JPS636020Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is suitable for containers for fruit containers, instant food containers, frozen desserts such as ice cream and sherbet, cold beverages such as juice and cola, and hot beverage containers such as coffee and tea, especially synthetic resin containers. Regarding a double container made by combining an inner container and an outer container made of a molded body with a space between them, both the inner and outer containers can be firmly connected with good integrity by the fitting structure, and the wall thickness of both containers can be This design was devised to provide sufficient shape-retaining strength without increasing the thickness of the container. A protrusion is provided, and one of the opening end of the inner container and the opening end of the outer container is provided with an extending fitting flange that fits substantially flush with the upper end surface of the other. It is something to do.

Next, embodiments of the present invention will be described based on the drawings.
In the embodiment shown in FIGS. 1 to 3, the reference numeral 10 indicates an inner container made of a synthetic resin molded body having a substantially hollow hemispherical shape with an upward opening, and 20 a substantially hollow container corresponding to the inner container 10 and having a slightly larger radius. It is an outer container made of a synthetic resin molded body having a hemispherical shape and a bottom portion 21 which is recessed in a planar shape. There is. The inner container 10 and the outer container 20 are combined so as to have a required space 30 between them to form a double-structured container. In particular, the inner and outer containers 1
0 and 20 are connected to each other by a fitting structure at the bottom and the open end.

Therefore, as a fitting structure at the bottoms of the inner and outer containers 10 and 20, the outer surface of the bottom 11 of the inner container 10 and the outer surface of the outer container 2
Fitting protrusions 1 each have an annular shape centered on the container axis and fit into each other on the inner surface of the bottom part 21 of 0.
3 and 23 project perpendicularly to the horizontal bottom surface, and in the case shown, the fitting protrusion 23 of the outer container bottom 21 is fitted inside the fitting protrusion 13 of the inner container bottom 11. Both fitting protrusions 13 and 23 can also be formed so that they fit in the opposite direction. In either case, it is desirable that the two fitting protrusions 13, 23 are press-fitted relatively firmly like an interference fit. In particular, on the fitting surface of one of the fitting protrusions, for example, on the inner circumferential surface of the outer fitting protrusion 13 as shown in FIG. A large number of protrusions 12 are provided at required intervals in the circumferential direction, and the small protrusions 12 are inserted and fitted into the other fitting protrusion 23 to ensure a strong fit and facilitate the fitting operation. Both fitting protrusions 13,
23 may be provided with an engaging means for preventing slippage, such as a circumferential protrusion. Furthermore, a slight gap is provided between the tip end surface of both fitting protrusions 13 or 23 and the other bottom part 21 or 11, and the inner container 1 when the stored item is hot.
It is designed to allow zero thermal expansion and to be able to fit in place even if dust adheres to the tip surface. Note that the fitting protrusions between the inner container bottom 11 and the outer container bottom 21 are not limited to those having an annular shape centered on the axis of the container as in the illustrated embodiment; The inner and outer containers 10,
It is possible to implement various structures that can be fitted with a space 30 between the bottom parts 11 and 21 of 20,
Similarly to the above, it is desirable to have a strong pressure fit such as an interference fit.

Further, as a fitting structure at the open ends of the inner and outer containers 10 and 20, the upper end surface is fitted to the open end 14 of the inner container 10 and to the inner side of the open end 24 of the outer container 20 so as to be substantially flush with each other. A fitting flange 15 extends, and in the case shown in the figure, the fitting flange 15 includes a horizontal portion 15a extending outward from the upper end of the side portion and a drooping portion 15b extending downwardly from the edge of the horizontal portion 15a. It has a substantially hook-shaped cross section, which increases the contact area with the open end 24 of the outer container 20 and improves shape retention. It is preferable that the fitting flange 15 is formed so as to tightly fit tightly against the open end 24 of the outer container 20 such as an interference fit.
The opening end 2 is formed by fitting the fitting flange 15 immediately after molding and before cooling or in a state where it has been softened by heating.
Although it is possible to achieve a tight fit by reducing the diameter of the material 4 as it cools, the elasticity of the material is usually utilized to elastically push the material into a tight fit. In addition to this, by providing engagement convex portions formed by corresponding undercuts on the opposing fitting surfaces of the two, and allowing the two to fit in an engaged state, the bonding force due to the fitting can be further increased. . Furthermore, reinforcing ribs 16 in the radial direction are arranged at required intervals in the circumferential direction at the lower part of the fitting flange 15 having a substantially hook-shaped cross section, and the lower edge thereof is connected to the hanging part 15b.
It is formed in an inclined shape that gradually lowers inward from the lower end, and restricts the bending deformation of the hanging portion 15b to maintain the above-mentioned fitted state well.
20 can be easily aligned during the fitting operation. Also, the open end 24 of the outer container 20
On the inner periphery, there is a convex portion 25 that engages with the lower end of the outer periphery of the fitting flange 15 at a position below the upper end by a dimension corresponding to the width in the vertical direction of the hanging portion 15b, which is the outer periphery of the fitting flange 15. are provided at required intervals in the circumferential direction, and the fitting flange 15 that fits inside the opening end 24 is connected to the convex portion 2.
5, it can be supported and positioned. Note that the outer container 20 is provided with air holes 28 at required locations on the side and/or bottom.
It is desirable to allow air to be discharged between the two in the case of a combination of 0 and 20, and to allow expansion air due to hot contents to escape.

In the case of the above embodiment, the inner container 10 is fitted into the outer container 20 formed separately, and the fitting protrusions 13 and 23 of both are fitted to each other at the bottom of the outer container 20, and the inner container 10 is fitted into the outer container 20. The fitting flange 15 at the open end 14 is connected to the open end 24 of the outer container 20.
A double-structured container can be constructed by simply fitting the inner periphery.

Further, in the embodiments shown in FIGS. 5 to 7, the container sides 17, 27 of the inner and outer containers 10, 20
shows the case of a cup-shaped double container with a tapered shape that increases in diameter toward the top, and similarly to the above-described embodiment, the outer surface of the bottom 11 of the inner container 10 and the inner surface of the bottom 21 of the outer container 20 are mutually opposite to each other. Further, the open end 14 of the inner container 10 has a substantially hook-shaped cross section with a horizontal portion 15a and a hanging portion 15b extending from the edge of the outer container 20. A fitting flange 15 that fits into the inner periphery of the opening end 24 of
are extended, and the inner and outer containers 10, 20 are connected to the fitting protrusion 1.
3 and 23 and the fitting flange edge 15, the bottom portion and the opening end portion are fitted and connected. In this embodiment, especially the open end 24 of the outer container 20
The inner circumferential surface of the lower side portion 27 is bent so as to form a steep slope close to perpendicular to the inner circumferential surface of the lower side portion 27 to reduce the taper, so that the fitting flange edge 15 that fits thereon does not easily come off. ing. Of course, they may be fitted in an engaged state as in the above embodiment. Also in this case, a slight convex portion 25 is formed on the inner periphery of the opening end portion 24 with which the lower end of the fitting flange 15 that fits into the portion engages.
It is desirable to provide the inner and outer containers 10, especially the inner and outer containers 10,
20 can be easily fitted and held flush with the upper end surface. The upper end surfaces of the inner and outer containers 10, 20 do not necessarily have to be flush, but it is best to make them flush as described above, which gives a good appearance as a double container and also allows the lid to be sealed on the upper end surface of the container. suitable. Note that other structures such as the fitting protrusions 10, 20 and the fitting flange 15 are the same as those in the above-described embodiment, and a reinforcing rib 16 in the radial direction is provided at the lower part of the fitting flange 15. Further, the outer container 20 is provided with an air hole 28, and the bottom 21 is recessed with a peripheral edge 22 remaining.

In any of the above embodiments, the inner container 1
Although a case is shown in which the fitting flange 15 extended to the open end 15 of the outer container 20 is fitted to the inner periphery of the open end 24 of the outer container 20, the fitting flange 15 having a substantially hook-shaped cross section is shown.
The hanging portion 15b of No. 5 may be fitted to the outer periphery of the open end 24 of the outer container 20, and in this case, a cutout step portion into which the hanging portion 15b fits is provided on the outer periphery of the open end 24. It is desirable to prevent the fitting flange edge from protruding outward. Also, contrary to the above,
It is also possible to provide the opening end 24 of the outer container 20 with a fitting flange that fits around the outer periphery of the opening end 14 of the inner container 10.

Note that various synthetic resins can be used as the material for the inner container 10 and outer container 20, but in addition to keeping both the inner and outer containers 10 and 20 colorless and transparent, both may be colored in any color, or one It is also possible to color one and make the other transparent or translucent.

The present invention is a double container in which an inner container 10 and an outer container 20, which are formed separately as described above, are combined with a space 30 between them. It can be suitably used as a container for cold and hot food such as bowls, a container for instant food eaten by pouring boiling water, or a container for frozen desserts such as ice cream, cold drinks such as juice, and hot drinks such as coffee.

Therefore, in the present invention, the fitting protrusions 13 and 23 that fit into the bottoms of the inner container 10 and the outer container 20,
In addition, one opening end is provided with a fitting flange 15 that fits into the other opening end, and the inner and outer containers 10, 2
0 are connected at both the bottom and the opening end by the fitting structure of the fitting protrusions 13 and 23 and the fitting flange 15. It is firmly connected with no fear of separation, and has an extremely good integrity. Moreover, in the lower part of this double container, the fitting protrusion 1 on the bottom part
3 and 23, and the fitting structure and the fitting structure by the fitting flange 15 at the opening end are reinforced and shaped.
It retains its shape due to its own rib effect. In particular, radial reinforcing ribs are provided at required intervals in the circumferential direction at the lower part of the fitting flange, which prevents bending deformation of the fitting flange itself and, by extension, deformation of the opening end. This can be effectively prevented, the above-mentioned fitted state can be maintained even better, and there is no possibility that gaps or distortions will occur in the fitted portions of the inner and outer containers. Therefore, even if the wall thickness of the inner and outer containers 10, 20 is not increased so much, there is no risk of bending or deformation, the overall shape-retaining strength is sufficient, and there is no fear that the distance between the inner and outer containers 10, 20 will change. . Particularly, since the fitting at the bottom is done by the fitting protrusion from the bottom, there is no effect on the retention of the air hole 30 at the bottom, and the device can be used stably for a long period of time. Furthermore, even if the upper end surface of the container does not have an edge protruding outward from the container, one fitting flange edge at the opening end of the inner and outer containers fits approximately flush with the other at the upper end surface, and thereby It has a sufficient width and a flat surface at the top of the opening end, making it easy to use and looks good, and is also suitable for sealing paper or synthetic resin lids for containers for instant foods, etc. It is also convenient.

Furthermore, the container of the present invention has an inner container 10 and an outer container 2.
0 and 0 respectively and fitting them at the bottom and the open end allows for a combined structure and easy manufacturing.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, and Fig. 1 is a plan view, Fig. 2 is a vertical front view of the same, Fig. 3 is an enlarged view of a part of the front view, and Fig. 4 is a view along the line taken from the front view. 5 is a plan view showing another embodiment, FIG. 6 is a longitudinal sectional front view of the same, and FIG. 7 is an enlarged view of a part of the previous figure. 10... Inner container, 11... Bottom, 13... Fitting protrusion, 14... Opening end, 15... Fitting flange, 2
0... Outer container, 21... Bottom, 23... Fitting protrusion, 24... Open end, 30... Empty.

Claims (1)

[Scope of utility model registration request] It is a container with a double structure consisting of an inner container and an outer container made of a synthetic resin molded body combined with a space between them, and the outer surface of the bottom of the inner container and the inner surface of the bottom of the outer container are fitted together. A mating protrusion is provided to fit the inner container and the outer container, and a mating flange is provided extending from one opening end of the inner container and the outer container to fit substantially flush with the other opening end at the upper end surface. A double container characterized in that radial reinforcing ribs are arranged at required intervals in the circumferential direction at the lower part of the joint rim.