Double-roll-shaft sewing device

Abstract

The utility model relates to the technical field of sewing equipment, and particularly discloses a double-roll-shaft sewing device. The sewing machine comprises a driving rod used for sewing and a presser foot rod arranged on the rear side of the driving rod. The double needle heads are used for sewing a sewing material, and the double needle heads are mounted on the driving rod; the double-roll-shaft assembly is mounted on the presser foot rod, and the double-roll-shaft assembly comprises a first roll shaft structure arranged on the left side of the double needles, a second roll shaft structure arranged on the right side of the double needles and a fixed transverse block fixed to the presser foot rod; and the fixed transverse block is used for connecting the first roll shaft structure and the second roll shaft structure. The sewing machine is stable in sewing material guiding, good in core strip wrapping effect and high in sewing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment technology, and in particular to a double roller sewing device. Background Technology

[0002] In modern shoemaking, the sewing of the toe area is a crucial step. To enhance the structural stability and aesthetics of the toe, a core strip is typically wrapped within the fabric to provide additional support and shape retention. However, traditional single-needle sewing methods can only sew on one side, making it prone to the core strip shifting within the fabric, resulting in unsatisfactory sewing quality. Furthermore, the toe requires curved sewing, and the one-sided pressing method makes it difficult to effectively secure the fabric during sewing, especially when the core strip is wrapped. This leads to extremely low fabric stability, causing the fabric to wrinkle and deform easily during sewing, resulting in poor product appearance and quality. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a double-roller sewing device that provides stable fabric guidance, good core-covering strip effect, and high sewing efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A twin-roller sewing device, comprising:

[0006] A sewing machine, including a drive rod for sewing and a presser foot rod disposed on the rear side of the drive rod;

[0007] A double needle for sewing fabric, the double needle being mounted on the drive rod;

[0008] A dual-roller assembly is mounted on the presser foot rod. The dual-roller assembly includes a first roller structure disposed on the left side of the dual needle head, a second roller structure disposed on the right side of the dual needle head, and a fixing cross block fixed on the presser foot rod. The fixing cross block is used to connect the first roller structure and the second roller structure.

[0009] According to some embodiments of the present invention, both the first roller structure and the second roller structure include a roller rod connected to the fixed cross block, a fixing structure, a side connecting plate connected to the roller rod through the fixing structure, and a feeding roller rotatably mounted on the side connecting plate. During sewing, the circumferential surface of the feeding roller is used to press the sewing material and roll to feed it.

[0010] According to some embodiments of the present invention, the central axis of the feeding roller forms an angle of less than 90 degrees with the horizontal plane.

[0011] According to some embodiments of the present invention, the side connecting plate includes a vertical part in the shape of a number 7 and an inclined part that is connected to the vertical part and tilts inward, and the feeding roller is fixed on the inclined part.

[0012] According to some embodiments of the present invention, the bottom of the circumferential surface of the feeding roller is parallel to the horizontal plane.

[0013] According to some embodiments of the present invention, the circumferential surface of the feeding roller is provided with anti-slip texture.

[0014] According to some embodiments of the present invention, the fixing structure includes a limiting block disposed on the roller shaft, a rotating block connected to the side connecting plate, and an elastic structure abutting below the limiting block. The elastic structure is sleeved on the outside of the roller shaft and is used to press the rotating block against the limiting block for limiting.

[0015] According to some embodiments of the present invention, the limiting block is a protrusion disposed on the roller shaft, and the top of the rotating block has a limiting groove that matches the protrusion.

[0016] According to some embodiments of the present invention, the limiting block includes a first limiting part disposed on the roller shaft and a second limiting part disposed on the roller shaft, wherein the first limiting part is disposed below the second limiting part.

[0017] According to some embodiments of the present invention, the first limiting part is disposed on the front side of the roller rod, and the second limiting part is disposed on the outer side of the roller rod.

[0018] This utility model has at least the following beneficial effects:

[0019] The dual-needle design allows for the simultaneous sewing of two threads, improving sewing efficiency compared to single-needle sewing machines. The dual-roller assembly effectively guides and compresses the fabric on both sides of the core strip, reducing fabric shift and wrinkles during sewing, facilitating dual-needle sewing, ensuring stable fabric guidance, and resulting in a superior product appearance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of a double roller assembly and a double needle head structure according to an embodiment of the present invention. Detailed Implementation

[0022] This invention provides the following description with reference to the accompanying drawings to aid in a comprehensive understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered exemplary only. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0023] In the description of this utility model, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0025] An embodiment of this utility model provides a double-roller sewing device, such as... Figure 1-2 As shown, including

[0026] Sewing machine 101 includes a drive rod 102 for sewing and a presser foot rod 103 disposed on the rear side of the drive rod 102;

[0027] The double needle 104 is used for sewing fabric 301, and the double needle 104 is mounted on the drive rod 102.

[0028] The dual roller assembly 200 is mounted on the presser foot rod 103. The dual roller assembly 200 includes a first roller structure 201 disposed on the left side of the dual needle head 104, a second roller structure 202 disposed on the right side of the dual needle head 104, and a fixing cross block 204 fixed on the presser foot rod 103. The fixing cross block 204 is used to connect the first roller structure 201 and the second roller structure 202.

[0029] The double needle head 104 is mounted on the drive rod 102. The drive rod 102 of the sewing machine 101 drives the double needle head 104 to perform up and down sewing operations, enabling the simultaneous sewing of two threads. This allows the fabric 301 to be wrapped around the core strip 302 on both sides at once. The double roller shaft assembly 200 is mounted on the presser foot rod 103 and includes a first roller shaft structure 201, a second roller shaft structure 202, and a fixing cross block 204. The first roller shaft structure 201 and the second roller shaft structure 202 are located on the left and right sides of the double needle head 104, respectively, to fix the fabric 301 on both sides of the core strip 302. The fixing cross block 204 connects the two roller shaft structures to ensure the stability of the fabric 301 during double needle sewing and improve product quality.

[0030] In some embodiments, such as Figure 1-2 As shown, both the first roller shaft structure 201 and the second roller shaft structure 202 include a roller shaft rod 205 connected to the fixed cross block 204, a fixed structure 203, a side connecting plate 206 connected to the roller shaft rod 205 through the fixed structure 203, and a feeding roller 207 rotatably mounted on the side connecting plate 206. During sewing, the circumferential surface of the feeding roller 207 is used to press the sewing material 301 and roll to feed it.

[0031] The top end of the roller shaft 205 is connected to the fixed cross block 204 by means of threaded fixing or welding, which improves the structural rigidity. The side connecting plate 206 is connected to the roller shaft 205 by a fixing structure 203, which can be a screw, a rotatable structure, or other connecting structure. The feeding roller 207 is installed on the side connecting plate 206. During the sewing process, the circumferential surface of the feeding roller 207 rolls in contact with the sewing fabric 301, realizing the functions of simultaneous pressing and feeding on both sides, effectively preventing the sewing fabric 301 from shifting or wrinkling during the sewing process, and ensuring the flatness of the sewing fabric 301. Furthermore, the side connecting plate 206 can be rotated or adjusted up and down on the roller shaft 205 through the fixing structure 203, which makes it convenient to adjust the height of the feeding roller 207 or not to contact the sewing fabric 301, adapting to sewing fabrics of greater thickness and different sewing methods.

[0032] Furthermore, such as Figure 1 As shown, the central axis of the feeding roller 207 forms an angle of less than 90 degrees with the horizontal plane.

[0033] The included angle allows the feeding roller 207 to be placed at an angle, enabling the feeding roller 207 to apply pressure at a better angle when it comes into contact with the sewing fabric 301, reducing the resistance of the sewing fabric 301 during the feeding process, thereby improving the feeding efficiency.

[0034] Furthermore, such as Figure 2As shown, the side connecting plate 206 includes a vertical part 208 in the shape of a number 7 and an inclined part 209 that is connected to the vertical part 208 and tilts inward. The feeding roller 207 is fixed on the inclined part 209.

[0035] The vertical part 208 in the shape of the number 7 allows the feed roller 207 to extend forward to both sides of the double needle head 104, which facilitates the fixing of the sewing material 301 during sewing and prevents it from going off-center.

[0036] In some embodiments, such as Figure 1 As shown, the bottom of the circumferential surface of the feeding roller 207 is parallel to the horizontal plane.

[0037] When the feed roller 207 is parallel to the horizontal plane, the pressure is evenly distributed when it comes into contact with the sewing material 301, which increases the contact area between the feed roller 207 and the sewing material 301, effectively preventing the sewing material 301 from wrinkling or shifting, and improving sewing stability.

[0038] In some embodiments, such as Figure 1-2 As shown, the feeding roller 207 has anti-slip texture on its circumference.

[0039] The anti-slip texture increases the friction between the feed roller 207 and the sewing material 301, ensuring that the sewing material 301 moves smoothly during the sewing process and does not slip.

[0040] In some embodiments, such as Figure 2 As shown, the fixed structure 203 includes a limiting block 210 disposed on the roller rod 205, a rotating block 211 connected to the side connecting plate 206, and an elastic structure 212 abutting below the limiting block 210. The elastic structure 212 is sleeved on the outside of the roller rod 205 and is used to press the rotating block 211 against the limiting block 210 for limiting.

[0041] The elastic structure 212 is sleeved on the outside of the roller 205. Through its elastic properties, it can continuously apply pressure to the rotating block 211, ensuring that the rotating block 211 is in close contact with the limiting block 210. The limiting block 210 can be a structure with protrusions or grooves that can restrict the position of the rotating block 211. By pressing down on the rotating block 211, the elastic structure 212, such as a spring, is compressed, which allows the rotating block 211 to quickly disengage without the need for complicated tools or cumbersome adjustment steps.

[0042] Furthermore, such as Figure 1-2 As shown, the limiting block 210 is a protrusion provided on the roller rod 205, and the top of the rotating block 211 has a limiting groove that matches the protrusion.

[0043] The structure of the protrusion simplifies the structure of the limiting block 210. Combined with the limiting groove and the elastic structure 212, the limiting groove on the rotating block 211 can be firmly locked into the protrusion to prevent the rotating block 211 from rotating during sewing.

[0044] Furthermore, such as Figure 2 As shown, the limiting block 210 includes a first limiting part 215 disposed on the roller rod 205 and a second limiting part 216 disposed on the roller rod 205, with the first limiting part 215 disposed below the second limiting part 216.

[0045] The first limiting part 215 and the second limiting part 216 allow the rotating block 211 to adjust its height or rotation angle to adapt to more sewing scenarios. If the first limiting part 215 and the second limiting part 216 are positioned vertically, the height of the rotating block 211 can be adjusted, thereby adjusting the height of the feeding roller 207; if they are misaligned, the rotation angle of the rotating block 211 can be adjusted. When the rotating block 211 is limited by the first limiting part 215, the elastic structure 212 can be compressed downwards by pressing down on the rotating block 211, causing the rotating block 211 to rotate to the side of the second limiting part 216 and be limited by it.

[0046] Furthermore, such as Figure 2 As shown, the first limiting part 215 is provided on the front side of the roller rod 205, and the second limiting part 216 is provided on the outside of the roller rod 205.

[0047] During sewing, the rotating block 211 is fixed by the first limiting part 215. In other situations where a single-sided feeding roller 207 is needed or the sewing material 301 needs to be adjusted, the elastic structure 212 can be compressed downwards to rotate the rotating block 211 onto the second limiting part 216 for fixation, thus adjusting the sewing requirements while preventing the structure from loosening.

[0048] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, those skilled in the art should understand that the foregoing description of various embodiments of the present invention is for illustrative purposes only, and not intended to limit the present invention as defined by the appended claims and their equivalents.

Claims

1. A double-roller sewing device, characterized in that, include: A sewing machine (101) includes a drive rod (102) for sewing and a presser foot rod (103) disposed on the rear side of the drive rod (102); A double needle (104) for sewing fabric (301) is mounted on the drive rod (102); A dual roller assembly (200) is mounted on the presser foot rod (103). The dual roller assembly (200) includes a first roller structure (201) disposed on the left side of the dual needle head (104), a second roller structure (202) disposed on the right side of the dual needle head (104), and a fixing cross block (204) fixed on the presser foot rod (103). The fixing cross block (204) is used to connect the first roller structure (201) and the second roller structure (202).

2. The double-roller sewing device according to claim 1, characterized in that: Both the first roller structure (201) and the second roller structure (202) include a roller rod (205) connected to the fixed cross block (204), a fixing structure (203), a side connecting plate (206) connected to the roller rod (205) through the fixing structure (203), and a feeding roller (207) rotatably mounted on the side connecting plate (206). During sewing, the circumferential surface of the feeding roller (207) is used to press the sewing material (301) and roll to feed the material.

3. The double-roller sewing device according to claim 2, characterized in that: The central axis of the feeding roller (207) forms an angle of less than 90 degrees with the horizontal plane.

4. A double-roller sewing device according to claim 2, characterized in that: The side connecting plate (206) includes a vertical part (208) in the shape of a number 7 and an inclined part (209) that is connected to the vertical part (208) and tilted inward. The feeding roller (207) is fixed on the inclined part (209).

5. A double-roller sewing device according to any one of claims 2-4, characterized in that: The bottom of the circumferential surface of the feeding roller (207) is parallel to the horizontal plane.

6. A double-roller sewing device according to any one of claims 2-4, characterized in that: The feeding roller (207) has anti-slip texture on its circumference.

7. A double-roller sewing device according to any one of claims 2-4, characterized in that: The fixing structure (203) includes a limiting block (210) disposed on the roller shaft (205), a rotating block (211) connected to the side connecting plate (206), and an elastic structure (212) abutting below the limiting block (210). The elastic structure (212) is sleeved on the outside of the roller shaft (205) and is used to press the rotating block (211) against the limiting block (210) for limiting.

8. A double-roller sewing device according to claim 7, characterized in that: The limiting block (210) is a protrusion provided on the roller rod (205), and the top of the rotating block (211) has a limiting groove that matches the protrusion.

9. A double-roller sewing device according to claim 7, characterized in that: The limiting block (210) includes a first limiting part (215) disposed on the roller rod (205) and a second limiting part (216) disposed on the roller rod (205), wherein the first limiting part (215) is disposed below the second limiting part (216).

10. A double-roller sewing device according to claim 9, characterized in that: The first limiting part (215) is disposed on the front side of the roller rod (205), and the second limiting part (216) is disposed on the outside of the roller rod (205).

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