A synchronous feeding structure for a sewing machine and its usage method

Abstract

This application relates to the technical field of sewing machines, and in particular to a synchronous feeding structure for a sewing machine and its method of use. The structure includes a feeding device mounted on a worktable and a pressing device mounted on the machine head. The feeding device includes a pusher plate for squeezing and pushing the lower surface of the fabric and a pushing mechanism mounted on the worktable for driving the pusher plate. The pressing device includes a pressing plate for squeezing the upper surface of the fabric and cooperating with the pusher plate to push the fabric, and a drive mechanism mounted on the machine head for driving the pressing plate. The pusher plate and the pressing plate are arranged opposite each other along the height direction of the worktable. This application improves the convenience of fabric feeding.

Description

Technical Field

[0001] This application relates to the technical field of sewing machines, and in particular to a synchronous feeding structure for a sewing machine and its method of use. Background Technology

[0002] Currently, sewing machines use one or more sewing threads to form one or more stitches on fabric, allowing one or more layers of fabric to interweave or sew together. Sewing machines can sew a variety of fabrics, producing neat, beautiful, flat, and strong stitches. They are fast and easy to use. Generally, sewing machines consist of a worktable, machine head, machine base, transmission, and accessories.

[0003] In the operation of existing sewing machines, the fabric needs to be placed on the sewing head on the worktable first, and the sewing head will sew the fabric. During the sewing process, the operator needs to gradually pull the fabric so that it can slide on the worktable, making it convenient to sew different positions on the same horizontal line of the fabric.

[0004] The aforementioned technologies suffer from the drawback of inconvenient fabric transport during the sewing process. Summary of the Invention

[0005] In order to improve the convenience of fabric feeding, this application provides a synchronous feeding structure for a sewing machine and its usage method.

[0006] Firstly, this application provides a synchronous feeding structure for a sewing machine, which adopts the following technical solution:

[0007] A synchronous feeding structure for a sewing machine includes a feeding device disposed on a worktable and a pressing device disposed on the machine head. The feeding device includes a pusher plate for squeezing and pushing the lower surface of the fabric and a pusher mechanism disposed within the worktable for driving the pusher plate to move. The pressing device includes a pressing plate for squeezing the upper surface of the fabric and cooperating with the pusher plate to push the fabric and a drive mechanism disposed on the machine head for driving the pressing plate to move. The pusher plate and the pressing plate are disposed opposite to each other along the height direction of the worktable.

[0008] By adopting the above technical solution, and by setting up the feeding device and the pressing device, when sewing the fabric, the pushing mechanism and the driving mechanism are activated, which respectively drive the pushing plate to rise and the pressing plate to fall, clamping the fabric. At the same time, the pushing plate and the pressing plate are driven to move forward along the fabric conveying direction, thereby realizing the conveying of the fabric and improving the convenience of fabric conveying.

[0009] Optionally, anti-slip teeth are provided on the opposite sides of the push plate and the clamping plate.

[0010] By adopting the above technical solution and setting anti-slip teeth, the fabric is clamped more stably by the push plate and the pressing plate, thereby making the fabric conveying more efficient.

[0011] Optionally, a limiting groove is provided on the worktable, and a pushing block that slides within the limiting groove is provided on the lower surface of the pushing plate.

[0012] By adopting the above technical solution, the movement of the push plate can be limited by the setting of the limiting groove, so that the push plate can only slide within the limiting groove, and the push plate clamps and pushes the fabric.

[0013] Optionally, the pushing mechanism includes a pushing component disposed within the workbench for driving the pushing block to rise and fall, and a moving component for driving the pushing block to move along the fabric conveying direction.

[0014] By adopting the above technical solution, the push component is activated, which drives the push block to rise and fall. At the same time, the moving component drives the push block to move along the fabric conveying direction, which enables the fabric to be clamped and conveyed.

[0015] Optionally, the pushing assembly includes a cam for driving the push block to rise and fall, a rotating rod for driving the cam to rotate, and a drive component installed in the worktable for driving the rotating rod to rotate.

[0016] By adopting the above technical solution, the starting drive can drive the rotating rod to rotate, which in turn drives the cam to rotate. When the cam rotates, the flange of the cam can push the push block, causing the push block to rise. When the cam of the cam no longer pushes the push block, the push block will descend under the action of gravity. The operation is convenient.

[0017] Optionally, the moving component includes a guide rod disposed on the push block and a guide plate installed in the worktable. The guide plate has a guide groove, the guide rod is located in the guide groove, and moves up and down and moves along the guide groove. When the guide rod is at the highest position of the guide groove, the cam pushes the push plate against the lower surface of the fabric.

[0018] By adopting the above technical solution, when the cam pushes the push block to move, it can drive the guide rod to slide in the guide groove. When the guide rod is at the highest position close to the guide groove, it can abut against the fabric. When the cam pushes the push block to continue sliding, the push plate drives the fabric to be conveyed. When the guide rod is at the highest position of the guide groove, the cam pushes the push plate to press against the lower surface of the fabric, completing the conveying of the fabric. When the cam continues to rotate, it no longer pushes the push block. Under the gravity of the push plate, the push block slides down along the guide groove and resets.

[0019] Optionally, the workbench is provided with a conveying device, which includes a conveyor belt rotatably coupled to the workbench for conveying the fabric, a conveyor roller for driving the conveyor belt to rotate, and a rotating mechanism for driving the conveyor roller to rotate.

[0020] By adopting the above technical solution, and through the setting of the conveying device, when the rotating mechanism is working, it drives the conveying roller to rotate, which in turn drives the conveying belt to rotate, thereby realizing the conveying of the fabric.

[0021] Optionally, the rotating mechanism includes a rotating component for driving the conveyor roller to rotate and a linkage component disposed on the rotating rod for driving the rotating component to rotate.

[0022] By adopting the above technical solution, when the rotating rod rotates, it can drive the linkage component to rotate, which in turn drives the rotating component to rotate, and drives the conveyor roller to rotate. This allows the conveyor belt to rotate simultaneously while the rotating rod is conveying the fabric, thus conveying the fabric placed on the conveyor belt. This enables simultaneous conveying of different positions on the fabric, thereby improving the sewing effect when the machine head sews the fabric.

[0023] Optionally, the drive mechanism includes a lifting assembly for driving the pressure plate up and down and a moving assembly disposed on the machine head for driving the lifting assembly to move.

[0024] By adopting the above technical solution, the pressing plate is lowered by the lifting component to meet the fabric, and then the pressing plate is moved forward along the fabric conveying direction by the moving component, which can realize the conveying of the fabric and is easy to operate.

[0025] Secondly, a method of using a synchronous feeding structure for a sewing machine, utilizing the aforementioned synchronous feeding structure for a sewing machine, includes the following:

[0026] Clamping: Place the fabric between the push plate and the clamping plate, start the push mechanism to raise the push plate, start the drive mechanism to lower the clamping plate, and clamp the fabric.

[0027] Pushing: At the same time, the pushing mechanism drives the pushing plate to move, and the driving mechanism drives the pressing plate to move, pushing the fabric.

[0028] By adopting the above technical solution, the pushing mechanism and the driving mechanism are activated, which drive the pushing plate and the pressing plate to clamp the fabric and push it, thereby realizing the conveying of the fabric and improving the convenience of conveying the fabric.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By setting up a feeding device and a pressing device, when sewing fabric, the pushing mechanism and the driving mechanism are activated, which respectively drive the pushing plate to rise and the pressing plate to fall, clamping the fabric. At the same time, the pushing plate and the pressing plate move forward along the fabric conveying direction, realizing the conveying of the fabric and improving the convenience of fabric conveying. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of this application;

[0032] Figure 2 This is a partial sectional view of this application;

[0033] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0034] Explanation of reference numerals in the attached drawings: 1. Workbench; 11. Limiting groove; 2. Feeding device; 21. Pushing plate; 22. Pushing mechanism; 221. Pushing assembly; 222. Moving assembly; 223. Cam; 224. Rotating rod; 225. Driving component; 226. Guide rod; 227. Guide plate; 228. Guide groove; 3. Machine head; 4. Pressing device; 41. Pressing plate; 42. Driving mechanism; 421. Lifting assembly; 422. Moving assembly Components; 423, Mounting block; 424, Driver 1; 425, Moving plate; 426, Driver 2; 5, Anti-slip teeth; 6, Pushing block; 7, Conveying device; 71, Conveyor belt; 72, Conveyor roller; 73, Rotating mechanism; 731, Rotating assembly; 732, Linkage assembly; 733, Rotating gear; 734, Rack; 735, One-way bearing; 736, Incomplete gear; 737, Linkage gear; 738, Rotating belt. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0036] This application discloses a synchronous feeding structure for a sewing machine. (Refer to...) Figure 1 and Figure 2 It includes a feeding device 2 set on the workbench 1 and a pressing device 4 set on the machine head 3. The feeding device 2 and the pressing device 4 are set opposite each other along the height direction of the workbench 1. The machine head 3 is equipped with a sewing mechanism. When the fabric needs to be sewn, the fabric is first placed on the workbench 1 and located below the machine head 3, and the fabric is sewn by the sewing mechanism. After the sewing is completed, the feeding device 2 and the pressing device 4 clamp the fabric and then convey it to complete the fabric conveying operation.

[0037] Among them, reference Figure 2 and Figure 3Two sets of feeding devices 2 are arranged along the length of the machine head 3, and the two sets of feeding devices 2 are arranged symmetrically. The feeding device 2 includes a push plate 21 for squeezing and pushing the lower surface of the fabric and a push mechanism 22 set in the worktable 1 for driving the push plate 21 to move. The upper surface of the push plate 21 is fixedly provided with anti-slip teeth 5. A limit groove 11 is opened on the worktable 1. The lower surface of the push plate 21 is fixedly provided with a push block 6 that slides in the limit groove 11. The bottom end of the push block 6 is provided with an arc-shaped surface. The push plate 21 slides in the limit groove 11.

[0038] Reference Figure 2 and Figure 3 The pushing mechanism 22 includes a pushing component 221 disposed in the worktable 1 and a moving component 222 for driving the pushing block 6 to move along the fabric conveying direction. The pushing component 221 is used to drive the pushing block 6 to rise and fall. The pushing component 221 includes a cam 223 for driving the pushing block 6 to rise and fall, a rotating rod 224 for driving the cam 223 to rotate, and a driving component 225 fixedly installed in the worktable 1 for driving the rotating rod 224 to rotate. The driving component 225 can be directly a motor. The housing of the driving component 225 is fixedly connected to the worktable 1. The output shaft of the driving component 225 is coaxially fixedly connected to the rotating rod 224, and the worktable 1 provides rotational support for the rotating rod 224. The two rotating rods 224 are fixedly connected along the length direction of the machine head 3, and the cam 223 is fixedly installed on the rotating rod 224.

[0039] Reference Figure 2 and Figure 3 The moving component 222 includes a guide rod 226 fixedly mounted on the push block 6 and a guide plate 227 fixedly installed in the worktable 1. The guide rod 226 is a T-shaped rod, and the end of the guide rod 226 near the guide plate 227 is a spherical structure. The guide plate 227 has a guide groove 228, which is an elliptical groove. The guide groove 228 is inclined upward along the fabric conveying direction and is close to the push plate 21. The guide rod 226 is located in the guide groove 228. When the guide rod 226 slides in the guide groove 228, the guide rod 226 performs lifting and moving movements. When the guide rod 226 is at the highest position of the guide groove 228, the cam 223 pushes the push plate 21 to press against the lower surface of the fabric.

[0040] Reference Figure 2 and Figure 3When the fabric needs to be clamped and conveyed, the drive unit 225 is activated first, driving the rotating rod 224 and cam 223 to rotate. At this time, the flange of cam 223 does not press against the bottom end of the push block 6, and the push block 6 drives the guide rod 226 to be located at the lowest position of the guide groove 228. Cam 223 continues to rotate. When the flange of cam 223 presses against the bottom end of the push block 6, it pushes the push block 6 to move, and at the same time drives the guide rod 226 to slide counterclockwise from the lowest position of the guide groove 228 to the highest position of the guide groove 228. When the guide rod 226 slides to the position close to the highest position of the guide groove 228, the anti-collision function of the push plate 21 is activated. The sliding tooth 5 abuts against the lower surface of the fabric. As the cam 223 continues to rotate, it pushes the push block 6 to continue to rise, causing the guide rod 226 to slide in the guide groove 228. At the same time, the push plate 21 moves forward along the fabric conveying direction to convey the fabric. When the guide rod 226 is at the highest position of the guide groove 228, the cam 223 pushes the anti-slip tooth 5 of the push plate 21 to press against the lower surface of the fabric, completing the conveying of the fabric. When the cam 223 continues to rotate, the cam 223 no longer pushes the push block 6. Under the gravity of the push block 6 and the push plate 21, the push block 6 slides down along the guide groove 228 to reset.

[0041] Reference Figure 2 and Figure 3 The pressing device 4 includes a pressing plate 41 for pressing the upper surface of the fabric and cooperating with the push plate 21 to push the fabric, and a drive mechanism 42 set on the machine head 3. The pressing plate 41 is an L-shaped plate. Two pressing plates 41 are spaced apart along the length of the machine head 3, and a connecting plate is provided between the two pressing plates 41 for fixing the two pressing plates 41 together. The push plate 21 and the pressing plate 41 are arranged opposite each other along the height of the worktable 1. Multiple anti-slip teeth 5 are evenly and fixedly provided on the lower surface of the pressing plate 41.

[0042] Reference Figure 1 and Figure 2 The drive mechanism 42 is used to drive the pressure plate 41 to move. The drive mechanism 42 includes a lifting assembly 421 for driving the pressure plate 41 to rise and fall and a moving assembly 422 set on the machine head 3. The moving assembly 422 is used to drive the lifting assembly 421 to move. The moving assembly 422 includes a moving plate 425 for driving the lifting assembly 421 to move and a second driver 426. The second driver 426 can be directly adopted as a hydraulic cylinder. The cylinder body of the second driver 426 is fixedly installed on the machine head 3, and the piston rod of the second driver 426 is fixedly connected to the moving plate 425.

[0043] Reference Figure 1 and Figure 2The lifting assembly 421 includes a mounting block 423 fixedly mounted on the top of the pressure plate 41 and a driver 424. The driver 424 can be a hydraulic cylinder. The cylinder body of the driver 424 is fixedly mounted on the moving plate 425, and the piston rod of the driver 424 is fixedly connected to the mounting block 423. When the fabric needs to be conveyed, the driver 424 is activated when the push plate 21 rises, causing the mounting block 423 to fall and the pressure plate 41 to fall. The anti-slip teeth 5 of the pressure plate 41 abut against the upper surface of the fabric, while the anti-slip teeth 5 of the push plate 21 abut against the lower surface of the fabric. Then, the driver 426 is activated, causing the moving plate 425 to move forward along the conveying direction of the fabric, moving the pressure plate 41 forward, and simultaneously moving the push plate 21 forward, thus conveying the fabric.

[0044] Reference Figure 1 and Figure 2 In order to achieve simultaneous conveying of the fabric at different positions and thus achieve efficient fabric conveying and better sewing effect, a conveying device 7 is provided on the workbench 1. Two sets of conveying devices 7 are symmetrically arranged along the length of the machine head 3. The conveying device 7 includes a conveyor belt 71 rotatably coupled to the workbench 1, a conveyor roller 72 for driving the conveyor belt 71 to rotate, and a rotating mechanism 73 for driving the conveyor roller 72 to rotate. Two conveyor rollers 72 are arranged along the width of the machine head 3, and the workbench 1 provides rotatable support for the conveyor rollers 72. The conveyor belt 71 is used to convey the fabric and is wound around the two conveyor rollers 72.

[0045] Reference Figure 2 and Figure 3 The rotating mechanism 73 includes a rotating assembly 731 for driving the conveyor roller 72 to rotate and a linkage assembly 732 disposed on the rotating rod 224. The linkage assembly 732 is used to drive the rotating assembly 731 to rotate. The linkage assembly 732 includes a linkage gear 737 and a rotating belt 738. Two linkage gears 737 are spaced apart along the width direction of the machine head 3. One linkage gear 737 is fixedly installed on the rotating rod 224. The rotating belt 738 is wound around the two linkage gears 737, and the worktable 1 provides rotational support for the linkage gears 737.

[0046] Reference Figure 2 and Figure 3The rotating assembly 731 includes a rotating gear 733 fixedly mounted on the conveyor roller 72, a rack 734 meshing with the rotating gear 733, and a one-way bearing 735. The outer ring of the one-way bearing 735 is fixedly connected to the rotating gear 733, and the inner ring of the one-way bearing 735 is fixedly connected to the central axis of the conveyor roller 72. A slide rail is fixedly mounted on the worktable 1, and the rack 734 slides along the height direction of the worktable 1 on the slide rail. An incomplete gear 736 is rotatably engaged on the worktable 1, meshing with the rack 734, and the incomplete gear 736 and the rotating gear 733 are spaced apart along the height direction of the worktable 1.

[0047] Reference Figure 2 and Figure 3 The linkage assembly 732 includes a linkage gear 737 and a rotating belt 738. Two linkage gears 737 are spaced apart along the width direction of the machine head 3. One linkage gear 737 is fixedly mounted on the rotating rod 224, and the other linkage gear 737 is fixedly connected to the incomplete gear 736 by a fixed rotating shaft. The rotating belt 738 is wound around the two linkage gears 737 and meshes with the linkage gears 737.

[0048] Reference Figure 2 and Figure 3 When the drive unit 225 drives the rotating rod 224 to rotate counterclockwise, it sequentially drives the cam 223, the linkage gear 737, the rotating belt 738, and the incomplete gear 736 to rotate. When the cam 223 abuts against the push block 6 and pushes the push block 6 forward in the direction of fabric conveying, the meshing teeth of the incomplete gear 736 mesh with the rack 734, causing the rack 734 to rise. When the rack 734 rises, it drives the rotating gear 733 to rotate, which in turn drives the one-way bearing 735 to rotate. At this time, the inner and outer rings of the one-way bearing 735 are locked, which in turn drives the conveyor roller 72 to rotate and the conveyor belt 71 to rotate. The push plate 21 and the conveyor belt 71 convey the fabric synchronously.

[0049] Reference Figure 2 and Figure 3 When the cam 223 continues to rotate and no longer pushes the push block 6, the incomplete gear 736 no longer meshes with the rack 734. The rack 734 descends under its own weight, driving the rotating gear 733 to rotate. At this time, the inner and outer rings of the one-way bearing 735 rotate relative to each other. The conveying roller 72 does not rotate and no longer conveys the fabric. The fabric is then sewn. After sewing is completed, the fabric is conveyed in the same way as above, and this cycle is repeated to perform the weaving-conveying operation on the fabric.

[0050] The implementation principle of the synchronous feeding structure of a sewing machine in this application embodiment is as follows: When the fabric needs to be processed, the fabric is first placed on the workbench 1, and the sewing mechanism sews the fabric. After sewing, the feeding device 2 and the pressing device 4 are started, which respectively drive the push plate 21 and the pressing plate 41 to clamp the fabric and transport it. At the same time, the conveyor belt 71 is driven to rotate, and the fabric is transported to different positions to complete the efficient conveying operation of the fabric.

[0051] Please refer to Figure 1 and Figure 2 This application also provides a method for using a synchronous feeding structure for a sewing machine, as shown in the figure. This construction method uses the above-mentioned synchronous feeding structure for a sewing machine, specifically including the following:

[0052] Clamping: Place the fabric between the push plate 21 and the pressing plate 41, start the push mechanism 22 to drive the push plate 21 to rise, start the drive mechanism 42 to drive the pressing plate 41 to fall, and clamp the fabric.

[0053] Pushing: Simultaneously, the pushing mechanism 22 drives the pushing plate 21 to move, and the driving mechanism 42 drives the pressing plate 41 to move, pushing the fabric.

[0054] When fabric needs to be processed, the fabric is first placed on the worktable 1. Then, the push rod mechanism 22 and the drive mechanism 42 are activated, causing the push plate 21 to rise and the pressure plate 41 to fall, clamping the fabric. At the same time, the push plate 21 and the pressure plate 41 transport the fabric along the fabric's conveying direction, thus realizing the fabric conveying operation. The specific implementation principle of this method has been described in detail in the above embodiments, so it will not be repeated here.

[0055] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A synchronous feeding structure for a sewing machine, characterized in that: The device includes a feeding device (2) on the workbench (1) and a pressing device (4) on the machine head (3). The feeding device (2) includes a push plate (21) for squeezing and pushing the lower surface of the fabric and a push mechanism (22) for driving the push plate (21) to move inside the workbench (1). The pressing device (4) includes a pressing plate (41) for squeezing the upper surface of the fabric and cooperating with the push plate (21) to push the fabric and a drive mechanism (42) for driving the pressing plate (41) to move on the machine head (3). The push plate (21) and the pressing plate (41) are arranged opposite to each other along the height direction of the workbench (1). A limiting groove (11) is provided on the workbench (1), and a pushing block (6) is provided on the lower surface of the pushing plate (21) and slides in the limiting groove (11). The pushing mechanism (22) includes a pushing component (221) disposed in the workbench (1) for driving the pushing block (6) to rise and fall, and a moving component (222) for driving the pushing block (6) to move along the fabric conveying direction. The pushing assembly (221) includes a cam (223) for driving the push block (6) to rise and fall, a rotating rod (224) for driving the cam (223) to rotate, and a drive unit (225) installed in the worktable (1) for driving the rotating rod (224) to rotate. The moving component (222) includes a guide rod (226) disposed on the push block (6) and a guide plate (227) installed in the worktable (1). The guide plate (227) has a guide groove (228). The guide rod (226) is located in the guide groove (228) and moves up and down and moves along the guide groove (228). When the guide rod (226) is at the highest position of the guide groove (228), the cam (223) pushes the push plate (21) to press against the lower surface of the fabric.

2. The synchronous feeding structure for a sewing machine according to claim 1, characterized in that: The push plate (21) and the pressing plate (41) are both provided with anti-slip teeth (5) on their opposite sides.

3. The synchronous feeding structure for a sewing machine according to claim 1, characterized in that: The workbench (1) is provided with a conveying device (7), which includes a conveyor belt (71) rotatably fitted on the workbench (1) for conveying the fabric, a conveyor roller (72) for driving the conveyor belt (71) to rotate, and a rotating mechanism (73) for driving the conveyor roller (72) to rotate.

4. The synchronous feeding structure for a sewing machine according to claim 3, characterized in that: The rotating mechanism (73) includes a rotating component (731) for driving the conveying roller (72) to rotate and a linkage component (732) disposed on the rotating rod (224) for driving the rotating component (731) to rotate.

5. The synchronous feeding structure for a sewing machine according to claim 1, characterized in that: The drive mechanism (42) includes a lifting assembly (421) for driving the pressing plate (41) to rise and fall, and a moving assembly (422) disposed on the machine head (3) for driving the lifting assembly (421) to move.

6. A method of using a synchronous feeding structure for a sewing machine, characterized in that: The synchronous feeding structure for a sewing machine according to any one of claims 1-5 includes the following: Clamping: Place the fabric between the push plate (21) and the pressing plate (41), start the push mechanism (22) to drive the push plate (21) to rise, start the drive mechanism (42) to drive the pressing plate (41) to fall, and clamp the fabric. Pushing: At the same time, the pushing mechanism (22) drives the pushing plate (21) to move, and the driving mechanism (42) drives the pressing plate (41) to move, pushing the fabric.

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