Spiral cloth pushing mechanism and cloth laying machine

Abstract

The utility model provides a kind of spiral cloth pushing mechanism and cloth laying machine, spiral cloth pushing mechanism includes mounting bracket and rotates and is located in the mounting bracket roll bar body;The outer surface of roll bar body is respectively provided with first spiral protruding portion and second spiral protruding portion from middle to both ends, and the spiral direction of first spiral protruding portion and second spiral protruding portion is opposite;The inner side wall surface of first spiral protruding portion and second spiral protruding portion is all first spiral inclined plane, and the outer side wall surface of first spiral protruding portion and second spiral protruding portion is all second spiral inclined plane, and the upper end of first spiral protruding portion and second spiral protruding portion is formed with arc transition surface between first spiral inclined plane and second spiral inclined plane.The utility model has the advantages that: not only can better realize cloth by middle position to both sides and push flat, prevent cloth from curling, wrinkle condition, to ensure cloth laying effect;And can avoid damaging cloth, also can reduce the resistance of roll bar body when conveying cloth forward.

Description

[Technical Field]

[0001] This utility model relates to the field of fabric spreading machine technology, and in particular to a spiral fabric spreading mechanism and a fabric spreading machine. [Background Technology]

[0002] Fabric spreading machines are widely used equipment in the modern garment industry. When in use, a fabric spreading machine pulls a roll of fabric to an appropriate length and lays it flat, then cuts it into standard fabrics of various sizes according to usage requirements. During the fabric spreading process, the machine often encounters issues such as fabric curling and wrinkling, which affects the spreading effect. To solve these problems, fabric spreading machines are usually equipped with edge-trimming mechanisms, such as the edge-trimming mechanism for a fabric spreading machine disclosed in Chinese Utility Model Patent Application No. CN202220692864.4, which uses an edge-trimming strip with edge-trimming strips to trim the fabric edges. However, the above-mentioned existing edge-trimming mechanisms have the following drawbacks in practical use: they easily damage the fabric and increase the resistance during fabric conveying. In view of the above problems, the inventors of this case conducted in-depth research on this issue, resulting in this application. [Utility Model Content]

[0003] The technical problem to be solved by this utility model is to provide a spiral fabric-pulling mechanism and a fabric-laying machine, which solves the problem that existing edge-pulling mechanisms are prone to damaging the fabric and increasing the resistance during fabric conveying.

[0004] This utility model is implemented as follows:

[0005] In a first aspect, a spiral fabric-dispensing mechanism includes a mounting frame and a roller rod body rotatably mounted on the mounting frame; the outer surface of the roller rod body is provided with a first spiral protrusion and a second spiral protrusion from the middle to both ends, the spiral directions of the first spiral protrusion and the second spiral protrusion being opposite.

[0006] The inner wall surfaces of the first and second spiral protrusions are both first spiral inclined surfaces, and the outer wall surfaces of the first and second spiral protrusions are both second spiral inclined surfaces. Furthermore, an arc-shaped transition surface is formed between the first and second spiral protrusions at their upper ends.

[0007] Furthermore, both the first and second spiral protrusions are integrally formed with the roller rod body, which is made of metal.

[0008] Both ends of the roller rod body are provided with mounting portions, and the outer surface of any one mounting portion is provided with a first transmission groove.

[0009] Furthermore, it also includes driver components;

[0010] The drive assembly includes a drive motor, a drive wheel connected to the output end of the drive motor, and a transmission belt. The outer surface of the drive wheel is provided with a second transmission groove, and the transmission belt is sleeved between the first transmission groove and the second transmission groove.

[0011] Furthermore, the helical pitch of both the first helical protrusion and the second helical protrusion is 23-25 ​​mm;

[0012] The vertical distance between the upper end points of the first and second helical protrusions and the outer surface of the roller rod body is 3.5-4.0 mm.

[0013] The angle between the first helical inclined surface and the roller rod body is 68°-72°, and the angle between the second helical inclined surface and the roller rod body is 148°-152°; the distance between the lower ends of the first and second helical inclined surfaces is 5.27-5.67mm; the arc transition surface is a rounded surface with a radius between 0.1-0.3mm.

[0014] Secondly, a fabric spreading machine employs the aforementioned spiral fabric spreading mechanism.

[0015] Thirdly, a spiral fabric feeding mechanism includes a mounting frame, a first roller rod rotatably mounted on the mounting frame, and a second roller rod rotatably mounted on the mounting frame, wherein the axis of the first roller rod rotatably mounted on the mounting frame coincides with the axis of the second roller rod rotatably mounted on the mounting frame; a first spiral protrusion is formed on the outer surface of the first roller rod rotatably mounted on the mounting frame, and a second spiral protrusion is formed on the outer surface of the second roller rod rotatably mounted on the mounting frame, wherein the spiral directions of the first spiral protrusion and the second spiral protrusion are opposite.

[0016] The inner wall surfaces of the first and second spiral protrusions are both first spiral inclined surfaces, and the outer wall surfaces of the first and second spiral protrusions are both second spiral inclined surfaces. Furthermore, an arc-shaped transition surface is formed between the first and second spiral protrusions at their upper ends.

[0017] Furthermore, the first spiral protrusion is integrally formed with the first roller rod, and the second spiral protrusion is integrally formed with the second roller rod. Both the first roller rod and the second roller rod are made of metal.

[0018] Both ends of the first roller rod segment and the second roller rod segment have mounting portions, and the outer surface of any mounting portion on the first roller rod segment and the second roller rod segment is provided with a first transmission groove.

[0019] Furthermore, it also includes a drive assembly, with both the first and second roller rod sections equipped with a drive assembly;

[0020] The drive assembly includes a drive motor, a drive wheel connected to the output end of the drive motor, and a transmission belt. The outer surface of the drive wheel is provided with a second transmission groove, and the transmission belt is sleeved between the first transmission groove and the second transmission groove.

[0021] Furthermore, the helical pitch of both the first helical protrusion and the second helical protrusion is 23-25 ​​mm;

[0022] The vertical distance between the upper end point of the first spiral protrusion and the outer surface of the first roller rod body is 3.5-4.0 mm, and the vertical distance between the upper end point of the second spiral protrusion and the outer surface of the second roller rod body is 3.5-4.0 mm.

[0023] The angle between the first helical inclined surface and the first and second roller rod segments is 68°-72°, and the angle between the second helical inclined surface and the first and second roller rod segments is 148°-152°; the distance between the lower endpoints of the first and second helical inclined surfaces is 5.27-5.67 mm; the arc transition surface is a rounded surface with a radius between 0.1-0.3 mm.

[0024] Fourthly, a fabric spreading machine, wherein the fabric spreading machine employs the aforementioned spiral fabric spreading mechanism.

[0025] By adopting the technical solution of this utility model, at least the following beneficial effects are achieved: By designing the inner wall surfaces of the first spiral protrusion and the second spiral protrusion to be both first spiral inclined surfaces, and the outer wall surfaces of the first spiral protrusion and the second spiral protrusion to be both second spiral inclined surfaces, and forming an arc-shaped transition surface between the first spiral inclined surface and the second spiral inclined surface, it is possible to better flatten the fabric from the middle to both sides during actual use, preventing the fabric from curling or wrinkling, thereby ensuring the fabric laying effect; it can also avoid damaging the fabric, and effectively reduce the resistance of the roller body when conveying the fabric forward, which helps to further improve the fabric laying effect. [Attached Image Description]

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 This is a structural diagram of the spiral fabric-pulling mechanism in Embodiment 1 of this utility model;

[0028] Figure 2 This is a structural diagram of the roller rod body in Embodiment 1 of this utility model;

[0029] Figure 3 This is a structural diagram of the spiral fabric-pulling mechanism in Embodiment 2 of this utility model;

[0030] Figure 4 This is a structural diagram of the first roller rod in Embodiment 2 of this utility model;

[0031] Figure 5 This is a structural diagram of the second roller rod in Embodiment 2 of this utility model;

[0032] Figure 6 This is a cross-sectional view of the first roller rod in Embodiment 2 of this utility model;

[0033] Figure 7 This is a cross-sectional view of the second roller rod in Embodiment 2 of this utility model;

[0034] Figure 8 This is a cross-sectional view of the first spiral protrusion in this utility model (i.e.) Figure 6 (Enlarged view of part A in the middle);

[0035] Figure 9 This is a cross-sectional view of the second spiral protrusion in this utility model (i.e.) Figure 7 (Enlarged view of part B in the middle);

[0036] Figure 10 This is a structural diagram of the driving component in this utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] Spiral cloth-dispensing mechanism 100;

[0039] Mounting bracket 1;

[0040] Roller rod body 2;

[0041] First spiral protrusion 31, second spiral protrusion 32;

[0042] First spiral inclined surface 41, second spiral inclined surface 42, arc-shaped transition surface 43;

[0043] Mounting part 5, first transmission groove 51;

[0044] Drive assembly 6, drive motor 61, drive wheel 62, second transmission groove 621, transmission belt 63;

[0045] The first roller lever is split into parts 71 and the second roller lever is split into parts 72.

Detailed Implementation Methods

[0046] To better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0048] Example 1

[0049] Please see Figure 1 , Figure 2 , Figures 8 to 10 As shown, this utility model discloses a spiral fabric-feeding mechanism 100. The spiral fabric-feeding mechanism 100 includes a mounting frame 1 and a roller rod body 2 rotatably mounted on the mounting frame 1. The outer surface of the roller rod body 2 is provided with a first spiral protrusion 31 and a second spiral protrusion 32 from the middle to both ends, respectively. The spiral directions of the first spiral protrusion 31 and the second spiral protrusion 32 are opposite. In specific implementation, the first spiral protrusion 31 and the second spiral protrusion 32 can be provided from the middle position of the outer surface of the roller rod body 2 to both ends. In this way, when the roller rod body 2 rotates, it can not only convey the fabric forward, but also use the first spiral protrusion 31 and the second spiral protrusion 32 to push the fabric from the middle position to both sides, thereby flattening the rolled edge of the fabric outward, thus ensuring the flatness of the fabric during laying and improving the laying effect.

[0050] The inner wall surfaces of the first spiral protrusion 31 and the second spiral protrusion 32 are both first spiral inclined surfaces 41, and the outer wall surfaces of the first spiral protrusion 31 and the second spiral protrusion 32 are both second spiral inclined surfaces 42. Furthermore, the upper ends of the first spiral protrusion 31 and the second spiral protrusion 32 each have an arc-shaped transition surface 43 formed between the first spiral inclined surface 41 and the second spiral inclined surface 42 to avoid damaging the fabric and reduce feeding resistance. It should be noted that in this invention, the inner wall surface of the first spiral protrusion 31 and the second spiral protrusion 32 specifically refers to the side facing the outer surface of the roller rod body 2, and the outer wall surface of the first spiral protrusion 31 and the second spiral protrusion 32 specifically refers to the side facing away from the first spiral inclined surface 41.

[0051] This invention designs the inner walls of the first spiral protrusion 31 and the second spiral protrusion 32 to be first spiral inclined surfaces 41, and the outer walls of the first spiral protrusion 31 and the second spiral protrusion 32 to be second spiral inclined surfaces 42. Furthermore, an arc-shaped transition surface 43 is formed between the first spiral inclined surface 41 and the second spiral inclined surface 42. This design allows for better flattening of the fabric from the center to both sides during use, preventing curling and wrinkles, thus ensuring a better fabric laying effect. It also avoids damaging the fabric and effectively reduces the resistance of the roller body 2 when conveying the fabric forward, further improving the fabric laying effect.

[0052] In one embodiment of this utility model, the first helical protrusion 31 and the second helical protrusion 32 are both integrally formed with the roller rod body 2. As a specific embodiment of this utility model, the roller rod body 2 is made of metal, specifically iron or steel, and can be machined or cast. By using a metal roller rod body 2, static electricity between the roller rod body 2 and the fabric can be eliminated. Of course, the above is only one specific embodiment of this utility model, but this utility model is not limited to this. In specific implementations, roller rod bodies 2 made of other materials, such as plastic, can also be used.

[0053] Both ends of the roller rod body 2 are provided with mounting portions 5. The outer surface of any mounting portion 5 is provided with a first transmission groove 51. In the specific implementation of this utility model, the mounting portion 5 is a cylindrical structure and the outer diameter of the mounting portion 5 is larger than the outer diameter of the roller rod body 2. During assembly, the mounting portion 5 and the mounting bracket 1 need to be rotated together.

[0054] In Embodiment 1 of this utility model, please refer to the following: Figure 10 As shown, the spiral fabric-pulling mechanism 100 also includes a drive assembly 6;

[0055] The drive assembly 6 includes a drive motor 61, a drive wheel 62 connected to the output end of the drive motor 61, and a transmission belt 63. The outer surface of the drive wheel 62 is provided with a second transmission groove 621, and the transmission belt sleeve 63 is disposed between the first transmission groove 51 and the second transmission groove 621. During operation, the drive motor 61 drives the drive wheel 62 to rotate, and the drive wheel 62 drives the transmission belt 63 to perform transmission. During the transmission process, the transmission belt 63 drives the roller rod body 2 to rotate.

[0056] In Embodiment 1 of this utility model, please refer to the following: Figure 8 and Figure 9As shown, in order to achieve better fabric spreading and laying effects, the spiral pitch L1 of the first spiral protrusion 31 and the second spiral protrusion 32 is 23-25mm. Preferably, the spiral pitch L1 of the first spiral protrusion 31 and the second spiral protrusion 32 is 24mm.

[0057] The vertical distance D between the upper end points of the first helical protrusion 31 and the second helical protrusion 32 and the outer surface of the roller rod body 2 is 3.5-4.0 mm. Preferably, the vertical distance D between the upper end points of the first helical protrusion 31 and the second helical protrusion 32 and the outer surface of the roller rod body 2 is 3.75 mm.

[0058] The included angle α between the first helical inclined surface 41 and the roller rod body 2 is 68°-72°, and the included angle β between the second helical inclined surface 42 and the roller rod body 2 is 148°-152°. Preferably, the included angle α between the first helical inclined surface 41 and the roller rod body 2 is 70°, and the included angle β between the second helical inclined surface 42 and the roller rod body 2 is 150°. The distance L2 between the lower endpoints of the first helical inclined surface 41 and the second helical inclined surface 42 is 5.27-5.67 mm. Preferably, the distance L2 between the lower endpoints of the first helical inclined surface 41 and the second helical inclined surface 42 is 5.47 mm. The arc-shaped transition surface 43 is a rounded surface with a radius R between 0.1-0.3 mm. Preferably, the arc-shaped transition surface 43 is a rounded surface with a radius R equal to 0.2 mm.

[0059] Example 2

[0060] Please see Figure 1 , Figure 2 , Figures 8 to 10 As shown, this utility model discloses a fabric spreading machine, which includes a spiral fabric spreading mechanism 100. That is, the fabric spreading machine is equipped with a spiral fabric spreading mechanism 100. The specific structure and the technical effects that the spiral fabric spreading mechanism 100 can achieve are exactly the same as those in Embodiment 1. For details, please refer to the detailed description of Embodiment 1, which will not be repeated here.

[0061] Example 3

[0062] Please see Figures 3 to 10As shown, this utility model discloses a spiral fabric-dispensing mechanism 100, which includes a mounting frame 1, a first roller rod 71 rotatably mounted on the mounting frame 1, and a second roller rod 72 rotatably mounted on the mounting frame 1. The axis of the first roller rod 71 and the second roller rod 72 coincide. A first spiral protrusion 31 is formed on the outer surface of the first roller rod 71, and a second spiral protrusion 32 is formed on the outer surface of the second roller rod 72. The spiral directions of the first spiral protrusion 31 and the second spiral protrusion 32 are opposite. In a specific implementation of this invention, the first roller rod 71 and the second roller rod 72 are identical in size except that the spiral directions of the first spiral protrusion 31 and the second spiral protrusion 32 are opposite. Simultaneously, during operation, the first roller rod 71 and the second roller rod 72 need to rotate synchronously. This allows the fabric to be conveyed forward and the fabric to be moved from the center to both sides using the first spiral protrusion 31 and the second spiral protrusion 32, thus flattening the rolled edges of the fabric outwards. This ensures the flatness of the fabric during laying and improves the laying effect.

[0063] The inner wall surfaces of the first spiral protrusion 31 and the second spiral protrusion 32 are both first spiral inclined surfaces 41, and the outer wall surfaces of the first spiral protrusion 31 and the second spiral protrusion 32 are both second spiral inclined surfaces 42. Furthermore, the upper ends of the first spiral protrusion 31 and the second spiral protrusion 32 each have an arc-shaped transition surface 43 formed between the first spiral inclined surface 41 and the second spiral inclined surface 42 to avoid damaging the fabric and reduce feeding resistance. It should be noted that in this invention, the inner wall surface of the first spiral protrusion 31 and the second spiral protrusion 32 specifically refers to the side facing the outer surface of the first roller rod segment 71 or the second roller rod segment 72, and the outer wall surface of the first spiral protrusion 31 and the second spiral protrusion 32 specifically refers to the side facing away from the first spiral inclined surface 41.

[0064] This invention designs the inner walls of the first spiral protrusion 31 and the second spiral protrusion 32 to be both first spiral inclined surfaces 41, and the outer walls of the first spiral protrusion 31 and the second spiral protrusion 32 to be both second spiral inclined surfaces 42. Furthermore, an arc-shaped transition surface 43 is formed between the first spiral inclined surface 41 and the second spiral inclined surface 42. This design allows for better flattening of the fabric from the center to both sides during use, preventing curling and wrinkles, thus ensuring a better fabric laying effect. It also avoids damaging the fabric and effectively reduces the resistance of the first roller rod 71 and the second roller rod 72 when conveying the fabric forward, further improving the fabric laying effect.

[0065] In a third embodiment of this utility model, the first spiral protrusion 31 is integrally formed with the first roller rod body 71, and the second spiral protrusion 32 is integrally formed with the second roller rod body 72. As a specific implementation of this utility model, both the first roller rod body 71 and the second roller rod body 72 are made of metal, specifically iron or steel, through turning or casting. By using metal for the first roller rod body 71 and the second roller rod body 72, static electricity between them and the fabric can be eliminated. Of course, the above is only one specific embodiment of this utility model, but it is not limited to this. In specific implementations, other materials such as plastic can also be used for the first roller rod body 71 and the second roller rod body 72.

[0066] Both ends of the first roller rod segment 71 and the second roller rod segment 72 are provided with mounting portions 5. The outer surface of any mounting portion 5 on the first roller rod segment 71 and the second roller rod segment 72 is provided with a first transmission groove 51. In specific implementation of this utility model, the mounting portion 5 is a cylindrical structure, and the outer diameter of the mounting portion 5 is larger than the outer diameter of the first roller rod segment 71 or the second roller rod segment 72. During assembly, the mounting portion 5 needs to be rotated and assembled together with the mounting frame 1.

[0067] In Embodiment 3 of this utility model, please refer to the following: Figure 10 As shown, the spiral fabric-pulling mechanism 100 also includes a drive assembly, and the first roller rod split 71 and the second roller rod split 72 are each equipped with a drive assembly 6;

[0068] The drive assembly 6 includes a drive motor 61, a drive wheel 62 connected to the output end of the drive motor 61, and a transmission belt 63. The outer surface of the drive wheel 62 is provided with a second transmission groove 621, and the transmission belt sleeve 63 is disposed between the first transmission groove 51 and the second transmission groove 621. During operation, the drive motor 61 drives the drive wheel 62 to rotate, and the drive wheel 62 drives the transmission belt 63 to perform transmission. During the transmission process, the transmission belt 63 drives the roller rod body 2 to rotate.

[0069] In Embodiment 3 of this utility model, please refer to the following: Figure 8 and Figure 9 As shown, in order to achieve better fabric spreading and laying effects, the spiral pitch L1 of the first spiral protrusion 31 and the second spiral protrusion 32 is 23-25mm. Preferably, the spiral pitch L1 of the first spiral protrusion 31 and the second spiral protrusion 32 is 24mm.

[0070] The vertical distance D between the upper end point of the first spiral protrusion 31 and the outer surface of the first roller rod body 71 is 3.5-4.0 mm, and the vertical distance D between the upper end point of the second spiral protrusion 32 and the outer surface of the second roller rod body 72 is 3.5-4.0 mm. Preferably, the vertical distance D between the upper end point of the first spiral protrusion 31 and the outer surface of the first roller rod body 71 is 3.75 mm, and the vertical distance D between the upper end point of the second spiral protrusion 32 and the outer surface of the second roller rod body 72 is 3.75 mm.

[0071] The included angle α formed between the first helical inclined surface 41 and the first roller rod segment 71 and the second roller rod segment 72 is 68°-72°, and the included angle β formed between the second helical inclined surface 42 and the first roller rod segment 71 and the second roller rod segment 72 is 148°-152°. Preferably, the included angle α formed between the first helical inclined surface 41 and the first roller rod segment 71 and the second roller rod segment 72 is 70°, and the included angle β formed between the second helical inclined surface 42 and the first roller rod segment 71 and the second roller rod segment 72 is 148°-152°. The included angle β formed between the two spiral rod segments 72 is 150°; the distance L2 between the lower ends of the first spiral inclined surface 41 and the second spiral inclined surface 42 is 5.27-5.67 mm, preferably, the distance L2 between the lower ends of the first spiral inclined surface 41 and the second spiral inclined surface 42 is 5.47 mm; the arc transition surface 43 is a rounded surface with a radius R between 0.1-0.3 mm, preferably, the arc transition surface 43 is a rounded surface with a radius R equal to 0.2 mm.

[0072] Example 4

[0073] Please see Figures 3 to 10 As shown, this utility model discloses a fabric spreading machine, which includes a spiral fabric spreading mechanism 100. That is, the fabric spreading machine is equipped with a spiral fabric spreading mechanism 100. The specific structure and the technical effects that the spiral fabric spreading mechanism 100 can achieve are exactly the same as those in Embodiment 3. For details, please refer to the detailed description of Embodiment 3, which will not be repeated here.

[0074] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A spiral fabric-pulling mechanism, characterized in that: It includes a mounting bracket and a roller rod body rotatably mounted on the mounting bracket; the outer surface of the roller rod body is provided with a first helical protrusion and a second helical protrusion from the middle to both ends, and the helical directions of the first helical protrusion and the second helical protrusion are opposite; The inner wall surfaces of the first and second spiral protrusions are both first spiral inclined surfaces, and the outer wall surfaces of the first and second spiral protrusions are both second spiral inclined surfaces. Furthermore, an arc-shaped transition surface is formed between the first and second spiral protrusions at their upper ends.

2. The spiral fabric-pulling mechanism as described in claim 1, characterized in that: Both the first and second spiral protrusions are integrally formed with the roller rod body, which is made of metal. Both ends of the roller rod body are provided with mounting portions, and the outer surface of any one mounting portion is provided with a first transmission groove.

3. The spiral fabric-pulling mechanism as described in claim 2, characterized in that: It also includes driver components; The drive assembly includes a drive motor, a drive wheel connected to the output end of the drive motor, and a transmission belt. The outer surface of the drive wheel is provided with a second transmission groove, and the transmission belt is sleeved between the first transmission groove and the second transmission groove.

4. The spiral fabric-pulling mechanism as described in claim 1, characterized in that: The helical pitch of both the first and second helical protrusions is 23-25 ​​mm. The vertical distance between the upper end points of the first and second helical protrusions and the outer surface of the roller rod body is 3.5-4.0 mm. The angle between the first helical inclined surface and the roller rod body is 68°-72°, and the angle between the second helical inclined surface and the roller rod body is 148°-152°; the distance between the lower ends of the first and second helical inclined surfaces is 5.27-5.67mm; the arc transition surface is a rounded surface with a radius between 0.1-0.3mm.

5. A fabric spreading machine, characterized in that: The fabric spreading machine employs a spiral fabric spreading mechanism as described in any one of claims 1-4.

6. A spiral fabric-pulling mechanism, characterized in that: It includes a mounting frame, a first roller rod rotatably mounted on the mounting frame, and a second roller rod rotatably mounted on the mounting frame, wherein the axis of the first roller rod rotatably mounted on the mounting frame coincides with the axis of the second roller rod rotatably mounted on the mounting frame; The outer surface of the first roller rod segment has a first helical protrusion, and the outer surface of the second roller rod segment has a second helical protrusion. The helical directions of the first helical protrusion and the second helical protrusion are opposite. The inner wall surfaces of the first and second spiral protrusions are both first spiral inclined surfaces, and the outer wall surfaces of the first and second spiral protrusions are both second spiral inclined surfaces. Furthermore, an arc-shaped transition surface is formed between the first and second spiral protrusions at their upper ends.

7. A spiral fabric-pulling mechanism as described in claim 6, characterized in that: The first spiral protrusion is integrally formed with the first roller rod, and the second spiral protrusion is integrally formed with the second roller rod. Both the first roller rod and the second roller rod are made of metal. Both ends of the first roller rod segment and the second roller rod segment have mounting portions, and the outer surface of any mounting portion on the first roller rod segment and the second roller rod segment is provided with a first transmission groove.

8. A spiral fabric-pulling mechanism as described in claim 7, characterized in that: It also includes a drive assembly, with both the first roller rod assembly and the second roller rod assembly equipped with a drive assembly; The drive assembly includes a drive motor, a drive wheel connected to the output end of the drive motor, and a transmission belt. The outer surface of the drive wheel is provided with a second transmission groove, and the transmission belt is sleeved between the first transmission groove and the second transmission groove.

9. A spiral fabric-pulling mechanism as described in claim 6, characterized in that: The helical pitch of both the first and second helical protrusions is 23-25 ​​mm. The vertical distance between the upper end point of the first spiral protrusion and the outer surface of the first roller rod body is 3.5-4.0 mm, and the vertical distance between the upper end point of the second spiral protrusion and the outer surface of the second roller rod body is 3.5-4.0 mm. The angle between the first helical inclined surface and the first and second roller rod segments is 68°-72°, and the angle between the second helical inclined surface and the first and second roller rod segments is 148°-152°; the distance between the lower endpoints of the first and second helical inclined surfaces is 5.27-5.67 mm; the arc transition surface is a rounded surface with a radius between 0.1-0.3 mm.

10. A fabric spreading machine, characterized in that: The fabric spreading machine employs a spiral fabric spreading mechanism as described in any one of claims 6-9.

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