A slitting device for film production with a deviation rectifying structure

Abstract

The application discloses a slitting equipment with a deviation rectifying structure for film production, and relates to the technical field of film production. The first roller is used for unwinding the material, and the second roller and the third roller are used for winding the material after slitting, so that the material is conveniently processed subsequently. The fourth roller is used for collecting the waste materials at both ends of the film, so that the waste materials are collected. After the film is slitted through the composite device from the side of the first roller, the material moves to the side of the second roller, the third roller and the fourth roller at corresponding positions, so that the film is continuously slitted, and the whole equipment is operated.

Description

Technical Field

[0001] This invention relates to the field of thin film production technology, specifically to a thin film slitting device with a correction structure. Background Technology

[0002] Film production slitting equipment is a specialized set of equipment for fine cutting of wide finished mother films. It can cut a whole roll of wide substrate into narrow film rolls of a set width according to the specifications required by downstream users. At the same time, it can complete supporting processes such as film feeding correction, tension control, waste collection, leveling and wrinkle removal, ensuring the cutting size accuracy and the quality of the finished film surface, realizing continuous and stable film slitting processing, and adapting to the slitting production needs of various packaging, electronic, optical and other film materials. In the existing technology, during the operation of film production slitting equipment, problems such as film deviation and wrinkles are easily caused by differences in film thickness, material, and static electricity. Secondly, the cutting operation will continuously generate plastic debris, which can easily accumulate on the equipment, increase component wear, and cause scratches on the film. Therefore, a new design has been developed to address these issues. Summary of the Invention

[0003] To address the problems mentioned above, the present invention provides the following technical solution: a slitting device for thin film production with a web-correcting structure, comprising: The work platform has a square block structure and fixed support legs set at the bottom of the square block. A composite device is fixedly connected to the center of the top of the work platform, and a limiting mechanism is fixedly connected to both sides of the top of the composite device. An external support bracket has a curved plate structure. The outer side of the external support bracket is fixedly connected to the outer side of the work platform. A second roller shaft, a third roller shaft, and a fourth roller shaft are fixedly connected to the opposite sides of the external support bracket. A first roller shaft is fixedly connected to the outer side of the work platform away from the external support bracket. The composite device includes: A composite frame has a square plate-like structure, and a frame groove is provided at the center of the outer side of the composite frame. A cutting mechanism is provided inside the frame groove. The second electric push rod is disposed outside the composite frame and is fixedly connected to the outside of the composite frame. A limit plate is fixedly connected to the output end of the second electric push rod.

[0004] The composite device further includes: A mounting plate is installed on top of the composite frame, and the bottom of the mounting plate is fixedly connected to the top of the composite frame. The ring frame has a ring shell structure. The outer side of the ring frame is fixedly connected to the outer side of the mounting plate, and a fan is fixedly connected to the inner side of the ring frame.

[0005] The slitting mechanism includes a slitting roller shaft, with circular plates fixedly connected to both ends of the outer side of the slitting roller shaft. A slitting block is fixedly connected to the center position of the outer side of the slitting roller shaft. Movable blocks are slidably connected to both sides of the outer side of the slitting roller shaft. A screw is fixedly connected to the outer side of the movable block near the circular plate. The screw extends outward through the circular plate and is threaded with a nut.

[0006] A perforated plate is fixedly connected to the top of the work platform, a collection box is fixedly connected to the bottom of the work platform at a position corresponding to the perforated plate, and guide blocks are fixedly connected to both sides of the work platform near the perforated plate.

[0007] A guide plate is fixedly connected to the inner wall of the collection box, and a vacuum feeder is fixedly connected to one side of the outer side of the collection box. A compressed air interface is fixedly connected to the outer side of the vacuum feeder, and the collection box is connected to the vacuum feeder.

[0008] The first roller includes a roller frame, a connecting shaft is rotatably connected inside the roller frame, a first electric push rod is fixedly connected to the opposite side of the connecting shaft, a receiving block is fixedly connected to the output end of the first electric push rod, and a motor is fixedly connected to the outside of the roller frame away from the connecting shaft, and the output end of the motor is fixedly connected to one side of the connecting shaft.

[0009] The limiting mechanism includes a limiting frame, a third electric push rod is fixedly connected to the top of the limiting frame, and a limiting device is fixedly connected to the output end of the third electric push rod.

[0010] The limiting device includes a limiting bracket, with limiting support rods slidably connected to both sides of the limiting bracket. A support block is fixedly connected to one end of the limiting support rod, and a support shaft is fixedly connected to the opposite side of the support block. A roller block is rotatably connected to the outside of the support shaft, and a spring strip is sleeved on the outside of the limiting support rod.

[0011] Connecting blocks are fixedly connected to both sides of the outer side of the support shaft, and angle plates are fixedly connected to the outer side of the connecting blocks.

[0012] This invention provides a slitting device for thin film production with a web-correcting structure. It has the following advantages: I. This film production slitting equipment with a correction structure has a second electric push rod located on both sides of the composite frame. The second electric push rod controls the limiting plate to squeeze from both sides, thereby restricting the material's movement space, preventing material deviation from affecting the subsequent slitting effect, continuously maintaining the film material conveying path in a centered and regular manner, eliminating defects such as wrinkles, uneven slitting width, and uneven finished product winding ends caused by film material deviation. During the film's movement, it comes into contact with the slitting mechanism, which cuts the film, cutting the wide original film into narrow films of the specifications required for downstream production, removing unqualified waste edges on both sides of the film, improving raw material utilization, and achieving continuous and stable fine film material cutting processing.

[0013] II. This film production slitting equipment with a correction structure has two mounting plates, each equipped with two fans. The mounting plates are designed to be positioned correspondingly to support the fans. The fans generate airflow, which washes over the components and materials with appropriate force, promptly removing plastic debris, coating dust, and waste edge impurities generated during cutting. This prevents debris from adhering to the film surface and causing indentations and dirt defects, reduces wear on components due to impurity accumulation, maintains a clean film feeding environment, ensures the appearance quality of the finished film, and reduces the probability of equipment failure.

[0014] III. This film production slitting equipment with a correction structure has circular plates at both ends of the slitting roller shaft. During installation, the slitting roller shaft is inserted from above the groove of the frame to prevent the components from shifting. The movable block slides on the slitting roller shaft, causing the slitting roller shaft to drive the screw to align with the circular plate. The screw passes through the circular plate, and then a nut is threaded onto the screw, causing the movable block to press against the circular plate. The movable block then drives the circular plate to press against the composite frame, thereby clamping and fixing the components. This enables quick installation and disassembly of components. The slitting block is used to slit the film to meet the equipment's operational requirements.

[0015] IV. This film production slitting equipment with a correction structure has roller blocks in contact with the film surface and the top of the working platform. The support block drives the limiting rod to squeeze and shrink the spring strip, thereby playing a role in shock absorption and buffering. It avoids the film from being squeezed and wrinkled or stretched and damaged by rigid pressure. It adaptively matches the bonding gap of film materials of different thicknesses, maintains uniform bonding pressure, counteracts the roller vibration caused by film tension fluctuations, stabilizes the film material conveying state, and helps to ensure the slitting size accuracy and the surface quality of the finished product.

[0016] 5. This film production slitting equipment with a correction structure has symmetrically distributed corner plates on the support shaft, forming a structure that is narrow at the front and wide at the back. During the film feeding and movement process, the film surface is leveled according to the angle of the corner plates, which promotes the film to lay flat and avoids large skew and edge deviation during film feeding. It also straightens the film's travel path, prevents the film from swaying left and right, causing wrinkles and slitting width errors, and ensures that the film is transported smoothly and neatly to the slitting station. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the operating platform structure of the present invention; Figure 2 This is a schematic diagram of the second roller shaft structure of the present invention; Figure 3 This is a schematic diagram of the vacuum feeder structure of the present invention; Figure 4 This is a schematic diagram of the receiving block structure of the present invention; Figure 5 This is a schematic diagram of the limiting plate structure of the present invention; Figure 6 This is a schematic diagram of the roller block structure of the present invention; Figure 7 This is a schematic diagram of the mounting plate structure of the present invention; Figure 8 This is a schematic diagram of the segmented block structure of the present invention.

[0018] In the diagram: 1. Working platform; 2. First roller shaft; 3. External support; 4. Composite device; 5. Limiting mechanism; 6. Second roller shaft; 7. Third roller shaft; 8. Fourth roller shaft; 9. Compressed air interface; 10. Guide block; 11. Mesh plate; 12. Guide plate; 13. Collection box; 14. Vacuum conveyor; 21. Roller shaft frame; 22. Connecting shaft; 23. First electric push rod; 24. Receiving block; 25. Motor; 41. Composite frame; 42. Second electric push rod; 43. Limiting plate; 44. Frame 45. Groove; 46. Mounting plate; 47. Circular frame; 48. Fan; 49. Slitting mechanism; 40. Slitting roller; 41. Circular plate; 42. Slitting block; 43. Movable block; 44. Screw; 45. Nut; 66. Restricting frame; 77. Third electric push rod; 88. Restricting device; 98. Restricting bracket; 10. Restricting support rod; 11. Spring strip; 12. Support block; 13. Support shaft; 14. Roller block; 15. Connecting block; 16. Angle plate. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] First embodiment, such as Figures 1 to 3 As shown, the present invention provides a technical solution: a slitting device for thin film production with a correction structure, comprising: The work platform 1 has a square block structure and fixed support legs set at the bottom of the square block. A composite device 4 is fixedly connected to the center of the top of the work platform 1, and a limiting mechanism 5 is fixedly connected to both sides of the top of the composite device 4. An external support 3 has a curved plate structure. One side of the external support 3 is fixedly connected to the outside of the working platform 1. The opposite sides of the external support 3 are respectively fixedly connected to a second roller 6, a third roller 7, and a fourth roller 8. The outside of the working platform 1 away from the external support 3 is fixedly connected to a first roller 2. The first roller 2 is used for unwinding the material, the second roller 6 and the third roller 7 are used for winding the slit material for subsequent processing, and the fourth roller 8 is used for collecting waste material at both ends of the film, thereby achieving the function of waste collection. After the film is slit by the composite device 4 from the first roller 2 side, the material moves to the corresponding second roller 6, third roller 7, and fourth roller 8 sides, thereby maintaining the continuous slitting of the film by the equipment and realizing the overall operation of the equipment.

[0021] A perforated plate 11 is fixedly connected to the top of the work platform 1, and a collection box 13 is fixedly connected to the bottom of the work platform 1 at a position corresponding to the perforated plate 11. Guide blocks 10 are fixedly connected to both sides of the work platform 1 near the perforated plate 11. The cutting debris falls from the top of the perforated plate 11 into the collection box 13, which collects the debris, preventing it from remaining on the surface of the parts and preventing friction between the debris and the film, thus avoiding wear or scratches on the film. The perforated plate 11 supports the film, and the guide blocks 10 have an oblique cut structure to facilitate film movement, reduce film friction pressure, and prevent damage to the film.

[0022] A guide plate 12 is fixedly connected to the inner wall of the collection box 13, and a vacuum conveyor 14 is fixedly connected to one side of the outer side of the collection box 13. A compressed air interface 9 is fixedly connected to the outer side of the vacuum conveyor 14, and the collection box 13 is connected to the vacuum conveyor 14. The guide plate 12 adopts a structure with higher ends and lower middle, which is used to guide the flow of debris and cause the debris to concentrate in the middle of the guide plate 12, thereby facilitating subsequent cleaning of the debris. An air compressor is connected to the compressed air interface 9. The vacuum conveyor 14 has an inlet on the side near the guide plate 12 and an outlet on the other side. A stable air pressure difference is formed between the inlet and the outside atmosphere. The external airflow carries the plastic debris generated by the cutting into the equipment and sprays the waste to the other side. The outlet of the vacuum conveyor 14 can be connected to a pipe to facilitate the collection of materials.

[0023] The second embodiment is based on the first embodiment; please refer to [link / reference]. Figures 4 to 6 As shown, the first roller shaft 2 includes a roller shaft frame 21, a connecting shaft 22 is rotatably connected inside the roller shaft frame 21, a first electric push rod 23 is fixedly connected to the opposite side of the connecting shaft 22, a receiving block 24 is fixedly connected to the output end of the first electric push rod 23, and a motor 25 is fixedly connected to the outside of the roller shaft frame 21 away from the connecting shaft 22, and the output end of the motor 25 is fixedly connected to one side of the connecting shaft 22. Roller frame bodies 21 are set on both sides of one side of the working platform 1. Both roller frame bodies 21 are equipped with connecting shafts 22. The connecting shafts 22 are equipped with first electric push rods 23. The unwound material and the receiving block 24 are kept in a horizontal position. The first electric push rod 23 controls the receiving block 24 to be inserted from both ends of the unwound material, thereby clamping and fixing the material, thus realizing the quick disassembly and installation of the components. Then, the motor 25 controls the rotation of one side of the connecting shaft 22, thereby making the material roll rotate and supplying the substrate to the slitting station at a uniform speed. With the help of tension control, the tension of the film material is kept stable. At the same time, the first roller 2 is adapted to the second roller 6, the third roller 7 and the fourth roller 8 to provide a continuous and stable supply of raw materials for continuous cutting operations, avoiding slitting defects caused by feeding jams and tension imbalances.

[0024] The limiting mechanism 5 includes a limiting frame 51, with a third electric push rod 52 fixedly connected to the top of the limiting frame 51. A limiting tool 53 is fixedly connected to the output end of the third electric push rod 52. The limiting mechanism 5 is set on both sides of the top of the composite device 4, with one side acting on the feeding and the other side acting on the discharging. The third electric push rod 52 controls the limiting tool 53 to adhere to the film from above, so that the limiting tool 53 controls the film to adhere to the working platform 1, maintain the running path of the film, stabilize the running tension of the film, suppress film shaking and drifting, and avoid film displacement during cutting, which would cause slitting size deviation. At the same time, it flattens the wrinkles on the film surface, removes air between film layers, allows the film to adhere to the cutting tool for flat cutting, and also prevents waste edge rebound from interfering with the material feeding, ensuring slitting accuracy and neat finished product winding end face.

[0025] The limiting device 53 includes a limiting bracket 531. Limiting rods 532 are slidably connected to both sides of the limiting bracket 531. A support block 534 is fixedly connected to one end of each limiting rod 532. A support shaft 535 is fixedly connected to the opposite side of the support block 534. A roller block 536 is rotatably connected to the outside of the support shaft 535. A spring strip 533 is sleeved on the outside of the limiting rod 532. The roller block 536 contacts the film surface and the top of the working platform 1. The support block 534 drives the limiting rod 532 to compress and shrink the spring strip 533, thereby providing shock absorption and buffering. This prevents rigid pressure from causing the film to wrinkle or tear due to compression. It also adaptively matches the bonding gap of film materials of different thicknesses, maintains uniform bonding pressure, counteracts roller vibration caused by film tension fluctuations, stabilizes the film material conveying state, and helps ensure the accuracy of slitting dimensions and the surface quality of the finished product.

[0026] Connecting blocks 537 are fixedly connected to both sides of the support shaft 535, and angle plates 538 are fixedly connected to the outside of the connecting blocks 537. The angle plates 538 are symmetrically distributed on the support shaft 535, forming a structure that is narrow at the front and wide at the back. During the film feeding process and the movement of the film, the film surface is leveled according to the angle of the angle plates 538, which promotes the film to lay flat, avoids large skew and edge deviation during film feeding, straightens the film's travel path, prevents the film material from swaying left and right and causing wrinkles, and reduces the width error of the slitting, ensuring that the film is transported smoothly and neatly to the slitting station.

[0027] The third embodiment is based on embodiments one and two; please refer to [link / reference]. Figures 5 to 8 As shown, the composite device 4 includes: The composite frame 41 has a square plate-shaped structure. A frame groove 44 is provided in the center of the outer side of the composite frame 41, and a cutting mechanism 48 is provided inside the frame groove 44. The second electric push rod 42 is located outside the composite frame 41 and is fixedly connected to the composite frame 41. A limit plate 43 is fixedly connected to the output end of the second electric push rod 42. The second electric push rod 42 is positioned on both sides of the composite frame 41. By controlling the limit plate 43, the limit plate 43 is pressed from both sides, thereby restricting the material's movement space, preventing material deviation from affecting subsequent slitting, and continuously maintaining the film material conveying path in a centered and regular manner. This eliminates defects such as wrinkles, uneven slitting width, and uneven finished product winding ends caused by film material deviation. During film movement, the push rod 42 contacts the slitting mechanism 48, which cuts the wide original film into narrow films of the required specifications for downstream production. Defective waste edges on both sides of the film are removed, improving raw material utilization and achieving continuous and stable fine film material cutting processing.

[0028] The composite device 4 also includes: A mounting plate 45 is provided on the top of the composite frame 41, and the bottom of the mounting plate 45 is fixedly connected to the top of the composite frame 41. The annular frame 46 has an annular shell structure. One side of the annular frame 46 is fixedly connected to the outer side of the mounting plate 45, and a fan 47 is fixedly connected to the inner side of the annular frame 46. Two mounting plates 45 are provided, each with two fans 47, and the mounting plates 45 are designed to be correspondingly positioned. The mounting plates 45 support the fans 47, which generate airflow to wash away plastic debris, coating dust, and waste edge impurities generated during cutting. This prevents debris from adhering to the film surface and causing indentations and dirt defects, reduces wear on components due to impurity accumulation, maintains a clean film feeding environment, ensures the appearance quality of the finished film, and reduces the probability of equipment failure.

[0029] The slitting mechanism 48 includes a slitting roller shaft 481. Circular plates 482 are fixedly connected to both ends of the slitting roller shaft 481. A slitting block 483 is fixedly connected to the center of the slitting roller shaft 481. Movable blocks 484 are slidably connected to both sides of the slitting roller shaft 481. A screw 485 is fixedly connected to the side of the movable block 484 near the circular plate 482. The screw 485 extends outward through the circular plate 482 and is threadedly connected to a nut 486. Circular plates 482 are provided at both ends of the slitting roller shaft 481. During installation, the slitting roller shaft 481 is inserted from above the groove 44 of the frame to prevent the component from shifting. The movable block 484 slides on the slitting roller shaft 481, causing the slitting roller shaft 481 to drive the screw 485 to engage with the circular plate 482. The screw 485 passes through the circular plate 482. Then, the nut 486 is threaded onto the screw 485, causing the movable block 484 to press and adhere to the circular plate 482. The movable block 484 drives the circular plate 482 to press against the composite frame 41, thereby clamping and fixing the component and enabling quick installation and disassembly of the component. The slitting block 483 is used to slit the film to meet the equipment operation requirements.

[0030] In use, the first roller 2, the second roller 6, the third roller 7, and the fourth roller 8 adopt the same structural design. The first roller 2 is used to unwind the material, the second roller 6 and the third roller 7 are used to rewind the slit film, and the fourth roller 8 is used to collect the waste film at both ends of the film to prevent the waste from scattering and to prevent it from affecting the film slitting operation. The first roller 2 is set on one side of the working platform 1, and the second roller 6, the third roller 7 and the fourth roller 8 are set on the other side of the working platform 1. The material is controlled to move to the second roller 6, the third roller 7 and the fourth roller 8 through the first roller 2, and the material is collected through the second roller 6, the third roller 7 and the fourth roller 8 at the same time, thereby completing the film cutting operation. The top of the working platform 1 is equipped with a laminating device 4 and a limiting mechanism 5 is installed on the laminating device 4. The laminating device 4 is equipped with a slitting mechanism 48. When the first roller 2, the second roller 6, the third roller 7, and the fourth roller 8 work together, the tension of the film is kept in contact with the slitting mechanism 48, thereby achieving the slitting operation of the film. During the cutting process, material debris is easily generated. The blower 47 uses appropriate air force to flush the working platform 1 and the material, thereby achieving the function of air cleaning components, reducing debris accumulation, and avoiding affecting the material cutting operation. During film feeding and unfeeding, the limiting mechanism 5 squeezes and contacts the film from above, thereby stabilizing the film's running tension, suppressing film shaking and drifting, and preventing film displacement during cutting, which would cause slitting size deviation. At the same time, it flattens the film surface wrinkles, removes air between film layers, allows the film to adhere to the cutting tool for flat cutting, and also prevents waste edge rebound from interfering with material feeding, ensuring slitting accuracy and neat finished product winding end face.

[0031] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

Claims

1. A slitting device for thin film production with a correction structure, characterized in that, include: The work platform (1) has a square block structure and fixed support legs set at the bottom of the square block. A composite device (4) is fixedly connected to the top center of the work platform (1), and a limiting mechanism (5) is fixedly connected to both sides of the top of the composite device (4). An external support (3) has a curved plate structure. The outer side of the external support (3) is fixedly connected to the outer side of the working platform (1). The opposite sides of the external support (3) are respectively fixedly connected to a second roller (6), a third roller (7) and a fourth roller (8). The outer side of the working platform (1) away from the external support (3) is fixedly connected to a first roller (2). The composite device (4) includes: The composite frame (41) has a square plate structure. A frame groove (44) is provided in the center of the outside of the composite frame (41). A cutting mechanism (48) is provided inside the frame groove (44). The second electric push rod (42) is disposed outside the composite frame (41), and the exterior of the second electric push rod (42) is fixedly connected to the composite frame (41). The output end of the second electric push rod (42) is fixedly connected to a limit plate (43).

2. The slitting equipment for thin film production with a correction structure according to claim 1, characterized in that: The composite device (4) further includes: A mounting plate (45) is provided on the top of the composite frame (41), and the bottom of the mounting plate (45) is fixedly connected to the top of the composite frame (41); The ring frame (46) has a ring shell structure. The outer side of the ring frame (46) is fixedly connected to the outer side of the mounting plate (45), and the inner side of the ring frame (46) is fixedly connected to a fan (47).

3. A slitting device for thin film production with a correction structure according to claim 1, characterized in that: The slitting mechanism (48) includes a slitting roller shaft (481), with circular plates (482) fixedly connected to both ends of the outer side of the slitting roller shaft (481), a slitting block (483) fixedly connected to the center of the outer side of the slitting roller shaft (481), and movable blocks (484) slidably connected to both sides of the outer side of the slitting roller shaft (481). A screw (485) is fixedly connected to the side of the movable block (484) near the circular plate (482), and the screw (485) extends outward through the circular plate (482) and is threaded with a nut (486).

4. A slitting device for thin film production with a correction structure according to claim 1, characterized in that: The top of the work platform (1) is fixedly connected to a perforated plate (11), and the bottom of the work platform (1) is fixedly connected to a collection box (13) at a position corresponding to the perforated plate (11). Guide blocks (10) are fixedly connected to both sides of the work platform (1) near the perforated plate (11).

5. A slitting device for thin film production with a correction structure according to claim 4, characterized in that: A guide plate (12) is fixedly connected to the inner wall of the collection box (13), and a vacuum feeder (14) is fixedly connected to the outer side of the collection box (13). A compressed air interface (9) is fixedly connected to the outer side of the vacuum feeder (14), and the collection box (13) is connected to the vacuum feeder (14).

6. A slitting device for thin film production with a correction structure according to claim 1, characterized in that: The first roller shaft (2) includes a roller shaft frame (21), a connecting shaft (22) is rotatably connected inside the roller shaft frame (21), a first electric push rod (23) is fixedly connected to the opposite side of the connecting shaft (22), a receiving block (24) is fixedly connected to the output end of the first electric push rod (23), and a motor (25) is fixedly connected to the outside of the roller shaft frame (21) away from the connecting shaft (22), and the output end of the motor (25) is fixedly connected to one side of the connecting shaft (22).

7. A slitting device for thin film production with a correction structure according to claim 1, characterized in that: The limiting mechanism (5) includes a limiting frame (51), a third electric push rod (52) is fixedly connected to the top of the limiting frame (51), and a limiting device (53) is fixedly connected to the output end of the third electric push rod (52).

8. A slitting device for thin film production with a correction structure according to claim 7, characterized in that: The limiting device (53) includes a limiting bracket (531), with limiting rods (532) slidably connected to both sides of the limiting bracket (531). A support block (534) is fixedly connected to one end of the limiting rod (532), and a support shaft (535) is fixedly connected to the opposite side of the support block (534). A roller block (536) is rotatably connected to the outside of the support shaft (535), and a spring strip (533) is sleeved on the outside of the limiting rod (532).

9. A slitting device for thin film production with a correction structure according to claim 8, characterized in that: Connecting blocks (537) are fixedly connected to both sides of the outer side of the support shaft (535), and angle plates (538) are fixedly connected to the outer side of the connecting blocks (537).

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