Flat flexible material draw stitch mechanism and method

Abstract

This invention provides a flat flexible fabric feeding and sewing mechanism, which consists of a sewing machine assembly, a tensioning rod, a material clamp, a guide rail, etc. This mechanism can realize the feeding and sewing of flat flexible fabric under full tension, avoiding the adverse factors of manual operation on the fabric production process in terms of efficiency, stability and quality, thereby improving production efficiency, production quality and automation, greatly reducing labor costs, improving the production working environment, and filling a gap in the industry.

Description

Technical Field

[0001] This invention relates to the technical field of dyeing and finishing equipment for flat flexible fabrics, specifically to a flat flexible fabric feeding and sewing mechanism and its usage method. Background Technology

[0002] Flat-width flexible fabrics are still a labor-intensive industry in the dyeing and finishing process. Due to the wide range and variety of material properties such as width, thickness and elasticity of flat-width flexible fabrics, coupled with the poor rigidity of the flexible fabrics themselves, the only way to achieve this is to manually guide and sew the fabric in sections. However, this method involves a lot of manual intervention, a poor production environment, high labor intensity and poor stability, resulting in low production efficiency and quality, and high labor costs. There is no mature technology in the industry yet, and there is an urgent need for a flat-width flexible fabric guiding and sewing mechanism to solve the above pain points. Summary of the Invention

[0003] In view of this, the present invention discloses a fabric feeding and sewing mechanism and method for flat flexible fabric, the specific solution of which is as follows:

[0004] A flat flexible fabric feeding and sewing mechanism for sewing fabric heads includes a sewing machine assembly, a tension bar, a fabric head bottom clamping device, and a sewing machine bracket;

[0005] The tensioning rod has a rod-shaped structure;

[0006] The bottom clamping device of the material gathering head includes a clamping base, a transverse slider, a transverse slide rail, a transverse platform, a transverse cylinder, a fixed platform, a first lifting cylinder, and a material gathering head clamping mechanism. The clamping base is located below the tensioning rod, and the clamping base is provided with a transverse slide rail. The transverse slider is located on the transverse slide rail, and the transverse platform is located on the transverse slider. The transverse cylinder is located on the clamping base and connected to the transverse platform. The fixed platform is located on the transverse platform, and the fixed platform is provided with a first lifting cylinder. There are at least two sets of the first lifting cylinders arranged in an array along the longitudinal direction. The piston rod end of each set of the first lifting cylinder is provided with a combined material gathering head clamping mechanism. The material gathering head clamping mechanism includes a lifting platform, a bidirectional cylinder, a first clamping plate, and a second clamping plate. The bidirectional cylinder is located on the lifting platform, the first clamping plate is located on the first piston rod of the bidirectional cylinder, and the second clamping plate is located on the second piston rod of the bidirectional cylinder, so that the two clamping plates can move relative to each other to clamp the fabric.

[0007] The sewing machine bracket is located on the right side of the tension rod and includes a bracket body, a sewing machine guide rail, and a longitudinal movement rack. The sewing machine guide rail and the longitudinal movement rack are both mounted on the bracket body.

[0008] The sewing machine assembly includes a support platform, a sewing machine, a fabric feed platform, and a sewing machine drive motor. The support platform is mounted on the sewing machine guide rail. Both the sewing machine drive motor and the sewing machine are mounted on the support platform. The sewing machine drive motor is equipped with a gear that meshes with a longitudinal moving rack. The fabric feed platform is mounted on the support platform and located in front of the presser foot of the sewing machine. The fabric feed platform has a plate-like structure with an oblique tilt angle at its front end.

[0009] As a supplement to the technical solution of the present invention, the sewing machine assembly further includes a cutter, which is disposed on the sewing machine and located to the left of the presser foot of the sewing machine.

[0010] As a supplement to the technical solution of the present invention, it also includes a proximity switch and a metal protrusion. Each combination of material head clamping mechanism is provided with a proximity switch. The proximity switch is set on the lifting platform, and the support platform of the sewing machine assembly is provided with a metal protrusion that cooperates with the proximity switch.

[0011] As a supplement to the technical solution of the present invention, the sewing machine assembly further includes a fabric guide wheel device, which is disposed on the support platform of the sewing machine assembly and located above the fabric guide platform. The fabric guide wheel device includes a fabric guide wheel drive motor, a support plate, a fabric guide wheel, and a rotating shaft. The support plate is provided in two sets and is arranged relatively parallel to each other. The rotating shaft is disposed between the two sets of support plates and is connected to the support plate through a bearing. The fabric guide wheel is disposed on the rotating shaft, and the fabric guide wheel drive motor is connected to the rotating shaft.

[0012] As a supplement to the technical solution of the present invention, the fabric guiding wheel device further includes a ratchet. The ratchet is disposed on the rotating shaft. There are two sets of ratchets located on both sides of the fabric guiding wheel. The outer surface of the ratchet is provided with spike-like protrusions. The diameter of the ratchet is larger than the diameter of the fabric guiding wheel.

[0013] As a supplement to the technical solution of the present invention, the relationship between the diameter of the ratchet, the diameter of the guide wheel, and the thickness A of the feed head is as follows:

[0014]

[0015] In the above formula, D 棘 D is the diameter of the ratchet. 引 A is the diameter of the feed roller, and A is the thickness of the feed head.

[0016] As a supplement to the technical solution of the present invention, the sewing machine assembly further includes a lifting support plate and a second lifting cylinder; the second lifting cylinder is disposed on the support platform of the sewing machine assembly, the lifting support plate is disposed at the end of the piston rod of the second lifting cylinder, and the fabric guide wheel device and the fabric guide wheel drive motor are both disposed on the lifting support plate.

[0017] As a supplement to the technical solution of the present invention, the fabric guiding wheel device further includes a first synchronous belt, a second synchronous belt, a first pulley, a second pulley, and a third pulley;

[0018] The rotating shaft is provided in three sets, namely the first rotating shaft, the second rotating shaft, and the third rotating shaft;

[0019] The fabric guiding wheels are provided in three sets, namely the first fabric guiding wheel, the second fabric guiding wheel, and the third fabric guiding wheel;

[0020] The ratchet consists of three sets: a first ratchet, a second ratchet, and a third ratchet.

[0021] The three sets of feed wheels have the same diameter, and the three sets of ratchet wheels have the same diameter;

[0022] The first, second, and third rotating shafts are arranged sequentially from back to front between two sets of support plates. The first fabric guide wheel, the first pulley, and the first ratchet are all arranged on the first rotating shaft. The second fabric guide wheel, the second pulley, and the second ratchet are all arranged on the second rotating shaft. The third fabric guide wheel, the third pulley, and the third ratchet are arranged on the third rotating shaft. A first synchronous belt connects the first pulley and the second pulley, and a second synchronous belt connects the second pulley and the third pulley. The fabric guide wheel drive motor is connected to the first rotating shaft.

[0023] The diameters of the first pulley, the second pulley, and the third pulley are related as follows:

[0024] D1≤D2≤D3

[0025] In the above formula, D1 is the diameter of the first pulley, D2 is the diameter of the second pulley, and D3 is the diameter of the third pulley.

[0026] As a supplement to the technical solution of the present invention, the distance between the two adjacent material feeding head clamping mechanisms is greater than the total length of the fabric guiding wheel device.

[0027] The present invention also discloses a method for using the above-mentioned flat flexible fabric sewing mechanism, comprising the following steps:

[0028] S1. The first lifting cylinder of the bottom clamping device of the material mixing head drives the material mixing head clamping mechanism to rise and clamp the material mixing head. Then, the transverse moving cylinder of the bottom clamping device of the material mixing head drives the transverse moving platform to move the material mixing head clamping mechanism to the right of the tensioning rod. During this process, the first lifting cylinder drives the material mixing head clamping mechanism to rise to the same height as the tensioning rod, so that the material mixing head located between the material mixing head clamping mechanism and the tensioning rod is in a tensioned and close state. The material mixing head clamping mechanism, in conjunction with the tensioning rod, applies a transverse tension force to the material mixing head.

[0029] S2. The sewing machine drive motor of the sewing machine assembly drives the support platform to slide on the sewing machine guide rail. When the proximity switch detects the metal protrusion, the second lifting cylinder retracts, driving the fabric guide wheel device to press down and press the material gathering head onto the fabric guide platform. Then, the piston rod of the bidirectional cylinder on the material gathering head clamping mechanism extends, causing the first clamping piece to separate from the second clamping piece and release the clamping of the material gathering head. Then, the piston rod of the first lifting cylinder used to support the material gathering head clamping mechanism retracts, causing the material gathering head clamping mechanism to descend.

[0030] Then, the rotating shaft is driven by the fabric guide wheel drive motor to rotate, so that the ratchet engages with the fabric guide platform to bite the fabric head and apply longitudinal tension to the fabric head. As the sewing machine slides forward, the fabric head is sewn together, and at the same time, the cutter cuts the sewn part of the fabric head. As the sewing machine continues to move forward, the piston rods of multiple sets of first lifting cylinders retract in sequence.

[0031] S3. After the sewing of the fabric head is completed, the sewing machine drive motor of the sewing machine assembly drives the support platform to slide along the sewing machine guide rail, so that the sewing machine is reset. The transverse cylinder of the bottom clamping device of the fabric head drives the transverse platform to move the fabric head clamping mechanism to the left of the tension rod to reset.

[0032] Beneficial effects: The flat flexible fabric sewing mechanism disclosed in this invention can realize automatic sewing of fabric, replacing manual labor, improving work efficiency while ensuring sewing quality. In another aspect of this invention, by using the bottom clamping device of the fabric gathering head and the fabric guiding wheel device of the sewing machine assembly in conjunction with the fabric guiding platform, a stable lateral and longitudinal tension force is applied to the fabric gathering head throughout the process, ensuring sewing quality. Attached Figure Description

[0033] Figure 1 Left view of the fabric feeding and sewing mechanism for flat flexible fabric.

[0034] Figure 2 This is a top view of the fabric feeding and sewing mechanism for flat, flexible fabric.

[0035] Figure 3 This is a schematic diagram of the bottom clamping device of the material handling head.

[0036] Figure 4 This is a schematic diagram of the structure of a sewing machine bracket and sewing machine components.

[0037] Figure 5 This is a schematic diagram of the sewing machine component structure.

[0038] Figure 6 This is a schematic diagram of the fabric feeding wheel device.

[0039] Figure 7 This is a schematic diagram of the fabric feeding wheel device.

[0040] Figure 8 This is a schematic diagram showing the fabric subjected to lateral and longitudinal tension forces.

[0041] In the diagram: 1. Sewing machine assembly, 2. Tensioning rod, 3. Fabric feed head bottom chuck device, 4. Sewing machine bracket, 5. Chuck base, 6. Horizontal slide rail, 7. Horizontal rack, 8. Horizontal platform, 9. Horizontal motor, 10. Fixed platform, 11. First lifting cylinder, 12. Lifting platform, 13. First clamp, 14. Second clamp, 15. Bracket body, 16. Sewing machine guide rail, 17. Longitudinal rack, 18. Support platform, 19. Sewing machine, 20. Fabric feed platform, 21. Thread channel bracket, 22. Thread roll, 23. Sewing machine. 24. Fabric guide wheel device, 25. Fabric guide wheel drive motor, 26. Support plate, 27. Lifting pallet, 28. Second lifting cylinder, 29. First synchronous belt, 30. Second synchronous belt, 31. First pulley, 32. Second pulley, 33. Third pulley, 34. First fabric guide wheel, 35. Second fabric guide wheel, 36. Third fabric guide wheel, 37. First ratchet, 38. Second ratchet, 39. Third ratchet, 40. First rotating shaft, 41. Second rotating shaft, 42. Third rotating shaft, 43. Double-acting cylinder, 44. Material collection head. Detailed Implementation

[0042] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] In the fabric dyeing and finishing process, multiple pieces of fabric need to be stored in several frames. The first piece of fabric in each frame is placed at the back, and the last piece is placed at the front. During continuous production, the pieces of adjacent frames need to be sewn together; specifically, the first piece of fabric from one frame is sewn to the last piece of fabric from the next frame, so that the multiple frames of fabric enter the dyeing and finishing process as a continuous whole. In this sewing process, the industry typically uses manual sewing. However, this method involves a lot of manual intervention, a poor working environment, high labor intensity, and poor stability, resulting in low production efficiency and quality.

[0045] like Figures 1 to 8 As shown, the present invention discloses a flat flexible fabric feeding and sewing mechanism, including a sewing machine assembly 1, a tensioning rod 2, a bottom clamping device for the material feeding head 3, a sewing machine bracket 4, and a gripper.

[0046] The gripper is used to clamp the upper part of the first piece of fabric and the last piece of fabric, and works with the bottom gripper device of the fabric head and the tensioning rod 2 to apply tension to the fabric.

[0047] The tensioning rod 2 is a rod-shaped structure with its length direction parallel to the horizontal plane, and it is located on the right side of the first material head of the previous section of fabric and the last material head of the subsequent section of fabric.

[0048] The bottom clamping device 3 of the material combining head is used to clamp the first end of the previous section of fabric and the last end of the next section of fabric, so that the ends of the two sections of fabric are attached to form a material combining head.

[0049] The bottom clamping device of the material mixing head includes a clamping base 5, a transverse slider 6, a transverse slide rail 7, a transverse platform 8, a transverse cylinder 9, a fixed platform 10, a first lifting cylinder 11, and a material mixing head clamping mechanism.

[0050] The chuck base 5 is located below the tensioning rod 2. The chuck base 5 is provided with a transverse slide rail 7. The transverse slider 6 is located on the transverse slide rail 7. The transverse platform 8 is located on the transverse slider 6. The transverse cylinder 9 is located on the chuck base 5 and is connected to the transverse platform 8. The transverse platform 8 is driven to slide along the length direction of the transverse slide rail 7 by the transverse cylinder 9.

[0051] The fixed platform 10 is set on the transverse platform 8, and the fixed platform 10 is provided with a first lifting cylinder 11. The first lifting cylinder 11 is provided with at least two sets and arranged in an array along the longitudinal direction. The end of the piston rod of each set of the first lifting cylinder 11 is provided with a combined material head clamping mechanism. The first lifting cylinder 11 can drive the combined material head clamping mechanism to lift and lower independently.

[0052] The material clamping mechanism has at least two sets arranged in an array along the longitudinal direction, capable of fully covering the width of the material clamping head. For example... Figure 3 As shown, the material-combining head clamping mechanism disclosed in this invention comprises five sets: a first material-combining head clamping mechanism, a second material-combining head clamping mechanism, a third material-combining head clamping mechanism, a fourth material-combining head clamping mechanism, and a fifth material-combining head clamping mechanism. Correspondingly, the first lifting cylinder 11 also comprises five sets: a first cylinder I, a first cylinder II, a first cylinder III, a first cylinder IV, and a first cylinder V. The first material-combining head clamping mechanism is mounted on the first cylinder I, the second material-combining head clamping mechanism is mounted on the first cylinder II, the third material-combining head clamping mechanism is mounted on the first cylinder III, the fourth material-combining head clamping mechanism is mounted on the first cylinder IV, and the fifth material-combining head clamping mechanism is mounted on the first cylinder V.

[0053] The fabric clamping mechanism includes a lifting platform 12, a bidirectional cylinder 43, a first clamping plate 13, and a second clamping plate 14. The bidirectional cylinder 43 is mounted on the lifting platform 12 and has two piston rods that can move in opposite directions. The first clamping plate 13 is mounted on the first piston rod, and the second clamping plate 14 is mounted on the second piston rod, allowing the two clamping plates to move relative to each other to clamp the fabric. Through this structural design, the lifting platform 12 can perform lifting and lateral movements.

[0054] The bottom clamping device 3 of the material gathering head can clamp the material gathering head. First, it moves horizontally to the right from below the tensioning rod 2, and then it moves upward so that the clamping head of the bottom clamping head rises to the same height as the tensioning rod 2, so that the two sections of fabric between the tensioning rod 2 and the clamping head are in a close fit, which makes it easy for the sewing machine assembly 1 to sew the two sections of fabric together.

[0055] The sewing machine bracket 4 is located to the right of the tension rod 2.

[0056] The sewing machine bracket 4 includes a bracket body 15, a sewing machine guide rail 16, and a longitudinal moving rack 17, both of which are mounted on the bracket body 15.

[0057] The sewing machine assembly 1 includes a support platform 18, a sewing machine 19, a fabric feed platform 20, a thread channel bracket 21, a thread roll 22, a cutter, and a sewing machine drive motor 23. The support platform 18 is mounted on a sewing machine guide rail 16, and a slider that cooperates with the guide rail is provided on the support platform 18, allowing the support platform 18 to slide on the sewing machine guide rail 16. The sewing machine drive motor 23 is mounted on the support platform 18, and a gear is provided on the shaft of the sewing machine drive motor 23. The gear on the sewing machine drive motor 23 meshes with a longitudinal rack 17, enabling the sewing machine drive motor 23 to drive the support platform 18 to slide along the sewing machine guide rail 16.

[0058] The sewing machine 19, the thread channel bracket 21, and the thread roll 22 are all mounted on the support platform 18. The thread channel bracket 21 and the thread roll 22 are both located at the rear of the sewing machine 19. The thread on the thread roll 22 enters the sewing machine 19 through the thread channel bracket 21. The fabric guide platform 20 is mounted on the support platform 18 and located in front of the presser foot of the sewing machine 19. The fabric guide platform 20 has a plate-like structure, and its front end has an oblique tilt angle for guiding the fabric.

[0059] During the sewing process, the fabric head located on the presser foot side will interfere with the position of the sewing machine 19 as it moves longitudinally. The sewing machine assembly 1 is also equipped with a cutter for cutting the fabric head. The cutter is located on the sewing machine 19 and on the presser foot side of the sewing machine 19, and is used to cut the fabric located on the presser foot side.

[0060] In the actual operation of the above-mentioned flat flexible fabric feeding and sewing mechanism, the first clamping piece 13 and the second clamping piece 14 of the bottom clamp of the feeding head first clamp the feeding head, then move to the right to the right side of the tensioning rod 2, and finally rise to the same height as the tensioning rod 2. At this time, the sewing machine assembly 1 works, and the sewing machine drive motor 23 works to make the sewing machine move forward along the sewing machine guide rail 16 to sew the feeding head.

[0061] During the longitudinal movement of the sewing machine 19 along the sewing machine guide rail 16, in order to avoid spatial position interference between the material head clamping mechanism and the sewing machine 19, during the actual sewing process, the multi-combination material head clamping mechanism located on the front side of the sewing machine 19 releases its clamping on the material head and is driven to descend sequentially by the first lifting cylinder 11. To fulfill the above functions, as a supplement to the technical solution of the above embodiments, a proximity switch is also included. Each material head clamping mechanism is equipped with a proximity switch, which is located on the lifting platform 12. Correspondingly, the support platform 18 of the sewing machine assembly 1 has a metal protrusion that cooperates with the proximity switch. When the proximity switch on the material head clamping mechanism located at the front of the sewing machine 19 detects the metal protrusion, the piston rod of the bidirectional cylinder 43 on the material head clamping mechanism extends, causing the first clamping piece 13 to separate from the second clamping piece 14, releasing the clamping of the material head. Then, the piston rod of the first lifting cylinder 11 used to support the material head clamping mechanism retracts, causing the material head clamping mechanism to descend, avoiding spatial position interference with the sewing machine. Through the above arrangement, the first cylinder I, first cylinder II, first cylinder III, first cylinder IV, and first cylinder V descend sequentially, preventing spatial position interference with the sewing machine assembly 1.

[0062] As a preferred embodiment of the present invention, the metal protrusion that cooperates with the proximity switch is located on the left side of the fabric feeding wheel device 24, so that when the material feeding head is located between the fabric feeding wheel device 24 and the fabric feeding platform 20, the proximity switch can detect the metal protrusion and drive the piston rod of the first lifting cylinder 11 to retract.

[0063] As a preferred technical solution of the present invention, the sewing machine assembly 1 further includes a fabric guide wheel device 24, which is disposed on the support platform 18 of the sewing machine assembly 1 and located above the fabric guide platform 20. It is used to cooperate with the fabric guide platform 20 to clamp the fabric, apply vertical pressure to the ends of the two pieces of fabric, and stably input the combined fabric head into the sewing machine 19, thereby improving the sewing quality of the sewing machine 19.

[0064] The fabric guiding wheel device 24 includes a fabric guiding wheel drive motor 25, a support plate 26, a fabric guiding wheel, and a rotating shaft. Two sets of support plates 26 are arranged in parallel relative to each other. The rotating shaft is positioned between the two sets of support plates 26 and connected to the support plates 26 via bearings, allowing the rotating shaft to rotate freely. The fabric guiding wheel is mounted on the rotating shaft.

[0065] The fabric guide wheel drive motor 25 is mounted on the support platform 18 and connected to the rotating shaft to drive the fabric guide wheel to rotate.

[0066] The design of the feed roller enables the clamping of the fabric head and the application of vertical pressure to ensure sewing quality.

[0067] In the above working state, the bottom clamping device 3 of the fabric feed head can provide stable lateral tension for the fabric. However, in actual operation, as the multiple fabric feed head clamping mechanisms release their grip on the fabric feed head one by one, the fabric about to enter the sewing machine 19 for sewing lacks the lateral force applied by the clamps. Furthermore, the outer surface of the feed roller is mostly a smooth joint, limiting the longitudinal force applied to the fabric. This can easily lead to the fabric retracting and rebounding before entering the sewing machine 19's biting range at the moment the clamps are not in place, affecting the sewing quality. To ensure that the fabric has stable lateral and longitudinal tension when entering the sewing machine 19, the feed roller device 24 also includes a ratchet. The ratchet is mounted on a rotating shaft, and two sets are provided, located on both sides of the feed roller. The outer surface of the ratchet has spike-like protrusions for penetrating the fabric, cooperating with the feed platform 20 to bite the fabric and apply longitudinal tension. The diameter of the ratchet is larger than the diameter of the feed roller.

[0068] With the above settings, before the material clamping mechanism located at the front of the sewing machine assembly 1 is driven to descend by the first lifting cylinder 11, the fabric guide platform 20 can cooperate with the fabric guide wheel device 24 to press the material clamping head, applying longitudinal tension force to the material clamping head located between the material clamping head and the tension rod 2. After the fabric guide platform 20 and the fabric guide wheel device 24 have completed the pressing action of the material clamping head, the lateral and longitudinal tension forces of the material clamping head are provided by the fabric guide platform 20 and the fabric guide wheel device 24. The piston rod of the bidirectional cylinder 43 on the material clamping mechanism extends, causing the first clamping piece 13 and the second clamping piece 14 to separate, releasing the clamping of the material clamping head. Then, the piston rod of the first lifting cylinder 11 used to support the material clamping mechanism retracts, causing the material clamping mechanism to descend, avoiding spatial position interference with the sewing machine.

[0069] As a preferred embodiment of the present invention, the diameter D of the ratchet... 棘 With the diameter D of the drawing wheel 引 The relationship between the thickness A of the material head is as follows:

[0070]

[0071] The joining head specifically refers to the point where the tail end of the preceding fabric section is joined with the head end of the following fabric section to form a joining head. This setup allows the ratchet to apply longitudinal tension to the joining head while simultaneously ensuring that the outer circumference of the feed roller can press against the joining head, further improving sewing quality.

[0072] As a preferred embodiment of the present invention, the sewing machine assembly 1 further includes a lifting support plate 27 and a second lifting cylinder 28. The second lifting cylinder 28 is disposed on the support platform 18 of the sewing machine assembly 1, and the lifting support plate 27 is disposed at the end of the piston rod of the second lifting cylinder 28. The lifting support plate 27 is driven to move up and down by the second lifting cylinder 28. The fabric guide wheel device 24 and the fabric guide wheel drive motor 25 are both disposed on the lifting support plate 27. When the sewing machine moves forward until the fabric head is located between the fabric guide wheel device 24 and the fabric guide platform 20, the second lifting cylinder 28 retracts, driving the fabric guide wheel device 24 to press down, pressing the fabric head tightly onto the fabric guide platform 20.

[0073] As a preferred embodiment of the present invention, the fabric feeding wheel device 24 further includes a first synchronous belt 29, a second synchronous belt 30, a first pulley 31, a second pulley 32, and a third pulley 33.

[0074] The rotating shaft is provided in three sets, namely the first rotating shaft 40, the second rotating shaft 41, and the third rotating shaft 42.

[0075] The fabric guiding wheels are provided in three sets, namely the first fabric guiding wheel 34, the second fabric guiding wheel 35, and the third fabric guiding wheel 36.

[0076] The ratchet consists of three sets: a first ratchet 37, a second ratchet 38, and a third ratchet 39.

[0077] The three sets of feed wheels have the same diameter, and the three sets of ratchet wheels have the same diameter.

[0078] The first rotating shaft 40, the second rotating shaft 41, and the third rotating shaft 42 are arranged sequentially from back to front between the two sets of support plates 26. The first fabric guide wheel 34, the first belt pulley 31, and the first ratchet 37 are all arranged on the first rotating shaft 40; the second fabric guide wheel 35, the second belt pulley 32, and the second ratchet 38 are all arranged on the second rotating shaft 41; and the third fabric guide wheel 36, the third belt pulley 33, and the third ratchet 39 are arranged on the third rotating shaft 42.

[0079] A first synchronous belt 29 connects the first pulley 31 and the second pulley 32, and a second synchronous belt 30 connects the second pulley 32 and the third pulley 33. The fabric guide wheel drive motor 25 is connected to the first rotating shaft 40 and drives the first rotating shaft 40 to rotate.

[0080] The diameters of the first pulley 31, the second pulley 32, and the third pulley 33 are related as follows:

[0081] D1≤D2≤D3

[0082] D1 is the diameter of the first pulley 31, D2 is the diameter of the second pulley 32, and D3 is the diameter of the third pulley 33.

[0083] Through the above settings, when the feed roller drive motor 25 rotates, driving the first rotating shaft 40 to rotate, the second pulley 32 and the third pulley 33 rotate simultaneously. Since the diameters of the first pulley 31, second pulley 32, and third pulley 33 gradually increase, the rotational speeds of the first rotating shaft 40, second rotating shaft 41, and third rotating shaft 42 gradually decrease. Because the three sets of ratchet wheels have equal diameters, the peripheral rotational linear speeds of the first ratchet wheel 37, second ratchet wheel 38, and third ratchet wheel 39 gradually decrease. This results in the tension applied to the fabric between the first ratchet wheel 37 and the second ratchet wheel 38 being greater than the tension applied to the fabric between the second ratchet wheel 38 and the third ratchet wheel 39. Consequently, the longitudinal tension on the sewing head gradually increases as it enters the sewing machine, ensuring sewing quality. Simultaneously, the bottom clamping device of the fabric feed head ensures stable tension application, ultimately maintaining both lateral and longitudinal tension on the fabric feed head before it is conveyed into the sewing machine 19 for sewing.

[0084] As a preferred technical solution of the present invention, the distance between the two adjacent material clamping mechanisms is greater than the total length of the fabric guide wheel device 24. This ensures that during the linear motion of the sewing machine 19, as the material clamping mechanisms descend and release the material in sequence, the material guide maintains stable lateral and longitudinal tension throughout the sewing process, thereby achieving high-quality and high-efficiency automatic fabric guiding and sewing.

[0085] The present invention also discloses a method for using the above-mentioned flat flexible fabric sewing mechanism, comprising the following steps:

[0086] S1. The first lifting cylinder 11 of the bottom clamping device 3 of the material mixing head drives the material mixing head clamping mechanism to rise, so that the material mixing head clamping mechanism clamps the material mixing head. Then, the transverse cylinder 9 of the bottom clamping device 3 of the material mixing head drives the transverse platform 8 to move the material mixing head clamping mechanism to the right side of the tensioning rod 2. During this process, the piston rod of the first lifting cylinder 11 rises synchronously, so that the material mixing head clamping mechanism rises to the same height as the tensioning rod 2, so that the material mixing head located between the material mixing head clamping mechanism and the tensioning rod 2 is in a tensioned and close state. The material mixing head clamping mechanism, together with the tensioning rod 2, applies a transverse tension force to the material mixing head.

[0087] S2. The sewing machine drive motor 23 of sewing machine assembly 1 drives the support platform 18 to slide along the sewing machine guide rail 16. When the proximity switch detects the metal protrusion, the second lifting cylinder 28 retracts, driving the fabric guide wheel device 24 to press down and press the fabric head onto the fabric guide platform 20. Then, the piston rod of the bidirectional cylinder 43 on the fabric head clamping mechanism extends, causing the first clamping piece 13 to separate from the second clamping piece 14, releasing the clamping of the fabric head. Then, the piston rod of the first lifting cylinder 11, which supports the fabric head clamping mechanism, retracts, causing the fabric head clamping mechanism to descend. Subsequently, the fabric guide wheel drives the... Motor 25 drives the first rotating shaft to rotate, which in turn drives the second rotating shaft 41 and the third rotating shaft 42 to rotate via the first synchronous belt 29 and the second synchronous belt 30 of the fabric guide wheel device 24. The first fabric guide wheel 34, the second fabric guide wheel 35, and the third fabric guide wheel 36 roll the fabric head. The lateral and longitudinal tension of the fabric head is provided by the fabric guide platform 20 and the fabric guide wheel device 24. The fabric guide wheel device 24 and the fabric guide platform 20 apply longitudinal tension to the fabric head. At the same time, the ratchet prevents the fabric from rebounding, indirectly maintaining the lateral tension provided by the fabric head clamping mechanism before the fabric guide wheel device 24 presses down. As the sewing machine 19 slides forward, the fabric head is sewn, and at the same time, the cutter cuts the sewn part of the fabric head. As the sewing machine 19 moves forward continuously, the piston rods of the multiple sets of first lifting cylinders 11 retract sequentially.

[0088] S3. After the sewing of the fabric head is completed, the sewing machine drive motor 23 of the sewing machine assembly 1 drives the support platform 18 to slide along the sewing machine guide rail 16, causing the sewing machine 19 to reset. The transverse cylinder 9 of the fabric head bottom clamping device 3 drives the transverse platform 8 to move the fabric head clamping mechanism to the left of the tension rod 2 and reset it, so that the fabric head clamping mechanism is moved directly under the fabric. The above working steps are repeated to complete the continuous sewing of the fabric head.

[0089] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flat-width flexible fabric sewing mechanism for sewing together the fabric heads, characterized in that, Includes sewing machine components (1), tension bar (2), bottom clamp device of the feed head (3), and sewing machine bracket (4); The tensioning rod (2) is a rod-shaped structure; The bottom clamping device (3) of the material mixing head includes a clamping base (5), a transverse sliding block (6), a transverse sliding rail (7), a transverse platform (8), a transverse cylinder (9), a fixed platform (10), a first lifting cylinder (11), and a material mixing head clamping mechanism; the clamping base (5) is located below the tensioning rod (2), the clamping base (5) is provided with a transverse sliding rail (7), the transverse sliding block (6) is located on the transverse sliding rail (7), the transverse platform (8) is located on the transverse sliding block (6), the transverse cylinder (9) is located on the clamping base (5) and the transverse cylinder (9) is connected to the transverse platform (8); the fixed platform (10) is located on the transverse platform (8) and the fixed platform (10) is provided with a first lifting cylinder (11). The first lifting cylinder (11) is provided with at least two sets and arranged in an array along the longitudinal direction. The piston rod end of each set of the first lifting cylinder (11) is provided with a combined material head clamping mechanism. The combined material head clamping mechanism includes a lifting platform (12), a bidirectional cylinder (43), a first clamping plate (13), and a second clamping plate (14). The bidirectional cylinder (43) is provided on the lifting platform (12), the first clamping plate (13) is provided on the first piston rod of the bidirectional cylinder (43), and the second clamping plate (14) is provided on the second piston rod of the bidirectional cylinder (43), so that the two clamping plates can move relative to each other to clamp the fabric. The sewing machine bracket (4) is located on the right side of the tension rod (2) and includes a bracket body (15), a sewing machine guide rail (16), and a longitudinal rack (17). The sewing machine guide rail (16) and the longitudinal rack (17) are both mounted on the bracket body (15). The sewing machine assembly (1) includes a support platform (18), a sewing machine (19), a fabric feeding platform (20), and a sewing machine drive motor (23). The support platform (18) is mounted on the sewing machine guide rail (16). The sewing machine drive motor (23) and the sewing machine (19) are both mounted on the support platform (18). The sewing machine drive motor (23) is equipped with a gear that meshes with the longitudinal rack (17). The fabric feeding platform (20) is mounted on the support platform (18) and is located in front of the presser foot of the sewing machine (19). The fabric feeding platform (20) is a plate-shaped structure with an oblique tilt angle at its front end.

2. The flat flexible fabric feeding and sewing mechanism according to claim 1, characterized in that, The sewing machine assembly (1) also includes a cutter, which is disposed on the sewing machine (19) and located to the left of the presser foot of the sewing machine (19).

3. The flat flexible fabric feeding and sewing mechanism according to claim 2, characterized in that, It also includes proximity switches and metal protrusions. Each material head clamping mechanism is equipped with a proximity switch. The proximity switch is located on the lifting platform (12). The support platform (18) of the sewing machine assembly (1) is equipped with a metal protrusion that cooperates with the proximity switch.

4. The flat flexible fabric feeding and sewing mechanism according to claim 3, characterized in that, The sewing machine assembly (1) also includes a fabric guide wheel device (24), which is disposed on the support platform (18) of the sewing machine assembly (1) and located above the fabric guide platform (20). The fabric guide wheel device (24) includes a fabric guide wheel drive motor (25), a support plate (26), a fabric guide wheel, and a rotating shaft. The support plate (26) is provided in two sets and is arranged in parallel relative to each other. The rotating shaft is disposed between the two sets of support plates (26) and is connected to the support plate (26) through a bearing. The fabric guide wheel is disposed on the rotating shaft, and the fabric guide wheel drive motor (25) is connected to the rotating shaft.

5. The flat flexible fabric feeding and sewing mechanism according to claim 4, characterized in that, The fabric guide wheel device (24) also includes a ratchet, which is mounted on a rotating shaft. There are two sets of ratchets located on both sides of the fabric guide wheel. The outer surface of the ratchet is provided with spike-like protrusions, and the diameter of the ratchet is larger than the diameter of the fabric guide wheel.

6. The flat flexible fabric feeding and sewing mechanism according to claim 5, characterized in that, The relationship between the diameter of the ratchet, the diameter of the feed roller, and the thickness A of the feed head is as follows: In the above formula, D 棘 D is the diameter of the ratchet. 引 A is the diameter of the feed roller, and A is the thickness of the feed head.

7. The flat flexible fabric feeding and sewing mechanism according to claim 5, characterized in that, The sewing machine assembly (1) also includes a lifting plate (27) and a second lifting cylinder (28); the second lifting cylinder (28) is disposed on the support platform (18) of the sewing machine assembly (1), the lifting plate (27) is disposed at the end of the piston rod of the second lifting cylinder (28), and the fabric guide wheel device (24) and the fabric guide wheel drive motor (25) are both disposed on the lifting plate (27).

8. The flat flexible fabric feeding and sewing mechanism according to claim 5, characterized in that, The fabric feeding wheel device (24) also includes a first synchronous belt (29), a second synchronous belt (30), a first pulley (31), a second pulley (32), and a third pulley (33); The rotating shaft is provided in three sets, namely the first rotating shaft (40), the second rotating shaft (41), and the third rotating shaft (42). The fabric guiding wheels are provided in three sets, namely the first fabric guiding wheel (34), the second fabric guiding wheel (35), and the third fabric guiding wheel (36). The ratchet has three sets, namely the first ratchet (37), the second ratchet (38), and the third ratchet (39). The three sets of feed wheels have the same diameter, and the three sets of ratchet wheels have the same diameter; The first rotating shaft (40), the second rotating shaft (41), and the third rotating shaft (42) are arranged sequentially from back to front between the two sets of support plates (26). The first fabric guide wheel (34), the first pulley (31), and the first ratchet (37) are all arranged on the first rotating shaft (40). The second fabric guide wheel (35), the second pulley (32), and the second ratchet (38) are all arranged on the second rotating shaft (41). The third fabric guide wheel (36), the third pulley (33), and the third ratchet (39) are arranged on the third rotating shaft (42). A first synchronous belt (29) is connected between the first pulley (31) and the second pulley (32). A second synchronous belt (30) is connected between the second pulley (32) and the third pulley (33). The fabric guide wheel drive motor (25) is connected to the first rotating shaft (40). The diameters of the first pulley (31), the second pulley (32), and the third pulley (33) are related as follows: D1≤D2≤D3 In the above formula, D1 is the diameter of the first pulley (31), D2 is the diameter of the second pulley (32), and D3 is the diameter of the third pulley (33).

9. A flat flexible fabric feeding and sewing mechanism according to claim 5, characterized in that, The distance between two adjacent material clamping mechanisms is greater than the total length of the fabric feeding wheel device (24).

10. The method of using the flat flexible fabric feeding and sewing mechanism according to claim 7, characterized in that, Includes the following steps: S1. The first lifting cylinder (11) of the bottom clamping device (3) of the material head drives the material head clamping mechanism to rise and clamp the material head. Then, the transverse cylinder (9) of the bottom clamping device (3) of the material head drives the transverse platform (8) to move the material head clamping mechanism to the right side of the tension rod (2). During this process, the first lifting cylinder (11) drives the material head clamping mechanism to rise to the same height as the tension rod (2), so that the material head located between the material head clamping mechanism and the tension rod (2) is in a tensioned and close state. The material head clamping mechanism cooperates with the tension rod (2) to apply a transverse tension force to the material head. S2. The sewing machine drive motor (23) of the sewing machine assembly (1) drives the support platform (18) to slide on the sewing machine guide rail (16). When the proximity switch detects the metal protrusion, the second lifting cylinder (28) retracts, driving the feed roller device (24) to press down and press the material head onto the feed platform (20). Then the piston rod of the bidirectional cylinder (43) on the material head clamping mechanism extends, causing the first clamping piece (13) to separate from the second clamping piece (14), releasing the clamping of the material head. Then the piston rod of the first lifting cylinder (11) used to support the material head clamping mechanism retracts, causing the material head clamping mechanism to descend. Then, the rotating shaft is driven to rotate by the feed roller drive motor (25), so that the ratchet engages with the feed platform (20) to bite the material head and apply longitudinal tension to the material head. As the sewing machine (19) slides forward, the material head is sewn together, and at the same time, the cutter cuts the material head of the sewn part. As the sewing machine (19) moves forward continuously, the piston rods of multiple sets of first lifting cylinders (11) retract in sequence. S3. After the sewing of the fabric head is completed, the sewing machine drive motor (23) of the sewing machine assembly (1) drives the support platform (18) to slide along the sewing machine guide rail (16), so that the sewing machine (19) is reset. The transverse cylinder (9) of the bottom clamping device (3) of the fabric head drives the transverse platform (8) to move the fabric head clamping mechanism to the left side of the tensioning rod (2) and reset.

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