JP2005143630A - Double container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fit and tightly adhere an inner container made of glass and an outer container made of a hard resin without breaking them. <P>SOLUTION: In a double container, the outer side of a blind cylindrical inner container 1 is covered with the outer container 2 through a heat insulating space 6, a projected line 4 is provided on one of the upper part of the inner container 1 and the upper part of the outer container 2, a recessed groove 5 is provided on the other, and the upper parts of the inner container 1 and the outer container 2 are tightly adhered along a peripheral direction by fitting the projected line 4 and the recessed groove 5. Glass is used for the material of the inner container 1 and a resin having both of hardness for maintaining a container shape and flexibility at the time of fitting is used for the material of the outer container 2. The inner container 1 is forcibly fed to the outer container 2 at a temperature at which heat contraction is possible, the upper end part of the glass inner container 1 is projected above the outer container 2 and turned to a mouth part 3, and the projected line 4 and the recessed groove are tightly adhered by utilizing the heat contraction. The projected line 4 is provided on the inner container 1 made of the glass and the recessed groove 5 is provided on the outer container 2 made of the resin respectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bottomed cylindrical double container for making ice confectionery such as ice cream or sherbet or for keeping a beverage typified by beer cold.

As a conventional double container, both the inner container and the outer container are made of hard resin, and the inner container and the outer container are brought into close contact with each other by fitting the ring-shaped irregularities on the upper part of the inner container and the outer container. What seals the heat insulation space formed between the outer container and the outer container is known (Patent Document 1). Incidentally, it is important to ensure the sealing degree of the double container because the heat retention can vary depending on the sealing degree of the heat insulating space. Moreover, the reason why the hard resin is used for the inner container and the outer container is to withstand the weight and maintain the container shape even when liquid or the like is put in the double container. However, the double container made of hard resin is worse than the double container made of glass because of its material, when the mouth is attached.
Japanese Utility Model Publication No. 61-34080

  In addition, as a conventional double container, both the inner container and the outer container are made of glass, and the upper part of the inner container and the outer container are in close contact with each other through an O-ring. Increase.

  Therefore, the present inventor makes the inner container made of glass and the outer container made of a hard resin, fits the inner and outer containers using the unevenness, and projects the inner container made of glass upward from the outer container. I thought that the above problem could be solved. However, since the inner container made of glass is not deformed, the outer container made of hard resin spreads beyond its capacity and cracks during fitting. By the way, when both the inner container and the outer container are made of hard resin, not only the outer container spreads but also the inner container shrinks and can be fitted without being damaged.

  The present invention has been created in view of the above circumstances, and an object of the present invention is to fit the glass inner container and the hard resin outer container together without causing damage.

  The present invention covers the outer side of a bottomed cylindrical inner container with an outer container through a heat-insulating space, and provides a convex groove on one of the upper part of the inner container and the upper part of the outer container, and a concave groove on the other. It is premised on a double container in which the inner container and the upper part of the outer container are brought into close contact with each other in the circumferential direction by fitting the groove and the groove.

  The invention of claim 1 uses glass as the material of the inner container, and uses heat-shrinkable resin as the material of the outer container that has both the rigidity to maintain the shape of the container and the flexibility at the time of fitting. The inner container is press-fitted into the outer container at a possible temperature, the upper end of the glass inner container protrudes upward from the outer container to form a mouth, and the ridges and the grooves are brought into close contact using heat shrinkage. Features.

  The outer container may be opaque, but a transparent one is used so that beverages or the like placed in the double container can be seen through the container. In this way, heat shrinkage is used for the close contact between the groove and the ridge, and no O-ring or adhesive is used, so that a transparent appearance with good appearance can be maintained.

  When the ridge is provided on the resin outer container and the concave groove is provided on the glass inner container, the glass inner container has a portion corresponding to the concave groove on the inner peripheral surface thereof due to sinking during solidification after molding. It will be depressed. If there is a ring-shaped recess on the inner peripheral surface, dirt tends to accumulate and it becomes difficult to wash the inner surface of the double container. In order to prevent this, it is desirable to provide the ridges in the glass inner container and the grooves in the resin outer container as in the second aspect of the invention. If the ridges are provided on the inner container made of glass, the inner peripheral surface of the inner container becomes a smooth cylindrical curved surface with no bumps.

  The invention of claim 1 is made of glass by combining a device that uses a resin having both rigidity and flexibility as the material of the outer container, and press-fitting the inner container into the outer container having a heat shrinkable temperature. Even if the inner container is press-fitted into the resin-made outer container, the outer container can be fitted without breaking. Then, the glass mouth provides a good feel when the mouth is attached. In addition, since the heat insulating shrinkage space is formed by closely contacting the grooves and the ridges by heat shrinkage, the conventional O-ring is unnecessary, and as a result, the number of parts is reduced and the production cost is reduced.

  In the invention of claim 2, since the ridges are provided in the inner container made of glass, the portion corresponding to the ridges on the inner peripheral surface of the inner container is not depressed during solidification after molding, and the entire inner peripheral surface is not formed. A smooth cylindrical curved surface without bumps. Therefore, it is difficult for dirt to collect on the inner surface of the inner container and it is easy to wash.

  As shown in FIGS. 1 and 2, the first example of the double container of the present invention is a mug-shaped one comprising a transparent glass inner container 1 and a transparent resin outer container 2.

  The inner container 1 has a bottomed cylindrical shape, and an upper end portion of the inner container 1 serves as a mouth portion 3, and the mouth portion 3 projects outwardly in a step shape from the lower side. A ring-shaped ridge 4 is projected along the outer peripheral direction on the outer peripheral surface of the inner container 1 and in the vicinity of the lower side of the mouth 3. On the other hand, the inner peripheral surface of the inner container 1 is a smooth cylindrical curved surface with almost no steps.

  The outer container 2 has a bottomed cylindrical shape that is slightly larger than the inner container 1, and a ring-shaped concave groove 5 into which the protrusion 4 is fitted is formed along the inner peripheral direction at the upper end portion of the inner peripheral surface thereof. It is. Further, when the outer container 2 and the inner container 1 are fitted and brought into close contact with each other using the concave grooves 5 and the ridges 4, a heat insulating space 6 is formed between the outer container 2 and the inner container 1, and the outer container 2. Of the inner container 1 is in close contact with the bottom 3 of the inner container 1 without a gap. Positioning ribs 8 projecting upward are provided at the peripheral edge of the bottom wall 7 of the outer container 2 at intervals in the circumferential direction, and the outer peripheral surface of the lower end portion of the inner container 1 hits the positioning ribs 8. An air vent hole 9 is formed in the bottom wall 7 of the outer container 2, and a plug 10 is filled in the air vent hole 9 to seal the heat insulating space 6. Reference numeral 11 denotes a handle.

  As the material of the outer container 2, a mixture of styrene and the trade name Asaflex (registered trademark) manufactured and sold by Asahi Kasei Co., Ltd. at a ratio of 50:50 to 70:30 (% by weight) is used. Stiffness for maintaining the container shape is provided by styrene, and flexibility necessary for fitting the concave grooves 5 and the ridges 4 is provided by Asaflex. If the blending ratio of styrene is increased from the upper limit of the above-described range, the outer container 2 becomes hard and cracks during press-fitting. On the other hand, if the blending ratio of Asaflex is increased beyond the upper limit of the above range, the outer container 2 becomes soft and the container shape cannot be maintained. Asaflex is a styrene-butadiene block copolymer that exhibits high transparency, excellent impact resistance, excellent hinge characteristics, excellent compatibility with styrene-based resins, and improved impact resistance.

  In the first example, the double container is made by press-fitting the inner container 1 into the outer container 2. The first point to be noted here is that the outer container 2 is a hot one immediately after molding, that is 60 ° C to 100 ° C. If attention is paid to this point, there is no possibility of cracking even if the outer container 2 spreads momentarily due to the fitting of irregularities during press-fitting. Since the outer container 2 is thermally contracted by natural cooling, the outer container 2 and the inner container 1 are completely integrated. The second point of caution is to press fit with the air vent hole 9 of the outer container 2 open, and to plug the stopper 10 after the press fit. When the air vent hole 9 is filled with the stopper 10, the press-fit cannot be performed because the air does not escape when the inner container 1 is press-fitted into the outer container 2. The glass inner container 1 is formed by press blow molding. In other words, it is a molding method in which molten glass is put into a mold, and the molten glass is caused to follow the mold to some extent by pressing, and then the blown glass is accurately blown to the mold by air blowing so as to obtain a desired shape. is there.

  As shown in FIG. 3, the second example of the double container according to the present invention is characterized in that the heat insulating space 6 between the inner container 1 and the outer container 2 is filled with a cooling agent 12. Thereby, the cold insulation effect lasts for a long time.

  The outer container 2 is formed by separately forming a cylindrical outer peripheral wall 13 with a handle and a bottom wall 7 and ultrasonically welding the bottom wall 7 to the lower end of the outer peripheral wall 13. The air vent hole 9 larger than that in the first example is opened, and a stopper 10 that matches the size is used.

  As the cooling agent 12, for example, water is added to an organic thickener such as wheat starch to prepare a paste, and 5 to 16% by weight of a salt containing sodium chloride as a main component is added thereto to adjust the viscosity to 2 to 2. What is made into 3000 poise is used. Such a cold-retaining agent maintains a paste state even when cooled to about −200 ° C., and its expansion due to a decrease in temperature is small, so that the inner container 1 and the outer container 2 can be prevented from being deformed or damaged. . Note that a heat insulating material may be used instead of the cold insulating agent.

It is sectional drawing which decomposes | disassembles and shows the 1st example of the double container of this invention. (A) The figure is a top view which shows the 1st example of the double container of this invention, (b) A figure is sectional drawing. It is sectional drawing which shows the 2nd example of the double container of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inner container 2 Outer container 3 Mouth part 4 Convex strip 5 Concave groove 6 Thermal insulation space

Claims (2)

The outer side of the bottomed cylindrical inner container (1) is covered with the outer container (2) through the heat insulating space (6), and a convex line is formed on one of the upper part of the inner container (1) and the upper part of the outer container (2). (4), a concave groove (5) is provided on the other side, and the upper portions of the inner container (1) and the outer container (2) are arranged along the circumferential direction by fitting the ridges (4) and the concave grooves (5). In the double container to be closely attached,
Glass is used for the material of the inner container (1), and the material for the outer container (2) is made of a resin that has the rigidity to maintain the shape of the container and the flexibility at the time of fitting. The inner container (1) is press-fitted into the outer container (2), and the upper end of the glass inner container (1) protrudes upward from the outer container (2) to form the mouth part (3). And a double container characterized by sticking a protruding line (4) and a ditch | groove (5) closely.   The double container according to claim 1, characterized in that the ridge (4) is provided in the glass inner container (1) and the groove (5) is provided in the resin outer container (2).

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