A tucker for a synchronous sewing machine

Abstract

The utility model relates to a wrinkle extraction device of synchronous sewing machine, including synchronous sewing machine body, fixed seat subassembly, swing connecting rod subassembly, prong component and transmission connecting rod subassembly, swing connecting rod subassembly and transmission connecting rod subassembly between installation long connecting rod, transmission connecting rod subassembly is connected through eccentric cam and the main shaft of synchronous sewing machine body, the claw end of prong component corresponds with the presser foot of synchronous sewing machine body, the utility model discloses through the eccentric cam on the main shaft drive eccentric connecting rod before and after movement, through transmission connecting rod subassembly and swing connecting rod subassembly drive prong component before and after movement, make prong can push out stable even wrinkle, and the wrinkle form is strong in consistency, and the degree of automation of operation is high, and the artificial intervention intensity is greatly reduced, the utility model discloses reliable performance, and the sewing hat felt fold saves time and labour, and the work efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to a pleating device for a synchronous sewing machine, used for pleating military cotton hats and leather hats, belonging to the field of garment tooling technology. Background Technology

[0002] In the garment manufacturing industry, pleating is widely used in various knitted and textile products, such as sportswear, fashion apparel, and underwear, to enhance the aesthetics of products by creating regular or decorative pleats. Traditional pleating devices (or pleating machines) use a mechanical transmission structure to drive components such as claws and presser feet to fold and sew fabrics. However, existing devices are mainly designed for ordinary soft fabrics, and their structure and adjustment functions have significant limitations when dealing with high-hardness materials (such as the felt used in military caps and leather hats). The felt material is hard and thick, and the claws of traditional pleating devices do not have enough clamping force, making it difficult to form pleats. During the sewing process, loose and uneven pleats are prone to occur, requiring frequent manual intervention to correct the pleat effect. Moreover, the daily output of a single machine is low, making it difficult to meet the timeliness and strict process standards of large-scale military production.

[0003] Chinese invention application CN101962880A discloses a pleating device for sewing pleated lace. The pleating device is mounted on a sewing machine and includes a pleating generating device with a convex arc-shaped working surface. The arc-shaped working surface is perpendicular to the direction of fabric movement when the sewing machine is working. The sewing machine needle is close to the arc-shaped working surface. When the sewing machine is working, the needle moves down or up along a portion of the arc-shaped working surface. A conveyor frame is installed on the pleating generating device. The above device is only suitable for sewing pleats on ordinary soft fabrics and has limitations on the width of the fabric to be sewn. It cannot be used to sew felt hats used in military cotton hats or leather hats. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pleating device for a synchronous sewing machine that is reliable in performance, produces uniform pleats, has a high degree of automation, and reduces manual operation.

[0005] The present invention adopts the following technical solution:

[0006] The pleating device of this utility model for a synchronous sewing machine includes a synchronous sewing machine body, a fixed base assembly installed on the front side of the worktable of the synchronous sewing machine body, a swing linkage assembly installed on both sides of the fixed base assembly, a claw assembly connected to the swing linkage assembly, and a transmission linkage assembly installed on the rear side of the machine head of the synchronous sewing machine body; the swing linkage assembly and the transmission linkage assembly are connected by a long connecting rod, the transmission linkage assembly is connected to the main shaft of the synchronous sewing machine body through an eccentric cam, and the claw end of the claw assembly corresponds to the presser foot of the synchronous sewing machine body.

[0007] This utility model's transmission linkage assembly includes an eccentric connecting rod, a right transmission connecting rod, a swing shaft, and a left transmission connecting rod. The upper end of the right transmission connecting rod has a long slot A, and the lower end of the left transmission connecting rod has a long slot B. The swing shaft is fixedly installed between the right and left transmission connecting rods. Two bushings are installed at intervals on the rear side of the sewing machine head, with the two ends of the swing shaft correspondingly fitted into the bushings. The front end of the eccentric connecting rod is fitted with an eccentric cam, and a movable shaft head bolt A is fixedly installed in the long slot A of the right transmission connecting rod. The rear end of the eccentric connecting rod is hinged to the corresponding end of the shaft head bolt A. The swing shaft is parallel to the main shaft, and the eccentric connecting rod is perpendicular to the main shaft.

[0008] The present invention includes a fixed base assembly comprising a square base fixedly installed on the front side of the worktable of a synchronous sewing machine, a support rib plate fixedly installed vertically on the top surface of the square base, and a limiting sleeve fixedly installed on the top of the support rib plate, wherein the limiting sleeve is parallel to the swing shaft.

[0009] This utility model's swing linkage assembly includes a positioning shaft fitted with a clearance within a limiting sleeve, a swing left linkage fixedly installed at the left end of the positioning shaft, and a swing right linkage fixedly installed at the right end of the positioning shaft. The swing right linkage is hinged to the front end of a long linkage via a shaft head bolt. A shaft head bolt B, which can move up and down, is fixedly installed in the long slot B of the left transmission linkage. The rear end of the long linkage is hinged to the corresponding end of the shaft head bolt B. The lower end of the swing left linkage is hinged to a pawl assembly.

[0010] This utility model's pawl assembly includes a pawl fixing seat hinged to the lower end of the swing left connecting rod via a shaft head screw, and a pawl fixedly installed at the rear end of the pawl fixing seat. A hanging spring bolt is installed at the front end of the pawl fixing seat, a hook is installed on the front side of the machine head, and a tension spring is installed between the hanging spring bolt and the hook. The pawl includes a connecting plate fixed to the pawl fixing seat, two pawl arms fixedly installed at intervals at the rear end of the connecting plate, and pawl teeth installed at the rear end of the pawl arms. The two pawl arms are in an upward arc shape, and 3-4 pawl teeth are installed at intervals on each pawl arm. The angle between the bottom surface of the pawl teeth and the horizontal plane is 40-45 degrees.

[0011] This invention provides a downward-facing V-shaped clamping platform at the bottom front end of the presser foot.

[0012] The model of this synchronous sewing machine is GC6360.

[0013] The positive effects of this invention are as follows: This invention uses an eccentric cam mounted on the main shaft to drive an eccentric connecting rod to move back and forth. This, in turn, drives the pawl assembly to move back and forth via a transmission connecting rod assembly and a swing connecting rod assembly. Adjusting the position of the eccentric connecting rod upwards within the long slot A increases the feed rate of the pawl, and vice versa. Similarly, adjusting the downward position of the long connecting rod within the long slot B increases the feed rate of the pawl, and vice versa. This allows the pawl to produce stable and uniform folds with strong consistency in fold shape. The daily output of a single machine can reach 500 pieces, an increase of over 60% compared to traditional equipment. Furthermore, the high degree of automation significantly reduces the intensity of manual intervention. The V-shaped chuck corresponds to the pawl teeth. When the pawl teeth move forward and disengage from the bottom of the presser foot, the V-shaped chuck can accommodate the folded edge of the felt after it has been gathered, preventing it from being pulled out of the presser foot. The gap between the two pawl arms serves as a needle insertion groove, facilitating sewing.

[0014] This invention is reliable and saves time and effort in sewing felt pleats on hats, greatly improving work efficiency. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Appendix Figure 2 This is a schematic diagram of the connection structure between the swing linkage assembly and the transmission linkage assembly of this utility model;

[0017] Appendix Figure 3 This is a schematic diagram of the assembly of the swing linkage assembly and the transmission linkage assembly of this utility model.

[0018] Appendix Figure 4 This is a schematic diagram of the connection structure between the transmission connecting rod assembly and the machine head of this utility model;

[0019] Appendix Figure 5 This is a schematic diagram of the claw structure of this utility model;

[0020] Appendix Figure 6 This is a schematic diagram of the presser foot sewing structure.

[0021] In the diagram: 1. Paw holder, 2. Left swing linkage, 31. Square base, 32. Support rib, 33. Limiting sleeve, 4. Right swing linkage, 5. Positioning shaft, 6. Long linkage, 7. Paw, 71. Connecting plate, 72. Paw arm, 73. Paw tooth, 8. Presser foot, 9. Left transmission linkage, 91. Long slot B, 92. Shaft head bolt B, 10. Swing shaft, 11. Right transmission linkage, 110. Long slot A, 111. Shaft head bolt A, 12. Eccentric linkage, 13. Eccentric cam, 14. Main shaft, 15. Hanging spring bolt, 16. Hook, 17. Tension spring, 18. V-shaped chuck, 19. Synchronous sewing machine body, 20. Bushing, 21. Sewing machine needle, 22. Foot pedal, 23. Felt cap. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-6 The present invention will be described in further detail below.

[0023] In this article, "fore" refers to the position corresponding to the operator. Figure 1 The A-end shown in the diagram refers to the point far from the operation point. Figure 1 The B end is shown in the diagram.

[0024] As attached Figure 1 As shown, the pleating device of the synchronous sewing machine of this utility model includes a synchronous sewing machine body 19, a fixed seat assembly installed on the front side of the worktable of the synchronous sewing machine body 19, a swing linkage assembly installed on both sides of the fixed seat assembly, a claw assembly connected to the swing linkage assembly, and a transmission linkage assembly installed on the rear side of the machine head of the synchronous sewing machine body 19; the swing linkage assembly and the transmission linkage assembly are connected by a long connecting rod 6, and the transmission linkage assembly is connected to the main shaft 14 of the synchronous sewing machine body 19 through an eccentric cam 13, and the claw end of the claw assembly corresponds to the presser foot 8 of the synchronous sewing machine body 19.

[0025] As attached Figure 1 , 2 As shown in Figures 3 and 4, the transmission linkage assembly of this utility model includes an eccentric connecting rod 12, a right transmission connecting rod 11, a swing shaft 10, and a left transmission connecting rod 9; the upper end of the right transmission connecting rod 11 is provided with a long slot A110, and the lower end of the left transmission connecting rod 9 is provided with a long slot B91; the swing shaft 10 is fixedly installed between the right transmission connecting rod 11 and the left transmission connecting rod 9; two bushings 20 are installed at intervals on the rear side of the sewing machine head, and the two ends of the swing shaft 10 are fitted into the bushings 20 with corresponding gaps and rotate circumferentially; the eccentric connecting rod 12... The front end of the eccentric connecting rod 12 is fitted with the eccentric cam 13. The shaft head bolt A111 is fixedly installed in the long slot A110 of the right transmission connecting rod 11. The rear end of the eccentric connecting rod 12 is hinged to the corresponding end of the shaft head bolt A111. Loosening the shaft head bolt A111 allows it to move up and down in the long slot A110. After the position is appropriate, tightening it locks the position, which can adjust the height of the rear end of the eccentric connecting rod 12. The swing shaft 10 is parallel to the main shaft 14, and the eccentric connecting rod 12 is perpendicular to the main shaft 14.

[0026] As attached Figure 2 , 3 As shown, the fixed base assembly of this utility model includes a square base 31 fixedly installed on the front side of the worktable of the synchronous sewing machine body 19, a support rib plate 32 vertically fixedly installed on the top surface of the square base 31, and a limiting sleeve 33 fixedly installed on the top of the support rib plate 32. The limiting sleeve 33 is parallel to the swing shaft 10.

[0027] The swing linkage assembly includes a positioning shaft 5 fitted with a clearance sleeve within a limiting sleeve 33, a swing left linkage 2 fixedly installed on the left end of the positioning shaft 5, and a swing right linkage 4 fixedly installed on the right end of the positioning shaft 5. The swing right linkage 4 is hinged to the front end of the long linkage 6 via a shaft head bolt. A shaft head bolt B92 is fixedly installed in the long slot B91 of the left transmission linkage 9. The rear end of the long linkage 6 is hinged to the corresponding end of the shaft head bolt B92. Loosening the shaft head bolt B92 allows it to move up and down in the long slot B91. After the position is appropriate, tightening it locks the position, allowing adjustment of the height of the rear end of the long linkage 6. The lower end of the swing left linkage 2 is hinged to the pawl assembly.

[0028] As attached Figure 1 , 2 As shown in Figures 3 and 5, the pawl assembly of this utility model includes a pawl fixing seat 1 hinged to the lower end of the swing left connecting rod 2 via a shaft head screw, and a pawl 7 fixedly installed at the rear end of the pawl fixing seat 1. A hanging spring bolt 15 is installed at the front end of the pawl fixing seat 1, and a hook 16 is installed on the front side of the machine head. A tension spring 17 is installed between the hanging spring bolt 15 and the hook 16. The tension spring 17 ensures sufficient force to press the felt cap 23 when the pawl 7 pushes it to the rear end. Adjusting the position of the eccentric connecting rod 12 upward in the long slot A110 increases the forward and backward feeding amount of the pawl 7 (i.e., the distance the pawl 7 pushes the felt cap to move towards the rear end of the synchronizer is increased, or the swing distance from end A to end B is increased), and vice versa. Adjusting the downward position of the long connecting rod 6 downward in the long slot B91 increases the forward and backward feeding amount of the pawl 7, and vice versa.

[0029] As attached Figure 5 As shown, the claw 7 of this utility model includes a connecting plate 71 fixed to the claw fixing seat 1, two claw arms 72 fixedly installed at intervals at the rear end of the connecting plate 71, and claw teeth 73 installed at the rear end of the claw arms 72. The two claw arms 72 are in an upward arc shape, and the gap between the two claw arms 72 is a needle insertion groove. Each claw arm 72 is equipped with 3-4 claw teeth 73 at intervals. In this embodiment, the best number is 3. The angle between the bottom surface of the claw teeth 73 and the horizontal plane is 40-45 degrees. In this embodiment, the best number is 45 degrees. This increases the friction between the claw teeth 73 and the felt when pushing the felt to the rear end for pleating. At the same time, the upward arc shape of the two claw arms 72 can lift the front end of the presser foot 8 to facilitate the pleating to enter the bottom of the presser foot 8.

[0030] A downward-facing V-shaped locking platform 18 is provided at the bottom front end of the presser foot 8. The V-shaped locking platform 18 corresponds to the tooth 73. When the tooth 73 moves forward and disengages from the bottom surface of the presser foot 8, the V-shaped locking platform 18 can accommodate the folded edge of the felt after it has been gathered, preventing it from being pulled out of the presser foot.

[0031] As attached Figure 1-6As shown, this utility model takes the working process of hat felt gathering as an example: stepping on the foot pedal 22 of the synchronous sewing machine drives the main shaft 14 to rotate, the main shaft 14 drives the rotating end of the eccentric cam 13 to rotate, the eccentric cam 13 curves and drives the eccentric connecting rod 12 to move back and forth, the eccentric connecting rod 12 drives the right transmission connecting rod 11 to swing, the right transmission connecting rod 11 drives the left transmission connecting rod 9 and the long connecting rod 6 to swing back and forth through the swing shaft 10, the long connecting rod 6 drives the lower end of the swing right connecting rod 4 to swing back and forth, the upper end of the swing right connecting rod 4 drives the lower end of the swing left connecting rod 2 to swing back and forth through the positioning shaft 5. The left connecting rod 2 moves back and forth, causing the fixed seat 1 and the pawl 7 to move. When the main shaft 14 rotates, it drives the eccentric cam 13 to rotate. When the eccentricity of the eccentric cam 13 decreases and rotates towards the rear end of the machine head, it drives the rear end tooth 73 of the pawl 7 to press the felt 23 backward under the pressure of the tension spring 19, pushing the pleat into the bottom surface of the presser foot 8. At this time, the folded edge of the felt 23 is inserted into the V-shaped locking platform 18 of the presser foot 8. The sewing machine needle 21, with thread, passes through the needle slot of the pawl and the felt 23 to sew the pleat required by the process. One folded edge is sewn. The sewing operation is repeated in this way.

[0032] This invention uses an eccentric cam 13 mounted on the main shaft to drive an eccentric connecting rod 12 to move back and forth. Through the transmission connecting rod assembly and the swing connecting rod assembly, the pawl assembly moves back and forth, enabling the pawl 7 to push out stable and uniform wrinkles with strong consistency in wrinkle shape. The daily output of a single machine can reach 500 pieces, which is more than 60% higher than that of traditional equipment. Moreover, the operation is highly automated, which greatly reduces the intensity of manual intervention.

[0033] This invention is reliable and saves time and effort in sewing felt pleats on hats, greatly improving work efficiency.

Claims

1. A gathering device for a synchronous sewing machine, characterized in that, It includes a synchronous sewing machine body (19), a fixed seat assembly installed on the front side of the worktable of the synchronous sewing machine body (19), a swing linkage assembly installed on both sides of the fixed seat assembly, a claw assembly connected to the swing linkage assembly, and a transmission linkage assembly installed on the rear side of the head of the synchronous sewing machine body (19). The swing linkage assembly and the transmission linkage assembly are connected by a long connecting rod (6). The transmission linkage assembly is connected to the main shaft (14) of the synchronous sewing machine body (19) through an eccentric cam (13). The claw end of the claw assembly corresponds to the presser foot (8) of the synchronous sewing machine body (19).

2. The gathering device for a synchronous sewing machine according to claim 1, characterized in that, The transmission linkage assembly includes an eccentric link (12), a right transmission link (11), a swing shaft (10), and a left transmission link (9); the upper end of the right transmission link (11) is provided with a long slot A (110), and the lower end of the left transmission link (9) is provided with a long slot B (91); the swing shaft (10) is fixedly installed between the right transmission link (11) and the left transmission link (9); two bushings (20) are installed at intervals on the rear side of the sewing machine head, and the two ends of the swing shaft (10) are fitted into the bushings (20) with corresponding gaps; The front end of the eccentric connecting rod (12) is fitted with the eccentric cam (13), and the shaft head bolt A (111) that can move up and down is fixedly installed in the long slot A (110) of the right transmission connecting rod (11). The rear end of the eccentric connecting rod (12) is hinged to the corresponding end of the shaft head bolt A (111). The swing shaft (10) is parallel to the main shaft (14), and the eccentric connecting rod (12) is perpendicular to the main shaft (14).

3. The gathering device for a synchronous sewing machine according to claim 2, characterized in that, The fixed base assembly includes a square base (31) fixedly installed on the front side of the worktable of the synchronous sewing machine body (19), a support rib plate (32) fixedly installed vertically on the top surface of the square base (31), and a limiting sleeve (33) fixedly installed on the top of the support rib plate (32). The limiting sleeve (33) is parallel to the swing shaft (10).

4. The gathering device of a synchronous sewing machine according to claim 3, characterized in that, The swing linkage assembly includes a positioning shaft (5) with a gap fitted inside the limiting sleeve (33), a swing left linkage (2) fixedly installed on the left end of the positioning shaft (5), and a swing right linkage (4) fixedly installed on the right end of the positioning shaft (5); The right swing link (4) is hinged to the front end of the long link (6) by a shaft head bolt. The shaft head bolt B (92) that can move up and down is fixedly installed in the long slot B (91) of the left transmission link (9). The rear end of the long link (6) is hinged to the corresponding end of the shaft head bolt B (92). The lower end of the left swing link (2) is hinged to the pawl assembly.

5. The gathering device for a synchronous sewing machine according to claim 3, characterized in that, The pawl assembly includes a pawl mounting base (1) hinged to the lower end of the swing left connecting rod (2) via a shaft head screw, and a pawl (7) fixedly mounted on the rear end of the pawl mounting base (1). A spring bolt (15) is installed at the front end of the pawl mounting base (1), a hook (16) is installed on the front side of the machine head, and a tension spring (17) is installed between the spring bolt (15) and the hook (16). The pawl (7) includes a connecting plate (71) fixed to the pawl fixing seat (1), two pawl arms (72) fixedly installed at intervals at the rear end of the connecting plate (71), and pawl teeth (73) installed at the rear end of the pawl arms (72). The two pawl arms (72) are in an upward arc shape, and 3-4 pawl teeth (73) are installed at intervals on each pawl arm (72). The bottom surface of the pawl teeth (73) is at an angle of 40-45 degrees to the horizontal plane.

6. The gathering device for a synchronous sewing machine according to claim 3, characterized in that, A downward-facing V-shaped clamping platform (18) is provided at the bottom of the front end of the presser foot (8).

7. The gathering device for a synchronous sewing machine according to claim 3, characterized in that, The synchronous sewing machine model is GC6360.

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