Paper-free tube winding device

Abstract

The invention relates to the technical field of winding materials, and particularly discloses a paper-tube-free winding device which is characterized in that a rack is provided with a supporting platform located below a rewinding shaft and a lifter used for driving the supporting platform to move up and down, the supporting platform is provided with a slidable bearing seat, and the bearing seat is provided with a gear piece and a material pushing plate; a V-shaped groove used for containing a thin film roll material on the rewinding shaft is formed between the blocking piece and the material pushing plate, and clamping pieces formed at the two ends of the V-shaped groove are fixedly arranged on the bearing base. An inclined roll material storage frame is arranged at the discharging position of the machine frame, the upper end of the roll material storage frame is flush with the height position of the blocking piece, and when the material pushing plate is twisted, the thin film roll material can be pushed to pass through the blocking piece so that the thin film roll material can roll into the roll material storage frame. According to the paper-tube-free winding device, through bearing of the bearing seat and shifting of the clamping piece, falling of the film roll material is avoided, and therefore collision and extrusion deformation of the film roll material are avoided, and uniformity and flatness of a film roll material finished product are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of winding materials, and in particular to a paperless tube winding device. Background Art

[0002] Stretch film, also known as stretch film, is a highly effective protective packaging material primarily used to wrap and protect a variety of products. Its excellent flexibility, ductility, impact resistance, and adhesion have led to its widespread application in industries such as hardware, electronics, chemicals, and food and beverages. Stretch film rewinding optimizes storage, transportation, and usage efficiency. The finished roll is wound onto a large-diameter unwinding reel and then rewound using specialized equipment, converting it into multiple, smaller, more compact rolls. This conversion not only facilitates storage and handling but also enhances operational convenience and streamlines packaging operations.

[0003] Chinese patent application CN217626622U discloses a novel stretch film rewinder, comprising a machine body, a slide, a cutter, and a shifting block. The machine body is equipped with two rotatable, interchangeable reels, which are used to hold the paper rolls for winding the stretch film. A drive assembly drives the slide in reciprocating motion along the axis of the reels. The cutter is fixed to the slide and cuts the stretch film. The shifting block is rotatably mounted on the slide and, as it reciprocates with the slide, it performs an evasive motion and then pushes the paper roll away from the reels. In use, after the paper roll on the reel closest to the auxiliary roller is rewound, that reel rotates downward, while the other reel rotates upward, swapping the positions of the two reels. The drive assembly then drives the slide to slide, driving the cutter to pass between the two reels, thereby cutting the stretch film section between the two reels and freeing the stretch film rewound onto the paper roll. During this process, the shifting block remains in an evasive position and does not affect the paper rolls. Then the slide starts to move back, and the shifting block starts to push the rewound paper roll away from the reel, realizing the function of automatic discharging.

[0004] In the prior art, a transfer platform is typically installed next to the reel. When the paper roll is pushed off the reel, it falls onto the transfer platform. To prevent friction between the film roll on the paper roll and the transfer platform, the transfer platform is usually placed below the reel. However, this can cause the paper roll to fall unevenly during unloading, with one end sinking while the other end tilting upward. This can cause both ends of the paper roll to not land on the transfer platform simultaneously. This can easily cause the film roll on the paper roll to deform due to collision and compression, affecting product quality. Summary of the Invention

[0005] The present invention provides a paper tube-free winding device, which aims to solve the problem in the related art that a paper tube may be subjected to collision, extrusion and deformation due to unbalanced falling during discharging.

[0006] The paper tube-free winding device of the present invention comprises a frame and a rewinding mechanism installed on the frame, the rewinding mechanism comprises a rewinding shaft for rewinding the film, and is characterized in that the frame is provided with a supporting platform located below the rewinding shaft, a lifter for driving the supporting platform to move up and down, a supporting seat slidable along the axial direction of the rewinding shaft is provided on the supporting platform, a stopper and a push plate are provided on the supporting seat, a V-shaped groove extending in the axial direction of the rewinding shaft is formed between the stopper and the push plate, and the V-shaped groove is used to accommodate the film roll on the rewinding shaft The supporting seat is fixed with clips formed at both ends of the V-shaped groove and adapted to the rewinding shaft, and the two clips are used to limit the film roll in the middle; the frame has a unloading position which is on the sliding path of the supporting seat and located beside the rewinding shaft, and the frame is provided with an inclined roll storage frame at the unloading position, and the upper end of the roll storage frame is flush with the height position of the stop member, and the push plate can be elastically twisted relative to the supporting seat. When twisting, the push plate can push the film roll through the stop member to make the film roll roll into the roll storage frame.

[0007] The effect is this: once the film is rolled and a coil is formed on the rewinding shaft, the lifter controls the support platform to move upward until the V-shaped groove snaps upward onto the film coil, effectively supporting and accommodating the film. Simultaneously, two clips engage on either side of the film coil, and then the support seat slides, allowing the clips to move the film coil and remove it from the rewinding shaft. Because the V-shaped groove has pre-supported the film coil, the film coil moves smoothly when removed, preventing vertical drop. This prevents deformation and quality degradation caused by falling film coils, ensuring a uniform and smooth finished film coil.

[0008] When the clamp pushes the film roll downward, it simultaneously enters the unloading position. The push plate then twists upward, pushing the film roll past the stopper. The film roll leaves the V-shaped groove and rolls into the roll storage frame. Because the top of the roll storage frame is aligned with the stopper, the film roll smoothly transitions from the stopper to the roll storage frame without falling. This protects the film roll, preventing problems such as squeezing and deformation, and ensuring its quality.

[0009] Preferably, the frame is further provided with a limiting member located below the push plate at the unloading position, and the limiting member is used to block the push plate when the supporting seat moves downward, so that the push plate is twisted.

[0010] The effect is that the setting of the limiter realizes the automatic twisting of the push plate, automates the unloading process and reduces manpower.

[0011] Preferably, the rewinding mechanism also includes a turning seat that is flipably mounted on the frame, and there are two rewinding shafts that are mounted in parallel on the turning seat. The two rewinding shafts can swap positions when the turning seat is flipped, and the two swapped positions form a rewinding position and a standby position respectively; a rewinding shaft adjacent to the rewinding position is rotatably mounted on the frame, and an initial film is wound on the rewinding shaft; a cutting mechanism is provided on the frame between the rewinding position and the standby position, and the cutting mechanism is used to cut the film section between the two rewinding shafts.

[0012] Preferably, the push plate is arranged at an angle, the free end of the push plate extends between the two rewinding shafts and can contact the film section between the two rewinding shafts, and the upper surface of the push plate is provided with suction holes for adsorbing the film and capable of connecting to an external suction device.

[0013] The effect is that as the V-shaped groove engages the film roll, the free end of the pusher plate contacts the film segment as it moves upward, creating a suitable squeeze between them. The cutting mechanism then severs the film segment, forming two film ends. The end closest to the standby position smoothly transitions to the free end of the pusher plate. Simultaneously, the suction device begins pumping air, with the suction holes sucking the film end closest to the standby position. The suction force locks the film end in place, preventing it from retracting and deforming. This suction force maintains the film's tension, keeping the film roll tightly wound and preventing it from loosening.

[0014] Afterwards, the rewinding shaft at the standby position gradually rotates, gradually winding the film end near the standby position. During the winding process, the suction force of the suction hole is not interrupted, so that the tight state of the film roll can be continuously maintained. The film end near the standby position is attracted by the suction force and gradually transferred to the rewinding shaft at the standby position along the upper plate surface of the push plate. This ensures the tightness of the film during winding, realizes the complete winding of the film end, and guarantees the quality of the film roll after forming.

[0015] Preferably, the push plate is an arched plate with the arch surface facing upward, and a flexible breathable layer is laid on the arch surface of the arched plate. After the cutting mechanism cuts the film section, the film end close to the standby position is adsorbed on the flexible breathable layer.

[0016] The effect is that after the film section is cut, the film end near the standby position is adsorbed on the surface of the flexible breathable layer of the push plate. The flexible breathable layer acts as an intermediate medium to avoid direct contact between the film end and the suction hole. Its soft and flat characteristics protect the film end and appropriately disperse the adsorption force, making the adsorption of the film end more uniform.

[0017] Preferably, the rewinding shaft is an inflatable shaft, which is used to shrink inward after the V-shaped groove supports the film roll on the rewinding shaft in the standby position, so as to separate the inflatable shaft from the inner layer of the film roll.

[0018] The V-shaped groove provides support and stabilizes the axis of the film roll, preventing the film roll from being pressed down on the air shaft due to gravity after the air shaft contracts, thereby reducing the extrusion and deformation of the film's inner layer. Furthermore, due to the film's inherent stickiness, if the film roll continues to press down on the air shaft, the contact portion of the film roll can easily adhere to the air shaft. During subsequent material removal by the clamp, the film roll could be scratched or torn due to the adhesion and friction. The circumferential spacing between the air shaft and the film roll mitigates these scratches and tears, ensuring reliable film removal.

[0019] Preferably, the cutting mechanism comprises an electric heating cutter and a telescopic device, the electric heating cutter can slide up and down relative to the frame, and the telescopic device is installed on the frame and is used to drive the electric heating cutter to slide.

[0020] Preferably, the electric heating cutter is provided with a plurality of blowing holes that can be connected to an external blowing device. The blowing holes are used to blow air toward the end of the film near the rewinding position after the film section is cut to separate it from the electric heating cutter.

[0021] The effect is that the blowing action of the blowing hole avoids the adhesion of the film end and the electric heating cutter.

[0022] Preferably, a linear drive device for controlling the sliding of the supporting seat is provided on the supporting platform.

[0023] Preferably, a main driving mechanism and an auxiliary driving mechanism are installed on the frame, the main driving mechanism is used to control the turning seat to turn over, and the auxiliary driving mechanism is used to control the rewinding shaft to rotate.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are: The present invention uses a supporting seat to support the film coil first and a clamp to remove the film coil later, so that the film coil moves smoothly when it is removed from the rewinding shaft, and there is no problem of falling in the vertical direction. This avoids the problems of extrusion deformation and quality degradation caused by the film coil falling and impacting, and ensures that the finished film coil is uniform and flat. The push plate then pushes the film coil over the stopper, and the film coil leaves the V-shaped groove and rolls into the coil storage frame. Since the upper end of the coil storage frame is flush with the height position of the stopper, the film coil does not fall when rolling from the stopper to the coil storage frame, but rather rolls smoothly. This protects the film coil, avoids the problems of extrusion deformation of the film coil, and ensures the quality of the film coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the appearance of the paperless tube winding device of the present invention when it moves up on the lifting platform.

[0026] Figure 2 It is a schematic diagram of the appearance of the paperless tube winding device of the present invention when the supporting seat enters the unloading position.

[0027] Figure 3 It is a three-dimensional schematic diagram of the portion from the supporting seat to the pusher plate of the present invention.

[0028] Figure 4 It is an exploded schematic diagram of the portion from the supporting seat to the pusher plate of the present invention.

[0029] Figure 5 It is a schematic structural diagram of the electric heating cutter of the present invention when it moves upward.

[0030] Reference numerals: 100. Film roll stock; 1. Frame; 11. Lifter; 12. Telescopic device; 13. Limiting piece; 14. Coil storage frame; 2. Unwind the reel; 3. Rewinding mechanism; 31. Turning seat; 311. Turning shaft; 32. Rewinding shaft; 321. Inflatable shaft; 33. Main motor; 34. Transmission sleeve; 35. Second belt mechanism; 36. Auxiliary motor; 41. Support platform; 42. Push plate; 421. Arched plate; 422. Torsion spring; 423. Air suction hole; 424. Flexible breathable layer; 43. Support seat; 431. Limiting block; 432. Clamp; 433. Stop member; 434. V-shaped groove; 44. Linear drive device; 5. Cutting mechanism; 51. Electric heating tool; 511. Blowing hole. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0032] The following combination Figures 1 to 5 The paper tube-less winding device of the present invention is described.

[0033] like Figure 1 and Figure 2 As shown, the paper tube-less winding device of the present invention includes a frame 1, a rewinding mechanism 3, and a cutting mechanism 5.

[0034] The rewinding mechanism 3 is mounted on the frame 1 and includes a turning seat 31 and a rewinding shaft 32. A turning shaft 311 is fixedly mounted in the center of the turning seat 31. The turning shaft 311 is rotatably mounted on the frame 1, and the turning seat 31 can achieve a 180° turning motion via the turning shaft 311. A main drive mechanism for controlling the turning of the turning seat 31 is mounted on the frame 1. The main drive mechanism includes a main motor 33 and a belt drive mechanism. The main motor 33 is mounted on the frame 1. The belt drive mechanism connects the main motor 33 and the turning shaft 311. When the main motor 33 is started, the belt drive mechanism drives the turning shaft 311 to rotate, and the turning shaft 311 drives the turning seat 31 to turn.

[0035] Two rewinding shafts 32 are mounted on the flip seat 31 for rotation in parallel. The two rewinding shafts 32 are symmetrical about the flip axis 311. A secondary drive mechanism for controlling the rotation of the rewinding shafts 32 is mounted on the frame 1. The secondary drive mechanism includes a secondary motor 36, a transmission sleeve 34, a first belt mechanism, and a second belt mechanism 35. The secondary motor 36 is mounted on the frame 1. The transmission sleeve 34 is sleeved on the flip axis 311 and is rotationally connected to the frame 1. The transmission sleeve 34 can rotate freely relative to the flip axis 311. The first belt mechanism connects the secondary motor 36 and the transmission sleeve 34. The number of second belt mechanisms 35 is equal to and corresponds to the number of rewinding shafts 32. The second belt mechanisms 35 connect corresponding rewinding shafts 32 and transmission sleeves 34. When the secondary motor 36 is started, it drives the transmission sleeve 34 to rotate via the first belt mechanism, and the transmission sleeve 34 drives the rewinding shafts 32 to rotate via the second belt mechanism 35.

[0036] The unwinding shaft 2, located behind a turning base 31, is rotatably mounted on the frame 1. The unwinding shaft 2 is wound with an initial film, which is, understandably, a stretch film. The two rewinding shafts 32 can swap positions as the turning base 31 rotates, forming a rewinding position and a standby position, respectively. The rewinding position is closer to the unwinding shaft 2, while the standby position is farther away.

[0037] In the initial state, the two rewinding shafts 32 are in the same horizontal plane, with one rewinding shaft 32 in the rewinding position and the other rewinding shaft 32 in the standby position. The rewinding shaft 32 in the rewinding position is connected to the film unwound by the unwinding shaft 2, and the auxiliary motor 36 is started to drive the rewinding shaft 32 to rotate, and the rewinding shaft 32 in the rewinding position begins to rewind the film, thereby achieving rewinding. When the film forms a film roll 100 and rewinding is completed, the auxiliary motor 36 is turned off, and the main motor 33 drives the turning seat 31 to turn, causing the rewinding shaft 32 in the rewinding position to turn downward and the rewinding shaft 32 in the standby position to turn upward. As the turning seat 31 turns 180°, the positions of the two rewinding shafts 32 are swapped, and the rewinding shaft 32 with the film roll 100 is in the standby position, and the rewinding shaft 32 that has not been rewound is in the rewinding position. At this time, a straight film section is formed between the film roll 100 and the film on the unwinding shaft 2 , and the film section passes through the rewinding shaft 32 at the rewinding position and is located below the rewinding shaft 32 .

[0038] Continue to refer Figures 1 to 3 The frame 1 is provided with a support platform 41 located below the rewinding shaft 32. Specifically, the support platform 41 is located directly below the standby position of the rewinding shaft 32. The support platform 41 can slide up and down relative to the frame 1. The frame 1 is equipped with a lifter 11 for driving the support platform 41 to slide up and down. A support seat 43 and a linear drive device 44 are provided on the support platform 41. The support seat 43 can slide along the axial direction of the rewinding shaft 32. The linear drive device 44 is used to control the sliding of the support seat 43. The support seat 43 is provided with a stopper 433 and a push plate 42 adjacent to each other in the front and rear. A V-shaped groove 434 extending in the axial direction of the rewinding shaft 32 is formed between the stopper 433 and the push plate 42. The V-shaped groove 434 is used to accommodate the film roll 100 on the rewinding shaft 32 in the standby position. Two clamping members 432 formed at both ends of the V-shaped groove 434 are fixed on the supporting seat 43. The two clamping members 432 are both adapted to the rewinding shaft 32. The two clamping members 432 are used to limit the film roll 100 in the middle.

[0039] When the rewinding shaft 32, which is wound with the film roll 100, is in the standby position, the elevator 11 controls the support platform 41 to move upward until the V-shaped groove 434 engages upwardly on the film roll 100. At this point, the V-shaped groove 434 supports and accommodates the film roll 100. Simultaneously, two clamps 432 engage on either side of the film roll 100, and the linear drive 44 drives the support seat 43 to slide. The clamps 432 can move the film roll 100 and remove it from the rewinding shaft 32. Because the V-shaped groove 434 has pre-supported the film roll 100, the film roll 100 moves smoothly when removed and does not fall vertically. This avoids problems such as compression deformation and quality degradation caused by the film roll 100 falling and ensures the uniformity and flatness of the finished film roll 100.

[0040] The frame 1 has a discharge position located next to the rewinding shaft 32, and the discharge position is on the sliding path of the support seat 43. The frame 1 is installed with an inclined coil storage frame 14 at the discharge position. The upper end of the coil storage frame 14 is flush with the height position of the stop member 433. The connecting end of the push plate 42 is hinged to the support seat 43, and a torsion spring 422 is further connected between the connecting end of the push plate 42 and the support seat 43. The torsion spring 422 maintains the push plate 42 in an upward tilted posture in its natural state. The frame 1 is also fixed with a limit member 13 located below the push plate 42 at the discharge position.

[0041] When the clamp 432 pushes the film roll 100 down, it simultaneously enters the unloading position. Then, the lifter 11 controls the support platform 41 to move downward. The support platform 41 drives the push plate 42 downward through the support seat 43. The limiter 13 is used to block the push plate 42, causing the push plate 42 to deflect upward. At this time, the push plate 42 pushes the film roll 100 over the stopper 433. The film roll 100 leaves the V-shaped groove 434 and rolls into the roll storage frame 14. Because the upper end of the roll storage frame 14 is aligned with the height of the stopper 433, the film roll 100 does not fall when rolling from the stopper 433 to the roll storage frame 14. Instead, it rolls smoothly. This protects the film roll 100, prevents the film roll 100 from being squeezed and deformed, and ensures the quality of the film roll 100.

[0042] Continue to refer Figure 1 、 Figure 2 and Figure 5 In order to realize the automatic separation of the film roll 100 at the standby position and the film on the unwinding shaft 2, the cutting mechanism 5 is arranged on the frame 1 and is located between the rewinding position and the standby position. The cutting mechanism 5 is used to cut the film section between the two rewinding shafts 32.

[0043] The cutting mechanism 5 includes an electric heating cutter 51 and a telescopic device 12. The electric heating cutter 51 can slide up and down relative to the frame 1, and the telescopic device 12 is installed on the frame 1 and is used to drive the electric heating cutter 51 to slide.

[0044] When the telescopic device 12 controls the electric heating tool 51 to slide upward, the electric heating tool 51 can cut off the film section between the two rewinding shafts 32, dividing it into two parts to form two film ends, of which the film end close to the standby position belongs to a part of the film roll 100, and the film end close to the rewinding position belongs to a part of the film on the unwinding shaft 2, thereby realizing the automatic separation of the film roll 100 and the film on the unwinding shaft 2, realizing the independence of the film roll 100, and facilitating its removal by the clamp 432.

[0045] The electrically heated cutter 51 is uniformly distributed with multiple air holes 511 near the blade. An internal air cavity, connected to these holes 511, is designed to accommodate an external air blowing device. After the film section is cut, the air holes 511 are used to blow air toward the film end near the rewinding station, separating it from the electrically heated cutter 51 and preventing it from adhering to the cutter. This airflow allows the film end to adhere to the rewinding shaft 32 at the rewinding station, where it connects to the shaft and facilitates subsequent rewinding.

[0046] Continue to refer Figures 1 to 5 When the film section is cut, although the film roll 100 has achieved its own independence, the tensioning force acting on the film roll 100 also disappears simultaneously. Without the connection and restraint of the film on the unwinding shaft 2, the film roll 100 may shrink and deform, resulting in overall slackness, failing to achieve the expected tight winding effect. Therefore, it may cause the film end near the standby position to be difficult to be completely rolled.

[0047] To this end, the free end of the push plate 42 extends between the two rewinding shafts 32, and the upper surface of the push plate 42 is evenly distributed with multiple suction holes 423. The interior of the push plate 42 is provided with an interlayer air cavity connected to the suction holes 423, and the interlayer air cavity can be connected to an external suction device.

[0048] When the aforementioned V-shaped groove 434 engages the film roll 100, the free end of the push plate 42 also contacts the film segment during its upward movement, creating a suitable pressure between the two segments. A stopper 431 is fixed to the support seat 43, located below the push plate 42. When the push plate 42 presses against the film segment, the push plate 42 is pressed downward, and the stopper 431 is used to limit the deflection position of the arched plate 421. The electrically heated cutter 51 then cuts the film segment. In this embodiment, the cutting position of the electrically heated cutter 51 can be positioned adjacent to the pressure position of the free end of the push plate 42. This allows the film end near the standby position after cutting to smoothly transition to the free end of the push plate 42. At the same time, the suction equipment has started to evacuate air, and the suction hole 423 adsorbs the end of the film near the standby position. Under the action of the adsorption force, the end of the film is locked to prevent it from shrinking and deforming. The adsorption force thus replaces the aforementioned tensioning force, maintaining the effect of pulling the film, so that the film roll 100 maintains a tightly wound state, avoiding the relaxation of the film roll 100.

[0049] Afterwards, the rewinding shaft 32 at the standby position gradually rotates, gradually winding the film end near the standby position. During the winding process, the suction force of the suction hole 423 is not interrupted, so that the tight state of the film roll 100 can be continuously maintained. The film end near the standby position is attracted by the suction force and gradually transferred to the rewinding shaft 32 at the standby position along the upper plate surface of the push plate 42. This ensures the tightness of the film during winding, realizes the complete winding of the film end, and ensures the quality of the film roll 100 after forming.

[0050] When the film is adsorbed by the air suction hole 423 , the film may penetrate into the air suction hole 423 due to the adsorption force, and thus the film may be deformed, damaged, or have pits.

[0051] To this end, the push plate 42 is an arched plate 421, with the arched surface of the arched plate 421 facing upward, forming the upper plate surface of the push plate 42. The arched design makes the transfer path of the film end smoother. A flexible breathable layer 424 is laid on the arched surface of the arched plate 421. After the film section is cut, the film end near the standby position is adsorbed on the surface of the flexible breathable layer 424 of the push plate 42. The flexible breathable layer 424 acts as an intermediate medium to avoid direct contact between the film end and the suction hole 423. Its soft and flat characteristics protect the film end and also appropriately disperse the adsorption force, making the adsorption of the film end more uniform.

[0052] Continue to refer Figure 1 and Figure 2 The rewinding shaft 32 is an inflatable shaft 321. When the film roll 100 is supported by the aforementioned V-shaped groove 434, the film roll 100 can be coaxial with the rewinding shaft 32 in the standby position. After the film roll 100 is rolled into shape, the inflatable shaft 321 can be retracted inward, forming a circumferential separation area between the outer ring of the inflatable shaft 321 and the film roll 100, thereby separating the inflatable shaft 321 from the inner layer of the film roll 100.

[0053] The supporting effect of the V-shaped groove 434 stabilizes the axis of the film roll 100, preventing the film roll 100 from being pressed down on the inflatable shaft 321 due to gravity after the inflatable shaft 321 shrinks, thereby reducing the extrusion deformation of the inner layer of the film roll 100. In addition, because the film itself has a certain degree of stickiness, if the film roll 100 continues to press down on the inflatable shaft 321, the contact portion of the film roll 100 is likely to adhere to the inflatable shaft 321. When the clamp 432 subsequently removes the film, the film roll 100 may be scratched or torn due to the adhesion and friction forces. The circumferential spacing between the inflatable shaft 321 and the film roll 100 can weaken the above-mentioned scratching and tearing phenomena, ensuring the reliable removal of the film roll 100.

[0054] refer to Figures 1 to 5 The working process of the paperless tube winding device of the present invention includes the following steps: The first step is rewinding. The main motor 33 adjusts the rotational position of the flip seat 31 so that the two rewinding shafts 32 are on the same horizontal plane. The rewinding shaft 32 in the rewinding position receives the film unwound by the unwinding shaft 2, while the rewinding shaft 32 in the standby position is idle and does not connect with the film. The auxiliary motor 36 drives the rewinding shaft 32 to rotate, and the rewinding shaft 32 in the rewinding position begins to rewind the film, completing the rewinding. After rewinding is completed, the main motor 33 drives the flip seat 31 to flip 180°, swapping the positions of the two rewinding shafts 32. The rewinding shaft 32 with the film roll 100 is in the standby position, and the unrewound rewinding shaft 32 is in the rewinding position. A straight film section is formed between the two rewinding shafts 32.

[0055] In the second step, support, the lifter 11 controls the support platform 41 to move upward. When the free end of the push plate 42 contacts the film segment, the tension in the film segment creates an obstacle, forcing the push plate 42 to deflect downward. The limiter block 431 limits the push plate 42's maximum deflection position. When the V-shaped groove 434 engages the film roll 100, it supports and accommodates the film roll 100. Simultaneously, the two latches 432 engage on either side of the film roll 100, restraining it and facilitating its removal. At this point, the lifter 11 stops.

[0056] The third step is cutting. The telescopic device 12 controls the electric heating cutter 51 to move upward until it cuts the film segment, dividing the film segment into two parts, forming two film ends. At the same time, the air hole 511 blows air, blowing the film end near the rewinding position away from the electric heating cutter 51 to prevent it from sticking to the electric heating cutter 51. Under the action of the airflow, the film end can be attached to the rewinding shaft 32 at the rewinding position, connecting with the rewinding shaft 32, facilitating subsequent rewinding of the rewinding shaft 32.

[0057] The fourth step is rolling and forming. During cutting, the suction holes 423 have begun to absorb air, thereby forming an adsorption force on the film. When the film section is cut, the film end near the standby position is adsorbed on the flexible breathable layer 424. Next, the auxiliary motor 36 is started to drive the rewinding shaft 32 with the film roll 100 to rotate. The film end near the standby position gradually transitions from the surface of the flexible breathable layer 424 to the film roll 100, achieving complete rolling. It is worth noting that when the auxiliary motor 36 is started, the rewinding shaft 32 at the rewinding position also begins to rotate, winding the attached film end. Since the film end is part of the film on the unwinding shaft 2, the rewinding shaft 32 at the rewinding position rewinds the film on the unwinding shaft 2.

[0058] The fifth step is to remove the film. After the rolling is completed, the inflatable shaft 321 in the standby position shrinks. At this time, the film roll 100 will not fall under the support of the V-shaped groove 434, thereby maintaining its concentric state with the inflatable shaft 321, and there is a circumferential spacing area between the two. Then, the linear drive device 44 drives the support seat 43 to slide, and the clamp 432 removes the film roll 100 from the inflatable shaft 321. During the removal, the supporting effect of the V-shaped groove 434 is always present, so that the film roll 100 will not fall in the vertical direction. This avoids the problems of extrusion deformation and quality degradation caused by the falling impact of the film roll 100, and ensures the uniformity and flatness of the finished film roll 100. When the film roll 100 is removed, it enters the unloading position synchronously, and the linear drive device 44 stops at this time.

[0059] The sixth step is unloading. The lifter 11 drives the push plate 42 downward via the support platform 41. The push plate 42 is blocked by the stopper 13 and deflected upward. The push plate 42 pushes the film roll 100 from the V-shaped groove 434, allowing it to pass the stopper 433. During this process, the air intake 423 blows air into the film roll 100 to assist in its removal. The film roll 100 then rolls into the roll storage frame 14, where it is stored. When the lifter 11 drives the support platform 41 upward to reset, the push plate 42 moves upward with it. Under the elastic force of the torsion spring 422, the push plate 42 returns to its original position.

[0060] Repeat the above steps to achieve continuous rewinding of the film.

[0061] In this embodiment, the shifting member 433 may be a columnar body, a rod-shaped body, a strip-shaped body, etc., without limitation. The clamping member 432 is specifically a shifting plate having a crescent-shaped notch that matches the diameter of the rewinding shaft 32. In addition, the clamping member 432 may also be a shifting piece with a shape similar to that of the shifting plate.

[0062] In this embodiment, the flexible breathable layer 424 can be a soft sponge layer, or a velvet layer with a breathable cloth outer layer and velvet filled inside.

[0063] In this embodiment, the lifter 11 and the telescopic device 12 can be any one of a hydraulic cylinder, a pneumatic cylinder, an electric push rod, and a telescopic motor.

[0064] In this embodiment, the linear drive device 44 can be any one of a screw-nut mechanism and an electric guide rail.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0067] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A paper tube-free winding device, comprising a frame (1) and a rewinding mechanism (3) mounted on the frame (1), the rewinding mechanism (3) comprising a rewinding shaft (32) for rewinding a film, characterized in that: The frame (1) is provided with a support platform (41) located below the rewinding shaft (32), and a lifter (11) for driving the support platform (41) to move up and down; the support platform (41) is provided with a support seat (43) which is slidable along the axial direction of the rewinding shaft (32); the support seat (43) is provided with a stopper (433) and a push plate (42); a V-shaped groove (434) extending in the axial direction of the rewinding shaft (32) is formed between the stopper (433) and the push plate (42); the V-shaped groove (434) is used to accommodate the film roll (100) on the rewinding shaft (32); and the support seat (43) is fixed with two ends of the V-shaped groove (434) and are connected to the rewinding shaft. The frame (1) has a discharging position which is located on the sliding path of the supporting seat (43) and beside the rewinding shaft (32); the frame (1) is provided with an inclined coil storage frame (14) at the discharging position; the upper end of the coil storage frame (14) is flush with the height position of the stopper (433); the push plate (42) can be elastically twisted relative to the supporting seat (43); when twisting, the push plate (42) can push the film coil (100) through the stopper (433) to allow the film coil (100) to roll into the coil storage frame (14).

2. The paper tube-free winding device according to claim 1, characterized in that: The frame (1) is further provided with a limiting member (13) located below the push plate (42) at the unloading position, and the limiting member (13) is used to block the push plate (42) when the supporting seat (43) moves downward, so that the push plate (42) is twisted.

3. The paper tube-free winding device according to claim 1, characterized in that: The rewinding mechanism (3) further comprises a turning seat (31) which is turnably mounted on the frame (1); two rewinding shafts (32) are provided and are mounted in parallel on the turning seat (31); the two rewinding shafts (32) can be switched positions when the turning seat (31) turns over, and the two switched positions respectively form a rewinding position and a standby position; an unwinding shaft (2) adjacent to the rewinding position is rotatably mounted on the frame (1), and an initial film is wound on the unwinding shaft (2); The frame (1) is provided with a cutting mechanism (5) located between the rewinding position and the standby position, and the cutting mechanism (5) is used to cut the film section between the two rewinding shafts (32).

4. The paper tube-free winding device according to claim 3, characterized in that: The push plate (42) is arranged at an angle, the free end of the push plate (42) extends between the two rewinding shafts (32) and is capable of contacting the film section between the two rewinding shafts (32), and the upper plate surface of the push plate (42) is provided with suction holes (423) for adsorbing the film and capable of being connected to an external suction device.

5. The paper tube-free winding device according to claim 4, characterized in that: The push plate (42) is an arched plate (421) with an arched surface facing upwards, and a flexible breathable layer (424) is laid on the arched surface of the arched plate (421). After the cutting mechanism (5) cuts the film segments, the end of the film close to the standby position is adsorbed on the flexible breathable layer (424).

6. The paper tube-free winding device according to claim 3, characterized in that: The rewinding shaft (32) is an inflatable shaft (321), and the inflatable shaft (321) is used to shrink inward after the film roll (100) on the rewinding shaft (32) in the standby position is supported by the V-shaped groove (434), so as to separate the inflatable shaft (321) from the inner layer of the film roll (100).

7. The paper tube-free winding device according to claim 3, characterized in that: The cutting mechanism (5) comprises an electric heating cutter (51) and a telescopic device (12); the electric heating cutter (51) is capable of sliding up and down relative to the frame (1); and the telescopic device (12) is mounted on the frame (1) and is used to drive the electric heating cutter (51) to slide.

8. The paper tube-free winding device according to claim 7, characterized in that: The electric heating cutter (51) is provided with a plurality of blowing holes (511) capable of being connected to an external blowing device. The blowing holes (511) are used to blow air toward the end of the film close to the rewinding position after the film section is cut, so as to separate it from the electric heating cutter (51).

9. The paper tube-free winding device according to claim 1, characterized in that: The supporting platform (41) is provided with a linear drive device (44) for controlling the sliding of the supporting seat (43).

10. The paper tube-free winding device according to claim 3, characterized in that: A main drive mechanism and a secondary drive mechanism are mounted on the frame (1), the main drive mechanism being used to control the turning of the turning seat (31), and the secondary drive mechanism being used to control the rotation of the rewinding shaft (32).

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