Internal expansion core-pulling type cone yarn taking device

Abstract

The internal-expansion core-pulling type cone yarn taking device comprises a taking rod and a clamp, and the taking rod comprises a clamping jaw, a pull rod, a clamping spring, a first spring, a material rod base, a sleeve and a material rod head; a positioning groove is formed in the outer wall of the material rod head; a notch is radially formed in the upper end, close to the end surface, of the pull rod; under the action of the first spring, a lower end step of the pull rod is in contact with the upper end face of the material rod base for limiting, the lower end face of the pull rod is in contact with a bulge of the clamping jaw to unfold the clamping jaw, and the upper end face of the clamping jaw is in contact with the snap spring; the clamp comprises a positioning boss, a semicircular opening and a conical bowl-shaped body, the original operation process of workers is not changed when the manual clamp is matched with the material taking rod, and the problems that only one raw material can be manually taken each time, the same action is singly repeated, the efficiency is low, and the labor intensity of workers is large can be solved. When the automatic clamp is matched with the material taking rod, automatic equipment process operation can be achieved, production efficiency is greatly improved, production personnel are reduced, and benefits are greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of yarn dyeing and dewatering equipment, specifically relating to an internal expansion core-pulling yarn feeding device. Background Technology

[0002] Currently, yarn dyeing is a labor-intensive industry, with most processes requiring manual labor by multiple people. The factory environment is hot and humid, resulting in high physical exertion and high work intensity for workers.

[0003] The dyeing process for packaged yarn is as follows: raw material -- vat -- loading into the vat -- dyeing -- unloading from the vat -- dehydration -- packaging -- shipping.

[0004] This technology is mainly applied to the process between dewatering and packaging, which is currently primarily done manually. Existing dewatering machines have a storage section consisting of several cylindrical cavities, each capable of vertically stacking 1 to 4 yarns. Workers must load the unloaded yarn packages into the storage cavities. Due to the small gap between the storage cavities and the outer circumference of the yarn packages, tools cannot be used to quickly remove them; the dewatered yarns must be removed one by one from the cavities. To facilitate yarn package removal, the diameter of current dewatering machines for yarn packages cannot be too large, typically around 1.7-2 meters, and the storage cavities cannot be too deep, generally stacking 4 packages is ideal; otherwise, the difficulty of retrieving the yarn increases significantly. Therefore, dewatering machine capacity is generally small, resulting in high labor intensity and low efficiency for workers. Summary of the Invention

[0005] This invention provides an internally expanding core-pulling type bobbin yarn feeding device, which can realize automated equipment process operation. The invention of the internally expanding core-pulling type feeding device can increase the height of the storage cavity, increase the capacity of the existing dewatering machine, and improve the dewatering efficiency, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an internal expansion core-pulling type bobbin yarn feeding device, comprising a feeding rod and a clamp, wherein the feeding rod comprises a claw, a pull rod, a retaining spring, a first spring, a feeding rod base, a sleeve and a feeding rod head;

[0007] The material rod base is hollow, and three mounting slots and pin holes are evenly provided on the lower end face. The three claws are respectively installed in the slots of the material rod base by pins and can move freely with the pins as the axis. The claws are provided with protrusions that extend into the inner cavity of the material rod base. The outer wall of the material rod base is provided with a retaining spring groove, and the retaining spring is installed in the retaining spring groove of the material rod base.

[0008] The rod head is hollow and has a positioning groove on its outer wall. The rod base and the rod head are respectively installed at both ends of the sleeve. The pull rod is installed through the inner walls of the rod base, the sleeve, and the rod head. The pull rod has steps at both ends and a radial groove near the end face at the upper end. The first spring is installed between the upper step of the pull rod and the rod head, and the upper groove is higher than the upper end face of the rod head.

[0009] Under the action of the first spring, the lower end step of the pull rod contacts and limits the upper end surface of the material rod base. The lower end surface of the pull rod contacts the protrusion of the claw, unfolding the claw. The upper end surface of the claw contacts the retaining spring and is limited by the retaining spring to prevent free movement.

[0010] The clamp includes a positioning boss, a semi-circular opening, and a conical bowl-shaped body. The positioning boss can position and release the positioning groove, the semi-circular opening can position and release the groove opening, and the clamp can control the lifting and lowering of the semi-circular opening.

[0011] Preferably, the rod base and the rod head are both threadedly connected to the sleeve.

[0012] Preferably, the clamp is a manual clamp, including a discharge handle, a first cylindrical bolt, a guide chuck, a handle, a connecting rod, a second cylindrical bolt, a headless bolt, a second spring, and a ring spring; the guide chuck is composed of two semi-conical bowl-shaped bodies, with a circular groove on the outer circumference of the smaller end, and a first positioning boss on the inner wall of the smaller end; the ring spring is installed in the circular groove of the guide chuck; the handle is fixed to the small end face of the guide chuck, and the middle parts of both sides are connected by the connecting rod and can move freely; the second cylindrical bolt and the second spring are installed in a... The upper end face of the guide chuck on the side; the headless bolt is installed in the middle of the connecting rod; a first semi-circular opening is opened in the middle of the lower end of the unloading handle, and two guide holes are opened, with waist holes of equal size on both sides; the guide hole at the lower end of the unloading handle is installed in conjunction with the second cylindrical bolt and the second spring; the waist holes on both sides of the unloading handle are installed in conjunction with the headless bolt, and move up and down under the action of external force; when there is no external force, the guide chuck is combined together under the action of the annular spring, and the lower end face of the unloading handle is in contact with the upper end face of the guide chuck under the action of the second spring.

[0013] Preferably, the clamp is an automatic clamp, comprising a first cylinder body, a cylinder bracket, cylinder fingers, a clamp seat, a hook, a third cylindrical bolt, a clamp, a second cylinder body, a cylinder rod, a connecting block, a cylindrical pin, a guide bracket, and a guide cup; the first cylinder body and the cylinder fingers form a finger cylinder, the cylinder fingers being two symmetrical fingers that can move relative to each other to form a clamping and releasing state; the cylinder bracket is mounted on the finger cylinder, and the second cylinder body is fixedly mounted on the upper end of the cylinder bracket; the second cylinder body controls the cylinder rod to perform vertical linear movement, the cylinder rod is connected to the connecting block, and the connecting block is symmetrically mounted on both sides. The hook is L-shaped, consisting of a long vertical side and a short horizontal side. The long side has two guide holes at its upper end and a waist hole in the middle. The short side has a second semi-circular opening. The hook guide holes and the cylindrical pin are slidably fitted together. The clamping seat is symmetrically installed on both sides of the cylinder finger. The clamping seat has a second positioning boss on its inner wall. The clamp is connected to the clamping seat. The third cylindrical bolt is installed on the inner side of the upper end of the clamping seat, and the third cylindrical bolt engages with the waist hole of the hook, allowing it to move up and down with the cylinder rod. The guide bracket is installed at the lower end of the finger cylinder. The guide bowl is a conical guide bowl, installed at the lower end of the guide bracket.

[0014] Preferably, the cylinder bracket is provided with an external equipment mounting port.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When the manual clamp and the picking rod are used together, the original operation process of the worker is not changed. It can solve the problems of manual picking of only one raw material at a time, single repetitive actions, low efficiency, and high labor intensity.

[0017] 2. When automatic clamps and pick-up bars are used together, automated equipment processes can be achieved, which can greatly improve production efficiency, reduce production personnel, and significantly improve company profits.

[0018] 3. Based on the special characteristics of existing package yarn dyeing and dewatering processes, and taking advantage of the fact that package yarn dyeing requires the use of hollow dyeing tubes and lacks dedicated material handling tools and equipment, an internal expansion core-pulling material handling device was invented. By using this device in conjunction with a robotic arm and a gantry robot, it is not limited by the diameter of the dewatering machine, the height of the storage chamber, or the number of materials. Furthermore, the diameter of the storage area, the height of the storage chamber, and the number of materials in the existing dewatering machine can be increased, thereby improving the capacity and dewatering efficiency of the dewatering machine. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the material handling rod of the present invention;

[0020] Figure 2This is a schematic diagram of the sleeve structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the claw, snap ring, and bar base structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the connection structure of the claw, pull rod, and snap ring of the present invention;

[0023] Figure 5 This is a schematic diagram of the material rod head and positioning groove structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the tie rod and slot structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the claw, pull rod, first spring, material rod base, and material rod head of the present invention;

[0026] Figure 8 This is a schematic diagram of the manual clamp structure of the present invention;

[0027] Figure 9 This is a schematic diagram of the guide chuck and the first positioning boss structure of the present invention;

[0028] Figure 10 This is a schematic diagram of the automatic clamping structure of the present invention;

[0029] Figure 11 This is a schematic diagram of the clamp, guide bowl, and second positioning boss structure of the present invention.

[0030] In the diagram: 1. Claw; 2. Pull rod; 3. Snap ring; 4. First spring; 5. Material rod base; 6. Sleeve; 7. Material rod head; 8. Positioning groove; 9. Groove opening; 10. Unloading handle; 11. First cylindrical bolt; 12. Guide chuck; 13. Handle; 14. Connecting rod; 15. Second cylindrical bolt; 16. Headless bolt; 17. Second spring; 18. Ring spring; 19. First positioning boss; 20. First semi-circular opening; 21. First cylinder body; 22. Cylinder bracket; 23. Cylinder finger; 24. Fixture seat; 25. Hook; 26. Third cylindrical bolt; 27. Fixture; 28. Second cylinder body; 29. ​​Cylinder rod; 30. Connecting block; 31. Cylindrical pin; 32. Guide bracket; 33. Guide cup; 34. Second semi-circular opening; 35. Second positioning boss. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1-7 The present invention provides an internal expansion core-pulling type bobbin yarn feeding device, including a feeding rod and a clamp. The feeding rod includes a claw 1, a pull rod 2, a retaining spring 3, a first spring 4, a feeding rod base 5, a sleeve 6 and a feeding rod head 7.

[0033] The material rod base 5 is hollow, and its lower end face is evenly provided with three mounting slots and pin holes. The three claws 1 are respectively installed in the slots of the material rod base 5 by pins, and can move freely with the pins as the axis, so that the claws 1 can be unfolded and retracted. The claws 1 have a protrusion extending into the inner cavity of the material rod base 5, which can be unfolded by the bottom end of the pull rod 7 pressing against the protrusion, or the claws 1 can hang freely when the protrusion is not limited. The outer wall of the material rod base 5 is provided with a retaining spring groove, and the retaining spring 3 is installed in the retaining spring groove of the material rod base 5. The retaining spring 3 can play the role of positioning the upper end face of the claws 1, so as to position them after unfolding.

[0034] The material rod head 7 is hollow and has a positioning groove 8 on its outer wall. The positioning groove 8 facilitates the positioning boss of the clamp to position and release it, thereby lifting the entire material rod to remove it from the storage cavity and releasing it when it is put back into the storage cavity. The material rod base 5 and the material rod head 7 are respectively installed at both ends of the sleeve 6. The pull rod 2 is installed through the inner wall of the material rod base 5, the sleeve 6, and the material rod head 7. The pull rod 2 has steps at both ends and a radial groove 9 near the end face at the upper end. The clamp can be positioned and released through the semi-circular opening of the clamp through the groove 9. Thus, when the clamp is connected to the material rod, the pull rod 2 can be lifted and lowered, thereby realizing the operation control of the chuck 1. The first spring 4 is installed between the upper step of the pull rod 2 and the material rod head 7, and the upper groove 9 is higher than the upper end face of the material rod head 7.

[0035] Under the action of the first spring 4, the lower end step of the pull rod 2 contacts and limits the upper end surface of the material rod base 5. The lower end surface of the pull rod 2 contacts the protrusion of the claw 1, unfolding the claw 1. The upper end surface of the claw 1 contacts the retaining spring 3 and is limited by the retaining spring 3 to prevent free movement.

[0036] The clamp includes a positioning boss, a semi-circular opening, and a conical bowl-shaped body. The positioning boss can position and release the positioning groove 8, and the semi-circular opening can position and release the groove opening 9. The clamp can control the raising and lowering of the semi-circular opening. In use, the picking rod is placed vertically in the storage cavity. At this time, the chuck 1 is in the extended state. Then, the bobbins are put in sequentially along the picking rod. The diameter of the picking rod is designed to match the center hole diameter of the bobbin, so that the diameter of the picking rod is smaller than the center hole diameter of the bobbin, which facilitates the feeding of the bobbins. The bottom bobbins are blocked by the chuck 1. When the bobbins need to be removed after dehydration, the positioning boss of the clamp clamps the positioning groove. 8. Simultaneously, the semi-circular opening blocks the slot 9, lifting the pull rod 2 upwards a certain distance, causing the material-retrieving rod to pull out all the bobbins. The conical bowl-shaped body can straighten the pull rod 2, facilitating its smooth entry into the clamp. Then, by lifting the semi-circular opening, the pull rod 2 can be pulled upwards, causing the protrusion of the chuck 1 to lose its obstruction. Under the action of gravity and the pressure of the bobbins, it hangs freely and becomes upright, allowing the bobbins to fall and release the material. After completion, the pull rod 2 is released, and under the action of the first spring 4, the pull rod 2 returns to its original position. The chuck 1 continues to unfold, and the material-retrieving rod is placed into the storage cavity through the clamp. Then, the positioning boss is released from the positioning slot 8, and the cycle continues.

[0037] Please see Figure 1-3 , Figure 5 The rod base 5 and the rod head 7 are both threadedly connected to the sleeve 6. In this embodiment, the rod base 5, the rod head 7 and the sleeve 6 can be detached and installed, which also facilitates the installation of the pull rod 2 inside the sleeve 6.

[0038] Please see Figure 8-9The clamp is a manual clamp, comprising a discharge handle 10, a first cylindrical bolt 11, a guide chuck 12, a handle 13, a connecting rod 14, a second cylindrical bolt 15, a headless bolt 16, a second spring 17, and a ring spring 18. The guide chuck 12 consists of two semi-conical bowl-shaped bodies, with a circular groove on the outer circumference of the smaller end and a first positioning boss 19 on the inner wall of the smaller end. The ring spring 18 is installed in the circular groove of the guide chuck 12. The handle 13 is fixed to the smaller end face of the guide chuck 12, and on both sides... The middle parts are connected by the connecting rods 14 and can move freely; the second cylindrical bolt 15 and the second spring 17 are installed on the upper end face of the guide chuck 12 on one side; the headless bolt 16 is installed in the middle of the connecting rod 14; the lower end of the unloading handle 10 has a first semi-circular opening 20 and two guide holes, and equal-sized waist holes on both sides; the lower end guide hole of the unloading handle 10 is fitted with the second cylindrical bolt 15 and the second spring 17, and the waist holes on both sides of the unloading handle 10 are fitted with the headless bolt 16. The guide chuck 12 is assembled and moves up and down under external force. When there is no external force, the guide chuck 12 merges together under the action of the annular spring 18, and the lower end face of the unloading handle 10 is in contact with the upper end face of the guide chuck 12 under the action of the second spring 17. In this embodiment, when there is no external force, the guide chuck 12 merges together under the action of the annular spring 18, and the lower end face of the unloading handle 10 is in contact with the upper end face of the guide chuck 12 under the action of the spring. During use, the handle 13 is gripped tightly and moved towards the center to separate the guide chuck 12, allowing the material to be picked up. The rod (material rod head 7) clamps and engages the first positioning boss 19 of the guide chuck 12 into the positioning groove 8 of the material picking rod (material rod head 7), and engages the first semi-circular opening 20 of the unloading handle 10 into the upper end groove 9 of the material picking rod (pull rod 2). Release the grip and lift the material picking rod. When in the material dispensing position, lift the unloading handle 10 upward. The material picking rod (claw 1) stands upright and downward under the action of gravity to release the raw material fitted on the material picking rod. After the material dispensing is completed, lift the material picking rod to the storage position, grip the handle 13, and release the material picking rod to complete one material picking and dispensing process.

[0039] Please see Figure 10-11The clamp is an automatic clamp, comprising a first cylinder body 21, a cylinder bracket 22, cylinder fingers 23, a clamp seat 24, a hook 25, a third cylindrical bolt 26, a clamp 27, a second cylinder body 28, a cylinder rod 29, a connecting block 30, a cylindrical pin 31, a guide bracket 32, and a guide cup 33; the first cylinder body 21 and the cylinder fingers 23 form a finger cylinder, the cylinder fingers 23 being two symmetrical fingers that can move relative to each other to form a clamping and releasing state; the cylinder bracket 22 is mounted on the finger cylinder, and the second cylinder body 28 is fixedly mounted on the upper end of the cylinder bracket 22; the second cylinder body 28 controls the cylinder rod 29 to move upwards. The cylinder rod 29 is connected to the connecting block 30 in a linear motion. Cylindrical pins 31 are symmetrically installed on both sides of the connecting block 30. The hook 25 is L-shaped, including a long vertical side and a short horizontal side. The long side has two guide holes at its upper end and a waist hole in the middle. The short side has a second semi-circular opening 34. The guide holes of the hook 25 and the cylindrical pins 31 are slidably fitted together. The clamp seat 24 is symmetrically installed on both sides of the cylinder finger 23. The inner wall of the clamp 27 has a second positioning boss 35. The clamp 27 is connected to the clamp seat 24. The third cylindrical bolt 26 is installed on the inner side of the upper end of the clamp seat 24, and the third cylindrical bolt 26 matches the waist hole of the hook 25. The automatic gripper can move up and down with the cylinder rod 29. The guide bracket 32 ​​is installed at the lower end of the finger cylinder, and the guide bowl 33 is a conical guide bowl, which is installed at the lower end of the guide bracket 32. In this embodiment, the automatic gripper is installed on the robotic arm and moved to the storage position of the picking rod. The automatic gripper moves downward, and the conical guide bowl 33 straightens the picking rod with a position deviation and smoothly enters the gripper. The automatic gripper continues to move downward to the designated position, and the cylinder finger 23 drives the gripper seat 24, hook 25, and gripper 27 to move inward relative to each other to clamp the picking rod. The second positioning boss 35 on the inner wall of the gripper is engaged in the positioning groove 8 of the picking rod (picking rod head 7) and... The hook 25's short side second semicircular opening 34 engages with the upper slot 9 of the picking rod (pull rod 2). Then, the automatic clamp moves upward to the designated position, lifting the picking rod and then moving it to the feeding position. The cylinder rod drives the hook 25, connecting block 30, and cylindrical pin 31 to move upward. The picking rod (claw 1) stands upright downward under gravity to release the raw material fitted on the picking rod. After feeding is completed, the cylinder rod 9 drives the hook 25, connecting block 30, and cylindrical pin 31 to move downward, then lifts the picking rod to the storage position. The cylinder finger 23 drives the clamp seat 24, hook 25, and clamp 27 to move outward relative to each other to release the picking rod, completing one picking and feeding process.

[0040] Please see Figure 10 The cylinder bracket 22 is provided with an external equipment mounting port; in this embodiment, it is convenient to dock and install with robotic arms, gantry robots, etc.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A type of internally expanded core-pulling yarn feeding device, characterized in that, It includes a material picking rod and a clamp, wherein the material picking rod includes a claw (1), a pull rod (2), a retaining spring (3), a first spring (4), a material rod base (5), a sleeve (6), and a material rod head (7); The rod base (5) is hollow and has three mounting slots and pin holes evenly provided on its lower end face. The three claws (1) are respectively installed in the slots of the rod base (5) by pins and can move freely with the pins as the axis. The claws (1) have protrusions that extend into the inner cavity of the rod base (5). The outer wall of the rod base (5) is provided with a retaining spring groove, and the retaining spring (3) is installed in the retaining spring groove of the rod base (5). The rod head (7) is hollow and has a positioning groove (8) on its outer wall. The rod base (5) and the rod head (7) are respectively installed at both ends of the sleeve (6). The pull rod (2) is installed through the inner wall of the rod base (5), the sleeve (6), and the rod head (7). The pull rod (2) has steps at both ends and a groove (9) is provided radially at the upper end near the end face. The first spring (4) is installed between the upper step of the pull rod (2) and the rod head (7), and the upper groove (9) is higher than the upper end face of the rod head (7). Under the action of the first spring (4), the lower end step of the pull rod (2) contacts and limits the upper end surface of the material rod base (5). The lower end surface of the pull rod (2) contacts the protrusion of the claw (1), unfolding the claw (1). The upper end surface of the claw (1) contacts the retaining spring (3) and is limited by the retaining spring (3) to prevent free movement. The clamp includes a positioning boss, a semi-circular opening, and a conical bowl-shaped body. The positioning boss can position and release the positioning groove (8), the semi-circular opening can position and release the groove opening (9), and the clamp can control the lifting and lowering of the semi-circular opening.

2. The internal expansion core-pulling type bobbin yarn feeding device according to claim 1, characterized in that, The base (5) and the head (7) of the rod are both threadedly connected to the sleeve (6).

3. The internal expansion core-pulling type bobbin yarn feeding device according to claim 1, characterized in that, The clamp is a manual clamp, including a discharge handle (10), a first cylindrical bolt (11), a guide chuck (12), a handle (13), a connecting rod (14), a second cylindrical bolt (15), a headless bolt (16), a second spring (17), and a ring spring (18); the guide chuck (12) is composed of two semi-conical bowl-shaped bodies, with a circular groove on the outer circle of the smaller end, and a first positioning boss (19) on the inner wall of the smaller end; the ring spring (18) is installed in the circular groove of the guide chuck (12); the handle (13) is fixed to the small end face of the guide chuck (12), and the middle parts on both sides are connected by the connecting rod (14) and can move freely; the second cylindrical bolt (15) and the second spring (17) The guide chuck (12) is installed on the upper end face of one side; the headless bolt (16) is installed in the middle of the connecting rod (14); a first semi-circular opening (20) is opened in the middle part of the lower end of the unloading handle (10), and two guide holes are opened, and waist holes of equal size are opened on both sides; the guide hole at the lower end of the unloading handle (10) is installed in conjunction with the second cylindrical bolt (15) and the second spring (17); the waist holes on both sides of the unloading handle (10) are installed in conjunction with the headless bolt (16), and move up and down under the action of external force; when there is no external force, the guide chuck (12) is merged together under the action of the ring spring (18), and the lower end face of the unloading handle (10) is in contact with the upper end face of the guide chuck (12) under the action of the second spring (17).

4. The internal expansion core-pulling type bobbin yarn feeding device according to claim 1, characterized in that, The clamp is an automatic clamp, comprising a first cylinder body (21), a cylinder bracket (22), cylinder fingers (23), a clamp seat (24), a hook (25), a third cylindrical bolt (26), a clamp (27), a second cylinder body (28), a cylinder rod (29), a connecting block (30), a cylindrical pin (31), a guide bracket (32), and a guide cup (33); the first cylinder body (21) and the cylinder fingers (23) form a finger cylinder, the cylinder fingers (23) are two symmetrical fingers that can move relative to each other to form a clamping and releasing state; the cylinder bracket (22) is mounted on the finger cylinder, and the second cylinder body (28) is fixedly mounted on the upper end of the cylinder bracket (22); the second cylinder body (28) controls the cylinder rod (29) to move vertically, the cylinder rod (29) is connected to the connecting block (30), and the connecting block (30) has two sides The cylindrical pins (31) are symmetrically installed; the hooks (25) are L-shaped, including a vertical long side and a horizontal short side, with two guide holes at the upper end of the long side, a waist hole in the middle, and a second semi-circular opening (34) on the short side; the guide holes of the hooks (25) and the cylindrical pins (31) are slidably fitted together; the clamp seats (24) are symmetrically installed on both sides of the cylinder fingers (23); the inner wall of the clamps (27) has a second positioning boss (35); the clamps (27) are connected to the clamp seats (24); the upper inner side of the clamp seats (24) is fitted with the third cylindrical bolts (26), and the third cylindrical bolts (26) and the waist hole of the hooks (25) are fitted together, so as to move up and down with the cylinder rod (29); the guide bracket (32) is installed at the lower end of the finger cylinder; the guide bowl (33) is a conical guide bowl, and the guide bowl (33) is installed at the lower end of the guide bracket (32).

5. The internal expansion core-pulling type bobbin yarn feeding device according to claim 4, characterized in that, The cylinder bracket (22) is provided with an external equipment mounting port.

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