Tensioning structure of film winding charging barrel

Abstract

The utility model discloses a film winding charging barrel tensioning structure which comprises two sets of limiting assemblies which are symmetrically arranged up and down, and a charging barrel is located between the limiting assemblies. The limiting assembly comprises a flange plate and a mounting plate; an internal pressing structure and an external pressing structure are arranged between the flange plate and the mounting plate; according to the utility model, the inside and the outside of the charging barrel can be simultaneously pressed and fixed through the internal pressing structure and the external pressing structure, so that when the friction force of the external pressing structure is reduced due to long-time stress, dust entering or other factors, the internal pressing structure can still play a role in stable supporting, and the film winding operation is prevented from being influenced.

Description

Technical Field

[0001] This utility model relates to the field of packaging materials technology, specifically to a film winding cylinder tensioning structure. Background Technology

[0002] Film wrapping machines, also known as packaging machines, are categorized into pallet-type wrapping machines, pressure-type stretch wrapping machines, and pre-stretch automatic film wrapping machines to meet the packaging requirements of containerized storage, transportation, and mechanized loading and unloading operations. These machines are technologically advanced and widely used in export trade, food and beverage production, canning, papermaking, dyeing, and other industries to reduce packaging costs, improve production efficiency, prevent damage to goods during handling, and provide dustproof, moisture-proof, and hygienic protection.

[0003] The film is wrapped around the outside of the barrel and released to the outside of the item to be packaged through the barrel and the power component. In practical applications, the barrel and the machine body are detachable, which facilitates the replacement of the barrel and the film. In the prior art, the upper and lower ends of the barrel are usually rigidly clamped and fixed by mechanical claws. However, under long-term use, the centrifugal force and circumferential force on the barrel driven by the power component will gradually reduce the friction at the clamping point, which can easily cause loosening. There is room for improvement. Utility Model Content

[0004] This invention aims to solve the aforementioned technical problem that, under the drive of the power component, the centrifugal force and circumferential force borne by the barrel will gradually reduce the friction at the pressing point, easily causing loosening. It provides a film-wound barrel tensioning structure.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a film winding cylinder tensioning structure, comprising two sets of limiting components arranged symmetrically at the top and bottom, with the cylinder located between the limiting components; the limiting components include a flange and a mounting plate; an internal pressing structure and an external pressing structure are provided between the flange and the mounting plate;

[0006] The internal clamping structure includes a base on the mounting plate. The base is a hollow columnar structure with a motor inside. The output end of the motor has a rotating rod, and the rotating rod extends out of the base and has a gear. Symmetrical slide bars are slidably arranged on the base. The opposite sides of the slide bars are provided with toothed grooves that can cooperate with the gears. The ends of the slide bars that are far apart from each other are provided with arc-shaped plates. The outer side of each arc-shaped plate is provided with anti-slip pads, and the anti-slip pads are in contact with the inner side of the material cylinder.

[0007] The external clamping structure includes a threaded post between the flange and the mounting plate. A nut ring is threadedly connected to the outside of the threaded post, and an adjusting ring is rotatably provided on the outside of the nut ring. Several L-arms are hinged to the outside of the adjusting ring. The ends of the L-arms extend out of the mounting plate and are provided with arc-shaped extrusion parts. Anti-slip pads are provided on the opposite sides of the extrusion parts, and the anti-slip pads are in contact with the outer side of the barrel.

[0008] Furthermore, the flange is provided with several assembly holes, and is connected to the external machine body through the assembly holes.

[0009] Furthermore, the maximum outer diameter of the base is smaller than the inner diameter of the feed cylinder, allowing the feed cylinder to extend.

[0010] Furthermore, all the sliders are L-shaped, and each slider has a slider underneath. The base has a limiting groove that can slide and connect with the slider. The longitudinal section of both the slider and the limiting groove is T-shaped.

[0011] Furthermore, the mounting plate is provided with a rectangular through slot capable of accommodating an L-arm.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] The internal and external clamping structures can simultaneously clamp and fix the material inside and outside the barrel. Therefore, when the friction of the external clamping structure decreases due to prolonged stress, dust ingress, or other factors, the internal clamping structure can still provide stable support, thus avoiding affecting the film winding operation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the limiting component structure of this utility model.

[0016] Figure 3 This is a longitudinal sectional view of the base of this utility model.

[0017] Figure 4 This is a schematic diagram of the external clamping structure of this utility model.

[0018] Figure 5 This is a utility model Figure 2 Enlarged view of point A in the middle.

[0019] As shown in the figure: 1. Limiting component, 2. Barrel, 3. Flange, 4. Mounting plate, 5. Base, 6. Gear, 7. Sliding bar, 8. Limiting groove, 9. Arc plate, 10. Threaded column, 11. Nut ring, 12. Adjusting ring, 13. L-arm, 14. Extrusion part, 15. Through groove. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Example 1, in conjunction with Appendix Figure 1 A film winding cylinder tensioning structure includes two sets of limiting components 1 arranged symmetrically at the top and bottom, with the cylinder 2 located between the limiting components 1; the limiting components 1 include a flange 3 and a mounting plate 4, the flange 3 is provided with a number of assembly holes, and is connected to an external machine body through the assembly holes, thereby indirectly driving the cylinder 2 to rotate through the power component of the external film winding machine body;

[0022] An internal clamping structure and an external clamping structure are provided between the flange 3 and the mounting plate 4; clamping and fixing are performed simultaneously inside and outside the material cylinder 2.

[0023] Combined with appendix Figure 1 , 2 3, 5, The internal pressing structure includes a base 5 on the mounting plate 4. The maximum outer diameter of the base 5 is smaller than the inner diameter of the material cylinder 2, allowing it to extend into the material cylinder 2 for easy operation inside the material cylinder 2. The base 5 is a hollow columnar structure with a motor inside. The motor output end has a rotating rod, and the rotating rod extends out of the base 5 to have a gear 6. The gear 6 can rotate under the action of the motor. A slow-speed motor can be used to avoid excessive speed causing damage due to squeezing with the material cylinder 2.

[0024] Symmetrical slide bars 7 are slidably mounted on the base 5. The opposite sides of the slide bars 7 are provided with toothed grooves that can cooperate with the gear 6. The ends of the slide bars 7 that are far apart from each other are provided with arc-shaped plates 9. The outer side of the arc-shaped plates 9 is provided with anti-slip pads, and the anti-slip pads are in contact with the inner side of the material cylinder 2. Thus, the gear 6 drives the slide bars 7 to move, pushing the arc-shaped plates 9 at both ends in opposite directions until the anti-slip pads are pressed and contacted with the inner side of the material cylinder 2, forming a limit.

[0025] In the above structure, all sliders 7 are L-shaped, and each slider 7 has a slider underneath. The base 5 is provided with a limiting groove 8 that can slide and connect with the slider. The longitudinal section of both the slider and the limiting groove 8 is T-shaped, which can limit the slider 7 so that it can only move and not come out.

[0026] Combined with appendix Figure 1 , 24. The external clamping structure includes a threaded post 10 between the flange 3 and the mounting plate 4. A nut ring 11 is threadedly connected to the outside of the threaded post 10. An adjusting ring 12 is rotatably provided on the outside of the nut ring 11, so that rotating the nut ring 11 will drive the adjusting ring 12 to move up and down. Several L-arms 13 are hinged on the outside of the adjusting ring 12. The ends of the L-arms 13 extend out of the mounting plate 4 and are provided with arc-shaped extrusion parts 14. The mounting plate 4 is provided with rectangular through grooves 15 that can accommodate the L-arms 13. Anti-slip pads are provided on the opposite sides of the extrusion parts 14, and the anti-slip pads are in contact with the outer side of the barrel 2. Under the combined action of the adjusting ring 12 and the through grooves 15, the extrusion parts 14 will gradually adhere to and extrude the outer side of the barrel 2.

[0027] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A film winding bobbin tensioning structure, characterized by: Including two groups of limiting components (1) arranged symmetrically up and down, the material cylinder (2) is located between the limiting components (1); The limiting component (1) comprises a flange plate (3) and a mounting plate (4), and an internal compression structure and an external compression structure are arranged between the flange plate (3) and the mounting plate (4); The internal compression structure comprises a base (5) arranged on the mounting plate (4), the base (5) is a hollow columnar structure, and a motor is arranged in the base (5), a rotating rod is arranged at the output end of the motor, and a gear (6) is arranged on the rotating rod extending out of the base (5); Symmetrical slide bars (7) are slidably arranged on the base (5), the opposite sides of the slide bars (7) are provided with tooth-shaped grooves capable of cooperating with the gear (6), and arc-shaped plates (9) are arranged at the ends of the slide bars (7) away from each other, and anti-skid pads are arranged on the outer sides of the arc-shaped plates (9) and contact the inner sides of the material cylinder (2); The external compression structure comprises a threaded column (10) arranged between the flange plate (3) and the mounting plate (4), a nut ring (11) is threadedly connected to the outer side of the threaded column (10), and an adjusting ring (12) is rotatably arranged on the outer side of the nut ring (11); A plurality of L-shaped arms (13) are hingedly arranged on the outer side of the adjusting ring (12), and arc-shaped extrusion pieces (14) are arranged at the ends of the L-shaped arms (13) extending out of the mounting plate (4), and anti-skid pads two are arranged on the opposite sides of the extrusion pieces (14) and contact the outer sides of the material cylinder (2).

2. The film winding bobbin tensioning structure according to claim 1, characterized in that: A plurality of assembly holes are arranged on the flange plate (3) and connected with an external machine body through the assembly holes.

3. The film winding bobbin tensioning structure according to claim 1, characterized in that: The maximum outer diameter of the base (5) is smaller than the inner diameter of the material cylinder (2), and the base (5) can extend into the material cylinder (2).

4. The film winding bobbin tensioning structure according to claim 1, characterized in that: The slide bars (7) are L-shaped, and the slide bars (7) are provided with sliding blocks on the lower surfaces, the base (5) is provided with limiting grooves (8) capable of slidably connecting with the sliding blocks, and the longitudinal sections of the sliding blocks and the limiting grooves (8) are T-shaped.

5. The film winding bobbin tensioning structure according to claim 1, wherein: The mounting plate (4) is provided with a rectangular through groove (15) capable of accommodating the L-shaped arms (13).

Images