JPH0349748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cylindrical container. For more details,
The present invention relates to a cylindrical container that is held and handled on a daily basis and is used to take out the powder or liquid contents sealed therein as appropriate, and is particularly concerned with cylindrical containers that are required to be pressure resistant.

[Prior Art] Some conventional cylindrical containers have a main body made of metal or synthetic resin.

[Problems to be Solved by the Invention] The metal cylindrical container has high rigidity and excellent pressure resistance, especially at high temperatures, but has problems in that it has poor corrosion resistance and moldability, and lacks transparency. On the other hand, cylindrical containers made of synthetic resin have excellent corrosion resistance, moldability, and transparency, but have a problem of poor pressure resistance.

As mentioned above, metal cylindrical containers and synthetic resin cylindrical containers each have advantages and disadvantages, and cylindrical containers that are superior in pressure resistance, corrosion resistance, moldability, and transparency It doesn't exist yet.

In view of the above circumstances, an object of the present invention is to provide a cylindrical container that has excellent pressure resistance, corrosion resistance, and moldability, and also has transparency that allows the inside to be seen from the outside.

[Means for Solving the Problems] The cylindrical container of the present invention comprises an inner cylinder made of a translucent synthetic resin material and having a bottomed cylindrical head having a head for attaching a stopper to the upper end; It consists of a bottomed cylindrical outer shell made of a metal material that is fitted around the outer periphery of the shoulder, body, and bottom of the inner cylinder, and a viewing window is formed in a certain range extending above and below the outer shell. It is characterized by

[Function] In the cylindrical container of the present invention, sufficient pressure resistance can be obtained due to the outer shell made of a highly rigid metal material. Furthermore, the inner cylinder made of synthetic resin provides corrosion resistance.

Since the rigidity of the entire cylindrical container can be shared by both the outer shell and the inner cylinder, the thickness of the metal outer shell can be reduced. Therefore, the moldability of molding the container shape is improved.

Furthermore, since a viewing window is provided in the outer shell, it is possible to see through the interior through the transparent synthetic resin inner tube.

[Example] Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a longitudinal cross-sectional view of a cylindrical container A according to a first embodiment of the present invention, FIG. 2 is an enlarged view of the X section in FIG. 1, and FIGS. FIG. 5 is a longitudinal sectional view of a cylindrical container B according to a second embodiment of the present invention.

In FIG. 1, A indicates the cylindrical container of the first embodiment, 1 is an outer shell, 2 is an inner cylinder, 3 is a stopper, and 4 is a viewing window.

The main body of this cylindrical container A as a whole is composed of an outer shell 1 and an inner cylinder 2, and a stopper 3 is attached to the opening of the head at the upper end of the inner cylinder 2. In addition, stopper 3
The push button 31, the valve body 32, and the bottom tube 3
It consists of a known aerosol valve with 3.

The outer shell 1 is made of a highly rigid metal material. Suitable metal shell materials include steel and aluminum, which have been widely used in the past. The metal outer shell 1 is formed into the neck, body, and bottom of the cylindrical container by, for example, press working. At this time, several elongated holes constituting the viewing window 4 are formed along the longitudinal direction around the body.

The inner cylinder 2 is made of synthetic resin material. Synthetic resin materials include polyethylene, polypropylene,
Polyacetal, nylon, polyethylene terephthalate, polyvinyl chloride, polyvinylidene chloride, etc., and laminated films thereof are preferably used. The inner cylinder 2 is formed by blow molding within the outer shell 1 so that it fits inside the outer shell 1. When formed in this manner, the inner tube 2 bulges out at the viewing window 4 portion to form a fitting portion 5, as shown in FIG. Therefore, the outer shell 1 and the inner cylinder 2 are firmly connected to each other so that they do not shift.

Since the cylindrical container of this embodiment is constructed as described above, sufficient pressure resistance can be obtained by the metal outer shell 1. Furthermore, by appropriately selecting the synthetic resin that is the material for the inner cylinder 2, corrosion resistance can be achieved.

Since the rigidity of the entire cylindrical container A is shared by the two-layer structure of the outer shell 1 and the inner cylinder 2, the wall thickness of the outer shell 1 can be made thinner than a container made only of metal.
Therefore, the outer shell 1 can be easily molded, and in addition to having a circular cross section, it is possible to easily adopt shapes such as a rectangular shape as shown in FIG. 3 and an elliptical shape as shown in FIG. 4.

Furthermore, the inner tube 2 is made of a synthetic resin material that is translucent, that is, transparent or translucent, or a synthetic resin material that allows the contents inside to appear as shadows when viewed through light. Therefore, since the inside can be seen through the viewing window 4, it becomes easy to check the remaining amount.

Next, the cylindrical container B of the second embodiment will be explained. The cylindrical container B of this embodiment uses an ordinary cap type stopper and is suitable for a relatively small container. The outer shell 1 and the inner cylinder 2 are formed from the materials shown in the first embodiment using the same processing method.

In this embodiment, a plurality of elliptical viewing windows 4 are provided throughout the container. Further, a fitting part 5 for firmly connecting the outer shell 1 and the inner cylinder 2 is provided on the bottom surface of the cylindrical container B.

In this embodiment, similarly to the first embodiment,
Sufficient pressure resistance and corrosion resistance can be obtained. Furthermore, since it is also easy to mold, it is also possible to make a container with a modified cross section as shown in FIGS. 3 and 4. Furthermore, as in the first embodiment, the inside can be seen through the viewing window 4.

[Effects of the Invention] Since the cylindrical container of the present invention has excellent pressure resistance and corrosion resistance, it can be used for a wider range of uses than conventional containers. Furthermore, it is possible to provide a container that is convenient to handle by taking advantage of its moldability and transparency.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of a cylindrical container A according to a first embodiment of the present invention, FIG. 2 is an enlarged view of the X section in FIG. 1, and FIGS. FIG. 5 is a longitudinal sectional view of a cylindrical container B according to a second embodiment of the present invention. Main symbols in the drawing: 1: outer shell, 2: inner cylinder, 4: viewing window, 5: fitting part.

Claims (1)

[Scope of Claims] 1. A bottomed cylindrical inner cylinder made of a translucent synthetic resin material and having a head for attaching a stopper to the upper end; and a shoulder, body and bottom of the inner cylinder. A cylindrical container comprising a bottomed cylindrical outer shell made of a metal material fitted around the outer periphery, and a viewing window is formed in a certain range extending above and below the outer shell. 2. The cylindrical container according to claim 1, wherein the inner cylinder has a fitting portion that bulges into a viewing window formed in the outer shell.