JP2007290767A - Low-temperature insulating container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-temperature insulating container using a plate foam containing a paper component and a resin component subjected to normal incineration as a heat insulating layer which is capable of performing assembling as the low-temperature insulating container in an extremely easy manner. <P>SOLUTION: A heat insulating layer 1 is formed by affixing a bottom plate 3 composed of a plate foam A containing the paper component and the resin component and four side plates 4-7 to a flexible sheet 2. The heat insulating layer is used to form a box-shaped container 1a by erecting the heat insulating layer in a container shape, and the low-temperature insulating container 20 is formed by storing the box-shaped container 1a in an outer box 10 having a shape-keeping property. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cold container, and more particularly to a cold container suitable for storing and storing Christmas decoration cakes, ice creams, and the like.

  As a cold storage container used in the above fields, a heat insulating layer having heat insulation is accommodated in a shape-retaining outer box, and a cold-reserved food such as a decoration cake is accommodated in the heat insulating layer. This is known. A paper container is often used as a shape-retaining outer box, and a foamed resin such as expanded polystyrene is often used as a heat insulating material for forming a heat insulating layer from the viewpoint of high heat insulating properties and light weight.

  In recent years, a new type of heat insulating material has been proposed, and Patent Document 1 or Patent Document 2 describes the new heat insulating material and a cold box containing the new heat insulating material. This heat insulating material is a sheet-form foam composed of a paper powder component or a vegetable powder component, a starch component, and a resin component, and more specifically, 10 to 40% by weight of paper powder of government-made postcard paper or general wastepaper It is a plate-like foam composed of a component or vegetable powder component, 25 to 40% by weight starch component as an auxiliary agent, and 35 to 50% by weight polyolefin resin component, and the cold box covers the inside of the outer box The plate-like foam cut into a size is incorporated so as to cover the inner surface of the outer box, and the inside of the plate-like foam in the shape of a box is used as a cold insulation gap. This type of cold storage container has an advantage that the plate-like foam can be incinerated as general garbage together with the outer box.

Japanese Patent No. 3323481 JP 2005-132470 A

  According to the description in Patent Document 1, for example, the plate-like foam is obtained by kneading a paper powder component and a starch component together with a polypropylene resin component, and extruding it with an extruder using water as a foaming medium. Can be obtained. Like a molded product made of foamed resin such as foamed polystyrene, it cannot be integrally molded into a box shape and does not have sufficient shape retention, so a heat insulation layer for cold insulation is formed using the plate-like foam. In order to form it, as described in Patent Documents 1 and 2, it is necessary to assemble a plurality of plate-like foams cut into a size covering the inside of the outer box so as to cover the inner surface of the outer box. This work requires a lot of labor, and when the cold container is to be reused, the operation of arranging the plate-like foam must be repeated each time.

  The present invention has been made in view of the above circumstances. For example, a sheet-like foam composed of a paper powder component or a vegetable powder component, a starch component, and a resin component described in Patent Document 1 or 2 is thermally insulated. It is an object of the present invention to make it possible to very easily assemble a cold storage container in a cold storage container used as a heat insulating layer having properties.

  The cold insulation container according to the present invention is a cold insulation container comprising a shape-retaining outer box and a heat insulation layer, and the heat insulation layer uses a plate-like foam containing a paper component and a resin component, and the heat insulation layer Are a rectangular bottom plate made of the plate-like foam, four rectangular side plates made of the plate-like foam arranged along four sides of the bottom plate, and the bottom plate and four sides. It is composed of a flexible sheet as a base material to which a face plate is attached, and the heat insulating layer can be developed into a flat plate shape when not in use, and in the outer box in a state of being raised into a container shape at the time of use. It is accommodated.

  In the present invention, “a plate-like foam containing a paper component and a resin component” refers to a plate-like foam produced by the same method as described in Patent Document 1 or Patent Document 2 described above. In the present specification, it may be simply referred to as “plate-like foam”. Examples of such plate-like foams include “Wonder Board” (trade name) manufactured by Tokiwa Printing Co., Ltd.

  In the cold insulation container according to the present invention, a heat insulating layer in which a base plate made of the plate-like foam and four side plates are attached to a flexible sheet as a base material is used. This heat insulating layer can be developed into a flat plate shape when not in use, and is housed in the outer box in a state of being raised into a container shape when in use.

  In the workplace where the cold-reserved food such as the decoration cake is housed in the cold-reserved container, the heat insulating layer produced separately at the factory is brought into a flat plate shape and stacked in multiple stages. In the work place, the assembling work as a cold storage container is completed simply by raising the heat insulating layer developed in a flat plate shape into a container shape and storing it in the outer container. This task is very easy. Moreover, since a heat insulation layer can be stored in flat form, a storage space can also be made small.

  In the cold container according to the present invention, the material of the flexible sheet as the substrate may be a synthetic resin sheet, a paper sheet, or the like. Since the plate-like foam attached to the flexible sheet is a material that can be incinerated as general waste, it is more preferable that the flexible sheet is made of paper from the viewpoint of disposal, such as strength. In view of the above, commercially available wrapping paper is particularly preferable. In order to enable stable repeated use, it is also preferable to impart water resistance to the flexible sheet.

  In the cold container according to the present invention, the method of attaching the bottom plate made of the plate-like foam and the four side plates to the flexible sheet is arbitrary, and is not particularly limited. Adhesion may be performed with an adhesive, and in that case, it is particularly preferable to use starch paste as an adhesive because normal incineration is possible.

  In the cold insulation container according to the present invention, in order to make the heat insulating layer developed in a flat plate shape into a container shape, the flexible sheet side is placed on a flat surface with the upper side, the bottom plate is left as it is, and the four side plates are attached to the bottom plate. Start up. The rising angle may be 90 ° or less. An appropriate angle is selected according to the purpose of use. A hook-and-loop fastener for fixing can be attached to the flexible sheet so that the posture standing up at the selected angle is maintained.

  In the cold container according to the present invention, the outer box having shape retention can be made of any material provided that it has the strength necessary for shape retention. It may be a resin outer box or a paper outer box. In the case of resin, it may be either foamed or non-foamed. As described above, since the plate-like foam constituting the heat insulating layer is a material that can be incinerated as general waste, a paper outer box is preferable, and an outer box made of cardboard is preferable in terms of strength. It is particularly preferable to impart water resistance to the outer box from the viewpoint of improving storage stability.

  In addition, if a heat insulation layer is provided with the 1 sheet of flexible sheet | seat used as the inner surface side of a container, the baseplate joined to the back surface, and four side plates, the intended objective can be achieved. You may make it clamp a bottom plate and four side plates from both surfaces using two flexible sheets. In this aspect, the bottom plate made of the plate-like foam and the four side plates are not exposed to the outside and are less likely to be damaged, which is more effective for repeated use of the heat insulating layer.

  In the cold insulation container according to the present invention, as the heat insulating layer, a heat insulating layer further including a string member that can be pulled up with respect to the bottom plate by pulling the four side plates can be used. In the heat insulation layer of this form, it is possible to easily form the container shape by pulling the string member upward from the flat open state, so that the assembly work as a cold storage container is further facilitated. can do.

  According to the present invention, in a cold insulation container using a plate-like foam containing a paper component and a resin component that can be incinerated as general waste as a heat insulation layer, the assembly of the outer container having the heat insulation layer and the shape retention property is easy and quick. To do. For this reason, for example, it is possible to improve the efficiency of work when housing a Christmas decoration cake, ice cream or the like in a cold storage container. In addition, disposal of the cold storage container is facilitated.

  Hereinafter, the present invention will be described based on embodiments with reference to the drawings. FIG. 1 shows an example of a plate-like foam containing a paper component and a resin component forming a bottom plate of a heat insulating layer and four side plates in a cold storage container according to the present invention. FIG. 2 is a rear view (FIG. 2 a) showing the heat insulating layer in a flat open state and a perspective view (FIG. 2 b) seen from the upper surface side, and FIG. 3 is a heat insulating layer ( Fig. 3a) shows an example of an outer box (Fig. 3b) that houses it. FIG. 4 is a perspective view showing a cold container according to the present invention.

  A plate-like foam A containing a paper component and a resin component used in the cold container 20 according to the present invention has a long strip shape as shown in FIG. As described above, the plate-like foam A is, for example, as described in Patent Document 1, 10 to 40% by weight of the paper powder component or vegetable powder component of government-made postcard waste paper or general waste paper, and 25 to 25 as an auxiliary agent. It can be obtained by extruding a kneaded product composed of 40% by weight starch component, 35-50% by weight polyolefin resin component and water from an extruder.

  As shown in FIG. 2, the plate-like foam A is cut to a required size, and a rectangular bottom plate 3 and four rectangular side plates 4 arranged along the four sides of the bottom plate 3. , 5, 6 and 7, which are attached to a flexible sheet 2 as a base material to form a heat insulating layer 1. The heights of the side plates 4 to 7 are all equal, and in this embodiment, the flexible sheet 2 is an extension of the upper side of the side plates 4 to 7, that is, the side opposite to the bottom plate 3, as shown in the figure. The area of the rectangle formed by the intersection of. In this example, a commercially available wrapping paper having water resistance is used for the flexible sheet 2 as a base material, but other paper sheets may be used, and the synthetic resin may be foamed or not. It may be a material such as a foam sheet, a nonwoven fabric, a woven fabric, or the like. When giving priority to the cold insulation function, an aluminum vapor deposition layer or an aluminum foil laminate layer may be formed on the surface side of the flexible sheet 2.

  When this heat insulating layer 1 is not used as a container, it is in a state where it is flattened as shown in FIG. 2, and is stacked and stored in multiple stages. When used as a container, the heat insulating layer 1 is placed on a flat surface with the flexible sheet 2 facing up. Then, the four peripheral side walls 4 to 7 are sequentially raised, for example, at 90 degrees, and the corner portion 2a of the flexible sheet 2 is pulled out and folded to an appropriate side plate (in the example shown in FIG. 3). Press against the side plates 7 and 5). And by adhere | attaching with the adhesive tape 8, as shown to FIG. 3 a, the heat insulation layer 1 becomes the box-shaped container 1a of the standing position, and the attitude | position is maintained as it is. Instead of the adhesive tape 8, a surface adhesive tape may be attached to the flexible sheet 2 in advance.

  By storing the box-shaped container 1a formed by raising the heat insulating layer 1 in an outer box 10 having an appropriate shape-retaining property as shown in FIG. 3b, the cold-insulated container 20 according to the present invention shown in FIG. It is said. The outer box 10 may be any outer box as long as it has the required shape retention, but preferably, the outer box 10 made of paper is preferable because it can be incinerated simultaneously with the heat insulating layer 1. The outer box 10 made of corrugated cardboard is more preferable in terms of strength. It is more preferable to impart water resistance to the outer box 10 from the viewpoint of improving storage stability.

  As shown in FIG. 4, the box-shaped container 1 a is accommodated in the outer box 10, and if necessary, an inner lid (not shown) formed of the plate-like foam A described above is disposed thereon, The lid portion 11 of the outer box 10 is folded and restrained so that the lid 11 does not open with an adhesive tape or the like. Other heat insulating materials can also be used as the inner lid.

  Although not shown, the bottom plate 3 and the four side plates 4 to 7 may be disposed between the two flexible sheets 2 and 2 as the heat insulating layer 1. In this aspect, since both sides of the bottom plate 3 and the four side plates 4 to 7 are covered with the flexible sheets 2 and 2, the plate-like foam constituting the bottom plate 3 and the four side plates 4 to 7. It is possible to prevent A from being damaged, and it becomes easy to repeatedly use the heat insulating layer 1.

  Furthermore, in the illustrated example, the side plates 4 to 7 are shown to be raised at an angle of 90 ° with respect to the bottom plate 3, but the container can be used without any trouble even if the rising angle is a more obtuse angle. . Of course, in that case, the outer box 10 having a larger bottom area is used.

  5 and 6 show other forms of the heat insulating layer 1. Here, FIG. 5 corresponds to FIG. 2, FIG. 6 corresponds to FIG. 3a, and the same members are denoted by the same reference numerals. In this heat insulating layer 1A, through holes 9 are formed in the upper side corners of the side plates 4 to 7 so as to pass through the flexible sheet 2, and the string members 30 are formed using the through holes 9. It differs from the heat insulation layer 1 shown in FIGS. 2 and 3 in that it is attached over the entire circumference.

  In the case of this heat insulating layer 1A, the four side plates 4 to 7 are raised at the same time by pulling the string member 30 upward at one place or at two opposite positions, so that it opens in a flat plate shape. From the posture, the shape of the box-shaped container 1a shown in FIG. 6 can be obtained very easily. And since the string member 30 pulled upward can also be used as a handle, the operation | work accommodated in the outer box 10 is also facilitated.

The figure which shows an example of the plate-like foam containing the paper component and resin component which are used for the baseplate of a heat insulation layer in the cold storage container by this invention, and four side plates. The rear view (FIG. 2a) shown in the state which opened the heat insulation layer in the cold storage container by this invention planarly, and the perspective view seen from the upper surface side (FIG. 2b). The figure which shows an example of the heat insulation layer (FIG. 3a) in the state stood up in the container shape, and the outer box (FIG. 3b) which accommodates it. The perspective view which shows the cold storage container by this invention. The rear view (FIG. 5a) which shows the heat insulation layer of another form in the planar open state, and the perspective view (FIG. 5b) seen from the upper surface side. The perspective view which shows the state which stood up the heat insulation layer shown in FIG. 5 in the container shape.

Explanation of symbols

A ... a plate-like foam containing a paper component and a resin component used in the heat insulating layer according to the present invention, 1, 1A ... a heat insulating layer, 1a ... a box-shaped container in which the heat insulating layer is raised, 2 ... a flexible sheet, 2a ... corner portion of flexible sheet, 3 ... bottom plate, 4, 5, 6, 7 ... side plate, 8 ... adhesive tape, 10 ... outer box with shape retaining property, 11 ... lid of outer box, 20 ... cold insulation Container outer box, 30 ... string member

Claims (3)

A cold insulation container comprising a shape-retaining outer box and a heat insulating layer, wherein the heat insulating layer uses a plate-like foam containing a paper component and a resin component,
The heat insulating layer includes a rectangular bottom plate made of the plate-like foam, four rectangular side plates made of the plate-like foam arranged along four sides of the bottom plate, and the bottom plate 4 It is composed of a flexible sheet as a base material to which a sheet of side plates is attached,
The heat insulating layer can be developed into a flat plate shape when not in use, and is stored in the outer box in a state of being raised into a container shape when in use.   The cold storage container according to claim 1, wherein the outer box having shape retention and the flexible sheet are made of paper having water resistance.   The heat insulating layer according to claim 1 or 2, wherein the heat insulating layer further includes a heat insulating layer further provided with a string member that can be pulled up to have a posture in which the four side plates rise from the bottom plate. container.

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