A sewing device

Abstract

A sewing device. Mainly solve the problem of insufficient sewing quality caused by the height difference between the clamping plate on the circulating plate and the working surface when sewing in the bag opening machine (bag attaching machine). Its characterized in that: it further includes a liftable boss (4) having a raised position protruding from the upper end surface of the workbench plate and a lowered position not protruding from the upper end surface of the workbench plate; the boss is correspondingly arranged below the follow-up presser foot; a through hole (41) is arranged on the boss and is oppositely arranged with the needle. The utility model provides a sewing device, which has a liftable boss, which is lowered when the frame body is conveyed in, and is raised after the frame body is in place and is used in adaptation with the follow-up presser foot, thereby providing a firm base for the sewing needle, and is particularly suitable for sewing thick materials or special fabrics with high density, thereby ensuring the stability of the sewing process.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment, and specifically to a sewing device. Background Technology

[0002] A patching machine is a specialized sewing machine used to sew open pockets on garments.

[0003] As shown in Chinese Patent Publication No. CN115387038A, the bag-applying machine includes mechanisms such as bag folding and sewing. The fabric moves between these mechanisms along with the frame. In the conventional sewing process, a through hole is usually set on the base plate, and the fabric is placed on the clamping plate (the clamping plate is placed on the circulating plate). There is a height difference between the fabric and the base plate. Due to the height difference, problems such as broken threads and unsightly stitches can occur, which is especially difficult to process when sewing narrow edges. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a sewing device, which mainly solves the problem that the height difference between the clamping plate on the circulating plate and the working surface during sewing in the current bag opening machine (bag attaching machine) leads to insufficient sewing quality.

[0005] The technical solution of this utility model is as follows: A sewing device includes a worktable and a machine body. The machine body includes a sewing head, which is equipped with a follower presser foot and a needle. The height-adjustable boss has a raised position that protrudes from the upper end surface of the worktable and a lowered position that does not protrude from the upper end surface of the worktable; the boss is correspondingly located below the follower pressure foot. A through hole is provided on the protrusion and is positioned opposite to the needle.

[0006] The machine body also includes a base, on which a power source and a mounting plate driven by the power source to lift are installed, and the boss is provided on the mounting plate.

[0007] A base plate is mounted on the drive rod of the power source, a support column is provided on the base plate, and the mounting plate is mounted on the top of the support column.

[0008] It also includes a limiting block, which is disposed above the base plate.

[0009] The workbench is provided with a detachable cover plate, and the cover plate is provided with a through guide groove adapted to the mounting plate.

[0010] The base is provided with a fixing plate, a rotary shuttle assembly is provided below the fixing plate, and the mounting plate is located above the fixing plate.

[0011] The base is provided with a detachable connecting plate, and the power source and the limiting block are mounted on the connecting plate.

[0012] It also includes an operating slot, which is exposed after the cover is removed, and one or more of the fixing plate, the power source, the base plate, and the mounting plate are located in the operating slot.

[0013] It also includes a lower plate that can be detachably mounted on the mounting plate, and the boss is provided on the upper end face of the lower plate.

[0014] The beneficial effects of this utility model are: This utility model provides a sewing device with a liftable boss that descends when the frame is fed in and rises to match the follow-up presser foot after the frame is in place, providing a solid base for the sewing needle. It is especially suitable for sewing thick or high-density special fabrics, ensuring the stability of the sewing process. Attached Figure Description

[0015] Figure 1 This is a partial explosion diagram of one embodiment of the present invention.

[0016] Figure 2 This is a perspective view of one embodiment of the present invention.

[0017] Figure 3 This is a perspective view of one embodiment of the present invention.

[0018] Figure 4 This is a perspective view of one embodiment of the present invention.

[0019] Figure 5 This is a perspective view of one embodiment of the present invention.

[0020] Figure 6 This is a partial perspective view of one embodiment of the present invention. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings. A sewing device includes a worktable 1 and a machine body 2. The machine body includes a sewing head 3, which is provided with a follower presser foot 31 and a needle 32. It also includes a liftable boss 4, which has a raised position protruding from the upper surface of the worktable and a lowered position not protruding from the upper surface of the worktable. The boss is correspondingly located below the follower presser foot. A through hole 41 is provided on the boss and is positioned opposite to the needle. The liftable boss provides stable support for special sewing parts, and works in conjunction with the follower presser foot to effectively prevent skipped stitches and needle breakage, ensuring even and beautiful stitches. The liftable feature of the boss is that it lowers when the frame is fed in and rises after the frame is in place to adapt to the follower presser foot, providing a solid base for the needle. This is particularly suitable for sewing thick or fluffy fabrics, ensuring the stability of the sewing process.

[0022] Besides the cylinder drive mentioned in the text, this boss can also be achieved in other ways, such as... Linear motor: The mover (primary) of the linear motor is directly connected to the mounting plate, and the stator (secondary) is fixed to the base. After being powered on, the mover directly generates linear motion, driving the boss to rise and fall.

[0023] Stepper motor / servo motor + ball screw: Implementation: A servo motor or stepper motor drives a precision ball screw to rotate via a coupling. The nut on the screw moves up and down accordingly, causing the mounting plate to rise and fall.

[0024] Stepper / servo motor + synchronous belt / rack and pinion: The motor drives the synchronous pulley or gear, which converts the rotary motion into linear motion through the synchronous belt or rack, thereby driving the mounting plate to rise and fall, etc.

[0025] In this embodiment, as shown in the figure, the machine body further includes a base 5, on which a power source 51 and a mounting plate 52 driven by the power source to rise and fall are mounted. The boss is disposed on the mounting plate. The power source is preferably a cylinder or an electric push rod, which provides power for the raising and lowering of the boss. Using a cylinder is fast, simple in structure, low in cost, and technically mature.

[0026] In this embodiment, as shown in the figure, a base plate 53 is mounted on the drive rod of the power source, a support column 54 is provided on the base plate, and the mounting plate is mounted on the top of the support column. This structure forms a stable transmission chain and smoothly transmits the drive of the power source to the mounting plate.

[0027] In this embodiment, as shown in the figure, a limiting block 55 is also included, which is correspondingly disposed above the base plate. To ensure the accuracy of the lifting stroke, a limiting block is also included, which is correspondingly disposed above the base plate to limit the maximum upward position of the base plate and the mounting plate.

[0028] In this embodiment, as shown in the figure, the worktable is provided with a detachable cover plate 6, and the cover plate has a through guide groove 61 adapted to the mounting plate. For ease of maintenance and adjustment, the worktable is provided with a detachable cover plate, and the cover plate has a through guide groove adapted to the mounting plate. The guide groove ensures that the mounting plate remains stable during lifting and lowering, preventing deflection.

[0029] In this embodiment, as shown in the figure, a fixing plate 56 is provided on the machine base, a rotary hook assembly 561 is provided below the fixing plate, and a mounting plate is located above the fixing plate. This structure spatially integrates the lifting mechanism of the boss with the core thread hook system (rotary hook) of the sewing machine, resulting in a compact layout. All the through holes on the fixing plate are interconnected, and the through holes allow the needle to pass through.

[0030] In this embodiment, as shown in the figure, the base is provided with a detachable connecting plate 57, and the power source and the limiting block are mounted on the connecting plate. Specifically, they can be disassembled and assembled using screws.

[0031] In this embodiment, as shown in the figure, an operating slot 7 is also included. When the cover plate is removed, one or more of the fixing plate, the power source, the base plate, and the mounting plate are located within the operating slot. The design of the detachable cover plate (which can be disassembled and reassembled with screws), the connecting plate, and the operating slot makes the installation, debugging, and maintenance of the internal mechanism very convenient.

[0032] In this embodiment, as shown in the figure, a lower plate 521 is also included, which is detachably mounted on the mounting plate. The boss is located on the upper surface of the lower plate. It can be disassembled and assembled using screws.

[0033] The working principle of this utility model is as follows: The working principle of this utility model is based on an automated cycle of "avoidance-positioning-working," specifically as follows: When sewing fabric fixed to the frame is required: Avoidance stage: The boss descends: The power source 51 first drives the boss 4 to descend to its lowered position, ensuring that the upper surface of the boss 4 does not protrude from the upper surface of the worktable 1. This is to provide an unobstructed passage for the smooth movement and precise positioning of the frame, preventing the boss from interfering with or colliding with the frame. Positioning stage: After the boss 4 descends to its lowest position, the frame carrying the fabric can move smoothly and pass through the area above the boss 4 until it reaches the preset sewing processing position. Working stage: The boss rises and sewing: After the frame is positioned, the power source 51 is activated, pushing the mounting plate 52 and the boss 4 together to rise through the drive rod, base plate 53, and support column 54, so that the boss 4 protrudes from the worktable surface, forming a stable sewing support platform. Sewing Operation: Subsequently, the sewing head 3 starts, and the needle 32, in conjunction with the rotary hook assembly 561, performs the sewing operation with the assistance of the follow-up presser foot 31. During this process, the boss 4 provides solid support for the sewing area, effectively ensuring sewing quality. Cycle Completion: After sewing is completed, the power source 51 retracts, causing the boss 4 to descend again, detaching from the frame, preparing for the removal of the frame or the entry of the next frame, thus completing one work cycle. The guide groove 61 ensures that the boss 4 remains vertically stable and does not wobble during the lifting and lowering process; the limit block 55 precisely controls the upward stroke of the boss 4, ensuring that it can provide effective support without over-lifting.

[0034] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A sewing device, comprising a worktable (1) and a machine body (2), the machine body comprising a sewing head (3), the sewing head being provided with a follow-up presser foot (31) and a sewing needle (32), characterized in that: Also includes The liftable boss (4) has a raised position protruding from the upper end face of the worktable and a lowered position not protruding from the upper end face of the worktable; the boss is correspondingly located below the follower presser foot. A through hole (41) is provided on the protrusion and is positioned opposite to the needle.

2. A sewing device according to claim 1, characterized in that: The machine body also includes a base (5), on which a power source (51) and a mounting plate (52) driven by the power source to lift are installed, and the boss is provided on the mounting plate.

3. A sewing device according to claim 2, characterized in that: A base plate (53) is mounted on the drive rod of the power source, and a support column (54) is provided on the base plate. The mounting plate is installed on the top of the support column.

4. A sewing device according to claim 3, characterized in that: It also includes a limiting block (55), which is disposed above the base plate.

5. A sewing device according to claim 4, characterized in that: The workbench is provided with a detachable cover plate (6), and the cover plate is provided with a through guide groove (61) adapted to the mounting plate.

6. A sewing device according to claim 5, characterized in that: The base is provided with a fixing plate (56), and a rotary shuttle assembly (561) is provided below the fixing plate. The mounting plate is located above the fixing plate.

7. A sewing device according to claim 4, characterized in that: The base is provided with a detachable connecting plate (57), and the power source and the limiting block are installed on the connecting plate.

8. A sewing device according to claim 6, characterized in that: It also includes an operating slot (7), which is exposed after the cover is removed, and one or more of the fixing plate, the power source, the base plate, and the mounting plate are located in the operating slot.

9. A sewing device according to claim 2, characterized in that: It also includes a lower plate (521) that can be detachably mounted on the mounting plate, the boss being located on the upper end face of the lower plate.

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