Yarn-breaking-preventing knitted gray fabric weft knitting machine based on tension adjustment

Abstract

The utility model discloses an anti-thread-breaking knitted gray fabric weft knitting machine based on tension adjustment, and relates to the technical field of weft knitting machines, the anti-thread-breaking knitted gray fabric weft knitting machine comprises a weft knitting machine body, and a placing support is arranged in the weft knitting machine body. According to the yarn-breaking-preventing knitted gray fabric weft knitting machine based on tension adjustment, water is conveyed or drained into the water tank through the water inlet or the water outlet in the tension adjusting assembly so that the overall gravity of the water tank, the sliding plate, the connecting support and the adjusting wheel can be adjusted; meanwhile, under the action of the water tank, the gravity can be increased or reduced in a water supplementing or draining mode, so that proper adjusting force can be rapidly switched according to selected spinning thread materials, the disassembly and assembly process is not needed, and the working efficiency is improved; meanwhile, two broken thread ends can be quickly captured and clamped at the moment when the doubling thread is broken through the thread breaking protection assembly, the situation that the device is stuck and damaged due to springback generated when the doubling thread is broken is prevented, and meanwhile later maintenance of workers is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of weft knitting machine technology, and in particular to a weft knitting machine for anti-broken yarn knitted fabric based on tension adjustment. Background Technology

[0002] A weft knitting machine is a machine that uses yarn to continuously form loops along the transverse direction of the fabric and interlock them to knit greige fabric. Its working principle is that the yarn is supplied by a yarn bobbin and fed into the knitting needles on a high-speed rotating circular or flat metal needle bed through a yarn guide and tension device. Under the push of the cam, the knitting needles move along a specific trajectory and complete actions such as loop removal, yarn padding, loop closing, loop joining, yarn bending, loop release, loop formation, and tensioning in sequence, bending the yarn into new loops and passing them through the previous loops. This cycle is repeated to form a continuous weft-knitted fabric greige.

[0003] Before knitting fabric weft knitting machines can feed yarn into flat knitting machines for knitting, tension adjustment is required. However, existing knitting fabric weft knitting machines only use telescopic springs to adjust the tension of the yarn. Due to the fixed elastic limit of the telescopic springs, different telescopic springs need to be replaced when adjusting the tension of different yarns. Moreover, after long-term operation, the telescopic springs may lose their elasticity, resulting in excessive or insufficient tension of the yarn, causing damage, reducing work efficiency and failing to guarantee product quality. Utility Model Content

[0004] This utility model discloses a tension-adjustable anti-broken yarn knitting fabric weft knitting machine, which aims to solve the technical problem that existing knitting fabric weft knitting machines rely solely on telescopic springs to adjust the yarn tension. Because the elastic limit is fixed, the springs need to be replaced when the yarn is changed, and the springs are prone to elastic fatigue after long-term use, resulting in unstable tension and damage to the yarn.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tension-adjustable anti-broken yarn knitting fabric weft knitting machine, comprising: a weft knitting machine body, wherein a placement bracket is provided inside the weft knitting machine body, and a fixing plate is fixedly connected to the upper side of the placement bracket; a U-shaped fixing plate, wherein two U-shaped fixing plates are respectively fixedly connected to the upper sides of both ends of the fixing plate; a tension adjustment component, which is disposed on the upper side of the fixing plate, and is used to adaptively adjust the surface tension of the yarn during the conveying process; and a yarn breakage protection component, wherein two yarn breakage protection components are respectively disposed inside the two U-shaped fixing plates, and are used to quickly capture the two ends of the yarn after it breaks.

[0006] In a preferred embodiment, the tension adjustment assembly includes: a U-shaped fixing frame, fixedly connected to the upper side of a fixing plate, with two guide rails equally spaced inside both ends of the U-shaped fixing plate, and the outer walls of the multiple guide rails slidably connected to the same sliding plate; an adjusting threaded rod, slidably connected to a through hole on the upper side of the U-shaped fixing frame, with one end of the adjusting threaded rod on the lower side of the U-shaped fixing frame screwed into a threaded hole on the upper side of the sliding plate; two pressure sensors, each located on the upper side of the U-shaped fixing frame, with the upper sides of the two pressure sensors abutting against the lower side of the other end of the adjusting threaded rod; and two sliding wedges, each fixedly connected to both ends of the sliding plate, and sliding within sliding grooves on both sides of the U-shaped fixing frame.

[0007] In a preferred embodiment, the tension adjustment assembly further includes: a water tank disposed on the lower side of the sliding plate, with an inlet on one side and an outlet on the lower side; a connecting bracket fixedly connected to the lower side of the sliding plate, the water tank being located between the connecting bracket and the sliding plate, and an adjusting wheel being connected to the lower end of the connecting bracket via a bearing.

[0008] In a preferred embodiment, the wire breakage protection component includes: guide rail plates, two guide rail plates are respectively fixedly connected to the upper inner wall and the lower inner wall of the U-shaped fixed plate, and the two guide rail plates are respectively provided with the same groove plate and protrusion plate inside, the groove plate is fixedly connected to the two guide rail plates by bolts, and the protrusion plate is slidably connected to the two guide rail plates.

[0009] In a preferred embodiment, the wire breakage protection assembly further includes: a fixed pressure plate, disposed on the side of the protrusion plate away from the groove plate, the fixed pressure plate being fixedly connected to two guide rail plates by bolts, and compression springs being fixedly connected at equal intervals on the side of the fixed pressure plate near the protrusion plate, the other ends of the multiple compression springs being fixedly connected to the protrusion plate; and a limiting fixing rod, slidably connected inside a sliding hole opened on one side of the fixed pressure plate, one end of the limiting fixing rod being fixedly connected to the protrusion plate.

[0010] In a preferred embodiment, the wire breakage protection assembly further includes: a locking frame, fixedly connected to the inner wall of the U-shaped fixing plate, with limit grooves equally spaced on both sides of the locking frame, and the same locking plate slidably connected inside the multiple limit grooves. One end of the locking plate located outside the locking frame is in contact with and locked to the other end of the limit fixing rod. One end of a telescopic spring is fixedly connected to one side of the locking plate at equal intervals, and the other ends of the multiple telescopic springs are fixedly connected to the inner wall of the locking frame; a sliding trigger rod, one end of which is fixedly connected to the side of the locking plate away from the telescopic spring, and the other end of which passes through a trigger hole opened on one side of the U-shaped fixing frame and is located inside the sliding groove. The sliding trigger rod slides inside the trigger hole, and can push the locking plate under the pressure of the falling sliding wedge, thereby releasing the locking rod.

[0011] In a preferred embodiment, a guide frame is fixedly connected to the upper side of each of the two U-shaped fixing plates. One end of each guide frame is connected to a guide wheel via a bearing. A moving groove is opened on the opposite side of each of the two U-shaped fixing plates. An adaptive guide block is slidably connected inside each of the two moving grooves. A roller is provided inside the adaptive guide block so that it can quickly and adaptively adjust according to the tension change of the spinning thread.

[0012] As can be seen from the above, the tension-adjustable anti-broken yarn knitting fabric weft knitting machine provided by this utility model has the following advantages: it utilizes the tension adjustment component to supply or drain water into the water tank through the inlet or outlet, thereby adjusting the overall gravity of the water tank, sliding plate, connecting bracket and adjusting wheel. At the same time, the water tank can increase or decrease the gravity by replenishing or draining water, so that the appropriate adjustment force can be quickly switched according to the selected yarn material without disassembly or assembly, thus improving work efficiency. In addition, the broken yarn protection component can quickly capture and clamp the two broken yarn ends at the moment of yarn breakage, preventing the rebound caused by the broken yarn from jamming and damaging the device, and also facilitating the later maintenance of the staff. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a tension-adjustable anti-breakage knitting fabric weft knitting machine proposed in this utility model.

[0014] Figure 2 This is a schematic diagram of the structure above the fixing plate of a tension-adjustable anti-broken yarn knitting fabric weft knitting machine proposed in this utility model.

[0015] Figure 3 This is a schematic diagram of the overall structure of a tension adjustment component for a weft knitting machine for preventing yarn breakage based on tension adjustment, as proposed in this utility model.

[0016] Figure 4This is an exploded structural diagram of a tension adjustment component for a tension-adjustable anti-breakage knitting fabric weft knitting machine based on tension adjustment, as proposed in this utility model.

[0017] Figure 5 This is a schematic diagram of the overall structure of a thread breakage protection component for a weft knitting machine for anti-broken yarn fabric based on tension adjustment, as proposed in this utility model.

[0018] Figure 6 This is a schematic diagram of the internal structure of a thread breakage protection component for a weft knitting machine based on tension adjustment for preventing thread breakage.

[0019] In the attached diagram: 1. Weft knitting machine body; 2. Placement bracket; 3. Fixing plate; 4. Tension adjustment assembly; 401. Water tank; 402. Guide rail rod; 403. Sliding plate; 404. Adjusting threaded rod; 405. Pressure sensor; 406. Sliding wedge; 407. U-shaped fixing frame; 408. Adjusting wheel; 409. Connecting bracket; 410. Water outlet; 411. Water inlet; 5. Thread breakage protection assembly; 501. Guide rail plate; 502. Groove plate; 503. Protrusion plate; 504. Compression spring; 505. Fixed pressure plate; 506. Sliding trigger rod; 507. Locking plate; 508. Locking frame; 509. Telescopic spring; 510. Limiting fixing rod; 6. U-shaped fixing plate; 7. Wire guide wheel; 8. Wire guide frame; 9. Adaptive wire guide block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] The present invention discloses a tension-adjustable anti-broken yarn knitting fabric weft knitting machine, which is mainly used in existing knitting fabric weft knitting machines that rely solely on telescopic springs to adjust the yarn tension. Because the elastic limit is fixed, the spring needs to be replaced when the yarn is changed, and the spring is prone to elastic fatigue after long-term use, resulting in unstable tension and damage to the yarn.

[0022] Reference Figure 1 and Figure 2A tension-adjustable anti-broken yarn knitting fabric weft knitting machine includes: a weft knitting machine body 1, with a placement bracket 2 inside the weft knitting machine body 1, and a fixing plate 3 fixedly connected to the upper side of the placement bracket 2; two U-shaped fixing plates 6, which are respectively fixedly connected to the upper sides of the two ends of the fixing plate 3; a tension adjustment component 4, which is disposed on the upper side of the fixing plate 3, and is used to adaptively adjust the surface tension of the yarn during the conveying process; and a yarn breakage protection component 5, which is disposed inside the two U-shaped fixing plates 6, and is used to quickly capture the two ends of the yarn after it breaks.

[0023] Reference Figures 1-4 In a preferred embodiment, the tension adjustment assembly 4 includes: a U-shaped fixing frame 407, fixedly connected to the upper side of the fixing plate 3, with two guide rails 402 equally spaced inside both ends of the U-shaped fixing frame 407, and the outer walls of the multiple guide rails 402 slidably connected to the same sliding plate 403; an adjusting threaded rod 404, slidably connected to the through hole opened on the upper side of the U-shaped fixing frame 407, with one end of the adjusting threaded rod 404 located on the lower side of the U-shaped fixing frame 407 screwed into the threaded hole opened on the upper side of the sliding plate 403; two pressure sensors 405, with two pressure sensors 405 located on the upper side of the U-shaped fixing frame 407, with the two pressure sensors 405 located on both sides of the adjusting threaded rod 404, and the upper sides of the two pressure sensors 405 abutting against the lower side of the other end of the adjusting threaded rod 404; and two sliding wedges 406, with two sliding wedges 406 fixedly connected to both ends of the sliding plate 403, and the two sliding wedges 406 sliding in the sliding grooves opened on both sides of the U-shaped fixing frame 407.

[0024] In this scheme, the tension adjustment component 4 further includes: a water tank 401, which is located on the lower side of the sliding plate 403, with an inlet 411 on one side of the water tank 401 and an outlet 410 on the lower side of the water tank 401; a connecting bracket 409, which is fixedly connected to the lower side of the sliding plate 403, with the water tank 401 located between the connecting bracket 409 and the sliding plate 403, and an adjusting wheel 408 connected to the lower end of the connecting bracket 409 via a bearing.

[0025] Before the knitting process, water is supplied or drained from the water tank 401 through the inlet 411 or outlet 410 to adjust the overall gravity of the water tank 401, sliding plate 403, connecting bracket 409, and adjusting wheel 408. Since the surface tension of the yarn is adaptively adjusted by the overall gravity, and the gravity can be increased or decreased by replenishing or draining water through the water tank 401, the appropriate adjustment intensity can be quickly switched according to the selected yarn material. There is no need for disassembly or assembly, which improves work efficiency. Moreover, the tension adjustment by gravity is not affected by the service life of the equipment.

[0026] Reference Figures 1-6 In a preferred embodiment, the wire breakage protection component 5 includes: guide rail plates 501, two guide rail plates 501 are respectively fixedly connected to the upper inner wall and the lower inner wall of the U-shaped fixing plate 6, and the two guide rail plates 501 are respectively provided with the same groove plate 502 and protrusion plate 503. The groove plate 502 is fixedly connected to the two guide rail plates 501 by bolts, and the protrusion plate 503 is slidably connected to the two guide rail plates 501.

[0027] In this solution, the wire breakage protection component 5 further includes: a fixed pressure plate 505, which is disposed on the side of the protrusion plate 503 away from the groove plate 502. The fixed pressure plate 505 is fixedly connected to two guide rail plates 501 by bolts. Compression springs 504 are fixedly connected at equal intervals on the side of the fixed pressure plate 505 near the protrusion plate 503. The other end of the multiple compression springs 504 is fixedly connected to the protrusion plate 503. A limiting fixing rod 510 is slidably connected inside the sliding hole opened on one side of the fixed pressure plate 505. One end of the limiting fixing rod 510 is fixedly connected to the protrusion plate 503.

[0028] In this solution, the wire breakage protection component 5 further includes: a locking frame 508, fixedly connected to the inner wall of the U-shaped fixing plate 6, with limit grooves equally spaced on both sides of the locking frame 508, and the same locking plate 507 slidably connected inside the multiple limit grooves, with one end of the locking plate 507 located outside the locking frame 508 contacting and locking with the other end of the limit fixing rod 510, and one end of a telescopic spring 509 fixedly connected at equal intervals on one side of the locking plate 507, with the other ends of the multiple telescopic springs 509 fixedly connected to the inner wall of the locking frame 508; and a sliding trigger rod 506, with one end fixedly connected to the side of the locking plate 507 away from the telescopic spring 509, and the other end of the sliding trigger rod 506 passing through a trigger hole opened on one side of the U-shaped fixing frame 407 and located inside the sliding groove, the sliding trigger rod 506 sliding inside the trigger hole, and the sliding trigger rod 506 can push the locking plate 507 under the downward pressure of the sliding wedge block 406, thereby releasing the lock on the limit fixing rod 510.

[0029] During the continuous feeding of the spinning thread, the sliding trigger rod 506, under the pressure of the sliding wedge block 406, causes the locking plate 507 connected to its other end to overcome the elasticity of the telescopic spring 509, causing one end of the locking plate 507 to separate and release the lock on the limiting fixing rod 510. The unlocked limiting fixing rod 510 and the protrusion plate 503 fixedly connected to it quickly contact and engage with the groove plate 502 under the action of the compression spring 504. During the engagement process, the broken spinning thread head is captured and clamped to prevent the rebound caused by the broken spinning thread from causing jamming damage to the device, and at the same time facilitates the staff to carry out maintenance later.

[0030] Reference Figure 2 , Figure 5 and Figure 6 In a preferred embodiment, a guide frame 8 is fixedly connected to the upper side of the two U-shaped fixing plates 6 respectively. One end of the two guide frames 8 is connected to a guide wheel 7 via a bearing. A moving groove is opened on the opposite side of the two U-shaped fixing plates 6 respectively. An adaptive guide block 9 is slidably connected inside the two moving grooves. The adaptive guide block 9 is equipped with a roller so that it can quickly adapt to the tension change of the spinning thread.

[0031] During the continuous feeding of the spinning thread, the rollers inside the adaptive guide block 9 can quickly and adaptively adjust to the changes in the tension of the spinning thread, thus avoiding damage caused by hard friction between the spinning thread and the device.

[0032] Working principle: Before the knitting process, the operator supplies or drains water into the water tank 401 through the inlet 411 or outlet 410 to adjust the overall gravity of the water tank 401, sliding plate 403, connecting bracket 409, and adjusting wheel 408. Because the surface tension of the yarn is adaptively adjusted by gravity, and the water tank 401 can increase or decrease the gravity by adding or draining water, the appropriate adjustment level can be quickly switched according to the selected yarn material. No disassembly is required, improving work efficiency. Furthermore, tension adjustment by gravity is not affected by the equipment's lifespan. During this process, the threaded rod can be adjusted... Under the action of pressure sensor 404 and pressure sensor 405, the final weight of water tank 401 can be precisely adjusted during the process of increasing weight by water supply or decreasing weight by water discharge. After the tension adjustment component 4 is adjusted, the operator first passes the yarn through the top of the first guide wheel 7, the first adaptive guide block 9, the bottom of the adjusting wheel 408, the second adaptive guide block 9, and the top of the second guide wheel 7 in sequence. Finally, the yarn is fed into the yarn feeder and sent into the flat knitting machine for weaving. Then, by rotating the adjusting threaded rod 404, it is moved away from the sliding plate 403. Under the action of gravity, the sliding plate 403 causes the adjusting wheel 408 to fall and squeeze the surface of the yarn. As the yarn is continuously fed... During the feeding process, if the yarn tension is too high, the adjusting wheel 408 moves upward along the guide rail 402 against the overall gravity, thus buffering the yarn tension. If the yarn tension is too low, the adjusting wheel 408 moves downward along the guide rail 402 under the overall gravity and squeezes the yarn surface to tighten it. In this process, the tension of the yarn surface is adaptively adjusted to prevent the yarn from breaking due to excessive tension or becoming stuck due to insufficient tension during transport. If the yarn breaks at the adjusting wheel 408 during continuous feeding, the adjusting wheel 408, lacking the support of the yarn, will fall rapidly under the overall gravity. As the two sliding wedges 406 descend, they pass the corresponding sliding trigger rods 506. Under the pressure of the sliding wedges 406, the locking plate 507 connected to the other end of the sliding trigger rod 506 overcomes the elastic force of the telescopic spring 509, causing one end of the locking plate 507 to leave and release the lock on the limiting fixing rod 510. The unlocked limiting fixing rod 510 and the protrusion plate 503 fixedly connected to it quickly contact and engage with the groove plate 502 under the action of the compression spring 504. During the engagement process, the broken yarn end is captured and clamped to prevent the rebound caused by the broken yarn from causing jamming damage to the device, and at the same time, it facilitates the staff to carry out maintenance later.

[0033] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A tension-adjustable anti-breakage knitting machine for grey fabric, characterized in that, include: The weft knitting machine body (1) has a placement bracket (2) inside, and a fixing plate (3) is fixedly connected to the upper side of the placement bracket (2); a U-shaped fixing plate (6) is fixedly connected to the upper sides of the two ends of the fixing plate (3); a tension adjustment component (4) is set on the upper side of the fixing plate (3), and the tension adjustment component (4) is used to adaptively adjust the surface tension of the yarn during the conveying process; a yarn breakage protection component (5) is set inside the two U-shaped fixing plates (6), and the yarn breakage protection component (5) is used to quickly capture the two ends of the yarn after the yarn breaks.

2. The anti-breakage knitting fabric weft knitting machine based on tension adjustment according to claim 1, characterized in that, The tension adjustment assembly (4) includes: a U-shaped fixing frame (407), which is fixedly connected to the upper side of the fixing plate (3). Two guide rails (402) are equally spaced inside both ends of the U-shaped fixing frame (407), and the outer walls of the multiple guide rails (402) are slidably connected to the same sliding plate (403); and an adjusting threaded rod (404), which is slidably connected to the through hole opened on the upper side of the U-shaped fixing frame (407). One end of the adjusting threaded rod (404) located on the lower side of the U-shaped fixing frame (407) is screwed into the threaded hole provided on the upper side of the sliding plate (403). Inside; pressure sensors (405), two pressure sensors (405) are set on the upper side of the U-shaped fixed frame (407), the two pressure sensors (405) are respectively located on both sides of the adjusting threaded rod (404), and the upper side of the two pressure sensors (405) abuts against the lower side of the other end of the adjusting threaded rod (404); sliding wedges (406), two sliding wedges (406) are respectively fixedly connected to both ends of the sliding plate (403), and the two sliding wedges (406) slide in the sliding grooves opened on both sides of the U-shaped fixed frame (407).

3. A tension-adjustable anti-breakage knitting fabric weft knitting machine according to claim 2, characterized in that, The tension adjustment assembly (4) further includes: a water tank (401) disposed on the lower side of the sliding plate (403), with an inlet (411) on one side of the water tank (401) and an outlet (410) on the lower side of the water tank (401); a connecting bracket (409) fixedly connected to the lower side of the sliding plate (403), with the water tank (401) located between the connecting bracket (409) and the sliding plate (403), and an adjusting wheel (408) connected to the lower end of the connecting bracket (409) via a bearing.

4. A tension-adjustable anti-breakage knitting fabric weft knitting machine according to claim 2, characterized in that, The broken wire protection component (5) includes: a guide rail plate (501), two guide rail plates (501) are respectively fixedly connected to the upper inner wall and the lower inner wall of the U-shaped fixed plate (6), and the two guide rail plates (501) are respectively provided with the same groove plate (502) and protrusion plate (503) inside, the groove plate (502) is fixedly connected to the two guide rail plates (501) by bolts, and the protrusion plate (503) is slidably connected to the two guide rail plates (501).

5. A tension-adjustable anti-breakage knitting fabric weft knitting machine according to claim 4, characterized in that, The broken wire protection component (5) further includes: a fixed pressure plate (505), which is located on the side of the protrusion plate (503) away from the groove plate (502). The fixed pressure plate (505) is fixedly connected to two guide rail plates (501) by bolts. A compression spring (504) is fixedly connected at equal intervals on the side of the fixed pressure plate (505) close to the protrusion plate (503). The other end of the multiple compression springs (504) is fixedly connected to the protrusion plate (503); a limiting fixing rod (510), which is slidably connected to the sliding hole opened on one side of the fixed pressure plate (505). One end of the limiting fixing rod (510) is fixedly connected to the protrusion plate (503).

6. A tension-adjustable anti-breakage knitting machine for grey fabric as described in claim 5, characterized in that, The broken wire protection component (5) further includes: a locking frame (508), fixedly connected to the inner wall of the U-shaped fixing plate (6), with limit grooves equally spaced on both sides of the locking frame (508), and the same locking plate (507) slidably connected inside the multiple limit grooves. One end of the locking plate (507) located outside the locking frame (508) is in contact with and locked to the other end of the limit fixing rod (510). One end of the telescopic spring (509) is fixedly connected at equal intervals on one side of the locking plate (507), and the other end of the multiple telescopic springs (509) is connected to the locking frame (508). The inner wall of 508 is fixedly connected; a sliding trigger rod (506) is fixedly connected at one end to the side of the locking plate (507) away from the telescopic spring (509), and the other end of the sliding trigger rod (506) passes through the trigger hole opened on one side of the U-shaped fixing frame (407) and is located inside the sliding groove. The sliding trigger rod (506) slides inside the trigger hole. The sliding trigger rod (506) can push the locking plate (507) under the downward extrusion of the sliding wedge (406) to release the lock on the limiting fixing rod (510).

7. A tension-adjustable anti-breakage knitting machine for grey fabric as described in claim 1, characterized in that, The upper sides of the two U-shaped fixing plates (6) are respectively fixedly connected to the wire frame (8). One end of the two wire frames (8) is connected to the wire wheel (7) through the bearing. The opposite sides of the two U-shaped fixing plates (6) are respectively provided with moving grooves. The two moving grooves are respectively slidably connected to the adaptive wire block (9). The adaptive wire block (9) is provided with rollers so that it can quickly adapt to the tension change of the spinning thread.

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