Traveller and winding-in device for ring spinning

Abstract

A steel ring threading and splicing device for ring spinning head, belong to ring spinning yarn automatic joint technical field, the present application in order to solve the existing technology in the steel ring threading process steel ring positioning unreliable and other problems. Including steel ring positioning device, steel ring positioning device includes crank, connecting rod, sliding block, air pipe and vacuum suction tube, guide is set on the shell before and after, sliding block and the guide sliding fit, drive rudder and the shell are connected, the one end of crank is connected with the output shaft of drive rudder, the other end of crank is sequentially articulated with sliding block through connecting rod, vacuum suction tube and air pipe are fixed on the left side of sliding block, the front part of air pipe is bent to right upper side, the front part of vacuum suction tube is bent downward, the front end suction hole of vacuum suction tube is located in the right upper side of the front end air hole of air pipe, steel ring positioning device is positioned to steel ring by the combination of suction and blowing, can make steel ring stop in the specified threading area.

Description

Technical Field

[0001] This invention belongs to the field of automatic splicing technology for ring spinning yarn, and particularly relates to a wire loop yarn threading and splicing device for ring spinning yarn starting. Background Technology

[0002] In ring spinning production, yarn breakage is a significant factor affecting yarn quality and spinning speed. To restore spinning operations, the textile industry often relies on a large number of operators to splice broken yarns. Achieving intelligent textile machinery and adopting automated splicing equipment to automatically splice broken yarns is a goal pursued by the textile machinery industry both domestically and internationally.

[0003] Existing automatic splicing methods both domestically and internationally are mainly divided into two types: splicing using the original spindle and splicing using a spare spindle. The spare spindle splicing method has been widely studied due to its high success rate and wide applicability. In the process of splicing using a spare spindle, the automatic yarn feeding of the traveler is a key technology for automatic splicing on ring spinning machines. Due to the limited operating space between the two yarn separators of adjacent spindles in the ring spinning machine (the distance between adjacent yarn separators is 70mm) and the inherent softness of the yarn, precise positioning of the traveler and the yarn feeding action are extremely difficult. Furthermore, during the overlap process between the broken yarn and the ring spinning machine rollers, the inability to twist the splice section during the overlap process results in insufficient twist at the connection point between the new yarn and the broken yarn on the rollers, affecting the overall yarn quality. Researchers have proposed several solutions to address these challenges.

[0004] Chinese invention patent CN116837501A discloses a wire ring yarn threading device for automatic splicing of ring spinning machines and its usage method. The device uses a semi-circular air channel, baffle, and electromagnet to determine the position and adjust the posture of the wire ring. The yarn is threaded into the wire ring by the cooperation of moving and stationary threading fingers. The drawbacks of this device are that the overall structure is relatively large and needs to be inserted deep into the spindle, which can easily cause mechanical interference with the ring, broken yarn tubes, and spindles. Another disadvantage is that the entire device needs to be installed on a guide rail. After assembling mechanical components such as the yarn spraying air pipe and the yarn feeding device, the overall structure has poor integration and places higher requirements on subsequent installation and deployment.

[0005] Chinese invention patent CN 113174669A discloses a robotic end effector for automatic splicing of ring-spun yarn. This method uses a ring-shaped airflow ring and an electromagnet to position the traveler, and employs a servo motor, a thread hook, and a control rod to form a horizontally taut section of yarn to complete the threading action. The drawbacks of this device are that its overall structure uses a mechanical multi-station design, requiring switching of mechanical tools for different actions, reducing work efficiency and device reliability. Mechanical interference is also prone to occur during multi-station switching and collaborative work. Another disadvantage is that this design mounts the end effector to a robotic arm, using an electromagnet for traveler positioning. After the robotic arm moves to switch stations, the traveler positioning device is removed. Due to the mechanical vibration of the spinning machine itself, it is impossible to guarantee that the traveler has a suitable opening space for the yarn to pass through.

[0006] The two inventions mentioned above, as well as some other related studies, all use the method of overlapping the yarn breakage point of the front roller for twisting. This method will cause the twist of the fine yarn at the breakage point to decrease, affecting the overall quality of the yarn. Summary of the Invention

[0007] The purpose of this invention is to provide a traveler threading and splicing device for ring spinning yarn starting, to solve problems such as unreliable traveler positioning and insufficient twist during traveler threading in the prior art. The technical solution adopted by this invention is as follows:

[0008] A wire traveler for threading and twisting yarn at the beginning of ring spinning includes a housing and a wire traveler positioning device, a yarn holding and threading device, and a twisting and twisting device integrated on the housing.

[0009] The wire ring positioning device includes a crank, a connecting rod, a slider, an air blowing pipe, and a vacuum suction pipe. The guide rail is set on the outer shell at the front and rear. The slider slides with the guide rail. The drive servo is connected to the outer shell. One end of the crank is connected to the output shaft of the drive servo. The other end of the crank is hinged to the slider in sequence through the connecting rod. The vacuum suction pipe and the air blowing pipe are fixed on the left side of the slider. The front part of the air blowing pipe is bent to the upper right. The front part of the vacuum suction pipe is bent downward. The air suction hole at the front end of the vacuum suction pipe is located to the upper right of the air blowing hole at the front end of the air blowing pipe.

[0010] The yarn holding and threading device includes a rocker arm, a fork, and a yarn outlet tube. The yarn outlet tube is fixed on the outer casing, with its outlet facing forward. The yarn outlet tube is located to the right of the air blowing tube. One end of the rocker arm is connected to the output shaft of the drive servo motor, and the other end of the rocker arm is connected to the upper end of the fork. The lower end of the fork is lower than the yarn outlet tube. When the rocker arm swings horizontally, the fork moves in an arc between the right side of the yarn outlet tube and the left side of the air blowing tube.

[0011] The twisting and bonding device includes a bidirectional limiting ring, which is sleeved on the shift fork. Both the upper and lower ends of the bidirectional limiting ring are provided with flange structures. When the shift fork moves to the left side of the air blowing pipe, the lower edge of the bidirectional limiting ring is higher than or flush with the axis of the yarn outlet tube. The line connecting the lower edge of the bidirectional limiting ring and the axis of the yarn outlet tube forms an angle β with the horizontal plane.

[0012] Furthermore, the front part of the air tube is bent to the right at a angle of 10° to 30°.

[0013] Furthermore, the front of the air tube is bent upwards at a 20° angle.

[0014] Furthermore, the included angle β ranges from 0° to 3°.

[0015] Furthermore, it also includes a yarn-cutting device, which includes a cutting cylinder and a blade. The cutting cylinder is fixed to the housing, and the piston rod of the cutting cylinder moves toward the path of the spare yarn. The blade is fixed to the piston rod of the cutting cylinder.

[0016] Furthermore, the working method of the wire loop yarn threading and splicing device includes the following steps:

[0017] Step 1: The spare yarn is ejected from the yarn tube and wound onto the yarn bobbin to complete the start-up process;

[0018] Step 2: Drive the servo motor to work, drive the rocker arm to swing, and then drive the shift fork from the right end of the arc motion path to the left end. During the movement, the shift fork pushes the spare yarn to the left and the spare yarn forms a loop yarn segment between the shift fork and the yarn outlet tube. At the same time, the crank rotates to drive the slider forward, and then drive the air blowing tube and vacuum suction tube forward.

[0019] Step 3: The wire loop yarn threading and wrapping device is moved to the right so that the air blowing pipe faces the upper left side of the steel ring and the threading yarn segment is attached to the front of the outer periphery of the steel ring.

[0020] Step 4: The airflow blown out by the air blowing pipe acts on the steel ring and forms a circulation. The steel wire loop slides along the steel ring under the action of the circulation. The vacuum suction pipe generates air suction force to pull the steel wire loop, so that the steel wire loop stays in the range of 0.5mm to 5mm on the right side of the air blowing pipe, and a yarn threading gap is formed between the outer end of the steel wire loop and the outer periphery of the steel ring.

[0021] Step 5: Move the steel wire loop yarn threading and winding device upward, causing the threading yarn segment to move upward and pass through the threading gap into the steel wire loop;

[0022] Step 6: Continue to move the wire loop yarn threading and splicing device upwards, and the spare yarn is disengaged from the fork;

[0023] Step 7: The yarn tube drives the spare yarn through the air ring and the yarn guide hook in sequence, and brings the spare yarn close to the front roller;

[0024] Step 8: Rotate the wire loop yarn threading and winding device so that the yarn outlet tube is below the air blowing tube and the bidirectional limiting ring is placed horizontally behind the spare yarn.

[0025] Step 9: Drive the servo motor to reverse, and the rocker arm will drive the bidirectional limit ring to swing upward. When the rocker arm swings to face the front roller, the bidirectional limit ring will push the spare yarn forward into the gap between the front roller and the ring spinning frame.

[0026] Step 10: Move the wire loop yarn threading and splicing device along the front roller axis so that the spare yarn slides into the broken yarn and splices with the broken yarn.

[0027] Furthermore, in step two, before the shift fork makes its arc-shaped movement, the wire loop threading and winding device is moved down by 2mm to 5mm.

[0028] Furthermore, in step two, before the shift fork makes its arc-shaped movement, the wire loop threading and winding device is moved down by 3mm.

[0029] Furthermore, in step four, the air supply pressure of the air blowing tube is less than or equal to 3 bar.

[0030] Furthermore, in step four, the absolute vacuum pressure of the vacuum suction tube is less than 100 Pa, and the suction speed is greater than or equal to 120 L / min.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] 1. The present invention uses a single drive servo motor as the power source for the wire traveler positioning device, the yarn holding and threading device, and the winding and twisting device. The wire traveler positioning device, the yarn holding and threading device, and the winding and twisting device are integrated into the housing, which simplifies the structure and reduces the number of moving parts. Through reasonable action design and layout planning, the device is suitable for operation in confined spaces, improving the success rate of wire traveler positioning and yarn threading after yarn breakage on the ring spinning machine.

[0033] 2. This invention adopts a yarn threading process that first positions the wire traveler, then adjusts the wire traveler's posture, and finally threades the yarn through the wire traveler. It uses a non-contact wire traveler positioning method, which avoids the rigid contact between the contact threading process and the wire traveler and the ring, thus extending the service life of the wire traveler and the ring.

[0034] 3. The present invention is equipped with a yarn breakage splicing device. The successfully spliced ​​yarn breakage is twisted once by the front roller, which improves the twist of the yarn breakage joint compared with the overlapping method. The yarn successfully spliced ​​by this method can meet the requirements of subsequent processes for fine yarn. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the structure of an existing ring spinning machine;

[0037] Figure 3 This is a schematic diagram of the invention using spare yarn to generate yarn heads;

[0038] Figure 4 This is a schematic diagram illustrating the formation of the looped yarn segment according to the present invention;

[0039] Figure 5 This is a frontal schematic diagram of the looped yarn segment formed in this invention;

[0040] Figure 6 This is a schematic diagram of the positioning wire ring of the present invention;

[0041] Figure 7 This is a schematic diagram of a steel wire coil undergoing planetary motion;

[0042] Figure 8 This is a schematic diagram of a vacuum suction tube sucking up a steel wire coil;

[0043] Figure 9 This is a schematic diagram showing how a vacuum suction tube pulls on the steel wire traveler to create a gap for threading the yarn.

[0044] Figure 10 This is a schematic diagram showing the air tube aligned with the upper surface of the steel collar;

[0045] Figure 11 This is a schematic diagram showing the state of the yarn segment passing through the steel wire loop;

[0046] Figure 12 This is a front view of step seven of the working method of the device of the present invention;

[0047] Figure 13 This is a front view of step nine of the working method of the device of the present invention;

[0048] Figure 14 yes Figure 12 Side view;

[0049] Figure 15 yes Figure 13 Side view;

[0050] Figure 16 This is a schematic diagram of the overlapping method in the existing technology.

[0051] In the diagram, 1. Roving, 2. Back roller, 3. Middle roller, 4. Front roller, 5. Yarn guide hook, 6. Air ring, 7. Ring, 8. Traveling wire, 9. Yarn cylinder, 10. Drive servo, 11. Crank, 12. Connecting rod, 13. Slider, 14. Air blower, 15. Vacuum suction tube, 16. Rocker arm, 17. Shift fork, 18. Bidirectional limit ring, 19. Yarn outlet tube, 20. Yarn suction tube, 21. Spare yarn, 22. Yarn separator, 23. Yarn threading segment. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0053] The connections mentioned in this invention are divided into fixed connections and detachable connections. Fixed connections, also known as non-detachable connections, include but are not limited to conventional fixed connection methods such as folded connections, riveted connections, adhesive connections, and welded connections. Detachable connections include but are not limited to conventional disassembly methods such as bolted connections, snap-fit ​​connections, pin connections, and hinged connections. When a specific connection method is not explicitly defined, it is assumed that at least one existing connection method can be found to achieve this function, and those skilled in the art can choose according to their needs. For example, a welded connection can be chosen for fixed connections, and a bolted connection can be chosen for detachable connections.

[0054] The present invention will be further described in detail below with reference to the accompanying drawings. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0055] Example: Figures 1 to 16 As shown, a traveler-driven yarn feeding and splicing device for ring spinning is described. The ring spinning is achieved using a ring spinning machine, which includes a back roller 2, a middle roller 3, a front roller 4, a guide hook 5, a balloon ring 6, a ring 7, travelers 8, and a bobbin 9. The roving 1 is sequentially drafted through the back roller 2, middle roller 3, and front roller 4, and drawn to a specified linear density. The roving then passes through the guide hook 5, the balloon ring 6, and the traveler 8 mounted on the ring 7, and finally winds onto the bobbin 9 attached to the spindle. The roving 1 is drawn to its finest point at the front roller 4, where yarn breakage is also common. When a yarn breakage occurs, the broken yarn is sucked away by the suction tube 20. The specific structure and operation of the ring spinning machine are existing technologies and will not be described further here.

[0056] The wire loop yarn threading and twisting device includes a housing and a wire loop positioning device, a yarn holding and threading device and a twisting and twisting device integrated on the housing.

[0057] The wire ring positioning device includes a crank 11, a connecting rod 12, a slider 13, an air blowing pipe 14, and a vacuum suction pipe 15. The guide rail is set on the outer shell at the front and rear. The slider 13 is slidably engaged with the guide rail. The drive servo motor 10 is connected to the outer shell. The output shaft of the drive servo motor 10 is set upward. One end of the crank 11 is connected to the output shaft of the drive servo motor 10. The other end of the crank 11 is hinged to the slider 13 in sequence through the connecting rod 12. The vacuum suction pipe 15 and the air blowing pipe 14 are fixed on the left side of the slider 13. The front part of the air blowing pipe 14 is bent to the upper right. The front part of the vacuum suction pipe 15 is bent downward. The air intake hole at the front end of the vacuum suction pipe 15 is located to the upper right of the air blowing hole at the front end of the air blowing pipe 14. The rear end of the vacuum suction pipe 15 is connected to the vacuum pump. The rear end of the air blowing pipe 14 is connected to the fan.

[0058] The yarn holding and threading device includes a rocker arm 16, a fork 17, and a yarn outlet tube 19. The yarn outlet tube 19 is fixed on the outer casing, and the outlet of the yarn outlet tube 19 is arranged facing forward. The yarn outlet tube 19 is located to the right of the air blowing tube 14. One end of the rocker arm 16 is connected to the output shaft of the drive servo motor 10, and the other end of the rocker arm 16 is connected to the upper end of the fork 17. The lower end of the fork 17 is lower than the yarn outlet tube 19. When the rocker arm 16 swings horizontally, the fork 17 moves in an arc between the right side of the yarn outlet tube 19 and the left side of the air blowing tube 14.

[0059] The twisting and winding device includes a bidirectional limiting ring 18, which is sleeved on the shift fork 17. Both the upper and lower ends of the bidirectional limiting ring 18 are provided with flange structures. When the shift fork 17 moves to the left side of the air blowing pipe 14, the lower edge of the bidirectional limiting ring 18 is higher than or flush with the axis of the yarn outlet tube 19. The line connecting the lower edge of the bidirectional limiting ring 18 and the axis of the yarn outlet tube 19 forms an angle β with the horizontal plane.

[0060] The front part of the air tube 14 is bent to the right at a angle of 10° to 30°.

[0061] The front part of the air tube 14 is bent upwards at 20°.

[0062] The included angle β ranges from 0° to 3°.

[0063] It also includes a yarn-cutting device, which includes a cutting cylinder and a blade. The cutting cylinder is fixed to the housing, and the piston rod of the cutting cylinder moves toward the spare yarn 21. The blade is fixed to the piston rod of the cutting cylinder and is used to cut the yarn after splicing.

[0064] This invention is installed on a six-degree-of-freedom collaborative robotic arm, and can also be installed on other six-degree-of-freedom serial, parallel, or hybrid large-range multi-degree-of-freedom motion bases to achieve position movement. The wire loop positioning device is used to position the wire loop 8. The positioning method of the wire loop positioning device is non-contact positioning. When the wire loop 8 needs to be positioned, the drive servo motor 10 drives the air blowing pipe 14 and vacuum suction pipe 15 forward through the slider 13. The airflow blown out by the air blowing pipe 14 acts on the steel ring 7 and forms a circulation, which can blow the wire loop 8 to slide on the steel ring 7. The air suction force generated by the vacuum suction pipe 15 can pull the wire loop 8 and form a yarn threading gap between the outer end of the wire loop 8 and the outer periphery of the steel ring 7. The wire loop positioning device positions the wire loop 8 by combining suction and air blowing, which can make the wire loop 8 stop in the designated yarn threading area. The yarn holding and threading device is used to clamp a section of spare yarn 21 and thread the spare yarn 21. 1. The yarn is threaded through the yarn threading gap into the wire guide 8; the twisting device is used to adjust the angle of the spare yarn 21 at the front roller 4 when twisting the spare yarn 21 with the broken yarn, to ensure that the spare yarn 21 can be smoothly twisted into the front roller 4. When twisting the spare yarn 21 with the broken yarn, since one end of the spare yarn 21 passes through the yarn guide hook 5 and the air ring 6 and is wrapped around the yarn tube 9, while the other end is still in the yarn outlet tube 19, the spare yarn 21 is in the yarn outlet tube 19 The exit point forms an acute angle, which is not conducive to the entry of the narrow space of the front roller 4. By driving the servo motor 10 to drive the rocker arm 16 to swing, it drives the bidirectional limiting ring 18 to move the spare yarn 21, so that the spare yarn 21 forms an approximately right angle at the front roller 4. This makes it easier to feed the spare yarn 21 into the gap between the front roller 4 and the ring spinning frame along the axial direction of the front roller 4, so that the spare yarn 21 can be smoothly spliced ​​with the broken yarn at the front roller 4. The mechanism composed of crank 11, connecting rod 12 and slider 13 is used to control the movement of air blowing pipe 14 and vacuum suction pipe 15, so that the wire traveler positioning device retracts when not in operation, so as to avoid mechanical interference with the yarn separator plate 22, the ring plate and other textile machinery accessories, and at the same time, make the overall structure of the invention more integrated. The vacuum suction pipe 15 is controlled by a pneumatic quick-opening and slow-closing valve group to adjust the position of the wire traveler 8 and prevent the wire traveler 8 from rebounding due to sudden changes in air pressure. The wire traveler positioning device, yarn holding and threading device, and winding and twisting device share a single drive servo motor 10 as a power source and are controlled via bus communication. The wire traveler positioning device, yarn holding and threading device, and winding and twisting device are integrated into the housing, which simplifies the structure and reduces the number of moving parts. Through reasonable motion design and layout planning, the device is suitable for operation in confined spaces, improving the success rate of wire traveler positioning and yarn threading after yarn breakage on the ring spinning machine.

[0065] This invention employs a yarn threading process that involves first positioning the wire traveler, then adjusting its posture, and finally threading the yarn through the wire traveler. This non-contact wire traveler positioning method avoids rigid contact between the wire traveler and the ring during the contact-type wiring process, thus extending the service life of the wire traveler and the ring.

[0066] This invention includes a yarn break splicing device. The successfully spliced ​​yarn break is twisted once by the front roller, which increases the twist of the yarn break joint compared to the overlapping method. Yarn successfully spliced ​​by this method can meet the requirements of subsequent fine yarn processes.

[0067] The working method of the steel wire loop yarn threading and winding splicing device includes the following steps:

[0068] Step 1: Spray the spare yarn 21 from the yarn tube 19 and wind it onto the yarn cylinder 9 to complete the start-up process;

[0069] Step 2: Drive the servo motor 10 to work, drive the rocker arm 16 to swing, and then drive the shift fork 17 from the right end of the arc motion path to the left end. During the movement, the shift fork 17 pushes the spare yarn 21 to the left. The spare yarn 21 forms a loop yarn segment 23 between the shift fork 17 and the yarn outlet tube 19. At the same time, the crank 11 rotates to drive the slider 13 to move forward, and then drive the air blowing tube 14 and the vacuum suction tube 15 to move forward.

[0070] Step 3: The wire loop yarn threading and wrapping device is moved to the right, so that the air blowing pipe 14 faces the upper left side of the steel ring 7, and the loop yarn segment 23 is attached to the front of the outer periphery of the steel ring 7.

[0071] Step 4: The airflow blown out by the air blowing pipe 14 acts on the steel ring 7 and forms a circulation. The steel wire ring 8 slides along the steel ring 7 under the action of the circulation. The vacuum suction pipe 15 generates air suction force to pull the steel wire ring 8, so that the steel wire ring 8 stays in the range of 0.5mm to 5mm to the right of the air blowing pipe 14, and a yarn threading gap is formed between the outer end of the steel wire ring 8 and the outer periphery of the steel ring 7.

[0072] Step 5: Move the steel wire loop yarn threading and winding device upward, driving the threading yarn segment 23 upward, and threading it into the steel wire loop 8 through the threading gap;

[0073] Step 6: Continue to move the wire loop yarn threading and winding device upward. Since the fork 17 is a cylinder, there is no structure at the lower end to limit the spare yarn 21, and one end of the spare yarn 21 has been completed and passed through the wire loop 8. The spare yarn 21 is removed from the fork 17.

[0074] Step 7: The yarn tube 19 drives the spare yarn 21 through the air ring 6 and the yarn guide hook 5 in sequence, and brings the spare yarn 21 close to the front roller 4;

[0075] Step 8: Rotate the wire loop yarn threading and winding device so that the yarn outlet tube 19 is below the air blowing tube 14 and the bidirectional limiting ring 18 is placed horizontally behind the spare yarn 21.

[0076] Step 9: Drive the servo motor 10 to reverse, and the rocker arm 16 drives the bidirectional limiting ring 18 to swing upward. When the rocker arm 16 swings towards the front roller 4, the bidirectional limiting ring 18 will push the spare yarn 21 forward into the gap between the front roller 4 and the ring spinning frame.

[0077] Step 10: Move the wire loop yarn threading and splicing device along the front roller 4 axis so that the spare yarn 21 slides into the broken yarn and splices with the broken yarn.

[0078] To ensure that the spare yarn 21 can be absolutely supported by the fork 17 to form the loop yarn segment 23, in step two, before the fork 17 makes an arc movement, the wire loop yarn threading and wrapping device is moved down by 2mm to 5mm to ensure the stable formation of the yarn threading area.

[0079] In step two, before the shift fork 17 makes an arc motion, the wire loop threading and winding device is moved down by 3mm.

[0080] In step four, the air supply pressure of the air pipe 14 is less than or equal to 3 bar.

[0081] In step four, the absolute vacuum pressure of vacuum straw 15 is less than 100 Pa, and the suction speed is greater than or equal to 120 L / min.

[0082] Figures 3-5 The process of forming loop yarn segment 23 is shown. Figure 3 The invention is shown in its position after the yarn is grown. At this time, the spare yarn 21 has been wound on the yarn spool 9, the slider 13 is at the rear end of its movement path, and the rocker arm 16 is at the right end of its swing path. Figure 4 The diagram illustrates the state in which the thread-holding and threading device forms the looped yarn segment 23. The drive servo motor 10 drives the fork 17 to move to the left in an arc motion via the rocker arm 16. When the fork 17 touches the spare yarn 21, it moves the spare yarn 21 to the left as well. The yarn between the fork 17 and the yarn outlet tube 19 forms the looped yarn segment 23. At the same time, the drive servo motor 10 drives the slider 13 to move forward via the crank 11. Consequently, the air blowing tube 14 and the vacuum suction tube 15 move forward with the slider 13, preparing for the subsequent positioning action of the wire loop 8. Figure 5 After the yarn-threading device forms the looped yarn segment 23, in the front view of the present invention, due to the restriction of the bidirectional limiting ring 18, the spare yarn 21 is in a horizontal state or tilted to the upper left at an angle β.

[0083] Figures 6-10 The working process of the 8-positioning action of the wire coil is demonstrated. Figure 6The diagram illustrates the positioning action of the wire loop 8. After the air blowing pipe 14 and the vacuum suction pipe 15 are pushed out, the mechanical arm brings the wire loop positioning device and the yarn holding and threading device close to the steel ring 7. At this time, the air outlet of the air blowing pipe 14 and the upper surface of the steel ring 7 are on the same plane. Figure 7 A simplified diagram of the planetary motion of the wire ring 8 shows that, regardless of the position of the wire ring 8 on the steel collar 7, air can be blown through the air blowing pipe 14, which is tangent to the steel collar 7, to the right side of the outlet of the air blowing pipe 14. Figure 8 and Figure 9 The process of vacuum suction tube 15 sucking up steel wire ring 8 is demonstrated. The present invention adopts a steel wire ring positioning method of positioning first and then adjusting the posture. After the air blowing tube 14 blows the steel wire ring 8 to the right side of the outlet of the air blowing tube 14, the vacuum tube 15 sucks the steel wire ring 8 outward. The steel wire ring 8 and the outer periphery of the steel ring 7 form a yarn threading gap, which facilitates the subsequent yarn threading action.

[0084] As shown in Figure 10, in order to position the wire ring 8, the air blowing pipe 14 and the vacuum suction pipe 15 can smoothly reach the predetermined position. The wire ring positioning device and the yarn holding and threading device need to be rotated so that the front end tilts downward at an angle θ. This angle θ is consistent with the vertical bending angle of the front of the air blowing pipe 14. The two cancel each other out so that the outlet axis of the air blowing pipe 14 and the upper surface of the wire ring 7 can be in the same plane.

[0085] The front part of the air tube 14 bends to the right at an angle α, as shown. Figure 7 As shown, this ensures that when the airflow is expelled from the air pipe 14, the airflow is divided into two parts along the left and right halves of the steel ring 7. The left half of the airflow is used to generate an annular airflow to propel the steel wire ring 8 into planetary motion, while the right half of the airflow is used to stop the movement of the steel wire ring 8, allowing it to stop 0.5–5 mm to the right of the outlet of the air pipe 14. This range allows for looping. When the air pressure is too high, the right half of the airflow cannot effectively stop the steel wire ring 8, and it will continue to undergo planetary motion. Therefore, the maximum air supply pressure of the air pipe 14 does not exceed 3 bar.

[0086] When the steel wire traveler positioning device enters the spindle position to position the steel wire traveler 8, the yarn holding and threading device carries the threading yarn segment 23 into the spindle position together. Since there is a relatively long seat at the bottom of the bidirectional limiting ring 18, the air pressure of less than 3 bar when the steel wire traveler 8 is positioned will not affect the tension of the threading yarn segment 23 itself or the position of the yarn. During the positioning process of the steel wire traveler 8, the threading yarn segment 23 is always tangent to the steel ring 7 and maintains a fixed length.

[0087] Because the yarn is flexible, the wire loop 8 does not need to be in the center of the front side of the collar. After the air tube 14 designed in this invention positions the wire loop 8, the wire loop 8 is located 3mm to 6mm to the left of the center of the front side of the collar 7. The wire loop 8 can be used for yarn feeding within this range. When the yarn holding and feeding device carries the yarn close to the collar 7, the threading yarn segment 23 will bend naturally and be tangential to the collar 7.

[0088] The control valve of the vacuum suction tube 15 is a vacuum-compatible switching valve, and butterfly valves are installed on both sides of the switching valve to form a pneumatic quick-opening and slow-closing valve assembly. After the position of the steel wire ring 8 is determined, the vacuum suction tube 15 starts to suck air, lifts the side of the steel wire ring 8, and then stops sucking air. At this time, due to the action of the quick-opening and slow-closing valve, the air pressure above the steel wire ring 8 drops slowly. This can avoid the rebound of the steel wire ring 8 caused by the sudden change in air pressure, so that the steel wire ring 8 can be stably sucked up by the vacuum suction tube 15.

[0089] Figure 11 This is a schematic diagram showing the state of the threading yarn segment 23 being inserted into the wire loop 8. After the wire loop 8 is positioned, the robotic arm drives the shift fork 17, the yarn outlet tube 19, and the threading yarn segment 23 to be lifted vertically upward. At this time, the threading yarn segment 23 naturally passes through the wire loop 8 through the threading gap, completing the threading action.

[0090] During the process of threading the loop yarn segment 23 into the steel wire loop 8, the robotic arm first lifts the device of the present invention by 10mm at a low speed to ensure the stability of the threading. At this time, the middle part of the loop yarn segment 23 has been threaded into the steel wire loop 8. Then, it is lifted at a faster speed by a distance of not less than 30mm. Since there is no mechanical limit below the shift fork 17, the spare yarn 21 can fall off the shift fork 17 naturally, thus completing the threading action.

[0091] Figures 12-15 The process of twisting and bonding was demonstrated. Figure 12 This is a front view of step seven of the operating method of the device of the present invention. Figure 14 yes Figure 12 Side view, Figure 12 and Figure 14 This demonstrates that after the yarn threading is completed, the spare yarn 21 passes through the air ring 6 and the guide hook 5 in sequence under the traction of the yarn outlet tube 19, and is lifted to the front roller 4. Since one end of the spare yarn 21 passes through the guide hook 5 and the air ring 6 and is wrapped around the yarn tube 9, while the other end is still inside the yarn outlet tube 19, the spare yarn 21 forms an acute angle at the outlet of the yarn outlet tube 19, which is not conducive to the entry of the narrow space of the front roller 4.

[0092] Figure 12 This is a front view of step nine of the operating method of the device of the present invention. Figure 15 yes Figure 13In the side view, in order to realize the winding action, the rocker arm 16 is driven to swing by the drive servo motor 10, which in turn drives the bidirectional limit ring 18 to move the spare yarn 21, so that the spare yarn 21 forms an approximately right angle at the front roller 4, which makes it easier to feed the spare yarn 21 into the gap between the front roller 4 and the ring spinning frame along the axial direction of the front roller 4, so that the spare yarn 21 and the broken yarn at the front roller 4 can be smoothly spliced.

[0093] After splicing is completed, the cutting cylinder drives the blade to cut the yarn, completing the yarn splicing action at the front roller 4.

[0094] Figure 16 The invention demonstrates the existing lap splicing method for joining broken yarns, where the spare yarn and the broken yarn are wrapped together to complete the joint. The proposed method involves twisting the spare yarn 21 at the front roller 4 after it is fed in, resulting in a more secure joint compared to the lap splicing method.

[0095] The above embodiments are merely illustrative examples of the present invention and do not limit its scope of protection. Those skilled in the art can make partial changes to them, as long as they do not exceed the spirit and essence of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A traveler threading and splicing device for ring spinning starting head, wherein ring spinning is achieved by a ring spinning machine, and the traveler threading and splicing device includes a housing and a traveler positioning device, a yarn holding and threading device and a splicing and twisting device integrated on the housing; The wire ring positioning device includes a crank (11), a connecting rod (12), a slider (13), an air blowing pipe (14), and a vacuum suction pipe (15). The guide rail is set on the outer shell at the front and back. The slider (13) slides with the guide rail. The drive servo (10) is connected to the outer shell. One end of the crank (11) is connected to the output shaft of the drive servo (10). The other end of the crank (11) is hinged to the slider (13) in sequence through the connecting rod (12). The vacuum suction pipe (15) and the air blowing pipe (14) are fixed on the left side of the slider (13). The front part of the air blowing pipe (14) bends to the upper right. The front part of the vacuum suction pipe (15) bends downward. The suction hole at the front end of the vacuum suction pipe (15) is located to the upper right of the air blowing hole at the front end of the air blowing pipe (14). The yarn holding and threading device includes a rocker arm (16), a fork (17), and a yarn outlet tube (19). The yarn outlet tube (19) is fixed on the outer casing. The outlet of the yarn outlet tube (19) is set facing forward. The yarn outlet tube (19) is located to the right of the air blowing tube (14). One end of the rocker arm (16) is connected to the output shaft of the drive servo motor (10). The other end of the rocker arm (16) is connected to the upper end of the fork (17). The lower end of the fork (17) is lower than the yarn outlet tube (19). When the rocker arm (16) swings horizontally, the fork (17) moves in an arc between the right side of the yarn outlet tube (19) and the left side of the air blowing tube (14). The winding and twisting device includes a bidirectional limiting ring (18), which is sleeved on the shift fork (17). Both the upper and lower ends of the bidirectional limiting ring (18) are provided with flange structures. When the shift fork (17) moves to the left side of the air blowing pipe (14), the lower edge of the bidirectional limiting ring (18) is higher than the axis of the yarn outlet tube (19) or flush with the axis of the yarn outlet tube (19). The line connecting the lower edge of the bidirectional limiting ring (18) and the axis of the yarn outlet tube (19) forms an angle β with the horizontal plane. It also includes a yarn breaking device, which includes a cutting cylinder and a blade. The cutting cylinder is fixed on the housing, and the piston rod of the cutting cylinder moves toward the spare yarn (21). The blade is fixed on the piston rod of the cutting cylinder. Its features are, The working method of the steel wire loop yarn threading and winding splicing device includes the following steps: Step 1: Spray the spare yarn (21) from the yarn tube (19) and wrap it around the yarn cylinder (9) to complete the start-up process; Step 2: Drive the servo motor (10) to work, drive the rocker arm (16) to swing, and then drive the shift fork (17) to move from the right end of the arc motion path to the left end. During the movement, the shift fork (17) pushes the spare yarn (21) to the left. The spare yarn (21) forms a loop yarn segment (23) between the shift fork (17) and the yarn outlet tube (19). At the same time, the crank (11) rotates to drive the slider (13) to move forward, and then drive the air blowing tube (14) and vacuum suction tube (15) to move forward. Step 3: The wire loop yarn threading and wrapping device is moved to the right so that the air blowing pipe (14) faces the upper left side of the steel collar (7) and the loop yarn segment (23) is attached to the front of the outer periphery of the steel collar (7). Step 4: The air blown out by the air blowing pipe (14) acts on the steel ring (7) and forms a circulation. The steel wire loop (8) slides along the steel ring (7) under the action of the circulation. The vacuum suction pipe (15) generates air suction to pull the steel wire loop (8) so that the steel wire loop (8) stays in the range of 0.5mm to 5mm to the right of the air blowing pipe (14) and forms a yarn threading gap between the outer end of the steel wire loop (8) and the outer periphery of the steel ring (7). Step 5: Move the wire loop yarn threading and winding device upward, driving the threading yarn segment (23) upward, and threading it into the wire loop (8) through the threading gap; Step 6: Continue to move the wire loop yarn threading and splicing device upwards, and the spare yarn (21) is disengaged from the fork (17); Step 7: The yarn tube (19) drives the spare yarn (21) through the air ring (6) and the yarn guide hook (5) in sequence, and brings the spare yarn (21) closer to the front roller (4). Step 8: Rotate the wire loop yarn threading and winding device so that the yarn outlet tube (19) is below the air blowing tube (14) and the bidirectional limiting ring (18) is placed horizontally behind the spare yarn (21). Step 9: Drive the servo motor (10) to reverse, and the rocker arm (16) drives the bidirectional limiting ring (18) to swing upward. When the rocker arm (16) swings towards the front roller (4), the bidirectional limiting ring (18) pushes the spare yarn (21) forward into the gap between the front roller (4) and the frame of the ring spinning machine. Step 10: Move the wire loop yarn threading and splicing device along the front roller (4) axis so that the spare yarn (21) slides into the broken yarn and splices with the broken yarn.

2. The device for threading and splicing yarn using a traveler for ring spinning starting as described in claim 1, characterized in that: The front part of the air tube (14) is bent to the right by 10° to 30°.

3. The device for threading and splicing yarn using a traveler in ring spinning as described in claim 2, characterized in that: The front part of the air tube (14) is bent upwards at 20°.

4. The device for threading and splicing yarn using a traveler for ring spinning starting as described in claim 1, characterized in that: The included angle β ranges from 0° to 3°.

5. The device for threading and splicing yarn using a traveler for ring spinning starting as described in claim 1, characterized in that: In step two, before the fork (17) makes an arc motion, the wire loop threading and winding device is moved down by 2mm to 5mm.

6. The device for threading and splicing yarn using a traveler at the beginning of ring spinning according to claim 5, characterized in that: In step two, before the fork (17) makes an arc motion, the wire loop threading and winding device is moved down by 3mm.

7. The device for threading and splicing yarn using a traveler for ring spinning starting as described in claim 1, characterized in that: In step four, the air supply pressure of the air pipe (14) is less than or equal to 3 bar.

8. The device for threading and splicing yarn using a traveler at the beginning of ring spinning according to claim 1, characterized in that: In step four, the absolute vacuum pressure of the vacuum pipe (15) is less than 100 Pa, and the suction speed is greater than or equal to 120 L / min.

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