Double needle fixing device for sewing machine

Abstract

This utility model discloses a double-needle fixing device for sewing machines, belonging to the field of sewing machines. It includes a support base plate, with the sewing machine body mounted on its upper surface. An adjustment cavity is opened inside the sewing machine body, and a motor is mounted on its outer surface. This utility model uses the motor to drive the bidirectional threaded rod inside the adjustment cavity to rotate, causing two first sliders to slide synchronously in opposite directions. The electric adjustment of the double-needle spacing can be completed simply by operating the controller, without disassembling any parts. This design significantly shortens the adjustment time for specification changes and can well adapt to the production needs of frequently switching between different specifications of children's, adult, and outdoor cotton clothing in mass production. The electric slide rail drives the suction nozzle on the second slider to move synchronously. Combined with the negative pressure generated by the vacuum cleaner, it can promptly suck up fiber debris and thread ends generated during needle operation, preventing them from clogging the needles and causing equipment jamming, ensuring smooth sewing.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically a double-needle fixing device for sewing machines. Background Technology

[0002] In modern cotton-padded garment production lines, the high-speed quilting and simultaneous sealing integrated process is considered the "core engine" for improving production efficiency. This process combines the traditional two steps of quilting (creating decorative or reinforcing stitches on the fabric surface through needle and thread) and sealing (using high temperature to melt the adhesive film and adhere it to the fabric seams for sealing) into a continuous operation: when the double needles complete the quilting stitches at high speed, the sealing component immediately follows to simultaneously heat and press the area around the stitches. This not only eliminates the intermediate step of "quilting first, then transferring to the sealing station" in the traditional process, reducing the processing time of a single cotton-padded garment by more than 40%, but also avoids errors caused by secondary fabric positioning through the tightness of the process connection.

[0003] In cotton-padded clothing production, the requirements for double-needle spacing vary significantly depending on the size of the garment. Existing double-needle fixing devices often involve cumbersome operation when adjusting the spacing, making it difficult to meet the production needs of different sizes of cotton-padded clothing. For children's cotton-padded clothing, which is designed to fit a petite size and delicate decorative stitching, the double-needle spacing needs to be set narrower. For adult regular cotton-padded clothing, which balances warmth and structural strength, the spacing needs to be kept at a medium width. However, for outdoor windproof cotton-padded clothing, which requires enhanced seam sealing, the spacing needs to be adjusted to a range slightly narrower than that of adult regular cotton-padded clothing. Therefore, this utility model provides a double-needle fixing device for sewing machines to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] This utility model provides a double-needle fixing device for sewing machines, which aims to solve the problem mentioned in the background art that it is inconvenient to adjust the spacing of the double needles during processing.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: It includes a supporting base plate, on the upper surface of which a sewing machine body is mounted. An adjustment cavity is provided inside the sewing machine body. A motor is mounted on the outer surface of the sewing machine body. The output end of the motor passes through the sewing machine body and is fitted with a bidirectional threaded rod. Two first sliders are threadedly connected to the outer surface of the bidirectional threaded rod. A communication port is provided on the bottom surface of the sewing machine body. An electric lifting rod is mounted on the bottom surface of each first slider, and a machine needle is mounted on the output end of each electric lifting rod.

[0008] As a preferred technical solution of this application, an electric slide rail is installed on the upper surface of the support base plate, and a second slider is slidably connected to the outer surface of the electric slide rail.

[0009] As a preferred technical solution of this application, a dust collection box is installed on the upper surface of the support base plate, and a controller is installed on the upper surface of the support base plate.

[0010] As a preferred technical solution of this application, two support plates are installed on the upper surface of the support base plate, and a vacuum cleaner is installed on the upper surface of the two support plates together.

[0011] As a preferred technical solution of this application, the input end of the vacuum cleaner is connected to a vacuum hose, and the end of the vacuum hose away from the vacuum cleaner passes through the second slider and is connected to a vacuum nozzle.

[0012] As a preferred technical solution of this application, the output end of the vacuum cleaner is connected to a conveying pipe, and the end of the conveying pipe away from the vacuum cleaner is connected to the outer surface of the vacuum box.

[0013] As a preferred technical solution of this application, a filter plate is installed inside the dust collection box, a dust collection frame is installed inside the dust collection box, and a door is hinged to the outer surface of the dust collection box.

[0014] (III) Beneficial Effects

[0015] This invention uses a motor to drive the bidirectional threaded rod inside the adjustment chamber to rotate, causing the two first sliders to slide synchronously in opposite directions. The electric adjustment of the needle spacing can be completed simply by operating the controller, without disassembling any parts. This design significantly shortens the adjustment time for specification switching and reduces equipment downtime. It can well adapt to the production needs of frequently switching between different specifications of children's, adult, and outdoor cotton clothing in mass production. The electric slide rail drives the dust suction nozzle on the second slider to move synchronously. With the negative pressure generated by the vacuum cleaner, it can promptly suck up fiber debris and thread ends generated during the needle operation. This not only prevents these impurities from sticking to the fabric and affecting the quilting aesthetics, but also prevents them from clogging the needles and causing the equipment to jam, ensuring the smooth operation of the sewing process. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a double-needle fixing device for a sewing machine;

[0017] Figure 2 This is a right view of a double-needle fixing device for a sewing machine;

[0018] Figure 3 A cross-sectional view of a double-needle fixing device for a sewing machine;

[0019] Figure 4A cross-sectional view of a double-needle fixing device for a sewing machine;

[0020] Figure 5 This is a rear view of a double-needle fixing device for a sewing machine.

[0021] In the picture:

[0022] 1. Support base plate; 2. Sewing machine body; 3. Controller; 4. Electric slide rail; 5. Vacuum nozzle; 6. Box door; 7. Vacuum box; 8. Vacuum cleaner; 9. Conveyor pipe; 10. Vacuum frame; 11. Support plate; 12. Vacuum hose; 13. Filter plate; 14. Motor; 15. Needle; 16. Bidirectional threaded rod; 17. First slider; 18. Adjustment chamber; 19. Connecting port; 20. Second slider; 21. Electric lifting rod. Detailed Implementation

[0023] 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.

[0024] This utility model provides a double-needle fixing device for a sewing machine, including a support base plate 1. A sewing machine body 2 is mounted on the upper surface of the support base plate 1. An adjustment cavity 18 is opened inside the sewing machine body 2. A motor 14 is mounted on the outer surface of the sewing machine body 2. The output end of the motor 14 passes through the sewing machine body 2 and is connected to a bidirectional threaded rod 16. Two first sliders 17 are threadedly connected to the outer surface of the bidirectional threaded rod 16. A communication port 19 is opened on the bottom surface of the sewing machine body 2. An electric lifting rod 21 is mounted on the bottom surface of each first slider 17. A needle 15 is mounted on the output end of each electric lifting rod 21. Under the drive of the electric lifting rod 21, the needle moves up and down at high frequency, piercing the fabric and cooperating with the thread to form a thread. The quilted stitch and the adjustment cavity 18 are located inside the sewing machine body 2, providing a closed installation space for the bidirectional threaded rod 16 and the first slider 17, restricting the movement trajectory of the slider, ensuring its stable sliding along the axial direction of the threaded rod, and protecting the adjustment mechanism from contamination and maintaining transmission accuracy. The output end of the motor 14 drives the bidirectional threaded rod 16 to rotate, converting electrical energy into mechanical motion, which drives the first slider 17 to move through the threaded transmission, realizing the automatic adjustment of the spacing between the double needles 15, improving efficiency and accuracy. The electric lifting rod 21 connects the first slider 17 and the needle 15, and can extend and retract at high frequency under the command of the controller 3, driving the needle 15 to move up and down to complete the piercing action. At the same time, its extension and retraction range can be adjusted according to the fabric thickness.

[0025] like Figure 1As shown, an electric slide rail 4 is installed on the upper surface of the support base plate 1. A second slider 20 is slidably connected to the outer surface of the electric slide rail 4. By driving the second slider 20 to slide along a preset trajectory, the suction nozzle 5 moves synchronously, ensuring that the suction nozzle 5 is always aligned with the working area of ​​the needle 15. This solves the problem that the fixed suction position cannot completely clean up the debris. A dust collection box 7 is installed on the upper surface of the support base plate 1, and a controller 3 is installed on the upper surface of the support base plate 1. The dust collection box 7 serves as the "collection and processing center" for debris, receiving the debris conveyed by the conveying pipe 9. Inside, the dust is filtered and stored in stages through the filter plate 13 and the dust collection frame 10, avoiding environmental pollution caused by direct discharge of debris. Two support plates 11 are installed on the upper surface of the support base plate 1, and a vacuum cleaner 8 is installed on the upper surface of the two support plates 11. By generating negative pressure, the suction nozzle 5 forms an adsorption force, drawing the debris through the suction hose 12 and the conveying pipe 9 to the dust collection box 7, providing continuous power for debris cleaning and ensuring that debris is removed in a timely manner during the sewing process.

[0026] like Figure 5 As shown, the input end of the vacuum cleaner 8 is connected to a vacuum hose 12. The end of the vacuum hose 12 away from the vacuum cleaner 8 passes through the second slider 20 and is connected to a vacuum nozzle 5. The vacuum hose 12 connects the input end of the vacuum cleaner 8 and the vacuum nozzle 5. It is flexible and can freely extend, retract, or bend with the movement of the second slider 20. This ensures that the vacuum nozzle 5 maintains airflow communication with the vacuum cleaner 8 while moving along the sewing path, without affecting the vacuuming function. The output end of the vacuum cleaner 8 is connected to a conveying pipe 9. The end of the conveying pipe 9 away from the vacuum cleaner 8 is connected to the outer surface of the vacuum box 7. The conveying pipe 9 connects the output end of the vacuum cleaner 8 and the vacuum box 7, serving as a "channel" for conveying debris. It stably guides the debris sucked up by the vacuum cleaner 8 into the vacuum box 7, ensuring the sealing of the debris transmission path and preventing leakage and pollution of the production environment.

[0027] like Figure 4 As shown, a filter plate 13 is installed inside the dust collection box 7, and a dust collection frame 10 is installed inside the dust collection box 7. A door 6 is hinged to the outer surface of the dust collection box 7. The filter plate 13 is installed inside the dust collection box 7 as a filter barrier for debris, intercepting larger clumps of yarn and fabric fragments sent in by the conveying pipe 9. The filter plate 13 is installed inside the dust collection box 7 to collect fine dust and debris after being filtered, making it convenient for operators to empty and clean it.

[0028] Working Principle: During use, after the operator fixes the device on the production line, they input the target double-needle spacing parameters into the controller 3 externally, based on the specifications of the cotton garment to be processed (e.g., narrow spacing for children's garments, medium spacing for adult garments). The controller 3 then sends a command to the motor 14. The output of the motor 14 drives the bidirectional threaded rod 16 inside the adjustment cavity 18 of the sewing machine body 2 to rotate. Since the two first sliders 17 are threadedly connected to the threaded rod with opposite thread directions, the rotation of the threaded rod causes the two sliders to slide synchronously in opposite directions along the rod. This, in turn, links the electric lifting rod 21 through the connecting port 19, adjusting the double needles 15 to the preset spacing. Once the preset parameters are reached, the motor 14 automatically stops. After adjustment, the operator places the cotton garment fabric on the worktable directly below the corresponding needle on the support base plate 1. Once the sewing position is aligned with the initial landing point of the needle 15, the electric lifting rod 21 is in a retracted state, keeping the needle at a safe height to avoid contact with the fabric. Subsequently, the controller 3 issues a sewing command, and the electric lifting rod 21 begins a high-frequency extension and retraction motion, driving the needle 15 to pierce the fabric at high speed. In conjunction with the bobbin thread mechanism built into the sewing machine, continuous quilted stitches are formed on the fabric surface. During the sewing process, the extension and retraction range of the electric lifting rod 21 will automatically adapt to the fabric thickness to ensure consistent stitch depth and flat, firm stitches. When a section of fabric is sewn and a change in specifications is required, the controller 3 receives a stop signal, and the electric lifting rod 21 quickly retracts, driving the needle 15 back to a safe height. Both the motor 14 and the lifting rod stop working. The operator removes the processed fabric, replaces it with new fabric, and repeats the above steps to continue production.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A double-needle fixing device for a sewing machine, comprising a supporting base plate (1), characterized in that: The upper surface of the support base plate (1) is equipped with a sewing machine body (2). An adjustment cavity (18) is provided inside the sewing machine body (2). A motor (14) is installed on the outer surface of the sewing machine body (2). The output end of the motor (14) passes through the sewing machine body (2) and is equipped with a bidirectional threaded rod (16). Two first sliders (17) are threadedly connected to the outer surface of the bidirectional threaded rod (16). A communication port (19) is provided on the bottom surface of the sewing machine body (2). An electric lifting rod (21) is installed on the bottom surface of each first slider (17). A machine needle (15) is installed at the output end of each electric lifting rod (21).

2. The double-needle fixing device for a sewing machine according to claim 1, characterized in that: An electric slide rail (4) is installed on the upper surface of the support base plate (1), and a second slider (20) is slidably connected to the outer surface of the electric slide rail (4).

3. The double-needle fixing device for a sewing machine according to claim 1, characterized in that: A dust collection box (7) is installed on the upper surface of the support base plate (1), and a controller (3) is installed on the upper surface of the support base plate (1).

4. A double-needle fixing device for a sewing machine according to claim 1, characterized in that: Two support plates (11) are installed on the upper surface of the support base plate (1), and a vacuum cleaner (8) is installed on the upper surface of the two support plates (11).

5. A double-needle fixing device for a sewing machine according to claim 4, characterized in that: The vacuum cleaner (8) has a vacuum hose (12) connected to its input end. The end of the vacuum hose (12) away from the vacuum cleaner (8) passes through the second slider (20) and is connected to the vacuum nozzle (5).

6. A double-needle fixing device for a sewing machine according to claim 4, characterized in that: The output end of the vacuum cleaner (8) is connected to a delivery pipe (9), and the end of the delivery pipe (9) away from the vacuum cleaner (8) is connected to the outer surface of the vacuum box (7).

7. A double-needle fixing device for a sewing machine according to claim 3, characterized in that: The dust collection box (7) is equipped with a filter plate (13) inside, a dust collection frame (10) inside, and a door (6) is hinged to the outer surface of the dust collection box (7).

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