A thread tension device and a thread winding machine

Abstract

This utility model relates to a yarn tensioning device and a yarn winding machine, belonging to the field of textile machinery. A yarn tensioning device includes a frame and a first and a second yarn guide arranged vertically at intervals on the frame. A rotatable guide rod is mounted on the frame, and a third yarn guide is mounted on the guide rod. An elastic mechanism is provided between the frame and the guide rod. When the guide rod rotates relative to the frame, the third yarn guide can move relative to the first and second yarn guides. By providing an elastic mechanism between the guide rod and the frame, an elastic force is generated between the guide rod and the frame. The guide rod maintains balance under the tension of the yarn and the action of the elastic mechanism, preventing the yarn from breaking. This solves the problem in existing yarn tensioning devices where the guide structures are arranged laterally at intervals, and the tensioning part is located between two guide structures, resulting in excessive space occupation on the horizontal plane.

Description

Technical Field

[0001] This utility model relates to a yarn tensioning device and a yarn winding machine, belonging to the field of textile machinery. Background Technology

[0002] In the textile industry, cotton, polyester, and chemical fiber threads are transported in the form of spools. Therefore, freshly produced threads need to be wound onto spools to form a roll. To better and more evenly wind the threads exiting the spool onto the spool, existing technologies generally incorporate a rabbit-hair head that reciprocates linearly along the axial direction of the spool. The rabbit-hair head guides the threads during winding as it moves.

[0003] As the rabbit silk tip moves, the distance between the rabbit silk tip and the silk exit point will also change, such as... Figure 1 and Figure 2 As shown, the yarn 12 emerging from the yarn outlet 11 is guided by the rabbit wire head 13 and wound onto the yarn spool 14. When the rabbit wire head 13 is in the middle position corresponding to the middle of the yarn spool 14, the length of the yarn 12 between the yarn outlet 11 and the yarn spool 14 is relatively short. When the rabbit wire head 13 is in the end position corresponding to both ends of the yarn spool, the length of the yarn 12 between the yarn outlet 11 and the yarn spool 14 is relatively long. The yarn exit speed of the yarn outlet 11 is constant, and the rotation speed of the yarn spool 14 is also constant. The yarn exit speed of the yarn outlet 11 is generally the same as the winding speed of the yarn spool 14. Therefore, the yarn between the yarn outlet 11 and the yarn spool 14 is relatively loose when the rabbit wire head 13 is in the middle position and is tightened when the rabbit wire head 13 is in the end position. The yarn 12 is constantly tightened and loosened during the winding process onto the yarn spool 14, making it prone to breakage. Therefore, in the prior art, a tensioning device is generally provided between the yarn outlet and the rabbit wire head.

[0004] For example, Chinese utility model patent CN204939738U, with an authorization announcement date of January 6, 2016, discloses a yarn tensioning device for a warping machine. This tensioning device includes parallel and spaced-apart tensioning rollers and pressure rollers. The tensioning rollers are equipped with pulleys for the yarn to pass through, and the pressure rollers have U-shaped grooves (the pulleys and pressure rollers respectively constitute the first and second yarn guides). Furthermore, a torsion spring is provided on the tensioning rollers, and a guide rod is mounted on the torsion springs. A guide ring (i.e., the third yarn guide) is fixedly mounted on the guide rod. The yarn passes sequentially through the tensioning rollers, guide ring, and pressure rollers before being used by subsequent equipment or a yarn spool. The yarn before the tensioning rollers forms the inlet end, and the yarn after the pressure rollers forms the outlet end. During the threading process, a portion of the wire can be reserved in the tensioning device. When the rabbit wire head moves to both ends of the wire spool, the guide rod rotates under the action of the wire, overcoming the elastic force of the torsion spring, thereby shortening the wire between the tension roller and the pressure roller to adapt to the position of the rabbit wire head.

[0005] In the above technical solution, the tension roller and pressure roller are arranged laterally at intervals. To ensure that the guide rod has sufficient room to move and adapt to the yarn, the distance between the tension roller and pressure roller needs to be increased, which occupies space on the horizontal plane. In a production workshop, horizontal space is particularly important and valuable; excessive occupation of horizontal space will reduce the amount of equipment that can be arranged in the workshop. Utility Model Content

[0006] The purpose of this utility model is to provide a wire tensioning device to solve the problem that the wire guide structure of the existing wire tensioning device is arranged laterally with spacing, and the tensioning part is located between two wire guide structures, resulting in a large amount of space occupied on the horizontal plane; the purpose of this utility model is also to provide a wire winding machine to solve the above-mentioned technical problems.

[0007] To achieve the above objectives, the thread tensioning device in this utility model adopts the following technical solution: A wire tensioning device includes a frame and a first wire guide and a second wire guide arranged vertically at intervals on the frame. A wire guide rod is provided on the frame and can swing relative to the frame. A third wire guide is provided on the wire guide rod for guiding the wire led out by the first wire guide to the second wire guide. The third wire guide is located on one side laterally of the first and second wire guides. An elastic mechanism is provided between the frame and the wire guide rod for applying a force to the wire guide rod to move the third wire guide away from the first and second wire guides so that the wire is tensioned.

[0008] Furthermore, the guide rod includes a rod body and an extension section perpendicular to the end of the rod body, a third guide member is fixedly disposed at the end of the extension section away from the rod body, and the elastic mechanism is disposed at one end of the rod body away from the extension section.

[0009] Furthermore, the extension section and the main body of the elastic mechanism are located on the same side of the rod body.

[0010] Furthermore, the frame is provided with a limiting structure for limiting the extreme position of the guide rod during its swing stroke relative to the frame.

[0011] Furthermore, the frame includes a connecting plate, and the limiting structure includes a first limiting rod and a second limiting rod fixed to the connecting plate and extending horizontally, with the guide rod located between the first limiting rod and the second limiting rod.

[0012] Furthermore, position switches are respectively installed on the first and second limit rods for being triggered when the guide rod swings to a certain position.

[0013] Furthermore, the frame includes a first fixed column and a second fixed column arranged in parallel and vertically, a first guide wire and a second guide wire are disposed on the first fixed column, and a connecting plate is fixed on the second fixed column.

[0014] Furthermore, a mounting plate is fixed to the side of the second fixed column opposite to the connecting plate, and the elastic mechanism is mounted on the mounting plate.

[0015] Furthermore, the second wire guide is a wire guide wheel, which has a groove, and the groove sidewalls are arranged at an inclination.

[0016] The beneficial effects of the wire tensioning device in this utility model are as follows: This utility model innovatively proposes a wire tensioning device, which facilitates the guidance of the wire by setting a first guide wire and a second guide wire, and a guide wire rod that can swing relative to the frame is also provided on the frame. A third guide wire is provided on the guide wire rod, so that when the guide wire rod swings relative to the frame, the third guide wire can move relative to the first and second guide wires. By setting an elastic mechanism between the guide wire rod and the frame, an elastic force is generated between the guide wire rod and the frame. When the wire passes through the first guide wire, the third guide wire, and the second guide wire in sequence, a tension force is applied to the elastic mechanism. Under the action of the tension force and the elastic mechanism, the guide wire rod maintains its tension. Maintaining balance facilitates tensioning of the wires between the first, third, and second guide wires. Simultaneously, when the tension on the wire downstream of the second guide wire increases, the guide rod overcomes the elasticity of the elastic mechanism and moves, thus overcoming the elastic force of the mechanism. The third guide wire moves towards the first and second guide wires, causing more wires to move downstream of the second guide wire, preventing wire breakage. Because the first and second guide wires are arranged vertically and horizontally, space on the horizontal plane is saved, thus solving the problem of excessive space occupation on the horizontal plane caused by the horizontally spaced guide wire structure and the tensioning part located between the two guide wire structures in existing wire tensioning devices.

[0017] To achieve the above objectives, the yarn winding machine of this utility model adopts the following technical solution: A yarn winding machine includes a rabbit wire head and a yarn tensioning device arranged between the rabbit wire head and the wire outlet. The yarn tensioning device includes a frame and a first and a second guide wire located on the frame and spaced apart vertically. A guide rod is provided on the frame and can swing relative to the frame. A third guide wire is provided on the guide rod to guide the yarn led out by the first guide wire to the second guide wire. The third guide wire is located on one side laterally of the first and second guide wires. An elastic mechanism is provided between the frame and the guide rod to apply a force to the guide rod to move the third guide wire away from the first and second guide wires so that the yarn is tensioned.

[0018] Furthermore, the guide rod includes a rod body and an extension section perpendicular to the end of the rod body, a third guide member is fixedly disposed at the end of the extension section away from the rod body, and the elastic mechanism is disposed at one end of the rod body away from the extension section.

[0019] Furthermore, the extension section and the main body of the elastic mechanism are located on the same side of the rod body.

[0020] Furthermore, the frame is provided with a limiting structure for limiting the extreme position of the guide rod during its swing stroke relative to the frame.

[0021] Furthermore, the frame includes a connecting plate, and the limiting structure includes a first limiting rod and a second limiting rod fixed to the connecting plate and extending horizontally, with the guide rod located between the first limiting rod and the second limiting rod.

[0022] Furthermore, position switches are respectively installed on the first and second limit rods for being triggered when the guide rod swings to a certain position.

[0023] Furthermore, the frame includes a first fixed column and a second fixed column arranged in parallel and vertically, a first guide wire and a second guide wire are disposed on the first fixed column, and a connecting plate is fixed on the second fixed column.

[0024] Furthermore, a mounting plate is fixed to the side of the second fixed column opposite to the connecting plate, and the elastic mechanism is mounted on the mounting plate.

[0025] Furthermore, the second wire guide is a wire guide wheel, which has a groove, and the groove sidewalls are arranged at an inclination.

[0026] The beneficial effects of this wire winding machine are as follows: This invention improves upon existing wire winding machines by incorporating a rabbit-hair head to facilitate wire guidance and a wire tensioning device to prevent wire breakage during the movement of the rabbit-hair head. The inclusion of a first and second wire guide facilitates wire guidance, and the frame is equipped with a wire guide rod that can swing relative to the frame. A third wire guide is mounted on the wire guide rod, allowing the third wire guide to move relative to the first and second wire guides when the wire guide rod swings relative to the frame. An elastic mechanism is installed between the wire guide rod and the frame, generating elastic force between them. As the wire passes sequentially through the first, third, and second wire guides, this elastic force... When tension is applied, the guide rod maintains balance under the action of tension and elastic mechanism, thus facilitating the tensioning of the wires between the first, third, and second guide wires. Simultaneously, when the tension on the wire downstream of the second guide wire increases, the guide rod will overcome the elasticity of the elastic mechanism and move, thereby overcoming the elastic force of the elastic mechanism. The third guide wire will move towards the first and second guide wires, causing more wires to move downstream of the second guide wire, preventing the wires from being torn. Since the first and second guide wires are arranged vertically and horizontally, space on the horizontal plane is saved, thus solving the problem of the horizontally spaced guide wire structure and the excessive space occupied on the horizontal plane caused by the tensioning part being located between the two guide wire structures in the existing wire tensioning device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of an embodiment of a wire winding machine in the prior art (the rabbit wire head is located in the middle of the wire spool). Figure 2 This is a schematic diagram of an embodiment of a wire winding machine in the prior art (the rabbit wire head is located at the end of the wire spool). Figure 3 This is a structural schematic diagram of an embodiment of the wire winding machine of this utility model; Figure 4 This is a perspective view of the wire tensioning device in an embodiment of the wire winding machine of this utility model; Figure 5 This is a perspective view of the wire tensioning device in an embodiment of the wire winding machine of this utility model; Figure 6 This is a cross-sectional view of the wire tensioning device in an embodiment of the wire winding machine of this utility model.

[0028] In the diagram: 11. Wire outlet; 12. Wire; 13. Rabbit wire head; 14. Wire spool; 15. Base; 21. First fixing post; 22. Second fixing post; 23. Connecting plate; 24. Mounting plate; 25. Fixing plate; 31. First limiting rod; 32. Second limiting rod; 33. First position switch; 34. Second position switch; 4. Elastic mechanism; 41. Fixed body; 42. Rotating body; 43. Rotating shaft; 44. Bearing; 45. Torsion spring; 46. Connecting body; 51. First wire guide; 52. Second wire guide; 53. Third wire guide; 6. Wire guide rod; 61. Rod body; 62. Extension section. Detailed Implementation

[0029] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0030] This invention arranges the first and second wire guides vertically at intervals to save space in the plane. By setting a wire guide rod that can swing relative to the frame, and setting an elastic mechanism between the frame and the wire guide rod, the third wire guide set on the wire guide rod can move relative to the first and second wire guides, thereby facilitating the saving of space in the plane.

[0031] An embodiment of the yarn winding machine in this utility model: like Figure 3 As shown, in this embodiment, the wire winding machine includes a base 15 and a rabbit wire head 13 that can reciprocate relative to the base 15. A wire spool mounting structure is also provided on the base 15 for mounting a wire spool 14. After being mounted on the base 15, the wire spool 14 is used to receive and wind the wire. The wire winding machine is used to wind the wire exiting the wire outlet. After being guided by the rabbit wire head 13, the wire is wound onto the wire spool 14. To avoid excessive tension on the wire during the movement of the rabbit wire head 13, especially when it reaches both ends of the wire spool 14, which could cause the wire to break, a wire tensioning device is also provided upstream of the rabbit wire head 13.

[0032] Specifically, such as Figure 3 , Figure 4 and Figure 5 As shown, the wire tensioning device includes a frame for fixing on the base 15. The frame includes a first fixing column 21 and a second fixing column 22 fixedly installed on the base 15. Both the first fixing column 21 and the second fixing column 22 extend in the vertical direction. A first wire guide 51 and a second wire guide 52 are provided on the first fixing column 21, thereby saving space on the horizontal plane and allowing more other equipment to be arranged in the factory.

[0033] A horizontally extending mounting plate 24 is provided on the second fixed column 22. The surface of the mounting plate 24 is arranged vertically. An elastic mechanism 4 is also fixedly provided on the mounting plate 24. A guide rod 6 is fixedly connected to the elastic mechanism 4. A third guide member 53 is provided on the guide rod 6.

[0034] Specifically, such as Figure 6 As shown, the elastic mechanism 4 includes a fixed body 41 and a rotating body 42. One end of the fixed body 41 is fixed to the mounting plate 24, and the rotating body 42 is sleeved on the other end of the fixed body 41 and can rotate relative to the fixed body 41. The guide rod 6 includes a rod body 61, which is fixedly connected to the rotating body 42, so that it can rotate together with the rotating body 42 relative to the fixed body 41. A rotating shaft 43 is rotatably mounted inside the fixed body 41 through a bearing 44. One end of the rotating shaft 43 passes through the fixed body 41 and is fixedly connected to the rotating body 42, and the other end passes through the fixed body 41 and the mounting plate 24. A fixing plate 25 is fixed on the mounting plate 24. The fixing plate 25 is Z-shaped. The elastic mechanism 4 also includes a connector 46 fixed on the fixing plate 25. The connector 46 includes a rotatable rotating shaft. The rotating shaft is fixedly connected to the other end of the rotating shaft 43. This does not affect the smooth rotation of the rotating shaft 43. At the same time, the rotating shaft 43 can apply a certain holding force to the rotating body 42 to ensure that the rotating body 42 rotates stably and does not detach from the fixing body 41.

[0035] In addition, the elastic mechanism 4 also includes a torsion spring 45 fitted outside the rotating shaft 43. One end of the torsion spring 45 is fixed to the fixed body 41, and the other end is fixed to the rotating shaft 43. When the rotating shaft 43 rotates, specifically when the guide rod 6 swings in the direction of the first guide member 51 and the second guide member 52, the torsion spring 45 is deformed by force, thereby applying a force to the guide rod 6 to move the third guide member 53 away from the first guide member 51 and the second guide member 52, thereby making the wire taut.

[0036] like Figures 3-5 As shown, the first guide wire member 51, the second guide wire member 52, and the third guide wire member 53 are arranged almost on the same plane to receive and guide the wire. In other embodiments, the frame can be a vertically arranged plate, perpendicular to the direction of movement of the rabbit wire head. In this case, the first guide wire member 51 and the second guide wire member 52 are fixedly mounted on the plate surface, and the guide wire rod is rotatably mounted on the plate. Alternatively, in other embodiments, the structure of the elastic mechanism can be simpler, for example, excluding the connecting body. In this case, the axial relative fixing effect of the bearing and the rotating shaft ensures that the rotating body does not detach from the fixed body, or the rotating body and the connecting body can be omitted, allowing the end of the guide wire rod to be directly fixed to the rotating shaft.

[0037] The guide rod 6 is L-shaped and includes an extension section 62 vertically connected to the end of the rod body 61. The extension section 62 is located at the end of the rod body 61 away from the elastic mechanism 4, and the third guide member 53 is disposed at the end of the extension section 62 away from the rod body 61. Specifically, the second guide member 52 is a guide block, and the first guide member 51 and the third guide member 53 are both guide wheels. The guide wheels are provided with grooves, and the groove sidewalls are arranged outwardly to guide the wire. Of course, in other embodiments, all three guide members can be set as guide blocks or all three guide members can be set as guide wheels. Alternatively, in other embodiments, the inclined groove sidewalls on the guide wheels may not be provided, and the two groove sidewalls of the grooves may be arranged parallel.

[0038] Under the action of the elastic mechanism 4, the guide rod 6 remains balanced with the tension of the wire. As the deformation of the torsion spring 45 in the elastic mechanism 4 increases, the elastic force it can provide also increases. To ensure that the elastic force is always present during the tensioning of the wire, the torsion spring 45 in the elastic mechanism 4 is in a pre-compressed state. Before the wire is wound on the third guide member 53, since there is no tension from the wire, the guide rod 6 needs to be limited to avoid excessive movement and interference with other components. Specifically, a connecting plate 23 is also provided on the second fixed post 22. The surface of the connecting plate 23 is arranged vertically and the connecting plate 23 is located above the mounting plate 24. The connecting plate 23 and the mounting plate 24 are located on opposite sides of the second fixed post 22. A first limiting rod 31 is fixedly provided at the end of the connecting plate 23 away from the second fixed post 22 to limit the guide rod 6 when the wire is not wound.

[0039] When the thread winding machine is in use, the thread first passes through the first guide 51 after exiting the thread outlet. Then, the thread winds through the third guide 53 and the second guide 52, and is guided by the rabbit wire head 13 to wind onto the spool 14. The thread is then wound up by the winding action of the spool 14. As the rabbit wire head 13 moves, when it moves from the end position to the middle position, the tension on the thread gradually decreases. Under the elastic force of the elastic mechanism 4, the guide rod 6 moves towards the first limit rod 31. When the rabbit wire head 13 moves from the middle position to the end position, the tension on the thread gradually increases. The guide rod 6 overcomes the elastic force of the elastic mechanism 4 and moves towards the second limit rod 32. Therefore, when the thread winding machine is working, the thread pulls the guide rod 6 and swings back and forth continuously.

[0040] Meanwhile, as the diameter of the wire coil on the spool 14 continues to increase, the linear velocity of the outermost layer of the coil continues to increase, and the corresponding winding speed will also continue to increase. However, the speed of the wire exiting the outlet is constant, so the angle at which the wire pulls the guide rod 6 swings will become larger and larger. In order to prevent the guide rod 6 from overtraveling and interfering with other components, a second limiting rod 32 is also fixedly installed on the connecting plate 23. The second limiting rod 32 is located between the second fixed post 22 and the first limiting rod 31, and the movement of the guide rod 6 is also limited to between the first limiting rod 31 and the second limiting rod 32.

[0041] A first position switch 33 is installed on the first limit rod 31, and a second position switch 34 is installed on the second limit rod 32. Both position switches can be limit switches. When no yarn is wound on the third guide rod 53, that is, when the yarn winding machine is not working, the guide rod 6 contacts the first position switch 33 under the action of the torsion spring 45. The first position switch 33 is triggered, which can send a signal to the controller to facilitate the control of the position of the guide rod 6. When the yarn winding machine is working, as the yarn roll gets larger, the swing angle of the guide rod 6 increases, and eventually it contacts the second position switch 34. The second position switch 34 is triggered, which can send a signal to the controller. Then the controller controls the rotation speed of the yarn drum 14 to adjust the winding speed. After the winding speed decreases, the guide rod 6 moves away from the second position switch 34 and returns to the position between the first limit rod 31 and the second limit rod 32 to continue to achieve the yarn tensioning effect until it contacts the second position switch 34 again. The adjustment mechanism is restarted, and this cycle is repeated to complete the winding of one yarn roll.

[0042] Of course, in other embodiments, the first and second position switches can also be proximity switches. Alternatively, in other embodiments, position switches may not be provided. In this case, the first and second limit rods are only used to limit the extreme positions of the guide rod and cannot provide feedback signals. Adjustment of the bobbin winding speed relies on other means, such as installing a camera on-site, or continuously reducing the bobbin winding speed according to experience and a certain pattern. Alternatively, in other embodiments, the first and second limit rods may not be provided at all. Alternatively, in other embodiments, only the first limit rod or only the second limit rod may be provided. Alternatively, in other embodiments, the limiting structure may be a first limit block and a second limit block. Alternatively, in other embodiments, the frame may be a plate, and the limit rods or limit blocks may be fixed to the plate.

[0043] An embodiment of the wire tensioning device in this utility model: The structure of the thread tensioning device in this embodiment is the same as that of the thread tensioning device in the above-described thread winding machine embodiment, and will not be repeated here.

[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A thread tensioning device, characterized by: The device includes a frame and a first and a second wire guide located on the frame and spaced apart vertically. A wire guide rod is provided on the frame and can swing relative to the frame. A third wire guide is provided on the wire guide rod to guide the wire from the first wire guide to the second wire guide. The third wire guide is located on one side of the first and second wire guides. An elastic mechanism is provided between the frame and the wire guide rod to apply a force to the wire guide rod to move the third wire guide away from the first and second wire guides so that the wire is tensioned.

2. Thread tensioning device according to claim 1, characterized in that The guide rod includes a rod body and an extension section perpendicular to the end of the rod body. A third guide member is fixedly disposed at the end of the extension section away from the rod body, and the elastic mechanism is disposed at one end of the rod body away from the extension section.

3. Thread tensioning device according to claim 2, characterized in that: The extension section and the main body of the elastic mechanism are located on the same side of the rod body.

4. Thread tensioning device according to any one of claims 1-3, characterized in that: The frame is provided with a limiting structure to limit the extreme position of the guide rod during its swing stroke relative to the frame.

5. Thread tensioning device according to claim 4, characterized in that: The frame includes a connecting plate, and the limiting structure includes a first limiting rod and a second limiting rod that are fixed to the connecting plate and extend horizontally. The guide rod is located between the first limiting rod and the second limiting rod.

6. Thread tensioning device according to claim 5, characterized in that: Position switches are respectively installed on the first and second limit rods to be triggered when the guide rod swings to a certain position.

7. Thread tensioning device according to claim 5, characterized in that: The frame includes a first fixed column and a second fixed column arranged in parallel and vertically. A first guide wire and a second guide wire are disposed on the first fixed column, and a connecting plate is fixed on the second fixed column.

8. Thread tensioning device according to claim 7, characterized in that: A mounting plate is fixed to the side of the second fixed column opposite to the connecting plate, and the elastic mechanism is mounted on the mounting plate.

9. Thread tensioning device according to any one of claims 1-3, characterized in that: The second wire guide is a wire guide wheel, which has a groove and the sidewalls of the groove are arranged at an inclination.

10. A thread winder comprising a rabbit head and a thread tensioning device for being arranged between the rabbit head and a thread outlet, characterized in that: The thread tensioning device is the same as the thread tensioning device described in any one of claims 1-9.

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