Basefilm tensioning device of food packaging machine

Abstract

A bottom film tensioning device of a food packaging machine effectively solves the problems that a bottom film is prone to wrinkling, and the packaging effect is affected, and comprises a rack, a first transmission roller, a tensioning roller, a second transmission roller and the bottom film are arranged on the rack, the bottom film sequentially passes through the first transmission roller, the tensioning roller and the second transmission roller, a rotating shaft is coaxially fixed to the tensioning roller, and a rotating shaft is arranged on the rotating shaft. Sliding grooves located in the front side and the rear side of the rotating shaft are formed in the machine frame, sliding blocks are connected in the sliding grooves in an up-down sliding mode, the rotating shaft is rotationally connected with the sliding blocks, a frame located in the sliding grooves is fixed to the lower ends of the sliding blocks, and a transmission shaft is arranged on the machine frame and located below the tensioning roller. A plurality of guide columns are evenly fixed to the lower end of the frame and connected with the rack in an up-down sliding mode, the guide columns are sleeved with springs, the cam is rotated, the cam drives the frame, the sliding block and the guide columns to integrally move downwards, then the sliding block drives the tensioning roller to move downwards, and the tensioning roller drives the bottom film to be in a tensioning state.

Description

Technical Field

[0001] This utility model belongs to the technical field of food packaging equipment, and in particular relates to a bottom film tensioning device for a food packaging machine. Background Technology

[0002] Food packaging is an integral part of food products. It protects food from biological, chemical, and physical damage during its journey from the factory to the consumer. It also helps maintain the food's stable quality, facilitates consumption, and serves as the first impression of the food, attracting consumers and possessing value beyond material cost. Therefore, the food packaging process is an integral part of the food manufacturing systems engineering. In a food packaging machine, a base film is first laid on the production line, the food to be packaged is placed on it, and then an upper film is laid on top. Finally, a film winding mechanism moves the upper film, food, and base film together through a vacuum packaging machine for packaging. However, the base film is prone to wrinkles and loosening during use, leading to vacuum packaging failure and affecting subsequent packaging results. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a bottom film tensioning device for a food packaging machine, which effectively solves the problem of easy wrinkling of the bottom film and its impact on the packaging effect.

[0004] The technical solution to the technical problem is as follows: A frame is included, on which a first drive roller, a tension roller, a second drive roller, and a bottom film are mounted. The bottom film passes sequentially through the first drive roller, the tension roller, and the second drive roller. A rotating shaft is coaxially fixed to the tension roller. The frame has sliding grooves located on both sides of the rotating shaft. A slider is slidably connected vertically within the sliding grooves. The rotating shaft is rotatably connected to the slider. A frame located within the sliding groove is fixed to the lower end of the slider. A drive shaft arranged in a front-back direction is rotatably connected to the frame. The drive shaft is located below the tension roller. A cam is coaxially fixed to the drive shaft within the frame. Multiple guide posts are evenly fixed to the lower end of the frame. The guide posts are slidably connected vertically to the frame. Springs are fitted onto the guide posts, located between the frame and the frame. Rotating the cam causes the frame, slider, and guide posts to move downwards as a whole. This causes the slider to move the tension roller downwards, and the tension roller causes the bottom film to be in a tensioned state.

[0005] Preferably, the frame is fixed with a bracket on the outside of the sliding groove, the drive shaft is rotatably connected to the bracket, a motor is installed on the bracket, and the motor is coaxially fixedly connected to the drive shaft via a reducer.

[0006] Preferably, the first drive roller and the second drive roller are rotatably connected to the frame, the tension roller is located between the first drive roller and the second drive roller, the first drive roller and the second drive roller are at the same height, and the tension roller is located below the first drive roller or the second drive roller.

[0007] This invention has the following advantages over traditional equipment: it has a clever structure, using a cam, frame, guide column and spring structure to cleverly control the lifting and lowering of the tension roller, thereby adjusting the tension or loosening of the bottom film. The adjustment effect is good, the operation is simple and convenient. Attached Figure Description

[0008] Figure 1 This utility model has a three-dimensional structure. Figure 1 A schematic diagram;

[0009] Figure 2 This utility model has a three-dimensional structure. Figure 2 A schematic diagram;

[0010] Figure 3 This is a schematic diagram of the three-dimensional structure of the frame and guide post in this utility model;

[0011] Figure 4 This is a schematic diagram of the main view of the utility model.

[0012] Reference numerals in the attached drawings: 1. Frame; 2. First drive roller; 3. Tension roller; 4. Second drive roller; 5. Bottom film; 6. Rotating shaft; 7. Sliding groove; 8. Slider; 9. Frame; 10. Drive shaft; 11. Cam; 12. Guide column; 13. Spring; 14. Support; 15. Motor. Detailed Implementation

[0013] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0014] Depend on Figures 1 to 4Provided is a bottom film tensioning device for a food packaging machine, comprising a frame 1, on which a first drive roller 2, a tensioning roller 3, a second drive roller 4, and a bottom film 5 are mounted. The bottom film 5 passes sequentially through the first drive roller 2, the tensioning roller 3, and the second drive roller 4. A rotating shaft 6 is coaxially fixed to the tensioning roller 3. The frame 1 is provided with sliding grooves 7 located on both sides of the rotating shaft 6. A slider 8 is slidably connected vertically within the sliding grooves 7. The rotating shaft 6 is rotatably connected to the slider 8. A frame 9 located within the sliding grooves 7 is fixed to the lower end of the slider 8. The frame 1 is rotatably connected to the front and rear... The drive shaft 10 is oriented and located below the tension roller 3. A cam 11 is coaxially fixed to the drive shaft 10 and located inside the frame 9. Multiple guide posts 12 are evenly fixed at the lower end of the frame 9. The guide posts 12 are slidably connected to the frame 1. A spring 13 is sleeved on the guide post 12 and located between the frame 9 and the frame 1. When the cam 11 is rotated, the cam 11 drives the frame 9, the slider 8 and the guide posts 12 to move downward as a whole. In turn, the slider 8 drives the tension roller 3 to move downward, and the tension roller 3 drives the bottom film 5 to be in a tensioned state.

[0015] The frame 1 is fixed with a bracket 14 on the outside of the sliding groove 7. The drive shaft 10 is rotatably connected to the bracket 14. A motor 15 is installed on the bracket 14. The motor 15 is coaxially fixedly connected to the drive shaft 10 via a reducer.

[0016] The first drive roller 2 and the second drive roller 4 are rotatably connected to the frame 1, and the tension roller 3 is located between the first drive roller 2 and the second drive roller 4. The first drive roller 2 and the second drive roller 4 are at the same height, and the tension roller 3 is located below the first drive roller 2 or the second drive roller 4.

[0017] In use, during the operation of the food packaging machine, the bottom film 5 is sequentially transported to the packaging station via the first transmission roller 2, the tensioning roller 3, and the second transmission roller 4. When the bottom film 5 needs tensioning, the motor 15 is started. The motor 15 drives the transmission shaft 10 to rotate via a reducer, ensuring a suitable rotation speed for the transmission shaft 10. The transmission shaft 10 drives the cam 11 to rotate, and the cam 11 drives the frame 9 to move downwards. The frame 9 drives the slider 8 and guide posts 12 to move downwards as a whole. Multiple guide posts 12 simultaneously slide downwards into the frame 1, ensuring the stability of the slider 8 sliding downwards within the sliding groove 7. When spring 13 is compressed, slider 8 drives rotating shaft 6 and tension roller 3 to move downward synchronously. Tension roller 3 drives bottom film 5 to move downward, thereby effectively tensioning bottom film 5. The adjustment effect is good, the degree of automation is high, and it is safe and stable. When tension roller 3 needs to be reset, reverse motor 15 is reversed. Motor 15 drives cam 11 to reset via transmission shaft 10. Under the reset action of spring 13, frame 9 drives guide column 12 and slider 8 to reset upward. Slider 8 drives rotating shaft 6 and tension roller 3 to reset upward. The up and down position of tension roller 3 is easy to adjust, effectively controlling the tension of bottom film 5. The operation is simple, convenient and practical.

[0018] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A bottom film tensioning device for a food packaging machine, characterized in that, The machine includes a frame (1), on which are provided a first drive roller (2), a tension roller (3), a second drive roller (4), and a bottom film (5). The bottom film (5) passes through the first drive roller (2), the tension roller (3), and the second drive roller (4) in sequence. The tension roller (3) is coaxially fixed with a rotating shaft (6). The frame (1) is provided with sliding grooves (7) located on the front and rear sides of the rotating shaft (6). A slider (8) is slidably connected up and down in the sliding grooves (7). The rotating shaft (6) is rotatably connected to the slider (8). The lower end of the slider (8) is fixed with a frame (9) located in the sliding groove (7). The frame (1) is rotatably connected with a drive shaft (1) arranged in the front and rear directions. 0), the drive shaft (10) is located below the tension roller (3). The drive shaft (10) is coaxially fixed with a cam (11) located inside the frame (9). Multiple guide columns (12) are evenly fixed at the lower end of the frame (9). The guide columns (12) are slidably connected to the frame (1) and springs (13) are sleeved on the guide columns (12). The springs (13) are located between the frame (9) and the frame (1). When the cam (11) is rotated, the cam (11) drives the frame (9), slider (8) and guide column (12) to move downward as a whole. Then the slider (8) drives the tension roller (3) to move downward. The tension roller (3) drives the bottom film (5) to be in a tensioned state.

2. The bottom film tensioning device of a food packaging machine according to claim 1, characterized in that, The frame (1) is fixed with a bracket (14) on the outside of the sliding groove (7). The drive shaft (10) is rotatably connected to the bracket (14). A motor (15) is installed on the bracket (14). The motor (15) is coaxially fixedly connected to the drive shaft (10) via a reducer.

3. The bottom film tensioning device of a food packaging machine according to claim 1, characterized in that, The first drive roller (2) and the second drive roller (4) are rotatably connected to the frame (1), and the tension roller (3) is located between the first drive roller (2) and the second drive roller (4). The first drive roller (2) and the second drive roller (4) are at the same height, and the tension roller (3) is located below the first drive roller (2) or the second drive roller (4).

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