A film pulling device for a packaging machine

Abstract

The utility model relates to the technical field of packing machine, in particular to a kind of pulling membrane device of packing machine, it adopts magnetic force compression, not influenced by spring fatigue and cylinder air pressure fluctuation, and compression degree is more stable;Including square, driving roller and movable roller;Still include two slide rails, two sliding blocks, two magnetic block seats one, two strong magnetic blocks one and two strong magnetic blocks two, driving roller has servo motor assembly drive, two slide rails are oppositely installed on the upper inner wall and lower inner wall of square, two sliding blocks are respectively slidably installed on two slide rails, the rotating shaft both ends of movable roller are respectively installed on two sliding blocks, two magnetic block seats one are respectively installed on two sliding blocks, strong magnetic block one is installed on two magnetic block seats one, two strong magnetic blocks one are located in the side opposite to driving roller, two strong magnetic blocks two are installed in the interior of square, two strong magnetic blocks two are respectively opposite to two strong magnetic blocks one, and the end magnetic pole of two strong magnetic blocks two and strong magnetic block one opposite is same.

Description

Technical Field

[0001] This utility model relates to the technical field of packaging machines, and in particular to a film-pulling device for a packaging machine. Background Technology

[0002] Packaging machines require a film-pulling device to pull and convey the packaging film. A Chinese utility model patent with publication number CN220281853U discloses a servo film-pulling device for packaging machines. This device includes a frame, a film-pulling mechanism, a film-pressing mechanism, and a push-button manual valve. The film-pulling mechanism is connected to the lower part of the frame, the film-pressing mechanism is located inside the frame, and the push-button manual valve is connected to the film-pressing mechanism. The film-pressing mechanism includes a drive assembly and a movable roller. The drive assembly includes a fixed block, a mounting block, a slide bar, a slider, and a cylinder. Compared with traditional technologies, the use of a cylinder structure instead of a traditional spring structure improves the control force of the equipment and effectively prevents insufficient friction between the film-pulling roller and the packaging film, thus preventing relative sliding and reduced film-pulling efficiency.

[0003] However, the movable roller of the aforementioned film-pulling device is driven and pressed by a cylinder, which causes the pressure of the packaging film to be affected by the pressure fluctuation of the high-pressure air, resulting in large pressure fluctuations and poor stability. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a film-pulling device for packaging machines that uses magnetic force to press, is not affected by spring fatigue and cylinder air pressure fluctuations, and has a more stable pressing force.

[0005] This utility model discloses a film-pulling device for a packaging machine, comprising a frame, a drive roller, and a movable roller. The drive roller is rotatably mounted inside the frame, and the movable roller is located inside the frame, parallel to the drive roller. It also includes two slide rails, two sliders, two magnetic block seats, two strong magnetic blocks, and two strong magnetic blocks. The drive roller is driven by a servo motor assembly. The two slide rails are mounted opposite each other on the upper and lower inner walls of the frame. The two sliders are slidably mounted on the two slide rails. The two ends of the movable roller's shaft are respectively mounted on the two sliders. The two magnetic block seats are respectively mounted on the two sliders, and each of the two magnetic block seats has a strong magnetic block installed on it. Both strong magnetic blocks are located on the side opposite to the drive roller. The two strong magnetic blocks are installed inside the frame, and are respectively connected to the two slide rails. Two strong magnetic blocks are positioned opposite each other, and the ends of two strong magnetic blocks opposite to the first strong magnetic block have the same magnetic poles. The packaging film is passed between the active roller and the movable roller. The movable roller is slidably mounted on two slide rails via two sliders. The positions of the two strong magnetic blocks are adjusted so that the repulsive force between the two strong magnetic blocks and the two strong magnetic blocks pushes the two magnetic block seats and the two sliders toward the active roller, thereby pressing the movable roller onto the active roller. This causes the movable roller and the active roller to roll and press the packaging film. The servo motor assembly drives the active roller to rotate, and the friction between the active roller and the movable roller causes them to rotate relative to each other, thereby pulling and conveying the packaging film backward. Compared with the existing spring pressing and cylinder pressing technologies, magnetic pressing is not affected by spring fatigue and cylinder air pressure fluctuations, resulting in more stable pressing force and better stability and reliability.

[0006] Preferably, it further includes two guide rods, one end of which is concentrically mounted on the second strong magnetic block, and the other end of which passes through the central holes of the first strong magnetic block and the first magnetic block seat, respectively; the two guide rods slide and guide the first magnetic block seat and the first strong magnetic block, respectively, and limit and constrain the first and second strong magnetic blocks, so that the first and second strong magnetic blocks are kept in a relative arrangement, and the repulsive magnetic force between the first and second strong magnetic blocks is kept stable.

[0007] Preferably, it also includes two limiting plates, which are respectively installed on the ends of the two guide rods. The two limiting plates are located on the side of the two magnetic block seats facing the drive roller. The two limiting plates respectively limit the ends of the two guide rods and the two magnetic block seats, preventing the two guide rods from disengaging from the two magnetic block seats and improving reliability.

[0008] Preferably, it also includes two magnetic block seats, with two strong magnetic blocks installed on the two magnetic block seats respectively. The two magnetic block seats are used to support and limit the two strong magnetic blocks. By setting two magnetic block seats to install and support the two strong magnetic blocks, the stability and reliability of the two strong magnetic blocks are improved.

[0009] Preferably, the assembly also includes two driven wheels, two driving wheels, two transmission belts, and a dual-output geared motor. The two driven wheels are rotatably mounted on the upper and lower inner walls of the middle part of the frame, respectively. The two driving wheels are rotatably mounted on the upper and lower inner walls of the outer part of the frame, respectively. One end of each transmission belt is fitted to one of the two driven wheels, and the other end of each transmission belt is fitted to one of the two driving wheels. The dual-output geared motor is mounted on the frame, and its output shaft is connected to the two driving wheels. Two magnetic block seats are mounted opposite each other on the two transmission belts. The dual-output geared motor drives the two driving wheels to rotate, and the two driving wheels and the two driven wheels synchronously drive the two transmission belts to rotate, causing the two transmission belts to move the two magnetic block seats, thereby adjusting the relative distance between the two strong magnetic blocks and the two strong magnetic blocks, thus adjusting the repulsive magnetic force between the two strong magnetic blocks and the two strong magnetic blocks, and consequently adjusting the clamping force between the movable roller and the driving roller.

[0010] Preferably, it also includes two pressure sensors and two contact blocks. The two pressure sensors are respectively installed on the upper inner wall and the lower inner wall of the frame. Each pressure sensor is provided with a contact block, and the two contact blocks contact the two sliders respectively. When the two strong magnetic blocks drive the two sliders with magnetic force, the two pressure sensors detect the thrust of the two sliders, and then detect the clamping force between the movable roller and the active roller. This makes the two pressure sensors electrically connected to the controller of the dual-output geared motor, so as to automatically adjust the operating state of the dual-output geared motor according to the detected pressure value, which has good practicality.

[0011] Preferably, it also includes two push cylinders and two friction blocks. The two push cylinders are respectively installed on the two magnetic block seats, and the two friction blocks are respectively installed on the lower end of the piston rods of the two push cylinders. After the clamping force between the movable roller and the driving roller is adjusted, the piston rods of the two push cylinders extend downward to press the two friction blocks against the side wall of the frame, thereby locking the two magnetic block seats and improving the stability of the movable roller.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: The packaging film is passed between the active roller and the movable roller. The movable roller is slidably mounted on two slide rails by two sliders. The position of the two strong magnetic blocks is adjusted so that the repulsive force between the two strong magnetic blocks and the two strong magnetic blocks pushes the two magnetic block seats and the two sliders toward the active roller, thereby pressing the movable roller onto the active roller. This causes the movable roller and the active roller to roll and press the packaging film. The servo motor assembly drives the active roller to rotate. The active roller rubs against the movable roller and rotates relative to it, thereby pulling and conveying the packaging film backward. Compared with the spring pressing and cylinder pressing of the prior art, magnetic pressing is not affected by spring fatigue and cylinder air pressure fluctuations. The pressing force is more stable, and the stability and reliability are better. Attached Figure Description

[0013] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the isometric structure of this utility model; Figure 3 This is a schematic diagram of the left side structure of this utility model; Figure 4 It is a structural diagram of the movable roller, slide rail, slider, magnetic block seat one, strong magnetic block one, strong magnetic block two, magnetic block seat two, and pressure sensor, etc. Figure 5 This is a structural diagram showing the disassembled state of the movable roller, slide rail, strong magnetic block one, strong magnetic block two, guide rod, magnetic block seat two, limit plate, push cylinder and friction block, etc. Figure 6 It is a structural diagram of the drive pulley, transmission belt, dual-output geared motor and driven pulley.

[0014] The following are labels in the attached diagram: 1. Frame; 2. Drive roller; 3. Movable roller; 4. Slide rail; 5. Slider; 6. Magnetic block seat one; 7. Strong magnetic block one; 8. Strong magnetic block two; 9. Guide rod; 10. Magnetic block seat two; 11. Drive wheel; 12. Transmission belt; 13. Dual-output geared motor; 14. Limit plate; 15. Pressure sensor; 16. Contact block; 17. Push cylinder; 18. Friction block; 19. Driven wheel. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0016] like Figures 1 to 5As shown, a film-pulling device for a packaging machine includes a frame 1, a drive roller 2, and a movable roller 3. The drive roller 2 is rotatably mounted inside the frame 1, and the movable roller 3 is located inside the frame 1, parallel to the drive roller 2. It also includes two slide rails 4, two sliders 5, two magnetic block holders 6, two strong magnetic blocks 7, and two strong magnetic blocks 8. The drive roller 2 is driven by a servo motor assembly. The two slide rails 4 are mounted opposite each other on the upper and lower inner walls of the frame 1. The two sliders 5 are slidably mounted on the two slide rails 4. The two ends of the rotating shaft of the movable roller 3 are respectively mounted on the two sliders 5. The two magnetic block holders 6 are respectively mounted on the two sliders 5, and each of the two magnetic block holders 6 has a strong magnetic block 7 mounted on it. Both strong magnetic blocks 7 are located on the side opposite to the drive roller 2. Two strong magnetic blocks 8 are installed inside the frame 1, and the two strong magnetic blocks 8 are respectively opposite to the two strong magnetic blocks 7. The magnetic poles of the opposite ends of the two strong magnetic blocks 8 and the strong magnetic blocks 7 are the same. It also includes two guide rods 9, one end of which is concentrically installed on the strong magnetic blocks 8. The two ends of the two guide rods 9 pass through the center holes of the two strong magnetic blocks 7 and the two magnetic block seats 6, respectively. It also includes two limiting plates 14, which are respectively installed on the ends of the two guide rods 9. The two limiting plates 14 are located on the side of the two magnetic block seats 6 facing the drive roller 2. It also includes two magnetic block seats 10, and the two strong magnetic blocks 8 are respectively installed on the two magnetic block seats 10. The two magnetic block seats 10 are used to support and limit the two strong magnetic blocks 8.

[0017] The packaging film is passed between the active roller 2 and the movable roller 3. The movable roller 3 is slidably mounted on two slide rails 4 via two sliders 5. The positions of the two strong magnetic blocks 8 are adjusted so that the repulsive force between the two strong magnetic blocks 8 and the two strong magnetic blocks 7 pushes the two magnetic block seats 6 and the two sliders 5 toward the active roller 2. The two guide rods 9 respectively slide guide the two magnetic block seats 6 and the two strong magnetic blocks 7, and limit the two strong magnetic blocks 7 and the two strong magnetic blocks 8, keeping the two strong magnetic blocks 7 and the two strong magnetic blocks 8 in a relatively opposite arrangement, and keeping the repulsive magnetic force between the strong magnetic blocks 7 and the two strong magnetic blocks 8 stable. The two limiting plates 14 respectively The ends of the two guide rods 9 are limited to the two magnetic block seats 6 to prevent the two guide rods 9 from disengaging from the two magnetic block seats 6. The two strong magnetic blocks 8 are installed and supported by the two magnetic block seats 10, so that the movable roller 3 is pressed on the active roller 2. The movable roller 3 and the active roller 2 roll and press the packaging film. The servo motor assembly drives the active roller 2 to rotate. The active roller 2 rubs against the movable roller 3 to rotate relative to it, thereby pulling and conveying the packaging film backward. Compared with the existing spring pressing and cylinder pressing, the magnetic pressing is not affected by spring fatigue and cylinder air pressure fluctuations. The pressing force is more stable and has better stability and reliability. Example 2

[0018] like Figures 1 to 4 and Figure 6As shown, based on Embodiment 1, it further includes two driven wheels 19, two driving wheels 11, two transmission belts 12, and a dual-output geared motor 13. The two driven wheels 19 are rotatably mounted on the upper and lower inner walls of the middle part of the frame 1, respectively. The two driving wheels 11 are rotatably mounted on the upper and lower inner walls of the outer part of the frame 1, respectively. One end of each of the two transmission belts 12 is fitted to one of the two driven wheels 19, and the other end of each transmission belt 12 is fitted to one of the two driving wheels 11. The dual-output geared motor 13 is mounted on the frame 1. The output shaft is connected to two drive wheels 11 respectively, and two magnetic block seats 10 are respectively mounted on two transmission belts 12. It also includes two pressure sensors 15 and two contact blocks 16. The two pressure sensors 15 are respectively mounted on the upper inner wall and the lower inner wall of the frame 1. Each pressure sensor 15 is provided with a contact block 16, and the two contact blocks 16 respectively contact the two sliders 5. It also includes two push cylinders 17 and two friction blocks 18. The two push cylinders 17 are respectively mounted on the two magnetic block seats 10, and the two friction blocks 18 are respectively mounted on the lower end of the piston rod of the two push cylinders 17.

[0019] A dual-output geared motor 13 drives two drive wheels 11 to rotate. The two drive wheels 11 and two driven wheels 19 synchronously drive two transmission belts 12 to rotate, causing the two transmission belts 12 to move the two magnetic block seats 10 respectively. This adjusts the relative distance between the two strong magnetic blocks 8 and 7. Two contact blocks 16 contact the two sliders 5 respectively. When the two strong magnetic blocks 8 and 7 magnetically drive the two sliders 5, two pressure sensors 15 detect the thrust of the two sliders 5, and further detect the clamping force between the movable roller 3 and the drive roller 2, causing the two... Pressure sensor 15 is electrically connected to the controller of dual-output geared motor 13, thereby automatically adjusting the operating state of dual-output geared motor 13 according to the detected pressure value, realizing the adjustment of the repulsive magnetic force between two strong magnetic blocks 8 and two strong magnetic blocks 7, and thus adjusting the clamping force between movable roller 3 and active roller 2. After the clamping force between movable roller 3 and active roller 2 is adjusted, the piston rods of two push cylinders 17 extend downward to press the two friction blocks 18 against the side wall of frame 1, thereby locking the two magnetic block seats 10 and improving the stability of movable roller 3.

[0020] like Figures 1 to 6As shown, the film-pulling device of this utility model for a packaging machine, during operation, first passes the packaging film between the drive roller 2 and the movable roller 3. Then, the dual-output reduction motor 13 drives two drive wheels 11 to rotate. The two drive wheels 11 and two driven wheels 19 synchronously drive two transmission belts 12 to rotate, so that the two transmission belts 12 respectively drive two magnetic block seats 10 to move, thereby adjusting the relative distance between the two strong magnetic blocks 8 and the two strong magnetic blocks 7, realizing the adjustment of the repulsive magnetic force between the two strong magnetic blocks 8 and the two strong magnetic blocks 7, and thus adjusting the movable roller 3 and the drive roller. The magnitude of the clamping force between the two rollers 2 is determined by two pressure sensors 15, which then detect the pushing force of the two sliders 5, thereby detecting the clamping force between the movable roller 3 and the active roller 2. After the clamping force between the movable roller 3 and the active roller 2 is adjusted, the piston rods of the two push cylinders 17 extend downward to press the two friction blocks 18 against the side wall of the frame 1, thereby locking the two magnetic block seats 10, so that the movable roller 3 and the active roller 2 roll and press the packaging film. Finally, the servo motor assembly drives the active roller 2 to rotate, and the active roller 2 rubs against the movable roller 3 to rotate relative to each other, thereby pulling and conveying the packaging film backward.

[0021] The main functions achieved by this utility model are: 1. Compared with existing technologies such as spring clamping and cylinder clamping, magnetic clamping is not affected by spring fatigue and cylinder air pressure fluctuations, and the clamping force is more stable; 2. The two guide rods 9 respectively guide the two magnetic block seats 6 and the two strong magnetic blocks 7 to slide, and limit the two strong magnetic blocks 7 and the two strong magnetic blocks 8 to keep the two strong magnetic blocks 7 and the two strong magnetic blocks 8 in a relatively arranged manner, so that the repulsive magnetic force of the strong magnetic blocks 7 and the strong magnetic blocks 8 remains stable. 3. By adjusting the two ends of the movable roller 3 synchronously, the relative distance between the two strong magnetic blocks 8 and 7 is adjusted, thereby adjusting the repulsive magnetic force between the two strong magnetic blocks 8 and 7, and thus adjusting the clamping force between the movable roller 3 and the active roller 2.

[0022] The film-pulling device of this packaging machine is installed, connected, or set in a common mechanical manner. Any method that achieves the desired beneficial effect can be implemented. The components of the film-pulling device of this packaging machine, including the frame 1, drive roller 2, movable roller 3, slide rail 4, slider 5, strong magnetic block 1 7, strong magnetic block 2 8, guide rod 9, drive wheel 11, transmission belt 12, dual-output geared motor 13, pressure sensor 15, contact block 16, push cylinder 17, friction block 18, and driven wheel 19, are commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative effort from those skilled in the art.

[0023] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A film-pulling device for a packaging machine, comprising a frame (1), a drive roller (2), and a movable roller (3), wherein the drive roller (2) is rotatably mounted inside the frame (1), and the movable roller (3) is located inside the frame (1), and the movable roller (3) is parallel to the drive roller (2); characterized in that, It also includes two slide rails (4), two sliders (5), two magnetic block seats (6), two strong magnetic blocks (7) and two strong magnetic blocks (8). The active roller (2) is driven by a servo motor assembly. The two slide rails (4) are installed opposite each other on the upper inner wall and the lower inner wall of the frame (1). The two sliders (5) are slidably installed on the two slide rails (4). The two ends of the rotating shaft of the active roller (3) are respectively installed on the two sliders (5). The two magnetic block seats (6) are respectively installed on the two sliders (5). The two magnetic block seats (6) are each equipped with strong magnetic blocks (7). The two strong magnetic blocks (7) are located on the side opposite to the active roller (2). The two strong magnetic blocks (8) are installed inside the frame (1). The two strong magnetic blocks (8) are opposite to the two strong magnetic blocks (7). The magnetic poles at the opposite ends of the two strong magnetic blocks (8) and the strong magnetic blocks (7) are the same.

2. A film drawing device for a packaging machine as claimed in claim 1, characterized in that It also includes two guide rods (9), one end of which is concentrically mounted on the second strong magnetic block (8), and the two ends of which pass through the center holes of the first strong magnetic block (7) and the first magnetic block seat (6).

3. The film-pulling device of a packaging machine as described in claim 2, characterized in that, It also includes two limiting plates (14), which are installed on the ends of two guide rods (9) and are located on the side of the two magnetic block seats (6) facing the drive roller (2).

4. A film drawing device for a packaging machine as claimed in claim 1, characterized in that It also includes two magnetic block seats (10), and two strong magnetic blocks (8) are respectively installed on the two magnetic block seats (10). The two magnetic block seats (10) are used to support and limit the two strong magnetic blocks (8).

5. A film drawing device for a packaging machine as claimed in claim 4, characterized in that It also includes two driven wheels (19), two driving wheels (11), two transmission belts (12) and a dual-output geared motor (13). The two driven wheels (19) are rotatably mounted on the upper inner wall and the lower inner wall of the middle part of the frame (1), respectively. The two driving wheels (11) are rotatably mounted on the upper inner wall and the lower inner wall of the outside of the frame (1), respectively. One end of the two transmission belts (12) is connected to the two driven wheels (19) respectively, and the other end of the two transmission belts (12) is connected to the two driving wheels (11) respectively. The dual-output geared motor (13) is mounted on the frame (1), and the output shaft of the dual-output geared motor (13) is connected to the two driving wheels (11) respectively. The two magnetic block seats (10) are respectively mounted on the two transmission belts (12).

6. A film drawing device for a packaging machine as claimed in claim 5, characterized in that It also includes two pressure sensors (15) and two contact blocks (16). The two pressure sensors (15) are respectively installed on the upper inner wall and the lower inner wall of the frame (1). Each pressure sensor (15) is provided with a contact block (16), and the two contact blocks (16) respectively contact the two sliders (5).

7. A film drawing device for a packaging machine as claimed in claim 5, characterized in that It also includes two push cylinders (17) and two friction blocks (18). The two push cylinders (17) are respectively installed on two magnetic block seats (10), and the two friction blocks (18) are respectively installed on the lower end of the piston rod of the two push cylinders (17).

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