Feeding device for cloth processing of double-edge automatic hemming machine

Abstract

The invention discloses a feeding device for cloth processing of an automatic double-edge hemming machine, which realizes accurate control of cloth tension and automatic edge processing through an innovative tension adjusting system and an automatic folding and compacting system. The feeding device for cloth processing of the double-edge automatic hemming machine comprises a machine table top and unprocessed cloth, a cloth tension structure is arranged on one side of the machine table top, a double-edge pressing structure is arranged in the middle of the machine table top, and a double-edge sewing structure is arranged on the other side of the machine table top; according to the device, a roller system capable of adjusting the height of a pressing plate is adopted and matched with an anti-dislocation deviation rectifying wheel, and it is guaranteed that the tension of cloth is stable in the conveying process; meanwhile, by means of the contraction conveying channel and the U-shaped iron sheet edge pressing device in a special shape, edge hair on the two sides of the cloth is automatically folded and compacted, rough selvedges are prevented from being exposed and dislocated, and the hemming quality is improved.

Description

Technical Field

[0001] This invention relates to the field of sewing machinery technology, specifically to a feeding device for fabric processing in a double-sided automatic sewing machine. Background Technology

[0002] This invention belongs to the field of textile machinery technology, specifically relating to a fabric feeding device for a double-sided automatic sewing machine. It is suitable for double-sided sewing processing of various textile fabrics, and can realize automatic fabric feeding, tension adjustment and edge treatment, improve sewing quality and reduce scrap rate. This invention is particularly suitable for the processing of textiles such as home textiles and clothing fabrics that require double-sided sewing processing.

[0003] In the textile processing industry, double-sided automatic sewing machines are important pieces of equipment used to sew the two edges of fabric together, resulting in neat, aesthetically pleasing edges that are less prone to unraveling. However, existing double-sided automatic sewing machine feeding devices have several shortcomings:

[0004] 1. Tension Control Issues: Traditional feeding devices typically use fixed roller spacing or simple cylinder adjustment, which cannot precisely control fabric tension. This leads to fabric slack or stretching deformation during transport, especially noticeable when the fabric is wide or thin. This not only affects the quality of the seam but may also cause holes or wrinkles on the fabric edges, increasing the scrap rate. Furthermore, whether the rollers are connected to the support or the belt drive wheel, they require a shaft as a connecting part. The shaft needs to be longer than the roller, and the limiting bushing can loosen. Therefore, after prolonged operation, the rollers will slightly shift horizontally along the shaft, causing fabric shift. This slight shift has little impact on fabric cutting, but it has a significant impact on the operation of sewing machines with narrow working ranges. In addition, prolonged contact and friction between the rollers and fabric can also generate heat.

[0005] 2. Insufficient edge finishing: Traditional feeding devices often only guide the fabric edge to the seam position, failing to effectively address the issue of raw edges. During the sewing process, the raw edges are prone to protrusion or misalignment, resulting in uneven seams, burrs, and even broken seams.

[0006] 3. Poor adaptability: Traditional feeding devices are not adaptable to fabrics of different widths. Each time the fabric is changed, complex adjustments are required, which increases operation time and reduces production efficiency.

[0007] To address the aforementioned issues, several improvements have been proposed. For example, Chinese patent CN209958060U discloses a fabric opening device that uses a spiral structure on an opening roller to open the fabric edges, preventing fabric width shrinkage. However, during operation, friction occurs between the opening roller and the fabric, causing rapid localized heating and potentially affecting fabric quality. Furthermore, this device does not solve the problems of uneven fabric tension and edge fraying.

[0008] Therefore, there is an urgent need for a double-sided automatic sewing machine feeding device that can accurately control fabric tension, effectively handle edge fraying, has a simple structure, and is easy to maintain. Summary of the Invention

[0009] The purpose of this invention is to provide a feeding device for fabric processing in a double-sided automatic sewing machine, so as to solve the problems mentioned in the background art.

[0010] The technical solution of the present invention is: a feeding device for fabric processing of a double-sided automatic sewing machine, comprising a machine table and unprocessed fabric, wherein a fabric tension structure is provided on one side of the machine table, a double-sided pressing structure is provided in the middle of the machine table, and a double-sided sewing structure is provided on the other side of the machine table.

[0011] The fabric tension structure includes a first rotary motor, a first telescopic motor, an arc-shaped pressure plate, a second rotary motor, a first pressure roller, a second pressure roller, an anti-misalignment correction roller, and two sets of transmission components. The first rotary motor drives the first telescopic motor to move up and down through the first set of transmission components. The first telescopic motor drives the arc-shaped pressure plate to move left and right, and the arc-shaped pressure plate is in contact with the unprocessed fabric. The anti-misalignment correction roller and the first pressure roller mesh with the second pressure roller. The second rotary motor drives the first pressure roller and the second pressure roller to rotate through the second set of transmission components.

[0012] The double-sided pressing structure includes a third rotary motor, a bidirectional threaded rod, a movable nut, an equilateral triangle U-shaped pressing device, an oblique triangle U-shaped pressing device, a manual pressing handle, and a pressing plate. The third rotary motor drives the movable nuts on both sides to move relative to each other through the rotation of the bidirectional threaded rod. The unprocessed fabric passes through the equilateral triangle U-shaped pressing device and the oblique triangle U-shaped pressing device, and the manual pressing handle drives the pressing plate to buckle inward through the linkage component and press it against the edge of the unprocessed fabric.

[0013] Furthermore, the fabric tension structure also includes a support frame, which is fixed to the machine table. The first rotary motor is installed inside the support frame. The output end of the first rotary motor is connected to a first belt of a first set of transmission components. A first pulley is connected to the side of the first belt away from the first rotary motor. A transmission screw is connected to the bottom end of the first pulley. A transmission nut passes through the bottom end of the transmission screw, and the transmission screw and the transmission nut are driven by a thread. A special-shaped bracket is installed at the bottom end of the transmission nut, and a limit slide rail is installed on the side of the special-shaped bracket near the support frame.

[0014] Furthermore, a first telescopic motor is installed at the end of the irregular bracket away from the transmission nut, and the output end of the first telescopic motor is connected to the arc-shaped pressure plate. The top of the arc-shaped pressure plate is arc-shaped on the side near the unprocessed fabric.

[0015] The irregular bracket has a feeding port at its bottom end near the first telescopic motor, through which unprocessed fabric passes. A side distance detection device is installed on one side of the top of the feeding port.

[0016] Furthermore, a movable turntable is installed at the top of the support frame, and the unprocessed fabric is in contact with the movable turntable;

[0017] The second rotary motor is installed in the middle of the inside of the support frame, and the output end of the second rotary motor is connected to a second pulley. The surface of the second pulley is provided with a second belt. A third pulley is installed on one side of the second pulley, and a fourth pulley is installed at the bottom of the second pulley. The fourth pulley, the third pulley and the second pulley are driven by the second belt.

[0018] The third pulley is connected to the first pressure wheel, and the fourth pulley is connected to the second pressure wheel.

[0019] Furthermore, the support frame has limit through grooves installed on both sides of its bottom end, and the anti-misalignment correction wheel is connected to the limit through grooves on both sides. The anti-misalignment correction wheel is fitted with elastic hooks on both sides, and the end of the elastic hook away from the anti-misalignment correction wheel is connected to the support frame.

[0020] Furthermore, the double-sided pressing structure also includes a first magnetic slide rail, which is connected to the machine table. A first magnetic slider is installed at the top of the first magnetic slide rail, a support side plate is installed at the top of the first magnetic slider, and an edge-binding plate is installed at the top of the support side plate.

[0021] A third rotary motor is installed on the side of the binding disc closest to the unprocessed fabric, and a bidirectional threaded rod is installed at the output end of the third rotary motor. Movable nuts pass through both sides of the bidirectional threaded rod, and the movable nuts and the bidirectional threaded rod are driven by threads. Three sets of auxiliary wheels are installed at the top of the movable nuts.

[0022] A shrinkable triangular plate is installed on the support side plate near the unprocessed fabric, and the shrinkable triangular plate has a groove that is deeper than the auxiliary wheel near the auxiliary wheel.

[0023] Furthermore, a first magnetic slide is installed on the side of the support side plate away from the fabric tension structure, and an equilateral triangular U-shaped edge presser is installed on the top of the first magnetic slide. A second magnetic slide is installed on one side of the first magnetic slide, and an oblique triangular U-shaped edge presser is installed on the top of the second magnetic slide.

[0024] Furthermore, a third magnetic slide is installed on one side of the second magnetic slide, and an L-shaped base is installed on the top of the third magnetic slide. A first hinge is hinged to one side of the L-shaped base, and a manual pressure handle is hinged to the top of the first hinge. A flip point is provided at the top of the L-shaped base, and an L-shaped connector is hinged to the L-shaped base through the flip point. The top of the L-shaped connector is hinged to one side of the manual pressure handle, and a pressure plate is installed at the bottom of the L-shaped connector.

[0025] Furthermore, the double-sided sewing structure includes a sewing table, and an edge-sealing sewing machine is installed on one side of the sewing table. A fabric holding plate is installed at the bottom of the edge-sealing sewing machine. A lifting rubber block is provided in the middle of the bottom end of the sewing table near the unprocessed fabric. A thread-breaking resistance wheel is installed on the side of the sewing table near the unprocessed fabric, and a protective cover is installed on the top of the thread-breaking resistance wheel. The unprocessed fabric passes between the thread-breaking resistance wheel and the protective cover.

[0026] The unprocessed fabric has raw edges on both sides.

[0027] This invention provides an improved feeding device for fabric processing in a double-sided automatic sewing machine, which has the following improvements and advantages compared with the prior art:

[0028] Innovation Point 1: Fabric tension is adjusted by regulating the distance between the pressure plate and rollers. The height and horizontal position of the pressure plate are adjustable. The fabric is passed around the two sets of rollers on the side and bottom. The position of the pressure plate is adjusted, and then the pressure plate is controlled to press against the fabric, thus controlling the pressure of the rollers on the fabric. This facilitates the stretching of the fabric, which has two effects: one is to loosen the fabric when it is too tight due to shrinkage, and the other is to allow the fabric to unroll and be stored in rolls. Additionally, if the fabric loosens due to insufficient tension on the rollers, adjusting the pressure plate in the opposite direction reduces the supporting force and re-tightens the fabric. Simultaneously, an innovative anti-misalignment correction wheel is designed. This wheel engages with the rollers through a spring compensation mechanism. When the roller spacing shifts due to changes in fabric tension, the spring force automatically adjusts the engagement tightness, ensuring that the two sets of rollers remain aligned during adjustment and preventing fabric shifting caused by misalignment.

[0029] Innovation Point 2: By contracting the transport channel, the fabric is pushed inward on both sides, causing it to bulge. Then, a U-shaped iron edge presser (equilateral triangle) and a gradually contracting U-shaped iron edge presser smoothly fold the bulging edges, pressing the fabric edges firmly to prevent raw edges from protruding or misaligning, which could lead to seam errors. Furthermore, the system uses a magnetic slide control. The operating table uses current signals to control an electromagnet to attract an iron plate, achieving precise locking of the edge presser position. Because the gradually contracting U-shaped iron edge presser and manual pressing plate need to be closer to the fabric edge, it better conforms to the logic of folding and pressing the raw edges. Simultaneously, the screw slide can adjust the distance between the edge presser and the fabric edge according to the fabric width, adapting to fabrics of different widths.

[0030] In addition, when the conveyor channel is contracted, the auxiliary wheels on both sides of the fabric are controlled by the bidirectional thread to move closer to the fabric at the same time, so that the two sides of the fabric can bulge more smoothly. Because rolling friction has less friction and faster speed than sliding friction, the advantages of rolling friction are utilized to make the two sides of the fabric bulge more smoothly, improving processing efficiency. The position of the auxiliary wheels can also be adjusted according to the width of the fabric. Attached Figure Description

[0031] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a schematic diagram of the first three-dimensional appearance structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the second three-dimensional appearance structure of the present invention;

[0034] Figure 3 This is a first schematic diagram of the fabric tension structure of the present invention;

[0035] Figure 4 This is a second schematic diagram of the fabric tension structure of the present invention;

[0036] Figure 5 This is a third schematic diagram of the fabric tension structure of the present invention;

[0037] Figure 6 This is an exploded schematic diagram of the fabric tension structure of the present invention;

[0038] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point A in the middle;

[0039] Figure 8 For the present invention Figure 6 Enlarged structural diagram at point B;

[0040] Figure 9 This is a first schematic diagram of the double-sided pressing structure of the present invention;

[0041] Figure 10 This is an enlarged schematic diagram of the structure at the auxiliary wheel of the present invention;

[0042] Figure 11 This is a front view schematic diagram of the structure at the auxiliary wheel of the present invention;

[0043] Figure 12 This is a second schematic diagram of the double-sided pressing structure of the present invention;

[0044] Figure 13 For the present invention Figure 12 Enlarged structural diagram at point C;

[0045] Figure 14 This is a top view of the double-sided pressing structure of the present invention;

[0046] Figure 15 This is a first simulated schematic diagram of the edge presser and unprocessed fabric of the present invention;

[0047] Figure 16 This is a first schematic diagram of the multiple sets of edge clamps of the present invention;

[0048] Figure 17 This is a top view schematic diagram of the multiple sets of edge clamps of the present invention;

[0049] Figure 18 This is a second simulated schematic diagram of the edge presser and unprocessed fabric of the present invention;

[0050] Figure 19 This is a third simulation diagram of the edge presser and unprocessed fabric of the present invention;

[0051] Figure 20 This is a first schematic diagram of the double-sided sewing structure of the present invention;

[0052] Figure 21 This is a second schematic diagram of the double-sided sewing structure of the present invention.

[0053] Explanation of reference numerals in the attached drawings: 1. Machine table; 2. Fabric tension structure; 201. Support frame; 202. Movable turntable; 203. Unprocessed fabric; 204. First rotary motor; 205. First belt; 206. First pulley; 207. Transmission nut; 208. Limiting slide rail; 209. Irregular bracket; 210. First telescopic motor; 211. Arc-shaped pressure plate; 212. Second rotary motor; 213. Second pulley; 214. Second belt; 215. Third pulley; 216. Fourth pulley; 217. First pressure roller; 218. Second pressure roller; 219. Anti-misalignment and correction roller; 220. Limiting through groove; 221. Elastic hook; 222. Transmission screw; 223. Edge distance detection device; 224. Feed inlet; 3. Double-sided pressing structure; 301. 302. First magnetic slide rail; 303. First magnetic slider; 304. Support side plate; 305. Binding plate; 306. Third rotary motor; 307. Two-way threaded rod; 308. Movable nut; 309. Auxiliary wheel; 310. Retractable triangle plate; 311. First magnetic slide table; 312. Second magnetic slide table; 313. Third magnetic slide table; 314. Equilateral triangle U-shaped edge presser; 315. Oblique triangle U-shaped edge presser; 316. L-shaped base; 317. First hinge; 318. Manual press handle; 319. L-shaped connector; 320. Flipping point; 4. Edge pressing plate; 501. Fabric raw edge; 502. Double-sided sewing structure; 503. Sewing table; 504. Edge sealing sewing machine; 505. Fabric holding plate; 506. Lifting rubber block; 507. Thread breakage resistance wheel; 508. Protective cover. Detailed Implementation

[0054] The following will be combined with the appendix Figures 1 to 21 This invention will be described in detail, and the technical solutions in the embodiments of this invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0055] The present invention provides a feeding device for fabric processing of a double-sided automatic sewing machine by means of improvements, including a machine table 1 and unprocessed fabric 203. A fabric tension structure 2 is provided on one side of the machine table 1, a double-sided pressing structure 3 is provided in the middle of the machine table 1, and a double-sided sewing structure 5 is provided on the other side of the machine table 1.

[0056] The fabric tension structure 2 includes a first rotary motor 204, a first telescopic motor 210, an arc-shaped pressure plate 211, a second rotary motor 212, a first pressure roller 217, a second pressure roller 218, an anti-misalignment correction roller 219, and two sets of transmission components. The first rotary motor 204 drives the first telescopic motor 210 to move up and down through the first set of transmission components. The first telescopic motor 210 drives the arc-shaped pressure plate 211 to move left and right. The arc-shaped pressure plate 211 and the unprocessed fabric 203 are in contact. The anti-misalignment correction roller 219 and the first pressure roller 217 mesh with the second pressure roller 218. The second rotary motor 212 drives the first pressure roller 217 and the second pressure roller 218 to rotate through the second set of transmission components. During the tension adjustment stage, the unprocessed fabric 203 passes around the two sets of rollers, the first pressure roller 217 and the second pressure roller 218, on the side and bottom.

[0057] The fabric tension structure 2 also includes a support frame 201, which is fixed to the machine table 1. A first rotary motor 204 is installed inside the support frame 201. The output end of the first rotary motor 204 is connected to a first belt 205 of a first set of transmission components. A first pulley 206 is connected to the side of the first belt 205 away from the first rotary motor 204. A transmission screw 222 is connected to the bottom end of the first pulley 206. A transmission nut 207 passes through the bottom end of the transmission screw 222. The transmission screw 222 and the transmission nut 207 are driven by a thread. A special-shaped bracket 209 is installed at the bottom end of the transmission nut 207. A limit slide rail 208 is installed on the side of the special-shaped bracket 209 near the support frame 201. When the first rotary motor 204 is started, the special-shaped bracket 209 is moved up and down through the first set of transmission components, thereby moving the arc-shaped pressure plate 211 up and down to adjust the position of the pressure plate and control the pressure of the roller on the fabric.

[0058] The end of the irregular bracket 209 away from the transmission nut 207 is equipped with a first telescopic motor 210, and the output end of the first telescopic motor 210 is connected to the arc-shaped pressure plate 211. The top of the arc-shaped pressure plate 211 is arc-shaped on the side near the unprocessed fabric 203. By starting the first telescopic motor 210, the arc-shaped pressure plate 211 is controlled to move closer to the unprocessed fabric 203 to adjust the position of the pressure plate, thereby controlling the pressure of the roller on the fabric and further adjusting the tension of the unprocessed fabric 203 to make it open.

[0059] Adjusting the fabric tension using a pressure plate that can move up, down, left, and right is more stable than adjusting the position of rollers, because rollers are large and heavy, and require a transmission structure on one side for rotation, making movement more troublesome.

[0060] The bottom end of the irregular bracket 209 near the first telescopic motor 210 is provided with a feeding port 224, and the unprocessed fabric 203 passes through the feeding port 224. During the feeding stage, the unprocessed fabric 203 enters the device through the feeding port 224 at the bottom of the arc-shaped pressure plate 211 at the feeding end. An edge distance detection device 223 is installed on one side of the top of the feeding port 224. The edge distance detection device 223 detects the edge position of the fabric and provides a basis for subsequent adjustments. The edge distance information is transmitted to the operating table through the control system to prompt the operator to make necessary adjustments.

[0061] A movable turntable 202 is installed at the top of the support frame 201, and the unprocessed fabric 203 is in contact with the movable turntable 202.

[0062] The second rotary motor 212 is installed in the middle of the support frame 201, and the output end of the second rotary motor 212 is connected to the second pulley 213. The surface of the second pulley 213 is provided with a second belt 214. A third pulley 215 is installed on one side of the second pulley 213, and a fourth pulley 216 is installed at the bottom end of the second pulley 213. The fourth pulley 216, the third pulley 215 and the second pulley 213 are driven by the second belt 214.

[0063] The third pulley 215 is connected to the first pressure wheel 217, and the fourth pulley 216 is connected to the second pressure wheel 218;

[0064] Limiting through grooves 220 are installed on both sides of the bottom end of the support frame 201. The two sides of the anti-misalignment correction wheel 219 are connected to the limiting through grooves 220. Elastic hooks 221 are sleeved on both sides of the anti-misalignment correction wheel 219, and the end of the elastic hook 221 away from the anti-misalignment correction wheel 219 is connected to the support frame 201. The anti-misalignment correction wheel 219 engages with the first pressure wheel 217 and the second pressure wheel 218 through the spring compensation mechanism elastic hook 221 to ensure the stability of the roller spacing. The rollers are driven to rotate by starting the second rotary motor 212 through the second set of transmission components. The surfaces of the first pressure wheel 217 and the second pressure wheel 218 are concave and convex, which has two effects: first, to avoid heat generation from friction with the fabric for a long time; second, to facilitate engagement with the anti-misalignment correction wheel 219.

[0065] The double-sided pressing structure 3 includes a third rotary motor 305, a bidirectional threaded rod 306, a movable nut 307, an equilateral triangle U-shaped pressing device 313, an oblique triangle U-shaped pressing device 314, a manual pressing handle 317, and a pressing plate 320. The third rotary motor 305 rotates through the bidirectional threaded rod 306 to drive the movable nuts 307 on both sides to move relative to each other. The unprocessed fabric 203 passes through the equilateral triangle U-shaped pressing device 313 and the oblique triangle U-shaped pressing device 314. The bulging edge of the fabric passes through the equilateral triangle U-shaped pressing device 313, and the edge is gathered up. Then the edge of the fabric with the gathered edge continues to pass through the gradually shrinking oblique triangle U-shaped pressing device 314 and is gradually flattened. The manual pressing handle 317 drives the pressing plate 320 to buckle inward through the linkage component and presses it against the edge of the unprocessed fabric 203.

[0066] The double-sided pressing structure 3 also includes a first magnetic slide rail 301, which is connected to the machine table 1. A first magnetic slider 302 is installed at the top of the first magnetic slide rail 301, a support side plate 303 is installed at the top of the first magnetic slider 302, and an edge-binding plate 304 is installed at the top of the support side plate 303.

[0067] The position of the edge presser is controlled by three sets of magnetic slides to ensure precise contact with the edge of the fabric. In addition, the screw slide can adjust the distance between the edge presser and the edge according to the width of the fabric to adapt to different widths of fabric.

[0068] A third rotary motor 305 is installed on the side of the binding disc 304 near the unprocessed fabric 203, and a bidirectional threaded rod 306 is installed at the output end of the third rotary motor 305. Movable nuts 307 pass through both sides of the bidirectional threaded rod 306. The movable nuts 307 and the bidirectional threaded rod 306 are driven by threads. Three sets of auxiliary wheels 308 are installed at the top of the movable nuts 307.

[0069] A shrinkage triangle plate 309 is installed on the support side plate 303 near the unprocessed fabric 203. During the fabric edge folding and compaction stage, the unprocessed fabric 203 enters the shrinkage transport channel with shrinkage triangle plates 309 on both sides. The sides are pushed inward by the auxiliary wheel 308, causing it to bulge. The shrinkage triangle plate 309 has a groove that is deeper than the auxiliary wheel 308 near the auxiliary wheel 308, which is convenient to adapt to the adjusted auxiliary wheel 308.

[0070] A first magnetic slide 310 is installed on the side of the support side plate 303 away from the fabric tension structure 2, and an equilateral triangular U-shaped edge presser 313 is installed on the top of the first magnetic slide 310. A second magnetic slide 311 is installed on one side of the first magnetic slide 310, and an oblique triangular U-shaped edge presser 314 is installed on the top of the second magnetic slide 311.

[0071] A third magnetic slide 312 is installed on one side of the second magnetic slide 311. A U-shaped base 315 is installed on the top of the third magnetic slide 312. A first hinge 316 is hinged to one side of the U-shaped base 315, and a manual pressure handle 317 is hinged to the top of the first hinge 316. The function of the first hinge 316 is to stabilize the midpoint of 317 and limit the range of motion of the manual pressure handle 317. A flip point 319 is provided at the top of the U-shaped base 315, and an L-shaped connector 318 is hinged to the U-shaped base 315 through the flip point 319. The top of the L-shaped connector 318 is hinged to one side of the manual pressure handle 317, and a pressure plate 320 is installed at the bottom of the L-shaped connector 318.

[0072] By pulling up the manual pressure handle 317, the L-shaped connector 318 is pressed down around the flip point 319 through the transmission between the parts, pressing the edge plate 320 inward in the direction of the inward folding onto the edge of the fabric. Because the fabric inside the edge binding is one or two layers more than the fabric at the place where it needs to be sewn after multiple folds of the fabric edge, the area where it needs to be sewn needs to be pressed with greater force. The inward pressing force of the L-shaped connector 318 is more in line with the edge of the fabric where it needs to be sewn.

[0073] The double-sided sewing structure 5 includes a sewing table 501, and a sealing sewing machine 502 is installed on one side of the sewing table 501. A fabric holding plate 503 is installed at the bottom of the sealing sewing machine 502. A lifting rubber block 504 is provided in the middle of the bottom end of the sewing table 501 near the unprocessed fabric 203. A thread breakage resistance wheel 505 is installed on the side of the sewing table 501 near the unprocessed fabric 203. A protective cover 506 is installed on the top of the thread breakage resistance wheel 505. The unprocessed fabric 203 passes between the thread breakage resistance wheel 505 and the protective cover 506.

[0074] The unprocessed fabric 203 has fabric fringes 4 on both sides;

[0075] Finally, the control panel controls the electromagnet adsorption state in the magnetic slide rail through the current signal, adjusts the position of the edge presser, and has a monitoring component to monitor the position in real time and feed it back to the control panel to ensure accurate positioning. The bidirectional threaded rod 306 drives the movable nut 307 to drive the auxiliary wheel 308 to adjust and move, so that the two sides of the fabric can bulge more smoothly.

[0076] Working principle: First is the feeding stage: Unprocessed fabric 203 enters the device through the feed port 224 at the bottom of the arc-shaped pressure plate 211 at the feeding end. The edge distance detection device 223 detects the edge position of the fabric to provide a basis for subsequent adjustments. The edge distance information is transmitted to the operating table through the control system to prompt the operator to make necessary adjustments.

[0077] Then comes the tension adjustment stage: the unprocessed fabric 203 bypasses the two sets of rollers on the side and bottom, namely the first pressure roller 217 and the second pressure roller 218. By starting the first telescopic motor 210, the arc-shaped pressure plate 211 is brought closer to the unprocessed fabric 203 to adjust the position of the pressure plate, thereby controlling the pressure of the rollers on the fabric and adjusting the tension of the unprocessed fabric 203 so that it is stretched open. In addition, the first rotary motor 204 is started to drive the irregular bracket 209 to move up and down through the first set of transmission components, thereby driving the arc-shaped pressure plate 211 to move up and down to adjust the position of the pressure plate and further control the pressure of the rollers on the fabric. Adjusting the tension of the fabric by using a pressure plate that can move up, down, left and right is more stable than adjusting the position of the rollers, because rollers are large and heavy, and require a transmission structure on one side to rotate, making movement more troublesome.

[0078] The anti-misalignment correction wheel 219 engages with the first pressure wheel 217 and the second pressure wheel 218 through the spring compensation mechanism elastic hook 221 to ensure the stability of the roller spacing.

[0079] The rollers are driven to rotate simultaneously by starting the second rotary motor 212 through the second set of transmission components. The surfaces of the first pressure roller 217 and the second pressure roller 218 are concave and convex, which has two effects: first, to avoid heat generation from friction with the fabric for a long time; and second, to facilitate engagement with the anti-misalignment correction roller 219.

[0080] Next is the fabric edge folding and pressing stage: Unprocessed fabric 203 enters the shrink transport channel with shrink triangle plates 309 on both sides. The sides are pushed inward by auxiliary wheels 308, causing them to bulge. The bulging fabric edge passes through the equilateral triangle U-shaped edge presser 313, and the edge is gathered up. Then the fabric edge with gathered edge continues to pass through the gradually shrinking oblique triangle U-shaped edge presser 314 and is gradually flattened. Finally, by pulling up the manual pressing handle 317, the L-shaped connector 318 is pressed down around the flip point 319 through the transmission between the parts, pressing the edge presser 320 inward in the direction of the inward pressing on the edge of the fabric. Because the fabric inside the edge is folded multiple times, there are one or two more layers of fabric than the fabric at the place where sewing is required. Therefore, the pressing force required at the place where sewing is required is greater. The inward pressing force of the L-shaped connector 318 is more in line with the edge of the fabric that needs to be sewn.

[0081] The other three sets of magnetic slides control the position of the edge presser, ensuring precise contact with the fabric edge. In addition, the lead screw slide can adjust the distance between the edge presser and the edge according to the fabric width, adapting to fabrics of different widths.

[0082] Finally, there is the linkage control stage: the operating table controls the electromagnet adsorption state in the magnetic slide rail through the current signal, adjusts the position of the edge presser, and there is also a monitoring component to monitor the position in real time and feed it back to the operating table to ensure accurate positioning. The bidirectional threaded rod 306 drives the movable nut 307 to drive the auxiliary wheel 308 to adjust and move, so that the two sides of the fabric can bulge more smoothly.

[0083] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A feeding device for fabric processing in a double-sided automatic sewing machine, comprising a machine table (1) and unprocessed fabric (203), characterized in that: One side of the machine table (1) is provided with cloth tension structure (2), the middle position of machine table (1) is provided with double edge compression structure (3), the other side of machine table (1) is provided with double edge sewing structure (5); The cloth tension structure (2) includes a first rotary motor (204), a first telescopic motor (210), an arc pressing plate (211), a second rotary motor (212), a first pressure wheel (217), a second pressure wheel (218), an anti-misplacement deviation wheel (219) and two sets of transmission assemblies, the first rotary motor (204) drives the first telescopic motor (210) to move up and down through the first set of transmission assemblies, the first telescopic motor (210) drives the arc pressing plate (211) to move left and right, and the arc pressing plate (211) is in contact with the unprocessed cloth (203), the anti-misplacement deviation wheel (219) is engaged with the first pressure wheel (217) and the second pressure wheel (218), and the second rotary motor (212) drives the first pressure wheel (217) and the second pressure wheel (218) to rotate through the second set of transmission assemblies; The double edge compression structure (3) includes a third rotary motor (305), a bidirectional threaded rod (306), a movable nut (307), a right triangular U-shaped edge compressor (313), an inclined triangular U-shaped edge compressor (314), a manual pressing handle (317) and an edge pressing plate (320), the third rotary motor (305) drives the two movable nuts (307) to move relative to each other through the bidirectional threaded rod (306), the unprocessed cloth (203) passes through the right triangular U-shaped edge compressor (313) and the inclined triangular U-shaped edge compressor (314), and the manual pressing handle (317) drives the edge pressing plate (320) to buckle inward and press against the edge of the unprocessed cloth (203) through the linkage assembly.

2. The feeding device for fabric processing of a double-edge automatic hemming machine according to claim 1, characterized in that: The cloth tension structure (2) further includes a support frame (201), the support frame (201) is fixed with the machine table (1), the first rotary motor (204) is installed in the inside of the support frame (201), the output end of the first rotary motor (204) is connected with a first belt (205) of the first set of transmission assemblies, one side of the first belt (205) away from the first rotary motor (204) is connected with a first belt pulley (206), the bottom end of the first belt pulley (206) is connected with a transmission screw rod (222), the bottom end of the transmission screw rod (222) penetrates a transmission nut (207), and the transmission screw rod (222) and the transmission nut (207) are in threaded transmission, the bottom end of the transmission nut (207) is installed with a special-shaped support (209), and one side of the special-shaped support (209) close to the support frame (201) is installed with a limit sliding rail (208).

3. The feeding device for fabric processing of a double-edge automatic hemming machine according to claim 2, characterized in that: One end of the special-shaped support (209) away from the transmission nut (207) is installed with the first telescopic motor (210), and the output end of the first telescopic motor (210) is connected with the arc pressing plate (211), and one side of the top end of the arc pressing plate (211) close to the unprocessed cloth (203) is arc-shaped; The special-shaped support (209) is provided with an inlet (224) at the bottom end near the side of the first telescopic motor (210), and the unprocessed cloth (203) passes through the inlet (224), and the side of the top end of the inlet (224) is provided with a margin detection device (223).

4. The fabric processing feeding device of double-edge automatic sewing machine according to claim 2, characterized in that: The top end of the support frame (201) is provided with a movable turntable (202), and the unprocessed cloth (203) is in contact with the movable turntable (202). The second rotary motor (212) is installed at the middle of the inside of the support frame (201), and the output end of the second rotary motor (212) is connected with a second belt pulley (213), the surface of the second belt pulley (213) is provided with a second belt (214), one side of the second belt pulley (213) is provided with a third belt pulley (215), and the bottom end of the second belt pulley (213) is provided with a fourth belt pulley (216), and the fourth belt pulley (216), the third belt pulley (215) and the second belt pulley (213) are driven by the second belt (214). The third belt pulley (215) is connected with the first pressure wheel (217), and the fourth belt pulley (216) is connected with the second pressure wheel (218).

5. The fabric processing feeding device of double-edge automatic sewing machine according to claim 4, characterized in that: The bottom end of the support frame (201) is provided with a limiting through slot (220) on both sides, the anti-misplacement correction wheel (219) is connected with the limiting through slot (220) on both sides, the anti-misplacement correction wheel (219) is provided with an elastic hook (221) on both sides, and the end of the elastic hook (221) away from the anti-misplacement correction wheel (219) is connected with the support frame (201).

6. The double-edge automatic overlock machine fabric processing feeding device according to claim 1, characterized in that: The double-edge pressing structure (3) further comprises a first magnetic sliding rail (301) connected with the machine table (1), a first magnetic sliding block (302) installed at the top end of the first magnetic sliding rail (301), a supporting side plate (303) installed at the top end of the first magnetic sliding block (302), and a covering disc (304) installed at the top end of the supporting side plate (303). The covering disc (304) is provided with a third rotary motor (305) on the side close to the unprocessed cloth (203), and the output end of the third rotary motor (305) is provided with a bidirectional threaded rod (306), the two sides of the bidirectional threaded rod (306) are both provided with a movable nut (307), the movable nut (307) and the bidirectional threaded rod (306) are in threaded transmission, and the top end of the movable nut (307) is provided with three groups of auxiliary wheels (308). The supporting side plate (303) is provided with a shrinkage triangular plate (309) near the unprocessed cloth (203), and the shrinkage triangular plate (309) is provided with a groove deeper than the auxiliary wheel (308) near the auxiliary wheel (308).

7. The double-edge automatic hemming machine fabric processing feeding device according to claim 6, characterized in that: The supporting side plate (303) is provided with a first magnetic slide (310) on the side far from the cloth tension structure (2), and the top end of the first magnetic slide (310) is provided with a right triangle U-shaped edge presser (313); one side of the first magnetic slide (310) is provided with a second magnetic slide (311), and the top end of the second magnetic slide (311) is provided with an inclined triangle U-shaped edge presser (314).

8. The double-edge automatic hemming machine fabric processing feeding device according to claim 7, characterized in that: One side of the second magnetic slide (311) is provided with a third magnetic slide (312), and the top end of the third magnetic slide (312) is provided with a fourth base (315); one side of the fourth base (315) is hingedly connected with a first hinged part (316), and the top end of the first hinged part (316) is hingedly connected with a manual pressing handle (317); the top end of the fourth base (315) is provided with a turning point (319), and the fourth base (315) is hingedly connected with an L-shaped connecting part (318) through the turning point (319); the top end of the L-shaped connecting part (318) is hingedly connected with one side of the manual pressing handle (317), and the bottom end of the L-shaped connecting part (318) is provided with an edge pressing plate (320).

9. The double-edge automatic overlock machine fabric processing feeding device according to claim 1, characterized in that: The double-edge sewing structure (5) comprises a sewing table (501), and one side of the sewing table (501) is provided with an edge sealing sewing machine (502); the bottom end of the edge sealing sewing machine (502) is provided with a cloth placing plate (503); the middle part of the bottom end of the side close to the unprocessed cloth (203) of the sewing table (501) is provided with a raised rubber block (504); the side close to the unprocessed cloth (203) of the sewing table (501) is provided with a thread breaking removing resistance wheel (505), and the top end of the thread breaking removing resistance wheel (505) is provided with a protective cover (506); the unprocessed cloth (203) passes through between the thread breaking removing resistance wheel (505) and the protective cover (506). Both sides of the unprocessed cloth (203) are provided with cloth selvedges (4).

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