An automatic overlock sewing mechanism of an overlock machine

Abstract

The utility model discloses an automatic overlock sewing mechanism of overlock machine, including cloth guide plate, cloth guide plate one end is installed and falls the tooth, cloth guide plate front side is equipped with cloth guide groove, cloth guide groove gradually reduces along the direction of the width of approaching tooth, the overlock sewing mechanism still includes extrusion structure, the extrusion mechanism includes two pressure plates of relatively setting at the one end of cloth guide groove width smaller, two pressure plates respectively with the adjusting assembly for adjusting the interval between two pressure plates is connected, when cloth and overlock strip are exported from the one end of cloth guide groove width smaller, the interval between two pressure plates can be adjusted through adjusting assembly to press two pressure plates on overlock strip to make overlock strip close to cloth both sides to the overlock processing effect of cloth can be improved to the cloth of different thickness can be applicable to overlock processing, and the scope of application is wide.

Description

Technical Field

[0001] This utility model relates to the field of fabric edging technology, and in particular to an automatic edging and sewing mechanism for an overlock sewing machine. Background Technology

[0002] Overlocking is a common sewing technique used to finish the edges of fabric, prevent fraying, enhance aesthetics, or improve durability. Traditional overlocking involves manually folding and wrapping the binding strip around the fabric, then sewing it in place using a sewing machine. This method is inefficient and produces poor results. Existing automatic overlocking machines utilize a guide plate with a feed dog at one end and a guide groove on the front side. The width of the guide groove gradually decreases towards the feed dog. When the fabric and binding strip pass through the groove, the guide strip automatically folds and wraps around the fabric, eliminating the need for manual folding. However, this method has drawbacks: because the narrower end of the guide groove has a fixed width, it can only be used for overlocking fabrics of a single thickness. For fabrics of different thicknesses, when the fabric and binding strip exit from the narrower end of the guide groove, the binding strip cannot fit snugly against the sides of the fabric after folding, resulting in poor finishing and limiting its applicability. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an automatic edge-sealing mechanism for overlock sewing machines. This solves the technical problem that in existing automatic edge-sealing mechanisms for overlock sewing machines, the smaller end of the guide groove has a fixed size, thus limiting its application to edge-sealing fabrics of a single thickness. For fabrics of different thicknesses, when the fabric and the edge strip are output from the smaller end of the guide groove, the edge strip cannot be tightly attached to both sides of the fabric after folding, resulting in poor edge-sealing effect and limited applicability.

[0004] To achieve the above technical objectives, the present invention provides an automatic overlock sewing mechanism for an overlock sewing machine, including a guide plate, a guide tooth installed at one end of the guide plate, a guide groove provided on the front side of the guide plate, the width of the guide groove gradually decreasing along the direction close to the guide tooth, and the overlock sewing mechanism further including a pressing structure, the pressing structure including two pressure plates disposed opposite to each other at the end of the guide groove with a smaller width, the two pressure plates being respectively connected to an adjusting component for adjusting the distance between the two pressure plates.

[0005] Furthermore, the adjustment assembly includes two connecting rods. The back of the guide plate has two sliding holes, and the two connecting rods are slidably disposed inside the two sliding holes. One end of the two connecting rods located inside the guide groove is connected to two pressure plates, and the other end of the two connecting rods located outside the guide groove is provided with a movable hole. The adjustment assembly also includes a drive rod, with both ends of the drive rod movably disposed inside the movable holes of the two connecting rods. The drive rod has a threaded hole in the middle, and a threaded rod is threadedly connected inside the threaded hole. The threaded rod is rotatably mounted on the back of the guide plate through a bearing.

[0006] Furthermore, the distance between the two sliding holes gradually decreases from the end with the larger width of the guide groove to the end with the smaller width of the guide groove.

[0007] Furthermore, a handle is installed at one end of the threaded rod.

[0008] Furthermore, the opposite sides of the two pressure plates are respectively attached to the two sides of the inner wall of the guide cloth groove.

[0009] Furthermore, both pressure plates have a beveled edge on the side of the end near the wider end of the guide groove.

[0010] Furthermore, a serpentine transfer frame is installed at the wider end of the guide cloth groove.

[0011] The beneficial effects of this utility model include: 1. When the fabric and binding strip are output from the narrower end of the guide groove, the distance between the two pressure plates can be adjusted by adjusting the component to press the two pressure plates onto the binding strip and make the binding strip tightly adhere to both sides of the fabric, thereby improving the binding effect of the fabric. Therefore, it is suitable for binding fabrics of different thicknesses and has a wide range of applications. 2. The drive rod can be moved by rotating the threaded rod. The drive rod can drive the two connecting rods to slide inside the two sliding holes to adjust the distance between the two pressure plates. The adjustment is convenient. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the automatic edge-sealing mechanism of the overlock sewing machine according to an embodiment of the present utility model; Figure 2 This is another state diagram of the automatic edge-sealing mechanism of the overlock sewing machine according to an embodiment of this utility model; Figure 3 yes Figure 2 Enlarged view of point A; In the diagram: 1. Guide plate; 11. Guide groove; 12. Sliding hole; 2. Drop tooth; 3. Extrusion structure; 31. Pressure plate; 311. Inclined surface; 32. Adjustment component; 321. Connecting rod; 3211. Movable hole; 322. Drive rod; 3221. Threaded hole; 323. Threaded rod; 324. Bearing; 325. Handle; 4. Serpentine transfer frame. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0014] This utility model embodiment provides an automatic edge-sealing mechanism for an overlock sewing machine, such as... Figure 1-2 As shown, the device includes a guide plate 1, with a toothed edge 2 installed at one end. A guide groove 11 is provided on the front side of the guide plate 1. The width of the guide groove 11 gradually decreases towards the toothed edge 2 (the wider end of the guide groove 11 is the input end, and the narrower end is the output end). When binding the fabric, the binding strip is inserted into the guide groove 11 from the wider end and exits from the narrower end to fold the binding strip. Simultaneously, the fabric passes between the folded binding strips. When the fabric and binding strip pass under the toothed edge 2, the binding strip can be sewn onto the fabric, thus binding the fabric without the need for manual folding and wrapping of the binding strip onto the fabric during binding. This makes it easier to sew the edges of the fabric and improves the edge-sealing effect. The edge-sealing mechanism also includes a pressing structure 3, which includes two pressure plates 31 that are positioned opposite each other at the narrower end of the guide groove 11. The two pressure plates 31 are respectively connected to an adjusting component 32 for adjusting the distance between the two pressure plates 31. When the fabric and the edge strip are output from the narrower end of the guide groove 11, the distance between the two pressure plates 31 can be adjusted by the adjusting component 32 to press the two pressure plates 31 onto the edge strip and make the edge strip fit tightly against both sides of the fabric, thereby improving the edge-sealing effect. Therefore, it is applicable to edge-sealing fabrics of different thicknesses and has a wide range of applications.

[0015] In this embodiment, as Figure 3As shown, the adjustment assembly 32 includes two connecting rods 321. The back of the guide plate 1 has two sliding holes 12, and the distance between the two sliding holes 12 gradually decreases from the wider end of the guide groove 11 to the narrower end. The two connecting rods 321 are respectively positioned inside the two sliding holes 12. The ends of the two connecting rods 321 located inside the guide groove 11 are respectively connected to two pressure plates 31. The ends of the two connecting rods 321 located outside the guide groove 11 are respectively provided with movable holes 3211. The adjustment assembly 32 also includes... The drive rod 322 has two ends that are movably disposed inside the movable holes 3211 of the two connecting rods 321. The drive rod 322 has a threaded hole 3221 in the middle, and a threaded rod 323 is threadedly connected inside the threaded hole 3221. The threaded rod 323 is rotatably mounted on the back of the guide plate 1 through the bearing 324. By rotating the threaded rod 323, the drive rod 322 can be moved. The drive rod 322 can drive the two connecting rods 321 to slide inside the two sliding holes 12 to adjust the distance between the two pressure plates 3, which is convenient to operate.

[0016] In this embodiment, a handle 325 is installed at one end of the threaded rod 323. The handle 325 has an "I" shaped structure, which can facilitate the rotation of the threaded rod 323. In other embodiments, the handle 325 can be replaced by a motor to automatically drive the threaded rod 323 to rotate.

[0017] In this embodiment, the opposite sides of the two pressure plates 31 are respectively attached to the two sides of the inner wall of the guide groove 11. At the same time, the side of the two pressure plates 31 near the wider end of the guide groove 11 is provided with a slope 311 so that the binding strip inside the guide groove 11 can be stably inserted between the two pressure plates 31 after folding, so as to avoid the binding strip and the fabric getting stuck inside the guide groove 11.

[0018] In this embodiment, a serpentine transfer frame 4 is installed at the wider end of the guide groove 11. The serpentine transfer frame 4 allows the binding strip to enter the guide groove 11 smoothly from the wider end, thereby improving the folding effect of the binding strip.

[0019] Specific principle: When binding the fabric, the binding strip is inserted into the guide groove 11 from the wider end and exits from the narrower end to fold the binding strip. At the same time, the fabric is passed through the folded binding strip. After the fabric is passed through the folded binding strip, the threaded rod 323 is rotated. The threaded rod 323 can drive the drive rod 322 to move. The drive rod 322 can drive the two connecting rods 321 to slide inside the two sliding holes 12 to adjust the distance between the two pressure plates 3, so that the two pressure plates 31 are pressed on the binding strip and the binding strip is tightly attached to both sides of the fabric. When the fabric and the binding strip pass under the tooth 2, the binding strip can be sewn onto the fabric to bind the fabric. Therefore, it is applicable to binding fabrics of different thicknesses and has a wide range of applications.

[0020] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An automatic overlock sewing mechanism for an overlock sewing machine, comprising a guide plate (1), one end of which is fitted with a guide tooth (2), and a guide groove (11) is provided on the front side of the guide plate (1), the width of which gradually decreases along the direction close to the guide tooth (2), characterized in that, The edge-sealing mechanism also includes a pressing structure (3), which includes two pressure plates (31) arranged at the narrower end of the guide groove (11). The two pressure plates (31) are respectively connected to an adjusting component (32) for adjusting the distance between the two pressure plates (31).

2. The automatic overlock sewing mechanism of the overlock sewing machine according to claim 1, characterized in that, The adjustment assembly (32) includes two connecting rods (321). The back of the guide plate (1) is provided with two sliding holes (12). The two connecting rods (321) are slidably disposed inside the two sliding holes (12). One end of the two connecting rods (321) located in the guide groove (11) is connected to two pressure plates (31) respectively. The other end of the two connecting rods (321) located outside the guide groove (11) is provided with a movable hole (3211). The adjustment assembly (32) also includes a drive rod (322). Both ends of the drive rod (322) are movably disposed inside the movable holes (3211) of the two connecting rods (321). The middle part of the drive rod (322) is provided with a threaded hole (3221). A threaded rod (323) is threadedly connected inside the threaded hole (3221). The threaded rod (323) is rotatably mounted on the back of the guide plate (1) through a bearing (324).

3. The automatic overlock sewing mechanism of the overlock sewing machine according to claim 2, characterized in that, The distance between the two sliding holes (12) gradually decreases from the end with the larger width of the guide groove (11) to the end with the smaller width of the guide groove (11).

4. The automatic overlock sewing mechanism of the overlock sewing machine according to claim 2, characterized in that, A handle (325) is installed at one end of the threaded rod (323).

5. The automatic overlock sewing mechanism of the overlock sewing machine according to claim 2, characterized in that, The two pressure plates (31) are respectively attached to the inner sides of the guide groove (11) on opposite sides.

6. The automatic overlock sewing mechanism of the overlock sewing machine according to claim 2, characterized in that, Both pressure plates (31) have a bevel (311) on the side of the larger end of the guide groove (11).

7. The automatic overlock sewing mechanism of the overlock sewing machine according to claim 1, characterized in that, The wider end of the guide groove (11) is equipped with a serpentine transfer frame (4).

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