Cloth cutting method and system for medical dressing

Abstract

The invention discloses a medical dressing cloth cutting method and system, and belongs to the technical field of medical dressing production. The system comprises an unwinding device, a cloth winding device, a transfer conveying device and a cloth cutting table, wherein the cloth winding device comprises a cloth winding rack and a roll cutting wheel rotationally arranged on the cloth winding rack. The method comprises the steps that the unwinding device outputs fabric to the cloth winding device, deviation rectifying and length counting are conducted, and when the cloth winding device conducts initial winding, a transverse rod with a fixing rod is located in front of a cutting and winding wheel; the starting end of the fabric is manually fixed to the fixing rod; after rotating one or more circles, the roll cutting wheel stops, the outer perimeter of the fabric roll on the roll cutting wheel is checked according to a length counting result, and the outer perimeter of the fabric roll on the roll cutting wheel is made to reach a preset value by controlling a driving structure; the roll cutting wheel continues to rotate until the preset number of turns is reached; the rear portion of the fabric roll is cut off manually; one end of the fabric is manually pulled backwards to a double-roller conveying structure of the transfer conveying device; and after the fabric part enters the cloth cutting table, the rear overturning frame rotates to be horizontal until the end.

Description

Technical Field

[0001] This invention belongs to the field of medical dressing production technology, and specifically relates to a method and system for cutting medical dressings. Background Technology

[0002] In the large-scale production of garments, face masks, shoe materials, medical dressings, and other items, stacked fabrics are often cut. Currently, two common methods of stacking fabric are: one is to use a fabric cutting machine to cut the fabric multiple times, which is inefficient and time-consuming; the other is to use a windmill-type fabric rolling machine to first wind all the material into a roll, and then cut it from the middle. The second method can be found in the following patent: For example, patent application number CN201920754496.X discloses a fabric spreading machine with an adjustable cutting roller diameter, including a frame, on which a cutting roller is mounted and rotatably mounted. A drive motor for rotating the cutting roller is mounted on the frame, and a cutting shear for cutting fabric is also mounted on the frame. The cutting roller includes a rotating shaft, with mounting plates fixed at both ends. Several spokes are fixed at intervals around the axis of the mounting plates, with the interval between adjacent spokes forming a cutting cavity. The spokes on the mounting plates at both ends of the rotating shaft are parallel and correspond one-to-one. A crossbar is provided between corresponding spokes on two mounting plates, with collars fixed at both ends of the crossbar. The collars are fitted onto the spokes and are slidably mounted on the spokes. A fixing element for securing the collars is also provided on the spokes.

[0003] For example, patent application number CN202011527410.3 discloses a high-efficiency, material-saving windmill-type fabric rolling machine, including a rotating frame, a first drive assembly for driving the rotating frame to rotate, and at least three sets of fabric rolling arms for cooperating with fabric rolling; characterized in that: the longitudinal distance between the fabric rolling end of the fabric rolling arm and the rotation center of the rotating frame is defined as a specific distance; the rotating frame is equipped with an adjustment assembly for adjusting the specific distance corresponding to each set of fabric rolling arms. Each fabric rolling arm includes a transverse fabric rolling shaft and at least one oblique connecting rod; one end of the oblique connecting rod is fixedly or rotatably connected to the fabric rolling shaft, and the other end of the oblique connecting rod is rotatably connected to the rotating frame; the adjustment assembly includes several sets of traction arms; each set of fabric rolling arms has at least one oblique connecting rod corresponding to at least one set of traction arms; the adjustment assembly also includes a second drive assembly for driving each set of traction arms to perform traction; the second drive assembly is mounted on the rotating frame. Multiple sets of the inclined connecting rods located on the same vertical plane constitute a connecting rod unit; at least one connecting rod unit contains an inclined connecting rod that corresponds to a set of traction arms and is provided with a traction groove; the length direction of the traction groove is the same as the length direction of the inclined connecting rod; the traction arm includes a traction wheel adapted to the traction groove and a sliding arm fixedly or rotatably connected to the traction wheel; the sliding arm is slidably connected to the rotating frame; the second drive assembly drives each set of sliding arms to slide.

[0004] Because the roll diameter varies, with the inner layer's circumference significantly shorter than the outer layer's, a large amount of edge material is cut off, resulting in substantial waste and hindering cost reduction. Therefore, the outer diameter of the fabric roll needs to remain constant, while the inner diameter must gradually decrease with each rotation. In existing technology, the inner diameter of the fabric roll cannot decrease automatically; manual operation of the crossbars towards the axis of rotation is required. However, the number of crossbars is large, and the movement of each crossbar is extremely small, typically less than 0.5mm, making operation very difficult. Summary of the Invention

[0005] To address the aforementioned problems, embodiments of the present invention provide a method and system for cutting medical dressings. By using external and internal pull cables in conjunction, the inner diameter of the fabric is automatically adjusted, ensuring that the outer diameter of the fabric roll remains constant, thus facilitating control. Simultaneously, it facilitates the transfer of the cut fabric to the cutting table. The technical solution is as follows: On one hand, embodiments of the present invention provide a fabric cutting system, the system including an unwinding device, a fabric winding device, a transfer conveyor device, and a fabric cutting table 18. The fabric cutting table 18 is arranged in a front-to-back direction, and the unwinding device, fabric winding device, transfer conveyor device, and fabric cutting table 18 are arranged sequentially from front to back. The fabric winding device includes a fabric winding frame 1 and a cutting and winding wheel 20 rotatably mounted on it. The cutting and winding wheel 20 includes a rotating shaft 2 on the fabric winding frame 1 arranged in a left-to-right direction, a fabric winding motor on the fabric winding frame 1 for driving the rotating shaft 2 to rotate, two spoke wheels arranged side by side on the rotating shaft 2, and N crossbars 3 between the two spoke wheels. The spoke wheels include a ring 4, a fixing ring 5, and N spokes 6 between them. The fixing ring 5 is coaxially fixed to the rotating shaft 2. On shaft 2, the circular ring 4 and the fixed ring 5 are coaxially arranged, and multiple spokes 6 are evenly distributed and arranged radially along shaft 2; the spokes 6 of the two spoke wheels are arranged one-to-one, and N crossbars 3 are located on the same circle concentric with shaft 2. The crossbars 3 are arranged in the left-right direction and are located between the corresponding two spokes 6; the spoke 6 is a sliding rod and a sliding seat 7 is slidably mounted on it. The left and right ends of the crossbar 3 are respectively fixed to the sliding seats 7 of the corresponding spokes 6 of the two spoke wheels; the cutting and rolling wheel 20 also includes two driving structures; the two driving structures are respectively used to drive the sliding seats 7 on the two spoke wheels to move toward shaft 2 so that the outer diameter of the fabric roll is always the same. They are located on the left and right sides of shaft 2, respectively, and are located on the inner side of the spoke wheels on the corresponding sides; The drive structure includes an inner slip ring 8, an outer slip ring 9, a drive mechanism, N inner pulleys 10, N outer pulleys 11, N end pulleys 12, N outer cables 13, N inner cables 14, and M synchronous sliding rods 15. The rotating shaft 2 is a hollow structure. The drive mechanism is located inside the rotating shaft 2 and is used to drive the outer slip ring 9 to move left and right. The two drive mechanisms operate synchronously. The inner slip ring 8 and outer slip ring 9 are arranged side by side, located inside the corresponding spoke wheels, and are slidably mounted on the rotating shaft 2, coaxial with the rotating shaft 2. The outer slip ring 9 is located outside the inner slip ring 8. Each spoke 6 is provided with one inner pulley 10, one outer pulley 11, one end pulley 12, one outer cable 13, and one inner cable 14. An end pulley 12 is provided at the end away from the rotating shaft 2; an outer pulley 11 is provided on the outer side of the fixed ring 5 corresponding to each spoke 6, and an inner pulley 10 is provided on the inner side of the fixed ring 5 corresponding to each spoke 6; the outer cable 13 is fixed at the end of the slide block 7 away from the rotating shaft 2, and after passing through the end pulley 12 and the outer pulley 11 in sequence, it passes through the outer slip ring 9 and is fixedly connected to the inner slip ring 8; the inner cable 14 is fixed at the other end of the slide block 7, and after passing through the inner pulley 10, it is fixedly connected to the outer slip ring 9; the synchronous slide rod 15 is arranged in the left and right direction, one end of which is fixed on the outer slip ring 9 of a driving structure, the middle part is slidably disposed on the inner slip ring 8 of a driving structure, and the other end of which is fixed on the inner slip ring 8 of another driving structure.

[0006] Furthermore, one of the crossbars 3 is provided with a fixing rod, which is arranged in the left and right direction and has multiple fixing clips arranged side by side on it. The fixing clips are clamped on the fixing rod and fix the starting end of the fabric 19 to the fixing rod. When fixing the fabric 19, the crossbar 3 with the fixing rod is located in front of the cutting roll 20. At this time, the fixing rod is located on the upper or lower side of the crossbar 3.

[0007] The unwinding device in this embodiment includes an unwinding frame 21, a guide frame 22 on the front side of the unwinding frame 21 that can be adjusted left and right, a front rotating frame 23 hinged to the top of the front side of the guide frame 22, an unwinding roller 24 at the front of the front rotating frame 23, a front cylinder 25 between the lower part of the guide frame 22 and the lower side of the front rotating frame 23, a first traction roller 26 at the rear of the front rotating frame 23, a guide sensor on the unwinding frame 21 for detecting the fabric 19, and a length counting roller 27, a tension adjusting rod 28, a second traction roller 29, a flattening roller 210, and a third traction roller 211 arranged sequentially from front to back on the unwinding frame 21. The front rotating frame 23 is arranged in the front-rear direction and its rear end is hinged to the guide frame 22. The front cylinder 25 is arranged obliquely upward from back to front. The length counting roller 27 is used to count the length of the fabric 19. The unwinding roller 24... A tension controller is provided at the end. The unwinding roller 24, the first traction roller 26, the length counting roller 27, the tension adjusting rod 28, the second traction roller 29, the flattening roller 210, and the third traction roller 211 are all arranged in the left-right direction. The third traction roller 211 is located directly in front of the middle of the front side of the cutting roller 20. The flattening roller 210 is lower than the second traction roller 29 and the third traction roller 211. The tension adjusting rod 28 is a smooth round rod with a diameter of less than 5 mm. It is flexible and is located below and behind the second traction roller 29. The fabric 19 is output from the lower side of the fabric roll on the unwinding roller 28, passes over the upper side of the first traction roller 26, the upper side of the length counting roller 27, the lower side of the tension adjusting rod 28, the upper side of the second traction roller 29, the lower side of the flattening roller 210, and the front side of the third traction roller 211 in sequence, and then obliquely moves backward and upward to the upper part of the cutting roller 20.

[0008] In this embodiment of the invention, the fabric rolling frame 1 includes two box structures arranged side by side, with the box structures arranged in a front-to-back direction; the cutting and rolling wheel 20 is located between the two box structures, with its two ends rotatably mounted on the two box structures; the fabric rolling motor is located in one of the box structures and is connected to the end of the rotating shaft 2 for transmission; the transfer conveying device includes an arc-shaped plate 31, a rear flipping frame 32 hinged to the front side of the cutting table 18, a transfer conveyor belt 33 on the rear flipping frame 32, and a drive belt between the lower side of the rear flipping frame 32 and the front side of the cutting table 18 for driving the rear flipping frame 32 to rotate upward. The horizontal rear cylinder 34, the roller conveyor structure 35 located on the cutting table 18 and adjacent to the front of the cutting table 18, and the transition plate 36 arranged in the front-rear direction; the arc plate 31 is located directly below the cutting roll 20, its upper surface is smooth, it is located between two box structures, it is arranged in the front-rear direction, its rear part is horizontal, its rear end extends to the adjacent front of the front end of the transfer conveyor belt 33, its front part is located in front of and below the cutting roll 20 and it is curved upward, its front end is located below the third traction roller 211; the arc-shaped bend at the front of the arc plate 31 cooperates with the cutting roll 20; the rear flip The rotating frame 32 is arranged diagonally downwards from back to front, with its rear end hinged to the top front side of the cutting table 18. It is located below and behind the cutting roll 20 and can be flipped upwards to a horizontal position. The transfer conveyor belt 33 is arranged along the direction of the rear rotating frame 32. When the rear rotating frame 32 is flipped to a horizontal position, the transfer conveyor belt 33 is flush with the cutting table 18. The rear cylinder 34 is arranged in a front-rear direction, and the rear end of the transfer conveyor belt 33, the transition plate 36, the roller conveyor structure 35, and the cutting table 18 are flush. The upper surface of the transition plate 36 is smooth, and its front end is located at the rear end of the transfer conveyor belt 33. The rear end of the conveyor belt 33 is located adjacent to the front of the roller conveyor structure 35. The conveying speeds of the transfer conveyor belt 33 and the roller conveyor structure 35 are coordinated. The roller conveyor structure 35 includes a pressure roller and a drive roller arranged side by side. Both the pressure roller and the drive roller are arranged in the left-right direction. The pressure roller is a smooth roller, and the drive roller is a rough roller driven by a corresponding motor. The pressure roller can be driven to move up and down by a corresponding cylinder. When transferring the fabric 19, the pressure roller presses against the upper side of the fabric 19. After part of the fabric 19 enters the cutting table 18, the rear flipping frame 32 rotates to the horizontal.

[0009] Furthermore, in this embodiment of the invention, a sliding hole 16 is provided on the rotating shaft 2 and located at the outer slip ring 9. The sliding hole 16 is arranged in the left-right direction. The outer slip ring 9 is connected to the driving mechanism through a connector passing through the sliding hole 16. A double-ended lead screw is rotatably provided inside the rotating shaft 2. The two threaded portions of the double-ended lead screw form two driving mechanisms. A servo motor for driving the double-ended lead screw to rotate is provided on the fabric rolling frame. The double-ended lead screw is coaxially arranged with the rotating shaft 2, and one end of it is connected to the servo motor for transmission. The connectors of the two outer slip rings 9 are respectively threadedly connected to the two threaded portions of the double-ended lead screw. Specifically, in this embodiment of the invention, both the inner slip ring 8 and the outer slip ring 9 include a sliding sleeve and a disc on its circumference. The sliding sleeve and the disc are coaxially arranged with the rotating shaft 2. The sliding sleeve is sleeved on the rotating shaft 2 and slides on the rotating shaft 2. The end of the outer cable 13 or the inner cable 14 is fixed on the disc. The synchronous sliding rod 15 slides or is fixed on the disc. The disc of the outer slip ring 9 is provided with M strip holes 17 for the outer cable 13 to pass through. The M strip holes 17 are evenly distributed and are all arranged radially along the outer slip ring 9. The end of the inner cable 14 is fixed at the end of the corresponding strip hole 17 away from the rotating shaft 2.

[0010] In this embodiment of the invention, N outer pulleys 11 are evenly distributed and located on a circle concentric with the rotating shaft 2; N inner pulleys 10 are evenly distributed and located on a circle concentric with the rotating shaft 2; M synchronous slide rods 15 are evenly distributed and located on a circle concentric with the rotating shaft 2; and the synchronous slide rods 15 of the two drive structures are staggered. The fixing ring 5 includes a fixing disk and a cylinder inside it. The fixing disk is coaxially fixed on the rotating shaft 2, and the cylinder is coaxially arranged with the rotating shaft 2. The inner pulleys 10 are located at the inner end of the cylinder. The spokes 6 are fixed to the inner side of the fixing disk near the rotating shaft 2 and are arranged around the cylinder. The outer pulleys 11 are located on the fixing disk and are located between the rotating shaft 2 and the cylinder.

[0011] In this embodiment of the invention, N is 6-16, M is 2-4, and the distance between the crossbar 3 and the rotating shaft 2 is 1.0-1.5m; for every 2 rotations of the cutting wheel 20, the circumference of the circle formed by the crossbar 3 decreases by 1mm.

[0012] On the other hand, embodiments of the present invention also provide a method for cutting fabric using the aforementioned medical dressing cutting system. The method includes: an unwinding device outputting fabric 19 to a winding device for correction and length counting; during the initial winding of the winding device, a crossbar 3 with a fixed rod is located at the front of the cutting wheel 20; manually fixing the starting end of fabric 19 to the fixed rod; after the cutting wheel 20 rotates one or more times, stopping, and checking the outer circumference of the fabric roll on the cutting wheel 20 based on the length counting result, and controlling the drive structure to bring the outer circumference of the fabric roll on the cutting wheel 20 to a predetermined value; the cutting wheel 20 continues to rotate until a predetermined number of rotations are reached and then stops; manually cutting the rear part of the fabric roll; then manually pulling one end of fabric 19 backward to the roller conveying structure 35 of the transfer conveyor; the transfer conveyor belt 33 and the roller conveying structure 35 synchronously convey fabric 19 backward to the cutting table 18; after part of fabric 19 enters the cutting table 18, the rear flipping frame 32 rotates to a horizontal position to complete the process.

[0013] The fabric winding process of the cutting roll 20 is as follows: The drive structure operates according to the number of rotations of the rotating shaft 2. After the rotating shaft 2 rotates a predetermined number of times, the drive structure drives the outer slip ring 9 to move inward a predetermined distance. The outer slip ring 9 drives the inner slip ring 8 of another drive structure to move outward through the synchronous slide rod 15. Since the two drive structures move synchronously, the two outer slip rings 9 move inward synchronously, and the two inner slip rings 8 move outward synchronously. For one drive structure, the outer slip ring 9 pulls the inner cable 14, and the inner slip ring 8 releases the outer cable 13. Then the slide 7 moves toward the rotating shaft 2, and all slides 7 move synchronously. The diameter of the circle formed by the crossbars 3 decreases, while the outer diameter of the fabric roll on the cutting roll 20 remains unchanged.

[0014] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows: The embodiments of the present invention provide a method and system for cutting medical dressings. The inner diameter of the fabric roll is automatically adjusted by the coordinated pulling of an outer and an inner pull cable, ensuring that the outer diameter of the fabric roll remains constant, thus facilitating control. Specifically, one end of a synchronous slide rod is fixed to an outer slip ring of a driving structure, the middle part slides on an inner slip ring of another driving structure, and the other end is fixed to an inner slip ring of another driving structure. This achieves synchronous and unidirectional movement between the inner slip ring and the outer slip ring of the other driving structure, enabling relative movement between the inner and outer slip rings of the same driving structure. This allows the inner pull cable to pull the slide block, while the outer pull cable releases the slide block. Simultaneously, all slide blocks (2N) move synchronously. Furthermore, this facilitates the transfer of the cut fabric to the cutting table. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the fabric cutting system for medical dressings provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the unwinding device; Figure 3 This is a schematic diagram of the transfer and conveying device when the rear cylinder extends; Figure 4 This is a schematic diagram of the fabric rolling device; Figure 5 This is a schematic diagram of the spoked wheel; Figure 6 This is a schematic diagram of the outer slip ring; Figure 7 This is a schematic diagram of the inner slip ring.

[0016] In the diagram: 1. Fabric rolling frame, 2. Rotary shaft, 3. Crossbar, 4. Ring, 5. Fixing ring, 6. Spoke, 7. Slide block, 8. Inner slip ring, 9. Outer slip ring, 10. Inner pulley, 11. Outer pulley, 12. End pulley, 13. Outer cable, 14. Inner cable, 15. Synchronous slide bar, 16. Sliding hole, 17. Strip hole, 18. Cutting table, 19. Fabric, 20. Cutting roll wheel; 21 Unwinding frame, 22 Straightening frame, 23 Front rotating frame, 24 Unwinding roller, 25 Front cylinder, 26 First traction roller, 27 Length counting roller, 28 Tension adjusting rod, 29 Second traction roller, 210 Flattening roller, 211 Third traction roller; 31. Arc-shaped plate, 32. Rear tilting frame, 33. Transfer conveyor belt, 34. Rear cylinder, 35. Double roller conveyor structure, 36. Transition plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Example 1 See Figure 1-7 Example 1 provides a fabric cutting system for medical dressings. The system includes an unwinding device, a fabric winding device, a transfer conveyor, and a cutting table 18. The cutting table 18 is arranged in a front-to-back direction and its structure is consistent with existing technologies. Specifically, it can be an air-floating cutting table with a machine head that can move back and forth. A cutting device is located at the rear of the machine (or it can be omitted, only laying the fabric without cutting). The unwinding device, fabric winding device, transfer conveyor, and cutting table 18 are arranged sequentially from front to back. The unwinding device is used to output the fabric 19. The fabric winding device is used to wind the fabric into a roll with a constant outer diameter. Cutting the fabric roll forms a stack of fabric 19 (e.g., 100 layers or more) stacked on top of each other. The transfer conveyor is used to transfer the stack of fabric to the cutting table 18.

[0019] Among them, see Figure 1-2The unwinding device includes an unwinding frame 21, a correction frame 22, a front rotating frame 23, an unwinding roller 24, two front cylinders 25 (specifically, two cylinders arranged side-by-side and driven synchronously), a first traction roller 26, a correction sensor (not shown), a length counting roller 27, a tension adjusting rod 28, a second traction roller 29, a flattening roller 210, and a third traction roller 211. The correction frame 22 is located at the front of the unwinding frame 21 and can be adjusted left and right (specifically driven by a servo motor, specifically a lead screw drive structure). It is vertically arranged and has a rectangular frame structure. The front rotating frame 23 is arranged along the front-rear direction, and its rear end is hinged (via a left-right rotating shaft) to the top of the front of the correction frame 22. It also has a rectangular frame structure. The unwinding roller 24 is located at the front of the front rotating frame 23, and its end is equipped with a tension controller (specifically a magnetic powder tension controller). A roll of fabric is wound on it, and it is detachably mounted. The front cylinder 25 is arranged obliquely upwards from back to front, and its hinge (via a left-right rotating shaft) is located between the lower part of the correction frame 22 and the lower side of the front rotating frame 23, and it is in an extended state. The first traction roller 26 is located at the rear of the front rotating frame 23. The correction sensor is located on the unwinding frame 21, which is used to detect the fabric 19 (detecting while correcting, which is the existing structure), and is used to control the left and right adjustment of the correction frame 22. The length counting roller 27, tension adjusting rod 28, second traction roller 29, flattening roller 210 and third traction roller 211 are arranged sequentially from front to back, and they are all located on the unwinding frame 21. The third traction roller 211 can also be located at the front of the fabric winding frame 1. The length counting roller 27 is used to count the length of the fabric 19. The unwinding roller 24, the first traction roller 26, the length counting roller 27, the tension adjusting rod 28, the second traction roller 29, the flattening roller 210, and the third traction roller 211 are all arranged in a left-right direction. The third traction roller 211 is located directly in front of the center of the front side of the cutting roller 20. The flattening roller 210 is lower than the second traction roller 29 and the third traction roller 211. The tension adjusting rod 28 is a smooth round rod with a diameter of less than 5 mm. It is flexible (it can swing slightly up and down). It is located below and behind the second traction roller 29. It is used to ensure the wrapping angle of the fabric 19 on the length counting roller 27 to ensure the accuracy of the length counting. Fabric 19 is output from the lower side of the fabric roll on the unwinding roller 28, passing sequentially over the upper side of the first traction roller 26, the upper side of the length counting roller 27, the lower side of the tension adjusting rod 28, the upper side of the second traction roller 29, the lower side of the flattening roller 210, and the front side of the third traction roller 211, before diagonally upwards and backwards to the upper part of the cutting roller 20. Of course, other correction and length counting methods can also be used in the unwinding device. When the unwinding roller 24 is installed in the unwinding device, the front cylinder 25 retracts, and the front rotating frame 23 is positioned diagonally downwards from back to front to facilitate the installation of the unwinding roller 24 (low installation height). After installation, the front cylinder 25 extends.

[0020] The fabric rolling frame 1 includes two box structures arranged side by side (specifically, they can be composed of multiple rectangular boxes, with openable and closable doors on the outside), and the box structures are arranged in the front-to-back direction. The cutting roller 20 is located between the two box structures, and its two ends (rotating shaft 2) are rotatably mounted on the two box structures. The fabric rolling motor is located in one of the box structures and is connected to the end of the rotating shaft 2 for transmission.

[0021] Among them, see Figure 1 and 3The transfer conveyor includes an arc-shaped plate 31, a rear tilting frame 32, a transfer conveyor belt 33, two rear cylinders 34 (specifically, two cylinders arranged side-by-side and driven synchronously), a roller conveyor structure 35, and a transition plate 36. The arc-shaped plate 31 is located directly below the cutting roll 20, with a smooth upper surface. It is situated on the ground between two box structures, arranged in a front-rear direction, with its rear horizontally positioned. Its rear end extends to the adjacent front of the transfer conveyor belt 33 (which is currently in an inclined state), and its front end is located below and in front of the cutting roll 20, curving upwards. Its front end is located below the third traction roller 211, serving to prevent the cut fabric 19 from falling to the ground. The curved section at the front of the arc-shaped plate 31 engages with the cutting roll 20 (coaxially arranged, with a distance of 20-40 cm between them). The rear tilting frame 32 is arranged diagonally downwards from back to front, with its rear end hinged (via a left-right pivot) at the top front of the cutting table 18, located below and behind the cutting roll 20. It can tilt upwards to a horizontal position. A transfer conveyor belt 33 is mounted on the rear tilting frame 32, arranged along the direction of the rear tilting frame 32. When the rear tilting frame 32 is tilted to a horizontal position, the transfer conveyor belt 33 is flush with the cutting table 18. The upper surface of the transition plate 36 is smooth, and it is arranged horizontally in the front-back direction. It is mounted on the cutting table 18, with its front end adjacent to the rear end of the transfer conveyor belt 33 and its rear end adjacent to the front of the roller conveyor structure 35. It is relatively short (e.g., 3-8 cm) and serves to facilitate the transition between the transfer conveyor belt 33 and the roller conveyor structure 35. The roller conveyor structure 35 is mounted on the cutting table 18, located adjacent to the front of the cutting table 18, and is arranged in a left-right direction. The rear cylinder 34 is arranged in the front-to-back direction and is hinged (through a left-to-right rotating shaft) between the lower side of the rear flipping frame 32 and the front side of the cutting table 18, and is in a retracted state. The rear end of the transfer conveyor belt 33, the transition plate 36, the roller conveyor structure 35, and the cutting table 18 are flush. The conveying speeds of the transfer conveyor belt 33 and the roller conveyor structure 35 are coordinated. The roller conveyor structure 35 includes pressure rollers and drive rollers arranged side by side, both of which are arranged in the left-to-right direction. The pressure rollers are smooth rollers, and the drive rollers are rough-surfaced rollers driven by corresponding motors. The pressure rollers can be driven to move up and down by corresponding cylinders. When transferring fabric 19 (which is a multi-layered fabric stacked on top of each other), the pressure rollers press against the upper side of the fabric 19. After the fabric 19 enters the cutting table 18, the rear flipping frame 32 rotates to the horizontal position; it has at least two functions: 1. to ensure the conveying effect of the roller conveyor structure 35, and 2. to prevent the other end of the fabric 19 from falling onto the arc plate 31 (to prevent the stacked fabric 19 from spreading out).

[0022] Among them, see Figure 4-7The fabric winding device includes a fabric winding frame 1 and a cutting wheel 20 rotatably mounted on it. The cutting wheel 20 is arranged in a left-right direction and includes a rotating shaft 2, a fabric winding motor, two spoked wheels, two drive mechanisms, and N crossbars 3. The rotating shaft 2 is arranged in a left-right direction, with its left and right ends rotatably mounted on the fabric winding frame 1; it is a hollow structure. The fabric winding motor is located on the fabric winding frame 1 (specifically within a box structure) and drives the rotating shaft 2 to rotate; it is connected to one end of the rotating shaft 2 via a transmission connection. The two spoked wheels are arranged side-by-side, coaxially mounted on the rotating shaft 2, located on the left and right sides of the shaft 2, respectively. The N crossbars 3 are located between the two spoked wheels, on the same circle concentric with the rotating shaft 2. N is 6-16.

[0023] Among them, see Figure 4-7 The spoked wheel includes a ring 4, a fixed ring 5, and N spokes 6 between them. The fixed ring 5 is coaxially fixed on the rotating shaft 2. The ring 4 is coaxial with the fixed ring 5 and is coplanar with it. The multiple spokes 6 are evenly distributed and arranged radially along the rotating shaft 2. The spokes 6 of the two spoked wheels are arranged in a one-to-one correspondence. The spoke 6 is a sliding rod, on which a sliding seat 7 is slidably mounted, which is specifically a smooth round rod. The crossbar 3 is arranged in the left-right direction, between the corresponding two spokes 6, and its left and right ends are respectively fixed to the sliding seats 7 (specifically the inner side of the sliding seats 7) on the corresponding spokes 6 of the two spoked wheels. The distance between the crossbar 3 and the rotating shaft 2 is 1.0-1.5m.

[0024] Among them, see Figure 4-7 Two drive structures are used to drive the slides 7 on the two spoke wheels to move toward the shaft 2 so that the outer diameter of the fabric roll is always the same. They are located on the left and right sides of the shaft 2, respectively, and they (mainly referring to the inner pulley 10 and the outer pulley 11) are located on the inner side of the spoke wheels on the corresponding sides.

[0025] Among them, see Figure 4-7 The drive structure includes an inner slip ring 8, an outer slip ring 9, a drive mechanism, N inner pulleys 10, N outer pulleys 11, N end pulleys 12, N outer cables 13, N inner cables 14, and M synchronous sliding rods 15, etc. M is 2-4.

[0026] The drive mechanism is located within the rotating shaft 2 and drives the outer slip ring 9 to move left and right. The two drive mechanisms operate synchronously, causing the two outer slip rings 9 to move towards or away from each other. Specifically, the rotating shaft 2 has a sliding hole 16 located at the outer slip ring 9, with the sliding hole 16 arranged in the left-right direction. The outer slip ring 9 is connected to the drive mechanism via a connector passing through the sliding hole 16. Specifically, the outer slip ring 9 has two sliding holes 16, arranged opposite each other. Specifically, the two drive mechanisms can be implemented by two synchronously operating servo motors. The drive mechanism includes a servo motor and a lead screw, both located within the rotating shaft 2. The lead screw is arranged in the left-right direction and threadedly connected to the connector, and is driven by the servo motor. Alternatively, the two drive mechanisms can be the two ends of the same lead screw (with opposite thread directions), driven by a single servo motor. In this case, a double-ended lead screw is rotatably installed within the rotating shaft 2. The two threaded portions of the double-ended lead screw form two drive mechanisms. A servo motor for driving the rotation of the double-ended lead screw is installed on the fabric winding frame (within the box structure). The double-ended lead screw is coaxially arranged with the rotating shaft 2, and one end of it is connected to the servo motor for transmission. The connecting parts of the two outer slip rings 9 are respectively threadedly connected to the two threaded portions of the double-ended lead screw.

[0027] Among them, see Figure 4-7 The inner slip ring 8 and outer slip ring 9 are arranged side by side, located inside the corresponding spoke wheels, and slidably mounted on the rotating shaft 2, coaxially with the rotating shaft 2. Both inner slip rings 8 and two outer slip rings 9 are located between the two spoke wheels. The outer slip ring 9 is located outside the inner slip ring 8. The inner slip ring 8 and outer slip ring 9 of the left-side drive structure are located inside the left-side spoke wheel, and the inner slip ring 8 and outer slip ring 9 of the right-side drive structure are located inside the right-side spoke wheel. Specifically, both the inner slip ring 8 and outer slip ring 9 include a sliding sleeve and a disc on its circumference, both of which are coaxially mounted with the rotating shaft 2. The sliding sleeve is fitted onto the rotating shaft 2 and slidably mounted on it; it is specifically a plastic cylinder. The disc is specifically a metal disc.

[0028] Among them, see Figure 4-7 Each spoke 6 is equipped with an inner pulley 10, an outer pulley 11, an end pulley 12, an outer cable 13, and an inner cable 14. An end pulley 12 (perpendicular to the corresponding outer cable 13) is located at the end of the spoke 6 furthest from the pivot 2. An outer pulley 11 (perpendicular to the corresponding outer cable 13) is located on the outer side of the fixing ring 5 corresponding to each spoke 6, and an inner pulley 10 (perpendicular to the corresponding inner cable 14) is located on the inner side of the fixing ring 5 corresponding to each spoke 6. N outer pulleys 11 are evenly distributed and located on a circle concentric with the pivot 2, and N inner pulleys 10 are evenly distributed and located on a circle concentric with the pivot 2.

[0029] Among them, see Figure 4-7The outer cable 13 is fixed to the end of the slide block 7 away from the rotating shaft 2. It first runs along the direction of the spokes 6 (located inside the spokes 6) to the corresponding end pulley 12, then around the end pulley 12; next, it runs along the direction of the spokes 6 (located outside the spokes 6) to the corresponding outer pulley 11, then around the outer pulley 11; finally, it runs along the direction of the rotating shaft 2 (inclined away from the rotating shaft 2), passes through the outer slip ring 9 (specifically, the strip-shaped hole 17), and is fixedly connected to the inner slip ring 8 (specifically, the disc). The inner cable 14 is fixed to the other end of the slide block 7 (the end closest to the rotating shaft 2). It first runs along the direction of the spokes 6 (located inside the spokes 6) to the corresponding inner pulley 10, then around the inner pulley 10; then, it runs along the direction of the rotating shaft 2 (inclined away from the rotating shaft 2), and finally is fixedly connected to the outer slip ring 9.

[0030] Specifically, see Figure 4-7 The outer slip ring 9 has M slotted holes 17 on its disc for the outer cable 13 to pass through. The M slotted holes 17 are evenly distributed and arranged radially along the outer slip ring 9. The end of the outer cable 13 or the inner cable 14 is fixed to the disc. Specifically, the end of the inner cable 14 is fixed at the end of the corresponding slotted hole 17 away from the rotating shaft 2.

[0031] Among them, see Figure 4-7 The synchronous slide rods 15 are arranged in the left-right direction and are specifically smooth round rods. One end (outer end) is fixed to the outer slip ring 9 of a drive structure (corresponding drive structure), the middle part slides on the inner slip ring 8 of a drive structure (corresponding drive structure, which has a sliding sleeve along the left-right direction), and the other end (inner end) is fixed to the inner slip ring 8 of another drive structure. M synchronous slide rods 15 are evenly distributed and located on a circle concentric with the rotating shaft 2, and the synchronous slide rods 15 of the two drive structures are staggered. The synchronous slide rods 15 slide or are fixed on the disc.

[0032] Among them, see Figure 4-7 In this embodiment of the invention, the fixing ring 5 includes a fixing disc and an inner cylinder, etc. The fixing disc is coaxially fixed on the rotating shaft 2. The cylinder is coaxially arranged with the rotating shaft 2 and there is a gap between the fixing disc and the cylinder. The inner pulley 10 is located at the inner end of the cylinder. One end of the spoke 6 near the rotating shaft 2 is fixed to the inner side of the fixing disc and is arranged around the cylinder. The outer pulley 11 is located on the fixing disc and is located between the rotating shaft 2 and the cylinder. The outer cable 13 and the inner cable 14 pass inward through the cylinder.

[0033] The circumference of the circle formed by the crossbar 3 decreases by 1mm for every 2-4 rotations of the cutting wheel (specifically 2 rotations). This can be set as needed and is not a limitation of this patent.

[0034] Furthermore, in this embodiment of the invention, a fixing rod (specifically a square rod) is provided on one of the crossbars 3 and on the side where the non-woven fabric is wound. The fixing rod is arranged in a left-right direction and has multiple (3-6) fixing clips arranged side by side on it. The fixing clips are clamped on the fixing rod and fix the starting end of the fabric 19 to the fixing rod. When fixing the fabric 19, the crossbar 3 with the fixing rod is located in front of the cutting roll 20. At this time, the fixing rod is located on the upper or lower side of the crossbar 3.

[0035] Example 2 Example 2 provides a fabric cutting system for medical dressings, the structure of which is basically the same as that of Example 1, except that: in this example, the spoke 6 has an enlarged portion at the end away from the rotating shaft 2, and a through hole is provided on the upper edge of the enlarged portion in the left and right directions. The end pulley 12 is located in the through hole, and the outer cable 13 passes outward through the through hole. The ring 4 is fixedly connected to the end of the enlarged portion away from the rotating shaft 2.

[0036] Example 3 See Figure 6-7 Example 3 provides a medical dressing cutting system, the structure of which is basically the same as that of Example 1, except that N is 12 and M is 3 in this example.

[0037] Example 4 Example 4 provides a fabric cutting system for medical dressings, the structure of which is basically the same as that of Example 1, except that: in this example, fabric 19 is gauze, and different weight gauze can be produced using different setting parameters, such as... Figure 1 As shown. The distance between the crossbar 3 and the rotating shaft 2 is 1.0-1.5m. For every 2 rotations of the cutting roll 20, the circumference of the circle formed by the crossbar 3 decreases by 1mm. The outer circumference of the fabric roll is 6-10m, and the number of rotations is 80-200.

[0038] Table 1 .

[0039] Taking setting number 1 as an example, the cut length of the gauze is 9071mm and the number of layers is 175. The top and bottom layers of gauze are measured and the difference is found to be less than 5mm and both are around 9071mm, which meets the accuracy requirements.

[0040] Example 5 See Figure 1-7Example 5 provides a fabric cutting method using the medical dressing cutting system disclosed in Example 1. The method includes: an unwinding device outputting fabric 19 to a winding device for correction and length counting; during initial winding of the winding device, a crossbar 3 with a fixing rod is located at the front of the cutting roller 20; the starting end of fabric 19 is manually fixed to the fixing rod; the cutting roller 20 rotates one or more times (usually less than 5 times) and then stops; the outer circumference of the fabric roll on the cutting roller 20 is checked based on the length counting result; the outer circumference of the fabric roll on the cutting roller 20 is adjusted to a predetermined value (e.g., 9000 mm) by controlling the drive structure; the cutting roller 20 continues to rotate until the predetermined number of rotations is reached and then stops; the rear part of the fabric roll is manually cut off (specifically by using an electric circular saw); then one end of fabric 19 (usually the end below the cut position) is manually pulled backward to the roller conveying structure 35 of the transfer conveying device. The transfer conveyor belt 33 and the roller conveyor structure 35 move synchronously to transport the fabric 19 (formed by a large number of fabric layers) backward to the cutting table 18; after the fabric 19 partially enters the cutting table 18, the rear flipping frame 32 rotates to the horizontal position until the end.

[0041] The fabric winding process of the cutting roll 20 is as follows: The drive structure operates according to the number of rotations of the rotating shaft 2. After the rotating shaft 2 rotates a predetermined number of times (e.g., two rotations), the drive structure drives the outer slip ring 9 to move inward a predetermined distance. The outer slip ring 9 drives the inner slip ring 8 of another drive structure to move outward through the synchronous slide rod 15. Since the two drive structures move synchronously, the two outer slip rings 9 move inward synchronously, and the two inner slip rings 8 move outward synchronously. For one drive structure, the outer slip ring 9 pulls the inner cable 14, and the inner slip ring 8 releases the outer cable 13, so the slide 7 moves towards the rotating shaft 2, and all slides 7 move synchronously; the diameter of the circle formed by the crossbar 3 decreases (specifically, the crossbar 3 moves inward by 1 mm), while the outer diameter of the fabric roll on the cutting roll 20 remains unchanged.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fabric cutting system for medical dressings, comprising an unwinding device, a fabric winding device, a transfer conveying device, and a cutting table (18), wherein the cutting table (18) is arranged in a front-to-back direction, and the unwinding device, the fabric winding device, the transfer conveying device, and the cutting table (18) are arranged sequentially from front to back; the fabric winding device comprises a fabric winding frame (1) and a cutting and winding wheel (20) rotatably mounted thereon, wherein the cutting and winding wheel (20) comprises a rotating shaft (2) on the fabric winding frame (1) and arranged in a left-to-right direction, a fabric winding motor on the fabric winding frame (1) for driving the rotating shaft (2) to rotate, and a pair of left-to-right parallel arranged on the rotating shaft (2). The two spoked wheels and N crossbars (3) between the two spoked wheels, the spoked wheels including a ring (4), a fixed ring (5) and N spokes (6) between them, the fixed ring (5) is coaxially fixed on the rotating shaft (2), the ring (4) and the fixed ring (5) are coaxially arranged, the multiple spokes (6) are evenly distributed and arranged radially along the rotating shaft (2); the spokes (6) of the two spoked wheels are arranged one-to-one, the N crossbars (3) are located on the same circle concentric with the rotating shaft (2), the crossbars (3) are arranged in the left-right direction and are located between the corresponding two spokes (6); the characteristic is that, The spoke (6) is a slide bar and a slide seat (7) is slidably mounted on it. The left and right ends of the crossbar (3) are respectively fixed on the slide seats (7) of the corresponding spokes (6) of the two spoke wheels. The cutting wheel (20) also includes two driving structures. The two driving structures are used to drive the slide seats (7) on the two spoke wheels to move toward the shaft (2) so that the outer diameter of the fabric roll is always the same. They are located on the left and right sides of the shaft (2) respectively, and are located on the inner side of the spoke wheels on the corresponding side. The drive structure includes an inner slip ring (8), an outer slip ring (9), a drive mechanism, N inner pulleys (10), N outer pulleys (11), N end pulleys (12), N outer cables (13), N inner cables (14), and M synchronous slide rods (15). The rotating shaft (2) is a hollow structure. The drive mechanism is located inside the rotating shaft (2) and is used to drive the outer slip ring (9) to move left and right. The two drive mechanisms move synchronously. The inner slip ring (8) and the outer slip ring (9) are arranged side by side on the left and right sides. They are located inside the corresponding spoke wheels and slide on the rotating shaft (2). They are coaxial with the rotating shaft (2). The outer slip ring (9) is located outside the inner slip ring (8). Each spoke (6) is provided with one inner pulley (10), one outer pulley (11), one end pulley (12), one outer cable (13), and one inner cable (14). (6) An end pulley (12) is provided at the end away from the rotating shaft (2); an outer pulley (11) is provided on the outer side of the fixed ring (5) corresponding to each spoke (6), and an inner pulley (10) is provided on the inner side of the fixed ring (5) corresponding to each spoke (6); the outer cable (13) is fixed at the end of the slide block (7) away from the rotating shaft (2), and after passing through the end pulley (12) and the outer pulley (11) in sequence, it passes through the outer slip ring (9) and is fixedly connected to the inner slip ring (8); the inner cable (14) is fixed at the other end of the slide block (7), and after passing through the inner pulley (10), it is fixedly connected to the outer slip ring (9); the synchronous slide rod (15) is arranged in the left and right direction, one end of which is fixed on the outer slip ring (9) of a driving structure, the middle part is slidably arranged on the inner slip ring (8) of a driving structure, and the other end of which is fixed on the inner slip ring (8) of another driving structure.

2. The fabric cutting system for medical dressings according to claim 1, characterized in that, One of the crossbars (3) is provided with a fixing rod. The fixing rod is arranged in the left and right direction and has multiple fixing clips arranged side by side on it. The fixing clips are clamped on the fixing rod and fix the starting end of the fabric (19) on the fixing rod. When fixing the fabric (19), the crossbar (3) with the fixing rod is located in front of the cutting roll (20). At this time, the fixing rod is located on the upper or lower side of the crossbar (3).

3. The fabric cutting system for medical dressings according to claim 1, characterized in that, The unwinding device includes an unwinding frame (21), a guide frame (22) on the front side of the unwinding frame (21) that can be adjusted left and right, a front rotating frame (23) hinged to the top of the front side of the guide frame (22), an unwinding roller (24) at the front of the front rotating frame (23), a front cylinder (25) between the lower part of the guide frame (22) and the lower side of the front rotating frame (23), a first traction roller (26) at the rear of the front rotating frame (23), and a device on the unwinding frame (21) for detecting the fabric (19). The length counting roller (27), tension adjusting rod (28), second traction roller (29), flattening roller (210), and third traction roller (211) are arranged sequentially from front to back on the correction sensor and unwinding frame (21). The front rotating frame (23) is arranged in the front-rear direction and its rear end is hinged to the correction frame (22). The front cylinder (25) is arranged obliquely upward from back to front. The length counting roller (27) is used to count the length of the fabric (19). The end of the unwinding roller (24) A tension controller is provided. The unwinding roller (24), the first traction roller (26), the length counting roller (27), the tension adjusting rod (28), the second traction roller (29), the flattening roller (210), and the third traction roller (211) are all arranged in the left-right direction. The third traction roller (211) is located directly in front of the center of the front side of the cutting roller (20). The flattening roller (210) is lower than the second traction roller (29) and the third traction roller (211). The tension adjusting rod (28) has a diameter of A smooth, round rod less than 5 mm in diameter, which is flexible, is located below and behind the second traction roller (29); the fabric (19) is output from the lower side of the fabric roll on the unwinding roller (28), passing in sequence over the upper side of the first traction roller (26), the upper side of the length counting roller (27), the lower side of the tension adjusting rod (28), the upper side of the second traction roller (29), the lower side of the flattening roller (210), and the front side of the third traction roller (211), and then obliquely upwards and backwards to the upper part of the cutting roller (20).

4. The fabric cutting system for medical dressings according to claim 3, characterized in that, The fabric rolling frame (1) includes two box structures arranged side by side on the left and right sides, and the box structures are arranged in the front and back direction; the cutting and rolling wheel (20) is located between the two box structures, and its two ends are rotatably mounted on the two box structures; the fabric rolling motor is located in one of the box structures and is connected to the end of the rotating shaft (2) for transmission. The transfer conveyor includes an arc-shaped plate (31), a rear tilting frame (32) hinged to the front side of the cutting table (18), a transfer conveyor belt (33) on the rear tilting frame (32), a rear cylinder (34) between the lower side of the rear tilting frame (32) and the front side of the cutting table (18) for driving the rear tilting frame (32) to rotate upward to the horizontal, a roller conveyor structure (35) on the cutting table (18) and located adjacent to the front of the cutting table (18), and a transition plate (36) arranged in the front-rear direction; the arc-shaped plate (31) is located directly below the cutting roll (20), and its upper surface The surface is smooth, and it is located between two box structures. It is arranged in the front-to-back direction, with its rear horizontally positioned. Its rear end extends to the adjacent front of the front end of the transfer conveyor belt (33), and its front end is located below the front of the cutting roll (20) and is curved upwards. Its front end is located below the third traction roller (211). The curved bending part of the front of the arc plate (31) cooperates with the cutting roll (20). The rear flipping frame (32) is arranged obliquely downwards from back to front, and its rear end is hinged to the top of the front side of the cutting table (18). It is located below the rear of the cutting roll (20) and can be flipped upwards to the water. The transfer conveyor belt (33) is arranged along the direction of the rear tilting frame (32), and when the rear tilting frame (32) is tilted to the horizontal position, the transfer conveyor belt (33) is flush with the cutting table (18); the rear cylinder (34) is arranged in the front-rear direction, and the rear end of the transfer conveyor belt (33), the transition plate (36), the roller conveyor structure (35), and the cutting table (18) are flush; the upper surface of the transition plate (36) is smooth, its front end is located adjacent to the rear end of the transfer conveyor belt (33), and its rear end is located adjacent to the front end of the roller conveyor structure (35). The conveying speeds of the transfer conveyor belt (33) and the roller conveyor structure (35) are coordinated; the roller conveyor structure (35) includes a pressure roller and a drive roller arranged side by side, both the pressure roller and the drive roller are arranged in the left and right direction, the pressure roller is a smooth roller, the drive roller is a rough roller and is driven by a corresponding motor, and the pressure roller can be driven up and down by a corresponding cylinder; when transferring the fabric (19), the pressure roller presses against the upper side of the fabric (19); after the fabric (19) enters the cutting table (18), the rear flipping frame (32) rotates to the horizontal.

5. The fabric cutting system for medical dressings according to claim 1, characterized in that, A sliding hole (16) is provided on the rotating shaft (2) and located at the outer slip ring (9). The sliding hole (16) is arranged in the left-right direction. The outer slip ring (9) is connected to the drive mechanism through a connector passing through the sliding hole (16). A double-ended lead screw is rotatably provided inside the rotating shaft (2). The two threaded parts of the double-ended lead screw form two drive mechanisms. A servo motor for driving the double-ended lead screw to rotate is provided on the fabric rolling frame. The double-ended lead screw is coaxially arranged with the rotating shaft (2), and one end of it is connected to the servo motor for transmission. The connectors of the two outer slip rings (9) are respectively threaded to the two threaded parts of the double-ended lead screw.

6. The fabric cutting system for medical dressings according to claim 1, characterized in that, Both the inner slip ring (8) and the outer slip ring (9) include a sliding sleeve and a disc on its circumference. The sliding sleeve and the disc are coaxially arranged with the rotating shaft (2). The sliding sleeve is sleeved on the rotating shaft (2) and slides on the rotating shaft (2). The end of the outer cable (13) or the inner cable (14) is fixed on the disc. The synchronous slide rod (15) slides or is fixed on the disc. The disc of the outer slip ring (9) is provided with M strip holes (17) for the outer cable (13) to pass through. The M strip holes (17) are evenly distributed and are all arranged radially along the outer slip ring (9). The end of the inner cable (14) is fixed at the end of the corresponding strip hole (17) away from the rotating shaft (2).

7. The fabric cutting system for medical dressings according to claim 6, characterized in that, N outer pulleys (11) are evenly distributed and located on a circle concentric with the rotating shaft (2), N inner pulleys (10) are evenly distributed and located on a circle concentric with the rotating shaft (2), M synchronous slide rods (15) are evenly distributed and located on a circle concentric with the rotating shaft (2), and the synchronous slide rods (15) of the two drive structures are staggered; the fixed ring (5) includes a fixed disk and a cylinder on its inner side, the fixed disk is coaxially fixed on the rotating shaft (2), the cylinder is coaxially arranged with the rotating shaft (2), the inner pulleys (10) are located at the inner end of the cylinder, the spokes (6) are fixed at one end near the rotating shaft (2) on the inner side of the fixed disk and are arranged around the cylinder, and the outer pulleys (11) are located on the fixed disk and are located between the rotating shaft (2) and the cylinder.

8. The fabric cutting system for medical dressings according to claim 1, characterized in that, N is 6-16, M is 2-4, and the distance between the crossbar (3) and the rotating shaft (2) is 1.0-1.5m; for every 2 rotations of the cutting wheel (20), the circumference of the circle formed by the crossbar (3) is 1mm smaller.

9. A fabric cutting method using the fabric cutting system for medical dressings as described in claim 1, characterized in that, The method includes: The unwinding device outputs the fabric (19) to the winding device and corrects its deviation and counts its length. When the winding device initially winds the fabric, the crossbar (3) with the fixed rod is located in front of the cutting wheel (20); the starting end of the fabric (19) is manually fixed on the fixed rod. After the cutting wheel (20) rotates one or more times, it stops. The outer perimeter of the fabric roll on the cutting wheel (20) is checked by the length counting result. The outer perimeter of the fabric roll on the cutting wheel (20) is brought to a predetermined value by controlling the drive structure. The cutting wheel (20) continues to rotate until the predetermined number of revolutions is reached and then stops. The back of the fabric roll is cut manually; then one end of the fabric (19) is pulled backward by the manual to the roller conveyor structure (35) of the transfer conveyor; the transfer conveyor belt (33) and the roller conveyor structure (35) move synchronously to transport the fabric (19) backward to the cutting table (18); after the fabric (19) enters the cutting table (18), the rear turning frame (32) rotates to the horizontal until the end.

10. The fabric cutting method according to claim 9, characterized in that, The fabric winding process of the cutting roller (20) is as follows: The drive structure operates according to the number of rotations of the shaft (2). After the shaft (2) rotates a predetermined number of times, the drive structure drives the outer slip ring (9) to move inward a predetermined distance. The outer slip ring (9) drives the inner slip ring (8) of another drive structure to move outward through the synchronous slide rod (15). Since the two drive structures move synchronously, the two outer slip rings (9) move inward synchronously, and the two inner slip rings (8) move outward synchronously. For one drive structure, the outer slip ring (9) pulls the inner cable (14), and the inner slip ring (8) releases the outer cable (13). Then the slide (7) moves toward the shaft (2), and all slides (7) move synchronously. The diameter of the circle formed by the crossbar (3) decreases, and the outer diameter of the fabric roll on the cutting roll wheel (20) remains unchanged.

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