JP2018108851A - Adiabatic container - Google Patents

Abstract

A heat-insulating container capable of more reliably protecting a vacuum heat-insulating material from external shocks and improving heat-insulating properties is provided. A heat insulating container (100) comprising a container body (10) and a lid (20) closing an opening (10a) of the container body (10). The container body 10 includes a rigid outer wall portion 11, an inner wall portion 12 arranged inside the outer wall portion 11, and a vacuum heat insulating material 30 arranged between the inner wall portion 12 and the outer wall portion 11. . The vacuum heat insulating material 30 includes a side wall vacuum heat insulating material 31 arranged adjacent to the side wall 11 c of the outer wall portion 11 . [Selection drawing] Fig. 1

Description

  The present invention relates to an insulated container.

  Conventionally, a heat insulating container including a heat insulating container main body and a heat insulating opening / closing lid that opens and closes the upper end opening of the container main body is known (see Patent Document 1 below). In the heat insulating container described in Patent Document 1, the lower end of the cylindrical body portion formed in a substantially square cross section 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 on the upper end portion of the container main body so as to be raised and lowered.

  The cylindrical body portion of the container body includes a front wall portion and a rear wall portion that are opposed to each other in the front-rear direction, and left and right side wall portions that are opposed to 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 open / close lid portion of the container body include a triple heat insulating layer. This triple heat insulating layer is composed of a central heat insulating layer formed of a flat vacuum heat insulating material, and an inner heat insulating layer and an outer heat insulating layer formed of a flat heat insulating board provided by polymerization on both surfaces of the central heat insulating layer. It consists of The inner heat insulating layer of the bottom lid portion is configured to fit and fit into the lower end portion of the cylindrical body portion, and the inner heat insulating layer of the open / close lid portion is formed at the upper end opening of the container body when the lid is closed. It is configured to fit in.

  With this configuration, it exhibits an excellent heat insulation effect 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 polymerized on both sides of the vacuum heat insulating material, and Patent Document 1 describes that when the vacuum heat insulating material is damaged, the heat insulating action becomes substantially zero or close to zero (see, for example, the same document, paragraphs 0011 to 0016).

JP2013-10524A

  The said patent document 1 is disclosing the structure provided with the bag which accommodates the heat insulation container body in which the container main body was comprised with the trunk | drum and bottom cover part of the heat insulation layer of a 3 layer structure. This bag is made of, for example, an aluminum vapor-deposited sheet in which aluminum is vapor-deposited on one side of a fiber sheet, so that it is soft and flexible and does not have sufficient rigidity. Moreover, in the heat insulation layer of the three-layer structure of the heat insulation container body accommodated in the bag, a material having a relatively low strength such as a foamed resin material is used as the heat insulation board constituting the inner and outer heat insulation layers. It is described in.

  Therefore, in the said conventional heat insulation container, there exists a possibility that a vacuum heat insulating material may be damaged with a heat insulation board with the impact from the outside, and a heat insulation effect may lose | disappear. In addition, if the insulation board that forms the outer insulation layer is made thicker to protect the vacuum insulation material from external impacts, the installation area of the vacuum insulation material with respect to the area of the outer surface of the insulation container is reduced, and heat is applied to the insulation container from the outside. May be 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 thereof is to provide a heat insulating container that can more reliably protect a vacuum heat insulating material from an external impact and can improve 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 including a container main body and a lid portion that closes the opening of the container main body, and the container main body includes a rigid outer wall portion and An inner wall portion disposed inside the outer wall portion, and a vacuum heat insulating material disposed between the inner wall portion and the outer wall portion, wherein the vacuum heat insulating material is adjacent to a side wall of the outer wall portion. It is characterized by including a vacuum insulating material for the arranged side wall.

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

  The rigidity of the outer wall portion is the difficulty of deformation of the outer wall portion with respect to the force acting on the outer wall portion from the outside. From the viewpoint of preventing breakage of the vacuum heat insulating material, the outer wall portion preferably has rigidity higher than that of the vacuum heat insulating material. Moreover, it is preferable that the outer wall part 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, for example, a core material such as glass wool is covered with an exterior material such as a laminate film, and the interior of the exterior material is evacuated. By disposing such a side wall vacuum heat insulating material adjacent to the side wall of the outer wall portion, the installation area of the side wall vacuum heat insulating material can be increased as much as possible with respect to the surface area of the outer surface of the container body. The movement of heat through the side wall can be blocked in a wider range than before. Therefore, according to the heat insulation container of this invention, heat insulation can be improved rather than the conventional heat insulation container.

  Here, arranging the vacuum heat insulating material for side walls adjacent to the side wall of the outer wall includes the following cases. For example, when the side wall vacuum heat insulating material is bonded to the side wall of the outer wall part via an adhesive, when arranged in contact with the side wall of the outer wall part, and with a slight gap from the side wall of the outer wall part. This is a case where they are arranged to face each other. In addition, the clearance gap between the vacuum heat insulating material for side walls and the side wall of an outer wall part can be 1 mm or less or 2 mm or less, for example. By having such a gap, for example, when an external impact is applied to the outer wall portion, the impact can be mitigated, and damage to the side wall vacuum heat insulating material can be prevented.

  The said heat insulation container may be provided with the foamed resin material which covers the inner surface of the said outer wall part, and the said vacuum heat insulating material. When the inner wall portion and the foamed resin material are separate 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. Moreover, when the said inner wall part is the said foamed resin material, the heat insulation of a heat insulation container can be improved with the inner wall part which consists of this foamed resin material. In any case, the vacuum heat insulating material can be supported by the foamed resin material, and the vacuum heat insulating material can be prevented from being damaged. Therefore, the vacuum heat insulating material can be more reliably protected from 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 side wall vacuum heat insulating material is disposed inside the peripheral edge portion of the side wall of the outer wall portion. The buffer part in which the vacuum heat insulating material for side walls is not arrange | positioned may be formed. Thereby, when the corner | angular part of the said outer wall part which comprises the said container main body collides with an obstruction, for example, it can prevent that an impact is added to the said vacuum heat insulating material for side walls. Therefore, breakage of the vacuum heat insulating material for side walls can be prevented more effectively.

  The buffer portion may be formed between an inner corner of the outer wall portion and an outer corner of the inner wall portion. For example, the buffer portion can be formed on a diagonal line of the rectangular container body in a plan view as viewed from a direction perpendicular to the bottom wall of the container body. Thereby, even if an impact is applied to the outer corner of the outer wall portion of the container body, and the interval between the inner corner of the outer wall portion and the outer corner of the inner wall portion is narrowed, the shock is reduced by the buffer portion, Damage to the vacuum heat insulating material for the side wall can be prevented more reliably.

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

  The said vacuum heat insulating material may contain the vacuum heat insulating material for bottom walls arrange | positioned adjacent to the bottom wall of the said inner wall part. In this case, the movement of heat between the inside and the outside of the container body via 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 separately 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 into 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 includes a lower wall covering the opening of the container body, an upper wall joined to the upper side of the lower wall, and the upper wall between the upper wall and the lower wall. You may have the vacuum heat insulating material for lid | covers arrange | positioned adjacent to the part.

  Thus, the vacuum heat insulating material for the lid part is arranged adjacent to the upper wall part, so that the vacuum heat insulating material for the lid part is compared with the case where the vacuum heat insulating material for the lid part is arranged adjacent to the lower wall part. The material can be arranged in a wider area close to the area of the outer surface of the lid. Therefore, the heat insulation between the inside and the outside of the heat insulating container through the upper wall part of the cover part is more effectively blocked by the vacuum heat insulating material for the cover part, and the heat insulating property of the heat insulating container is further improved. Can do.

  You may provide the foamed resin material which fills the space between the said upper wall part and the said lower wall part. With this foamed resin material, heat transfer 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. Moreover, the vacuum heat insulating material for lid | cover parts can be supported by a foamed resin material, and damage to the vacuum heat insulating material for lid | cover parts can be prevented. Therefore, the vacuum heat insulating material for lids can be more reliably protected from external impacts, 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. Moreover, the said upper wall part and the said lower wall part can be joined and integrated by heat welding, for example.

  ADVANTAGE OF THE INVENTION According to this invention, the heat insulation container which can protect a vacuum heat insulating material from an external impact more reliably, and can improve heat insulation can be provided.

Sectional drawing of the heat insulation container which concerns on one Embodiment of this invention. Sectional drawing which follows the II-II line | wire of the heat insulation container shown in FIG. The flowchart which shows an example of the manufacturing method of the heat insulation container shown in FIG. Explanatory drawing of the heat insulating material joining process shown in FIG. Explanatory drawing of the in-mold arrangement | positioning process and foaming resin filling process which are shown in FIG. Explanatory drawing of the container joining process shown in FIG. The flowchart which shows another example of the manufacturing method of the heat insulation container shown in FIG. Explanatory drawing of the foaming resin molding process shown in FIG. Explanatory drawing of the heat insulating material joining process shown in FIG. Explanatory drawing of the container arrangement | positioning process and container joining process shown in FIG. The typical sectional view of the heat insulation container concerning the example of the present invention. The typical sectional view of the heat insulation container concerning 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 a heat insulating container according to the present invention will be described with reference to the drawings.

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

  The heat insulation container 100 of this embodiment is provided with the container main body 10 which has heat insulation, for example, and the cover part 20 which has heat insulation which obstruct | occludes the opening part 10a of the upper part of this container main body.

  The container body 10 is formed, for example, in a rectangular box shape having a generally rectangular parallelepiped shape as a whole. The container body 10 has a generally rectangular plate-like bottom wall 10b and side walls 10c erected on each side of the bottom wall 10b, and the upper part is open. That is, the container body 10 has a generally rectangular opening 10a defined by the side wall 10c at the upper end. In addition, the shape of the container main body 10 is not specifically limited, For example, it can form in arbitrary shapes, such as cylindrical shape, elliptic cylinder shape, and polygonal column 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-foamed resin that is the material of the outer wall portion 11, for example, a polyolefin-based resin such as polyethylene or polypropylene can be used. The outer wall portion 11 has a thickness of 0.5 mm or more and 5 mm or less, for example, and has a certain rigidity and mechanical strength. For example, the rigidity and mechanical strength of the outer wall portion 11 are higher than 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 disposed inside the outer wall portion 11. The inner wall portion 12 is made of, for example, the same material as that of the outer wall portion 11. In the illustrated example, the inner wall portion 12 has a flange portion 12a at the upper end portion. The flange portion 12 a protrudes from the upper end portion of the inner wall portion 12 toward the outside of the opening portion 10 a of the container body 10. The peripheral edge part of the flange part 12a is joined to the upper end part of the outer wall part 11 over the perimeter, for example by 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 deposited, and the inside of the exterior material is evacuated. The vacuum heat insulating material 30 is disposed in a 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 includes 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 insulation container 100 of this embodiment is provided with the some vacuum heat insulating material 30, for example. The vacuum heat insulating material 30 can include, for example, a side wall vacuum heat insulating material 31 and a bottom wall vacuum heat insulating material 32. The vacuum heat insulating material 30 does not necessarily need to include the bottom wall vacuum heat insulating material 32, but preferably includes the bottom wall vacuum heat insulating material 32 from the viewpoint of improving the heat insulating property of the heat insulating container 100. The heat insulating container 100 of the present embodiment includes a side wall vacuum heat insulating material 31 and a bottom wall vacuum heat insulating material 32 in the container main body 10 as the vacuum heat insulating material 30.

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

  Similarly to the side wall vacuum heat insulating material 31, the bottom wall vacuum heat insulating material 32 is bonded to the bottom wall 12b of the inner wall portion 12 via an adhesive, for example. Further, the bottom wall vacuum heat insulating material 32 may be supported, for example, in contact with the bottom wall 12b of the inner wall portion 12 as in the case of the side wall vacuum heat insulating material 31, for example, about 0.1 mm to 2 mm. You may arrange | position facing the bottom wall 12b of the inner wall part 12 through a micro clearance gap.

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

  For example, 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, or may be fitted 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 part 11 and the inner wall part 12 and having a predetermined negative dimensional tolerance and is in contact with the outer wall part 11 and the inner wall part 12. Or you may oppose these through a micro clearance gap. Furthermore, 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, the container body 10 is disposed adjacent to the outer wall part 11 between the outer wall part 11 and the inner wall part 12 of the container body 10. The peripheral edge portion of the side wall vacuum heat insulating material 31 can be arranged inside the peripheral edge portion of the side wall 11 c of the outer wall portion 11. Thereby, the buffer part 10e in which the side wall vacuum heat insulating material 31 is not arranged is formed in the corner part 10d of the container body 10. Here, the corner 10d of the container body 10 is a pointed 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 buffer portion 10 e of the corner portion 10 d of the container body 10 is formed between, for example, the corner 11 e inside the outer wall portion 11 of the container body 10 and the corner 12 d outside the inner wall portion 12. Also good. Moreover, the buffer part 10e can be formed on the diagonal DL of the rectangular container main body 10 by the planar view seen from the direction perpendicular | vertical to the bottom wall 10b of the container main body 10, for example. An inner corner 11e of the outer wall 11 extends from the bottom wall 11b of the outer wall 11 shown in FIG. 1 to the upper end of the side wall 11c of the outer wall 11 along a direction perpendicular to the bottom wall 11b. Similarly, the outer corner 12d of the inner wall 12 extends from the bottom wall 12b of the inner wall 12 shown in FIG. 1 to the upper end of the side wall 12c of the inner wall 12 along a direction perpendicular to the bottom wall 12b. ing.

Moreover, 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 part 10e with respect to the inner dimension H1 of the outer wall part 11 satisfies, for example, the following formula (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, Expressions (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 inner dimension H2 of the buffer portions 10e formed at both ends of the side wall 11c of the outer wall portion 11 is the outer wall portion. 11 is preferably 4% or more and 15% or less of the inner dimension H1 in the height direction. In addition, as shown in FIG. 2, in the plane cross section along the bottom wall 10 b of the container body 10, the total inner dimension L <b> 3 of the buffer portion 10 e formed at both ends of the side wall 11 c along the vertical direction of the rectangular outer wall portion 11. Is preferably 4% or more and 15% or less of the inner dimension L1 in the longitudinal direction of the outer wall portion 11. In addition, the sum of the inner dimensions L4 of the buffer portions 10e formed at both ends of the side wall 11c along the lateral direction of the rectangular outer wall portion 11 in a plan view perpendicular to the bottom wall 10b of the container body 10 is the It is preferably 4% or more and 15% or less of the inner dimension L2 in the horizontal 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 that is joined to the upper side of the lower wall portion 21, and the upper wall portion 22 and the lower wall portion 21. And the lid vacuum heat insulating material 33 disposed adjacent to the upper wall portion 22. The lid portion 20 is formed in a flat plate shape and can have a convex portion that engages with the opening 10 a of the container body 10. The material of the upper wall part 22 and the lower wall part 21 can use the non-foamed resin material similar to the outer wall part 11 and the inner wall part 12 of the container body 10 described above.

  Moreover, as the vacuum heat insulating material 33 for lid | cover parts, the thing similar to the vacuum heat insulating material 30 of the above-mentioned container main body 10 can be used. The lid 20 may be manufactured by simultaneously integrally molding the lower wall 21 and the upper wall 22 by, for example, blow molding. In this case, the lid 20 may not have the lid vacuum heat insulating material 33 inside.

  The vacuum insulating material 33 for lid | cover part is joined to the upper wall part 22, for example via the adhesive agent similarly to the vacuum insulating material 31 for side walls mentioned above. Moreover, the vacuum insulating material 33 for lid | cover parts may be supported in the state which contact | connected the upper wall part 22, for example like the vacuum insulating material 31 for side walls, for example, a micro clearance gap of about 0.1 mm to 2 mm It may be arranged to face the upper wall portion 22 via

  The lid 20 may include a foamed resin material 50 that fills the space between the upper wall portion 22 and the lower wall portion 21 as in the case of 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. And the lower wall portion 21 may be fitted tightly. In the latter case, the foamed resin material 50 is set to a thickness corresponding to the dimension between the upper wall part 22 and the lower wall part 21 and having a predetermined negative dimensional tolerance, and the upper wall part 22 and the lower wall part 21 may be in contact with or opposed to each other through a minute gap.

  Hereinafter, the effect | action of the heat insulation container 100 of this embodiment is demonstrated.

  The heat insulating container 100 of the present embodiment stores, for example, an article that needs to be kept warm or cold through the opening 10 a of the container body 10 in the container body 10 and closes the opening 10 a of the container body 10 with the lid 20. Thus, it is possible to insulate the internal space in which the article is housed from the surrounding environment.

  Articles accommodated in the heat insulating container 100 include, for example, soft drinks, confectionery, seafood such as fresh fish, processed foods such as ham and sausage, dairy products such as various carcasses and meat, cheese, vaccines and ampoules, etc. Many of them are relatively heavy, such as pharmaceuticals, cooked rice, side dishes, and fruits and vegetables. When an article having a large weight is accommodated in the heat insulating container 100, for example, when the heat insulating container 100 is dropped or hit against an obstacle, an impact acting on the heat insulating container 100 from the outside tends to increase. Therefore, the heat insulating container 100 is required to have high impact resistance, durability, and buffering properties.

  Here, in the heat insulating container 100 of the present embodiment, the container body 10 includes a rigid outer wall part 11, an inner wall part 12 disposed inside the outer wall part 11, and the inner wall part 12 and the outer wall part 11. And a vacuum heat insulating material 30 disposed therebetween. The vacuum heat insulating material 30 includes a side wall vacuum heat insulating material 31 disposed adjacent to the side wall 11 c of the outer wall portion 11. In other words, the container body 10 includes the side wall vacuum heat insulating material 31 disposed adjacent to the side wall 11 c of the outer wall portion 11 as the vacuum heat insulating material 30.

  Thus, for example, even when an obstacle collides with the heat insulating container 100 and an impact is applied to the container main body 10 from the outside during transportation of the heat insulating container 100, the impact is reduced by the rigid outer wall portion 11, and vacuum is applied. The heat insulating material 30 can be protected and damage can be prevented. Furthermore, 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 when the heat insulating container 100 is transported or stored.

  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 side wall vacuum heat insulating material 31 is disposed 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 enlarge the installation area of the vacuum heat insulating material 31 for side walls. This is because the surface area of the side wall 11c of the outer wall part 11 is larger than the surface area of the side wall 12c of the inner wall part 12.

  Thus, by expanding the installation area of the vacuum heat insulating material 31 for the side wall as compared with the prior art, the vacuum heat insulating material 31 for the side wall allows the space between the inside and the outside of the container main body 10 through the side wall 11c of the outer wall portion 11. 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 external impact than the conventional heat insulating container 100, and the heat insulating property can be improved.

  Further, as described above, when the side wall vacuum heat insulating material 31 is joined to or in contact with the side wall 11c of the outer wall portion 11, the heat transmitted to the inside of the container body 10 through the side wall 10c of the container body 10 is reduced. The transmission path is as follows. First, the heat of the outside air is transmitted to the side wall 11 c of the outer wall portion 11 of the container body 10. Further, heat is transferred from the side wall 11 c of the outer wall portion 11 to the inside of the container body 10 sequentially through the side wall vacuum heat insulating material 31, the foamed resin material 40, and the side wall 12 c 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 / for the vacuum heat insulating material 30. About (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 12 is about the same as the outer wall 11. In this way, the side wall vacuum heat insulating material 31 is disposed 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 heat transfer can be effectively cut off on the side, and the heat insulation of the container body 10 can be improved.

  More specifically, the heat transmitted from the side wall 11c of the outer wall portion 11 to the foamed resin material 40 between the outer wall portion 11 and the inner wall portion 12, air, or the like is blocked by the side wall vacuum heat insulating material 31, thereby allowing the foamed resin. Heat transmitted to the inner wall portion 12 through the material 40 and air can be reduced. Therefore, a higher heat insulating effect can be obtained in the container body 10. Further, condensation on the outer surface of the container body 10 can be prevented.

  Furthermore, the container body 10 may have a gap between the side wall 11c of the outer wall portion 11 and the side wall vacuum heat insulating material 31. In this case, a heat insulating layer is formed by the air between the side wall 11 c of the outer wall portion 11 and the side wall vacuum heat insulating material 31. The thermal conductivity of air is, for example, about 0.026 W / (m · K), and is lower than the thermal conductivity of the outer wall portion 11. Therefore, the heat transmitted from the outer wall portion 11 to the side wall vacuum heat insulating material 31 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 bottom wall vacuum heat insulating material 32 in which the vacuum heat insulating material 30 is disposed adjacent to the bottom wall 12b of the inner wall portion 12. In other words, the container body 10 includes the bottom wall vacuum heat insulating material 32 disposed adjacent to the bottom wall 12 b of the inner wall portion 12 as the vacuum heat insulating material 30.

  The bottom wall vacuum heat insulating material 32 can suppress heat transfer between the inside and the outside of the container main body 10 via 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 bottom wall vacuum heat insulating material 32 prevents, for example, the heat of an article housed in the heat insulating container 100 from being transmitted from the bottom wall 12b of the inner wall portion 12 to the bottom wall 11b of the outer wall portion 11. In addition, the heat of the article can be prevented from escaping to the outside, and the article can be effectively kept warm.

  More specifically, the article accommodated in the heat insulating container 100 is disposed on the bottom wall 12 b of the inner wall portion 12 of the container body 10. Therefore, the heat transfer path from the article requiring heat insulation to the outside of the heat insulating container 100 includes 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 11 b of the outer wall portion 11. However, by disposing the bottom wall vacuum heat insulating material 32 adjacent to the bottom wall 12 b of the inner wall portion 12, the heat transferred from the article accommodated in the heat insulating container 100 to the bottom wall 12 b of the inner wall portion 12. And being transmitted to the foamed resin material 40 or the air between the outer wall portion 11 and the outer wall portion 11 can be suppressed.

  On the other hand, heat is finally transmitted from the bottom wall 12b of the inner wall portion 12 to the article that needs to be kept in the cold in the heat insulating container 100. Therefore, by disposing the bottom wall vacuum heat insulating material 32 adjacent to the bottom wall 12b of the inner wall part 12, the bottom wall 11b of the outer wall part 11 and the foamed resin material 40 between the outer wall part 11 and the inner wall part 12 or Heat transmitted to the bottom wall 12b of the inner wall portion 12 through the air can be blocked. Therefore, the heat transmitted 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 insulation of the container body 10 can be improved.

  Further, when an article having a temperature higher than the outside air temperature is accommodated inside the heat insulating container 100, the heat transmitted from the inner wall portion to the outer wall portion 11 is blocked by the vacuum heat insulating material 30, thereby reducing the temperature of the inner wall portion 12. Can be suppressed, and condensation on the inner surface of the heat insulating container 100 can be prevented. In this case, by disposing the bottom wall vacuum heat insulating material 32 adjacent to the bottom wall 12 b of the inner wall portion 12, the heat of the bottom wall 12 b of the inner wall portion 12 causes 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 air, suppress the temperature drop of the bottom wall 12b of the inner wall portion 12, and more effectively prevent the condensation on the inner surface of the bottom wall 12b.

  In addition, when an article having a temperature lower than the outside air temperature is accommodated inside the heat insulating container 100, heat transmitted 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. Thereby, the temperature fall of the outer wall part 11 can be suppressed, and the dew condensation of the outer surface of the heat insulation container 100 can be prevented. In this case, by disposing the side wall vacuum heat insulating material 31 adjacent to the side wall 11c of the outer wall part 11, the heat of the side wall 11c of the outer wall part 11 causes the foamed resin material 40 between the outer wall part 11 and the inner wall part 12 or Propagation to air is effectively suppressed, and condensation on the inner surface of the side wall 11c of the outer wall portion 11 can be more effectively prevented.

  Further, in the heat insulating container 100 of the present embodiment, the vacuum insulating material 32 for the bottom wall of the container body 10 is disposed adjacent to the bottom wall 12b of the inner wall portion 12 as described above. Thereby, the vacuum heat insulating material 32 for the bottom wall of the container main body 10 can be arranged separately from the bottom wall 11 b 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 main body 10, and the injection hole 11d is interposed 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 bottom wall vacuum heat insulating material 32 can be prevented from interfering with the process.

  Moreover, the heat insulation container 100 of this embodiment is provided with the foamed resin material 40 which covers the inner surface of the outer wall part 11 of the container main body 10 and the vacuum heat insulating material 30 as mentioned above. In this case, the foamed resin material 40 of the container main body 10 can suppress the movement of heat between the outer wall portion 11 and the inner wall portion 12 of the container main body 10 and improve the heat insulating property of the heat insulating container 100. Moreover, the vacuum heat insulating material 30 of the container main body 10 can be supported by the foamed resin material 40 of the container main body 10 to prevent breakage. 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 external impacts and improve the heat insulating property of the heat insulating container 100. Can be made.

  Further, in the heat insulating container 100 of the present embodiment, the container body 10 has a rectangular box shape as described above. And the peripheral part of the vacuum heat insulating material 31 for side walls is arrange | positioned inside the peripheral part of the side wall 11c of the outer wall part 11 which comprises the container main body 10. FIG. And the buffer part 10e in which the vacuum heat insulating material 31 for side walls is not arrange | positioned is formed in the corner | angular part 10d of the container main body 10. FIG. Thereby, when the obstacle collides with the corner | angular part 10d of the container main body 10, for example at the time of transport of the heat insulation container 100, it can prevent that an impact is added to the vacuum heat insulating material 31 for side walls. Therefore, according to the heat insulation container 100 of this embodiment, damage to the side wall vacuum heat insulating material 31 can be more effectively prevented.

  Further, as described above, in the heat insulating container 100 of the present embodiment, the buffer portion 10e of the corner portion 10d of the container body 10 has the corner 11e inside the outer wall portion 11 of the container body 10 and the corner 12d outside the inner wall portion 12. Is formed between. Thereby, for example, an impact is applied to the corner 10 d of the container body 10, that is, the outer corner of the outer wall portion 11, and the portion in the vicinity of the inner corner 11 e of the outer wall portion 11 and the portion in the vicinity of the outer corner 12 d of the inner wall portion 12. Even if the distance between the two is narrowed, the shock is mitigated by the buffer portion 10e, and the side wall vacuum heat insulating material 31 can be more reliably prevented from being damaged. In addition, since the vacuum heat insulating material 30 cannot be visually recognized from the outside of the heat insulating container 100, it is extremely important that the vacuum heat insulating material 30 is protected from the external impact and is not damaged as described above.

  Further, as described above, the heat insulation container 100 of the present embodiment has the inner dimensions H1, L1, L2 of the outer wall portion 11 of the container body 10 and the inner dimensions H2, L3, L4 of the buffer portion 10e as described in the above formula (1). To (3). Thereby, not only can the shocks be mitigated by the buffering portion 10e to prevent the side wall vacuum heat insulating material 31 from being damaged more reliably, but the installation area of the side wall vacuum heat insulating material 31 can be secured to insulate the heat insulating container 100. Can be improved.

  Moreover, as for the heat insulation container 100 of this embodiment, the raw material of the outer wall part 11 and the inner wall part 12 of the container main body 10 is a non-foaming resin material as mentioned above. In this case, desired rigidity and mechanical strength can be imparted to the outer wall portion 11 and the inner wall portion 12. Moreover, the outer wall part 11 and the inner wall part 12 can be integrated by joining, for example by heat welding. Further, by making the material of the outer wall portion 11 and the inner wall portion 12 of the container main body 10 into a non-foamed resin material, the impact resistance and durability of the heat insulating container 100 can be improved, and it can be repeatedly used after being cleaned. become. Furthermore, 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 insulation properties and strength of the container body 10 are further improved by the heat insulation properties and elasticity of the foam resin material 40. Is possible.

  Further, as described above, in the heat insulating container 100 of the present embodiment, the lid part 20 covers the lower wall part 21 covering the opening part 10a of the container body 10 and the upper wall joined to the upper side of the lower wall part 21. And a lid vacuum heat insulating material 33 disposed adjacent to the upper wall portion 22 between the upper wall portion 22 and the lower wall portion 21. As described above, the lid heat insulating material 33 is disposed adjacent to the upper wall portion 22, so that the lid vacuum heat insulating material 33 is disposed adjacent to the lower wall portion 21. The part vacuum heat insulating material 33 can be arranged in a wider area close to the area of the outer surface of the lid part 20. Therefore, the heat transfer between the inside and the outside of the heat insulating container 100 via the upper wall portion 22 of the cover 20 is more effectively suppressed by the vacuum heat insulating material 33 for the cover, and the heat insulating property of the heat insulating container 100 is improved. Can be further improved.

  Moreover, the heat insulation container 100 of this embodiment is provided with the foamed resin material 50 with which the cover part 20 fills the space between the upper wall part 22 and the lower wall part 21, as mentioned above. With the foamed resin material 50 of the lid portion 20, the heat transfer between the lower wall portion 21 and the upper wall portion 22 can be suppressed, and the heat insulating property of the heat insulating container 100 can be improved. Moreover, the vacuum heat insulating material 33 for lid | cover parts can be supported by the foamed resin material 50 of the cover part 20, and damage to the vacuum heat insulating material 33 for lid | cover parts can be prevented. Therefore, according to the heat insulating container 100 of the present embodiment, the lid heat insulating material 33 can be more reliably protected from external impact, and the heat insulating property of the heat insulating container 100 can be improved.

  Moreover, as above-mentioned, as for the heat insulation container 100 of this embodiment, the raw material of the upper wall part 22 and the lower wall part 21 is a non-foaming resin material. Thereby, desired rigidity and mechanical strength can be imparted to the upper wall portion 22 and the lower wall portion 21. Moreover, the upper wall part 22 and the lower wall part 21 can be joined and integrated, for example by 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 impact than the conventional heat insulating container 100, and the heat insulating property can be improved. it can.

  Hereinafter, the manufacturing method of the heat insulation container 100 of this embodiment is demonstrated.

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

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

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

  FIG. 4B is an explanatory diagram of the in-mold arrangement step S12 and the foamed resin filling step S13 shown in FIG. The in-mold arrangement step S12 includes the outer wall portion 11 and the inner wall portion in a state where the inner wall portion 12 to which the bottom wall vacuum heat insulating material 32 is bonded is disposed inside the outer wall portion 11 to which the side wall vacuum heat insulating material 31 is bonded. 12 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. In this step, the foamed resin material 40 is formed. By this step, the foamed resin material 40 can be joined to the outer wall portion 11 and the inner wall portion 12. In addition, after the foamed resin material 40 is formed, the injection hole 11d can be closed by welding, for example, a stopper to the injection hole 11d of the outer wall portion 11.

  FIG. 4C is an explanatory diagram of the container bonding step S14 shown in FIG. The container joining step S14 is a step of obtaining the container body 10 by joining the outer wall portion 11 and the inner wall portion 12 taken out from the mold D. Specifically, the outer peripheral portion 11 and the inner wall portion 12 are integrated by joining the peripheral edge portion 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 by, for example, heat welding. . The container main body 10 of the heat insulation container 100 shown in FIG. 1 can be obtained by the above. In addition, the cover part 20 shown in FIG. 1 can be manufactured similarly to the container main body 10 by the process similar to this manufacturing method M1.

  FIG. 5 is a flowchart showing another example of the manufacturing method of the heat insulating container 100 shown in FIG. The 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.

  6A is an explanatory diagram 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, the 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 using a molding die not shown. In this step, a concave portion 41 for accommodating the side wall vacuum heat insulating material 31 is formed on the outer surface of the side wall of the foamed resin material 40, and a concave portion 42 for accommodating the bottom wall vacuum heat insulating material 32 on the upper surface of the bottom wall of the foamed resin material 40. Can be formed.

  6B is an explanatory diagram of the heat insulating material joining step S22 shown in FIG. The heat insulating material joining step S <b> 22 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 recessed parts 41 and 42 of the foamed resin material 40 after molding through an adhesive, for example. Further, in the above-described foamed resin molding step S <b> 21, the vacuum heat insulating material 30 may be disposed 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 simultaneously.

  FIG. 6C is an explanatory diagram of the container placement step S23 and the container joining step S24 shown in FIG. The container placement step S <b> 23 is a step of placing the foamed resin material 40 with the vacuum heat insulating material 30 joined inside the outer wall portion 11 and placing the inner wall portion 12 inside the foamed resin material 40. Accordingly, the foamed resin material 40 is disposed so as to fill the space between the outer wall portion 11 and the inner wall portion 12, and the side wall vacuum heat insulating material 31 is disposed adjacent to the side wall 11c of the outer wall portion 11, and the bottom wall. The vacuum heat insulating material 32 can be disposed adjacent to the bottom wall 12 b of the inner wall portion 12.

  Container joining process S24 is a process of joining the outer wall part 11 and the inner wall part 12, and obtaining the container main body 10. FIG. Specifically, the outer peripheral portion 11 and the inner wall portion 12 are integrated by joining the peripheral edge portion 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 by, for example, heat welding. . The container main body 10 of the heat insulation container 100 shown in FIG. 1 can be obtained by the above. In addition, the cover part 20 shown in FIG. 1 can be manufactured similarly to the container main body 10 by the process similar to this manufacturing method M2.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. They are also included in the present invention.

  Hereinafter, the Example of the heat insulation container of this invention and the comparative example as the comparison object are demonstrated.

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

  Each vacuum heat insulating material 30 used the thing whose thermal conductivity is 0.002 W / (m * K) or more and 0.006 W / (m * K) or less. The foamed resin material 40 used had a thermal conductivity of 0.02 W / (m · K) or more and 0.08 W / (m · K) or less. Also, 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 ranges from about 1 mm to about 2.5 mm. did.

[Comparative example]
FIG. 8 is a schematic cross-sectional view of a heat insulating container 100Z according to a comparative example. As the heat insulating container 100Z of the comparative example, the side wall vacuum heat insulating material 31 is disposed adjacent to the side wall 12c of the inner wall portion 12, and the bottom wall vacuum heat insulating material 32 is disposed 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 example shown in FIG. The vacuum heat insulating material 31 for each side wall of the heat insulating container 100Z of Comparative Example 1 is disposed 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 dimension 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]
The heat insulation test which compares the heat insulation of the heat insulation container 100A of an Example and the heat insulation of the heat insulation container 100Z of a comparative example was done. Specifically, each of the heat insulating containers 100A and 100Z accommodated two containers C each containing 2 L of water of about 25 ° C. and a thermometer for measuring the temperature of the water in the container C. Thereafter, the heat insulating containers 100A and 100Z were 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 the heat insulation test of the heat insulation 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 was decreased by about 6 ° C. or more to less than 19 ° C. In contrast, the heat insulating container 100A of the example was able to suppress the decrease in the temperature of the water in the container C after 10 hours to about 5 ° C., and was able to maintain the temperature of the water at about 20 ° C. . From the above results, it was revealed that the heat insulating container 100A of the example has higher heat insulating properties than the heat insulating container 100Z of the comparative example.

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

Claims (9)

A heat insulating container comprising a container body and a lid for closing the opening of the container body,
The container body includes a rigid outer wall portion, an inner wall portion disposed inside the outer wall portion, and a vacuum heat insulating material disposed between the inner wall portion and the outer wall portion,
The said heat insulating container contains the vacuum heat insulating material for side walls arrange | positioned adjacent to the side wall of the said outer wall part, The heat insulation container characterized by the above-mentioned.   The heat insulating container according to claim 1, further comprising a foamed resin material that covers an inner surface of the outer wall portion and the vacuum heat insulating material. The container body has a rectangular box shape,
The peripheral edge of the vacuum heat insulating material for the side wall is disposed inside the peripheral edge of the side wall of the outer wall,
The heat insulation container according to claim 1, wherein a buffer portion in which the side wall vacuum heat insulating material is not disposed is formed at a corner portion of the container main body.   The heat insulating container according to claim 3, wherein the buffer portion is formed between an inner corner of the outer wall portion and an outer corner of the inner wall portion. The material of the outer wall portion and the inner wall portion is a non-foamed resin material,
The heat insulation container according to any one of claims 1 to 4, wherein a space between the outer wall portion and the inner wall portion is filled with a foamed resin material.   The said vacuum heat insulating material contains the vacuum heat insulating material for bottom walls arrange | positioned adjacent to the bottom wall of the said inner wall part, The heat insulation container as described in any one of Claims 1-5 characterized by the above-mentioned.   The lid includes a lower wall covering the opening of the container body, an upper wall joined to the upper side of the lower wall, and the upper wall between the upper wall and the lower wall. The heat insulation container according to any one of claims 1 to 6, further comprising: a vacuum heat insulating material for a lid portion disposed adjacent to the portion.   The heat insulating container according to claim 7, further comprising a foamed resin material that fills a space between the upper wall portion and the lower wall portion.   The heat insulating container according to claim 7 or 8, wherein a material of the upper wall portion and the lower wall portion is a non-foamed resin material.

Images