Sidecutting knife overlock machine with a flange presser foot

Abstract

The utility model relates to sewing machine technical field provides a kind of side cutting knife flat bed sewing machine of baffle presser foot and with baffle presser foot.Baffle presser foot includes feeding presser plate and baffle;Baffle includes the soft baffle made of rubber material;Baffle can be used as independent component;Baffle is fixed on feeding presser plate using fastening component or the way of gluing;Baffle side edge position is also provided with broken seam;Baffle presser foot also includes cutter slot, and baffle is approximately '' J '' shape extension to cutter slot right side on feeding presser plate;The side cutting knife flat bed sewing machine of present scheme uses above-mentioned baffle presser foot;Side cutting knife flat bed sewing machine includes tool rest, and soft baffle is accurate with the edge portion when being able to adhere to tool rest movement in highest position, or through fastening component, soft baffle side edge portion is fixedly connected on tool rest.The present scheme more effectively solves the phenomenon of sewing machine's roll card material, improves the safety factor of side cutting knife flat bed sewing machine, and greatly improves production efficiency.

Description

[Technical Field]

[0001] This invention belongs to the field of sewing machine technology, specifically relating to a side-cutting flat sewing machine that includes a presser foot with a guard and a presser foot with a guard. [Background Technology]

[0002] When sewing thick materials such as cotton or wool with a flatbed sewing machine, the raw edges of the material often get rolled up or stuck at the base of the presser foot and the needle hole of the needle plate, leading to material damage, needle breakage, and thread breakage. This is because the raw edges of the material are too close to the needle. In order to improve sewing efficiency, ordinary flatbed sewing machines have adopted boat-shaped edge-blocking presser feet (such as the T35 presser foot) to solve this problem. However, the edge of the boat-shaped edge presser foot is rigid. In order to take into account the need to thread the needle during the sewing process, the height of the edge is generally not designed to be too high. In addition, there is usually a small gap left on the side of the edge near the needle to facilitate threading. Therefore, when sewing some thicker cotton or wool fabrics, the rough edge can still get caught in the needle eye. For some special small presser feet with a smaller feed plate (such as the P363 and T363 presser feet), it is even more impossible to design a rigid edge (as it would collide with the needle bar). Therefore, the existing edge presser feet still have some unavoidable design defects.

[0003] In side-cut flatbed sewing machines, due to the unique nature of the cutting blade, its proximity to the presser foot means there is currently no suitable edge-guarding presser foot. Practical experience has shown that existing side-cut flatbed sewing machines (using the B1524 model 522NAA1 / 8 presser foot) easily accumulate scraps under the blade holder when trimming heavily roughened, thick fabrics, leading to curling and jamming. If the machine is not braked promptly during sewing, needle and thread breakage is highly likely, and the machine can easily be damaged. Furthermore, the cutting blade of the side-cut flatbed sewing machine protrudes from the presser foot edge, posing a safety hazard and increasing psychological pressure for novice sewing workers, resulting in both safety risks and reduced production efficiency. [Summary of the Invention]

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a side-cutting flat sewing machine that can more effectively avoid problems such as material rolling and jamming during sewing, and to improve the safety factor of the side-cutting flat sewing machine.

[0005] The edge retainer foot described in this solution includes a feeding plate and an edge retainer provided on the edge of the feeding plate. The edge retainer, or at least its side portion, includes a soft edge retainer made of elastic rubber material. The edge retainer can be used as an independent component, which is convenient for disassembly, installation, or replacement. A fastening member is provided between the feeding plate and the edge retainer. The edge retainer can be installed and fixed on the feeding plate by means of the fastening member, or the edge retainer can be installed and fixed on the feeding plate by gluing.

[0006] The guard foot also includes a cutting groove on the right side of the feeding plate. This guard foot is specifically designed for side-cutting flat sewing machines. The guard extends from the front end or left front end of the feeding plate in an approximately "J" shape to the right side of the cutting groove, at least blocking the cutting edge of the side-cutting flat sewing machine, thus avoiding the risk of the sewing worker's fingers coming into direct contact with the cutting blade during operation.

[0007] The side-cutting flat sewing machine described in this solution uses the edge guard presser foot described in this solution;

[0008] The side-cutting flat sewing machine described in this solution includes a blade holder for mounting the right-hand cutter blade and a flexible guard foot. The height of the portion of the flexible guard foot on the right side of the cutter groove is such that it can abut against the edge of the blade holder when it is in its highest position. Alternatively, a fastening member can be provided between the flexible guard foot and the blade holder. Through the fastening member, the side edge portion of the flexible guard foot can be stably connected to the blade holder. Even when the blade holder moves up and down, the portion of the flexible guard foot that is in contact with the blade holder will only undergo flexible deformation and will not experience rigid collision. There will never be a gap between the flexible guard foot and the blade holder. The scrap material cut off by the cutter will not be squeezed and carried into the inside of the guard foot due to the up and down movement of the blade holder, thus achieving the purpose of completely isolating the scrap material from the cutter and the needle.

[0009] The side portion of the baffle described in this solution is also provided with at least one seam, so that the flexible baffle can deform more under external force, making it easier to thread the wire.

[0010] This technical solution uses a flexible edge protector for the presser foot. It utilizes the property that elastic rubber deforms under external force and quickly returns to its original shape after the force is removed. This makes threading easier compared to a hard edge protector during sewing, solving the unavoidable design defects of hard edge protector presser feet. It also solves the problem that dedicated small presser feet cannot be designed with edge protectors. Furthermore, it solves the problem that existing side-cut flat sewing machines do not have a compatible edge protector presser foot. This not only improves the safety factor of side-cut flat sewing machines but also significantly increases production efficiency.

[0011] [Practical Explanation]

[0012] To more clearly and intuitively demonstrate the beneficial effects of this technical solution, this solution selects the manufacturing process requirements of ordinary cotton-padded clothing, using the process of trimming the cotton-containing cut pieces (back pieces) of cotton-padded clothing with a side-cut flat sewing machine as the standard. Based on a 7-hour workday, data comparing the output of different levels of sewing workers before and after adopting this technical solution is presented as follows:

[0013] Before adopting this technical solution, the average daily output of junior lathe operators was 152 pieces; after adopting this technical solution, the average daily output was 310 pieces; the overall improvement was 103.9%.

[0014] Before adopting this technical solution, the average daily output of intermediate-level machinists was 315 pieces; after adopting this technical solution, the average daily output was 648 pieces; the overall improvement was 105.7%.

[0015] Before adopting this technology, the average daily output of senior machinists was 425 pieces; after adopting this technology, the average daily output was 1084 pieces, representing an overall increase of 155%.

[0016] Through practical comparison, the output of sewing machine operators at different levels has been greatly improved after adopting this technical solution. According to the feedback from the sewing machine operators, after adopting this technical solution, they no longer need to worry about cotton being caught in the needle hole of the needle plate, they no longer need to use their right hand to press the rough edges, and they are not afraid of their fingers touching the cutter. This greatly reduces the fatigue of the sewing machine operators, the machine speed can be adjusted to the fastest speed, and the cotton trimming efficiency of the side-cut flat sewing machine is strongly stimulated, and there is still room for output to increase. [Attached Image Description]

[0017] Figure 1 , Figure 2 This is a schematic diagram of the side-cutting flat sewing machine in this technical solution, which uses a side guard presser foot.

[0018] Figure 3 , 4 Figures 5, 6, and 7 are structural schematic diagrams of the retaining edge presser foot in this technical solution;

[0019] exist Figures 1-7 In the diagram, 1 is the feeding plate; 2 is the flexible guard; 3 is the fastening component between the feeding plate and the flexible guard; 4 is the cutter groove; 5 is the cutter; 6 is the cutter holder; and 7 is the fastening component between the flexible guard and the cutter holder.

Detailed Implementation Methods

[0020] like Figures 1-7 As shown, the implementation of this solution includes a feeding plate 1 and a flexible baffle 2 disposed on the feeding plate 1. The flexible baffle 2 is made of elastic rubber material; the flexible baffle 2 can be installed on the feeding plate 1 by fastening components 3 (e.g., ...). Figures 1-3(as shown); Alternatively, the flexible guard 2 can be glued onto the feeding plate 1 (as shown). Figures 4-7 (as shown); therefore, the soft guard 2 can be used as an independent component, which is convenient for disassembly, installation or replacement;

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the implementation of this solution also includes a cutter groove 4, and a flexible baffle 2 extends from the front end or left front end of the feeding pressure plate 1 in an approximately "J" shape to the cutter groove 4 at a position that can at least block the blade edge of the side-cutting flat sewing machine's cutter 5; the height of the flexible baffle 2 near the highest part of the blade holder 6 can abut against the edge of the blade holder 6 when it is in its highest position (e.g., Figure 2 (as shown); or the side edge of the flexible guard 1 can be stably connected to the tool holder 6 by means of the fastening member 7 (as shown). Figure 1 (as shown);

[0022] Figure 5 , Figure 7 The image shows a dedicated small presser foot with a flange, which solves the problem that existing small presser feet cannot be designed with flanges.

[0023] like Figure 1 , 2 As shown in Figures 3, 4, and 5, the side portion of the soft guard 2 is also provided with at least one seam, so that the soft guard 2 can deform more under external force, making it easier to thread the wire.

Claims

1. A side guard presser foot, comprising a feeding plate and a side guard disposed on the feeding plate, characterized in that: The entire or at least the side portion of the guard includes a soft guard made of rubber.

2. The retaining foot according to claim 1, characterized in that: The retaining foot also includes a cutting groove located on the right side of the feeding plate. The retaining edge extends from the front end or left front end of the feeding plate in an approximately "J" shape to the right side of the cutting groove.

3. The retaining foot according to claim 1 or 2, characterized in that: The flange can be used as an independent component, making it easy to disassemble, install, or replace.

4. The retaining foot according to claim 1 or 2, characterized in that: Fastening components are provided on the feeding plate and the side guard, and the side guard is fixed to the feeding plate by the fastening components.

5. The retaining foot according to claim 1 or 2, characterized in that: The side guard is fixed to the feeding plate by gluing.

6. The retaining foot according to claim 1 or 2, characterized in that: At least one break is provided on the side of the retaining edge.

7. A side-cutting flat sewing machine, characterized in that: The edge retaining foot described in claim 1 or 2, 3, 4, 5, or 6 is used.

8. A side-cutting flat sewing machine, comprising a blade holder for mounting a cutter and a side guard presser foot as described in claim 2, characterized in that: in A fastening member is provided between the edge of the edge retainer and the tool holder. The fastening member can stably connect the side edge of the edge retainer to the tool holder.

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