JPH0224760Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the structure of the body of a tube container, the body of which is formed by rolling up a laminated sheet made of synthetic resin.

[Conventional technology]

As a tube container, the body is molded using a laminated sheet with synthetic resin film laminated on both sides of aluminum foil, and its mechanical strength, ease of molding, and resistance to contents are excellent. It is used in many fields because it is easy to manufacture and can be manufactured at low cost.

That is, a strip-shaped laminated sheet in which synthetic resin coatings are laminated on both sides of aluminum foil is rolled up with both side edges of the laminated sheet overlapped, and the overlapping both side edges are heat welded to form the sheet shown in Figure 1. A body 1 is molded as shown in FIG. After filling the container body with the contents, the lower end of the body 1 is flattened and heat welded to form a sealing portion, thereby completing the formation of the tube container. In the tube container described above, the product name and decorative patterns are printed on the surface of the body 1 of the tube container, but when printing on the surface of the body 1, this printing is The circumference of the surface of the body 1 is determined taking into account the positional relationship with the overlapping both side ends of the laminated sheets constituting the body 1 described above, and the positional relationship with the seal portion that is flattened and molded. It is necessary to accurately set and position the positional relationship in terms of direction.

Conventionally, alignment along the circumferential direction of printing on the surface of the body 1 has been carried out by determining the position in the circumferential direction of the lower end of the outer circumferential surface of the body 1 in a positional relationship set with the overlapping portion of both ends of the laminated sheet described above. Print a registration mark on the body part 1 using this registration mark as a reference.
Printing was performed on the surface.

In addition, since both ends of the laminated sheet are simply overlapped to form the seal, the aluminum foil, which has poor content resistance, is exposed on the end surface of the laminated sheet located inside the seal. There were disadvantages in that the aluminum foil corroded and the contents deteriorated due to the aluminum foil.

As a solution to this inconvenience,
As shown in Japanese Patent No. 102040, a method has been proposed in which the edge of the laminated sheet located inside the seal portion is covered with an edge rib made of a synthetic resin material.

[The problem that the idea aims to solve]

The conventional technique disclosed in Japanese Utility Model Application Publication No. 102040/1984 does indeed have the effect of reliably preventing the aluminum foil from being exposed inside the tube body. The other disadvantages mentioned above in the tube body, namely the positioning of the seal part along the circumferential direction of the tube body,
There are problems in that the inconveniences such as the need to use registration marks that deteriorate the external appearance of the tube container and the difficulty in printing on the outer peripheral surface of the tube body have not been solved.

Therefore, the present invention was devised to solve the problems of the prior art described above, and is capable of printing on the surface of the body while maintaining accurate alignment without deteriorating the decorative effect of this printing. The purpose is to

[Means to solve the problem]

The means of the present invention to achieve the above object is to connect the mouth to the upper end of the cylindrical body via a truncated conical shoulder, and further flatten the lower end of the body. This relates to the structure of the body of a tube container made of synthetic resin, which is formed by heat welding and forming a seal part. It is composed of a tube body molded into a shape, and a synthetic resin surface coating formed on the outer peripheral surface of the tube body, and the sheet body constituting the tube body has at least an intermediate layer made of aluminum foil An inner layer made of synthetic resin is laminated on the inner surface, and an edge rib made of colored synthetic resin is attached to one side end of a color different from that of the inner layer covering the end face of this one side end. To form the tube body using this sheet body, the inner layer of the sheet body is positioned on the inside, rolled up, the edge ribs are placed on the inside, and both side ends are overlapped, and the overlapping both side ends are heat-welded. , It is in.

[Effect]

Since the edge ribs are molded with a colored synthetic resin that is a different color from the inner layer of the sheet body, the heat-welded portion of the inner circumferential surface of the body is different from the color of the entire inner surface of the tube body where the inner layer appears. A vertical strip of the same color as the different edge ribs is formed, which extends from the open bottom opening of the body of the shaped tube body.
Can be clearly and easily seen.

In this way, the vertical stripes, which are clearly and easily visible from the outside due to the different colors, are located overlapping the heat-welded parts of the tube body, so it is easy to locate the vertical strips along the circumferential direction of the body. By achieving this, accurate positioning along the circumferential direction of the heat-welded portion of the tube body can be clearly and easily achieved. To detect this vertical stripe, the conventional position detection mechanism for detecting registration marks can be used almost as is.

In addition, the outer circumferential surface of the body is formed by a surface coating that is laminated onto the outer circumferential surface of the tube body, which is formed by rolling up sheet bodies, overlapping both ends of the sheets, and heat-welding them. The stepped portion of the heat-welded portion formed on the outer circumferential surface of the body is filled and smoothed by this surface coating, and as a result, the outer circumferential surface of the body becomes an extremely smooth surface.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In the illustrated embodiment, the sheet body 4 has an inner layer 6 made of synthetic resin on the inner surface of an intermediate layer 5 made of aluminum foil.
In addition, an outer layer 7 made of synthetic resin is laminated and molded on the outer surface of the intermediate layer 5 to form a three-layer structure.

In this way, by forming the sheet body 4 into a three-layer structure, it is possible to increase the welding strength at the heat-welded portion when the sheet body 4 is rolled up and formed into the tube body 9, and it is also possible to The adhesion of the surface coating 11 can be made stronger.

The coating lamination assembly of the surface coating 11 onto the outer peripheral surface of the tube body 9 may be achieved by any suitable method, but in order to achieve stronger adhesion of the surface coating 11 to the outer peripheral surface of the tube body 9, In order to make the outer circumferential surface of the surface coating 11 fixed to the outer circumferential surface of the tube body 9 smoother, the surface coating 11 is formed directly on the outer circumferential surface of the tube body 9 by extrusion lamination. is good. Moreover, this surface coating 11 has high weather resistance,
Needless to say, it is molded from a synthetic resin material that is water resistant, abrasion resistant, and has a good feel, but it also has excellent printing properties in order to better achieve decoration by printing on the surface of the tube container body. It is desirable to use a synthetic resin material.

Positioning of the tube container main body in the circumferential direction using the longitudinal stripes 10 formed on the inner circumferential surface of the body 1 is performed by rotating the tube container main body in the state shown in FIG. 1 and using a conventional position detection mechanism. This is achieved by detecting the vertical stripes 10.

Note that the outer layer 7 is also formed on the other side end of the sheet body 4.
When the edge ribs are shaped to have the same color, the stepped portion formed on the outer circumferential surface of the heat welded portion of the tube body 9 formed by overlapping both ends of the sheet body 4 will be formed at this end. Because it is filled with part ribs,
The outer circumferential surface of the tube body 9 can be made relatively smooth, thereby making it possible to make the outer circumferential surface of the body 1 formed by the surface coating 11 even smoother.

[Effect of idea]

Since the present invention has the above-described configuration, it has the following effects.

Vertical stripes are formed on the inner circumferential surface of the trunk, making it easy to identify them by different colors. By detecting these vertical stripes, the circumferential position of the trunk can be easily determined. There is no need to print registration marks for positioning in the circumferential direction on the surface, and a dedicated printing process for printing registration marks can be eliminated, thereby simplifying the process of forming the tube container body. Moreover, since printing equipment for printing registration marks is not required, equipment costs can be significantly reduced, and furthermore, deterioration of the external appearance of tube containers due to registration marks can be completely eliminated.

Since the body is formed by laminating a surface coating on the outer circumferential surface of the tube body, which is formed by rolling a sheet, the outer surface of the body can be made into a smoother surface, which improves the appearance. Not only can a good tube container be obtained, but also decorative printing can be achieved well, and the outer surface of the tube container can be molded by freely selecting a synthetic resin material that exhibits physical properties desirable for the tube container. .

Forming the longitudinal strips is easy because it does not require a dedicated, separate forming process and can be formed using conventional forming processes for forming tube containers.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a tube container body showing an embodiment of the present invention, viewed from slightly below. FIG. 2 is a partially enlarged plan sectional view showing the process of forming the tube body constituting the body shown in the embodiment shown in FIG. FIG. 3 is a plan cross-sectional view of the body of the embodiment shown in FIG. 1. Explanation of the symbols: 1; Body part; 2; Shoulder part; 3; Mouth part; 4; Sheet body; 5; Intermediate layer; 6; Inner layer; 7;
Outer layer, 8; Edge rib, 9; Tube body, 10;
Vertical stripes, 11; surface coating.

Claims (1)

[Scope of utility model registration request] A mouth tube part is connected to the upper end of a cylindrical body via a truncated conical shoulder, and the lower end of the body is flattened and heat welded to form a seal part. The body of a tube container made of synthetic resin, which is made of aluminum foil, and an inner layer made of synthetic resin is laminated on at least the inner surface of the middle layer made of aluminum foil, and one side end is covered with the end surface of the one side end. A belt-shaped sheet body having edge ribs made of colored synthetic resin of a different color from the inner layer is rolled up with the inner layer positioned inside, and both ends are overlapped with the edge ribs inside. A body of a tube container made of synthetic resin, comprising a tube body formed into a cylindrical shape by heat welding, and a surface coating made of synthetic resin laminated to cover the outer peripheral surface of the tube body.