaft of the second motor (15), and the side end of the transmission rod (16) is fixedly connected to the rotating shaft of the second motor (15); the pull rod (17) transversely penetrates and is arranged on the side of the frame (2) away from the second motor (15), and the axial direction of the pull rod (17) coincides with the axial direction of the rotating shaft of the second motor (15). The axis direction of the rotating shaft coincides, and the outer wall of the pull rod (17) is slidably connected to the inner wall of the frame (2) passing through; the limiting nut (18) is arranged inside the frame (2) and outside the pull rod (17), and the inner wall of the limiting nut (18) is threadedly connected to the outer wall of the pull rod (17); the two clamping grooves (19) are respectively arranged on the side end of the transmission rod (16) away from the second motor (15) and the side end of the pull rod (17) close to the second motor (15), and the side parts of the two clamping grooves (19) are respectively fixedly connected to the side end of the transmission rod (16) and the side end of the pull rod (17), and the connection direction of the two clamping grooves (19) is consistent with the second motor (15). The winding roller (20) is of an inflatable shaft type, and the winding roller (20) is transversely arranged on the side of the transmission rod (16) away from the second motor (15), and the axis direction coincides with the axis direction of the rotating shaft of the second motor (15); the two buckles (21) are respectively arranged on the side end of the winding roller (20) away from the second motor (15) and the side end close to the second motor (15), the side parts of the two buckles (21) are respectively fixedly connected to the two ends of the winding roller (20), and are respectively tightly attached to the side parts of the two card slots (19), and the connection direction of the two buckles (21) coincides with the rotation shaft direction of the second motor (15);The controller (23) is arranged on the side of the frame (2) away from the second motor (15), the side of the controller (23) is fixedly connected to the side of the frame (2), and the controller (23) is electrically connected to the first motor (4), the second motor (15), and the winding roller (20) respectively.

2. The unwinding device for the plastic film winding roller according to claim 1, characterized in that : It includes a fixed roller (22), which is arranged horizontally inside the frame (2) and above the winding roller (20), and the two ends of the fixed roller (22) are respectively fixedly connected to the top of the inner cavity of the frame (2).

3. The unwinding device for the plastic film winding roller according to claim 1 is characterized in that The frame (2) is fixed to the box (1) and the controller (23) by welding.

4. The unwinding device for the plastic film winding roller according to claim 1, characterized in that The top surface of the base (3) is wider than the bottom surface.

5. The unwinding device for the plastic film winding roller according to claim 1, characterized in that The upper part of the base (3) is an arc-shaped notch.

6. The unwinding device for the plastic film winding roller according to claim 1, characterized in that : Lubricant is applied between the first slide groove (6) and the threaded block (7), and between the second slide groove (9) and the sliding block (10).

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