Automatic thread trimming device for double-needle machine

Abstract

The utility model relates to the technical field of sewing machines, and discloses an automatic thread trimming device for a double-needle machine, which comprises a machine body, a lifting device is mounted at the bottom of the machine body, a supporting seat is arranged at the bottom of the lifting device, a pressing plate is fixed at the bottom of the supporting seat, and adjusting grooves are formed in two sides of the bottom of the machine body. An adjusting seat is slidably connected to the interior of the adjusting groove, a sewing needle is fixed to the bottom of the adjusting seat, and sliding rods are slidably connected to the two sides of the interior of the adjusting seat. According to the automatic thread trimming device for the double-needle machine, a round plate is pressed to drive a sliding rod to move towards the interior of an adjusting base, a fixing plate drives a clamping block to be separated from the interior of a clamping groove, an operator can adjust the position of the adjusting base at the moment, then the distance between two sewing needles is adjusted, the double-needle machine is more flexible in the sewing process, and the sewing efficiency is improved. The double-needle machine adapts to fabrics with different thicknesses and materials, the application range of the double-needle machine is widened, and operation is easy and convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to an automatic thread trimmer for double-needle sewing machines. Background Art

[0002] A double-needle sewing machine, also called a double-needle flatbed sewing machine, is a commonly used sewing machine with two needles that work in two or three synchronous ways and can sew at corners. The result is that two threads are parallel to each other. However, it is indispensable. Although a flatbed sewing machine can sometimes replace a double needle, it is used to do the work of a double needle in batch production for efficiency reasons. Unless it is a small-scale production, the double needle has high efficiency and the parallel double threads are regular and beautiful.

[0003] A Chinese patent discloses an automatic thread trimming mechanism for a double-needle machine with automatic thread trimming (authorization announcement number CN213571035U). This patented technology is characterized by providing a thread trimming blade inside the movable frame, and hingedly connecting a rotating pull plate to one end of the movable frame away from the rocker. A limiting groove is provided on the outer side of the rotating pull plate, and a hollow groove is provided inside the rotating pull plate, so that the thread can be accurately positioned and cut, which is conducive to improving work efficiency.

[0004] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the existing automatic thread trimming device for double-needle machines often needs to process fabrics of different materials and thicknesses during use. Since the needle gauge of traditional double-needle machines is generally fixed, it cannot flexibly adapt to different sewing needs, thereby reducing production efficiency. Utility Model Content

[0005] The technical problem to be solved by the present invention is that in the prior art, the automatic thread trimming device for a double-needle machine has the disadvantage that the spacing between the double needles is generally fixed during use, resulting in the inability to adapt to different sewing needs. For this reason, we propose an automatic thread trimming device for a double-needle machine.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: an automatic thread trimming device for a double-needle machine, comprising a machine body, a lifting device is installed at the bottom of the machine body, a support seat is provided at the bottom of the lifting device, a pressure plate is fixed to the bottom of the support seat, and adjustment grooves are provided on both sides of the bottom of the machine body, an adjustment seat is slidably connected to the interior of the adjustment groove, a sewing needle is fixed to the bottom of the adjustment seat, and sliding rods are slidably connected to both sides of the interior of the adjustment seat, a circular plate is fixed to one end of the slide rod, a fixed plate is fixed to the other end of the slide rod, a card block is fixed to the top of the fixed plate, and a plurality of card slots for use with the card block are provided on both sides of the interior of the adjustment groove.

[0007] Preferably, a support rod is fixed inside the adjustment seat and extends to the outside of the adjustment seat, and guide grooves for use with the support rod are provided on both sides of the adjustment groove.

[0008] Preferably, a through groove is provided on the surface of the fixing plate, and the interior of the through groove is slidably connected to the support rod.

[0009] Preferably, a first spring is slidably connected to the surface of the support rod, and both ends of the first spring are fixed to the fixing plate.

[0010] Preferably, the diameter of the sliding rod outside the adjustment seat is larger than the diameter of the card block inserted into the card slot.

[0011] Preferably, a wire cutting groove is provided on both sides of the top of the pressure plate, a driving device is installed inside the pressure plate, a transmission plate is provided on both sides of the driving device, a wire cutting knife is slidably connected inside the transmission plate, and a buffer plate is slidably connected inside the wire cutting groove.

[0012] Preferably, a second spring is fixed to both ends of the interior of the pressure plate, and the other end of the second spring is fixed to the buffer plate.

[0013] The technical effects and advantages of this utility model are:

[0014] In the utility model, by pressing the circular plate, the sliding rod is driven to move into the adjusting seat, so that the fixed plate drives the card block to disengage from the inside of the card slot. At this time, the operator can adjust the position of the adjusting seat, and then adjust the distance between the two sewing needles, making the double-needle machine more flexible in the sewing process, adapting to fabrics of different thicknesses and materials, improving the applicability of the double-needle machine, and being simple and convenient to operate.

[0015] In the utility model, by starting the driving device, the output end of the driving device drives the transmission plate to drive the thread cutter to move in the direction of the buffer plate, thereby completing the thread cutting. At the same time, with the action of the second spring, after the thread cutter cuts the suture, the thread cutter is pushed to return to its original position, which is convenient for next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal split structure of the adjustment tank of the utility model;

[0018] Figure 3 This is an enlarged view of the structure at point A of the present utility model;

[0019] Figure 4 This is a schematic diagram of the pressing plate structure of the present utility model;

[0020] Figure 5 This is a schematic diagram of the internal structure of the pressing plate of the present utility model.

[0021] Legend: 1. Machine body; 2. Lifting device; 3. Support seat; 4. Pressing plate; 5. Adjusting slot; 6. Adjusting seat; 7. Sewing needle; 8. Sliding rod; 9. Round plate; 10. Fixing plate; 11. Block; 12. Slot; 13. Support rod; 14. Guide slot; 15. Through slot; 16. First spring; 17. Thread trimming slot; 18. Driving device; 19. Transmission plate; 20. Thread trimmer; 21. Buffer plate; 22. Second spring. DETAILED DESCRIPTION

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show components related to the present invention.

[0023] Reference Figure 1-Figure 5 As shown, the utility model provides a technical solution: an automatic thread trimming device for a double-needle machine, comprising a body 1, a lifting device 2 is installed at the bottom of the body 1, a support seat 3 is provided at the bottom of the lifting device 2, a pressing plate 4 is fixed to the bottom of the support seat 3, an adjusting groove 5 is provided on both sides of the bottom of the body 1, an adjusting seat 6 is slidably connected to the inside of the adjusting groove 5, a sewing needle 7 is fixed to the bottom of the adjusting seat 6, a sliding rod 8 is slidably connected to both sides of the inside of the adjusting seat 6, a circular plate 9 is fixed to one end of the sliding rod 8, and a fixed plate 9 is fixed to the other end of the sliding rod 8. Plate 10, a card block 11 is fixed on the top of the fixed plate 10, and multiple card slots 12 for use with the card block 11 are provided on both sides of the interior of the adjustment groove 5. By pressing the circular plate 9, the slide rod 8 is driven to move into the adjustment seat 6, so that the fixed plate 10 drives the card block 11 to disengage from the interior of the card slot 12. At this time, the operator can adjust the position of the adjustment seat 6, and then adjust the distance between the two sewing needles 7, making the double-needle machine more flexible in the sewing process, adapting to fabrics of different thicknesses and materials, improving the applicability of the double-needle machine, and simple and convenient operation.

[0024] Reference Figure 3 As shown, in this embodiment: a support rod 13 is fixed inside the adjusting seat 6 and extends to the outside of the adjusting seat 6, guide grooves 14 for cooperating with the support rod 13 are provided on both sides of the adjusting groove 5, and a through groove 15 is provided on the surface of the fixing plate 10, and the interior of the through groove 15 is slidably connected to the support rod 13. In the process of adjusting the sewing needle 7, the support rod 13 slides inside the guide groove 14, so that the adjusting seat 6 can be supported inside the adjusting groove 5, and the moving path can be planned at the same time, and the through groove 15 and the support rod 13 can limit the moving path of the fixing plate 10 to avoid tilting.

[0025] Reference Figure 3As shown, in this embodiment: the surface of the support rod 13 is slidably connected to the first spring 16, and both ends of the first spring 16 are fixed to the fixed plate 10. When the position of the sewing needle 7 needs to be adjusted, pressing the slide bar 8 can cause the fixed plate 10 to squeeze the first spring 16. When the position of the adjustment seat 6 needs to be fixed, the rebound force of the first spring 16 is used to push the fixed plate 10 to drive the card block 11 to be inserted into the interior of the card slot 12.

[0026] Reference Figure 3 As shown, in this embodiment: the diameter of the slide rod 8 located outside the adjustment seat 6 is larger than the diameter of the block 11 inserted into the slot 12. By designing the diameter of the slide rod 8 located outside the adjustment seat 6 to be larger than the diameter of the block 11 inserted into the slot 12, it can be ensured that when the adjustment seat 6 needs to be moved, the moving distance of the fixed plate 10 can make the block 11 disengage from the inside of the slot 12.

[0027] Reference Figure 4 and Figure 5 As shown, in this embodiment: a wire cutting groove 17 is provided on both sides of the top of the pressing plate 4, a driving device 18 is installed inside the pressing plate 4, and a transmission plate 19 is provided on both sides of the driving device 18. The interior of the transmission plate 19 is slidably connected to the wire cutting knife 20, and the interior of the wire cutting groove 17 is slidably connected to the buffer plate 21. A second spring 22 is fixed at both ends of the interior of the pressing plate 4, and the other end of the second spring 22 is fixed to the buffer plate 21. By starting the driving device 18, the output end of the driving device 18 is used to drive the transmission plate 19 to drive the wire cutting knife 20 to move toward the buffer plate 21 to complete the wire cutting. At the same time, with the force of the second spring 22, after the wire cutting knife 20 cuts the suture, the wire cutting knife 20 is pushed to return to its initial position for easy use next time.

[0028] The specific steps for using the automatic thread trimmer for the double-needle machine are as follows:

[0029] 1. When the distance between the two sewing needles 7 needs to be adjusted, the operator only needs to simply press the circular plate 9. This action will cleverly drive the slide bar 8 to move smoothly toward the inside of the adjustment seat 6. As the slide bar 8 moves, the fixed plate 10 connected to it will also move accordingly, thereby driving the card block 11 to gradually disengage from the inside of the card slot 12. At this time, the locking state is released, and the operator can freely adjust the position of the adjustment seat 6, that is, the relative position between the two sewing needles 7, thereby achieving precise adjustment of the distance between the two sewing needles 7.

[0030] 2. After the adjustment is completed, in order to ensure the stability of the adjustment and lock the new spacing, a first spring 16 is designed. It uses its own resilience to gently push the fixing plate 10 to move in the opposite direction. This action drives the card block 11 to be accurately inserted into the interior of the card slot 12 again, forming a firm locking structure, thereby ensuring that the two sewing needles 7 work stably at the new spacing.

[0031] 3. When it is necessary to cut the suture, the driving device 18 is started and the power generated by its output end is used to drive the transmission plate 19 to operate efficiently, thereby driving the thread cutter 20 to move smoothly along the preset trajectory toward the buffer plate 21. During this process, the precise cooperation between the thread cutter 20 and the buffer plate 21 ensures that the suture is cut cleanly and neatly, thereby completing the thread cutting action. At the same time, in order to improve the continuity and automation of the operation, a second spring 22 is specially designed. When the thread cutter 20 successfully cuts the suture, the second spring 22 will immediately take effect and push the thread cutter 20 to return to its original position quickly and smoothly by applying appropriate force. This design not only ensures the rapid completion of the thread cutting action, but also makes full preparations for the next use, so that the entire thread cutting process can be carried out efficiently and continuously, greatly improving work efficiency and operation convenience.

[0032] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic thread trimming device for a double-needle machine, comprising a machine body (1), characterized in that: A lifting device (2) is installed at the bottom of the body (1), a support seat (3) is provided at the bottom of the lifting device (2), a pressure plate (4) is fixed at the bottom of the support seat (3), an adjustment groove (5) is provided on both sides of the bottom of the body (1), an adjustment seat (6) is slidably connected inside the adjustment groove (5), a sewing needle (7) is fixed at the bottom of the adjustment seat (6), a sliding rod (8) is slidably connected on both sides of the inside of the adjustment seat (6), a circular plate (9) is fixed at one end of the sliding rod (8), a fixed plate (10) is fixed at the other end of the sliding rod (8), a clamping block (11) is fixed at the top of the fixed plate (10), and a plurality of clamping slots (12) used in conjunction with the clamping block (11) are provided on both sides of the inside of the adjustment groove (5).

2. The automatic thread trimming device for a double-needle machine according to claim 1, characterized in that: A support rod (13) is fixed inside the adjustment seat (6) and extends to the outside of the adjustment seat (6). Guide grooves (14) for use with the support rod (13) are provided on both sides of the adjustment groove (5).

3. The automatic thread trimming device for a double-needle machine according to claim 1, characterized in that: A through slot (15) is provided on the surface of the fixing plate (10), and the interior of the through slot (15) is slidably connected to the support rod (13).

4. The automatic thread trimming device for a double-needle machine according to claim 2, characterized in that: The surface of the support rod (13) is slidably connected to a first spring (16), and both ends of the first spring (16) are fixed to the fixing plate (10).

5. The automatic thread trimming device for a double-needle machine according to claim 1, characterized in that: The diameter of the slide bar (8) outside the adjustment seat (6) is larger than the diameter of the clamping block (11) inserted into the clamping slot (12).

6. The automatic thread trimming device for a double-needle machine according to claim 1, characterized in that: Both sides of the top of the pressing plate (4) are provided with a wire cutting groove (17), a driving device (18) is installed inside the pressing plate (4), and a transmission plate (19) is provided on both sides of the driving device (18), the transmission plate (19) is internally connected to a wire cutting knife (20) in a sliding manner, and the wire cutting groove (17) is internally connected to a buffer plate (21) in a sliding manner.

7. The automatic thread trimming device for a double-needle machine according to claim 1, characterized in that: Second springs (22) are fixed at both ends inside the pressure plate (4), and the other end of the second spring (22) is fixed to the buffer plate (21).

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