Automatic bag turning device for laser bag opening machine

Abstract

An automatic bag turning device for a laser bag opening machine comprises a workbench, a sewing station, a bag opening station and a discharging station are sequentially formed on the workbench, cloth to be processed can be moved back to the discharging station after being cut and folded at the bag opening station, and the cloth and a pocket piece at the discharging station are moved back to the sewing station together for first sewing; by arranging the bag turning mechanism, the bag turning mechanism can turn the pocket piece which is sewn for the first time to form an upper layer and a lower layer, and meanwhile, the pocket piece which forms the two layers can return to a sewing station along with the cloth to be processed; the lower layer of the pocket piece and the to-be-processed cloth are sewed for the second time at the sewing station to form a complete pocket shape, and only one pocket piece needs to be placed, so that the defect that a pocket can be formed only by sequentially placing two pocket pieces in the prior art is overcome, the number of times of placing the pocket pieces is reduced, and the processing efficiency can be improved. In addition, the processing method of forming the double-layer pocket piece through folding can prevent sewing lines from being generated on the bottom edge of the processed pocket, so that the firmness and the attractiveness of the pocket are improved, and the quality requirements of some high-end customers can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of clothing machinery, in particular to an automatic bag turning device for a laser bag opening machine. Background Art

[0002] In the process of clothing processing, the bag opening machine is an indispensable auxiliary processing machine, which is mainly used to form pockets at specific positions of clothing, which is convenient for carrying small items such as mobile phones and wallets. The conventional practice is to process the bag mouth and bag lip separately first, and then sew the bag lip to the bag mouth to complete the bag opening. The processing process of the bag mouth requires cutting, folding, shaping and sewing the bag mouth position of the clothing. Cutting is to open the bag mouth with "Y"-shaped cracks at both ends, folding is to fold the cut bag mouth inward to form a flange, and shaping the bag lip is to place the bag lip on the flange, and finally sew. The processing process of the bag mouth requires cutting, folding, lip positioning and sewing, and folding is to fold the cut bag mouth inward to form a flange. The earliest bag opening machine does not have a full set of processes for fully automatically completing the cutting, folding, lip shaping and sewing processes. In most of the public literature, most of them are completed in a single step, and mechanized processing cannot be fully realized. It also needs to rely on manual work for assistance, resulting in low processing efficiency and high labor costs.

[0003] In response to this situation, some complete machines with a high degree of automation have also appeared on the market. For example, the Chinese utility model patent with application number 202322530537.6 (authorization announcement number CN221117876U) discloses a "Clothing Bag Opening Machine", which includes a frame and a workbench fixed on the frame, the workbench is provided with a sewing station and a feeding station for placing the bag lip, and also includes a pressing mechanism arranged above the workbench, a cutting mechanism for cutting the fixed cloth into the shape of the bag opening, a folding mechanism and a clamping mechanism for folding the cut bag opening cloth. The clamping mechanism is arranged below the pressing mechanism and can clamp and fix the folded bag opening cloth, and can move synchronously with the pressing mechanism to the feeding station and the sewing station. Finally, the bag lip and the bag opening are sewed by the sewing machine. The whole process is completed by mechanical automation, and the production efficiency is relatively high.

[0004] However, there are still some areas for improvement in this type of bag opening machine: due to the process requirements of pocket sewing, two pocket pieces need to be set in sequence, namely the upper pocket opening piece and the lower pocket opening piece. First, the upper pocket opening piece should be sewn on the fabric with the pocket opening already opened, and then the lower pocket opening should be sewn on the fabric with the upper pocket opening piece sewn on it. The upper pocket opening piece and the lower pocket opening piece will form two layers in the process of sequential sewing, and finally the upper pocket opening piece and the lower pocket opening piece will be sewn together to form a complete pocket. Therefore, a seam will be left at the bottom of the sewn pocket. The existence of this seam not only affects the firmness, but also hinders the appearance, and cannot meet the high quality requirements of some high-end customers.

[0005] Therefore, it is an urgent problem for those skilled in the art to provide a bag opening machine that can complete the double-layer sewing of the pocket by placing only one pocket piece, thereby avoiding the formation of a sewing line at the bottom of the pocket. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide an automatic bag turning device for a laser bag opening machine that can complete the double-layer sewing of the pocket by placing only one pocket piece, thereby avoiding the formation of a sewing line at the bottom of the pocket, aiming at the above technical status quo.

[0007] The technical solution adopted by the utility model to solve the above technical problem is as follows: The automatic bag turning device for the laser bag opening machine includes a workbench, on which there are a sewing station, a bag opening station and a feeding station for placing the pocket piece. The cloth to be processed can be moved back to the feeding station after being cut and folded at the bag opening station, and then moved back to the sewing station together with the pocket piece at the feeding station for the first sewing. It also includes a bag turning mechanism, which can turn over the pocket piece that has completed the first sewing and form an upper and lower double layer. The formed double-layer pocket piece can follow the cloth to be processed back to the sewing station, and at the sewing station, the lower layer of the pocket piece and the cloth to be processed are sewn for the second time to form a complete pocket shape.

[0008] In order to optimize the overall structure of the bag turning mechanism and enable the bag turning mechanism to better position and turn over the pocket piece, preferably, the bag turning mechanism includes a material positioning part and a material turning part arranged in front of the material positioning part. The material positioning part is used to position the pocket piece that has completed the first sewing at the sewing station to determine the turning position of the pocket piece, and the material turning part is used to turn down the pocket piece with the determined turning position and make the pocket piece form an upper and lower double layer.

[0009] In order to enable the material positioning part and the material turning part to better move left and right to the feeding station or withdraw from the feeding station, preferably, the bag turning mechanism further includes a mounting seat arranged on the workbench and adjacent to the feeding station. The material positioning part includes a positioning rod extending left and right and capable of moving left and right to the feeding station. The material turning part includes a blowing pipe extending left and right and capable of moving left and right to the feeding station. The height of the blowing pipe is lower than the height of the positioning rod. The blowing pipe is provided with blowing holes communicating with an external air source and capable of blowing air backward. After the pocket piece that has completed the first sewing is moved back to the feeding station, it can be placed on the positioning rod to determine the turning position of the pocket piece. The pocket piece located in front of the positioning rod can be turned down and extended backward under the action of the air flow of the blowing holes to form an upper and lower double layer. The mounting seat is also provided with a first driving part for driving the positioning rod to move left and right and a second driving part for driving the blowing pipe to move left and right.

[0010] In order to enable the material positioning rod to move back and forth, so that the folding position of the pocket piece can be adjusted at any time according to needs to process pockets of different specifications. Preferably, a first mounting frame capable of moving back and forth relative to the mounting seat is provided on the mounting seat, the first driving member is arranged on the first mounting frame, a guide rail extending in the front-back direction is provided on the mounting seat, a first slider adapted to the guide rail is provided on the first mounting frame, and the guiding cooperation between the guide rail and the first slider can make the material positioning rod moving synchronously with the first mounting frame more stable. A third driving member for driving the first mounting frame to move back and forth is provided on the mounting seat. A positioning plate capable of being adjusted back and forth is further provided on the mounting seat. The positioning plate is located on the front side of the first mounting frame. When the first mounting frame moves forward to a set position, it can abut against the rear side portion of the positioning plate to achieve positioning.

[0011] In order to enable the blowing pipe to also move back and forth, so that the blowing pipe can better drive the lower pocket piece to fold backward, and make the pocket piece better form an upper and lower double layer. Preferably, a second mounting frame capable of moving back and forth relative to the mounting seat is provided on the mounting seat, the second driving member is arranged on the second mounting frame, a second slider adapted to the guide rail is also provided on the second mounting frame, and the guiding cooperation between the guide rail and the second slider can make the blowing pipe moving synchronously with the second mounting frame more stable. A fourth driving member for driving the second mounting frame to move back and forth is provided on the mounting seat. When the second mounting frame moves backward to a set position, it can abut against the front side portion of the positioning plate to achieve positioning.

[0012] In order to enable the blowing direction of the blowing holes to be adjustable, so that the material turning can be more accurate. Preferably, a fixing frame is provided at the driving end of the second driving member, the blowing pipe is rotatably arranged on the fixing frame, and the blowing direction of the blowing holes can be changed by adjusting the rotation angle of the blowing pipe.

[0013] In order to better dust-proof the bag turning mechanism and make the bag turning mechanism safer during operation. Preferably, a protective cover is further provided on the mounting seat, and the protective cover covers above the first mounting frame and the second mounting frame, so that the protective cover can form a protection during the movement of the first mounting frame and the second mounting frame.

[0014] In order to prevent the pocket piece to be folded from deviating from the set position. Preferably, a pressing plate assembly and a fixing assembly are further included. The pressing plate assembly can move the cloth to be processed back and forth between the sewing station, the bag opening station and the material placing station. The fixing assembly is used to fix the pocket piece that has completed the first sewing on the pressing plate assembly to prevent the pocket piece that has only completed the first sewing from sagging and affecting the subsequent folding.

[0015] To optimize the overall structure of the fixing component so that it can better fix the pocket piece that has only completed the first sewing, preferably, the fixing component includes a top plate and a top block. The top plate is arranged below the workbench and can move up and down to be exposed at the top of the workbench. The top block is arranged on the pressing plate component and can move back and forth relative to the top plate. The pressing plate component includes a pressing plate. A strip-shaped through hole is formed on the pressing plate for the top plate to pass through from bottom to top. A notch adapted to the top block is formed at the top of the top plate. After the pocket piece is lifted by the top plate and enters the strip-shaped through hole, it can be pressed by the top block against the hole wall of the strip-shaped through hole, so that the pocket piece and the pressing plate can be fixed together with each other.

[0016] To enable the top block to more accurately press the pocket piece against the hole wall of the through hole, preferably, at least two top blocks are provided, and the top blocks are arranged at intervals in the left-right direction. The pressing plate is provided with slots for the top blocks to move back and forth and penetrate through the strip-shaped through hole. The pressing plate is also provided with a fifth driving member for driving the top block to move back and forth. The driving end of the fifth driving member is connected to the top block, so that the top block can press the pocket piece against the hole wall of the strip-shaped through hole along the slot under the drive of the fifth driving member.

[0017] To better drive the top plate to move up and down, preferably, a third mounting frame is provided at the bottom of the workbench. An elevating seat that can move up and down relative to the third mounting frame is provided on the third mounting frame. The top plate is arranged on the elevating seat. The third mounting frame is also provided with a sixth driving member for driving the elevating seat to move up and down. A guiding mechanism is provided between the third mounting frame and the elevating seat to enable the top plate arranged on the elevating seat to move up and down more smoothly.

[0018] Compared with the prior art, the advantages of the present utility model are as follows: By sequentially forming a sewing station, a bag-opening station, and a feeding station on the workbench, the cloth to be processed can be moved back to the feeding station after being cut and folded at the bag-opening station, and then moved back to the sewing station together with the pocket piece at the feeding station for the first sewing. By setting a bag-turning mechanism, the bag-turning mechanism can turn over the pocket piece that has completed the first sewing to form an upper and lower double layer. At the same time, the formed double-layer pocket piece can follow the cloth to be processed back to the sewing station, and at the sewing station, the lower layer of the pocket piece and the cloth to be processed are sewn for the second time to form a complete pocket shape. Since only one pocket piece needs to be placed here, it avoids the drawback in the prior art that two pocket pieces need to be placed in sequence to form a pocket, and reducing the number of times of placing the pocket piece can improve the processing efficiency. In addition, the processing method of turning over to form a double-layer pocket piece can also prevent the generation of sewing lines at the bottom edge of the processed pocket, thereby improving the firmness and aesthetics of the pocket and meeting the quality requirements of some high-end customers. Description of the Drawings

[0019] Figure 1Schematic three-dimensional structure diagram of this embodiment (the material positioning rod and the air blowing pipe have not been moved to the material discharging station);

[0020] Figure 2 Schematic three-dimensional structure diagram of this embodiment (the material positioning rod and the air blowing pipe have been moved to the material discharging station);

[0021] Figure 3 Schematic three-dimensional structure diagram of the bag turning mechanism in this embodiment;

[0022] Figure 4 Schematic structure diagram of another angle of the bag turning mechanism in this embodiment (the material positioning rod and the air blowing pipe are in the outward moving state);

[0023] Figure 5 Schematic structure diagram in this embodiment where the pocket piece is moved to the material discharging station and placed on the material positioning rod (where A indicates the pocket piece);

[0024] Figure 6 Schematic structure diagram in this embodiment where the pocket piece is folded and forms a double layer (where A indicates the pocket piece);

[0025] Figure 7 Schematic top view structure diagram of the fixing component in this embodiment;

[0026] Figure 8 Schematic bottom view structure diagram of the fixing component in this embodiment;

[0027] Figure 9 Exploded structure diagram of the fixing component in this embodiment. Detailed implementation mode

[0028] The present utility model will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0029] As Figures 1 to 9 shown, it is the best embodiment of the present utility model. The automatic bag turning device for a laser bag opening machine in this embodiment mainly includes a workbench 1, a sewing station 2, a bag opening station 3, a material discharging station 8, a bag turning mechanism 4, etc.

[0030] Referring to Figures 1 to 6 shown, the workbench 1 is provided with a sewing station 2, a bag opening station 3, and a material discharging station 8 for placing the pocket piece A. After the cloth to be processed is cut and folded at the bag opening station 3, it can be moved back to the material discharging station 8, and together with the pocket piece A at the material discharging station 8, it is moved back to the sewing station 2 for the first sewing. The bag turning mechanism 4 is arranged on the workbench. The bag turning mechanism 4 can turn over the pocket piece A that has completed the first sewing and form an upper and lower double layer. The formed double-layer pocket piece A can follow the cloth to be processed back to the sewing station 2, and at the sewing station 2, the lower layer of the pocket piece A and the cloth to be processed are sewn for the second time to form a complete pocket shape.

[0031] Among them, in order to optimize the overall structure of the bag turning mechanism 4 so that the bag turning mechanism 4 can better position and fold the pocket piece A, referring to Figure 3 and Figure 4 As shown, in this embodiment, the bag turning mechanism 4 includes a material positioning part 4a and a material turning part 4b arranged on the front side of the material positioning part 4a. The material positioning part 4a is used to position the pocket piece A that has completed the first sewing at the sewing station 2 to determine the folding position of the pocket piece A, and the material turning part 4b is used to turn the pocket piece A with the determined folding position downward and form a double layer of the pocket piece A up and down.

[0032] Secondly, in order to enable the material positioning part 4a and the material turning part 4b to better move left and right to the feeding station 8 or withdraw from the feeding station 8, referring to Figure 4 As shown, the bag turning mechanism 4 in this embodiment further includes a mounting seat 4c arranged on the workbench 1 and adjacent to the feeding station 8. The material positioning part 4a includes a material positioning rod 4a1 extending left and right and capable of moving left and right to the feeding station 8. The material turning part 4b includes a blowing pipe 4b1 extending left and right and capable of moving left and right to the feeding station 8. The height of the blowing pipe 4b1 is lower than that of the material positioning rod 4a1. A blowing hole 4b2 communicating with an external air source and capable of blowing air backward is formed on the blowing pipe 4b1. After the pocket piece A that has completed the first sewing is moved back to the feeding station 8, it can be placed on the material positioning rod 4a1 to determine the folding position of the pocket piece A. The pocket piece A located in front of the material positioning rod 4a1 can be turned downward and extend backward under the action of the airflow of the blowing hole 4b2 to form a double layer up and down. A first driving member 4a2 for driving the left and right movement of the material positioning rod 4a1 and a second driving member 4b3 for driving the left and right movement of the blowing pipe 4b1 are further arranged on the mounting seat 4c.

[0033] Furthermore, in order to enable the material positioning rod 4a1 to move back and forth, so that the folding position of the pocket piece A can be adjusted at any time according to needs to process pockets of different specifications, referring to Figure 4As shown, in this embodiment, a first mounting bracket 4a3 capable of moving back and forth relative to the mounting base 4c is provided on the mounting base 4c. A first driving member 4a2 is provided on the first mounting bracket 4a3. A guide rail 4c1 extending back and forth is provided on the mounting base 4c. A first slider 4a4 adapted to the guide rail 4c1 is provided on the first mounting bracket 4a3. The guiding cooperation between the guide rail 4c1 and the first slider 4a4 can make the material positioning rod 4a1 following the first mounting bracket 4a3 move more smoothly. A third driving member 4a5 for driving the first mounting bracket 4a3 to move back and forth is provided on the mounting base 4c. A positioning plate 4a6 capable of adjusting back and forth is further provided on the mounting base 4c. The positioning plate 4a6 is located on the front side of the first mounting bracket 4a3. When the first mounting bracket 4a3 moves forward to a set position driven by the third driving member 4a5, it can abut against the rear side of the positioning plate 4a6 to achieve positioning. Here, the positioning plate 4a6 can be fixedly mounted on the mounting base 4c by fasteners such as screws and can be adjusted back and forth.

[0034] Meanwhile, in order to enable the blowing pipe 4b1 to also move back and forth, so that the blowing pipe 4b1 can better drive the lower layer of the pocket piece A to fold backward, and make the pocket piece A better form a double layer up and down, refer to Figure 4 As shown, in this embodiment, a second mounting bracket 4b4 capable of moving back and forth relative to the mounting base 4c is provided on the mounting base 4c. A second driving member 4b3 is provided on the second mounting bracket 4b4. A second slider 4b5 adapted to the guide rail 4c1 is also provided on the second mounting bracket 4b4. The guiding cooperation between the guide rail 4c1 and the second slider 4b5 can make the blowing pipe 4b1 following the second mounting bracket 4b4 move more smoothly. A fourth driving member 4b6 for driving the second mounting bracket 4b4 to move back and forth is provided on the mounting base 4c. When the second mounting bracket 4b4 moves backward to a set position, it can abut against the front side of the positioning plate 4a6 to achieve positioning. At this time, the distance between the second mounting bracket 4b4 and the first mounting bracket 4a3 is the front-back width of the positioning plate 4a6, and is also the distance between the material positioning rod 4a1 and the blowing pipe 4b1.

[0035] Here, in order to make the blowing direction of the blowing holes 4b2 adjustable, so that the material turning can be more accurate, refer to Figure 4 As shown, in this embodiment, a fixing bracket 4b7 is further provided at the driving end of the second driving member 4b3. The blowing pipe 4b1 is rotatably provided on the fixing bracket 4b7. We can adjust the rotation angle of the blowing pipe 4b1 to change the blowing direction of the blowing holes 4b2.

[0036] In addition, in order to better dust-proof the bag turning mechanism 4 and make the bag turning mechanism 4 safer during operation, refer to Figure 3As shown, in this embodiment, a protective cover 4d is further provided on the mounting base 4c. The protective cover 4d covers the upper part of the first mounting bracket 4a3 and the second mounting bracket 4b4, so that the protective cover 4d can form a protection during the movement of the first mounting bracket 4a3 and the second mounting bracket 4b4.

[0037] In this embodiment, in order to prevent the pocket piece A to be folded from deviating from the set position, refer to Figure 1 As shown, it further includes a pressing plate assembly 5 and a fixing assembly 6. The pressing plate assembly 5 can move the fabric to be processed back and forth between the sewing station 2, the bag opening station 3 and the feeding station 8. The fixing assembly 6 is used to fix the pocket piece A that has completed the first sewing on the pressing plate assembly 5 to prevent the pocket piece A that has only completed the first sewing from sagging and affecting the subsequent folding.

[0038] In this embodiment, in order to optimize the overall structure of the fixing assembly 6 so that it can better fix the pocket piece A that has only completed the first sewing, refer to Figures 7 to 9 As shown, the fixing assembly 6 includes a top plate 6a and a top block 6b. The top plate 6a is arranged below the workbench 1 and can move up and down and be exposed on the top of the workbench 1. The top block 6b is arranged on the pressing plate assembly 5 and can move back and forth relative to the top plate 6a. The pressing plate assembly 5 includes a pressing plate 5a. A strip-shaped through hole 5a1 is formed on the pressing plate 5a for the top plate 6a to pass through from bottom to top. A notch 6a5 adapted to the top block 6b is formed on the top of the top plate 6a. After the pocket piece A is lifted by the top plate 6a and enters the strip-shaped through hole 5a1, it can be pressed by the top block 6b against the hole wall of the strip-shaped through hole 5a1, so that the pocket piece A and the pressing plate 5a can be fixed together.

[0039] Refer to Figure 9 As shown, in this embodiment, in order to make the top block 6b more accurately press the pocket piece A against the hole wall of the through hole 5a1, at least two top blocks 6b are provided here. The top blocks 6b are arranged at intervals in the left-right direction. The pressing plate 5a is provided with slots 5a2 for the top blocks 6b to move back and forth and penetrate the strip-shaped through hole 5a1. The pressing plate 5a is further provided with a fifth driving member 6b1 for driving the top block 6b to move back and forth. The driving end of the fifth driving member 6b1 is connected to the top block 6b, so that the top block 6b can press the pocket piece A against the hole wall of the strip-shaped through hole 5a1 along the slot 5a2 under the drive of the fifth driving member 6b1.

[0040] Refer to Figure 8 and 9As shown, in this embodiment, in order to better drive the top plate 6a to move up and down, a third mounting bracket 6a1 is specially provided at the bottom of the workbench 1. An elevating seat 6a2 capable of moving up and down relative to the third mounting bracket 6a1 is provided on the third mounting bracket 6a1. The top plate 6a is arranged on the elevating seat 6a2. A sixth driving member 6a3 for driving the elevating seat 6a2 to move up and down is also provided on the third mounting bracket 6a1. A guiding mechanism 6a4 is provided between the third mounting bracket 6a1 and the elevating seat 6a2 to make the top plate 6a arranged on the elevating seat 6a2 move up and down more smoothly.

[0041] It should be additionally noted here that in this embodiment, by sequentially forming a sewing station 2, a bag-opening station 3 and a material-feeding station 8 on the workbench 1, the cloth to be processed can be moved back to the material-feeding station 8 after being cut and folded at the bag-opening station 3, and together with the pocket piece A at the material-feeding station 8, it can be moved back to the sewing station 2 for the first sewing. By setting a bag-turning mechanism 4, the bag-turning mechanism 4 can turn over the pocket piece A that has completed the first sewing and form a double layer (for the specific turning process of the bag-turning mechanism 4, please refer to Figure 5 and Figure 6 as shown). At the same time, the formed double-layer pocket piece A can follow the cloth to be processed back to the sewing station 2, and at the sewing station 2, the lower layer of the pocket piece A and the cloth to be processed are sewn for the second time to form a complete pocket shape. Since only one pocket piece A needs to be placed here, it avoids the drawback in the prior art that two pocket pieces need to be placed in sequence to form a pocket. Reducing the number of times of placing pocket pieces can improve the processing efficiency. In addition, the processing method of turning over to form a double-layer pocket piece can also prevent sewing lines from being generated at the bottom edge of the processed pocket, thereby improving the firmness and aesthetics of the pocket and meeting the quality requirements of some high-end customers.

[0042] It should be noted that in the description of this embodiment, the orientation or positional relationship indicated by terms such as "front, back", "left, right", "up, down", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "installation", "connection", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

Claims

1. An automatic bag turning device for a laser bag opening machine, comprising a workbench (1), wherein a sewing station (2), a bag opening station (3) and a material feeding station (8) for placing pocket pieces (A) are arranged on the workbench (1), and after the cloth to be processed is cut and folded at the bag opening station (3), it can be moved back to the material feeding station (8), and together with the pocket pieces (A) at the material feeding station (8), it is moved back to the sewing station (2) for the first sewing, and it is characterized in that: It further includes a pocket turning mechanism (4). The pocket turning mechanism (4) can fold the pocket piece (A) that has completed the first sewing to form an upper and lower double layer. The pocket piece (A) formed into a double layer can follow the fabric to be processed back to the sewing station (2), and at the sewing station (2), the lower layer of the pocket piece (A) and the fabric to be processed are sewn for the second time to form a complete pocket shape.

2. The automatic bag turning device for a laser bag opening machine according to claim 1, characterized in that: The pocket turning mechanism (4) includes a material positioning part (4a) and a material turning part (4b) arranged on the front side of the material positioning part (4a). The material positioning part (4a) is used to position the pocket piece (A) that has completed the first sewing at the sewing station (2) to determine the folding position of the pocket piece (A). The material turning part (4b) is used to turn down the pocket piece (A) with the determined folding position and make the pocket piece (A) form an upper and lower double layer.

3. The automatic bag turning device for a laser bag opening machine according to claim 2, characterized in that: The pocket turning mechanism (4) further includes a mounting seat (4c) arranged on the workbench (1) and adjacent to the material feeding station (8). The material positioning part (4a) includes a material positioning rod (4a1) extending left and right and capable of moving left and right to the material feeding station (8). The material turning part (4b) includes a blow pipe (4b1) extending left and right and capable of moving left and right to the material feeding station (8). The height of the blow pipe (4b1) is lower than that of the material positioning rod (4a1). The blow pipe (4b1) is provided with air blowing holes (4b2) communicating with an external air source and capable of blowing air backward. After the pocket piece (A) that has completed the first sewing is moved back to the material feeding station (8), it can be placed on the material positioning rod (4a1) to determine the folding position of the pocket piece (A). The pocket piece (A) located on the front side of the material positioning rod (4a1) can be turned down and extend backward under the action of the air flow of the air blowing holes (4b2) to form an upper and lower double layer. The mounting seat (4c) is further provided with a first driving member (4a2) for driving the material positioning rod (4a1) to move left and right and a second driving member (4b3) for driving the blow pipe (4b1) to move left and right.

4. The automatic bag turning device for a laser bag opening machine according to claim 3, characterized in that: The mounting seat (4c) is provided with a first mounting frame (4a3) capable of moving back and forth relative to the mounting seat (4c). The first driving member (4a2) is arranged on the first mounting frame (4a3). The mounting seat (4c) is provided with a guide rail (4c1) extending back and forth. The first mounting frame (4a3) is provided with a first sliding block (4a4) adapted to the guide rail (4c1). The mounting seat (4c) is provided with a third driving member (4a5) for driving the first mounting frame (4a3) to move back and forth. The mounting seat (4c) is further provided with a positioning plate (4a6) capable of being adjusted back and forth. The positioning plate (4a6) is located on the front side of the first mounting frame (4a3). When the first mounting frame (4a3) moves forward to a set position, it can abut against the rear side part of the positioning plate (4a6) to achieve positioning.

5. The automatic bag turning device for a laser bag opening machine according to claim 4, characterized in that: A second mounting bracket (4b4) capable of moving back and forth relative to the mounting base (4c) is provided on the mounting base (4c). The second driving member (4b3) is provided on the second mounting bracket (4b4). A second slider (4b5) adapted to the guide rail (4c1) is also provided on the second mounting bracket (4b4). A fourth driving member (4b6) for driving the second mounting bracket (4b4) to move back and forth is provided on the mounting base (4c). When the second mounting bracket (4b4) moves backward to a set position, it can abut against the front side of the positioning plate (4a6) to achieve positioning.

6. The automatic bag turning device for a laser bag opening machine according to claim 5, characterized in that: A fixing bracket (4b7) is provided at the driving end of the second driving member (4b3). The blowing pipe (4b1) is rotatably provided on the fixing bracket (4b7). By adjusting the rotation angle of the blowing pipe (4b1), the blowing direction of the blowing hole (4b2) can be changed.

7. The automatic bag turning device for a laser bag opening machine according to any one of claims 1 to 6, characterized in that: It further includes a pressing plate assembly (5) and a fixing assembly (6). The pressing plate assembly (5) can move the cloth to be processed back and forth between the sewing station (2), the bag opening station (3) and the feeding station (8). The fixing assembly (6) is used to fix the pocket piece (A) that has completed the first sewing on the pressing plate assembly (5) to prevent the pocket piece (A) that has only completed the first sewing from sagging and affecting the subsequent folding.

8. The automatic bag turning device for a laser bag opening machine according to claim 7, characterized in that: The fixing assembly (6) includes a top plate (6a) and a top block (6b). The top plate (6a) is provided below the workbench (1) and can move up and down and be exposed at the top of the workbench (1). The top block (6b) is provided on the pressing plate assembly (5) and can move back and forth relative to the top plate (6a). The pressing plate assembly (5) includes a pressing plate (5a). A strip-shaped through hole (5a1) for the top plate (6a) to pass through from bottom to top is formed on the pressing plate (5a). A notch (6a5) adapted to the top block (6b) is formed at the top of the top plate (6a). After the pocket piece (A) is lifted by the top plate (6a) and enters the strip-shaped through hole (5a1), it can be pressed by the top block (6b) against the hole wall of the strip-shaped through hole (5a1), so that the pocket piece (A) and the pressing plate (5a) can be fixed together.

9. The automatic bag turning device for a laser bag opening machine according to claim 8, wherein: At least two top blocks (6b) are provided, and the top blocks (6b) are arranged at intervals in the left-right direction. Slots (5a2) for the top blocks (6b) to move back and forth and penetrate the strip-shaped through hole (5a1) are formed on the pressing plate (5a). A fifth driving member (6b1) for driving the top block (6b) to move back and forth is further provided on the pressing plate (5a). The driving end of the fifth driving member (6b1) is connected to the top block (6b) so that the top block (6b) can press the pocket piece (A) against the hole wall of the strip-shaped through hole (5a1) along the slot (5a2) under the drive of the fifth driving member (6b1).

10. The automatic bag turning device for a laser bag opening machine according to claim 8, characterized in that: A third mounting bracket (6a1) is provided at the bottom of the workbench (1). An elevating seat (6a2) capable of moving up and down relative to the third mounting bracket (6a1) is provided on the third mounting bracket (6a1). The top plate (6a) is arranged on the elevating seat (6a2). A sixth driving member (6a3) for driving the elevating seat (6a2) to move up and down is further provided on the third mounting bracket (6a1). A guiding mechanism (6a4) capable of making the top plate (6a) arranged on the elevating seat (6a2) move up and down more smoothly is provided between the third mounting bracket (6a1) and the elevating seat (6a2).

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