An auxiliary device for a flat sewing machine

Abstract

This utility model relates to the field of garment processing, specifically an auxiliary device for a flat sewing machine. It includes a mounting plate, a flat sewing machine body mounted on the top of the mounting plate, a steel needle mounted on the output end of the flat sewing machine body, a mounting block mounted on the left side of the output end of the flat sewing machine body near the steel needle, a feed dog fixedly connected to the bottom of the mounting block, a pressing rod provided on the front side of the mounting block, the bottom of the pressing rod being flush with the bottom of the feed dog, a fixing plate slidably mounted on the top of the mounting plate near the rear side of the feed dog, and a support plate fixedly connected to the top of the fixing plate near the left side of the feed dog. This application utilizes a positioning rod that, under the force of a tension spring, embeds into positioning holes at different positions, thereby facilitating the adjustment of the height of the slider and guide rod. This allows for flexible adaptation to fabrics of different sizes and shapes, effectively increasing the support area of ​​the flat sewing region, allowing the fabric to fit over and slide on the outer wall of the guide rod, thus solving the fabric slippage problem and improving sewing stability.

Description

Technical Field

[0001] This utility model relates to the field of garment processing, specifically to an auxiliary device for a flat sewing machine. Background Technology

[0002] A flatbed sewing machine is a machine that uses a single thread to create a stitch on the fabric, allowing one or more layers of fabric to interweave or sew together. It is generally divided into two types: one for thin materials and one for thick materials. Flatbed sewing machines can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, as well as products made of leather, plastic, and paper. Thin materials are generally used for knitwear, underwear, shirts, and uniforms, while thick materials are generally used for various sportswear, denim, fashion apparel, coats, shoes, hats, leather goods, and bags. The flatbed sewing machine is the most basic type of sewing equipment. It produces the simplest stitch, resulting in neat, beautiful, even, flat, and strong stitches. It is fast, easy to operate, and simple to understand. A flatbed sewing machine is needed when processing the ribbing of the cuffs of heated cotton clothing.

[0003] Chinese Patent No. CN213772479U discloses a flat sewing machine that slides a placement plate out of a cavity between a U-shaped frame and a worktable. After sliding out, a positioning component keeps the placement plate stable. Once stable, the required fabric and clothing can be placed on the upper surface, allowing the operator to easily retrieve them. When the device is no longer needed, the placement plate can be slid back into the cavity, thus ensuring that the placement plate does not occupy space and improving the practicality of the device.

[0004] However, the patent has the following defects in operation: when processing fabric, it mainly solves the problem of storage of the shelf. In actual operation, it lacks a mechanism to assist the support area on the left side of the feed dog. This results in a small support area in the flat seam area when supporting fabrics of different specifications. Furthermore, due to the different sizes of the fabrics, the fabrics are prone to wrinkles when the user picks them up because of their different sizes and qualities. Utility Model Content

[0005] This utility model aims to provide an auxiliary device for a flat sewing machine, mainly to solve the technical problem that the existing technology lacks a mechanism to assist the support area on the left side of the feed dog, resulting in a small support area in the flat sewing area when supporting fabrics of different specifications. Furthermore, due to the different sizes and qualities of the fabrics, the fabrics are prone to wrinkling during processing.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: An auxiliary device for a flat sewing machine includes a mounting plate, a flat sewing machine body mounted on the top of the mounting plate, a steel needle mounted on the output end of the flat sewing machine body, a mounting block mounted on the left side of the output end of the flat sewing machine body near the steel needle, a feed dog fixedly connected to the bottom of the mounting block, a squeezing rod provided on the front side of the mounting block, the bottom of the squeezing rod being flush with the bottom of the feed dog, a fixing plate slidably mounted on the top of the mounting plate near the rear side of the feed dog, a support plate fixedly connected on the top of the fixing plate near the left side of the feed dog, a slider slidably mounted on the support plate, a fixing rod fixedly connected to the rear side of the slider, a tension spring sleeved on the outer side of the fixing rod, a sliding plate slidably connected to the outer wall of the fixing rod, one end of the tension spring connected to the sliding plate, a positioning rod fixedly connected to the rear side of the sliding plate, several positioning holes opened on one side of the support plate, one end of the positioning rod fitting into the inner wall of the positioning hole, and a guide rod fixedly connected to the front side of the slider.

[0007] The working principle and beneficial effects of this utility model: 1. Working Principle: Since one end of the tension spring is connected to the slide plate, the slide plate can drive the positioning rod to embed into the positioning holes at different positions. This facilitates the adjustment of the height of the slider and guide rod, allowing for flexible adaptation to fabrics of different sizes and shapes. This effectively increases the support area of ​​the flat seam area, allowing the fabric to fit over the outer wall of the guide rod and slide there, thus solving the fabric slippage problem and improving sewing stability. When the feed dog and the pressure rod simultaneously press the fabric, this increases the support area of ​​the back flat seam area. Combined with the pressure of the pressure rod, it reduces deformation caused by the fabric's weight, further optimizing sewing efficiency and stitch consistency. The sliding of the fixed plate allows for easy adjustment of the distance between the support plate and the feed dog, ensuring that fabrics of different specifications are accurately fed onto the feed dog, ensuring uniform seam size, avoiding human error, and reducing frequent adjustments due to fabric displacement. This comprehensively improves both efficiency and quality.

[0008] 2. Beneficial effects: (1) The positioning rod is embedded in the positioning hole at different positions under the action of the tension spring, so as to facilitate the adjustment of the height of the slider and the guide rod, thereby flexibly adapting to fabrics of different sizes and shapes, effectively increasing the support area of ​​the flat seam area, making it convenient for the fabric to be fitted on the outer wall of the guide rod and slide on the outer wall of the guide rod, thereby solving the problem of fabric slippage and improving sewing stability.

[0009] (2) When the feed dog descends due to the start of the flat sewing machine body, the feed dog and the extrusion bar press the fabric at the same time, thereby increasing the support area of ​​the back flat sewing area. This, combined with the extrusion bar pressing the fabric, reduces the deformation caused by the weight of the fabric, and further optimizes sewing efficiency and stitch consistency.

[0010] (3) The fixed plate slides through the moving groove on the outer wall of the second screw, which facilitates the adjustment of the distance between the support plate and the feed dog, ensuring that different specifications of fabric can be accurately fed to the feed dog, ensuring uniform seam size, avoiding manual operation errors, and reducing frequent adjustments caused by fabric displacement, thus comprehensively improving efficiency and quality.

[0011] Preferably, a first screw is fixedly connected to the front side of the mounting block, one end of the extrusion rod is sleeved on the outer wall of the first screw, and a nut is connected to one end of the first screw near the front side of the extrusion rod; one end of the extrusion rod is sleeved on the outer wall of the first screw, and then the nut is rotated counterclockwise to install the nut on the first screw, so that the nut extrudes the extrusion rod, thereby restricting and fixing the position of the extrusion rod. At this time, the bottom of the extrusion rod is flush with the bottom end of the feed tooth.

[0012] Preferably, the top of the fixing plate has a movable groove, and a second screw is fixedly connected to the top of the mounting plate near the inside of the movable groove. The outer wall of the second screw is adapted to the inner wall of the movable groove, and the second screw passes through the movable groove. A nut is connected to the outer wall of the second screw.

[0013] Preferably, the support plate has a through groove on its front and rear sides, and the outer wall of the slider is slidably connected to the inner wall of the groove; pulling the slider causes it to slide up and down in the groove, thereby adjusting the height of the guide rod driven by the slider.

[0014] Preferably, a baffle is fixedly connected to one end of the fixed rod, and one end of the tension spring is fixedly connected to the front side of the baffle, while the other end is fixedly connected to the rear side of the slider; due to the restriction of the baffle, the slide can only slide on the fixed rod.

[0015] Preferably, there are two positioning rods arranged symmetrically. Pulling the slide plate towards the rear of the support plate causes the slide plate to slide on the outer wall of the fixed rod. The slide plate causes the tension spring to stretch, and at the same time, the slide plate causes the positioning rod to separate from the positioning hole at the current position, thereby releasing the restriction on the slider.

[0016] Preferably, the positioning holes are provided in two sets, which are located on both sides of the slide groove and are symmetrically arranged. Each set of positioning holes has several holes, and the holes are arranged in a linear array at equal intervals. When the positioning rod is aligned with the positioning holes at different heights, the slide plate is released. Due to the reaction force of the tension spring, the positioning rod on the front side of the slide plate is driven to embed into the positioning holes at different heights, thereby facilitating the adjustment of the height of the slider and the guide rod. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an auxiliary device for a flat sewing machine according to the present invention; Figure 2 This is a front view of an auxiliary device for a flat sewing machine according to the present invention; Figure 3 This is a structural diagram of a fixing plate for an auxiliary device of a flat sewing machine according to the present invention; Figure 4 This is a cross-sectional view of a support plate for an auxiliary device of a flat sewing machine according to the present invention; Figure 5 This is a structural diagram of an extrusion rod for an auxiliary device of a flat sewing machine according to the present invention; Figure 6 This is an exploded view of the first screw and nut of an auxiliary device for a flat sewing machine according to the present invention.

[0018] The reference numerals in the accompanying drawings of the instruction manual include: 1. Mounting plate; 2. Flat sewing machine body; 3. Steel needle; 4. Mounting block; 5. Feed dog; 6. First screw; 7. Nut; 8. Extrusion rod; 9. Fixing plate; 10. Moving groove; 11. Second screw; 12. Nut; 13. Support plate; 14. Slide groove; 15. Sliding block; 16. Fixing rod; 17. Baffle; 18. Tension spring; 19. Slide plate; 20. Positioning rod; 21. Positioning hole; 22. Guide rod. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-6 As shown, an auxiliary device for a flat sewing machine includes a mounting plate 1. A flat sewing machine body 2 is mounted on the top of the mounting plate 1. A steel needle 3 is mounted on the output end of the flat sewing machine body 2. A mounting block 4 is mounted on the left side of the output end of the flat sewing machine body 2 near the steel needle 3. A feed dog 5 is fixedly connected to the bottom end of the mounting block 4. A pressing rod 8 is provided on the front side of the mounting block 4. A first screw 6 is fixedly connected to the front side of the mounting block 4. One end of the pressing rod 8 is sleeved on the outer wall of the first screw 6. A nut 7 is connected to one end of the first screw 6 near the front side of the pressing rod 8. The nut 7 is rotated clockwise to separate the nut 12 from the first screw 6. Then, one end of the pressing rod 8 is sleeved on the outer wall of the first screw 6. The nut 7 is then rotated counterclockwise to install the nut 7 on the first screw 6, so that the nut 7 presses the pressing rod 8, thereby restricting and fixing the position of the pressing rod 8. At this time, the bottom of the pressing rod 8 is flush with the bottom end of the feed dog 5. The bottom of the extrusion rod 8 is flush with the bottom of the feed tooth 5. A fixing plate 9 is slidably mounted on the top of the mounting plate 1 near the rear side of the feed tooth 5. A moving groove 10 is opened on the top of the fixing plate 9. A second screw 11 is fixedly connected inside the moving groove 10 near the top of the mounting plate 1. The outer wall of the second screw 11 is adapted to the inner wall of the moving groove 10, and the second screw 11 passes through the moving groove 10. A nut 12 is connected to the outer wall of the second screw 11. A support plate 13 is fixedly connected on the left side of the top of the fixing plate 9 near the feed tooth 5. A slider 15 is slidably mounted on the support plate 13. The same sliding groove 14 is opened through the front and rear sides of the support plate 13. The outer wall of the slider 15 is slidably connected to the inner wall of the sliding groove 14. Rotating the nut 12 clockwise separates it from the fixed plate 9, thus releasing the pressure on the fixed plate 9 and allowing it to slide along the outer wall of the second screw 11 via the moving groove 10. This facilitates adjusting the distance between the support plate 13 and the feed dog 5. After adjustment, rotating the nut 12 clockwise moves it downwards on the second screw 11. When the bottom of the nut 12 is in close contact with the top of the fixed plate 9, the position of the fixed plate 9 is fixed, ensuring that fabrics of different specifications can be accurately fed onto the feed dog 5, ensuring uniform seam allowance, avoiding human error, and reducing frequent adjustments caused by fabric displacement, thereby improving both efficiency and quality. A fixing rod 16 is fixedly connected to the rear side of the slider 15. A tension spring 18 is sleeved on the outer side of the fixing rod 16. A sliding plate 19 is slidably connected to the outer wall of the fixing rod 16. One end of the tension spring 18 is connected to the sliding plate 19. A baffle 17 is fixedly connected to one end of the fixing rod 16. One end of the tension spring 18 is fixedly connected to the front side of the baffle 17, and the other end is fixedly connected to the rear side of the slider 15. A positioning rod 20 is fixedly connected to the rear side of the sliding plate 19. Several positioning holes 21 are opened on one side of the support plate 13. One end of the positioning rod 20 is connected to the inner wall of the positioning hole 21. To match, a guide rod 22 is fixedly connected to the front side of the slider 15. Two positioning rods 20 are provided, which are symmetrically arranged. Two sets of positioning holes 21 are provided, which are located on both sides of the slide groove 14 and are symmetrically arranged. Each set of positioning holes 21 has several holes, which are arranged in a linear array at equal intervals. Pulling the slide plate 19 to the rear side of the support plate 13 causes the slide plate 19 to slide on the outer wall of the fixed rod 16. The slide plate 19 drives the tension spring 18 to stretch. Simultaneously, the slide plate 19 causes the positioning rod 20 to separate from the positioning hole 21 at the current position, thereby releasing the restriction on the slider 15. Pulling the slider 15 allows it to slide up and down in the groove 14. When the positioning rod 20 aligns with the positioning holes 21 at different heights, the slide plate 19 is released. Due to the reaction force of the tension spring 18, the positioning rod 20 on the front side of the slide plate 19 is driven to embed into the positioning holes 21 at different heights. This facilitates the adjustment of the height of the slider 15 and the guide rod 22, allowing for flexible adaptation to fabrics of different sizes and shapes. This effectively increases the support area of ​​the flat seam area, making it easier for the fabric to fit on the outer wall of the guide rod 22 and slide on it, thus solving the problem of fabric slippage and improving sewing stability. When the feed dog 5 descends due to the start of the flat sewing machine body 2, the feed dog 5 and the pressing rod 8 simultaneously press the fabric, thereby increasing the support area of ​​the rear flat seam area. Combined with the pressing rod 8, this reduces deformation caused by the weight of the fabric, further optimizing sewing efficiency and stitch consistency.

[0021] As described above, the specific implementation of this utility model is as follows: Rotate the nut 7 clockwise to separate the nut 12 from the first screw 6. Then, sleeve one end of the extrusion rod 8 on the outer wall of the first screw 6. Rotate the nut 7 counterclockwise to install the nut 7 on the first screw 6, and make the nut 7 extrude the extrusion rod 8, thereby restricting and fixing the position of the extrusion rod 8. At this time, the bottom of the extrusion rod 8 is flush with the bottom of the feed tooth 5. Pull the slide plate 19 to the rear side of the support plate 13, so that the slide plate 19 slides on the outer wall of the fixed rod 16. The slide plate 19 drives the tension spring 18 to stretch. At the same time, the slide plate 19 drives the positioning rod 20 to separate from the positioning hole 21 at the current position, thereby releasing the restriction on the slider 15. Pull the slider 15 to make the slider 15 slide up and down in the slide groove 14. When the positioning rod 20 is not When the positioning holes 21 of the same height are aligned, the slide plate 19 is released. Due to the reaction force of the tension spring 18, the positioning rod 20 on the front side of the slide plate 19 is driven to embed into the positioning holes 21 of different heights. This makes it easy to adjust the height of the slider 15 and the guide rod 22, so as to flexibly adapt to fabrics of different sizes and shapes, effectively increase the support area of ​​the flat seam area, and make it easy for the fabric to fit on the outer wall of the guide rod 22 and slide on the outer wall of the guide rod 22, thereby solving the problem of fabric slippage and improving sewing stability. When the feed dog 5 is lowered due to the start of the flat sewing machine body 2, the feed dog 5 and the extrusion rod 8 press the fabric at the same time, thereby increasing the support area of ​​the rear flat seam area. Combined with the extrusion rod 8 pressing the fabric, the deformation caused by the weight of the fabric is reduced, further optimizing sewing efficiency and stitch consistency. In addition, rotating the nut 12 counterclockwise separates it from the fixed plate 9, thereby relieving the pressure on the fixed plate 9 and allowing it to slide along the outer wall of the second screw 11 via the moving groove 10. This facilitates adjusting the distance between the support plate 13 and the feed dog 5. After adjustment, rotating the nut 12 clockwise moves it downwards on the second screw 11. When the bottom of the nut 12 is in close contact with the top of the fixed plate 9, the position of the fixed plate 9 is fixed, ensuring that fabrics of different specifications can be accurately fed onto the feed dog 5, ensuring uniform seam size, avoiding human error, and reducing frequent adjustments caused by fabric displacement, thus comprehensively improving efficiency and quality.

[0022] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An auxiliary device for a flat sewing machine, comprising a mounting plate (1), a flat sewing machine body (2) mounted on the top of the mounting plate (1), a steel needle (3) mounted on the output end of the flat sewing machine body (2), and a mounting block (4) mounted on the left side of the output end of the flat sewing machine body (2) near the steel needle (3), characterized in that, The bottom of the mounting block (4) is fixedly connected to the feed tooth (5). The front side of the mounting block (4) is provided with a squeezing rod (8). The bottom of the squeezing rod (8) is flush with the bottom of the feed tooth (5). The top of the mounting plate (1) is slidably provided with a fixing plate (9) near the back of the feed tooth (5). The top of the fixing plate (9) is fixedly connected with a support plate (13) near the left side of the feed tooth (5). The support plate (13) is slidably provided with a slider (15). The back of the slider (15) is fixedly connected with a fixing rod (16). The outside of the fixing rod (16) is fitted with a tension spring (18). The outer wall of the fixing rod (16) is slidably connected with a slide plate (19). One end of the tension spring (18) is connected to the slide plate (19). The back of the slide plate (19) is fixedly connected with a positioning rod (20). Several positioning holes (21) are opened on one side of the support plate (13). One end of the positioning rod (20) is adapted to the inner wall of the positioning hole (21). The front side of the slider (15) is fixedly connected with a guide rod (22).

2. The auxiliary device for a flat sewing machine according to claim 1, characterized in that: The mounting block (4) is fixedly connected to the front of the first screw (6), and one end of the extrusion rod (8) is sleeved on the outer wall of the first screw (6). One end of the first screw (6) is connected to the nut (7) near the front of the extrusion rod (8).

3. An auxiliary device for a flat sewing machine according to claim 1, characterized in that: The top of the fixed plate (9) is provided with a moving groove (10). The top of the mounting plate (1) is fixedly connected to the inside of the moving groove (10). The outer wall of the second screw (11) is adapted to the inner wall of the moving groove (10), and the second screw (11) passes through the moving groove (10). The outer wall of the second screw (11) is connected to a nut (12).

4. An auxiliary device for a flat sewing machine according to claim 1, characterized in that: The support plate (13) has the same sliding groove (14) through its front and rear sides, and the outer wall of the slider (15) is slidably connected to the inner wall of the sliding groove (14).

5. An auxiliary device for a flat sewing machine according to claim 1, characterized in that: One end of the fixed rod (16) is fixedly connected to a baffle (17), one end of the tension spring (18) is fixedly connected to the front side of the baffle (17), and the other end is fixedly connected to the rear side of the slider (15).

6. An auxiliary device for a flat sewing machine according to claim 1, characterized in that: There are two positioning rods (20), and the two positioning rods (20) are arranged symmetrically.

7. An auxiliary device for a flat sewing machine according to claim 1, characterized in that: The positioning holes (21) are provided in two sets. The two sets of positioning holes (21) are located on both sides of the slide groove (14) respectively, and the two sets of positioning holes (21) are symmetrically arranged. Each set of positioning holes (21) has a number of holes, and the number of positioning holes (21) are arranged in a linear array at equal intervals.

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