A lower film automatic deviation correcting device of a stretch film vacuum packaging machine

Abstract

The utility model relates to the technical field of stretch film packaging equipment, and particularly relates to a lower film automatic deviation rectifying device of stretch film vacuum packaging machine, its simple and light structure can carry out independent deviation rectifying operation to different parts of the lower film, improve the precision and timeliness of lower film deviation rectification, including feeding frame, auxiliary roll and guide roller, the feeding frame is installed on the packaging machine, and the auxiliary roll and guide roller are rotatably installed on the feeding frame, further include detection component and deviation rectifying roller, the deviation rectifying roller includes axle rod, main roll and push assembly, the axle rod is installed on the feeding frame, the main roll concentric rotation is installed on the outside of axle rod and can move left and right, the main roll is cooperated with auxiliary roll and carries out rolling conveying to the lower film, the detection component is installed on the feeding frame, and the detection component is used for detecting the position of the edge of the lower film on the main roll, the push assembly is installed on the feeding frame, and the push assembly is used for driving the main roll to move along the axial movement of axle rod.

Description

Technical Field

[0001] This utility model relates to the technical field of stretch film packaging equipment, and in particular to an automatic film correction device for a stretch film vacuum packaging machine. Background Technology

[0002] In the food packaging industry, stretch film vacuum packaging machines are generally used for fast and efficient vacuum packaging of food. During operation, these machines require a deviation correction device to precisely control the running path of the upper and lower films and prevent deviation. In the prior art, Chinese utility model patent CN221024345U discloses an automatic deviation correction device for the lower film of a stretch film vacuum packaging machine. This device includes a lower film feeding rack, on which an air shaft and several rollers are installed; it also includes an automatic deviation correction frame, a deviation correction motor, a deviation correction sensor, and a PLC control system. This invention uses a sensor probe to monitor the running status of the lower film in real time. The sensing area of ​​the sensor probe can accurately identify the edge distance of the lower film and send the sensing signal to the PLC control system. The PLC control system controls the action of the correction motor through the received signal to achieve the overall precise movement of the lower film. The movement is smooth and stable, achieving automatic and precise correction. Ultimately, the adhesion deviation between the upper and lower films of the product after heat sealing is almost zero, truly solving the problem of film misalignment caused by upper film deviation.

[0003] However, the aforementioned prior art requires the entire lower film loading rack to be moved left and right when correcting the lower film, thereby correcting the left and right position of the lower film. This results in a complex and bulky structure for the correction device. Moreover, the movement of the entire lower film loading rack causes multiple lower film rollers on it to move together, so it is not possible to drive each lower film roller separately for independent correction. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an automatic lower film correction device for a stretch film vacuum packaging machine that is simple and lightweight in structure, capable of independently correcting different parts of the lower film, thereby improving the accuracy and timeliness of lower film correction.

[0005] This utility model discloses an automatic film correction device for a stretch film vacuum packaging machine, comprising a feeding frame, a secondary roller, and a guide roller. The feeding frame is mounted on the packaging machine, and the secondary roller and guide roller are rotatably mounted on the feeding frame. It also includes a detection component and a correction roller. The correction roller comprises a shaft, a main roller, and a pushing component. The shaft is mounted on the feeding frame, and the main roller is concentrically rotatably mounted on the outside of the shaft, allowing it to move left and right. The main roller and secondary roller cooperate to roll and convey the lower film. The detection component is mounted on the feeding frame and is used to detect the position of the edge of the lower film on the main roller. The pushing component is mounted on the feeding frame and is used to drive the main roller to move axially along the shaft. Multiple correction rollers can be configured as needed. The push component is electrically connected to the detection component. After the lower film passes around the guide roller, it passes between the auxiliary roller and the main roller. The guide roller guides the lower film, and the auxiliary roller and the main roller roll and press the two sides of the lower film together. During the lower film conveying process, the detection component monitors the position of the lower film edge on the main roller in real time. When the position of the lower film deviates, the push component drives the main roller to move left and right in the axial direction of the shaft according to the monitoring signal of the detection component, thereby correcting the lower film. Compared with the existing technology that uses correction rollers installed on the loading rack to correct the lower film, the structure is simple and lightweight. By enabling multiple correction rollers to perform independent correction operations on different parts of the lower film during the loading process, the accuracy and timeliness of the lower film correction are improved.

[0006] Preferably, it also includes a bearing and a sleeve. The inner ring of the bearing is fitted onto the shaft, and the sleeve is fitted onto the outer ring of the bearing. The main roller is slidably mounted on the outer wall of the sleeve. The bearing rotates to support the sleeve, and the main roller slides along the axial direction of the shaft and is fitted onto the outer wall of the sleeve. In order to improve the stability of the main roller and the sleeve, a spline pair structure is set between the main roller and the sleeve to realize the rotation and axial movement of the shaft on the main roller, which has good practicality.

[0007] Preferably, the detection component includes a photosensitive element and a light source unit. Multiple light-transmitting holes are evenly arranged in a matrix around the circumference of the main roller. The photosensitive element is mounted on the outer wall of the shaft, located inside the light-transmitting holes. The light source unit is mounted on the loading rack, located outside the main roller, facing the photosensitive element. The photosensitive element is electrically connected to the pushing component. The light source unit emits light, which passes through the light-transmitting holes of the main roller and illuminates the photosensitive element, generating a corresponding electrical signal. The pushing component receives this electrical signal. When the lower film deviates, the light-transmitting holes blocked by the lower film change, causing a change in the electrical signal generated by the photosensitive element. The pushing component drives the main roller to move left and right according to the change in the electrical signal, thereby achieving automatic correction of the lower film. By setting multiple light-transmitting holes with different axial and circumferential densities, different detection and correction accuracies can be achieved.

[0008] Preferably, it also includes a screw, which is adjustablely mounted on the feeding rack, and the light source unit is mounted on the end of the screw; the light source unit is mounted on the feeding rack via the screw, thereby allowing the position of the light source unit to be adjusted left and right, improving versatility.

[0009] Preferably, the pushing assembly includes a push cylinder, bolts, and a thrust bearing. The fixed end of the push cylinder is mounted on the feeding frame, and the piston rod end of the push cylinder is connected to the outer ring of the thrust bearing by bolts. The inner end of the thrust bearing is concentrically connected to the end of the main roller. The controller of the push cylinder is electrically connected to the photosensitive element. When correction is required, the piston rod of the push cylinder extends and retracts, pushing the thrust bearing to move left and right along the shaft axis through the bolts, thereby realizing the axial movement of the main roller, which is practical.

[0010] Preferably, it also includes a connecting plate, which is installed and connected to the central shaft of the auxiliary roller and the feeding frame in a way that allows them to move left and right. One end of the connecting plate is connected to the central shaft of the auxiliary roller, and the other end of the connecting plate is connected to a bolt. The auxiliary roller is connected to the bolt and the thrust bearing through the connecting plate, so that the piston of the push cylinder can simultaneously push the main roller and the auxiliary roller to move left and right, thereby correcting the deviation of the lower film between the main roller and the auxiliary roller and improving the reliability of the deviation correction.

[0011] Preferably, it also includes two slide tables, two sliders, and two springs. The two slide tables are mounted opposite each other on the left and right side walls of the feeding frame. Sliders are slidably mounted on both slide tables. The two ends of the shaft of the auxiliary roller are respectively connected to the two sliders. One end of each of the two springs is connected to the two sliders, and the other end of each spring is connected to the two slide tables. The elastic force of the two springs pushes the auxiliary roller toward the main roller. The two sliders are slidably mounted in the two slide tables. The elastic force of the two springs pushes the two sliders toward the main roller, thereby causing the auxiliary roller to roll and press the lower film onto the main roller and maintain the pressing force.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: the correction roller installed on the feeding rack is used to correct the deviation of the lower film. The structure is simple and lightweight. By enabling multiple correction rollers to perform independent correction operations on different parts of the lower film during the feeding process, the accuracy and timeliness of the lower film correction are improved. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a schematic diagram of the isometric structure of this utility model; Figure 4 It is a structural diagram of the auxiliary roller, shaft, main roller, drive assembly, bearing, sleeve and photosensitive element, etc. Figure 5 It is a structural diagram of components such as the push cylinder, bolts, thrust bearing, and connecting plate; Figure 6 It is a structural diagram of the auxiliary roller, slide table, slider and spring.

[0014] The following components are labeled in the attached diagram: 1. Feeding rack; 2. Auxiliary roller; 3. Guide roller; 4. Detection assembly; 5. Shaft; 6. Main roller; 7. Push assembly; 8. Bearing 1; 9. Sleeve; 10. Photosensitive element; 11. Light source unit; 12. Screw; 13. Push cylinder; 14. Bolt; 15. Thrust bearing; 16. Connecting plate; 17. Slide table; 18. Slider; 19. Spring. 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 4 and Figure 5As shown, an automatic film correction device for a stretch film vacuum packaging machine includes a feeding frame 1, an auxiliary roller 2, and a guide roller 3. The feeding frame 1 is mounted on the packaging machine, and the auxiliary roller 2 and guide roller 3 are rotatably mounted on the feeding frame 1. It also includes a detection component 4 and a correction roller. The correction roller includes a shaft 5, a main roller 6, and a pushing component 7. The shaft 5 is mounted on the feeding frame 1, and the main roller 6 is concentrically rotatably mounted on the outside of the shaft 5, allowing it to move left and right. The main roller 6 cooperates with the auxiliary roller 2 to roll and convey the lower film. The detection component 4 is mounted on the feeding frame 1 and is used to detect the position of the edge of the lower film on the main roller 6. The pushing component 7 is mounted on the feeding frame 1 and is used to drive the main roller 6 to move axially along the shaft 5. It also includes a bearing 8 and a sleeve 9. The inner ring of the bearing 8 is fitted onto the shaft 5, and the sleeve 9 is fitted onto the outer ring of the bearing 8. The main roller 6 is slidably mounted on the outer wall of the sleeve 9. The detection component 4 includes a light sensor. The system includes an element 10 and a light source unit 11. Multiple light-transmitting holes are evenly arranged in a matrix around the circumference of the main roller 6. The light-sensing element 10 is mounted on the outer wall of the shaft 5, located inside the light-transmitting holes. The light source unit 11 is mounted on the feeding frame 1, located outside the main roller 6, facing the light-sensing element 10. It also includes a screw 12, which is adjustablely mounted on the feeding frame 1. The light source unit 11 is mounted on the end of the screw 12. Furthermore, it includes two slides 17, two sliders 18, and two springs 19. The two slides 17 are mounted opposite each other on the left and right side walls of the feeding frame 1. Slider 18 is slidably mounted on each of the two slides 17. The two ends of the shaft of the auxiliary roller 2 are connected to the two sliders 18 respectively. One end of each of the two springs 19 is connected to the two sliders 18 respectively, and the other end of each spring 19 is connected to the two slides 17 respectively. The elastic force of the two springs 19 pushes the auxiliary roller 2 towards the main roller 6.

[0017] Multiple correction rollers can be set as needed. Bearing 8 rotates and supports the sleeve 9. The main roller 6 slides along the axial direction of the shaft 5 and is fitted onto the outer wall of the sleeve 9. To improve the stability of the main roller 6 and the sleeve 9, a spline pair structure is set between the main roller 6 and the sleeve 9 to realize the rotation and axial movement of the shaft 5 on the main roller 6. The guide roller 3 guides the lower film. The auxiliary roller 2 and the main roller 6 roll and press the lower film on both sides. Two sliders 18 are slidably installed in two slide tables 17. The elastic force of two springs 19 pushes the two sliders 18 toward the main roller 6, so that the auxiliary roller 2 rolls and presses the lower film onto the main roller 6 and maintains the pressing force. During the lower film conveying process, the light source unit 11 is installed on the loading rack 1 through the screw 12, so that the position of the light source unit 11 can be adjusted left and right. The photosensitive element 10 is electrically connected to the pushing assembly 7. The light source unit 11 emits light, which shines through the light-transmitting hole of the main roller 6 onto the photosensitive element 10, causing the photosensitive element 10 to generate a corresponding electrical signal. This signal drives the component 7 to receive the signal. When the lower film deviates, the light-transmitting hole blocked by the lower film changes, which in turn causes the electrical signal generated by the photosensitive element 10 to change. The component 7 then drives the main roller 6 to move left and right according to the change in the electrical signal, thereby achieving automatic correction of the lower film. By setting multiple light-transmitting holes with different axial and circumferential densities, different detection and correction accuracies can be achieved. Compared with the existing technology that uses correction rollers installed on the feeding rack 1 to correct the lower film, the structure is simple and lightweight. By enabling multiple correction rollers to perform independent correction operations on different parts of the lower film during the feeding process, the accuracy and timeliness of the lower film correction are improved. Example 2

[0018] like Figure 4 and Figure 5 As shown, based on Embodiment 1, the pushing assembly 7 includes a push cylinder 13, a bolt 14, and a thrust bearing 15. The fixed end of the push cylinder 13 is mounted on the feeding frame 1. The piston rod end of the push cylinder 13 is connected to the outer ring of the thrust bearing 15 through the bolt 14. The inner end of the thrust bearing 15 is concentrically connected to the end of the main roller 6. It also includes a connecting plate 16. The central axis of the auxiliary roller 2 is mounted and connected to the feeding frame 1 in a way that allows it to move left and right. One end of the connecting plate 16 is connected to the central axis of the auxiliary roller 2, and the other end of the connecting plate 16 is connected to the bolt 14.

[0019] The controller of the push cylinder 13 is electrically connected to the photosensitive element 10. When correction is required, the piston rod of the push cylinder 13 extends and retracts, pushing the thrust bearing 15 to move left and right along the shaft 5 through the bolt 14, thereby realizing the axial movement of the main roller 6. The auxiliary roller 2 is connected to the bolt 14 and the thrust bearing 15 through the connecting plate 16, so that the piston of the push cylinder 13 simultaneously pushes the main roller 6 and the auxiliary roller 2 to move left and right, thereby correcting the lower film between the main roller 6 and the auxiliary roller 2 and improving the reliability of correction.

[0020] like Figures 1 to 6As shown, the present invention discloses an automatic film correction device for a stretch film vacuum packaging machine. During operation, the lower film first passes over the guide roller 3 and then between the auxiliary roller 2 and the main roller 6. The guide roller 3 guides the lower film, and the elastic force of two springs 19 pushes two sliders 18 towards the main roller 6, thereby causing the auxiliary roller 2 to roll and press the lower film onto the main roller 6, pressing both sides of the lower film together. Then, during the lower film conveying process, the light source unit 11 emits light, and the light shines through the light-transmitting hole of the main roller 6 onto the photosensitive element 10, causing the photosensitive element 10 to generate a corresponding electrical signal. The controller of the push cylinder 13 receives the above electrical signal. Then, when the lower film deviates, the light-transmitting hole blocked by the lower film changes, thereby changing the electrical signal generated by the photosensitive element 10. The push cylinder 13 drives the main roller 6 and the auxiliary roller 2 to move synchronously left and right according to the change in the above electrical signal, finally correcting the lower film deviation.

[0021] The main functions achieved by this utility model are: 1. The lower film is corrected by a correction roller installed on the feeding frame 1, which has a simple and lightweight structure; 2. By enabling multiple correction rollers to independently correct different parts of the lower film during the feeding process, the accuracy and timeliness of the lower film correction are improved. 3. By setting multiple light-transmitting holes with different axial and circumferential densities, different detection and correction accuracies can be achieved.

[0022] This utility model discloses an automatic film correction device for a stretch film vacuum packaging machine. Its installation, connection, and setting methods are all common mechanical methods, and any method that achieves the desired beneficial effect can be implemented. The components of this automatic film correction device for a stretch film vacuum packaging machine—including the feeding rack 1, auxiliary roller 2, guide roller 3, detection component 4, shaft 5, main roller 6, pushing component 7, bearing 8, sleeve 9, photosensitive element 10, light source unit 11, screw 12, push cylinder 13, bolt 14, thrust bearing 15, connecting plate 16, slide table 17, slider 18, and spring 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. An automatic film correction device for a stretch film vacuum packaging machine, comprising a feeding rack (1), a secondary roller (2), and a guide roller (3), wherein the feeding rack (1) is mounted on the packaging machine, and the secondary roller (2) and the guide roller (3) are rotatably mounted on the feeding rack (1); characterized in that, It also includes a detection component (4) and a correction roller. The correction roller includes a shaft (5), a main roller (6) and a push component (7). The shaft (5) is mounted on the feed rack (1). The main roller (6) is concentrically mounted on the outside of the shaft (5) and can move left and right. The main roller (6) cooperates with the auxiliary roller (2) to roll and convey the lower film. The detection component (4) is mounted on the feed rack (1). The detection component (4) is used to detect the position of the edge of the lower film on the main roller (6). The push component (7) is mounted on the feed rack (1). The push component (7) is used to drive the main roller (6) to move along the axial direction of the shaft (5).

2. The automatic film correction device for a stretch film vacuum packaging machine as described in claim 1, characterized in that, It also includes a bearing (8) and a sleeve (9). The inner ring of the bearing (8) is fitted onto the shaft (5), and the sleeve (9) is fitted onto the outer ring of the bearing (8). The main roller (6) is slidably mounted on the outer wall of the sleeve (9).

3. The automatic film correction device for a stretch film vacuum packaging machine as described in claim 1, characterized in that, The detection component (4) includes a photosensitive element (10) and a light source unit (11). Multiple light-transmitting holes are uniformly arranged in a matrix around the main roller (6). The photosensitive element (10) is installed on the outer wall of the shaft (5) and is located inside the light-transmitting hole. The light source unit (11) is installed on the feeding rack (1) and is located outside the main roller (6). The light source unit (11) faces the photosensitive element (10).

4. The automatic film correction device for a stretch film vacuum packaging machine as described in claim 3, characterized in that, It also includes a screw (12), which is adjustablely mounted on the feed rack (1), and a light source unit (11) is mounted on the end of the screw (12).

5. The automatic film correction device for a stretch film vacuum packaging machine as described in claim 1, characterized in that, The push assembly (7) includes a push cylinder (13), a bolt (14) and a thrust bearing (15). The fixed end of the push cylinder (13) is mounted on the feed rack (1). The piston rod end of the push cylinder (13) is connected to the outer ring of the thrust bearing (15) by the bolt (14). The inner end of the thrust bearing (15) is concentrically connected to the end of the main roller (6).

6. The automatic film correction device for a stretch film vacuum packaging machine as described in claim 5, characterized in that, It also includes a connecting plate (16), the central shaft of the auxiliary roller (2) is installed and connected to the feed rack (1) which can move left and right, one end of the connecting plate (16) is connected to the central shaft of the auxiliary roller (2), and the other end of the connecting plate (16) is connected to the bolt (14).

7. The automatic film correction device for a stretch film vacuum packaging machine as described in claim 1, characterized in that, It also includes two slides (17), two sliders (18) and two springs (19). The two slides (17) are installed opposite each other on the left and right side walls of the feeding rack (1). The sliders (18) are slidably installed on both slides (17). The two ends of the shaft of the auxiliary roller (2) are connected to the two sliders (18) respectively. One end of the two springs (19) is connected to the two sliders (18) respectively. The other end of the two springs (19) is connected to the two slides (17) respectively. The elastic force of the two springs (19) pushes the auxiliary roller (2) toward the main roller (6).

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