Cutting and sewing device for binding pocket leather decoration piece

Abstract

The utility model discloses a cutting and sewing device for a pocket leather decorative sheet, which comprises a rack, a cutting mechanism, a cutting mechanism, a sewing mechanism, a cutting mechanism, a cutting mechanism, a sewing mechanism and a cutting mechanism, the rack is provided with a support plate and an automatic sewing machine, and the cutting mechanism comprises a bearing plate and a movably arranged cutting mechanism; the decorative sheet transfer mechanism comprises a suction cup and a transverse moving unit; a material roll in the material roll unwinding mechanism is connected to the bearing plate; the cutting mechanism of the cutting mechanism keeps moving, the material roll is cut, and the decoration pieces are transferred to the cloth bag through the decoration piece transferring mechanism. According to the tailoring and sewing device for the girdle pocket leather decoration piece, a material roll can be automatically cut into the decoration piece in a preset shape, then the decoration piece and a pocket body are automatically positioned and sewn, automatic cutting and positioning sewing of the decoration piece can be achieved, manual operation is omitted, the sewing efficiency of the girdle pocket decoration piece can be greatly improved, and the sewing efficiency of the girdle pocket leather decoration piece is improved. Therefore, the overall production efficiency of the binding bag can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drawstring bag production equipment, and in particular to a cutting and sewing device for drawstring bag leather decorative pieces. Background Art

[0002] Drawstring bags are widely used, mostly as storage bags. By sewing a drawstring that can move at the bag opening, users can tighten the bag opening of the drawstring bag through the drawstring, which is convenient for storage. During the production process of drawstring bags, in order to make the drawstring bags more beautiful, decorative pieces need to be sewn on the bag body of the drawstring bag.

[0003] According to the utility model patent application with the patent number: CN221460792U and the publication date of August 2, 2024, a decorative fabric cutting device is disclosed, including a conveying roller. One side of the conveying roller is provided with a support frame, the support frame includes a plurality of conveying rollers, the top of the support frame is provided with a flattening component, the flattening component is provided with a plurality of flattening rollers, one side of the flattening component is provided with a limiting component, and the limiting component includes a first motor and a limiting plate. In this utility model, through the provision of the flattening component and the limiting component, the decorative fabric enters the conveying rollers on the support frame by the conveying roller for conveying. When it is conveyed into the area of the flattening component, a plurality of driving motors work to drive the flattening rollers to rotate, and the decorative fabric is leveled from the top. Subsequently, the decorative fabric enters the area of the limiting component. After the length displacement sensor in the guiding plate detects that the conveying length of the decorative fabric reaches the specified length, the first motor works to drive the limiting plate to move downward to clamp and limit the device fabric, preventing it from continuing to be conveyed, ensuring that precise cutting work can be carried out, and ensuring smooth progress during the cutting process.

[0004] After the drawstring bag is sewn, decorative pieces need to be sewn on the drawstring bag. In the prior art, some decorative pieces are made by stamping and cutting, and then the decorative pieces are positioned with the bag body through manual positioning, and then the decorative pieces are fixed to the bag body by manually using a sewing machine. When using stamping and cutting to make decorative pieces, there is a lot of waste, and the speed of manually positioning the decorative pieces with the bag body is slow and the efficiency is low. Therefore, a cutting and sewing device for drawstring bag leather decorative pieces is proposed, aiming to solve the problems of a large amount of waste when using stamping and cutting to make decorative pieces and slow speed and low efficiency of manually positioning the decorative pieces with the bag body during the production process of drawstring bags in the prior art. Content of the Utility Model

[0005] The purpose of the utility model is to provide a cutting and sewing device for drawstring bag leather decorative pieces, aiming to solve the problems of a large amount of waste when using stamping and cutting to make decorative pieces and slow speed and low efficiency of manually positioning the decorative pieces with the bag body during the production process of drawstring bags in the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A trimming and sewing device for the decorative piece of drawstring bag leather, including a frame, on which a support plate and an automatic sewing machine are arranged, and further including:

[0008] A trimming mechanism, which includes a supporting plate and a cutting mechanism arranged movably;

[0009] A decorative piece transfer mechanism, which includes a suction cup and a transverse movement unit;

[0010] A material roll unwinding mechanism, in which the material roll inside is connected to the supporting plate;

[0011] By keeping the cutting mechanism of the trimming mechanism in motion, the material roll is cut, and the decorative piece is transferred to the cloth bag through the decorative piece transfer mechanism.

[0012] Preferably, it further includes a cloth bag movement mechanism, which is arranged on the frame. The cloth bag movement mechanism includes a fixed frame fixedly connected to the frame, a longitudinal driving mechanism, and a cloth bag fixing plate. The longitudinal driving mechanism is connected to the fixed frame, the output end of the longitudinal driving mechanism is fixedly connected with a mounting plate, a lifting cylinder is connected to the mounting plate, and the longitudinal driving mechanism is connected to the output end of the lifting cylinder.

[0013] Preferably, the number of the cutting mechanisms is two, and the two cutting mechanisms are arranged in a staggered manner at a certain angle. The cutting mechanism includes a movable cylinder, a sliding seat, and a cutting motor. The sliding seat is slidably connected to the frame, and the cutting motor is fixedly installed on the sliding seat.

[0014] Preferably, the decorative piece transfer mechanism further includes a mounting frame, a sliding frame, a longitudinal driving cylinder, a movable block, a lifting driving cylinder, a connecting plate, and a rotating cylinder. The mounting frame is fixedly installed on the outer wall of one side of the frame, the transverse movement unit is fixedly installed on the outer wall of one side of the mounting frame, the sliding frame is slidably connected to the mounting frame, the sliding frame is connected to the output end of the transverse movement unit, the longitudinal driving cylinder is fixedly installed on the sliding frame, the movable block is slidably connected to the sliding frame, the output end of the longitudinal driving cylinder is fixedly connected to the movable block, the lifting driving cylinder is fixedly connected to the movable block, the connecting plate is fixedly connected to the output end of the lifting driving cylinder, the rotating cylinder is fixedly installed on the outer wall of one side of the connecting plate, the number of the suction cups is two, one of the suction cups is fixedly connected to the outer wall of one side of the connecting plate, and the other suction cup is connected to the output end of the rotating cylinder.

[0015] Preferably, the material roll unwinding mechanism includes a material roll frame and a material roll driving mechanism. The material roll frame and the material roll driving mechanism are both connected to the frame, and the material roll inside the material roll frame is connected to the supporting plate through the material roll driving mechanism.

[0016] Preferably, the coil driving mechanism includes a first fixing plate, a second fixing plate, a driving motor, a driving shaft and a driven shaft. The first fixing plate and the second fixing plate are both fixedly connected to the frame. The driving shaft is rotatably connected between the first fixing plate and the second fixing plate, and one end of the driving shaft penetrates and extends to the outer wall on one side of the first fixing plate. The driving motor is fixedly installed on the frame, and the output end of the driving motor is in transmission connection with the driving shaft. The number of driven shafts is two. One driven shaft is rotatably connected between the first fixing plate and the second fixing plate, and the other driven shaft is rotatably connected to the outer wall on one side of the first fixing plate.

[0017] Preferably, it further includes a decorative sheet fixing mechanism. The decorative sheet fixing mechanism includes a polygonal block, a telescopic driving cylinder and a guiding plate. The telescopic driving cylinder is fixedly installed on the outer wall on one side of the frame. The polygonal block is internally provided with a first channel and a second channel. The guiding plate is fixedly installed on the frame.

[0018] In the above technical solution, a trimming and sewing device for the decorative sheet of the drawstring bag leather provided by the present utility model has the following beneficial effects:

[0019] In this utility model, the coil in the coil unwinding mechanism is cut and formed on the supporting plate by the cutting mechanism, and the cut and formed decorative sheet is placed on the bag body by the decorative sheet transfer mechanism. Finally, the decorative sheet and the bag body are sewn and fixed by the automatic sewing machine. It can automatically cut the coil into decorative sheets of a predetermined shape, and then automatically position and sew the decorative sheet and the bag body. It can realize the automatic cutting and positioning sewing of the decorative sheet, eliminating manual operation, greatly improving the sewing efficiency of the drawstring bag decorative sheet, and thus improving the overall production efficiency of the drawstring bag. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a three-dimensional structural schematic diagram provided by an embodiment of the present utility model;

[0022] Figure 2 It is a structural schematic diagram of the cloth bag transfer mechanism provided by an embodiment of the present utility model;

[0023] Figure 3 It is a partial structural schematic diagram of the cutting mechanism provided by an embodiment of the present utility model;

[0024] Figure 4Schematic diagram of the structure of the unwinding mechanism part provided by the embodiment of the present utility model;

[0025] Figure 5 Schematic diagram of the structure of the decorative sheet transfer mechanism provided by the embodiment of the present utility model.

[0026] Explanation of reference numerals:

[0027] 1. Frame; 11. Support plate; 2. Automatic sewing machine; 3. Cutting mechanism; 31. Support plate; 32. Cutting mechanism; 321. Moving cylinder; 322. Sliding seat; 323. Cutting motor; 4. Decorative sheet transfer mechanism; 41. Suction cup; 42. Transverse movement unit; 43. Mounting frame; 44. Sliding frame; 45. Longitudinal driving cylinder; 46. Moving block; 47. Lifting driving cylinder; 48. Connecting plate; 49. Rotary cylinder; 5. Unwinding mechanism for material roll; 51. Material roll rack; 52. Material roll driving mechanism; 521. First fixing plate; 522. Second fixing plate; 523. Driving motor; 524. Driving shaft; 525. Driven shaft; 6. Cloth bag moving mechanism; 61. Fixed frame; 62. Longitudinal driving mechanism; 63. Cloth bag fixing plate; 631. Connecting piece; 632. Fixed strip; 633. Arc-shaped piece; 64. Mounting plate; 65. Lifting cylinder; 7. Decorative sheet fixing mechanism; 71. Polygonal block; 72. Telescopic driving cylinder; 73. Guide plate. Detailed implementation manners

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] Please refer to Figure 1 —5, a trimming and sewing device for the leather decorative sheet of a drawstring bag, including a frame 1, on which a support plate 11 and an automatic sewing machine 2 are arranged, and further including:

[0030] A cutting mechanism 3, which includes a support plate 31 and a cutting mechanism 32 movably arranged;

[0031] A decorative sheet transfer mechanism 4, which includes a suction cup 41 and a transverse movement unit 42;

[0032] An unwinding mechanism 5 for a material roll, in which the material roll is connected to the support plate 31;

[0033] By keeping the cutting mechanism 32 of the cutting mechanism 3 moving, the material roll is cut, and the decorative sheet is transferred to the cloth bag through the decorative sheet transfer mechanism 4.

[0034] Specifically, as Figure 1As shown in the figure, a support plate 11 is fixedly connected to the frame 1 through a support member. The automatic sewing machine 2 is fixedly arranged on the frame 1, and the working plane of the automatic sewing machine 2 is aligned with the support plate 11, facilitating the movement of the cloth bag to the automatic sewing machine 2 for sewing;

[0035] The cutting mechanism 3 is arranged on the first frame 1. Specifically, the cutting mechanism 3 includes a supporting plate 31 and a movable cutting mechanism 32. Further, as Figure 3 , Figure 4 and Figure 5 shown, the number of the cutting mechanisms 32 is two, and the two cutting mechanisms 32 are arranged in a staggered manner at a certain angle, capable of cutting the tape at different angles. Preferably, the angle between the two cutting mechanisms 32 is 45°, and the tape can be cut into two isosceles triangles. Specifically, the cutting mechanism 32 includes a movable cylinder 321, a sliding seat 322 and a cutting motor 323. As Figure 3 shown, the sliding seat 322 is slidably connected to the frame 1, the cutting motor 323 is fixedly installed on the sliding seat 322, and a cutting blade is fixedly installed at the output end of the cutting motor 323. The cutting blade is driven to rotate by the cutting motor 323, and the sliding seat 322 is driven to slide by the movable cylinder 321 to cut the tape.

[0036] Further, the decorative piece transfer mechanism 4 includes a suction cup 41 and a transverse movement unit 42. The suction cup 41 is connected to the transverse movement unit 42, and the transverse movement unit 42 drives the suction cup 41 to move transversely, moving the cut decorative piece from the supporting plate 31 to the support plate 11;

[0037] As a further embodiment provided by the present application, the decorative piece transfer mechanism 4 further includes a mounting frame 43, a sliding frame 44, a longitudinal driving cylinder 45, a movable block 46, a lifting driving cylinder 47, a connecting plate 48 and a rotary cylinder 49. As Figure 5As shown in the figure, the mounting bracket 43 is fixedly installed on the outer wall of one side of the frame 1, the transverse movement unit 42 is fixedly installed on the outer wall of one side of the mounting bracket 43, the sliding bracket 44 is slidably connected to the mounting bracket 43 through a slide rail, the output end of the transverse movement unit 42 is connected to the sliding bracket 44, and the output end of the transverse movement unit 42 can drive the sliding bracket 44 to reciprocate. The transverse movement unit 42 can be mechanical components such as a cylinder or a linear drive module. The longitudinal drive cylinder 45 is fixedly installed on the outer wall of one side of the sliding bracket 44, the movable block 46 is slidably connected to the sliding bracket 44 through a slide rail, the output end of the longitudinal drive cylinder 45 is fixedly connected to the movable block 46, and the longitudinal drive cylinder 45 can drive the movable block 46 to slide on the sliding bracket 44. The lifting drive cylinder 47 is fixedly connected to the movable block 46, the connecting plate 48 is fixedly connected to the output end of the lifting drive cylinder 47, the rotary cylinder 49 is fixedly installed on the outer wall of one side of the connecting plate 48, the number of the suction cups 41 is two, one of the suction cups 41 is fixedly connected to the outer wall of one side of the connecting plate 48, and the other suction cup 41 is connected to the output end of the rotary cylinder 49. The lifting drive cylinder 47 can drive the connecting plate 48 to lift, and further can drive the suction cup 41 to adsorb the decorative sheet. One of the suction cups 41 is connected to the output end of the rotary cylinder 49, and the direction of the decorative sheet can be changed through the rotary cylinder 49 to accurately position the decorative sheet;

[0038] Further, as shown in Figure 3 and Figure 2 the figure, the material roll unwinding mechanism 5 includes a material roll rack 51 and a material roll driving mechanism 52. The material roll rack 51 and the material roll driving mechanism 52 are both connected to the frame 1, and the material roll in the material roll rack 51 is connected to the supporting plate 31 through the material roll driving mechanism 52;

[0039] The material roll driving mechanism 52 includes a first fixing plate 521, a second fixing plate 522, a driving motor 523, a driving shaft 524 and a driven shaft 525. Specifically, the first fixing plate 521 and the second fixing plate 522 are both fixedly connected to the frame 1, and the distance between the first fixing plate 521 and the second fixing plate 522 is adapted to the width of the material roll to facilitate positioning of the material tape. The driving shaft 524 is rotatably connected between the first fixing plate 521 and the second fixing plate 522, and one end of the driving shaft 524 penetrates and extends to the outer wall of one side of the first fixing plate 521. The driving motor 523 is fixedly installed on the frame 1, and the output end of the driving motor 523 is in transmission connection with the driving shaft 524 through a transmission belt, so that the driving motor 523 can drive the driving shaft 524 to rotate to convey the material tape. The number of the driven shafts 525 is two, one of the driven shafts 525 is rotatably connected between the first fixing plate 521 and the second fixing plate 522, and the other driven shaft 525 is rotatably connected to the outer wall of one side of the first fixing plate 521. The driven shaft 525 can assist in conveying the material tape.

[0040] As a further embodiment provided by the present utility model, as Figure 4 and Figure 5 shown, the decorative sheet fixing mechanism 7 includes a polygonal block 71, a telescopic driving cylinder 72 and a guiding plate 73. The guiding plate 73 is fixedly installed on the frame 1 through a support member, and the guiding plate 73 is installed on one side of the supporting plate 31. During cutting, it can support the cut decorative sheet and at the same time guide the cutting blade of one of the cutting mechanisms 32. The telescopic driving cylinder 72 is fixedly installed on the outer wall of one side of the frame 1. The polygonal block 71 is internally provided with a first channel and a second channel, and the first channel and the second channel can respectively guide the cutting blades of the two cutting mechanisms 32.

[0041] In this utility model, the cutting mechanism 3 cuts the material roll in the material roll unwinding mechanism 5 into a formed shape on the supporting plate 31, and the formed decorative sheet is placed on the bag body through the decorative sheet transfer mechanism 4. Finally, the decorative sheet and the bag body are sewn and fixed by the automatic sewing machine 2. It can automatically cut the material roll into decorative sheets of a predetermined shape, and then automatically position and sew the decorative sheet and the bag body, which can realize the automatic cutting and positioning sewing of the decorative sheet, eliminating manual operation, greatly improving the sewing efficiency of the drawstring bag decorative sheet, and thus improving the overall production efficiency of the drawstring bag. By keeping the two cutting mechanisms 4 moving in sequence, the material tape can be cut into two triangular decorative sheets, which can reduce waste generation and lower production costs.

[0042] It further includes a cloth bag moving mechanism 6, as Figure 2 shown. The cloth bag moving mechanism 6 includes a fixed frame 61 fixedly connected to the frame 1, a longitudinal driving mechanism 62 and a cloth bag fixing plate 63. The longitudinal driving mechanism 62 is connected to the fixed frame 61. The output end of the longitudinal driving mechanism 62 is fixedly connected with a mounting plate 64. An elevating cylinder 65 is connected to the mounting plate 64. The cloth bag fixing plate 63 is connected to the output end of the elevating cylinder 65. It should be noted that the longitudinal driving mechanism 62 can be a conventional mechanical component such as a linear driving module or a cylinder. The cloth bag fixing plate 63 includes a connecting piece 631, a fixing strip 632 and an arc-shaped piece 633. The number of the fixing strips 632 is several. The several fixing strips 632 are all fixedly connected to the connecting piece 631, and the several fixing strips 632 are symmetrically distributed on the connecting piece 631. The arc-shaped piece 633 is fixedly connected to the fixing strip 632. By the elevating cylinder 65, the cloth bag fixing plate 63 can be driven to move up and down, so as to press the cloth bag tightly on the supporting plate 11. By the longitudinal driving mechanism 62, the cloth bag can be moved on the supporting plate 11. The longitudinal driving mechanism 62 can be a mechanical component such as a cylinder or a linear driver.

[0043] Working principle:

[0044] Manually place the cloth bag on the supporting plate 11;

[0045] The drive motor 523 of the material roll unwinding mechanism 5 drives the drive shaft 524 to rotate, thereby driving the unwinding of the material tape and moving the end of the material tape onto the guide plate 73;

[0046] Subsequently, the telescopic drive cylinder 72 of the decorative sheet fixing mechanism 7 descends, causing the polygonal block 71 to abut against the supporting plate 31 and the guide plate 73 to fix the material tape;

[0047] Finally, the movable cylinders 321 of the two cutting mechanisms 32 keep moving in sequence, driving the two cutting motors 323 to keep moving successively to cut the material tape, forming two triangular structures at one end of the material tape. Subsequently, the telescopic drive cylinder 72 first drives the polygonal block 71 to rise and then drives the polygonal block 71 to rotate to prevent interference;

[0048] Subsequently, the lifting drive cylinder 47 drives the connecting plate 48 to descend, adsorb one decorative sheet with one of the suction cups 41, then the lifting drive cylinder 47 resets, and the longitudinal drive cylinder 45 drives the movable block 46 to move, aligning the other suction cup 41 with the other triangular decorative sheet. Subsequently, the lifting drive cylinder 47 drives the connecting plate 48 to descend, and adsorbs the remaining decorative sheet with the other suction cup 41;

[0049] Subsequently, the transverse movement unit 42 drives the entire sliding frame 44 to move transversely, moving the decorative sheet above the cloth bag. Subsequently, the rotary cylinder 49 drives one of the suction cups 41 to rotate to adjust the position of the decorative sheet. Subsequently, the lifting drive cylinder 47 drives the connecting plate 48 to descend, and places the two decorative sheets on the bag body;

[0050] The longitudinal drive mechanism 62 is moved above the cloth bag through the cloth bag moving mechanism 6. Subsequently, the longitudinal drive mechanism 63 is driven by the lifting cylinder 65 to press the cloth bag tightly on the support plate 11, and then the longitudinal drive mechanism 62 drives the cloth bag to move on the support plate 11 to the automatic sewing machine 2, and the automatic sewing machine 2 stitches and fixes one end of the decorative sheet and the cloth bag.

[0051] Those skilled in the art can understand that other similar connection methods can also implement the present utility model. For example, methods such as welding, bonding, or screwing.

[0052] Only some exemplary embodiments of the present utility model have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A device for cutting and sewing leather decorative pieces of a drawstring bag, comprising a frame (1), on which a support plate (11) and an automatic sewing machine (2) are arranged, characterized in that: Also includes: A cutting mechanism (3), the cutting mechanism (3) comprising a supporting plate (31) and a movably arranged cutting mechanism (32); A decorative sheet transfer mechanism (4), the decorative sheet transfer mechanism (4) comprising a suction cup (41) and a lateral movement unit (42); A material roll unwinding mechanism (5), wherein the material roll in the material roll unwinding mechanism (5) is connected to a supporting plate (31); The cutting mechanism (32) of the cutting mechanism (3) is kept in motion to cut the material roll, and the decorative sheet is transferred to the cloth bag through the decorative sheet transfer mechanism (4).

2. A device for cutting and sewing leather decorative pieces of a drawstring bag according to claim 1, characterized in that: The cloth bag moving mechanism (6) is also included. The cloth bag moving mechanism (6) is arranged on the frame (1). The cloth bag moving mechanism (6) includes a fixing frame (61) fixedly connected to the frame (1), a longitudinal driving mechanism (62) and a cloth bag fixing plate (63). The longitudinal driving mechanism (62) is connected to the fixing frame (61). The output end of the longitudinal driving mechanism (62) is fixedly connected to a mounting plate (64). The mounting plate (64) is connected to a lifting cylinder (65). The cloth bag fixing plate (63) is connected to the output end of the lifting cylinder (65).

3. A device for cutting and sewing leather decorative pieces of a drawstring bag according to claim 1, characterized in that: The number of the cutting mechanisms (32) is two, and the two cutting mechanisms (32) are staggered at a certain angle. The cutting mechanism (32) comprises a movable cylinder (321), a sliding seat (322) and a cutting motor (323). The sliding seat (322) is slidably connected to the frame (1), and the cutting motor (323) is fixedly mounted on the sliding seat (322).

4. A device for cutting and sewing leather decorative pieces of a drawstring bag according to claim 1, characterized in that: The decorative sheet transfer mechanism (4) further comprises a mounting frame (43), a sliding frame (44), a longitudinal drive cylinder (45), a movable block (46), a lifting drive cylinder (47), a connecting plate (48) and a rotating cylinder (49), wherein the mounting frame (43) is fixedly mounted on an outer wall of one side of the frame (1), the transverse movement unit (42) is fixedly mounted on an outer wall of one side of the mounting frame (43), the sliding frame (44) is slidably connected to the mounting frame (43), the sliding frame (44) is connected to an output end of the transverse movement unit (42), and the longitudinal drive cylinder (45) is fixedly mounted on the sliding frame (44). The movable block (46) is slidably connected to the sliding frame (44), the output end of the longitudinal drive cylinder (45) is fixedly connected to the movable block (46), the lifting drive cylinder (47) is fixedly connected to the movable block (46), the connecting plate (48) is fixedly connected to the output end of the lifting drive cylinder (47), the rotating cylinder (49) is fixedly installed on the outer wall of one side of the connecting plate (48), and the number of the suction cups (41) is two, one of which is fixedly connected to the outer wall of one side of the connecting plate (48), and the other suction cup (41) is connected to the output end of the rotating cylinder (49).

5. The device for cutting and sewing leather decorative pieces of a drawstring bag according to claim 1, characterized in that: The material roll unwinding mechanism (5) comprises a material roll frame (51) and a material roll driving mechanism (52), wherein the material roll frame (51) and the material roll driving mechanism (52) are both connected to the frame (1), and the material roll in the material roll frame (51) is connected to the supporting plate (31) via the material roll driving mechanism (52).

6. A device for cutting and sewing leather decorative pieces of a drawstring bag according to claim 5, characterized in that: The material roll driving mechanism (52) comprises a first fixed plate (521), a second fixed plate (522), a driving motor (523), a driving shaft (524) and a driven shaft (525); the first fixed plate (521) and the second fixed plate (522) are both fixedly connected to the frame (1); the driving shaft (524) is rotatably connected between the first fixed plate (521) and the second fixed plate (522); one end of the driving shaft (524) passes through and extends to an outer wall on one side of the first fixed plate (521); the driving motor (523) is fixedly mounted on the frame (1); an output end of the driving motor (523) is in transmission connection with the driving shaft (524); there are two driven shafts (525), one of which is rotatably connected between the first fixed plate (521) and the second fixed plate (522); and the other driven shaft (525) is rotatably connected to an outer wall on one side of the first fixed plate (521).

7. A device for cutting and sewing leather decorative pieces of a drawstring bag according to claim 1, characterized in that: The invention also comprises a decorative sheet fixing mechanism (7), the decorative sheet fixing mechanism (7) comprising a polygonal block (71), a telescopic driving cylinder (72) and a guide plate (73), the telescopic driving cylinder (72) being fixedly mounted on an outer wall of one side of the frame (1), a first channel and a second channel being provided inside the polygonal block (71), and the guide plate (73) being fixedly mounted on the frame (1).

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