JP6770897B2 - Insulated container for transportation - Google Patents

Description

The present invention relates to a heat insulating container.

Conventionally, a heat insulating container including a heat insulating container body and a heat insulating opening / closing lid portion for opening / closing the upper end opening of the container body has been known (see Patent Document 1 below). In the heat insulating container described in Patent Document 1, the lower end of the tubular body portion formed in a substantially quadrangular cross section of the container body is closed by the bottom lid portion, and the upper end is opened by the upper end opening. Further, the opening / closing lid portion is provided so as to be undulatingly attached to the upper end portion of the container body.

The tubular body portion of the container body includes a front wall portion and a rear wall portion facing the front and rear, and left and right side wall portions facing the left and right. The front wall portion, the rear wall portion, the left and right side wall portions, the bottom lid portion, and the opening / closing lid portion of the container body are provided with a triple heat insulating layer. This triple heat insulating layer includes a central heat insulating layer formed of a flat plate vacuum heat insulating material, and an inner heat insulating layer and an outer heat insulating layer formed of flat plate heat insulating boards polymerized on both sides of the central heat insulating layer. It is composed of. The inner heat insulating layer of the bottom lid is configured to fit into the lower end of the tubular body, and the inner heat insulating layer of the opening / closing lid is the upper end opening of the container body when the lid is closed. It is configured to fit and fit into.

With this configuration, the excellent heat insulating effect is exhibited by the synergistic action of the function of the vacuum heat insulating material and the function of the heat insulating board, the vacuum heat insulating material is protected by the heat insulating board laminated on both sides of the vacuum heat insulating material, and It is described in Patent Document 1 that when the vacuum heat insulating material is damaged, the heat insulating action becomes substantially zero or close to zero (see, for example, paragraphs 0011 to 0016 of the same document).

Japanese Unexamined Patent Publication No. 2013-10524

Patent Document 1 discloses a configuration in which a container body includes a bag for accommodating a heat insulating container body composed of a body portion and a bottom lid portion of a heat insulating layer having a three-layer structure. Since this bag is made of, for example, an aluminum-deposited sheet in which aluminum is vapor-deposited on one surface of a fiber sheet, it is flexible and flexible, and does not have sufficient rigidity. Further, in the heat insulating layer having a three-layer structure of a heat insulating container housed in a bag, a material having a relatively low strength such as a foamed resin material is used as a heat insulating board forming the inner and outer heat insulating layers. It is described in.

Therefore, in the conventional heat insulating container, the vacuum heat insulating material may be damaged together with the heat insulating board by an external impact, and the heat insulating action may be extinguished. Further, if the heat insulating board constituting the outer heat insulating layer is thickened to protect the vacuum heat insulating material from an external impact, the installation area of the vacuum heat insulating material relative to the area of the outer surface of the heat insulating container is reduced, and the heat insulating container is heated from the outside. Is easily transmitted, and the heat insulating property of the heat insulating container may be deteriorated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a heat insulating container capable of more reliably protecting the vacuum heat insulating material from an external impact and improving heat insulating properties. To do.

In order to achieve the above object, the heat insulating container of the present invention is a heat insulating container provided with a container body and a lid portion that closes an opening of the container body, and the container body is a rigid outer wall portion. The inner wall portion arranged inside the outer wall portion and the vacuum heat insulating material arranged between the inner wall portion and the outer wall portion are provided, and the vacuum heat insulating material is adjacent to the side wall of the outer wall portion. It is characterized by including the vacuum heat insulating material for the side wall arranged.

With such a configuration, the heat insulating container of the present invention cushions the impact from the outside by the rigid outer wall portion and prevents the vacuum heat insulating material arranged in the space between the outer wall portion and the inner wall portion from being damaged. Can be done. Therefore, according to the heat insulating container of the present invention, the vacuum heat insulating material can be more reliably protected from an external impact than the conventional heat insulating container.

The rigidity of the outer wall portion is the difficulty of deformation of the outer wall portion with respect to a force acting on the outer wall portion from the outside. From the viewpoint of preventing the vacuum heat insulating material from being damaged, the outer wall portion preferably has a rigidity higher than that of the vacuum heat insulating material. Further, the outer wall portion preferably has a breaking strength higher than the breaking strength of the vacuum heat insulating material.

The vacuum heat insulating material is a plate-shaped heat insulating material in which the periphery of a core material such as glass wool is covered with an exterior material such as a laminated film, and the inside of the exterior material is evacuated. By arranging such the vacuum heat insulating material for the side wall adjacent to the side wall of the outer wall portion, the installation area of the vacuum heat insulating material for the side wall can be made as large as possible with respect to the surface area of the outer surface of the container body, and the outer wall portion. The heat transfer through the side wall of the heat can be blocked in a wider range than before. Therefore, according to the heat insulating container of the present invention, the heat insulating property can be improved as compared with the conventional heat insulating container.

Here, arranging the vacuum heat insulating material for the side wall adjacent to the side wall of the outer wall portion includes the following cases. For example, when the vacuum heat insulating material for the side wall is joined to the side wall of the outer wall portion via an adhesive, when it is arranged in contact with the side wall of the outer wall portion, and when there is a slight gap with the side wall of the outer wall portion. This is the case when they are arranged so as to face each other. The gap between the vacuum heat insulating material for the side wall and the side wall of the outer wall portion can be, for example, 1 mm or less or 2 mm or less. By having such a gap, for example, when an external impact is applied to the outer wall portion, the impact can be alleviated and damage to the vacuum heat insulating material for the side wall can be prevented.

The heat insulating container may include a foamed resin material that covers the inner surface of the outer wall portion and the vacuum heat insulating material. When the inner wall portion and the foamed resin material are different members, the foamed resin material suppresses heat transfer between the outer wall portion and the inner wall portion, and improves the heat insulating property of the heat insulating container. Can be improved. Further, when the inner wall portion is made of the foamed resin material, the heat insulating property of the heat insulating container can be improved by the inner wall portion made of the foamed resin material. Further, in either case, the vacuum heat insulating material can be supported by the foamed resin material to prevent the vacuum heat insulating material from being damaged. Therefore, the vacuum heat insulating material can be more reliably protected from an external impact, and the heat insulating property of the heat insulating container can be improved.

The container body has a rectangular box shape, and the peripheral edge portion of the vacuum heat insulating material for the side wall is arranged inside the peripheral edge portion of the side wall portion of the outer wall portion, and the corner portion of the container body is formed. A buffer portion in which the vacuum heat insulating material for the side wall is not arranged may be formed. Thereby, for example, when the corner portion of the outer wall portion constituting the container body collides with an obstacle, it is possible to prevent the vacuum heat insulating material for the side wall from being impacted. Therefore, the breakage of the vacuum heat insulating material for the side wall can be prevented more effectively.

The cushioning portion may be formed between the inner corner of the outer wall portion and the outer corner of the inner wall portion. For example, the cushioning portion can be formed on the diagonal line of the rectangular container body in a plan view viewed from a direction perpendicular to the bottom wall of the container body. As a result, even if an impact is applied to the outer corner of the outer wall portion of the container body and the distance between the inner corner of the outer wall portion and the outer corner of the inner wall portion is narrowed, the impact is mitigated by the buffer portion. It is possible to more reliably prevent the vacuum heat insulating material for the side wall from being damaged.

The material of the outer wall portion and the inner wall portion is a non-foamed resin material, and the space between the outer wall portion and the inner wall portion may be filled with the foamed resin material. Thereby, desired rigidity and mechanical strength can be imparted to the outer wall portion and the inner wall portion. Further, the outer wall portion and the inner wall portion can be joined and integrated by, for example, heat welding. Further, the foamed resin material not only suppresses the transfer of heat between the outer wall portion and the inner wall portion and improves the heat insulating property of the heat insulating container, but also the inner surface of the outer wall portion and the inner wall portion. The inner surface of the portion can be supported from the inside to improve the strength.

The vacuum heat insulating material may include a vacuum heat insulating material for the bottom wall arranged adjacent to the bottom wall of the inner wall portion. In this case, the transfer of heat between the inside and the outside of the container body through the bottom wall of the outer wall portion can be suppressed, and the heat insulating property of the heat insulating container can be improved. Further, the vacuum heat insulating material for the bottom wall can be arranged so as to be separated from the bottom wall of the outer wall portion. Therefore, for example, an injection hole is formed in the bottom wall of the outer wall portion, a foamed resin material is filled in the space between the outer wall portion and the inner wall portion through the injection hole, and this space is filled with the foamed resin material. be able to.

The lid portion includes a lower wall portion that covers the opening of the container body, an upper wall portion joined to the upper side of the lower wall portion, and the upper wall portion between the upper wall portion and the lower wall portion. It may have a vacuum heat insulating material for a lid portion arranged adjacent to the portion.

By arranging the vacuum heat insulating material for the lid adjacent to the upper wall portion in this way, the vacuum heat insulating material for the lid portion is compared with the case where the vacuum heat insulating material for the lid portion is arranged adjacent to the lower wall portion. The material can be arranged in a wider area close to the area of the outer surface of the lid. Therefore, the vacuum heat insulating material for the lid portion more effectively blocks the heat transfer between the inside and the outside of the heat insulating container through the upper wall portion of the lid portion, and further improves the heat insulating property of the heat insulating container. Can be done.

A foamed resin material that fills the space between the upper wall portion and the lower wall portion may be provided. With this foamed resin material, the transfer of heat between the upper wall portion and the lower wall portion can be suppressed, and the heat insulating property of the heat insulating container can be improved. Further, the vacuum heat insulating material for the lid can be supported by the foamed resin material, and the vacuum heat insulating material for the lid can be prevented from being damaged. Therefore, the vacuum heat insulating material for the lid can be more reliably protected from an external impact, and the heat insulating property of the heat insulating container can be improved.

The material of the upper wall portion and the lower wall portion may be a non-foamed resin material. Thereby, desired rigidity and mechanical strength can be imparted to the upper wall portion and the lower wall portion. Further, the upper wall portion and the lower wall portion can be joined and integrated by, for example, heat welding.

According to the present invention, it is possible to provide a heat insulating container capable of more reliably protecting the vacuum heat insulating material from an external impact and improving the heat insulating property.

Sectional drawing of the heat insulating container which concerns on one Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II of the heat insulating container shown in FIG. The flow chart which shows an example of the manufacturing method of the heat insulation container shown in FIG. The explanatory view of the heat insulating material joining process shown in FIG. The explanatory view of the in-mold arrangement process and the foamed resin filling process shown in FIG. The explanatory view of the container joining process shown in FIG. FIG. 5 is a flow chart showing another example of the method for manufacturing the heat insulating container shown in FIG. The explanatory view of the foam resin molding process shown in FIG. The explanatory view of the heat insulating material joining process shown in FIG. The explanatory view of the container arrangement process and the container joining process shown in FIG. Schematic cross-sectional view of the heat insulating container according to the Example of this invention. Schematic cross-sectional view of a heat insulating container according to a comparative example. The graph which shows the result of the heat insulation test of the heat insulation container of an Example and a comparative example.

Hereinafter, an embodiment of the heat insulating container according to the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view taken along the vertical direction of the heat insulating container 100 according to the embodiment of the present invention. FIG. 2 is a cross-sectional view of the heat insulating container 100 along the line II-II shown in FIG.

The heat-insulating container 100 of the present embodiment includes, for example, a container body 10 having a heat-insulating property and a lid portion 20 having a heat-insulating property that closes the opening 10a at the top of the container body.

The container body 10 is formed, for example, in the shape of a rectangular box having a substantially rectangular parallelepiped shape as a whole. The container body 10 has a bottom wall 10b having a substantially rectangular plate shape and side walls 10c erected on each side of the bottom wall 10b, and the upper portion is open. That is, the container body 10 has a substantially rectangular opening 10a defined by the side wall 10c at the upper end. The shape of the container body 10 is not particularly limited, and can be formed into any shape such as a cylindrical shape, an elliptical cylinder shape, and a polygonal columnar shape. The container body 10 includes an outer wall portion 11, an inner wall portion 12, and a vacuum heat insulating material 30.

The outer wall portion 11 is made of, for example, a hard non-foamed resin. As the non-foaming resin that is the material of the outer wall portion 11, for example, a polyolefin resin such as polyethylene or polypropylene can be used. The outer wall portion 11 has a thickness of, for example, 0.5 mm or more and 5 mm or less, and has a certain rigidity and mechanical strength. The rigidity and mechanical strength of the outer wall portion 11 are made higher than, for example, the rigidity and mechanical strength of the vacuum heat insulating material 30. That is, the outer wall portion 11 is less likely to be deformed by an external force than the vacuum heat insulating material 30, and is excellent in durability, piercing strength (JIS Z1707: 1997), impact resistance, and the like.

The inner wall portion 12 is arranged inside the outer wall portion 11. The inner wall portion 12 is made of the same material as the outer wall portion 11, for example. In the illustrated example, the inner wall portion 12 has a flange portion 12a at the upper end portion. The flange portion 12a projects from the upper end portion of the inner wall portion 12 toward the outside of the opening 10a of the container body 10. The peripheral edge portion of the flange portion 12a is joined to the upper end portion of the outer wall portion 11 over the entire circumference by, for example, heat welding.

The vacuum heat insulating material 30 is a plate-shaped heat insulating material in which a heat insulating material such as glass wool is covered with an exterior material such as a laminated film on which aluminum is vapor-deposited, and the inside of the exterior material is evacuated. The vacuum heat insulating material 30 is arranged in the space between the outer wall portion 11 and the inner wall portion 12 of the container body 10. That is, in the heat insulating container 100 of the present embodiment, the container main body 10 is provided with the vacuum heat insulating material 30 inside the hollow side wall 10c and the bottom wall 10b formed by the outer wall portion 11 and the inner wall portion 12.

The heat insulating container 100 of the present embodiment includes, for example, a plurality of vacuum heat insulating materials 30. The vacuum heat insulating material 30 can include, for example, the vacuum heat insulating material 31 for the side wall and the vacuum heat insulating material 32 for the bottom wall. The vacuum heat insulating material 30 does not necessarily include the vacuum heat insulating material 32 for the bottom wall, but it is preferable to include the vacuum heat insulating material 32 for the bottom wall from the viewpoint of improving the heat insulating property of the heat insulating container 100. In the heat insulating container 100 of the present embodiment, as the vacuum heat insulating material 30, the container body 10 is provided with the vacuum heat insulating material 31 for the side wall and the vacuum heat insulating material 32 for the bottom wall.

The heat insulating container 100 of the present embodiment has the greatest feature in that it includes the vacuum heat insulating material 31 for the side wall arranged adjacent to the side wall 11c of the outer wall portion 11. More specifically, the vacuum heat insulating material 31 for the side wall is joined to the side wall 11c of the outer wall portion 11 via an adhesive, for example. Further, the vacuum heat insulating material 31 for the side wall may be supported in a state of being in contact with the side wall 11c of the outer wall portion 11, for example, or the side wall 11c of the outer wall portion 11 via a minute gap of, for example, about 0.1 mm to 2 mm. It may be arranged to face the.

Like the vacuum heat insulating material 31 for the side wall, the vacuum heat insulating material 32 for the bottom wall is joined to the bottom wall 12b of the inner wall portion 12 via an adhesive, for example. Further, the vacuum heat insulating material 32 for the bottom wall may be supported in a state of being in contact with the bottom wall 12b of the inner wall portion 12, for example, about 0.1 mm to 2 mm, like the vacuum heat insulating material 31 for the side wall. It may be arranged so as to face the bottom wall 12b of the inner wall portion 12 through a minute gap.

Further, the heat insulating container 100 may include, for example, a foamed resin material 40 that covers the inner surface of the outer wall portion 11 of the container body 10 and the vacuum heat insulating material 30. As the foamed resin material 40, for example, expanded polypropylene (EPP) by the bead method, expanded polystyrene (EPS) by the bead method, a foam of a polyurethane resin, or the like can be used. In the illustrated example, the foamed resin material 40 covers the upper surface, the lower surface, and the side surface excluding the inner surface of the outer wall portion 11 of the container body 10 and the outer surface facing the outer wall portion 11 of the vacuum heat insulating material 31 for the side wall, and the outer wall portion. The space between the 11 and the inner wall portion 12 is filled.

The foamed resin material 40 may be joined to the outer wall portion 11 and the inner wall portion 12 of the container body 10, for example, or may be fitted tightly between the outer wall portion 11 and the inner wall portion 12. In the latter case, the foamed resin material 40 is set to a thickness corresponding to the dimension between the outer wall portion 11 and the inner wall portion 12 and having a predetermined negative dimensional tolerance, and is in contact with the outer wall portion 11 and the inner wall portion 12. Alternatively, they may face each other through a minute gap. Further, the inner wall portion 12 may be omitted, and the foamed resin material 40 may be used as the inner wall portion of the container body 10. In this case, the foamed resin material 40 is exposed on the inner surface of the container body 10.

As shown in FIGS. 1 and 2, when the container body 10 of the heat insulating container 100 has a rectangular box shape, it is arranged adjacent to the outer wall portion 11 between the outer wall portion 11 and the inner wall portion 12 of the container body 10. The peripheral edge portion of the vacuum heat insulating material 31 for the side wall can be arranged inside the peripheral edge portion of the side wall 11c of the outer wall portion 11. As a result, a cushioning portion 10e in which the vacuum heat insulating material 31 for the side wall is not arranged is formed at the corner portion 10d of the container body 10. Here, the corner portion 10d of the container body 10 is a sharp portion formed between the side wall 10c and the side wall 10c of the container body 10 or between the side wall 10c and the bottom wall 10b.

As shown in FIG. 2, the cushioning portion 10e of the corner portion 10d of the container body 10 is formed between, for example, the inner corner 11e of the outer wall portion 11 of the container body 10 and the outer corner 12d of the inner wall portion 12. May be good. Further, the cushioning portion 10e can be formed on the diagonal DL of the rectangular container body 10 in a plan view viewed from a direction perpendicular to the bottom wall 10b of the container body 10, for example. The inner corner 11e of the outer wall portion 11 extends from the bottom wall 11b of the outer wall portion 11 shown in FIG. 1 to the upper end of the side wall 11c of the outer wall portion 11 along the direction perpendicular to the bottom wall 11b. Similarly, the outer corner 12d of the inner wall portion 12 extends from the bottom wall 12b of the inner wall portion 12 shown in FIG. 1 to the upper end of the side wall 12c of the inner wall portion 12 along the direction perpendicular to the bottom wall 12b. ing.

Further, as shown in FIG. 1, in the direction perpendicular to the bottom wall 10b of the container body 10, the inner dimension H2 of the buffer portion 10e with respect to the inner dimension H1 of the outer wall portion 11 satisfies, for example, the following equation (1).
Further, as shown in FIG. 2, in the direction along the bottom wall 10b of the container body 10, the vertical and horizontal inner dimensions L3 and L4 of the buffer portion 10e with respect to the vertical and horizontal inner dimensions L1 and L2 of the outer wall portion 11 are, for example, as follows. The equations (2) and (3) are satisfied.

0.04 ≦ (H2 × 2) / H1 ≦ 0.15 (1)
0.04 ≦ (L3 × 2) / L1 ≦ 0.15 (2)
0.04 ≦ (L4 × 2) / L2 ≦ 0.15 (3)

That is, as shown in FIG. 1, in the height direction perpendicular to the bottom wall 10b of the container body 10, the total of the inner dimensions H2 of the cushioning portions 10e formed at both ends of the side wall 11c of the outer wall portion 11 is the outer wall portion. It is preferable that the inner dimension H1 in the height direction of 11 is 4% or more and 15% or less. Further, as shown in FIG. 2, in a flat cross section along the bottom wall 10b of the container body 10, the total inner dimensions L3 of the cushioning portions 10e formed at both ends of the side wall 11c along the vertical direction of the rectangular outer wall portion 11. Is preferably 4% or more and 15% or less of the vertical inner dimension L1 of the outer wall portion 11. Further, in a plan view perpendicular to the bottom wall 10b of the container body 10, the total of the inner dimensions L4 of the cushioning portions 10e formed at both ends of the side wall 11c along the lateral direction of the rectangular outer wall portion 11 is the sum of the outer wall portions 11. It is preferably 4% or more and 15% or less of the inner dimension L2 in the lateral direction.

The lid portion 20 includes, for example, a lower wall portion 21 that covers the opening 10a of the container body 10, an upper wall portion 22 joined to the upper side of the lower wall portion 21, and the upper wall portion 22 and the lower wall portion 21. It is possible to have the vacuum heat insulating material 33 for the lid portion arranged adjacent to the upper wall portion 22 between the two. The lid portion 20 is formed in a flat plate shape and can have a convex portion that engages with the opening portion 10a of the container body 10. As the material of the upper wall portion 22 and the lower wall portion 21, the same non-foamed resin material as the outer wall portion 11 and the inner wall portion 12 of the container body 10 described above can be used.

Further, as the vacuum heat insulating material 33 for the lid portion, the same material as the vacuum heat insulating material 30 of the container body 10 described above can be used. The lid portion 20 may be manufactured by integrally molding the lower wall portion 21 and the upper wall portion 22 at the same time by, for example, blow molding. In this case, the lid portion 20 does not have to have the vacuum heat insulating material 33 for the lid portion inside.

The vacuum heat insulating material 33 for the lid portion is joined to the upper wall portion 22 via an adhesive, for example, in the same manner as the vacuum heat insulating material 31 for the side wall described above. Further, the vacuum heat insulating material 33 for the lid portion may be supported in a state of being in contact with the upper wall portion 22, for example, like the vacuum heat insulating material 31 for the side wall portion, and for example, a minute gap of about 0.1 mm to 2 mm may be supported. It may be arranged so as to face the upper wall portion 22 via the above.

Further, the lid portion 20 may be provided with a foamed resin material 50 that fills the space between the upper wall portion 22 and the lower wall portion 21, similarly to the container body 10 described above. As the foamed resin material 50, the same material as the foamed resin material 40 of the container body 10 described above can be used. Further, similarly to the foamed resin material 40 of the container body 10 described above, the foamed resin material 50 may be joined to the upper wall portion 22 and the lower wall portion 21 of the lid portion 20, for example, or the upper wall portion 22. It may be fitted tightly between the lower wall portion 21 and the lower wall portion 21. In the latter case, the foamed resin material 50 is set to a thickness corresponding to the dimension between the upper wall portion 22 and the lower wall portion 21 and having a predetermined negative dimensional tolerance, and the upper wall portion 22 and the lower wall portion 21 are set. It may be in contact with 21 or may face them through a minute gap.

Hereinafter, the operation of the heat insulating container 100 of the present embodiment will be described.

In the heat insulating container 100 of the present embodiment, for example, an article requiring heat retention or cold insulation is housed in the container body 10 through the opening 10a of the container body 10, and the opening 10a of the container body 10 is closed by the lid 20. Therefore, the internal space in which the article is housed can be isolated from the surrounding environment and insulated.

Articles housed inside the heat insulating container 100 include, for example, soft drinks, confectionery, seafood such as fresh fish, processed foods such as ham and sausage, various carcasses and meat, dairy products such as cheese, vaccines and ampoules. Many of them are relatively heavy, such as medicines, rice, prepared foods, and fruits and vegetables. When a heavy article is housed inside the heat insulating container 100, for example, when the heat insulating container 100 is dropped or hit against an obstacle, the impact acting on the heat insulating container 100 from the outside tends to be large. Therefore, the heat insulating container 100 is required to have high impact resistance, durability, and cushioning property.

Here, in the heat insulating container 100 of the present embodiment, the container body 10 has a rigid outer wall portion 11, an inner wall portion 12 arranged inside the outer wall portion 11, and the inner wall portion 12 and the outer wall portion 11. It is provided with a vacuum heat insulating material 30 arranged between them. Further, the vacuum heat insulating material 30 includes the vacuum heat insulating material 31 for the side wall arranged adjacent to the side wall 11c of the outer wall portion 11. In other words, the container body 10 includes the vacuum heat insulating material 31 for the side wall, which is arranged adjacent to the side wall 11c of the outer wall portion 11, as the vacuum heat insulating material 30.

As a result, for example, even when an obstacle collides with the heat insulating container 100 and an impact is applied to the container body 10 from the outside during transportation of the heat insulating container 100, the shock is mitigated by the rigid outer wall portion 11 and a vacuum is provided. The heat insulating material 30 can be protected to prevent damage. Further, the strength of the container body 10 is ensured by the rigid outer wall portion 11, and for example, a plurality of heat insulating containers 100 can be stacked during transportation or storage of the heat insulating container 100.

Further, the surface area of the outer surface of the side wall 10c of the container body 10 is compared with the case where the vacuum heat insulating material 31 for the side wall is arranged between the outer wall portion 11 and the inner wall portion 12 or adjacent to the side wall 12c of the inner wall portion 12. It becomes possible to expand the installation area of the vacuum heat insulating material 31 for the side wall. This is because the surface area of the side wall 11c of the outer wall portion 11 is larger than the surface area of the side wall 12c of the inner wall portion 12.

In this way, by expanding the installation area of the vacuum heat insulating material 31 for the side wall as compared with the conventional case, the vacuum heat insulating material 31 for the side wall is used between the inside and the outside of the container body 10 via the side wall 11c of the outer wall portion 11. The heat transfer can be blocked in a wider range. Therefore, according to the heat insulating container 100 of the present embodiment, the vacuum heat insulating material 30 can be more reliably protected from an external impact and the heat insulating property can be improved as compared with the conventional heat insulating container 100.

Further, as described above, when the vacuum heat insulating material 31 for the side wall is joined to or in contact with the side wall 11c of the outer wall portion 11, the heat transferred to the inside of the container body 10 via the side wall 10c of the container body 10 The transmission route is as follows. First, the heat of the outside air is transferred to the side wall 11c of the outer wall portion 11 of the container body 10. Further, heat is sequentially transferred from the side wall 11c of the outer wall portion 11 to the inside of the container body 10 via the vacuum heat insulating material 31 for the side wall, the foamed resin material 40, and the side wall 12c of the inner wall portion 12.

Here, the thermal conductivity of each member is, for example, about 0.17 W / (m · K) to about 0.19 W / (m · K) for the outer wall portion 11 and about 0.004 W / W / for the vacuum heat insulating material 30. (M · K), the foamed resin material 40 is about 0.022 W / (m · K) to about 0.033 W / (m · K), and the inner wall portion 12 is about the same as the outer wall portion 11. In this way, by arranging the vacuum heat insulating material 31 for the side wall on the outer side of the container body 10 adjacent to the side wall 11c of the outer wall portion 11 having a relatively high thermal conductivity, the outer side of the container body 10 can be arranged. The heat transfer can be effectively blocked on the side, and the heat insulating property of the container body 10 can be improved.

More specifically, the foamed resin is blocked from the heat transferred from the side wall 11c of the outer wall portion 11 to the foamed resin material 40 and the air between the outer wall portion 11 and the inner wall portion 12 by the vacuum heat insulating material 31 for the side wall. The heat transferred to the inner wall portion 12 via the material 40 and air can be reduced. Therefore, a higher heat insulating effect can be obtained in the container body 10. In addition, dew condensation on the outer surface of the container body 10 can be prevented.

Further, the container body 10 may have a gap between the side wall 11c of the outer wall portion 11 and the vacuum heat insulating material 31 for the side wall. In this case, the heat insulating layer is formed by the air between the side wall 11c of the outer wall portion 11 and the vacuum heat insulating material 31 for the side wall. The thermal conductivity of air is, for example, about 0.026 W / (m · K), which is lower than the thermal conductivity of the outer wall portion 11. Therefore, the heat transferred from the outer wall portion 11 to the vacuum heat insulating material 31 for the side wall can be reduced by the heat insulating layer of air, and the heat insulating property of the container body 10 can be improved.

Further, as described above, the heat insulating container 100 of the present embodiment includes the vacuum heat insulating material 32 for the bottom wall in which the vacuum heat insulating material 30 is arranged adjacent to the bottom wall 12b of the inner wall portion 12. In other words, the container body 10 includes the vacuum heat insulating material 32 for the bottom wall, which is arranged adjacent to the bottom wall 12b of the inner wall portion 12, as the vacuum heat insulating material 30.

The vacuum heat insulating material 32 for the bottom wall can suppress the transfer of heat between the inside and the outside of the container body 10 through the bottom wall 12b of the inner wall portion 12, and improve the heat insulating property of the heat insulating container 100. be able to. More specifically, the vacuum heat insulating material 32 for the bottom wall suppresses the heat of the article housed inside the heat insulating container 100, for example, from being transferred from the bottom wall 12b of the inner wall portion 12 to the bottom wall 11b of the outer wall portion 11. However, the heat of the article is hard to escape to the outside, and the article can be effectively kept warm.

More specifically, the article housed in the heat insulating container 100 is arranged on the bottom wall 12b of the inner wall portion 12 of the container body 10. Therefore, the heat transfer path from the article requiring heat retention to the outside of the heat insulating container 100 is the bottom wall 12b of the inner wall portion 12, the vacuum heat insulating material 32 for the bottom wall, and the foamed resin material between the inner wall portion 12 and the outer wall portion 11. 40 or air, and the bottom wall 11b of the outer wall portion 11. However, by arranging the vacuum heat insulating material 32 for the bottom wall adjacent to the bottom wall 12b of the inner wall portion 12, the heat transferred from the article housed in the heat insulating container 100 to the bottom wall 12b of the inner wall portion 12 is transferred to the inner wall portion 12 It is possible to suppress the transmission to the foamed resin material 40 or the air between the and the outer wall portion 11.

On the other hand, heat is finally transferred from the bottom wall 12b of the inner wall portion 12 to the article requiring cold insulation housed in the heat insulating container 100. Therefore, by arranging the vacuum heat insulating material 32 for the bottom wall adjacent to the bottom wall 12b of the inner wall portion 12, the bottom wall 11b of the outer wall portion 11 and the foamed resin material 40 between the outer wall portion 11 and the inner wall portion 12 or The heat transferred to the bottom wall 12b of the inner wall portion 12 through the air can be blocked. Therefore, the heat transferred from the outside of the container body 10 to the bottom wall 12b of the inner wall portion 12 can be reduced, and the heat insulating property of the container body 10 can be improved.

Further, when an article having a temperature higher than the outside air temperature is housed inside the heat insulating container 100, the heat transferred from the inner wall portion to the outer wall portion 11 is blocked by the vacuum heat insulating material 30, so that the temperature of the inner wall portion 12 is lowered. Can be suppressed to prevent dew condensation on the inner surface of the heat insulating container 100. In this case, by arranging the vacuum heat insulating material 32 for the bottom wall adjacent to the bottom wall 12b of the inner wall portion 12, the heat of the bottom wall 12b of the inner wall portion 12 is generated by the foamed resin between the inner wall portion 12 and the outer wall portion 11. It is possible to more effectively suppress the transmission to the material 40 or the air, suppress the temperature drop of the bottom wall 12b of the inner wall portion 12, and more effectively prevent the dew condensation on the inner surface of the bottom wall 12b.

Further, when the article having a temperature lower than the outside air temperature is housed inside the heat insulating container 100, the heat transferred from the outer wall portion 11 to the article inside the heat insulating container 100 can be blocked by the vacuum heat insulating material 30. As a result, it is possible to suppress the temperature drop of the outer wall portion 11 and prevent dew condensation on the outer surface of the heat insulating container 100. In this case, by arranging the vacuum heat insulating material 31 for the side wall adjacent to the side wall 11c of the outer wall portion 11, the heat of the side wall 11c of the outer wall portion 11 is generated by the foamed resin material 40 or the foamed resin material 40 between the outer wall portion 11 and the inner wall portion 12. It is possible to effectively suppress the transmission to the air and more effectively prevent dew condensation on the inner surface of the side wall 11c of the outer wall portion 11.

Further, in the heat insulating container 100 of the present embodiment, as described above, the vacuum heat insulating material 32 for the bottom wall of the container body 10 is arranged adjacent to the bottom wall 12b of the inner wall portion 12. As a result, the vacuum heat insulating material 32 for the bottom wall of the container body 10 can be arranged so as to be separated from the bottom wall 11b of the outer wall portion 11. Therefore, for example, in the manufacturing method M1 (see FIG. 3) of the heat insulating container 100 described later, an injection hole 11d (see FIG. 4A) is formed in the bottom wall 11b of the outer wall portion 11 of the container body 10, and the injection hole 11d is formed through the injection hole 11d. When the foamed resin material 40 is injected into the space between the outer wall portion 11 and the inner wall portion 12, the vacuum heat insulating material 32 for the bottom wall can be prevented from interfering with the process.

Further, as described above, the heat insulating container 100 of the present embodiment includes a foamed resin material 40 that covers the inner surface of the outer wall portion 11 of the container body 10 and the vacuum heat insulating material 30. In this case, the foamed resin material 40 of the container body 10 can suppress the transfer of heat between the outer wall portion 11 and the inner wall portion 12 of the container body 10, and can improve the heat insulating property of the heat insulating container 100. Further, the foamed resin material 40 of the container body 10 can support the vacuum heat insulating material 30 of the container body 10 and prevent damage. Therefore, according to the heat insulating container 100 of the present embodiment, the foamed resin material 40 of the container body 10 can more reliably protect the vacuum heat insulating material 30 from an external impact and improve the heat insulating property of the heat insulating container 100. Can be made to.

Further, in the heat insulating container 100 of the present embodiment, as described above, the container body 10 has a rectangular box shape. The peripheral edge of the vacuum heat insulating material 31 for the side wall is arranged inside the peripheral edge of the side wall 11c of the outer wall portion 11 constituting the container body 10. Then, a buffer portion 10e on which the vacuum heat insulating material 31 for the side wall is not arranged is formed at the corner portion 10d of the container body 10. As a result, it is possible to prevent the vacuum heat insulating material 31 for the side wall from being impacted when an obstacle collides with the corner portion 10d of the container body 10 during transportation of the heat insulating container 100, for example. Therefore, according to the heat insulating container 100 of the present embodiment, the breakage of the vacuum heat insulating material 31 for the side wall can be prevented more effectively.

Further, in the heat insulating container 100 of the present embodiment, as described above, the cushioning portion 10e of the corner portion 10d of the container main body 10 has the inner corner 11e of the outer wall portion 11 of the container main body 10 and the outer corner 12d of the inner wall portion 12. Is formed between. As a result, for example, an impact is applied to the corner portion 10d of the container body 10, that is, the outer corner of the outer wall portion 11, and the portion near the inner corner 11e of the outer wall portion 11 and the portion near the outer corner 12d of the inner wall portion 12. Even if the distance between the and the vacuum heat insulating material 31 is narrowed, the shock absorbing portion 10e can alleviate the impact and more reliably prevent the vacuum heat insulating material 31 for the side wall from being damaged. Since the vacuum heat insulating material 30 cannot be visually recognized from the outside of the heat insulating container 100, it is extremely important to protect the vacuum heat insulating material 30 from the external impact and prevent it from being damaged.

Further, in the heat insulating container 100 of the present embodiment, as described above, the inner dimensions H1, L1, L2 of the outer wall portion 11 of the container main body 10 and the inner dimensions H2, L3, L4 of the cushioning portion 10e have the same formula (1). From (3) is satisfied. As a result, not only can the shock absorbing portion 10e alleviate the impact and more reliably prevent the vacuum heat insulating material 31 for the side wall from being damaged, but also the installation area of the vacuum heat insulating material 31 for the side wall is secured to insulate the heat insulating container 100. The sex can be improved.

Further, in the heat insulating container 100 of the present embodiment, as described above, the materials of the outer wall portion 11 and the inner wall portion 12 of the container body 10 are non-foamed resin materials. In this case, desired rigidity and mechanical strength can be imparted to the outer wall portion 11 and the inner wall portion 12. Further, the outer wall portion 11 and the inner wall portion 12 can be joined and integrated by, for example, heat welding. Further, by using a non-foamed resin material as the material of the outer wall portion 11 and the inner wall portion 12 of the container body 10, the impact resistance and durability of the heat insulating container 100 can be improved, and the container body 100 can be washed and used repeatedly. become. Further, since the space between the outer wall portion 11 and the inner wall portion 12 is filled with the foamed resin material 40, the heat insulating property and the elasticity of the foamed resin material 40 further improve the heat insulating property and the strength of the container body 10. Becomes possible.

Further, in the heat insulating container 100 of the present embodiment, as described above, the lid portion 20 is joined to the lower wall portion 21 that covers the opening 10a of the container body 10 and the upper wall that is joined to the upper side of the lower wall portion 21. It has a portion 22 and a vacuum heat insulating material 33 for a lid portion arranged adjacent to the upper wall portion 22 between the upper wall portion 22 and the lower wall portion 21. By arranging the vacuum heat insulating material 33 for the lid portion adjacent to the upper wall portion 22 in this way, as compared with the case where the vacuum heat insulating material 33 for the lid portion is arranged adjacent to the lower wall portion 21, the lid The vacuum heat insulating material 33 for the part can be arranged in a wider area close to the area of the outer surface of the lid part 20. Therefore, the vacuum heat insulating material 33 for the lid portion more effectively suppresses the transfer of heat between the inside and the outside of the heat insulating container 100 through the upper wall portion 22 of the lid portion 20, and the heat insulating property of the heat insulating container 100. Can be further improved.

Further, as described above, the heat insulating container 100 of the present embodiment includes a foamed resin material 50 in which the lid portion 20 fills the space between the upper wall portion 22 and the lower wall portion 21. The foamed resin material 50 of the lid portion 20 can suppress the transfer of heat between the lower wall portion 21 and the upper wall portion 22, and can improve the heat insulating property of the heat insulating container 100. Further, the foamed resin material 50 of the lid portion 20 supports the vacuum heat insulating material 33 for the lid portion, and the vacuum heat insulating material 33 for the lid portion can be prevented from being damaged. Therefore, according to the heat insulating container 100 of the present embodiment, the vacuum heat insulating material 33 for the lid can be more reliably protected from an external impact, and the heat insulating property of the heat insulating container 100 can be improved.

Further, in the heat insulating container 100 of the present embodiment, as described above, the materials of the upper wall portion 22 and the lower wall portion 21 are non-foamed resin materials. As a result, desired rigidity and mechanical strength can be imparted to the upper wall portion 22 and the lower wall portion 21. Further, the upper wall portion 22 and the lower wall portion 21 can be joined and integrated by, for example, heat welding.

As described above, according to the heat insulating container 100 of the present embodiment, the vacuum heat insulating material 30 can be more reliably protected from external impacts and the heat insulating property can be improved as compared with the conventional heat insulating container 100. it can.

Hereinafter, a method for manufacturing the heat insulating container 100 of the present embodiment will be described.

FIG. 3 is a flow chart showing an example of the manufacturing method M1 of the heat insulating container 100 shown in FIG. This manufacturing method M1 can include, for example, a heat insulating material joining step S11, an in-mold placement step S12, a foamed resin filling step S13, and a container joining step S14.

FIG. 4A is an explanatory view of the heat insulating material joining step S11 shown in FIG. The heat insulating material joining step S11 is a step of joining the vacuum heat insulating material 30 to the outer wall portion 11 and the inner wall portion 12 before joining which form the container body 10. More specifically, the vacuum heat insulating material 31 for the side wall is joined to the inner surface of each side wall 11c of the outer wall portion 11 with the peripheral edge portion of each side wall 11c exposed, for example, via an adhesive. Further, the vacuum heat insulating material 32 for the bottom wall is joined to the lower surface of the bottom wall 12b of the inner wall portion 12 via, for example, an adhesive.

The area of the vacuum heat insulating material 32 for the bottom wall facing the lower surface of the bottom wall 12b of the inner wall portion 12 may be equal to the area of the lower surface of the bottom wall 12b of the inner wall portion 12. Further, an injection hole 11d for filling the foamed resin can be formed in the bottom wall 11b of the outer wall portion 11. The injection hole 11d can be formed in advance, for example, when the outer wall portion 11 is molded.

FIG. 4B is an explanatory view of the in-mold placement step S12 and the foamed resin filling step S13 shown in FIG. In the in-mold placement step S12, the outer wall portion 11 and the inner wall portion are arranged in a state where the inner wall portion 12 to which the vacuum heat insulating material 32 for the bottom wall is joined is arranged inside the outer wall portion 11 to which the vacuum heat insulating material 31 for the side wall is joined. This is a step of arranging the 12 and the mold D in the mold D.

In the foamed resin filling step S13, for example, the resin material is filled between the outer wall portion 11 and the inner wall portion 12 arranged in the mold D through the injection hole 11d of the bottom wall 11b of the outer wall portion 11 and foamed. This is a step of forming the foamed resin material 40. By this step, the foamed resin material 40 can be joined to the outer wall portion 11 and the inner wall portion 12. Further, after the foamed resin material 40 is formed, the injection hole 11d can be closed by welding, for example, a plug to the injection hole 11d of the outer wall portion 11.

FIG. 4C is an explanatory view of the container joining step S14 shown in FIG. The container joining step S14 is a step of joining the outer wall portion 11 and the inner wall portion 12 taken out from the mold D to obtain the container main body 10. Specifically, for example, by heat welding, the peripheral edge of the flange portion 12a of the inner wall portion 12 and the upper end portion of the side wall 11c of the outer wall portion 11 are joined over the entire circumference, and the outer wall portion 11 and the inner wall portion 12 are integrated. .. From the above, the container body 10 of the heat insulating container 100 shown in FIG. 1 can be obtained. The lid portion 20 shown in FIG. 1 can be manufactured in the same manner as the container body 10 by the same process as the manufacturing method M1.

FIG. 5 is a flow chart showing another example of the method for manufacturing the heat insulating container 100 shown in FIG. This manufacturing method M2 can include, for example, a foamed resin molding step S21, a heat insulating material joining step S22, a container arranging step S23, and a container joining step S24.

FIG. 6A is an explanatory view of the foamed resin molding step S21 shown in FIG. The foamed resin molding step S21 is a step of molding the foamed resin material 40 that fills the space between the outer wall portion 11 and the inner wall portion 12 constituting the container body 10. More specifically, a foamed resin material 40 having a shape corresponding to the shape of the space between the outer wall portion 11 and the inner wall portion 12 is molded by using a molding die (not shown). In this step, a recess 41 for accommodating the vacuum heat insulating material 31 for the side wall is formed on the outer surface of the side wall of the foamed resin material 40, and a recess 42 for accommodating the vacuum heat insulating material 32 for the bottom wall is formed on the upper surface of the bottom wall of the foamed resin material 40. Can be formed.

FIG. 6B is an explanatory view of the heat insulating material joining step S22 shown in FIG. The heat insulating material joining step S22 is a step of joining the vacuum heat insulating material 30 to the foamed resin material 40. The vacuum heat insulating material 30 can be joined to the recesses 41 and 42 of the foamed resin material 40 after molding via an adhesive, for example. Further, in the foamed resin molding step S21 described above, the vacuum heat insulating material 30 may be arranged in the molding die, and the foamed resin material 40 and the vacuum heat insulating material 30 may be joined together with the molding of the foamed resin material 40. In this case, the foamed resin molding step S21 and the heat insulating material joining step S22 can be completed at the same time.

FIG. 6C is an explanatory view of the container arranging step S23 and the container joining step S24 shown in FIG. The container arranging step S23 is a step of arranging the foamed resin material 40 to which the vacuum heat insulating material 30 is bonded inside the outer wall portion 11 and arranging the inner wall portion 12 inside the foamed resin material 40. As a result, the foamed resin material 40 is arranged so as to fill the space between the outer wall portion 11 and the inner wall portion 12, and the vacuum heat insulating material 31 for the side wall is arranged adjacent to the side wall 11c of the outer wall portion 11 to form the bottom wall. The vacuum heat insulating material 32 for use can be arranged adjacent to the bottom wall 12b of the inner wall portion 12.

The container joining step S24 is a step of joining the outer wall portion 11 and the inner wall portion 12 to obtain the container main body 10. Specifically, for example, by heat welding, the peripheral edge of the flange portion 12a of the inner wall portion 12 and the upper end portion of the side wall 11c of the outer wall portion 11 are joined over the entire circumference, and the outer wall portion 11 and the inner wall portion 12 are integrated. .. From the above, the container body 10 of the heat insulating container 100 shown in FIG. 1 can be obtained. The lid portion 20 shown in FIG. 1 can be manufactured in the same manner as the container body 10 by the same process as the manufacturing method M2.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and there are design changes and the like within a range not deviating from the gist of the present invention. Also, they are included in the present invention.

Hereinafter, examples of the heat insulating container of the present invention and comparative examples as comparison targets thereof will be described.

[Example]
FIG. 7 is a schematic cross-sectional view of the heat insulating container 100A according to the embodiment of the present invention. As the heat insulating container 100A of the embodiment, a heat insulating container 100A having the same configuration as the heat insulating container 100 of the above-described embodiment shown in FIG. 1 was prepared except that the lid 20 does not have the vacuum heat insulating material 30. The dimensions of the vacuum heat insulating material 31 for the side wall arranged along the longitudinal direction of the container body 10 were 340 mm × 150 mm × 15 mm. The dimensions of the vacuum heat insulating material 31 for the side wall arranged along the lateral direction of the container body 10 were 275 mm × 150 mm × 15 mm. The dimensions of the vacuum heat insulating material 32 for the bottom wall were 340 mm × 150 mm × 15 mm.

As each vacuum heat insulating material 30, those having a thermal conductivity of 0.002 W / (m · K) or more and 0.006 W / (m · K) or less were used. Further, as the foamed resin material 40, a material having a thermal conductivity of 0.02 W / (m · K) or more and 0.08 W / (m · K) or less was used. Further, polypropylene is used as the material of the outer wall portion 11 and the inner wall portion 12 of the container body 10 and the upper wall portion 22 and the lower wall portion 21 of the lid portion 20, and the thickness thereof is in the range of about 1 mm to about 2.5 mm. did.

[Comparison example]
FIG. 8 is a schematic cross-sectional view of the heat insulating container 100Z according to the comparative example. As the heat insulating container 100Z of the comparative example, the vacuum heat insulating material 31 for the side wall is arranged adjacent to the side wall 12c of the inner wall portion 12, and the vacuum heat insulating material 32 for the bottom wall is arranged adjacent to the bottom wall 11b of the outer wall portion 11. A heat insulating container 100Z having the same configuration as the heat insulating container 100A of the embodiment shown in FIG. 7 was prepared. The vacuum heat insulating material 31 for each side wall of the heat insulating container 100Z of Comparative Example 1 is arranged inside the container body 10 as compared with the vacuum heat insulating material 31 for each side wall of the heat insulating container 100A of Example 1. Therefore, the size of the vacuum heat insulating material 31 for each side wall of the heat insulating container 100Z of Comparative Example 1 is about 10% smaller than that of the vacuum heat insulating material 31 for each side wall of the heat insulating container 100A of Example 1.

[Insulation test]
A heat insulating property test was conducted to compare the heat insulating property of the heat insulating container 100A of the example with the heat insulating property of the heat insulating container 100Z of the comparative example. Specifically, each of the heat insulating containers 100A and 100Z contained two containers C each containing 2 L of water at about 25 ° C. and a thermometer for measuring the temperature of the water in the container C. Then, each of the heat insulating containers 100A and 100Z was left in an environment where the air temperature was 5 ° C. for 10 hours, and the temperature of the water in the container C was measured.

FIG. 9 is a graph showing the results of heat insulation tests of heat insulating containers 100A and 100Z of Examples and Comparative Examples, where the horizontal axis is time [h] and the vertical axis is water temperature [° C.]. As shown in FIG. 9, in the heat insulating container 100Z of the comparative example, the temperature of the water in the container C after 10 hours decreased by about 6 ° C. or more to less than 19 ° C. On the other hand, in the heat insulating container 100A of the example, the decrease in the temperature of the water in the container C after 10 hours could be suppressed to about 5 ° C., and the temperature of the water could be maintained at about 20 ° C. .. From the above results, it was clarified that the heat insulating container 100A of the example has higher heat insulating property than the heat insulating container 100Z of the comparative example.

10 Container body 10a Opening 10d Square part 10e Buffer part 11 Outer wall part 11c Side wall 11e Inner corner 12 Inner wall part 12b Bottom wall 12d Outer corner 20 Lid part 21 Lower wall part 22 Upper wall part 30 Vacuum heat insulating material 31 Vacuum for side wall Insulation material 32 Vacuum heat insulating material for bottom wall 33 Vacuum heat insulating material for lid 40 Foamed resin material 50 Foamed resin material 100 Insulation container 100A Insulation container

Claims (8)

A heat-insulating container for transportation provided with a container body and a lid portion that closes an opening of the container body.
The container body is between an outer wall portion made of a rigid non-foaming resin, an inner wall portion made of the non-foaming resin arranged inside the outer wall portion, and the inner wall portion and the outer wall portion. With vacuum heat insulating material placed in
The vacuum insulation material is seen containing a vacuum heat insulating material for the side wall positioned adjacent to the side wall of the outer wall portion, and a vacuum heat insulating material for arranged bottom wall adjacent the bottom wall of the inner wall portion,
A heat insulating container for transportation, which comprises a foamed resin material that covers the inner surface of the outer wall portion and the vacuum heat insulating material . The container body has a rectangular box shape and has a rectangular box shape.
The peripheral edge portion of the vacuum heat insulating material for the side wall is arranged inside the peripheral edge portion of the side wall portion of the outer wall portion.
Wherein the corner portion of the container body, transport insulated container according to claim 1, wherein a buffer unit for the side wall for the vacuum heat insulating material is not arranged is formed. The heat insulating container for transportation according to claim 2 , wherein the cushioning portion is formed between an inner corner of the outer wall portion and an outer corner of the inner wall portion. The heat insulating container for transportation according to any one of claims 1 to 3 , wherein the space between the outer wall portion and the inner wall portion is filled with a foamed resin material. The upper edge portion, the lower edge portion and the left and right side edge portions of the vacuum heat insulating material for the side wall are arranged inside the upper edge portion, the lower edge portion and the left and right side edge portions of the side wall, respectively. The heat insulating container for transportation according to any one of claims 1 to 4 , which is characteristic. The lid portion includes a lower wall portion that covers the opening of the container body, an upper wall portion joined to the upper side of the lower wall portion, and the upper wall portion between the upper wall portion and the lower wall portion. The transport heat insulating container according to any one of claims 1 to 5 , further comprising a vacuum heat insulating material for a lid portion arranged adjacent to the portion. The heat insulating container for transportation according to claim 6 , further comprising a foamed resin material that fills a space between the upper wall portion and the lower wall portion. The heat insulating container for transportation according to claim 6 or 7 , wherein the material of the upper wall portion and the lower wall portion is a non-foamed resin material.

Images