Reusable sleeve without winding core pipe

Abstract

The utility model relates to the technical field of plastic film packaging, and provides a reusable sleeve without a winding core pipe, which can be reused, reduces the waste of plastic films, is low in winding cost, and comprises a cylinder shaft shell which can rotate and is provided with a through groove on the surface, and an expansion air bag which is arranged in the cylinder shaft shell and is used for inflating and expanding, an expansion cavity used for containing the expansion air bag is formed between the air cylinder shaft shell and the expansion air bag, a plurality of outer ejector blocks which penetrate through the penetrating groove and are used for protruding out of the surface of the air cylinder shaft shell are arranged on the outer wall of the expansion air bag, and an inflation pipe and an exhaust pipe which are communicated with the expansion air bag are arranged on the outer wall of the expansion air bag. The outer wall of the air cylinder shaft shell is detachably sleeved with an elastic outer pipe made of viscous materials, after the expansion air bag is inflated and expanded, the outer ejection block is ejected outwards to protrude out of the surface of the air cylinder shaft shell, the elastic outer pipe is pushed outwards to expand and make contact with the conveyed plastic film to adhere the plastic film, and the plastic film is wound along with rotation of the air cylinder shaft shell.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film packaging, in particular to a reusable sleeve exempting from a winding core tube. Background Art

[0002] Plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. It can be used for packaging or as a coating layer. It is widely used in food, medicine, chemical and other fields. After the plastic film is produced and processed, in order to make it more convenient to transport, it needs to be rolled up. The rolling process usually starts with arranging a reel tube made of paper or other materials outside the cylinder shaft, and then pressurizing and inflating the cylinder shaft so that the convex blocks outside the cylinder shaft protrude outward and rest against the inner wall of the reel tube to fix the reel tube. At the same time, a layer of sticky glue is applied to the outside of the reel tube. At this time, one end of the plastic film can be brought into contact with the reel tube with the sticky glue so that the plastic film is adhered to the reel tube. Rotating the cylinder shaft can drive the reel tube to rotate at the same time to rewind the plastic film. After the rewinding is completed, the cylinder shaft is deflated so that the convex blocks on it no longer contact the inner wall of the reel tube. At this time, the reel tube can be removed to complete the rewinding of the plastic film.

[0003] Although the above-mentioned existing technology can solve the corresponding technical problems, it still has certain defects: although the existing winding core tube can be used with adhesive to firmly fix the plastic film, since it uses the adhesive film, after winding, the innermost layer of the plastic film will be in direct contact with the adhesive, resulting in the sticky adhesive adhering to the surface of the innermost layer of the plastic film and making it unusable and difficult to separate and recycle. At the same time, each time a roll of plastic film is wound, a winding core tube is required to be fixed on the innermost layer of the plastic film roll, and the winding core tube cannot be reused, which leads to waste of winding core tube materials and excessively high winding costs. Utility Model Content

[0004] The utility model aims to provide a reusable sleeve free of a winding core tube, which is reusable, reduces waste of plastic film and has low winding cost, in view of the defects and shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a reusable sleeve that does not require a winding core tube, comprising a rotatable cylinder shaft shell with a through groove on the surface and an inflation airbag arranged in the cylinder shaft shell for inflation, an inflation cavity for accommodating the inflation airbag is provided between the cylinder shaft shell and the inflation airbag, the outer wall of the inflation airbag is provided with a plurality of outer top blocks that penetrate the through groove and are used to protrude from the surface of the cylinder shaft shell, the outer wall of the inflation airbag is provided with an inflation tube and an exhaust tube that are connected to the inflation airbag, the outer wall of the cylinder shaft shell is detachably covered with an elastic outer tube made of a sticky material, after the inflation airbag is inflated, the outer top block is pushed outward to make the outer top block protrude from the surface of the cylinder shaft shell, and the elastic outer tube is pushed outward to expand the elastic outer tube and contact the delivered plastic film to adhere to it, and the plastic film is rolled up as the cylinder shaft shell rotates.

[0006] A further improvement is that both ends of the cylinder shaft housing are provided with rotating shafts for connecting to a rotating machine.

[0007] A further improvement is that: the cylinder shaft housing is provided with an inwardly sunken airflow groove connected to the end of the air filling pipe at a position corresponding to the air filling pipe.

[0008] A further improvement is that: the cylinder shaft housing is provided with an inwardly sunken airflow groove connected to the end of the exhaust pipe at a position corresponding to the exhaust pipe.

[0009] A further improvement is that the outer top block is a square sheet structure with a polished and rounded top.

[0010] A further improvement is that the outer wall of the elastic outer tube is provided with a plurality of friction grooves.

[0011] After adopting the above technical scheme, the beneficial effect of the utility model is as follows: when the utility model is used, the plastic film is directly contacted and adhered to the elastic outer tube made of sticky material, and the elastic outer tube is fixed by the outer top block and slightly deformed to increase the contact pressure on the plastic film, so that the plastic film can be rolled up and taken out from the plastic film for repeated use without gluing, thereby avoiding waste caused by direct contact between the plastic film and the sticky glue, and at the same time, there is no need to use a paper roll for rolling, thereby reducing the rolling cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a structural schematic diagram of the front cross section of the casing of the utility model;

[0014] Figure 2 It is a schematic structural diagram of a side cross-section of the casing of the utility model;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the elastic outer tube of the utility model. DETAILED DESCRIPTION

[0016] The utility model is now further described in conjunction with the accompanying drawings and specific embodiments.

[0017] See also Figure 1-3 As shown, the technical solution adopted in this specific embodiment is: a reusable sleeve exempting from a winding core tube, comprising a rotatable cylinder shaft housing 1 with a through groove on the surface and an inflation airbag 2 for inflation arranged in the cylinder shaft housing 1, an inflation cavity 3 for accommodating the inflation airbag 2 is provided between the cylinder shaft housing 1 and the inflation airbag 2, and the outer wall of the inflation airbag 2 is provided with a plurality of outer top blocks 4 penetrating the through groove and protruding from the surface of the cylinder shaft housing 1, and eighteen of them are provided in this embodiment, The outer wall of the inflatable airbag 2 is provided with an inflation tube 21 and an exhaust tube 22 which are connected to the inflatable airbag 2. The outer wall of the cylinder shaft housing 1 is detachably covered with an elastic outer tube 5 made of a viscous material. After the inflatable airbag 2 is inflated, the outer top block 4 is pushed outward to make the outer top block 4 protrude from the surface of the cylinder shaft housing 1, and the elastic outer tube 5 is pushed outward to make the elastic outer tube 5 expand and contact the delivered plastic film to adhere to it, and the plastic film is rolled up as the cylinder shaft housing 1 rotates. When in use, the elastic outer tube 5 is sleeved on the cylinder shaft housing 1, and the airbag 2 is inflated. The cylinder shaft housing 1 is installed on the external rotating member, and then the expansion airbag 2 is inflated through the inflation tube 21, so that the expansion airbag 2 expands in the expansion chamber 3 and pushes the outer push block 4 outward, so that the outer push block 4 protrudes from the surface of the cylinder shaft housing 1 and pushes on the elastic outer tube 5. At this time, the plastic film can be output, and the entire sleeve is rotated by the rotating member. After the plastic film contacts the elastic outer tube 5, the plastic film is attached to the surface of the elastic outer tube 5 by the viscosity of the elastic outer tube 5, and the plastic film is output as the elastic outer tube 5 rotates. The film is rolled up. After the plastic film is rolled up, the gas in the inflatable airbag 2 is released through the exhaust pipe 22, so that the inflatable airbag 2 drives the outer top block 4 to shrink, and then the elastic outer tube 5 shrinks at the same time, breaking away from the contact with the rolled plastic film, and then the plastic film is taken out. At this time, the innermost layer of the plastic film does not have a paper tube, and at the same time, the innermost plastic film will not be contaminated by the sticky glue. The sticky material used by the elastic outer tube 5 of this embodiment is preferably silicone, and can also be an elastic material with a certain stickiness on the surface similar to silicone;

[0018] The two ends of the cylinder shaft housing 1 are provided with a rotating shaft 11 for connecting to the rotating machine, which is conducive to more convenient connection and disassembly with the rotating mechanism, thereby reducing the time required for installation and disassembly;

[0019] The cylinder shaft housing 1 is provided with an inwardly sunken airflow groove 12 connected to the end of the air filling tube 21 at a position corresponding to the air filling tube 21, which is beneficial to prevent the elastic outer tube 5 from being pushed outward when the elastic outer tube 5 is long, so that it can maintain a relatively round shape;

[0020] The cylinder shaft housing 1 is provided with an inwardly sunken airflow groove 12 connected to the end of the exhaust pipe 22 at a position corresponding to the exhaust pipe 22, which is beneficial to prevent the elastic outer tube 5 from being pushed outward when the elastic outer tube 5 is long, so that it can maintain a relatively round shape;

[0021] The outer top block 4 is a square sheet structure with a polished and rounded top, which is beneficial to reduce damage to the inner wall of the elastic outer tube 5 during the outer top.

[0022] The outer wall of the elastic outer tube 5 is provided with a plurality of friction grooves, which are beneficial to improving the friction force on the surface of the elastic outer tube 5, thereby avoiding slipping during winding.

[0023] Working principle of the utility model: When the utility model is used, the elastic outer tube 5 is sleeved on the cylinder shaft housing 1, and the cylinder shaft housing 1 is installed on the external rotating member, and then the expansion airbag 2 is inflated through the inflation tube 21, so that the expansion airbag 2 is expanded in the expansion chamber 3, and the outer top block 4 is pushed outward, so that the outer top block 4 protrudes from the surface of the cylinder shaft housing 1 and pushes on the elastic outer tube 5, and the plastic film can be output at this time, and the entire sleeve is rotated by the rotating member at the same time, after the plastic film contacts the elastic outer tube 5 The plastic film is attached to the surface of the elastic outer tube 5 by the viscosity of the elastic outer tube 5, and the plastic film is rolled up as the elastic outer tube 5 rotates. After the plastic film is rolled up, the gas in the inflatable airbag 2 is released through the exhaust pipe 22, so that the inflatable airbag 2 drives the outer top block 4 to shrink, and then the elastic outer tube 5 shrinks at the same time, breaking away from the contact with the rolled plastic film, and then the plastic film is taken out. At this time, the innermost layer of the plastic film does not have a paper tube, and at the same time, the innermost layer of the plastic film will not be contaminated by the sticky glue.

[0024] The utility model is intended to protect the structure of the product. The model of each component is not the content of the utility model, and it is also a known technology. Any component on the market that can achieve the above functions of the utility model can be used as a choice. Therefore, the model and other parameters of the component are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of various components.

[0025] The above shows and describes the basic principle and main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. Anything not described in detail in the utility model is a well-known technology of those skilled in the art.

Claims

1. A reusable sleeve free of a winding core tube, comprising a rotatable cylinder shaft housing (1) provided with a through groove on its surface, and an inflation airbag (2) arranged in the cylinder shaft housing (1) for inflation, an inflation chamber (3) for accommodating the inflation airbag (2) is provided between the cylinder shaft housing (1) and the inflation airbag (2), a plurality of outer top blocks (4) penetrating the through groove and protruding from the surface of the cylinder shaft housing (1) are provided on the outer wall of the inflation airbag (2), an inflation tube (21) and an exhaust tube (22) connected to the inflation airbag (2) are provided on the outer wall of the inflation airbag (2), and the characteristics are as follows: The outer wall of the cylinder shaft housing (1) is detachably covered with an elastic outer tube (5) made of a sticky material. After the expansion airbag (2) is inflated, the outer push block (4) is pushed outward so that the outer push block (4) protrudes from the surface of the cylinder shaft housing (1), and the elastic outer tube (5) is pushed outward so that the elastic outer tube (5) expands and contacts the delivered plastic film to adhere to it, and the plastic film is rolled up as the cylinder shaft housing (1) rotates.

2. A reusable sleeve without a winding core tube according to claim 1, characterized in that: Both ends of the cylinder shaft housing (1) are provided with rotating shafts (11) for connecting to a rotating machine.

3. The reusable sleeve without a winding core tube according to claim 1, characterized in that: The cylinder shaft housing (1) is provided with an inwardly sunken airflow groove (12) at a position corresponding to the air charging pipe (21) and connected to the end of the air charging pipe (21).

4. The reusable sleeve without a winding core tube according to claim 1, characterized in that: The cylinder shaft housing (1) is provided with an inwardly sunken airflow groove (12) at a position corresponding to the exhaust pipe (22) and connected to the end of the exhaust pipe (22).

5. The reusable sleeve without a winding core tube according to claim 1, characterized in that: The outer top block (4) is a square sheet structure with a polished and rounded top.

6. The reusable sleeve without a winding core tube according to claim 1, characterized in that: The outer wall of the elastic outer tube (5) is provided with a plurality of friction grooves.

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