A paper tube mounting mechanism, winding device, and winding machine for winding.

Abstract

This utility model discloses a paper tube mounting mechanism, a winding device, and a winding machine for winding, belonging to the technical field of winding devices in viscose filament production. The paper tube mounting mechanism is sleeved on the winding shaft of the winding machine, with a plug I at the end of the winding shaft. The paper tube mounting mechanism includes a tube core assembly, an adjusting assembly, a tube clamping fork, a plug II, and an elastic element I. The tube core assembly includes tubes I, II, and III sequentially sleeved on the winding shaft. When locked, the outer surface taper formed between tubes I, II, and III is equal to the inner surface taper of the paper tube. The adjusting assembly includes a pull rod and a pull tab. The tube clamping fork includes a clamping seat and a clamping strip on the clamping seat. The plug II is located on the right side of tube III, and the elastic element I is located between the plug II and the elastic element I. This design achieves locking or unlocking of the paper tube on the winding shaft, with a simple structure and convenient assembly; it effectively and firmly clamps the paper tube, reduces paper tube expansion and deformation, and improves the yield of standard rolls.

Description

Technical Field

[0001] This utility model relates to a paper tube mounting assembly, specifically a paper tube mounting mechanism for winding, which is sleeved on the winding shaft in a winding machine for mounting paper tubes, and belongs to the technical field of winding devices in viscose filament production. Background Technology

[0002] In the winding process, the yarn cake is wound into a tube of a specific shape, usually a conical tube. Before winding, the paper tube needs to be fixed to the winding shaft by the tube core assembly on the winding machine, and the yarn is clamped onto the paper tube in a specific manner; then, the paper tube rotates at high speed driven by the winding shaft; at the same time, the yarn forms a conical tube under the reciprocating motion of the yarn guide and the rotational motion of the paper tube.

[0003] Currently, bobbin core assemblies generally consist of a bobbin core, a retaining ring, a conical sleeve, and a clip. The bobbin core has internal grooves, and the clip secures it to the winding shaft by engaging these grooves, thus preventing overall deflection. Additionally, by changing the position of the small end of the bobbin core on the conical sleeve, the bobbin core is expanded to clamp the paper tube. However, the following shortcomings still exist:

[0004] 1. This structure uses a retaining ring to bind the core of the tube (e.g., CN2820887Y). If it is used repeatedly under high-speed rotation, the retaining ring will deform, resulting in insufficient binding force and displacement of the core of the tube. Under high speed, the conical tube may fall off or even fly away.

[0005] Second, in the initial state, because the bobbin core is located at the small end of the cone sleeve, it is in a contracted state and cannot clamp the paper tube. In order to clamp the paper tube, the bobbin core needs to be located at the large end of the cone sleeve, in an expanded state; and it needs to remain in this state during high-speed rotation to clamp the paper tube. This leads to wear on the components that keep the bobbin core in an expanded state during long-term use, and they may fail during high-speed rotation, causing the paper tube to loosen and fall off.

[0006] Third, improper installation of the cone sleeve can cause the core of the paper tube to open at an excessive angle, deforming the paper tube. If the paper tube deforms, the tube will have a square or other irregular shape, failing to meet tube standards, resulting in more waste tubes and reduced production quality.

[0007] Although the prior art CN212831854U discloses "an automatic winding roller changing device and a novel winding roller", its structure is relatively complex. It not only requires the cooperation of a pressure component, a first slide bar, a first linear drive device, a second linear drive device, and a push plate, but is also affected by the upper second main body, thus failing to guarantee the stability of the winding roller changing process. CN201296574Y discloses a paper tube plug and a paper tube top, with a short cylinder with a rim on the front side of the paper tube plug for securing the paper tube, but it does not solve the problem of how to conveniently load the paper tube and remove the conical cylinder.

[0008] Therefore, a device that is easy to operate, simple in structure, can firmly clamp the paper tube, and is easy to remove the conical cylinder is needed. Summary of the Invention

[0009] To overcome the shortcomings of existing technologies, a paper tube mounting mechanism, a winding device, and a winding machine for winding are proposed. In this technical solution, the paper tube is locked (installed) or released (removed from the conical tube) on the winding device through the coordinated arrangement of a tube core assembly, an adjusting assembly, a tube clamping fork, a plug, and elastic elements. This results in a simple structure, convenient assembly, time and labor savings, and ensures production efficiency. Furthermore, it effectively and firmly clamps the paper tube, reducing paper tube expansion and deformation, and increasing the yield of standard rolls to meet practical needs.

[0010] To achieve the above technical objectives, the following technical solution is proposed:

[0011] The primary objective of this technical solution is to provide: a paper tube mounting mechanism for winding, which is sleeved on the winding shaft in a winding machine, and the winding shaft has a plug I at its end; the paper tube mounting mechanism includes a tube core assembly, an adjusting assembly, a tube clamping fork, a plug II, and an elastic element I, wherein,

[0012] Boll tube core assembly: used for installing, loosening, or locking the paper tube. The boll tube core assembly includes boll tube I, boll tube II, and boll tube III, which are sequentially sleeved on the winding shaft. The right end face of boll tube I is fitted with the left end face of boll tube II, and the right end face of boll tube II is fitted with the left end face of boll tube III. The outer diameter of the left end of boll tube I is larger than the inner diameter of the paper tube.

[0013] When locked, the outer surface taper formed between bobbin I, bobbin II and bobbin III is equal to the inner surface taper of the paper tube, which facilitates better clamping of the paper tube, thereby providing stability and effectiveness of the winding process;

[0014] Adjustment assembly: Used to adjust the movement of the tube clamping fork and change its position on the winding shaft. The adjustment assembly includes a lever and a tab. One end of the tab is connected to the lever, and the other end is sleeved on the winding shaft, with the tab located to the left of the tube clamping fork. By applying force to the lever, the lever drives the tab to move towards the tube clamping fork, which in turn pushes the tube clamping fork towards the tube core assembly.

[0015] Pipe clamping fork: Used to push the plug II, changing the position of the plug II on the winding shaft. The pipe clamping fork includes a clamping seat and clamping strips provided on the clamping seat. The clamping seat is sleeved on the winding shaft and is located between the pull plate and the tube I; there are at least two clamping strips, evenly distributed on the clamping seat.

[0016] Plug II: Used to restrict the overall position of the bobbin core assembly (bobbin I, bobbin II, and bobbin III) on the winding shaft. It is moved on the winding shaft by the clamping fork. The plug is located on the right side of bobbin III, and the right end face of bobbin III is fitted with the left end face of plug II. The clamping strip passes through the inner side of bobbin I, bobbin II, and bobbin III in sequence, extends towards plug II, and abuts against plug II.

[0017] Elastic element I: Used to buffer the movement of plug II on the winding shaft. Elastic element I is sleeved on the winding shaft, with one end of elastic element I abutting against plug II, and the other end extending towards plug I, with the other end of elastic element I abutting against plug I.

[0018] Furthermore, the right end of the tube I is provided with an elastic element II, the right end of the tube II is provided with an elastic element III, and the right end of the tube III is provided with an elastic element IV. When the tubes I, II, and III are locked, the elastic elements II, III, and IV protrude from the outer surface formed between the tubes I, II, and III to clamp the paper tube and prevent deformation of the paper tube.

[0019] Furthermore, the inner diameter of elastic element II is greater than the inner diameter of elastic element III, which in turn is greater than the inner diameter of elastic element IV.

[0020] Furthermore, the elastic elements II, III, and IV are all double-hook annular tension springs.

[0021] Furthermore, the elastic element I is a compression spring.

[0022] Furthermore, the projected area of ​​the pull tab on the card holder (the contact area between the pull tab and the card holder) is smaller than the surface area on the left side of the card holder, ensuring the stability and effectiveness of force transmission.

[0023] Furthermore, the projected area of ​​the card strip on the plug II (the contact area between the card strip and the plug II) is smaller than the surface area on the left side of the plug II, ensuring the stability and effectiveness of force transmission.

[0024] Furthermore, the projected area of ​​the elastic element I on the plug II (the contact area between the elastic element I and the plug II) is smaller than the surface area on the right side of the plug II, ensuring the stability and effectiveness of force propagation.

[0025] Furthermore, the projected area of ​​the elastic element I on the plug I (the contact area between the elastic element I and the plug I) is smaller than the surface area on the left side of the plug I, ensuring the stability and effectiveness of force propagation.

[0026] Furthermore, the contact surfaces of tube I and tube II are inclined, the contact surfaces of tube II and tube III are inclined, and the contact surfaces of tube III and plug II are inclined. This arrangement facilitates the orderly and stable locking and unlocking of the tube core assembly and reduces wear between components.

[0027] The second objective of this technical solution is to provide: a winding device for winding a coil, including a winding shaft and the aforementioned paper tube mounting mechanism, wherein the paper tube mounting mechanism is sleeved on the winding shaft.

[0028] The third objective of this technical solution is to provide a winding machine, including a spindle box, a winding shaft and the aforementioned paper tube mounting mechanism, wherein one end of the winding shaft extends into the spindle box and the other end is fitted with the paper tube mounting mechanism.

[0029] The positional relationships involved in this technical solution, such as "middle", "upper", "end", "between", "right end", "left end", "outer side", "inner side", "one end", "the other end", "left side", and "right side", are defined according to the actual usage conditions and are conventional terms in this technical field, as well as conventional terms used by those skilled in the art in actual use.

[0030] The beneficial technical effects of adopting this technical solution are as follows:

[0031] I. This utility model, through the coordinated arrangement of a tube core assembly, an adjusting assembly, a tube clamping fork, a plug, and elastic elements, enables the locking (installation of paper tube) or loosening (removal of conical tube) of the paper tube on the winding device. The structure is simple, easy to assemble, saves time and labor, and ensures production efficiency; it effectively and firmly clamps the paper tube, reduces paper tube expansion and deformation, and increases the yield of standard tubes; and it facilitates the removal of the conical tube, effectively improving winding efficiency to meet practical needs.

[0032] Second, this utility model adopts a three-section tube core assembly, which facilitates the assembly of the paper tube installation mechanism, and at the same time, facilitates the locking and unlocking of the paper tube. The structure is simpler and more reliable, with low processing cost, low failure rate, and convenient maintenance.

[0033] 3. In its original state, since no external force is received, the elastic element I pushes the plug II towards the tube core assembly according to its own elastic force. That is, the plug II transmits the elastic force to the tube core assembly, and the tubes I, II and III contract (ends overlap); and the elastic elements II, III and IV are exposed to the outside of the side. At this time, the expanded elastic elements II, III and IV lock the paper tube, ensuring that the paper tube is in a locked state, without the need for an additional mechanism to fix the paper tube.

[0034] Fourth, the core assembly of the middle tube of this utility model has an integral circular structure, which can more firmly clamp the paper tube under high-speed rotation, reducing the situation of paper tube falling off or flying due to insufficient binding force. In contrast, the existing technology (such as the long strip three-lobed core tube) often causes the spring to lose binding force and disintegrate under high-speed rotation.

[0035] Fifth, in this utility model, when the core assembly is clamped, its shape fits the paper tube better, and the paper tube will not be deformed due to rough tightening, resulting in a degradation in the quality of the tube (appearance). Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the locking state of this utility model;

[0037] Figure 2 This is a schematic diagram of the released state of this utility model;

[0038] Figure 3 This is a schematic diagram of the assembled (unassembled) cylinder I, cylinder II, and cylinder III of this utility model.

[0039] Figure 4 This is a schematic diagram of the paper tube structure in this utility model;

[0040] Figure 5 This is a schematic diagram of the adjustment component in this utility model;

[0041] Figure 6 This is a front view of the tube clamp fork in this utility model;

[0042] Figure 7 This is a side view of the tube fork in this utility model;

[0043] Figure 8 This is a schematic diagram of the structure of plug II in this utility model;

[0044] In the figure, 1. Borehole core assembly, 11. Borehole I, 12. Borehole II, 13. Borehole III, 14. Elastic element II, 15. Elastic element III, 16. Elastic element IV; 2. Adjustment assembly, 21. Pull rod, 22. Pulling plate; 3. Pipe clamping fork, 31. Clamping seat, 32. Clamping strip; 4. Plug II; 5. Elastic element I; 6. Winding shaft; 7. Plug I; 8. Spindle box; 9. Fixing seat. Detailed Implementation

[0045] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0046] Example 1

[0047] A paper tube mounting mechanism for winding machines is sleeved on a winding shaft 6 in a winding machine. The winding shaft 6 has a plug I7 at its end (the end of the winding shaft 6, specifically the end of the winding shaft 6 furthest from the spindle box 8; the plug I7 can be a bolt). The paper tube mounting mechanism includes a tube core assembly 1, an adjusting assembly 2, a tube clamping fork 3, a plug II4, and an elastic element I5, such as... Figure 1-2 As shown, where,

[0048] Paper tube core assembly 1: Used for installing, loosening, or locking the paper tube. For example... Figure 3 As shown, the bobbin core assembly 1 includes bobbins I11, II12, and III13 sequentially sleeved on the winding shaft 6. The right end face of bobbins I11 and the left end face of bobbins II12 are fitted together, the right end face of bobbins II12 and the left end face of bobbins III13 are fitted together, and the right end face of bobbins III13 and the left end face of plug II4 are fitted together. For example, the contact surfaces of bobbins I11 and II12 are inclined, the contact surfaces of bobbins II12 and III13 are inclined, and the contact surfaces of bobbins III13 and plug II4 are inclined. This arrangement facilitates the movement (sliding) between bobbins I11, II12, and III13, thereby ensuring the orderly and stable locking or unlocking of the bobbin core assembly 1 and reducing wear between components. In addition, in order to facilitate better fit between cylinder I11, cylinder II12 and cylinder III13, a horizontal or vertical surface can be provided at the front or rear end of the inclined contact front, as long as it can ensure stable locking or loosening between cylinder I11, cylinder II12 and cylinder III13.

[0049] The outer diameter of the left end of bobbin I11 is larger than the inner diameter of the paper tube to prevent excessive movement of the paper tube and to allow it to slide outside the bobbin core assembly 1, thus improving the stability of the paper tube installation; when locked, the taper of the outer surface formed between bobbin I11, bobbin II12, and bobbin III13 is equal to that of the paper tube (e.g., ...). Figure 4 The tapered inner surface (as shown) facilitates better clamping of the paper tube, thereby providing stability and effectiveness in the winding process;

[0050] Adjustment component 2: Used to adjust the movement of the tube clamping fork 3, changing its position on the winding shaft 6. For example... Figure 5 As shown, the adjusting assembly 2 includes a lever 21 and a tab 22. One end of the tab 22 is connected to the lever 21, and the other end is sleeved on the winding shaft 6. The tab 22 is located to the left of the tube clamping fork 3. By applying a force to the lever 21, the lever drives the tab 22 to move towards the tube clamping fork 3, thereby causing the tab 22 to push the tube clamping fork 3 towards the tube core assembly 1. To realize the action relationship between the lever 21 and the plate 22, the following configuration can be provided: a fixed seat 9 is provided on the spindle box 8 in the winding machine, one end of the lever 21 is sleeved on the fixed seat 9, and the lever 21 and the fixed seat 9 are movably connected (the lever 21 can rotate on the fixed seat 9), and one end of the plate 22 is sleeved on the lever 21. When the lever 21 is rotated, the lever is subjected to external force, and the lever drives the plate 22 to move towards the pipe clamping fork 3, thereby exerting a force on the pipe clamping fork 3 and moving the pipe clamping fork 3; the direction of movement of the plate 22 can be achieved by adjusting the relative position between the lever and the plate 22.

[0051] Pipe clamping fork 3: Used to push the plug II4, changing the position of the plug II4 on the winding shaft 6. For example... Figure 6-7 As shown, the tube clamping fork 3 includes a clamping seat 31 and clamping strips 32 disposed on the clamping seat 31. The clamping seat 31 is sleeved on the winding shaft 6 and is located between the pull plate 22 and the tube I11. There are at least two clamping strips 32, which are evenly distributed on the clamping seat 31.

[0052] Plug II4: Used to restrict the position of the entire bobbin core assembly 1 (bobbin I 11, bobbin II 12, and bobbin III 13) on the winding shaft 6. It is moved on the winding shaft 6 by the clamping fork 3. The plug is located on the right side of bobbin III 13. The clamping strip 32 passes sequentially through the inner sides of bobbin I 11, bobbin II 12, and bobbin III 13, extending towards the plug II4, and abuts against the plug II4. In one specific embodiment, the plug II4 is shaped as follows... Figure 8 As shown, as long as it can be fitted onto the winding shaft 6, its left side can cooperate with and abut against the locking strip 32 and the tube Ⅲ13; its right side can cooperate with the elastic element Ⅰ5 (for example, the plug Ⅱ4 has a locking groove on the right side for limiting the elastic element Ⅰ5, and the left side of the elastic element Ⅰ5 is fitted into the locking groove to improve the stability of the elastic element Ⅰ5 when it contracts), and abut against each other, thus achieving the limiting and force transmission.

[0053] Elastic element I5: such as a compression spring, used to buffer the movement of plug II4 on the winding shaft 6. Elastic element I5 is sleeved on the winding shaft 6, and is located between plug II4 and elastic element I5. One end of elastic element I5 abuts against plug II4, and the other end abuts against plug I7 (the other end of elastic element I5 extends towards plug I7).

[0054] The relevant operational procedures are as follows:

[0055] 1. When installing and locking the paper tube, align the large end of the paper tube with the bobbin core assembly 1, and push the paper tube in from bobbin III 13 to bobbin I 11, fitting it onto the outside of the bobbin core assembly 1 until the paper tube is installed on the bobbin core assembly 1. Furthermore, the elastic elements II 14, III 15, and others are used to further secure the paper tube and prevent deformation.

[0056] 2. When it is necessary to loosen the paper tube, push the lever 21 to control the lever 22 to push the card holder 31 to move towards the plug II 4. The card holder 31 drives the card strip 32 to move towards the plug II 4. The plug II 4 is subjected to the force of the card strip 32 and moves towards the elastic element I 5. The elastic element I 5 is subjected to the force of the plug II 4 and the resistance of the plug I 7, and is compressed and deformed. At this time, the force of the left side of the plug II 4 on the right side of the tube III 13, the force of the left side of the tube III 13 on the right side of the tube II 12, and the force of the left side of the tube II 12 and the right side of the tube I 11 are all reduced / disappeared. That is, the tubes I 11, II 12 and III 13 are loosened. The outer surface of the tube I 11, the outer surface of the tube II 12 and the outer surface of the tube III 13 no longer form a continuous conical surface. That is, the taper of the tube is no longer consistent with the inner surface of the paper tube, so the paper tube cannot be clamped. The paper tube is loosened and can be directly removed.

[0057] When the lever is moved, the bobbin core assembly 1 is in the loosened state, allowing the paper tube to be removed; when the bobbin core assembly 1 is in the locked state, the paper tube is locked. The lever is used to push the tube-locking fork 3, causing it to move on the winding shaft 6. The structure is simple, reliable, and not prone to failure. This paper tube installation mechanism achieves locking and fixing by matching the tapered shape of the bobbin core assembly 1 with the tapered shape of the paper tube when locked. The bobbin core assembly 1 can be made of plastic, which is low-cost; if there is a malfunction, only the corresponding bobbin needs to be replaced.

[0058] Example 2

[0059] Based on Example 1, this example proposes, in order to further tighten the paper tube, the following:

[0060] The right end of the tube I11 is provided with an elastic element II14, the right end of the tube II12 is provided with an elastic element III15, and the right end of the tube III13 is provided with an elastic element IV16. When the tubes I11, II12, and III13 are locked, the elastic elements II14, III15, and IV16 protrude from the outer surface formed between the tubes I11, II12, and III13 to clamp the paper tube and prevent the paper tube from deforming.

[0061] The inner diameter of elastic element II14 is greater than the inner diameter of elastic element III15, which in turn is greater than the inner diameter of elastic element IV16. More specifically, elastic elements II14, III15, and IV16 are all double-hook ring tension springs.

[0062] Regarding the specific installation positions of elastic elements II14, III15, and IV16, the considerations are twofold: firstly, they should not affect the sliding motion between bobbins I11, II12, and III13; secondly, they should be able to secure the paper tube without causing deformation. The installation methods for elastic elements II14, III15, and IV16 can be either fixed or detachable.

[0063] Example 3

[0064] Based on Examples 1-2, this example proposes the following measures to ensure the stability and effectiveness of force propagation during the installation, loosening, or locking of the paper tube:

[0065] The projected area of ​​the pull tab 22 on the card holder 31 (the contact area between the pull tab 22 and the card holder 31) is greater than or equal to the surface area of ​​the left side of the card holder 31;

[0066] The projected area of ​​the retaining strip 32 on the plug II 4 (the contact area between the retaining strip 32 and the plug II 4) is greater than or equal to the surface area of ​​the left side of the plug II 4;

[0067] The projected area of ​​elastic element I5 on plug II4 (the contact area between elastic element I5 and plug II4) is greater than or equal to the surface area of ​​the right side of plug II4;

[0068] The projected area of ​​elastic element I5 on plug I7 (the contact area between elastic element I5 and plug I7) is greater than or equal to the surface area of ​​the left side of plug I7.

[0069] The above-mentioned configuration effectively improves the stability of the contact between the pull tab 22 and the card holder 31, the card strip 32 and the plug II 4, the elastic element I 5 and the plug II 4, and the elastic element I 5 and the plug I 7, facilitating the transmission of force and thus improving the effectiveness of their mutual actions.

[0070] Example 4

[0071] Based on embodiments 1-3, this embodiment provides: a winding device for winding a coil, including a winding shaft 6 and the aforementioned paper tube mounting mechanism, wherein the paper tube mounting mechanism is sleeved on the winding shaft 6.

[0072] Example 5

[0073] Based on embodiments 1-4, this embodiment provides: a winding machine, including a spindle box 8, a winding shaft 6 and the aforementioned paper tube mounting mechanism, one end of the winding shaft 6 extends into the spindle box 8, and the other end is fitted with the paper tube mounting mechanism.

Claims

1. A paper tube mounting mechanism for a bobbin, which is fitted on a winding shaft (6) in a bobbin winder, characterized in that: The winding shaft (6) is provided with a plug I (7) at its end; the paper tube installation mechanism includes a tube core assembly (1), an adjustment assembly (2), a tube clamping fork (3), a plug II (4), and an elastic element I (5), wherein, The bobbin core assembly (1) includes bobbin I (11), bobbin II (12) and bobbin III (13) sequentially sleeved on the winding shaft (6). The right end face of bobbin I (11) is fitted with the left end face of bobbin II (12), and the right end face of bobbin II (12) is fitted with the left end face of bobbin III (13). The outer diameter of the left end of bobbin I (11) is larger than the inner diameter of the paper tube. When locked, the outer surface taper formed between bobbin I (11), bobbin II (12) and bobbin III (13) is equal to the inner surface taper of the paper tube. The adjustment assembly (2) includes a lever (21) and a lever (22). One end of the lever (22) is connected to the lever (21), and the other end is sleeved on the winding shaft (6). The lever (22) is located on the left side of the tube clamp fork (3). The tube clamp fork (3) includes a clamp seat (31) and clamp strips (32) provided on the clamp seat (31). The clamp seat (31) is sleeved on the winding shaft (6) and the clamp seat (31) is located between the pull plate (22) and the tube I (11). There are at least two clamp strips (32) evenly distributed on the clamp seat (31). The plug II (4) is located on the right side of the tube III (13). The right end face of the tube III (13) and the left end face of the plug II (4) are fitted together. The retaining strip (32) passes through the inner side of the tube I (11), tube II (12) and tube III (13) in sequence, extends towards the plug II (4), and the retaining strip (32) abuts against the plug II (4). The elastic element I (5) is sleeved on the winding shaft (6), and the elastic element I (5) is located between the plug II (4) and the elastic element I (5). One end of the elastic element I (5) abuts against the plug II (4), and the other end abuts against the plug I (7).

2. A tube mounting mechanism for a bobbin according to claim 1, characterized in that: The right end of the tube I (11) is provided with elastic element II (14), the right end of the tube II (12) is provided with elastic element III (15), and the right end of the tube III (13) is provided with elastic element IV (16). When locked, elastic elements II (14), III (15) and IV (16) all protrude from the outer surface formed between the tube I (11), tube II (12) and tube III (13).

3. A tube mounting mechanism for a bobbin according to claim 2, characterized in that: The inner diameter of elastic element II (14) is greater than the inner diameter of elastic element III (15) and the inner diameter of elastic element IV (16).

4. A tube mounting mechanism for a bobbin according to claim 3, characterized in that: The elastic element II (14), elastic element III (15) and elastic element IV (16) are double-hook ring tension springs.

5. The paper tube mounting mechanism for a bobbin according to claim 2, characterized by: The contact surfaces of the tube I (11) and tube II (12) are inclined, the contact surfaces of the tube II (12) and tube III (13) are inclined, and the contact surfaces of the tube III (13) and plug II (4) are inclined.

6. The paper tube mounting mechanism for bobbing according to claim 1, characterized by: The elastic element I (5) is a compression spring.

7. The paper tube mounting mechanism for bobbing according to claim 1, characterized by: The projected area of ​​the pull tab (22) on the card holder (31) is smaller than the surface area on the left side of the card holder (31); The projected area of ​​the card strip (32) on the plug II (4) is smaller than the surface area on the left side of the plug II (4); The projected area of ​​the elastic element I (5) on the plug II (4) is smaller than the surface area on the right side of the plug II (4); The projected area of ​​the elastic element I (5) on the plug I (7) is smaller than the surface area on the left side of the plug I (7).

8. A winding device for a bobbin, characterized in that: It includes a winding shaft (6) and a paper tube mounting mechanism as described in any one of claims 1-7, the paper tube mounting mechanism being sleeved on the winding shaft (6).

9. A winding machine characterized by: It includes a spindle box (8), a winding shaft (6), and a paper tube mounting mechanism as described in any one of claims 1-7, wherein one end of the winding shaft (6) extends into the spindle box (8), and the paper tube mounting mechanism is sleeved on the other end.

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