A paper tube-free winding device

Abstract

The present invention relates to the technical field of winding materials, and specifically discloses a paperless tube winding device, wherein a frame is provided with a supporting platform located below a rewinding shaft, a lifter for driving the supporting platform to move up and down, a slidable supporting seat is provided on the supporting platform, a stopper and a material pushing plate are provided on the supporting seat, a V-shaped groove for accommodating the film coil on the rewinding shaft is formed between the stopper and the material pushing plate, and a clamp formed at both ends of the V-shaped groove is fixed on the supporting seat; the frame is provided with an inclined coil storage frame at the unloading position, and the upper end of the coil storage frame is flush with the height position of the stopper, and when the material pushing plate is twisted, the film coil can be pushed through the stopper to make the film coil roll into the coil storage frame. The paperless tube winding device of the present invention avoids the film coil from falling through the support of the supporting seat and the movement of the clamp, thereby avoiding the collision and extrusion deformation of the film coil, and ensuring the uniformity and flatness of the finished film coil.

Description

Technical Field

[0001] The 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 an efficient protective packaging material, mainly used to wrap and protect various products. The film has excellent flexibility, ductility, impact resistance and adhesion, so it has been widely used in hardware, electronics, chemicals, food and beverage and other industries. The purpose of rewinding stretch film is to optimize storage, transportation and use efficiency. The produced roll is wound into a large diameter unwinding shaft, and rewound through specific equipment to convert it into multiple smaller diameter and more compact roll forms. This conversion is not only convenient for storage and handling, but also improves the convenience of operation and the smoothness of packaging operations.

[0003] The Chinese patent document with the authorization announcement number CN217626622U discloses a new type of winding film rewinding machine, including a machine body, a slide, a cutter and a shifting block. The machine body is provided with two reels with rotatable and replaceable positions, and the reels are used to cover the paper rolls for winding the winding film; the driving component can drive the slide to reciprocate along the axis of the reel; the cutter is fixedly arranged on the slide and used to cut the winding film; the shifting block is rotatably arranged on the slide, and in the reciprocating motion made by the slide, it successively makes an evasive motion and a motion of pushing the paper roll away from the reel. In use, after the paper roll on the reel close to the auxiliary roller is rewound, the reel rotates downward and the other reel rotates upward, thereby exchanging the positions of the two reels. Then, the driving component drives the slide to slide, and then drives the cutter to pass between the two reels, so that the winding film section between the two reels can be cut, so that the winding film rewound on the paper roll is independent. In this process, the shifting block is in an evasive state and will not affect the paper roll. Then the slide starts to move back, and the shifting block starts to push the rewound paper tube away from the reel, realizing the function of automatic unloading.

[0004] In the prior art, a transfer platform is usually set beside the reel. When the paper roll is pushed away from the reel, it can fall onto the transfer platform. In order to avoid friction between the film roll on the paper roll and the transfer platform, the transfer platform is usually set lower than the reel. However, this may cause the paper roll to fall unbalancedly when it is unloaded, that is, one end sinks and the other end rises. The two ends of the paper roll may not fall on the transfer platform at the same time, which may easily cause the film roll on the paper roll to deform due to collision and extrusion, affecting product quality. Summary of the invention

[0005] The present invention provides a paper tube-free winding device, aiming to solve the problem in the related art that a paper tube may collide, be squeezed and deformed 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, and a lifter for driving the supporting platform to move up and down, the supporting platform is provided with a supporting seat slidable along the axial direction of the rewinding shaft, the supporting seat is provided with a stopper and a push plate, 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 support seat is fixed with clamps formed at both ends of the V-shaped groove and adapted to the rewinding shaft, and the two clamps are used to limit the film roll in the middle; the frame has a unloading position which is on the sliding path of the support 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 stopper, and the push plate can be elastically twisted relative to the support seat. When twisting, the push plate can push the film roll through the stopper to make the film roll roll into the roll storage frame.

[0007] The effect is that when the film is rolled and a film coil is formed on the rewinding shaft, the lifter can control the support platform to move up until the V-shaped groove is buckled upward on the film coil. At this time, the V-shaped groove supports and accommodates the film coil. At the same time, two clamps are clamped on both sides of the film coil, and then the support seat is slid. The clamps can move the film coil and pull the film coil off the rewinding shaft. Since the V-shaped groove has supported the film coil in advance, the film coil moves smoothly when it is pulled down, and there will be no problem of falling in the vertical direction. This avoids the problems of extrusion deformation and quality degradation caused by the falling and impact of the film coil, and ensures the uniformity and flatness of the finished film coil.

[0008] When the clamp pushes the film roll down, it enters the unloading position at the same time. Then, the push plate is twisted upward, and the push plate pushes the film roll over the stopper, and the film roll leaves the V-shaped groove and rolls into the roll storage frame. Since the upper end of the roll storage frame is flush with the height position of the stopper, the film roll does not fall when rolling from the stopper to the roll storage frame, but rolls smoothly in transition, thus protecting the film roll, avoiding problems such as extrusion and deformation of the film roll, and ensuring the quality of the film roll.

[0009] Preferably, the frame is further provided with a limiter located below the push plate at the unloading position, and the limiter 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 the manpower.

[0011] Preferably, the rewinding mechanism also includes a turning seat which is flipably mounted on the frame, there are two rewinding shafts which are mounted in parallel on the turning seat, and the two rewinding shafts can swap positions when the turning seat is flipped, and a rewinding position and a standby position are formed in the two swapped positions respectively; a unwinding shaft adjacent to the rewinding position is rotatably mounted on the frame, and an initial film is wound on the unwinding shaft; a cutting mechanism is provided on the frame between the rewinding position and the standby position, and the cutting mechanism is used for cutting 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 when the V-shaped groove is buckled on the film coil, the free end of the push plate also contacts the film section during the upward movement, and generates appropriate extrusion between the film section and the film section. After that, the cutting mechanism cuts the film section, and the film section forms two film ends after cutting. The film end near the standby position can smoothly transition to the free end of the push plate. At the same time, the suction device has begun to evacuate air, and the suction hole adsorbs the film end near the standby position. Under the action of the adsorption force, the film end is locked to avoid its shrinkage and deformation. Therefore, the adsorption force maintains the effect of pulling the film, so that the film coil maintains a tightly wound state and avoids the relaxation of the film coil.

[0014] Afterwards, the rewinding shaft at the standby position gradually rotates, and the end of the film near the standby position is gradually wound up. 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 maintained continuously, and the end of the film near the standby position will be 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 rolling of the film end, and ensures 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 off, the film end close to 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, and the inflatable shaft 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 effect is that the supporting effect of the V-shaped groove 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 shrinks, thereby reducing the extrusion deformation of the inner layer of the film roll. In addition, since the film itself has a certain viscosity, if the film roll continues to be pressed down on the air shaft, the contact part of the film roll is easy to adhere to the air shaft. When the card is subsequently removed, the film roll may be scratched or torn due to the adhesion and friction of the film roll. The setting of the circumferential spacing between the air shaft and the film roll can weaken the above-mentioned scratching and tearing phenomena and ensure the reliable removal of the film roll.

[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, and 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 between the end of the film 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 of the turning seat, and the auxiliary driving mechanism is used to control the rotation of the rewinding shaft.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are as follows:

[0025] The present invention supports the film coil in advance by the supporting seat, and then removes the film coil by the clamping member, 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 impact, and ensures the uniformity and flatness of the finished film coil. After that, the push plate 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 it rolls from the stopper to the coil storage frame, but rather rolls in a smooth transition, thereby protecting the film coil, avoiding the problems of extrusion deformation of the film coil, and ensuring the quality of the film coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] 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.

[0028] Figure 3 It is a three-dimensional schematic diagram of the portion from the supporting seat to the push plate of the present invention.

[0029] Figure 4 It is an exploded schematic diagram of the portion from the supporting seat to the push plate of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the electric heating cutter of the present invention when it moves upward.

[0031] Reference numerals:

[0032] 100. Film roll material;

[0033] 1. Frame; 11. Lifter; 12. Telescopic device; 13. Limiting member; 14. Coil storage frame;

[0034] 2. Release the reel;

[0035] 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;

[0036] 41. Support platform; 42. Push plate; 421. Arch plate; 422. Torsion spring; 423. Air suction hole; 424. Flexible breathable layer; 43. Support seat; 431. Limiting inclined block; 432. Clamp; 433. Stopper; 434. V-shaped groove; 44. Linear drive device;

[0037] 5. Cutting mechanism; 51. Electric heating tool; 511. Blowing hole. DETAILED DESCRIPTION

[0038] 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.

[0039] Combine the following Figures 1 to 5 The paper tube-free winding device of the present invention is described.

[0040] like Figure 1 and Figure 2 As shown, the paper tube-free winding device of the present invention includes a frame 1, a rewinding mechanism 3, and a cutting mechanism 5.

[0041] The rewinding mechanism 3 is mounted on the frame 1, and the rewinding mechanism 3 includes a turning seat 31 and a rewinding shaft 32. A turning shaft 311 is fixedly arranged at the center of the turning seat 31, and the turning shaft 311 is rotatably mounted on the frame 1. The turning seat 31 can realize a 180° turning action through the turning shaft 311. A main driving mechanism for controlling the turning of the turning seat 31 is mounted on the frame 1. The main driving mechanism includes a main motor 33 and a belt transmission mechanism. The main motor 33 is mounted on the frame 1, and the belt transmission mechanism connects the main motor 33 and the turning shaft 311. When the main motor 33 is started, the turning shaft 311 is driven to rotate through the belt transmission mechanism, and the turning shaft 311 drives the turning seat 31 to turn.

[0042] There are two rewinding shafts 32 which are rotatably mounted on the flip seat 31 in parallel. The two rewinding shafts 32 are symmetrical about the flip shaft 311. A sub-driving mechanism for controlling the rotation of the rewinding shaft 32 is mounted on the frame 1. The sub-driving mechanism includes a sub-motor 36, a transmission sleeve 34, a first belt mechanism, and a second belt mechanism 35. The sub-motor 36 is mounted on the frame 1; the transmission sleeve 34 is sleeved on the flip shaft 311 and is rotatably connected to the frame 1, and the transmission sleeve 34 can rotate freely relative to the flip shaft 311; the first belt mechanism connects the sub-motor 36 and the transmission sleeve 34; the number of the second belt mechanisms 35 is equal to that of the rewinding shafts 32 and corresponds one to one, and the second belt mechanism 35 connects the corresponding rewinding shafts 32 and the transmission sleeve 34. When the sub-motor 36 is started, the transmission sleeve 34 is driven to rotate through the first belt mechanism, and the transmission sleeve 34 drives the rewinding shaft 32 to rotate through the second belt mechanism 35.

[0043] The unwinding shaft 2 located at the rear side of the turning seat 31 is rotatably mounted on the frame 1, and the initial film is wound on the unwinding shaft 2. It can be understood that the film is a wrapping film. The two rewinding shafts 32 can be swapped when the turning seat 31 is turned over, and the two swapped positions form a rewinding position and a standby position respectively. Among them, the rewinding position is close to the unwinding shaft 2, and the standby position is far away from the unwinding shaft 2.

[0044] In the initial state, the two rewinding shafts 32 are in the same horizontal plane, one of the rewinding shafts 32 is in the rewinding position, and the other rewinding shaft 32 is in the standby position. The rewinding shaft 32 in the rewinding position is connected to the film released 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 realizing rewinding. When the film forms a film roll 100 and the rewinding is completed, the auxiliary motor 36 is turned off, and the main motor 33 drives the flip seat 31 to flip, so that the rewinding shaft 32 in the rewinding position flips downward, and the rewinding shaft 32 in the standby position flips upward. As the flip seat 31 flips 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 is not rewound is in the rewinding position. At this time, a straight film section is formed from the film roll 100 to 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 .

[0045] 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 fixedly disposed on the supporting seat 43 . Both clamping members 432 are adapted to the rewinding shaft 32 . The two clamping members 432 are used to restrict the film roll 100 in the middle.

[0046] When the rewinding shaft 32 with the film coil 100 is in the standby position, the lifter 11 can control the support platform 41 to move upward until the V-shaped groove 434 is buckled upward on the film coil 100. At this time, the V-shaped groove 434 supports and accommodates the film coil 100. At the same time, the two clamps 432 are clamped on both sides of the film coil 100, and then the linear drive device 44 drives the support seat 43 to slide. The clamps 432 can move the film coil 100 and remove the film coil 100 from the rewinding shaft 32. Since the V-shaped groove 434 has supported the film coil 100 in advance, the film coil 100 moves smoothly when it is removed, and there will be no problem of falling in the vertical direction. This avoids the problems of extrusion deformation and quality degradation of the film coil 100 caused by falling and impact, and ensures the uniformity and flatness of the finished film coil 100.

[0047] The frame 1 has a discharge position located beside 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, and the upper end of the coil storage frame 14 is flush with the height position of the stopper 433. The connecting end of the push plate 42 is hinged with the support seat 43, and a torsion spring 422 is also connected between the connecting end of the push plate 42 and the support seat 43. The torsion spring 422 keeps the push plate 42 in an upward tilted posture in a natural state. The frame 1 is also fixed with a limiter 13 located below the push plate 42 at the discharge position.

[0048] When the clamp 432 pushes the film coil 100 down, it enters the unloading position at the same time. Then, the lifter 11 controls the support platform 41 to move downward, and the support platform 41 drives the push plate 42 to move downward through the support seat 43. The limiter 13 is used to block the push plate 42, so that the push plate 42 deflects upward. At this time, the push plate 42 pushes the film coil 100 to cross the stopper 433, and the film coil 100 leaves the V-shaped groove 434 and rolls into the coil storage frame 14. Since the upper end of the coil storage frame 14 is flush with the height position of the stopper 433, when the film coil 100 rolls from the stopper 433 to the coil storage frame 14, it will not fall, but will roll smoothly in transition, thereby protecting the film coil 100, avoiding problems such as extrusion deformation of the film coil 100, and ensuring the quality of the film coil 100.

[0049] 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.

[0050] The cutting mechanism 5 comprises 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.

[0051] 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, wherein 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, and realizing the independence of the film roll 100, which is convenient for being pulled off by the clamp 432.

[0052] The portion of the electric heating cutter 51 adjacent to the blade is uniformly provided with a plurality of blowing holes 511, and the interior of the electric heating cutter 51 is provided with an intermediate air cavity connected to the blowing holes 511, and the intermediate air cavity can be connected to an external blowing device. After the film section is cut, the blowing holes 511 are used to blow air to the end of the film near the rewinding position to separate it from the electric heating cutter 51 and prevent it from sticking to the electric heating cutter 51. Under the action of the airflow, the end of the film can be attached to the rewinding shaft 32 at the rewinding position and connected to the rewinding shaft 32, which is convenient for the subsequent rewinding of the rewinding shaft 32.

[0053] 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 make it difficult to completely roll up the film end near the standby position.

[0054] To this end, the free end of the push plate 42 extends between the two rewinding shafts 32, and the upper plate 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.

[0055] When the aforementioned V-shaped groove 434 is buckled on the film roll 100, the free end of the push plate 42 also contacts the film segment during the upward movement, and generates appropriate extrusion between the push plate 42 and the film segment. The support seat 43 is fixed with a limiting inclined block 431 located below the push plate 42. When the push plate 42 is pressed against the film segment, the push plate 42 will be pressed and deflected downward. The limiting inclined block 431 is used to limit the deflection position of the arch plate 421. Afterwards, the electric heating cutter 51 cuts the film segment. In this embodiment, the cutting position of the electric heating cutter 51 can be close to the extrusion position of the free end of the push plate 42, so that the end of the film near the standby position after cutting can 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 relaxation of the film roll 100.

[0056] Afterwards, the rewinding shaft 32 at the standby position gradually rotates, and the film end near the standby position is gradually wound up. During the winding process, the adsorption force of the suction hole 423 is not interrupted, so that the tight state of the film roll 100 can be continuously maintained, and the film end near the standby position will be attracted by the adsorption force and gradually transferred to the rewinding shaft 32 at the standby position along the upper plate surface of the push plate 42. In this way, the tightness of the film during winding is ensured, the complete winding of the film end is achieved, and the quality of the film roll 100 after forming is ensured.

[0057] 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, so that the film may be deformed, damaged or have pits.

[0058] For this purpose, the push plate 42 is an arched plate 421, and the arched surface of the arched plate 421 faces upward, which constitutes 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 appropriately disperse the adsorption force, making the adsorption of the film end more uniform.

[0059] Continue to refer Figure 1 and Figure 2 , the rewinding shaft 32 is an inflatable shaft 321. When the aforementioned V-shaped groove 434 supports the film roll 100, the film roll 100 can be coaxial with the rewinding shaft 32 at the standby position under the supporting effect of the V-shaped groove 434. After the film roll 100 is rolled into shape, the inflatable shaft 321 can shrink inward, and the outer ring of the inflatable shaft 321 can form a circumferential spacing area with the film roll 100, so that the inflatable shaft 321 is separated from the inner layer of the film roll 100.

[0060] The supporting effect of the V-shaped groove 434 stabilizes the axis of the film roll 100, and prevents the film roll 100 from being pressed down on the air shaft 321 due to gravity after the air shaft 321 shrinks, thereby reducing the extrusion deformation of the inner layer of the film roll 100. In addition, since the film itself has a certain viscosity, if the film roll 100 continues to be pressed down on the air shaft 321, the contact part of the film roll 100 is easy to adhere to the air shaft 321. When the clamp 432 is subsequently removed, the film roll 100 may be scratched or torn under the action of adhesion and friction. The setting of the circumferential interval between the air shaft 321 and the film roll 100 can weaken the above-mentioned scratches and tears, and ensure the reliable removal of the film roll 100.

[0061] refer to Figures 1 to 5 The working process of the paperless tube winding device of the present invention comprises the following steps:

[0062] The first step is rewinding. The main motor 33 adjusts the rotation position of the flip seat 31 so that the two rewinding shafts 32 are in the same horizontal plane. The rewinding shaft 32 in the rewinding position receives the film released by the unwinding shaft 2, and the rewinding shaft 32 in the standby position is empty and not connected to the film. The auxiliary motor 36 drives the rewinding shaft 32 to rotate, and the rewinding shaft 32 in the rewinding position starts to rewind the film to achieve rewinding. After the rewinding is completed, the main motor 33 drives the flip seat 31 to flip 180°, so that the positions of the two rewinding shafts 32 are swapped. The rewinding shaft 32 with the film roll 100 is in the standby position, and the rewinding shaft 32 that is not rewound is in the rewinding position. There is a straight film section between the two rewinding shafts 32.

[0063] The second step is to support. The lifter 11 controls the support platform 41 to move upward. When the free end of the push plate 42 contacts the film section, the film section has tension, which will hinder the push plate 42 and force the push plate 42 to deflect downward. The limit bevel 431 is used to limit the extreme deflection position of the push plate 42. When the V-shaped groove 434 is engaged with the film roll 100, the V-shaped groove 434 supports and accommodates the film roll 100. At the same time, the two clamps 432 are engaged on both sides of the film roll 100 to limit the film roll 100 and facilitate its removal. At this time, the lifter 11 stops.

[0064] The third step is cutting. The telescopic device 12 controls the electric heating cutter 51 to move upward until the electric heating cutter 51 cuts off the film segment, so that the film segment is divided into two parts to form two film ends. At the same time, the blowing hole 511 blows air to blow 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 and connected to the rewinding shaft 32, which is convenient for the subsequent rewinding of the rewinding shaft 32.

[0065] The fourth step is rolling and forming. During cutting, the air suction hole 423 has begun to suck 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, and the film end near the standby position gradually transitions from the surface of the flexible breathable layer 424 to the film roll 100 to achieve complete rolling. It is worth noting that when the auxiliary motor 36 is started, the rewinding shaft 32 at the rewinding position also starts to rotate and winds 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.

[0066] The fifth step is to remove the material. When the rolling is completed, the air 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 air 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 air shaft 321. When removing it, the supporting effect of the V-shaped groove 434 always exists, so that the film roll 100 will not fall in the vertical direction, thereby avoiding the problems of extrusion deformation and quality degradation of the film roll 100 caused by falling and impact, and ensuring 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.

[0067] The sixth step is unloading. The lifter 11 drives the push plate 42 to move downward through the support platform 41. The push plate 42 is blocked by the stopper 13 and deflects upward. The push plate 42 pushes the film coil 100 in the V-shaped groove 434 to pass the stopper 433. When pushing, the air suction hole 423 can also blow air to the film coil 100 to help push the film coil 100 out. Then, the film coil 100 rolls into the coil storage frame 14 to achieve storage in the coil storage frame 14. Afterwards, when the lifter 11 drives the support platform 41 to move upward and reset, the push plate 42 moves upward accordingly. Under the elastic force of the torsion spring 422, the push plate 42 can return to its original position.

[0068] Repeat the above steps to achieve continuous rewinding of the film.

[0069] In this embodiment, the stopper 433 may be a columnar body, a rod-shaped body, a strip-shaped body, etc., which is not limited here. The clamping member 432 is specifically a dial plate, which has a crescent-shaped notch that matches the diameter of the rewinding shaft 32. In addition, the clamping member 432 may also be a dial sheet, which is similar in shape to the dial plate.

[0070] 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.

[0071] 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.

[0072] In this embodiment, the linear drive device 44 can be any one of a screw nut mechanism and an electric guide rail.

[0073] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A paper tube-free winding device, comprising a frame and a rewinding mechanism mounted on the frame, the rewinding mechanism comprising a rewinding shaft for rewinding a film, characterized in that: The frame is provided with a supporting platform located below the rewinding shaft and a lifter for driving the supporting platform to move up and down, and a supporting seat is provided on the supporting platform which can slide along the axial direction of the rewinding shaft, and a stopper and a push plate are provided on the supporting seat, and 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 coil on the rewinding shaft, and the supporting seat is fixed with clamps formed at both ends of the V-shaped groove and adapted to the rewinding shaft. The two clamps are used to limit the film coil in the middle; the frame is provided with a unloading position which is on the sliding path of the supporting seat and is located beside the rewinding shaft, and the frame is provided with an inclined coil storage frame at the unloading position, and the upper end of the coil storage frame is flush with the height position of the stopper, and the push plate can be elastically twisted relative to the supporting seat, and during twisting, the push plate can push the film coil through the stopper to make the film coil roll into the coil storage frame; The frame is also provided with a limiter located below the push plate at the unloading position, and the limiter is used to block the push plate when the support seat moves downward, so that the push plate is twisted; The rewinding mechanism also includes a turning seat which is turnably mounted on the frame, and there are two rewinding shafts which are mounted in parallel on the turning seat. The two rewinding shafts can be swapped when the turning seat is turned over, and the two swapped positions form a rewinding position and a standby position respectively; an unwinding shaft adjacent to the rewinding position is rotatably mounted on the frame, and an initial film is wound on the unwinding shaft; The frame is provided with a cutting mechanism located between the rewinding position and the standby position, and the cutting mechanism is used to cut the film section between the two rewinding shafts; The push plate is arranged at an angle, and the free end of the push plate extends between the two rewinding shafts and can contact the film section between the two rewinding shafts. The upper plate surface of the push plate is provided with suction holes for adsorbing the film and can be connected to an external suction device; The push plate is an arched plate with the arch surface facing upwards, and a flexible breathable layer is laid on the arch surface of the arched plate. After the cutting mechanism cuts the film section, the end of the film close to the standby position is adsorbed on the flexible breathable layer.

2. The paper tube-free winding device according to claim 1, characterized in that: 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.

3. The paper tube-free winding device according to claim 1, characterized in that: 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. The telescopic device is installed on the frame and is used to drive the electric heating cutter to slide.

4. The paper tube-free winding device according to claim 3, characterized in that: The electric heating cutter is provided with a plurality of blowing holes which can be connected to an external blowing device. The blowing holes are used to blow air to the end of the film near the rewinding position after the film section is cut, so as to separate it from the electric heating cutter.

5. The paper tube-free winding device according to claim 1, characterized in that: The support platform is provided with a linear drive device for controlling the sliding of the support seat.

6. The paper tube-free winding device according to claim 1, characterized in that: A main driving mechanism and an auxiliary driving mechanism are installed on the frame, wherein the main driving mechanism is used to control the turning of the turning seat, and the auxiliary driving mechanism is used to control the rotation of the rewinding shaft.

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