Telescopic winding film winding drum

Abstract

The utility model discloses a telescopic winding film winding cylinder, including telescopic first cylinder and second cylinder, the one end of first cylinder can be detached and is inserted to the one end in second cylinder, the outer peripheral side wall of the one end of first cylinder is protruding with a plurality of contact convex parts, and a plurality of contact convex parts are set gradually interval along the axial direction of first cylinder, and the contact convex part extends along the circumferential direction of first cylinder, along with the insertion of first cylinder relative to second cylinder, and the contact convex part rubs and contacts the inner peripheral side wall of second cylinder, by this, it can be applicable to the winding film of different width, and the applicability has been improved.

Description

Technical Field

[0001] This utility model relates to the field of film winding equipment, and in particular to a telescopic film winding cylinder. Background Technology

[0002] With the continuous development of society and economy and the continuous improvement of people's living standards, more and more tools are being manufactured and widely used in agriculture, industry and service industries. Tools come in a wide variety of types, and have been further innovated according to different needs, playing an indispensable role in people's work and life, and providing convenience for their work and life.

[0003] In the product manufacturing process, packaging is usually involved. In the existing technology, wrapping equipment is generally used to wrap the product with film. The wrapping equipment is equipped with a wrapper for fixing the film tube. This wrapper is generally a fixed tube structure. When in use, the film tube is installed on the fixed tube and then the item is wrapped. This type of wrapper is generally a single straight tube. Its length cannot be adjusted after it is manufactured. It can only be used for film tubes of a specific width, which means it cannot be used for film tubes of different widths.

[0004] Therefore, a new technology needs to be developed to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a telescopic wrapping film cylinder that can be applied to wrapping films of different widths, thereby improving its applicability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A telescopic wrapping film cylinder includes a first cylinder and a second cylinder that are telescopically connected; one end of the first cylinder can be detachably inserted into one end of the second cylinder; a plurality of contact protrusions are provided on the outer peripheral sidewall of one end of the first cylinder, the plurality of contact protrusions are arranged sequentially at intervals along the axial direction of the first cylinder, and the contact protrusions extend along the circumferential direction of the first cylinder; as the first cylinder is inserted relative to the second cylinder, the contact protrusions rub against the inner peripheral sidewall of the second cylinder.

[0008] As a preferred embodiment, several of the contact protrusions are arranged at uniform intervals along the axial direction of the first cylinder.

[0009] As a preferred embodiment, the contact protrusion includes a plurality of protrusions, which are arranged at intervals along the circumferential direction of the first cylinder.

[0010] As a preferred embodiment, the side of the protrusion away from the outer peripheral wall of the first cylinder is provided with a contact surface, which is used to contact the inner peripheral wall of the second cylinder.

[0011] As a preferred embodiment, a plurality of first through grooves are provided on the outer peripheral sidewall of the first cylinder, and the plurality of first through grooves are arranged at intervals along the axial direction of the first cylinder, and the first through grooves penetrate the inner and outer sides of the first cylinder.

[0012] As a preferred embodiment, a plurality of second through grooves are provided on the outer peripheral sidewall of the second cylinder, and the plurality of second through grooves are arranged sequentially at intervals along the axial direction of the second cylinder, and the second through grooves penetrate the inner and outer sides of the second cylinder.

[0013] As a preferred embodiment, a trumpet-shaped first guide cavity is formed at the other end of the first cylinder.

[0014] As a preferred embodiment, a trumpet-shaped second guide cavity is formed inside the other end of the second cylinder.

[0015] As a preferred embodiment, the other end of the first cylinder is provided with a first annular stop, and the other end of the second cylinder is provided with a second annular stop.

[0016] As a preferred embodiment, a plurality of arc-shaped limiting protrusions are provided on the inner circumferential sidewall of one end of the second cylinder. The plurality of arc-shaped limiting protrusions are located on one side near the opening of the second cylinder facing the first cylinder. The plurality of arc-shaped limiting protrusions are arranged sequentially at intervals along the axial direction of the second cylinder. The arc-shaped limiting protrusions extend along the circumferential direction of the second cylinder, and a limiting groove is formed between two adjacent arc-shaped limiting protrusions. As the first cylinder is inserted relative to the second cylinder, the corresponding contact protrusion is located in the corresponding limiting groove.

[0017] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly comprises a first cylinder and a second cylinder that are telescopically connected, allowing one end of the first cylinder to be detachably inserted into one end of the second cylinder. Thus, by adjusting the insertion depth of the first cylinder into the second cylinder, the length of the entire winding cylinder can be changed to accommodate winding films of different widths, thereby improving applicability. Furthermore, by providing several contact protrusions on the outer peripheral sidewall of one end of the first cylinder, after the first cylinder is inserted into the second cylinder, it can rub against the inner peripheral sidewall of the second cylinder through the multiple contact protrusions, thereby effectively increasing the friction between the first and second cylinders, enhancing the stability of the connection between the first and second cylinders, making it less likely for the first and second cylinders to slide relative to each other, ensuring that the insertion depth of the first cylinder into the second cylinder is not easily changed, and that the first cylinder can be well fixed on the second cylinder, thereby ensuring smooth operation of the winding process and bringing convenience to production.

[0018] To more clearly illustrate the structural features, technical means, and specific objectives and functions of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of this utility model;

[0020] Figure 2 This is a schematic plan view of the overall structure of an embodiment of this utility model;

[0021] Figure 3 This is another planar schematic diagram of the overall structure of an embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional schematic diagram of an embodiment of the present utility model;

[0023] Figure 5 This is another cross-sectional schematic diagram of an embodiment of the present utility model;

[0024] Figure 6 This is an exploded view of an embodiment of the present utility model;

[0025] Figure 7 This is another exploded view of an embodiment of the present invention.

[0026] Explanation of reference numerals in the attached diagram:

[0027] 10. First cylinder body; 11. Contact protrusion

[0028] 111, protrusion; 12, first annular stop.

[0029] 13. First oblique protrusion; 131. First oblique surface

[0030] 132. Second inclined plane; 133. First arc surface

[0031] 14. First through slot; 15. First guide cavity

[0032] 20. Second cylinder body; 21. Second annular stop section

[0033] 22. Second oblique protrusion; 221. Third oblique surface

[0034] 222, Fourth inclined plane; 223, Second arc surface

[0035] 23. Arc-shaped limiting protrusion 24. Limiting groove

[0036] 25. Second through slot; 26. Second guide cavity. Detailed Implementation

[0037] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", and "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0038] Please refer to Figures 1 to 7 As shown, it illustrates the specific structure of the boneless winding film winding tube provided in the embodiment of the present invention. It is mainly used in boneless (i.e., paperless) winding film, but is not limited to the application of boneless winding film.

[0039] The boneless wrapping film wrapping cylinder includes a telescopically connected first cylinder 10 and second cylinder 20; both the first cylinder 10 and the second cylinder 20 are hollow straight cylinders, and both the first cylinder 10 and the second cylinder 20 are made of plastic; one end of the first cylinder 10 can be detachably inserted into one end of the second cylinder 20, so that the length of the entire wrapping cylinder can be changed by adjusting the insertion amount of the first cylinder 10 into the second cylinder 20 to suit wrapping films of different widths.

[0040] A plurality of contact protrusions 11 are provided on the outer peripheral sidewall of one end of the first cylinder 10. The plurality of contact protrusions 11 are arranged at intervals along the axial direction of the first cylinder 10 and extend along the circumferential direction of the first cylinder 10. As the first cylinder 10 is inserted relative to the second cylinder 20, the contact protrusions 11 rub against the inner peripheral sidewall of the second cylinder 20. In this way, by setting the contact protrusions 11, after the first cylinder 10 is inserted into the second cylinder 20, it can rub against the inner peripheral sidewall of the second cylinder 20 through the multiple contact protrusions 11, thereby effectively increasing the friction between the first cylinder 10 and the second cylinder 20, enhancing the stability of the connection between the first cylinder 10 and the second cylinder 20, making it less likely for the first cylinder 10 and the second cylinder 20 to slide relative to each other, so as to ensure that the insertion amount of the first cylinder 10 into the second cylinder 20 is not easily changed, and the first cylinder 10 can be well fixed on the second cylinder 20, thereby ensuring the smooth operation of the winding operation and bringing convenience to production.

[0041] Preferably, a plurality of contact protrusions 11 are arranged at uniform intervals along the axial direction of the first cylinder 10, so that the insertion depth of the first cylinder 10 into the second cylinder 20 can be accurately determined based on the number of contact protrusions 11 inserted into the second cylinder 20. In this embodiment, the contact protrusion 11 includes a plurality of protrusions 111, and a contact surface is provided on the side of the protrusion 111 away from the outer peripheral sidewall of the first cylinder 10. The contact surface is used to contact the inner peripheral sidewall of the second cylinder 20. The plurality of protrusions 111 are arranged at uniform intervals along the circumferential direction of the first cylinder 10, so that the frictional contact between each protrusion 111 of the contact protrusion 11 and the inner peripheral sidewall of the second cylinder 20 is more uniform. In addition, the plurality of protrusions 111 of the plurality of contact protrusions 11 are arranged in a matrix, which not only makes the appearance more aesthetically pleasing, but also makes the frictional contact between the first cylinder 10 and the inner peripheral sidewall of the second cylinder 20 more uniform in both the axial and circumferential directions, and is more conducive to molding and manufacturing.

[0042] Preferably, in this embodiment, the minimum outer diameter of the first cylinder 10 is smaller than the inner diameter of the second cylinder 20, and the maximum outer diameter of the first cylinder 10 at the contact protrusion 11 is larger than the inner diameter of the second cylinder 20. Thus, when the first cylinder 10 is inserted into or pulled out of the second cylinder 20, since both the first cylinder 10 and the second cylinder 20 are made of plastic and have a certain elastic deformation, the contact protrusion 11 can squeeze the inner peripheral sidewall of the second cylinder 20. Under the compression of the contact protrusion 11, the inner peripheral sidewall of the second cylinder 20 elastically deforms, allowing the first cylinder 10 to be smoothly inserted and pulled out. When the first cylinder 10 is inserted or pulled out a certain amount and stops being inserted or pulled out, the inner peripheral sidewall of the second cylinder 20 can recover a certain deformation and squeeze the contact protrusion 11 to make contact, so that the first cylinder 10 is well fixed on the second cylinder 20.

[0043] A plurality of first through grooves 14 are provided on the outer peripheral sidewall of the first cylinder 10. The plurality of first through grooves 14 are arranged at uniform intervals along the axial direction of the first cylinder 10. The first through grooves 14 penetrate the inner and outer sides of the first cylinder 10. The first through grooves 14 are symmetrically arranged on two opposite sides of the outer peripheral sidewall of the first cylinder 10. By providing the first through grooves 14, the amount of material used in the first cylinder 10 can be reduced and the weight of the first cylinder 10 can be reduced. Four contact protrusions 11 are arranged between two adjacent first through grooves 14 in the axial direction of the first cylinder 10 so that the first through grooves 14 are arranged at equal intervals. Some protrusions 111 surround the corresponding first through grooves 14.

[0044] The outer peripheral sidewall of the second cylinder 20 is provided with a plurality of second through grooves 25. The plurality of second through grooves 25 are arranged at uniform intervals along the axial direction of the second cylinder 20. The second through grooves 25 penetrate the inner and outer sides of the second cylinder 20. The second through grooves 25 are symmetrically arranged on two pairs of sides of the outer peripheral sidewall of the second cylinder 20. The second through grooves 25 are corresponding to the corresponding first through grooves 14. By providing the second through grooves 25, the amount of material used in the second cylinder 20 can be reduced and the weight of the second cylinder 20 can be reduced.

[0045] A trumpet-shaped first guide cavity 15 is formed inside the other end of the first cylinder 10. The first guide cavity 15 gradually decreases in size from left to right, and its axis coincides with the axis of the inner cavity of the first cylinder 10. A trumpet-shaped second guide cavity 26 is formed inside the other end of the second cylinder 20. The second guide cavity 26 gradually decreases in size from right to left, and its axis coincides with the axis of the inner cavity of the second cylinder 20. Through the combined design of the first guide cavity 15 and the second guide cavity 26, the insertion of the external tubular structure into the first cylinder 10 and the second cylinder 20 can be smoother. When the first cylinder 10 is inserted into the second cylinder 20, the axes of the first guide cavity 15 and the second guide cavity 26 coincide. In addition, the cross-section of the inner peripheral sidewall at the opening of the first guide cavity 15 and the second guide cavity 26 is arc-shaped, which is more conducive to the introduction of the external tubular structure.

[0046] The inner circumferential sidewall of one end of the second cylinder 20 is provided with a plurality of arc-shaped limiting protrusions 23. The plurality of arc-shaped limiting protrusions 23 are located on one side near the opening of the second cylinder 20 facing the first cylinder 10. The plurality of arc-shaped limiting protrusions 23 are arranged at intervals along the axial direction of the second cylinder 20. The arc-shaped limiting protrusions 23 extend along the circumferential direction of the second cylinder 20, and a limiting groove 24 is formed between two adjacent arc-shaped limiting protrusions 23. As the first cylinder 10 is inserted relative to the second cylinder 20, the corresponding contact protrusion 11 is located in the corresponding limiting groove 24. Through the mutual limiting between the arc-shaped limiting protrusions 23 and the contact protrusions 11, the stability of the connection between the first cylinder 10 and the second cylinder 20 is further enhanced, so that the first cylinder 10 and the second cylinder 20 are not easy to slide relative to each other. This ensures that the insertion amount of the first cylinder 10 into the second cylinder 20 is not easily changed, and the first cylinder 10 can be well fixed on the second cylinder 20.

[0047] Preferably, a plurality of arc-shaped limiting protrusions 23 are symmetrically arranged on two opposite sides of the inner peripheral sidewall at one end of the second cylinder 20. This allows the contact protrusions 11 on two opposite sides of the outer peripheral sidewall of the first cylinder 10 to be simultaneously limited, which is more conducive to the stable connection between the first cylinder 10 and the second cylinder 20.

[0048] The other end of the first cylinder 10 integrally extends outward with a first annular stop portion 12. On the outer peripheral sidewall of the other end of the first cylinder 10, near the first annular stop portion 12, a plurality of first oblique protrusions 13 are provided. These first oblique protrusions 13 are arranged at intervals along the circumferential direction of the first cylinder 10. The first oblique protrusions 13 extend along the axial direction of the first cylinder 10 and gradually decrease in size towards the second cylinder 20. The other end of the second cylinder 20 integrally extends outward with a second annular stop portion 21. On the outer peripheral sidewall of the other end of the second cylinder 20, near the second annular stop portion 21, a plurality of second oblique protrusions 22 are provided. These second oblique protrusions 22 are arranged at intervals along the circumferential direction of the second cylinder 20. The second cylinder 20 extends axially and gradually decreases in size towards the first cylinder 10. Thus, the combined design of the first oblique protrusion 13 and the second oblique protrusion 22 allows for the stable fixing of stretch film rolls of different diameters at different positions on the oblique protrusions, making it suitable for stretch film rolls of different diameters. Furthermore, the oblique protrusions effectively increase the friction between the stretch film roll and the first cylinder 10 and the second cylinder 20, enhancing the stability of the connection between the stretch film roll and the first cylinder 10 and the second cylinder 20. This prevents the stretch film roll from slipping relative to the first cylinder 10 and the second cylinder 20, ensuring the stretch film roll is well fixed on the first cylinder 10 and the second cylinder 20, thereby guaranteeing smooth operation of the stretching process and bringing convenience to production.

[0049] One end of the first oblique protrusion 13 extends integrally to the side of the first annular stop portion 12 facing the second cylinder 20. A first oblique surface 131 and a second oblique surface 132 are provided on the side of the first oblique protrusion 13 away from the outer peripheral wall of the first cylinder 10, and the first oblique surface 131 and the second oblique surface 132 are sequentially arranged facing the second cylinder 20. One end of the second oblique protrusion 22 extends integrally to the side of the second annular stop portion 21 facing the first cylinder 10. A third oblique surface 221 and a second oblique surface 222 are provided on the side of the second oblique protrusion 22 away from the outer peripheral wall of the second cylinder 20. Four inclined surfaces 222, the third inclined surface 221 and the fourth inclined surface 222 are arranged sequentially facing the first cylinder 10; the angle between the first inclined surface 131 and the axis of the first cylinder 10 is greater than the angle between the second inclined surface 132 and the axis of the first cylinder 10, and the angle between the third inclined surface 221 and the axis of the second cylinder 20 is greater than the angle between the fourth inclined surface 222 and the axis of the second cylinder 20. In this way, it can realize a segmented adaptation design, so that when adapting to stretch film rolls of different diameters, the adaptation position of stretch film rolls of different diameters can be clearly distinguished.

[0050] The first inclined surface 131 and the second inclined surface 132 are connected by a first arc surface 133, and the third inclined surface 221 and the fourth inclined surface 222 are connected by a second arc surface 223, so as to achieve a smooth transition between the first inclined surface 131 and the second inclined surface 132, and between the third inclined surface 221 and the fourth inclined surface 222.

[0051] In this embodiment, five first through slots 14 are provided. The leftmost first through slot 14 is located near the side of the first oblique protrusion 13 away from the first annular stop portion 12, and no protrusions 111 are provided on the left side of the leftmost first through slot 14 or on both sides along the circumferential direction of the first cylinder 10. Correspondingly, five second through slots 25 are provided. The rightmost second through slot 25 is located near the side of the second oblique protrusion 22 away from the second annular stop portion 21.

[0052] In summary, the key design feature of this utility model lies in its inclusion of a telescopically connected first and second cylinders. One end of the first cylinder can be detachably inserted into one end of the second cylinder. This allows adjustment of the insertion depth of the first cylinder into the second cylinder, altering the overall length of the winding cylinder to accommodate winding films of varying widths, thus enhancing its applicability. Furthermore, the presence of several contact protrusions on the outer peripheral wall of one end of the first cylinder ensures that, after insertion, the first cylinder rubs against the inner peripheral wall of the second cylinder. This effectively increases the friction between the first and second cylinders, strengthening the connection and preventing relative slippage. This ensures that adjusting the insertion depth of the first cylinder into the second cylinder does not cause significant shifts, effectively securing the first cylinder to the second cylinder and guaranteeing smooth winding operations, thereby facilitating production.

[0053] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A telescopic stretch film winding cylinder, characterized in that: The device includes a first cylinder and a second cylinder that are telescopically connected; one end of the first cylinder can be detachably inserted into one end of the second cylinder; a plurality of contact protrusions are provided on the outer peripheral sidewall of one end of the first cylinder, the plurality of contact protrusions are arranged sequentially at intervals along the axial direction of the first cylinder, and the contact protrusions extend along the circumferential direction of the first cylinder; as the first cylinder is inserted relative to the second cylinder, the contact protrusions rub against the inner peripheral sidewall of the second cylinder.

2. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: Several of the contact protrusions are arranged at uniform intervals along the axial direction of the first cylinder.

3. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: The contact protrusion includes several protrusions, which are arranged at intervals along the circumferential direction of the first cylinder.

4. The telescopic wrapping film winding cylinder according to claim 3, characterized in that: The protrusion has a contact surface on the side away from the outer peripheral wall of the first cylinder, and the contact surface is used to contact the inner peripheral wall of the second cylinder.

5. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: The outer peripheral sidewall of the first cylinder is provided with a plurality of first through grooves, which are arranged at intervals along the axial direction of the first cylinder and penetrate the inner and outer sides of the first cylinder.

6. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: The outer peripheral sidewall of the second cylinder is provided with a plurality of second through grooves, which are arranged at intervals along the axial direction of the second cylinder and penetrate the inner and outer sides of the second cylinder.

7. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: A trumpet-shaped first guide cavity is formed inside the other end of the first cylinder.

8. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: A trumpet-shaped second guide cavity is formed inside the other end of the second cylinder.

9. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: The first cylinder has a first annular stop at one end, and the second cylinder has a second annular stop at the other end.

10. The telescopic wrapping film winding cylinder according to claim 1, characterized in that: The inner circumferential sidewall of one end of the second cylinder is provided with a plurality of arc-shaped limiting protrusions. The plurality of arc-shaped limiting protrusions are located on one side near the opening of the second cylinder facing the first cylinder. The plurality of arc-shaped limiting protrusions are arranged sequentially at intervals along the axial direction of the second cylinder. The arc-shaped limiting protrusions extend along the circumferential direction of the second cylinder, and a limiting groove is formed between two adjacent arc-shaped limiting protrusions. As the first cylinder is inserted relative to the second cylinder, the corresponding contact protrusion is located in the corresponding limiting groove.

Images