An adjustable overlock machine

Abstract

The utility model relates to an adjustable overedger, including overedger body, the upper surface of overedger body is provided with the incoming line part, the left side of overedger body is provided with overedging part, the back of overedger body is fixedly connected with the placing rack, the top of placing rack is fixedly connected with the wire hanger, the upper surface of placing rack is fixedly connected with a plurality of height greater than or equal to the placing cylinder of wire cylinder standard height in straight line array, the inside of placing cylinder is provided with the inner clamping plate of radial movement and the adjusting device of drive inner clamping plate radial movement, and the operating part of adjusting device exposes to the top of placing cylinder outside. The placing cylinder set up on the placing rack is used to place the wire cylinder, and the inner clamping plate and the adjusting device are arranged in the placing cylinder, the inner clamping plate can move radially in the placing cylinder, and the profile size of the outside of inner clamping plate increases, can hold the inner wall of wire cylinder, avoids the wire cylinder to appear the rotation under the thread traction, influences overedging quality.

Description

Technical Field

[0001] This utility model belongs to the field of sewing and relates to an adjustable overlock sewing machine. Background Technology

[0002] An overlock sewing machine is an industrial sewing equipment mainly used for overlocking, overlocking, and binding edges of clothing, knitwear, and other fabrics. It can prevent fabric frayed edges from coming loose and can handle thin, medium, and thick materials as well as special materials. In addition to binding edges, it can also be used to sew T-shirts, sportswear, underwear, knitwear, and other fabrics. Overlock sewing machines can cut and sew simultaneously, and the stitches are like mesh. It is also suitable for elastic fabrics.

[0003] Existing overlock sewing machines generally include a sewing execution system, a cutting system, a stitch control system, and a tension system. The thread spool is placed behind the rear thread holder, so that the thread passes through the guide coil, tension plate, and thread hook to the needle. Then the presser foot presses down to fix the fabric, and the cutter is preset to the width. The subsequent process is as follows: the needle pierces the bottom of the fabric → the needle rises to form a thread loop → the curved needle hooks into the straight needle thread loop → the straight needle pierces again, and the curved needle wraps the thread → the feed dog pushes the fabric forward → the upper and lower cutters cut the fabric edge → the thread take-up lever tightens the stitch.

[0004] Existing overlock sewing machines require the spool to be placed on a limiting rod on a mounting frame before thread feeding. However, in practice, the limiting rod is often a combination of a rod and a frustum, which only limits the bottom of the spool when it's placed outside. When the thread tension is high, there's a risk of the spool rotating. Simultaneously, vibrations from the machine can cause the spool to move relative to the limiting rod, rendering it ineffective. The spool may then rotate under the pull of the thread or fall off. This rotation makes it difficult to control the thread release speed and tension, severely reducing sewing quality and resulting in noticeable wavy or uneven stitches. It can also cause the fabric edges to shrink, wrinkle, or curl.

[0005] Therefore, an adjustable overlock sewing machine is proposed to solve the above problems. Summary of the Invention

[0006] To solve the above problems, this utility model proposes an adjustable overlock sewing machine. By setting a component that can expand and contract radially inside the placement tube, after the spool is placed on the placement frame, the component can clamp the inside of the spool, thereby fixing and limiting the spool and preventing the spool from rotating with the sewing thread, which would affect the overlock sewing quality.

[0007] The specific technical solution of this utility model is as follows: an adjustable overlock sewing machine includes an overlock sewing machine body, an inlet section is provided on the upper surface of the overlock sewing machine body, an overlock section is provided on the left side of the overlock sewing machine body, a placement frame is fixedly connected to the rear side of the overlock sewing machine body, a thread hanging frame is fixedly connected above the placement frame, and a number of placement cylinders with a height greater than or equal to the standard height of the thread spool are fixedly connected in a straight array on the upper surface of the placement frame. The placement cylinder is provided with a radially movable inner clamping plate and an adjustment device for driving the inner clamping plate to move radially. The operating part of the adjustment device protrudes to the top of the placement cylinder.

[0008] The placement tube on the rack is used to hold the thread spool. Inside the placement tube are an inner clamping plate and an adjusting device. The inner clamping plate can move radially within the placement tube and radially outward. The increased outer dimensions of the inner clamping plate allow it to grip the inner wall of the thread spool, preventing rotation under the pull of the sewing thread and thus avoiding any impact on the overlock stitch quality. The height of the placement tube is greater than or equal to the standard height of the thread spool, with the operating part protruding beyond the top of the placement tube. This ensures that when the thread spool is placed on the placement tube, the operating part is outside the spool, facilitating the operation of the adjusting device inside the placement tube. The adjusting device can have various structural forms, as long as it allows for radial movement of the inner clamping plate.

[0009] Preferably, the placement cylinder is cylindrical, with a square inner hole at its axis. The adjusting device is disposed within this inner hole, and a radially penetrating groove is provided on the middle side wall of the placement cylinder. An inner clamping plate is disposed within this groove and can move radially along the placement cylinder within it. The square inner hole limits the axial movement of the components of the adjusting device, preventing rotation, thus converting rotation into movement.

[0010] Preferably, the bottom of the placement cylinder is provided with a base plate, and a connection hole is provided in the center of the base plate.

[0011] Preferably, the through groove is rectangular, and the inner clamping plate is rectangular to fit the through groove. A rubber pad is provided on the outer surface of the inner clamping plate, and the outer side of the rubber pad is curved. The rectangular shape of the through groove can limit the inner clamping plate and prevent it from rotating. The rubber pad has a certain degree of elasticity, which is conducive to contact with the inner wall of the spool. Furthermore, the curved outer surface of the rubber pad can prevent damage to the inner wall of the spool.

[0012] Preferably, the sidewall of the through groove is provided with a guide groove perpendicular to the axis of the placement cylinder, the guide groove penetrates the placement cylinder, and guide blocks adapted to the guide groove are provided on both sides of the inner clamping plate. This further defines the radial movement of the inner clamping plate by the cooperation of the guide groove and the cutter block.

[0013] Preferably, there are two inner clamping plates, which are symmetrically arranged relative to the axis of the placement cylinder, and a tension spring connects the two inner clamping plates. The tension spring allows the two inner clamping plates to retract after the external force is released, making it easy to remove the spool from the placement cylinder.

[0014] Preferably, the adjusting device includes a bidirectional threaded rod rotatably connected to the bottom of the placement cylinder, two movable blocks disposed on the bidirectional threaded rod, and an operating part fixedly connected to the end of the bidirectional threaded rod; the movable blocks are provided with inclined surface structures that cooperate with the inner surface of the inner clamping plate to drive the inner clamping plate to move radially. The bidirectional threaded rod and the movable blocks are threadedly engaged, which can convert the rotation of the bidirectional threaded rod into the axial movement of the movable blocks, thereby realizing the radial movement of the inner clamping plate.

[0015] Preferably, the movable block is square in shape, and the inclined structure is set at the end of the movable block. The inclined structures on the two movable blocks on the bidirectional threaded rod are arranged opposite to each other; the inclined structure at the end of the movable block is a four-sided pyramidal structure.

[0016] Preferably, the cable hanging rack is a lifting structure, and the cable hanging rack is equipped with hooks. The number of hooks is the same as the number of placement tubes, and the position of the hooks corresponds to the position of the placement tubes.

[0017] As a preferred option, the shelf has a hollow structure with a pull-out storage box inside, which has multiple compartments.

[0018] The beneficial effects of this utility model are as follows: The placement tube on the placement rack is used to place the thread spool. Inside the placement tube are an inner clamping plate and an adjusting device. The inner clamping plate can move radially within the placement tube and radially outward. The increased outer contour of the inner clamping plate allows it to clamp the inner wall of the thread spool, preventing the spool from rotating under the pull of the sewing thread and affecting the quality of the overlock stitch. The height of the placement tube is greater than the standard height of the thread spool, so the upper end of the placement tube extends beyond the top of the thread spool, facilitating the operation of the adjusting device inside the placement tube. The adjusting device can have various structural forms, as long as it allows for radial movement of the inner clamping plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the back of this utility model;

[0021] Figure 3 This is an exploded view of a placement tube according to the present invention;

[0022] Figure 4 This is an exploded view of an adjusting device according to the present invention;

[0023] Figure 5This is a schematic diagram of the structure of an inner clamping plate according to the present invention;

[0024] Figure 6 This is a structural schematic diagram of a storage box according to the present invention;

[0025] In the diagram: 1. Overlock machine body, 2. Overlock section, 3. Thread inlet section, 4. Thread hanger, 5. Hook, 6. Lifting rod, 7. Placement rack, 8. Placement tube, 9. Storage box, 10. Inner hole, 12. Through groove, 13. Operating section, 14. Moving block, 15. Inner clamping plate, 16. Tension spring, 17. Two-way threaded rod, 18. Sloping structure, 19. Rubber pad, 20. Guide block, 21. Partition plate, 22. Vertical groove. Detailed Implementation

[0026] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings. Example

[0027] like Figure 1 Figure 2 As shown, an adjustable overlock sewing machine includes an overlock sewing machine body 1. The upper surface of the overlock sewing machine body is provided with a thread inlet 3, and a rotating hook (not shown in the figure) is provided at the end of the thread inlet. An overlock sewing part 2 is provided on the left side of the overlock sewing machine body. The overlock sewing machine body adopts an existing overlock sewing machine body structure, such as that produced by Singer or JUKI.

[0028] A placement frame 7 is fixedly connected to the rear side of the overlock sewing machine body. A thread hanging frame 4 is fixedly connected to the top of the placement frame. The placement frame is fixed to the back of the overlock sewing machine body by a fixed post. Four placement cylinders 8 with a height greater than the standard height of the thread spool are fixedly connected in a straight line array on the upper surface of the placement frame. The outer diameter of the placement cylinder is adapted to the inner diameter of the thread spool. The interior of the placement cylinder is provided with a radially movable inner clamping plate 15 and an adjustment device for driving the inner clamping plate to move radially. The operating part 13 of the adjustment device protrudes to the top of the placement cylinder.

[0029] like Figure 3 As shown, the placement cylinder is cylindrical, with a square inner hole 10 at its axis. An adjusting device is located within this inner hole. A radially penetrating groove 12 is provided on the middle side wall of the placement cylinder, and an inner clamping plate is positioned within this groove, allowing it to move radially along the placement cylinder. A base plate is located at the bottom of the placement cylinder, with a connecting hole (not shown in the figure) at its center. The groove is rectangular, and the inner clamping plate is rectangular to fit the groove. A rubber pad 19 is provided on the outer surface of the inner clamping plate, with the outer surface of the rubber pad being a convex curved surface. There are two inner clamping plates inside the placement cylinder, symmetrically arranged relative to the axis of the placement cylinder, and a tension spring 16 connects the two inner clamping plates.

[0030] Furthermore, such as Figure 5As shown, the inner clamping plate has laterally protruding guide blocks 20 on both sides, and the side wall of the through groove has a guide groove (not shown in the figure) that is perpendicular to the cylinder axis. The guide blocks are rectangular, and the shape of the guide groove matches the shape of the guide blocks. One end of the guide block corresponding to the outer side of the inner clamping plate is arc-shaped, and this arc shape matches the curved surface arc of the outer side of the rubber pad.

[0031] like Figure 4 As shown, the adjusting device includes a bidirectional threaded rod 17 rotatably connected to the bottom of the placement cylinder, two movable blocks 14 disposed on the bidirectional threaded rod, and an operating part 13 fixedly connected to the end of the bidirectional threaded rod. The end of each movable block is provided with an inclined surface structure 18 that cooperates with the inner surface of the inner clamping plate to drive the inner clamping plate to move radially. The inclined surface structures on the two movable blocks on the bidirectional threaded rod are arranged opposite to each other. The movable blocks are square in shape, and the inclined surface structure at the end of each movable block is a quadrangular pyramidal structure. After the bidirectional threaded rod rotates, the two movable blocks approach each other, the inclined surface structure contacts the surface of the inner clamping plate, and pushes the inner clamping plate radially outward. The rubber pad of the inner clamping plate gradually extends beyond the outer cylindrical surface of the placement cylinder. After the spool is placed on the placement cylinder, the inner clamping plate abuts against the inner wall of the spool, clamping the spool tightly.

[0032] The cable hanging rack is T-shaped and features a lifting mechanism. The central lifting rod 6 is vertically fixed to the upper surface of the rack. Hooks 5 are located at the top of the rack, the number of which matches the number of storage tubes, and their positions correspond to the positions of the tubes. The rack has a hollow interior, containing a pull-out storage box 9. Figure 6 As shown, the inner sidewall of the storage box is provided with multiple sets of opposing vertical grooves 22, and a partition 21 is vertically inserted into the groove, which divides the storage box into multiple storage compartments.

[0033] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An adjustable overlock sewing machine, characterized in that, The machine includes a sewing machine body (1), an inlet (3) on the upper surface of the sewing machine body, a sewing part (2) on the left side of the sewing machine body, a placement frame (7) fixedly connected to the rear side of the sewing machine body, a hanging frame (4) fixedly connected above the placement frame, and a number of placement cylinders (8) with a height greater than or equal to the standard height of the thread spool fixedly connected in a straight array on the upper surface of the placement frame. The placement cylinder has a radially movable inner clamping plate (15) and an adjustment device for driving the inner clamping plate to move radially. The operating part (13) of the adjustment device protrudes to the top of the placement cylinder.

2. The adjustable overlock sewing machine according to claim 1, characterized in that, The placement cylinder is cylindrical, with a square inner hole (10) at its axis. An adjustment device is located inside the inner hole. A radially penetrating groove (12) is provided on the middle side wall of the placement cylinder. An inner clamping plate is located in the groove and can move radially along the placement cylinder within the groove.

3. An adjustable overlock sewing machine according to claim 2, characterized in that, The bottom of the placement cylinder is equipped with a base plate, and a connection hole is provided in the center of the base plate.

4. An adjustable overlock sewing machine according to claim 2, characterized in that, The through groove is rectangular, and the inner clamping plate is rectangular to match the through groove. A rubber pad (19) is provided on the outer surface of the inner clamping plate, and the outer side of the rubber pad is curved.

5. An adjustable overlock sewing machine according to claim 2, characterized in that, The side wall of the through groove is provided with a guide groove perpendicular to the axis of the placement cylinder. The guide groove passes through the placement cylinder, and the two sides of the inner clamping plate are provided with guide blocks (20) that are adapted to the guide groove.

6. An adjustable overlock sewing machine according to claim 1, 2, 3, 4, or 5, characterized in that, There are two inner clamping plates, which are symmetrically arranged relative to the axis of the placement cylinder, and a tension spring (16) connects the two inner clamping plates.

7. An adjustable overlock sewing machine according to claim 1, 2, 3, 4, or 5, characterized in that, The adjustment device includes a bidirectional threaded rod (17) rotatably connected to the bottom of the placement cylinder, two movable blocks (14) disposed on the bidirectional threaded rod, and an operating part fixedly connected to the end of the bidirectional threaded rod; the movable blocks are provided with an inclined surface structure (18) that cooperates with the inner surface of the inner clamping plate to drive the inner clamping plate to move radially.

8. An adjustable overlock sewing machine according to claim 7, characterized in that, The movable block is square in shape, with an inclined structure at the end of the movable block. The inclined structures on the two movable blocks on the bidirectional threaded rod are arranged opposite each other. The inclined structure at the end of the movable block is a four-sided pyramidal structure.

9. An adjustable overlock sewing machine according to claim 1, 2, 3, 4, or 5, characterized in that, The hanging frame is a lifting structure, and hooks (5) are provided on the hanging frame. The number of hooks is the same as the number of placement tubes, and the position of the hooks corresponds to the position of the placement tubes.

10. An adjustable overlock sewing machine according to claim 1, characterized in that, The shelf has an internal hollow structure, and the inside of the shelf is equipped with a pull-out storage box (9), which has multiple compartments.

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