Four-thread overlock sewing machine

Abstract

The utility model discloses a four-thread overlock sewing machine which comprises an overlock sewing machine body, a workbench is installed on the side face of the overlock sewing machine body, a moving groove is formed in the upper portion of the workbench, a limiting block is installed in the moving groove in a sliding mode, and a pressing block is movably installed on the upper portion of the limiting block. A fixing block is installed on one side, located on the side face of the limiting block, of the workbench in a bolting mode, a third sliding groove is formed in the fixing block, a motor is installed on the upper portion of the fixing block, the output end of the motor penetrates through the middle of the fixing block to be provided with a lead screw, and a third sliding block is installed in the position, located in the third sliding groove, of the middle of the lead screw; and a rotating shaft is installed on the portion, located on the upper portion of the workbench, of the side face of the third sliding block, and a grinding roller is rotationally installed outside the rotating shaft. According to the device, through cooperation of a limiting piece and an extrusion piece, materials can be kept flat before edge locking, the materials are prevented from being curled during edge locking, the edge locking quality of the materials is guaranteed, and the practicability of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of overlock machines, in particular to a four-thread overlock machine. Background Art

[0002] An overlock machine, also known as an overlock sewing machine, edge sewing machine, ring sewing machine, edge stitching machine, or boning machine, is a piece of industrial equipment used for sewing and hemming. It typically comes in three-, four-, or five-thread types. Its primary function is to prevent fuzzing on garment seams and it is widely used in the garment manufacturing industry. Overlock machines are not only used for hemming, but can also sew fabrics such as T-shirts, sportswear, and underwear, and are particularly suitable for stretch fabrics.

[0003] Sofa overlocking machines enhance the durability of sofas through a unique sewing process. Traditional sofa edges are often loose and prone to breakage or unraveling. However, overlocking creates stronger, more resistant edges that can withstand external forces, extending the lifespan of the sofa. Overlocking not only creates a neat and aesthetically pleasing appearance, but also creates a more comfortable, textured feel. This treatment enhances the overall aesthetics of a sofa, giving it a more upscale and refined look.

[0004] According to the authorization announcement number CN 209194151 U, a four-thread overlock machine is disclosed, the key points of its technical solution are that it includes a workbench, an overlock machine is provided on the workbench, a cotton thread placement rack is provided on the workbench, a sub-bracket is fixedly connected to the cotton thread placement rack, a bottom plate is fixedly connected to the upper end of the bottom plate, a center column is fixedly connected to the outer side of the center column, a clamping ring is rotatably connected to the inner ring, the clamping ring includes an inner ring close to the center column and an outer ring movably connected to the inner ring, the inner ring and the outer ring are connected by a first spring, one end of the first spring is fixedly connected to the outer side wall of the inner ring, and the other end is fixedly connected to the inner side wall of the outer ring, and the upper end of the outer ring is fixedly connected to a guide plate; this four-thread overlock machine changes the structure of the cotton thread bobbin placement rack so that the inner ring of the cotton thread bobbin fits with the placement rack, so that the cotton thread bobbin can be released smoothly and the cotton thread will not be stuck with the cotton thread placement rack, so that the cotton thread can be transmitted more smoothly.

[0005] The sofa fabric has a large elasticity and is prone to curling at the edges during the lock-edge process, which may cause the lock-edge machine to be uneven during the lock-edge process, affecting the quality of the sofa lock-edge. Therefore, a new four-thread lock-edge machine is now needed. Utility Model Content

[0006] The purpose of the utility model is to provide a four-thread overlocking machine, which limits and squeezes the fabric by means of an adjustable limiting component to ensure that the sofa will not curl before overlocking, so as to solve the technical problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A four-thread overlocking machine comprises an overlocking machine body, a workbench is mounted on the side of the overlocking machine body, a movable groove is provided on the upper portion of the workbench, a limit block is slidably mounted inside the movable groove, and a pressure block is movably mounted on the upper portion of the limit block;

[0009] A fixed block is bolted to one side of the workbench and is installed on the side of the limit block. A third slide groove is provided inside the fixed block. A motor is installed on the upper part of the fixed block. The output end of the motor passes through the middle part of the fixed block and is installed with a screw rod. The middle part of the screw rod is located in the third slide groove and is installed with a third slider. The side of the third slider is located on the upper part of the workbench and is installed with a rotating shaft. A rolling roller is rotatably installed on the outside of the rotating shaft.

[0010] Preferably, a first sliding groove is opened inside the workbench at the lower part of the movable groove, a first sliding block is slidably installed inside the first sliding groove, and the bottom of the limit block is connected to the upper part of the first sliding block.

[0011] Preferably, a first screw rod is installed through the side surface of the workbench, and the first sliding block is installed through the middle of the first screw rod.

[0012] Preferably, a second sliding groove is provided on the side surface of the limiting block, a second sliding block is slidably installed inside the second sliding groove, and the pressure plate is connected to the side surface of the second sliding block.

[0013] Preferably, a second screw rod is installed through the upper portion of the limiting block, and the second sliding block is installed through the middle portion of the second screw rod.

[0014] Preferably, several groups of connecting seats are rotatably mounted on the upper part of the overlocking machine body, a center column is clamped and mounted on the upper part of each group of connecting seats, and several groups of connecting rods are mounted on the outer part of the center column on the upper part of each group of connecting seats.

[0015] Preferably, a mounting groove is provided inside each group of the connecting seats at the bottom of the center column, and a connecting block is installed inside the corresponding mounting groove at the bottom of each group of the center column.

[0016] Preferably, an annular groove is formed inside the outer arc surface of the installation groove in each group of the connecting seats, and two groups of clamping blocks are installed inside the outer arc surface of each group of the connecting blocks corresponding to the annular groove.

[0017] Preferably, a material guide surface is provided on the upper part of the overlocking machine body on the side of the workbench, a support frame is installed on the lower part of the overlocking machine body, and a discharge port is provided on the upper part of the support frame corresponding to the material guide surface.

[0018] Preferably, a storage box is installed at the lower part of the support frame corresponding to the discharge port, a pull-out box is slidably installed inside the storage box, and the discharge port is arranged at the upper part of the pull-out box.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] By turning the first screw, the first slider will slide inside the first slide groove, causing the limit block to move on the workbench to ensure that the edge of the fabric can fit into the overlock machine. By turning the second screw, the limit block will move up and down to extrude the material to be overlocked. At the same time, the motor will be started to drive the rolling roller to fit the surface of the material for rolling and extrusion to prevent curling at the edge of the material. This device cooperates with the limiter and the extrusion part to keep the material flat before overlocking, avoid curling, ensure the quality of the material overlocking, and increase the practicality of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the overlock machine of the utility model;

[0023] Figure 3 This is a schematic diagram of the upper structure of the workbench of the utility model;

[0024] Figure 4 For this utility model Figure 3 A schematic diagram of the structure at point A;

[0025] Figure 5 This is a schematic diagram of the internal structure of the fixed block of the utility model;

[0026] Figure 6 This is a schematic diagram of the disassembled upper structure of the connecting seat of the utility model.

[0027] In the figure: 1. Overlock machine body; 2. Workbench; 3. First slide; 4. First slider; 5. Limit block; 6. First screw; 7. Second slide; 8. Second slider; 9. Pressing plate; 10. Second screw; 11. Fixed block; 12. Third slide; 13. Motor; 14. Screw; 15. Third slider; 16. Rotating shaft; 17. Rolling roller; 18. Connecting seat; 19. Center column; 20. Connecting rod; 21. Connecting block; 22. Clamping block; 23. Material guide surface; 24. Discharge port; 25. Storage box; 26. Pull-out box. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1 and Figure 6 The utility model provides a four-thread overlocking machine, comprising an overlocking machine body 1, a workbench 2 is installed on the side of the overlocking machine body 1, a movable groove is opened on the upper part of the workbench 2, a limit block 5 is slidably installed inside the movable groove, and a pressure block 9 is movably installed on the upper part of the limit block 5;

[0030] On one side of the workbench 2, a fixed block 11 is bolted to the side of the limit block 5, and a third slide groove 12 is opened inside the fixed block 11. A motor 13 is installed on the upper part of the fixed block 11. The output end of the motor 13 passes through the middle of the fixed block 11 and is installed with a screw rod 14. The middle of the screw rod 14 is located inside the third slide groove 12 and is installed with a third slider 15. The side of the third slider 15 is located on the upper part of the workbench 2 and is installed with a rotating shaft 16. The outside of the rotating shaft 16 is rotatably installed with a rolling roller 17.

[0031] In this embodiment, if Figure 4 As shown, a first slide groove 3 is provided inside the workbench 2 at the lower part of the movable groove, and a first slider 4 is slidably installed inside the first slide groove 3. The bottom of the limit block 5 is connected to the upper part of the first slider 4. The first slide groove 3 is used for slidingly installing the first slider 4. The first slider 4 slides inside the first slide groove 3, thereby driving the limit block 5 to move on the workbench 2. The limit block 5 can limit the edge of the material, which is convenient for the operator to align the material and facilitate the subsequent locking of the material, thereby increasing the practicality of the device.

[0032] Preferably, Figure 4 As shown, a first screw rod 6 is installed through the side of the workbench 2, and a first slider 4 is installed through the middle of the first screw rod 6. The first screw rod 6 is used to drive the first slider 4 to move. By rotating the first screw rod 6, the first screw rod 6 drives the first slider 4 to move inside the first slide groove 3, thereby driving the limit block 5 to move on the workbench 2, making it easier for the operator to organize the materials.

[0033] Further, such as Figure 4As shown, a second slide groove 7 is provided on the side of the limit block 5, and a second slider 8 is slidably installed inside the second slide groove 7. The pressure plate 9 is connected to the side of the second slider 8. The second slide groove 7 on the side of the limit block 5 is used for slidingly installing the second slider 8. Through the cooperation of the second slider 8 and the second slide groove 7, the pressure plate 9 can move up and down on the side of the limit block 5 to squeeze the material after sorting at the bottom to prevent curling at the edge of the material.

[0034] In a further preferred embodiment, Figure 4 As shown, a second screw 10 is installed through the upper part of the limit block 5, and a second slider 8 is installed through the middle part of the second screw 10. The second screw 10 is used to drive the second slider 8 to move. The second slider 8 moves inside the second slide 12, and the pressure plate 9 connected to the second slider 8 will squeeze the material inside the limit block 5. When the edge locking machine body 1 is working, it will start to reverse the curling of the material edge, thereby ensuring the quality of the material edge locking and increasing the practicality of the device.

[0035] It is worth noting that if Figure 6 As shown, several groups of connecting seats 18 are rotatably installed on the upper part of the overlocking machine body 1, and a center column 19 is clamped and installed on the upper part of each group of connecting seats 18. Several groups of connecting rods 20 are installed on the outside of the center column 19 on the upper part of each group of connecting seats 18. The connecting seats 18 are used to connect the center column 19 and the connecting rod 20, so that the center column 19 and the connecting rod 20 are rotatably installed on the upper part of the overlocking machine body 1. The center column 19 and the connecting rod 20 are used to fix the overlocking line to prevent the overlocking line from being entangled.

[0036] In a further preferred embodiment, Figure 6 As shown, an installation groove is opened at the bottom of the center column 19 inside each group of connecting seats 18, and a connecting block 21 is installed inside the corresponding installation groove at the bottom of each group of center columns 19. The installation groove inside the connecting seat 18 is used to install the connecting block 21, so that the center column 19 can be snapped into the inside of the connecting seat 18.

[0037] In addition, if Figure 6 As shown, an annular groove is provided inside each group of connecting seats 18 on the outer arc surface of the mounting groove, and two groups of clamping blocks 22 are installed inside the annular groove corresponding to the outer arc surface of each group of connecting blocks 21. The annular groove on the outer arc surface of the mounting groove is used to clamp the clamping block 22, so that the connecting block 21 and its upper middle column 19 are clamped on the upper part of the connecting seat 18. When the locking line on the middle column 19 is used up, the middle column 19 can be rotated to remove it for replacement, which is convenient for replacing the locking line and ensures the efficiency of locking.

[0038] Further, such as Figure 1As shown, the upper part of the overlocking machine body 1 is located on the side of the workbench 2 and is provided with a material guide surface 23, and the lower part of the overlocking machine body 1 is installed with a support frame, and the upper part of the support frame is provided with a discharge port 24 corresponding to the material guide surface 23. The waste generated during the overlocking process will pass through the material guide surface 23 into the discharge port 24, and then be stored in the storage box 25 to ensure the cleanliness of the surface of the workbench 2.

[0039] It is worth noting that if Figure 1 As shown, a storage box 25 is installed at the lower part of the support frame corresponding to the discharge port 24, and a pull-out box 26 is slidably installed inside the storage box 25. The discharge port 24 is set at the upper part of the pull-out box 26. The waste enters the storage box 25 through the discharge port 2 and then enters the pull-out box 26. When the pull-out box 26 is full, it can be pulled out for unloading. Through the cooperation of the storage box 25 and the pull-out box 26, the cleanliness of the entire locking process is guaranteed, and the practicality of the entire device is increased.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A four-thread overlocking machine, comprising an overlocking machine body (1), characterized in that: A workbench (2) is installed on the side of the overlock machine body (1), a movable groove is provided on the upper portion of the workbench (2), a limit block (5) is slidably installed inside the movable groove, and a pressure plate (9) is movably installed on the upper portion of the limit block (5); A fixed block (11) is bolted to one side of the workbench (2) and is installed on the side of the limit block (5). A third sliding groove (12) is provided inside the fixed block (11). A motor (13) is installed on the upper part of the fixed block (11). The output end of the motor (13) passes through the middle of the fixed block (11) and is installed with a screw rod (14). The middle of the screw rod (14) is located inside the third sliding groove (12) and is installed with a third slider (15). The side of the third slider (15) is located on the upper part of the workbench (2) and is installed with a rotating shaft (16). A rolling roller (17) is rotatably installed on the outside of the rotating shaft (16).

2. The four-thread overlock machine according to claim 1, characterized in that: A first sliding groove (3) is provided in the lower part of the movable groove inside the workbench (2), a first slider (4) is slidably installed inside the first sliding groove (3), and the bottom of the limit block (5) is connected to the upper part of the first slider (4).

3. The four-thread overlock machine according to claim 2, characterized in that: A first screw rod (6) is installed through the side surface of the workbench (2), and the first sliding block (4) is installed through the middle of the first screw rod (6).

4. The four-thread overlock machine according to claim 3, characterized in that: A second sliding groove (7) is provided on the side of the limit block (5), a second sliding block (8) is slidably installed inside the second sliding groove (7), and the pressing plate (9) is connected to the side of the second sliding block (8).

5. The four-thread overlock machine according to claim 4, characterized in that: A second screw rod (10) is installed through the upper portion of the limit block (5), and the second sliding block (8) is installed through the middle portion of the second screw rod (10).

6. The four-thread overlock machine according to claim 5, characterized in that: The upper part of the overlocking machine body (1) is rotatably mounted with a plurality of connecting seats (18), the upper part of each group of connecting seats (18) is clamped with a center column (19), and the upper part of each group of connecting seats (18) is located outside the center column (19) and is mounted with a plurality of connecting rods (20).

7. The four-thread overlock machine according to claim 6, characterized in that: Each group of the connecting seats (18) is provided with a mounting groove at the bottom of the center column (19), and each group of the center column (19) is provided with a connecting block (21) at the bottom of the corresponding mounting groove.

8. The four-thread overlock machine according to claim 7, characterized in that: An annular groove is provided inside each group of the connecting seats (18) on the outer arc surface of the installation groove, and two groups of clamping blocks (22) are installed inside the outer arc surface of each group of the connecting blocks (21) corresponding to the annular groove.

9. The four-thread overlock machine according to claim 8, characterized in that: The upper part of the edge-locking machine body (1) is located on the side of the workbench (2) and is provided with a material guide surface (23); the lower part of the edge-locking machine body (1) is installed with a support frame; the upper part of the support frame is provided with a discharge port (24) corresponding to the material guide surface (23).

10. The four-thread overlock machine according to claim 9, characterized in that: A storage box (25) is installed at the lower part of the support frame corresponding to the discharge port (24), a drawer box (26) is slidably installed inside the storage box (25), and the discharge port (24) is arranged at the upper part of the drawer box (26).

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