Automatic yarn bobbin shifting mechanism and control method for rewinding machine

Abstract

This invention discloses an automatic yarn repositioning mechanism for a winding machine. It includes a frame and a repositioning section. The repositioning section includes a base and a first-stage air extraction pipe vertically connected to the base. A rotating seat is rotatably sleeved around the first-stage air extraction pipe. Multiple hollow bosses for holding yarns containing translucent bobbins are fixed on the rotating seat. Each hollow boss has an outward-facing notch and a bottom through hole. A light source module and a photosensitive module, which are capable of being raised and lowered and are opposite to each other, and a splicing section for splicing yarns are connected to the frame. The control method includes: when the yarn in the bobbin is almost used up, the light from the light source module can pass through the notch on the hollow boss, the translucent bobbin, and the sparse yarn, which is then sensed by the photosensitive module. Subsequently, the winding machine can be controlled to decelerate and stop. The splicing section limits and fixes the yarn, cuts it, and then controls the repositioning of the bobbin and splices the new yarn with the limited and fixed yarn. This invention has the advantages of convenient operation for changing wound yarns and low equipment cost.

Description

Technical Field

[0001] This invention relates to the field of equipment related to rewinding machines, and in particular to an automatic yarn bobbin changing mechanism and control method for rewinding machines. Background Technology

[0002] A rewinding machine, also known as a winding machine or yarn rewinding machine, improves yarn tension, removes defects, and adjusts package size by rewinding large bobbins of yarn into smaller bobbins, thus facilitating subsequent weaving processes.

[0003] Existing rewinding machines typically use a ring around the yarn being wound, with a photoelectric sensor installed inside. When the wound yarn is used up, the photoelectric sensor stops detecting yarn, sending a signal to stop the machine. This process has a certain delay, which can cause the yarn ends to be wound into the machine. Subsequent splicing operations require finding the yarn ends, making the operation cumbersome. Furthermore, after the wound yarn is used up, it is necessary to manually replace it with new yarn and find the yarn ends of the two yarns for splicing, making the entire operation time-consuming and labor-intensive.

[0004] Therefore, existing rewinding machines have the problem of being cumbersome to change the yarn on the wound bobbins. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic yarn bobbin changing mechanism and control method for a winding machine. This invention has the advantage of making the operation of changing the wound yarn bobs more convenient.

[0006] The technical solution of the present invention: an automatic yarn bobbin changing mechanism for a rewinding machine, comprising a frame; a changing part extending to one side is connected to the frame, the changing part includes a base connected to one side of the frame, a vertical first suction pipe is fixedly connected to the base, a rotating seat is rotatably sleeved around the first suction pipe, and a rotating part for driving the rotating seat to rotate relative to the base is connected between the rotating seat and the base; the rotating seat is provided with a plurality of through holes evenly distributed in a ring around the first suction pipe, and a fixed connection is provided at the position corresponding to each through hole on the rotating seat. There are hollow bosses with upward convexity, which are used to position and hold the bobbin containing the light-transmitting yarn. Each hollow boss has a notch on the side facing the outside of the rotating seat. A connecting block is connected to the frame via a vertical lifting cylinder. A light source module and a photosensitive module are connected to the connecting block and are arranged opposite each other. The light source module is located directly below the through hole on the side closest to the frame. The top of the first air extraction pipe is higher than the top of the boss. A splicing part for splicing yarn is provided on one side between the top of the first air extraction pipe and the top of the boss.

[0007] In the aforementioned automatic yarn bobbin shifting mechanism for a rewinding machine, the rotating part includes a servo motor that is vertically fixedly connected to the base. A horizontally arranged drive gear is fixedly connected to the output shaft of the servo motor, and a driven gear that is fixedly connected to the bottom surface of the rotating seat is meshed with the drive gear.

[0008] In the aforementioned automatic yarn bobbin changing mechanism for the rewinding machine, a magnet is fixed on one side of each through hole on the bottom surface of the rotating base, and a magnetic proximity switch fixed on the base is provided directly below one of the magnets.

[0009] In the aforementioned automatic yarn shifting mechanism for a rewinding machine, the splicing part includes a mounting base. From top to bottom, an upper yarn guide, a splicer, and a lower yarn guide are sequentially distributed on one side of the mounting base. A driving block is fixedly connected between one side of the upper and lower yarn guides. The driving block is horizontally slidably connected to the mounting base towards the first air extraction pipe. A telescopic cylinder for driving the driving block to slide horizontally relative to the mounting base is connected between the driving block and the mounting base. Both the upper and lower yarn guides are provided with V-shaped take-up ends. Pneumatic clamps are connected to the bottom surface of each sheet; a pneumatic stop block for positioning and clamping the yarn is fixed on the top surface of the upper yarn sheet at the position corresponding to the take-up opening, and a pneumatic shear for cutting the yarn is fixed on the top surface of the lower yarn sheet at the position corresponding to the take-up opening; a second air extraction pipe is fixedly connected to the drive block, with the opening of the second air extraction pipe facing the cutting position of the pneumatic shear; the splicer is slidably connected to the mounting base in a horizontal direction toward the first air extraction pipe, and a linear module for driving the splicer to slide horizontally relative to the mounting base is connected between the splicer and the mounting base.

[0010] In the aforementioned automatic yarn bobbin changing mechanism for the rewinding machine, a horizontal disc is fixed on the rotating seat at the position corresponding to the top of the first air extraction pipe, and a V-shaped positioning port is provided on the edge of the disc facing each hollow boss.

[0011] In the aforementioned automatic yarn bobbin changing mechanism for the rewinding machine, the radius of the disc is less than or equal to the horizontal distance from the first air extraction pipe to the hollow boss.

[0012] In the aforementioned automatic yarn bobbin changing mechanism for the rewinding machine, a hollow insert is inserted into the top of the first suction pipe, and a frustum-shaped cap is integrally provided at the top of the insert. A conical suction groove is provided in the middle of the cap, and the bottom of the suction groove is connected to the inside of the insert.

[0013] In the aforementioned automatic yarn shifting mechanism for a rewinding machine, a plurality of shifting parts arranged horizontally are connected to one side of the frame; two horizontally arranged slide rails and a rack are connected to the frame, the two slide rails are distributed vertically at intervals, and a plurality of sliding sleeves fixed on the splicing part are slidably limited and sleeved on the outside of each slide rail; a drive gear is meshed on the rack, and a drive motor fixed on the splicing part is fixedly connected to the drive gear.

[0014] The control method for the automatic yarn shifting mechanism of the rewinding machine, as described above, includes the following steps: a. Manually fix and place the yarn containing the light-transmitting yarn tubes on all the hollow bosses on the rotating plate; b. Manually guide the yarn ends from the bobbins on the hollow bosses facing the machine frame to the rewinding machine; manually place the yarn ends from the bobbins on the remaining hollow bosses at the top of the No. 1 air extraction pipe, and start the No. 1 air extraction pipe to draw in the yarn ends and achieve positioning. c. Start the rewinding machine to begin winding the yarn, and start the vertical lifting cylinder on the frame to move the connecting block upward. The light source module at one end of the connecting block passes through the through hole of the rotating disk and enters the hollow boss facing the frame. d. When the yarn in the outer bobbin of the hollow boss facing the frame is almost used up, the yarn outside the light-transmitting bobbin will become sparse. At this time, the light from the light source module can pass through the notch on the hollow boss, the light-transmitting bobbin, and the sparse yarn outside the light-transmitting bobbin and be sensed by the photosensitive module set opposite to the light source module. Subsequently, the photosensitive module sends a signal to the controller, and the controller controls the rewinding machine to decelerate and stop. e. Subsequently, the controller controls the splicing part on the frame to pull and position the yarn between the outer bobbin yarn of the hollow boss facing the frame and the rewinding machine, and then cut it. f. The vertical lifting cylinder on the frame moves the connecting block downward, causing the light source module on the connecting block to exit downward from the through hole; then, the rotating part on the base controls the rotating disk to rotate, so that the next hollow boss moves to the position facing the frame and then the rotating disk stops. g. The splicing section pulls the yarn between the outer bobbin of the hollow boss facing the machine frame and the top of the No. 1 exhaust pipe and splices it with the previously pulled and positioned yarn. Finally, the splicing section loosens the spliced ​​yarn and starts the rewinding machine to continue winding the yarn.

[0015] In the aforementioned control method, in step d, after receiving the signal from the photosensitive module, the controller will wait for a certain delay before controlling the rewinding machine to decelerate and stop. The delay time is manually input into the controller.

[0016] Compared with the prior art, the present invention connects a through-beam photoelectric sensing module (which can be purchased from Shanghai Salo Textile Machinery Technology Co., Ltd., model 498Q-SLZ2) to the connecting block, consisting of a light source module and a photosensitive module arranged at intervals and opposite to each other. The light source module can be inserted into the hollow boss, so that the photosensitive module is located outside the yarn package. When the yarn outside the light-transmitting yarn package is almost used up, the photosensitive module can sense it and send a signal to the controller (the controller model can be FX2C-20MRD, Cortex-R8, or Cortex-M7) to realize the shutdown operation of the winding machine. At this time, the yarn is still connected between the light-transmitting yarn package and the winding machine, which facilitates the splicing operation between the yarn ends of the two yarn packages in the subsequent operation.

[0017] A vertical lifting cylinder connects the connecting block and the frame, enabling the connecting block to lift the photosensitive module and the light source module. After the light source module exits downwards from the through hole of the rotating seat, the rotating part drives the rotating seat to rotate relative to the base without interference. Furthermore, the rotating seat can sequentially reposition its multiple hollow protrusions during rotation, achieving automatic roll changing. When the rotating part moves, the servo motor on the base drives the drive gear to rotate, which in turn drives the driven gear fixed on the bottom surface of the rotating seat to rotate synchronously, thus achieving the rotation of the rotating seat relative to the base. During the rotation of the rotating seat relative to the base, when the magnetic induction switch fixed on the base senses the magnet on one side of the through hole, the magnetic induction switch transmits a signal to the controller, thereby stopping the servo motor. This ensures that the rotating seat rotates a specific angle each time it rotates relative to the base, achieving the sequential rotation and repositioning of the hollow protrusions.

[0018] A vertical suction pipe (No. 1) is installed on the base, with its top end positioned above the top of the hollow boss. The end of the yarn to be wound is placed on the top of the suction pipe, and suction pulls the yarn end upwards. A disc is fixed on the rotating base at the position corresponding to the top of the suction pipe. The disc has V-shaped positioning holes on its edge facing each hollow boss. The radius of the disc is less than or equal to the horizontal distance from the suction pipe to the hollow boss, ensuring the yarn end is vertical when taut, facilitating subsequent splicing. An insert tube is inserted into the top of the suction pipe, with a frustum-shaped cap integrally formed at its top. This allows the yarn drawn into the suction pipe to slide laterally at the cap position when the pipe rotates relative to it.

[0019] By connecting a splicing section for splicing yarn to the frame, the upper and lower guide plates in the splicing section can limit the yarn on the nearly used yarn bobbin and the yarn on the next roll of yarn, so that when the linear module drives the splicer to move, the yarn on the nearly used yarn bobbin and the yarn on the next roll of yarn can enter the splicing section better, thereby realizing the splicing operation after the yarn bobbin is changed.

[0020] By connecting multiple horizontally arranged transposition parts to one side of the frame, and enabling the splicing part to move horizontally back and forth relative to the frame, one splicing part can perform splicing operations on multiple transposition parts, thus saving equipment costs.

[0021] When the yarn package is almost used up, it can automatically identify and perform rewinding and splicing operations without much manual intervention, greatly simplifying the replacement of the wound yarn package; and it can perform splicing operations on multiple transposition sections through one splicing section, saving equipment costs.

[0022] Therefore, the present invention has the advantages of convenient operation for changing the wound yarn and low equipment cost. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a structural schematic diagram of the transposition section; Figure 3 This is an exploded view of the transposition section; Figure 4 This is a structural diagram of the base and the No. 1 extraction pipe. Figure 5 This is a schematic diagram of the splice joint structure; Figure 6 This is a schematic diagram of the optimized solution of the present invention; Figure 7 This is a schematic diagram of the back side of the splice portion in the optimized scheme of the present invention.

[0024] The labels in the attached diagram are: 1-Frame, 2-Base, 3-No. 1 extraction pipe, 4-Rotating seat, 5-Through hole, 6-Hollow boss, 7-Notch, 8-Vertical lifting cylinder, 9-Connecting block, 10-Light source module, 11-Photosensitive module, 12-Servo motor, 13-Drive gear, 14-Driven gear, 15-Magnetic piece, 16-Magnetic proximity switch, 17-Upper wire piece, 18-Splicer, 19- 20-Drive block, 21-Telescopic cylinder, 22-Cable take-up port, 23-Pneumatic clamp, 24-Pneumatic stop block, 25-Pneumatic shears, 26-Second suction pipe, 27-Linear module, 28-Disc, 29-Positioning port, 30-Insertion tube, 31-Top cap, 32-Suction groove, 33-Slide rail, 34-Rack and pinion, 35-Sliding sleeve, 36-Drive gear, 37-Drive motor, 38-Mounting base. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0026] Example 1. An automatic yarn shifting mechanism for a rewinding machine, configured as follows: Figures 1 to 5 As shown, the device includes a frame 1; a shifting part extending to one side is connected to the frame 1, the shifting part includes a base 2 connected to one side of the frame 1, a vertical first suction pipe 3 is fixedly connected to the base 2, a rotating seat 4 is rotatably sleeved on the first suction pipe 3, and a rotating part for driving the rotating seat 4 to rotate relative to the base 2 is connected between the rotating seat 4 and the base 2; the rotating seat 4 is provided with a plurality of through holes 5 evenly distributed in a ring around the first suction pipe 3, and a hollow protrusion 6 is fixedly connected to the rotating seat 4 at the position corresponding to each through hole 5. The hollow boss 6 is used to position and hold the bobbin containing the light-transmitting yarn. Each hollow boss 6 has a notch 7 on the side facing the outside of the rotating seat 4. The frame 1 is connected to the connecting block 9 by the vertical lifting cylinder 8. The connecting block 9 is connected to the light source module 10 and the photosensitive module 11, which are arranged opposite to each other. The light source module 10 is located directly below the through hole 5 on the side closest to the frame 1. The top of the first suction pipe 3 is higher than the top of the boss 6. A splicing part for splicing yarn is provided on one side between the top of the first suction pipe 3 and the top of the boss 6 and is connected to the frame 1.

[0027] Example 2. An automatic yarn shifting mechanism for a rewinding machine, configured as follows: Figures 1 to 5 As shown, the device includes a frame 1; a shifting part extending to one side is connected to the frame 1, the shifting part includes a base 2 connected to one side of the frame 1, a vertical first suction pipe 3 is fixedly connected to the base 2, a rotating seat 4 is rotatably sleeved on the first suction pipe 3, and a rotating part for driving the rotating seat 4 to rotate relative to the base 2 is connected between the rotating seat 4 and the base 2; the rotating seat 4 is provided with a plurality of through holes 5 evenly distributed in a ring around the first suction pipe 3, and a hollow protrusion 6 is fixedly connected to the rotating seat 4 at the position corresponding to each through hole 5. The hollow boss 6 is used to position and hold the bobbin containing the light-transmitting yarn. Each hollow boss 6 has a notch 7 on the side facing the outside of the rotating seat 4. The frame 1 is connected to the connecting block 9 by the vertical lifting cylinder 8. The connecting block 9 is connected to the light source module 10 and the photosensitive module 11, which are arranged opposite to each other. The light source module 10 is located directly below the through hole 5 on the side closest to the frame 1. The top of the first suction pipe 3 is higher than the top of the boss 6. A splicing part for splicing yarn is provided on one side between the top of the first suction pipe 3 and the top of the boss 6 and is connected to the frame 1.

[0028] The rotating part includes a servo motor 12 that is vertically fixedly connected to the base 2. A horizontally arranged drive gear 13 is fixedly connected to the output shaft of the servo motor 12. A driven gear 14 that is fixedly connected to the bottom surface of the rotating seat 4 is meshed with the drive gear 13.

[0029] A magnet 15 is fixed on one side of each through hole 5 on the bottom surface of the rotating base 4, and a magnetic proximity switch 16 fixed on the base 2 is provided directly below one of the magnets 15.

[0030] The splicing part includes a mounting base 38. From top to bottom, an upper thread guide 17, a splicer 18, and a lower thread guide 19 are sequentially distributed on one side of the mounting base 38. A driving block 20 is fixedly connected between one side of the upper thread guide 17 and the lower thread guide 19. The driving block 20 is slidably connected to the mounting base 38 in a horizontal direction toward the first suction pipe 3. A telescopic cylinder 21 for driving the driving block 20 to slide horizontally relative to the mounting base 38 is connected between the driving block 20 and the mounting base 38. Both the upper thread guide 17 and the lower thread guide 19 are provided with V-shaped take-up ports 22. The bottom surfaces of both the upper thread guide 17 and the lower thread guide 19 are connected to… There is a pneumatic clamp 23; a pneumatic stop block 24 for positioning and clamping the yarn is fixed on the top surface of the upper yarn guide plate 17 at the position corresponding to the take-up port 22, and a pneumatic shear 25 for cutting the yarn is fixed on the top surface of the lower yarn guide plate 19 at the position corresponding to the take-up port 22; a second air extraction pipe 26 is fixedly connected to the drive block 20, and the opening of the second air extraction pipe 26 faces the cutting position of the pneumatic shear 25; the splicer 18 is slidably connected to the mounting base 38 in a horizontal direction toward the first air extraction pipe 3, and a linear module 27 for driving the splicer 18 to slide horizontally relative to the mounting base 38 is connected between the splicer 18 and the mounting base 38.

[0031] A horizontal disc 28 is fixed on the rotating seat 4 at the top position of the first suction pipe 3. A V-shaped positioning port 29 is provided on the disc 28 facing the edge of each hollow protrusion 6.

[0032] The radius of the disk 28 is less than or equal to the horizontal distance from the first extraction pipe 3 to the hollow protrusion 6.

[0033] The top of the first suction pipe 3 is connected to a hollow insertion tube 30. The top of the insertion tube 30 is integrally provided with a frustum-shaped cap 31. The top cap 31 has a conical suction groove 32 in the middle. The bottom of the suction groove 23 is connected to the inside of the insertion tube 30.

[0034] The aforementioned control method for the automatic yarn shifting mechanism of the rewinding machine includes the following steps: a. Manually fix and place the bobbin yarn containing the light-transmitting yarn tubes on all the hollow protrusions 6 on the rotating disk 4. b. Manually guide the yarn ends from the bobbins on the hollow boss 6 facing the machine frame 1 to the rewinding machine; manually place the yarn ends from the remaining bobbins on the hollow boss 6 at the top of the first air extraction pipe 3, and start the first air extraction pipe 3 to draw in the yarn ends to achieve positioning. c. Start the rewinding machine to begin winding the yarn, and start the vertical lifting cylinder 8 on the frame 1 to move the connecting block 9 upward. The light source module 10 at one end of the connecting block 9 passes through the through hole 5 of the rotating disk 4 and enters the hollow boss 6 facing the position of the frame 1. d. When the yarn in the outer bobbin of the hollow boss 6 facing the frame 1 is almost used up, the yarn outside the light-transmitting bobbin will become sparse. At this time, the light from the light source module 10 can pass through the notch 7 on the hollow boss 6, and the light-transmitting bobbin and the sparse yarn outside the light-transmitting bobbin are sensed by the photosensitive module 11 which is set opposite to the light source module 10. Subsequently, the photosensitive module 11 sends a signal to the controller, and the controller controls the rewinding machine to decelerate and stop. e. Subsequently, the controller controls the splicing part on the frame 1 to pull and position the yarn between the outer bobbin yarn of the hollow boss 6 facing the frame 1 and the rewinding machine, and then cuts it. f. The vertical lifting cylinder 8 on the frame 1 moves the connecting block 9 downward, so that the light source module 10 on the connecting block 9 exits downward from the through hole 5; then, the rotating part on the base 2 controls the rotating disk 4 to rotate, so that the next hollow boss 6 moves to the position facing the frame 1 and then the rotating disk 4 stops. g. The splicing section pulls the yarn between the outer bobbin yarn of the hollow boss 6 facing the machine frame 1 and the top of the No. 1 air extraction pipe 3 and splices it with the previously pulled and positioned yarn. Finally, the splicing section loosens the spliced ​​yarn and starts the rewinding machine to continue winding the yarn.

[0035] In step d, after receiving the signal from the photosensitive module 11, the controller will wait for a certain period of time before controlling the rewinding machine to decelerate and stop. The delay time is manually input into the controller.

[0036] Example 3. An automatic yarn shifting mechanism for a rewinding machine, configured as follows: Figures 2 to 7As shown, the device includes a frame 1; a shifting part extending to one side is connected to the frame 1, the shifting part includes a base 2 connected to one side of the frame 1, a vertical first suction pipe 3 is fixedly connected to the base 2, a rotating seat 4 is rotatably sleeved on the first suction pipe 3, and a rotating part for driving the rotating seat 4 to rotate relative to the base 2 is connected between the rotating seat 4 and the base 2; the rotating seat 4 is provided with a plurality of through holes 5 evenly distributed in a ring around the first suction pipe 3, and a hollow protrusion 6 is fixedly connected to the rotating seat 4 at the position corresponding to each through hole 5. The hollow boss 6 is used to position and hold the bobbin containing the light-transmitting yarn. Each hollow boss 6 has a notch 7 on the side facing the outside of the rotating seat 4. The frame 1 is connected to the connecting block 9 by the vertical lifting cylinder 8. The connecting block 9 is connected to the light source module 10 and the photosensitive module 11, which are arranged opposite to each other. The light source module 10 is located directly below the through hole 5 on the side closest to the frame 1. The top of the first suction pipe 3 is higher than the top of the boss 6. A splicing part for splicing yarn is provided on one side between the top of the first suction pipe 3 and the top of the boss 6 and is connected to the frame 1.

[0037] The rotating part includes a servo motor 12 that is vertically fixedly connected to the base 2. A horizontally arranged drive gear 13 is fixedly connected to the output shaft of the servo motor 12. A driven gear 14 that is fixedly connected to the bottom surface of the rotating seat 4 is meshed with the drive gear 13.

[0038] A magnet 15 is fixed on one side of each through hole 5 on the bottom surface of the rotating base 4, and a magnetic proximity switch 16 fixed on the base 2 is provided directly below one of the magnets 15.

[0039] The splicing part includes a mounting base 38. From top to bottom, an upper thread guide 17, a splicer 18, and a lower thread guide 19 are sequentially distributed on one side of the mounting base 38. A driving block 20 is fixedly connected between one side of the upper thread guide 17 and the lower thread guide 19. The driving block 20 is slidably connected to the mounting base 38 in a horizontal direction toward the first suction pipe 3. A telescopic cylinder 21 for driving the driving block 20 to slide horizontally relative to the mounting base 38 is connected between the driving block 20 and the mounting base 38. Both the upper thread guide 17 and the lower thread guide 19 are provided with V-shaped take-up ports 22. The bottom surfaces of both the upper thread guide 17 and the lower thread guide 19 are connected to… There is a pneumatic clamp 23; a pneumatic stop block 24 for positioning and clamping the yarn is fixed on the top surface of the upper yarn guide plate 17 at the position corresponding to the take-up port 22, and a pneumatic shear 25 for cutting the yarn is fixed on the top surface of the lower yarn guide plate 19 at the position corresponding to the take-up port 22; a second air extraction pipe 26 is fixedly connected to the drive block 20, and the opening of the second air extraction pipe 26 faces the cutting position of the pneumatic shear 25; the splicer 18 is slidably connected to the mounting base 38 in a horizontal direction toward the first air extraction pipe 3, and a linear module 27 for driving the splicer 18 to slide horizontally relative to the mounting base 38 is connected between the splicer 18 and the mounting base 38.

[0040] A horizontal disc 28 is fixed on the rotating seat 4 at the top position of the first suction pipe 3. A V-shaped positioning port 29 is provided on the disc 28 facing the edge of each hollow protrusion 6.

[0041] The radius of the disk 28 is less than or equal to the horizontal distance from the first extraction pipe 3 to the hollow protrusion 6.

[0042] The top of the first suction pipe 3 is connected to a hollow insertion tube 30. The top of the insertion tube 30 is integrally provided with a frustum-shaped cap 31. The top cap 31 has a conical suction groove 32 in the middle. The bottom of the suction groove 23 is connected to the inside of the insertion tube 30.

[0043] The frame 1 is connected to a plurality of horizontally arranged transverse switching parts on one side; the frame 1 is connected to two horizontally arranged slide rails 33 and rack 34, the two slide rails 33 are distributed vertically at intervals, and each slide rail 33 is slidably limited and sleeved with a plurality of slide sleeves 35 fixed on the splicing part, and a drive gear 36 is meshed on the rack 34, and a drive motor 37 fixed on the splicing part is fixedly connected to the drive gear 36.

[0044] The aforementioned control method for the automatic yarn shifting mechanism of the rewinding machine includes the following steps: a. Manually fix and place the bobbin yarn containing the light-transmitting yarn tubes on all the hollow protrusions 6 on the rotating disk 4. b. Manually guide the yarn ends from the bobbins on the hollow boss 6 facing the machine frame 1 to the rewinding machine; manually place the yarn ends from the remaining bobbins on the hollow boss 6 at the top of the first air extraction pipe 3, and start the first air extraction pipe 3 to draw in the yarn ends to achieve positioning. c. Start the rewinding machine to begin winding the yarn, and start the vertical lifting cylinder 8 on the frame 1 to move the connecting block 9 upward. The light source module 10 at one end of the connecting block 9 passes through the through hole 5 of the rotating disk 4 and enters the hollow boss 6 facing the position of the frame 1. d. When the yarn in the outer bobbin of the hollow boss 6 facing the frame 1 is almost used up, the yarn outside the light-transmitting bobbin will become sparse. At this time, the light from the light source module 10 can pass through the notch 7 on the hollow boss 6, and the light-transmitting bobbin and the sparse yarn outside the light-transmitting bobbin are sensed by the photosensitive module 11 which is set opposite to the light source module 10. Subsequently, the photosensitive module 11 sends a signal to the controller, and the controller controls the rewinding machine to decelerate and stop. e. Subsequently, the controller controls the splicing part on the frame 1 to pull and position the yarn between the outer bobbin yarn of the hollow boss 6 facing the frame 1 and the rewinding machine, and then cuts it. f. The vertical lifting cylinder 8 on the frame 1 moves the connecting block 9 downward, so that the light source module 10 on the connecting block 9 exits downward from the through hole 5; then, the rotating part on the base 2 controls the rotating disk 4 to rotate, so that the next hollow boss 6 moves to the position facing the frame 1 and then the rotating disk 4 stops. g. The splicing section pulls the yarn between the outer bobbin yarn of the hollow boss 6 facing the machine frame 1 and the top of the No. 1 air extraction pipe 3 and splices it with the previously pulled and positioned yarn. Finally, the splicing section loosens the spliced ​​yarn and starts the rewinding machine to continue winding the yarn.

[0045] In step d, after receiving the signal from the photosensitive module 11, the controller will wait for a certain period of time before controlling the rewinding machine to decelerate and stop. The delay time is manually input into the controller.

[0046] Working principle: The operator manually places the positioning sleeves of the bobbin yarn onto the multiple hollow protrusions 6 on the rotating seat 4. The yarn ends of the bobbin yarn facing the frame 1 are led upwards to the rewinding machine. The yarn ends of the remaining bobbin yarns are pulled out, passing through the corresponding positioning ports 29 on the disc 28 and moving to the air extraction slot 32. Then, air is extracted through the first air extraction pipe 3 (the extraction action of the first air extraction pipe 3 can be controlled separately by a push-button switch, making it convenient for the operator to pull the yarn ends into the first air extraction pipe 3 after replacing the bobbin yarn). The yarn ends pass through the air extraction slot 32 of the top cap 31 and the hollow insertion tube 30 into the first air extraction pipe 3. At this time, the yarns corresponding to these yarn ends are vertically pulled taut and set between the bobbin yarn and the positioning ports 29. The operator manually calculates the delay time based on the light transmittance of the bobbin yarn and manually inputs the delay time into the controller. Delay time = yarn light transmittance. 60s.

[0047] Next, the winding machine begins to wind the yarn. The vertical lifting cylinder 8 on the frame 1 drives the connecting block 9 to rise, causing the light source module 10 and the photosensitive module 11 on the connecting block 9 to rise synchronously. The light source module 10 passes through the through hole 5 and enters the hollow boss 6 of the yarn package. When the yarn package is almost used up, the light emitted by the light source module 10 passes through the notch 7, the light-transmitting yarn package, and the sparse yarn, and is sensed by the photosensitive module 11, which is directly opposite it. The photosensitive module 11 sends a signal to the controller. After receiving the signal, the controller starts a countdown according to the previously set delay time. After the countdown ends, it controls the winding machine to decelerate and stop. At this time, the yarn package is vertically taut and set between the yarn package and the winding machine. Subsequently, the horizontally mounted telescopic cylinder 21 on the frame 1 drives the drive... Block 20 moves horizontally toward the first suction pipe 3, causing the take-up openings 22 on the upper and lower yarn guide plates 17 and 19 to simultaneously approach the yarn. Then, the pneumatic clamps 23 on the upper and lower yarn guide plates 17 and 19 simultaneously drive the clamping arms to rotate in opposite directions, drawing the yarn into the take-up opening 22. Subsequently, the pneumatic stop block 24 on the upper yarn guide plate 17 extends to limit the yarn within the take-up opening 22, and the second suction pipe 26 on the lower yarn guide plate 19 (the tail end of the second suction pipe 26 is connected to a retractable hose, allowing the second suction pipe 26 to extend and retract with the lower yarn guide plate 19) draws air to suck in part of the yarn, achieving yarn positioning. Then, the pneumatic shears 25 on the lower yarn guide plate 19 cuts the yarn. Finally, the two pneumatic clamps 23 reopen, and the telescopic cylinder 21 retracts to reset the drive block 20.

[0048] Next, the vertical lifting cylinder 8 drives the connecting block 9 to descend, causing the light source module 10 to exit the through hole 5 of the rotating seat 4 downwards. Subsequently, the servo motor 12 on the base 2 drives the drive gear 13 to rotate, and the drive gear 13 drives the driven gear 14 meshing on it and fixedly connected to the bottom surface of the rotating seat 4 to rotate, causing the rotating seat 4 to rotate relative to the base 2. When the magnetic induction proximity switch 16 senses the next magnet piece 15, the magnetic induction switch 16 transmits a signal to the controller, causing the controller to control the servo motor 12 to stop. Since there are magnet pieces 15 at the same position on one side of each through hole 5, the multiple magnet pieces 15 and the multiple through holes 5 are synchronously and evenly distributed in a ring on the rotating seat 4. At this time, the next bobbin yarn just moves to the position of the bobbin yarn that is about to run out of yarn, realizing the bobbin yarn feeding operation one by one. Because the top cap 31 is shaped like a frustum, during the rotation of the bobbin yarn relative to the first exhaust pipe 3, the yarn vertically positioned between the bobbin yarn and the positioning port 29 can slide smoothly laterally along the top cap, and the yarn end is not easily pulled out.

[0049] Next, the telescopic cylinder 21 extends and continues to drive the drive block 20 to move horizontally, clamping the pneumatic clamps 23 on the upper and lower yarn guides 17 and 19. At this time, the yarn between the new bobbin and the positioning port 29 is limited by the clamping arms on the pneumatic clamps 23. Subsequently, the telescopic cylinder 21 retracts and resets, and the clamping arms on the pneumatic clamps 23 pull the yarn backward. Then, the linear module 27 drives the splicer 18 to move horizontally, pushing the two yarns between the upper and lower yarn guides 17 and 19, so that both yarns are embedded in the splicing position of the splicer 18. Then, the splicer 18 splices the two yarns. Finally, the linear module 27 drives the splicer 18 to retract and reset, the two pneumatic clamps 23 open their clamping arms, restart the rewinding machine to wind the yarn, and the connecting block 9 also rises again, allowing the light source module 10 to enter the hollow boss 6 of the bobbin.

[0050] After the drive motor 37 fixed on the mounting base 38 in the splicing section can drive the drive gear 36 to rotate, the driven gear 36 can roll on the rack 34, and the sliding sleeve 35 fixed on the mounting base 38 can slide on the two horizontal slide rails 33 of the frame 1, so that the entire splicing section can move horizontally relative to the frame 1 and perform splicing operations on multiple horizontally distributed transverse parts on the frame 1 in sequence (a drag chain can be set between the rack 34 and one of the slide rails 33 for placing air pipes and wires).

Claims

1. An automatic yarn bobbin changing mechanism for a bobbin rewinding machine, comprising a frame (1); characterized in that: The frame (1) is connected to a shifting part extending to one side. The shifting part includes a base (2) connected to one side of the frame (1). A vertical first suction pipe (3) is fixedly connected to the base (2). A rotating seat (4) is rotatably sleeved on the first suction pipe (3). A rotating part for driving the rotating seat (4) to rotate relative to the base (2) is connected between the rotating seat (4) and the base (2). The rotating seat (4) is provided with a plurality of through holes (5) evenly distributed in a ring around the first suction pipe (3). A hollow boss (6) with an upward convex arrangement is fixedly connected to the rotating seat (4) at the position corresponding to each through hole (5). (6) A notch (7) is provided on the side of each hollow boss (6) facing the outside of the rotating seat (4) for positioning and placing the bobbin containing the light-transmitting yarn. A connecting block (9) is connected to the frame (1) by a vertical lifting cylinder (8). A light source module (10) and a photosensitive module (11) are connected to the connecting block (9) and are arranged opposite to each other. The light source module (10) is located directly below the through hole (5) on the side closest to the frame (1). The top of the first suction pipe (3) is higher than the top of the boss (6). A splicing part for splicing yarn is provided on one side between the top of the first suction pipe (3) and the top of the boss (6).

2. The automatic yarn shifting mechanism for a rewinding machine according to claim 1, characterized in that: The rotating part includes a servo motor (12) that is vertically fixedly connected to the base (2). A horizontally arranged drive gear (13) is fixedly connected to the output shaft of the servo motor (12). A driven gear (14) that is fixedly connected to the bottom surface of the rotating seat (4) is meshed on the drive gear (13).

3. The automatic yarn shifting mechanism for a rewinding machine according to claim 2, characterized in that: A magnet piece (15) is fixed on one side of each through hole (5) on the bottom surface of the rotating base (4), and a magnetic proximity switch (16) fixed on the base (2) is provided directly below one of the magnet pieces (15).

4. The automatic yarn shifting mechanism for a rewinding machine according to claim 1, characterized in that: The splicing part includes a mounting base (38). From top to bottom, an upper thread guide (17), a splicer (18), and a lower thread guide (19) are arranged on one side of the mounting base (38). A driving block (20) is fixedly connected between one side of the upper thread guide (17) and the lower thread guide (19). The driving block (20) is slidably connected to the mounting base (38) in a horizontal direction toward the first suction pipe (3). A telescopic cylinder (21) for driving the driving block (20) to slide horizontally relative to the mounting base (38) is connected between the driving block (20) and the mounting base (38). Both the upper thread guide (17) and the lower thread guide (19) are provided with V-shaped take-up ports (22). The bottom surfaces of both the upper thread guide (17) and the lower thread guide (19) have... A pneumatic clamp (23) is connected; a pneumatic stop block (24) for positioning and clamping the yarn is fixed on the top surface of the upper threading plate (17) at the position corresponding to the take-up port (22), and a pneumatic shear (25) for cutting the yarn is fixed on the top surface of the lower threading plate (19) at the position corresponding to the take-up port (22); a second air extraction pipe (26) is fixedly connected to the drive block (20), and the opening of the second air extraction pipe (26) faces the cutting position of the pneumatic shear (25); the splicer (18) is slidably connected to the mounting base (38) in the direction of the first air extraction pipe (3), and a linear module (27) for driving the splicer (18) to slide horizontally relative to the mounting base (38) is connected between the splicer (18) and the mounting base (38).

5. The automatic yarn shifting mechanism for a rewinding machine according to claim 1, characterized in that: A horizontal disc (28) is fixed on the rotating seat (4) at the top of the first suction pipe (3). A V-shaped positioning port (29) is provided on the edge of the disc (28) facing each hollow boss (6).

6. The automatic yarn shifting mechanism for a rewinding machine according to claim 5, characterized in that: The radius of the disk (28) is less than or equal to the horizontal distance from the first extraction pipe (3) to the hollow boss (6).

7. The automatic yarn shifting mechanism for a rewinding machine according to claim 1, characterized in that: The first suction pipe (3) has a hollow insertion tube (30) inserted at the top. The top of the insertion tube (30) is integrally provided with a frustum-shaped top cap (31). The top cap (31) has a conical suction groove (32) in the middle. The bottom of the suction groove (23) is connected to the inside of the insertion tube (30).

8. The automatic yarn shifting mechanism for a rewinding machine according to claim 1, characterized in that: The frame (1) is connected to a plurality of horizontally arranged transverse switching parts on one side; the frame (1) is connected to two horizontally arranged slide rails (33) and rack (34), the two slide rails (33) are arranged vertically and interspersed, and each slide rail (33) is slidably limited and sleeved with a plurality of slide sleeves (35) fixed on the splicing part. A drive gear (36) is meshed on the rack (34), and a drive motor (37) fixed on the splicing part is fixedly connected to the drive gear (36).

9. A control method for the automatic yarn shifting mechanism for a rewinding machine according to any one of claims 1-8, characterized in that: Includes the following steps, a. Manually fix and place the bobbin yarn containing the light-transmitting yarn tube outside all the hollow bosses (6) on the rotating disk (4); b. Manually guide the yarn ends in the bobbin yarn on the hollow boss (6) facing the machine frame (1) to the rewinding machine; manually place the yarn ends in the bobbin yarn on the remaining hollow boss (6) at the top of the first air extraction pipe (3), and start the first air extraction pipe (3) to draw in the yarn ends and achieve positioning. c. Start the rewinding machine to begin winding the yarn, and start the vertical lifting cylinder (8) on the frame (1) to move the connecting block (9) upward. The light source module (10) at one end of the connecting block (9) passes through the through hole (5) of the rotating disk (4) and enters the hollow boss (6) facing the frame (1). d. When the yarn in the outer bobbin of the hollow boss (6) facing the frame (1) is almost used up, the yarn outside the light-transmitting bobbin will become sparse. At this time, the light from the light source module (10) can pass through the notch (7) on the hollow boss (6), and the light-transmitting bobbin and the sparse yarn outside the light-transmitting bobbin are sensed by the photosensitive module (11) set opposite to the light source module (10). Subsequently, the photosensitive module (11) sends a signal to the controller, and the controller controls the rewinding machine to decelerate and stop. e. Subsequently, the controller controls the splicing part on the frame (1) to pull and position the yarn between the outer bobbin yarn of the hollow boss (6) facing the frame (1) and the rewinding machine, and then cuts it. f. The vertical lifting cylinder (8) on the frame (1) moves the connecting block (9) downward, so that the light source module (10) on the connecting block (9) exits downward from the through hole (5); then, the rotating part on the base (2) controls the rotating disk (4) to rotate, so that the next hollow boss (6) moves to the position facing the frame (1) and the rotating disk (4) stops. g. The splicing section pulls the yarn between the outer bobbin yarn of the hollow boss (6) facing the machine frame (1) and the top of the first air extraction pipe (3) and splices it with the yarn that was previously pulled and positioned. Finally, the splicing section loosens the yarn after splicing and starts the rewinding machine to continue winding the yarn.

10. The control method according to claim 9, characterized in that: In step d, after receiving the signal from the photosensitive module (11), the controller will wait for a certain period of time before controlling the rewinding machine to decelerate and stop. The delay time is manually input into the controller.

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