CN204473492U - Plug - Google Patents

Abstract

The utility model discloses a plug, which solves the problem that the winding mandrel is difficult to be installed on the plug. The key point of the technical solution is a plug, which includes a fixed pipe matched with the winding core pipe. The upper edge of the fixed pipe At least one protrusion is arranged in the circumferential direction, and each protrusion extends to the plug along the axial direction of the fixed pipe. The front end of the protrusion is circular, and the side wall of the protrusion is provided with rounded corners. The utility model has the advantage that the winding mandrel is fixed on the plug through the small front and large rear bumps, so that the installation of the plug and the winding mandrel is convenient, and the fixing effect is better at the same time.

Description

plug

technical field

The utility model relates to a plug.

Background technique

In the modern production process, various strip products such as films, tapes or papers are usually wound and stored by winding core tubes, which is convenient for the storage and transportation of films or papers. The core tube usually winds products such as film on the core tube for storage or transportation, but during the transportation process, the two ends of the product may be deformed or worn due to extrusion or friction.

In the prior art, the invention patent with application number 201120072750.1 protects the film by adding plugs at both ends of the core tube. The plug includes a fixed tube, which is inserted into the core tube to fix the core tube. , the fixed tube of the plug is provided with a bump that strengthens the fixing effect of the core tube. Although the bump can play a role in strengthening the fixation, the bump makes it difficult for the core tube to snap into the fixed tube during installation, causing installation the inconvenience.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of this utility model is to provide a plug that facilitates the installation of the winding mandrel.

In order to achieve the above object, the utility model provides the following technical solution: a plug, including a fixed tube matched with the winding core tube, the fixed tube is provided with at least one protrusion along the circumferential direction, each of the protrusions Extending along the axial direction of the fixed pipe to the plug, the front end of the protrusion is circular, and the side wall of the protrusion is provided with rounded corners.

Preferably, the section height of the projection along the direction of axial extension gradually increases.

Preferably, the radius of the rounded corner is the height of the section of the bump where the rounded corner is located.

As a preference, the number of bumps is 8.

Compared with the prior art, the utility model has the following advantages: when the winding mandrel is installed, the winding mandrel is smoothly installed on the plug through the small front and large rear bumps, so that the installation of the plug and the winding mandrel is convenient, At the same time, the fixing effect of the plug and the mandrel is better.

Description of drawings

Fig. 1 is a structural representation one of the utility model;

Fig. 2 is the structural representation two of the utility model;

Fig. 3 is a schematic sectional view one of the utility model;

Fig. 4 is the second schematic sectional view of the utility model;

Fig. 5 is a schematic sectional view three of the utility model.

In the figure: 1, plug; 11, fixed pipe; 12, bump; 121, front end; 2, roll mandrel;

Detailed ways

The utility model will be further described with reference to the accompanying drawings.

As shown in FIG. 1 , when the film is stored or transported, the film is generally wound on a winding mandrel 2 , and plugs 1 are respectively inserted at the left and right ends of the winding mandrel 2 .

As shown in Figure 2, the center of the plug 1 is provided with a fixed tube 11, and the outer diameter of the fixed tube 11 is slightly smaller than the inner diameter of the mandrel 2, so that the fixed tube 11 on the plug 1 can be inserted into the mandrel 2 conveniently. On the outer cylindrical surface of 11, several bumps 12 are evenly distributed along the circumference, and in this embodiment, the number of bumps 12 is preferably 8, that is, a bump 12 is arranged every 45 degrees. The distribution method makes when the fixing tube 11 is inserted into the winding core shaft 2, the force on the fixing tube 11 and the winding core tube is more uniform, and at the same time, it is not easy to shake.

As shown in Figure 3, the bump 12 extends to the plug 1 along the axial direction of the fixed pipe 11, the front end surface of the bump 12 is circular, and the circular front end 121 is circular, and the circular front end 121 The section radius is the distance from the upper end surface of the bump 12 to the fixed pipe 11, generally preferably 2 millimeters; Tube 11 distance.

When the plug 1 is inserted into the core tube, the inner wall of the end face of the core tube first makes point contact with the front end of the bump 12, and then the core tube is inserted into the fixed tube 11 along the arc of the fillet, avoiding the core The interference between the tube and the bump 12 when it is inserted, when the plug 1 is inserted into the core tube, compared with the prior art, the rounded corners of the bump 12 make the installation of the core tube and the plug 1 more convenient and secure Better results.

Further, as shown in FIG. 4 , the cross-sectional height of the bump 12 along the direction of axial extension continues to rise, that is, the cross-sectional shape of the bump 12 is triangular, and the front end of the bump 12 is circular and is in line with the outer wall of the fixed pipe 11. Fitting, the rear end of the bump 12 extends to the plug 1. When the plug 1 is inserted into the core tube, due to the large friction between the core tube and the fixed tube 11, it is easy to cause the core tube to be installed even though it has The main body is fixed, but the core tube and the fixed tube 11 are eccentric, and the bump 12 with a triangular cross-section plays a guiding role. When the core tube is installed into the fixed tube 11, the concentricity is continuously adjusted to make the core tube and the plug 1 The installation accuracy is higher and the fixing effect is better.

The above is only the preferred implementation of the utility model, and the scope of protection of the utility model is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the utility model belong to the scope of protection of the utility model. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims (4)

1. a plug, comprise the stationary pipes coordinated with core pipe, it is characterized in that: described stationary pipes is circumferentially provided with at least one projection, projection described in each axially extends to plug along stationary pipes, the leading section of described projection is circular, and the sidewall of described projection is provided with fillet.

2. plug according to claim 1, is characterized in that: the depth of section in the direction that described projection extends vertically raises gradually.

3. plug according to claim 1 and 2, is characterized in that: the height in radius projection cross section residing for fillet of described fillet.

4. plug according to claim 1 and 2, is characterized in that: the quantity of described projection is 8.