A coaxial cutting structure for film rewinding and winding

Abstract

A coaxial cutting structure for film winding replacement, comprising a roller and a cutting device. A notch is provided on the roller, and the cutting device is arranged inside the roller and performs telescopic movement through the notch. The cutting device includes a toothed knife, a mounting tool holder, and a driving device. The mounting tool holder is arranged inside the roller. The toothed knife is detachably connected to the mounting tool holder and is located below the notch. The driving device is fixedly connected to the mounting tool holder. An arc-shaped guide groove is provided on the toothed knife, and the output end of the driving device moves movably in the arc-shaped guide groove and drives the toothed knife to slide up and down. In the present invention, the telescopic movement of the toothed knife is precisely controlled by the driving device, and the toothed knife adopts mobile cutting, effectively reducing the dependence on film tension. Moreover, with the help of the telescopic design of the toothed knife, on the premise of ensuring the cutting function, there is no need for too many auxiliary structures or high-power driving components, making the device structure more compact and lightweight, which helps to improve the performance of the equipment and extend its service life.

Description

Technical Field

[0001] The present invention relates to the technical field of tipping paper, and particularly to a coaxial cutting structure for film rewinding and replacing. Background Art

[0002] After the film is produced, it is wound around a paper core tube to form a film roll. Film winding includes the following two forms: center winding (the power comes from the winding shaft and is driven by a winding motor) and surface winding (the power comes from a friction roller, assisted by a pressure roller, and the friction roller is driven by a motor).

[0003] Moreover, there are main and standby winding shafts on the rack, which can move relative to the friction roller. The main winding shaft is used for normal winding, and the standby winding shaft is used for roll replacement. During roll replacement, when the film reaches a set length, the cutter cuts the film into two sections. The front section is continuously wound by the original film roll, and the rear section is adhered to the new main winding shaft. Currently, the cutter moves horizontally outside the friction roller.

[0004] During the roll replacement process, it is generally not possible to stop the machine. In this way, since the film is still running at high speed continuously during the process of the cutter moving along the width direction of the film for cutting, the tangent line formed by the cutter on the film is an oblique line, and the film part beside the tangent line is a right triangle, which is not beneficial to high - price and frequently replaced films.

[0005] Although the cutter installation structure of the prior patent (CN114147798B) can make the tangent direction of the film be the transverse direction of the film, it has the following problems:

[0006] (1) The cutter cuts the film vertically up and down, so there are certain requirements for the tension of the film, and there is a certain pulling deformation of the film, which has a certain impact on the production of high - quality films;

[0007] (2) The cutter structure is heavy and requires a large driving force, making the overall structure heavy and the roller operation prone to uneven weight;

[0008] (3) The structure is complex and the cutter is not easy to replace. Summary of the Invention

[0009] The purpose of the present invention is to provide a coaxial cutting structure for film rewinding and replacing, which solves the problems that the film cutter structure is heavy, not easy to replace, and has high requirements for the film tension during disassembly.

[0010] To achieve the above purpose, the present invention provides a coaxial cutting structure for film rewinding and replacing, which is characterized in that it includes a roller and a cutting device. A notch is provided on the roller, and the cutting device is arranged inside the roller and performs telescopic movement through the notch;

[0011] The cutting device includes a toothed cutter, a mounting tool rest, and a driving device. The mounting tool rest is arranged inside the roller. The toothed cutter is detachably connected to the mounting tool rest and is located below the notch. The driving device is fixedly connected to the mounting tool rest,

[0012] The tooth cutter is provided with an arc-shaped guide groove. The mounting tool holder includes rollers. The driving device drives the tooth cutter to reciprocate. The rollers pass through the arc-shaped guide groove and can move within the arc-shaped guide groove.

[0013] When the rollers move to the lowest end of the arc-shaped guide groove, the tooth cutter extends out of the slot opening; when the rollers move to the highest point of the arc-shaped guide groove, the tooth cutter retracts into the slot opening.

[0014] Preferably, one side of the tooth cutter is provided with inclined saw teeth, and the inclined saw teeth face the slot opening.

[0015] Preferably, the arc-shaped guide groove has two highest points with the same level, and the highest point of the arc-shaped guide groove is close to the side of the inclined saw teeth.

[0016] Preferably, the mounting tool holder includes a fixed tool holder and a movable tool holder. The fixed tool holder is fixed inside the roller. The movable tool holder moves closer to or away from the fixed tool holder. The tooth cutter is clamped between the fixed tool holder and the movable tool holder.

[0017] When the movable tool holder moves closer to the fixed tool holder, the tooth cutter is fixed to the mounting tool holder; when the movable tool holder moves away from the fixed tool holder, the tooth cutter is separated from the mounting tool holder.

[0018] Preferably, the movable tool holder includes a movable plate, a moving structure, and rollers. The moving structure is connected to the movable plate, and the moving structure drives the movable plate to move closer to or away from the fixed tool holder relative to the fixed tool holder. The moving structure is connected to the fixed tool holder, and one end of the rollers is connected to the arc-shaped guide groove.

[0019] When the movable plate moves closer to the fixed tool holder, the rollers are inserted into the arc-shaped guide groove, and the movable plate and the fixed tool holder clamp the tooth cutter.

[0020] Preferably, a vertical opening groove is provided at the lower end of the tooth cutter.

[0021] A clearance groove is provided on the side of the movable plate close to the fixed tool holder.

[0022] The fixed tool rest includes a connecting seat, a fixed plate, a fixed slider, a moving slide rail and a guide post. The fixed plate is arranged on the connecting seat. The moving plate is on the connecting seat and is arranged opposite to the fixed plate. The moving structure is connected to the connecting seat. An inner wall of one side of the fixed plate facing the moving plate is provided with a channel. The fixed slider is fixed in the channel. The moving slide rail is slidably connected to the fixed slider. The moving slide rail is fixedly connected to the guide post. The guide post passes through the vertical opening groove and extends into the clearance groove. The driving device is fixedly connected to the connecting seat and the output end is connected to the moving slide rail.

[0023] The driving device drives the moving slide rail to make a reciprocating motion, thereby driving the guide post to move in the arc-shaped guide groove.

[0024] Preferably, a fixing hole is provided on the moving slide rail. One end of the guide post is fixedly connected to the fixing hole, and the other end is inserted into the vertical opening groove.

[0025] Preferably, the moving structure includes a driving rod, a connecting member, an adjusting gear and an adjusting block. The driving rod is connected to the connecting seat through the connecting member. A plurality of adjusting gears are arranged on the driving rod. The driving rod drives the adjusting gears to rotate. The adjusting block is fixedly connected to the moving plate. A rack is provided at the lower end of the adjusting block. The adjusting gears are meshed with the rack.

[0026] The driving rod drives the adjusting gears to rotate, thereby moving the adjusting block and further driving the moving plate to move.

[0027] Preferably, adjusting wrench openings are respectively provided on both sides of the driving rod. The adjusting wrench openings are used to drive the driving rod to rotate.

[0028] Preferably, the moving structure further includes a locking member. The driving rod passes through the locking member. The locking member is fixedly connected to the connecting seat. The locking member is used to lock and fix the driving rod.

[0029] A through hole, an adjusting opening and an adjusting screw hole are provided on the locking member. The driving rod passes through the through hole. The adjusting opening is arranged on one side of the locking member and communicates with the through hole. The adjusting screw hole penetrates through the side where the adjusting opening is located.

[0030] Advantages of the present invention:

[0031] 1. In the present invention, the movement of the output end of the driving device in the arc-shaped guide groove drives the tooth knife to slide up and down to achieve the cutting action. Compared with the traditional puncture cutting, it is difficult to accurately control the puncture angle and force in the traditional method, and it depends on a relatively high film tension, which has high requirements for the pre-treatment of the film and the tension control of the winding and unwinding system, and may also damage the film.

[0032] 2. The telescoping of the toothed knife of the present invention is precisely controlled by a driving device, and the toothed knife uses mobile cutting. The film can be cut in a relatively stable state, effectively reducing the dependence on film tension. Moreover, with the help of the telescoping design of the toothed knife, this cutting structure requires no excessive auxiliary structures or high-power driving components while ensuring the cutting function, making the device structure more compact and lightweight, which helps to improve the performance of the equipment and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0034] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0035] Figure 2 It is a schematic sectional view of the present invention.

[0036] Figure 3 It is a schematic diagram of the structure of the toothed knife of the present invention.

[0037] Figure 4 It is a working principle diagram of the toothed knife of the present invention.

[0038] Figure 5 It is a schematic diagram of the structure of the mounting tool holder of the present invention.

[0039] Figure 6 It is a schematic sectional view of the mounting tool holder of the present invention.

[0040] Figure 7 It is a partial schematic diagram of the mounting tool holder of the present invention.

[0041] Figure 8 It is a schematic diagram of the process for replacing the toothed knife of the present invention.

[0042] Figure 9 is Figure 5 the enlarged view at A in

[0043] In the figure: roller 1; toothed knife 2; arc-shaped guide groove 21; inclined saw teeth 22; vertical opening groove 23; mounting tool holder 3; fixed tool holder 31; connecting seat 311; fixing plate 312; fixed slider 313; moving slide rail 314; guide post 315; moving tool holder 32; moving plate 321; clearance groove 3211; moving structure 322; driving rod 3221; connecting member 3222; adjusting gear 3223; adjusting block 3224; perforation 3225a; adjusting opening 3225b; adjusting screw hole 3225c; roller 323; driving device 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0045] As Figures 1-2 shown, a coaxial cutting structure for film rewinding and replacing includes a roller 1 and a cutting device. A notch is provided on the roller 1. The cutting device is arranged inside the roller 1 and performs telescopic movement through the notch. The cutting device includes a toothed knife 2, a mounting knife holder 3, and a driving device 4. The mounting knife holder 3 is arranged inside the roller 1. The toothed knife 2 is detachably connected to the mounting knife holder 3 and is located below the notch. The driving device 4 is fixedly connected to the mounting knife holder 3. An arc-shaped guide groove 21 is provided on the toothed knife 2. The mounting knife holder 3 includes a roller 323. The driving device 4 drives the toothed knife 2 to move back and forth. The roller 323 passes through the arc-shaped guide groove 21 and can move inside the arc-shaped guide groove 21. When the roller 323 moves to the lowest end of the arc-shaped guide groove 21, the toothed knife 2 extends out of the notch. When the roller 323 moves to the highest point of the arc-shaped guide groove 21, the toothed knife 2 retracts into the notch. In the present invention, the driving device 4 drives the toothed knife 2 to move. Under the limitation of the arc-shaped guide groove 21 and the roller 323, the toothed knife 2 realizes up and down sliding. When the roller 323 moves to the lowest end of the arc-shaped guide groove 21, the toothed knife 2 extends out of the notch and can cut the film. When the roller 323 moves to the highest point of the arc-shaped guide groove 21, the toothed knife 2 retracts into the notch to avoid damaging the film in the non-cutting area. It is difficult to accurately control the piercing angle and force in traditional piercing cutting, and it relies on a relatively high film tension, which places strict requirements on the pre-treatment of the film and the tension control of the rewinding and replacing system. At the same time, it may also damage the film. Different from the traditional piercing cutting method, the telescopic movement of the toothed knife 2 in this structure is accurately controlled by the driving device 4. And because the toothed knife 2 adopts a mobile cutting method, the film can be cut when it is in a relatively stable state, reducing the dependence on film tension. With the design of the telescopic movement of the toothed knife 2, this cutting structure, on the premise of ensuring the cutting function, does not need to adopt many auxiliary structures or high-power driving components, making the structure of the device more compact and lightweight, which is beneficial to improving the performance of the equipment and extending the service life of the equipment.

[0046] As Figure 3As shown, one side of the toothed knife 2 is provided with inclined saw teeth 22, and the inclined saw teeth 22 face the notch. The toothed knife 2 in this structure can move left and right by means of the guide groove, so that the film cutting method is cutting film cutting. When the traditional toothed knife 2 cuts the film, it adopts a straight up and down movement mode, and its film cutting principle is to pierce the film. Since the film has elasticity and toughness, the straight up and down toothed knife 2 needs to apply a greater pressure to pierce the film. This causes the film to bear a greater impact force at the moment of film cutting, which easily makes the film around the incision deform irregularly, and even tear severely in serious cases, having an adverse effect on the cutting quality. Moreover, this piercing film cutting requires the film to maintain a relatively high tension. Only in this way can the toothed knife 2 more easily pierce the film, which undoubtedly has a relatively high requirement for the tension control of the film. However, the inclined saw tooth 22 structure in the present invention changes the force application point of the cutter teeth on the film. The inclined angle of the inclined saw teeth 22 causes the distribution of the force application points to change. When the inclined saw teeth 22 contact the film, multiple inclined surfaces will contact the film surface at the same time, and each inclined surface will form a tiny force application point. These force application points act together to disperse a greater force to a region of the film rather than concentrating on one point, which helps to prevent local excessive deformation or damage of the film during cutting. Secondly, the inclined saw teeth 22 have a lower requirement for the film tension. Since the inclined saw teeth 22 change the distribution of the force application points, in the relatively loose state of the film, its inclined surface structure can gradually cut into the film like "climbing a slope". When the inclined saw teeth 22 move left and right in the guide groove, if the film contacts the longer side of the saw teeth, it will cut the film by pulling; when the film contacts the shorter side of the saw teeth, it will apply a downward pressure to the film during the downward movement to assist cutting. In this way, the film cutting force can be dispersed to a longer cutting line of the film, not only can the film cutting operation be carried out under a lower film tension, but also a neater and smoother incision can be obtained, improving the film cutting quality, and causing less damage to the film, which is beneficial to improving the subsequent use performance of the film. In addition, the toothed knife 2 in this structure adopts this cutting film cutting method and does not rely on a greater pressure to pierce the film like the traditional toothed knife 2, so the requirement for the power of the driving device 4 is lower. The lower power requirement helps to simplify the equipment structure, reduce the equipment manufacturing cost, and at the same time can optimize the overall structure to make the structure more lightweight and compact.

[0047] The arc-shaped guide groove 21 has two highest points with the same level, and the highest point of the arc-shaped guide groove 21 is close to the side of the inclined saw teeth 22. The arc-shaped guide groove 21 in the present invention is provided with two highest points. As Figure 4As shown, when the output device starts to push the toothed knife 2, it is pushed downward along the guide groove from the first highest point of the arc-shaped guide groove 21. During this pushing process, the position of the toothed knife 2 will gradually move from a relatively high position of the arc-shaped guide groove 21 towards the lowest point. As the pushing continues, the toothed knife 2 will gradually extend upward from the lowest point out of the notch. When the roller 323 is pushed to the lowest end of the arc-shaped guide groove 21, the toothed knife 2 reaches its highest point in this stroke; subsequently, when the output device continues to push, its movement direction changes to push from the lowest end of the arc-shaped guide groove 21 towards another highest point. During this process, the toothed knife 2 begins to gradually retract into the notch. As the pushing continues, when the roller 323 is pushed to the second highest point, the toothed knife 2 returns to the lowest point again. In this way, with only one push by the output device, the toothed knife 2 can complete a complete cycle of extending and retracting. And when the output device retracts, the toothed knife 2 will complete a complete cycle again according to the same mechanism. This structure can make the toothed knife 2 complete two complete working cycles with one push and retraction action, thereby reducing unnecessary operations of the output device and achieving the purpose of reducing energy consumption. And the overall structure is relatively light, so the output device can adopt a cylinder (such as Figure 7 shown). The cylinder has the ability to provide power output quickly and stably. In this case, the cutting speed of the toothed knife 2 driven by the cylinder is very fast. For film cutting, the fast cutting speed of the toothed knife 2 is of crucial significance. In this structure, the fast cutting of the toothed knife 2 can complete the cutting action before the film has obvious adverse deformation, thereby effectively preventing the impact on the subsequent film roll, ensuring the efficient progress of the film processing process, and guaranteeing the stability of the product quality.

[0048] Such as Figure 5As shown in the figure, the mounting tool rest 3 includes a fixed tool rest 31 and a movable tool rest 32. The fixed tool rest 31 is fixed inside the roller 1. The movable tool rest 32 moves closer to or away from the fixed tool rest 31. The toothed cutter 2 is clamped between the fixed tool rest 31 and the movable tool rest 32. When the movable tool rest 32 moves closer to the fixed tool rest 31, the toothed cutter 2 is fixed to the mounting tool rest 3. When the movable tool rest 32 moves away from the fixed tool rest 31, the toothed cutter 2 is separated from the mounting tool rest 3. In the present invention, the toothed cutter 2 is clamped between the fixed tool rest 31 and the movable tool rest 32, and the contact surface of the toothed cutter 2 with the two tool rests is not less than one-half of the toothed cutter 2. The larger contact surface can make the toothed cutter 2 be more firmly fixed to the tool rest during work, and can better resist external forces such as cutting resistance and machine vibration during cutting, reduce shaking and displacement, and ensure cutting accuracy and quality. On the other hand, it can also ensure the effective transmission of force between the toothed cutter 2 and the tool rest. When the power drives the toothed cutter 2 to cut, the force is evenly distributed, avoiding damage caused by excessive local stress, extending the service life and reducing the maintenance cost. When the toothed cutter 2 needs to be replaced, first extend the toothed cutter 2 out of the notch, then separate the movable tool rest 32 from the fixed tool rest 31, and then the toothed cutter 2 can be withdrawn from the notch for replacement. This method realizes the detachable installation of the toothed cutter 2, without the need to complexly disassemble the structure of the mounting tool rest 3 or the roller 1, reducing the maintenance cost and difficulty. And it can also quickly replace different specifications or types of toothed cutters 2 according to different film cutting requirements, so as to improve production efficiency and product quality.

[0049] Referring to Figure 3 、 Figure 6 , the movable tool rest 32 includes a movable plate 321, a moving structure 322 and rollers 323. The moving structure 322 is connected to the movable plate 321, and the moving structure 322 drives the movable plate 321 to move closer to or away from the fixed tool rest 31. The moving structure 322 is connected to the fixed tool rest 31. One end of the roller 323 is connected to the arc-shaped guide groove 21. When the movable plate 321 moves closer to the fixed tool rest 31, the roller 323 is inserted into the arc-shaped guide groove 21, and the movable plate 321 and the fixed tool rest 31 clamp the toothed cutter 2. In the present invention, when the movable plate 321 is driven by the moving structure 322 to move closer to the fixed tool rest 31, the other end of the roller 323 will accurately insert into the arc-shaped guide groove 21 of the toothed cutter 2. At this time, the movable plate 321 and the fixed tool rest 31 cooperate with each other to clamp the toothed cutter 2 from both sides. When the equipment does not need to use the toothed cutter 2 or needs to replace the toothed cutter 2, the moving structure 322 operates in the reverse direction, driving the movable plate 321 to move away from the fixed tool rest 31 as Figure 8 shown. As the movable plate 321 moves away, the roller 323 is withdrawn from the vertical opening groove 23, and the toothed cutter 2 is released from the clamped state, realizing the separation of the toothed cutter 2. This operation process is simple and efficient, and due to the close cooperation between the components and the guiding effect of the vertical opening groove 23, the wear between the components can be effectively reduced.

[0050] A vertical opening groove 23 is provided at the lower end of the toothed knife 2. An avoidance groove 3211 is provided on the side of the moving plate 321 close to the fixed tool rest 31. The fixed tool rest 31 includes a connecting seat 311, a fixing plate 312, a fixed slider 313, a moving slide rail 314 and a guide post 315. The fixing plate 312 is arranged on the connecting seat 311. The moving plate 321 is located on the connecting seat 311 and is arranged opposite to the fixing plate 312. The moving structure 322 is connected to the connecting seat 311. A groove is provided on the inner wall of the fixing plate 312 facing the moving plate 321. The fixed slider 313 is fixed in the groove. The moving slide rail 314 is slidably connected to the fixed slider 313. The moving slide rail 314 is fixedly connected to the guide post 315. The guide post 315 passes through the vertical opening groove 23 and extends into the avoidance groove 3211. The driving device 4 is fixedly connected to the connecting seat 311 and its output end is connected to the moving slide rail 314. The driving device 4 drives the moving slide rail 314 to perform reciprocating motion, thereby driving the guide post 315 to move in the arc-shaped guide groove 21. In this structure, the connecting seat 311 serves as a basic component and plays a key role in connecting and supporting other components. The guide post 315 can pass through the vertical opening groove 23 and extend into the avoidance groove 3211. The avoidance groove 3211 provides sufficient space for the movement of the guide post 315, enabling the guide post 315 to drive the toothed knife 2 smoothly when moving, avoiding detachment, and ensuring the stable and reliable operation of the structure. The vertical opening groove 23 can precisely guide the toothed knife 2 in the up and down directions. When the air cylinder drives the toothed knife 2 to move, since the arc-shaped guide groove 21 on the toothed knife 2 is restricted by the roller 323 and will move up and down, the vertical opening groove 23 can limit the unnecessary displacement of the toothed knife in the up and down directions, ensure the stability of the toothed knife in the vertical direction, and further ensure the cutting accuracy and quality. Moreover, its opening penetrates through the lower end of the toothed knife 2, which is also convenient for directly extracting the toothed knife 2 when replacing it. In terms of the pushing method, the slide rail pushing method can withstand multi-directional loads, has good load-bearing capacity and stability, and can achieve high-precision linear motion under high loads; the slider pushing method can achieve a longer stroke and drive the toothed knife 2 more stably.

[0051] Specifically, when the air cylinder drives the moving slide rail 314 to reciprocate, the guide post 315 on the moving slide rail 314 drives the vertical opening groove 23, and then drives the toothed knife 2 to move. Since the arc-shaped guide groove 21 on the toothed knife 2 is restricted by the roller 323, the toothed knife 2 slides up and down while moving left and right to cut the film.

[0052] Furthermore, a fixing hole is provided on the moving slide rail 314. One end of the guide post 315 is fixedly connected to the fixing hole, and the other end is inserted into the vertical opening groove 23. Through the fixing hole, the guide post 315 can be better fixed to avoid detachment and ensure the cutting accuracy of the toothed knife 2.

[0053] Such as Figure 9As shown, the moving structure 322 includes a driving rod 3221, a connecting member 3222, an adjusting gear 3223, and an adjusting block 3224. The driving rod 3221 is connected to the connecting seat 311 through the connecting member 3222. A plurality of adjusting gears 3223 are provided on the driving rod 3221. The driving rod 3221 drives the adjusting gears 3223 to rotate. The adjusting block 3224 is fixedly connected to the moving plate 321. A rack is provided at the lower end of the adjusting block 3224. The adjusting gears 3223 are meshed with the rack. The driving rod 3221 drives the adjusting gears 3223 to rotate, so as to move the adjusting block 3224, and then drive the moving plate 321 to move. The rotation of the adjusting gears 3223 in this structure can be accurately converted into the linear movement of the adjusting block 3224, and then the movement of the moving plate 321 can be precisely controlled. Moreover, the entire moving structure 322 connects the driving rod 3221 and the connecting seat 311 through the connecting member 3222, and the adjusting block 3224 is fixedly connected to the moving plate 321. A stable connection relationship is formed among the components, which helps to maintain the stability of the structure during the movement, reducing shaking or vibration. At the same time, the method of driving the moving plate 321 by meshing the adjusting gears 3223 with the rack at the lower end of the adjusting block 3224 can save space, make the layout of the equipment more reasonable, make the structure more compact and efficient, reduce the intermediate transmission link, and then reduce the overall structure volume and weight, making the structure more lightweight.

[0054] Furthermore, adjusting wrench openings are respectively provided on both sides of the driving rod 3221. The adjusting wrench openings are used to drive the driving rod 3221 to rotate. With the help of the adjusting wrench openings, the operator can directly rotate the driving rod 3221 by using a tool such as a wrench, improving the convenience of the operation, and thus efficiently completing the relevant operations.

[0055] The moving structure 322 further includes a locking member 3225. The driving rod 3221 passes through the locking member 3225. The locking member 3225 is fixedly connected to the connecting seat 311. The locking member 3225 is used to lock and fix the driving rod 3221. The locking member 3225 is provided with a through hole, an adjustment opening and an adjustment screw hole. The driving rod 3221 passes through the through hole. The adjustment opening is arranged on one side of the locking member 3225 and communicates with the through hole. The adjustment screw hole penetrates through the side where the adjustment opening is located. When it is necessary to lock and fix the driving rod 3221, the gap of the opening of the locking member 3225 can be adjusted through the adjustment screw hole. Since the adjustment opening communicates with the through hole, as the adjustment screw hole is adjusted, the through hole will apply a clamping force to the driving rod 3221, thereby realizing the fixation of the driving rod 3221 and effectively preventing it from rotating. In actual application scenarios, in order to prevent the driving rod 3221 from accidentally rotating due to vibration, it may be necessary to firmly fix the driving rod 3221. At this time, the clamping force of the through hole on the driving rod 3221 can be adjusted to the maximum through the adjustment screw hole. During the replacement of the tooth cutter 2 or the daily maintenance stage, when it is necessary to finely adjust the driving rod 3221, the clamping force of the through hole on the driving rod 3221 can be appropriately relaxed to facilitate the operation of the driving rod 3221, and then tightened again after the operation is completed.

[0056] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A coaxial cutting structure for film rewinding and replacing rolls, characterized in that, It includes a roller (1) and a cutting device. A notch is provided on the roller (1), and the cutting device is arranged inside the roller (1) and performs telescopic movement through the notch. The cutting device includes a toothed knife (2), a mounting tool holder (3), and a driving device (4). The mounting tool holder (3) is arranged inside the roller (1). The toothed knife (2) is detachably connected to the mounting tool holder (3) and is located below the notch. The driving device (4) is fixedly connected to the mounting tool holder (3). An arc-shaped guide groove (21) is provided on the toothed knife (2). The mounting tool holder (3) includes a roller (323). The driving device (4) drives the toothed knife (2) to move back and forth. The roller (323) passes through the arc-shaped guide groove (21) and can move inside the arc-shaped guide groove (21). When the roller (323) moves to the lowest end of the arc-shaped guide groove (21), the toothed knife (2) extends out of the notch; when the roller (323) moves to the highest point of the arc-shaped guide groove (21), the toothed knife (2) retracts into the notch.

2. The coaxial cutting structure for film rewinding and replacing rolls according to claim 1, characterized in that, One side of the toothed knife (2) is provided with inclined saw teeth (22), and the inclined saw teeth (22) face the notch.

3. The coaxial cutting structure for film winding and rewinding as described in claim 2, characterized in that The arc-shaped guide groove (21) has two highest points with the same level, and the highest point of the arc-shaped guide groove (21) is close to the side of the inclined saw teeth (22).

4. The coaxial cutting structure for film rewinding and replacing rolls according to claim 1, wherein The mounting tool holder (3) includes a fixed tool holder (31) and a movable tool holder (32). The fixed tool holder (31) is fixed inside the roller (1). The movable tool holder (32) moves closer to or away from the fixed tool holder (31). The toothed knife (2) is clamped between the fixed tool holder (31) and the movable tool holder (32). When the movable tool holder (32) moves closer to the fixed tool holder (31), the toothed knife (2) is fixed to the mounting tool holder (3); when the movable tool holder (32) moves away from the fixed tool holder (31), the toothed knife (2) is separated from the mounting tool holder (3).

5. The coaxial cutting structure for film rewinding and replacing rolls as described in claim 4, characterized in that, The movable tool holder (32) includes a movable plate (321), a moving structure (322), and a roller (323). The moving structure (322) is connected to the movable plate (321), and the moving structure (322) drives the movable plate (321) to move closer to or away from the fixed tool holder (31). The moving structure (322) is connected to the fixed tool holder (31). One end of the roller (323) is connected to the arc-shaped guide groove (21). When the movable plate (321) moves closer to the fixed tool holder (31), the roller (323) is inserted into the arc-shaped guide groove (21), and the movable plate (321) and the fixed tool holder (31) clamp the toothed knife (2).

6. The coaxial cutting structure for film rewinding and replacing rolls as described in claim 5, wherein, A vertical opening groove (23) is provided at the lower end of the toothed knife (2). A clearance groove (3211) is provided on the side of the movable plate (321) close to the fixed tool holder (31). The fixed tool rest (31) includes a connecting seat (311), a fixing plate (312), a fixed slider (313), a moving slide rail (314) and a guide post (315). The fixing plate (312) is arranged on the connecting seat (311). The moving plate (321) is on the connecting seat (311) and is arranged opposite to the fixing plate (312). The moving structure (322) is connected to the connecting seat (311). An inner wall of one side of the fixing plate (312) facing the moving plate (321) is provided with a channel. The fixed slider (313) is fixed in the channel. The moving slide rail (314) is slidably connected to the fixed slider (313). The moving slide rail (314) is fixedly connected to the guide post (315). The guide post (315) passes through the vertical opening groove (23) and extends into the clearance groove (3211). The driving device (4) is fixedly connected to the connecting seat (311) and its output end is connected to the moving slide rail (314). The driving device (4) drives the moving slide rail (314) to make a reciprocating motion, thereby driving the guide post (315) to move in the arc-shaped guide groove (21).

7. The coaxial cutting structure for film rewinding and replacement as described in claim 6, wherein The moving slide rail (314) is provided with a fixing hole. One end of the guide post (315) is fixedly connected to the fixing hole, and the other end is inserted into the vertical opening groove (23).

8. The coaxial cutting structure for film winding replacement according to claim 6, characterized in that, The moving structure (322) includes a driving rod (3221), a connecting member (3222), an adjusting gear (3223) and an adjusting block (3224). The driving rod (3221) is connected to the connecting seat (311) through the connecting member (3222). A plurality of adjusting gears (3223) are arranged on the driving rod (3221). The driving rod (3221) drives the adjusting gears (3223) to rotate. The adjusting block (3224) is fixedly connected to the moving plate (321). A rack is arranged at the lower end of the adjusting block (3224). The adjusting gear (3223) is meshed with the rack. The driving rod (3221) drives the adjusting gear (3223) to rotate, thereby moving the adjusting block (3224), and further driving the moving plate (321) to move.

9. The coaxial cutting structure for film rewinding and replacing rolls according to claim 8, wherein, Adjusting wrench openings are respectively arranged on both sides of the driving rod (3221), and the adjusting wrench openings are used to drive the driving rod (3221) to rotate.

10. A coaxial cutting structure for film rewinding and replacing rolls according to claim 8 or 9, characterized in that, The moving structure (322) further includes a locking member (3225). The driving rod (3221) passes through the locking member (3225). The locking member (3225) is fixedly connected to the connecting seat (311). The locking member (3225) is used to lock and fix the driving rod (3221). The locking member (3225) is provided with a perforation (3225a), an adjustment opening (3225b), and an adjustment screw hole (3225c). The drive rod (3221) passes through the perforation (3225a). The adjustment opening (3225b) is arranged on one side of the locking member (3225) and communicates with the perforation (3225a). The adjustment screw hole (3225c) penetrates through the side where the adjustment opening (3225b) is located.

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