Edge covering tool for flat seaming machine

Abstract

The utility model relates to the technical field of auxiliary devices of flat seaming machines, and mainly discloses an edge covering tool for a flat seaming machine, which comprises a first support hinged to a machine head, a second support provided with a driving roller and a driven roller, a fixed slideway and an adjustable slideway capable of moving horizontally. A connecting rod sliding block mechanism driven by an air cylinder controls the adjustable sliding way to move, automatic position switching of an elastic band from the edge of a cloth strip to the interior of an interlayer in the sewing process is achieved, a horn-shaped inlet of the fixed sliding way is matched with an anti-skid roller set to ensure the conveying stability of the elastic band, and an outlet of the L-shaped adjustable sliding way and a guide groove of an edge covering device extend in the same direction. According to the scheme, manual intervention is replaced with automatic displacement control, sewing of the head section and the tail section of the elastic band and avoiding of the middle section are completed in the continuous sewing process, and the problems that in the traditional technology, sewing threads are staggered, and efficiency is low are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for cover-up machines, specifically a binding tool for cover-up machines. Background Technology

[0002] In the production of clothing, home textiles, and elastic fabrics, binding is often combined with elastic bands to enhance the elasticity and fit of the product. For example, it is used in areas such as the underband of bras and the waistband of sports pants. The elastic bands provide elastic support, while the binding process prevents the fabric from fraying. Local elastic designs are used in areas such as the waist and cuffs to adapt to changes in body shape and improve wearing comfort. In traditional processes, the combination of elastic bands and fabric is usually done by overlapping the elastic band and fabric, and then sewing it in place along the entire length of the elastic band using a coverstitch machine.

[0003] As a highly efficient multi-needle chain stitch sewing machine, the core function of a coverstitch machine is to create a covering stitch through the coordinated movement of upper and lower curved needles and straight needles, thereby achieving elastic binding of the fabric. In traditional coverstitch machine applications, the elastic band needs to be fed into the sewing area synchronously with the fabric throughout the entire process, and the sewing stitch must cover the entire length of the elastic band.

[0004] The core function of elastic bands is to provide a snug fit through elastic deformation. If the middle area is fixed by stitching, its elastic deformation ability will be completely limited by the stitch tension. Therefore, in some applications, such as... Figure 5 As shown, the process requires that only the two ends of the elastic band be sewn, while the middle area is left unsewn.

[0005] In existing technologies, manual intervention is required to pause the feeding process and manually shift the elastic band. However, manual adjustment makes it difficult to ensure consistent positioning of the elastic band during sewing, easily leading to defects such as misaligned stitches or exposed elastic band. Frequent start-ups and shutdowns or manual operation significantly reduce production efficiency. Therefore, solutions relying on manual intervention suffer from inconsistent quality and high costs, making it difficult to meet the requirements of high-precision, high-efficiency industrial production. Utility Model Content

[0006] This utility model provides an edge-binding fixture for a coverstitch machine, which automatically and dynamically adjusts the position of the elastic band to achieve segmented sewing of the elastic band edge-binding strip, thereby meeting the process requirements for edge-binding strips in certain application scenarios.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a binding fixture for a coverstitch machine, comprising a first support mounted on the machine head of the coverstitch machine and a second support mounted on the first support. A wire clamp is provided above the first support. An active roller and a driven roller are provided on the second support. The active roller is connected to a motor. A fixed slide is provided below the first support. A third support is provided below the first support. An adjustable slide is provided below the fixed slide. A driving device is provided on the third support. The driving device is used to adjust the position of the adjustable slide in the horizontal direction. An edge binder is also provided at the bottom of the machine head of the coverstitch machine. The outlet of the edge binder and the outlet of the adjustable slide are both located at the front end of the machine needle of the coverstitch machine.

[0008] Using the above technical solution, one end of the elastic band passes sequentially through the wire clamp, the drive roller and the driven roller, the fixed slide, and the adjustable slide. The other end of the fabric strip passes through the exit of the binding device. The binding device adjusts the edge of the fabric strip into the required shape. The elastic band is placed between two layers of fabric strips. The coverts sewing machine head is used to bind and sew the fabric strip with the elastic band. When sewing the first end, the adjustable slide is in the first position, at which time the elastic band is flush with the edge of the fabric strip. After sewing several stitches, the drive device controls the adjustable slide to the second position, so that the elastic band is offset from the edge of the fabric strip and placed inside the fabric strip. At this time, the coverts sewing machine continues to sew. After sewing the required length, the adjustable slide is reset, and the elastic band returns to the edge of the fabric strip. The tail end is then sewn. By using the above-mentioned edge-binding fixture, an edge-binding elastic band fabric strip that meets the special process requirements can be sewn.

[0009] A further aspect of this invention is that the adjustable slide is L-shaped, the direction of the inlet end of the adjustable slide is consistent with the direction of the outlet end below the fixed slide, the direction of the outlet end of the adjustable slide is parallel to the extension direction of the outlet guide groove of the hemming device, and the direction of the outlet end of the adjustable slide and the extension direction of the outlet guide groove of the hemming device are consistent with the feeding direction of the overlock sewing machine.

[0010] A further aspect of this invention is that the distance between the lower outlet end of the fixed slide and the upper inlet end of the adjustable slide is 5-10mm.

[0011] A further aspect of this utility model is that the driving device includes a cylinder, a connecting seat, a connecting rod, a slide rail, and a slider. The cylinder is mounted on a third support, the cylinder's push rod is hinged to the connecting seat, one end of the connecting rod is hinged to the connecting seat, and the other end of the connecting rod is hinged to the slider. The slider is slidably connected to the slide rail, and the adjustable slide is fixedly connected to the slider.

[0012] A further aspect of this invention is that the first support is fixed to the head of the overlock sewing machine via a hinge mounting seat.

[0013] A further aspect of this invention is that anti-slip stripes are provided on the outer wall of the driving roller or the driven roller.

[0014] A further aspect of this invention is that the upper inlet end of the fixed slide is directly opposite the roll gap between the driving roller and the driven roller.

[0015] A further aspect of this invention is that the upper opening of the fixed slide is a flared, funnel-shaped structure.

[0016] A further aspect of this invention is that the binding device is fixed to the bottom of the cover-sewing machine head via an adjustable bracket.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention provides an edge-binding fixture for a coverstitch machine. Through an adjustable slide displacement mechanism driven by a cylinder, it automatically switches the position of the elastic band between the beginning and end sewing sections and the middle non-sewing section. During sewing, it automatically and precisely shifts the elastic band from the edge of the fabric strip to the interior of the interlayer, solving the problems of exposed elastic band or misaligned stitching caused by manual operation. When the cylinder pushes the slider along the slide rail, the adjustable slide causes the elastic band to shift laterally by 5-8mm, ensuring that the middle section of the elastic band is completely concealed within the fabric interlayer. Combined with the edge-binding device, it achieves automatic sewing of the edge-binding fabric strip. Adjustments to the driving roller, driven roller, and thread clamp ensure the tension stability of the elastic band during transport. The overall structure of this edge-binding fixture enables a continuous operation mode of sewing and adjustment simultaneously, completely eliminating production interruptions caused by equipment start-up and shutdown in traditional processes, and significantly improving sewing efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the edge-pulling fixture of this utility model;

[0021] Figure 2 This is a perspective view of the edge-pulling fixture of this utility model;

[0022] Figure 3 This is a reference for the application of the edge-pulling fixture of this utility model in a cover-sewing machine. Figure 1 ;

[0023] Figure 4This is a reference for the application of the edge-pulling fixture of this utility model in a cover-sewing machine. Figure 2 ;

[0024] Figure 5 This is a diagram illustrating the sewing of a fabric strip with elastic bands.

[0025] In the diagram, 1. First support; 2. Motor; 3. Wire clamp; 4. Second support; 5. Driven roller; 6. Driven roller; 7. Third support; 8. Fixed slide rail; 9. Adjustable slide rail; 10. Cylinder; 11. Connecting seat; 12. Connecting rod; 13. Slide rail; 14. Slider; 15. Hemming device; 16. Hinge mounting seat; 17. Fabric strip; 18. Elastic band; 19. Stitch; 20. Coverstitch machine head; 21. Coverstitch machine needle; 22. Coverstitch machine sewing table; 23. Table body. Detailed Implementation

[0026] like Figure 1-4 As shown, an edge-binding fixture for a coverstitch machine includes a first support 1 fixed to the machine head 20 of the coverstitch machine, a wire clamp 3 disposed above the first support 1, a second support 4 mounted on the first support 1, a drive roller 6 and a driven roller 5 disposed on the second support 4, a fixed slide rail 8 fixed below the first support 1, an adjustable slide rail 9 that can move horizontally left and right, and a drive device for driving the adjustable slide rail 9.

[0027] like Figure 4 As shown, the coverstitch machine used in this embodiment includes a table body 23 and a coverstitch machine head 20. The coverstitch machine head 20 is fixed above the table body 23, and a coverstitch machine sewing table 22 is provided below the coverstitch machine head 20. The coverstitch machine needle 21 is placed directly above the coverstitch machine sewing table 22. One base plate of the hinge mounting base 16 is vertically fixed to the left side wall of the coverstitch machine head 20 by bolts, and the first support 1 is fixed to the other base plate of the hinge mounting base 16 by bolts. The rotation axis of the hinge mounting base 16 can be locked by bolts. The other base plate is parallel to the front of the coverstitch machine head 20, and the two base plates are in a vertical state. After locking the rotation axis, the edge-pulling fixture is in working condition.

[0028] A driving roller 6 and a driven roller 5 are mounted in parallel on the second support 4. The two ends of the driving roller 6 and the driven roller 5 are rotatably connected to the two ends of the second support 4 via bearings. Anti-slip stripes are machined on the surface of the driving roller 6. The motor 2 is mounted on the left side of the first bracket, and the shaft of the motor 2 is fixedly connected to the driving roller 6 via a keyway.

[0029] The fixed slide 8 is passed through the bottom of the first bracket, with its flared opening aligned directly below the gap between the driving roller 6 and the driven roller 5. The fixed slide 8 is then secured with bolts. Below the fixed slide 8 is a rectangular guide groove. The adjustable slide 9 is L-shaped, with its inlet end aligned with the outlet end of the fixed slide 8. The outlet end of the adjustable slide 9 is parallel to the extension direction of the outlet guide groove of the overlock machine 15. The outlet end of the adjustable slide 9 and the extension direction of the outlet guide groove of the overlock machine 15 are aligned with the feeding direction of the overlock machine. The distance between the lower outlet end of the fixed slide 8 and the upper inlet end of the adjustable slide 9 is 5-10 mm.

[0030] The driving device includes a cylinder 10, a connecting seat 11, a connecting rod 12, a slide rail 13, and a slider 14. The cylinder 10 is mounted on the third support 7. The push rod of the cylinder 10 is hinged to the connecting seat 11. One end of the connecting rod 12 is hinged to the connecting seat 11, and the other end of the connecting rod 12 is hinged to the slider 14. The slider 14 is slidably connected to the slide rail 13, and the adjustable slide 9 is fixedly connected to the slider 14. The third support 7 is an L-shaped angle iron. The cylinder 10 is fixed below the third support 7 by a mounting base. The push rod of the cylinder 10 is connected to the connecting seat 11 by a ball joint. The two ends of the connecting rod 12 are respectively connected to the connecting seat 11 and the slider 14 by pins.

[0031] The wire clamp 3 described in this embodiment is existing technology. It includes two clamping pieces, with a spring between the two clamping pieces. The two clamping pieces are passed through by a screw, and a nut is installed at one end of the screw. A spring is provided between the nut and one of the clamping pieces. The rotation of the nut adjusts the distance between the two clamping pieces, thereby adjusting the feed tightness of the elastic band 18.

[0032] A further aspect of this invention is that the binding device 15 is fixed to the bottom of the cover-sewing machine head 20 by an adjustable bracket.

[0033] The edge binding device 15 is existing technology. The edge binding device 15 (also known as edge binding puller or edge rolling device) is a core guiding component of sewing equipment such as coverstitch machines and overlock machines. It is used to automatically fold the edge of the fabric into a specific shape (such as double-layer edge rolling, wrapping elastic band, etc.) and guide it to the sewing area to complete the stitch sewing.

[0034] Through the above technical solution, one end of the elastic band 18 is passed through the wire clamp 3, the driving roller 6 and the driven roller 5, the fixed slide 8 and the adjustable slide 9 in sequence, and one end of the fabric strip 17 is passed through the outlet of the edge binding device 15. The edge of the fabric strip 17 is guided into the edge binding device 15 and folded to form a double-layer structure, so that the elastic band 18 is naturally embedded in the fabric strip 17 interlayer. The elastic band 18 is placed between the two layers of fabric strip 17, and the edge binding of the fabric strip 17 with the elastic band 18 is performed by the cover-stitch machine head 20.

[0035] like Figure 5 As shown, during the initial sewing stage, the cylinder 10 is in a retracted state, and the adjustable slide 9 is in the first position of the inner reference position. At this time, the elastic band 18 is flush with the edge of the fabric strip 17, and the stitch 19 completely covers the edge of the elastic band 18.

[0036] After several stitches are sewn, the solenoid valve controls the cylinder 10 to push out, and the drive device controls the adjustable slide 9 to be in the second position. The connecting rod 12 pushes the slider 14 to move to the right along the slide rail 13. The adjustable slide 9 drives the elastic band 18 to retract to the center of the fabric strip 17 interlayer. At this time, the cover stitch machine continues to sew. This section of stitch 19 only sews the 17 layers of fabric strip.

[0037] After sewing the tail end back to the starting position, the cylinder 10 is reset and retracted after sewing the required length. The adjustable slide 9 returns to the reference position, the elastic band 18 is realigned with the edge of the fabric strip 17, and the tail end is sewn.

[0038] Using the aforementioned edge-pulling fixture, elastic band fabric strips that meet special process requirements can be sewn.

[0039] This invention utilizes an adjustable slide rail 9 displacement mechanism driven by a cylinder 10 to automatically switch the position of the elastic band 18 between the beginning and end sewing sections and the middle non-sewing section. During the sewing process, it automatically completes the precise displacement switching of the elastic band 18 from the edge of the fabric strip 17 to the interior of the interlayer, solving the problem of the elastic band 18 being exposed or the stitching being misaligned due to manual operation. When the cylinder 10 pushes the slider 14 to move along the slide rail 13, the adjustable slide rail 9 drives the elastic band 18 to achieve a lateral displacement of 5-8mm, ensuring that the middle section of the elastic band 18 is completely concealed within the interlayer of the fabric strip 17. Combined with the edge binding device 15, it achieves automatic sewing of the edge binding fabric strip 17. The adjustment of the active roller 6, the driven roller 5, and the thread clamp 3 ensures the tension stability of the elastic band 18 during the conveying process. The overall structure of this edge-pulling fixture enables a continuous operation mode of sewing and adjusting simultaneously, completely eliminating production interruptions caused by equipment start-up and shutdown in traditional processes, and significantly improving sewing efficiency.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A binding tool for a flat seaming machine, characterized by: The machine includes a first support (1) mounted on the head (20) of a cover-sewing machine and a second support (4) mounted on the first support (1). A wire clamp (3) is provided above the first support (1). An active roller (6) and a driven roller (5) are provided on the second support (4). The active roller (6) is connected to a motor (2). A fixed slide (8) is provided below the first support (1). A third support (7) is provided below the first support (1). An adjustable slide (9) is provided below the fixed slide (8). A drive device is provided on the third support (7). The drive device is used to adjust the position of the adjustable slide (9) in the horizontal direction. An edge binder (15) is also provided at the bottom of the head (20) of the cover-sewing machine. The outlet of the edge binder (15) and the outlet of the adjustable slide (9) are both located at the front end of the cover-sewing machine needle (21).

2. A binding tool for a flat seaming machine according to claim 1, characterized in that: The drive device includes a cylinder (10), a connecting seat (11), a connecting rod (12), a slide rail (13), and a slider (14). The cylinder (10) is mounted on the third support (7). The top rod of the cylinder (10) is hinged to the connecting seat (11). One end of the connecting rod (12) is hinged to the connecting seat (11), and the other end of the connecting rod (12) is hinged to the slider (14). The slider (14) is slidably connected to the slide rail (13), and the adjustable slide (9) is fixedly connected to the slider (14).

3. The binding tool for a flat seaming machine according to claim 1, wherein: The adjustable slide (9) is L-shaped. The direction of the inlet end of the adjustable slide (9) is consistent with the direction of the outlet end below the fixed slide (8). The direction of the outlet end of the adjustable slide (9) is parallel to the extension direction of the outlet guide groove of the edge banding device (15). The direction of the outlet end of the adjustable slide (9) and the extension direction of the outlet guide groove of the edge banding device (15) are consistent with the feeding direction of the overlock sewing machine.

4. The binding tool for a flat seaming machine according to claim 2, wherein: The distance between the lower outlet end of the fixed slide (8) and the upper inlet end of the adjustable slide (9) is 5-10mm.

5. The binding tool for a flat seaming machine according to claim 1, wherein: The outer wall of the driving roller (6) or driven roller (5) is provided with anti-slip stripes.

6. A binding tool for a flat seaming machine according to claim 1, wherein: The upper inlet end of the fixed slide (8) is directly opposite the roll gap between the driving roller (6) and the driven roller (5).

7. A binding tool for a flat seaming machine according to claim 6, characterized in that: The upper opening of the fixed slide (8) is a flared structure.

8. A binding tool for a flat seaming machine according to any one of claims 1 to 7, characterized in that: The binding device (15) is fixed to the bottom of the head (20) of the overlock sewing machine by an adjustable bracket.

9. A binding tool for a flat seaming machine according to claim 8, characterized in that: The first support (1) is fixed to the head (20) of the overlock sewing machine via a hinge mounting seat (16).

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