Anti-curling sewing equipment for processing underwear fabrics and processing method thereof

Abstract

The present invention proposes an anti-curling sewing device for processing underwear fabrics and a processing method thereof, so as to solve the problems that the existing smoothing device is large in size and inconvenient to cooperate with the sewing machine. At the same time, the anti-curling device and the sewing machine are basically fixed to the sewing machine by bolts or screws, which not only requires drilling holes on the sewing machine, but also is inconvenient to move the anti-curling device in the later stage. The present invention comprises a sewing machine body, which comprises a support frame and a sewing machine head located on the top of the support frame, and the sewing machine head is provided with a sewing needle that moves up and down, and also comprises a fixing device, a height adjustment component and an anti-curling device. Through the settings of the smoothing part, the holding part and the bending part, the smoothing part guides and smoothes the rolled edge during the movement of the fabric, and the holding part continuously shapes the flattened fabric. This structural constraint greatly improves the smoothing effect of the fabric and avoids problems such as overlapping or folding of the fabric under the action of the pressing plate.

Description

Technical Field

[0001] The present invention relates to the technical field of underwear sewing equipment, in particular to an anti-curling sewing equipment for processing underwear fabrics and a processing method thereof. Background Art

[0002] In the production of underwear, sewing machines are used to sew and connect various parts of the underwear. During use, the sewing machines are mostly conventional manual sewing machines.

[0003] The Chinese patent application number CN202222097285.8 discloses an anti-curling sewing edge retaining device, which includes a fixing device, a rotating device and a cloth limiting device; the cloth limiting device is installed at one end of the rotating device and corresponds to the sewing machine presser foot, the fixing device is installed at the other end of the rotating device, and the other end of the fixing device is fixedly connected to the sewing machine plate, and the adjusting pressing plate naturally flattens the edges of woolen sweater pieces to be sewn, easily curled nylon pieces or special curled fabrics under the action of a torsion spring. After needle movement, the stitches are straight and even, and the loosening of the third adjusting screw and the base plate can adjust the lifting and lowering of the pressing plate, which can adapt to the sewing of thin and thick fabrics; improves product quality, saves time and effort for sewing operators, and greatly improves work efficiency; the utility model has a compact structure, is easy to install and adjust, and is suitable for promotion and application in the production of garment enterprises.

[0004] The Chinese patent application number CN202021096140.0 discloses an anti-curling device for cloth processing, comprising an operating table, a support frame and a baffle, wherein one end of the first electric push rod away from the baffle is fixedly connected to a pressure wheel, a movable groove is provided on the top of the operating table, one side of the inner wall of the movable groove is fixedly connected to the second electric push rod, and the bottom of the operating table is fixedly connected to a negative pressure fan, an air supply hose is passed through the outer side of the negative pressure fan, an end of the air supply hose away from the negative pressure fan is passed through and connected to a blowing pipe, and a ventilation nozzle is passed through the surface of the blowing pipe; the utility model has good anti-curling effect, is provided with a negative pressure fan, effectively prevents the cloth from curling, and greatly improves the production quality of cloth processing; and through the coordinated use of the first electric push rod and the second electric push rod, the overall scope of application is expanded so as to be applicable to cloths of different horizontal lengths and longitudinal thicknesses, thereby greatly improving the practicality of the existing anti-curling device.

[0005] The existing underwear fabric anti-curling device still has the following problems:

[0006] 1. Existing fabric anti-curling devices basically use pneumatic or pressure plate methods to smooth the fabric, but the smoothing device is large in size and inconvenient to cooperate with the sewing machine. At the same time, the anti-curling device and the sewing machine are basically fixed with bolts or screws, which not only requires drilling holes on the sewing machine, but also makes it inconvenient to move the anti-curling device later.

[0007] 2. The use of a pressing plate for smoothing is inconvenient to place the fabric under the pressing plate, which affects the workers' production efficiency. At the same time, the height of the pressing plate is not easy to adjust. When the pressing force of the pressing plate on the fabric is too large, the fabric will "twist" during the sewing process, resulting in irregular seams of the underwear, which greatly affects the aesthetics of the underwear. Summary of the Invention

[0008] In view of the above problems, the present invention provides an anti-curling sewing device for processing underwear fabrics and a processing method thereof, which has the advantages of convenient fabric loading, easy adjustment of needle pressing height and better anti-curling effect.

[0009] The technical solution is as follows: the present invention includes a sewing machine body, the sewing machine body includes a support frame and a sewing machine head located on the top of the support frame, the sewing machine head is provided with a sewing needle that moves up and down, and further includes:

[0010] A fixing device, fixed to the top of the support frame and located to the right of the sewing needle, the fixing device is located in the direction of travel of the fabric, and the fixing device includes a shell, a plurality of equally spaced suction cups are provided at the bottom of the shell, and a lifting slot is provided in the middle of the shell;

[0011] A height adjustment assembly is located in the housing and includes a mounting plate that moves up and down in the lifting slot;

[0012] An anti-curling device is located on the mounting plate. The anti-curling device includes a pressure needle assembly rotatably connected to the mounting plate. The pressure needle assembly includes a connecting frame rotatably connected to the mounting plate, and pressure needles are fixedly connected to both ends of the connecting frame.

[0013] Preferably, the anti-curling device further comprises two buckles fixed on the mounting plate, the two buckles are symmetrically distributed and matched with the connecting frame, and the connecting frame is rotationally connected to the mounting plate via a torsion spring.

[0014] Preferably, the connecting frame includes a fixing portion and a bending portion fixedly connected to the pressure pin, the fixing portion matches the buckle, the pressure pin includes a smoothing portion and a retaining portion, the cross-section of the smoothing portion is a rounded trapezoid, the cross-section of the retaining portion is a rounded rectangle, and the smoothing portion is fixedly connected to the bending portion.

[0015] Preferably, the retaining portion of the pressure needle on the front side is an L-shaped structure.

[0016] Preferably, cavities are respectively provided on the front and rear sides of the shell, and pressure extraction grooves connected to the cavities are respectively provided below the two cavities, and multiple branch grooves connected to the suction cups are provided below the pressure extraction grooves, and one end of the pressure extraction groove passes through the cavity and is located on the leftmost side of the cavity.

[0017] Preferably, a piston rod sliding left and right is provided in the cavity, and a fixing plate is fixed on the right side of the two cavities, and a through hole is provided on the fixing plate. The two piston rods pass through one end of the fixing plate to fix the same connecting plate, and two front-to-back symmetrical connecting rods are fixed on the connecting plate, and the two connecting rods pass through one end of the lifting slot to fix the same pressure plate, and a notch is provided in the middle of the pressure plate, and a positioning rod passing through the notch is fixed on the side wall of the lifting slot, and a plurality of equidistant positioning slots are provided on the positioning rod, and a positioning block is rotatably connected to the pressure plate, and the positioning block is connected to the pressure plate by a torsion spring.

[0018] Preferably, the height adjustment assembly also includes an oil bag fixed to the bottom of the mounting plate, a placement groove is provided at the bottom of the lifting groove, the oil bag is located in the placement groove, an equipment cavity is provided on the right side of the shell, an oil storage cylinder is fixedly connected to the equipment cavity, a piston plate that moves up and down is provided inside the oil storage cylinder, a threaded rod is coaxially fixed to the top of the piston plate, a knob is coaxially fixed to one end of the threaded rod passing through the shell, the threaded rod is threadedly connected to the oil storage cylinder, an oil outlet pipe is provided at the bottom of the oil storage cylinder, an oil inlet pipe is provided on the side of the oil bag close to the oil storage cylinder, and the oil outlet pipe is connected to the oil inlet pipe through a hose.

[0019] Preferably, two symmetrically distributed scale plates are fixed on the top of the shell, and vertical scale bars are provided on the scale plates. The threaded rod is rotatably connected to an indicator rod located below the knob, and the end of the indicator rod away from the threaded rod is located between the two scale plates.

[0020] Preferably, the suction cup includes a supporting portion and an adsorption portion, the adsorption portion is in direct contact with the supporting frame, and an annular rubber ring is coaxially fixed to one end of the adsorption portion away from the supporting portion.

[0021] A method for processing underwear fabric to prevent curling is also provided, comprising the following steps:

[0022] Step 1: Place the housing on the support frame and press the positioning block with one finger to disengage the positioning block from the positioning slot;

[0023] Step 2: Press the pressure plate to the right until it feels blocked, and then snap the positioning block into the nearest positioning slot.

[0024] Step 3: Manually detach the connecting frame from the buckle, lay the fabric to be sewn flat on the support frame so that the edge of the fabric can directly contact the shell, and then reconnect the connecting frame to the buckle;

[0025] Step 4: Adjust the height of the press needle by turning the knob. The mounting plate will rise or fall accordingly. During the rotation, you can refer to the position change of the indicator plate on the scale plate.

[0026] Step 5: Use a sewing machine to sew;

[0027] Step 6: Repeat steps 3 and 5 for the same batch of underwear.

[0028] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects:

[0029] 1. Through the settings of the connecting frame, mounting plate and buckle, workers can manually adjust the connecting frame. When the connecting frame and the buckle are matched and engaged, the connecting frame is in a fixed state. When the connecting frame and the buckle are disengaged, the connecting frame rotates to the side away from the fabric under the action of the torsion spring. At this time, the fabric can be directly laid flat on the left side of the shell, and then the connecting frame and the buckle can be buckled together to facilitate the placement of the fabric under the press needle.

[0030] 2. Through the arrangement of the smoothing part, the holding part and the bending part, the smoothing part guides and smoothes the rolled-up edge of the fabric during its movement, and the holding part continuously shapes the flattened fabric. This structural constraint greatly improves the smoothing effect of the fabric and avoids problems such as overlapping or folding of the fabric under the action of the pressing plate.

[0031] 3. Through the shape setting of the front press needle, the front press needle not only has the function of smoothing, but also when the fabric is moving, the L-shaped structure of the retaining part can maximize the avoidance of the problem of curling of the fabric when it comes into contact with the sewing needle, especially for knitted fabrics.

[0032] 4. Compared with the method of using bolts or screws, this method is more efficient and quicker through the settings of piston rod, connecting rod, pressure plate, positioning rod and positioning block. At the same time, considering that the shell can also adjust the sewing width of the fabric to a certain extent, the suction cup fixing method also facilitates the position adjustment of the shell.

[0033] 5. Through the settings of oil bag, placement groove, oil storage cylinder and knob, workers can directly turn the knob, and the threaded rod drives the piston plate to move up and down. This method can not only adjust the height of the press needle, but also achieve a more precise adjustment effect by using threads and oil circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0035] Figure 2 In the present invention Figure 1 A magnified schematic diagram of the structure at point A.

[0036] Figure 3 It is a three-dimensional schematic diagram of the housing and the connecting parts in the present invention.

[0037] Figure 4 It is a three-dimensional schematic diagram of the connecting frame and the pressing needle in the present invention.

[0038] Figure 5 It is a three-dimensional cross-sectional view of the shell in the present invention.

[0039] Figure 6 It is a three-dimensional schematic diagram of the pressure plate and the connecting piece in the present invention.

[0040] Figure 7 It is a three-dimensional schematic diagram of the oil bag and the connecting piece in the present invention.

[0041] Figure 8 It is a three-dimensional schematic diagram of the oil storage cylinder and the connecting parts in the present invention.

[0042] Figure 9 It is a three-dimensional schematic diagram of the rubber ring in the present invention.

[0043] Explanation of the numbers in the schematic diagram:

[0044] 1. Sewing machine body; 2. Support frame; 3. Sewing machine head; 4. Sewing needle; 5. Housing; 6. Suction cup; 7. Lifting groove; 8. Mounting plate; 9. Connecting frame; 10. Press needle; 11. Buckle; 12. Fixing part; 13. Bending part; 14. Smoothing part; 15. Holding part; 16. Cavity; 17. Pressure groove; 18. Support groove; 19. Piston rod; 20. Fixing plate; 21. Connecting plate; 22. Connecting rod; 23. Pressing plate; 24. Positioning rod; 25. Positioning groove; 26. Positioning block; 27. Oil bag; 28. Placement groove; 29. ​​Equipment cavity; 30. Oil storage cylinder; 31. Threaded rod; 32. Knob; 33. Scale plate; 34. Indicator rod; 35. Support part; 36. Adsorption part; 37. Rubber ring. DETAILED DESCRIPTION

[0045] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0046] Depend on Figures 1 to 3 The present invention provides a sewing machine body 1, which includes a support frame 2 and a sewing machine head 3 located on the top of the support frame 2. The sewing machine head 3 is provided with a sewing needle 4 that moves up and down. The above-mentioned equipment is all prior art and will not be described in detail here. It also includes a fixing device, a height adjustment component and an anti-curling device.

[0047] Among them, the fixing device is fixed on the top of the support frame 2 and is located on the right side of the sewing needle 4. The fixing device is located in the moving direction of the cloth. During use, the cloth is located on the left side of the fixing device and the cloth moves forward. The fixing device includes a shell 5. A plurality of equally distributed suction cups 6 are provided at the bottom of the shell 5 for fixing on the support frame 2. A lifting groove 7 is provided in the middle of the shell 5.

[0048] The height adjustment assembly is located inside the shell 5, and the height adjustment assembly includes a mounting plate 8 that moves up and down in the lifting slot 7. It is necessary to further supplement the structure of the mounting plate 8 and the lifting slot 7. A vertical limit slot is provided on the side wall of the lifting slot 7, and a plurality of limit blocks matching the limit slot are fixed at the edge of the mounting plate 8. This is to improve the stability of the mounting plate 8 during the lifting process.

[0049] The anti-curling device is located on the mounting plate 8, and the anti-curling device includes a pressing needle assembly rotatably connected to the mounting plate 8. The pressing needle assembly includes a connecting frame 9 rotatably connected to the mounting plate 8. The connecting frame 9 is a C-shaped structure, and the two ends of the connecting frame 9 are respectively fixedly connected with pressing needles 10. When processing underwear, the fabric is pressed under the pressing needle 10. At this time, the pressing needle 10 has an appropriate downward restraining force on the fabric. During the movement of the fabric, the pressing needle 10 smoothes the curled fabric, especially for knitted fabrics. The effect is particularly obvious, which saves manual operation of the fabric and improves the production efficiency of underwear.

[0050] refer to Figure 3 As shown, considering that most of the existing anti-curling devices adopt gas blowing or pressure plate 23 limiting methods, although there is a certain improvement in the curling of the fabric to a certain extent, it is inconvenient to place the fabric under the pressure plate 23, which reduces the production efficiency of the underwear to a certain extent. Further supplementing the anti-curling device is that the anti-curling device also includes two buckles 11 fixed on the mounting plate 8, the two buckles 11 are symmetrically distributed and matched with the connecting frame 9, and the connecting frame 9 is rotatably connected to the mounting plate 8 through a torsion spring. During use, the worker can manually adjust the connecting frame 9. When the connecting frame 9 is matched and engaged with the buckle 11, the connecting frame 9 is in a fixed state. When the connecting frame 9 is disengaged from the buckle 11, the connecting frame 9 rotates to the side away from the fabric under the action of the torsion spring. At this time, the fabric can be directly spread flat on the left side of the shell 5, and then the connecting frame 9 is buckled with the buckle 11.

[0051] It should be further explained that, during the process of placing the fabric, the shell 5 can be used as a reference. The edge of the fabric is brought into contact with the shell 5 , and the distance between the shell 5 and the sewing needle 4 is adjusted to adjust the sewing width of the fabric.

[0052] refer to Figure 3 and Figure 4As shown, the shape of the connecting frame 9 and the pressing needle 10 is further supplemented by that the connecting frame 9 includes a fixing portion 12 and a bending portion 13 fixedly connected to the pressing needle 10, the fixing portion 12 matches the buckle 11, and in this embodiment, the fixing portion 12 is a round rod structure, and the buckle 11 is provided with a card slot matching the fixing portion 12, and the buckle 11 is made of elastic material, such as plastic or elastic metal. The purpose of providing the bending portion 13 is that when the pressing needle 10 is at the lowest horizontal position, the pressing needle 10 contacts the support frame 2, and the pressing needle 10 includes a smoothing The smoothing portion 14 and the holding portion 15, the cross-section of the smoothing portion 14 is a rounded trapezoid, the cross-section of the holding portion 15 is a rounded rectangle, the smoothing portion 14 is fixedly connected to the bending portion 13, and through the smoothing portion 14, the holding portion 15 and the bending portion 13, when the cloth is moving, the smoothing portion 14 guides and smoothes the rolled edge, and the holding portion 15 continues to shape the flattened cloth. This structural constraint greatly improves the smoothing effect of the cloth and avoids problems such as overlapping or folding of the cloth under the action of the pressing plate 23.

[0053] refer to Figure 4 As shown, the shape and function of the two press needles 10 are further distinguished by the fact that the retaining portion 15 of the front press needle 10 is an L-shaped structure. In this embodiment, the main function of the rear press needle 10 is to smooth the curling of the fabric, so the retaining portion 15 of the rear press needle 10 is in a horizontal and straight state, the purpose is to prevent the curling of the fabric from being too large, and the retaining portion 15 can also play a certain guiding role, which makes the functionality of the rear press needle 10 more targeted, but the front press needle 10 not only has the smoothing function, but when the fabric is moving, the L-shaped retaining portion 15 can maximize the avoidance of the problem of curling of the fabric again when it comes into contact with the sewing needle 4, especially for knitted fabrics.

[0054] refer to Figure 5 and Figure 6 As shown, considering the existing fabric anti-curling devices, pneumatic or pressure plate 23 methods are basically used to smooth the fabric, but the smoothing device is large in size and is not convenient for cooperation with the sewing machine. At the same time, the anti-curling device and the sewing machine are basically fixed to each other by bolts or screws, which not only requires drilling holes on the sewing machine, but is also inconvenient to move the anti-curling device later. In order to solve the above problems, cavities 16 are respectively provided on the front and back sides of the shell 5, and suction and pressure grooves 17 connected to the cavity 16 are respectively provided below the two cavities 16. A plurality of branch grooves 18 connected to the suction cup 6 are provided below the suction and pressure grooves 17, and one end of the suction and pressure groove 17 passes through the cavity 16 and is located on the leftmost side of the cavity 16.

[0055] A piston rod 19 that slides left and right is provided in the cavity 16. A fixing plate 20 is fixed to the right side of the two cavities 16. A through hole is provided on the fixing plate 20. The two piston rods 19 pass through one end of the fixing plate 20 and are fixed with the same connecting plate 21. Two front-to-back symmetrical connecting rods 22 are fixed on the connecting plate 21. The two connecting rods 22 pass through one end of the lifting groove 7 and are fixed with the same pressing plate 23. A notch is provided in the middle of the pressing plate 23. A positioning rod 24 that passes through the notch is fixed on the side wall of the lifting groove 7. A plurality of equidistant positioning grooves 25 are provided on the positioning rod 24. A positioning block 26 is rotatably connected to the pressing plate 23. The positioning block 26 is connected to the pressing plate 23 by a torsion spring. Through the piston rod 19, the connecting rod 22, the pressing plate 23, the positioning rod 24 and the positioning block 26 After the worker places the shell 5 on the support frame 2, he first presses the positioning block 26 with one finger to disengage the positioning block 26 from the positioning groove 25, and then presses the pressure plate 23 to move to the right. At this time, during the movement of the piston rod 19 to the right, the gas under the suction cup 6, in the extraction and pressure groove 17 and the branch groove 18 is pumped into the cavity 16 until the pressure plate 23 has an obvious blockage feeling. Finally, the positioning block 26 is clamped with the corresponding positioning groove 25, which further increases the adsorption force between the suction cup 6 and the support frame 2. Compared with the method of using bolts or screws, this method is more efficient and quick. At the same time, considering that the shell 5 can also play a role in adjusting the sewing width of the fabric to a certain extent, the way the suction cup 6 is fixed also facilitates the position adjustment of the shell 5.

[0056] It should be noted that the reason why multiple equidistant positioning grooves 25 are set on the positioning rod 24 is mainly to take into account the initial adsorption state and adsorption force of the suction cup 6 and the support frame 2. When the suction cup 6 is in contact with the support frame 2 only by the gravity of the shell 5 and other components, the pressure plate 23 needs to move a long distance. When the suction cup 6 is in contact with the support frame 2, the worker applies a large downward pressure on the shell 5, and there is a certain adsorption force between the suction cup 6 and the support frame 2. At this time, the moving distance of the pressure plate 23 will be reduced accordingly.

[0057] refer to Figure 7 and Figure 8As shown, considering that the height of the existing pressing plate 23 is not easy to adjust, when the pressing force of the pressing plate 23 on the fabric is too large, the fabric will "twist" during the sewing process, resulting in irregular seams of the underwear, which greatly affects the aesthetics of the underwear. The height adjustment component also includes an oil bag 27 fixed to the bottom of the mounting plate 8, a placement groove 28 is provided at the bottom of the lifting groove 7, and the oil bag 27 is located in the placement groove 28. An equipment cavity 29 is provided on the right side of the shell 5, and an oil storage cylinder 30 is fixedly connected to the equipment cavity 29. A piston plate that moves up and down is provided inside the oil storage cylinder 30, and a threaded rod 31 is coaxially fixed to the top of the piston plate. The threaded rod 31 passes through one end of the shell 5 and is coaxially fixed with a knob 32 An oil outlet pipe is provided at the bottom of the oil storage cylinder 30, and an oil inlet pipe is provided on the side of the oil bag 27 close to the oil storage cylinder 30. The oil outlet pipe and the oil inlet pipe are connected by a hose. Through the oil bag 27, the placement groove 28, the oil storage cylinder 30 and the knob 32, the worker can directly turn the knob 32, and the threaded rod 31 drives the piston plate to move up and down. When the high-pressure needle 10 needs to be adjusted, the threaded rod 31 is rotated to drive the piston plate to move downward. At this time, the hydraulic oil inside the oil storage cylinder 30 is squeezed into the oil bag 27, and the oil bag 27 undergoes flexibly deformation, thereby raising the pressure needle 10, and vice versa. This method can not only adjust the height of the pressure needle 10, but also achieve millimeter-level adjustment by using threads and oil circuits.

[0058] refer to Figure 8 As shown, in order to facilitate workers to observe the adjusted height of the pressure needle 10, two symmetrically distributed scale plates 33 are fixed on the top of the shell 5. Vertical scale bars are provided on the scale plates 33. The threaded rod 31 is rotatably connected to an indicator rod 34 located below the knob 32. The end of the indicator rod 34 away from the threaded rod 31 is located between the two scale plates 33. When the worker adjusts the height of the high-pressure needle 10, every time the indicator plate drops one millimeter, it represents that the height of the pressure needle 10 increases by one millimeter.

[0059] refer to Figure 9 As shown, to further supplement the structure of the suction cup 6, the suction cup 6 includes a supporting portion 35 and an adsorption portion 36. The adsorption portion 36 is in direct contact with the support frame 2. An annular rubber ring 37 is coaxially fixed to one end of the adsorption portion 36 away from the supporting portion 35. The rubber ring 37 is equivalent to thickening the edge of the suction cup 6 to prevent problems such as air leakage in the suction cup 6, which affects the connection strength between the shell 5 and the support frame 2.

[0060] When the present invention is used:

[0061] First, after placing the housing 5 on the support frame 2, the worker presses the positioning block 26 with one finger to disengage the positioning block 26 from the positioning groove 25, and then presses the pressure plate 23 to move to the right. At this time, as the piston rod 19 moves to the right, the gas below the suction cup 6, in the extraction and pressure groove 17, and in the branch groove 18 is extracted into the cavity 16 until the pressure plate 23 feels obviously blocked. Then, the positioning block 26 is engaged with the corresponding positioning groove 25.

[0062] Then, the worker manually adjusts the connecting frame 9 so that the connecting frame 9 and the buckle 11 are disengaged. The connecting frame 9 rotates to the side away from the cloth under the action of the torsion spring. At this time, the cloth can be directly laid flat on the left side of the shell 5, and the connecting frame 9 is then buckled with the buckle 11.

[0063] Secondly, during the process of placing the fabric, the housing 5 can be used as a reference. The edge of the fabric is brought into contact with the housing 5. By adjusting the distance between the housing 5 and the sewing needle 4, the sewing width of the fabric can be adjusted.

[0064] At the same time, to adjust the height of the pressure needle 10, the worker can directly turn the knob 32, and the threaded rod 31 drives the piston plate to move up and down. When the high pressure needle 10 needs to be adjusted, the threaded rod 31 is turned to drive the piston plate to move downward. At this time, the hydraulic oil inside the oil storage cylinder 30 is squeezed into the oil bag 27, and the oil bag 27 undergoes flexible deformation, thereby raising the pressure needle 10, and vice versa.

[0065] Finally, the worker can use the sewing machine to sew the fabric normally, and repeat the above steps to achieve rapid production of underwear. For the same batch of underwear, there is no need to adjust the position of the device and the height of the press needle 10.

[0066] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An anti-curling sewing device for processing underwear fabrics, comprising a sewing machine body (1), the sewing machine body (1) comprising a support frame (2) and a sewing machine head (3) located on the top of the support frame (2), the sewing machine head (3) being provided with a sewing needle (4) that moves up and down, characterized in that: Also includes: A fixing device, the fixing device is fixed to the top of the support frame (2) and is located on the right side of the sewing needle (4), the fixing device is located in the traveling direction of the cloth, the fixing device comprises a shell (5), a plurality of equally spaced suction cups (6) are provided at the bottom of the shell (5), and a lifting groove (7) is provided in the middle of the shell (5); A height adjustment assembly, the height adjustment assembly being located in the housing (5), the height adjustment assembly comprising a mounting plate (8) that moves up and down in the lifting slot (7); An anti-curling device, the anti-curling device being located on a mounting plate (8), the anti-curling device comprising a pressure needle assembly rotatably connected to the mounting plate (8), the pressure needle assembly comprising a connecting frame (9) rotatably connected to the mounting plate (8), and pressure needles (10) being fixedly connected to both ends of the connecting frame (9); The connecting frame (9) includes a fixing portion (12) and a bending portion (13) fixedly connected to the pressure needle (10), the fixing portion (12) matches the buckle (11), the pressure needle (10) includes a smoothing portion (14) and a holding portion (15), the cross section of the smoothing portion (14) is a rounded trapezoid, the cross section of the holding portion (15) is a rounded rectangle, the smoothing portion (14) is fixedly connected to the bending portion (13), the holding portion (15) of the pressure needle (10) on the front side is an L-shaped structure, and the holding portion (15) of the pressure needle (10) on the rear side is in a horizontal straight state; When the pressing needle (10) is at the lowest horizontal position, the pressing needle (10) contacts the support frame (2), the smoothing portion (14) guides and smoothes the rolled edge, and the holding portion (15) continuously shapes the flattened fabric; The suction cup (6) comprises a supporting portion (35) and an adsorption portion (36), wherein the adsorption portion (36) is in direct contact with the support frame (2), and an annular rubber ring (37) is coaxially fixed to one end of the adsorption portion (36) away from the supporting portion (35).

2. The anti-curling sewing equipment for processing underwear fabrics according to claim 1, characterized in that: The anti-curling device further comprises two buckles (11) fixed on the mounting plate (8), the two buckles (11) are symmetrically distributed and matched with the connecting frame (9), and the connecting frame (9) is rotationally connected to the mounting plate (8) via a torsion spring.

3. The anti-curling sewing equipment for processing underwear fabrics according to claim 2, characterized in that: The housing (5) is provided with cavities (16) on the front and rear sides respectively, and pressure extraction grooves (17) communicating with the cavities (16) are provided below the two cavities (16). A plurality of branch grooves (18) communicating with the suction cup (6) are provided below the pressure extraction grooves (17). One end of the pressure extraction groove (17) passes through the cavity (16) and is located at the leftmost side of the cavity (16).

4. The anti-curling sewing equipment for processing underwear fabrics according to claim 3, characterized in that: A piston rod (19) that slides left and right is provided in the cavity (16), and a fixed plate (20) is fixed on the right side of the two cavities (16). A through hole is provided on the fixed plate (20), and the two piston rods (19) pass through the fixed plate (20) and are fixed with a same connecting plate (21) at one end thereof. Two front-to-back symmetrical connecting rods (22) are fixed on the connecting plate (21), and the two connecting rods (22) pass through the lifting groove (7) and are fixed with a same pressing plate (23) at one end thereof. A notch is provided in the middle of the pressing plate (23), and a positioning rod (24) that passes through the notch is fixed on the side wall of the lifting groove (7), and a plurality of equidistantly distributed positioning grooves (25) are provided on the positioning rod (24). A positioning block (26) is rotatably connected to the pressing plate (23), and the positioning block (26) is connected to the pressing plate (23) by a torsion spring.

5. The anti-curling sewing equipment for processing underwear fabrics according to claim 4, characterized in that: The height adjustment assembly further comprises an oil bag (27) fixed to the bottom of the mounting plate (8); a placement groove (28) is provided at the bottom of the lifting groove (7); the oil bag (27) is located in the placement groove (28); an equipment cavity (29) is provided on the right side of the housing (5); an oil storage cylinder (30) is fixedly connected to the equipment cavity (29); a piston plate that moves up and down is provided inside the oil storage cylinder (30); a threaded rod (31) is coaxially fixed to the top of the piston plate; a knob (32) is coaxially fixed to one end of the threaded rod (31) that passes through the housing (5); the threaded rod (31) is threadedly connected to the oil storage cylinder (30); an oil outlet pipe is provided at the bottom of the oil storage cylinder (30); an oil inlet pipe is provided on the side of the oil bag (27) close to the oil storage cylinder (30); the oil outlet pipe is connected to the oil inlet pipe through a hose.

6. The anti-curling sewing equipment for processing underwear fabrics according to claim 5, characterized in that: Two symmetrically distributed scale plates (33) are fixed on the top of the housing (5), and vertical scale bars are provided on the scale plates (33). The threaded rod (31) is rotatably connected to an indicator rod (34) located below the knob (32), and one end of the indicator rod (34) away from the threaded rod (31) is located between the two scale plates (33).

7. A method for processing underwear fabric to prevent curling, characterized in that: The processing method uses the anti-curling sewing device for processing underwear fabrics according to claim 6 to process underwear fabrics, comprising the following steps: Step 1: Place the housing (5) on the support frame (2), press the positioning block (26) with one finger to disengage the positioning block (26) from the positioning groove (25); Step 2: Press the pressure plate (23) to move to the right until the pressure plate (23) feels clearly blocked, and then snap the positioning block (26) into the nearest positioning slot (25); Step 3: Manually disengage the connecting frame (9) from the buckle (11), lay the fabric to be sewn flat on the support frame (2), so that the edge of the fabric can directly contact the housing (5), and then reconnect the connecting frame (9) to the buckle (11); Step 4: Adjust the height of the pressure needle (10) by turning the knob (32) so that the mounting plate (8) rises or falls accordingly. During the rotation process, the position change of the indicator plate on the scale plate (33) can be referred to; Step 5: Use a sewing machine to sew; Step 6: Repeat steps 3 and 5 for the same batch of underwear.

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