Continuous sewing method with magic tape bandage

Abstract

A continuous sewing method of magic tape bandage adopts a continuous sewing production line, the continuous sewing production line includes a bandage unwinding device, a fixed-length cloth feeding and cutting mechanism, a fixed-length material taking and overturning mechanism, a transfer arm mechanism, an automatic overlock machine, an automatic flat sewing machine, a magic tape feeding mechanism, an automatic winding mechanism, a workbench and a sewing machine driving device; the fixed-length material taking and overturning mechanism includes a chuck, a rotary head and a chuck direct driving device; the transfer arm mechanism includes a first pressing cylinder, a second pressing cylinder, a slide rail, a first translation conveying cylinder, a second translation conveying cylinder and a hanger; the fixed-length cloth feeding and cutting mechanism is matched with the fixed-length material taking and overturning mechanism, and the fixed-length material taking and overturning mechanism is used for fixed-length grabbing and overturning treatment of the bandage; the transfer arm mechanism is used for conveying the bandage to be sewn to the sewing device, and the magic tape feeding mechanism is used for stacking the magic tape on the bandage to be sewn. The application provides the function of realizing continuous production of the magic tape bandage.

Description

[0001] This invention is a divisional application of "Continuous sewing production line and method with Velcro bandage" (application number: 2022100443771; application date: January 14, 2022). Technical Field

[0002] This invention belongs to the field of medical dressing product manufacturing technology, and specifically relates to a continuous sewing method for a bandage with Velcro straps. Background Technology

[0003] Bandages with Velcro are bandage products formed by adding Velcro to both ends of ordinary bandages. Both ends of the Velcro need to be fixed (fixation methods include sewing, pasting, or ultrasonic welding), and the two Velcro pieces need to be placed on two different sides of the bandage, one on the front and one on the back. Currently, this product is basically made manually, resulting in low work efficiency. Therefore, designing an automated continuous production line is a future research direction. Chinese patent document CN 108175571 A (the patent technology applied for by our company) discloses "A medical elastic bandage with Velcro and its manufacturing method and equipment," providing a feasible solution for the automated production technology of bandages with Velcro. This patent discloses: a bandage feeder, a Velcro feeding machine, and a bandage rolling device, etc.

[0004] However, the main problem with existing technologies is that the connection between the Velcro and bandage in ultrasonically welded bandages is too rigid, compromising the comfort of the bandage itself. This results in significant foreign body discomfort for patients during use, leading to its gradual market obsolescence. In conclusion, a continuous sewing production line that stitches Velcro onto bandages is currently lacking.

[0005] The minor issues are: 1. Current flat sewing machines do not have a backstitch function, making it easy for threads to come undone at both ends of the Velcro. 2. There is a lack of a device for cutting and turning the bandage to a fixed length, making it impossible to sew both ends of the bandage simultaneously. Summary of the Invention

[0006] In view of the technical problems existing in the background art, the continuous sewing method of the bandage with hook and loop fasteners provided by the present invention provides an automatic production process for sewing hook and loop fasteners to both ends of the bandage. The entire production line can continuously take a certain length of bandage to be sewn, and use an automatic overlock sewing machine and an automatic flat sewing machine to sew the hook and loop fasteners onto the bandage to be sewn. Then, an automatic winding mechanism is used to wind up the bandage, thus realizing the function of continuous production of bandages with hook and loop fasteners.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A continuous sewing method for bandages with Velcro straps employs a continuous sewing production line, which includes a bandage unwinding device, a fixed-length fabric feeding and cutting mechanism, a fixed-length material picking and turning mechanism, a transfer arm mechanism, an automatic overlock sewing machine, an automatic flat sewing machine, a Velcro feeding mechanism, an automatic roll-up mechanism, a worktable, and a sewing machine drive device; wherein the fixed-length material picking and turning mechanism includes a chuck, a rotating head, and a chuck direct drive device; the transfer arm mechanism includes a first pressing cylinder, a second pressing cylinder, a slide rail, a first translational conveying cylinder, a second translational conveying cylinder, and a hanger;

[0009] The steps for continuous sewing are as follows:

[0010] S1: Use a bandage unwinding device to set up the bandage roll, and use a fixed-length feeding and cutting mechanism to pull the bandage;

[0011] S2: The chuck direct drive device in the fixed-length material handling and flipping mechanism is activated, and the chuck direct drive device moves the chuck to the output end of the fixed-length fabric feeding and cutting mechanism.

[0012] S3: Clamping action and holding the end of the bandage;

[0013] S4: The chuck direct drive device resets, driving the chuck to retract to its initial position, while the chuck drives the bandage to move synchronously.

[0014] S5: Rotating head action, the rotating head drives the chuck to flip, and the chuck completes the flipping operation of the bandage; this step will cause the bandage on the second worktable to form a folded and twisted section;

[0015] S6: The chuck direct drive device is activated again, and the chuck direct drive device drives the chuck to extend in order to transfer the folded and twisted section to the top of the middle worktable.

[0016] S7: The clamp direct drive device is reset, and the first and second pressing cylinders are activated to press the bandage.

[0017] S8: The bandage cutting mechanism in the fixed-length fabric feeding and cutting mechanism operates to cut the bandage into a bandage to be sewn.

[0018] S9: The horizontal drive cylinder moves, causing one end of the bandage to be sewn to be moved a distance towards the second workbench surface.

[0019] S10: The first and second translational conveying cylinders are activated to press the bandage to be sewn, and the first and second pressing cylinders are reset, and the lateral drive cylinder is reset.

[0020] S11: The transfer drive device in the transfer arm mechanism is activated, driving the first translational conveying cylinder and the second translational conveying cylinder to move synchronously. The first translational conveying cylinder and the second translational conveying cylinder drive the bandage to be sewn to slide on the first worktable and the second worktable. After the bandage to be sewn is transported to the subsequent process equipment, the transfer drive device is reset, and the first translational conveying cylinder and the second translational conveying cylinder are reset.

[0021] S12: When the transfer arm mechanism transfers the bandage to be sewn to the hook and loop fastener feeding mechanism, the hook and loop fastener feeding mechanism places the hook and loop fastener on the bandage to be sewn.

[0022] S13: As the bandage to be sewn continues to move, the automatic overlock sewing machine and the automatic flat sewing machine sew the Velcro onto the bandage; if the automatic overlock sewing machine has an edge cutting mechanism at the front end, the edge cutting mechanism is used to cut off the excess edge material at the end of the bandage to be sewn.

[0023] S14: When the automatic flat sewing machine is sewing, after the automatic flat sewing machine initially sews a certain distance on the hook and loop fastener, the sewing machine drive device is activated and drives the entire automatic flat sewing machine to move a certain distance in the direction of the hook and loop fastener. When the flat sewing is about to end, the sewing machine drive device is activated again and drives the entire automatic flat sewing machine to move a certain distance in the direction of the hook and loop fastener. This step completes two backstitch operations on the hook and loop fastener.

[0024] S15: The sewn bandage with Velcro is rolled up using an automatic winding mechanism to complete one sewing process of a bandage with Velcro.

[0025] Preferably, the output end of the bandage unwinding device is provided with a fixed-length fabric feeding and cutting mechanism, which cooperates with a fixed-length material picking and turning mechanism. The fixed-length material picking and turning mechanism is used to grab the bandage at a fixed length and turn it over. A worktable is provided between the fixed-length fabric feeding and cutting mechanism and the fixed-length material picking and turning mechanism. A transfer arm mechanism is provided above the worktable. The transfer arm mechanism is used to transport the bandage to be sewn to the sewing device. An automatic winding mechanism is provided at the output end of the sewing device. A hook and loop fastener feeding mechanism is provided between the sewing device and the fixed-length material picking and turning mechanism. The hook and loop fastener feeding mechanism is used to place hook and loop fasteners on the bandage to be sewn.

[0026] The functions of the fixed-length material picking and flipping mechanism are: first, to pick up the bandage and lay it on the worktable, so that the transfer arm mechanism can operate it; second, to flip the bandage so that one end of the bandage is the front and the other end is the flipped side, so that the front and back sides can be sewn at the same time.

[0027] The fixed-length material handling and flipping mechanism includes a chuck, which is installed at one end of a rotating head. The chuck is used to hold the bandage. The rotating head is driven by a chuck direct drive device to move and extend. The chuck direct drive device is a cylinder. The extension rod of the cylinder is connected to the rotating head. The rotating head is connected to the extension rod through a gear set. The rotating head is equipped with a motor, which is used to drive the rotating head to rotate through the gear set.

[0028] Preferably, the sewing device includes an automatic overlock sewing machine and an automatic flat sewing machine. The transfer arm mechanism is used to transport the bandage to be sewn to the automatic overlock sewing machine. The output end of the automatic overlock sewing machine is equipped with an automatic flat sewing machine, and the output end of the automatic flat sewing machine is equipped with an automatic roll-up mechanism.

[0029] Preferably, the input end of the automatic overlock sewing machine is provided with an edge cutting mechanism, which is used to cut off the excess edge material at the end of the bandage to be sewn.

[0030] Preferably, the automatic flat sewing machine has a movable base at the bottom, which is driven to move by a sewing machine drive device. The sewing machine drive device drives the automatic flat sewing machine to move in order to realize the backstitch operation.

[0031] Preferably, the workbench includes a first workbench surface and a second workbench surface, with an intermediate workbench surface between the first workbench surface and the second workbench surface. The first workbench surface and the second workbench surface are at the same height, and the intermediate workbench surface is at a lower height than the first workbench surface and the second workbench surface.

[0032] Preferably, the fixed-length fabric feeding and cutting mechanism includes a roller active conveying mechanism, and the output end of the roller active conveying mechanism is provided with a bandage cutting mechanism. The roller active conveying mechanism is used to pull the bandage.

[0033] Preferably, the transfer arm mechanism includes a hanger, on which a pressing and translating mechanism is provided. The pressing and translating mechanism is used to press the bandage to be sewn and translate the bandage to be sewn to the Velcro feeding mechanism.

[0034] Preferably, the downward pressing and translating mechanism includes a first pressing cylinder and a second pressing cylinder. The first pressing cylinder is located above the first worktable surface, and the second pressing cylinder is located above the second worktable surface. The first pressing cylinder is connected to the hanger via a slide rail and is driven to move by a lateral drive cylinder. The downward pressing and translating mechanism also includes a first translating and conveying cylinder and a second translating and conveying cylinder. Both the first translating and conveying cylinder and the second translating and conveying cylinder are slidably connected to the hanger and are driven to slide by a transfer drive device. The first translating and conveying cylinder is located above the first worktable surface, and the second translating and conveying cylinder is located above the second worktable surface.

[0035] This patent can achieve the following beneficial effects:

[0036] 1. This invention provides an automated production process for sewing Velcro to both ends of a bandage. The entire production line can continuously take a certain length of bandage to be sewn, and use an automatic overlock sewing machine and an automatic flat sewing machine to sew the Velcro onto the bandage. Then, an automatic winding mechanism is used to roll it up, realizing the function of continuous production of bandages with Velcro.

[0037] 2. A movable base has been added to the existing automatic flat sewing machine, which can be used with the automatic flat sewing machine to perform two backstitch operations, thus avoiding the flat sewing thread from coming loose at both ends.

[0038] 3. The fixed-length fabric feeding and cutting mechanism, the fixed-length material picking and flipping mechanism, the transfer arm mechanism, and the worktable work together to complete the fixed-length material picking and feeding process. The fixed-length material picking and flipping mechanism has a flipping function, which allows the sewing device to sew the Velcro at both ends of the bandage to be sewn simultaneously, improving sewing efficiency. Furthermore, the cooperation of these four mechanisms also enables uninterrupted fixed-length material picking and feeding. Attached Figure Description

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0040] Figure 1 This is a schematic diagram of the manufacturing process structure of the present invention;

[0041] Figure 2 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 1 ;

[0042] Figure 3 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 2 ;

[0043] Figure 4 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 3 ;

[0044] Figure 5 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 4 ;

[0045] Figure 6 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 5 ;

[0046] Figure 7 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 6 ;

[0047] Figure 8 This is a schematic diagram of the fixed-length material feeding principle of the present invention. Figure 7 ;

[0048] Figure 9This is a simplified structural diagram of the fixed-length fabric feeding and cutting mechanism of the present invention;

[0049] Figure 10 This is a schematic diagram of the worktable and transfer arm mechanism of the present invention;

[0050] Figure 11 This is a schematic diagram illustrating the backstitch operation principle of the automatic flat sewing machine of the present invention. Figure 1 ;

[0051] Figure 12 This is a schematic diagram illustrating the backstitching operation principle of the automatic flat sewing machine of the present invention. Figure 2 ;

[0052] Figure 13 This is a top view of the fixed base of the present invention;

[0053] Figure 14 This is a diagram illustrating the sewing effect of the Velcro bandage of the present invention.

[0054] In the diagram: 1. Bandage unwinding device; 2. Fixed-length fabric feeding and cutting mechanism; 3. Roller active conveying mechanism; 4. Bandage cutting mechanism; 5. Fixed-length material picking and turning mechanism; 6. Chuck; 7. Gripper; 8. Rotating head; 9. Chuck direct drive device; 10. Transfer arm mechanism; 11. First pressing cylinder; 2. Second pressing cylinder; 3. Slide rail; 40. Lateral drive cylinder; 5. First translational conveying cylinder; 6. Second translational conveying cylinder; 7. Hanger. 407. Automatic overlock sewing machine; 5. Automatic flat sewing machine; 6. Velcro feeding mechanism; 7. Automatic roll-up mechanism; 8. Worktable; 9. First worktable surface; 901. Second worktable surface; 902. Middle worktable surface; 903. Bandage; 10. Bandage to be sewn; 11. Movable base; 12. Sewing machine drive device; 13. Fixed base; 14. Guide rail; 15. Strip groove; 16. Folding and twisting section; 17. Overlock thread; 18. Flat sewing thread; 19. Backstitch thread; 20. Detailed Implementation

[0055] Preferred solutions include Figures 1 to 14 As shown, a continuous sewing method for bandages with Velcro is employed in a continuous sewing production line. The continuous sewing production line includes a bandage unwinding device 1. The output end of the bandage unwinding device 1 is equipped with a fixed-length fabric feeding and cutting mechanism 2. The fixed-length fabric feeding and cutting mechanism 2 cooperates with a fixed-length material picking and turning mechanism 3. The fixed-length material picking and turning mechanism 3 is used to grab the bandage 10 at a fixed length and turn the bandage 10 over. A workbench 9 is provided between the fixed-length fabric feeding and cutting mechanism 2 and the fixed-length material picking and turning mechanism 3. A transfer arm mechanism 4 is provided above the workbench 9. The transfer arm mechanism 4 is used to transport the bandage 11 to be sewn to the sewing device. An automatic winding mechanism 8 is provided at the output end of the sewing device. A Velcro feeding mechanism 7 is provided between the sewing device and the fixed-length material picking and turning mechanism 3. The Velcro feeding mechanism 7 is used to stack the Velcro on the bandage 11 to be sewn.

[0056] The function of the fixed-length fabric feeding and cutting mechanism 2 is twofold: first, to pull the bandage 10 forward; and second, to cut the bandage 10 to obtain a fixed-length bandage 11 to be sewn. Specifically, the fixed-length fabric feeding and cutting mechanism 2 includes a roller-driven active conveying mechanism 201, with a bandage cutting mechanism 202 at its output end. The roller-driven active conveying mechanism 201 is used to pull the bandage 10. The bandage cutting mechanism 202 is an electric shear.

[0057] The functions of the fixed-length material handling and flipping mechanism 3 are as follows: First, it grasps the bandage 10 and lays it on the worktable 9, facilitating operation by the transfer arm mechanism 4; second, it flips the bandage 10 so that one end is the front and the other end is the back, facilitating simultaneous sewing on both sides. Specifically, the fixed-length material handling and flipping mechanism 3 includes a clamp 301, which is installed at one end of a rotating head 302. The clamp 301 is used to hold the bandage 10, and the rotating head 302 is driven by a clamp direct drive device 303 to perform translation and extension. The clamp direct drive device 303 is a cylinder, and the extension rod of the cylinder is connected to the rotating head 302. The rotating head 302 is connected to the extension rod through a gear set. The rotating head 302 is equipped with a motor, which drives the rotating head 302 to rotate through the gear set. The clamp 301 includes two movable clamping plates, which are driven by a cylinder or a motor. As an alternative, the rotary head 302 can also be a rotary cylinder, and the chuck can be other electric or pneumatic clamps.

[0058] The bandage unwinding device can be an active unwinding device, which can reduce the traction burden of the fixed-length feeding and cutting mechanism 2, thereby reducing the clamping force of the active conveying mechanism 201 and facilitating the material taking and turning mechanism 3 of the fixed-length material taking and turning mechanism to take the material.

[0059] Furthermore, the sewing device includes an automatic overlock sewing machine 5 and an automatic flat sewing machine 6. The transfer arm mechanism 4 is used to transport the bandage 11 to be sewn to the automatic overlock sewing machine 5. The output end of the automatic overlock sewing machine 5 is equipped with the automatic flat sewing machine 6, and the output end of the automatic flat sewing machine 6 is equipped with an automatic roll-up mechanism 8.

[0060] According to the process requirements, an edge cutting mechanism can be installed at the input end of the automatic overlock sewing machine 5. The edge cutting mechanism is used to cut off the excess edge material at the end of the bandage 11 to be sewn. The purpose of the edge cutting mechanism is to cut the two ends of the Velcro flat, and an existing electric gauze cutting device can be used.

[0061] Furthermore, the automatic flat sewing machine 6 is provided with a movable base 12 at the bottom. The movable base 12 is driven to move by the sewing machine drive device 13. The sewing machine drive device 13 drives the automatic flat sewing machine 6 to move in order to realize the backstitch operation.

[0062] A fixed base 14 is provided below the movable base 12. A guide rail 15 is provided between the fixed base 14 and the movable base 12. The fixed base 14 has a hollow structure and a strip groove 16 is provided on the upper surface of the fixed base 14. The sewing machine drive device 13 is an electric push rod or a cylinder. The telescopic rod of the sewing machine drive device 13 is used to connect the movable base 12. The sewing machine drive device 13 is fixed to the end of the fixed base 14.

[0063] As a preferred option, the sewing machine drive device 13 adopts an electric push rod, and the motor of the electric push rod is a servo motor, which can improve the control accuracy.

[0064] The movable base 12, when used with the automatic flat sewing machine 6, allows for two backstitch operations, such as... Figure 14 The image shows a diagram of a bandage with Velcro after sewing. Overlock stitch 18 and straight stitch 19 are sewn onto the Velcro. Because straight stitch 19 is prone to unraveling, a backstitch function is added, resulting in two additional backstitch threads 20 at both ends of straight stitch 19. Figure 11 He Ru Figure 12 As shown, the technical effect is achieved by the movable base 12 and the automatic flat sewing machine 6 moving together twice.

[0065] Furthermore, the workbench 9 includes a first workbench surface 901 and a second workbench surface 902, with an intermediate workbench surface 903 located between them. The first and second workbench surfaces 901 and 902 are at the same height, while the intermediate workbench surface 903 is lower than both. The first workbench surface 901, the second workbench surface 902, and the intermediate workbench surface 903 are all smooth surfaces, preferably smooth stainless steel surfaces. The U-shaped area above the intermediate workbench surface 903 serves as a bandage buffer area. The folding and twisting section 17 also transfers to the bandage buffer area, preventing the transfer arm mechanism 4 from wrinkling the product.

[0066] Furthermore, the transfer arm mechanism 4 includes a hanger 407, on which a pressing and translating mechanism is provided. This mechanism presses down on the bandage 11 to be sewn and translates it to the Velcro feeding mechanism 7. The function of the pressing and translating mechanism is to press down on the bandage 11 to facilitate cutting by the bandage cutting mechanism 202, and then transfer the cut bandage 11. The specific structure given in this embodiment is as follows:

[0067] The downward pressing and translating mechanism includes a first pressing cylinder 401 and a second pressing cylinder 402. The first pressing cylinder 401 is located above the first worktable 901, and the second pressing cylinder 402 is located above the second worktable 902. The first pressing cylinder 401 is connected to the hanger 407 via a slide rail 403 and is driven to move by a transverse drive cylinder 404. The downward pressing and translating mechanism also includes a first translating and conveying cylinder 405 and a second translating and conveying cylinder 406. Both the first translating and conveying cylinder 405 and the second translating and conveying cylinder 406 are slidably connected to the hanger 407 and are driven to slide by a transfer drive device. The first translating and conveying cylinder 405 is located above the first worktable 901, and the second translating and conveying cylinder 406 is located above the second worktable 902.

[0068] The purpose of the transverse drive cylinder 404 is to pull the bandage protruding on one side of the bandage cutting mechanism 202 back onto the first worktable 901, so as to avoid the Velcro sewing end having too long edge material.

[0069] The first translational conveying cylinder 405 and the second translational conveying cylinder 406 can be driven by a screw drive mechanism, or by a cylinder, or by a chain drive mechanism to drive reciprocating motion. Figure 1 From the perspective of the first translational conveying cylinder 405 and the second translational conveying cylinder 406, they move back and forth in the left and right directions.

[0070] In addition, the Velcro feeding mechanism 7 and the automatic winding mechanism 8 used in this invention can both be existing mature equipment, such as those disclosed in Chinese patent document CN 108175571 A (titled "A Medical Elastic Bandage with Velcro and its Manufacturing Method and Equipment").

[0071] Preferably, the production method of the continuous sewing method with Velcro bandage includes the following steps:

[0072] S1: The bandage roll is set up using the bandage unwinding device 1, and the bandage 10 is pulled using the fixed-length feeding and cutting mechanism 2;

[0073] S2: The chuck direct drive device 303 in the fixed-length material feeding and flipping mechanism 3 is activated, and the chuck direct drive device 303 moves the chuck 301 to the output end of the fixed-length fabric feeding and cutting mechanism 2.

[0074] S3: Clamp 301 moves and clamps the end of bandage 10;

[0075] S4: The chuck direct drive device 303 resets, driving the chuck 301 to retract to the initial position, while the chuck 301 drives the bandage 10 to move synchronously.

[0076] S5: Rotating head 302 moves, rotating head 302 drives chuck 301 to flip, chuck 301 completes the flipping operation of bandage 10; this step will cause the bandage 10 on the second worktable 902 to form a folded and twisted section 17.

[0077] S6: The chuck direct drive device 303 is activated again, and the chuck direct drive device 303 drives the chuck 301 to extend in order to transfer the folded and twisted section 17 to the upper part of the intermediate worktable 903.

[0078] S7: The clamp direct drive device 303 is reset, and the first pressing cylinder 401 and the second pressing cylinder 402 are activated to press the bandage 10.

[0079] S8: The bandage cutting mechanism 202 in the fixed-length fabric feeding and cutting mechanism 2 is activated to cut the bandage 10 into a bandage 11 to be sewn.

[0080] S9: The transverse drive cylinder 404 moves, causing one end of the bandage to be sewn 11 to be moved a distance towards the second workbench 902.

[0081] S10: The first translational conveying cylinder 405 and the second translational conveying cylinder 406 are activated to press the bandage 11 to be sewn, the first pressing cylinder 401 and the second pressing cylinder 402 are reset, and the transverse drive cylinder 404 is reset.

[0082] S11: The transfer drive device in the transfer arm mechanism 4 is activated, driving the first translational conveying cylinder 405 and the second translational conveying cylinder 406 to move synchronously. The first translational conveying cylinder 405 and the second translational conveying cylinder 406 drive the bandage to be sewn 11 to slide on the first worktable 901 and the second worktable 902. After the bandage to be sewn 11 is transported to the subsequent process equipment, the transfer drive device is reset, and the first translational conveying cylinder 405 and the second translational conveying cylinder 406 are reset.

[0083] In this embodiment, the subsequent process equipment is the hook and loop fastener feeding mechanism 7. The hook and loop fastener feeding mechanism 7 has a feeding conveyor belt at its rear end to continue conveying materials. The conveyor belt is symmetrically arranged to clamp the materials and continue to convey them forward until the sewing process is introduced. As an alternative, the conveying of the bandage 11 to be sewn can be carried out by the transfer arm mechanism 4. The disadvantage of this is that the conveying distance is longer and the reset time of the transfer arm mechanism 4 is longer.

[0084] S12: When the transfer arm mechanism 4 transfers the bandage 11 to be sewn to the hook and loop fastener feeding mechanism 7, the hook and loop fastener feeding mechanism 7 places the hook and loop fastener on the bandage 11 to be sewn.

[0085] S13: As the bandage 11 to be sewn continues to move, the automatic overlock sewing machine 5 and the automatic flat sewing machine 6 sew the Velcro onto the bandage 11 to be sewn; if the automatic overlock sewing machine 5 is equipped with an edge cutting mechanism at the front end, the edge cutting mechanism is used to cut off the excess edge material at the end of the bandage 11 to be sewn.

[0086] S14: When the automatic flat sewing machine 6 is sewing, after the automatic flat sewing machine 6 initially sews a certain distance on the hook and loop fastener, the sewing machine drive device 13 is activated and drives the automatic flat sewing machine 6 to move a certain distance in the direction of the hook and loop fastener. When the flat sewing is about to end, the sewing machine drive device 13 is activated again and drives the automatic flat sewing machine 6 to move a certain distance in the direction of the hook and loop fastener. This step completes two backstitch operations on the hook and loop fastener.

[0087] S15: The automatic winding mechanism 8 is used to roll up the sewn bandage with Velcro, completing one sewing process of bandage with Velcro.

[0088] In the above steps, during steps S1-S6, the fixed-length fabric feeding and cutting mechanism 2 works continuously without interruption. When steps S7-S10 are performed, the fixed-length fabric feeding and cutting mechanism 2 stops working, and the fixed-length fabric feeding and cutting mechanism 2 cooperates with the fixed-length material taking and flipping mechanism 3 to cut a certain length of bandage 11 to be sewn. When step S11 is started, the fixed-length fabric feeding and cutting mechanism 2 and the fixed-length material taking and flipping mechanism 3 operate to perform the next round of fixed-length material taking work.

[0089] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A continuous sewing method for a bandage with Velcro, characterized in that: A continuous sewing production line is adopted, which includes a bandage unwinding device (1), a fixed-length fabric feeding and cutting mechanism (2), a fixed-length material picking and turning mechanism (3), a transfer arm mechanism (4), an automatic overlock sewing machine (5), an automatic flat sewing machine (6), a Velcro feeding mechanism (7), an automatic roll-up mechanism (8), a worktable (9), and a sewing machine drive device (13); wherein the fixed-length material picking and turning mechanism (3) includes a chuck (301), a rotating head (302), and a chuck direct drive device (303); the transfer arm mechanism (4) includes a first pressing cylinder (401), a second pressing cylinder (402), a slide rail (403), a first translational conveying cylinder (405), a second translational conveying cylinder (406), and a hanger (407); The workbench (9) includes a first workbench surface (901) and a second workbench surface (902), with an intermediate workbench surface (903) between the first workbench surface (901) and the second workbench surface (902); the first pressing cylinder (401) is driven to move by a transverse drive cylinder (404); the fixed-length fabric feeding and cutting mechanism (2) includes a bandage cutting mechanism (202); The steps for continuous sewing are as follows: S1: Use the bandage unwinding device (1) to set up the bandage roll and use the fixed-length feeding and cutting mechanism (2) to pull the bandage (10); S2: The chuck direct drive device (303) in the fixed length material taking and turning mechanism (3) is activated, and the chuck direct drive device (303) moves the chuck (301) to the output end of the fixed length feeding and cutting mechanism (2); S3: The clamp (301) moves and clamps the end of the bandage (10); S4: The chuck direct drive device (303) resets, driving the chuck (301) to retract to the initial position, while the chuck (301) drives the bandage (10) to move synchronously; S5: The rotating head (302) moves, and the rotating head (302) drives the chuck (301) to flip, and the chuck (301) completes the flipping operation of the bandage (10); this step will cause the bandage (10) on the second worktable (902) to form a folded and twisted segment (17). S6: The chuck direct drive device (303) operates again, and the chuck direct drive device (303) drives the chuck (301) to extend in order to transfer the folded and twisted section (17) to the top of the intermediate worktable (903); S7: The clamp direct drive device (303) is reset, and the first pressing cylinder (401) and the second pressing cylinder (402) are activated to press the bandage (10); S8: The bandage cutting mechanism (202) in the fixed-length fabric feeding and cutting mechanism (2) is activated to cut the bandage (10) into a bandage (11) to be sewn. S9: The transverse drive cylinder (404) moves, causing one end of the bandage (11) to be sewn to move one end a distance toward the second workbench (902); S10: The first translational conveying cylinder (405) and the second translational conveying cylinder (406) are activated to press the bandage (11) to be sewn, the first pressing cylinder (401) and the second pressing cylinder (402) are reset, and the lateral drive cylinder (404) is reset. S11: The transfer drive device in the transfer arm mechanism (4) is activated, driving the first translational conveying cylinder (405) and the second translational conveying cylinder (406) to move synchronously. The first translational conveying cylinder (405) and the second translational conveying cylinder (406) drive the bandage to be sewn (11) to slide on the first worktable (901) and the second worktable (902). When the bandage to be sewn (11) is transported to the subsequent process equipment, the transfer drive device is reset, and the first translational conveying cylinder (405) and the second translational conveying cylinder (406) are reset. S12: When the transfer arm mechanism (4) transfers the bandage (11) to be sewn to the hook and loop fastener feeding mechanism (7), the hook and loop fastener feeding mechanism (7) places the hook and loop fastener on the bandage (11) to be sewn. S13: As the bandage (11) to be sewn continues to move, the automatic overlock sewing machine (5) and the automatic flat sewing machine (6) sew the Velcro onto the bandage (11); if the automatic overlock sewing machine (5) has an edge cutting mechanism at the front end, the edge cutting mechanism is used to cut off the excess edge material at the end of the bandage (11) to be sewn. S14: When the automatic flat sewing machine (6) is sewing, after the automatic flat sewing machine (6) initially sews a certain distance on the Velcro, the sewing machine drive device (13) is activated and drives the automatic flat sewing machine (6) to move a certain distance in the direction of the Velcro movement. When the flat sewing is about to end, the sewing machine drive device (13) is activated again and drives the automatic flat sewing machine (6) to move a certain distance in the direction of the Velcro movement. This step completes two backstitch operations on the Velcro. S15: Use the automatic winding mechanism (8) to roll up the sewn bandage with Velcro, and complete one sewing process of bandage with Velcro.

2. The continuous sewing method for a bandage with Velcro as described in claim 1, characterized in that: The output end of the bandage unwinding device (1) is provided with a fixed-length feeding and cutting mechanism (2). The fixed-length feeding and cutting mechanism (2) cooperates with the fixed-length material taking and flipping mechanism (3). The fixed-length material taking and flipping mechanism (3) is used to grab the bandage (10) at a fixed length and flip the bandage (10). A workbench (9) is provided between the fixed-length feeding and cutting mechanism (2) and the fixed-length material taking and flipping mechanism (3). A transfer arm mechanism (4) is provided above the workbench (9). The transfer arm mechanism (4) is used to transport the bandage (11) to be sewn to the sewing device. An automatic winding mechanism (8) is provided at the output end of the sewing device. A Velcro feeding mechanism (7) is provided between the sewing device and the fixed-length material taking and flipping mechanism (3). The Velcro feeding mechanism (7) is used to place the Velcro on the bandage (11) to be sewn. The function of the fixed-length material picking and flipping mechanism (3) is: first, to pick up the bandage (10) and lay the bandage (10) on the worktable (9) so that the transfer arm mechanism (4) can operate; second, to flip the bandage (10) so that one end of the bandage (10) is the front and the other end is the flipped side, so that the front and back sides can be sewn at the same time. The fixed-length material handling and flipping mechanism (3) includes a chuck (301), which is installed at one end of the rotating head (302). The chuck (301) is used to hold the bandage (10). The rotating head (302) is driven by the chuck direct drive device (303) to perform translation and extension. The chuck direct drive device (303) is a cylinder. The extension rod of the cylinder is connected to the rotating head (302). The rotating head (302) is connected to the extension rod through a gear set. The rotating head (302) is equipped with a motor, which is used to drive the rotating head (302) to rotate through the gear set.

3. The continuous sewing method for a bandage with Velcro as described in claim 2, characterized in that: The sewing device includes an automatic overlock sewing machine (5) and an automatic flat sewing machine (6). A transfer arm mechanism (4) is used to transport the bandage (11) to be sewn to the automatic overlock sewing machine (5). The output end of the automatic overlock sewing machine (5) is equipped with an automatic flat sewing machine (6). The output end of the automatic flat sewing machine (6) is equipped with an automatic roll-up mechanism (8).

4. The continuous sewing method for a bandage with Velcro straps according to claim 2, characterized in that: The automatic overlock sewing machine (5) has an edge cutting mechanism at its input end, which is used to cut the excess edge material at the end of the bandage (11) to be sewn.

5. The continuous sewing method for a bandage with Velcro as described in claim 2, characterized in that: The automatic flat sewing machine (6) has a movable base (12) at the bottom. The movable base (12) is driven to move by the sewing machine drive device (13). The sewing machine drive device (13) drives the automatic flat sewing machine (6) to move to realize the backstitch operation.

6. The continuous sewing method for a bandage with Velcro as described in claim 2, characterized in that: The first workbench (901) and the second workbench (902) are at the same height, while the middle workbench (903) is at a lower height than the first workbench (901) and the second workbench (902).

7. The continuous sewing method for a bandage with Velcro straps according to claim 2, characterized in that: The fixed-length fabric feeding and cutting mechanism (2) includes a roller active conveying mechanism (201), and the output end of the roller active conveying mechanism (201) is provided with a bandage cutting mechanism (202). The roller active conveying mechanism (201) is used to pull the bandage (10).

8. The continuous sewing method for a bandage with Velcro as described in claim 1, characterized in that: The transfer arm mechanism (4) includes a hanger (407), on which a pressing and translating mechanism is provided. The pressing and translating mechanism is used to press the bandage (11) to be sewn and to translate the bandage (11) to be sewn to the Velcro feeding mechanism (7).

9. The continuous sewing method for a bandage with Velcro strap according to claim 7, characterized in that: The pressing and translating mechanism includes a first pressing cylinder (401) and a second pressing cylinder (402). The first pressing cylinder (401) is located above the first worktable (901), and the second pressing cylinder (402) is located above the second worktable (902). The first pressing cylinder (401) is connected to the hanger (407) via a slide rail (403). The pressing and translating mechanism also includes a first translating and conveying cylinder (405) and a second translating and conveying cylinder (406). Both the first translating and conveying cylinder (405) and the second translating and conveying cylinder (406) are slidably connected to the hanger (407). The first translating and conveying cylinder (405) and the second translating and conveying cylinder (406) are driven to slide by a transfer drive device. The first translating and conveying cylinder (405) is located above the first worktable (901), and the second translating and conveying cylinder (406) is located above the second worktable (902).

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