A fabric elasticizer

Abstract

The application relates to the field of textiles, in particular to a fabric elasticizing device which comprises a mounting seat, three driving shafts vertically and rotatably mounted on the mounting seat and arranged in an equilateral triangle, a false twisting unit arranged on the driving shafts and used for false twisting of the yarn, and a yarn poking unit arranged on the mounting seat; the yarn poking unit comprises a yarn poking assembly used for poking the false twisted yarn back into the false twisting unit, and an adsorption assembly arranged on the yarn poking assembly and used for adsorbing the yarn before the yarn is poked; in the application, the yarn poking unit is cooperatively designed with the adsorption assembly and the mechanical structure, and the positioning problem caused by the relaxation of the false twisted yarn is systematically solved; when false twisting occurs, the adsorption assembly forms a negative pressure area near the adsorption port, the relaxed yarn within a certain range is automatically adsorbed to the surface of the yarn poking plate to realize positioning, and then the positioned yarn can be directly poked between the friction discs, so that the precise positioning can be realized without the pre-tightening operation by artificial fingers or a yarn poking hook.

Description

Technical Field

[0001] This invention relates to the textile field, and in particular to a fabric stretching device. Background Technology

[0002] In the textile texturing machine production process, the false twister is the core component that imparts crimp to the yarn, and its operational stability directly affects the quality of the finished yarn and production efficiency. However, in actual production, the problem of false twister slippage often disrupts the normal production order.

[0003] Currently, to address the issue of untwisting in false twisters, some texturing machines incorporate a rotating frame and matching pusher plates. The rotating frame houses three to four pusher plates arranged in parallel, with the thickness of each plate less than the vertical distance between adjacent friction discs. During untwisting, the operator manually pushes the upper or lower half of the untwisted, relaxed yarn between the friction discs of the false twister. The remaining yarn outside the friction discs then adheres tightly to them due to the force, becoming taut. The operator then rotates the rotating frame, causing the pusher plates to push the remaining yarn completely between the friction discs, thus restoring the normal false twisting process. However, this method still has certain drawbacks:

[0004] 1. Due to the uncertainty of the slack state of the yarn after untwisting, and the need for precise alignment between the yarn guide plate and the yarn for effective pushing, a slack yarn cannot be guaranteed to be aligned with the pushing path of the yarn guide plate. Once the yarn and the yarn guide plate are misaligned, the operation of the rotating frame driving the yarn guide plate will become an ineffective idle operation. In order to ensure the success of the yarn guide operation, the operator needs to manually intervene first, using fingers or a yarn guide hook to feed part of the yarn between the friction discs for pre-tensioning. However, this manual adjustment process not only depends on the operator's experience and skill, but also, because the yarn is still in motion during the operation, the adjustment is more difficult, further increasing the complexity and time cost of the operation. At the same time, direct contact between fingers and the high-speed moving yarn can easily cause burns due to the high temperature generated by friction. The yarn guide hook operates in a confined equipment space, and a slight mistake can cause it to collide with the friction disc, scratching the disc surface and affecting the normal operation and service life of the false twister.

[0005] 2. The three rotating shafts of the false twister are independent at their top ends and have no mechanical connection. This makes the rotating shafts prone to shaking when rotating at high speeds or when the equipment vibrates. Due to the independent layout of the rotating shafts, it is impossible to suppress the offset through mutual support between structures. This can cause fluctuations in the gap between the friction discs during operation. During false twisting, the yarn may slip out of the gap between the friction discs due to uneven force, resulting in untwisted yarn. In addition, when the yarn tension fluctuates or the workshop environment vibrates, the independent rotating shafts are more likely to experience larger offsets, making the shape of the false twisting working area irregular and forcibly twisting the yarn. This not only causes untwisted yarn but can also lead to fuzzy yarn or yarn breakage. Summary of the Invention

[0006] In view of the problem in the above or existing technology that workers need to manually intervene first to ensure the success of the thread-pulling operation, by using their fingers or thread-pulling hooks to feed the thread part into the friction discs for pre-tensioning, the present invention is proposed.

[0007] Therefore, the object of the present invention is to provide a fabric stretching device.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a fabric stretching device, comprising,

[0009] Mounting base;

[0010] Three drive shafts are vertically rotatably mounted on the mounting base and arranged in an equilateral triangle.

[0011] A false twisting unit mounted on the drive shaft for false twisting the filament, and a filament pusher unit mounted on the mounting base;

[0012] The thread-pushing unit includes a thread-pushing assembly for re-pushing the untwisted yarn into the false twist unit. The thread-pushing assembly is provided with an adsorption assembly for adsorbing the yarn before thread-pushing. The false twist unit is provided with a triangular locking unit, which includes a locking assembly and a control assembly. The control assembly is used to control the locking assembly to lock and reinforce the false twist unit as the thread-pushing assembly moves.

[0013] As a preferred embodiment of the fabric texturing device of the present invention, the false twist unit includes three slide rails fixedly installed on the mounting base and distributed in a triangular pattern. A rotating shaft is slidably installed in the slide rails. A plurality of friction discs are fixedly sleeved on the outside of the rotating shaft. Adjacent friction discs are separated by spacers. A guide disc is fixedly installed on the outside of one of the rotating shafts.

[0014] As a preferred embodiment of the fabric texturing device of the present invention, the yarn-pulling assembly includes a fixed shaft fixedly installed on a mounting base and a rotating frame rotatably installed on the outside of the fixed shaft. A mounting frame is fixedly installed on the rotating frame, and a plurality of yarn-pulling plates are fixedly installed on the mounting frame near the friction disc. Air passages are opened in the yarn-pulling plates.

[0015] In a preferred embodiment of the fabric texturing device of the present invention, the adsorption component includes a main air pipe fixedly installed on the side of the mounting frame away from the friction disc, and the main air pipe is divided into several branch air pipes corresponding to the number of the yarn guide plates.

[0016] As a preferred embodiment of the fabric texturing device of the present invention, the air distribution pipe is connected to the air passage of the corresponding filament-pulling plate, and the filament-pulling plate has an adsorption port and a guide surface for diffusing the adsorbed airflow on the side near the friction disc.

[0017] In a preferred embodiment of the fabric stretching device of the present invention, the locking assembly includes a column fixedly installed on the mounting base, a top plate fixedly installed at the end of the column away from the mounting base, three return springs distributed in a triangular pattern fixedly installed on the side of the top plate near the rotating shaft, and a locking sleeve fixedly installed at the end of the return springs near the mounting base.

[0018] In a preferred embodiment of the fabric stretching device of the present invention, the three locking sleeves are interconnected by three connecting rods to form a triangular locking reinforcement structure, and a limiting rod that slides through the top plate is fixedly installed on the side of the locking sleeve away from the mounting base.

[0019] In a preferred embodiment of the fabric stretching device of the present invention, the control component includes a pressure block fixedly mounted on the outside of a locking sleeve near the mounting frame via a mounting plate, and an extrusion block that cooperates with the pressure block is fixedly mounted on the mounting frame.

[0020] As a preferred embodiment of the fabric stretching device of the present invention, a lower guide sleeve is installed together among the three connecting rods, an upper guide sleeve corresponding to the lower guide sleeve is fixedly inserted through the middle of the top plate, and a reinforcing sleeve is slidably installed on the outside of the column and fixedly connected to the connecting rod near the column.

[0021] The beneficial effects of the fabric stretching device of the present invention are as follows:

[0022] 1. In this application, the wire-pushing unit systematically solves the positioning problem caused by the loosening of the wire after untwisting through the coordinated design of the adsorption component and the mechanical structure. When untwisting occurs, the adsorption component forms a negative pressure zone near the adsorption port, which automatically adsorbs the loose wire within a certain range onto the surface of the wire-pushing plate to achieve positioning. Then, the positioned wire can be directly pushed into the friction discs, so that precise positioning can be achieved without the need for pre-tensioning by manual fingers or wire-pushing hooks. This makes the pushing path of the wire-pushing plate automatically aligned with the wire, greatly reducing the probability of ineffective empty runs. At the same time, the mechanical pushing process of the wire-pushing plate driven by the rotating frame does not require manual contact with the high-speed wire, eliminating the risk of burns and the hidden danger of friction disc scratches, significantly improving processing efficiency and reducing labor intensity.

[0023] 2. In this application, during false twisting, three locking sleeves form a rigid triangular frame through connecting rods, which radially constrains the three rotating shafts. The geometric stability of the triangle significantly reduces the amount of shaking of the rotating shafts. When untwisting is handled, the locking unit unlocks in conjunction with the yarn guide assembly, allowing the rotating shafts to slide adaptively within the slide rail. During reset, the three rotating shafts are synchronously locked through inclined plane compression and spring thrust, ensuring coaxiality. This allows the yarn to be subjected to uniform radial pressure in the false twisting working area, significantly improving the uniformity of twist distribution and reducing the probability of untwisting. In addition, the torsional stiffness of the triangular frame is significantly improved compared to the independent shaft structure, which can effectively suppress the rotation shaft offset caused by equipment vibration or yarn tension fluctuation. Combined with the precise positioning of the guide sleeve, the cause of untwisting caused by the shaking of the rotating shaft is eliminated from the mechanical structure level, achieving a dual improvement in false twisting accuracy and device reliability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a three-dimensional structural diagram of the wire-pulling unit of the present invention during operation.

[0026] Figure 2 For the present invention Figure 1 A magnified view of part A in the middle.

[0027] Figure 3 This is a three-dimensional structural diagram of the slide rail, rotating shaft, friction disk, and spacer of the present invention.

[0028] Figure 4 This is a three-dimensional structural diagram of the rotating frame, mounting frame, and wire-pulling plate of the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the lower guide wire sleeve and reinforcing sleeve of the limiting rod of the present invention.

[0030] Figure 6 This is a three-dimensional structural diagram of the adsorption port and the flow guiding surface of the present invention.

[0031] In the diagram: 1. Mounting base; 2. Drive shaft; 3. False twist unit; 311. Slide rail; 312. Rotating shaft; 313. Friction disc; 314. Spacer; 315. Outlet disc; 4. Triangular locking unit; 41. Locking assembly; 411. Column; 412. Top plate; 413. Return spring; 414. Locking sleeve; 415. Connecting rod; 416. Limiting rod; 417. Lower guide wire sleeve; 418. Reinforcing sleeve; 42. Control assembly; 421. Mounting plate; 422. Pressure block; 423. Extrusion block; 5. Wire-pushing unit; 51. Wire-pushing assembly; 511. Fixed shaft; 512. Rotating frame; 513. Mounting frame; 514. Wire-pushing plate; 52. Adsorption assembly; 521. Main air pipe; 522. Distribution air pipe; 523. Adsorption port; 524. Guide surface; 6. Upper guide wire sleeve. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1 This embodiment provides a fabric stretching device that can achieve precise positioning without the need for pre-tensioning by manual fingers or thread-pulling hooks, so that the pushing path of the thread-pulling plate 514 is automatically aligned with the yarn, greatly reducing the probability of ineffective empty running. It includes a mounting base 1 and three drive shafts 2 that are vertically rotatably mounted on the mounting base 1 and distributed in an equilateral triangle. The drive shafts 2 are provided with false twisting units 3 for false twisting the yarn.

[0034] Reference Figure 1 , Figure 3 and Figure 6 The false twist unit 3 includes three slide rails 311 fixedly installed on the mounting base 1 and arranged in a triangular pattern. A rotating shaft 312 is slidably installed inside the slide rail 311. Several friction discs 313 are fixedly sleeved on the outside of the rotating shaft 312. Adjacent friction discs 313 are separated by spacers 314. A guide disc 315 is fixedly installed on the outside of one of the rotating shafts 312. The guide disc 315 is located between the friction discs 313 and the slide rails 311.

[0035] It should be noted that the three drive shafts 2 are connected by belt drive. The friction disc 313 maintains a precise distance through the spacer 314 to form a false twist working area. When the rotating shaft 312 is on the side of the slide rail 311 close to the mounting base 1, the rotating shaft 312 is concentric with the drive shaft 2. At this time, the drive shaft 2 drives the rotating shaft 312 to rotate, which can perform the false twist operation.

[0036] During operation, the filament entering the false twist unit 3 is a single strand with a diameter of approximately 11-55 micrometers. After false twisting is completed, the filament is led out tangentially from the lead-out disc 315. The lead-out angle matches the twist direction of the filament, ensuring that the filament leaves the friction disc 313 area in a straight line, thus avoiding self-winding caused by deviation of the lead-out trajectory.

[0037] In practical use, when performing false twisting, the triangular locking unit 4 is in the state of locking the false twisting unit 3 (e.g., Figure 6 As shown, when the yarn enters the false twist unit 3, three rotating shafts 312 arranged in an equilateral triangle are driven by the drive shaft 2 to rotate at high speed. The yarn is vertically guided from the upper guide sleeve 6 above and then enters the gap of the friction disc 313 (false twist working area). When the yarn passes through the gap of the friction disc 313, it is subjected to the friction force of the high-speed rotating friction disc 313 and is subjected to torsional torque to generate false twist. Since the three rotating shafts 312 are arranged in an equilateral triangle, the yarn is subjected to uniform radial pressure in the space formed by the three friction discs 313, ensuring uniform twist distribution. Finally, the yarn is guided out tangentially by the guide disc 315 to ensure that the yarn smoothly transitions to the next process.

[0038] Reference Figure 1 , Figure 4 and Figure 6 The mounting base 1 is provided with a thread-pushing unit 5. The thread-pushing unit 5 includes a thread-pushing assembly 51 for pushing the untwisted thread back into the false twist unit 3. The thread-pushing assembly 51 includes a fixed shaft 511 fixedly mounted on the mounting base 1 and a rotating frame 512 rotatably mounted on the outside of the fixed shaft 511. A mounting frame 513 is fixedly mounted on the rotating frame 512. Several thread-pushing plates 514 are fixedly mounted on the side of the mounting frame 513 near the friction disc 313. Air passages are opened in the thread-pushing plates 514.

[0039] Reference Figure 1 , Figure 4 and Figure 6 The wire-pulling assembly 51 is provided with an adsorption assembly 52 for adsorbing the wire before pulling the wire. The adsorption assembly 52 includes a main air pipe 521 fixedly installed on the side of the mounting frame 513 away from the friction plate 313. The main air pipe 521 is divided into several branch air pipes 522 corresponding to the number of wire-pulling plates 514.

[0040] Reference Figure 1 , Figure 4 and Figure 6 The air distribution pipe 522 is connected to the air passage of the corresponding wire-pulling plate 514. The wire-pulling plate 514 has an adsorption port 523 and a guide surface 524 for diffusing the adsorbed airflow on the side near the friction disc 313. The false twist unit 3 is provided with a triangular locking unit 4.

[0041] It should be noted that the air inlet of the main air pipe 521 is connected to an external air pump.

[0042] In practical use, when the false twister experiences slippage, the operator applies force to rotate the rotating frame 512, causing it to rotate around the fixed axis 511 in a circular motion. This drives the mounting frame 513 to rotate synchronously, aligning the wire-pulling plate 514 with the gap of the friction disc 313 and causing it to rotate closer. During this process, the adsorption assembly 52 is connected to an external air pump through the main air pipe 521. When the air pump starts, it generates negative pressure, causing outside air to be drawn into the air passage from the adsorption port 523. At this time, because the guide surface 524 at the adsorption port 523 is diffused... When air is drawn in through the adsorption port 523, the guide surface 524 guides the airflow to accelerate through. According to the principle of fluid mechanics, the air pressure decreases where the flow rate increases, thus forming a negative pressure area near the adsorption port 523. This negative pressure area automatically adsorbs the loosened filament after untwisting onto the surface of the filament pusher plate 514, achieving precise positioning. Subsequently, the rotating frame 512 rotates, driving the filament pusher plate 514 to push the filament into the gap of the friction disc 313, completing the untwisting process. The entire process does not require manual contact with the filament or pre-tensioning operation.

[0043] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 The triangular locking unit 4 includes a locking component 41 and a control component 42. The control component 42 is used to control the locking component 41 to lock and strengthen the false twist unit 3 as the thread-pulling component 51 moves.

[0044] Reference Figure 2 , Figure 5 and Figure 6 The locking assembly 41 includes a column 411 fixedly installed on the mounting base 1. A top plate 412 is fixedly installed on the end of the column 411 away from the mounting base 1. Three return springs 413 distributed in a triangular pattern are fixedly installed on the side of the top plate 412 near the rotating shaft 312. A locking sleeve 414 is fixedly installed on the end of the return springs 413 near the mounting base 1.

[0045] Reference Figure 2 , Figure 5 and Figure 6 The three locking sleeves 414 are interconnected by three connecting rods 415 to form a triangular locking reinforcement structure. A limiting rod 416 that slides through the top plate 412 is fixedly installed on the side of the locking sleeve 414 away from the mounting base 1.

[0046] It should be noted that the inner wall of the locking sleeve 414 is provided with balls (not shown in the figure) and contacts the rotating shaft 312 through the balls, thereby converting the surface contact friction into point contact rolling friction. When the locking sleeve 414 forms a radial constraint on the rotating shaft 312, the balls can roll with the high-speed rotation of the rotating shaft 312, avoiding the heat accumulation and wear caused by direct friction between the metal surfaces. The design of the balls is common knowledge to those skilled in the art, therefore, it will not be described in detail in this application.

[0047] Reference Figure 2 , Figure 5 and Figure 6 The control component 42 includes a pressure block 422 fixedly mounted on the outside of a locking sleeve 414 near the mounting bracket 513 via a mounting plate 421, and a pressing block 423 that cooperates with the pressure block 422 is fixedly mounted on the mounting bracket 513.

[0048] It should be noted that the mating surface between the extrusion block 423 and the pressure block 422 is an inclined surface.

[0049] Reference Figure 2 , Figure 5 and Figure 6 A lower guide wire sleeve 417 is installed between the three connecting rods 415. An upper guide wire sleeve 6 corresponding to the lower guide wire sleeve 417 is fixedly inserted through the middle of the top plate 412. A reinforcing sleeve 418 is slidably installed on the outside of the column 411 and is fixedly connected to the connecting rod 415 on the side near the column 411.

[0050] It should be noted that when the yarn enters the false twist unit 3, the yarn is vertically guided from the upper guide sleeve 6 above, and then enters the gap of the friction disc 313 (false twist working area) after passing through the lower guide sleeve 417.

[0051] In practical use, when slippage occurs, the operator applies force to rotate the rotating frame 512, causing it to move in an arc around the fixed axis 511, which drives the mounting frame 513 to rotate synchronously. This causes the thread-pushing plate 514 to align with the gap of the friction disc 313 and rotate closer. During this process, the pressing block 423 gradually disengages from the pressure block 422. Afterward, the pressure block 422 is no longer constrained in the vertical direction. Under the elastic force of the return spring 413, the pressure block 422 begins to move away from the friction disc 313 and reset, thereby releasing the integrated triangular lock on the rotating shaft 312. At this time, the rotating shaft 312 can slide within the slide rail 311. When the thread-pushing plate 514 adsorbs the thread through the adsorption component 52 and pushes the thread to press against the friction disc 313, the rotating shaft 312 can slide adaptively within the slide rail 311. This reduces the thread-pushing resistance and avoids sudden tension changes in the thread caused by forced pushing, ensuring that the slippage thread can be smoothly introduced into the gap of the friction disc 313, significantly improving the success rate of the thread-pushing operation and the integrity of the thread.

[0052] After the thread-pulling assembly 51 completes its thread-pulling operation, the mounting bracket 513 rotates away from the friction disc 313, thereby causing the inclined surface of the pressing block 423 to press against the inclined surface of the pressure block 422. This causes the pressure block 422 to move closer to the friction disc 313, which in turn causes the corresponding locking sleeve 414 to move synchronously. At the same time, this locking sleeve 414 (the locking sleeve 414 connected to the pressure block 422) drives two other locking sleeves 414 to move synchronously closer to the rotating shaft 312 via the connecting rod 415. As the mounting bracket 513 continues to rotate, when the inclined surface of the pressing block 423 separates from that of the pressure block 422, the planes on their closest sides abut against each other, forming a vertical locking and fixing of the pressure block 422. Meanwhile, the three locking sleeves 414 are respectively fitted onto the top of the corresponding rotating shaft 312. At this time, the three locking sleeves 414 and the three connecting rods 415 form an integrated triangular locking and reinforcing structure for the three rotating shafts 312.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A fabric stretching device, characterized in that: include, Mounting base (1); Three drive shafts (2) are vertically rotatably mounted on the mounting base (1) and arranged in an equilateral triangle; The false twist unit (3) is mounted on the drive shaft (2) and the wire-pulling unit (5) is mounted on the mounting base (1); The wire-pulling unit (5) includes a wire-pulling assembly (51), on which an adsorption assembly (52) is provided. The false twist unit (3) is provided with a triangular locking unit (4), which includes a locking assembly (41) and a control assembly (42). The control assembly (42) is used to control the locking assembly (41) to lock and strengthen the false twist unit (3) as the wire-pulling assembly (51) moves. The false twist unit (3) includes three slide rails (311) fixedly installed on the mounting base (1) and arranged in a triangular pattern. A rotating shaft (312) is slidably installed in the slide rails (311). The locking assembly (41) includes a column (411) fixedly installed on the mounting base (1). A top plate (412) is fixedly installed on the end of the column (411) away from the mounting base (1). Three return springs (413) arranged in a triangular pattern are fixedly installed on the side of the top plate (412) near the rotating shaft (312). A locking sleeve (414) is fixedly installed on the end of the return spring (413) near the mounting base (1). The three locking sleeves (414) are connected to each other by three connecting rods (415) to form a triangular locking reinforcement structure. A plurality of friction discs (313) are fixedly sleeved on the outside of the rotating shaft (312). The wire-poke assembly (51) includes a fixed shaft (511) fixedly installed on the mounting base (1) and a rotating frame (512) rotatably installed on the outside of the fixed shaft (511). A mounting frame (513) is fixedly installed on the rotating frame (512). A plurality of wire-poke plates (514) are fixedly installed on the side of the mounting frame (513) near the friction discs (313). An air passage is opened in the wire-poke plate (514).

2. The fabric texturing device as described in claim 1, characterized in that: Adjacent friction discs (313) are separated by spacers (314), and an output disc (315) is fixedly installed on the outside of one of the rotating shafts (312).

3. The fabric texturing device as described in claim 1, characterized in that: The adsorption assembly (52) includes a main air pipe (521) fixedly installed on the side of the mounting frame (513) away from the friction disc (313), and the main air pipe (521) is divided into a number of branch air pipes (522) corresponding to the number of the wire-poke plates (514).

4. The fabric stretching device as described in claim 3, characterized in that: The air distribution pipe (522) is connected to the air passage of the corresponding wire-poke plate (514). The wire-poke plate (514) has an adsorption port (523) and a guide surface (524) for diffusing the adsorbed airflow on the side near the friction disc (313).

5. The fabric stretching device as described in claim 1, characterized in that: The locking sleeve (414) is fixedly installed with a limiting rod (416) that slides through the top plate (412) on the side away from the mounting base (1).

6. The fabric texturing device as described in claim 1, characterized in that: The control component (42) includes a pressure block (422) fixedly mounted on the outside of a locking sleeve (414) near the mounting bracket (513) via a mounting plate (421), and a pressing block (423) that cooperates with the pressure block (422) is fixedly mounted on the mounting bracket (513).

7. The fabric stretching device as described in claim 6, characterized in that: A lower guide sleeve (417) is installed between the three connecting rods (415). An upper guide sleeve (6) corresponding to the lower guide sleeve (417) is fixedly inserted through the middle of the top plate (412). A reinforcing sleeve (418) is slidably installed on the outside of the column (411) and fixedly connected to the connecting rod (415) on the side close to the column (411).

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