An unwinding device for printing protective film

Abstract

This invention relates to the field of unwinding technology, specifically to an unwinding device for protective film printing. It includes a base, a housing fixed to the base, a trolley slidably engaged with the base on one side of the housing, a slide plate fixed to the trolley, a rack slidably mounted vertically inside the housing, a protruding rod fixed to the lower end of the rack, a combination groove on the slide plate, and the protruding rod driving the rack to reciprocate up and down. A rotating shaft is rotatably connected inside the housing, and the rotating shaft is drively connected to the rack. A bushing is fixed to the rotating shaft, and a slip ring is elastically slidably mounted on the bushing on the outside of the housing. A turntable is concentrically rotatably connected to the slip ring, and multiple sliding rods are slidably mounted on the turntable. Each sliding rod has a support plate fixed to it, and the square rods and support plates are movably connected by multiple inclined connecting rods. This invention achieves automatic loading of the film roll from the V-shaped groove of the tray to the carrier by driving the trolley and controlling the rack's lifting and lowering through the linkage of the protruding rod and the combination groove, and accurately separates the film roll from the tray.

Description

Technical Field

[0001] This invention relates to the field of unwinding technology, specifically to an unwinding device for protective film printing. Background Technology

[0002] In the high-precision printing process of foldable screen protectors, the unwinding device is the core equipment for ensuring stable delivery of the substrate. Traditional unwinding mechanisms typically use a fixed support frame combined with manual clamping to secure the film roll (i.e., the roller formed by winding the protective film substrate). This design has significant drawbacks:

[0003] Low roll changing efficiency: Each roll change requires manual disassembly of the empty roller and repositioning of the new roll, resulting in frequent printing line shutdowns and capacity losses, especially in large-scale continuous production. Precision film materials are easily damaged; manual operation can easily lead to scratches or uneven stress on the film roll surface. Foldable screen protective films have extremely high requirements for surface flatness and tension control, and even minor damage can cause optical defects. Empty roll collection is difficult; stripped rollers require additional equipment or manual transfer, easily accumulating next to the production line and interfering with equipment operation, and increasing cleaning costs. Insufficient adaptability: different diameter film rolls require different clamps, and the inability to automatically adjust the fit between the support plate and the inner wall of the roller can easily cause unwinding slippage or eccentric torque fluctuations, affecting printing registration accuracy.

[0004] Existing technologies attempt to optimize the film roll positioning process through slide rail structures, but they have failed to solve systemic problems such as automatic tilting unwinding of the carrier mechanism, synchronous recovery of empty rollers, and dynamic locking of the carrier components. Therefore, there is an urgent need to develop a complete unwinding device that integrates automatic loading, dynamic locking, adaptive expansion fixing, and automatic empty roller recovery to meet the requirements of high cleanliness and high stability in precision printing. Summary of the Invention

[0005] The main objective of this invention is to provide an unwinding device for protective film printing that facilitates the unwinding of the protective film after installing a roller wrapped with the protective film.

[0006] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0007] A protective film printing unwinding device includes a base, a housing fixed on the base, a trolley slidably engaged with a base on one side of the housing, a tray fixed to the upper end of the trolley, a slide plate fixed on the trolley, and a slide plate slidably connected to the housing. A rack is slidably mounted vertically inside the housing, with a protruding rod fixed to the lower end of the rack. A combination groove is formed on the slide plate, and the protruding rod is slidably positioned in the combination groove. During the reciprocating motion of the slide plate, the protruding rod drives the rack to reciprocate up and down. A rotating shaft is rotatably connected inside the housing, and the rotating shaft is driven by the rack. A bushing is fixed on the rotating shaft, and the bushing passes through a vertical groove in the side wall of the housing. A slip ring is elastically slidably mounted on the side bushing. A turntable is concentrically rotatably connected to the slip ring. Multiple slide rods are slidably mounted on the turntable, and each slide rod is fixed with a support plate. A motor is concentrically fixed to one end of the bushing inside the housing. An inner shaft is concentrically fixed to the output shaft of the motor. The inner shaft is rotatably connected to the bushing. A square rod is concentrically fixed to one end of the inner shaft. The square rod is movably connected to the support plate through multiple inclined connecting rods. A limit component is movably mounted inside the bushing. The limit component can limit the slip ring. An arc-shaped rod is fixed inside the housing. After one end of the bushing inside the housing is rotated downward, the arc-shaped rod can drive the limit component to move and release the slip ring.

[0008] Specifically, a guide rail is fixed to the upper end of the base, and the lower end of the trolley is slidably engaged in the guide rail. A drive unit is installed on the base and is connected to the trolley. The drive unit can drive the trolley to move along the length of the guide rail.

[0009] Specifically, the upper end of the tray has a V-shaped groove, and the upper end of the trolley has a collection hopper fixed thereon. The height of the collection hopper is greater than the height of the tray, and the tray is located between the collection hopper and the box.

[0010] Specifically, a mounting base is fixed inside the housing, and a rotating shaft is rotatably mounted inside the mounting base. A gear is concentrically fixed on the rotating shaft, and the gear meshes with a rack. The axial direction of the rotating shaft is perpendicular to the axial direction of the bushing.

[0011] Specifically, a sliding groove is provided on the bushing on the outer side of the housing. The length direction of the sliding groove is parallel to the axial direction of the bushing. A slider is fixed inside the sliding ring. The slider is slidably engaged in the sliding groove. The sliding ring and the bushing are connected by a first spring. A ring groove is concentrically provided on the side of the sliding ring away from the housing. A rotating ring is rotatably engaged in the ring groove. The rotating ring is concentrically fixedly connected to the turntable.

[0012] Specifically, the sliding direction of the slide rod on the turntable is parallel to the radial direction of the turntable. Multiple slide rods are evenly distributed around the circumference of the turntable's axis. The slide rods are slidably positioned in the limiting groove of the turntable. Retaining rings are fixed on the slide rods on both sides of the turntable, and the retaining rings are in slidable contact with the turntable. One end of the connecting rod is rotatably connected to the support plate, and the other end of the connecting rod is rotatably connected to the square rod. Multiple rollers are rotatably arranged on the side of the support plate away from the square rod. The rollers protrude to the outside of the support plate, and the axis of the rollers is perpendicular to the axis of the square rod.

[0013] Specifically, the combined groove includes an upper flat groove and a lower flat groove formed on the slide plate. The upper and lower flat grooves are parallel. The left ends of the upper and lower flat grooves are connected by a third inclined groove, the lower end of which slopes to the right. The right ends of the upper and lower flat grooves are connected by a first inclined groove, the lower end of which slopes to the right. A second inclined groove is formed on the slide plate, located to the right of the first inclined groove. The lower end of the second inclined groove slopes to the left and is connected to the lower end of the first inclined groove. The third inclined groove... A central flat groove is provided on the slide plate on the left side of the groove. The central flat groove is connected to the third inclined groove. A wedge block is slidably installed in the central flat groove. The wedge block is connected to the slide plate by a third spring. The upper end of the wedge block is flush with the lower groove wall of the upper flat groove. As the protruding rod slides upward in the third inclined groove, it contacts the inclined surface of the wedge block. Under the guidance of the inclined surface of the wedge block, the wedge block squeezes the third spring and moves into the central flat groove. After the protruding rod enters the upper flat groove, the wedge block is reset under the elastic force of the third spring, and the protruding rod is blocked by the upper end of the wedge block.

[0014] Specifically, the limiting component includes an inner groove formed inside the bushing, the inner groove being inverted L-shaped and located below the inner shaft. A sliding plate is slidably disposed within the inner groove, the sliding plate comprising a straight section and a vertical section. The straight section of the sliding plate is slidably disposed within the straight groove of the inner groove, and the vertical section of the sliding plate is slidably disposed within the vertical groove of the inner groove. The vertical section of the sliding plate penetrates the vertical groove of the inner groove, and the straight section of the sliding plate extends into the inner hole of the slip ring. A second locking block is fixed at the lower end of the inner hole of the slip ring. Multiple first locking blocks are fixed at the lower end of the straight section. The multiple first locking blocks are evenly distributed along the length of the straight section of the sliding plate. The second locking blocks are limited by the first locking blocks. The sliding plate can slide up and down in the inner groove. After the sliding plate slides upward in the inner groove, the first locking blocks lose their limiting effect on the second locking blocks. A blind hole is opened in the bushing. The blind hole is connected to the straight groove of the inner groove. A second spring is installed in the blind hole. The lower end of the second spring is fixedly connected to the bushing, and the upper end of the second spring is fixedly connected to the straight section of the sliding plate.

[0015] Specifically, the arc-shaped rod is located below the bushing, and one end of the arc-shaped rod is fixedly connected to the housing. After one end of the bushing inside the housing rotates downward, the other end of the arc-shaped rod can block the vertical section of the sliding plate. As one end of the bushing inside the housing continues to rotate downward, the sliding plate moves upward in the inner groove. After the first and second locking blocks separate, the slip ring can slide along the axial direction of the bushing.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The film roll is automatically loaded from the V-groove of the pallet onto the carrier by a pulley drive and a linkage between the convex rod and the combined groove, achieving precise separation between the film roll and the pallet. During the tilting of the carrier, the arc-shaped rod triggers the limit component to release the slip ring, which in turn causes the support plate to expand radially. The rollers adaptively adhere to the inner wall of the roller, requiring no manual intervention during the entire clamping process. After unwinding, the convex rod lifts the rack a second time via the second inclined groove, triggering the slip ring limit to release; the first spring pushes the turntable upward, the connecting rod retracts, causing the support plate to retract radially, and the roller automatically falls into the collection hopper, achieving synchronous roller recovery.

[0018] 2. The support plate and roller are rotatably connected and protrude from the surface of the support plate, making rolling contact with the inner wall of the roller to ensure that the film roll can descend along the axis of the carrier and squeeze the turntable and slip ring; the slip ring elastically slides in conjunction with the first spring, so that the roller applies a flexible preload to the inner wall of the roller to prevent overpressure from causing the roller to deform. The wedge block and the third spring form a one-way lock to ensure the position of the rack when the carrier is tilted.

[0019] 3. The support plate is slidably connected to the turntable via a sliding rod, and expands and contracts radially synchronously under the drive of the linkage mechanism, accommodating rollers of different diameters; the rollers are evenly distributed at multiple points to compress the inner wall of the roller, eliminating eccentric vibration and ensuring uniform unwinding tension. The rack lifting and the rotation of the load-bearing component are rigidly transmitted through gears and a rotating shaft to ensure angle control accuracy; the axial sliding of the slip ring and the radial movement of the support plate are separated and controlled by an elastic mechanism to avoid linkage interference.

[0020] 4. The height of the collection hopper exceeds that of the pallet, allowing roller recycling and new roll loading to proceed simultaneously without stopping the production line. The drive unit controls the reciprocating motion of the trolley, completing the entire process of unloading, resetting, and positioning the new roll in a single cycle. When the convex rod descends through the first inclined groove, it drives the rack to reset, and the carrier automatically returns to its initial angle, providing a reference position for the next loading. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention.

[0022] Figure 2 This is a front view of the present invention.

[0023] Figure 3 This is a sectional view of the box.

[0024] Figure 4 This is a schematic diagram of the meshing of a rack and pinion.

[0025] Figure 5 This is a sectional view of the bushing.

[0026] Figure 6 for Figure 5 A magnified view of region A in the middle.

[0027] Figure 7 This is a schematic diagram of the combined groove.

[0028] Figure 8 This is a schematic diagram showing the connection between the slide bar and the turntable.

[0029] Figure 9 This is a schematic diagram of the bushing.

[0030] Figure 10 This is a schematic diagram of the turntable.

[0031] Figure 11 This is a schematic diagram showing the connection between the support plate and the sliding rod.

[0032] Figure 12 This is a schematic diagram of the initial state of the present invention.

[0033] Figure 13 This is a diagram showing the state of the rod after one end of the bushing inside the housing rotates downwards.

[0034] Figure 14 This is a diagram showing the state of the protruding rod located behind the rod inside the second inclined groove.

[0035] The components in the attached diagram are named as follows: 1. Base; 2. Guide rail; 3. Trolley; 4. Tray; 5. Collection hopper; 6. Box body; 7. Slide plate; 8. Support plate; 9. Roller; 10. Turntable; 11. Slip ring; 12. First spring; 13. Lower flat groove; 131. Upper flat groove; 14. Protruding rod; 15. Rack; 16. Motor; 17. Bushing; 18. Gear; 19. Arc rod; 20. Square rod; 21. Connecting rod; 22. Slide rod; 221. Retaining ring; 23. Limiting groove; 24. Sliding plate; 25. Second spring; 26. Inner shaft; 27. First locking block; 28. Second locking block; 29. ​​First inclined groove; 291. Second inclined groove; 292. Third inclined groove; 30. Wedge block; 31. Third spring; 32. Slide groove; 33. Mounting base; 34. Vertical groove; 35. Middle flat groove. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] like Figures 1-14 As shown, an unwinding device for protective film printing includes a base 1, a box 6 fixed on the base 1, and a trolley 3 slidably engaged on the base 1 on one side of the box 6.

[0038] The upper end of the base 1 is fixed with a guide rail 2, and the lower end of the trolley 3 is slidably engaged in the guide rail 2. A drive unit is installed on the base 1, and the drive unit is connected to the trolley 3. The drive unit can drive the trolley 3 to move along the length of the guide rail 2.

[0039] A tray 4 is fixed to the upper end of the trolley 3, and a V-shaped groove is opened on the upper end of the tray 4.

[0040] A collection hopper 5 is fixed to the upper end of the trolley 3. The height of the collection hopper 5 is greater than the height of the tray 4. The tray 4 is located between the collection hopper 5 and the box 6.

[0041] Two slide plates 7 are fixed on the trolley 3. The two slide plates 7 are symmetrically arranged front and back, and the slide plates 7 are slidably connected to the box body 6.

[0042] Two racks 15 are slidably arranged in the vertical direction inside the housing 6, and the two racks 15 are arranged symmetrically front and back.

[0043] A protruding rod 14 is fixed at the lower end of the rack 15. A combination groove is provided on the slide plate 7. The protruding rod 14 is slidably disposed in the combination groove. During the reciprocating motion of the slide plate 7, the protruding rod 14 can drive the rack 15 to move up and down reciprocally.

[0044] The combined groove includes an upper flat groove 131 and a lower flat groove 13 formed on the slide plate 7. The upper flat groove 131 and the lower flat groove 13 are parallel. The left end of the upper flat groove 131 and the left end of the lower flat groove 13 are connected by a third inclined groove 292. The lower end of the third inclined groove 292 is inclined to the right.

[0045] The right end of the upper flat groove 131 and the right end of the lower flat groove 13 are connected by the first inclined groove 29, and the lower end of the first inclined groove 29 is inclined to the right.

[0046] The slide plate 7 has a second inclined groove 291, which is located to the right of the first inclined groove 29. The lower end of the second inclined groove 291 is inclined to the left and is connected to the lower end of the first inclined groove 29.

[0047] A middle flat groove 35 is provided on the slide plate 7 on the left side of the third inclined groove 292. The middle flat groove 35 is connected to the third inclined groove 292. A wedge block 30 is slidably arranged in the middle flat groove 35. The wedge block 30 is connected to the slide plate 7 through the third spring 31. The upper end of the wedge block 30 is flush with the lower groove wall of the upper flat groove 131.

[0048] As the protruding rod 14 slides upward in the third inclined groove 292, it comes into contact with the inclined surface of the wedge block 30. Under the guidance of the inclined surface of the wedge block 30, the wedge block 30 squeezes the third spring 31 and moves into the middle flat groove 35. After the protruding rod 14 enters the upper flat groove 131, the wedge block 30 is reset under the elastic force of the third spring 31, and the protruding rod 14 is blocked by the upper end of the wedge block 30.

[0049] A rotating shaft is rotatably connected inside the housing 6, and the rotating shaft is connected to the rack 15 for transmission. Specifically, a mounting base 33 is fixed inside the housing 6, and the rotating shaft is rotatably mounted inside the mounting base 33. A gear 18 is concentrically fixed on the rotating shaft, and the gear 18 meshes with the rack 15. The axial direction of the rotating shaft is perpendicular to the axial direction of the bushing 17.

[0050] A bushing 17 is fixed on the rotating shaft. The bushing 17 passes through the vertical groove 34 on the side wall of the housing 6. A slip ring 11 is elastically slidably arranged on the bushing 17 on the outside of the housing 6. A turntable 10 is concentrically rotatably connected to the slip ring 11.

[0051] Specifically, a groove 32 is provided on the bushing 17 on the outer side of the housing 6. The length direction of the groove 32 is parallel to the axial direction of the bushing 17. A slider is fixed inside the slip ring 11. The slider is slidably engaged in the groove 32. The slip ring 11 and the bushing 17 are connected by the first spring 12.

[0052] The slip ring 11 has a concentric groove on the side opposite to the housing 6, and a rotating ring is rotatably engaged in the groove. The rotating ring is concentrically fixedly connected to the turntable 10.

[0053] Multiple slide rods 22 are slidably mounted on the turntable 10, and each slide rod 22 is fixed with a support plate 8. Specifically, the sliding direction of the slide rods 22 on the turntable 10 is parallel to the radial direction of the turntable 10. The multiple slide rods 22 are evenly distributed around the axial circumference of the turntable 10. The slide rods 22 are slidably mounted in the limiting grooves 23 of the turntable 10. Each slide rod 22 on both sides of the turntable 10 is fixed with a retaining ring 221, which slides in contact with the turntable 10.

[0054] A motor 16 is concentrically fixed to one end of a bushing 17 inside the housing 6. An inner shaft 26 is concentrically fixed to the output shaft of the motor 16. The inner shaft 26 is rotatably connected to the bushing 17. A square rod 20 is concentrically fixed to one end of the inner shaft 26. The square rod 20 is movably connected to the support plate 8 through multiple inclined connecting rods 21.

[0055] One end of the connecting rod 21 is rotatably connected to the support plate 8, and the other end of the connecting rod 21 is rotatably connected to the square rod 20.

[0056] Multiple rollers 9 are rotatably mounted on the side of the support plate 8 away from the square rod 20. Part of the rollers 9 protrudes to the outside of the support plate 8, and the axis of the rollers 9 is perpendicular to the axis of the square rod 20.

[0057] A limiting component is movably installed inside the bushing 17, which can limit the slip ring 11. An arc-shaped rod 19 is fixed inside the housing 6. After one end of the bushing 17 inside the housing 6 is rotated downward, the arc-shaped rod 19 can drive the limiting component to move and release the slip ring 11.

[0058] The limiting component includes an inner groove formed inside the bushing 17. The inner groove is inverted L-shaped and located below the inner shaft 26. A sliding plate 24 is slidably disposed in the inner groove. The sliding plate 24 includes a straight section and a vertical section. The straight section of the sliding plate 24 is slidably disposed in the straight groove of the inner groove, and the vertical section of the sliding plate 24 is slidably disposed in the vertical groove of the inner groove. The vertical section of the sliding plate 24 passes through the vertical groove of the inner groove.

[0059] The straight section of the sliding plate 24 extends into the inner hole of the slip ring 11. A second locking block 28 is fixed at the lower end of the inner hole of the slip ring 11. A plurality of first locking blocks 27 are fixed at the lower end of the straight section of the sliding plate 24. The plurality of first locking blocks 27 are evenly distributed along the length direction of the straight section of the sliding plate 24. The second locking block 28 is limited by the first locking blocks 27.

[0060] The sliding plate 24 can slide up and down in the inner groove. After the sliding plate 24 slides up in the inner groove, the first locking block 27 loses its limiting function on the second locking block 28.

[0061] A blind hole is provided inside the bushing 17, which is connected to the straight groove of the inner groove. A second spring 25 is provided inside the blind hole. The lower end of the second spring 25 is fixedly connected to the bushing 17, and the upper end of the second spring 25 is fixedly connected to the straight section of the sliding plate 24.

[0062] The arc-shaped rod 19 is located below the bushing 17. One end of the arc-shaped rod 19 is fixedly connected to the housing 6. After one end of the bushing 17 inside the housing 6 rotates downward, the other end of the arc-shaped rod 19 can block the vertical section of the sliding plate 24. As one end of the bushing 17 inside the housing 6 continues to rotate downward, the sliding plate 24 moves upward in the inner groove. After the first locking block 27 and the second locking block 28 separate, the slip ring 11 can slide along the axial direction of the bushing 17.

[0063] Before processing the protective film, the protective film substrate is wound around the outside of the roller to form a film roll.

[0064] During operation, the film roll is placed in the V-shaped groove of the tray 4, and then the drive unit is started. The drive unit drives the trolley 3 to approach the housing 6. As the trolley 3 approaches the housing 6, the protruding rod 14 first moves in the lower flat groove 13. After the roller is sleeved on the outside of the multiple support plates 8, the protruding rod 14 enters the lower end of the third inclined groove 292 on the left.

[0065] As the trolley 3 continues to approach the housing 6, guided by the third inclined groove 292, the protruding rod 14 moves upward within the third inclined groove 292, driving the rack 15 upward. After the protruding rod 14 contacts the inclined surface of the wedge block 30, the wedge block 30 moves into the middle flat groove 35, and the third spring 31 is compressed.

[0066] When the protruding rod 14 moves into the upper flat groove 131, the protruding rod 14 is located above the wedge block 30. Under the elastic force of the third spring 31, the wedge block 30 resets and blocks the protruding rod 14.

[0067] As rack 15 moves upward, it drives gear 18 to rotate. When gear 18 rotates, the support structure, composed of bushing 17, inner shaft 26, square rod 20, multiple support plates 8, multiple connecting rods 21, multiple sliding rods 22, turntable 10, and slip ring 11, causes the membrane roll to rotate clockwise around the axis of the inner rotating shaft of mounting base 33. Then, the membrane roll separates from tray 4. At this point, the device is in the following state: Figure 13 Show.

[0068] During the clockwise rotation of the bearing component, after the arc rod 19 blocks the vertical section of the sliding plate 24, as the bushing 17 continues to rotate clockwise, under the blocking action of the arc rod 19 on the vertical section of the sliding plate 24, the sliding plate 24 approaches the center of the bushing 17 in the inner groove, the second spring 25 is stretched, the first locking block 27 separates from the second locking block 28 and loses its limiting effect on the slip ring 11.

[0069] At this time, the carrier is in an inclined state. The film roll extrusion turntable 10 and slip ring 11 move downward along the axial direction of the bushing 17. The first spring 12 is compressed. Under the action of the connecting rod 21, as the turntable 10 and slip ring 11 move downward along the axial direction of the bushing 17, the connecting rod 21 tends to be perpendicular to the square rod 20, the slide rod 22 slides in the limiting groove 23, and the support plate 8 moves away from the square rod 20. When the roller 9 on the support plate 8 presses tightly against the inner wall of the roller, the turntable 10 and slip ring 11 stop moving downward along the axial direction of the bushing 17.

[0070] Then the drive unit drives the trolley 3 away from the housing 6, the convex rod 14 moves in the upper flat groove 131, the rack 15 cannot go down, and the bushing 17 and the square rod 20 remain in an inclined state.

[0071] When the protruding rod 14 enters the upper end of the first inclined groove 29, as the trolley 3 moves away from the housing 6, the protruding rod 14 is guided by the first inclined groove 29 to move downward, and the rack 15 moves downward. During the downward movement of the rack 15, the bearing component rotates and resets.

[0072] During the rotation and reset process of the bearing component, when the arc-shaped rod 19 loses its obstruction of the vertical section of the sliding plate 24, the sliding plate 24 resets under the elastic force of the second spring 25, and the first locking block 27 blocks the second locking block 28, thereby limiting the slip ring 11. After the bushing 17 rotates and resets, the roller 9 on the support plate 8 maintains pressure on the inner wall of the roller.

[0073] Then, the motor 16 is started, which drives the inner shaft 26, square rod 20, multiple connecting rods 21, multiple support plates 8, multiple rollers 9, turntable 10, multiple slide rods 22 and film roll to rotate, thereby unwinding the protective film substrate.

[0074] After the protective film substrate is unwound, there is only one roller on the outside of the carrier. At this time, the protruding rod 14 is located inside the lower end of the first inclined groove 29.

[0075] The drive unit is activated, which drives the trolley 3 and the slide plate 7 away from the housing 6. After the protruding rod 14 enters the second inclined groove 291, under the guidance of the second inclined groove 291, the protruding rod 14 drives the rack 15 to move upward.

[0076] During the upward movement of rack 15, the carrier drives the roller to rotate clockwise. When sliding plate 24 moves upward in the inner groove and loses its restraint on slip ring 11, under the elastic force of the first spring 12, slip ring 11 and turntable 10 move upward along the axial direction of bushing 17. Under the action of connecting rod 21, support plate 8 approaches square rod 20. Driven by slip ring 11 and turntable 10, when the roller separates from the carrier, it falls into collection hopper 5, thus achieving roller collection. The state of the roller after falling into collection hopper 5 is as follows... Figure 14 As shown.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A protective film printing unwinding device, comprising a base (1) and a housing (6) fixed on the base (1), characterized in that, A trolley (3) is slidably attached to a base (1) on one side of the box (6). A tray (4) is fixed to the upper end of the trolley (3). A slide plate (7) is fixed to the trolley (3). The slide plate (7) is slidably connected to the box (6). A rack (15) is slidably installed vertically inside the box (6). A protruding rod (14) is fixed to the lower end of the rack (15). A combination groove is opened on the slide plate (7). The protruding rod (14) is slidably installed in the combination groove. During the reciprocating motion of the slide plate (7), the protruding rod (14) can drive the rack (15) to move up and down. The housing (6) is rotatably connected to a rotating shaft, which is connected to a rack (15) for transmission. A bushing (17) is fixed on the rotating shaft, and the bushing (17) passes through the vertical groove (34) on the side wall of the housing (6). A slip ring (11) is elastically slidably arranged on the bushing (17) on the outside of the housing (6). A turntable (10) is concentrically rotatably connected to the slip ring (11). Multiple slide rods (22) are slidably arranged on the turntable (10). Each slide rod (22) is fixed with a support plate (8). An electric motor is concentrically fixed at one end of the bushing (17) inside the housing (6). The machine (16) has an inner shaft (26) concentrically fixed on its output shaft. The inner shaft (26) is rotatably connected to the bushing (17). A square rod (20) is concentrically fixed at one end of the inner shaft (26). The square rod (20) is movably connected to the support plate (8) through multiple inclined connecting rods (21). A limit component is movably installed inside the bushing (17). The limit component can limit the slip ring (11). An arc rod (19) is fixed inside the housing (6). After one end of the bushing (17) inside the housing (6) is rotated downwards, the arc rod (19) can... The limit component can be driven to move and release the slip ring (11); a groove (32) is provided on the bushing (17) on the outside of the housing (6). The length direction of the groove (32) is parallel to the axial direction of the bushing (17). A slider is fixed inside the slip ring (11). The slider is slidably engaged in the groove (32). The slip ring (11) and the bushing (17) are connected by a first spring (12). A ring groove is concentrically provided on the side of the slip ring (11) away from the housing (6). A rotating ring is rotatably engaged in the ring groove. The rotating ring is concentrically fixedly connected to the turntable (10).

2. The unwinding device for protective film printing according to claim 1, characterized in that, The upper end of the base (1) is fixed with a guide rail (2), and the lower end of the trolley (3) is slidably engaged in the guide rail (2). A drive unit is installed on the base (1), and the drive unit is connected to the trolley (3). The drive unit can drive the trolley (3) to move along the length direction of the guide rail (2).

3. The unwinding device for protective film printing according to claim 1, characterized in that, The upper end of the tray (4) is provided with a V-shaped groove, and the upper end of the trolley (3) is fixed with a collection hopper (5). The height of the collection hopper (5) is greater than the height of the tray (4), and the tray (4) is located between the collection hopper (5) and the box (6).

4. The unwinding device for protective film printing according to claim 1, characterized in that, The housing (6) is fixed with a mounting base (33), and the rotating shaft is rotatably set in the mounting base (33). A gear (18) is concentrically fixed on the rotating shaft. The gear (18) meshes with the rack (15). The axial direction of the rotating shaft is perpendicular to the axial direction of the bushing (17).

5. The unwinding device for protective film printing according to claim 1, characterized in that, The sliding direction of the slide rod (22) on the turntable (10) is parallel to the radial direction of the turntable (10). Multiple slide rods (22) are evenly distributed around the circumference of the turntable (10). The slide rods (22) are slidably disposed in the limiting groove (23) of the turntable (10). A retaining ring (221) is fixed on each slide rod (22) on both sides of the turntable (10). The retaining ring (221) is in sliding contact with the turntable (10). One end of the connecting rod (21) is rotatably connected to the support plate (8), and the other end of the connecting rod (21) is rotatably connected to the square rod (20). Multiple rollers (9) are rotatably disposed on the side of the support plate (8) away from the square rod (20). Part of the roller (9) protrudes to the outside of the support plate (8), and the axis of the roller (9) is perpendicular to the axis of the square rod (20).

6. The unwinding device for protective film printing according to claim 1, characterized in that, The combined groove includes an upper flat groove (131) and a lower flat groove (13) formed on the slide plate (7). The upper flat groove (131) and the lower flat groove (13) are parallel. The left end of the upper flat groove (131) and the left end of the lower flat groove (13) are connected by a third inclined groove (292). The lower end of the third inclined groove (292) is inclined to the right. The right end of the upper flat groove (131) and the right end of the lower flat groove (13) are connected by a first inclined groove (29). The lower end of the first inclined groove (29) is inclined to the right. A second inclined groove (291) is formed on the slide plate (7). The second inclined groove (291) is located to the right of the first inclined groove (29). The lower end of the second inclined groove (291) is inclined to the left. The lower end of the second inclined groove (291) is connected to the lower end of the first inclined groove (29). The left side of the third inclined groove (292) is... A middle flat groove (35) is provided on the slide plate (7). The middle flat groove (35) is connected to the third inclined groove (292). A wedge (30) is slidably arranged in the middle flat groove (35). The wedge (30) is connected to the slide plate (7) through the third spring (31). The upper end of the wedge (30) is flush with the lower groove wall of the upper flat groove (131). The protruding rod (14) contacts the inclined surface of the wedge (30) during the upward sliding process in the third inclined groove (292). Under the guiding action of the inclined surface of the wedge (30), the wedge (30) squeezes the third spring (31) and moves into the middle flat groove (35). After the protruding rod (14) enters the upper flat groove (131), the wedge (30) is reset under the elastic force of the third spring (31), and the protruding rod (14) is blocked by the upper end of the wedge (30).

7. The unwinding device for protective film printing according to claim 1, characterized in that, The limiting component includes an inner groove formed inside the bushing (17), the inner groove being inverted L-shaped and located below the inner shaft (26). A sliding plate (24) is slidably disposed in the inner groove. The sliding plate (24) includes a straight section and a vertical section. The straight section of the sliding plate (24) is slidably disposed in the straight groove of the inner groove, and the vertical section of the sliding plate (24) is slidably disposed in the vertical groove of the inner groove. The vertical section of the sliding plate (24) penetrates the vertical groove of the inner groove, and the straight section of the sliding plate (24) extends into the inner hole of the slip ring (11). A second locking block (28) is fixed at the lower end of the inner hole of the slip ring (11), and multiple locking blocks (28) are fixed at the lower end of the straight section of the sliding plate (24). A first locking block (27) is evenly distributed along the length of the straight section of the sliding plate (24). The second locking block (28) is limited by the first locking block (27). The sliding plate (24) can slide up and down in the inner groove. After the sliding plate (24) slides up in the inner groove, the first locking block (27) loses its limiting effect on the second locking block (28). A blind hole is provided in the bushing (17). The blind hole is connected to the straight groove of the inner groove. A second spring (25) is provided in the blind hole. The lower end of the second spring (25) is fixedly connected to the bushing (17), and the upper end of the second spring (25) is fixedly connected to the straight section of the sliding plate (24).

8. The unwinding device for protective film printing according to claim 7, characterized in that, The arc-shaped rod (19) is located below the bushing (17). One end of the arc-shaped rod (19) is fixedly connected to the housing (6). One end of the arc-shaped rod (19) is an arc-shaped end. After one end of the bushing (17) inside the housing (6) rotates downward, the other end of the arc-shaped rod (19) can block the vertical section of the sliding plate (24). During the process of the bushing (17) inside the housing (6) continuing to rotate downward, the sliding plate (24) moves upward in the inner groove. After the first locking block (27) and the second locking block (28) separate, the slip ring (11) can slide along the axial direction of the bushing (17).

Images