Automatic yarn fixing mechanism

Abstract

The utility model provides an automatic yarn fixing mechanism which solves the problems of yarn unhooking and the like and comprises a yarn fixing support, a needle cylinder is fixedly installed at the upper end of the yarn fixing support, the needle cylinder is provided with a looping assembly surrounding in the circumferential direction, and a circumferential driving assembly linked with the looping assembly is installed between the needle cylinder and the yarn fixing support. A rotatable yarn fixing assembly is installed on the yarn fixing support. The yarn fixing device has the advantages of good yarn fixing effect, stable structure and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of textile equipment, and particularly relates to an automatic yarn fixing mechanism. Background Art

[0002] Weft knitting generally forms a fabric by using latch needles. When the latch needles move up and down along the triangular track, loops are formed due to the opening and closing of the latch needles. The main mechanisms of a weft knitting machine include: a yarn feeding or let-off mechanism that unwinds the yarn from the yarn bobbin or warp beam and feeds it into the knitting area; a loop-forming mechanism that weaves the yarn into loops and interlaces them to form a fabric; a take-up and winding mechanism that draws out the newly formed fabric from the knitting area and forms a certain form of package; a transmission mechanism that transmits power through the main shaft to each mechanism to enable the coordinated operation of each mechanism; and a needle selection mechanism that controls the knitting according to the pattern requirements, enabling it to perform loop formation, tuck stitch, or float stitch knitting. However, the existing weft knitting devices lack means for fixing the yarn, and the yarn is prone to unhooking during take-up and winding.

[0003] To solve the deficiencies of the existing technology, people have conducted long-term explorations and proposed various solutions. For example, a Chinese patent document discloses a device and method for automatically loading and unloading yarn on a fixed yarn rack of a weft knitting circular machine [CN202211547144.X], which includes: a weft knitting circular machine, a central control system, a yarn rack, and a transportation device; the central control system receives orders, distributes yarn according to the order information, and identifies the working state of the weft knitting circular machine; the central control system schedules the transportation device to deliver the yarn to a fixed position. The transportation device identifies the yarn position number of the yarn rack through the RFID identification module on the robotic arm, places the yarn on the corresponding yarn position, and feeds back the information to the central control system; the central control system receives the information fed back by the transportation device and controls the rotation and stop of the yarn rack until the yarn loading is completed; when the central control system detects that the weft knitting circular machine has completed its work, it schedules the transportation device and controls the rotation and stop of the yarn rack to unload the yarn bobbins on the yarn rack.

[0004] The above solution solves the problem of lack of guidance for weft knitting yarn to a certain extent, but there are still many deficiencies in this solution. For example, the yarn is prone to unhooking during yarn guiding. Summary of the Invention

[0005] The purpose of the utility model is to provide an automatic yarn fixing mechanism with reasonable design and effective prevention of yarn unhooking for the above problems.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme: an automatic yarn fixing mechanism includes a yarn fixing bracket, a needle cylinder is fixedly installed at the upper end of the yarn fixing bracket, the needle cylinder has a loop-forming component surrounding it circumferentially, a circumferential driving component linked to the loop-forming component is installed between the needle cylinder and the yarn fixing bracket, and a rotatable yarn fixing component is installed on the yarn fixing bracket.

[0007] In the above-mentioned automatic yarn fixing mechanism, the yarn fixing bracket includes a vertically arranged support rod, the upper end of the support rod is connected to a transfer plate, and the needle cylinder is locked and fixed on the transfer plate.

[0008] In the above-mentioned automatic yarn fixing mechanism, the needle cylinder comprises a main cylinder body mounted on the adapter plate, and a threading groove for movable assembly of the loop forming assembly is provided on the main cylinder body.

[0009] In the above-mentioned automatic yarn fixing mechanism, the loop forming component includes a hook body which is laterally slidably installed in the threading groove, a hook needle which extends obliquely upward is arranged at the end of the hook body, a pulling groove is arranged on the hook needle, a push plate is vertically slidably installed in the threading groove, and a push groove opposite to the pulling groove is opened on the side of the push plate.

[0010] In the above-mentioned automatic yarn fixing mechanism, the circumferential driving assembly includes a driving ring rotatably mounted on the inner side of the syringe circumference, a fluctuating surface is provided on the side of the driving ring opposite to the syringe, the hook needle and the push plate are connected with a driving block pressed against the fluctuating surface, and the driving ring is meshed with the driving motor for transmission through a driving gear and a driving gear ring.

[0011] In the above-mentioned automatic yarn fixing mechanism, a yarn fixing disc is rotatably mounted on the yarn fixing bracket, a lifting assembly and a rotating assembly are arranged between the yarn fixing disc and the yarn fixing bracket, and the yarn fixing assembly is mounted on the yarn fixing disc.

[0012] In the above-mentioned automatic yarn fixing mechanism, the lifting assembly includes a lifting cylinder, the telescopic end of the lifting cylinder faces upward and is connected to a push vertical plate, a push frame is installed on the top of the push vertical plate, and the push frame is in contact with the yarn fixing disk.

[0013] In the above-mentioned automatic yarn fixing mechanism, the rotating assembly includes a servo motor, and the servo motor is drivingly connected to the yarn fixing disk through a spline shaft and a spline sleeve.

[0014] In the above-mentioned automatic yarn fixing mechanism, the yarn fixing assembly comprises a yarn fixing needle installed on the yarn fixing disk, and a yarn fixing hole is formed at the end of the yarn fixing needle.

[0015] In the above-mentioned automatic yarn fixing mechanism, a limit ring is installed on the upper end of the yarn fixing bracket, and the limit ring is arranged in a centrally symmetrical manner relative to the yarn fixing bracket.

[0016] Compared with the existing technology, the advantages of the utility model are: the yarn fixing component can be rotated relative to the yarn fixing bracket to adjust its orientation, which can prevent the yarn from being unhooked during the pulling process; the loop forming component drives the yarn to be hooked and looped, and the circumferential drive component ensures its transmission synchronization; the lifting component and the rotating component can drive the yarn fixing disk to lift or rotate, thereby meeting different yarn pulling and guiding requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 is a schematic structural view of another perspective of the present utility model;

[0019] Figure 3 is a partial enlarged view of the present utility model;

[0020] Figure 4 is a schematic structural view of the loop-forming assembly of the present utility model;

[0021] In the figure, there are a yarn-fixing bracket 1, a support rod 11, a transfer disk 12, a limiting ring 13, a needle cylinder 2, a main cylinder body 21, a thread passing groove 22, a loop-forming assembly 3, a hook body 31, a latch needle 32, a pulling groove 33, a push plate 34, a push groove 35, a circumferential driving assembly 4, a driving ring 41, a wave surface 42, a driving block 43, a yarn-fixing assembly 5, a yarn-fixing needle 51, a yarn-fixing hole 52, a yarn-fixing disk 6, a lifting assembly 7, a lifting cylinder 71, a pushing vertical plate 72, a pushing frame 73, a rotating assembly 8, a servo motor 81, a spline shaft 82, and a spline shaft sleeve 83. Detailed implementation manners

[0022] The following further describes the present utility model in detail with reference to the accompanying drawings and specific implementation manners.

[0023] As Figures 1-4 shown, an automatic yarn-fixing mechanism includes a yarn-fixing bracket 1 assembled and connected with a corresponding yarn guiding system. Similar to a conventional weft knitting device, a needle cylinder 2 is fixedly installed at the upper end of the yarn-fixing bracket 1 in this embodiment, and the needle cylinder 2 has a loop-forming assembly 3 that guides the yarn to form a weft knitted fabric along the circumferential direction. Since the needle cylinder 2 adopts a fixed structure, in order to ensure the moving effect of the loop-forming assembly 3, a circumferential driving assembly 4 linked with the loop-forming assembly 3 is installed between the needle cylinder 2 and the yarn-fixing bracket 1. In this embodiment, in order to prevent the yarn from being unhooked, a rotatable yarn-fixing assembly 5 is installed on the yarn-fixing bracket 1, and when the yarn is introduced into the loop-forming assembly 3, the yarn-fixing assembly 5 performs limit guiding.

[0024] Specifically, since the central structure of the yarn-fixing bracket 1 needs to be kept fixed, the yarn-fixing bracket 1 includes a support rod 11 vertically arranged at the center. The upper end of the support rod 11 is connected with a transfer disk 12, and the needle cylinder 2 is locked and fixed on the transfer disk 12. The needle cylinder 2 and the transfer disk 12 are synchronously fixed relative to the support rod 11.

[0025] In-depth, the needle cylinder 2 is integrally in a cylindrical shape and includes a main cylinder body 21 installed on the transfer disk 12. A thread passing groove 22 for the movable assembly of the loop-forming assembly 3 is formed on the main cylinder body 21. When the yarn is guided into the thread passing groove 22, the yarn is in a tensioned state.

[0026] It can be seen that, similar to the existing loop forming structure, the loop forming assembly 3 in this embodiment includes a hook body 31 slidably installed in the threading groove 22, a hook needle 32 extending obliquely upward is arranged at the end of the hook body 31, and a pulling groove 33 is arranged on the hook needle 32. A push plate 34 is vertically slidably installed in the threading groove 22, and a push groove 35 opposite to the pulling groove 33 is opened on the side of the push plate 34. Under the driving action of the circumferential driving assembly 4, the hook body 31 slides horizontally and is pushed by the hook needle 32, and the push groove 35 on the side of the push plate 34 also pushes the yarn to slide, thereby realizing the pulling of the yarn.

[0027] Obviously, the circumferential drive assembly 4 includes a drive ring 41 rotatably mounted on the inner side of the syringe 2 in the circumferential direction, a wave surface 42 is provided on the side of the drive ring 41 opposite to the syringe 2, the hook needle 32 and the push plate 34 are connected to a drive block 43 pressed against the wave surface 42, and the drive ring 41 is meshed with the drive motor through the drive gear and the drive gear ring. The drive ring 41 rotates circumferentially, and the drive block 43 cooperates with the corresponding guide surface to squeeze and push.

[0028] Preferably, a yarn fixing disc 6 is rotatably mounted on the yarn fixing bracket 1, a lifting assembly 7 and a rotating assembly 8 are arranged between the yarn fixing disc 6 and the yarn fixing bracket 1, and the yarn fixing assembly 5 is mounted on the yarn fixing disc 6. When the yarn fixing disc 6 moves, the yarn fixing assembly 5 also moves synchronously.

[0029] Obviously, the present embodiment adopts pneumatic method to drive the yarn fixing plate 6 to move up and down, and the lifting assembly 7 includes a lifting cylinder 71, the telescopic end of the lifting cylinder 71 is upward and connected to a push vertical plate 72, and a push frame 73 is installed on the top of the push vertical plate, and the push frame 73 is in contact with the yarn fixing plate 6. When the yarn fixing plate 6 rises as a whole, the yarn fixing assembly 5 drives the yarn to rise.

[0030] In addition, the rotation angle of the rotating assembly 8 is limited, and the servo motor 81 is connected to the yarn fixing disc 6 through a spline shaft 82 and a spline sleeve 83. The servo motor 81 controls the forward and reverse rotation and the rotation angle of the yarn fixing disc 6, and cooperates with other speed-changing transmission structures to achieve fine adjustment of the angle of the yarn fixing disc 6.

[0031] Meanwhile, the yarn fixing assembly 5 comprises a yarn fixing needle 51 mounted on the yarn fixing disc 6, and a yarn fixing hole 52 is provided at the end of the yarn fixing needle 51. The yarn fixing needle 51 is in the shape of an elongated strip, and a flat portion is left at the end for the yarn in the yarn fixing hole 52 to pass through.

[0032] It can be seen that a limit ring 13 is installed on the upper end of the yarn fixing bracket 1, and the limit ring 13 is arranged symmetrically with respect to the yarn fixing bracket 1. The limit ring 13 performs secondary limit on the yarn. When the yarn passes through the yarn fixing component 5 and rises or rotates, the limit ring 13 limits the yarn to prevent the yarn from interfering.

[0033] In summary, the principle of this embodiment is as follows: The syringe barrel 2 is fixedly structured relative to the yarn-fixing bracket 1. Among them, the loop-forming assembly 3 guides the yarn to form loops, the circumferential driving assembly 4 provides driving force for the loop-forming assembly 3, and at the same time, the yarn-fixing assembly 5 is further limited during loop formation by the yarn-fixing assembly 5.

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways of substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0035] Although terms such as yarn-fixing bracket 1, support rod 11, adapter plate 12, limiting ring 13, syringe barrel 2, main barrel body 21, wire groove 22, lifting frame 23, guiding column 24, loop-forming assembly 3, hook body 31, hook needle 32, pulling groove 33, push plate 34, push groove 35, circumferential driving assembly 4, driving ring 41, wave surface 42, driving block 43, yarn-fixing assembly 5, yarn-fixing needle 51, yarn-fixing hole 52, yarn-fixing disk 6, lifting assembly 7, lifting cylinder 71, pushing vertical plate 72, pushing frame 73, rotating assembly 8, servo motor 81, spline shaft 82, spline shaft sleeve 83 are used more frequently in this article, the possibility of using other terms is not excluded. Using these terms is only for more conveniently describing and explaining the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. An automatic yarn fixing mechanism, comprising a yarn fixing bracket (1), wherein a needle cylinder (2) is fixedly installed at the upper end of the yarn fixing bracket (1), and it is characterized in that, The described syringe barrel (2) has a circumferentially surrounding looping component (3), and a circumferential drive component (4) linked to the looping component (3) is installed between the syringe barrel (2) and the yarn fixing bracket (1). A rotatable yarn fixing component (5) is installed on the yarn fixing bracket (1).

2. The automatic yarn fixing mechanism according to claim 1, characterized in that, The described yarn fixing bracket (1) includes a vertically arranged support rod (11), and a transfer disk (12) is connected to the upper end of the support rod (11). The syringe barrel (2) is locked and fixed on the transfer disk (12).

3. The automatic yarn fixing mechanism according to claim 2, characterized in that, The described syringe barrel (2) includes a main barrel body (21) installed on the transfer disk (12), and a thread passing groove (22) for the looping component (3) to be movably assembled is opened on the main barrel body (21).

4. The automatic yarn fixing mechanism according to claim 3, characterized in that, The described looping component (3) includes a hook body (31) slidably installed horizontally in the thread passing groove (22). An upwardly inclined hook needle (32) is provided at the end of the hook body (31). A pulling groove (33) is provided on the hook needle (32). A push plate (34) is slidably installed vertically in the thread passing groove (22), and a push groove (35) opposite to the pulling groove (33) is opened on the side of the push plate (34).

5. The automatic yarn fixing mechanism according to claim 4, wherein, The described circumferential drive component (4) includes a drive ring (41) rotatably installed on the inner side of the circumferential direction of the syringe barrel (2). A wave surface (42) is provided on the side of the drive ring (41) opposite to the syringe barrel (2). The hook needle (32) and the push plate (34) are connected with a drive block (43) pressing against the wave surface (42). The drive ring (41) is in meshing transmission with a drive motor through a drive gear and a drive gear ring.

6. The automatic yarn fixing mechanism according to claim 1, characterized in that A yarn fixing disk (6) is rotatably installed on the yarn fixing bracket (1). A lifting component (7) and a rotating component (8) are provided between the yarn fixing disk (6) and the yarn fixing bracket (1). The yarn fixing component (5) is installed on the yarn fixing disk (6).

7. An automatic yarn fixing mechanism according to claim 6, characterized in that, The described lifting component (7) includes a lifting cylinder (71). The telescopic end of the lifting cylinder (71) faces upward and is connected with a pushing vertical plate (72). A pushing frame (73) is installed at the top of the pushing vertical plate. The pushing frame (73) contacts the yarn fixing disk (6).

8. An automatic yarn fixing mechanism according to claim 6, characterized in that, The described rotating component (8) includes a servo motor (81). The servo motor (81) is in transmission connection with the yarn fixing disk (6) through a spline shaft (82) and a spline shaft sleeve (83).

9. The automatic yarn fixing mechanism according to claim 6, wherein, The described yarn fixing component (5) includes a yarn fixing needle (51) installed on the yarn fixing disk (6). A yarn fixing hole (52) is opened at the end of the yarn fixing needle (51).

10. The automatic yarn fixing mechanism according to claim 1, characterized in that, A limiting ring (13) is installed at the upper end of the yarn fixing bracket (1). The limiting ring (13) is arranged in central symmetry relative to the yarn fixing bracket (1).

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