Yarn threading device and skein winder

Abstract

This disclosure relates to a yarn threading device and a yarn winding machine. The yarn threading device includes a frame and a yarn guiding unit mounted on the frame. The yarn guiding unit includes a yarn guiding wheel, a tensioner, and an infeed component. The yarn guiding wheel is rotatably connected to the frame and has a yarn guiding groove and a helical threaded groove. The threaded groove extends along the axial direction of the yarn guiding wheel and communicates with the yarn guiding groove. The tensioner has a slit for the yarn to pass through. The infeed component is located on at least one side of the tensioner and has an inclined guiding surface. The yarn can slide down the guiding surface into the slit and then pass through the slit and the yarn guiding groove. This yarn threading device, by providing a threaded groove on the yarn guiding wheel that communicates with the yarn guiding groove, eliminates the need to accurately place the yarn into the yarn guiding groove during threading. The yarn only needs to be placed on the outer surface of the yarn guiding wheel, and the threaded groove guides the yarn into the yarn guiding groove during the rotation of the yarn guiding wheel, thereby reducing the operational precision required for yarn threading.

Description

Technical Field

[0001] This disclosure relates to the field of textile technology, specifically to a yarn threading device and a yarn winding machine. Background Technology

[0002] In the textile industry, the yarn winding machine is a device that rewinds yarn into cones, and it is widely used in yarn finishing, storage, and subsequent weaving and dyeing processes. However, in actual production, operators encounter problems such as cumbersome steps, complex movements, and long processing times when threading yarn, which can easily lead to errors and threading failures, thereby increasing labor intensity and reducing production efficiency. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this disclosure provides the following technical solution:

[0004] According to a first aspect of this disclosure, a yarn threading device is provided, including a frame and a yarn guiding unit disposed on the frame, wherein the yarn guiding unit includes:

[0005] The yarn guide wheel is configured to be rotatably connected to the frame. The yarn guide wheel is provided with a yarn guide groove, and the outer wall of the yarn guide wheel is also provided with a spiral threaded groove. The threaded groove is configured to extend along the axial direction of the yarn guide wheel to communicate with the yarn guide groove.

[0006] A tensioner having a slit through which the yarn passes;

[0007] An inlet component is configured to be disposed on at least one side of the tensioner, the inlet component being configured to have an inclined guide surface, and the yarn being configured to slide down the guide surface into the gap.

[0008] The yarn is configured to pass through a slit and a yarn guide groove.

[0009] In one embodiment of this disclosure, guide brackets are respectively provided at opposite ends of the tensioner along the extension direction of the yarn, and guide brackets are provided with guide grooves aligned with the gap; the inlet assembly is configured to have two downwardly extending guide ends, the two guide ends are configured to extend to positions adjacent to the corresponding guide grooves, and the yarn is configured to slide down the guide surface into the guide grooves.

[0010] In one embodiment of this disclosure, the import component is a guide rod, which is configured to have a vertical section that is fixed to the side wall of the guide bracket; the guide rod also includes an inclined section connected to the vertical section and gradually tilting upward.

[0011] In one embodiment of this disclosure, an infrared detection component is provided on the guide bracket, the infrared detection component including a transmitter and a receiver; the yarn is configured to pass through the area between the transmitter and the receiver.

[0012] In one embodiment of this disclosure, the infrared detection component is configured to be disposed on a guide bracket located downstream of the tensioner.

[0013] In one embodiment of this disclosure, the yarn guide wheel is configured to extend axially to form a columnar structure, and the threaded groove is configured to be disposed on the yarn guide wheel and located on one side of the yarn guide groove.

[0014] In one embodiment of this disclosure, at least two yarn guide wheels are provided, wherein at least one yarn guide wheel is located upstream of the tensioner; and at least one yarn guide wheel is located downstream of the tensioner.

[0015] In one embodiment of this disclosure, the yarn guiding unit includes a mounting bracket, and the yarn guiding wheel and tensioner are configured to be mounted at intervals on the mounting bracket.

[0016] According to a second aspect of this disclosure, a yarn winding machine is also provided, including a winding device and the aforementioned yarn threading device; the yarn passing through the yarn threading device is configured to be wound on the winding device.

[0017] In one embodiment of this disclosure, the winding device includes a grooved cylinder and a winding tube. The grooved cylinder is mounted on the top of the frame and is configured to be connected to a drive device. The winding tube is in contact with the outer wall of the grooved cylinder and is configured to rotate relative to the grooved cylinder by friction when the grooved cylinder rotates.

[0018] The yarn threading device and yarn winding machine disclosed herein provide a threaded groove on the yarn guide wheel that communicates with the yarn guide groove. This allows the operator to thread the yarn without accurately placing it into the yarn guide groove. Instead, the operator only needs to place the yarn on the outer surface of the yarn guide wheel. As the yarn guide wheel rotates, the threaded groove guides the yarn along a spiral path into the yarn guide groove, thereby reducing the operational precision required for the yarn threading process.

[0019] Furthermore, by setting up an infeeding device, operators no longer need to precisely place the yarn into the tensioner's gap when threading the yarn. They only need to place the yarn on the guide surface of the infeeding device, and the yarn can be slid into the tensioner's gap by relying on the guide surface. This reduces the number of steps in the threading process, avoids threading failures caused by yarn misalignment, and improves the success rate and efficiency of threading.

[0020] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0022] Figure 1 This is a schematic diagram of the structure of a yarn winding machine according to an embodiment of this disclosure;

[0023] Figure 2 This is a public announcement Figure 1 A magnified view of a portion of point A.

[0024] Figures 1 to 2 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0025] 1. Frame; 2. Yarn guide roller; 21. Yarn guide groove; 22. Thread groove; 3. Tensioner; 31. Gap; 4. Inlet assembly; 41. Vertical section; 42. Inclined section; 5. Yarn; 6. Guide bracket; 61. Guide groove; 7. Infrared detection assembly; 8. Mounting bracket; 9. Groove cylinder; 10. Yarn winding tube; 11. Drive device; 12. Cradle. Detailed Implementation

[0026] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0030] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0031] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0032] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0033] This disclosure relates to a yarn threading device and a yarn winding machine. The yarn threading device includes a frame and a yarn guiding unit mounted on the frame. The yarn guiding unit includes a yarn guiding wheel, a tensioner, and an inlet assembly. The yarn guiding wheel is rotatably connected to the frame and is provided with a yarn guiding groove and a spiral threaded groove. The threaded groove extends along the axial direction of the yarn guiding wheel to communicate with the yarn guiding groove. The tensioner is provided with a slit for the yarn to pass through. The inlet assembly is located on at least one side of the tensioner and has an inclined guiding surface. The yarn can slide down the guiding surface into the slit and pass through the slit and the yarn guiding groove.

[0034] The yarn threading device and yarn winding machine disclosed herein provide a threaded groove on the yarn guide wheel that communicates with the yarn guide groove. This allows the operator to thread the yarn without accurately placing it into the yarn guide groove. Instead, the operator only needs to place the yarn on the outer surface of the yarn guide wheel. As the yarn guide wheel rotates, the threaded groove guides the yarn along a spiral path into the yarn guide groove, thereby reducing the operational precision required for the yarn threading process.

[0035] Furthermore, by incorporating an infeed device, operators no longer need to pry open the tensioner to precisely place the yarn into its slots during yarn threading. Instead, they simply place the yarn on the guide surface of the infeed device, allowing it to slide into the tensioner's slots. This reduces the number of steps involved in the yarn threading process, prevents threading failures due to yarn misalignment, and improves the success rate and efficiency of yarn threading.

[0036] For ease of understanding, please refer to the following: Figures 1 to 2 The following describes in detail the specific structure and working principle of a yarn threading device and a yarn winding machine disclosed herein, with reference to an embodiment.

[0037] refer to Figure 1 and Figure 2This disclosure provides a yarn threading device, including a frame and a yarn guiding unit disposed on the frame. The yarn guiding unit includes a yarn guiding wheel 2, a tensioner 3, and an infeed component 4. The yarn guiding wheel 2 is rotatably connected to the frame and has a yarn guiding groove 21. The outer wall of the yarn guiding wheel 2 also has a spiral threaded groove 22, which extends along the axial direction of the yarn guiding wheel 2 to communicate with the yarn guiding groove 21. The tensioner 3 has a slit 31 for the yarn 5 to pass through. The infeed component 4 is disposed on at least one side of the tensioner 3 and has an inclined guiding surface, through which the yarn 5 can slide into the slit 31. The yarn 5 is configured to pass through the slit 31 and the yarn guiding groove 21.

[0038] Specifically, traditional yarn threading operations require operators to precisely place the yarn 5 into the guide groove 21 of the guide wheel 2. Even slight deviations can cause the yarn 5 to slip or become sluggish, making the threading operation difficult and time-consuming. However, this disclosure, by providing a spiral groove 22 on the outer wall of the guide wheel 2 that communicates with the guide groove 21, eliminates the need for precise alignment during threading. Operators can simply place the yarn 5 anywhere on the outer surface of the guide wheel 2. Under the traction of the equipment, the yarn 5 will enter any position in the spiral groove 22 and gradually move along the spiral path towards the guide groove 21, ultimately entering it. This significantly reduces the precision required for yarn threading.

[0039] Furthermore, in the traditional yarn threading process, the operator needs to open the slit 31 of the tensioner 3 and precisely thread the fine yarn 5 through it, which is difficult to operate, especially when the yarn 5 is thin, which can easily lead to breakage. This requires a high level of operator skill. However, this disclosure, by setting an inlet component 4 on the side of the tensioner 3, allows the operator to simply place the yarn 5 on the guide surface of the inlet component 4. The yarn 5 will then slide naturally into the slit 31 under the combined action of its own weight and traction force, thereby reducing the difficulty of the yarn threading process and improving the efficiency of yarn threading.

[0040] In actual operation, the operator first leads the yarn 5 to be threaded from the yarn tube and places it at any position on the outer wall of the guide wheel 2. Under the traction, the yarn 5 enters the threaded groove 22 and, as the winding tube 10 rotates, automatically slides along the spiral path towards the guide groove 21, finally being smoothly guided into the guide groove 21. After the operator leads the yarn 5 out of the guide groove 21, it overlaps on the inclined guide surface of the guiding component 4, and the end of the yarn 5 is fixed on the winding tube 10. When the winding tube 10 starts to rotate, under the combined action of traction and gravity, the yarn 5 slides precisely into the gap 31 of the tensioner 3 along the guide surface, thus completing the yarn winding operation.

[0041] refer to Figure 1 and Figure 2In one embodiment of this disclosure, guide brackets 6 are respectively provided at opposite ends of tensioner 3 along the extension direction of yarn 5, and guide grooves 61 aligned with slit 31 are provided on guide brackets 6; the inlet assembly 4 has two downwardly extending guide ends, which are configured to extend to positions adjacent to the corresponding guide grooves 61, and yarn 5 can slide down the guide surface into the guide grooves 61.

[0042] Specifically, guide grooves 61 aligned with the gap 31 are provided on the guide supports 6 upstream and downstream of the tensioner 3. This allows the yarn 5 to be positioned by the guide groove 61 of the upstream guide support 6 before passing through the tensioner 3, ensuring that it enters the gap 31 of the tensioner 3 at the correct angle and height, preventing the yarn 5 from deviating or slipping, thereby ensuring the uniformity and reliability of tension adjustment. The guide groove 61 of the guide support 6 downstream of the tensioner 3 can further constrain the exit path of the yarn 5, preventing it from deviating during the traction process, which is conducive to the smooth transition of the yarn 5 to the subsequent winding device, thereby improving the overall operational stability.

[0043] Meanwhile, the inlet component 4 has two downward-extending guide ends, which are located near the guide groove 61 of the upstream guide bracket 6, with their top ends connected to the guide surface of the inclined guide bracket 6. During the yarn threading process, the operator only needs to place the yarn 5 on the guide surface, and the yarn 5 will naturally slide down along the guide surface under its own weight and traction force, and be guided into the guide groove 61 through the guide ends. Since the guide ends correspond to the guide groove 61, the yarn 5 can smoothly enter the tensioner 3's gap 31 area, achieving efficient yarn threading.

[0044] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the guide component 4 is a guide rod, which is configured to have a vertical section 41, which is configured to be fixed to the side wall of the guide bracket 6; the guide rod also includes an inclined section 42 connected to the vertical section 41 and gradually inclined upward.

[0045] Specifically, the guide component 4 of this disclosure can adopt a guide rod structure, which includes two vertical sections 41 and one inclined section 42. The vertical sections 41 are fixedly connected to the side wall of the guide bracket 6, providing stable support for the entire guide rod and ensuring that it remains in a fixed position during operation. An inclined section 42 that gradually slopes upward extends from the upper end of the vertical sections 41, and the inclined section 42 as a whole forms a smooth and continuous guide surface.

[0046] Furthermore, due to the presence of the guide rod, no precise manual alignment is required during the yarn threading process. The operator only needs to place the yarn 5 at any position on the inclined section 42, and the automatic guiding function of the guide surface will enable the yarn 5 to connect with the tensioner 3's slot 31. This not only reduces the difficulty of yarn threading and improves operational efficiency, but also avoids damage to the yarn 5 caused by improper force or positional deviation when manually threading it into the slot 31.

[0047] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, an infrared detection component 7 is provided on the guide bracket 6, the infrared detection component 7 including a transmitter and a receiver; the yarn 5 is configured to pass through the area between the transmitter and the receiver.

[0048] Specifically, in order to achieve real-time detection of the state of yarn 5, this disclosure provides an infrared detection component 7 on the guide bracket 6, which includes a transmitter and a receiver. After passing through the tensioner 3, yarn 5 is configured to pass through the area between the transmitter and the receiver.

[0049] Furthermore, when yarn 5 passes normally through the area between the infrared transmitter and receiver, the infrared beam can be stably transmitted from the transmitter to the receiver. At this time, the yarn winding machine is running normally. Once a yarn breakage occurs, the receiver cannot receive a normal signal and will send a stop signal to the control terminal of the yarn winding machine. At this time, the yarn winding machine stops rotating so that the operator can handle it in time.

[0050] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the infrared detection component 7 is configured to be disposed on the guide bracket 6 located downstream of the tensioner 3.

[0051] Specifically, before passing through the tensioner 3, the yarn 5 is not fully straightened. If detection is performed at this time, the infrared beam may be unstable due to obstruction, leading to signal fluctuations and false alarms. However, after passing through the tensioner 3, the tension of the yarn 5 is effectively adjusted, the yarn is tightened, its shape tends to be straight, and its running trajectory is more stable. Therefore, placing the infrared detection component 7 on the guide bracket 6 downstream of the tensioner 3 ensures that the yarn 5 passes through the detection area between the transmitter and receiver in a uniform and taut manner, ensuring that the infrared beam is stably blocked or clearly interrupted, thereby achieving accurate identification of yarn breakage anomalies.

[0052] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the yarn guide wheel 2 is configured to extend in its axial direction to form a columnar structure, and the threaded groove 22 is configured to be disposed on the yarn guide wheel 2 and located on one side of the yarn guide groove 21.

[0053] Specifically, the axially extended columnar structure of the guide wheel 2 increases the contact area between the yarn 5 and the surface of the guide wheel 2, making the yarn 5 more stable during rapid movement. Simultaneously, to simplify the yarn threading process and improve operational error tolerance, this disclosure also provides a threaded groove 22 on the guide wheel 2, positioned on one side of the guide groove 21. In traditional yarn threading methods, operators are required to place the yarn 5 very precisely into the guide groove 21, which can easily lead to threading failure. However, by providing the threaded groove 22 on the guide wheel 2, even if the initial placement of the yarn 5 is not accurate, the automatic guiding function of the threaded groove 22 allows the yarn 5 to automatically slide into the guide groove 21. In other words, the operator only needs to place the yarn 5 at any position on the surface of the guide wheel 2 to complete the threading step, greatly simplifying the operation process and saving threading time.

[0054] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, at least two guide wheels 2 are provided, wherein at least one guide wheel 2 is located upstream of the tensioner 3; and at least one guide wheel 2 is located downstream of the tensioner 3.

[0055] Specifically, during yarn threading, yarn 5 first passes through the guide roller 2 located upstream of tensioner 3. The function of the guide roller 2 is to pre-guide and position the yarn 5 so that it can enter tensioner 3 at the correct angle. After the yarn 5 passes through tensioner 3, its tension has been adjusted to the range required by the process. However, due to the tension, the running direction of the yarn 5 may change. At this time, the guide roller 2 located downstream of tensioner 3 can guide and stabilize the direction of the yarn 5. It can smoothly guide the tensioned yarn 5 into the subsequent winding device, preventing problems such as uneven winding, poor forming, or yarn breakage caused by directional deviation.

[0056] refer to Figure 1 and Figure 2 In one embodiment of this disclosure, the yarn guiding unit includes a mounting bracket 8, and the yarn guiding wheel 2 and the tensioner 3 are configured to be mounted at intervals on the mounting bracket 8.

[0057] Specifically, the yarn guiding unit includes a mounting bracket 8 that extends outward in a horizontal direction and is disposed on the side wall of the frame 1. A first mounting part, a second mounting part, and a third mounting part are sequentially disposed in the extending direction of the mounting bracket 8. At least one yarn guiding wheel 2 is respectively mounted on the first mounting part and the second mounting part is rotatably connected to one end of the yarn guiding wheel 2 near the yarn guiding groove 21. The third mounting part is used to mount the tensioner 3, so that the slit 31 of the tensioner 3 can be aligned with the yarn guiding groove 21 of at least two yarn guiding wheels 2 in a straight line. This prevents the yarn 5 from being damaged when it passes through the yarn guiding groove 21 and the slit 31 due to the tilt angle between the slit 31 of the tensioner 3 and the yarn guiding groove 21 of the yarn guiding wheel 2. At the same time, it also prevents the yarn 5 from slipping out of the slit 31 of the tensioner 3.

[0058] refer to Figure 1 and Figure 2 This disclosure also discloses a yarn winding machine, including a winding device and a yarn threading device, wherein the yarn 5 passing through the yarn threading device is wound on the winding device.

[0059] Specifically, the yarn winding machine disclosed herein includes a winding device and a yarn threading device. Before winding, a yarn threading operation is required, in which the yarn 5 is passed sequentially through the guide wheel 2 and the tensioner 3. The yarn 5 is then wound onto the winding device by its rotation. Since the surface of the guide wheel 2 is provided with a spiral threaded groove 22 that communicates with the guide groove 21, the operator does not need to precisely align the yarn 5 with the guide groove 21 when threading the yarn. The yarn 5 can simply be placed at any position on the outer surface of the guide wheel 2. When the winding device is started, the yarn 5 can be automatically guided into the guide groove 21 along the threaded groove 22. In addition, the yarn threading device also includes an inlet component 4 with an inclined guide surface, located at the inlet of the tensioner 3. Therefore, when the yarn 5 passes through the tensioner 3, it is not necessary to pry open the tensioner 3. The yarn 5 can be placed on the guide surface, which allows the yarn 5 to accurately enter the gap 31 of the tensioner 3 along the guide surface during the traction process, greatly shortening the yarn threading time.

[0060] refer to Figures 1 to 2 In one embodiment of this disclosure, the winding device includes a grooved cylinder 9 and a winding tube 10. The grooved cylinder 9 is mounted on the top of the frame 1 and is configured to be connected to the drive device 11. The winding tube 10 is in contact with the outer wall of the grooved cylinder 9 and is configured to rotate relative to the grooved cylinder 9 by friction when the grooved cylinder 9 rotates.

[0061] Specifically, the grooved cylinder 9 is mounted on the top of the frame 1 and connected to the drive unit 11. The motor of the drive unit 11 drives the grooved cylinder 9 to rotate stably around its axis. The yarn winding tube 10 is mounted on the rocker arm 12, and through the elastic support and swing adjustment function of the rocker arm 12, it achieves dynamic and stable cooperation with the grooved cylinder 9. The yarn winding tube 10 is in close contact with the outer wall of the grooved cylinder 9. During the rotation of the grooved cylinder 9, the yarn tube is driven to rotate synchronously by the friction between the contact surfaces of the two, thereby realizing the continuous winding of the yarn 5, thus forming a tightly structured and orderly arranged yarn 5 on the yarn winding tube 10. Since the yarn winding tube 10 itself does not have the ability to rotate actively, its rotation depends entirely on the friction transmission with the grooved cylinder 9. Therefore, the surface of the grooved cylinder 9 has an appropriate roughness to enhance the friction, ensure stable transmission, and avoid slippage.

[0062] Furthermore, the cradle 12 is mounted on the frame 1 via a hinged structure, providing a certain degree of swing adjustment capability. This allows the cradle 12 to automatically adjust its position according to the diameter changes of the yarn winding tube 10, and to always maintain a suitable contact pressure between the yarn winding tube 10 and the grooved drum 9. In the initial stage of winding, the diameter of the yarn winding tube 10 is small, and the cradle 12 applies downward pressure to ensure that the friction is sufficient to drive the yarn winding tube 10 to rotate. As winding progresses, the diameter of the yarn winding tube 10 gradually increases, and the cradle 12 swings upward accordingly, automatically compensating for the positional changes caused by the increase in diameter. This avoids damage to the yarn 5 or overloading of the grooved drum 9 due to excessive pressure, while also preventing slippage due to insufficient pressure.

[0063] The yarn threading device and yarn winding machine disclosed herein provide a threaded groove on the yarn guide wheel that communicates with the yarn guide groove. This allows the operator to thread the yarn without accurately placing it into the yarn guide groove. Instead, the operator only needs to place the yarn on the outer surface of the yarn guide wheel. As the yarn guide wheel rotates, the threaded groove guides the yarn along a spiral path into the yarn guide groove, thereby reducing the operational precision required for the yarn threading process.

[0064] Furthermore, by incorporating an infeed device, operators no longer need to pry open the tensioner to precisely place the yarn into its gaps during yarn threading. Instead, they simply place the yarn on the guide surface of the infeed device, allowing it to slide into the tensioner's gaps. This reduces the number of steps involved in the yarn threading process, prevents threading failures due to yarn misalignment, and improves the success rate and efficiency of yarn threading.

[0065] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. A yarn-threading device, characterized in that, Includes a frame (1) and a yarn guiding unit disposed on the frame (1), wherein the yarn guiding unit includes: The yarn guide wheel (2) is configured to be rotatably connected to the frame (1). The yarn guide wheel (2) is provided with a yarn guide groove (21). The outer wall of the yarn guide wheel (2) is also provided with a spiral threaded groove (22). The threaded groove (22) is configured to extend along the axial direction of the yarn guide wheel (2) to communicate with the yarn guide groove (21). Tensioner (3), which is provided with a slit (31) through which the yarn (5) passes. An inlet component (4) is configured to be disposed on at least one side of the tensioner (3), the inlet component (4) is configured to have an inclined guide surface, and the yarn (5) is configured to be able to slide down through the guide surface into the slit (31). The yarn (5) is configured to pass through the slit (31) and the yarn guide groove (21).

2. The yarn-threading device according to claim 1, characterized in that, Along the extension direction of the yarn (5), guide brackets (6) are respectively provided at opposite ends of the tensioner (3), and guide grooves (61) aligned with the gap (31) are provided on the guide brackets (6); the inlet assembly (4) is configured to have two downwardly extending guide ends, the two guide ends are configured to extend to the position adjacent to the corresponding guide grooves (61), and the yarn (5) is configured to slide down the guide surface into the guide grooves (61).

3. The yarn-threading device according to claim 2, characterized in that, The inlet component (4) is a guide rod, which is constructed to have a vertical section (41) and the vertical section (41) is constructed to be fixed on the side wall of the guide bracket (6); the guide rod also includes an inclined section (42) connected to the vertical section (41) and gradually inclined upward.

4. The yarn-threading device according to claim 3, characterized in that, An infrared detection component (7) is provided on the guide bracket (6), the infrared detection component (7) includes a transmitter and a receiver; the yarn (5) is configured to pass through the area between the transmitter and the receiver.

5. The yarn-threading device according to claim 4, characterized in that, The infrared detection component (7) is configured to be mounted on a guide bracket (6) located downstream of the tensioner (3).

6. The yarn-threading device according to claim 1, characterized in that, The yarn guide wheel (2) is configured to extend in its axial direction to form a columnar structure, and the threaded groove (22) is configured to be disposed on the yarn guide wheel (2) and located on one side of the yarn guide groove (21).

7. The yarn-threading device according to claim 1, characterized in that, At least two guide rollers (2) are provided, wherein at least one guide roller (2) is located upstream of the tensioner (3); and at least one guide roller (2) is located downstream of the tensioner (3).

8. The yarn-threading device according to any one of claims 1 to 7, characterized in that, The yarn guiding unit includes a mounting bracket (8), and the yarn guiding wheel (2) and tensioner (3) are configured to be installed at intervals on the mounting bracket (8).

9. A yarn winding machine, characterized in that, It includes a winding device and a yarn threading device according to any one of claims 1 to 8; the yarn (5) passing through the yarn threading device is configured to be wound on the winding device.

10. The yarn winding machine according to claim 9, characterized in that, The winding device includes a grooved cylinder (9) and a winding tube (10). The grooved cylinder (9) is mounted on the top of the frame (1) and is configured to be connected to the drive device (11). The winding tube (10) is attached to the outer wall of the grooved cylinder (9) and is configured to rotate relative to the grooved cylinder (9) by friction when the grooved cylinder (9) rotates.

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