Unreeling device for printing protective film

Abstract

The invention relates to the technical field of unwinding, in particular to an unwinding device for protective film printing. Comprising a base, a box body is fixed to the base, a pulley is slidably clamped to the base on one side of the box body, a sliding plate is fixed to the pulley, a rack is slidably arranged in the box body in the vertical direction, a protruding rod is fixed to the lower end of the rack, a combined groove is formed in the sliding plate, and the protruding rod can drive the rack to reciprocate up and down; a shaft sleeve is fixed to the rotating shaft, a sliding ring is elastically and slidably arranged on the shaft sleeve on the outer side of the box body, a rotating disc is concentrically and rotatably connected to the sliding ring, a plurality of sliding rods are slidably arranged on the rotating disc, supporting plates are fixed to the sliding rods, and the square rods are movably connected with the supporting plates through a plurality of inclined connecting rods. Through driving of the pulley, the protruding rod and the combined groove are in linkage to control the rack to ascend and descend, the film roll is automatically loaded to the bearing piece from the V-shaped groove of the tray, and the film roll and the tray are accurately separated.

Description

Technical Field

[0001] The invention relates to the technical field of unwinding, in particular to an unwinding device for protective film printing. Background Art

[0002] In the high-precision printing process of folding screen protective films, the unwinding mechanism is the core equipment for ensuring stable substrate transport. Traditional unwinding mechanisms typically use a fixed carrier frame with manual clamping to secure the film roll (i.e., the roller formed by the protective film substrate). This design has significant drawbacks: The roll changing efficiency is low. Each time the film roll is replaced, the empty roll needs to be manually removed and the new roll needs to be repositioned. The printing line needs to be shut down frequently, especially in large-scale continuous production, which causes production capacity loss. Precision film materials are easily damaged. Manual operation can easily cause scratches or uneven force on the film roll surface. The folding screen protective film has extremely high requirements for surface flatness and tension control. Minor damage will cause optical defects. Empty rolls are difficult to collect. The peeled rolls require additional equipment or manual transfer, which can easily accumulate next to the production line, interfering with equipment operation and increasing cleaning costs. The self-adaptive ability is insufficient. The clamps need to be replaced for film rolls of different diameters. The fit between the support plate and the inner wall of the roller cannot be automatically adjusted, which can easily cause unwinding slippage or eccentric torque fluctuations, affecting printing registration accuracy.

[0003] Existing technologies attempt to optimize the film roll positioning process through slide rail structures, but they fail to address systemic issues such as automatic tilting of the carrier mechanism for unloading, synchronous recovery of empty rolls, and dynamic locking of the carrier. Therefore, there is an urgent need to develop a full-process unwinding device that integrates automatic loading, dynamic locking, adaptive expansion and fixation, and automatic recovery of empty rolls to meet the high cleanliness and stability requirements of precision printing. Summary of the Invention

[0004] The main purpose of the present invention is to provide a protective film printing unwinding device which is convenient for unwinding the protective film after installing a roller wound with the protective film.

[0005] In order to achieve the above object, the technical solution provided by the present invention is: A reeling device for printing protective film comprises a base, a box body is fixed on the base, a pulley is slidably engaged with the base on one side of the box body, a tray is fixed on the upper end of the pulley, a slide is fixed on the pulley, the slide is slidably connected to the box body, a rack is provided for sliding in the vertical direction of the box body, a convex rod is fixed at the lower end of the rack, a combined groove is provided on the slide board, the convex rod is slidably arranged in the combined groove, and during the reciprocating motion of the slide board, the convex rod can drive the rack to reciprocate up and down, a rotating shaft is rotatably connected in the box body, the rotating shaft is transmission-connected to the rack, a shaft sleeve is fixed on the rotating shaft, the shaft sleeve passes through the vertical groove of the side wall of the box body, and the outer surface of the box body is provided with a plurality of movable brackets. A slip ring is elastically slidably provided on the side sleeve, and a turntable is coaxially connected to the slip ring, and a plurality of slide rods are slidably provided on the turntable, and a support plate is fixed on the slide rods. A motor is concentrically fixed to one end of the sleeve in the box, and an inner shaft is concentrically fixed to the output shaft of the motor. The inner shaft is rotatably connected to the sleeve, and a square rod is concentrically fixed to one end of the inner shaft. The square rod and the support plate are movably connected by a plurality of inclined connecting rods. A limit assembly is movably provided in the sleeve, and the limit assembly can limit the slip ring. An arc rod is fixed in the box. After one end of the sleeve in the box is rotated downward, the arc rod can drive the limit assembly to move and release the slip ring.

[0006] Specifically, a guide rail is fixed to the upper end of the base, and the lower end of the pulley is slidably engaged in the guide rail. A driving unit is installed on the base, and the driving unit is connected to the pulley. The driving unit can drive the pulley to move along the length direction of the guide rail.

[0007] Specifically, a V-shaped groove is provided on the upper end of the tray, a collecting bucket is fixed on the upper end of the pulley, the height of the collecting bucket is greater than the height of the tray, and the tray is located between the collecting bucket and the box body.

[0008] Specifically, a mounting seat is fixed in the box body, and the rotating shaft is rotatably arranged in the mounting seat. A gear is concentrically fixed on the rotating shaft, and the gear is engaged with the rack. The axial direction of the rotating shaft is perpendicular to the axial direction of the sleeve.

[0009] Specifically, a sliding groove is provided on the shaft sleeve outside the box body, and the length direction of the sliding groove is parallel to the axial direction of the shaft sleeve. A slider is fixed in the slip ring, and the slider is slidably engaged in the sliding groove. The slip ring and the shaft sleeve are connected by a first spring. A ring groove is concentrically provided on the side of the slip ring away from the box body, and a swivel is rotatably engaged in the ring groove. The swivel is concentrically fixed to the turntable.

[0010] Specifically, the sliding direction of the slide rod on the turntable is parallel to the radial direction of the turntable, and multiple slide rods are evenly distributed according to the circumference of the axis of the turntable. The slide rods are slidably arranged in the limit grooves of the turntable. Retaining rings are fixed on the slide rods on both sides of the turntable. The retaining rings are in sliding 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 roller part protrudes to the outside of the support plate, and the axis of the roller is perpendicular to the axis of the square rod.

[0011] Specifically, the combined groove includes an upper flat groove and a lower flat groove provided on the slide plate, the upper flat groove and the lower flat groove are parallel, the left end of the upper flat groove and the left end of the lower flat groove are connected through a third inclined groove, the lower end of the third inclined groove is inclined to the right direction, the right end of the upper flat groove and the right end of the lower flat groove are connected through the first inclined groove, the lower end of the first inclined groove is inclined to the right direction, a second inclined groove is provided on the slide plate, the second inclined groove is located on the right side of the first inclined groove, the lower end of the second inclined groove is inclined to the left direction, the lower end of the second inclined groove is connected to the lower end of the first inclined groove, and the third inclined groove is connected to the lower end of the first inclined groove. A middle flat groove is provided on the slide on the left side of the groove, and the middle flat groove is connected to the third oblique groove. A wedge block is slidingly arranged in the middle flat groove. The wedge block and the slide are connected by a third spring. The upper end of the wedge block is flush with the lower groove wall of the upper flat groove. When the protruding rod slides upward in the third oblique groove, it contacts the inclined surface of the wedge block. Under the guiding action of the inclined surface of the wedge block, the wedge block squeezes the third spring and moves into the middle 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.

[0012] Specifically, the limit assembly includes an inner groove opened inside the shaft sleeve, the inner groove is in an inverted L shape, the inner groove is located below the inner shaft, a sliding plate is slidably arranged in the inner groove, the sliding plate includes a straight section and a vertical section, the straight section of the sliding plate is slidably arranged in the straight groove of the inner groove, the vertical section of the sliding plate is slidably arranged in the vertical groove of the inner groove, the vertical section of the sliding plate passes through the vertical groove of the inner groove, the straight section of the sliding plate extends to the inner hole of the slip ring, a second block is fixed at the lower end of the inner hole of the slip ring, and the flat section of the sliding plate is slidably arranged in the vertical groove of the inner groove. A plurality of first clamping blocks are fixed to the lower end of the straight section, and the plurality of first clamping blocks are evenly distributed along the length direction of the straight section of the sliding plate. The second clamping block is limited by the first clamping block, and the sliding plate can slide up and down in the inner groove. After the sliding plate slides upward in the inner groove, the first clamping block loses its limiting effect on the second clamping block. A blind hole is opened in the shaft sleeve, and the blind hole is connected to the straight groove of the inner groove. A second spring is arranged in the blind hole, and the lower end of the second spring is fixedly connected to the shaft sleeve, and the upper end of the second spring is fixedly connected to the straight section of the sliding plate.

[0013] Specifically, the arc rod is located below the sleeve, and one end of the arc rod is fixedly connected to the box body. After one end of the sleeve in the box body rotates downward, the other end of the arc rod can block the vertical section of the sliding plate. In the process of one end of the sleeve in the box body continuing to rotate downward, the sliding plate moves upward in the inner groove. After the first block and the second block are separated, the slip ring can slide along the axial direction of the sleeve.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The pulley drives the cam, which in conjunction with the combined grooves, to control the rack's lifting and lowering. This allows the film roll to be automatically loaded from the pallet's V-groove onto the carrier, and precisely separated from the pallet. During the tilting of the carrier, the curved cam triggers the limiter assembly to release the slip ring, causing the support plate to expand radially, and the rollers to adaptively adhere to the roller's inner wall. Manual clamping is completely unnecessary. After unwinding, the cam lifts the rack a second time via the second chute, triggering the release of the slip ring limiter. The first spring pushes the turntable upward, and the connecting rod contracts, driving the support plate radially back. The roller automatically falls into the collection hopper for synchronous recovery.

[0015] 2. The support plate and roller are rotatably connected and protrude from the support plate surface, rolling against the inner wall of the roller, ensuring that the film roll can descend along the axis of the carrier and press against the turntable and slip ring. The slip ring elastically slides with the first spring, allowing the roller to apply a flexible preload to the inner wall of the roller, preventing deformation caused by excessive pressure. The wedge and third spring form a one-way lock to secure the rack position when the carrier is tilted.

[0016] 3. The support plate is connected to the turntable through a sliding rod. Driven by a linkage mechanism, it expands and contracts radially synchronously, accommodating rollers of varying diameters. Rollers evenly squeeze the roller's inner wall at multiple points, eliminating eccentric vibration and ensuring uniform unwinding tension. The rack's elevation and bearing rotation are rigidly driven by gears and shafts, ensuring precise angle control. The axial sliding of the slip ring and the radial movement of the support plate are controlled separately by an elastic mechanism to avoid linkage interference.

[0017] 4. The collection hopper is higher than the tray, allowing roll recovery and new roll loading to proceed simultaneously without stopping the production line. The drive unit controls the reciprocating motion of the pulley, completing the entire process of roll unloading, resetting, and positioning the new roll in a single cycle. As the protruding rod descends through the first chute, it drives the rack to reset, and the carrier automatically returns to its initial angle, providing a reference position for the next loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the present invention.

[0019] Figure 2 It is a front view of the present invention.

[0020] Figure 3 A cross-sectional view of the box.

[0021] Figure 4 Schematic diagram of the meshing of rack and gear.

[0022] Figure 5 This is a cross-sectional view of the sleeve.

[0023] Figure 6 for Figure 5 Magnified view of area A in center.

[0024] Figure 7 A schematic diagram of a combined slot.

[0025] Figure 8 Schematic diagram of the connection between the slider and the turntable.

[0026] Figure 9 Schematic diagram of the shaft sleeve.

[0027] Figure 10 A schematic diagram of a turntable.

[0028] Figure 11 Schematic diagram of the connection between the support plate and the sliding rod.

[0029] Figure 12 Schematic diagram of the initial state of the present invention.

[0030] Figure 13 This is a diagram showing the state of the rear rod with one end of the sleeve in the box rotating downward.

[0031] Figure 14 This is a state diagram of the protruding rod being located behind the rod in the second inclined slot.

[0032] 1. The names of the parts in the accompanying drawings are: 1. Base; 2. Guide rail; 3. Pulley; 4. Tray; 5. Collecting bucket; 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 clamping block; 28. Second clamping block; 29. ​​First inclined groove; 291. Second inclined groove; 292. Third inclined groove; 30. Wedge block; 31. Third spring; 32. Slide groove; 33. Mounting seat; 34. Vertical groove; 35. Middle flat groove. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figures 1-14 As shown, a reeling device for protective film printing includes a base 1, a box 6 is fixed on the base 1, and a pulley 3 is slidably engaged with the base 1 on one side of the box 6.

[0035] A guide rail 2 is fixed to the upper end of the base 1, and the lower end of the pulley 3 is slidably engaged in the guide rail 2. A driving unit is installed on the base 1, and the driving unit is connected to the pulley 3. The driving unit can drive the pulley 3 to move along the length direction of the guide rail 2.

[0036] A tray 4 is fixed on the upper end of the pulley 3, and a V-shaped groove is provided on the upper end of the tray 4.

[0037] A collecting bucket 5 is fixed to the upper end of the pulley 3 . The height of the collecting bucket 5 is greater than the height of the tray 4 . The tray 4 is located between the collecting bucket 5 and the box body 6 .

[0038] A slide plate 7 is fixed on the pulley 3 , and there are two slide plates 7 , which are symmetrically arranged front to back, and the slide plates 7 are slidably connected to the box body 6 .

[0039] A rack 15 is slidably provided in the vertical direction in the box body 6. There are two racks 15, and the two racks 15 are symmetrically arranged front to back.

[0040] A protruding rod 14 is fixed to the lower end of the rack 15 , and a combination groove is provided on the slide 7 , in which the protruding rod 14 is slidably arranged. During the reciprocating motion of the slide 7 , the protruding rod 14 can drive the rack 15 to reciprocate up and down.

[0041] The combined groove includes an upper flat groove 131 and a lower flat groove 13 opened on the slide 7. The upper flat groove 131 is parallel to the lower flat groove 13. The left end of the upper flat groove 131 is connected to the left end of the lower flat groove 13 through the third inclined groove 292. The lower end of the third inclined groove 292 is inclined to the right.

[0042] The right end of the upper flat groove 131 and the right end of the lower flat groove 13 are connected through the first inclined groove 29, and the lower end of the first inclined groove 29 is inclined toward the right direction.

[0043] A second inclined groove 291 is formed on the slide plate 7 and is located on the right side of the first inclined groove 29 . The lower end of the second inclined groove 291 is inclined to the left and is communicated with the lower end of the first inclined groove 29 .

[0044] An intermediate flat groove 35 is provided on the slide 7 on the left side of the third inclined groove 292. The intermediate flat groove 35 is connected to the third inclined groove 292. A wedge block 30 is slidingly provided in the intermediate flat groove 35. The wedge block 30 is connected to the slide 7 through a third spring 31. The upper end of the wedge block 30 is flush with the lower groove wall of the upper flat groove 131.

[0045] When the protruding rod 14 slides upward in the third inclined groove 292, it contacts the inclined surface of the wedge block 30. Under the guiding action 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.

[0046] A rotating shaft is rotatably connected in the housing 6, and the rotating shaft is transmission-connected to the rack 15. Specifically, a mounting seat 33 is fixed in the housing 6, and the rotating shaft is rotatably arranged in the mounting seat 33. A gear 18 is concentrically fixed on the rotating shaft, and the gear 18 is engaged with the rack 15. The axial direction of the rotating shaft is perpendicular to the axial direction of the sleeve 17.

[0047] A shaft sleeve 17 is fixed on the rotating shaft, and the shaft sleeve 17 passes through the vertical groove 34 of the side wall of the box body 6. A slip ring 11 is elastically slidably provided on the shaft sleeve 17 outside the box body 6, and a turntable 10 is coaxially connected to the slip ring 11.

[0048] Specifically, a slide groove 32 is provided on the sleeve 17 outside the box body 6. The length direction of the slide groove 32 is parallel to the axial direction of the sleeve 17. A slider is fixed in the slip ring 11. The slider slides and is engaged in the slide groove 32. The slip ring 11 and the sleeve 17 are connected by the first spring 12.

[0049] A ring groove is concentrically formed on one side of the slip ring 11 facing away from the box body 6 , and a rotating ring is rotatably engaged in the ring groove. The rotating ring is concentrically and fixedly connected to the turntable 10 .

[0050] A plurality of slide bars 22 are slidably mounted on the turntable 10, each of which is secured with a support plate 8. Specifically, the slide bars 22 slide in a direction parallel to the radial direction of the turntable 10. The slide bars 22 are evenly distributed around the axis of the turntable 10 and slide in the retaining grooves 23 of the turntable 10. A retaining ring 221 is secured to the slide bars 22 on both sides of the turntable 10, and the retaining ring 221 is in sliding contact with the turntable 10.

[0051] A motor 16 is concentrically fixed to one end of the sleeve 17 in the box body 6, and an inner shaft 26 is concentrically fixed to the output shaft of the motor 16. The inner shaft 26 is rotatably connected to the sleeve 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.

[0052] 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 .

[0053] A plurality of rollers 9 are rotatably provided on one side of the support plate 8 away from the square rod 20 . Parts of the rollers 9 protrude to the outside of the support plate 8 , and the axes of the rollers 9 are perpendicular to the axis of the square rod 20 .

[0054] A limit assembly is movably provided in the shaft sleeve 17, which can limit the slip ring 11. An arc rod 19 is fixed in the box body 6. After one end of the shaft sleeve 17 in the box body 6 rotates downward, the arc rod 19 can drive the limit assembly to move and release the slip ring 11.

[0055] The limiting assembly includes an inner groove opened inside the sleeve 17, the inner groove is in an inverted L-shape, the inner groove is located below the inner shaft 26, and a sliding plate 24 is slidably arranged 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 arranged in the straight groove of the inner groove, and the vertical section of the sliding plate 24 is slidably arranged 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.

[0056] The straight section of the sliding plate 24 extends into the inner hole of the slip ring 11. A second block 28 is fixed to the lower end of the inner hole of the slip ring 11. A plurality of first blocks 27 are fixed to the lower end of the straight section of the sliding plate 24. The plurality of first blocks 27 are evenly distributed along the length direction of the straight section of the sliding plate 24. The second block 28 is limited by the first block 27.

[0057] The sliding plate 24 can slide up and down in the inner groove. After the sliding plate 24 slides upward in the inner groove, the first clamping block 27 loses its limiting effect on the second clamping block 28 .

[0058] A blind hole is provided in the shaft sleeve 17 , which 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 shaft sleeve 17 , and the upper end of the second spring 25 is fixedly connected to the straight section of the sliding plate 24 .

[0059] The arc rod 19 is located below the sleeve 17, and one end of the arc rod 19 is fixedly connected to the box body 6. After one end of the sleeve 17 in the box body 6 rotates downward, the other end of the arc rod 19 can block the vertical section of the sliding plate 24. In the process of one end of the sleeve 17 in the box body 6 continuing to rotate downward, the sliding plate 24 moves upward in the inner groove. After the first block 27 and the second block 28 are separated, the slip ring 11 can slide along the axial direction of the sleeve 17.

[0060] Before processing the protective film, the protective film substrate is wound around the outside of the roller to form a film roll.

[0061] During operation, the film roll is placed in the V-shaped groove of the tray 4, and then the drive unit is started, which drives the pulley 3 to approach the box 6. As the pulley 3 approaches the box 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.

[0062] As the trolley 3 continues to approach the box 6, the protruding rod 14 moves upward in the third inclined slot 292 under the guidance of the third inclined slot 292, and the protruding rod 14 drives 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 slot 35, and the third spring 31 is compressed.

[0063] 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 is reset and blocks the protruding rod 14 .

[0064] The rack 15 moves upwards and drives the gear 18 to rotate. When the gear 18 rotates, the bearing components composed of the sleeve 17, the inner shaft 26, the square rod 20, the multiple support plates 8, the multiple connecting rods 21, the multiple sliding rods 22, the turntable 10 and the slip ring 11 make the axis of the rotating shaft in the film winding mounting seat 33 rotate clockwise, and then the film roll is separated from the tray 4. At this time, the state of the device is as follows: Figure 13 Show.

[0065] During the clockwise rotation of the bearing component, after the arc rod 19 blocks the vertical section of the sliding plate 24, as the sleeve 17 continues to rotate clockwise, under the blocking effect of the arc rod 19 on the vertical section of the sliding plate 24, the sliding plate 24 is close to the center of the sleeve 17 in the inner groove, the second spring 25 is stretched, the first block 27 is separated from the second block 28 and loses its limiting effect on the slip ring 11.

[0066] At this point, the bearing is in an inclined state, and the film roll extrusion turntable 10 and slip ring 11 descend along the axial direction of the shaft sleeve 17. The first spring 12 is compressed, and under the action of the connecting rod 21, as the turntable 10 and slip ring 11 descend along the axial direction of the shaft sleeve 17, the connecting rod 21 tends to be perpendicular to the square rod 20, and the sliding 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 is pressed against the inner wall of the roller, the turntable 10 and slip ring 11 stop descending along the axial direction of the shaft sleeve 17.

[0067] Then the driving unit drives the pulley 3 away from the box body 6, the protruding rod 14 moves in the upper flat groove 131, the rack 15 cannot move downward, and the sleeve 17 and the square rod 20 remain in an inclined state.

[0068] When the protruding rod 14 enters the upper end of the first inclined slot 29, as the pulley 3 moves away from the box body 6, the protruding rod 14 is guided by the first inclined slot 29, and the rack 15 is driven downward by the protruding rod 14. During the downward movement of the rack 15, the supporting member rotates and resets.

[0069] During the rotational reset of the bearing, when the curved rod 19 loses its blocking effect on the vertical section of the sliding plate 24, the sliding plate 24 returns to its original position under the elastic force of the second spring 25, and the first engaging block 27 blocks the second engaging block 28, thereby retaining the position of the slip ring 11. After the sleeve 17 rotates and returns to its original position, the roller 9 on the support plate 8 maintains its pressure on the inner wall of the roller.

[0070] Then the motor 16 is started, and the motor 16 drives the inner shaft 26, the square rod 20, the multiple connecting rods 21, the multiple supporting plates 8, the multiple rollers 9, the turntable 10, the multiple sliding rods 22 and the film roll to rotate, thereby unwinding the protective film substrate.

[0071] After the protective film substrate is unwound, there is only one roller outside the carrier. At this time, the protruding rod 14 is located in the lower end of the first chute 29.

[0072] The driving unit is started and drives the pulley 3 and the slide plate 7 away from the box body 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 upward.

[0073] As the rack 15 moves upward, the bearing member drives the roller to rotate clockwise. When the sliding plate 24 moves upward in the inner groove and loses its limit on the slip ring 11, under the elastic force of the first spring 12, the slip ring 11 and the turntable 10 move upward along the axial direction of the shaft sleeve 17. Under the action of the connecting rod 21, the support plate 8 approaches the square rod 20. Under the pushing action of the slip ring 11 and the turntable 10 on the roller, when the roller is separated from the bearing member, the roller can fall into the collection bucket 5, thereby realizing the collection of the roller. The state of the roller after falling into the collection bucket 5 is as follows: Figure 14 shown.

[0074] 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 in the scope of protection of the present invention.

Claims

1. A protective film printing unwinding device, comprising a base (1), a box (6) fixed on the base (1), characterized in that: A pulley (3) is slidably connected to the base (1) on one side of the box body (6), a tray (4) is fixed on the upper end of the pulley (3), a slide plate (7) is fixed on the pulley (3), and the slide plate (7) is slidably connected to the box body (6). A rack (15) is slidably provided in the vertical direction of the box body (6), a convex rod (14) is fixed on the lower end of the rack (15), a combination groove is provided on the slide plate (7), and the convex rod (14) is slidably provided in the combination groove. During the reciprocating motion of the slide plate (7), the convex rod (14) can drive the rack (15) to reciprocate up and down. A rotating shaft is rotatably connected in the box body (6), and the rotating shaft is transmission-connected to the rack (15). A shaft sleeve (17) is fixed on the shaft sleeve (17), which passes through the vertical groove (34) of the side wall of the box body (6). A slip ring (11) is elastically slidably provided on the shaft sleeve (17) outside the box body (6). A turntable (10) is coaxially connected to the ring (11), a plurality of slide bars (22) are slidably provided on the turntable (10), and a support plate (8) is fixed on each of the slide bars (22). A motor (16) is coaxially fixed to one end of a shaft sleeve (17) in the box (6), and an inner shaft (26) is coaxially fixed to the output shaft of the motor (16). The inner shaft (26) is rotatably connected to the shaft sleeve (17). A square rod (20) is coaxially fixed to one end of the inner shaft (26), and the square rod (20) is movably connected to the support plate (8) through a plurality of inclined connecting rods (21). A limit assembly is movably provided in the shaft sleeve (17), and the limit assembly can limit the slip ring (11). An arc rod (19) is fixed in the box (6), and when one end of the shaft sleeve (17) in the box (6) rotates downward, the arc rod (19) can drive the limit assembly to move and release the slip ring (11).

2. The unwinding device for protective film printing according to claim 1, characterized in that: A guide rail (2) is fixed to the upper end of the base (1), and the lower end of the pulley (3) is slidably engaged in the guide rail (2). A driving unit is installed on the base (1), and the driving unit is connected to the pulley (3). The driving unit can drive the pulley (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: A V-shaped groove is provided on the upper end of the tray (4), a collecting bucket (5) is fixed on the upper end of the pulley (3), the height of the collecting bucket (5) is greater than the height of the tray (4), and the tray (4) is located between the collecting bucket (5) and the box body (6).

4. The unwinding device for protective film printing according to claim 1, characterized in that: A mounting seat (33) is fixed in the box (6), and a rotating shaft is rotatably arranged in the mounting seat (33). A gear (18) is concentrically fixed on the rotating shaft, and the gear (18) is engaged with the rack (15). The axial direction of the rotating shaft is perpendicular to the axial direction of the shaft sleeve (17).

5. The unwinding device for protective film printing according to claim 1, characterized in that: A sliding groove (32) is provided on the shaft sleeve (17) outside the housing (6), and the length direction of the sliding groove (32) is parallel to the axial direction of the shaft sleeve (17). A slider is fixed in the slip ring (11), and the slider is slidably engaged in the sliding groove (32). The slip ring (11) and the shaft sleeve (17) are connected through a first spring (12). A ring groove is concentrically provided on the side of the slip ring (11) facing away from the housing (6), and a rotating ring is rotatably engaged in the ring groove. The rotating ring is concentrically fixedly connected to the turntable (10).

6. The unwinding device for protective film printing according to claim 1, characterized in that: The sliding direction of the slide bar (22) on the turntable (10) is parallel to the radial direction of the turntable (10), and the plurality of slide bars (22) are evenly distributed according to the circumference of the axis of the turntable (10). The slide bars (22) are slidably arranged in the limit grooves (23) of the turntable (10). The slide bars (22) on both sides of the turntable (10) are fixed with retaining rings (221), and the retaining rings (221) are 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). A plurality of rollers (9) are rotatably arranged on the side of the support plate (8) away from the square rod (20), and the rollers (9) partially protrude to the outside of the support plate (8). The axis of the rollers (9) is perpendicular to the axis of the square rod (20).

7. The unwinding device for protective film printing according to claim 1, characterized in that: The combined groove comprises an upper flat groove (131) and a lower flat groove (13) provided on the slide plate (7), the upper flat groove (131) and the lower flat groove (13) being parallel, the left end of the upper flat groove (131) and the left end of the lower flat groove (13) being connected through a third inclined groove (292), the lower end of the third inclined groove (292) being inclined toward the right side, the right end of the upper flat groove (131) and the right end of the lower flat groove (13) being connected through a first inclined groove (29), the lower end of the first inclined groove (29) being inclined toward the right side, a second inclined groove (291) being provided on the slide plate (7), the second inclined groove (291) being located on the right side of the first inclined groove (29), the lower end of the second inclined groove (291) being inclined toward the left side, the lower end of the second inclined groove (291) being connected to the lower end of the first inclined groove (29), the left side of the third inclined groove (292) being inclined toward the left side, and the right end of the second inclined groove (291) being connected to the lower end of the first inclined groove (29). The slide plate (7) is provided with an intermediate flat groove (35), which is communicated with the third inclined groove (292). A wedge block (30) is slidably provided in the intermediate flat groove (35). The wedge block (30) is connected to the slide plate (7) by a third spring (31). The upper end of the wedge block (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 block (30) during the process of sliding upward in the third inclined groove (292). Under the guiding action of the inclined surface of the wedge block (30), the wedge block (30) squeezes the third spring (31) and moves into the intermediate 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).

8. The unwinding device for protective film printing according to claim 1, characterized in that: The limiting assembly includes an inner groove provided inside the shaft sleeve (17), the inner groove is in an inverted L-shape, the inner groove is located below the inner shaft (26), a sliding plate (24) is slidably arranged 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 arranged in the straight groove of the inner groove, the vertical section of the sliding plate (24) is slidably arranged 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, the straight section of the sliding plate (24) extends to the inner hole of the slip ring (11), the lower end of the inner hole of the slip ring (11) is fixed with a second block (28), and the lower end of the straight section of the sliding plate (24) is fixed with multiple A first clamping block (27) is provided, and the plurality of first clamping blocks (27) are evenly distributed along the length direction of the straight section of the sliding plate (24). The second clamping block (28) is limited by the first clamping block (27). The sliding plate (24) can slide up and down in the inner groove. After the sliding plate (24) slides upward in the inner groove, the first clamping block (27) loses its limiting effect on the second clamping block (28). A blind hole is provided in the shaft sleeve (17), and the blind hole is communicated with 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 shaft sleeve (17), and the upper end of the second spring (25) is fixedly connected to the straight section of the sliding plate (24).

9. The unwinding device for protective film printing according to claim 8, characterized in that: The arc rod (19) is located below the shaft sleeve (17), one end of the arc rod (19) is fixedly connected to the box body (6), and one end of the arc rod (19) is an arc end. After one end of the shaft sleeve (17) in the box body (6) rotates downward, the other end of the arc rod (19) can block the vertical section of the sliding plate (24). During the process of one end of the shaft sleeve (17) in the box body (6) continuing to rotate downward, the sliding plate (24) moves upward in the inner groove. After the first clamping block (27) and the second clamping block (28) are separated, the slip ring (11) can slide along the axial direction of the shaft sleeve (17).

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