A device for preventing stretch sewing of elastic fabric in garment seams

Abstract

The utility model relates to clothing sewing technical field, concretely relates to a kind of clothing joint seam elastic fabric anti-stretch sewing device, including desktop, first installation platform, sewing machine, needle, sewing table, transmission belt, elastic clamp, motor, clutch assembly, sensor, clutch control switch, power switch, support frame, universal wheel etc. Desktop is embedded first installation platform and transmission belt, first installation platform is equipped with sewing machine, the bottom of sewing machine is equipped with needle, the sewing table below needle is equipped with transmission belt and is opened sewing groove. Transmission belt both ends are equipped with elastic clamp, the motor that drives transmission belt is equipped under desktop, clutch assembly is equipped between motor and transmission belt, elastic clamp is equipped with sensor and is electrically connected with clutch assembly. Elastic clamp clamps clothing when using, transmission belt drives conveying, sensor triggers clutch assembly control transmission belt start-stop, two elastic clamps alternate operation, avoid artificial pulling to cause fabric stretch, guarantee sewing quality, improve efficiency, applicable to batch production.

Description

Technical Field

[0001] This utility model relates to the field of garment sewing technology, specifically to a garment seam elastic fabric anti-stretch sewing device. Background Technology

[0002] As consumer demand for comfort and fit in clothing continues to rise, fabrics containing elastic fibers such as spandex and rubber fibers (e.g., knitted stretch fabrics, stretch denim, stretch chiffon) are increasingly used in sportswear, underwear, and casual wear. These elastic fabrics, with their excellent stretch recovery properties, can adapt to the range of human movement and enhance the wearing experience. However, their tendency to stretch during sewing has become a key pain point affecting product quality, especially in the sewing of garment seams (such as shoulder seams, armhole seams, side seams, and waistband seams), where stretching caused by manual operation is particularly prominent.

[0003] In mass garment production, sewing relies on operators to perform actions such as feeding fabric, aligning selvage edges, and calibrating marking points. Due to efficiency requirements and operational habits, operators often need to manually support the fabric or apply pulling force to the alignment marking points. The fiber structure and loose weave of elastic fabrics amplify the impact of this external force, causing the fabric to stretch and deform immediately. If the stretching continues or exceeds the fiber's elastic limit, it can also cause permanent deformations such as wrinkling at seams, seam allowance misalignment, dimensional deviations, and texture distortion. This not only damages the appearance and pattern of the finished garment but also increases fabric waste and rework costs.

[0004] Existing technologies mostly rely on manual experience to control stretching issues, depending on operator skills. This can easily lead to uneven fabric stress, making it difficult to ensure consistent quality in mass production. Currently, there is a lack of dedicated devices that can replace non-stretching fabric feeding. Developing an anti-stretch sewing device for elastic fabrics that is suitable for garment seam scenarios has become an urgent need in the industry. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a garment seam elastic fabric anti-stretch sewing device to solve the problem that in existing technology, operators often need to manually support the fabric or apply pulling force to align the marking points. However, the fiber structure and loose weave characteristics of elastic fabrics amplify the impact of this external force, causing the fabric to stretch and deform immediately. If the stretching continues or exceeds the fiber elasticity limit, it can also cause permanent deformation such as wrinkling at the seam, seam allowance misalignment, dimensional deviation, and texture distortion, which not only damages the appearance and pattern of the finished garment but also increases fabric waste and rework costs.

[0006] This utility model is achieved through the following technical solution: a garment seam elastic fabric anti-stretch sewing device, including a tabletop, a first mounting platform and a transmission belt embedded in the tabletop, a sewing machine mounted on the first mounting platform, and a needle at the bottom of the sewing machine; a sewing table is located directly below the needle, the sewing table is mounted on the transmission belt, and has a sewing groove adapted to the needle; an elastic clamp is mounted at each end of the transmission belt, both of which are used to clamp clothing; a motor driving the transmission belt is located below the tabletop, and a clutch assembly controlling its start and stop is provided between the motor and the transmission belt; a sensor is mounted on each elastic clamp, and the sensor is electrically connected to the clutch assembly; when one elastic clamp completes its parallel stroke with the transmission belt, the sensor triggers a signal to the clutch assembly, the transmission belt stops rotating, and at this time the other elastic clamp rotates to a position parallel to the tabletop, allowing the clothing on the previous elastic clamp to be removed and re-clamped on the current elastic clamp.

[0007] Furthermore, the clutch assembly includes a rotating assembly and a driven assembly. The rotating assembly includes the motor and a transmission friction wheel. The transmission friction wheel is fixedly connected to the motor. The transmission friction wheel is provided with a first friction enhancement surface, which is located on the side of the transmission friction wheel away from the motor.

[0008] Furthermore, the driven component includes a driven friction wheel, which has a second friction enhancement surface located on the side of the driven friction wheel near the transmission friction wheel. On the side of the driven friction wheel away from the transmission friction wheel, a clutch wheel, a spring, and a fixed abutment wheel are sequentially provided. The clutch wheel is fixedly connected to the driven friction wheel, and when the clutch wheel is squeezed, the driven friction wheel moves away from the transmission friction wheel.

[0009] Furthermore, a groove is provided in the middle of the clutch wheel, and a wrench is provided in the groove. The handle of the wrench is hinged to the second mounting platform through a first rotating shaft.

[0010] Furthermore, the end of the handle of the wrench is hinged to the telescopic rod via a second pivot.

[0011] Furthermore, a clutch control switch is provided on the desktop, and the telescopic rod is electrically connected to the clutch control switch.

[0012] Furthermore, a power switch is provided on the desktop, and the motor is electrically connected to the power switch.

[0013] Furthermore, a support frame is provided below the desktop, and four casters are provided at the bottom of the support frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] This garment seam elastic fabric anti-stretch sewing device uses elastic clamps to stably hold the garment, avoiding the pulling force caused by manual support or alignment marks during sewing. This reduces stretching and deformation of the elastic fabric at the source, solving problems such as seam wrinkling, seam allowance misalignment, and dimensional deviations. It ensures the finished garment has a neat appearance and pattern, reducing fabric waste and rework costs. A drive belt smoothly transports the garment to the sewing table, working in conjunction with the sewing machine needle for precise sewing. No manual fabric feeding is required, improving the consistency of mass production quality. Sensors and a clutch assembly work together to automatically stop the drive belt after the elastic clamp completes its parallel stroke, while another elastic clamp simultaneously rotates to the working position, achieving seamless garment loading and unloading and clamping, improving sewing efficiency. The friction-enhancing surface design of the drive and driven friction wheels in the clutch assembly enhances power transmission stability. The spring and clutch wheel work together to flexibly control the engagement and disengagement of the driven and drive friction wheels, ensuring reliable clutch operation. The hinged structure of the wrench, first rotating shaft, second rotating shaft, and telescopic rod allows for more flexible clutch control. Combined with the clutch control switch, the telescopic rod's movement can be precisely adjusted, further enhancing the device's ease of operation. The power switch facilitates quick control of the motor's start and stop, the support frame provides stable support for the desktop, and the casters facilitate overall device movement, improving usability and meeting the layout requirements of different production scenarios.

[0016] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a partial structural schematic diagram of the separation component of this utility model.

[0020] In the diagram: 1. Desktop; 2. First mounting platform; 3. Sewing machine; 4. Sewing table; 5. Elastic clamp; 6. Drive belt; 7. Clutch control switch; 8. Power switch; 9. Caster wheel; 10. Motor; 11. Drive friction wheel; 12. Driven friction wheel; 13. Clutch wheel; 14. Spring; 15. Fixed abutment wheel; 16. Wrench; 17. First rotating shaft; 18. Second mounting platform; 19. Second rotating shaft; 20. Telescopic rod; 21. Support frame; 22. Needle. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0026] Please see Figure 1-3This utility model provides a technical solution: a garment seam elastic fabric anti-stretch sewing device, including a tabletop 1, a first mounting platform 2 and a transmission belt 6 embedded in the tabletop 1, a sewing machine 3 mounted on the first mounting platform 2, and a needle 22 at the bottom of the sewing machine 3; a sewing table 4 is located directly below the needle 22, the sewing table 4 is mounted on the transmission belt 6, and has a sewing groove adapted to be sewn by the needle 22; an elastic clamp 5 is mounted at each end of the transmission belt 6, and both elastic clamps 5 are used to clamp the garment; a drive mechanism is located below the tabletop 1. The motor 10 of the transmission belt 6 is connected to the transmission belt 6 via a clutch assembly that controls its start and stop. The elastic clamp 5 is equipped with a sensor that is electrically connected to the clutch assembly. When one of the elastic clamps 5 has traveled a distance parallel to the tabletop 1 with the transmission belt 6, the sensor triggers a signal to the clutch assembly, and the transmission belt 6 stops rotating. At this time, the other elastic clamp 5 rotates to a position parallel to the tabletop 1, allowing the clothing on the previous elastic clamp 5 to be removed and re-clamped on the current elastic clamp 5.

[0027] The desktop 1 provides a stable mounting base for the entire device, ensuring that the positions of each component are fixed. The first mounting platform 2 firmly supports the sewing machine 3, ensuring that the needle 22 is vertically aligned with the sewing table 4 to prevent sewing deviation. Its sewing groove provides room for the needle 22 to move, preventing the needle 22 from colliding with the table and damaging the fabric. Two elastic clamps 5 replace manual support, using elastic clamping force to stably fix the garment, completely avoiding the stretching and deformation of the elastic fabric caused by manual pulling. The motor 10 provides power to the transmission belt 6, and works with the clutch assembly to achieve precise start and stop. The sensor is linked with the clutch assembly to ensure that the elastic clamp 5 stops in time after completing its stroke, while the other elastic clamp 5 is simultaneously in place, achieving seamless connection between picking up and clamping, which not only ensures the continuity of sewing but also improves the dimensional consistency of mass production and reduces rework caused by stretching.

[0028] In this embodiment: the clutch assembly includes a rotating assembly and a driven assembly. The rotating assembly includes the motor 10 and a transmission friction wheel 11. The transmission friction wheel 11 is fixedly connected to the motor 10. The transmission friction wheel 11 is provided with a first friction enhancement surface, which is located on the side of the transmission friction wheel 11 away from the motor 10.

[0029] The motor 10 drives the transmission friction wheel 11 to rotate synchronously, ensuring stable power output. The first friction enhancement surface of the transmission friction wheel 11 (such as anti-slip texture or high friction material) can increase the friction with the driven component, avoid slippage during power transmission, ensure uniform speed operation of the transmission belt 6, and thus allow the elastic fabric to be evenly stressed during sewing, reducing local stretching caused by fluctuations in conveying speed.

[0030] In this embodiment: the driven component includes a driven friction wheel 12, the driven friction wheel 12 is provided with a second friction enhancement surface, the second friction enhancement surface is provided on the side of the driven friction wheel 12 close to the transmission friction wheel 11, and a clutch wheel 13, a spring 14 and a fixed abutment wheel 15 are sequentially provided on the side of the driven friction wheel 12 away from the transmission friction wheel 11. The clutch wheel 13 is fixedly connected to the driven friction wheel 12, and when the clutch wheel 13 is squeezed, the driven friction wheel 12 moves away from the transmission friction wheel 11.

[0031] The second friction-enhancing surface of the driven friction wheel 12 cooperates with the first friction-enhancing surface of the transmission friction wheel 11 to further improve the power transmission efficiency; the fixed contact wheel 15 provides rigid support for the spring 14, and the spring 14 continuously pushes the clutch wheel 13 through elastic force, so that the driven friction wheel 12 always fits against the transmission friction wheel 11, ensuring that the power is not interrupted during normal sewing; when the clutch wheel 13 is squeezed, the driven friction wheel 12 can be driven to disengage from the transmission friction wheel 11, quickly cut off the power, realize the immediate stop of the transmission belt 6, avoid the elastic fabric from excessive stretching due to the delay of stopping, and ensure the accuracy of the seam size.

[0032] In this embodiment: a groove is provided in the middle of the clutch wheel 13, and a wrench 16 is provided in the groove. The handle of the wrench 16 is hinged to the second mounting platform 18 through the first rotating shaft 17.

[0033] The groove of the clutch wheel 13 provides installation space for the wrench 16, ensuring that the wrench 16 can stably act on the clutch wheel 13; the second mounting platform 18 fixes the first rotating shaft 17, allowing the wrench 16 to rotate flexibly around the shaft. The operator can easily squeeze the clutch wheel 13 by rotating the wrench 16, reducing the clutch operation force; the hinge structure ensures the stable operation of the wrench 16, avoids the deviation of the driven friction wheel 12 caused by manual operation deviation, ensures the accuracy of clutch operation, and indirectly reduces the risk of fabric stretching.

[0034] In this embodiment, the end of the handle of the wrench 16 is hinged to the telescopic rod 20 via the second pivot 19.

[0035] The second rotating shaft 19 enables a flexible connection between the wrench 16 and the telescopic rod 20. When the telescopic rod 20 extends or retracts, it can drive the wrench 16 to rotate stably around the first rotating shaft 17, replacing manual operation and automating the clutch action. The stroke of the telescopic rod 20 is controllable, which can precisely control the squeezing force of the wrench 16 on the clutch wheel 13, ensuring that the separation / fitting degree of the driven friction wheel 12 and the transmission friction wheel 11 is consistent, avoiding unstable start and stop of the transmission belt 6 due to uneven clutch force, and further ensuring stable force during the sewing of elastic fabric.

[0036] In this embodiment: a clutch control switch 7 is provided on the desktop 1, and the telescopic rod 20 is electrically connected to the clutch control switch 7.

[0037] The clutch control switch 7 on the desktop 1 is easy for operators to access quickly, improving operational convenience. The switch is electrically connected to the telescopic rod 20, which can precisely control the movement of the telescopic rod 20 through electrical signals. It is linked with the stroke signal of the sensor to ensure that the transmission belt 6 stops immediately when the elastic clamp 5 reaches the designated position, avoiding fabric stretching due to delay in human reaction. The electric control method can also reduce human operation errors and improve the consistency of mass production.

[0038] In this embodiment: a power switch 8 is provided on the desktop 1, and the motor 10 is electrically connected to the power switch 8.

[0039] The power switch 8 on the desktop 1 allows for quick and easy control of the motor 10's start and stop without needing to touch the bottom parts of the device, thus improving operational safety. In an emergency, the power switch 8 can be used to immediately cut off the power to the motor 10, preventing the fabric from being continuously stretched and damaged when the equipment malfunctions. During daily use, the motor 10 can be flexibly started and stopped, reducing idling energy consumption and lowering production costs.

[0040] In this embodiment: a support frame 21 is provided below the desktop 1, and four casters 9 are provided at the bottom of the support frame 21.

[0041] The support frame 21 provides rigid support for the desktop 1 and the components above it, ensuring the overall stability of the device and preventing the needle 22 from shifting or the fabric from stretching due to shaking during sewing. Four casters 9 ensure static stability while allowing the device to move flexibly, facilitating adjustments based on production layout and improving workshop space utilization. No disassembly of components is required during movement, reducing handling difficulty and adapting to various production scenarios. Working principle: Rotation; the elastic fabric garment to be sewn is clamped onto the elastic clamp 5 at one end of the transmission belt 6. The elastic clamp 5 stably secures the garment, preventing pulling forces from manual support. The motor 10 drives the transmission belt 6, which in turn moves the sewing table 4 and the elastic clamp 5 holding the garment below the needle 22. Simultaneously, the sewing machine 3 starts, and the needle 22 at its bottom sews the seam of the garment through the sewing groove on the sewing table 4.

[0042] Working principle:

[0043] When the elastic clamp 5 travels parallel to the tabletop 1 with the transmission belt 6, the sensor on the elastic clamp 5 detects the position signal and transmits it to the clutch assembly. After receiving the signal, the clutch control switch 7 in the clutch assembly controls the extension and retraction of the telescopic rod 20. The telescopic rod 20 drives the wrench 16 to rotate around the first rotating shaft 17 through the second rotating shaft 19. The wrench 16 squeezes the clutch wheel 13, and the clutch wheel 13 drives the driven friction wheel 12 away from the transmission friction wheel 11, cutting off the power transmission and stopping the transmission belt 6.

[0044] At this moment, the elastic clamp 5 at the other end of the transmission belt 6 rotates to a position parallel to the table 1. The operator removes the garment that has been sewn from the previous elastic clamp 5 and clamps the new garment to be sewn onto the current elastic clamp 5. Then, the clutch control switch 7 controls the telescopic rod 20 to reset, the spring 14 pushes the clutch wheel 13 to drive the driven friction wheel 12 to re-engage with the transmission friction wheel 11, the power transmission is restored, the transmission belt 6 starts running again, and enters the next sewing process. This cycle is repeated to achieve continuous and efficient anti-stretch sewing of elastic fabric seams.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A garment seam elastic fabric anti-stretch sewing device, comprising a tabletop (1), characterized in that: The desktop (1) is embedded with a first mounting platform (2) and a transmission belt (6). A sewing machine (3) is provided on the first mounting platform (2), and a needle (22) is provided at the bottom of the sewing machine (3). A sewing table (4) is provided directly below the needle (22). The sewing table (4) is located on the transmission belt (6) and has a sewing groove adapted to the needle (22) for sewing. Each end of the transmission belt (6) is equipped with an elastic clamp (5), and both elastic clamps (5) are used to clamp clothing; a motor (10) for driving the transmission belt (6) is provided below the table (1), and a clutch assembly for controlling its start and stop is provided between the motor (10) and the transmission belt (6); A sensor is mounted on the elastic clamp (5), and the sensor is electrically connected to the clutch assembly; When one of the elastic clamps (5) has traveled a distance parallel to the tabletop (1) along the transmission belt (6), the sensor triggers a signal to the clutch assembly, and the transmission belt (6) stops rotating. At this time, the other elastic clamp (5) rotates to a position parallel to the tabletop (1), and the clothing on the previous elastic clamp (5) can be removed and re-clamped on the current elastic clamp (5).

2. The anti-stretch sewing device for elastic fabric seams in garments according to claim 1, characterized in that: The clutch assembly includes a rotating assembly and a driven assembly. The rotating assembly includes the motor (10) and a transmission friction wheel (11). The transmission friction wheel (11) is fixedly connected to the motor (10). The transmission friction wheel (11) is provided with a first friction enhancement surface, which is located on the side of the transmission friction wheel (11) away from the motor (10).

3. The anti-stretch sewing device for elastic fabric seams in garments according to claim 2, characterized in that: The driven component includes a driven friction wheel (12), which has a second friction enhancement surface located on the side of the driven friction wheel (12) close to the transmission friction wheel (11). On the side of the driven friction wheel (12) away from the transmission friction wheel (11), a clutch wheel (13), a spring (14), and a fixed abutment wheel (15) are sequentially provided. The clutch wheel (13) is fixedly connected to the driven friction wheel (12). When the clutch wheel (13) is squeezed, the driven friction wheel (12) moves away from the transmission friction wheel (11).

4. The anti-stretch sewing device for elastic fabric seams in garments according to claim 3, characterized in that: The clutch wheel (13) has a groove in the middle, and a wrench (16) is provided in the groove. The handle of the wrench (16) is hinged to the second mounting platform (18) through the first rotating shaft (17).

5. The anti-stretch sewing device for elastic fabric seams in garments according to claim 4, characterized in that: The end of the handle of the wrench (16) is hinged to the telescopic rod (20) via a second pivot (19).

6. The anti-stretch sewing device for elastic fabric seams in garments according to claim 5, characterized in that: The desktop (1) is provided with a clutch control switch (7), and the telescopic rod (20) is electrically connected to the clutch control switch (7).

7. The anti-stretch sewing device for elastic fabric seams in garments according to claim 6, characterized in that: The desktop (1) is provided with a power switch (8), and the motor (10) is electrically connected to the power switch (8).

8. The anti-stretch sewing device for elastic fabric seams in garments according to claim 7, characterized in that: The desktop (1) is provided with a support frame (21) below it, and the bottom of the support frame (21) is provided with four casters (9).

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