Top fly machine

Abstract

The utility model discloses a top fly machine, which relates to the technical field of sewing machines and comprises a workbench provided with a top fly processing area for placing cloth. The sewing mechanism comprises a machine head and an X-direction driving assembly, and the X-direction driving assembly is used for driving the machine head to slide in the X direction; the cutting mechanism is arranged above the front fly machining area and comprises a first cutting driving assembly, a second cutting driving assembly, a linear cutting knife and an angle knife, the first cutting driving assembly is used for driving the linear cutting knife to vertically ascend and descend, and the second cutting driving assembly is used for driving the angle knife to vertically ascend and descend; the presser foot mechanism can be pressed down above the cloth in the front fly processing area to drag the cloth to walk in the Y direction. According to the utility model, a single sewing needle can be adopted to sew on cloth according to a U-shaped track, the cost of a machine head is reduced, a Y-shaped kerf can be processed, and the production requirement is met.

Description

Technical Field

[0001] This utility model relates to the technical field of sewing machines, and in particular to a placket sewing machine. Background Technology

[0002] Clothing often features plackets at the neckline, hem, or other openings or slits. Some plackets require sewing a U-shaped stitch around the fabric, followed by cutting a Y-shaped slit within the U-shaped seam. Traditionally, this involved manual sewing and cutting, resulting in low efficiency and inconsistent quality. With advancements in garment manufacturing technology, placket machines capable of automatically sewing and cutting plackets have become increasingly common in the garment industry.

[0003] Chinese utility model patent CN117684332A discloses a fully automatic placket machine with a fabric feeding function. This placket machine moves the fabric via a pressure plate. After moving a certain distance, the fabric reaches a negative pressure positioning area, where it is attracted and fixed. Then, a belt conveyor moves the presser foot, which presses the fabric firmly. A sewing machine then sews the placket together. After sewing, a cutting device cuts a small opening at one end of the fabric to form the placket.

[0004] In the above scheme, the sewing machine head is equipped with two sewing needles. The fabric is fixed in the negative pressure positioning area. The machine head moves horizontally in a straight line. The two sewing needles sew the two sides of the placket at the same time, but they cannot sew a U-shaped seam. In addition, the machine head needs to be equipped with two sets of sewing mechanisms to match the two sewing needles, which increases the cost of the machine head. The cutting device can only cut a small opening at one end on the fabric, but cannot cut a Y-shaped slit. Utility Model Content

[0005] The purpose of this invention is to provide a placket sewing machine that can use a single sewing needle to sew on the fabric in a U-shaped trajectory, reducing the cost of the machine head, and can also process Y-shaped cuts to meet production needs.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] This utility model provides a placket machine, the placket machine comprising:

[0008] A workbench having a placket processing area for placing fabric;

[0009] A sewing mechanism, comprising a sewing head and an X-axis drive assembly, wherein the sewing head is disposed in the placket processing area and is provided with a sewing needle, and the X-axis drive assembly is used to drive the sewing head to slide along the X-axis;

[0010] A cutting mechanism is disposed above the placket processing area. The cutting mechanism includes a first cutting drive assembly, a second cutting drive assembly, and straight cutting blades and corner blades arranged at intervals along the Y direction. The first cutting drive assembly is used to drive the straight cutting blades to move vertically up and down, and the second cutting drive assembly is used to drive the corner blades to move vertically up and down. The X direction and the Y direction are two orthogonal directions in the horizontal plane.

[0011] A presser foot mechanism is used to press the fabric and drag it along the Y direction.

[0012] Furthermore, the machine head is provided with a needle plate that cooperates with the sewing needle. The needle plate is elongated, and the placket processing area is provided with a sliding groove along the X direction. The needle plate can slide along the X direction and cooperate with the sliding groove.

[0013] Furthermore, the X-axis drive assembly includes an X-axis drive motor, an X-axis drive screw, and an X-axis screw nut; the X-axis drive motor is fixedly mounted on the worktable, the X-axis drive screw is connected to the rotating shaft of the X-axis drive motor, and the X-axis screw nut is threadedly fitted onto the X-axis drive screw; the X-axis screw nut is fixedly connected to the machine head.

[0014] Furthermore, a cutting base is fixedly installed above the placket processing area. The first cutting drive assembly includes a rotary motor, a curved arm, and a reciprocating slide. The rotary motor is fixed to the cutting base. The curved arm is eccentrically rotatably connected to the rotating shaft of the rotary motor. The end of the curved arm away from the rotary motor is rotatably connected to the reciprocating slide. The reciprocating slide is vertically slidably installed on the cutting base. The linear cutting blade is connected to the lower side of the reciprocating slide.

[0015] Furthermore, a cutting base is fixedly installed above the placket processing area. The second cutting drive assembly includes a vertical cutting cylinder and a corner cutter holder. The cylinder body of the vertical cutting cylinder is fixed to the cutting base, the piston rod of the vertical cutting cylinder is connected to the corner cutter holder, and the corner cutter is fixedly installed on the lower side of the corner cutter holder.

[0016] Furthermore, the angle cutter includes a first blade, a first connecting block, a second blade, and a second connecting block. The opposing sides of the first blade and the second blade are closely fitted together, and the first blade and the second blade are set at an angle. The first blade is fixedly connected to the first connecting block, and the second blade is fixedly connected to the second connecting block. The angle cutter holder has an arc-shaped first connecting hole, and the first connecting block has a first threaded hole aligned with the first connecting hole. The first threaded hole is fitted with a connecting bolt that passes through the first connecting hole.

[0017] Furthermore, both the first blade and the second blade are pointed in a shape that gradually tapers from top to bottom, and the tip angle of both the first blade and the second blade is ≤40°.

[0018] Furthermore, the placket processing area is provided with a pad, and the pad has a first clearance groove corresponding to the straight cutting blade and a second clearance groove corresponding to the corner blade.

[0019] Furthermore, the Y-axis drive assembly includes a Y-axis drive motor, a transmission wheel set, and a transmission belt. The Y-axis drive motor is fixedly mounted on the worktable. The transmission wheel set is connected to the rotating shaft of the Y-axis drive motor and the transmission belt. The transmission belt is arranged along the Y-axis, and the pressure rod is connected to the transmission belt.

[0020] Furthermore, the presser foot mechanism includes a presser rod, a lower presser, and a Y-axis drive assembly. The presser rod is disposed on the worktable and can reciprocate along the Y-axis under the drive of the Y-axis drive assembly. The lower presser is connected to the presser rod and can drive the presser rod to press down on the fabric in the placket processing area or drive the presser rod to move up away from the fabric. Two presser rods are arranged parallel to each other. The presser foot mechanism also includes an X-axis adjustment assembly, which is connected to the two presser rods and can drive the two presser rods to move towards or away from each other along the X-axis.

[0021] Furthermore, the workbench also has a loading area with multiple negative pressure adsorption holes; a crossbeam, a pressure frame assembly, and an X-axis traveling drive are arranged above the workbench, with the crossbeam extending above the loading area and the placket processing area; the pressure frame assembly includes a support plate and a lifting drive, the lifting drive being able to slide along the crossbeam under the drive of the X-axis traveling drive, and the support plate being connected to the lifting drive and being able to move vertically up and down under the drive of the lifting drive.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. In the placket sewing machine of this utility model, the fabric is placed in the placket processing area, and the presser foot mechanism presses down to press the fabric firmly onto the placket processing area. The presser foot mechanism drives the fabric to move linearly along the Y direction. At this time, the sewing needle on the sewing head is in a fixed position and performs sewing operations, thereby sewing a Y-axis edge of a U-shaped sewing track on the fabric. Subsequently, the X-axis drive assembly drives the sewing head to move along the X direction, so that the sewing head sews an X-axis edge of a U-shaped sewing track on the fabric. Then, the presser foot mechanism drives the fabric to move linearly in the opposite direction along the Y direction. At this time, the sewing needle on the sewing head is in a fixed position. The sewing operation is performed to sew another Y-axis edge of the U-shaped sewing track onto the fabric; thus, the placket machine can achieve U-shaped track sewing of the placket, and the machine head only needs to be equipped with a sewing needle and a sewing mechanism, saving the cost of the machine head; when the fabric moves along the Y-axis, the first cutting drive assembly drives the straight cutting blade to rise and fall vertically, thereby cutting a straight slit on the fabric. Finally, the second cutting drive assembly drives the corner blade to fall, cutting an angled (V-shaped) slit at the end of the straight slit on the fabric, thereby obtaining a Y-shaped slit to meet production requirements.

[0024] 2. When the machine head is sewing, the sewing needle and the needle plate work together; the needle plate is long and slides in the sliding groove set in the X direction, thereby reducing the contact area between the needle plate and the fabric while satisfying the X-direction movement of the machine head, and reducing the probability that the friction force will cause the fabric to move in the X direction when the needle plate moves.

[0025] 3. A cutting base is installed above the placket processing area. A rotating motor is installed on the cutting base. The rotating motor drives the eccentric movement of the curved arm. The curved arm pushes and pulls the reciprocating slide along the cutting base vertically, thereby driving the straight cutting blade to move vertically up and down for cutting, making the cutting of fabric more stable and smooth.

[0026] 4. A vertical cutting cylinder is installed on the cutting base. The piston rod of the vertical cutting cylinder drives the corner knife holder and the corner knife to move vertically up and down, so as to cut an angled slit in the fabric.

[0027] 5. The first blade of the corner cutter is connected to the corner cutter holder via the first connecting block, and the second blade is connected to the corner cutter holder via the second connecting block. The first connecting block and the corner cutter holder are connected by a connecting bolt passing through the first threaded hole and the arc-shaped first connecting hole. By adjusting the position of the connecting bolt in the first connecting hole, the included angle between the first blade and the second blade can be adjusted, thereby adjusting the angle of the corner cutter and changing the cutting width of the corner cutter to meet the processing requirements of different flaps.

[0028] 6. Both the first and second blades are pointed and gradually narrow from top to bottom, so that the lower end of the corner blade forms a sharp angle; the tip angle of both the first and second blades is ≤40° to ensure the sharpness of the lower end of the corner blade, so that the corner blade can concentrate stress to cut the fabric.

[0029] 7. The pad is provided with a first clearance groove and a second clearance groove. When cutting the slit, the straight cutting blade cuts through the fabric and then inserts into the first clearance groove, and the corner blade cuts through the fabric and then inserts into the second clearance groove. In this way, while maintaining the support of the fabric so that the cutting mechanism can cut the slit, this solution can reduce the wear of the pad, the straight cutting blade and the corner blade, and improve the service life of the cutting mechanism compared with the traditional pad without clearance grooves.

[0030] 8. There are two pressure bars. When pressing the fabric, the two pressure bars are pressed on both sides of the placket. The X-axis adjustment component can adjust the distance between the two pressure bars to meet the processing requirements of different plackets. At the same time, after the two pressure bars are pressed on the fabric, the X-axis adjustment component can drive the two pressure bars to move in opposite directions along the X-axis to tension the fabric between the two pressure bars, which facilitates the sewing and cutting of the placket.

[0031] 9. A loading area is set up on the workbench. While the previous piece of fabric is being processed for the placket, the next piece of fabric can be loaded in the loading area, improving processing efficiency. The fabric is adsorbed onto the loading area through negative pressure suction holes so that the placket can be stacked on the fabric. After loading is completed, the negative pressure suction is turned off, the lifting drive of the pressure frame assembly drives the pallet to press down the fabric, and the X-axis travel drive drives the pressure frame assembly to drag the fabric along the crossbeam to the placket processing area. Then the lifting drive drives the pallet to rise, and the pressure frame assembly travels back to the loading area, thereby realizing the automatic displacement of the fabric and improving processing efficiency. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of a placket machine according to an embodiment of the present invention. Figure 1 .

[0033] Figure 2 This is a left-side view of the sewing mechanism and workbench according to an embodiment of the present invention.

[0034] Figure 3 This is a three-dimensional structural diagram of a sewing mechanism according to an embodiment of the present invention. Figure 1 .

[0035] Figure 4 This is a three-dimensional structural diagram of a sewing mechanism according to an embodiment of the present invention. Figure 2 .

[0036] Figure 5 This is a three-dimensional structural diagram of the presser foot mechanism and longitudinal beam according to an embodiment of this utility model. Figure 1 .

[0037] Figure 6 This is a three-dimensional structural diagram of the presser foot mechanism and longitudinal beam according to an embodiment of this utility model. Figure 2 .

[0038] Figure 7This is a three-dimensional structural diagram of the cutting mechanism according to an embodiment of the present invention. Figure 1 .

[0039] Figure 8 This is a three-dimensional structural diagram of the cutting mechanism according to an embodiment of the present invention. Figure 2 .

[0040] Figure 9 This is an exploded structural diagram of the corner cutter and corner cutter holder according to an embodiment of the present invention.

[0041] Figure 10 This is a three-dimensional structural diagram of the pad according to an embodiment of the present invention.

[0042] Figure 11 This is a three-dimensional structural diagram of a placket machine according to an embodiment of the present invention. Figure 2 .

[0043] In the picture:

[0044] 1000, Placket machine; 100, Worktable; 110, Placket processing area; 111, Sliding groove; 112, Pad; 113, First clearance groove; 114, Second clearance groove; 120, First slide rail; 130, Longitudinal beam; 131, Second slide rail; 140, Crossbeam; 150, Feeding area; 151, Negative pressure suction hole; 200, Sewing mechanism; 210, Machine head; 211, Sewing needle; 212, Needle 220. Plate; 221. X-axis drive assembly; 222. X-axis drive motor; 223. X-axis drive screw; 230. First slider; 300. Presser foot mechanism; 310. Press rod; 311. Drive hole; 320. Lower pressing part; 321. Drive pin; 330. Y-axis drive assembly; 331. Y-axis drive motor; 332. Transmission wheel set; 333. Transmission belt; 340. Y-axis slide block 350. Second slider; 360. X-axis adjustment assembly; 361. Adjustment motor; 362. Adjustment screw; 363. Adjustment nut; 400. Cutting mechanism; 410. First cutting drive assembly; 411. Rotary motor; 412. Crank arm; 413. Reciprocating slide; 414. Third slider; 420. Second cutting drive assembly; 421. Vertical cutting cylinder; 422. Angle blade holder; 423. First connecting hole; 424. Second connecting hole; 430. Straight cutting blade; 440. Angle blade; 441. First blade; 442. Second blade; 443. First connecting block; 444. Second connecting block; 445. First threaded hole; 446. Second threaded hole; 450. Cutting base; 451. Third slide rail; 460. Connecting bolt; 500. Pressure frame assembly; 510. Support plate; 520. Lifting drive component. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings.

[0046] This embodiment discloses a placket machine 1000, with reference to... Figure 1 The placket machine 1000 includes a worktable 100, a sewing mechanism 200, a cutting mechanism 400, and a presser foot mechanism 300. The worktable 100 has a placket processing area 110 for placing fabric. The fabric is sewn in a U-shaped track by the sewing mechanism 200 and cut in a Y-shaped pattern by the cutting mechanism 400 in the placket processing area 110.

[0047] Reference Figure 2 and Figure 3 The sewing mechanism 200 includes a sewing head 210 and an X-axis drive assembly 220. The sewing head 210 is disposed in the placket processing area 110 and is capable of moving along the X-axis on the placket processing area 110. The X-axis drive assembly 220 is used to drive the sewing head 210 to slide along the X-axis.

[0048] In this embodiment, the sewing head 210 is equipped with only one sewing needle 211, and correspondingly only one sewing mechanism is required, which saves the cost of the sewing head 210.

[0049] Reference Figure 4 The sewing machine head 210 is equipped with a needle plate 212, which has needle holes for engaging with the sewing needle 211. In this embodiment, the needle plate 212 is elongated and fixedly connected to the sewing machine head 210. The placket processing area 110 has a sliding groove 111 along the X direction, and the needle plate 212 can slide along the X direction to engage with the sliding groove 111. When the sewing machine head 210 is sewing, the sewing needle 211 engages with the needle plate 212. Thus, when the sewing machine head 210 moves in the X direction, the contact area between the needle plate 212 and the fabric is reduced, decreasing the probability that the friction of the needle plate 212 will cause the fabric to move in the X direction.

[0050] In addition, in other embodiments, the needle plate 212 may also be configured with other suitable shapes.

[0051] Reference Figures 2 to 4 A first slider 230 is connected below the machine head 210, and a first slide rail 120 that cooperates with the slider is provided on the worktable 100. The first slide rail 120 extends along the X direction, and the first slider 230 slides along the X direction and cooperates with the first slide rail 120. Thus, the X-direction drive assembly 220 can stably and smoothly drive the machine head 210 to slide along the X direction on the worktable 100.

[0052] In other embodiments, the slide rail may be positioned below the machine head 210, while the slider is positioned on the worktable 100. In other embodiments, a rail may be positioned on the worktable 100, and a groove cooperating with the rail may be positioned on the machine head 210. In other embodiments, neither the slider nor the slide rail may be provided, allowing the machine head 210 to directly contact the worktable 100.

[0053] Reference Figures 2 to 4 The X-axis drive assembly 220 includes an X-axis drive motor 221, an X-axis drive screw 222, and an X-axis screw nut 223. The X-axis drive motor 221 is fixedly mounted on the worktable 100. The X-axis drive screw 222 is coaxially connected to the shaft of the X-axis drive motor 221 and extends along the X direction. The X-axis screw nut 223 is threaded into the X-axis drive screw 222 and is fixedly connected to the machine head 210. When the X-axis drive motor 221 rotates, the X-axis drive screw 222 rotates, and the worktable 100 circumferentially limits the machine head 210, causing the X-axis drive screw 222 to rotate relative to the X-axis screw nut 223, driving the X-axis screw nut 223 and the machine head 210 to move along the X direction.

[0054] In addition, in other embodiments, the X-axis drive assembly 220 may also be a motor rack and pinion, a motor drive belt 333, a linear cylinder or other suitable linear drive.

[0055] Reference Figure 1 , Figure 5 and Figure 6 The presser foot mechanism 300 is located behind the placket processing area 110 (i.e., away from the operator). In this embodiment, the presser foot mechanism 300 includes a presser bar 310, a lower presser 320, and a Y-axis drive assembly 330. The presser bar 310 is disposed on the worktable 100 and can reciprocate along the Y-axis under the drive of the Y-axis drive assembly 330. The lower presser 320 is connected to the presser bar 310 and can drive the presser bar 310 to press down on the fabric in the placket processing area 110 or drive the presser bar 310 to move away from the fabric.

[0056] When sewing the placket, the fabric is placed in the placket processing area 110. The presser foot mechanism 300's pressing member 320 drives the presser bar 310 to press down, pressing the fabric firmly onto the placket processing area 110. The Y-axis drive assembly 330 drives the presser bar 310 to move backward along the Y-axis, causing the fabric to move linearly along the Y-axis. At this time, the sewing needle 211 on the machine head 210 performs sewing operations in a fixed position, thereby sewing a Y-axis edge of a U-shaped sewing track on the fabric. Subsequently, the X-axis drive assembly 220 drives the machine head 210 to move along the X-axis, causing the machine head 210 to sew an X-axis edge of a U-shaped sewing track on the fabric. Then, the Y-direction drive assembly 330 drives the pressure bar 310 to move in the opposite (forward) direction along the Y direction, causing the fabric to move in a straight line in the opposite direction along the Y direction. At this time, the sewing needle 211 on the machine head 210 performs sewing operations in a fixed position, thereby sewing another Y-direction edge of the U-shaped sewing track on the fabric. Thus, the placket machine 1000 can realize the U-shaped track sewing of the placket to meet production needs.

[0057] Reference Figure 5 and Figure 6 The Y-axis drive assembly 330 includes a Y-axis drive motor 331, a transmission wheel set 332, and a transmission belt 333. The Y-axis drive motor 331 is fixedly mounted on the worktable 100, and the transmission wheel set 332 is connected to the shaft of the Y-axis drive motor 331 and the transmission belt 333. The transmission belt 333 is arranged along the Y-axis, and the pressure rod 310 is connected to the transmission belt 333.

[0058] Specifically, a longitudinal beam 130 is fixedly installed above the rear side of the placket processing area 110 on the workbench 100, extending along the Y direction. The transmission pulley set 332 includes two pulleys, one large and one small. The small pulley is fixedly connected to the shaft of the Y-direction drive motor 331, and the large pulley is connected to the small pulley via a toothed belt. Two toothed pulleys are rotatably installed at both ends of the longitudinal beam 130, one of which is coaxially connected to the large pulley. The transmission belt 333 is synchronously sleeved on the two toothed pulleys. Thus, when the Y-direction drive motor 331 rotates, it drives the two pulleys to rotate, which in turn drives the toothed pulley to rotate, thereby causing the transmission belt 333 to move along the Y direction to move the pressure rod 310.

[0059] A second slide rail 131 is provided along the length of the longitudinal beam 130, and a Y-axis slide block 340 is connected above the pressure rod 310. A second slider 350 is connected to the Y-axis slide rail and slides in a sliding engagement with the second slide rail 131. A transmission belt 333 is fixedly connected to the Y-axis slide block 340. Thus, the Y-axis slide block 340 is guided by the cooperation of the second slide rail 131 and the second slider 350, making the Y-axis slide block 340 and the pressure rod 310 more stable when sliding in the Y direction.

[0060] In this embodiment, two pressure rods 310 are arranged in parallel at intervals. When pressing the fabric, the two pressure rods 310 are pressed on both sides of the fabric placket, making the pressure rods 310 more stable when pressing the fabric and moving the fabric.

[0061] Among them, reference Figure 5 and Figure 6 The distance between the two presser rods 310 can be adjusted along the X-direction. Specifically, the presser foot mechanism 300 also includes an X-direction adjustment component 360, which is connected to the two presser rods 310 and can drive the two presser rods 310 to move towards or away from each other along the X-direction. Thus, the distance between the two presser rods 310 can be adjusted by the X-direction adjustment component 360 to meet the processing requirements of different plackets. At the same time, after the two presser rods 310 are pressed onto the fabric, the X-direction adjustment component 360 can drive the two presser rods 310 to move away from each other along the X-direction to tension the fabric between the two presser rods 310, thereby facilitating the sewing and cutting of the placket.

[0062] Specifically, in this embodiment, the X-axis adjustment assembly 360 includes an adjustment motor 361, an adjustment screw 362, and an adjustment nut 363. The adjustment motor 361 is fixedly mounted on the worktable 100, and the adjustment screw 362 is coaxially connected to the rotating shaft of the adjustment motor 361. One adjustment nut 363 is fixedly mounted on each pressure rod 310. The adjustment screw 362 is a double-ended screw, and the two adjustment nuts 363 are threaded onto both ends of the adjustment screw 362. Therefore, when the adjustment motor 361 rotates, the adjustment screw 362 rotates. However, under the limiting position of the lower pressure member 320, the pressure rods 310 and the adjustment nuts 363 do not rotate with the adjustment screw 362. Thus, the adjustment screw 362 drives the two adjustment nuts 363 to move towards or away from each other, thereby causing the two pressure rods 310 to move towards or away from each other.

[0063] In this embodiment, bearings are sleeved at both ends of the adjusting screw 362, and the two bearings are installed in the two bearing holes of the Y-axis slide block 340, thereby making the adjusting screw 362 rotate more stably and smoothly.

[0064] In this embodiment, the pressing member 320 includes a vertically arranged cylinder. Two pressing members 320 are provided, each connected to a corresponding pressing rod 310. Specifically, the pressing member 320 is located behind the adjusting screw 362. The piston rod of the pressing member 320 is connected to a horizontally arranged driving pin 321. The rear end of the pressing rod 310 has an oblong driving hole 311 extending along the Y direction. The driving pin 321 is inserted into the driving hole 311 and can slide along the length of the driving hole 311. Therefore, when the pressing member 320 presses down, the rear end of the driving rod 310 moves downward, and the pressing rod 310 rotates around the adjusting screw 362, causing the front end of the pressing rod 310 to tilt upward and leave the fabric. When the lower pressure member 320 moves upward, it drives the rear end of the pressure rod 310 to move upward. The pressure rod 310 rotates around the adjusting screw 362 as a fulcrum, and the front end of the pressure rod 310 presses down and clamps the fabric. This clamping method ensures that the fabric is clamped regardless of whether the pressure rod 310 is horizontally positioned, reducing the processing accuracy requirements of the pressure rod 310, and the pressure rod 310 exerts greater downward pressure on the fabric. In addition, in other embodiments, the pressure rod 310 can also be directly fixedly connected to the lower pressure member 320, and the lower pressure member 320 vertically drives the pressure rod 310 to rise and fall. In other embodiments, the lower pressure member 320 can also be a motor screw, gear rack, or other suitable linear drive component.

[0065] Reference Figure 1 and Figure 7 The cutting mechanism 400 is disposed above the placket processing area 110. The cutting mechanism 400 includes a first cutting drive assembly 410, a second cutting drive assembly 420, a straight cutting blade 430, and a corner blade 440. The straight cutting blade 430 and the corner blade 440 are arranged at intervals along the Y direction. Specifically, in this embodiment, the straight cutting blade 430 is disposed behind the corner blade 440. The first cutting drive assembly 410 is connected to the straight cutting blade 430 and is used to drive the straight cutting blade 430 to move vertically. The second cutting drive assembly 420 is connected to the corner blade 440 and is used to drive the corner blade 440 to move vertically.

[0066] As the pressure bar 310 moves the fabric along the Y-axis, the first cutting drive assembly 410 drives the straight cutting blade 430 to move vertically up and down, thereby cutting a straight slit in the fabric. After the straight slit is cut, the second cutting drive assembly 420 drives the angle blade 440 to descend, cutting an angled (V-shaped) slit at the end of the straight slit in the fabric, thus obtaining a Y-shaped slit to meet production requirements.

[0067] It should be noted that the X and Y directions are two orthogonal directions in the horizontal plane. In this embodiment, the left-right direction is the X direction and the front-back direction is the Y direction.

[0068] Reference Figure 1 , Figure 7 and Figure 8 A cutting base 450 is fixedly installed above the placket processing area 110. Specifically, in this embodiment, a crossbeam 140 is fixedly installed above the worktable 100 along the X direction, and the cutting base 450 is fixedly connected to the crossbeam 140. In other embodiments, the cutting base 450 may also be fixed to the machine head 210 or other support components supported on the worktable 100.

[0069] Reference Figure 7 and Figure 8 The first cutting drive assembly 410 includes a rotary motor 411, a crank arm 412, and a reciprocating slide 413. The rotary motor 411 is fixed to the cutting base 450, the crank arm 412 is eccentrically rotatably connected to the rotating shaft of the rotary motor 411, and the end of the crank arm 412 away from the rotary motor 411 is rotatably connected to the reciprocating slide 413. The reciprocating slide 413 is vertically slidably disposed on the cutting base 450, and a straight cutting blade 430 is connected to the lower side of the reciprocating slide 413.

[0070] When the linear cutting blade 430 is performing a cutting operation, the rotating motor 411 drives the crank arm 412 to move eccentrically. The crank arm 412 pushes and pulls the reciprocating slide block 413 to slide vertically back and forth along the cutting base 450, thereby driving the linear cutting blade 430 to move vertically back and forth to cut, making the cutting of fabric more stable and smooth.

[0071] In addition, in other embodiments, the first cutting drive assembly 410 may also employ a cylinder or other suitable linear drive.

[0072] In this embodiment, a vertically extending third slide rail 451 is provided on the cutting base 450, and a reciprocating slide 413 is connected to a third slider 414 that slides and engages with the third slide rail 451. Thus, the cooperation between the third slide rail 451 and the third slider 414 guides and limits the reciprocating slide 413, making the reciprocating slide 413 more stable when sliding vertically on the cutting base 450.

[0073] The second cutting drive assembly 420 includes a vertical cutting cylinder 421 and a corner cutter holder 422. The cylinder body of the vertical cutting cylinder 421 is fixed to the cutting base 450, and the piston rod of the vertical cutting cylinder 421 is connected to the corner cutter holder 422. The corner cutter 440 is fixedly disposed on the lower side of the corner cutter holder 422. When the corner cutter 440 performs cutting operations, the piston rod of the vertical cutting cylinder 421 drives the corner cutter holder 422 and the corner cutter 440 to move vertically up and down to cut an angled slit in the fabric.

[0074] In addition, in other embodiments, the second cutting drive assembly 420 may also employ other suitable linear drive components.

[0075] Reference Figure 9In this embodiment, the corner cutter 440 includes a first blade 441, a first connecting block 443, a second blade 442, and a second connecting block 444. The opposing sides of the first blade 441 and the second blade 442 are closely fitted together, such that the first blade 441 and the second blade 442 are arranged at a V-shaped angle. The first blade 441 is fixedly connected to the first connecting block 443, the second blade 442 is fixedly connected to the second connecting block 444, and the first connecting block 443 and the second connecting block 444 are fixedly connected to the corner cutter holder 422.

[0076] In this embodiment, the corner cutter holder 422 has an arc-shaped first connecting hole 423. The first connecting hole 423 is elongated and coaxially arranged with the side of the first blade 441 and the second blade 442 adjacent to it. The first connecting block 443 has a first threaded hole 445 aligned with the first connecting hole 423. The first threaded hole 445 is fitted with a connecting bolt 460 passing through the first connecting hole 423. Thus, by adjusting the position of the connecting bolt 460 in the first connecting hole 423, the angle between the first blade 441 and the second blade 442 can be adjusted, thereby adjusting the angle of the corner cutter 440 and changing the cutting width of the corner cutter 440 to meet the processing requirements of different flaps.

[0077] Preferably, in some embodiments, the angle cutter holder 422 also has an arc-shaped second connecting hole 424. The second connecting hole 424 is elongated and coaxially arranged with the side of the first blade 441 and the second blade 442 adjacent to it. The second connecting hole 424 and the first connecting hole 423 are symmetrically arranged around the Y-axis. The second connecting block 444 has a second threaded hole 446 aligned with the second connecting hole 424. The second threaded hole 446 is fitted with a connecting bolt 460 passing through the second connecting hole 424. Thus, by adjusting the position of the connecting bolt 460 in the second connecting hole 424, the included angle between the second blade 442 and the first blade 441 can be adjusted, and the angle of the angle cutter 440 can be further adjusted.

[0078] In this embodiment, two first connecting holes 423 are provided, with different radii of curvature. Correspondingly, two first threaded holes 445 are provided, and the angle cutter holder 422 and the first connecting block 443 are connected by two connecting bolts 460. Two second connecting holes 424 are provided, with different radii of curvature. Correspondingly, two second threaded holes 446 are provided, and the angle cutter holder 422 and the second connecting block 444 are connected by two connecting bolts 460. This makes it difficult for the first connecting block 443 and the second connecting block 444 to rotate on their own after being connected to the angle cutter holder 422, ensuring the stability of the angle cutter 440 during cutting.

[0079] In this embodiment, both the first blade 441 and the second blade 442 are pointed, gradually tapering from top to bottom, and the tip angle of both blades (i.e., the angle between the side of the first blade 441 and the side of the second blade 442 that is opposite to each other and the side that is in close contact with each other) is ≤40°. This results in a sharp angle at the lower end of the corner blade 440, ensuring its sharpness and facilitating concentrated stress to cut the fabric. The cutting edge of the corner blade 440 is located on the side opposite to the first blade 441 and the second blade 442, so as to contact and cut the fabric.

[0080] In other embodiments, the corner blade 440 may also be of other suitable shapes.

[0081] Reference Figure 4 and Figure 10 The placket processing area 110 is provided with a pad 112, which is placed under the fabric to support the fabric for cutting by the cutting mechanism 400.

[0082] The pad 112 has a first clearance groove 113 corresponding to the straight cutting blade 430 and a second clearance groove 114 corresponding to the corner blade 440. When cutting the slit, the straight cutting blade 430 cuts through the fabric and then inserts into the first clearance groove, and the corner blade 440 cuts through the fabric and then inserts into the second clearance groove. Thus, while maintaining support for the fabric so that the cutting mechanism 400 can cut the slit, compared to a traditional pad 112 without clearance grooves, this embodiment can reduce the wear of the pad 112, the straight cutting blade 430, and the corner blade 440. This avoids damage to the pad 112 after multiple cuts, preventing pits from forming and affecting cutting, or wear and tear on the straight cutting blade 430 and the corner blade 440 that makes it difficult to cut the fabric, thereby increasing the service life of the cutting mechanism 400.

[0083] The pad 112 is detachably installed in the placket processing area 110 so that different pads 112 can be replaced to match the corner cutters 440 at different angles.

[0084] In other embodiments, the pad 112 may be omitted, and a clearance area may be directly provided on the worktable 100 below the straight cutting blade 430 and the angle cutting blade 440. In other embodiments, the clearance groove may not be provided on the pad 112.

[0085] Reference Figure 1 and Figure 11 In this embodiment, the workbench 100 also has a loading area 150. Specifically, the loading area 150 is located on the left or right side of the placket processing area 110, and the crossbeam 140 spans above the loading area 150 and the placket processing area 110. While the previous piece of fabric is being processed for placket, the next piece of fabric can be loaded into the loading area 150, improving processing efficiency.

[0086] The feeding area 150 is equipped with multiple negative pressure adsorption holes 151, which are connected to a vacuum machine via pipelines. The fabric is adsorbed onto the feeding area 150 through the negative pressure adsorption holes 151 so that the placket can be stacked on the fabric.

[0087] Above the workbench 100, a frame pressing assembly 500 and an X-axis travel drive are also provided. The frame pressing assembly 500 includes a support plate 510 and a lifting drive 520. The lifting drive 520 can slide along the crossbeam 140 under the drive of the X-axis travel drive. The support plate 510 is connected to the lifting drive 520 and can be vertically lifted and lowered under the drive of the lifting drive 520. Thus, after the fabric is loaded into the feeding area 150, the negative pressure adsorption is turned off. The lifting drive 520 of the frame pressing assembly 500 drives the support plate 510 to press down the fabric. The X-axis travel drive drives the frame pressing assembly 500 to drag the fabric along the crossbeam 140 to the placket processing area 110. Then, the lifting drive 520 drives the support plate 510 to rise, and the frame pressing assembly 500 travels back to the feeding area 150, thereby realizing the automatic displacement of the fabric and improving processing efficiency.

[0088] In this embodiment, the lifting drive 520 can be a cylinder, a motor lead screw, a gear rack, a transmission belt 333, or other suitable linear drive components. The X-axis travel drive can be a motor lead screw, a gear rack, a transmission belt 333, or other suitable linear drive components.

[0089] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A placket machine, characterized in that, The flap machine (1000) includes: A workbench (100) having a placket processing area (110) for placing fabric; A sewing mechanism (200) includes a sewing head (210) and an X-axis drive assembly (220). The sewing head (210) is disposed in the placket processing area (110). The sewing head (210) is provided with a sewing needle (211). The X-axis drive assembly (220) is used to drive the sewing head (210) to slide along the X-axis. A cutting mechanism (400) is disposed above the placket processing area (110). The cutting mechanism (400) includes a first cutting drive assembly (410), a second cutting drive assembly (420), and straight cutting blades (430) and angle blades (440) arranged at intervals along the Y direction. The first cutting drive assembly (410) is used to drive the straight cutting blades (430) to move vertically up and down, and the second cutting drive assembly (420) is used to drive the angle blades (440) to move vertically up and down. The X direction and the Y direction are two orthogonal directions in the horizontal plane. A presser foot mechanism (300) is used to press the fabric and drag the fabric along the Y direction.

2. The placket machine as described in claim 1, characterized in that, The machine head (210) is provided with a needle plate (212) that cooperates with the sewing needle (211). The needle plate (212) is elongated. The placket processing area (110) is provided with a sliding groove (111) along the X direction. The needle plate (212) can slide along the X direction and cooperate with the sliding groove (111).

3. A placket machine as described in claim 1 or 2, characterized in that, The X-axis drive assembly (220) includes an X-axis drive motor (221), an X-axis drive screw (222), and an X-axis screw nut (223); the X-axis drive motor (221) is fixedly mounted on the worktable (100), the X-axis drive screw (222) is connected to the shaft of the X-axis drive motor (221), and the X-axis screw nut (223) is threadedly fitted to the X-axis drive screw (222); the X-axis screw nut (223) is fixedly connected to the machine head (210).

4. A placket machine as described in claim 1, characterized in that, A cutting base (450) is fixedly installed above the placket processing area (110). The first cutting drive assembly (410) includes a rotary motor (411), a curved arm (412), and a reciprocating slide (413). The rotary motor (411) is fixed to the cutting base (450). The curved arm (412) is eccentrically rotatably connected to the rotating shaft of the rotary motor (411). One end of the curved arm (412) away from the rotary motor (411) is rotatably connected to the reciprocating slide (413). The reciprocating slide (413) is vertically slidably installed on the cutting base (450). The straight cutting blade (430) is connected to the lower side of the reciprocating slide (413).

5. A placket machine as described in claim 1, characterized in that, A cutting base (450) is fixedly installed above the placket processing area (110). The second cutting drive assembly (420) includes a vertical cutting cylinder (421) and a corner knife holder (422). The cylinder body of the vertical cutting cylinder (421) is fixed to the cutting base (450). The piston rod of the vertical cutting cylinder (421) is connected to the corner knife holder (422). The corner knife (440) is fixedly installed on the lower side of the corner knife holder (422).

6. A placket machine as described in claim 5, characterized in that, The corner cutter (440) includes a first blade (441), a first connecting block (443), a second blade (442), and a second connecting block (444). The first blade (441) and the second blade (442) are close to each other on opposite sides and are set at an angle. The first blade (441) is fixedly connected to the first connecting block (443), and the second blade (442) is fixedly connected to the second connecting block (444). The corner cutter holder (422) has an arc-shaped first connecting hole (423), and the first connecting block (443) has a first threaded hole (445) aligned with the first connecting hole (423). The first threaded hole (445) is fitted with a connecting bolt (460) that passes through the first connecting hole (423).

7. A placket machine as described in claim 6, characterized in that, Both the first blade (441) and the second blade (442) are pointed and gradually narrow from top to bottom, and the tip angle of both the first blade (441) and the second blade (442) is ≤40°.

8. A placket machine as described in claim 1, characterized in that, The placket processing area (110) is provided with a pad (112), and the pad (112) has a first clearance groove (113) corresponding to the straight cutting blade (430) and a second clearance groove (114) corresponding to the corner blade (440).

9. A placket machine as described in claim 8, characterized in that, The presser foot mechanism (300) includes a presser bar (310), a lower presser (320), and a Y-axis drive assembly (330). The presser bar (310) is disposed on the worktable (100) and can reciprocate along the Y-axis under the drive of the Y-axis drive assembly (330). The lower presser (320) is connected to the presser bar (310) and can drive the presser bar (310) to press down on the fabric in the placket processing area (110) or drive the presser bar (310) to move away from the fabric. Two pressure rods (310) are arranged in parallel at intervals. The pressure foot mechanism (300) also includes an X-axis adjustment component (360). The X-axis adjustment component (360) is connected to the two pressure rods (310) and can drive the two pressure rods (310) to move towards or away from each other in the X direction.

10. A placket machine as described in claim 1, characterized in that, The workbench (100) also has a loading area (150), which is provided with a plurality of negative pressure adsorption holes (151); a crossbeam (140), a pressing frame assembly (500) and an X-axis walking drive are provided above the workbench (100), and the crossbeam (140) extends above the loading area (150) and the placket processing area (110); the pressing frame assembly (500) includes a support plate (510) and a lifting drive (520), the lifting drive (520) can slide along the crossbeam (140) under the drive of the X-axis walking drive, and the support plate (510) is connected to the lifting drive (520) and can be vertically lifted and lowered under the drive of the lifting drive (520).

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