A sewing machine overlock device for water-cut bag production

Abstract

The utility model discloses a sewing machine overlock device for water cutting bag production. It includes: water cutting bag transmission platform, the water cutting bag transmission platform is fixed with sewing machine seat on, the lifting plate is set up in the sewing machine seat, the sewing needle clamping seat is fixed on the bottom surface of lifting plate, the bottom of sewing needle clamping seat is equipped with recess, the inner bottom surface of recess is equipped with needle tail limiting slot, the inside of recess is movably connected with sewing needle clamp, and sewing needle clamp is symmetrically set up in both sides of needle tail limiting slot, the sewing needle is set up in the inside of recess and is clamped and fixed by both sides sewing needle clamp, and the needle tail of sewing needle is placed in needle tail limiting slot, the clamp drive mechanism is set up on sewing needle clamping seat and is connected with sewing needle clamp, and both sides sewing needle clamp is synchronous to draw close or away from needle tail limiting slot under the control of clamp drive mechanism. The utility model has the beneficial effects of: can change different thickness sewing needle flexibly.

Description

Technical Field

[0001] This utility model relates to the technical field of water-cut bag manufacturing, and in particular to an overlock device for a sewing machine used in the production of water-cut bags. Background Technology

[0002] A water-cutting bag is a small filter bag that is usually installed at the drain outlet of a kitchen sink, basin, or bathroom floor drain. Its core function is to separate water from waste by physically intercepting solid waste such as food scraps and hair, thereby preventing pipe blockage.

[0003] Chinese Patent Publication No. CN113969468B, published on June 16, 2023, discloses a water-cutting bag cutting and sewing device. It includes a frame, a control cabinet, a shaping device, a cutting device, and a sewing device. A conveying device is mounted on the frame, transporting materials from one end to the other. The shaping device, cutting device, and sewing device are sequentially distributed along the conveying direction of the conveying device. All three devices are detachably connected to the bottom of the frame and electrically connected to the control cabinet. The main drawback is that the sewing device is only compatible with a single type of needle, lacking flexibility and adaptability to multiple specifications, making it difficult to switch between different needle thicknesses according to the sewing requirements of different types of water-cutting bags.

[0004] In summary, there is a current need for an overlock device for water-cutting bags that can flexibly change sewing needles of different thicknesses. Utility Model Content

[0005] The present invention aims to overcome the shortcomings of the prior art by providing a sewing machine overlock device for water-cutting bag production that can flexibly replace sewing needles of different thicknesses.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An overlock sewing machine device for producing water-cut bags includes: A water-cutting bag conveying platform, on which a sewing machine base is fixed; A lifting plate, which is disposed on the sewing machine base and is movably connected to it vertically; A sewing needle holder is fixed to the bottom surface of the lifting plate. The bottom of the sewing needle holder is provided with a groove, and the inner bottom surface of the groove is provided with a needle tail limiting groove. A sewing needle clamp is movably connected inside the groove, and the sewing needle clamp is symmetrically arranged on both sides of the needle tail limiting groove. A sewing needle is disposed inside the groove and held and fixed by sewing needle clamps on both sides. The tail of the sewing needle is placed in the tail limiting groove, and the tip of the sewing needle is located outside the groove. The sewing needle and the sewing needle clamp are detachably connected. A clamp driving mechanism is provided on the sewing needle holder and connected to the sewing needle clamp. Under the control of the clamp driving mechanism, the sewing needle clamps on both sides synchronously move closer to or further away from the needle tail limiting groove. A water-cutting bag pressure plate is provided on the lifting plate and located below the sewing needle. The water-cutting bag pressure plate is provided with a first clearance hole that matches the sewing needle, and the water-cutting bag conveying platform is provided with a second clearance hole that matches the sewing needle.

[0007] During operation, the water-cutting bag is transported via the water-cutting bag transfer platform. A lifting plate moves the sewing needle holder and the sewing needle, clamped by the sewing needle clamps on both sides (synchronously approaching and clamping the sewing needle under the control of the clamp drive mechanism) and limited by the needle tail limiting groove, up and down. This, combined with the water-cutting bag pressure plate (which avoids the sewing needle through the first clearance hole), presses and positions the water-cutting bag, assisting the sewing needle in overlocking the bag. The design of the sewing needle clamps on both sides simultaneously approaching the sewing needle provides symmetrical and balanced clamping force for sewing needles of different thicknesses, achieving stable adaptation to various needle specifications. Furthermore, it ensures that the sewing needle always precisely conforms to the needle tail limiting groove, guaranteeing consistent and accurate needle tip positioning and avoiding problems such as skewing stitches and misaligned needle holes caused by clamping deviation. This balances the flexibility of needle type adaptation with the precision of the overlocking operation.

[0008] Preferably, the needle tail limiting groove is conical in shape, with a magnetic block fixed on the inner bottom surface of the groove, and the needle tail limiting groove located on the magnetic block. The conical needle tail limiting groove can provide precise guidance and centering for the needle tail, ensuring the coaxiality and consistency of sewing needles of different thicknesses during installation, effectively preventing skewing of the stitches and misalignment of the needle holes during overlocking. The magnetic attraction of the magnetic block allows the sewing needle to be temporarily fixed in the conical needle tail limiting groove without manual support when placing it, keeping the sewing needle in a stable position. This provides a reliable basis for the simultaneous approach and precise clamping of the sewing needle clamps on both sides, simplifying the installation process and avoiding clamping misalignment caused by manual support, thus balancing the accuracy of overlocking operations with the convenience of placement.

[0009] Preferably, the sewing needle clamp includes piston columns symmetrically arranged on both sides of the needle tail limiting groove. The inner wall of the groove has a column channel matching the piston columns. One end of the piston column is placed within the column channel and slidably sealed to it. The other end of the piston column is located inside the groove and a base rod is fixed thereon. The axis of the base rod and the groove are parallel to each other. Several V-shaped clamping blocks are fixed on the base rod. The V-shaped clamping blocks on two base rods are arranged opposite each other and staggered. The sewing needle is clamped and fixed by the V-shaped clamping blocks on both sides. The clamping drive mechanism drives the piston columns on both sides to extend synchronously along the column channel, causing the base rod parallel to the groove axis and the staggered V-shaped clamping blocks to move closer together, symmetrically clamping and fixing the sewing needle placed at the needle tail limiting groove. The V-shaped clamping blocks can automatically center and adapt to sewing needles of different thicknesses. The staggered distribution design increases the contact area and avoids force concentration. Combined with the sealing guide of the piston columns and the parallel arrangement of the base rods, it balances clamping adaptability, stability, and positioning accuracy.

[0010] Preferably, a sealing ring is fitted onto the piston rod, and the sealing ring is located at one end of the piston rod. The sealing ring on the piston rod can enhance the sealing performance between the piston rod and the rod body channel, prevent gas leakage when the pneumatic motor unit is supplied with air, and ensure the pressure stability and response sensitivity of the pneumatic drive.

[0011] Preferably, one end of the column channel is connected to the piston column, and the other end of the column channel is provided with an air pipe nozzle. The clamping drive mechanism includes a pneumatic pipe, and a pneumatic motor assembly is provided on the sewing machine base. The pneumatic motor assembly and the air pipe nozzle are connected through the pneumatic pipe. The pneumatic motor assembly supplies or evacuates air to the air pipe nozzle of the column channel through the pneumatic pipe, driving the piston columns on both sides to extend or retract synchronously along the column channel. This causes the base rod and the staggered V-shaped clamps to move closer or further apart, symmetrically clamping or releasing the sewing needle placed at the needle tail limiting groove, which is convenient to control. The pneumatic motor assembly can be a combination of a miniature air compressor and an electromagnetic reversing valve. This is a mature existing technology in the field, and its specific structure, working principle, and pipeline connection method are common knowledge and will not be described in detail here.

[0012] Preferably, a plurality of limiting tubes are fixed on the bottom surface of the lifting plate, and a limiting guide post matching the limiting tubes is fixed on the water-cutting bag pressing plate. The limiting guide post is placed inside the limiting tube and is movably connected to it. A spring is installed inside the limiting tube, one end of which is connected to the bottom surface of the lifting plate, and the other end of which is connected to the limiting guide post. When the lifting plate moves up and down, the limiting guide post slides synchronously along the limiting tube, and the spring extends and retracts with the lifting action, so that the water-cutting bag pressing plate can press down the water-cutting bag before each stitch, improving the overlock stability.

[0013] The beneficial effects of this utility model are: it can form a symmetrical and balanced clamping force for sewing needles of different thicknesses, achieving stable adaptation to sewing needles of various specifications; it ensures the consistency and accuracy of needle tip positioning, avoiding problems such as skewing of overlock stitches and misalignment of needle holes caused by clamping deviation, balancing the flexibility of needle type adaptation and the accuracy of overlocking operations; it ensures the coaxiality and consistency of the installation of sewing needles of different thicknesses, effectively avoiding skewing of stitches and misalignment of needle holes during overlocking; it avoids clamping misalignment caused by manual support deviation, balancing the accuracy of overlocking operations and the convenience of placement; and it improves the stability of overlocking. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Schematic diagram of the internal structure of the sewing needle holder; Figure 3 This is a top view of the sewing needle holder.

[0015] In the diagram: 1. Water-cutting bag transfer platform, 2. Sewing machine base, 3. Lifting plate, 4. Sewing needle holder, 5. Groove, 6. Needle tail limiting groove, 7. Sewing needle, 8. Water-cutting bag pressure plate, 9. First clearance hole, 10. Second clearance hole, 11. Magnetic block, 12. Piston column, 13. Column channel, 14. Base rod, 15. V-shaped clamp, 16. Sealing ring, 17. Air pipe nozzle, 18. Pneumatic pipe, 19. Limiting tube, 20. Limiting guide post, 21. Spring. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] like Figures 1-3 In the embodiments described above, a sewing machine overlock device for producing water-cut bags includes: Water-cutting bag conveying platform 1, with a sewing machine base 2 fixed on the water-cutting bag conveying platform 1; The lifting plate 3 is mounted on the sewing machine base 2 and is movably connected to it. The lifting drive method of the lifting plate 3 adopts existing mature technologies in this field (such as cylinder drive, cam linkage mechanism or motor screw drive, etc.). Its specific drive structure, power transmission principle and control logic are common knowledge and will not be described in detail here.

[0018] Sewing needle holder 4 is fixed on the bottom surface of lifting plate 3. The bottom of sewing needle holder 4 is provided with groove 5. The inner bottom surface of groove 5 is provided with needle tail limiting groove 6. Sewing needle clamp is movably connected inside groove 5. Sewing needle clamp is symmetrically arranged on both sides of needle tail limiting groove 6. The sewing needle 7 is located inside the groove 5 and is held and fixed by the sewing needle clamps on both sides. The tail of the sewing needle 7 is placed in the tail limiting groove 6, and the tip of the sewing needle 7 is located outside the groove 5. The sewing needle 7 and the sewing needle clamp 4 are detachably connected. The clamping drive mechanism is set on the sewing needle holder 4 and connected to the sewing needle clamp. Under the control of the clamping drive mechanism, the sewing needle clamps on both sides move closer to or further away from the needle tail limiting groove 6. The water-cutting bag pressure plate 8 is set on the lifting plate 3 and located below the sewing needle 7. The water-cutting bag pressure plate 8 is provided with a first clearance hole 9 that matches the sewing needle 7, and the water-cutting bag transmission platform 1 is provided with a second clearance hole 10 that matches the sewing needle 7.

[0019] The needle tail limiting groove 6 is conical in shape, and a magnetic block 11 is fixed on the inner bottom surface of the groove 5. The needle tail limiting groove 6 is located on the magnetic block 11.

[0020] The sewing needle clamp includes piston columns 12 symmetrically arranged on both sides of the needle tail limiting groove 6. The inner wall of the groove 5 is provided with a column channel 13 that matches the piston column 12. One end of the piston column 12 is placed in the column channel 13 and is slidably sealed to it. The other end of the piston column 12 is located inside the groove 5 and a base rod 14 is fixed thereon. The axis of the base rod 14 and the groove 5 are parallel to each other. Several V-shaped clamping blocks 15 are fixed on the base rod 14. The V-shaped clamping blocks 15 on the two base rods 14 are arranged opposite to each other and staggered. The sewing needle 7 is clamped and fixed by the V-shaped clamping blocks 15 on both sides.

[0021] A sealing ring 16 is fitted onto the piston rod 12, and the sealing ring 16 is located at one end of the piston rod 12.

[0022] One end of the column channel 13 is connected to the piston column 12, and the other end of the column channel 13 is provided with an air pipe nozzle 17. The clamp drive mechanism includes a pneumatic pipe 18. A pneumatic motor assembly is provided on the sewing machine base 2, and the pneumatic motor assembly and the air pipe nozzle 17 are connected through the pneumatic pipe 18. The pneumatic motor assembly can be a combination of a miniature air compressor and an electromagnetic reversing valve. This is a mature existing technology in the field, and its specific structure, working principle, and pipeline connection method are common knowledge and will not be described in detail here.

[0023] Several limiting tubes 19 are fixed on the bottom surface of the lifting plate 3. A limiting guide post 20 matching the limiting tube 19 is fixed on the water-cutting bag pressure plate 8. The limiting guide post 20 is placed inside the limiting tube 19 and is movably connected to it. A spring 21 is provided inside the limiting tube 19. One end of the spring 21 is connected to the bottom surface of the lifting plate 3, and the other end of the spring 21 is connected to the limiting guide post 20.

[0024] During operation, the water-cutting bag is transported through the water-cutting bag transport platform 1 (the transport principle of the water-cutting bag has been disclosed in the patent of the background technology and belongs to the prior art, so it will not be described again). The lifting plate 3 drives the sewing needle holder 4 and the sewing needle 7, which is clamped by the sewing needle clamps on both sides (synchronously approaching the sewing needle under the control of the clamp drive mechanism) and limited by the needle tail limiting groove 6, to move up and down. In conjunction with the water-cutting bag pressure plate 8 (which avoids the sewing needle 7 through the first avoidance hole 9), the water-cutting bag is pressed and positioned to assist the sewing needle 7 in performing overlocking operations on the water-cutting bag.

[0025] When installing the sewing needle 7, pick up the sewing needle 7 to be installed and align its needle tail with the conical needle tail limiting groove 6 on the magnetic block in the groove 5. With the adsorption of the magnetic block 11, the sewing needle 7 (made of magnetic material) is temporarily fixed in the groove, maintaining a stable posture without manual support. Then, start the pneumatic unit and supply air to the column channel 13 through the pneumatic tube 18. Drive the piston column 12 with sealing rings 16 on both sides to extend synchronously along the column channel 13. This drives the base rod 14 parallel to the center line of the groove and the staggered V-shaped clamping blocks 15 to move closer synchronously. The V-shaped clamping blocks 15 on both sides automatically center and fit against the side wall of the sewing needle 7 to form a symmetrical and balanced clamping force. At the same time, under the centering action of the conical needle tail limiting groove 6, the sewing needle 7 is ensured to be coaxial with the center line of the groove, and the precise installation of the sewing needle 7 is finally completed.

Claims

1. An overlock sewing machine device for producing water-cut bags, characterized in that, include: A water-cutting bag transport platform (1) is provided, on which a sewing machine base (2) is fixed. Lifting plate (3), the lifting plate (3) is disposed on the sewing machine base (2) and is movably connected to it in the upper and lower parts; A sewing needle holder (4) is fixed on the bottom surface of the lifting plate (3). The bottom of the sewing needle holder (4) is provided with a groove (5). The inner bottom surface of the groove (5) is provided with a needle tail limiting groove (6). A sewing needle clamp is movably connected inside the groove (5). The sewing needle clamp is symmetrically arranged on both sides of the needle tail limiting groove (6). A sewing needle (7) is located inside the groove (5) and is held and fixed by sewing needle clamps on both sides. The tail of the sewing needle (7) is placed in the tail limiting groove (6), and the tip of the sewing needle (7) is located outside the groove (5). The sewing needle (7) and the sewing needle clamp (4) are detachably connected. The clamp driving mechanism is disposed on the sewing needle holder (4) and connected to the sewing needle clamp. The sewing needle clamps on both sides move closer to or further away from the needle tail limiting groove (6) under the control of the clamp driving mechanism. Water-cutting bag pressure plate (8), the water-cutting bag pressure plate (8) is set on the lifting plate (3) and located below the sewing needle (7), the water-cutting bag pressure plate (8) is provided with a first clearance hole (9) matching the sewing needle (7), and the water-cutting bag transmission platform (1) is provided with a second clearance hole (10) matching the sewing needle (7).

2. The overlock device for a sewing machine used in the production of water-cut bags according to claim 1, characterized in that, The needle tail limiting groove (6) is conical in shape, and a magnetic block (11) is fixed on the inner bottom surface of the groove (5). The needle tail limiting groove (6) is located on the magnetic block (11).

3. The overlock device for a sewing machine used in the production of water-cut bags according to claim 1, characterized in that, The sewing needle clamp includes piston columns (12) symmetrically arranged on both sides of the needle tail limiting groove (6). The inner wall of the groove (5) is provided with a column channel (13) that matches the piston column (12). One end of the piston column (12) is placed in the column channel (13) and is slidably sealed to it. The other end of the piston column (12) is located inside the groove (5) and a base rod (14) is fixed thereon. The axis of the base rod (14) and the groove (5) are parallel to each other. Several V-shaped clamping blocks (15) are fixed on the base rod (14). The V-shaped clamping blocks (15) on the two base rods (14) are arranged opposite to each other and staggered. The sewing needle (7) is clamped and fixed by the V-shaped clamping blocks (15) on both sides.

4. The overlock device for a sewing machine used in the production of water-cut bags according to claim 3, characterized in that, A sealing ring (16) is fitted onto the piston rod (12), and the sealing ring (16) is located at one end of the piston rod (12).

5. The overlock device for a sewing machine used in the production of water-cut bags according to claim 3, characterized in that, One end of the column channel (13) is connected to the piston column (12), and the other end of the column channel (13) is provided with an air pipe nozzle (17). The clamp driving mechanism includes a pneumatic pipe (18). A pneumatic motor assembly is provided on the sewing machine base (2). The pneumatic motor assembly and the air pipe nozzle (17) are connected through the pneumatic pipe (18).

6. A sewing machine overlock device for producing water-cut bags according to any one of claims 1-5, characterized in that, A number of limiting tubes (19) are fixed on the bottom surface of the lifting plate (3). A limiting guide post (20) matching the limiting tube (19) is fixed on the water-cutting bag pressure plate (8). The limiting guide post (20) is placed inside the limiting tube (19) and is connected to it vertically. A spring (21) is provided inside the limiting tube (19). One end of the spring (21) is connected to the bottom surface of the lifting plate (3), and the other end of the spring (21) is connected to the limiting guide post (20).

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