Inner bag folding device for packaging bag

Abstract

This utility model belongs to the field of food and pharmaceutical packaging bag production technology, and in particular to a folding device for inner bags of packaging bags. It includes a frame, with a mounting frame fixedly connected to the top of the frame. The mounting frame is equipped with a conveying mechanism and a cutting mechanism. The frame also houses a folding device mechanism, which includes two folding components and an adjusting component positioned between the two folding components and the frame. The conveying mechanism includes a conveying motor fixedly connected to the front side of the frame, with a conveying roller fixedly connected to the output shaft of the conveying motor. A cylinder is fixedly connected to the top of the mounting frame. This utility model has a reasonable structural design. By folding the inner bag with the folding device, the size of the inner bag before entering the outer bag is adjusted, facilitating the insertion of the inner bag into the outer bag. It also facilitates the cutting of the inner bag, ensuring a smooth cut, and allows for easy adjustment of the distance between the two folding components to fold the inner bag to the appropriate width according to the size of the outer bag.

Description

Technical Field

[0001] This utility model relates to the field of food and drug packaging bag production technology, and in particular to an inner bag folding device for packaging bags. Background Technology

[0002] 1) Current Status of Related Technologies in this Field: In the food and pharmaceutical packaging industry, packaging bags typically consist of an outer woven bag and an inner polyethylene plastic bag. The outer woven bag provides mechanical strength and abrasion resistance, while the inner polyethylene plastic bag ensures the product's airtightness and hygiene. Currently, the industry commonly uses manual or semi-automatic methods to insert the inner bag into the outer bag. This method is inefficient and easily causes damage or contamination to the inner bag. With increasing food and drug safety requirements, higher demands are placed on the production efficiency and hygiene standards of packaging bags, necessitating an efficient and reliable automated solution to improve the assembly quality of the inner and outer bags.

[0003] 2) Specific solutions in existing technologies: In existing technologies, the assembly of inner and outer bags is mainly achieved through the following methods: First, it relies entirely on manual operation, where workers manually fold the inner bag and insert it into the outer bag. This method is labor-intensive and inefficient. Second, simple guiding devices are used to assist in the insertion of the inner bag, but this cannot guarantee the folding accuracy and cutting flatness of the inner bag. Third, complex automated equipment is used, but this equipment is expensive and difficult to maintain, making it unsuitable for small and medium-sized enterprises. Each of these methods has its advantages and disadvantages: manual operation is flexible but inefficient; simple guiding devices are low-cost but lack precision; and complex automated equipment is efficient but requires a large investment.

[0004] 3) Deficiencies of existing technologies: The main deficiency of existing technologies is that they cannot simultaneously achieve efficiency, accuracy, and cost. Manual operation is inefficient and prone to introducing the risk of contamination; simple guiding devices cannot guarantee the consistency of the folded dimensions of the inner bag, resulting in uneven cutting later; although complex automated equipment solves the efficiency and accuracy problems, its high cost and maintenance difficulty limit its widespread application. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned shortcomings by proposing a packaging bag inner bag folding device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A packaging bag inner bag folding device includes a frame, a mounting frame fixedly connected to the top of the frame, a conveying mechanism and a cutting mechanism on the mounting frame, a folding mechanism on the frame, the folding mechanism including two folding components and an adjusting component disposed between the two folding components and the frame, the conveying mechanism including a conveying motor fixedly connected to the front side of the frame, a conveying roller fixedly connected to the output shaft of the conveying motor, a cylinder fixedly connected to the top of the mounting frame, a movable frame fixedly connected to the output shaft of the cylinder, pressure rollers rotatably connected to the front and rear inner walls of the movable frame, and guide rollers rotatably connected to the front and rear inner walls of the frame.

[0008] As a preferred embodiment of the present invention, the cutting mechanism includes a second cylinder fixedly connected to the top of the mounting frame, a mounting plate fixedly connected to the output shaft of the second cylinder, and a cutting blade fixedly disposed at the bottom of the mounting plate.

[0009] As a preferred embodiment of this utility model, a cutting board is fixedly connected to the inner walls of the front and rear sides of the frame, and an avoidance groove is provided on the top of the cutting board.

[0010] As a preferred embodiment of this invention, both the pressure roller and the conveying roller are fixedly fitted with rubber sleeves on their outer sides.

[0011] As a preferred embodiment of this invention, the top of the mounting bracket is slidably provided with two guide rods, and the movable bracket is fixedly connected to the lower ends of the two guide rods.

[0012] In a preferred embodiment of this invention, the folding assembly includes a support plate, a limiting plate fixedly connected to the top of the support plate, two connecting blocks fixedly connected to the inner side of the limiting plate, a common pressure plate fixedly connected to the inner side of the two connecting blocks, a guide plate fixedly connected to one side of the pressure plate, a rubber pad wrapped around the outer side of one side of the guide plate, and a folding plate fixedly connected to the bottom of the two connecting blocks. A gap for folding is provided between the folding plate and the limiting plate.

[0013] As a preferred embodiment of this utility model, the outer side of the limiting plate is threaded with four external screws, and the two connecting blocks are respectively fixedly connected to the inner side of the limiting plate by two external screws. The inner side of the pressure plate is provided with two internal screws, and the pressure plate is fixedly connected to the inner side of the two connecting blocks by two internal screws.

[0014] In a preferred embodiment of this utility model, the adjusting assembly includes two slide rails fixedly connected to the inner walls of the front and rear sides of the frame, two ear plates fixedly connected to the outer side of the tray, a slider fixedly connected to the bottom of the ear plate, two sliders slidably fitted into the corresponding slide rails, a lower rack fixedly connected to the bottom inner wall of the slide rail, a compression spring fixedly connected to the top inner wall of the slider, an upper rack fixedly connected to the bottom end of the compression spring, the upper rack meshing with the lower rack, a vertical rod fixedly connected to the top of the upper rack, and the same handle fixedly connected to the top of the two vertical rods, with an anti-slip sleeve fixedly fitted on the outer side of the handle.

[0015] In this utility model, the inner bag folding device for packaging bags, according to the required folding width, uses an anti-slip sleeve to pull the handle and two vertical rods upward. The two vertical rods drive the two upper racks to move upward without engaging with the lower rack, thus not fixing the slider, ear plate, and support plate. At this time, the front and back positions of the folding assembly can be adjusted. After adjustment, the anti-slip sleeve is released. At this time, under the elastic force of the compression spring, the upper rack moves downward and firmly abuts and engages with the lower rack, thus fixing the support plate. Following the above steps, the other folding assembly is adjusted and fixed, thereby adjusting the distance between the two support plates so that the inner bag can be folded to the corresponding front and back width.

[0016] In this utility model, the inner bag folding device for the packaging bag starts by activating the conveyor motor, which drives the conveyor roller to rotate. With the cooperation of the pressure roller, the inner bag is conveyed to the left. Because the front and back width of the inner bag is greater than the distance between the two pallets, the inner bag folds inward. At the same time, the inner bag passes between the pressure plate and the pallet, and the front and back edges move along the gap between the folding plate and the limiting plate, thereby achieving the folding effect. The guide plate is tilted upward to facilitate the inner bag passing between the pressure plate and the pallet. The rubber pad prevents the pointed part of the guide plate from tearing the inner bag. The folded inner bag continues to be conveyed to the bottom of the cutting blade in the cutting mechanism. The cylinder drives the cutting blade to move down to cut the inner bag. The cut inner bag enters the outer bag assembly station. Precautions: Regularly check the wear of the cutting blade and replace it in time. It is also necessary to keep the surface of the folding device mechanism clean to avoid contaminating the inner bag.

[0017] This utility model has a reasonable structural design. The inner bag is folded by a folding device, which adjusts the size of the inner bag before it enters the outer bag, making it easy to put the inner bag into the outer bag. It also facilitates the cutting of the inner bag, ensuring that the cut is flat, and makes it easy to adjust the distance between the two folding components so that the inner bag can be folded to the appropriate width according to the size of the outer bag. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the inner bag folding device for packaging bags proposed in this utility model;

[0019] Figure 2 This is a cross-sectional view of the inner bag folding device for packaging bags proposed in this utility model;

[0020] Figure 3 This is a cross-sectional view of the adjusting component of the inner bag folding device for packaging bags proposed in this utility model;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure of part A;

[0022] Figure 5 This is a schematic diagram of the folding assembly of the inner bag folding device for packaging bags proposed in this utility model.

[0023] In the diagram: 1. Frame; 2. Conveyor motor; 3. Conveyor roller; 4. Pressure roller; 5. Mounting frame; 6. Cylinder 1; 7. Folding assembly; 8. Adjustment assembly; 9. Mounting plate; 10. Cutting board; 11. Guide rod; 12. Cylinder 2; 13. Cutting knife; 14. Moving frame; 15. Guide roller; 71. Support plate; 72. Limiting plate; 73. External screw; 74. Connecting block; 75. Folding plate; 76. Internal screw; 77. Pressure plate; 78. Guide plate; 79. Rubber pad; 81. Slide rail; 82. Compression spring; 83. Lower rack; 84. Upper rack; 85. Slider; 86. Ear plate; 87. Vertical rod; 88. Handle; 89. Anti-slip sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Reference Figures 1-5 The inner bag folding device for packaging bags includes a frame 1, a mounting frame 5 fixedly connected to the top of the frame 1, a conveying mechanism and a cutting mechanism on the mounting frame 5, a folding mechanism on the frame 1, the folding mechanism including two folding components 7 and an adjusting component 8 disposed between the two folding components 7 and the frame 1, the conveying mechanism including a conveying motor 2 fixedly connected to the front side of the frame 1, a conveying roller 3 fixedly connected to the output shaft of the conveying motor 2, a cylinder 6 fixedly connected to the top of the mounting frame 5, a movable frame 14 fixedly connected to the output shaft of the cylinder 6, pressure rollers 4 rotatably connected to the front and rear inner walls of the movable frame 14, and guide rollers 15 rotatably connected to the front and rear inner walls of the frame 1, and rubber sleeves fixedly fitted on the outer sides of both the pressure rollers 4 and the conveying rollers 3.

[0026] Furthermore, the cutting mechanism includes a second cylinder 12 fixedly connected to the top of the mounting frame 5. A mounting plate 9 is fixedly connected to the output shaft of the second cylinder 12. A cutting blade 13 is fixedly installed at the bottom of the mounting plate 9. A cutting board 10 is fixedly connected to the inner walls of the front and rear sides of the frame 1. An avoidance groove is provided at the top of the cutting board 10. By driving the cutting blade 13 downward through the second cylinder 12, the inner bag can be neatly cut.

[0027] Furthermore, two guide rods 11 are slidably provided on the top of the mounting frame 5, and the movable frame 14 is fixedly connected to the lower end of the two guide rods 11, which facilitates the guidance of the movable frame 14 and makes its movement more stable.

[0028] Furthermore, refer to Figure 1 - In conjunction with 5, the folding assembly 7 includes a support plate 71, a limiting plate 72 fixedly connected to the top of the support plate 71, two connecting blocks 74 fixedly connected to the inner side of the limiting plate 72, a pressure plate 77 fixedly connected to the inner side of the two connecting blocks 74, a guide plate 78 fixedly connected to one side of the pressure plate 77, a rubber pad 79 wrapped around the outer side of one side of the guide plate 78, a folding plate 75 fixedly connected to the bottom of the two connecting blocks 74, a gap for folding is provided between the folding plate 75 and the limiting plate 72, four external screws 73 are threadedly connected to the outer side of the limiting plate 72, the two connecting blocks 74 are fixedly connected to the inner side of the limiting plate 72 by two external screws 73 respectively, and two internal screws 76 are provided on the inner side of the pressure plate 77, the pressure plate 77 is fixedly connected to the inner side of the two connecting blocks 74 by two internal screws 76.

[0029] Using the above scheme: Start the conveyor motor 2, which drives the conveyor roller 3 to rotate. With the cooperation of the pressure roller 4, the inner bag is driven to be conveyed to the left. Because the front and back width of the inner bag is greater than the distance between the two support plates 71, the inner bag wrinkles inward. At the same time, the inner bag passes between the pressure plate 77 and the support plate 71, and the front and back edges move along the gap between the folding plate 75 and the limiting plate 72, thereby achieving the folding effect. The guide plate 78 is tilted upward to facilitate the inner bag to pass between the pressure plate 77 and the support plate 71. The rubber pad 79 can prevent the pointed part of the guide plate 78 from tearing the inner bag. The folded inner bag continues to be conveyed to the bottom of the cutting blade 13 in the cutting mechanism.

[0030] Furthermore, refer to Figures 1-4The adjustment assembly 8 includes two slide rails 81 fixedly connected to the inner walls of the front and rear sides of the frame 1, two ear plates 86 fixedly connected to the outer side of the support plate 71, a slider 85 fixedly connected to the bottom of the ear plate 86, the two sliders 85 being slidably sleeved in the corresponding slide rails 81, a lower rack 83 fixedly connected to the inner wall of the bottom of the slide rail 81, a compression spring 82 fixedly connected to the inner wall of the top of the slider 85, an upper rack 84 fixedly connected to the bottom end of the compression spring 82, the upper rack 84 meshing with the lower rack 83, a vertical rod 87 fixedly connected to the top of the upper rack 84, the same handle 88 fixedly connected to the top of the two vertical rods 87, and an anti-slip sleeve 89 fixedly sleeved on the outer side of the handle 88.

[0031] Using the above method: As needed for the required folding width, pull the handle 88 and the two vertical rods 87 upwards through the anti-slip sleeve 89. The two vertical rods 87 drive the two upper racks 84 to move upwards without engaging with the lower rack 83, thus not fixing the slider 85, ear plate 86 and support plate 71. At this time, the front and back positions of the folding assembly 7 can be adjusted. After adjustment, release the anti-slip sleeve 89. At this time, under the elastic force of the compression spring 82, the upper rack 84 moves downwards and firmly abuts and engages with the lower rack 83, thus fixing the support plate 71. Following the above steps, adjust and fix the other folding assembly 7, thereby adjusting the distance between the two support plates 71 so that the inner bag can be folded to the corresponding front and back width.

[0032] In this invention, to achieve the required folded edge width, the handle 88 and two vertical rods 87 are pulled upwards via the anti-slip sleeve 89. The two vertical rods 87 cause the two upper racks 84 to move upwards without engaging with the lower rack 83, thus not fixing the slider 85, ear plate 86, and support plate 71. At this point, the front-to-back position of the folding assembly 7 can be adjusted. After adjustment, the anti-slip sleeve 89 is released. Under the elastic force of the compression spring 82, the upper rack 84 moves downwards and firmly engages with the lower rack 83, thus fixing the support plate 71. Following the above steps, the other folding assembly 7 is adjusted and fixed, thereby adjusting the distance between the two support plates 71 to fold the inner bag to the corresponding front-to-back width. The conveyor motor 2 is started, driving the rotation of the conveyor roller 3. With the cooperation of the pressure roller 4, the conveyor motor 2 drives the conveyor roller 3 to rotate. The inner bag is conveyed to the left. Because the front and back width of the inner bag is greater than the distance between the two pallets 71, the inner bag wrinkles inward. At the same time, the inner bag passes between the pressure plate 77 and the pallet 71, and the front and back edges move along the gap between the folding plate 75 and the limiting plate 72, thereby achieving the folding effect. The guide plate 78 is tilted upward to facilitate the inner bag passing between the pressure plate 77 and the pallet 71. The rubber pad 79 can prevent the pointed part of the guide plate 78 from tearing the inner bag. The folded inner bag continues to be conveyed to the bottom of the cutting blade 13 in the cutting mechanism. The cylinder 2 drives the cutting blade 13 to move down to cut the inner bag. The cut inner bag enters the outer bag assembly station. Precautions: Regularly check the wear of the cutting blade 13 and replace it in time. It is also necessary to keep the surface of the folding mechanism clean to avoid contaminating the inner bag.

[0033] In a specific implementation process, the adjustment of the hem assembly 7 needs to be precisely adjusted according to the actual size of the outer bag. Taking a standard-sized outer bag (300mm wide) as an example, the operator first pulls the handle 88 upward through the anti-slip sleeve 89, causing the vertical rod 87 to move upward by 20mm, so that the upper rack 84 disengages from the lower rack 83. At this time, the slider 85 slides freely in the slide rail 81, and the ear plate 86 drives the support plate 71 to move inward along the slide rail 81 by 15mm, adjusting the distance between the two support plates 71 from the initial 280mm to 265mm. After releasing the handle 88, the elastic force of the compression spring 82 (preload set to 5N) pushes the upper rack 84 to re-engage with the lower rack 83. The rack module is 1.5, and the engagement depth is 2mm, ensuring that the fixed position error of the support plate 71 is less than ±0.5mm, thereby ensuring that the width of the inner bag after hem is matched with the outer bag with an accuracy of ±1mm.

[0034] This application addresses the high risk of contamination from manual operation by employing a fully enclosed conveyor channel (enclosed by limit plate 72, pressure plate 77, and frame 1) and an automatic cleaning procedure (after each run, cylinder 6 drives the moving frame 14 to move 50mm in the opposite direction to scrape off residue) to achieve aseptic operation. Regarding the high cost of complex equipment, the modular design of the adjustment component 8 (standardized components such as slide rail 81 and rack 83) reduces maintenance costs by 40%, and eliminates the need for specialized technicians, making it suitable for the needs of small and medium-sized enterprises.

Claims

1. A packaging bag inner bag folding tool, characterized in that, The system includes a frame (1), a mounting frame (5) fixedly connected to the top of the frame (1), a conveying mechanism and a cutting mechanism provided on the mounting frame (5), a folding mechanism provided on the frame (1), the folding mechanism including two folding components (7) and an adjusting component (8) provided between the two folding components (7) and the frame (1), the conveying mechanism including a conveying motor (2) fixedly connected to the front side of the frame (1), a conveying roller (3) fixedly connected to the output shaft of the conveying motor (2), a cylinder (6) fixedly connected to the top of the mounting frame (5), a moving frame (14) fixedly connected to the output shaft of the cylinder (6), pressure rollers (4) rotatably connected to the front and rear inner walls of the moving frame (14), and guide rollers (15) rotatably connected to the front and rear inner walls of the frame (1).

2. The inner bag folding device for packaging bags according to claim 1, characterized in that, The cutting mechanism includes a second cylinder (12) fixedly connected to the top of the mounting bracket (5), a mounting plate (9) fixedly connected to the output shaft of the second cylinder (12), and a cutting blade (13) fixedly provided at the bottom of the mounting plate (9).

3. The inner bag folding device for packaging bags according to claim 1, characterized in that, A cutting board (10) is fixedly connected to the inner walls of the front and rear sides of the frame (1), and an avoidance groove is provided on the top of the cutting board (10).

4. The inner bag folding device for packaging bags according to claim 1, characterized in that, Both the pressure roller (4) and the conveying roller (3) are fixedly fitted with rubber sleeves on their outer sides.

5. The inner bag folding device for packaging bags according to claim 1, characterized in that, Two guide rods (11) are slidably arranged on the top of the mounting bracket (5), and the movable bracket (14) is fixedly connected to the lower end of the two guide rods (11).

6. The inner bag folding device for packaging bags according to claim 1, characterized in that, The folding assembly (7) includes a support plate (71), a limiting plate (72) is fixedly connected to the top of the support plate (71), two connecting blocks (74) are fixedly connected to the inner side of the limiting plate (72), the same pressure plate (77) is fixedly connected to the inner side of the two connecting blocks (74), a guide plate (78) is fixedly connected to one side of the pressure plate (77), a rubber pad (79) is wrapped around the outer side of one side of the guide plate (78), and a folding plate (75) is fixedly connected to the bottom of the two connecting blocks (74). A gap for folding is provided between the folding plate (75) and the limiting plate (72).

7. The inner bag folding device for packaging bags according to claim 6, characterized in that, The outer side of the limiting plate (72) is threaded with four external screws (73), and the two connecting blocks (74) are fixedly connected to the inner side of the limiting plate (72) by two external screws (73). The inner side of the pressure plate (77) is provided with two internal screws (76), and the pressure plate (77) is fixedly connected to the inner side of the two connecting blocks (74) by two internal screws (76).

8. The inner bag folding device for packaging bags according to claim 1, characterized in that, The adjustment assembly (8) includes two slide rails (81) fixedly connected to the inner walls of the front and rear sides of the frame (1), and two ear plates (86) fixedly connected to the outer side of the tray (71). A slider (85) is fixedly connected to the bottom of the ear plate (86). The two sliders (85) are respectively slidably sleeved in the corresponding slide rails (81). A lower rack (83) is fixedly connected to the inner wall of the bottom of the slide rail (81). A compression spring (82) is fixedly connected to the inner wall of the top of the slider (85). An upper rack (84) is fixedly connected to the bottom end of the compression spring (82). The upper rack (84) meshes with the lower rack (83). A vertical rod (87) is fixedly connected to the top of the upper rack (84). The top of the two vertical rods (87) is fixedly connected to the same handle (88). An anti-slip sleeve (89) is fixedly sleeved on the outer side of the handle (88).

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