Coaxial cutting structure for winding and changing rolls of thin film

Abstract

The coaxial cutting structure comprises a roller and a cutting device, a notch is formed in the roller, and the cutting device is arranged in the roller and does telescopic motion through the notch; the cutting device comprises a serrated knife, a mounting knife rest and a driving device, the mounting knife rest is arranged in the roller, the serrated knife is detachably connected with the mounting knife rest and located below a notch, the driving device is fixedly connected with the mounting knife rest, an arc-shaped guide groove is formed in the serrated knife, and the driving device is fixedly connected with the mounting knife rest. The output end of the driving device movably moves in the arc-shaped guide groove and drives the serrated knife to slide up and down. Stretching and retracting of the serrated knife are accurately controlled by the driving device, and the serrated knife adopts movable cutting, so that dependence on film tension is effectively reduced. And by means of the telescopic design of the serrated knife, on the premise that the cutting function is guaranteed, excessive auxiliary structures or high-power driving components are not needed, the device structure is more compact and light, the equipment performance can be improved, and the service life can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of tipping paper, and in particular to a coaxial cutting structure for film winding and changing rolls. Background Art

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

[0003] There are main and spare reel shafts on the frame, which can move relative to the friction roller. The main reel shaft reels normally, and the spare reel shaft is used for reel change. When reel change, when the film reaches the set length, the cutter cuts the film into two sections. The front section is continued to be reeled by the original film roll, and the rear section is glued to the new main reel shaft. The cutter now moves horizontally outside the friction roller.

[0004] The machine is usually not stopped during the roll changing process. As the cutter moves along the width of the film and cuts, the film continues to move at high speed. Therefore, the tangent line formed by the cutter on the film is an oblique line, and the part of the film next to the tangent line is a right triangle, which is not conducive to high-priced films that are frequently changed.

[0005] Although the cutter installation structure of the prior patent (CN114147798B) can make the tangent direction of the film be the horizontal direction of the film, it has the following problems: (1) The cutter cuts the film vertically, so there are certain requirements for the tension of the film, and the film has a certain pulling deformation, which has a certain impact on the production of high-quality films; (2) The cutter structure is heavy and requires a large driving force, which makes the overall structure heavy and the roller is prone to overweight during operation; (3) The structure is complex and the cutter is not easy to replace. Summary of the invention

[0006] The object of the present invention is to provide a coaxial cutting structure for film winding and changing rolls, which solves the problems that the above-mentioned film toothed knife structure is heavy, difficult to replace, and has high requirements on film tension during disassembly.

[0007] To achieve the above-mentioned object, the present invention provides a film winding and changing roll coaxial cutting structure, characterized in that it comprises a roller and a cutting device, the roller is provided with a notch, the cutting device is arranged in the roller and performs telescopic movement through the notch; The cutting device comprises a toothed knife, a mounting knife frame and a driving device, wherein the mounting knife frame is arranged in the roller, the toothed knife is detachably connected to the mounting knife frame and is located below the notch, and the driving device is fixedly connected to the mounting knife frame. The toothed cutter is provided with an arc-shaped guide groove, the mounting tool holder includes a roller, the driving device drives the toothed cutter to move back and forth, and the roller passes through the arc-shaped guide groove and can move in the arc-shaped guide groove. When the roller moves to the lowest end of the arc-shaped guide groove, the toothed knife extends out of the slot; when the roller moves to the highest point of the arc-shaped guide groove, the toothed knife retracts into the slot.

[0008] Preferably, one side of the toothed cutter is provided with oblique serrations, and the oblique serrations face the notch.

[0009] Preferably, the arc-shaped guide groove has two highest points at the same level, and the highest point of the arc-shaped guide groove is close to one side of the oblique sawtooth.

[0010] Preferably, the installation tool holder includes a fixed tool holder and a movable tool holder, the fixed tool holder is fixed in the roller, the movable tool holder moves closer to or away from the fixed tool holder, and the toothed knife is clamped between the fixed tool holder and the movable tool holder. When the movable tool holder is close to the fixed tool holder, the toothed knife is fixed to the mounting tool holder; when the movable tool holder is away from the fixed tool holder, the toothed knife is separated from the mounting tool holder.

[0011] Preferably, the movable tool holder comprises a movable plate, a movable structure and a roller, the movable structure is connected to the movable plate, and the movable structure drives the movable plate to move closer to or away from the fixed tool holder, the movable structure is connected to the fixed tool holder, and one end of the roller is connected to the arc-shaped guide groove; When the movable plate approaches the fixed tool holder, the roller is inserted into the arc-shaped guide groove, and the movable plate and the fixed tool holder clamp the toothed knife.

[0012] Preferably, a vertical opening groove is provided at the lower end of the toothed cutter. A side of the movable plate close to the fixed tool holder is provided with an air avoidance groove. The fixed tool holder comprises a connecting seat, a fixed plate, a fixed slider, a movable slide rail and a guide column, the fixed plate is arranged on the connecting seat, the movable plate is on the connecting seat and arranged opposite to the fixed plate, the movable structure is connected to the connecting seat, the inner wall of the fixed plate on one side facing the movable plate is provided with a groove, the fixed slider is fixed in the groove, the movable slide rail is slidably connected to the fixed slider, the movable slide rail is fixedly connected to the guide column, the guide column passes through the vertical opening groove and extends into the avoidance groove, the driving device is fixedly connected to the connecting seat and the output end is connected to the movable slide rail, The driving device drives the movable slide rail to perform reciprocating motion, thereby driving the guide column to move in the arc-shaped guide groove.

[0013] Preferably, a fixing hole is provided on the movable slide rail, one end of the guide column is fixedly connected to the fixing hole, and the other end is inserted into the vertical opening groove.

[0014] Preferably, the moving structure comprises a driving rod, a connecting piece, an adjusting gear and an adjusting block, the driving rod is connected to the connecting seat through the connecting piece, 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 arranged at the lower end of the adjusting block, and the adjusting gear is meshedly connected with the rack; The driving rod drives the adjusting gear to rotate, thereby moving the adjusting block, and further driving the moving plate to move.

[0015] Preferably, adjustment openings are respectively provided on both sides of the driving rod, and the adjustment openings are used to drive the driving rod to rotate.

[0016] Preferably, the moving structure further comprises a locking member, the driving rod passes through the locking member, the locking member is fixedly connected to the connecting seat, and the locking member is used to lock and fix the driving rod. The locking member is provided with a through hole, an adjustment opening and an adjustment screw hole, the driving rod passes through the through hole, the adjustment opening is arranged on one side of the locking member and is connected with the through hole, and the adjustment screw hole passes through the side where the adjustment opening is located. Beneficial effects of the present invention: 1. In the present invention, the output end of the drive device moves in the arc-shaped guide groove to drive the toothed knife to slide up and down to achieve the cutting action. Compared with the traditional puncture cutting, the traditional method is difficult to accurately control the puncture angle and force, and relies on high film tension, which has high requirements for the early film processing and tension control of the winding and changing system, and may also damage the film.

[0017] 2. The telescopic movement of the toothed knife of the present invention is precisely controlled by the driving device, and the toothed knife adopts mobile cutting, so the film can be cut in a relatively stable state, effectively reducing the dependence on the film tension. Moreover, the cutting structure, with the help of the telescopic design of the toothed knife, does not require too many auxiliary structures or high-power driving components while ensuring the cutting function, making the device structure more compact and light, which helps to improve the performance of the equipment and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2It is a cross-sectional schematic diagram of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the toothed cutter of the present invention.

[0022] Figure 4 It is a working principle diagram of the toothed cutter of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the tool holder installed in the present invention.

[0024] Figure 6 It is a cross-sectional schematic diagram of the tool holder installed in the present invention.

[0025] Figure 7 It is a partial schematic diagram of the tool holder installation of the present invention.

[0026] Figure 8 It is a schematic diagram of the process of replacing the toothed cutter of the present invention.

[0027] Fig. 9 yes Figure 5 Enlarged view of point A in the middle.

[0028] In the figure: roller 1; toothed knife 2; arc-shaped guide groove 21; oblique sawtooth 22; vertical opening groove 23; installation tool holder 3; fixed tool holder 31; connecting seat 311; fixed plate 312; fixed slider 313; movable slide rail 314; guide column 315; movable tool holder 32; movable plate 321; air avoidance groove 3211; movable structure 322; driving rod 3221; connecting piece 3222; adjusting gear 3223; adjusting block 3224; through hole 3225a; adjusting opening 3225b; adjusting screw hole 3225c; roller 323; driving device 4. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0030] like Figure 1-Figure 2As shown, a coaxial cutting structure for film winding and changing rolls includes a roller 1 and a cutting device, wherein a notch is provided on the roller 1, and the cutting device is arranged in 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, wherein the mounting knife holder 3 is arranged in the roller 1, the toothed knife 2 is detachably connected to the mounting knife holder 3 and is located below the notch, and 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, and the mounting knife holder 3 includes a roller 323, and the driving device 4 drives the toothed knife 2 to reciprocate, and the roller 323 passes through the arc-shaped guide groove 21 and can move in the arc-shaped guide groove 21, and 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. The drive device 4 of the present invention drives the toothed knife 2 to move, and under the restriction of the arc-shaped guide groove 21 and the roller 323, the toothed knife 2 slides up and down. When the roller 323 moves to the bottom of the arc-shaped guide groove 21, the toothed knife 2 extends out of the notch to 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. Traditional puncture cutting is difficult to accurately control the puncture angle and force, and relies on high film tension, which places strict requirements on the early processing of the film and the tension control of the winding and changing system, and may also cause damage to the film. Different from the traditional puncture cutting method, the extension and retraction of the toothed knife 2 of this structure is precisely controlled by the drive 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. The cutting structure relies on the telescopic design of the toothed knife 2, and under the premise of ensuring the cutting function, there is no need to use more 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.

[0031] like Figure 3As shown, one side of the toothed knife 2 is provided with an oblique sawtooth 22, and the oblique sawtooth 22 faces the notch. The toothed knife 2 in this structure can move left and right with the help of the guide groove, so that the film cutting method is a cutting-type film cutting. The traditional toothed knife 2 adopts a straight up and down movement mode when cutting the film, and its film cutting principle is to puncture the film. However, due to the elasticity and toughness of the film, the straight up and down toothed knife 2 needs to exert a large pressure to puncture the film. This causes the film to be subjected to a large impact force at the moment of film cutting, which can easily cause irregular deformation of the film around the incision, and even tearing in severe cases, which has an adverse effect on the cutting quality. In addition, this puncture-type film cutting requires the film to maintain a high tension, only in this way can the toothed knife 2 more easily puncture the film, which undoubtedly has high requirements for the tension control of the film. The structure of the oblique sawtooth 22 in the present invention changes the point of force of the blade on the film. The angle of inclination of the oblique sawtooth 22 causes the distribution of the force points to change. When the oblique sawtooth 22 contacts the film, multiple inclined surfaces will contact the surface of the film at the same time, and each inclined surface will form a tiny force point. These force points work together to disperse the greater force to an area of ​​the film instead of concentrating it on one point, which helps to prevent excessive deformation or damage to the film during cutting. Secondly, the oblique sawtooth 22 has lower requirements for film tension. Since the oblique sawtooth 22 changes the distribution of the force points, when the film is relatively relaxed, its inclined surface structure can gradually cut into the film like "climbing a slope". When the oblique sawtooth 22 moves left and right in the guide groove, if the film contacts the longer side of the sawtooth, the film will be pulled and cut; when the film contacts the shorter side of the sawtooth, downward pressure will be applied to the film during the downward movement to assist in cutting. In this way, the film cutting force can be dispersed to the longer tangent line of the film, not only can the film cutting operation be performed under lower film tension, but also a neater and smoother incision can be obtained, the film cutting quality is improved, and the damage to the film is less, which is conducive to improving the subsequent use performance of the film. In addition, the toothed knife 2 in this structure adopts this cutting film cutting method, unlike the traditional toothed knife 2 that relies on a large pressure to puncture the film, so the power requirement of the drive device 4 is lower. The lower power requirement helps to simplify the equipment structure and reduce the equipment manufacturing cost. At the same time, it can also optimize the overall structure and make the structure lighter and more compact.

[0032] The arc guide groove 21 has two highest points that are in the same level, and the highest point of the arc guide groove 21 is close to one side of the oblique sawtooth 22. The arc guide groove 21 in the present invention has two highest points. Figure 4As shown, when the output device starts to push the toothed cutter 2, it pushes downward from the first highest point of the arc-shaped guide groove 21 along the guide groove. During this pushing process, the position of the toothed cutter 2 will gradually move from a relatively high position of the arc-shaped guide groove 21 to the lowest point. As the pushing continues, the toothed cutter 2 will gradually extend upward from the lowest point to the slot. When the roller 323 is pushed to the lowest end of the arc-shaped guide groove 21, the toothed cutter 2 reaches its highest point in this stroke; then, when the output device continues to push, its movement direction changes to push from the lowest end of the arc-shaped guide groove 21 to another highest point. During this process, the toothed cutter 2 begins to gradually retract downward into the slot. As the pushing continues, when the roller 323 is pushed to the second highest point, the toothed cutter 2 returns to the lowest point again. In this way, the output device only needs to be pushed once, and the toothed cutter 2 can completely go through such a complete cycle of extension and retraction. And, when the output device retracts, the toothed cutter 2 will completely go through a cycle again according to the same mechanism. This structure can make the toothed cutter 2 complete two complete working cycles by one push and retract action, thereby reducing unnecessary operations of the output device and achieving the purpose of reducing energy consumption. In addition, the structure is relatively light as a whole, so the output device can be a cylinder (such as Figure 7 As 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 vital importance. In this structure, the fast cutting of the toothed knife 2 can complete the cutting action before the film produces obvious adverse deformation, thereby effectively preventing the subsequent film roll from being affected, ensuring the efficient film processing process and the stability of product quality.

[0033] like Figure 5As shown, the installation tool holder 3 includes a fixed tool holder 31 and a movable tool holder 32. The fixed tool holder 31 is fixed in the roller 1. The movable tool holder 32 moves closer to or away from the fixed tool holder 31. The toothed cutter 2 is sandwiched between the fixed tool holder 31 and the movable tool holder 32. When the movable tool holder 32 approaches the fixed tool holder 31, the toothed cutter 2 is fixed to the installation tool holder 3; when the movable tool holder 32 moves away from the fixed tool holder 31, the toothed cutter 2 is separated from the installation tool holder 3. The toothed cutter 2 of the present invention is sandwiched between the fixed tool holder 31 and the movable tool holder 32, and the contact surface between the toothed cutter 2 and the two tool holders is not less than one-half of the toothed cutter 2. The larger contact surface can make the toothed cutter 2 more firmly fixed to the tool holder during operation, 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 that the force is effectively transmitted between the toothed cutter 2 and the tool holder. 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 maintenance costs. When the toothed knife 2 needs to be replaced, the toothed knife 2 is first extended out of the slot, and then the movable knife holder 32 is separated from the fixed knife holder 31, and then the toothed knife 2 can be pulled out of the slot for replacement. This method realizes the detachable installation of the toothed knife 2, without the need for complex disassembly and installation of the knife holder 3 or the roller 1 structure, reducing maintenance costs and difficulties; and different specifications or types of toothed knives 2 can also be quickly replaced according to different film cutting requirements to improve production efficiency and product quality.

[0034] See also Figure 3 , Figure 6 The movable tool holder 32 includes a movable plate 321, a movable structure 322 and a roller 323. The movable structure 322 is connected to the movable plate 321, and the movable structure 322 drives the movable plate 321 to move closer to or away from the fixed tool holder 31. The movable structure 322 is connected to the fixed tool holder 31, and one end of the roller 323 is connected to the arc guide groove 21. When the movable plate 321 approaches the fixed tool holder 31, the roller 323 is inserted into the arc guide groove 21, and the movable plate 321 and the fixed tool holder 31 clamp the toothed cutter 2. In the present invention, when the movable plate 321 approaches the fixed tool holder 31 driven by the movable structure 322, the other end of the roller 323 is accurately inserted into the arc guide groove 21 of the toothed cutter 2. At this time, the movable plate 321 and the fixed tool holder 31 cooperate with each other to clamp the toothed cutter 2 from both sides. When the device 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 to drive the moving plate 321 away from the fixed cutter holder 31. Figure 8 As the moving plate 321 moves away, the roller 323 is pulled out of the vertical opening slot 23, and the toothed cutter 2 is released from the clamped state, thereby realizing the separation of the toothed cutter 2. This operation process is simple and efficient, and due to the close fit between the various components and the guiding effect of the vertical opening slot 23, the wear between the components can be effectively reduced.

[0035] A vertical opening groove 23 is provided at the lower end of the toothed knife 2, and a clearance groove 3211 is provided on one side of the movable plate 321 close to the fixed knife holder 31. The fixed knife holder 31 includes a connecting seat 311, a fixed plate 312, a fixed slider 313, a movable slide rail 314 and a guide column 315. The fixed plate 312 is arranged on the connecting seat 311, and the movable plate 321 is located on the connecting seat 311 and is arranged opposite to the fixed plate 312. The movable structure 322 is connected to the connecting seat 311, and a groove is provided on the inner wall of the fixed plate 312 facing the movable plate 321. The fixed slider 313 is fixed in the groove, and the movable slide rail 314 is slidably connected to the fixed slider 313. The movable slide rail 314 is fixedly connected to the guide column 315. The guide column 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 the output end is connected to the movable slide rail 314. The driving device 4 drives the movable slide rail 314 to make reciprocating motion, thereby driving the guide column 315 to move in the arc guide groove 21. The connecting seat 311 of this structure serves as a basic component and plays a key role in connecting and supporting other components. The guide column 315 can pass through the vertical opening groove 23 and extend into the air avoidance groove 3211. The air avoidance groove 3211 can provide sufficient space for the movement of the guide column 315, so that the guide column 315 can smoothly drive the tooth knife 2 when moving, avoid falling off, and ensure the stable and reliable operation of the structure. The vertical opening groove 23 can accurately guide the tooth knife 2 in the up and down directions. When the cylinder drives the tooth knife 2 to move, the arc guide groove 21 will move up and down due to the restriction of the roller 323, while the vertical opening groove 23 can limit the unnecessary displacement of the tooth knife in the up and down directions, ensure the stability of the tooth knife in the vertical direction, and thus ensure the accuracy and quality of cutting. In addition, its opening is through the lower end of the tooth knife 2, which can also be convenient for directly pulling out the tooth 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, driving the toothed cutter 2 to be more stable.

[0036] Specifically, when the cylinder pushes the movable slide rail 314 to move back and forth, the guide column 315 on the movable slide rail 314 drives the vertical opening groove 23, and then drives the toothed knife 2 to move. Since the arc guide groove 21 on the toothed knife 2 is restricted by the roller 323, the toothed knife 2 can move left and right while sliding up and down to cut the film.

[0037] Further, a fixing hole is provided on the movable 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 slot 23. Through the fixing hole, the guide post 315 can be better fixed to avoid falling off, thereby ensuring the cutting accuracy of the toothed knife 2.

[0038] like Fig. 9As shown, the mobile 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 mobile plate 321. A rack is arranged at the lower end of the adjusting block 3224. The adjusting gear 3223 is meshed and connected with the rack. The driving rod 3221 drives the adjusting gear 3223 to rotate, so that the adjusting block 3224 moves, and then drives the mobile plate 321 to move. The rotation of the adjusting gear 3223 of this structure can be accurately converted into the linear movement of the adjusting block 3224, so as to accurately control the movement of the mobile plate 321. The entire mobile structure 322 connects the driving rod 3221 to the connecting seat 311 through the connecting piece 3222, and the adjusting block 3224 is fixedly connected to the mobile plate 321, so that a stable connection relationship is formed between the various components, which helps to maintain the stability of the structure during the movement and reduce shaking or vibration. At the same time, the method of adjusting the gear 3223 and the rack meshing connection at the lower end of the adjusting block 3224 to drive the mobile plate 321 can save space, make the layout of the equipment more reasonable, make the structure more compact and efficient, reduce the intermediate transmission links, and then reduce the overall structure volume and weight, making the structure more lightweight.

[0039] Furthermore, the driving rod 3221 is provided with adjustment openings on both sides, and the adjustment openings are used to drive the driving rod 3221 to rotate. With the help of the adjustment openings, the operator can use a tool such as a wrench to directly rotate the driving rod 3221, which improves the convenience of operation and efficiently completes the relevant operations.

[0040] The mobile structure 322 also includes a locking member 3225, through which the driving rod 3221 passes, and 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, an adjustment opening and an adjustment screw hole. The driving rod 3221 passes through the perforation, and the adjustment opening is arranged on one side of the locking member 3225 and is connected with the perforation. The adjustment screw hole passes 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 by adjusting the screw hole. Since the adjustment opening is connected with the perforation, as the adjustment screw hole is adjusted, the perforation will apply a clamping force to the driving rod 3221, thereby fixing 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, the driving rod 3221 may need to be firmly fixed. At this time, the clamping force of the perforation on the driving rod 3221 can be adjusted to the maximum by adjusting the screw hole. When the driving rod 3221 needs to be fine-tuned during the replacement of the toothed cutter 2 or daily maintenance, the clamping force of the perforation on the driving rod 3221 can be appropriately loosened to facilitate the operation of the driving rod 3221, and then tightened again after the operation is completed. What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A film reel coaxial cutting structure, characterized in that: It comprises a roller (1) and a cutting device, wherein the roller (1) is provided with a notch, and the cutting device is arranged in the roller (1) and performs telescopic movement through the notch; The cutting device comprises a toothed knife (2), a mounting knife frame (3) and a driving device (4); the mounting knife frame (3) is arranged in the roller (1); the toothed knife (2) and the mounting knife frame (3) are detachably connected and are located below the notch; the driving device (4) is fixedly connected to the mounting knife frame (3); The toothed cutter (2) is provided with an arc-shaped guide groove (21), the mounting cutter frame (3) comprises a roller (323), the driving device (4) drives the toothed cutter (2) to move back and forth, and the roller (323) passes through the arc-shaped guide groove (21) and can move in 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 groove; when the roller (323) moves to the highest point of the arc-shaped guide groove (21), the toothed knife (2) retracts into the groove.

2. A film winding and changing roll coaxial cutting structure as claimed in claim 1, characterized in that: One side of the toothed knife (2) is provided with oblique saw teeth (22), and the oblique saw teeth (22) face the notch.

3. The film reel coaxial cutting structure according to claim 2, characterized in that: The arc-shaped guide groove (21) has two highest points at the same level, and the highest point of the arc-shaped guide groove (21) is close to one side of the oblique sawtooth (22).

4. The film winding and changing roll coaxial cutting structure according to claim 1, characterized in that: The mounting tool holder (3) comprises a fixed tool holder (31) and a movable tool holder (32), wherein the fixed tool holder (31) is fixed in the roller (1), and the movable tool holder (32) moves towards or away from the fixed tool holder (31), and the toothed knife (2) is sandwiched between the fixed tool holder (31) and the movable tool holder (32). When the movable blade holder (32) approaches the fixed blade holder (31), the toothed blade (2) is fixed to the mounting blade holder (3); when the movable blade holder (32) moves away from the fixed blade holder (31), the toothed blade (2) is separated from the mounting blade holder (3).

5. The film winding and changing roll coaxial cutting structure according to claim 4, characterized in that: The movable tool holder (32) comprises a movable plate (321), a movable structure (322) and a roller (323); the movable structure (322) is connected to the movable plate (321), and the movable structure (322) drives the movable plate (321) to move closer to or farther from the fixed tool holder (31); the movable structure (322) is connected to the fixed tool holder (31); and one end of the roller (323) is connected to the arc-shaped guide groove (21); When the movable plate (321) approaches the fixed blade holder (31), the roller (323) is inserted into the arc-shaped guide groove (21), and the movable plate (321) and the fixed blade holder (31) clamp the toothed blade (2).

6. The film reel coaxial cutting structure according to claim 5, characterized in that: The lower end of the toothed cutter (2) is provided with a vertical opening groove (23). A side of the movable plate (321) close to the fixed tool holder (31) is provided with a clearance groove (3211). The fixed tool holder (31) comprises a connecting seat (311), a fixed plate (312), a fixed slide block (313), a movable slide rail (314) and a guide column (315); the fixed plate (312) is arranged on the connecting seat (311); the movable plate (321) is located on the connecting seat (311) and is arranged opposite to the fixed plate (312); the movable structure (322) is connected to the connecting seat (311); a groove is provided on an inner wall of a side of the fixed plate (312) facing the movable plate (321); the fixed slide block (313) is fixed in the groove; the movable slide rail (314) is slidably connected to the fixed slide block (313); the movable slide rail (314) is fixedly connected to the guide column (315); The guide column (315) passes through the vertical opening slot (23) and extends into the clearance slot (3211); the driving device (4) is fixedly connected to the connecting seat (311) and the output end is connected to the movable slide rail (314). The driving device (4) drives the movable slide rail (314) to perform reciprocating motion, thereby driving the guide column (315) to move in the arc-shaped guide groove (21).

7. A film winding and changing roll coaxial cutting structure as claimed in claim 6, characterized in that: The movable slide rail (314) is provided with a fixing hole, one end of the guide column (315) is fixedly connected to the fixing hole, and the other end is inserted into the vertical opening slot (23).

8. The film winding and changing roll coaxial cutting structure according to claim 6, characterized in that: The moving structure (322) comprises a driving rod (3221), a connecting piece (3222), an adjusting gear (3223) and an adjusting block (3224); the driving rod (3221) is connected to the connecting seat (311) via the connecting piece (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); and the adjusting gear (3223) is meshingly connected to the rack; The driving rod (3221) drives the adjusting gear (3223) to rotate, thereby causing the adjusting block (3224) to move, thereby driving the moving plate (321) to move.

9. The film winding and changing roll coaxial cutting structure according to claim 8, characterized in that: Adjustment openings are respectively provided on both sides of the driving rod (3221), and the adjustment openings are used to drive the driving rod (3221) to rotate.

10. A film winding and changing roll coaxial cutting structure as claimed in claim 8 or 9, characterized in that: The moving structure (322) further comprises a locking member (3225), the driving rod (3221) passing through the locking member (3225), the locking member (3225) being fixedly connected to the connecting seat (311), and the locking member (3225) being used to lock and fix the driving rod (3221). The locking member (3225) is provided with a through hole (3225a), an adjustment opening (3225b) and an adjustment screw hole (3225c); the driving rod (3221) passes through the through hole (3225a); the adjustment opening (3225b) is provided on one side of the locking member (3225) and is connected to the through hole (3225a); and the adjustment screw hole (3225c) passes through the side where the adjustment opening (3225b) is located.

Images