A rope end picking device for picking up a rope end

Abstract

This utility model discloses a rope end picking device for rope splicing, relating to the field of embroidery machine technology. It includes a position-adjustable rope clamping assembly, comprising an active clamping arm and two coaxial driven clamping arms located on the same side of the active clamping arm. The active and driven clamping arms move synchronously via a gear pair transmission. An elastic element is provided between the driven and active clamping arms to automatically close the rope clamping opening of the assembly. A rope clamping drive mechanism controls the synchronous opening of the two clamping openings by driving the active clamping arm. The use of this utility model automates the rope-tying action, making the rope-tying process efficient and convenient.

Description

Technical Field

[0001] This utility model relates to the field of embroidery machine technology, specifically to a rope end picking device for rope splicing. Background Technology

[0002] In the field of embroidery machine technology, cord embroidery, as a unique decorative technique, can add rich texture and beautiful patterns to textiles, and has a wide range of applications in clothing, home furnishings, and many other fields. However, both single-color and multi-color cord embroidery face some problems that urgently need to be solved in the process of cord embroidery.

[0003] In monochrome cord embroidery, the cord is typically mounted in a coil on a cord holder. Since embroidery is a continuous process, new cord needs to be added once a coil is completely used up. Waiting until all the cord is used before reeling it in would halt the embroidery work, severely impacting production efficiency. To avoid this tedious and inefficient process of repeated reeling, the industry commonly employs manual splicing of the cord before it is fully used, thus enabling continuous embroidery. However, manual splicing not only increases the workload for operators but also makes it difficult to guarantee the quality and efficiency of the splicing, easily leading to weak splices and ultimately affecting the quality of the embroidered product.

[0004] For multi-colored cord embroidery, a common technique to meet the different color requirements of a design is to use multiple loop heads or detachable loop heads. By adjusting the different loop heads in conjunction with the needle, the cord color can be changed. However, this technique has significant drawbacks. During cord changing, multiple loosely secured cord ends are created within the design. These ends not only affect the overall aesthetics of the design and reduce product quality, but also compromise the design's stability. In subsequent use or processing, the cord ends are prone to loosening and detachment, affecting the product's lifespan.

[0005] To address the issue of multiple rope ends appearing in the pattern due to manual rope splicing and frequent rope changes, those skilled in the art have attempted to borrow from existing knotting devices to pinch and knot the ends of two ropes, thus enabling rope splicing. However, existing knotting devices are mostly used in packaging mechanisms and similar applications, and their rope end fixing devices typically employ a fixed-position design. In practical applications, this fixed-structure rope end fixing device requires a rope winding mechanism for auxiliary guidance to simultaneously fix both ends of the rope in the device, and a rope pressing device to bring the portions near the ends closer together to form a rope bundle. However, in the context of rope splicing in embroidery machines, due to the characteristics of embroidery ropes—single, continuous operation—should involve knotting the ends of two ropes to form a splice. Existing rope end fixing methods cannot meet the splicing requirements in the embroidery field, leading to difficulties in knotting and failing to effectively solve the rope splicing problem.

[0006] Therefore, how to provide a structure that can efficiently and stably pick up and position the rope end during the embroidery rope splicing process has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The purpose of this utility model is to provide a rope end picking device for rope splicing, which can accurately and efficiently pick up and fix the embroidery rope end and the rope end to be joined, realize the rope splicing operation of embroidery rope, and solve the problems of high strength, difficulty in quality assurance and rope end affecting quality and stability of existing technologies when manually splicing ropes, and when changing ropes of multiple colors of embroidery ropes.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A rope end picking device for splicing ropes includes a position-adjustable rope clamping assembly. The rope clamping assembly includes an active clamping arm and two driven clamping arms located on the same side of the active clamping arm and coaxially. The active clamping arm and the driven clamping arms are driven by a gear pair to achieve synchronous movement. An elastic element is provided between the driven clamping arms and the active clamping arms to automatically close the rope clamping opening of the rope clamping assembly. The rope clamping drive mechanism controls the two rope clamping openings to open synchronously by driving the active clamping arm.

[0010] Furthermore, the rope end pickup device also includes a slidably mounted rope clamping base. The rope clamping base can move forward and backward under the action of the first drive mechanism. The rope clamping assembly is mounted on the rope clamping base and can reciprocate in a direction perpendicular to the movement direction of the rope clamping base.

[0011] Furthermore, the rope clamping base is equipped with a sliding lifting seat and a fixed motor. A downward pressure swing arm is installed on the output shaft of the motor. The downward pressure swing arm presses against one end of the lifting seat, and the other end of the lifting seat is equipped with an elastic reset component. The lifting seat moves back and forth by cooperating with the elastic reset component.

[0012] Furthermore, the rope clamping drive mechanism is a push-drive mechanism that is fixedly mounted on the rope clamping base.

[0013] Furthermore, the pushing drive mechanism includes a cylinder connected to the rope clamping base and a drive arm connected to the cylinder, and the active clamping arm is provided with a lever that works in conjunction with the drive arm.

[0014] Furthermore, the gear pair is in a state of intermittent meshing.

[0015] Furthermore, the elastic element is a tension spring.

[0016] Furthermore, the clamping surfaces of the active and driven clamping arms have anti-slip patterns.

[0017] Furthermore, the first driving mechanism is a synchronous belt drive mechanism, and the rope clamping base is connected to the synchronous belt of the synchronous belt drive mechanism.

[0018] As can be seen from the above technical solutions, the advantages of this utility model and its preferred technical solutions are:

[0019] Secure and reliable clamping: The active and driven clamping arms move synchronously through gear transmission, and the clamping surfaces have anti-slip patterns. Combined with the automatic closing action of the tension spring, they can firmly clamp the end of the embroidery rope and prevent the rope end from slipping. By using two driven clamping arms to clamp different embroidery ropes, and with the gear pair in a gap meshing state to allow for some adjustment of the clamping arms, it can be ensured that two connected embroidery ropes of different specifications can be clamped reliably.

[0020] Flexible and convenient operation: The rope clamping base can move in multiple directions under the action of the first drive mechanism, and the lifting seat can move back and forth vertically under the action of the motor, so that the rope clamping assembly can accurately and quickly reach the end of the embroidery rope, improving the efficiency and accuracy of rope splicing operation.

[0021] High degree of automation: Through the automatic control of drive components such as cylinders and motors, the opening and closing of the rope clamping opening and the movement of the rope clamping assembly are realized, reducing manual intervention and improving production efficiency and product quality. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0024] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0025] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .

[0026] Figure 4 This is a schematic diagram of the rope clamping assembly of this utility model.

[0027] Figure 5 This is a schematic diagram of the rope-changing device used in conjunction with the present application in the field of rope embroidery.

[0028] Figure 6 This is an illustration of the use of this application in the field of rope embroidery. Figure 1 .

[0029] Figure 7 This is an illustration of the use of this application in the field of rope embroidery. Figure 2 .

[0030] Explanation of reference numerals in the attached drawings: 2. Rope changing device; 21. Moving frame; 211. Rope pressing plate; 22. Rope pressing block; 26. Rope passage; 27. Hollow hole; 28. Fixed shaft; 29. ​​U-shaped clamp; 220. Synchronous belt mechanism; 5. Rope end picking device; 51. Rope clamping base; 52. Lifting seat; 53. Active clamping arm; 54. Driven clamping arm; 55. Tension spring; 56. Arm; 57. Downward pressing swing arm; 58. Elastic reset component; 59. Cylinder; 510. Motor; 520. Guide drive block; 530. First drive mechanism; 6. Detailed Implementation

[0031] 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.

[0032] like Figures 1 to 4As shown, this utility model discloses a rope end picking device for splicing ropes. The rope end picking device 5 is mainly composed of a rope clamping assembly, a rope clamping base 51, a lifting base 52 and other related components, and the position of the rope clamping assembly can be dynamically adjusted. The rope clamping assembly is one of the core components. It includes a hinged active clamping arm 53 and two driven clamping arms 54 hinged to the same side of the active clamping arm 53 and coaxially arranged. 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 and driven gears. Corresponding rope clamping openings are formed between the active clamping arm 53 and the corresponding driven clamping arm 54, and the gear pair is in a gap meshing state. This gap meshing design provides a certain amount of flexible adjustment space for the driven clamping arms 54. By using the double rope clamping opening setting, two rope ends with a certain difference in diameter can be clamped separately, which can meet the needs of splicing two ropes of different specifications or with slight diameter differences, ensuring stable and reliable rope picking and knotting. The cord picking device can reliably pick up two different specifications of embroidery cord. A tension spring 55 is provided between the driven clamping arm 54 and the driving clamping arm 53 as an elastic element. In the natural state, the tension of the tension spring 55 causes the cord clamping opening of the cord clamping assembly to automatically close and clamp the embroidery cord. The two tension springs 55 can be located on the upper and lower sides of the cord clamping assembly or both on the same side of the cord clamping assembly. When the two tension springs 55 are located on the same side of the cord clamping assembly, the driven clamping arm 54 near the tension spring 55 is provided with a clearance groove, which facilitates the passage of the protrusion connected to the other driven clamping arm 54, so that the driven clamping arm 54 located in the lower layer can be easily connected to the corresponding tension spring 55. When it is necessary to pick up the cord end, the cord clamping opening can be quickly closed under the action of the tension spring 55, tightly clamping the cord end and ensuring a firm grip, preventing the cord end from slipping in subsequent operations.

[0033] In order to accommodate the ends of the embroidery rope and the rope to be embroidered that are distributed at different angles, the clamping surface of the active clamping arm 53 can be a flat surface or an irregular surface, and the driven clamping arm 54 can be a straight arm or an irregular arm that works in conjunction with the active clamping arm 53.

[0034] Preferably, in this application, the ends of the embroidery cord and the ends of the cord to be embroidered are arranged opposite each other and on the same straight line, and the clamping surface of the active clamping arm 53 is planar.

[0035] The clamping surfaces of the active clamping arm 53 and the driven clamping arm 54 have anti-slip patterns. During the embroidery process, the embroidery rope will be subjected to a certain tension. The anti-slip patterns can effectively increase the friction between the clamping surface and the end of the embroidery rope, further preventing the rope end from slipping, ensuring the reliability of clamping, and meeting the strict requirements for rope end fixation in embroidery operations.

[0036] The rope-end picking device 5's rope-clamping base 51, under the action of the first driving mechanism 6, can move forward, backward, or forward, backward, left, and right. The rope-clamping assembly is mounted on the rope-clamping base 51 and can reciprocate in a direction perpendicular to the movement direction of the rope-clamping base 51. During the embroidery process, when rope splicing is required, the rope-clamping base 51, driven by the first driving mechanism 6, can precisely move to the vicinity of the rope end currently being embroidered and the rope end to be spliced, based on the position information of the embroidery rope. This multi-directional movement capability allows the rope-clamping assembly to quickly and accurately reach the target position when picking up the rope end, preparing for subsequent rope-clamping operations and improving the efficiency of the entire rope splicing process. After picking up the rope end, the rope-clamping assembly can adjust the direction or angle of the rope bundle according to the requirements of the knotting mechanism, enabling better cooperation with the knotting mechanism.

[0037] Specifically, the rope clamping base 51 is slidably mounted on the fixed frame. The first drive mechanism 6 can be a linear drive mechanism to achieve forward and backward drive or two linear drive mechanisms that work in a cross-shaped cooperation to achieve forward, backward, left and right movement drive. The linear drive mechanism can be an electric slide rail structure, a mechanism that combines a cylinder with a slide rail slider, or a screw and nut mechanism.

[0038] Preferably, in this utility model, the first driving mechanism 6 is a linear driving mechanism, which enables the rope clamping base 51 to move forward and backward.

[0039] Specifically, the first drive mechanism 6 is a synchronous belt drive mechanism, and the rope clamping base 51 is connected to the synchronous belt of the synchronous belt drive mechanism. Synchronous belt drive has the advantages of smooth transmission, high precision, and low noise, and can accurately control the movement position and speed of the rope clamping base.

[0040] In this embodiment, the preferred method is to limit the installation orientation of the parts of the rope end picking device 5 by having the rope clamping base 51 move forward and backward in the horizontal direction and the lifting base 52 move up and down in the vertical direction. The rope end picking device 5 can be deflected as a whole to adjust the installation angle according to the usage requirements.

[0041] In this application, the lifting seat 52 is in an elevated state for an extended period. The rope clamping base 51 has a sliding lifting seat 52 and a fixed motor 510. The rope clamping assembly can reciprocate in a direction perpendicular to the movement direction of the rope clamping base 51. This movement is achieved through the reciprocating movement of the lifting seat 52. A downward-pressing arm 58 is mounted on the output shaft of the motor 510, pressing against the upper end of the lifting seat 52. The lower end of the lifting seat 52 has an elastic reset element 59 (such as a spring or elastic component). When the motor rotates, the downward-pressing arm 58 rotates accordingly, pressing against one end of the lifting seat 52, causing the lifting seat 52 to move downward against the elastic force of the elastic reset element. When the motor rotates in the opposite direction, and the downward-pressing arm 58 no longer presses against the lifting seat 52, the lifting seat 52 automatically resets and moves upward under the action of the elastic reset element.

[0042] Preferably, the downward swing arm 58 is provided with rollers that contact the lifting seat 52.

[0043] In this embodiment, the combination structure of motor 510 and lowering swing arm 58 can also be replaced by a cylinder drive mechanism, an electric push rod, or other linear drive mechanism. The combination structure of motor 510 and lowering swing arm 58, combined with elastic reset member 59, enables motor 510 to achieve reciprocating drive of lifting seat 52 when rotating in one direction. And if necessary, the combination structure of motor 510 and lowering swing arm 58 can also be interchanged with the position of elastic reset member 59.

[0044] In the embodiments of this application, the rope clamping drive mechanism is a push-driven mechanism fixedly installed on the rope clamping base 51. The push-driven mechanism includes a cylinder 520 connected to the rope clamping base 51 and a drive arm 57 connected to the cylinder. The active clamping arm 53 is provided with an arm rod 56 that works in abutment and cooperation with the drive arm 57. When the cord clamping opening needs to be opened, cylinder 520 actuates, and drive arm 57 extends forward to push arm 56, causing active clamping arm 53 to rotate outward against the tension of spring 55. Since active clamping arm 53 and driven clamping arm 54 are driven by a gear pair, driven clamping arm 54 will also rotate synchronously, thereby opening the two cord clamping openings simultaneously so that the embroidery cord end can enter the cord clamping opening. When cylinder 520 retracts and drive arm 57 retracts to release the pressure arm 56, active clamping arm 53 and driven clamping arm 54 automatically reset under the action of spring 55, closing the cord clamping opening and clamping the embroidery cord end. This method of controlling the opening and closing of the cord clamping opening by driving active clamping arm 53 with cylinder is simple to operate, responds quickly, and can meet the needs of embroidery machines for rapid cord splicing. The arm 56 is designed to allow the drive arm 57 to be misaligned with the rope clamping opening, which will not affect the picking up of the rope end. The cylinder is set on the rope clamping base 51 and does not move with the movement of the lifting seat 52. There is no need to reserve space for the lifting of the cylinder, making the structure more compact and small.

[0045] To make the structure more compact, the boom 56 can be mounted on the active clamping arm 53, extending vertically upwards (e.g., Figure 1 , Figure 2 (as shown) or arranged on the active gripper 53 extending rearward in the horizontal direction (e.g.) Figure 3 , Figure 4 (As shown).

[0046] When the rope-joining end-picking device 5 has an elastic swinging device in front that obstructs the advance of the rope clamping assembly, a guide drive block 530 with a guide slope that can lift the elastic swinging device can be provided on the rope clamping base 51. The guide drive block 530 is inserted below the elastic swinging device and the elastic swinging device swings as it slides along the slope.

[0047] The working principle is as follows: Before picking up the rope end, the push-drive mechanism opens the rope clamping opening and drives the rope clamping assembly to move forward. However, after the rope end enters the rope clamping opening, the push-drive mechanism releases the active clamping arm 53. The tension of the tension spring 55 causes the rope clamping opening of the rope clamping assembly to automatically close and clamp the embroidery rope. The push-drive mechanism drives the rope clamping assembly to move backward. During this process, the drive motor can drive the downward swing arm 58 to swing as needed to drive the lifting seat 52 to move, thereby driving the rope clamping assembly to move. Through the movement of the rope clamping assembly, the rope bundle can be tensioned or released.

[0048] When the rope end picking device in this utility model is used for joining and knotting ropes in embroidery devices, such as... Figure 5 , Figure 6 and Figure 7 As shown, a guide structure is required for assistance, and it is used in conjunction with a rope-changing mechanism that can move the rope head. The translation of the rope-changing mechanism moves the corresponding rope head to be picked up by the rope head picking device to a position where it can be picked up. Each rope head to be picked up has a corresponding guide structure below it. The guide structure consists of a lower rope passage 35 through which the embroidery rope passes and an upper embroidery rope passage through which the rope to be picked up passes. The rope head picking device picks up the two rope heads between the lower rope passage and the upper embroidery rope passage, as shown. Figure 5 and Figure 6As shown, the embroidery cord is dragged along a set direction. After passing through the lower cord passage, it turns and moves. After the embroidery cord passes through the upper cord passage, it turns and moves. The lower and upper cord passages limit the two cords to converge at the passage, forming a cord bundle with two cords between the cord end picking device and the guide structure. Then, a knot is tied at the cord bundle using a knotting structure in the prior art to achieve cord connection. When used in the field of cord replacement and connection embroidery, a cord cutting device is also required to cut the embroidery cord to produce a cord end. The specific structure of the knotting structure can refer to the eagle beak knotting mechanism, such as CN209865294U or CN217994884U; or the soft cord knotting device disclosed in CN114802874B. This method allows for continuous automatic cord splicing in monochrome embroidery and the use of a monochrome cord output mechanism for multi-color cord embroidery. It avoids leaving multiple loosely fixed cord ends in the pattern, and the monochrome cord output mechanism is small in size, occupying little space in front of the machine head and causing minimal obstruction. This makes cord threading easier and allows for easier integration with other embroidery mechanisms. Furthermore, during continuous embroidery, the positions of the monochrome cord output mechanism and the embroidery needle do not need adjustment. Cord replacement does not require repositioning the embroidery position, resulting in uniform stitch distribution and high-quality embroidery. This invention is applicable to the modification of existing monochrome cord embroidery mechanisms.

[0049] In this invention, the embroidery cord (BB) is the cord currently being used for embroidery, and the embroidery cord end is the corresponding cord end that is connected to the embroidery fabric when the embroidery cord is cut. The embroidery cord to be embroidered (AA) is the cord that is set on the thread feeder and is not used for embroidery. The cord end to be connected is the end of the cord to be embroidered that is waiting to be connected to the embroidery device by knotting. The cord bundle (AA, BB) is the point where the cord ends of the cords with the embroidery cord (BB) and the cord ends of the cord to be embroidered (AA) are pinched together.

[0050] One possible structure for the rope-changing mechanism is as follows: Figure 5 As shown, the rope changing device 2 includes a movable frame 21 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.

[0051] 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. The movement of the synchronous belt drives the movable frame 21 to slide back and forth along the guide rail. The rope head positioning structure is as follows: 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 head of the embroidery rope.

[0052] 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 rope end picking device for picking up a rope end, characterized in that The rope end picking device (5) includes a position-adjustable rope clamping assembly. The rope clamping assembly includes an active clamping arm (53) and two driven clamping arms (54) located on the same side of the active clamping arm (53) and coaxially. The active clamping arm (53) and the driven clamping arms (54) are driven by a gear pair to achieve synchronous movement. An elastic element is provided between the driven clamping arms (54) and the active clamping arm (53) to automatically close the rope clamping opening of the rope clamping assembly. The rope clamping drive mechanism controls the two rope clamping openings to open synchronously by driving the active clamping arm (53).

2. The grommet pickup device of claim 1, wherein, The rope end picking device (5) also includes a slidably mounted rope clamping base (51). The rope clamping base (51) can move forward and backward under the action of the first driving mechanism. The rope clamping assembly is disposed on the rope clamping base (51), and the rope clamping assembly can reciprocate in a direction perpendicular to the movement direction of the rope clamping base (51).

3. The grommet pickup device of claim 2, wherein, The rope clamping base (51) is provided with a sliding lifting seat (52) and a fixed motor (510). A downward pressure swing arm (58) is installed on the output shaft of the motor (510). The downward pressure swing arm (58) presses against one end of the lifting seat (52). The other end of the lifting seat (52) is provided with an elastic reset member (59). The lifting seat (52) and the elastic reset member (59) cooperate to make the lifting seat (52) reciprocate.

4. The grommet pickup device of claim 2, wherein, The rope clamping drive mechanism is a push-drive mechanism that is fixedly installed on the rope clamping base (51).

5. The grommet pickup device of claim 4, wherein, The pushing drive mechanism includes a cylinder (520) connected to the rope clamping base (51) and a drive arm (57) connected to the cylinder (520). The active clamping arm (53) is provided with an arm rod (56) that works in abutment with the drive arm (57).

6. The grommet pickup device of claim 1, wherein, The gear pair is in a state of intermittent meshing.

7. The grommet pickup device of claim 1, wherein, The elastic element is a tension spring (55).

8. The twine picking device of claim 1, wherein, The clamping surfaces of the active clamping arm (53) and the driven clamping arm (54) have anti-slip patterns.

9. The grommet pickup device of claim 1, wherein, The first drive mechanism (6) is a synchronous belt drive mechanism, and the rope clamping base (51) is connected to the synchronous belt of the synchronous belt drive mechanism.

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