Multi-color / gauge cord embroidery device

Abstract

This utility model discloses a multi-color / specification rope embroidery device, relating to the field of embroidery machine technology. It includes: a rope changing device for providing rope ends to be connected; an embroidery rope cutting device, comprising an adjustable rope cutting component and a rope holding component, the rope holding component clamping and fixing the embroidery rope and the cut end of the embroidery rope, the rope cutting component cutting the clamped embroidery rope; a rope end picking device, comprising an adjustable rope clamping component, the rope clamping component clamping and pulling the rope ends to be connected and the embroidery rope ends to form a parallel double rope segment; and a knotting device, comprising a knotting loop structure and a rope end hooking device, the knotting loop structure winding the parallel double rope segment to form a rope loop, the rope end hooking device passing the rope end through the rope loop and pulling it out, ultimately forming a knot. This utility model completes multi-color rope embroidery work by using a rope feeding device, with a compact structure, small obstruction area, and convenient use, and can meet the rope changing needs of more specifications of ropes.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, specifically to a multi-color / specification rope embroidery device. Background Technology

[0002] Given the stable and excellent performance of monochrome rope embroidery devices, monochrome rope embroidery devices still dominate the market. However, monochrome rope embroidery devices can only complete monochrome rope embroidery work. With the continuous growth of people's demand for diverse patterns and personalized designs, monochrome embroidery products can no longer meet consumers' aesthetic needs.

[0003] To meet market demands, engineers devised a structure using multiple loop heads laid out flat, with color changing achieved by moving the needle bar frame, as seen in Chinese patents CN219239975U and CN115637537A. However, because multiple loop heads are positioned side-by-side directly in front of the needle bar frame, the rope-swinging transmission mechanism becomes complex to ensure all loop heads can perform rope-swinging operations. This reduces the rotation control precision of the loop heads and occupies more space in front of the needle bar frame. Furthermore, when any component malfunctions and requires repair, the entire machine must be disassembled, making the disassembly and assembly process more labor-intensive. The large quantity, size, and complex structure of the embroidery ropes not only hinder their combination with other embroidery mechanisms but also increase the difficulty of threading the ropes. Furthermore, the number and specifications of the embroidery ropes should not be excessive. Another device that can meet the needs of multi-color rope embroidery mechanisms is to use a robotic arm to replace the loop-forming head separating plate. For example, Chinese patent CN113502615B discloses a loop-forming head separating plate transfer robotic arm rope locking device and embroidery machine. The technical solution adopted by this invention ensures that the rope does not detach from the robotic arm and the loop-forming head separating plate during the transfer process with the robotic arm. Therefore, technicians have developed a multi-color rope embroidery device. Because this technical solution requires the use of a robotic arm, the robotic arm needs to repeatedly separate, replace, and reinstall the loop head separating piece during the color-changing process. Although automatic color changing is achieved, frequent replacement of the loop head separating piece still affects work efficiency, and frequent replacement also shortens the lifespan of the loop head. Furthermore, the use of a robotic arm makes the rope embroidery device complex and requires a large installation space. In addition, the two solutions mentioned above have the same technical problem: the two rope ends at the color-changing junction are in a separate fixed state. When the rope end fixation fails, the pattern cannot remain stable.

[0004] Designing a multi-color / specification rope embroidery device that is easy to change ropes, highly efficient, and occupies little space in front of the needle bar frame is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a multi-color / specification rope embroidery device to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A multi-color / standard rope embroidery device includes a fixing frame, a rope feeding device for single-rope embroidery, and a rope feeding and receiving assembly. The embroidery rope passes through the rope feeding and receiving assembly and then enters the rope feeding device to complete the rope embroidery work. The multi-color / standard rope embroidery device also includes:

[0008] Rope changing device, used to transport the rope end of the corresponding color and / or specification of embroidery rope that needs to be connected at the rope supply device to the position waiting to be picked up.

[0009] The embroidery cord pressing and cutting device includes a cord holding component and a cord cutting component with adjustable position. The cord holding component is located between the cord cutting component and the cord retracting component. The cord holding component is used to clamp the embroidery cord waiting to be cut and to keep the cord end generated during the cutting process in a continuously clamped state. The cord cutting component is used to cut the embroidery cord clamped and fixed at the cord holding component.

[0010] The rope end picking device located on one side of the embroidery rope pressing and cutting device includes a rope clamping assembly with an adjustable position. By adjusting the position of the rope clamping assembly, the rope clamping assembly can be moved to the rope end to be picked up and simultaneously pick up and clamp the rope end to be connected provided by the rope changing device and the embroidery rope end that is clamped and limited at the rope holding assembly. Then, the movement of the rope clamping assembly is used to pull the rope end of the embroidery rope to generate a parallel section of two ropes.

[0011] The knotting device is located on one side of the formed parallel section of two ropes and completes the rope splicing work by tying a knot at the parallel section of two ropes.

[0012] Furthermore, the rope changing device includes a movable frame with several rope end positioning structures. The rope end positioning structures limit the rope ends of unused corresponding embroidery ropes, and the movement of the movable frame transports the corresponding rope ends to the position waiting to be picked up.

[0013] Furthermore, the rope-fixing opening of the rope-end positioning structure is an elastic clamping opening that remains normally closed.

[0014] Furthermore, the rope end positioning structure includes a rope pressing block and a guide sliding structure fixedly connected to the rope pressing block. The guide sliding structure cooperates with the moving frame. The rope pressing block can automatically press the embroidery rope onto the moving frame through the corresponding elastic structure. After the corresponding rope end positioning structure moves into place, the rope pressing block is driven by the pressing block drive mechanism to move so that the corresponding rope fixing opening enters the open state.

[0015] Furthermore, the rope-holding assembly includes a fixed clamping arm with a fixed position and a movable clamping arm that moves with the rope-cutting assembly. An elastic structure is provided between the movable clamping arm and the rope-cutting assembly. The compression and reset of the elastic structure provide a space for the movable clamping arm to move, so that when the rope-cutting assembly moves forward, the movable clamping arm reaches the position of the embroidery rope before the rope-cutting assembly and clamps the embroidery rope; when the rope-cutting assembly moves backward, the movable clamping arm leaves the position of the embroidery rope later than the rope-cutting assembly and maintains a continuous clamping state.

[0016] Furthermore, the knotting device includes a knotting loop structure and a rope end hooking device. The knotting loop structure includes a cylindrical member that can move forward, backward, and rotate. The outer periphery of the cylindrical member has a protruding hook rope portion. The hook rope portion moves and rotates with the cylindrical member, winding the parallel sections of the two ropes around the cylindrical member to form a rope loop. The rope end hooking device is used to make the rope end pass through the rope loop, and then the rope is pulled in the opposite direction by the embroidery rope to shrink the rope loop into a knot.

[0017] Furthermore, the rope-end hooking device includes a retractable rope hook located inside the cylindrical cavity of the cylindrical member, the hook opening of which can extend and retract into the cylindrical member.

[0018] Furthermore, the knotting device also includes a movable rope-pressing arm capable of pressing the two embroidery cords that produce parallel double-cord segments against the outer periphery of the tubular member. The movable rope-pressing arm is located on the side of the tubular member closest to the embroidery cord pressing and cutting device.

[0019] Furthermore, the knotting device also includes a rope-stopping arm, which is located between the tubular part and the embroidery rope pressing and cutting device and on one side of the parallel section of the two ropes. The two embroidery ropes forming the parallel section of the two ropes will be blocked by the rope-stopping arm as the hook rope part moves backward.

[0020] Furthermore, the knotting device also includes a rope pusher arm capable of pushing the rope loops wrapped around the cylindrical member off.

[0021] Furthermore, the cord clamping assembly can also move in a direction perpendicular to the direction of movement when the embroidery cord is being dragged, causing the two embroidery cords that form a parallel section to deflect towards the tubular component, so that the embroidery cords press against the tubular component or are pressed into the cord hook.

[0022] Furthermore, the rope ends to be connected and the embroidery rope ends are staggered at a certain distance.

[0023] Furthermore, the rope end to be connected and the embroidered rope end are distributed relative to each other, and the rope clamping assembly includes an active clamping arm and two driven clamping arms arranged side by side. The active clamping arm and the driven clamping arm achieve synchronous movement through a gear pair. An elastic element is connected between the driven clamping arm and the active clamping arm so that the rope clamping opening can be automatically closed. The rope clamping drive mechanism controls the two rope clamping openings to open synchronously by acting on the active clamping arm.

[0024] Furthermore, it also includes a control module, which is used to control the rope changing device, embroidery rope pressing and cutting device, rope end picking device, knotting device, rope feeding device, and rope winding and unwinding assembly to work together in a certain pattern according to a set program.

[0025] As can be seen from the above technical solutions, the advantages of this utility model and its preferred technical solutions are:

[0026] 1. In this invention, a rope-changing device moves the corresponding rope end to be connected to the designated position. Then, with the help of a rope end-picking device, the two embroidery ropes to be knotted are made to overlap. Next, a knotting device is used to knot the rope end to be connected to the existing embroidery rope, allowing for the reconnection of different colors and / or specifications of embroidery ropes for continuous work. This ensures that a single-rope embroidery device can complete embroidery work with multiple colors and specifications of embroidery ropes. The upward shift of the rope-changing mechanism reduces the space occupied by the rope-feeding device and minimizes obstruction in front of the needle bar during operation. This not only makes the rope-threading operation easier and more convenient but also facilitates its use in conjunction with other embroidery mechanisms. Furthermore, the absence of independent rope ends in the embroidered pattern ensures pattern stability.

[0027] 2. The knotting device of this utility model can reliably form a dead knot structure. Its knot is tight and has no risk of loosening. It can effectively resist the interference of external tension and friction, ensuring that the rope joint has high stability and reliability. It provides a solid guarantee for the continuous use of rope and thread in embroidery operations and avoids affecting the quality and efficiency of embroidery due to loosening or falling off of the knot.

[0028] 3. In the rope-changing stage of continuous embroidery, the relative positional relationship between the rope feeding device and the embroidery needle remains stable without any adjustment. At the same time, the embroidery needle itself does not need to reposition its embroidery position due to rope changing. This design feature allows the rope changing process to be smoothly connected, and the entire embroidery process is not disturbed by the rope changing action. Before and after rope changing, the distribution of each stitch on the embroidery can still remain uniform, ensuring the consistency and integrity of the pattern.

[0029] 4. This utility model is based on the existing monochrome embroidery rope mechanism and is modified to greatly reduce the modification cost for customers and can meet the embroidery use of ropes of more specifications. The specific structure of the monochrome embroidery rope mechanism can be found in CN202090174U and CN21031478U. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0031] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0032] Figure 2 This is a schematic diagram of the integrated structure required for completing rope replacement according to this utility model.

[0033] Figure 3 For the present utility model Figure 2 A magnified schematic diagram of the structure at point A in the diagram.

[0034] Figure 4 This is an isometric view of another rope-changing device according to the present invention.

[0035] Figure 5 For the present utility model Figure 4 A front view schematic diagram of the rope-changing device.

[0036] Figure 6 For the present utility model Figure 4 A schematic diagram of the rope end positioning structure.

[0037] Figure 7 This is a schematic diagram of the integrated structure required for completing the knotting and splicing of ropes according to this utility model.

[0038] Figure 8 This is a schematic diagram of the embroidery rope pressing and cutting device of this utility model.

[0039] Figure 9 This is a schematic diagram of the rope end picking device of this utility model.

[0040] Figure 10 This is a schematic diagram of the knotting device of this utility model. Figure 1 .

[0041] Figure 11 This is a schematic diagram of the knotting device of this utility model. Figure 2 .

[0042] Figure 12 This is a partial cross-sectional view of the knotting device of this utility model.

[0043] Figure 13 This is a schematic diagram of the structure of the rope retraction and release assembly of this utility model.

[0044] Figure 14 This is a schematic diagram showing the state of the embroidery rope during normal continuous embroidery.

[0045] Figure 15 This is a schematic diagram showing the state of the embroidered rope when it is cut during the rope changing process according to this utility model.

[0046] Figure 16 For the present utility model Figure 15 Enlarged schematic diagram of the structure at point E in the diagram.

[0047] Figure 17 This is a schematic diagram showing the state of the rope end picking device when the embroidery rope is picked up during the rope changing process.

[0048] Figure 18 This is a schematic diagram showing the state of the rope-picking device and the embroidery rope after the rope is picked up and dragged during the rope-changing process.

[0049] Figure 19 This is a schematic diagram of the knotting steps in this utility model. Figure 1 .

[0050] Figure 20 This is a schematic diagram of the knotting steps in this utility model. Figure 2 .

[0051] Figure 21 This is a schematic diagram of the knotting steps in this utility model. Figure 3 .

[0052] Figure 22 This is a schematic diagram of the knotting steps in this utility model. Figure 4 .

[0053] Figure 23 This is a schematic diagram of the knotting steps in this utility model. Figure 5 .

[0054] Figure 24 This is a schematic diagram of the knotting steps in this utility model. Figure 6 .

[0055] Figure 25 This is a schematic diagram of the knotting steps in this utility model. Figure 7 .

[0056] Figure 26 This is a schematic diagram of the knotting steps in this utility model. Figure 8 .

[0057] Explanation of reference numerals in the attached drawings: 1. Fixed frame; 2. Rope changing device; 2. Moving frame; 21. Rope pressing plate; 211. Rope pressing block; 22. Guide sliding structure; 23. Guide post; 231. End plate; 232. Return spring; 24. Pressing block drive mechanism; 25. Rope passage; 26. Hollow hole; 27. Fixed shaft; 28. U-shaped clamp; 29. ​​Locking bolt; 210. Embroidery rope pressing and cutting device; 3. Fixed cutter; 31. Movable cutter; 32. First return torsion spring; 33. Rope cutting control cylinder; 34. Rope passage hole; 35. Rope holding assembly; 36. Fixed clamp arm; 361. Movable clamp arm; 362. Spring; 363. L-shaped arm; 364. First tension spring; 37. Rope cutting base; 38. First position adjustment device; 4. First motor; 41. Shift fork connecting rod; 42. Rope end picking device; 5. Rope clamping base; 51. Lifting... 52. Lowering seat, 53. Active clamping arm, 54. Driven clamping arm, 55. Second tension spring, 56. Arm, 57. Drive arm, 58. Downward pressing swing arm, 59. Top pressing spring, 510. Guide drive block, 6. Second position adjustment device, 7. Knotting device, 71. Cylindrical part, 711. Hook rope part, 72. Cylindrical part drive device, 73. Pull rope hook, 74. Connecting rod, 75. Pushing device, 76. Movable rope pressing arm, 77. Rope blocking arm, 78. Pushing rope arm, 79. Knotting base, 710. Second motor, 720. Swing rod, 730. Crank connecting rod, 8. Rope winding and unwinding assembly, 81. Active rope feeding wheel, 82. Driven rope feeding wheel, 83. Elastic clamping force adjustment device, 831. Mandrel, 832. Guide adjustment rod, 833. Pushing spring, 9. Rope feeding device, 10. Operation panel, 20. Lifting device. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain the present utility model, but are not intended to limit the present utility model.

[0059] refer to Figures 1 to 26 ,like Figure 1 , Figure 2 and Figure 7As shown, this embodiment provides a multi-color / specification rope embroidery device, including a fixed frame 1, a rope changing device 2, an embroidery rope cutting device 3, a rope end picking device 5, a knotting device 7, a rope feeding and unloading assembly 8, and a rope feeding device 9 for single-rope embroidery. The fixed frame 1 is used to fix and connect to the machine head to realize the installation of the multi-color / specification rope embroidery device. The fixed frame 1 is used to support the embroidery rope cutting device 3, the rope end picking device 5, the knotting device 7, and the rope feeding and unloading assembly 8. During operation, the embroidery rope will first pass through the rope feeding and unloading assembly 8 and then enter the rope feeding device 9 for rope embroidery. The rope changing device 2 is used to transport the rope end of the corresponding color and / or specification embroidery rope that needs to be connected at the rope supply device to the rope end picking device 5. The picking position awaits pickup. The rope end awaiting pickup will be connected to the multi-color / specification rope embroidery device during the rope changing process, and then enter the rope feeding device 9 for embroidery. The rope cutting device 3 is located in front of the rope feeding assembly 8, specifically between the rope feeding assembly 8 and the rope changing device 2. The rope feeding assembly 8 is located between the rope cutting device 3 and the rope feeding device 9. The rope cutting device 3 includes a position-adjustable cutting assembly and a rope holding assembly 36 located on one side of the cutting assembly. The rope holding assembly 36 is located between the cutting assembly and the rope feeding assembly 8. The cutting assembly is used to cut the embroidery rope clamped and fixed at the rope holding assembly 36. The adjustable cord-cutting component can be misaligned with the embroidery cord when not in use, preventing accidental cutting of the embroidery cord and avoiding interference with the cord end pickup device 5. When cord replacement is needed, the cord-holding component 36 clamps and secures the embroidery cord. The cord-cutting component then cuts the clamped cord, creating a cord end connected to the embroidery fabric and a cord end to be attached to the free end of the cord roll. The resulting cord end remains clamped and secured by the cord-holding component 36, awaiting the knotting process, preventing the cut cord end from falling off and affecting the reliability of subsequent knotting and cord-attaching processes. The cord end pickup device 5 is located on one side of the embroidery cord cutting device 3, and includes a position-adjustable... When knotting and splicing is required, the adjustable rope clamping assembly can be moved to the position of the rope end to be picked up. This allows it to simultaneously pick up and clamp the rope end to be joined provided by the rope changing device 2 and the embroidered rope end clamped and limited at the rope holding assembly 36. Then, the movement of the rope clamping assembly pulls the rope end of the embroidered rope. After the rope ends of the two embroidered ropes run parallel for a distance, a double-rope parallel section is formed for knotting and splicing. The double ropes in the double-rope parallel section include the embroidered rope connected to the embroidery fabric and the embroidered rope of the corresponding specification and / or color to be joined, which is wound on the corresponding thread feeding wheel. The knotting device 7 is located on one side of the formed double-rope parallel section and completes the rope splicing work by knotting at the double-rope parallel section.Using the above structure, the present invention utilizes a rope-changing device 2 to provide the rope end to be connected. The embroidery rope to be connected can be a different specification and / or color than the embroidery rope currently being embroidered, or it can be the same embroidery rope currently being used for embroidery. The embroidery rope cutting device 3, the rope end picking device 5, and the knotting device 7 work together to knot the rope end to be connected with the embroidery rope end to complete the rope connection. This invention only requires the rope feeding device 9 used in single-rope embroidery to complete the embroidery work of multi-color / specification embroidery ropes. By knotting and connecting the ropes, the embroidery pattern is equivalent to being formed by continuous embroidery using a single embroidery rope with multiple colors, so that there are no independent rope ends in the embroidery pattern, making the pattern stable. Compared to existing cord feeding structures using multiple loop heads, the cord feeding device 9 for single-cord embroidery in this multi-color / specification cord embroidery device is smaller in size, thus occupying less space in front of the machine head and causing less obstruction. This makes cord threading easier and allows for easier integration with other embroidery mechanisms. The specific structure of the cord feeding device 9 can be found in the applicant's prior application documents, such as the combination structure of the drive component and loop wheel in CN210314786U. Compared to embroidery machines using detachable loop heads, this invention does not require space for a robotic arm at the needle bar, and the loop heads do not need to be frequently separated. In this invention, when changing cords during continuous embroidery, the positions of the cord feeding device 9 and the embroidery needle do not need to be adjusted. There is no need to reposition the embroidery position during cord changes, resulting in uniform stitch distribution and high-quality embroidery. This invention can be formed by modifying existing single-color cord embroidery mechanisms, which can greatly reduce the modification costs for customers.

[0060] In this embodiment, in order to enable the rope feeding device 9 to be raised for flexible use of embroidery rope, the rope feeding device 9 is connected to the fixed frame 1 through the lifting device 20, and the lifting device 20 is used to adjust the lifting and lowering action of the rope feeding device 9. In actual use, this application can be used in conjunction with the rope supply device in the prior art. The rope supply device has multiple thread feeding wheels with embroidery rope wound around them. When embroidering continuously, the embroidery rope on the corresponding thread feeding wheel of the rope supply device will first pass through the rope take-up and release assembly 8 before entering the rope feeding device 9 for rope embroidery work. The embroidery ropes on other thread feeding wheels of the rope supply device that are not in use remain in a broken rope state, that is, the unused embroidery ropes have free rope ends waiting to be connected.

[0061] To make the structure more compact and reduce the number of installation positions required on the frame during the installation of the multi-color / specification rope embroidery device, the rope supply device and rope changing device 2 are preferably set on the fixed frame 1. The disassembly and assembly of this mechanism can be achieved by disassembling and assembling the fixed frame 1, which simplifies the disassembly and assembly process and eliminates the need to readjust the positions between modules.

[0062] In this utility model, such as Figures 14 to 25As shown, the embroidery cord (BB) is the cord currently being embroidered, and the cord end is the corresponding cord end that is connected to the embroidery fabric when the embroidery cord is cut; the cord to be embroidered (AA) is the cord that is set on the thread feeder and is not used for embroidery, and the cord end to be connected is the broken end of the cord to be embroidered that is waiting to be connected to the embroidery device by knotting; the parallel double cord section (AA, BB) is the point where the cord ends with the cord end of the embroidery cord (BB) and the cord end of the cord to be embroidered (AA) are pinched together.

[0063] In this utility model, the rope changing device 2 can be a combination structure of multiple fixed rope feeders and a robot arm. The specific structure of the rope feeder can refer to the prior art. The robot arm grabs the rope end to be connected at the corresponding rope feeder and transports it to the corresponding position. Then, the rope end picking device 5 picks up the rope end to be connected and performs the subsequent knotting action.

[0064] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment, preferably, the rope changing device 2 includes a movable frame 21. The movable frame 21 is equipped with several rope end positioning structures. The rope end positioning structures limit the rope ends of unused corresponding embroidery ropes. The movement of the movable frame 21 transports the corresponding rope ends to the position waiting to be picked up and used. The rope changing device 2 can fix various embroidery ropes of different colors and / or specifications. The rope changing device 2 has the functions of fixing the rope ends of unused embroidery ropes and transporting rope ends, ensuring that the subsequent rope splicing process can be carried out reliably. Since the rope changing device 2 is located on top, it has a large space, which makes it possible to use a wider variety of embroidery ropes in one embroidery. When using the rope changing device 2, during continuous embroidery, the embroidery rope released by the thread feeding wheel will first pass through the rope end positioning structure and then enter the rope take-up and release assembly, and then enter the rope conveying device 9 for rope embroidery. After the embroidery rope is cut, the resulting rope ends to be spliced ​​are directly fixed by the rope end positioning structure to prevent the rope ends from drifting and affecting the next rope splicing.

[0065] Specifically, the rope changing device 2 also includes a synchronous belt mechanism 220. The movable frame 21 is slidably mounted on the corresponding guide rail located on the fixed frame 1, and the movable frame 21 is connected to the synchronous belt of the synchronous belt mechanism 220. The synchronous belt mechanism 220 is connected to the corresponding motor, and the movable frame 21 is driven to reciprocate along the guide rail by the movement of the synchronous belt.

[0066] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the rope-fixing opening of the rope-end positioning structure is a normally closed elastic clamping opening. Maintaining the normally closed state of the rope-fixing opening ensures that the rope end to be connected can be stably clamped and fixed even when not in use. When rope replacement is required, it allows the rope end to be connected to be reliably transported to the waiting position, ensuring smooth entry into the knotting process and making the knotting and rope-joining process reliable and stable.

[0067] In this utility model, such as Figure 3 The rope end positioning structure shown includes a rope pressing block 22 and a guide sliding structure 23 fixedly connected to the rope pressing block 22. The guide sliding structure 23 cooperates with the moving frame 21. The corresponding elastic structure makes the rope pressing block 22 automatically press the embroidery rope onto the moving frame 21. When the rope needs to be changed, after the corresponding rope end positioning structure moves into place, the rope pressing block 22 is driven to move away from the moving frame 21 by the pressing block driving mechanism 25, so that the corresponding fixed rope opening enters the open state, reducing the resistance encountered by the embroidery rope during the movement.

[0068] Specifically, the guide sliding structure 23 includes two guide posts 231 that slide in cooperation with the movable frame 21. One of the guide posts 231 has an end plate 232 at its end to prevent the guide post 231 from separating from the movable frame 21. The end plate 232 and the rope pressing block 22 are located on both sides of the rope pressing plate 211 of the movable frame 21. The embroidery rope passes between the two guide posts 231 to limit the embroidery rope. The embroidery rope is pressed against the rope pressing plate 211 by the rope pressing block 22 to limit and lock the rope end. The elastic structure is a return spring 24 sleeved on the corresponding guide post 231, and the return spring 24 is limited by the end plate. Between 232 and the rope pressing plate 211, the pressure block drive mechanism 25 is fixedly installed at the rope receiving position. When the corresponding rope head positioning structure moves into place, the pressure block drive mechanism 25 pushes the end plate 232 to make the guide post 231 move axially to drive the rope pressing block 22 away from the rope pressing plate 211, so that the embroidery rope is released and the moving resistance of the embroidery rope is reduced. The moving frame 21 is also provided with a rope passage 26 located below the rope head positioning structure. The rope passage 26 is used to guide and limit the rope head to be connected, so as to prevent the rope head positioning structure from being too close to the embroidery rope pressing and cutting device 3 and affecting the operation of the rope head picking device 5.

[0069] In practical use, the fixed rope opening of the rope end positioning structure can also remain open. Each rope end positioning structure is equipped with an independent pressure block drive mechanism 25 to control the closing of the fixed rope opening. When the rope end positioning structure holding the embroidery rope end waiting to be connected moves to the position where the rope end is waiting to be picked up, the corresponding pressure block drive mechanism 25 is released, and the fixed rope opening of the corresponding rope end positioning structure automatically enters the open state. This makes it easier to pull the embroidery rope during knotting and will not cause wear to the embroidery rope. When the embroidery rope is cut and a rope end waiting to be connected is generated, the pressure block drive mechanism 25 acts on the rope end positioning structure, causing the fixed rope opening of the rope end positioning structure to passively enter the closed state. Compared with the structure where the fixed rope opening of the rope end positioning structure is in a normally open state, the structure where the fixed rope opening of the rope end positioning structure is in a normally closed state only requires one set of pressure block drive mechanisms 25, which is simple in structure and low in cost.

[0070] In this utility model, such as Figure 4 , Figure 5 and Figure 6 Another rope end positioning structure is shown: the movable frame 21 is provided with a fixed shaft 28 and multiple through rope passages 26. The side wall of the rope passage 26 is provided with through hollow holes 27. The U-shaped clamp 29 connected to the fixed shaft 28 is equipped with a spring-shaped rope pressing block 22. The far end of the rope pressing block 22 passes through the corresponding hollow hole 27 and presses against the embroidery rope passing through the corresponding rope passage 26 to limit and fix the rope end of the embroidery rope. The elastic pressure applied to the embroidery rope by the rope pressing block 22 can be adjusted by loosening the locking bolt 210 and rotating the U-shaped clamp 29. After adjustment, the U-shaped clamp 29 is tightened on the fixed shaft 28 by tightening the locking bolt 210, so that the elastic pressure applied to the embroidery rope by the rope pressing block 22 is continuously stable. This not only fixes the rope end, but also avoids the embroidery rope from being deformed due to excessive resistance during movement. It also saves the use of the pressure block drive mechanism 25. The structure is simple and reliable.

[0071] like Figure 7 , Figure 8 , Figure 14 , Figure 15 and Figure 16As shown, the embroidery cord cutting device 3 also includes a cord cutting base 38 for mounting the cord cutting assembly. The cord cutting base 38 is slidably mounted on the fixed frame 1. The position of the cord cutting assembly is adjusted by controlling the movement of the cord cutting base 38 using the first position adjustment device 4. The cord cutting assembly includes a fixed cutter 31 fixedly mounted on the cord cutting base 38 and a movable cutter 32 hingedly mounted on the cord cutting base 38. A first return torsion spring 33 is provided at the hinge shaft of the movable cutter 32. The movable cutter 32 cooperates with the cord cutting control cylinder 34 mounted on the cord cutting base 38 to control the working state of the cord cutting assembly. The cord holding assembly 36 includes a fixed clamping arm 361 with a fixed position and a movable clamping arm 362 that moves with the cord cutting assembly. An elastic structure is provided between the movable clamping arm 362 and the cord cutting assembly. The compression and reset of the elastic structure reserve space for the movable clamping arm 362. Under the action of the elastic structure, 62 automatically moves towards the fixed clamping arm 361, so that the clamping opening of the rope holding assembly 36 is an elastic clamping opening when closed. The movable clamping arm 362 uses the elastic element to reserve the movement space so that when the rope cutting assembly moves forward, the movable clamping arm 362 can reach the position of the embroidery rope in advance to clamp the embroidery rope in advance. When the rope cutting assembly moves backward, the movable clamping arm 362 can lag behind the rope cutting assembly to separate from the embroidery rope, so that the embroidery rope head can still be clamped even when the rope cutting assembly moves backward a certain distance. The compression deformation of the elastic structure can also reduce the pressure on the embroidery rope when the rope cutting assembly continues to move forward, avoiding excessive pressure on the embroidery rope by the movable clamping arm 362 and causing excessive compression deformation. The movable clamping arm 362 adopts the above design form, which saves the drive structure of the rope holding assembly 36, making the structure compact and occupying little space.

[0072] Specifically, one end of the rope-cutting control cylinder 34 is hinged to the rope-cutting base 38, and the other end of the rope-cutting base 38 is hinged to the movable cutter 32. The extension and retraction of the cylinder rod of the rope-cutting control cylinder 34 controls the swing of the movable cutter 32. The fixed clamping arm 361 is fixedly installed on the fixed frame 1, and the movable clamping arm 362 is slidably disposed on the rope-cutting base 38. Under the action of the corresponding elastic element, the movable clamping arm 362 moves closer to the fixed clamping arm 361. In this utility model, the elastic element is preferably provided with A spring 363 is provided between the movable clamping arm 362 and the rope-cutting base 38, and a limiting structure is provided on the rope-cutting base 38 to prevent the movable clamping arm 362 from falling off. When rope cutting is required, the rope-cutting base 38 drives the rope-cutting assembly and the movable clamping arm 362 to move forward simultaneously toward the fixed clamping arm 361. The movable clamping arm 362 will reach the position of the embroidery rope before the rope-cutting assembly. Before the rope-cutting assembly reaches the position of the embroidery rope, it presses the embroidery rope against the fixed clamping arm 361 for fixation (at this time, the position of the rope-cutting assembly is set). (Set as the preparatory position) to clamp the embroidery cord before cutting; after the embroidery cord is clamped, when the cord-cutting base 38 continues to move forward, the movable clamping arm 362 is blocked by the fixed clamping arm 361 and cannot continue to move forward, and the spring 363 is compressed. At this time, the cord-cutting assembly will continue to move forward with the cord-cutting base 38 to the position of the embroidery cord, and can cut the embroidery cord; after the cord is cut, when the cord-cutting base 38 moves away from the fixed clamping arm 361, it drives the cord-cutting assembly to retreat. During the retreat of the cord-cutting base 38, the cord-cutting assembly... Between the position where the rope assembly leaves the embroidery rope and the ready position, the movable clamping arm 362, under the action of the spring 363, keeps the embroidery rope pressed against the fixed clamping arm 361. The rope holding assembly 36 always maintains a continuous rope clamping state. After the rope cutting assembly continues to retreat and is offset from the ready position, the movable clamping arm 362 no longer maintains a rope clamping state, ensuring that the embroidery rope end can be kept in a limited state before being picked up by the rope end picking device 5, ensuring reliable rope connection, and avoiding interference between the rope end picking device 5 and the rope cutting assembly.

[0073] In actual use, the rope holding assembly 36 can also be replaced by an independent opening and closing control clamping mechanism. The opening and closing control clamping mechanism can be set on the fixed frame 1. The structure of this utility model can meet the usage requirements and reduce the driving mechanism of the rope holding assembly 36, making the structure compact and requiring little space.

[0074] The specific structure of the first position adjustment device 4 in this utility model allows the rope cutting assembly to perform only forward or backward movements, or to achieve forward, backward, and lifting movements. The first position adjustment device 4 can be a linear drive mechanism, a cross drive mechanism, or a three-dimensional drive mechanism.

[0075] Preferably, in this utility model, the rope-cutting base 38 is slidably mounted on a corresponding guide rail located on the fixed frame 1. The rope-cutting base 38 is provided with a pin. The first position adjustment device 4 includes a first motor 41 mounted on the fixed frame 1 and a shift fork connecting rod 42 connected to the first motor 41. The pin is connected to the shift fork connecting rod. A first tension spring 37 that can pull the rope-cutting base 38 backward is connected between the rope-cutting base 38 and the fixed frame 1.

[0076] In this utility model, the fixing frame 1 is provided with a rope passage hole 35 located between the rope cutting assembly and the rope holding assembly 36. The rope passage hole 35 guides and positions the rope head, and can ensure that the rope head picking device 5 can reliably pick up the rope head of the embroidery rope.

[0077] In this embodiment, preferably, the rope hole 35 is located on the fixed clamping arm 361, wherein the fixed clamping arm 361 has an L-arm portion 364, the L-arm portion 364 includes a vertical fixed clamping arm and an end plate located at the upper end of the fixed clamping arm and perpendicular to the fixed clamping arm, and the rope hole 35 is located on the end plate.

[0078] In this utility model, one structure of the knotting device 7 can adopt the eagle beak knotting mechanism in the prior art, such as CN209865294U or CN217994884U.

[0079] In this utility model, another structure of the knotting device 7 can adopt the knotting method of the rope winding tube and the rotating ring in the prior art CN114802874B.

[0080] The first structure uses a rotating beak to clamp and pull the rope end to complete the knot. However, once the beak clamps the rope end, the clamping position is difficult to adjust, and the knotting form (slip knot or dead knot) depends on the amount of rope left, resulting in low controllability of the knot. Therefore, it is mostly used for slip knots. Furthermore, the beak structure requires different drive mechanisms to complete the three actions of rotation, opening and closing the clamp, and swinging the pull head. It also needs a push-line mechanism to reliably hook the rope onto the beak head, making the structure complex and space-consuming. The second structure can generate dead knots, but the knotting method of the rope tube and rotating ring in the second structure requires the rotating ring to move in coordination with the rope tube during the looping process. The rotating ring needs to be equipped with a rotation and movement drive mechanism, and the rope tube is connected to a moving frame, which needs to be equipped with a movement drive mechanism, making the structure complex, requiring more installation space, and increasing costs.

[0081] Due to the limited installation space at the head of the embroidery machine, the size of the embroidery device directly affects the installation of other embroidery devices. Existing knotting structures are bulky, which greatly limits their applicability.

[0082] like Figure 2 , Figure 10 , Figure 11 and Figure 12 As shown, a specific embodiment of this application provides a simple, compact, and small-sized knotting structure. The knotting device 7 includes a knotting loop structure and a rope hook pulling device. The knotting loop structure includes a knotting base that can move back and forth, a translation drive mechanism connected to the knotting base, and a cylindrical member 71 hinged to the knotting base. The cylindrical member 71 can move with the knotting base 79 to realize the adjustment of the front and back position of the cylindrical member 71. The cylindrical member 71 is driven by a cylindrical member drive device 72 provided on the knotting base 79. The outer periphery of the cylindrical member 71 is provided with a radially protruding hook rope portion 711. During the rotation and axial back and forth movement of the cylindrical member 71, the hook rope portion 711 blocks the parallel sections of the double ropes of the embroidery rope to wrap around the outer periphery of the cylindrical member 71 to form a rope loop. The cylindrical member drive device 72 is a synchronous belt drive mechanism. After the rope loop is formed, if there are no requirements for the knotting method, the retractable opening and closing clamp provided in the cylindrical part 71 can be used to clamp and pull the rope end to pass through the rope loop to form a knot.

[0083] Specifically, the knotting base 79 is slidably mounted on the fixed frame 1 via a corresponding guide rail. The translation drive mechanism includes a second motor 710 fixedly mounted on the fixed frame 1, a rocker arm 720 connected to the second motor 710, and a crank connecting rod 730 connected between the rocker arm 720 and the knotting base 79. When the second motor 710 is working, it drives the rocker arm 720 to rotate, which in turn drives the crank connecting rod 730 to move, thereby driving the knotting base 79 to slide back and forth along the corresponding guide rail to achieve front and rear position adjustment.

[0084] Preferably, in this invention, the cylindrical member 71 is a hollow cylindrical member hinged to the knotting base, and the hook rope part 711 is a convex shaft extending radially.

[0085] like Figure 11 , Figure 12As shown, in this utility model, preferably, the rope end hooking device includes a retractable rope hook 73 located inside the cylindrical cavity of the cylindrical member 71. The hook opening of the rope hook 73 can extend and retract into the cylindrical member 71. The installation of the rope hook 73 inside the cylindrical member 71 minimizes the space occupied by the knotting device 7. The rope hook 73 is connected to the pushing device 75 set on the knotting base via a connecting rod 74. Preferably, the hook opening of the rope hook 73 faces the side of the initially generated parallel double rope section. By pulling the rope with the hook opening of the rope hook 73, the rope end can be directly and completely passed through the rope loop during the process of the rope hook 73 retracting into the cylindrical member 71, which facilitates the stable formation of a dead knot. During operation, the rope hook 73 extends to receive the rope end that is guided into the hook opening by the rotation of the hook rope part 711 and hooks and pulls it so that the end of the parallel double rope section can be completely passed through the rope loop to complete the knot, and the knot is a dead knot, making the rope connection reliable. The pushing device 75 is a push-pull cylinder.

[0086] Given the limited installation space of the embroidery device due to the distribution of the machine heads, the structural requirement for the embroidery device is that the smaller the structure, the better. In this utility model, the looping action is completed by the forward, backward and rotational movements of the cylindrical part 71 itself, making the looping structure simple and durable. The hook part 711 of the cylindrical part 71 can guide the crossing part of the rope end as the cylindrical part 71 rotates, so that the rope end segment that is clamped, limited and straightened by the rope end picking device 5 can reliably enter the hook mouth of the rope hook 73. After the knot is completed, the cylindrical part driving device 72 keeps the cylindrical part 71 stationary, waiting for the next knotting.

[0087] In practical use, the knotting and looping structure can also be a comb-shaped hook. The front end of the comb teeth of the comb-shaped hook has a guide slope that can guide the embroidery rope into the tooth groove. In the initial state, the comb-shaped hook is located at the rear end of the parallel section of the two ropes. The comb teeth of the comb-shaped hook are perpendicular to each other. When the comb-shaped hook moves forward, it will move closer to the parallel section of the two ropes. The comb-shaped hook continues to move forward. The comb teeth at the front end first press against the parallel section of the two ropes. Then, as the comb-shaped hook moves forward, it will slide the embroidery rope into the second tooth groove. After the comb-shaped hook moves back a certain distance, it rotates. The comb-shaped hook hooks and pulls the parallel section of the two ropes and twists it to form a rope loop. The intersection of the rope loop is located in front of the comb-shaped hook, so that the rope loop is generated at the first tooth groove. Then, the rope end is passed through the rope loop by repeatedly passing the clamp or rope hook through the gap between the comb teeth. The rope loop can be smoothly separated from the comb-shaped hook along the tip of the comb.

[0088] like Figure 2 , Figure 10 , Figure 11 , Figure 12 , Figure 17 and Figure 18As shown, in conjunction with the rope-changing device 2 in this embodiment, the knotting device 7 also includes a movable rope-pressing arm 76 capable of deflecting the two embroidery ropes that form a parallel double-rope section towards the cylindrical member 71. The deflection distance of the parallel double-rope section depends on the travel of the movable rope-pressing arm 76. Preferably, in this application, the deflected embroidery rope presses against the outer periphery of the cylindrical member 71, and the pressing position of the movable rope-pressing arm 76 does not change. The movable rope-pressing arm 76 is located on the side of the cylindrical member 71 closest to the embroidery rope pressing and cutting device 3. During operation, the movable rope-pressing arm 76 is used to move the two embroidery ropes towards the cylindrical member 71 and press them against the outer periphery of the cylindrical member 71, so that the overlapping sections of the two embroidery ropes approach each other to form a single strand. When the hook rope part 711 is working, it can stably wrap the single strand of embroidery rope around the cylindrical member 71, making the knotting more reliable. The use of the movable rope-pressing arm 76 can shorten the height of the hook rope part 711. Figure 19 As shown, the knotting device 7 also includes a rope-blocking arm 77 fixedly mounted on the fixed frame 1, located between the tubular member 71 and the embroidery rope pressing and cutting device 3. Under the clamping and traction of the rope end picking device 5 and the interaction of the pressing action of the movable pressing arm 76, the parallel sections of the two ropes form a state of lateral pressure against the outer periphery of the tubular member 71. At this time, the tubular member 71 is in a forward position, and the parallel sections of the two ropes are located between the rope-blocking arm 77 and the hook rope portion 711.

[0089] like Figure 20 As shown, to make the knot more reliable, the cylindrical part 71 rotates and moves backward. After the hook section 711 rotates, it interferes with the parallel section of the two ropes pressing against the cylindrical member 71. During the retraction of the cylindrical member 71, the embroidery rope is pulled backward. The embroidery rope located between the cylindrical member 71 and the embroidery rope pressing and shearing device 3 is blocked and hooked onto the rope-stopping arm 77. The rope-stopping arm 77's blocking action ensures the embroidery rope is tightly hooked onto the hook section 711. When the cylindrical member 71 retracts, the rope-stopping arm 77 prevents the embroidery rope located on the side of the rope-stopping arm 77 from retracting. Under the hooking action of the hook section 711, the embroidery rope reliably abuts against the hook section 711 and bends at the hook section 711 as the cylindrical member 71 retracts. The blocking action of the rope-stopping arm 77 allows the two embroidery ropes located between the hook section 711 and the rope-stopping arm 77 to come together, ensuring that the hook section 711 can reliably hook the parallel section of the two ropes and wind it into a rope loop when rotating. The rope-stopping arm 77 is preferably L-shaped or T-shaped as shown in the figure.

[0090] like Figure 10 , Figure 19 , Figure 20 , Figure 21 , Figure 22 , Figure 23 , Figure 24 and Figure 25As shown, in order to reliably separate the rope loop from the cylindrical member 71, the knotting device 7 also includes a rope pushing arm 78 that can push the rope loop wrapped on the cylindrical member 71 off. The rope pushing arm 78 acts on the side of the cylindrical member 71 away from the rope blocking arm 77.

[0091] Specifically, the push rope arm 78 is gate-shaped and includes a fixing part connected to the fixing frame 1 and a push rope part that fits against the outer periphery of the cylindrical member 71. The push rope part of the push rope arm 78 acts on the side of the cylindrical member 71 away from the embroidery rope pressing and cutting device 3. When the cylindrical member 71 retracts, the push rope arm 78 blocks the rope ring relative to the cylindrical member 71, thereby ensuring that the rope ring can be reliably separated from the cylindrical member 71.

[0092] like Figure 9 and Figure 18 As shown, in this utility model, the movable rope-pressing arm 76 is hinged to the fixed frame 1. A torsion spring is provided on the hinge shaft of the movable rope-pressing arm 76 to press it down. The parallel section of the two ropes passes under the movable rope-pressing arm 76. To ensure that the rope-end pickup device 5 can clamp the rope, a guide drive block 510 is provided on the side of the rope-clamping assembly to lift the movable rope-pressing arm 76. When the movable rope-pressing arm 76 is pressed down, a limiting structure can be used to prevent the movable rope-pressing arm 76 from pressing down further. The use of the rope-blocking arm 77 also ensures that the movable rope-pressing arm... Even when 76 is in the lower limit position, it can be smoothly lifted by the guide drive block 510. When the guide drive block 510 contacts the movable rope pressing arm 76, the movable rope pressing arm 76 is in a raised state, and the rope clamping assembly passes under the movable rope pressing arm 76 to clamp the rope end. When the guide drive block 510 separates from the movable rope pressing arm 76, the movable rope pressing arm 76 automatically swings back to its original position to press the rope under the action of the torsion spring. When the movable rope pressing arm 76 is controlled by a cylinder, motor or other transmission mechanism for lifting and lowering, the guide drive block 510 is not required.

[0093] Specifically, the guide drive block 510 is a wedge-shaped block structure with a guide slope on its upper surface. After the guide drive block 510 moves towards the embroidery cord pressing and cutting device 3 and inserts below the movable cord pressing arm 76, the movable cord pressing arm 76 slides along the guide slope and lifts up. When the guide drive block 510 retracts away from the embroidery cord pressing and cutting device 3, the movable cord pressing arm 76 automatically presses down and abuts against the guide slope under the action of the torsion spring. After the movable cord pressing arm 76 separates from the guide drive block 510, the movable cord pressing arm 76 uses a limiting structure to prevent further pressing down. By limiting the extreme pressing position of the movable cord pressing arm 76, it is ensured that the guide drive block 510 can smoothly enter below the guide drive block 510, thereby ensuring that the movable cord pressing arm 76 can be lifted stably and reliably. The rope clamping assembly passes under the movable rope pressing arm 76 to complete the rope clamping operation. In this embodiment, the limiting structure can be a fixed structure set on the fixed frame 1. Preferably, in this embodiment, the limiting structure is a guide rail of the second position adjusting device 6 used to drive the rope clamping assembly forward and backward.

[0094] When the rope applicable to this utility model has a certain stiffness, that is, when the end of the rope can automatically remain straight even when the cantilever is a short distance away, the rope end to be connected and the embroidery rope end are staggered at a certain distance. The movement direction of the rope end picking device 5 is adjusted and installed according to the direction of the rope end to be connected and the embroidery rope end. The direction of the rope end to be connected depends on the rope fixing direction of the rope end positioning structure of the rope changing device 2, and the direction of the embroidery rope end depends on the direction design of the embroidery rope pressing and cutting device 3, so as to ensure that the rope end picking device 5 can reliably clamp and pick up the rope.

[0095] Preferably, in this invention, both the rope end to be connected and the rope end being embroidered are distributed vertically, that is, the rope end to be connected and the rope end being embroidered are distributed opposite each other. The rope end to be connected automatically hangs down under the action of gravity. This minimizes the rope's travel and reduces unnecessary rope guiding devices, making the structure simple and compact. The rope end picking device 5 moves horizontally when pulling the rope, and the cylindrical part 71 is located below the parallel section of the two ropes, with the hook opening of the rope hook 73 facing upwards.

[0096] In this embodiment, preferably, the end of the rope to be connected and the edge of the embroidered rope end... Figure 2 The rope cutting assembly extends along the Z-axis, the rope clamping assembly moves along the X-axis when picking up the rope, and the tubular member 71 moves along the Y-axis. The X-axis and Y-axis are located on the horizontal plane, the Z-axis is a vertical direction perpendicular to the horizontal plane, and the tubular member 71 is located below the parallel section of the two ropes.

[0097] To ensure that the ends of the parallel double rope sections can reliably enter the hook opening of the pull rope hook 73, the rope clamping assembly can also move in a direction perpendicular to the direction of movement when the embroidery rope is being dragged. In this embodiment, preferably, the rope clamping assembly can also move up and down along the Z-axis, causing the two embroidery ropes that form the parallel double rope sections to deflect towards the cylindrical member 71, so that the embroidery ropes press against the cylindrical member 71 or are pressed into the pull rope hook 73. When the embroidery ropes press against the cylindrical member 71, it is ensured that the hook rope part 711 can reliably hook the two embroidery ropes when rotating, making the knot reliable. After the cylindrical member 71 retracts, the deflection of the embroidery ropes drives the embroidery ropes closer to the pull rope hook 73, and the rotated hook rope part 711 guides the embroidery ropes so that the ends of the ropes can be more reliably pressed into the hook opening of the pull rope hook 73.

[0098] In this utility model, the rope end picking device 5 also includes a rope clamping base 51 that is slidably mounted on the slide rail of the fixed frame 1 and can move along the X-axis. The rope clamping base 51 is provided with a lifting seat 52 that can slide along the Z-axis. The rope clamping assembly is mounted on the lifting seat 52, so that the rope clamping assembly can move in both the X and Z directions. When the rope clamping assembly moves along the X direction, it can pull and tighten or loosen the parallel section of the two embroidery ropes. When the rope clamping assembly moves along the Z-axis, it can deflect the ends of the parallel section of the two embroidery ropes. When the cylindrical member 71 extends forward, the deflection of the ends of the parallel section of the two ropes will cause the embroidery rope to press against the extended cylindrical member 71. After the cylindrical member 71 retracts and the pull hook 73 extends, the deflection of the ends of the parallel section of the two ropes will cause the parallel section of the two ropes to enter the hook mouth of the pull hook 73, ensuring high reliability when the pull hook 73 pulls the rope and high reliability of knotting.

[0099] Specifically, the rope clamping base 51 is slidably mounted on the fixed frame 1. The rope clamping base 51 is connected to the second position adjusting device 6 mounted on the fixed frame 1. The lifting seat 52 is slidably mounted on the rope clamping base 51. The rope clamping base 51 is provided with a lifting drive mechanism connected to the lifting seat 52. The second position adjusting device 6 is preferably a combination structure of a synchronous belt drive mechanism and a slider rail cooperation structure. The rope clamping base 51 is slidably connected to the rail and simultaneously connected to the synchronous belt of the synchronous belt drive mechanism. The lifting drive mechanism includes a motor and a downward pressure swing arm 58 connected to the motor. The rollers mounted on the downward pressure swing arm 58 are in abutting cooperation with the lifting seat 52. A top pressure spring 59 is connected between the lifting seat 52 and the rope clamping base 51 to drive the lifting seat 52 to reverse reset. In this embodiment, the downward pressure swing arm 58 is used to drive the lifting seat 52 to descend, and the top pressure spring 59 is used to drive the lifting seat 52 to rise and reset.

[0100] like Figure 7 , Figure 9 , Figure 17 , Figure 18 , Figure 19 , Figure 20 , Figure 21 , Figure 22 , Figure 23 , Figure 24 and Figure 25 As shown, in this utility model, the rope clamping assembly includes an active clamping arm 53 hinged to a rope clamping base 51 and two coaxially arranged driven clamping arms 54 hinged to the rope clamping base 51. The active clamping arm 53 has an active gear, and the driven clamping arms 54 have driven gears. The active clamping arm 53 and the driven clamping arms 54 achieve synchronous movement through a gear pair formed by the meshing of the active gear and the driven gear. Corresponding rope clamping openings are formed between the active clamping arm 53 and the corresponding driven clamping arm 54. The two rope clamping openings are located on the same straight line. The two driven clamping arms 54 are respectively connected to the active clamping arm 53 through corresponding elastic elements, so that the two rope clamping openings of the rope clamping assembly can be automatically closed. The rope clamping drive mechanism controls the two rope clamping openings to open synchronously by acting on the active clamping arm 53. By using the two driven clamping arms 54 to clamp two different rope ends respectively, the two rope ends can be clamped individually, which can meet the needs of splicing two ropes of different specifications or with slight differences in diameter, ensuring stable and reliable rope picking and knotting.

[0101] In this invention, the elastic element connecting the driven clamping arm 54 and the active clamping arm 53 is a second tension spring 55.

[0102] In this utility model, the rope clamping drive mechanism includes an arm 56 fixedly mounted on the active clamping arm 53 and a telescopic drive arm 57 mounted on the rope clamping base 51. The drive arm 57 pushes the arm 56 to make the active clamping arm 53 swing. Through the transmission of the gear pair, the driven clamping arm 54 swings, the rope clamping opening opens, and the gear pair that drives the active clamping arm 53 and the driven clamping arm 54 to move synchronously is in clearance fit, which reserves a certain clamping space for the driven clamping arm 54, so as to satisfy the function of reliably clamping two different specifications of embroidery ropes, and making the parallel section of the two ropes reliable and stable.

[0103] In this utility model, such as Figure 13 As shown, the multi-color rope embroidery mechanism also includes a rope feeding assembly 8. After knotting, the rope passes through the rope hole 35, the gap channel between the fixed clamping arm 361 and the movable clamping arm 362, and then enters the rope feeding assembly 8. It then passes through the rope feeding assembly 8 into the rope feeding device 9 to complete the embroidery work. The rope feeding assembly 8 serves two purposes: first, it controls the rope feeding speed, maintaining rope tension during embroidery to ensure consistent tension of the rope entering the rope feeding device 9; second, when changing to different ropes, during the knotting and splicing process, the embroidery rope needs to be pulled upwards in the opposite direction to reduce the contact friction between the embroidery rope and the edge of the rope hole 35, preventing damage and breakage. After knotting, when the rope feeding device 9 is not in operation, the embroidery rope can be dragged forward to reduce the rope loop, ensuring a stable and reliable knot.

[0104] The rope winding and unwinding assembly 8 can be two sets of reciprocating clamping devices, which pull the rope in both directions, and the two sets of clamping devices work alternately.

[0105] In this invention, the rope winding and unwinding assembly 8 includes an active rope feeding wheel 81 and a driven rope feeding wheel 82. The driven rope feeding wheel 82 is connected to the elastic clamping force adjusting device 83 to control the clamping force applied to the rope by the rope winding and unwinding assembly 8.

[0106] Specifically, the elastic clamping force adjustment device 83 includes a guide adjustment rod 832 mounted on the fixed frame 1. The two ends of the spindle 831, which is rotatably connected to the driven rope feeding wheel 82, are respectively sleeved on the corresponding guide adjustment rod 832. The driven rope feeding wheel 82 is brought closer to the active rope feeding wheel 81 by the push spring 833. In this embodiment, the guide adjustment rod 832 is inserted into the fixed frame 1, the threaded adjustment column abuts against the guide adjustment rod 832, and the push spring 833 is sleeved on the guide adjustment rod 832. The pre-compression of the push spring 833 is adjusted by turning the adjustment column, thereby adjusting the clamping force applied to the rope by the rope take-up and release assembly 8.

[0107] Other undisclosed structures of the rope retraction assembly 8 can be found in the corresponding structures in existing patent documents CN202090174U and CN21031478U, as well as the structure disclosed in CN201952627 U.

[0108] This utility model also includes a control module and an operation panel 10. By manipulating the buttons or screen on the operation panel 10, the control module inputs signals to the control module. The control module controls the rope changing device 2, the lifting device 20, the embroidery rope pressing and cutting device 3, the rope end picking device 5, the knotting device 7, the rope winding and releasing assembly 8, and the rope conveying device 9 to work together in a certain pattern according to the set program.

[0109] The “outer periphery of the cylindrical member 71” as defined in this application can be considered as the outer circumferential surface of the cylindrical member 71.

[0110] When the present invention is working normally, the control rope changing device 2 moves the corresponding rope head positioning structure to above the rope hole 35 of the embroidery rope pressing and cutting device 3. The rope head positioning structure releases the embroidery rope head. The embroidery rope passing through the corresponding rope head positioning structure is connected through the knotting device 7, passes through the rope hole 35, and then passes through the rope feeding assembly 8 and is sent into the rope feeding device 9 for embroidery work.

[0111] The mechanical linkage enables automatic cord changing and knot tying, ensuring precise cord end alignment and a secure knot during the cord changing process. Figures 14 to 26 As shown, the rope-changing and knot-tying process of this utility model is as follows:

[0112] Step 1: Before the cord-cutting component moves into position, the cord-holding component 36 clamps and secures the cord being embroidered. After the cord-cutting component continues to move into position, it cuts the cord being embroidered, creating a lower cord end being embroidered and an upper cord end to be embroidered. The lower cord end being embroidered is always clamped and secured by the cord-holding component 36. Figure 14 , Figure 15 and Figure 16 As shown;

[0113] Step 2: The rope cutting assembly retracts, and the clamping opening of the rope holding assembly 36 remains stably closed;

[0114] Step 3: Rope changing device 2 operates, moving the corresponding rope end to be connected to the desired position, such as... Figure 5 As shown;

[0115] Step 4: The rope clamping assembly moves forward to clamp and fix the lower and upper rope ends, then moves backward to pull and create a parallel section of two ropes. Simultaneously, the rope reeling and releasing assembly 8 moves the lower rope upward and the rope feeding mechanism releases the rope. The resulting parallel section of two ropes, under the downward pressure of the movable rope pressing arm 76 and the descending action of the rope clamping assembly, presses against the outer periphery of the cylindrical component 71. Figure 17 , Figure 18 As shown;

[0116] Step 5: The cylindrical component 71 advances a certain distance so that the hook rope part 711 crosses the parallel section of the two ropes. During the advancement of the cylindrical component 71, the hook rope part 711 rotates to the side of the cylindrical component 71 to avoid interference between the hook rope part 711 and the rope end pickup device 5. Figure 19 As shown;

[0117] Step Six: The cylindrical component 71 rotates forward, causing the hook rope part 711 to rotate to the top (0-degree position). Then, the cylindrical component 71 retracts, moving the hook rope part 711 behind the rope-stopping arm 77. At this point, the rotation of the hook rope part 711 will not interfere with the movable rope-pressing arm 76. With the assistance of the rope-stopping arm 77, the hook rope part 711 hooks and pulls the parallel section of the two ropes, creating a V-shaped bend. Figure 20 As shown;

[0118] Step 7: The cylindrical component 71 rotates in the opposite direction (towards the movable rope pressing arm 76) by a certain angle. During the rotation, the cylindrical component 71 moves forward and backward according to the set parameters. The parallel sections of the two ropes are bent onto the hook rope section 711 and then wound around the cylindrical component 71 to form a rope loop. Figure 21 , Figure 22 As shown;

[0119] Preferably, the cylindrical part 71 rotates in the opposite direction by 360°, that is, the hook rope part 711 rotates to the top (0 degrees position). During the rotation of the cylindrical part 71, the rope end picking device 5 first presses down to make the embroidery rope close to the cylindrical part 71 so that the hook rope part 711 can reliably hook and pull the two embroidery ropes, and then rises to avoid the hook rope part 711 interfering with the parallel section of the two ropes in the straightened state again, which would affect the formation of the rope loop.

[0120] Step eight: After the cylindrical part 71 rotates back to the 0-degree position, the rotation stops, and the rope hook 73 moves to extend the hook opening outwards. Figure 23 As shown;

[0121] Step Nine: The cylindrical part 71 continues to rotate to the initial position. Guided by the hook section 711 and the rope end pickup device 5, it descends and advances to loosen the rope end, allowing it to enter the upward-opening hook opening. Figure 23 As shown;

[0122] Step 10: The rope hook 73 retracts into the cylindrical part 71 to conceal the hook opening, preventing the rope head from accidentally separating from the rope hook 73. Simultaneously, the rope end pickup device 5 is released, and the rope hook 73 pulls the rope end out of the rope loop, facilitating the formation of a secure knot. Figure 24 As shown;

[0123] Step 11: The tubular component 71 retracts, and the rope-pushing arm 78 pushes the rope loop away from the tubular component 71. Specifically, the rope-pushing arm 78 is used to push the rope loop wrapped around the tubular component 71 to separate it from the tubular component 71. Figure 25 As shown;

[0124] Step 12: The rope feeding assembly 8 feeds the embroidery rope downwards, and the corresponding rope feeding device feeds the rope, tightening the rope loop. Simultaneously, the tubular component 71 and the rope hook 73 advance in sync. The rope hook 73 secures and pulls the rope end, accelerating the reduction of the rope loop to form a locked knot. The knot is now tied, and the rope change is successful. Figure 26 As shown;

[0125] Step 13: Extend the rope hook 73 to release the rope end, and the knot moves along with the embroidered rope until it passes through the rope hole 35 and enters the rope take-up and release assembly 8.

[0126] In the above rope changing and knotting process, if there is enough space, step five can be performed simultaneously with any one of steps one, two, three, or four.

[0127] By adopting the technical solution of this utility model, since the rope changing device 2, the embroidery rope pressing and cutting device 3, the rope end picking device 5, the knotting device 7, and the rope feeding and unloading assembly 8 are all positioned on the top, the lower section can complete multi-color embroidery using only the rope feeding device 9, making the lower section structure small in size. As a result, the number of colors of the embroidery rope is not limited by the size of the lower section structure, which can meet the needs of using embroidery ropes with more colors on one machine. In addition, this utility model can complete reliable dead knot knotting, making rope splicing reliable, and the structure is compact.

[0128] Structural advantages: The rope feeding device 9 is small in size, reduces the space occupied in front of the machine head, and improves the convenience of rope threading.

[0129] Quality Assurance: No need to adjust the position of the embroidery needle during the rope changing process; the stitches are evenly distributed, ensuring stable embroidery quality.

[0130] Cost advantage: Based on the modification of the existing monochrome mechanism, the customer's upgrade investment is reduced.

[0131] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the embodiments of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-color / specification rope embroidery device, comprising a fixing frame (1), a rope feeding device (9) for single-rope embroidery, and a rope feeding and receiving assembly (8), wherein the embroidery rope enters the rope feeding device (9) after passing through the rope feeding and receiving assembly (8) to complete the rope embroidery work, characterized in that, The multi-color / standard cord embroidery device also includes: Rope changing device (2), the rope changing device (2) is used to transport the rope end of the corresponding color and / or specification of the embroidery rope to be connected to the position waiting to be picked up; Embroidery cord cutting device (3), the embroidery cord cutting device (3) includes a cord holding assembly (36) and a cord cutting assembly with adjustable position. The cord holding assembly (36) is located between the cord cutting assembly and the cord retracting assembly (8). The cord holding assembly (36) is used to clamp the embroidery cord waiting to be cut and to keep the embroidery cord end generated during the cutting process in a continuously clamped state. The cord cutting assembly is used to cut the embroidery cord clamped and fixed at the cord holding assembly (36). Rope end picking device (5), the rope end picking device (5) includes a position adjustable rope clamping assembly. By adjusting the position of the rope clamping assembly, the rope clamping assembly can be moved to the rope end to be picked up and simultaneously pick up and clamp the rope end to be connected provided by the rope changing device (2) and the embroidery rope end clamped and limited at the rope holding assembly (36). Then, the movement of the rope clamping assembly is used to pull the rope end of the embroidery rope to generate a parallel double rope segment. The knotting device (7) is located on one side of the formed parallel double rope section and completes the rope joining work by knotting at the parallel double rope section.

2. The multi-color / gauge cord-embroidering device according to claim 1, wherein The rope changing device (2) includes a movable frame (21) that can move. The movable frame (21) is provided with several rope end positioning structures. The rope end positioning structures are used to limit the rope end of the corresponding unused embroidery rope. The movement of the movable frame (21) allows the corresponding rope end to be connected to be transported to the position waiting to be picked up.

3. The multi-color / gauge cord-embroidering device according to claim 2, wherein The rope-fixing opening of the rope-end positioning structure is normally closed.

4. The multi-color / gauge cord-embroidering device according to claim 3, wherein The rope end positioning structure includes a rope pressing block (22) and a guide sliding structure (23) fixedly connected to the rope pressing block (22). The guide sliding structure (23) cooperates with the moving frame (21). The rope pressing block (22) can automatically press the embroidery rope onto the moving frame (21) through the corresponding elastic structure. After the corresponding rope end positioning structure moves into place, the rope pressing block (22) is driven to move by the pressing block driving mechanism (25) so that the corresponding fixed rope opening enters the open state.

5. The multi-color / gauge cord-embroidering device according to claim 3, wherein The rope end positioning structure includes multiple rope passages (26) that pass through the movable frame (21) and a fixed shaft (28) that is fixedly installed on the movable frame (21). A spring-shaped rope pressing block (22) is installed on the clamp (29) connected to the fixed shaft (28). The far end of the rope pressing block (22) presses against the embroidery rope that passes through the corresponding rope passage (26).

6. The multi-color / gauge cord-embroidering device according to claim 1, wherein The rope holding assembly (36) includes a fixed clamping arm (361) with a fixed position and a movable clamping arm (362) that moves with the rope cutting assembly. An elastic structure is provided between the movable clamping arm (362) and the rope cutting assembly. The compression and reset of the elastic structure reserve space for the movable clamping arm (362) so that when the rope cutting assembly moves forward, the movable clamping arm (362) reaches the position of the embroidery rope before the rope cutting assembly and clamps the embroidery rope; when the rope cutting assembly moves backward, the movable clamping arm (362) lags behind the rope cutting assembly and leaves the position of the embroidery rope to maintain a continuous clamping state.

7. The multi-color / gauge cord-embroidering device according to claim 1, wherein The knotting device (7) includes a knotting loop structure and a rope end hooking device. The knotting loop structure includes a cylindrical member (71) that can move forward, backward, and rotate. The outer periphery of the cylindrical member (71) has a protruding hook rope portion (711). The hook rope portion (711) rotates and moves with the cylindrical member (71) to wrap the parallel sections of the two ropes around the cylindrical member (71) to form a rope loop. The rope end hooking device is used to make the rope end pass through the rope loop, and then use the embroidery rope to pull in the opposite direction to make the rope loop shrink into a knot.

8. The multi-color / gauge cord-embroidering device according to claim 7, wherein The rope end hooking device includes a retractable rope hook (73) located inside the cylindrical cavity of the cylindrical member (71), the hook opening of the rope hook (73) being able to extend and retract into the cylindrical member (71).

9. The multi-color / gauge cord-embroidering device according to claim 7, wherein The knotting device (7) further includes a movable rope pressing arm (76) capable of pressing two embroidery ropes that produce parallel double rope segments against the outer periphery of the tubular member (71), the movable rope pressing arm (76) being located on the side of the tubular member (71) near the embroidery rope pressing and cutting device (3).

10. The multi-color / specification rope embroidery device according to claim 7, characterized in that, The knotting device (7) also includes a rope-blocking arm (77), which is located between the tubular part (71) and the embroidery rope pressing and cutting device (3) and on one side of the parallel double rope section. The two embroidery ropes forming the parallel double rope section will be blocked by the rope-blocking arm (77) as the hook rope part (711) moves backward.

11. The multi-color / gauge cord-embroidering device according to claim 7, wherein The knotting device (7) also includes a rope pusher (78) capable of pushing off the rope loops wrapped around the cylindrical member (71).

12. The multi-color / gauge cord-embroidering device according to claim 7, wherein The cord clamping assembly can also move in a direction perpendicular to the direction of movement when the embroidery cord is dragged, causing the two embroidery cords that produce a parallel double cord segment to deflect toward the tubular member (71), so that the embroidery cords press against the tubular member (71) or are pressed into the cord hook (73).

13. The multi-color / gauge cord-embroidering device according to claim 1, wherein The knotting device (7) includes a knotting loop structure and a rope end hooking device. The knotting loop structure is a comb-shaped hook. The front end of the comb teeth of the comb-shaped hook has a guide slope that can guide the embroidery rope into the tooth groove. The comb-shaped hook hooks and twists the parallel sections of the two ropes to form a rope loop. The rope end hooking device is used to make the rope end pass through the rope loop.

14. The multi-color / gauge cord-embroidering device according to claim 2, wherein The rope ends to be connected and the embroidered rope ends are staggered at a certain distance.

15. The multi-color / gauge cord-embroidering device according to claim 14, wherein The rope end to be connected and the embroidered rope end are distributed relative to each other, and the rope clamping assembly includes an active clamping arm (53) and two driven clamping arms (54) arranged side by side. The active clamping arm (53) and the driven clamping arm (54) achieve synchronous movement through a gear pair. An elastic element is provided between the driven clamping arm (54) and the active clamping arm (53) to make the rope clamping opening automatically close. The rope clamping drive mechanism controls the two rope clamping openings to open synchronously through the active clamping arm (53).

16. The multi-color / gauge cord-embroidering device according to claim 1, wherein It also includes a control module and an operation panel (10). By manipulating the buttons or screen of the operation panel (10), signals are input to the control module. The control module controls the rope changing device (2), the embroidery rope pressing and cutting device (3), the rope end picking device (5), the knotting device (7), the rope feeding device (9), and the rope winding and unwinding assembly (8) to work together in a certain pattern according to the set program through the pre-input program.

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