JP2005059879A - Multiple insulation cup - Google Patents

Abstract

Provided is a multiple heat insulating cup in which an outer cup made of paper and an inner cup made of plastic are securely engaged, can be easily separated by fingers after use, and can be easily separated and collected from paper and plastic.
SOLUTION: An upper end peripheral wall engaging portion 7 is provided at each of the upper end edges 3 of the peripheral walls 5 and 6 of the outer cup 1 and the inner cup 2 of the multiple heat insulating cup, and a bottom wall engaging portion 10 is provided at each of the bottom walls 8 and 9. The heat insulating space 11 is provided between the entire peripheral surfaces of the cups, and the engaging portions are easily separated by the finger pressing force and the tensile force.
[Selection] Figure 1

Description

The present invention relates to cardboard and thin-walled synthetic resin used for containers such as ice cream and other frozen foods, coffee and tea, and hot drinks such as instant soup and instant noodles. The present invention relates to an improvement of a structured multi-container having thermal insulation properties.

As a conventional heat insulating cup, for example, a plastic cup is molded, and a heat insulating material having an embossed heat insulating layer on one side of a liner paper is wound around and fixed to form a heat insulating cup.
In this heat insulating cup, it is necessary to adhere a liner to the entire outer periphery of the side wall of the plastic cup, and there is a problem that it is not easy to separate the plastic cup and the paper liner after use.

Further, as the double container, a concave groove is formed around the flange of the plastic inner container, and the convex part obtained by curling the opening of the outer container mainly made of paper inside is formed into the concave groove of the inner container. By fitting, there is one in which heat is not easily transmitted to the outer wall, and the inner and outer containers can be firmly fitted and fixed just by pressing each other, and are difficult to come off.
In the double container, when the outer container is to be pulled off from the inner container after use, the container inherently has a frictional force due to the shape of the curled portion fitted in the concave groove due to the force to be pulled off. Since the outer container is prevented from coming off, the outer container and the inner container are not easily separated.
JP 11-278455 A No. 3-38089

Recently, separation processing of plastic and paper is desired.
It is easy to manufacture parts, is easy to assemble, has no trouble during use, has sufficient heat insulation, and has a structure that makes it very easy to separate the plastic cup from the paper cup for separation after use. It has become a challenge.

In view of the problems of the conventional heat insulation cup, in the invention of claim 1, a multiple heat insulation cup is disposed inside a paper outer cup, and a plastic inner cup provided with a small flange is provided, The engagement portion between the outer cup and the inner cup is composed of an upper end peripheral wall engagement portion and a bottom wall engagement portion, and is provided with a horizontal step at the upper end portion of the inner wall of the inner cup. An inner cup undercut portion that is continuous with the lower surface of the outer cup, and a top portion that is formed by bending the upper end portion of the peripheral wall of the outer cup inwardly and that contacts the lower surface of the small flange that is continuous with the inner cup undercut portion. It consists of an outer cup undercut part, and both the undercut parts of both cups are fitted and fixed by pressing the inner and outer cups to form an upper end peripheral wall engaging part. The bottom wall of the outer cup and the bottom wall of the inner cup And at least the circumference of the outer cup The bottom wall engaging portion is formed at the abutting portion including the circular locus of the bottom wall of the outer cup formed inside the wall, the entire circumferential surface excluding the engaging portion of the outer cup, and the inner cup A series of heat insulation spaces are formed between the outer peripheral surface excluding the engaging portion.

In the invention of claim 2, the upper end peripheral wall engaging portion is on the upper end portion of the peripheral wall of the inner cup.
Connected to the lower part of the small flange and recessed, and the inner cup undercut part consisting of an inclined wall gradually facing the container center and the outward horizontal step part connected to its lower end, and the upper end of the peripheral wall of the outer cup inward And an outer cup undercut portion formed by being bent at an angle, and by pressing both inner and outer cups, both undercut portions of both cups are fitted and fixed, and both inner and outer cups are engaged. Added to the invention of Item 1.

According to the first and second aspects of the present invention, both cups are formed separately, except for the upper end peripheral wall portion including the upper end edge of the peripheral wall of the outer cup and the inner cup that form the upper end peripheral wall engaging portion having different shapes. By doing so, since the shape can be designed freely, it is possible to achieve an effect that the heat insulation space can be freely designed and formed between both cups.

The engaging portion between the outer cup and the inner cup is formed in contact with the upper end peripheral wall engaging portion and the bottom wall engaging portion, respectively. It can be strengthened, and it can maintain the integrated shape without any hindrance before and during use as a container by engaging the inner and outer cups with a simple shape, and it is free between the peripheral and bottom walls of both the inner and outer cups. The effect which can hold | maintain the heat insulation space where the degree is large is produced.

In the first and second aspects of the invention, the fitting structure called the undercut structure facilitates fitting and joining of the outer cup and the inner cup without using other extra materials such as an adhesive. In other words, after the edge of the paper cup opening is bent inward, the plastic cup can be easily fitted by simply pushing the plastic cup into the paper cup.

Moreover, since the undercut part to the inside of the paper cup which is an outer cup closely_contact | adheres to the undercut part of a plastic inner cup by the elasticity of paper, there also exists an effect that strong joint strength is acquired.

According to the present invention, after use of the container, the lower flange portion of the container is crushed by the pressing force of the fingers, so that the fitting portion of the undercut part is removed, and by applying a tensile force to the small flanges with the fingers, the inside and outside can be easily performed. Both cups come off, the inner cup is pulled out, and there is an effect that the plastic and paper can be easily separated.

In particular, according to the structure of the invention of claim 2 added to the invention of claim 1, the upper end peripheral wall engaging portion comprising an inner cup undercut portion having an inclined wall and an outer cup undercut portion bent at an inclination is The push-fitting between the cup and the inner cup and the joining for holding the heat insulation space are further facilitated and reliable, and the separation process after use is further facilitated.

A small flange protrudes on the outer periphery of the upper edge of the plastic inner cup, and the inner cup undercut portion continuously recessed on the lower surface of the flange and the upper end portion of the outer wall of the outer cup are bent inward, It consists of an outer cup undercut part that abuts the top of the lower surface of the small flange, and both the cups are fitted and fixed by pressing both the inner and outer cups, and the bottom walls are also brought into contact with each other to form a heat insulating space between both cups. Sufficiently withstands use, facilitates separation of both cups after use, and facilitates separate collection.

1 and 2 show an embodiment to which the invention of claim 1 is applied. FIG. 1 is a longitudinal sectional view, and FIG. 2 is a partially enlarged longitudinal sectional view of an upper peripheral wall engaging portion 7. Paper outer cup 1
The plastic inner cup 2 with a small flange 4 projecting from the outer periphery of the upper end edge 3 is disposed inside, and the engaging portion between the outer cup 1 and the inner cup 2 is the upper end peripheral wall engaging portion 7 and the bottom. It consists of the wall engaging part 10.

The upper end peripheral wall engagement portion 7 is recessed with a horizontal step portion 15 at the upper end portion 14 of the inner wall 2 of the inner cup 2, and the inner cup undercut portion 22 is continuous with the lower surface of the small flange 4.
And an outer cup undercut portion having a top portion 21 which is formed by bending the peripheral wall upper end portion 20 of the outer cup 1 inward and abuts against the lower surface of the small flange 4 continuous with the inner cup undercut portion 22. 17, both the undercut portions 22, 17 of both the cups 2, 1 are fitted and fixed by pressing the inner and outer cups 2, 1 to form the upper end peripheral wall engaging portion 7.

The bottom wall 8 of the outer cup 1 and the bottom wall 9 of the inner cup 2 are bottoms at a contact portion including at least a circular locus 18 of the bottom wall 8 of the outer cup 1 formed inside the peripheral wall 5 of the outer cup 1. The wall uniting part 10 is formed.

A series of heat-insulating spaces 11 are formed between the outer cup 1 and the entire outer peripheral surface excluding the engaging portions 7 and 10.
In addition, the outer cup bottom wall 8 and the inner cup bottom wall 9 in the bottom wall engaging portion 10 are:
It is sufficient to simply abut each other, but it is also possible to form the bottom wall engaging portion via an adhesive having a weak adhesive force between the abutting portions.

3 and 4 show another example of the embodiment in which both the inventions of claims 1 and 2 are applied, FIG. 4 is a longitudinal sectional view, and FIG. 3 is a portion of the upper peripheral wall engaging portion 7. It is an enlarged vertical sectional view. The upper end peripheral wall engaging portion 7 is recessedly connected to the lower end of the small flange 4 at the peripheral wall upper end portion 14 of the inner cup 2, and is gradually inclined toward the container center and the outward horizontal step connected to the lower end thereof. An inner cup undercut portion 22 composed of a portion 15;
The inner cup 2 is formed by bending the peripheral wall upper end 20 of the outer cup 1 inwardly.
The outer cup undercut portion 17 is provided with a top portion 21 that contacts the lower surface of the small flange 4 and an inclined wall 23.

When the inner and outer cups 2 and 1 are pushed in, the inner cup 2 is pushed until the small flange 4 comes into contact with the top 21 which is the upper end edge of the peripheral wall 5 of the outer cup 1. Outer cup undercut part 1 that was pressed and elastically displaced
7 is elastically displaced inward at the horizontal step portion 15 of the inner cup undercut portion 22, and the horizontal step portion 15 is positioned below the outer cup undercut portion 17, and the outer cup undercut portion 17 is located at this position. Since the pressing force to the outside by the horizontal step portion 15 is lost, it is restored inward by the elasticity of the paper from the outer cup undercut portion 17, so the position of the horizontal step portion 15 as shown in FIG. In both cups 2, 1
The undercut portions 22 and 17 are engaged and engaged, and both the inner and outer cups 2 and 1 are engaged.

1 and 4 show examples of bottom wall engaging portions 10 having different shapes. In FIG. 1, the entire surface of the flat circular inner cup bottom wall 9 is the outer cup bottom wall 8. The bottom wall engaging portion 10 is formed in contact with the outer cup bottom wall 8 by a circular locus 18 at the peripheral end of the inner cup bottom wall 9 having a concave shape in FIG. Although the example which forms 10 is shown, even if the bottom wall engaging part 10 shown in FIG. 4 is combined with the upper peripheral wall engaging part 7 shown in FIG. 1, the upper end peripheral wall engaging part 7 shown in FIG. Of course, the bottom wall engaging portion 10 shown in FIG. 1 may be combined, and a bottom wall engaging portion having a shape other than the illustrated example may be combined.

1 and 4, the lower end of the outer cup peripheral wall 5 is extended to form a stationary edge 12, and a bottom wall heat insulation space 19 is formed between the stationary table and other stationary surfaces. The shape which prevents the useless heat conduction loss from the outer cup bottom wall 8 is shown.

Even in the container of the invention of the upper end peripheral wall engaging portion 7 of any one of claims 1 and 2, when trying to separate the outer cup 1 and the inner cup 2 after use of the container, the lower part of the small flange 4 of the container is The outer cup undercut portion 17 and the inner cup undercut portion 22 are easily elastically deformed by being crushed by the pressing force of the fingers, and the lower end of the outer cup undercut portion 17 is displaced outwardly. Part 22
The horizontal cup 15 is displaced outward from the horizontal step 15 so that the fitting engagement of the two portions 17 and 22 at the horizontal step 15 is released, and the inner flange 2 is pulled out by pulling the small flange 4 upward with fingers. It can be easily pulled out from the cup 1, and the plastic and paper can be easily separated.

In any of the first and second aspects of the invention, the outer cup undercut portion 17 is continuous over the entire circumference, except for the top portion 21, and a bent-down portion 24 that extends downward on the inside. Even if it is intermittently formed partially in the circumferential direction, the outer cup 1 and the inner cup 2 can be fitted, engaged, and heat-insulated space 11 in the upper peripheral wall engaging portion 7.
There is no problem with the ease of holding and sorting.

A food container that uses a heat-insulating multi-container made up of an outer cup made of cardboard and an inner cup made of thin-walled synthetic resin. If you don't want to add to the cost, it is very likely to be used.

It is a longitudinal cross-sectional view of an example of implementation of invention of Claim 1 and Claim 2. FIG. 2 is a partially enlarged longitudinal sectional view of an upper end peripheral wall portion in FIG. 1. FIG. 5 is a partially enlarged longitudinal sectional view of an upper end peripheral wall portion in FIG. 4. It is a longitudinal cross-sectional view of the other example of implementation of invention of Claim 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer cup 2 Inner cup 3 Upper end edge 4 Small flange 5 Outer cup peripheral wall 6 Inner cup peripheral wall 7 Upper end peripheral wall engaging part 8 Outer cup bottom wall 9 Inner cup bottom wall 10 Bottom wall engaging part 11 Thermal insulation space 14 Inner cup peripheral wall upper end Part 15 Horizontal step part 17 Outer cup undercut part 18 Circular locus 20 Outer cup peripheral wall upper end part 21 Top part 22 Inner cup undercut part

Claims (2)

Inside the outer cup made of paper, an inner cup made of plastic with a small flange protruding on the outer periphery of the upper end edge is arranged,
The engaging portion between the outer cup and the inner cup is composed of an upper end peripheral wall engaging portion and a bottom wall engaging portion,
The inner cup has a horizontal step at the upper end portion of the peripheral wall and is recessed, and is formed by bending the inner cup undercut portion continuous with the lower surface of the small flange and the upper end portion of the outer wall of the outer cup inwardly, It consists of an outer cup undercut portion having a top portion that contacts the lower surface of a small flange continuous with the inner cup undercut portion, and both the undercut portions of both cups are fitted and fixed by pressing the inner and outer cups. Forming a peripheral wall engaging portion,
Further, the bottom wall of the outer cup and the bottom wall of the inner cup form a bottom wall engaging portion at a contact portion including a circular locus of the bottom wall of the outer cup formed at least inside the peripheral wall of the outer cup. ,
A multiple heat insulating cup, wherein a series of heat insulating spaces are formed between an entire inner peripheral surface of the outer cup excluding the engaging portion and an entire outer peripheral surface of the inner cup excluding the engaging portion. An upper end peripheral wall engaging portion is formed at the upper end portion of the peripheral wall of the inner cup and is connected to the lower portion of the small flange so as to be formed of an inclined wall gradually toward the container center and an outward horizontal stepped portion continuous with the lower end. It consists of a cup undercut part and an outer cup undercut part that is formed by bending the upper end of the outer wall of the outer cup inwardly. Both the undercut parts of both cups are fitted and fixed by pressing the inner and outer cups. The multiple heat insulating cup according to claim 1, wherein both the inner and outer cups are engaged.

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