Bag opening machine uses the auxiliary device of dark line sewing clamping and folding and bag opening processing system

Abstract

The application provides a hidden line sewing clamping and folding auxiliary device for a bag opening machine and a bag opening processing system, wherein the device comprises a rack, a first placing part for placing a first side of a sewing fabric, a second placing part for placing a second side of the sewing fabric, a pressing assembly for pressing down to form a cutting piece groove for bag opening and sewing of the fabric, a first turnover driving assembly for driving the first placing part to move and turn over to expose a first sewing position for sewing a hidden line, and a second turnover driving assembly for driving the second placing part to move and turn over to expose a second sewing position for sewing a hidden line. The application drives the first placing part to move and turn over by the first turnover driving assembly to fold the fabric for sewing a hidden line on the first side, and then drives the second placing part to move and turn over by the second turnover driving assembly to fold the fabric for sewing a hidden line on the second side, so that manual intervention in the hidden line sewing operation is not needed, the processing efficiency is improved, and the labor cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of sewing equipment technology, and in particular to a concealed thread sewing clamping folding auxiliary device and a bag opening processing system for a bag opening machine. Background Technology

[0002] Pockets are an essential part of most garments, serving as both decoration and storage for personal items. A pocket is formed by sewing the lining, lip, and fabric together onto a fabric piece. The sewing at the pocket opening is generally divided into topstitching and concealed stitching. Topstitching is done on the outside, while concealed stitching is done on the inside. Existing automatic pocket sewing machines typically only allow topstitching; concealed stitching requires manual intervention, such as turning the fabric piece over to expose the inner seam before sewing. This results in low overall efficiency and makes it difficult to meet the demands of mass production. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a concealed stitching clamping and folding auxiliary device and a bag opening processing system for a bag opening machine, which has the advantages of automatically flipping the fabric and improving processing efficiency.

[0004] To achieve the above and other related objectives, the present invention provides the following technical solution: A first aspect of the present invention discloses a concealed stitch sewing clamping and folding auxiliary device for a bag opening machine, comprising: frame; The first placement section is used to place the first side of the sewn fabric; The second placement part is used to place the second side of the sewing fabric. The second placement part is spaced apart from the first placement part and forms a sewing space. The pressing assembly is movable in the transverse and longitudinal directions into the sewing space to press down the fabric to form cut grooves for opening pockets and folding hems; A first flipping drive assembly is configured to drive the first placement portion to move after the pocket folding is completed, so as to fold the cut piece and pocket lining located on the first side toward the second side to expose a first sewing position for sewing the concealed stitch; and The second flipping drive assembly is used to drive the second placement part to move and flip after sewing is completed at the first sewing position, so as to fold the second side of the cut piece and the pocket lining toward the first side to expose the second sewing position for sewing the concealed stitch.

[0005] To achieve the above technical solution, during the bag opening operation, the first side of the fabric is placed on the first placement part and the second side of the fabric is placed on the second placement part to pre-fix the fabric and prevent it from slipping. After the fabric is placed in place, the pressing component moves to the top of the sewing space and then presses down to form a cut piece groove, which serves as the bag opening area. Subsequently, laser bag opening, bag opening hemming, and bag lining placement are performed. Then, the first flipping drive component drives the first placement part to fold the cut piece and bag lining on the first side to the second side, exposing the first seam position for blind stitching on the first side. Then, the second flipping drive component drives the second placement part to fold the cut piece and bag lining on the second side to the first side, exposing the second seam position for blind stitching on the second side. This eliminates the need for manual intervention in the blind stitching operation, improving processing efficiency and reducing labor costs.

[0006] In one embodiment of the present invention, the pressing assembly includes: A sliding mounting base is slidably mounted on the frame, and a first driving member is connected to the frame for driving the sliding mounting base to reciprocate. A pressure base is slidably mounted on the sliding mounting base along the longitudinal direction, and a second driving member is connected to the sliding mounting base for driving the pressure base to reciprocate; The preload frame is fixed to the pressure base; Supported by the pre-compression frame, a first pressing part for pressing the first side of the fabric; and, The second pressing part, which is supported by the pre-press frame, is used to press the second side of the fabric.

[0007] To achieve the above technical solution, the sliding mounting base is driven to slide horizontally and reciprocate, so that the entire pressing assembly can move away from or close to the sewing space. The pressing base is driven to slide longitudinally and reciprocate, so that the entire pressing assembly can press and release the fabric. The first pressing part and the second pressing part press the first side and the second side of the fabric respectively. The first pressing part and the second pressing part cooperate to form the cutting piece groove.

[0008] In one embodiment of the present invention, the first pressing part includes: A first guide rod that is vertically slidably assembled to the preload frame; The front cutting piece presser foot plate, located at the lower end of the first guide rod, is used to elastically press the fabric against the first placement part. The first elastic element used to press the front cut piece presser foot plate; and... A first positioning pressure plate is fixed to the pre-press frame, and the first positioning pressure plate is used to press the fabric into the sewing space.

[0009] In one embodiment of the present invention, the second pressing part includes: A second guide rod that is vertically slidably mounted on the preload frame; The second elastic element sleeved on the second guide rod; A rear cut piece presser foot, disposed at the lower end of the second guide rod, is used to elastically press the fabric against the second placement portion; and... A second positioning pressure plate is fixed to the pre-press frame, and the second positioning pressure plate is used to press the fabric into the sewing space.

[0010] To achieve the above technical solution, the first and second pressing sections descend synchronously to press the fabric. During pressing, the front and rear cutting piece presser feet first press the fabric tightly. Due to the setting of the first and second elastic elements, both the front and rear cutting piece presser feet are in an elastic pressing state. The first and second positioning presser plates continue to press down, pressing the fabric into the sewing space and forming a cutting piece groove between the first and second positioning presser plates, which facilitates the subsequent bag opening operation. Through the elastic pressing of the front and rear cutting piece presser feet and the pressing down of the fabric by the front and rear cutting piece presser feet, the pressing process of the cutting piece groove is more flat and can effectively prevent the fabric from shifting, providing conditions for achieving concealed stitching.

[0011] In one embodiment of the present invention, the frame is provided with front guide rail grooves on both sides of the first placement part. The first placement part includes: a mounting shaft tube movably connected in the front guide rail groove and a front cut piece support plate located below the mounting shaft tube. The mounting shaft tube is provided with a plurality of air blowing holes facing the second placement part. The mounting shaft tube is connected to an external air supply device.

[0012] To achieve the above technical solution, the front cut piece support plate is used to place the first side of the fabric. The mounting shaft tube serves as the mounting base for the front cut piece support plate and, on the other hand, can assist in folding the fabric by blowing air through the air holes.

[0013] In one embodiment of the present invention, the frame is provided with rear guide rail grooves on both sides of the second placement part, and the second placement part includes: a cut piece rear support plate movably connected to the rear guide rail groove, and a cut piece pressure plate hinged to the cut piece rear support plate for clamping the fabric.

[0014] To achieve the above technical solution, after placing the fabric on the back support plate of the cut piece, the cut piece pressure plate is flipped over to clamp the fabric, thereby achieving pre-compression of the fabric and preventing the fabric from slipping.

[0015] In one embodiment of the present invention, a front guide wheel is provided on the mounting shaft tube at the front guide rail groove, and the first flip drive assembly includes: a first flip cylinder fixed to the frame, and a first drive linkage with one end hinged to the piston rod of the first flip cylinder and the other end connected to the mounting shaft tube.

[0016] To achieve the above technical solution, when performing concealed stitching, the piston rod of the first flipping cylinder extends and drives the first drive linkage to move, thereby driving the fabric to move and fold to one side.

[0017] In one embodiment of the present invention, the back support plate of the cut piece is movably connected to the rear guide rail groove via a connecting shaft, and a rear guide wheel is provided on the connecting shaft at the rear guide rail groove. The second flipping drive assembly includes: The second tilting cylinder is fixed to the frame; A second drive rod, with one end hinged to the piston rod of the second tilting cylinder and the other end connected to the connecting shaft; and, A rotary connection assembly for limiting the rotation of the connecting shaft by a predetermined angle.

[0018] In one embodiment of the present invention, the rotating connection assembly includes: A rotating buckle is fixed to the outside of the rear guide rail groove. The rotating buckle is semi-circular and does not interfere with the rear guide rail groove. A rotation limiting block is fixed to the connecting shaft and corresponds to the anti-rotation buckle. The rotation limiting block is fan-shaped and rotates in cooperation with the anti-rotation buckle. After the back support plate of the cut piece rotates by a predetermined angle, the rotation limiting block disengages from the anti-rotation buckle.

[0019] To achieve the above technical solution, when the piston rod of the second flipping cylinder retracts, it drives the second drive linkage to move. Due to the restriction of the locking buckle and the rotation limit block, the rotation limit block will first force the connecting shaft and the second placement part to rotate, thereby causing the fabric to flip from the second side to the first side. After flipping to a predetermined angle, the rotation limit block disengages from the locking buckle. Then, when the piston rod of the second flipping cylinder continues to retract, it will drive the second placement part to move as a whole, so that the second sewing position is exposed more thoroughly.

[0020] In one embodiment of the present invention, a main mounting frame is further included, the frame being slidably connected to the main mounting frame in a vertical direction, and the main mounting frame is further provided with a lifting drive component for driving the frame to move up and down.

[0021] To achieve the above technical solution, the frame is driven by a lifting drive component, which in turn drives other parts to move up and down, facilitating actions such as opening bags and sewing.

[0022] A second aspect of the present invention discloses a bag-opening processing system, comprising: As described in the first aspect, the bag opening machine uses a concealed stitch sewing clamping folding auxiliary device; Laser bag opening equipment for performing bag opening operations; Folding equipment used for folding the opening of bags; A mold tray device for placing pocket accessories; and, A sewing machine head used for sewing operations.

[0023] To achieve the above technical solution, the fabric is pressed, clamped, and folded using a concealed stitching clamping and folding auxiliary device on the bag opening machine. The bag opening action is performed by a laser bag opening device, the bag opening is folded by a folding device, the material is picked up by a mold pallet device, and the concealed stitching action is performed by a sewing machine head. This automates the bag sewing process and improves the sewing efficiency.

[0024] As described above, the concealed stitching clamping folding auxiliary device and bag opening processing system of the present invention for a bag opening machine have the following beneficial effects: This invention provides a concealed stitching clamping and folding auxiliary device for a pocket opening machine, comprising: a frame; a first placement part for placing a first side of the sewing fabric; a second placement part for placing a second side of the sewing fabric, the second placement part being spaced apart from the first placement part and forming a sewing space; a pressing assembly movable in the transverse and longitudinal directions to the sewing space, for pressing down to form a cut piece groove for opening and sewing the fabric; a first flipping drive assembly for driving the first placement part to move and flip after opening and topstitching are completed, so as to fold the cut piece and bag lining on the first side toward the second side to expose a first sewing position for concealed stitching; and a second flipping drive assembly for driving the second placement part to move and flip after sewing at the first sewing position, so as to fold the cut piece and bag lining on the second side toward the first side to expose a second sewing position for concealed stitching. During the bag opening operation, the first side of the fabric is placed on the first placement part and the second side of the fabric is placed on the second placement part to pre-fix the fabric and prevent it from slipping. After the fabric is in place, the pressing component moves to the top of the sewing space and then presses down to form a cut piece groove, which serves as the bag opening area. Subsequently, laser bag opening, bag opening hemming, and bag lining placement are performed. Then, the first flipping drive component drives the first placement part to fold the cut piece and bag lining on the first side to the second side, exposing the first seam position for blind stitching on the first side. Then, the second flipping drive component drives the second placement part to fold the cut piece and bag lining on the second side to the first side, exposing the second seam position for blind stitching on the second side. This eliminates the need for manual intervention in the blind stitching operation, improving processing efficiency and reducing labor costs. Attached Figure Description

[0025] Figure 1 The diagram shows a schematic of the structure of the concealed stitching clamping and folding auxiliary device for the bag opening machine in an embodiment of the present invention.

[0026] Figure 2 The image shown is a side view of the pressing assembly in an embodiment of the present invention.

[0027] Figure 3 The diagram shown is a structural schematic of the pressing assembly in an embodiment of the present invention.

[0028] Figure 4 The diagram shows the position of the pressing component during pressing in an embodiment of the present invention.

[0029] Figure 5 The diagram shows the structure of the first placement part and the first flipping drive assembly in an embodiment of the present invention.

[0030] Figure 6 The diagram shows the structure of the second placement part and the second flipping drive assembly in an embodiment of the present invention.

[0031] Figure 7 Displayed as Figure 6 Enlarged view of part A.

[0032] Component designation explanation 10. Frame; 11. Front guide rail groove; 12. Rear guide rail groove; 13. Main mounting frame; 14. Lifting drive component; 20. First placement part; 21. Mounting shaft tube; 22. Front piece support plate; 23. Air blowing hole; 24. Front guide wheel; 30. Second placement part; 31. Rear piece support plate; 32. Piece pressing plate; 33. Connecting shaft; 34. Rear guide wheel; 40. Pressing assembly; 41. Sliding mounting base; 42. First drive component; 43. Pressing base; 44. Second drive component; 45. Pre-pressing frame; 46. First pressing part; 461. First guide rod; 46 2. First elastic element; 463. Front cut piece presser foot plate; 464. First positioning presser plate; 47. Second pressing part; 471. Second guide rod; 472. Second elastic element; 473. Rear cut piece presser foot plate; 474. Second positioning presser plate; 50. First flip drive assembly; 51. First flip cylinder; 52. First drive linkage; 60. Second flip drive assembly; 61. Second flip cylinder; 62. Second drive linkage; 63. Rotary connection assembly; 631. Rotary locking buckle; 632. Rotary limiting block; 71. Limiting piece; 72. Material support plate; 73. Presser plate. Detailed Implementation

[0033] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. It should be noted that, unless otherwise specified, the following embodiments and features described herein can be combined with each other.

[0034] Please see Figures 1 to 7 The first aspect of this invention provides a concealed stitching clamping and folding auxiliary device for a bag opening machine, comprising: a frame 10; a first placement part 20 for placing a first side of the sewing fabric, the first side being the shorter side; a second placement part 30 for placing a second side of the sewing fabric, the second side being the longer side, the second placement part 30 being spaced apart from the first placement part 20 and forming a sewing space; a pressing assembly 40 movable in the transverse and longitudinal directions to the sewing space for pressing down to form a cut piece groove for opening the bag and folding the edge of the fabric; a first flipping drive assembly 50 for driving the first placement part 20 to move after the bag is opened to fold the cut piece and bag lining on the first side toward the second side to expose a first sewing position for the concealed stitching; and a second flipping drive assembly 60 for driving the second placement part 30 to move and flip after sewing at the first sewing position to fold the cut piece and bag lining on the second side toward the first side to expose a second sewing position for the concealed stitching.

[0035] Specifically, the frame 10 has front guide rail grooves 11 on both sides of the first placement part 20. The first placement part 20 includes: a mounting shaft tube 21 movably connected in the front guide rail groove, and a front piece support plate 22 located below the mounting shaft tube 21. The mounting shaft tube 21 is provided with a front guide wheel 24 at the front guide rail groove 11. The first mounting shaft tube 21 can slide and rotate in the front guide rail groove 11 through the front guide wheel 24. The front piece support plate 22 can be fixed to the mounting shaft tube 21 by welding, screw connection or other means. The mounting shaft tube 21 is provided with a number of air holes 23 facing the second placement part 30. The number of air holes 23 are evenly arranged along the axial direction of the mounting shaft tube 21. The mounting shaft tube 21 is connected to an external air supply device. The external air supply device can usually be connected to one end of the mounting shaft tube 21 through a flexible air supply pipe. The other end of the mounting shaft tube 21 is closed.

[0036] The front fabric support plate 22 is used to place the first side of the fabric. The mounting tube 21 serves as the mounting base for the front fabric support plate 22. On the other hand, when folding the fabric, the air blowing hole 23 can be used to blow air onto the fabric to assist in folding. In practical applications, the fabric is usually covered on the mounting tube 21 and the front fabric support plate 22. This fabric can be, for example, a trouser piece. The fabric on the first side is relatively short, generally about 20cm. When the tube moves, it can push the first side to fold. The pocket lining under the fabric is even shorter, generally about 2cm. Therefore, it needs to rely on air blowing to assist in folding.

[0037] The frame 10 has rear guide rail grooves 12 on both sides of the second placement part 30. The second placement part 30 includes: a cut piece rear support plate 31 movably connected to the rear guide rail groove 12, and a cut piece pressure plate 32 hinged to the cut piece rear support plate 31 for clamping the fabric. The cut piece rear support plate 31 is movably connected to the rear guide rail groove 12 via a connecting shaft 33. A rear guide wheel 34 is provided on the connecting shaft 33 at the rear guide rail groove 12, allowing the connecting shaft 33 to slide and rotate within the rear guide rail groove 12. The cut piece pressure plate 32 and the cut piece rear support plate 31 are hinged together by a hinge, which is located on one side of the cut piece pressure plate 32. The cut piece pressure plate 32 can clamp or release the fabric by flipping the hinge. After the fabric is placed on the cut piece rear support plate 31, the cut piece pressure plate 32 is flipped to clamp the fabric, thereby achieving pre-compression of the fabric and preventing the fabric from slipping.

[0038] The pressing assembly 40 includes: a sliding mounting base 41 slidably mounted on the frame 10 in a transverse direction, with a first driving member 42 connected to the frame 10 for reciprocating movement of the sliding mounting base 41; a pressing base 43 slidably mounted on the sliding mounting base 41 in a longitudinal direction, with a second driving member 44 connected to the sliding mounting base 41 for reciprocating movement of the pressing base 43; a pre-pressing frame 45 fixed to the pressing base 43; a first pressing part 46 supported on the pre-pressing frame 45 for pressing a first side of the fabric; and a second pressing part 47 supported on the pre-pressing frame 45 for pressing a second side of the fabric.

[0039] The first driving component 42 is a cylinder. Specifically, it can be configured such that: a mounting slide rail is provided on the frame 10, the base of the first driving component 42 is fixed on the sliding mounting seat 41, a connecting column is provided at the end of the mounting slide rail, and the piston rod of the first driving component 42 is fixed on the connecting column. When the first driving component 42 extends or retracts, the sliding mounting seat 41 can be moved back and forth laterally. The second driving component 44 is also a cylinder. Specifically, it can be configured such that: the base of the second driving component 44 is fixed on the sliding mounting seat 41, and the piston rod of the second driving component 44 is fixed to the pressing base 43 by bolts. When the second driving component 44 extends or retracts, the pressing base 43 can be moved back and forth longitudinally. The pre-pressing frame 45 is arranged horizontally and is fixed to the bottom of the pressing base 43 by bolts. The first pressing part 46 and the second pressing part 47 are arranged opposite each other and are symmetrical.

[0040] The first driving member 42 drives the sliding mounting base 41 to slide back and forth, so that the pressing assembly 40 can move away from or closer to the sewing space. The second driving member 44 drives the pressing base 43 to slide back and forth, so that the pressing assembly 40 can press and release the fabric. The first pressing part 46 and the second pressing part 47 press the first side and the second side of the fabric respectively. The first pressing part 46 and the second pressing part 47 cooperate to form the cutting piece groove.

[0041] Furthermore, the first pressing part 46 includes: a first guide rod 461 vertically slidably mounted on the pre-pressing frame 45; a front cut piece presser foot 463 disposed at the lower end of the first guide rod 461, the front cut piece presser foot 463 being used to elastically press the fabric against the first placement part 20; a first elastic member 462 for pressing the front cut piece presser foot 463; and a first positioning presser plate 464 fixed to the pre-pressing frame 45, the first positioning presser plate 464 being used to press the fabric into the sewing space; two sets of first guide rods 461 are symmetrically arranged, and the first... A guide rod 461 passes through the pre-compression frame 45. The upper end of the first guide rod 461 is provided with a fixed pressure block. A guide rod is fixed on the upper surface of the pre-compression frame 45, and a fixed head is provided at the upper end of the guide rod. A first elastic member 462 is sleeved on the guide rod. One end of the first elastic member 462 abuts against the fixed head and the other end abuts against the fixed pressure block. The front cut piece presser foot 463 presses the fabric tightly against the rear side of the front cut piece support plate 22. A first support plate can also be provided below the front cut piece support plate 22. The first support plate can be used to support the first positioning pressure plate 464.

[0042] The second pressing part 47 includes: a second guide rod 471 vertically slidably mounted on the pre-pressing frame 45; a second elastic member 472 sleeved on the second guide rod 471; a rear cut piece presser foot 473 disposed at the lower end of the second guide rod 471, the rear cut piece presser foot 473 being used to elastically press the fabric against the second placement part 30; and a second positioning presser plate 474 fixed to the pre-pressing frame 45, the second positioning presser plate 474 being used to press the fabric into the sewing space; the second guide rod 471 is also provided in two sets, the second guide rod 471 passing through the pre-pressing frame 45, and the second guide... The upper end of the rod 471 is also provided with a fixing head. One end of the second elastic member 472 abuts against the lower surface of the pre-press frame 45 and the other end abuts against the rear cutting piece presser foot 473. The rear cutting piece presser foot 473 presses the fabric tightly against the front side of the cutting piece rear support plate 31. A second support plate can also be provided below the cutting piece rear support plate 31. The second support plate can be used to support the second positioning pressure plate 474. Of course, in some embodiments, the second pressing part 47 can adopt the same configuration as the first pressing part 46. Similarly, the first pressing part 46 can also adopt the same configuration as the first pressing part 46.

[0043] The first pressing part 46 and the second pressing part 47 descend synchronously to press the fabric. During pressing, the front cutting piece presser foot 463 and the rear cutting piece presser foot 473 hold the fabric. Due to the setting of the first elastic element 462 and the second elastic element 472, the front cutting piece presser foot 463 and the rear cutting piece presser foot 473 are both in an elastic pressing state, so that the fabric can move under a certain external force. The first positioning presser plate 464 and the second positioning presser plate 474 continue to press down, pressing the fabric into the sewing space, and forming a cutting piece groove between the first positioning plate and the second positioning plate, which facilitates subsequent operations such as opening pockets and blind stitching. Through the elastic pressing of the front cutting piece presser foot 463 and the rear cutting piece presser foot 473 in conjunction with the first positioning presser plate 464 and the second positioning presser plate 474 pressing down the fabric, the pressing process of the cutting piece groove is more flat and can effectively prevent the fabric from shifting, providing conditions for achieving blind stitching.

[0044] The first flipping drive assembly includes: a first flipping cylinder 51 fixed to the frame 10, and a first drive connecting rod 52 with one end hinged to the piston rod of the first flipping cylinder 51 and the other end connected to the mounting shaft tube 21; the piston rod end of the first flipping cylinder 51 is provided with a U-shaped connector, the first end of the first drive connecting rod 52 is hinged to the connector via a rotating shaft, and the second end of the first drive connecting rod 52 is provided with a connecting sleeve, which is sleeved and fixed to the mounting shaft tube 21. When performing concealed stitching, when the piston rod of the first flipping cylinder 51 extends, it drives the first drive connecting rod 52 to move, thereby driving the fabric to move and fold to one side. After folding, the concealed stitching position of the cut piece and the upper part of the pocket lining can be exposed, and after internal stitching, the concealed stitch can be formed.

[0045] The second tilting drive assembly includes: a second tilting cylinder 61 fixed to the frame 10, or a motor; a second drive link 62 with one end hinged to the piston rod of the second tilting cylinder 61 and the other end connected to the connecting shaft 33; and a rotational connection assembly 63 for limiting the rotation of the connecting shaft 33 by a predetermined angle; the connection method between the second drive link 62 and the piston rod of the second tilting cylinder 61 and the second drive link 62 is the same as the connection method of the first drive link 52.

[0046] The rotating connection assembly 63 includes: a locking buckle 631 fixed to the outside of the rear guide rail groove 12, the locking buckle 631 being semi-circular and not interfering with the rear guide rail groove 12; and a rotating limiting block 632 fixed to the connecting shaft 33 and corresponding to the locking buckle 631, the rotating limiting block 632 being fan-shaped and rotatingly engaging with the locking buckle 631, and disengaging from the locking buckle 631 after the rear support plate 31 of the cut piece rotates by a predetermined angle.

[0047] The rotary latch 631 is provided with an oval connecting groove. The rotary latch 631 is connected and fixed to the rear guide rail groove 12 by a bolt passing through the connecting groove. The oval connecting groove allows for fine adjustment of the installation position of the rotary latch 631. The rotary latch 631 is located on the side of the rear guide rail groove 12 away from the first placement part 20, and the end of the rotary latch 631 is located outside the rear guide rail groove 12, so as not to interfere with the sliding of the connecting shaft 33. The rotating limit block 632 has rounded corners on both sides to allow it to disengage from or enter the rotary latch 631.

[0048] When the piston rod of the second flipping cylinder 61 retracts, it drives the second drive linkage 62 to move. Due to the restriction of the locking buckle 631 and the rotation limit block 632, the rotation limit block 632 is first forced to drive the connecting shaft 33 and the second placement part 30 to rotate, thereby causing the fabric to flip from the second side to the first side. After flipping to a predetermined angle, the rotation limit block 632 disengages from the locking buckle 631. Then, when the piston rod of the second flipping cylinder 61 continues to retract, it drives the second placement part 30 to move as a whole, so that the second sewing position is exposed more thoroughly. After the fabric is folded, the hidden stitching position of the cut piece and the lower part of the pocket lining is exposed. After internal sewing, the hidden stitch can be formed. After the sewing is completed, the second flipping cylinder 61 drives the second placement part 30 to reset for the next clamping. In some embodiments, a torsion spring can also be provided at the connection between the second drive linkage 62 and the piston rod of the second flipping cylinder 61 to assist the reset of the second placement part 30.

[0049] Furthermore, the concealed stitching clamping folding auxiliary device for the bag opening machine also includes a main mounting frame 13. The frame 10 is slidably connected to the main mounting frame 13 in the vertical direction. The main mounting frame 13 is also equipped with a lifting drive component 14 for driving the frame 10 to move up and down. The lifting drive component 14 is a cylinder. The bottom of the lifting drive component 14 is fixed to the main mounting frame 13, and the piston rod of the lifting drive component 14 is fixed to the side of the frame 10. The lifting drive component 14 drives the frame 10 to move up and down, which facilitates bag opening, sewing and other operations.

[0050] When performing the bag opening operation, the first side of the fabric is placed on the first placement part 20 and the second side of the fabric is placed on the second placement part 30 to pre-fix the fabric and prevent it from slipping. After the fabric is placed in place, the pressing component 40 moves to the top of the sewing space and then presses down to form a cut piece groove in the fabric, which serves as the bag opening area. Subsequently, laser bag opening, bag opening hemming, and bag lining and lip placement are performed. These steps are carried out using existing sewing mechanisms. For example, bag opening hemming can be achieved using the bag opening shaping device of the fabric bag opening and folding machine disclosed in Chinese Utility Model Patent No. CN219195339U. When placing the bag lining and lip, the entire unit can be moved to the tray mold to pick up the pre-placed bag lining and lip. Specifically, this can be achieved using the mold tray alternating device disclosed in Chinese Utility Model Patent No. CN217298233U. After laser opening and folding, the pressing assembly 40 needs to be driven to rise and move to one side by the first driving component 42 and the second driving component 44 to leave operating space for folding and sewing. After folding, the folded edge of the bag opening is clamped by the limiting plate 71 and the material support plate 72 of the folding equipment and moved to the pallet mold to pick up the bag fabric and bag lip. The limiting plate 71 and the material support plate 72 can be further retracted, and the pressure plate 73 is raised and lowered. When the limiting plate and the material support plate retract, they descend onto the pallet mold to press the folded edge to prevent displacement. While the fabric is being held in place, the first flipping drive assembly 50 drives the mounting shaft tube 21 to fold the cut piece and pocket lining on the first side to the second side, exposing the first seam position for blind stitching on the first side. Then, the second flipping drive assembly 60 drives the second placement part 30 to fold the cut piece and pocket lining on the second side to the first side, exposing the second seam position for blind stitching on the second side. This eliminates the need for manual intervention in the blind stitching operation, improving processing efficiency and reducing labor costs.

[0051] A second aspect of the present invention provides a bag opening processing system, comprising: a concealed thread sewing clamping folding auxiliary device for a bag opening machine as described in the first aspect; a laser bag opening device for performing bag opening operations; a folding device for folding the bag opening; a mold tray device for placing pocket accessories; and a sewing machine head for performing sewing operations.

[0052] The laser bag opening equipment, folding equipment, and mold tray equipment utilize existing equipment, which is used to open the bag opening by laser cutting. The laser bag opening equipment can be moved above the cutting piece groove to perform the bag opening operation. The folding equipment can fold the bag opening and, together with the sewing clamp folding auxiliary device, move to the mold tray equipment to pick up the material. The sewing machine head can use existing CNC sewing machine heads. Of course, in actual use, the sewing machine head needs to be set to be able to slide its sewing part to the cutting piece groove for sewing operations.

[0053] The pocket-opening machine uses a concealed stitching clamping and folding auxiliary device to press, clamp, and fold the fabric. A laser-operated pocket-opening device performs the opening action, and the sewing machine head performs both visible and concealed stitching. This automates the pocket-making process and improves sewing efficiency. In other embodiments, an existing automatic feeding device can be added to integrate feeding, opening, and sewing into a single process. The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. All equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this invention should be covered by the claims of this invention.

Claims

1. A concealed stitching clamping and folding auxiliary device for a bag opening machine, characterized in that, include: frame; The first placement section is used to place the first side of the sewn fabric; The second placement part is used to place the second side of the sewing fabric. The second placement part is spaced apart from the first placement part and forms a sewing space. The pressing assembly is movable in both the horizontal and vertical directions to the sewing space to press down the fabric to form a cut piece groove for opening the bag and folding the hem. The pressing assembly includes a first pressing part and a second pressing part. The first pressing part includes a front cut piece presser foot for pressing the fabric against the first placement part and a first positioning presser plate for pressing the fabric into the sewing space. The second pressing part includes a rear cut piece presser foot for pressing the fabric against the second placement part and a second positioning presser plate for pressing the fabric into the sewing space. After laser opening and folding are completed, the pressing assembly rises and moves to one side to leave operating space for flipping, folding and sewing. A first flipping drive assembly is configured to drive the first placement portion to move after the pocket folding is completed, so as to fold the cut piece and pocket lining located on the first side toward the second side to expose a first sewing position for sewing the concealed stitch; and The second flipping drive assembly is used to drive the second placement part to move and flip after sewing is completed at the first sewing position, so as to fold the second side of the cut piece and the pocket lining toward the first side to expose the second sewing position for sewing the concealed stitch.

2. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 1, characterized in that, The pressing assembly includes: A sliding mounting base is slidably mounted on the frame, and a first driving member is connected to the frame for driving the sliding mounting base to reciprocate. A pressure base is slidably mounted on the sliding mounting base along the longitudinal direction, and a second driving member is connected to the sliding mounting base for driving the pressure base to reciprocate; The preload frame is fixed to the pressure base; The first pressing part is supported by the pre-pressing frame and is used to press the first side of the fabric; The second pressing part is supported by the pre-pressing frame and is used to press the second side of the fabric.

3. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 2, characterized in that, The first pressing section includes: A first guide rod that is vertically slidably assembled to the preload frame; The front cutting piece presser foot plate, located at the lower end of the first guide rod, is used to elastically press the fabric against the first placement part. The first elastic element used to press the front cut piece presser foot plate; and... A first positioning pressure plate is fixed to the pre-press frame, and the first positioning pressure plate is used to press the fabric into the sewing space.

4. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 2 or 3, characterized in that, The second pressing section includes: A second guide rod that is vertically slidably mounted on the preload frame; The second elastic element sleeved on the second guide rod; A rear cut piece presser foot, disposed at the lower end of the second guide rod, is used to elastically press the fabric against the second placement portion; and... A second positioning pressure plate is fixed to the pre-press frame, and the second positioning pressure plate is used to press the fabric into the sewing space.

5. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 1, characterized in that, The frame is provided with front guide rail grooves on both sides of the first placement part. The first placement part includes: a mounting shaft tube movably connected in the front guide rail groove, and a front cut piece support plate located below the mounting shaft tube. The mounting shaft tube is provided with a plurality of air blowing holes facing the second placement part. The mounting shaft tube is connected to an external air supply device.

6. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 1 or 5, characterized in that, The frame is provided with rear guide rail grooves on both sides of the second placement part. The second placement part includes: a cut piece rear support plate movably connected to the rear guide rail groove, and a cut piece pressure plate hinged to the cut piece rear support plate for clamping the fabric.

7. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 5, characterized in that, The mounting shaft tube is provided with a front guide wheel at the front guide rail groove. The first flip drive assembly includes: a first flip cylinder fixed to the frame, and a first drive linkage with one end hinged to the piston rod of the first flip cylinder and the other end connected to the mounting shaft tube.

8. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 6, characterized in that, The back support plate of the cut piece is movably connected to the rear guide rail groove via a connecting shaft. A rear guide wheel is provided on the connecting shaft at the rear guide rail groove. The second flipping drive assembly includes: The second tilting cylinder is fixed to the frame; A second drive rod, with one end hinged to the piston rod of the second tilting cylinder and the other end connected to the connecting shaft; and, A rotary connection assembly for limiting the rotation of the connecting shaft by a predetermined angle.

9. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 8, characterized in that, The rotary connection assembly includes: A rotating buckle is fixed to the outside of the rear guide rail groove. The rotating buckle is semi-circular and does not interfere with the rear guide rail groove. A rotation limiting block is fixed to the connecting shaft and corresponds to the anti-rotation buckle. The rotation limiting block is fan-shaped and rotates in cooperation with the anti-rotation buckle. After the back support plate of the cut piece rotates by a predetermined angle, the rotation limiting block disengages from the anti-rotation buckle.

10. The concealed stitching clamping and folding auxiliary device for a bag opening machine according to claim 1, characterized in that, It also includes a main mounting frame, the frame being slidably connected to the main mounting frame in a vertical direction, and the main mounting frame is also provided with a lifting drive component for driving the frame to move up and down.

11. A bag-opening processing system, characterized in that, include: The concealed stitching clamping folding auxiliary device for a bag opening machine as described in any one of claims 1-10 further includes a laser bag opening device for performing the bag opening operation, a folding device for performing the bag opening folding, a mold tray device for placing bag accessories, and a sewing machine head for performing the sewing operation.

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