Garment lower hem thread trimming device free of manual trimming

Abstract

The utility model relates to clothing machinery, in particular to a clothing lower hem thread trimming device free of manual trimming, which comprises a lower thread trimming unit mounted below a needle plate surface of a sewing machine and an upper thread trimming unit mounted on a machine body of the sewing machine. The upper trimming unit and the lower trimming unit are provided with the same suction and shearing integrated module, the upper trimming unit can move downwards and be close to the needle plate face, and the upper trimming unit and the lower trimming unit attract and shear thread ends on upper threads and bottom threads of clothes pieces respectively. The device has remarkable advantages in the aspects of improving the production efficiency, reducing the cost, improving the product quality and the like, and is an ideal choice for automatic upgrading of the clothing manufacturing industry.

Description

Technical Field

[0001] This utility model relates to garment machinery, and more particularly to a garment hem trimming device that eliminates the need for manual trimming. Background Technology

[0002] Currently, most thread trimming at the hem of crew neck sweaters in factories is done manually, with only a very small number using thread trimming devices. Manual trimming increases labor intensity, and thread trimming devices can only trim the top thread, not the bottom thread, so the bottom thread still needs to be trimmed manually. In short, none of the existing thread trimming devices can simultaneously trim both the top and bottom threads, achieving a completely trimm-free function. Utility Model Content

[0003] This utility model aims to overcome the shortcomings of existing technologies and provide a garment hem trimming device that eliminates the need for manual trimming. To achieve the above objective, this utility model provides the following technical solution:

[0004] A garment hem trimming device that eliminates the need for manual trimming includes a lower trimming unit installed below the needle plate of a sewing machine and an upper trimming unit installed on the sewing machine body. Unlike existing technologies, the upper trimming unit and the lower trimming unit have the same integrated suction and cutting module. The upper trimming unit can move downwards and approach the needle plate to attract and cut the thread ends on the garment surface and the bottom thread, respectively, together with the lower trimming unit.

[0005] Furthermore, the suction and shearing integrated module includes a suction body, on which a shearing module is integrated. The suction body includes a shell with an opening at the top. Multiple grooves are formed on the side of the shell facing the shearing blade of the shearing module to allow wire heads to pass through. The inner ends of the multiple grooves are connected to suction ports. The suction ports are connected to suction pipes, and the suction pipes are connected to negative pressure pipes.

[0006] Furthermore, the housing is provided with one or more first air blowing pipes, and multiple first air blowing ports are opened on the housing that are alternate with the outer ends of the multiple wire grooves. The first air blowing pipes are connected to all the first air blowing ports, and the first air blowing pipes are connected to high-pressure pipes.

[0007] Furthermore, the first air outlet corresponds one-to-one with each of the multiple wire grooves.

[0008] Furthermore, the housing is provided with one or more second air blowing pipes, and multiple second air blowing ports are opened inside the housing and below the shearing module. The second air blowing pipes are connected to all the second air blowing ports and are connected to high-pressure pipes.

[0009] Furthermore, the second air outlet is oriented towards the cutting edge of the shearing module.

[0010] Furthermore, the shearing module includes a fixed blade assembly fixedly connected to the suction body and sealing the upper opening of the housing, a movable blade assembly slidably engaged with the fixed blade assembly, and a drive groove formed below the movable blade assembly; a shearing motor is fixedly connected to the lower end of the housing, an eccentric wheel is fixedly mounted on the motor shaft of the shearing motor, the eccentric wheel enters the drive groove, the drive groove is in clearance engagement with the eccentric wheel in the direction of the reciprocating motion of the movable blade assembly, and does not interfere with the eccentric wheel in the direction perpendicular to the reciprocating motion of the movable blade assembly.

[0011] Furthermore, the motor shaft of the shearing motor elastically presses against the movable blade.

[0012] Furthermore, a fixed frame is fixed on the body of the sewing machine. The upper section of the fixed frame is fixed with a cylinder whose axial direction is up and down, and the lower end is fixed with a guide rail whose stroke is up and down. The guide rail is slidably engaged with a sliding plate. The cylinder rod of the cylinder is connected to the sliding plate, and the upper thread cutting unit is fixed on the sliding plate.

[0013] Furthermore, a third air pipe is fixed to the lower end of the fixing frame, and multiple downward-facing third air outlets are opened on the third air pipe.

[0014] Compared with the prior art, the garment hem trimming device of this utility model that eliminates the need for manual trimming has the following advantages:

[0015] 1. Improve production efficiency: By replacing manual trimming with automated thread trimming devices, the labor intensity of workers is significantly reduced, while production efficiency is improved, making the thread trimming process of garment hems faster and more continuous.

[0016] 2. Improve product quality: The automated thread cutting device can accurately cut the top and bottom threads, avoiding accidental cutting that may occur during manual trimming, thereby improving the yield rate of garment hems.

[0017] 3. Reduced costs: Reduced manual operation lowers labor costs, and the high efficiency of the wire cutting device reduces material waste, further reducing production costs.

[0018] 4. Easy to operate: The device is easy to install and operate, and sewing machine operators can quickly master its use without additional professional training.

[0019] 5. Easy maintenance: Due to its modular design, the various components of the wire cutting device are easy to disassemble and replace, facilitating daily maintenance and repair.

[0020] 6. Environmentally friendly: It reduces lint and debris generated by manual trimming, improves the working environment, and also reduces pollution to the environment.

[0021] 7. High adaptability: This thread-cutting device is suitable for various types of sewing machines, has good versatility, and can be widely used in different garment production lines.

[0022] 8. Enhanced safety: Reduced manual operation steps lowered safety risks during the work process and protected the safety of operators.

[0023] 9. Reduced energy consumption: Automated wire trimming devices consume less energy than manual trimming, helping companies achieve their energy conservation and emission reduction goals.

[0024] 10. Improve equipment utilization: Since the thread trimming process no longer requires manual intervention, the utilization rate of sewing machines is improved, reducing equipment downtime.

[0025] In summary, the garment hem trimming device of this invention, which eliminates the need for manual trimming, has significant advantages in improving production efficiency, reducing costs, and enhancing product quality, making it an ideal choice for the automation upgrade of the garment manufacturing industry. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0028] Figure 3 This is a structural schematic diagram from another perspective of the present invention.

[0029] Figure 4 for Figure 3 A magnified view of a section at point B in the middle.

[0030] Figure 5 This is a structural schematic diagram of the integrated suction and shearing module of this utility model.

[0031] Figure 6 This is a schematic diagram of the suction body of the integrated suction and shearing module of this utility model.

[0032] Figure 7 This is a structural schematic diagram of the suction body of the integrated suction and shearing module of this utility model from another perspective.

[0033] Figure 8 This is a schematic diagram of the shearing module of the integrated suction and shearing module of this utility model. Detailed Implementation

[0034] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] like Figure 1-8 The illustrated garment hem trimming device, which eliminates the need for manual trimming, includes a lower trimming unit 200 installed below the needle plate 101 of a sewing machine 100 and an upper trimming unit 300 installed on the body of the sewing machine 100. The upper trimming unit 300 and the lower trimming unit 200 have the same suction and cutting integrated module 23. The upper trimming unit 300 can move downward and approach the needle plate 101, and together with the lower trimming unit 200, attract and cut the thread ends on the garment surface and the bottom thread, respectively. The suction and shearing integrated module 23 includes a suction body 231, on which a shearing module 232 is integrated. The suction body 231 includes a shell 2311 with an opening at the top. Seven grooves 2312 for thread heads to pass through are opened on the side of the shell 2311 facing the shearing blade of the shearing module 232. The inner ends of the seven grooves 2312 are connected to suction ports 2313. The suction ports 2313 are connected to suction pipes 2314. The suction pipes 2314 are connected to negative pressure pipes 24.

[0038] The working principle of this garment hem trimming device that eliminates the need for manual trimming is as follows:

[0039] 1. Integrated suction and cutting design: The core of this device is the integrated suction and cutting module 23, which integrates the two major functions of suction and cutting, so that the suction and cutting of the thread ends can be completed in the same module.

[0040] 2. Suction system: The suction body 231 is composed of a housing 2311. The upper end of the housing is open and the interior is designed with 7 wire grooves 2312. These wire grooves are used to guide the wire ends into the suction port 2313.

[0041] The air intake 2313 is connected to the negative pressure pipe 24 through the air intake pipe 2314 to form a negative pressure system for attracting and conveying the wire ends.

[0042] 3. Cutting system: The cutting module 232 is installed at the upper end of the suction body 231, adjacent to the inner end of the wire groove 2312, and is responsible for cutting off the sucked-in wire ends.

[0043] The shearing module 232 includes a fixed blade 2321 and a movable blade 2322, which cooperate to cut the thread ends. The movable blade 2322 is connected to the shearing motor 2324 through a drive slot 2323. The eccentric wheel 2325 on the motor shaft drives the movable blade to reciprocate, thereby realizing the shearing action.

[0044] 4. Thread end attraction and cutting process: When the sewing machine 100 is working, the top and bottom thread ends of the garment piece are attracted by the negative pressure system and sucked into the suction port 2313 along the thread groove 2312. During the suction process, the thread ends are cut by the movable blade 2322 and the fixed blade 2321 in the cutting module 232.

[0045] 5. The upper and lower thread cutting units work together: The upper thread cutting unit 300 and the lower thread cutting unit 200 are responsible for cutting the top thread and bottom thread respectively. They have the same suction and cutting integrated module 23 and can work synchronously. The upper thread cutting unit 300 can move down to approach the needle plate surface 101 and, together with the lower thread cutting unit 200, attract and cut the top thread and bottom thread ends of the garment piece respectively.

[0046] 6. Automated control: The entire thread-cutting process can be synchronized with the sewing action of the sewing machine 100, achieving automated control without manual intervention.

[0047] With this design, the device can automatically attract and cut thread ends during the sewing process, greatly improving production efficiency, reducing labor costs, and enhancing the neatness and aesthetics of the garment hem.

[0048] In another preferred embodiment, a first air blowing pipe 2315 is further provided on the housing 2311, and four first air blowing ports 2316 are opened on the housing 2311, which is adjacent to the outer ends of the seven wire grooves 2312. The first air blowing pipe 2315 communicates with all the first air blowing ports 2316, and the first air blowing pipe 2315 is connected to a high-pressure pipe. The four first air blowing ports 2316 correspond one-to-one with the first, third, fifth, and seventh wire grooves 2312.

[0049] When the sewing machine 100 is operating, high-pressure air is delivered to the first air outlet 2316 through the first air pipe 2315. The airflow from the first air outlet 2316 acts directly on the corresponding thread groove 2312, blowing the thread end into the thread groove. The blowing action helps guide the thread end into the thread groove 2312, especially for those thread ends that are not easily sucked in by negative pressure. At the same time, the blowing action also helps to balance the air pressure, avoid possible garment piece adhesion effects, and prevent garment pieces from getting stuck due to negative pressure adhesion, which would affect the smoothness of the sewing process.

[0050] In another preferred embodiment, the housing 2311 is further provided with one or more second air blowing pipes 2317, and multiple second air blowing ports 2318 are opened inside the housing 2311 below the shearing module 232. The second air blowing pipes 2317 communicate with all the second air blowing ports 2318, and the second air blowing pipes 2317 are connected to high-pressure pipes. The second air blowing ports 2318 face the shearing blade of the shearing module 232.

[0051] The second air duct 2317 also helps to balance the air pressure, avoid the possible adsorption effect of clothing pieces, and prevent clothing pieces from getting stuck due to negative pressure adsorption, which would affect the smoothness of the sewing process. At the same time, it can prevent the accumulation of dust and debris in the sliding contact positions of the drive groove, the fixed blade 2321 and the movable blade 2322, avoid the impact of dust accumulation on transmission performance, improve the operating efficiency of the motor, and reduce the additional friction and wear caused by dust.

[0052] In this example, the shearing module 232 includes a fixed blade 2321 fixedly connected to the suction body 231 and sealing the upper opening of the housing 2311, and a movable blade 2322 slidably engaged with the fixed blade 2321. A drive groove 2323 is formed below the movable blade 2322. A shearing motor 2324 is fixedly connected to the lower end of the housing 2311. An eccentric wheel 2325 is fixed on the motor shaft of the shearing motor 2324. The eccentric wheel 2325 enters the drive groove 2323. The drive groove 2323 is in clearance fit with the eccentric wheel 2325 in the direction of the reciprocating motion of the movable blade 2322, but does not interfere with the eccentric wheel 2325 in the direction perpendicular to the reciprocating motion of the movable blade 2322. This shearing module is similar to a hair clipper, with a simple structure and reduced complex mechanical parts, thereby reducing the possibility of failure. Due to the simple structure and reduced number of moving parts, mechanical wear is reduced accordingly, and the service life of the parts is extended. The simple structure makes maintenance and replacement of parts easier, reducing maintenance time and costs.

[0053] In another preferred embodiment, the motor shaft of the shearing motor 2324 elastically presses against the movable blades 2322. This design, where the motor shaft elastically presses against the movable blades, is similar to the spring mechanism of hair clippers, providing stable shearing force and ensuring effective shearing.

[0054] In this example, a fixed frame 25 is fixed on the body of the sewing machine 100. The upper section of the fixed frame 25 is fixed with a cylinder 26 whose axial direction is up and down, and the lower end is fixed with a guide rail 27 whose stroke is up and down. The guide rail 27 is slidably engaged with a slide plate 28. The cylinder rod of the cylinder 26 is connected to the slide plate 28. The upper thread cutting unit 300 is fixed on the slide plate 28.

[0055] Through the precise control of cylinder 26, the upper thread-cutting unit 300 can accurately approach or move away from the needle plate surface 101, ensuring the accuracy of the cutting position. The rapid response of cylinder 26 allows the upper thread-cutting unit 300 to quickly approach or move away from the needle plate surface 101, improving thread-cutting efficiency. The simple mechanical structure reduces potential failure points and improves the reliability of the entire system. The system can adjust the position of the upper thread-cutting unit 300 according to different sewing needs, improving the adaptability and flexibility of the thread-cutting device. Through this design, the upper thread-cutting unit 300 can achieve efficient and reliable automatic thread-cutting function, precisely synchronized with the sewing action of the sewing machine 100, reducing manual intervention and improving production efficiency and product quality.

[0056] In another preferred embodiment, a third air blowing pipe 29 is fixed to the lower end of the fixing frame 25, and the third air blowing pipe 29 has multiple downward-facing third air blowing ports. The airflow from the air blowing ports helps to smooth the garment pieces, reducing wrinkles and unevenness, and ensuring the flatness of the garment pieces during the sewing process. The air blowing also helps guide the thread ends towards the suction port, improving the efficiency of thread end suction. The air blowing reduces the possibility of thread ends escaping during the cutting process, ensuring that all thread ends are accurately cut. This further improves the automation and efficiency of the thread cutting process. This optimized design makes the thread cutting device more reliable and efficient, suitable for continuous industrial production environments.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A garment hem trimming device that eliminates the need for manual trimming, comprising a lower trimming unit (200) installed below the needle plate (101) of a sewing machine (100) and an upper trimming unit (300) installed on the body of the sewing machine (100), characterized in that, The upper thread cutting unit (300) and the lower thread cutting unit (200) have the same suction and cutting integrated module (23). The upper thread cutting unit (300) can move downward and approach the needle plate surface (101) and, together with the lower thread cutting unit (200), attract and cut the thread ends on the garment surface and the bottom thread, respectively.

2. The garment hem trimming device without manual trimming according to claim 1, characterized in that, The suction and shearing integrated module (23) includes a suction body (231), on which a shearing module (232) is integrated. The suction body (231) includes a shell (2311) with an opening at the top. Multiple grooves (2312) for thread heads to pass through are opened on one side of the shell (2311) facing the shearing blade of the shearing module (232). The inner ends of the multiple grooves (2312) are connected to suction ports (2313). The suction ports (2313) are connected to suction pipes (2314). The suction pipes (2314) are connected to negative pressure pipes (24).

3. The garment hem trimming device without manual trimming according to claim 2, characterized in that, The housing (2311) is also provided with one or more first air pipes (2315), and multiple first air ports (2316) are opened on the housing (2311) that are adjacent to the outer ends of the multiple wire grooves (2312). The first air pipes (2315) are connected to all the first air ports (2316), and the first air pipes (2315) are connected to high-pressure pipes.

4. A garment hem trimming device that eliminates the need for manual trimming, as described in claim 3, is characterized in that... Each of the first air outlets (2316) corresponds to one of the multiple wire grooves (2312).

5. A garment hem trimming device that eliminates the need for manual trimming according to claim 2, characterized in that, The housing (2311) is also provided with one or more second air pipes (2317). Multiple second air ports (2318) are opened inside the housing (2311) and below the shearing module (232). The second air pipes (2317) are connected to all the second air ports (2318). The second air pipes (2317) are connected to the high-pressure pipe.

6. A garment hem trimming device that eliminates the need for manual trimming according to claim 5, characterized in that, The second air outlet (2318) faces the cutting edge of the shearing module (232).

7. A garment hem trimming device that eliminates the need for manual trimming according to claim 2, characterized in that, The shearing module (232) includes a fixed blade (2321) that is fixedly connected to the suction body (231) and blocks the upper opening of the housing (2311). The fixed blade (2321) is slidably engaged with a movable blade (2322). A drive groove (2323) is provided below the movable blade (2322). A shearing motor (2324) is fixedly connected to the lower end of the housing (2311). An eccentric wheel (2325) is fixed on the motor shaft of the shearing motor (2324). The eccentric wheel (2325) enters the drive groove (2323). The drive groove (2323) is in clearance engagement with the eccentric wheel (2325) in the direction of the reciprocating motion of the movable blade (2322) and does not interfere with the eccentric wheel (2325) in the vertical direction of the reciprocating motion of the movable blade (2322).

8. A garment hem trimming device that eliminates the need for manual trimming according to claim 7, characterized in that, The motor shaft of the shearing motor (2324) elastically presses against the movable blade (2322).

9. A garment hem trimming device that eliminates the need for manual trimming according to claim 1, characterized in that, The sewing machine (100) has a fixed frame (25) fixed on its body. The upper part of the fixed frame (25) is fixed with a cylinder (26) in the up-down direction and the lower end is fixed with a guide rail (27) in the up-down direction. The guide rail (27) is slidably engaged with a slide plate (28). The cylinder rod of the cylinder (26) is connected to the slide plate (28). The upper thread cutting unit (300) is fixed on the slide plate (28).

10. A garment hem trimming device without manual trimming according to claim 9, characterized in that, The lower end of the fixed frame (25) is fixed with a third air pipe (29), and multiple downward-facing third air outlets are opened on the third air pipe (29).

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