Winding film tensioning device

Abstract

The invention discloses a winding film tensioning device which comprises two mounting strips, and two guide rollers are rotationally connected between the two mounting strips. The tension adjusting mechanism comprises a lifting plate, a U-shaped plate is arranged below the lifting plate, an adjusting roller is rotationally connected between the inner walls of the two sides of the U-shaped plate, a film body is jointly wound on the adjusting roller and the two guide rollers, and two indicating rods are symmetrically and fixedly connected to the upper end of the U-shaped plate; the upper end of each indicating rod penetrates through the lifting plate and is fixedly connected with a connecting strip, and the lower end of each connecting strip is fixedly connected with a mounting rod. In the using process of the device, the spring structure is matched with the lifting mechanism, the tension of a film body can be always in a suitable range through the use of the infrared distance meter, the winding effect is guaranteed, in addition, the use of the spring can be checked, and the service life of the spring can be visually judged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wrapping film processing, in particular to a wrapping film tensioning device. BACKGROUND

[0002] In industrial production, the winding process of the wrapping film body after production is crucial, and the wrapping film tensioning device is the key equipment to ensure the winding quality. At present, the common wrapping film tensioning device on the market has many deficiencies; On the one hand, many traditional tensioning devices lack effective dynamic tension adjustment mechanism. In the winding process, as the diameter of the film roll increases, the tension of the film body will change, and the traditional device is difficult to sense and automatically adjust the tension in real time, resulting in unstable tension of the film body. If the tension is too small, the structure of the wound film roll will be loose, and the film roll will be prone to unrolling, deformation and other problems during subsequent transportation and storage; if the tension is too large, the film body may be stretched too much, resulting in stretching deformation or even breakage, affecting the use performance of the film body and reducing the product quality; On the other hand, the existing device cannot effectively check the use of the spring in the tension adjustment part, and the operator cannot intuitively judge the service life of the spring. When the spring is subject to elastic attenuation or fatigue damage due to long-term use, it cannot be replaced in time, which not only affects the stability of the film body tension, but also may cause equipment failure, increase maintenance cost and risk of production interruption. SUMMARY

[0003] The purpose of the present application is to solve the problems existing in the prior art, and to provide a wrapping film tensioning device. The device uses a spring structure in cooperation with a lifting mechanism during use, and through the use of an infrared range finder, the tension of the film body can be kept within an appropriate range, ensuring the winding effect. In addition, the use of the spring can be checked, and the service life can be intuitively judged.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme: The utility model provides a kind of winding film tensioner, including two installation strips, the lower end of two described installation strips is fixedly connected with support frame, the lower end of the support frame is installed with multiple bottom feet, two described guide rollers are rotatably connected between the two installation strips;Tension adjusting mechanism, the lower of the tension adjusting mechanism is provided with U-shaped plate, the inner wall of the two sides of the U-shaped plate is rotatably connected with adjusting roller, the film body is commonly arranged around the adjusting roller and two guide rollers, the upper end of the U-shaped plate is fixedly connected with two indicating rods, the upper end of each described indicating rod penetrates lift plate, and is fixedly connected with connecting strip, the lower end of each described connecting strip is fixedly connected with mounting rod, the lower end of each described mounting rod penetrates corresponding lift plate, and is slidably connected, spring is sleeved on each described mounting rod, and the upper and lower ends of each described spring are respectively in contact with connecting strip and lift plate;Lifting mechanism, the lifting mechanism is used to adjust the height of tension adjusting mechanism.

[0005] Preferably, the lifting mechanism includes two vertical plates, the lower end of two vertical plates is fixedly connected with the upper end of the corresponding mounting rod, the upper end of two vertical plates is fixedly connected with horizontal plate, the upper end of the lift plate is fixedly connected with two threaded barrels, the lower end of the horizontal plate is rotatably connected with two threaded rods, the lower end of two threaded rods extends into the threaded barrel, and is threadedly connected with the threaded inner wall of the threaded barrel, the upper end of two threaded rods penetrates the lift plate, and is drivingly connected by transmission member.

[0006] Preferably, the transmission member includes two synchronous pulleys, and the two synchronous pulleys are drivingly connected by synchronous belt.

[0007] Preferably, the upper end of the horizontal plate is fixedly connected with a connecting frame, a drive motor is installed on the connecting frame, and the output shaft of the drive motor is fixedly connected with the upper end of one of the threaded rods.

[0008] Preferably, guide grooves are formed in the two vertical plates, guide blocks are fixedly connected to the two ends of the lift plate, each guide block penetrates the corresponding guide groove and is slidably connected, and a limiting block is fixedly connected to the side of each guide block away from the lift plate.

[0009] Preferably, two infrared range finders are symmetrically installed on the upper end of the lift plate, and annular indicating grooves are formed in the two indicating rods.

[0010] Preferably, the lower end of one of the installation strips is fixedly connected with a mounting frame, a display control panel is installed on one side of the mounting frame, the display control panel is used to display the data of the infrared range finder, and the drive motor is started or stopped according to the data, so that the tension of the film body is within the appropriate range, and the drive motor is a servo motor that can change the rotation direction.

[0011] Preferably, the upper end of the lifting plate is symmetrically fixedly connected to two guide plates. Each guide plate has a rectangular groove running through it from front to back. Each rectangular groove has a sliding limiting plate running through it from front to back. Each limiting plate has a limiting strip fixedly connected to its front and rear sides. The distance between the left and right side walls of each limiting strip is greater than the distance between the left and right inner walls of the rectangular groove, so as to prevent the limiting plate from detaching from the rectangular groove.

[0012] Compared with the prior art, the beneficial effects of this invention are as follows: 1. During the film winding operation, the U-shaped plate moves up and down with the change of film tension, changing the spring compression amplitude. It can automatically adapt to the change of film tension without frequent manual intervention, ensuring the stability and continuity of the tensioning process.

[0013] 2. The display control panel accurately judges the membrane tension based on the data from the infrared rangefinder and controls the drive motor. By adjusting the height of the lifting plate, the spring compression amplitude is adjusted to keep the membrane tension within a suitable range and improve the quality of the wrapped film.

[0014] 3. When the spring needs to be replaced, there is no need to move the membrane. Simply move the U-shaped plate to its maximum height so that the lower end of the mounting rod is higher than the upper end of the lifting plate. The spring can then be easily removed and replaced, reducing maintenance difficulty and time costs.

[0015] 4. By observing the position of the annular indicator groove when there is no load, and in conjunction with the operation of the limit plate, observe the time it takes for the spring to return to its initial position to determine its lifespan. This method is simple and intuitive, and can detect spring aging problems in advance, avoiding the impact of spring failure on the operation of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a wrapping film tensioning device proposed in this invention; Figure 2 for Figure 1 Enlarged view of the upper half; Figure 3 for Figure 2 A magnified structural diagram at point A; Figure 4 Diagram showing the fit between the guide plate and the limiting plate; Figure 5 for Figure 2 A front view illustration.

[0017] In the diagram: 1. Support frame, 2. Base, 3. Mounting strip, 4. Guide roller, 5. Vertical plate, 6. Horizontal plate, 7. Membrane body, 8. Mounting frame, 9. Display control panel, 10. Connecting frame, 11. Drive motor, 12. Synchronous pulley, 13. Synchronous belt, 14. Lifting plate, 15. U-shaped plate, 16. Adjusting roller, 17. Guide groove, 18. Guide block, 19. Limiting block, 20. Threaded rod, 21. Threaded cylinder, 22. Indicator rod, 23. Connecting strip, 24. Mounting rod, 25. Spring, 26. Infrared rangefinder, 27. Annular indicator groove, 28. Guide plate, 29. Rectangular groove, 30. Limiting plate, 31. Limiting strip. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Reference Figures 1-5 A stretch film tensioning device includes two mounting strips 3, the lower ends of the two mounting strips 3 are fixedly connected to a support frame 1, the lower end of the support frame 1 is equipped with multiple feet 2, and the feet 2 can achieve a better support effect. Two guide rollers 4 are rotatably connected between the two mounting strips 3. As one embodiment of the present invention, a tension adjusting mechanism is also included. The tension adjusting mechanism includes a lifting plate 14, a U-shaped plate 15 disposed below the lifting plate 14, and adjusting rollers 16 rotatably connected between the inner walls of both sides of the U-shaped plate 15. A membrane 7 is wound around the adjusting rollers 16 and two guide rollers 4. Figure 1As shown, two indicator rods 22 are symmetrically fixedly connected to the upper end of the U-shaped plate 15. The upper end of each indicator rod 22 passes through the lifting plate 14 and is fixedly connected to a connecting strip 23. The lower end of each connecting strip 23 is fixedly connected to an installation rod 24. The lower end of each installation rod 24 passes through the corresponding lifting plate 14 and is slidably connected. Each installation rod 24 is fitted with a spring 25. The upper and lower ends of each spring 25 are in contact with the connecting strip 23 and the lifting plate 14, respectively. During the film winding operation, both springs 25 are in a compressed state. When the tension increases, the spring 25 is compressed more, and when the tension decreases, the spring 25 is compressed less. If it is necessary to make the spring 25 slide more smoothly, simply move the U-shaped plate 15 to its maximum height without transferring the film body 7. At this time, the indicator rods 22, connecting strips 23 and installation rods 24 all move upward. The lower end of the installation rod 24 is higher than the upper end of the lifting plate 14. At this time, the spring 25 can be removed and replaced with a new spring 25. As one embodiment of the present invention, a lifting mechanism is also included. The lifting mechanism is used to adjust the height of the tension adjustment mechanism. The lifting mechanism includes two vertical plates 5, each of which has a guide groove 17. Guide blocks 18 are fixedly connected to both ends of the lifting plate 14. Each guide block 18 passes through the corresponding guide groove 17 and is slidably connected. A limit block 19 is fixedly connected to the side of each guide block 18 away from the lifting plate 14. The lower ends of the two vertical plates 5 are fixedly connected to the upper ends of the corresponding mounting strips 3. A horizontal plate 6 is fixedly connected to the upper ends of the two vertical plates 5. Two threaded cylinders 21 are fixedly connected to the upper end of the lifting plate 14. Two threaded rods 20 are rotatably connected to the lower end of the horizontal plate 6. The lower ends of the two threaded rods 20 extend into the threaded cylinders 21 and are threadedly connected to the inner threaded wall of the threaded cylinders 21. The upper ends of the two threaded rods 20 pass through the lifting plate 14 and are connected by transmission components. In one embodiment of the present invention, the transmission component includes two synchronous pulleys 12, which are connected by a synchronous belt 13. A connecting frame 10 is fixedly connected to the upper end of the horizontal plate 6, and a drive motor 11 is mounted on the connecting frame 10. The output shaft of the drive motor 11 is fixedly connected to the upper end of one of the threaded rods 20. By starting the drive motor 11 in both directions, the transmission component, the threaded rod 20, and the threaded cylinder 21 can cooperate to realize the up-and-down movement of the lifting plate 14. Furthermore, this up-and-down movement can adjust the compression amplitude of the spring 25 when the tension is too high or too low, so as to ensure that the compression amplitude of the spring 25 is always within a suitable range, thereby ensuring that the tension is always within a suitable range.

[0021] In one embodiment of the present invention, two infrared rangefinders 26 are symmetrically mounted on the upper end of the lifting plate 14. Both indicator rods 22 are provided with annular indicator grooves 27. The lower end of one of the mounting strips 3 is fixedly connected to a mounting bracket 8. A display control panel 9 is mounted on one side of the mounting bracket 8. The display control panel 9 is used to display the data of the infrared rangefinders 26 and to start and stop the drive motor 11 according to the data, so that the tension of the membrane 7 is within a suitable range. The drive motor 11 is a servo motor that can change the rotation direction.

[0022] In one embodiment of the present invention, two guide plates 28 are symmetrically fixedly connected to the upper end of the lifting plate 14. Each guide plate 28 has a rectangular groove 29 extending from front to back. A slidable limiting plate 30 is provided in each rectangular groove 29. A limiting strip 31 is fixedly connected to the front and rear sides of each limiting plate 30. The distance between the left and right side walls of each limiting strip 31 is greater than the distance between the left and right inner walls of the rectangular groove 29, which is used to prevent the limiting plate 30 from detaching from the rectangular groove 29. When it is necessary to test the service life of the spring 25, simply observe the position of the annular indicator groove 27 under no load. If it is in the initial position, move the connecting strip 23 down until the spring 25 can no longer be compressed, and then move the limiting plate 30 backward. At this time, the lower end of the limiting plate 30 just contacts the upper end of the connecting strip 23. Then pull the limiting plate 30 forward and observe the time required for the spring 25 to return to the initial position to determine the service life.

[0023] In this invention, during film winding, the upper end of the U-shaped plate 15 is connected to the lifting plate 14 via an indicator rod 22, a connecting strip 23, and a mounting rod 24, and the spring 25 sleeved on the mounting rod 24 is in a compressed state. When the tension of the film body 7 increases, the pressure of the film body 7 on the adjusting roller 16 increases, pushing the U-shaped plate 15 downward, causing the spring 25 to compress more; when the tension of the film body 7 decreases, the elasticity of the spring 25 pushes the U-shaped plate 15 upward, and the compression of the spring 25 decreases. The control panel 9 determines the tension of the membrane 7 based on data measured by the infrared rangefinder 26. When the tension exceeds the appropriate range, it controls the start and stop of the drive motor 11, which acts as a servo motor and can change its rotation direction. This drives two threaded rods 20 to rotate synchronously through the transmission components, cooperating with the threaded cylinder 21 to achieve the up and down movement of the lifting plate 14. When the tension of the membrane 7 is too high or too low, the height of the lifting plate 14 is adjusted to adjust the compression amplitude of the spring 25 to ensure that the tension is within the appropriate range. This adjustment of the spring 25 compression amplitude keeps the tension of the membrane 7 within the appropriate range. When testing the service life of spring 25, first observe the position of the annular indicator groove 27 under no other load. If it is in the initial position, move the connecting bar 23 down until spring 25 cannot be compressed. Then, move the sliding limit plate 30 in the rectangular groove 29 of the upper guide plate 28 of the lifting plate 14 backward so that the lower end of the limit plate 30 just contacts the upper end of the connecting bar 23. Then, pull the limit plate 30 forward and observe the time required for spring 25 to return to the initial position. This will help determine the service life of spring 25. If spring 25 needs to be replaced, without moving the membrane 7, move the U-shaped plate 15 to its maximum height. At this time, the indicator rod 22, connecting strip 23 and mounting rod 24 will all move upward. The lower end of the mounting rod 24 will be higher than the upper end of the lifting plate 14, so spring 25 can be removed and replaced with a new spring 25.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0025] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A wrapping film tensioning device characterized by, The utility model relates to a kind of film tensioning device, including: Two installation bars (3), the lower end of two installation bars (3) is fixedly connected with support frame (1) in common, the lower end of support frame (1) is installed with multiple bottom foot (2), two installation bars (3) are rotatably connected with two guide rollers (4) between; Tension adjusting mechanism, the lower of the lifting plate (14) is provided with U-shaped plate (15), the two side inner walls of U-shaped plate (15) are rotatably connected with adjusting roller (16), the adjusting roller (16) is commonly arranged with film body (7) on two guide rollers (4), the upper end of U-shaped plate (15) is fixedly connected with two indicating rods (22) in symmetry, the upper end of each indicating rod (22) penetrates lifting plate (14), and fixedly connected with connecting strip (23), the lower end of each connecting strip (23) is fixedly connected with mounting rod (24), the lower end of each mounting rod (24) penetrates corresponding lifting plate (14) and is slidably connected, spring (25) is sleeved on each mounting rod (24), and the upper and lower ends of each spring (25) are in contact with connecting strip (23) and lifting plate (14) respectively; Lifting mechanism, the lifting mechanism is used for height adjustment of tension adjusting mechanism.

2. A film tensioning device according to claim 1, wherein The lifting mechanism includes two vertical boards (5), the lower end of two vertical boards (5) is fixedly connected with the upper end of corresponding installation bar (3), the upper end of two vertical boards (5) is fixedly connected with horizontal plate (6), the upper end of lifting plate (14) is fixedly connected with two threaded barrels (21), the lower end of horizontal plate (6) is rotatably connected with two threaded rods (20), the lower end of two threaded rods (20) extends into threaded barrel (21) and is threadedly connected with the threaded inner wall of threaded barrel (21), and the upper end of two threaded rods (20) penetrates lifting plate (14) and is drivingly connected by transmission member.

3. A film tensioning device according to claim 2, wherein, The transmission member includes two synchronous wheels (12), and two synchronous wheels (12) are drivingly connected by synchronous belt (13).

4. A film tensioning device according to claim 3, wherein The upper end of horizontal plate (6) is fixedly connected with connecting frame (10), driving motor (11) is installed on connecting frame (10), and the output shaft of driving motor (11) is fixedly connected with the upper end of one of threaded rods (20).

5. A film tensioning device according to claim 2, wherein Two vertical boards (5) are all provided with guide slot (17), the both ends of lifting plate (14) are fixedly connected with guide block (18), each guide block (18) penetrates corresponding guide slot (17) and is slidably connected, and the side, away from lifting plate (14), of each guide block (18) is fixedly connected with limit block (19).

6. A film tensioning device according to claim 4, wherein, The upper end of lifting plate (14) is symmetrically installed with two infrared range finders (26), and two indicating rods (22) are all provided with annular indicating slot (27).

7. A film tensioning device according to claim 6, wherein, One of the lower end of the installation strip (3) is fixedly connected with the mounting bracket (8), one side of the mounting bracket (8) is provided with a display control panel (9), the display control panel (9) is used for displaying the data of the infrared range finder (26), and the opening and closing of the driving motor (11) is driven according to the data, so that the tension of the film body (7) is in the appropriate range, the driving motor (11) is a servo motor which can change the rotating direction.

8. A film tensioning device according to claim 7, wherein, The upper end of the lifting plate (14) is fixedly connected with two guide plates (28) in a symmetrical manner, a rectangular groove (29) is arranged in a front-rear penetrating manner on each of the two guide plates (28), a limiting plate (30) which can slide forward and backward is arranged in a penetrating manner in each of the rectangular grooves (29), a limiting strip (31) is fixedly connected to the front and rear sides of each of the limiting plates (30), and the spacing between the left and right side walls of each of the limiting strips (31) is greater than the spacing between the left and right inner walls of the rectangular groove (29), so as to avoid the limiting plate (30) from being separated from the rectangular groove (29).

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