Feeding device for keyhole sewing and method of use thereof

Abstract

This invention discloses a feeding device and method for buttonhole sewing. The device includes a worktable, a buttonhole sewing machine head, and a transport component. The transport component is arranged parallel to the machine head, and a rotating clamping component and a tail clamping component are respectively provided at both ends of the feeding table. The rotating clamping component uses a limiting pillar as a reference and drives the upper and lower pressure plates to rise and rotate synchronously through a lifting and rotating drive source to achieve clamping and angle adjustment of the fabric at the neckline. The tail clamping component cooperates to achieve segmented clamping of the fabric. The method of use includes initialization, fabric clamping, straight feeding and sewing, neckline angle adjustment, buttonhole sewing, and a complete cycle of reset. This invention abandons the traditional single straight feeding mode, provides precise and stable positioning, is suitable for processing irregular necklines and buttonholes, has a scientific structure, flexible adjustment, high degree of automation, and smooth process connection, which can improve processing quality and production efficiency, and is suitable for batch processing of necklines and buttonholes of clothing.

Description

Technical Field

[0001] The present invention relates to the technical field of clothing manufacturing equipment, and particularly relates to a feeding device for buttonhole sewing and its use method. Background Art

[0002] In the clothing sewing equipment industry, buttonhole sewing is a key process in the processing of ready-to-wear products such as shirts and suits. Especially for the buttonholes at the collar of shirts, due to the restrictions of the版型 and sewing process, most of them are oblique non-linear structures. During the processing, the angle of the fabric needs to be adjusted to complete precise buttonhole sewing. At present, the feeding devices supporting the mainstream buttonhole equipment in the market all adopt the traditional fixed linear feeding structure. The pressing component can only achieve vertical lifting clamping and one-way linear feeding. The pressing plate and the cloth feeding table are in a fixed connection form. The whole machine is not equipped with a rotation adjustment mechanism and cannot drive the fabric to rotate around a specified axis to adapt to the processing requirements of the oblique angle buttonholes at the collar.

[0003] During actual mass production, the technical shortcomings of the existing feeding devices are very obvious: such devices can only complete linear buttonhole processing in the same direction and cannot independently handle special processes such as the oblique angle buttonholes at the collar of shirts. They can only rely on operators to manually flip and align the fabric. Manually adjusting the fabric not only has a cumbersome operation process, but also easily causes quality problems such as offset of the buttonhole position, angle deviation, and uneven stitch, directly increasing the defective rate of ready-to-wear products and increasing the loss of production materials. At the same time, manual intervention requires frequent suspension of the equipment operation, interrupting the continuous production rhythm, greatly prolonging the single-station processing cycle, and unable to meet the production requirements of large-scale and high efficiency.

[0004] In addition, the pressing mechanism of the traditional feeding device lacks a rotation limit and synchronous linkage structure. The fabric is prone to slipping, wrinkling, and dislocation during the feeding and shifting processes. When sewing obliquely, it is also prone to equipment failures such as material jamming and sewing material deviation, reducing the operation stability of the equipment. Such devices cannot achieve integrated automatic control of feeding, clamping, and angle adjustment, and the overall automation level is relatively low. This not only increases the manual operation intensity and labor cost, but also does not conform to the development trend of high efficiency, precision, and automation of modern clothing sewing equipment, and is difficult to adapt to the process upgrade and production capacity requirements of current clothing production. Summary of the Invention

[0005] Aiming at the problem that the traditional feeding device cannot achieve angle adjustment and cannot adapt to multi-angle buttonhole processing at the collar, the present invention provides a feeding device for buttonhole sewing with a simple structure, flexible angle adjustment, and high automation degree and its use method.

[0006] This invention provides the following technical solution: a feeding device for buttonhole sewing, comprising a worktable, a buttonhole sewing machine head, and a transport component; both the buttonhole sewing machine head and the transport component are fixedly installed on the worktable, the transport component is arranged parallel to the side of the buttonhole sewing machine head, and both extend along the same length direction; the transport component includes a guide, a transmission component, and a feeding table, the transmission component is slidably assembled on the guide, the feeding table is fixed on the transmission component, and is driven by the transmission component to slide linearly back and forth along the guide, its travel covering the sewing position of the buttonhole sewing machine head; along the length direction of the feeding table, a rotating clamping component is provided at one end near the buttonhole sewing machine head, and a tail clamping component is provided at the other end away from the buttonhole sewing machine head; the rotating clamping component includes a limiting support and a pressing component. The system includes a material plate, an upper pressure plate, a lifting drive source, a lifting plate, and a rotary drive source. A limiting support column is vertically fixed to the feeding table. The lower pressure plate is movably fitted around the limiting support column and limited to rotating only around its axis. The upper pressure plate is movably fitted around the limiting support column and can move up and down along its axis. The upper and lower pressure plates are linked circumferentially by limiting screws. The lifting drive source is fixedly installed on the feeding table, with its output end fixedly connected to the lifting plate. The rotary drive source is mounted on the lifting plate and drives the upper and lower pressure plates to rotate synchronously around the limiting support column, thus adjusting the fabric angle. The tail clamping assembly can cooperate with the rotary clamping assembly to achieve segmented clamping and stable feeding of the fabric.

[0007] In some embodiments, the tail clamping assembly includes a front feeding plate, a pressing cylinder, and a pressing plate. The front feeding plate is fixedly installed on the feeding table, the pressing cylinder is fixedly mounted on the front feeding plate, and the pressing plate is connected to the output end of the pressing cylinder. The pressing cylinder can drive the pressing plate to move up and down, so that the pressing plate and the front feeding plate are aligned and cooperated to realize the clamping and releasing of the tail of the fabric.

[0008] In some embodiments, a connecting rod is fixedly provided on the lifting plate; a first connecting bracket and a second connecting bracket are sequentially connected to the upper end of the upper pressure plate, the second connecting bracket and the connecting rod are hinged by a connecting pin, and the connecting pin and the limiting column are on the same axis; a third connecting bracket is provided on the side wall of the first connecting bracket, and the third connecting bracket is hinged to the driving end of the rotary drive source.

[0009] In some embodiments, the lifting plate is provided with a plurality of hinge mounting holes, and the tail end of the rotary drive source is hinged to the hinge mounting holes by a hinge pin; by switching different hinge mounting holes, the mounting position of the rotary drive source is adjusted, thereby adjusting the rotation angle of the upper pressure plate and the lower pressure plate.

[0010] In some embodiments, the fabric feeding table has a receiving notch, in which the upper pressure plate and the lower pressure plate are received; the outline of the receiving notch is adapted to the upper pressure plate and the lower pressure plate, and its opening is set towards the buttonhole sewing machine head; when the upper pressure plate and the lower pressure plate return to the set origin, the sidewalls of both abut against the inner sidewall of the receiving notch.

[0011] In some embodiments, a limiting frame is fixed on the feeding table. The limiting frame is located behind the lifting drive source, and its extension direction is perpendicular to the moving direction of the feeding table. In the state of setting the origin, the extension end is staggered with the upper pressure plate. After the upper pressure plate and the lower pressure plate are rotated and adjusted synchronously, the extension end is located above the upper pressure plate. The lifting drive source drives the upper pressure plate to rise until it contacts the limiting frame.

[0012] In some embodiments, a connecting plate is installed on the inner wall of the guide member, and a material support plate is installed on the other end of the connecting plate. The length direction of the material support plate is parallel to the moving direction of the feeding table, and the material support plate is located below the inner side of the feeding table.

[0013] In some embodiments, a sensing sensor for sensing the distance to the buttonhole sewing machine head is fixedly installed below the front feed plate, and the sensing direction of the sensing sensor is the moving direction of the feed table.

[0014] In some embodiments, the transport assembly further includes a drive motor, a drive gear, a driven gear, and a synchronous toothed belt; the drive gear and the driven gear are rotatably mounted on both ends of the guide member, and the synchronous toothed belt is wrapped around the outer periphery of the drive gear and the driven gear and meshes with them; the drive motor is fixedly mounted on the worktable, and its output shaft is connected to the drive gear; the transmission member is fixedly connected to the synchronous toothed belt, and the drive motor can drive the synchronous toothed belt to perform forward and reverse cyclic motion through the drive gear, thereby driving the transmission member to slide linearly back and forth along the guide member.

[0015] A method of using a feeding device for buttonhole sewing includes the following steps: S1, Device initialization: Control the feeding device to return to the set origin, the lifting drive source drives the upper pressure plate to rise, control the pressure cylinder to drive the fabric pressure plate to rise, and the rotating clamping assembly and the tail clamping assembly are both in the released state; S2, Fabric clamping: Place the neckline end of the fabric between the upper and lower pressure plates, and place the tail end of the fabric between the fabric pressure plate and the front feeding plate; the lifting drive source drives the lifting plate to descend, causing the upper pressure plate to press down and clamp the neckline end of the fabric; the pressure cylinder drives the fabric pressure plate to press down and clamp the tail end of the fabric; S3, Straight feeding sewing: Control the transport assembly to move the fabric feeding table linearly from a position away from the buttonhole sewing machine head to the stop position before the rotation angle adjustment, simultaneously completing the straight section sewing of the fabric; S4, Neckline angle adjustment: When sewing to the neckline buttonhole position, the pressure cylinder drives the fabric pressure plate to press down. The board rises to release the tail of the fabric; the rotary drive source activates, driving the upper and lower pressure plates to rotate synchronously around the limiting support to a set angle, and the tail of the fabric lands on the support plate; S5, buttonhole sewing: the control transport component moves the fabric feeding table a preset distance closer to the buttonhole sewing machine head, sending the buttonhole area of ​​the fabric to the buttonhole sewing machine head station; after the presser feet of the buttonhole sewing machine head press down to fix the fabric, the lifting drive source drives the upper pressure plate to rise until it contacts the limiting frame; the control transport component moves the fabric feeding table a preset avoidance distance away from the buttonhole sewing machine head, and the buttonhole sewing machine head completes the buttonhole sewing of the neckline; S6, reset cycle: after sewing is completed, the fabric is removed, the lifting drive source drives the upper pressure plate to press down, and the rotary drive source drives the upper and lower pressure plates to rotate back to the initial position; the lifting drive source drives the upper pressure plate to rise again, waiting for the next fabric clamping.

[0016] Compared with the prior art, the advantages of the present invention are as follows:

[0017] I. Precise and stable clamping and positioning, adaptable to buttonhole processing of irregular necklines, solving the pain point of insufficient adaptability of traditional devices. This invention abandons the single linear clamping and feeding mode of traditional buttonhole feeding devices, and adopts a segmented clamping design combining a rotary clamping component and a tail clamping component. This not only achieves stable feeding of the fabric in the straight section, but also accurately adapts to the buttonhole sewing needs of irregular parts such as clothing necklines. Among them, the rotary clamping component is the core clamping and angle adjustment structure. It uses the limiting pillar fixed vertically on the fabric feeding table as the rotation reference. The lower pressure plate is movably sleeved on the outer periphery of the limiting pillar and can only rotate around the axis. The upper pressure plate can be raised and lowered along the axial direction of the limiting pillar. At the same time, the two are linked circumferentially by the limiting screw to ensure that there is no relative misalignment during rotation, effectively avoiding slippage and deviation of the fabric when adjusting the angle. The lifting drive source is driven by the lifting plate. The upper pressure plate rises and falls to securely clamp and release the fabric at the neckline. The rotary drive source, mounted on the lifting plate, works in conjunction with the upper pressure plate to drive the upper and lower pressure plates to rotate synchronously around the limiting support, precisely adjusting the tilt angle of the fabric neckline. This solves the technical bottleneck of traditional devices that can only achieve linear feeding and cannot adapt to buttonhole sewing of irregularly shaped necklines. It can be widely used in buttonhole processing of necklines of different styles and curvatures of clothing. In addition, the fabric feeding table is specially designed with receiving notches that match the contours of the upper and lower pressure plates. The opening of the notches faces the buttonhole sewing machine head. When the upper and lower pressure plates return to the set origin, their side walls abut against the inner side walls of the notches, forming a precise mechanical positioning reference. This further improves the positioning accuracy of fabric clamping and angle adjustment, ensuring the alignment accuracy of buttonhole sewing and avoiding problems such as buttonhole offset and skewing.

[0018] Second, the structure is scientifically and rationally designed, combining adjustment flexibility and sewing stability, which greatly improves the processing quality. The present invention fully considers processing flexibility, stability and convenience in its structural design, and many details are superior to the existing technology. In terms of angle adjustment, the lifting plate has several hinged mounting holes. The tail end of the rotary drive source is hinged to different mounting holes through hinge pins, which can flexibly switch the installation position of the rotary drive source, thereby adjusting the rotation limit angle of the upper and lower pressure plates. It can be adapted to the processing of collar buttonholes of different sizes and curvatures without changing tooling, which greatly improves the versatility and applicability of the equipment. In terms of auxiliary support, a limit frame is fixed on the fabric feeding table. The extension direction of the limit frame is perpendicular to the movement direction of the fabric feeding table. During the buttonhole sewing stage, the lifting drive source drives the upper pressure plate to rise until it contacts the limit frame, forming a mechanical upper limit stop, which effectively prevents the fabric end from curling up or deforming, ensuring the flatness of the fabric during the sewing process. At the same time, a material support plate is installed on the inner wall of the guide component through a connecting plate. The length direction of the material support plate is parallel to the movement direction of the fabric feeding table and is located below the fabric feeding table. When the tail clamping component releases the tail of the fabric, the material support plate can stably support it. To prevent fabric from sagging and wrinkling, the fabric is kept flat at all times, further improving the appearance quality of the buttonhole stitching. In addition, the tail clamping component uses a pressure cylinder to drive the fabric pressure plate to rise and fall, which is aligned with the front feed plate to quickly clamp and release the fabric at the tail. The action response is rapid, and there is a sensor under the front feed plate that can sense the distance to the buttonhole sewing machine head in real time, so as to achieve precise alignment of the feeding station and avoid sewing defects caused by station misalignment, further ensuring the stability of processing quality.

[0019] Third, the invention features a high degree of automation, smooth process connections, and significantly improved production efficiency and equipment usability. It optimizes and upgrades automation design and process connections, greatly reducing manual intervention and improving production efficiency while lowering operational difficulty. The transport component employs a transmission method combining a drive motor, a driving gear, a driven gear, and a synchronous toothed belt. The driving and driven gears are respectively mounted at both ends of the guide, and the synchronous toothed belt is wrapped around and meshes with their outer circumferences. The drive motor is fixed to the worktable and connected to the driving gear. The transmission component is fixed to the synchronous toothed belt. The drive motor drives the synchronous toothed belt in forward and reverse cyclic motion, thereby driving the fabric feeding table to slide linearly back and forth along the guide. The transmission is smooth, and the stroke control is precise. Its travel distance can completely cover the sewing position of the buttonhole sewing machine head, ensuring proper material feeding. The accompanying proprietary operating method enables fully automated operation of the entire process, including device initialization, fabric clamping, linear feeding and sewing, neckline angle adjustment, buttonhole sewing, and reset cycle. The entire process is seamless, with no jamming or fabric tearing: during straight feeding, the tail clamping component and the rotating clamping component clamp the fabric synchronously, ensuring stable feeding; during neckline adjustment, the tail clamping component quickly releases to make way, the rotating clamping component precisely adjusts the angle, the fabric feeding table moves precisely to the sewing station, the buttonhole sewing machine head presser foot fixes the fabric, the rotating clamping component releases and rises to its limit, the fabric feeding table avoids the gap and completes the buttonhole sewing, the process connection logic is rigorous and efficient; at the same time, the equipment adopts a modular design, the buttonhole sewing machine head and the transport component are arranged in parallel in the same direction, with high integration and small space occupation, the lifting drive source and the rotating drive source are independent of each other, with clear division of labor, the actions do not interfere with each other, the operation is smooth and stable, and the modular structure facilitates assembly, inspection and maintenance, reducing the maintenance cost of the equipment, and further improving the practicality and service life of the equipment; compared with traditional manual or semi-automatic feeding devices, this invention can significantly reduce manual operation steps, improve the efficiency and consistency of buttonhole sewing, and is suitable for mass production needs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the rotating clamping assembly of the present invention when it leaves the sewing station;

[0023] Figure 3 This is a schematic diagram of the structure of the rotary clamping assembly of the present invention when it is screwed into the sewing station;

[0024] Figure 4 This is a schematic diagram of the exploded structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 A magnified structural diagram at point A;

[0026] Figure 6 For the present invention Figure 4 A magnified structural diagram at point B;

[0027] Figure 7 This is a partial structural diagram of the bottom of the present invention;

[0028] Figure 8 This is a schematic diagram of the fabric feeding table of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of the transport component of the present invention;

[0030] Figure 10 This is a cross-sectional structural diagram of the transport component of the present invention.

[0031] In the diagram: 1. Workbench; 2. Buttonhole sewing machine head; 3. Transport assembly; 31. Guide component; 32. Transmission component; 33. Fabric feeding table; 331. Accommodation notch; 34. Drive motor; 35. Drive gear; 36. Driven gear; 37. Synchronous toothed belt; 4. Rotary clamping assembly; 41. Limiting support column; 42. Lower pressure plate; 43. Upper pressure plate; 44. Lifting drive source; 45. Rotary drive source; 46. Limiting screw; 47. Lifting plate; 471. Hinge mounting hole; 48. Connecting rod; 49. First connecting bracket; 4010. Second connecting bracket; 4011. Connecting pin; 4012. Third connecting bracket; 4013. Hinge pin; 5. Tail clamping assembly; 51. Front fabric feeding plate; 52. Pressing cylinder; 53. Pressing plate; 6. Limiting frame; 7. Connecting plate; 8. Support plate; 9. Sensor. Detailed Implementation

[0032] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0033] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0035] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0036] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0037] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0038] Please see Figure 1-5As shown in this embodiment: a feeding device for buttonhole sewing includes a worktable 1, a buttonhole sewing machine head 2, and a transport component 3; both the buttonhole sewing machine head 2 and the transport component 3 are fixedly installed on the worktable 1, and the transport component 3 is arranged parallel to the side of the buttonhole sewing machine head 2, and both extend along the same length direction; the transport component 3 includes a guide 31, a transmission component 32, and a feeding table 33, the transmission component 32 is slidably assembled on the guide 31, and the feeding table 33 is fixed on the transmission component 32, and is driven by the transmission component 32 to slide linearly back and forth along the guide 31, the travel of which covers the sewing position of the buttonhole sewing machine head 2; along the length direction of the feeding table 33, a rotating clamping component 4 is provided at one end near the buttonhole sewing machine head 2, and a tail clamping component 5 is provided at the other end away from the buttonhole sewing machine head 2; the rotating clamping component 4 includes a limiting support 41, a lower pressure plate 42, and an upper pressure plate. 43. Lifting drive source 44, lifting plate 47, and rotary drive source 45; the limiting column 41 is vertically fixed on the feeding table 33, the lower pressure plate 42 is movably sleeved on the outer periphery of the limiting column 41 and limited to rotating only around the axis of the limiting column 41, the upper pressure plate 43 is movably sleeved on the outer periphery of the limiting column 41 and can be lifted and lowered along the axis of the limiting column 41; the upper pressure plate 43 and the lower pressure plate 42 are circumferentially linked by the limiting screw 46; the lifting drive source 44 is fixedly installed on the feeding table 33, the output end of the lifting drive source 44 is fixedly connected to the lifting plate 47, the rotary drive source 45 is assembled on the lifting plate 47 and is in transmission cooperation with the upper pressure plate 43, used to drive the upper pressure plate 43 and the lower pressure plate 42 to rotate synchronously around the limiting column 41 to realize the adjustment of the fabric angle; the tail clamping assembly 5 can cooperate with the rotary clamping assembly 4 to realize the segmented clamping and stable feeding of the fabric.

[0039] This device arranges the buttonhole sewing machine head 2 and the transport component 3 in the same direction and parallel. The fabric feeding table 33 achieves high-precision linear reciprocating sliding with the help of the guide component 31 and the transmission component 32. The moving stroke completely covers the sewing station, and the feeding trajectory is regular, which can effectively avoid the deviation and misalignment of the fabric during the conveying process. This ensures the positional accuracy and forming consistency of the buttonhole sewing from the source and reduces the sewing defect rate. The rotating clamping component 4 and the tail clamping component 5 work together to clamp the fabric in sections, which can form stable positioning and tension at both ends of the fabric. This keeps the fabric flat and free from looseness, wrinkles and slippage throughout the sewing process, which significantly improves the flatness of the buttonhole sewing and the quality of the finished product. The rotating clamping component 4 integrates the lifting drive and the rotating drive into one structure. The lifting drive source 44 can drive the upper pressure plate 43 to rise and fall along the axial direction of the limiting column 41, quickly completing the clamping and releasing of the fabric. The loading and unloading operation is convenient and efficient. The rotary drive source 45 can drive the upper pressure plate 43 and the lower pressure plate 42 to rotate synchronously around the limiting support column 41, accurately realizing the adjustable sewing angle of the fabric. It can adapt to the sewing processing needs of buttonholes of different specifications and tilt angles, greatly expanding the application range and versatility of the equipment. The upper and lower pressure plates 42 achieve circumferential linkage through the limiting screws 46. The rotational motion is highly synchronized and the angle adjustment is without deviation. With the dual function of the limiting support column 41 for limiting the rotation of the lower pressure plate 42 and guiding the upper pressure plate 43 axially, the motion structure layout is reasonable, which can effectively avoid component movement jamming and offset failure. The whole machine has a compact and integrated structure. The reciprocating feeding table 33 runs smoothly and responds sensitively, which can meet the needs of continuous buttonhole sewing operations on the production line and effectively improve the overall processing efficiency. At the same time, relying on coaxial positioning and reasonable motion limiting structure, the equipment is not easy to deform or shift during long-term operation, with good operational stability and significantly extended service life.

[0040] In some embodiments, such as Figure 6As shown, the tail clamping assembly 5 includes a front feeding plate 51, a pressing cylinder 52, and a pressing plate 53. The front feeding plate 51 is fixedly installed on the feeding table 33, the pressing cylinder 52 is fixedly installed on the front feeding plate 51, and the pressing plate 53 is connected to the output end of the pressing cylinder 52. The pressing cylinder 52 can drive the pressing plate 53 to move up and down, so that the pressing plate 53 and the front feeding plate 51 are aligned and cooperated vertically to realize the clamping and releasing of the tail of the fabric. It should be noted that the front feeding plate 51 is fixed on the feeding table 33 and can move synchronously with it, with strong overall linkage and stable positioning reference. The pressing cylinder 52 directly drives the pressing plate 53 to move up and down, and the action response is rapid. It operates quickly and smoothly, precisely aligning with the front fabric feeding plate 51 to automatically and reliably clamp and release the fabric tail. Utilizing a pneumatic pressing clamping method, the clamping force is uniform and moderate, firmly clamping the fabric tail to prevent slippage or loosening during feeding, while also avoiding damage to the fabric from hard compression. Simultaneously, it can form a two-way coordinated clamping system with the front rotating clamping component 4, ensuring the fabric to be sewn remains flat and taut throughout the process, further improving the forming accuracy and processing quality of buttonhole sewing. Furthermore, it has fewer components, is easy to assemble, has a low failure rate, and facilitates later maintenance, making it suitable for continuous and automated feeding and sewing operations.

[0041] In some embodiments, such as Figure 5 As shown, a connecting rod 48 is fixedly provided on the lifting plate 47; a first connecting bracket 49 and a second connecting bracket 4010 are sequentially connected to the upper end of the upper pressure plate 43. The second connecting bracket 4010 and the connecting rod 48 are hinged by a connecting pin 4011, and the connecting pin 4011 and the limiting column 41 are on the same axis; a third connecting bracket 4012 is provided on the side wall of the first connecting bracket 49. The third connecting bracket 4012 is hinged to the driving end of the rotary drive source 45. It should be noted that the first connecting bracket 49 and the second connecting bracket 4010 are sequentially arranged in conjunction with the upper pressure plate 43, and the second connecting bracket 4010 is achieved by using the connecting pin 4011. The connecting bracket 4010 is hinged to the connecting rod 48, and the connecting pin 4011 is arranged coaxially with the limiting support column 41; at the same time, a third connecting bracket 4012 is set on the side wall of the first connecting bracket 49. Relying on the transmission form of multiple sets of connecting brackets hinged together, the power transmission is smooth and uniform, the motion transmission error is small, and it can accurately ensure the control accuracy of the rotation angle of the upper pressure plate 43, ensuring that it always rotates synchronously with the lower pressure plate 42; the hinged layout simplifies the transmission structure, shortens the transmission path, and makes the overall structure compact and stable with reasonable force distribution, which can reduce the wear of components and improve the stability and service life of the mechanism for long-term reciprocating rotation adjustment.

[0042] In some embodiments, such as Figure 5As shown, the lifting plate 47 is provided with several hinge mounting holes 471. The tail end of the rotary drive source 45 is hinged to the hinge mounting hole 471 through a hinge pin 4013. By switching different hinge mounting holes 471, the installation position of the rotary drive source 45 can be adjusted, thereby adjusting the rotation angle between the upper pressure plate 43 and the lower pressure plate 42. It should be noted that by arranging multiple hinge mounting holes 471 on the lifting plate 47, the tail end of the rotary drive source 45 can be flexibly hinged to different hinge mounting hole 471 positions through the hinge pin 4013, without replacing parts or making complex structural modifications; only switching the mounting holes is required. The assembly position of the rotary drive source 45 can be quickly changed, thereby precisely adjusting the rotation angle of the upper pressure plate 43 and the lower pressure plate 42. The hole-type mechanical adjustment method provides reliable positioning, clear angle adjustment levels, and high repeatability, adapting to the processing needs of various tilt angle buttonholes and different sewing processes, greatly improving the adaptability and versatility of the device. At the same time, the hinged installation structure makes assembly simple, disassembly and maintenance convenient, and the connection is stable and not easy to loosen during operation. It does not require additional complex adjustment components, and the overall structure is simple and compact, occupies little space, and operates stably and reliably, effectively reducing the probability of mechanism failure.

[0043] In some embodiments, such as Figure 8 As shown, the fabric feeding table 33 has a receiving notch 331, within which the upper pressure plate 43 and the lower pressure plate 42 are housed. The outline of the receiving notch 331 is adapted to the upper pressure plate 43 and the lower pressure plate 42, and its opening faces the buttonhole sewing machine head 2. When the upper pressure plate 43 and the lower pressure plate 42 return to their set origin, their sidewalls abut against the inner sidewall of the receiving notch 331. It should be noted that the receiving notch 331 on the fabric feeding table 33 houses the upper pressure plate 43 and the lower pressure plate 42 as a whole within the notch, and the outline of the receiving notch 331 is adapted to the shape of the two pressure plates, with its opening facing the buttonhole sewing machine head 2. The overall layout is an embedded design. The compact and regular structure can effectively reduce the space occupied by exposed components and avoid motion interference between the rotating clamping component 4 and the buttonhole sewing machine head 2. At the same time, the receiving notch 331 can provide lateral limit and motion guidance for the upper and lower pressure plates 42, and constrain the shaking and displacement of the components. When the upper and lower pressure plates 42 rotate back to the set origin, the mechanical hard limit is achieved by the side wall abutting against the inner side wall of the receiving notch 331, which can accurately lock the initial zero position of rotation. The reset positioning accuracy is high and the repeatability is good, effectively eliminating the deviation of the zero position each time and ensuring the uniformity of the initial posture of the fabric clamping. The structural design of the notch opening facing the sewing machine head facilitates the smooth entry and exit of the fabric into and out of the clamping area, does not obstruct the sewing station, and makes loading and unloading of materials convenient.

[0044] In some embodiments, such as Figure 5As shown, a limiting frame 6 is fixedly installed on the fabric feeding table 33. The limiting frame 6 is located behind the lifting drive source 44, and its extension direction is perpendicular to the moving direction of the fabric feeding table 33. In the set origin state, the extension end is staggered with the upper pressure plate 43. After the upper pressure plate 43 and the lower pressure plate 42 are synchronously rotated and adjusted, the extension end is located above the upper pressure plate 43. The lifting drive source 44 drives the upper pressure plate 43 to rise until it contacts the limiting frame 6. It should be noted that the limiting frame 6 is fixedly installed on the fabric feeding table 33. The limiting frame 6 is arranged behind the lifting drive source 44 and its extension direction is perpendicular to the moving direction of the fabric feeding table 33. The layout is neat and reasonable. In the set origin state, the extension end of the limiting frame 6 is staggered with the upper pressure plate 43, which will not cause motion interference to the initial reset, clamping and rotation of the upper pressure plate 43. After the upper pressure plate 43 and the lower pressure plate 42 are synchronously rotated to complete the fabric angle adjustment, At this time, the upper pressure plate 43 and the lower pressure plate 42 are at the pressure feet, and the extension end of the limit frame 6 is exactly above the upper pressure plate 43. At this time, the lifting drive source 44 drives the upper pressure plate 43 to rise and abut against the limit frame 6, forming a reliable mechanical upper limit structure. This can accurately limit the maximum lifting stroke of the upper pressure plate 43 under the pressure feet, effectively preventing the upper pressure plate 43 from being raised excessively or exceeding the stroke limit, avoiding collisions and deformation damage to parts. Relying on mechanical hard limit to replace electrical stroke sensing limit, the positioning is stable and reliable, with strong anti-interference ability, and is not affected by electrical control signal errors. At the same time, the limit frame 6 is fixedly connected to the feeding table 33 and moves synchronously with the feeding table 33. The limit reference is unified, the structure is rigid, and it is not easy to deviate or deform during long-term operation, reducing the frequency of daily debugging and maintenance. The overall structure is simple and compact, does not occupy additional installation space, and is suitable for the automated and stable operation requirements of the equipment.

[0045] In some embodiments, such as Figure 1As shown, a connecting plate 7 is installed on the inner wall of the guide member 31, and a material support plate 8 is installed on the other end of the connecting plate 7. The length direction of the material support plate 8 is parallel to the moving direction of the feeding table 33. The material support plate 8 is located on the lower inner side of the feeding table 33. It should be noted that the connecting plate 7 is fixedly installed on the inner wall of the guide member 31, and the material support plate 8 is assembled through the connecting plate 7. The material support plate 8 is arranged parallel to the moving direction of the feeding table 33 and is located below the feeding table 33. The overall installation structure is stable and the positioning reference is reliable. The material support plate 8 can provide full-process lower support for the fabric during the feeding process of the feeding table 33, effectively avoiding The fabric hangs and droops in the middle, collapsing and bending, eliminating looseness, wrinkles, and deviation caused by the fabric's own weight. At the same time, the material support plate 8 is hidden at the bottom of the fabric feeding table 33, preventing slippage and interference with the fabric feeding table 33 and surrounding moving parts. The structure is compact and reasonable. In conjunction with the front rotating clamping component 4 and the rear clamping component 5, it forms a 360-degree regular positioning of the fabric from top to bottom and front to back, ensuring that the fabric remains flat and smooth throughout the entire feeding and buttonhole sewing process. This significantly improves the sewing quality and positional accuracy. Moreover, the overall component structure is simple, rigid, and not easily deformed during long-term operation, making maintenance convenient.

[0046] In some embodiments, such as Figures 6-7 As shown, a sensor 9 for sensing the distance between the front feed plate 51 and the buttonhole sewing machine head 2 is fixedly installed below the front feed plate 51. The sensing direction of the sensor 9 is the moving direction of the feed table 33. It should be noted that the sensor 9 is fixedly installed below the front feed plate 51, and the sensor's sensing direction is set along the moving direction of the feed table 33. This allows for real-time and accurate detection of the relative distance and position information between the feed table 33 and the buttonhole sewing machine head 2. Through real-time position sensing feedback, precise closed-loop control of the feed stroke of the feed table 33 can be achieved, accurately matching the sewing worker's position. The machine is stopped at a fixed point, which effectively ensures the positioning accuracy of buttonhole sewing; there is no need for repeated manual alignment and adjustment, which greatly reduces the difficulty of equipment debugging and improves the level of automation of the whole machine; at the same time, the sensor is hidden under the front feed plate 51, which does not occupy the fabric feeding space, will not interfere with the surrounding moving components, and can also reduce the interference of fabric scraps and debris on the sensing area. The sensing and recognition is stable and reliable, and it is not easy to cause false triggers. It can be adapted to continuous feeding sewing operations, effectively avoiding the problems of overfeeding and positioning deviation, and further improving the sewing consistency and finished product qualification rate.

[0047] In some embodiments, such as Figures 9-10As shown, the transport assembly 3 also includes a drive motor 34, a drive gear 35, a driven gear 36, and a synchronous toothed belt 37. The drive gear 35 and the driven gear 36 are rotatably mounted on both ends of the guide member 31, and the synchronous toothed belt 37 is wrapped around the outer periphery of the drive gear 35 and the driven gear 36 and meshes with them. The drive motor 34 is fixedly mounted on the worktable 1, and its output shaft is connected to the drive gear 35. The transmission member 32 is fixedly connected to the synchronous toothed belt 37. The drive motor 34 can drive the synchronous toothed belt 37 to perform forward and reverse cyclic motion through the drive gear 35, thereby driving the transmission member 32 to slide linearly back and forth along the guide member 31. It should be noted that the transport assembly 3 uses the drive motor 34 in conjunction with the drive gear 35, the driven gear 36, and the synchronous toothed belt 37 to form a closed-loop transmission structure. The drive gear 35 and the driven gear 36 are respectively located at both ends of the guide member 31 and mesh with the synchronous toothed belt 37. The transmission system features a well-organized layout and balanced force distribution. The drive motor 34 outputs power through gear meshing, driving the synchronous toothed belt 37 to rotate in both directions. This, in turn, pulls the transmission component 32 and the fabric feeding table 33 along the guide component 31 to achieve smooth linear reciprocating sliding. The transmission response is rapid and the motion synchronization is excellent. The synchronous toothed belt 37 and gear meshing transmission have no relative slippage, resulting in high transmission positioning accuracy and small repeatability error. It can precisely control the feeding stroke and start / stop position of the fabric feeding table 33, effectively ensuring the alignment accuracy of the buttonhole sewing station. At the same time, the synchronous toothed belt 37 transmission has the advantages of buffering and shock absorption, low operating noise, and smooth transmission, which can reduce the vibration of the mechanism and prevent fabric conveying from shaking and deviating. The overall transmission structure is compact and simple, with a short power transmission path. It is easy to disassemble and assemble, and is wear-resistant, fatigue-resistant, and has a strong load-bearing capacity. It is not prone to wear and failure during long-term high-frequency reciprocating operation, has a low failure rate, and requires little maintenance. It can adapt to long-term continuous automated feeding operations, significantly improving the overall machine operation stability and sewing processing efficiency.

[0048] A method of using a feeding device for buttonhole sewing includes the following steps: S1, device initialization: control the feeding device to return to the set origin, the lifting drive source 44 drives the upper pressure plate 43 to rise, control the pressure cylinder 52 to drive the pressure plate 53 to rise, and the rotating clamping assembly 4 and the tail clamping assembly 5 are both in the released state; S2, fabric clamping: place the neckline end of the fabric between the upper pressure plate 43 and the lower pressure plate 42, and place the tail end of the fabric between the pressure plate 53 and the front feeding plate 51; The lifting drive source 44 drives the lifting plate 47 to descend, causing the upper pressure plate 43 to press down and clamp the neckline end of the fabric; the pressure cylinder 52 drives the pressure plate 53 to press down and clamp the tail end of the fabric; S3, linear feeding sewing: the control transport component 3 drives the feeding table 33 to move linearly from a position away from the sewing position of the buttonhole sewing machine head 2 to the stop position before the rotation angle adjustment, and simultaneously completes the sewing of the straight section of the fabric; S4, neckline angle adjustment: when sewing to the neckline buttonhole position, the pressure cylinder 52 drives the pressure plate 53 The fabric tail is released as it rises; the rotary drive source 45 actuates, driving the upper pressure plate 43 and lower pressure plate 42 to rotate synchronously around the limiting support 41 to a set angle, and the fabric tail lands on the support plate 8; S5, buttonhole sewing: the control transport component 3 drives the fabric feeding table 33 to move a preset distance towards the buttonhole sewing machine head 2, sending the fabric neckline buttonhole area to the buttonhole sewing machine head 2 station; after the presser feet of the buttonhole sewing machine head 2 press down to fix the fabric, the lifting drive source 44 drives the upper pressure plate 43 to move. The fabric rises to contact the limit frame 6; the control transport component 3 drives the fabric feeding table 33 to move away from the buttonhole sewing machine head 2 by a preset avoidance distance, and the buttonhole sewing machine head 2 completes the neckline buttonhole sewing; S6, reset cycle: after sewing is completed, the fabric is removed, the lifting drive source 44 drives the upper pressure plate 43 to press down, and the rotation drive source 45 drives the upper pressure plate 43 and the lower pressure plate 42 to rotate back to the initial position; the lifting drive source 44 drives the upper pressure plate 43 to rise again, waiting for the next fabric clamping.

[0049] Through a complete process of device initialization and reset, step-by-step clamping of fabric at both ends, basic sewing with straight-line feeding, tail release in conjunction with neckline angle adjustment, precise alignment and buttonhole sewing at the workstation, and automatic reset cycle operation, the entire process of fabric buttonhole sewing is automated. First, the fabric is clamped as a whole to complete the straight-line sewing, then the tail is released, and the tail of the fabric is supported by the material support plate 8 for angle adjustment. This avoids fabric pulling and deformation, wrinkling and displacement during angle adjustment, ensuring precise and controllable adjustment of the neckline buttonhole angle. During the sewing workstation operation, the fabric is fixed using the presser foot of the sewing machine head, and then aligned with the limit frame 6. The pressure plate 43 is positioned at a high level, and the fabric feeding table 33 is controlled to make slight adjustments, effectively avoiding interference between moving parts and the sewing machine head, ensuring safe and smooth sewing operations. The entire process adopts mechanical and electrical control linkage, with orderly connection between each process and good positioning repeatability, eliminating the need for frequent manual alignment adjustments and significantly reducing the intensity of manual operation. At the same time, the operation process can be repeated, adapting to the standardized sewing production of collar buttonholes for mass-produced garments, effectively improving processing efficiency and product sewing consistency. It has strong process adaptability and can meet the standardized sewing processing needs of collar buttonholes with different inclination angles and specifications.

[0050] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0051] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A feeding device for buttonhole sewing, comprising a worktable (1), a buttonhole sewing machine head (2), and a transport component (3); the buttonhole sewing machine head (2) and the transport component (3) are both fixedly installed on the worktable (1), the transport component (3) is arranged parallel to the side of the buttonhole sewing machine head (2), and both extend along the same length direction; characterized in that: The transport component (3) includes a guide (31), a transmission component (32), and a feed table (33). The transmission component (32) is slidably mounted on the guide (31), and the feed table (33) is fixed on the transmission component (32). Driven by the transmission component (32), the feed table slides back and forth in a straight line along the guide (31), and its travel distance covers the sewing station of the buttonhole sewing machine head (2). Along the length direction of the feed table (33), a rotating clamping component (4) is provided at one end near the buttonhole sewing machine head (2), and a tail clamping component (5) is provided at the other end away from the buttonhole sewing machine head (2). The rotating clamping assembly (4) includes a limiting support column (41), a lower pressure plate (42), an upper pressure plate (43), a lifting drive source (44), a lifting plate (47), and a rotating drive source (45). The limiting support column (41) is vertically fixed on the feeding table (33). The lower pressure plate (42) is movably sleeved on the outer periphery of the limiting support column (41) and is limited to rotating only around the axis of the limiting support column (41). The upper pressure plate (43) is movably sleeved on the outer periphery of the limiting support column (41) and can rotate along the limiting support column (41). Axial lifting; the upper pressure plate (43) and the lower pressure plate (42) are linked in a circumferential direction by a limiting screw (46); the lifting drive source (44) is fixedly installed on the feeding table (33), the output end of the lifting drive source (44) is fixedly connected to the lifting plate (47), the rotary drive source (45) is assembled on the lifting plate (47) and is in transmission cooperation with the upper pressure plate (43), and is used to drive the upper pressure plate (43) and the lower pressure plate (42) to rotate synchronously around the limiting support (41) to realize the adjustment of the fabric angle; The tail clamping component (5) can work with the rotating clamping component (4) to achieve segmented clamping and stable feeding of the fabric.

2. The feeding device for buttonhole sewing according to claim 1, characterized in that: The tail clamping assembly (5) includes a front feeding plate (51), a pressing cylinder (52), and a pressing plate (53). The front feeding plate (51) is fixedly installed on the feeding table (33), the pressing cylinder (52) is fixedly installed on the front feeding plate (51), and the pressing plate (53) is connected to the output end of the pressing cylinder (52). The pressing cylinder (52) can drive the pressing plate (53) to move up and down, so that the pressing plate (53) and the front feeding plate (51) are aligned and cooperated to realize the clamping and releasing of the tail of the fabric.

3. The feeding device for buttonhole sewing according to claim 1, characterized in that: A connecting rod (48) is fixedly provided on the lifting plate (47); a first connecting bracket (49) and a second connecting bracket (4010) are sequentially connected to the upper end of the upper pressure plate (43). The second connecting bracket (4010) and the connecting rod (48) are hinged by a connecting pin (4011), and the connecting pin (4011) and the limiting support (41) are on the same axis; a third connecting bracket (4012) is provided on the side wall of the first connecting bracket (49), and the third connecting bracket (4012) is hinged to the driving end of the rotary drive source (45).

4. The feeding device for buttonhole sewing according to claim 3, characterized in that: The lifting plate (47) is provided with a plurality of hinge mounting holes (471), and the tail end of the rotary drive source (45) is hinged to the hinge mounting holes (471) by a hinge pin (4013); by switching different hinge mounting holes (471) to adjust the installation position of the rotary drive source (45), the rotation angle of the upper pressure plate (43) and the lower pressure plate (42) can be adjusted.

5. The feeding device for buttonhole sewing according to claim 1, characterized in that: The fabric feeding table (33) has a receiving notch (331), and the upper pressure plate (43) and the lower pressure plate (42) are housed in the receiving notch (331). The outline of the receiving notch (331) is adapted to the upper pressure plate (43) and the lower pressure plate (42), and its opening is set towards the buttonhole sewing machine head (2). When the upper pressure plate (43) and the lower pressure plate (42) return to the set origin, the side walls of both abut against the inner side wall of the receiving notch (331).

6. The feeding device for buttonhole sewing according to claim 1, characterized in that: A limiting frame (6) is fixed on the fabric feeding table (33). The limiting frame (6) is located behind the lifting drive source (44), and its extension direction is perpendicular to the moving direction of the fabric feeding table (33). In the state of setting the origin, the extension end is staggered with the upper pressure plate (43). After the upper pressure plate (43) and the lower pressure plate (42) are rotated and adjusted synchronously, the extension end is located above the upper pressure plate (43). The lifting drive source (44) drives the upper pressure plate (43) to rise until it contacts the limiting frame (6).

7. A feeding device for buttonhole sewing according to claim 1, characterized in that: A connecting plate (7) is installed on the inner wall of the guide (31), and a material support plate (8) is installed on the other end of the connecting plate (7). The length direction of the material support plate (8) is parallel to the moving direction of the feeding table (33), and the material support plate (8) is located on the lower inner side of the feeding table (33).

8. A feeding device for buttonhole sewing according to claim 2, characterized in that: A sensing sensor (9) for sensing the distance to the buttonhole sewing machine head (2) is fixedly installed below the front feed plate (51). The sensing direction of the sensing sensor (9) is the moving direction of the feed table (33).

9. A feeding device for buttonhole sewing according to claim 1, characterized in that: The transport component (3) also includes a drive motor (34), a drive gear (35), a driven gear (36), and a synchronous toothed belt (37); the drive gear (35) and the driven gear (36) are rotatably mounted on both ends of the guide member (31), and the synchronous toothed belt (37) is wrapped around the outer periphery of the drive gear (35) and the driven gear (36) and meshes with them; the drive motor (34) is fixedly mounted on the worktable (1), and its output shaft is connected to the drive gear (35); the transmission member (32) is fixedly connected to the synchronous toothed belt (37), and the drive motor (34) can drive the synchronous toothed belt (37) to perform forward and reverse cyclic motion through the drive gear (35), thereby driving the transmission member (32) to slide linearly back and forth along the guide member (31).

10. A method of using a feeding device for buttonhole sewing, applied to the feeding device for buttonhole sewing according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Device initialization: Control the feeding device to return to the set origin, the lifting drive source (44) drives the upper pressure plate (43) to rise, control the pressure cylinder (52) to drive the pressure plate to rise, and the rotating clamping assembly (4) and the tail clamping assembly (5) are both in the released state. S2, Fabric clamping: Place the neckline end of the fabric between the upper pressure plate (43) and the lower pressure plate (42), and place the tail end of the fabric between the pressing plate and the front feeding plate (51); the lifting drive source (44) drives the lifting plate (47) to descend, causing the upper pressure plate (43) to press down and clamp the neckline end of the fabric; the pressing cylinder (52) drives the pressing plate to press down and clamp the tail end of the fabric. S3, Straight-line feeding and sewing: Control the transport component (3) to drive the fabric feeding table (33) to move in a straight line from the position away from the sewing position of the buttonhole sewing machine head (2) to the stop position before the rotation angle adjustment, and simultaneously complete the sewing of the straight section of the fabric; S4. Neckline angle adjustment: When sewing to the neckline buttonhole position, the pressing cylinder (52) drives the pressing plate to rise and release the tail of the fabric; the rotary drive source (45) is activated, driving the upper pressing plate (43) and the lower pressing plate (42) to rotate synchronously around the limiting support (41) to the set angle, and the tail of the fabric falls on the support plate (8); S5, Buttonhole Sewing: Control the transport component (3) to move the fabric feeding table (33) a preset distance closer to the buttonhole sewing machine head (2), and send the buttonhole area of ​​the fabric neckline to the buttonhole sewing machine head (2) station; after the presser foot of the buttonhole sewing machine head (2) presses down to fix the fabric, the lifting drive source (44) drives the upper pressure plate (43) to rise to contact the limit frame (6); control the transport component (3) to move the fabric feeding table (33) a preset avoidance distance away from the buttonhole sewing machine head (2), and the buttonhole sewing machine head (2) completes the buttonhole sewing of the neckline; S6. Reset Cycle: After sewing is completed, the fabric is removed. The lifting drive source (44) drives the upper pressure plate (43) to press down, and the rotation drive source (45) drives the upper pressure plate (43) and the lower pressure plate (42) to rotate back to the initial position. The lifting drive source (44) drives the upper pressure plate (43) to rise again, waiting for the next fabric clamping.

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