Automatic yarn clamping device for computerized flat knitting machine

Abstract

The present application relates to computerized flat knitting machine yarn processing technical field, disclose a kind of computerized flat knitting machine automatic yarn clamping device, comprising: rack, alarm unit, clamping unit and yarn conveying unit;The yarn conveying unit is arranged on rack, for transmission yarn on rack;The alarm unit is arranged in rack, when yarn slack or break, the alarm unit responds and controls the action of clamping unit;The clamping unit is arranged on rack, for yarn slack response, clamping unit makes action instruction to yarn, realizes single control or double control or multi-control to different passage passing yarn, the present application structure is reasonable, and the yarn transmission appears break or slackening situation by alarm unit first time signal feedback is made, while clamping unit is automatically clamped to broken yarn, save the time of maintenance and overhaul of staff, for the transmission yarn of different station automatic accurate positioning clamping, realize the independent, bilateral and synchronous control of yarn on different station, satisfy different scene demand.

Description

TECHNICAL FIELD

[0001] The present application relates to a computerized flat knitting machine, in particular to an automatic yarn clamping device of a computerized flat knitting machine. BACKGROUND

[0002] A computerized flat knitting machine is a double needle bed latch needle weft knitting machine. Its cam device is like a group of plane cams, and the needle stitches of the needles can enter the grooves of the cams, move the cams, and force the needles to make regular lifting movements in the needle grooves of the needle plate. Through the actions of the needle hooks and the needle latches, the yarns can be knitted into a knitted fabric. During the lifting process of the needles, the loops gradually exit the needle hooks, open the needle latches, and hang on the needle bars.

[0003] In the existing automatic yarn clamping device, the broken yarns during the yarn transmission process usually cannot accurately remind the workers in the first time, thereby affecting the product quality of the processing; secondly, one end of the broken yarns falls into the equipment, and the workers need to disassemble and connect the equipment again, thereby increasing the maintenance time; a plurality of groups of transmitted yarns cannot be independently controlled and clamped, and the above problems are solved by the following solution. SUMMARY

[0004] The purpose of the present application is to provide an automatic yarn clamping device of a computerized flat knitting machine, which relies on an alarm unit to make a warning for the transmitted broken or relaxed yarns, and a yarn clamping unit to effectively solve the problems of the inability of a plurality of groups of yarns to be independently controlled and clamped and the falling of the yarns into the equipment.

[0005] The above technical purpose of the present application is achieved by the following technical scheme:

[0006] An automatic yarn clamping device of a computerized flat knitting machine comprises a rack, an alarm unit, a yarn clamping unit, and a yarn conveying unit. The yarn conveying unit is arranged on the rack and is used for conveying the yarns on the rack. The alarm unit is arranged in the rack, and when the yarns are relaxed or broken, the alarm unit responds to control the action of the yarn clamping unit. The yarn clamping unit is arranged on the rack and is used for making action instructions to the yarns after the yarns are relaxed, so as to realize single control or double control or multiple control of the yarns passing through different channels.

[0007] Preferably, the yarn conveying unit comprises a jumper, a threading ring, and a rotating rod. The rotating rod is rotatably arranged on the rack. The jumpers are equidistantly arranged on the rotating rod. The threading rings are arranged at one end of each jumper away from the rotating rod.

[0008] Preferably, the alarm unit includes a microcontroller, a magnet, a first sensing point, and a second sensing point. The magnet is equidistantly mounted on the rotating rod and located between adjacent jumping rods. The first sensing point and the second sensing point are arranged counterclockwise around the axis of the rotating rod. The distance between the first sensing point and the magnet is smaller than the distance between the second sensing point and the magnet. The microcontroller is arranged inside the clamping unit.

[0009] Preferably, the yarn clamping unit includes a frame, a support plate, a driving component, a locking component, and a resetting component; the frame is installed on one side of the machine frame, and the support plate is installed inside the frame; the driving component is installed on the support plate and is used to drive the locking component; the locking component is installed on the output end of the driving component and is used to control the tension of the yarn in different channels; the resetting component is installed on the locking component and is used to cooperate with the locking component to reset.

[0010] Preferably, the driving component includes a synchronous motor and a drive shaft, with the synchronous motor arranged on the support plate and the drive shaft passing through the support plate and connecting to the synchronous motor.

[0011] Preferably, the locking element includes a fixed clamping plate, a movable clamping plate, and a cam. The fixed clamping plate is fastened to the support plate by bolts, the movable clamping plate is rotatably mounted on the support plate, and the cam passes through the drive shaft and is fixed to the drive shaft. The cam is located between the movable clamping plates that are symmetrical about the axis of the drive shaft.

[0012] Preferably, the cam is divided into an end portion and a side portion, with the end portion being furthest from the drive shaft axis and the side portion being closest to the drive shaft axis.

[0013] Preferably, the reset component includes a reset spring and a locking bolt, the locking bolt being mounted on each movable clamping piece, and the reset spring being mounted between the movable clamping pieces arranged symmetrically along the transmission axis, with both ends of the reset spring located between the locking bolt and the movable clamping pieces.

[0014] Preferably, when the end of the cam abuts against the adjacent movable clamping piece, the movable clamping piece and the fixed clamping piece are close to each other and are in a clamped state; when the adjacent movable clamping pieces on the side of the cam abut against each other, the movable clamping piece and the fixed clamping piece are far apart and are in a loose state.

[0015] Beneficial effects: 1. In this invention, each synchronous motor controls two movable clamping plates, thereby achieving simultaneous control of the left and right movable clamping plates. The synchronous motor drives the transmission shaft and cam to rotate. By relying on the direction and angle of the cam rotation, the distance between the movable clamping plate and the fixed clamping plate is changed, thereby clamping the yarn transmitted on both sides of the cam.

[0016] In this invention, the yarn transport channels located on the left and right sides of the cam can be clamped individually, or clamped simultaneously on both sides, or clamped synchronously to meet different needs.

[0017] In this invention, each synchronous motor independently controls the cam transmission, thereby enabling independent control of clamping and transmission of yarn at different workstations;

[0018] In the process of yarn transmission, if the transmitted yarn becomes loose or breaks, the present invention can promptly provide signal feedback, accurately locate the specific yarn transmission station, and clamp the loose or broken yarn in time. This allows the staff to promptly inspect and maintain the equipment, thereby ensuring the yarn remains taut during transmission, maintaining yarn tension, and further improving the processing quality of the finished product during the manufacturing process.

[0019] In this invention, the automatic alarm unit of the clamping unit automatically clamps the captured broken or loose yarn at the work station in a timely manner, avoiding the tedious disassembly and wiring by the staff during inspection and maintenance, and saving maintenance time. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0021] Figure 2 This is a schematic diagram illustrating the location and structure of the alarm unit in an embodiment.

[0022] Figure 3 This is a schematic diagram illustrating the structure of the clamping unit as seen from a top-down perspective, as an example.

[0023] Figure 4 This is an example diagram illustrating the location and structure of a microcontroller;

[0024] Figure 5 This is an example illustrating a cross-sectional view along the drive shaft axis;

[0025] Figure 6 This is a schematic diagram illustrating the end and side positions of the cam in an embodiment.

[0026] Figure 7 This is a schematic diagram illustrating the yarn clamping status of each channel in the example.

[0027] Figure 8 This is a schematic diagram illustrating the structure of the locking and resetting components from a top-down view, as shown in the example.

[0028] Reference numerals: 1. Frame; 2. Alarm unit; 3. Thread clamping unit; 4. Yarn feeding unit; 41. Jump bar; 42. Threading ring; 43. Rotating rod; 21. Microcontroller; 22. Magnet; 23. First sensing point; 24. Second sensing point; 31. Frame; 32. Support plate; 33. Driving component; 34. Locking component; 35. Reset component; 331. Synchronous motor; 332. Drive shaft; 341. Fixed clamp; 342. Movable clamp; 343. Cam; 3431. Side; 3432. End; 351. Return spring; 352. Locking bolt. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] This embodiment provides an automatic yarn clamping device for a computerized flat knitting machine. See [link / reference] Figures 1 to 8As shown, it includes: frame 1, alarm unit 2, yarn clamping unit 3, and yarn feeding unit 4; the yarn feeding unit 4 is arranged on the frame 1 and is used to transmit the yarn on the frame 1; the alarm unit 2 is arranged inside the frame 1, and when the yarn slacks or breaks, the alarm unit 2 responds to control the action of the yarn clamping unit 3; the yarn clamping unit 3 is arranged on the frame 1, and after the yarn slacks, the yarn clamping unit 3 issues an action command to the yarn, realizing single control, double control, or multiple control of the yarn passing through different channels.

[0034] Using the above basic structure, see [link / reference] Figure 1 As shown, the yarn feeding unit 4 includes a jump bar 41, a threading ring 42, and a rotating bar 43. The rotating bar 43 is rotatably arranged on the frame 1, the jump bars 41 are equidistantly arranged on the rotating bar 43, and the threading ring 42 is arranged at the end of each jump bar 41 away from the rotating bar 43.

[0035] The jumping bar 41 is fixed on the rotating rod 43, and the jumping bar 41 is as follows: Figure 1 It is L-shaped, with through holes on the threading ring 42 for the yarn to pass through. Under normal working conditions, each yarn is taut when passing through the threading ring 42. The tension of the yarn makes the angle between the jump rod 41 and the frame 1 small. However, when a fault occurs, the angle between the jump rod 41 and the frame 1 becomes larger. By observing the changes in the threading ring 42 and the rotation angle of the jump rod 41 on the rotating rod 43, it can be determined whether the transmitted yarn is loose or broken.

[0036] Using the above basic structure, see [link / reference] Figure 2 and Figure 4 As shown, the alarm unit 2 includes a microcontroller 21, a magnet 22, a first sensing point 23, and a second sensing point 24. The magnet 22 is equidistantly mounted on the rotating rod 43 and located between adjacent jumping rods 41. The first sensing point 23 and the second sensing point 24 are arranged counterclockwise around the axis of the rotating rod 43. The distance between the first sensing point 23 and the magnet 22 is smaller than the distance between the second sensing point 24 and the magnet 22. The microcontroller 21 is arranged inside the clamping unit 3.

[0037] The microcontroller 21 is a conventional technology in the existing field, used for control functions. The magnet 22 refers to an AlNiCo alloy (AlNiCo is an abbreviation for AlNiCo in English). Magnet 22 is composed of several hard, strong metals, such as iron, aluminum, nickel, and cobalt, and sometimes copper, niobium, and tantalum, used to make ultra-hard permanent magnet alloys. Magnetic induction sensors are installed at both the first sensing point 23 and the second sensing point 24 to provide signal feedback when magnet 22 is brought close. When the thread penetrating the threaded loop 42 on a certain jump bar 41 of the rotating rod 43 becomes loose, the rotating rod 43 rotates counterclockwise, and magnet 22 on the rotating rod 43 rotates to the first sensing point 23, triggering the magnetic induction sensor. The output signal is transmitted to the microcontroller 21, which outputs a clamping command to the clamping unit 3 to control the conveying yarn. When the magnet 22 rotates to the second sensing point 24, the yarn through which the threading ring 42 on the jump rod 41 passes is in a broken state, further increasing the clamping force on the conveyed yarn. By sensing the position of different sensing points, the tension and breakage status of the yarn during the conveying process can be obtained, so that the staff can maintain and repair the faulty equipment in a timely manner and ensure the product output rate. Each magnet 22 and jump rod 41 provides timely feedback on the broken or loose state of the yarn at the workstation.

[0038] Using the above basic structure, see [link / reference] Figure 3 , Figure 4 and Figure 5 As shown, the wire clamping unit 3 includes a frame 31, a support plate 32, a driving component 33, a locking component 34, and a resetting component 35. The frame 31 is installed on one side of the frame 1, and the support plate 32 is installed inside the frame 31. The driving component 33 is installed on the support plate 32 and is used to drive the locking component 34. The locking component 34 is installed on the output end of the driving component 33 and is used to control the tension of the yarn in different channels. The resetting component 35 is installed on the locking component 34 and is used to cooperate with the locking component 34 to reset.

[0039] The support plate 32 is fixed to the bottom of the frame 31, and the support plate 32 is also fixed to one side of the frame 1. The frame 31 is hollow, which facilitates heat dissipation and ventilation of the drive component 33 during daily use, improving its performance. The support plate 32 also provides good support for the drive component 33 during use. After receiving the instruction from the microcontroller 21, the drive component 33 locks itself to the locking component 34. The reset component 35 is connected to the locking component 34 to better reset and maintain the state when the locking component 34 returns to its original state.

[0040] Using the above basic structure, see [link / reference] Figure 5 As shown, the drive unit 33 includes a synchronous motor 331 and a drive shaft 332. The synchronous motor 331 is arranged on the support plate 32, and the drive shaft 332 passes through the support plate 32 and is connected to the synchronous motor 331.

[0041] Under the control of the microcontroller 21, the synchronous motor 331 drives the transmission shaft 332. The synchronous motors 331 are equidistantly arranged on the support plate 32. Each synchronous motor 331 can rotate in both forward and reverse directions. Each synchronous motor 331 and the microcontroller 21 are independently controlled and can rotate synchronously or independently.

[0042] Using the above basic structure, see [link / reference] Figure 8 As shown, the locking member 34 includes a fixed clamping piece 341, a movable clamping piece 342, and a cam 343. The fixed clamping piece 341 is fastened to the support plate 32 by bolts. The movable clamping piece 342 is rotatably mounted on the support plate 32. The cam 343 passes through the drive shaft 332 and is fixed to the drive shaft 332. The cam 343 is located between the movable clamping pieces 342 that are symmetrical about the axis of the drive shaft 332.

[0043] The fixed clamping piece 341 is fixed on the support plate 32, and the locking piece 34 is located on the back of the synchronous motor 331 placed on the support plate 32. One end of the movable clamping piece 342 rotates on the support plate 32, and the other end slides on the support plate 32. The channel between the movable clamping piece 342 and the fixed clamping piece 341 is the channel for yarn transmission. When the synchronous motor 331 drives the transmission shaft 332, the transmission shaft 332 drives the cam 343 to rotate. During the transmission process, the side of the cam 343 drives the contacting movable clamping piece 342 to deflect, thereby achieving the clamping of yarn in the single-sided channel or the double-sided channel.

[0044] Using the above-mentioned basic structure, such as Figure 6 As shown, the cam 343 is divided into an end portion 3432 and a side portion 3431. The end portion 3432 is furthest from the axis of the drive shaft 332, while the side portion 3431 is closest to the axis of the drive shaft 332.

[0045] When the cam 343 rotates along the axis of the drive shaft 332, one side end 3432 of the cam 343 presses the movable clamping piece 342 to deflect, thereby changing the distance between the fixed clamping piece 341 and the deflected movable clamping piece 342. The other side and the movable clamping piece 342 remain in contact position. The change in distance clamps the transmitted yarn. When the side 3431 of the cam 343 and the movable clamping piece 342 abut against each other, the yarn is smoothly transmitted along the distance between the fixed clamping piece 341 and the movable clamping piece 342.

[0046] Using the above basic structure, see [link / reference] Figure 8 As shown, the reset component 35 includes a reset spring 351 and a locking bolt 352. The locking bolt 352 is installed on each movable clamp 342, and the reset spring 351 is installed between the movable clamps 342 arranged symmetrically along the drive shaft 332. The two ends of the reset spring 351 are located between the locking bolt 352 and the movable clamps 342.

[0047] The return spring 351 pulls the movable clamping plates 342 on both sides together, so that the movable clamping plates 342 and the side 3431 of the cam 343 are always in contact, ensuring effective yarn transmission.

[0048] With the above basic structure, when the end 3432 of the cam 343 abuts against the adjacent movable clamping piece 342, the movable clamping piece 342 and the fixed clamping piece 341 approach each other and are in a clamped state; when the side 3431 of the cam 343 abuts against the adjacent movable clamping piece 342, the movable clamping piece 342 and the fixed clamping piece 341 move away from each other and are in a loose state.

[0049] The deflectable end of the movable clamp 342 matches the side arc of the fixed clamp 341. The two end faces clamp the yarn, which helps to clamp the transmitted yarn and improve the clamping force. Conversely, the gap reserved between the fixed clamp 341 and the movable clamp 342 facilitates the guidance and transmission of the yarn.

[0050] See Figure 7 As shown in the figure, there are four states: A, B, C, and D. State A indicates that the movable clamp 342 and the fixed clamp 341 clamp the yarn transmitted in the left channel, while the yarn in the right channel formed by the movable clamp 342 and the fixed clamp 341 is transmitted freely. State B indicates that the movable clamp 342 and the fixed clamp 341 clamp the yarn transmitted in the right channel, while the yarn in the left channel formed by the movable clamp 342 and the fixed clamp 341 is transmitted freely. States C and D indicate that the yarn in the channel formed between the movable clamp 342 and the fixed clamp 341 is clamped. The difference between states C and D is that the synchronous motor 331 rotates in one direction and in the other direction.

[0051] Each synchronous motor 331 controls two movable clamping plates 342, thereby achieving simultaneous control of the left and right movable clamping plates 342. The synchronous motor 331 drives the transmission shaft 332 and the cam 343 to rotate. By changing the direction and angle of the rotation of the cam 343, the distance between the movable clamping plates 342 and the fixed clamping plates 341 is changed, thereby automatically clamping the yarns transmitted on both sides of the cam 343. The automatic alarm unit 2 of the clamping unit 3 automatically clamps the workstations that capture broken or slack yarns in a timely manner, avoiding the tedious disassembly and wiring by the staff during inspection and maintenance, and saving maintenance time. The yarn transmission channels located on the left and right sides of the cam 343 can... It can automatically clamp independently or simultaneously from both sides to meet different needs. Each synchronous motor 331 independently controls the transmission of the cam 343, thus enabling independent control of clamping and transmission of yarn at different workstations. During yarn transmission, if the transmitted yarn becomes slack or breaks, it can promptly provide signal feedback, accurately locate the specific yarn transmission workstation, and clamp the slack or broken yarn in a timely manner. This allows staff to promptly inspect and maintain the equipment, ensuring the yarn remains taut during transmission and maintaining its tension, thereby further improving the processing quality of the finished product during manufacturing.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An automatic thread clamping device for a computerized flat knitting machine, characterized in that, Include: Frame (1), alarm unit (2), clamp wire unit (3) and yarn feeding unit (4); The yarn feeding unit (4) is arranged on the frame (1) for transmitting the yarn on the frame (1); The alarm unit (2) is arranged in the frame (1), and the yarn is loose or broken, and the alarm unit (2) responds to control the action of the clamp wire unit (3); The clamp wire unit (3) is arranged on the frame (1), and the clamp wire unit (3) is used to instruct the yarn to act after the yarn is loose, and the yarn is controlled by single control or double control or multiple control in different channels; The yarn feeding unit (4) comprises a jumper (41), a threading ring (42) and a rotating rod (43), the rotating rod (43) is rotatably arranged on the frame (1), the jumpers (41) are equidistantly arranged on the rotating rod (43), and the threading rings (42) are arranged at one end of each jumper (41) away from the rotating rod (43); The alarm unit (2) comprises a single-chip microcomputer (21), a magnetic steel (22), a first sensing point (23) and a second sensing point (24), the magnetic steel (22) is equidistantly mounted on the rotating rod (43) and located between the adjacent jumpers (41), the first sensing point (23) and the second sensing point (24) are arranged in the counterclockwise direction around the axis of the rotating rod (43), the distance between the first sensing point (23) and the magnetic steel (22) is less than the distance between the second sensing point (24) and the magnetic steel (22), and the single-chip microcomputer (21) is arranged in the clamp wire unit (3); The clamp wire unit (3) comprises a frame body (31), a supporting plate (32), a driving member (33), a locking member (34) and a reset member (35); The frame body (31) is mounted on one side of the frame (1), and the supporting plate (32) is mounted in the frame body (31); The driving member (33) is mounted on the supporting plate (32) and is used to drive the locking member (34) to drive; The locking member (34) is mounted on the output end of the driving member (33) and is used to control the tension state of the yarn in different channels; The reset member (35) is mounted on the locking member (34) and is used to reset the locking member (34); The locking member (34) comprises a fixed clamp (341), a movable clamp (342) and a cam (343), the fixed clamp (341) is fastened on the supporting plate (32) by bolts, the movable clamp (342) is rotatably mounted on the supporting plate (32), and the cam (343) penetrates the transmission shaft (332) and is fixed with the transmission shaft (332), and the cam (343) is located between the movable clamps (342) symmetrically arranged on the axis of the transmission shaft (332).

2. An automatic thread clamping device for a computerized flat knitting machine according to claim 1, characterized in that, The driving member (33) comprises a synchronous motor (331) and a transmission shaft (332), the synchronous motor (331) is arranged on the supporting plate (32), and the transmission shaft (332) penetrates the supporting plate (32) and is connected with the synchronous motor (331).

3. An automatic thread clamping device for a computerized flat knitting machine according to claim 1, characterized in that, The cam (343) is divided into an end portion (3432) and a side portion (3431), the end portion (3432) is farthest from the axis of the transmission shaft (332), and the side portion (3431) is closest to the axis of the transmission shaft (332).

4. An automatic thread clamping device for a computerized flat knitting machine according to claim 1, characterized in that, The reset member (35) comprises a reset spring (351) and a locking bolt (352), the locking bolt (352) is installed on each movable clamping piece (342), and the reset spring (351) is installed between the movable clamping pieces (342) arranged symmetrically along the transmission shaft (332), and the two ends of the reset spring (351) are located between the locking bolt (352) and the movable clamping piece (342).

5. An automatic thread gripper device for a computerized flat knitting machine according to claim 4, characterized in that, When the end portion (3432) of the cam (343) abuts against the adjacent movable clamping piece (342), the movable clamping piece (342) and the fixed clamping piece (341) are close to each other and in a wire clamping state; when the side portion (3431) of the cam (343) abuts against the adjacent movable clamping piece (342), the movable clamping piece (342) and the fixed clamping piece (341) are away from each other and in a wire loosening state.

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