JPH0338089Y2 - - Google Patents

Description

[Detailed description of the invention] The invention relates to an insulated container, and more specifically, it can be used for instant noodles, miso soup, etc.
Concerning double-insulated containers that are difficult to transfer heat from inside.

It has been conventional practice to create a heat insulating container by providing a space in the side wall of the container with two inner and outer containers. Methods for fixing the inner and outer containers to each other include, for example, curling the upper end openings of the inner and outer containers together, and using adhesive, but each method requires special equipment.

An object of the present invention is to provide a double container in which the inner and outer containers can be easily fixed by simply pushing the inner container into the outer container without requiring a complicated device to fix the inner and outer containers.

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

FIG. 1 is an end view of the double container according to the present invention, and the inner container 1 is made of plastic such as polystyrene, polyvinyl chloride, polyethylene terephthalate, polyethylene, polypropylene, etc., and is formed by vacuum forming, pressure forming, injection molding, etc. It is formed by a method such as molding, and a groove 3 is formed surrounding the outer side wall of the inner container 1 immediately below the flange 7 . As shown in FIG. 2A, this groove 3 has a rectangular shape recessed from the side wall, and has a lower surface 5 that is substantially perpendicular to the side wall and a side surface 6 that is substantially parallel to the side wall. It is equipped with

On the other hand, the outer container 2 is made of paper or paper coated with plastic such as polyethylene on one or both sides, and the upper end of the opening of the outer container 2 has a convex portion formed by curling the upper edge of the opening inward. 4 is surrounded. The thickness of the convex portion 4 is greater than the depth of the groove 3, as shown in FIG. 2A.

In order to fix the inner container 1 and the outer container 2 described above to each other, it is sufficient to push the inner container 1 into the outer container 2, and just by doing this, the protrusion 4 fits into the groove 3. Then both are fixed. In this case, since the thickness of the protrusion 4 formed at the upper end of the opening of the outer container 2 is larger than the depth of the groove 3 formed in the side wall of the inner container 1, there is a gap between the inner container 1 and the outer container 2. is formed, and this portion exhibits a heat insulating effect. The two containers once fitted and fixed in this way can be easily separated even if the force P that tries to separate the outer container 2 from the inner container 1 acts as shown by the arrow in Figure 2 A. Never. In other words, the convex portion 4 that receives the force P hits the lower surface 5 of the concave groove 3 and tries to become flat, but since the depth of the concave groove 3 is limited, the convex portion 4 is flattened at one point in FIG. As shown by the chain line, the outer container 2 does not become flat, but the side surface 6 of the groove 3 comes into contact with it and generates a frictional force to prevent the outer container 2 from coming off as shown in FIG. 2C.

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

(1) Just by pushing the inner container into the outer container, the concave groove of the inner container and the convex part of the outer container fit together, and the inner and outer containers are firmly fixed and do not easily come off.

(2) After filling the contents, the inner container can be pushed into the outer container.
It is also possible to fix the inner and outer containers after sealing and performing retort processing.

(3) Since the outer container is made of paper, beautiful printing can be applied to it.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a vertical end view, and FIGS. 2A, 2B, and 2C are enlarged partially cutaway end views for explaining the fitted state. 1...Inner container, 2...Outer container, 3...Concave groove, 4
... Convex portion, 5 ... Bottom surface of groove 3, 6 ... Side surface of groove 3, 7 ... Flange.

Claims (1)

[Scope of utility model registration request] Consisting of an inner container 1 made of plastic and an outer container 2 made of paper or a laminate of paper and plastic, the inner container 1 has a rectangular groove on the outside of the side wall just below the flange 7. 3 is surrounded by
At the upper end of the opening of the outer container 2, a protrusion 4 is formed surrounding the upper end of the opening, and the protrusion 4 is curled inside the upper edge of the opening and has a thickness larger than the depth of the groove 3. A double container formed by fitting the inner container 1 and the outer container 2 together to form a gap between the inner container 1 and the outer container 2.